u.s. geological survey · department of the interior u.s. geological survey processed strong-motion...
TRANSCRIPT
DEPARTMENT OF THE INTERIOR
U.S. GEOLOGICAL SURVEY
Processed Strong-Motion Data forthe Central Chile Earthquake of March 3, 1985:Fifteen Accelerograph Sites Owned by CHILECTRA,
ENDESA, and the Department of Geology and Geophysics,University of Chile
K. W. Campbell S. T. Algermissen
Edgar Kausel L. M. Highland
Open-File Report 89-448
This report is preliminary and has not been edited or reviewed for conformity with U.S. Geological Survey publication standards and stratigraphic nomenclature. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the United States Government. Any use of trade names and trademarks in this publication is for descriptive purposes only and does not constitute endorsement by the U.S. Geological Survey.
Denver, Colorado
1989
CONTENTS
Introduction ......................................................... 2
Recording Sites and Instrumentation .................................. 3
Processing Methodology ............................................... 3
References ........................................................... 6
Data Availability .................................................... 7
Acknowledgements ..................................................... 7
Appendix Processed Strong-Motion Data .............................. 17
Cauquenes ....................................................... A-1
Colbun ......................................................... A-22
Constitucion ................................................... A-43
Hualane ........................................................ A-64
Iloca .......................................................... A-85
Los Vilos ..................................................... A-106
Melipilla ..................................................... A-123
Pichilemu ..................................................... A-144
Quintay ....................................................... A-165
Rapel ......................................................... A-186
San Fernando .................................................. A-207
San Isidro .................................................... A-228
Santiago (ENDESA Building) .................................... A-249
Ventanas ...................................................... A-270
Zapallar ...................................................... A-291
PROCESSED STRONG-MOTION DATA FORTHE CENTRAL CHILE EARTHQUAKE OF MARCH 3, 1985:FIFTEEN ACCELEROGRAPH SITES OWNED BY CHILECTRA,
ENDESA, AND THE DEPARTMENT OF GEOLOGY AND GEOPHYSICS,UNIVERSITY OF CHILE
INTRODUCTION
The March 3, 1985 (Mg = 7.8) earthquake that occurred off the coast of central Chile is known to have triggered 31 accelerographs located throughout the region (Fig. 1). This report presents processed records from 15 accelerographs owned and operated by CHILECTRA, Empresa Nacional de Electricidad (ENDESA), and the Department of Geology and Geophysics, University of Chile. Processed records from an additional 11 sites are presented by Celebi (1987). In addition, listings of peak accelerations from all 31 recording sites are available in Saragoni et al. (1985) and Wyllie et al. (1986). 2
The mainshock occurred at 7:47 p.m. local time (22:47 UTC) on Sunday March 3, 1985. The epicenter was located off the coast of central Chile approximately 19 km west of the town of Quintay (Fig. 1). The National Earthquake Information Center (NEIC) assigned a surface- wave magnitude of Afs 7.8 for the mainshock, which makes it the largest earthquake to strike central Chile since 1906, when an Mg 8.3 earthquake occurred near Valparaiso (Corate et al., 1986). Modified Mercalli Intensities as high as IX were reported in the coastal towns of San Antonio and Llolleo (Algermissen, 1985); however, intensities ranging from VI to VIII were most common in the epicentral area (Saragoni et al., 1985).
NEIC reported the occurrence of an m^ 5.5 foreshock just 10.4 sec prior to the mainshock. Since the two events occurred so close in time, the Seismological Service of the Department of Geology and Geophysics, University of Chile (DGG) was able only to obtain a location for the foreshock. The earthquake parameters reported by NEIC and the University of Chile (Algermissen, 1985; Wyllie et al., 1986; Celebi, 1987) are given in the following table.
The accelerograph at Peldehue triggered but apparently malfunctioned.
San Isidro accelerograph site is mistakenly referred to as San Pedro in these two references.
Origin Time Lati- Longi- Depth mb Mg Insti- UTC tude tude (km) tute
22:46:56.8 33.11'S 71.74*W 33 5.5 NEIC
22:46:59.9 33.24'S 71.86°W 16 ~ DGG
22:47:07.2 33.14'S 71.87°W 33 6.7 7.8 NEIC
The depths reported by NEIC were constrained to 33 km during their computer analyses and, therefore, do not represent an accurate estimate of focal depth.
Focal mechanism studies, analyses of teleseismic recordings, geodetic measurements, and aftershock studies have led researchers to infer thrusting along the shallow-dipping interface of the Nazca and South American plates during the mainshock and many of the larger aftershocks (e.g., Dziewonski et al. , 1985; Comte et al. , 1986; Christensen and Ruff (1986); Korrat and Madariaga, 1986; Monfret and Romanowicz, 1986; Pardo et al. , 1986; Barrientos, 1988; Choy and Dewey, 1988). This is consistent with subduction of the Nazca plate beneath the continent of South America.
RECORDING SITES AND INSTRUMENTATION
The locations of all accelerographs that recorded the earthquake (except Peldehue) are indicated on Figure 1. The squares identify the 15 sites analyzed in this report. Coordinates, site conditions, and instrument characteristics for each site are summarized in Tables 1 and 2. Epicentral distances, peak amplitudes, and filter parameters for each accelerogram are listed in Table 3.
All but three of the recording sites were equipped with Kinemetrics SMA-1 strong-motion accelerographs. The exceptions were San Isidro and Santiago (ENDESA building), which housed Katsujima PK-130 accelerographs, and Rapel, where a Teledyne RFT-250 accelerograph was installed.
The SMA-1 and RFT-250 accelerographs are fixed-gain instruments that record acceleration on 70-mm film with a recording speed of 1 cm/sec. Nominal values for their recording sensitivity, natural frequency, and damping are 19 mm/£, 25 Hz, and 60 percent of critical, respectively. The PK-130 accelerograph is an automatic gain-ranging accelerograph that records acceleration on 90-mm light-sensitive paper with a recording speed of 5 cm/sec. The natural frequency and damping of the PK-130 accelerograph are not known; however, its frequency response is designed to be flat over the frequency range 0.3-30 Hz.
PROCESSING METHODOLOGY
Processing was performed with AGRAM, an accelerogram processing package developed by the U.S. Geological Survey (Converse, 1984). The relatively poor condition of the original film records made it necessary to digitize the recordings by hand rather than by the laser trace- following device usually used by the U.S. Geological Survey to process strong-motion records. Therefore, four AGRAM routines IOMTAP, BUTTER, REFORM, and SCALE could not be used in their present form and were replaced with similar routines designed to perform the same basic functions. Details of the processing steps are summarized below.
Digitization. The 70-ram film records were photographically enlarged to five times there original size to insure adequate signal-to- noise ratios. For long records, this required that the film be photographed in 100 cm frames, representing about 20 sec of record time. The frames were overlapped by about 5-10 cm during the photographic process to allow accurate reconstruction of the accelerogram after digitization. Because of the large sensitivity and fragile nature of the PK-130 recordings, they were not enlarged prior to digitization.
Each frame was digitized by means of a hand-held cursor on a digitizing table having a resolution of 0.001 in (0.00254 cm). This process resulted in a sample rate of about 250-350 samples per second and an amplitude resolution of about 0.3 cm/sec2 (about 0.0003#) for the film records and 0.03-0.4 cm/sec2 (about 0.00003-0.0004^), depending on the gain of the instrument, for the paper records. When possible, six traces were digitized for each accelerogram: three acceleration traces (one vertical and two horizontal components), two fixed traces, and one set of timing marks. Timing marks were written every 0.5 sec on the film records and every 0.1 sec on the paper records. There were no fixed traces on the accelerograms obtained at Colbiin, Melipilla, Rapel, and Ventanas, so only the acceleration traces and timing marks were digitized for these records.
Phase I (Uncorrected Acceleration). Starting times for each trace were adjusted to minimize phasing errors and the timing trace was interpolated to determine relative time for each data point. Each trace was then adjusted to have an average amplitude of zero, after which absolute amplitudes were computed from instrument sensitivities.
Phase II (Corrected Tine Series). Phase I data were interpolated to 200 samples per second, and in the case of the film records, a frequency domain instrument-correction operator was applied to remove the response of the recording system. Since the high-frequency response of the PK-130 accelerograph is flat to about 30 Hz, no instrument correction was applied to these time series.
When fixed traces were available, high-frequency noise was identified from ratios of the Fourier amplitude spectra of the acceleration and fixed traces. The ratios were plotted as a linear function of frequency to emphasize the high-frequency tail of the spectra. When fixed traces were not available, high-frequency noise was identified directly from the Fourier amplitude spectra of the
acceleration time series. High-frequency noise was removed by applying a 5 Hz bandwidth cosine taper to the Fourier amplitude spectra.
When fixed traces were available, low-frequency noise was identified from ratios of the pseudorelative velocity (PSRV) response spectra of the acceleration and fixed traces. The ratios were plotted as a logarithmic function of period to emphasize the low-frequency tail of the spectra. The filter parameter was chosen to give a minimum signal-to-noise ratio of 2:1, corresponding to signal-to-noise ratios ranging from about 3:1 to 8:1 for peak displacement. When fixed traces were not available, low-frequency noise was identified directly from the PSRV spectra of the acceleration time series. In this latter case, the filter parameter was selected to correspond to the frequency at which the presence of noise became visible on the PSRV spectra. Low-frequency noise was removed with a bidirectional (zero phase), fourth-order Butterworth filter applied in the time domain.
The PK-130 recording system applies a lowcut filter to the acceleration time series as it is recorded. As a result, the low- frequency response of this system begins to roll off at a frequency of about 0,4 Hz (2.5 sec). However, since the response of the system at 0.2 Hz (5.0 sec) the approximate upper limit of useable signal (Table 3) is still 85 percent of the unfiltered response, a low-frequency correction was not found to be necessary.
The instrument-corrected acceleration time series were padded with zeros, integrated, and filtered to obtain velocity. The resulting velocity records were then integrated to obtain displacement. Finally, the padded acceleration time series were filtered and unpadded to obtain corrected acceleration, velocity, and displacement.
Phase III and IV. Fourier amplitude spectra (FAS) and response spectra in terms of relative displacement (RD), relative velocity (RV), pseudorelative velocity (PSRV), absolute acceleration (AA), and pseudoabsolute acceleration (PSAA) were computed from the corrected acceleration time series at 91 periods ranging from 0.04 to 15 sec. The response spectra were calculated for five values of critical damping: 0, 2, 5, 10, and 20 percent.
Processed Data. Plots of the processed time series, Fourier amplitude spectra, and response spectra are displayed in the Appendix. These plots include uncorrected acceleration time series; corrected acceleration, velocity, and displacement time series; Fourier amplitude spectra, and PSRV response spectra. The plots of response spectra include both a logarithmic tripartite plot of pseudorelative velocity and a linear plot of relative velocity. The Fourier spectra are plotted as a function of both logarithmic and linear functions of frequency. On the Fourier spectra plots, FC identifies the lowcut filter limit, F^ identifies the highcut filter limit, F^ identifies the end of the highcut filter transition bandwidth, and AQ identifies the amplitude of the zero-frequency asymptote.
REFERENCES
Algermissen, S.T. (Editor), 1985, Preliminary report of investigations of the Central Chile earthquake of March 3, 1985: U.S. Geological Survey Open-File Report 85-542, 180 p.
Barrientos, S.E., 1988, Slip distribution of the 1985 Central Chile earthquake, Tectonophysics, vol. 145, p. 225-241.
Celebi, M., 1987 (Revised 1988), Processed Chile earthquake records of 3 March 1985 and aftershocks: U.S. Geological Survey Open-File Report 87-195, 255 p.
Christensen, D.H., and L.J. Ruff, 1986, Rupture process of the March 3, 1985 Chilean earthquake: Geophysical Research Letters, vol. 13, p. 721-724.
Choy, G.L., J.W. Dewey, 1988, Rupture process of an extended earthquake sequence teleseismic analysis of the Chilean earthquake of March 3, 1985: Journal of Geophysical Research, vol. 93, p. 1103-1118.
Comte, D., A. Eisenberg, E. Lorca, M. Pardo, L. Ponce, R. Saragoni, S.K. Singh, and G. Suarez, 1986, The 1985 Central Chile earthquake a repeat of previous great earthquakes in the region?: Science, vol. 233, p. 449-453.
Converse, A., 1984, AGRAM: a series of computer programs for processing digitized strong-motion accelerograms: U.S. Geological Survey Open- File Report 84-525, 107 p.
Dziewonski, A.M., J.E. Franzen, and J.H. Woodhouse, 1985, Centroid- moment tensor solutions for January-March, 1985: Physics of the Earth and Planetary Interiors, vol. 40, p. 249-258.
Korrat, I., and R. Madariaga, 1986, Rupture of the Valparaiso (Chile) gap from 1971 to 1985: in Earthquake Source Mechanics, edited by Das, S., J. Boatwright, and C.H. Scholz: Washington, D.C., American Geophysical Union Geophysical Monograph 37, Maurice Ewing Volume 6, p. 247-258.
Monfret, T., and B. Romanowicz, 1986, Importance of on scaleobservations of first arriving Rayleigh wave trains for source studies example of the Chilean event of March 3, 1985, observed on the geoscope and IDA networks: Geophysical Research Letters, vol. 13, p. 1015-1018.
Pardo, M., D. Comte, and A. Eisenberg, 1986, Secuencia sismica de Marzo en Chile Central: J. Chilenas Sismol. Ing. Antisismica, No. A-1-A- 15 (in Spanish).
Saragoni, R., Gonzales, P., and Fresard, M., 1985, Analisis de los accelerogramas del terremote del 3 de Marzo de 1985: Santiago, Chile, Universidad de Chile Departamento de Ingenieria Civil Publicacion SES I 4/1984 (199), 90 p. (in Spanish).
Servicio National de Geologia y Mineria, 1982, Mapa Geologico de Chile, Hoja No. 3 de 6, 30 e 34'-37'10' Lat. S. , Scale 1:1,000,000 (in Spanish).
Wyllie, L.A., N. Abrahamson, S. Aroni, B. Bolt, G. Castro, M. Celebi, M. Durkin, L. Escalante, J. Gates, R. Luft, D. McCormick, R. Olsen, A. Schiff, P. Smith, M. Sozen, J. Vallenas, and P. Yanev, 1985, The Chile earthquake of March 3, 1985: Earthquake Spectra, vol. 2, p. 249-512.
DATA AVAILABILITY
A magnetic tape of the processed data described in this report can be obtained from the National Geophysical Data Center in Boulder, Colorado. All requests should be forwarded to:
National Geophysical Data Center/NOAAWorld Data Center-A for Solid Earth Geophysics
325 Broadway, Code E/GC1Boulder, CO 80303
ACKNOWLEDGEMENTS
The record processing described in this report was funded jointly by the U.S. Nuclear Regulatory Commission, the U.S. Office of Foreign Disaster Assistance (through AID), and the U.S. Geological Survey. Dr. Kausel's participation was partially supported by project FONDECYT-CHILE 88-1186. The accelerograms were kindly provided by the Department of Geology and Geophysics, University of Chile; the Empresa Nacional de Electricidad (ENDESA); and CHILECTRA. Bonny Askew provided computer programming support during the initial phases of the study. The records were digitized by Dean Yanacito.
TABLE
1
Stat
ion
Loca
tion
s an
d Site Conditions
00
Recording
Stat
ion
Cauq
uene
s
Col bu
n
Cons
titu
ci6n
Hualane
Iloca
Los
Vilo
s
Meli
pill
a
Pichilemu
Quin
tay
Rape
l
San
Fernando
San
Isid
ro
Sant
iago
Lati
tude
CS)
36.0
0
35.7
2
35.3
0
34.9
7
34.9
2
31.9
2
33.68
34.3
8
33.20
34.0
3
34.6
0
32.9
0
33.4
5
Long
itud
eCW)
72.22
71.43
72.32
71.8
2
72.22
71.5
0
71.2
2
72.02
71.68
71.58
71.00
71.27
70.67
Structure
2-story
bldg.
Tunn
el
2-story
bldg
.
1-st
ory
bldg.
1-story
bldg.
1 -st
ory
bldg.
1-story
bldg
.
1-story
bldg.
Small
shel
ter
Tunnel
1-st
ory
bldg
.
1-story
bldg.
6-story
bldg.
Location
Grou
nd level
Subg
rade
Grou
nd level
Grou
nd level
Grou
nd level
Grou
nd level
Grou
nd le
vel
Grou
nd level
Grou
nd le
vel
Subg
rade
Grou
nd le
vel
Grou
nd le
vel
Basement
JU
Site Ge
olog
y
Quaternary alluvium
Olig
.-Mio. volcanics
Pale
ozoi
c in
trus
ives
Quaternary alluvium
Quat
erna
ry al
luvi
um
Triassic se
dime
nts
Quaternary al
luvi
um
Pale
ozoi
c metamorphics
Paleozoic
intrusives
Pale
ozoi
c intrusives
Quaternary alluvium
Quat
erna
ry alluvium
Quaternary alluvium
_ **
Ow
ner
DDG
ENDESA
DDG
DDG
DDG
DDG
DDG
DDG
ENDESA
ENDESA
DDG
ENDESA
ENDESA
TABLE
1 (Continued)
Stat
ion
Loca
tion
s an
d Si
te Conditions
CD
Recording
Stat
ion
Ventanas
Zapa
llar
Lati
tude
rs)
32.7
5
32.5
7
Long
itud
eno 71.49
71.47
Structure
6-st
ory
bldg
.
1-story
bldg.
Loca
tion
Grou
nd le
vel
Grou
nd level
ft Site Geology
Quaternary alluvium
Juarassic
intrusives
fftf
Owner
CHIL
ECTR
A
DDG
ft*rServicio
National de
Ge
olog
ia y Mi
neri
a (1982)
DDG:
St
atio
ns ow
ned
by th
e Department of
Ge
olog
y an
d Geophysics,
University of
Chile
ENDE
SA:
Stations owned
by the
Empr
esa
Naci
onal
de El
ectr
icid
adCHILECTRA: Stations owned
by CH
ILEC
TRA
TABLE 2
Instrument Characteristics
Recording Instrument Station Type
Cauquenes
Colbtin
Constitucion
Hualane
Iloca
Los Vilos
Melipilla
Pichilemu
Quintay
Rapel
SMA-1
SMA-1
SMA-1
SMA-1
SMA-1
SMA-1
SMA-1
SMA-1
SMA-1
RFT-250
Component Sensitivity (mm/s)
North-South Vertical East-West
Longitudinal Vertical Transverse
North-South Vertical East-West
North-South Vertical East-West
North-South Vertical East-West
North-South Vertical East-West
North-South Vertical East-West
North-South Vertical East-West
Longitudinal Vertical Transverse
North-South Vertical East-West
18.5 19.5 18.0
18.8 17.8 18.7
17.3 17.6 16.9
17.7 17.7 17.4
17.5 18.2 19.8
18.4 18.9 19.6
19.0 18.5 21.2
18.1 16.8 19.1
17.2 19.2 19.8
37.4 35.6 36.2
Natural Damping Frequency (%)
(Hz)
25.6 25.4 25.7
25.8 25.8 25.3
25.6 26.1 27.0
25.9 25.6 26.3
25.7 26.3 24.7
25.4 25.6 25.2
25.0 26.0 25.0
26.4 26.5 25.5
26.2 24.8 25.1
17.8 19.0 18.3
57.9 60.3 60.0*
60.0* 60.0*
60.0*
58.5 58.5 61.5
63.8 63.8 60.3
60.6 63.3 60.0
58.5 61.5 61.2
62.3 57.7 59.4
58.8 58.5 58.2
60.0* 60.0*
60.0*
60.0*
60.0 60.0*
10
TABLE 2 (Continued)
Instrument Characteristics
RecordingStation
San Fernando
InstrumentType
SMA-1
Component
North-SouthVerticalEast-West
Sensitivity(mm/£)
18.416.918.0
NaturalFrequency
(Hz)
25.927.725.6
Damping(%)
67.460.863.8
San Isidro
Santiago
PK-130
PK-130
LongitudinalVerticalTransverse
LongitudinalVerticalTransverse
61.3-980.7 61.3-980.7 61.3-980.7
****
61.3-980.7 61.3-980.7 61.3-980.7
****
Ventanas
Zapallar
SMA-1 North-SouthVerticalEast-West
SMA-1 North-SouthVerticalEast-West
17.817.417.5
19.618.316.9
25.0 it
25.025.0*
25.225.826.9
62.660.459.3
60.364.058.5
Estimated
Automatic gain ranging
11
TABLE
3
Summ
ary
of Ground Motion
Data
ro
Recording
Epicentral
Stat
ion
Dist
ance
(k
m)
Cauq
uene
s 319.1
Colb
un
289.
2
Cons
titu
cion
24
3.4
Hualane
203.
2
Iloc
a 20
0.2
Los
Vilo
s 13
9.8
Highcut
Filt
er
Limi
t (H
z)
15.0
17.0
12.0
22.0
28.0
21.0 9.0
19.0 9.0
19.0
28.0
21.0
18.0
35.0
18.0
20.0
22.0
20.0
Lowc
ut Filter
Component
Limi
t (sec)
2.7
2.2
3.3
3.0
2.8
4.3
4.0
4.0
4.5
3.4
2.8
4.0
2.8
3.0
3.0
2.4
2.8
2.9
Nort
h-So
uth
Vertical
East
-Wes
t
Longitudinal
Vert
ical
Tran
sver
se
Nort
h-So
uth
Vert
ical
East-West
Nort
h-So
uth
Vert
ical
East-West
Nort
h-So
uth
Vertical
East-West
North-South
Vert
ical
East-West
Peak Accel
. (c
m/se
c^)
Uncorr.
Corr.
81.9
43.3
112.3
54.3
33.8
41.2
132.7
40.6
79.6
173.
294
.5136.5
207.
090
.9275.7
36.9
19.5
25.8
84.3
41.2
110.
7
47.8
29.6
44.1
127.9
38.9
78.5
167.
183
.413
3.5
221.3
85.3
272.
9
33.9
19.8
24.5
Peak
Ve
l.
(cm/
sec)
6.05
2.74
8.61
7.07
2.81
5.26
17.8 4.12
7.96
11.4 5.75
11.0 9.34
5.70
15.1 2.85
2.26
2.83
Peak Disp.
(cm)
0.710
0.38
41.
16
1.35
0.488
1.51
2.63
0.565
1.68
1.51
1.18
2.39
1.10
1.20
1.37
0.41
10.437
0.487
TABLE
3 (Continued)
Summary
of Gr
ound
Mo
tion
Da
ta
Recording
Epic
entr
al
Station
Dist
ance
(km)
Meli
pill
a 85.2
Pichilemu
138.
4
Quin
tay
18.9
Rapel
102.
4
San
Fernando
181.0
San
Isidro
58.2
Highcut
Filt
er
Limit
(Hz)
22.0
32.0
24.0
23.0
22.0
27.0
30.0
32.0
30.0
17.0
26.0
17.0
23.0
37.0
22.0
25.0
25.0
25.0
Lowc
ut Fi
lter
Co
mpon
ent
Limit
(sec)
7.5
3.7
5.0
6.0
5.0
5.8
4.0
3.5
4.6
6.5
3.8
5.0
4.0
3.0
5.1
5.0
2.6
5.5
North-South
Vert
ical
East
-Wes
t
North-South
Vertical
East-West
Long
itud
inal
Vertical
Tran
sver
se
Nort
h-So
uth
Vert
ical
East
-Wes
t
North-South
Vertical
East
- West
Long
itud
inal
Vert
ical
Transverse
Peak A
ccel .
(cm/
sec^
) Un
corr
. Co
rr.
641.
6274.
3509.
8
259.
7122.
1183.
6
231.
5162.
9240.
3
226.
263.3
89.5
275.
112
1.2
329.
8
711.
6*41
6.1
686.
3
673.
024
9.9
518.1
254.1
119.
317
5.3
231.5
180.
9255.0
219.2
61.3
87.6
285.1
119.1
332.8
706.8
393.3
696.0
Peak V
el.
(cm/sec)
34.2
11.8
40.3
11.7 5.84
12.5
12.5 6.08
19.3
10.4 4.29
6.06
24.5 9.03
23.9
43.2
19.8
43.4
Peak Di
sp.
(cm)
12.0 2.81
6.03
3.74
1.86
4.08
2.80
1.19
3.50
3.14
0.890
1.71
4.23
2.02
5.51
6.91
1.69
5.54
TABL
E 3
(Continued)
Summary
of Ground Motion
Data
Recording
Epicentral
Station
Distance
(km)
Santiago
117.1
Ventanas
56.0
Zapa
llar
73
.5
Highcut
Filter
Limit
(Hz)
30.0
30.0
30.0
18.0
30.0
19.0
20.0
20.0
20.0
Lowc
ut Fi
lter
Component
Limit
(sec
)
3.0
3.2
4.5
5.0
3.3
4.5
1.8
1.5
2.4
Longitudinal
Vertical
Tran
sver
se
Long
itud
inal
Vert
ical
Tran
sver
se
North-South
Vert
ical
East-West
Peak A
ccel.
o(c
m/se
c*)
Unco
rr .
121.6
96.3
118.9
206.
517
6.0
228.0
285.3
210.1
296.6
Corr.
124.
094.6
119.6
208.
917
3.4
223.
0
265.
119
1.0
298.5
Peak V
el.
(cm/sec)
11.7 4.77
14.1
23.3 7.10
24.6
11.2 5.20
13.5
Peak
Disp.
(cm)
1.21
0.91
3.40
3.88
1.20
4.60
1.14
0.479
1.69
Orig
inal
trace
was
off
scale
and
was
reconstructed
to es
tima
te the
peak value
Figure 1 (Overleaf). Map of Central Chile showing the locations of accelerographs that recorded the March 3, 1985 earthquake (circles and squares). The squares represent accelerograms processed in this report. The star and circle mark the NEIC location of the Mg 7.8 mainshock. The two stars mark the NEIC and the Seismological Service, Department of Geology and Geophysics, University of Chile (DGG) locations of the m 5.5 foreshock.
15
73s 72<
Uj
O
O
33'
34*
0JLLAPEL \
39*
PAPUDo
VENTANAS'
LOS VILOS
)LA LIGUA IZAPALLAR
V
xX
r SAN FELICE
LLAY LLAY \ BSAN ISIDRO SALADl'qtO
CIVINA DEL MAR
~ ALMENDRALQUINTAY
LLOLLEOBMELIPILLA
SANTIAGO
PICHILEMU
SAN FERNANDO"
ILOCABHUALANE
CONSTITUCION TALCA
EL
BCAUQUENES
gCHILLAN NUEVA. ^CHILLAN VIE JO (
or
O
16
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake, 3/3/85 22:47:07 UTC, M -7.8
o
Cauquenes, Chile
DESCRIPTION
Instrument Characteristics:
Frequency (Hz)
Damping (% Critical)
Filter Parameters:
Highcut (Hz)
Lowcut (Hz)
Peak Parameters:
Peak Acceleration, -Unc. (cm/s/s)
Peak Acceleration, A (cm/s/s)
Peak Velocity, V (cm/s)
Peak Displacement, D (cm)
Parameter Ratios:
V/A| (sec)
|AD/V2 |
COMPONENT
North-South Vertical
25.6 25. 4
57.9 60.3
15.0 17.0
0.370 0.455
81.9 -43.3
84.3 -41.2
6.05 -2.74
-0.710 0.384
0.072 0.067
1.6 2.1
East-West
25.7
60.0*
12.0
0.300
112.3
110.7
-8.61
-1 .16
0.078
1.7
Nominal Value
A-l
z-v
SCALED INSTRUMENTRESPONSE
J. CM/SEC/SEC -
SCALED INSTRUMENT RESPONSE CM/SEC/SEC _>
oo
SCALED INSTRUMENT RESPONSE
i CM/SEC/SEC a, r_ to b b
m
crmxO
tnmf!: 5* °
mp^rn.
tn
8-V
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC -
SCALED INSTRUMENT RESPONSE CM/SEC/SEC ^
SCALED INSTRUMENTRESPONSE
i CM/SEC/SEC «tO N)b bl______!_______I
-0 m
*5-*e°
£§5 <= * ;>
r»2
mzj i/>mf
OJo
D=U1=C?=ra^m ^mi cn-^pn
Blcol^r^^ -r^n tooori
sg-^S
CO
RR
EC
TED
AC
CE
LER
AT1
0N.
VE
L0C
1TY
, AN
D D
ISP
LAC
EM
EN
T 2
00
.00
SP
S
CE
NTR
AL
CH
ILE
E&
.. 3/3
/85,
22:4
7:0
7 U
TC.
MS
-7.8
CA
UQ
UE
NE
S.
CH
ILE
. N
0RTH
-S0U
YH
P
EA
K V
ALU
ES
: A
CC
EL-
84.2
5 C
M/S
EC
/SE
C.
VE
LlS
ciT
Y-6
.05
CM
/SE
C,
01S
PL-0
.71 C
M
85.0
-i
z o w -8
5.0
-1
0.10
-i
-6.1
0 J
0.7
2
-i
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I2
4 6
8 10
12
14
16
18
20
2
2
24
26
28
30
3
2
34
3
0
38
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
2 4
Q 8
10
12
14
16
18
2
0
22
24
2
8
28
30
32
3
4
36
3
8
a. t-»
o
-0.7
2 J
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
2 4
6 8
10
12
14
16
18
20
22
24
2
6
28
3
0
32
34
3
0
38
SE
C0N
DS
s-v
DISPLACEMENTVEL0CITY CM/SEC
ACCELERATIONo, i CM/SEC/SEC o 01 cji o b
o_
m
? s CZ 33m 33tn m
o
R "m
CD
m
>m
>£->
rf
mtn m p2 ^/ to o? b 7 o
P ^8 2 tnn
9-V
o!_
DISPLACEMENTCM 0
VELBcmrCM/SEC
ACCELERATI0N 1 CM/SEC/SEC j,. ro ro b b I______!______i
-o m
CD
n
mm en>
m
ilsn
en o 5-
S 5.m.
r-)i on3 - min m n
CO 00
o oen -o en
DISPLACEMENT CM
VELBCITY CM/SEC
ACCELERATI0N 1 CM/SEC/SEC ^ 10 ro b b
m
m in
o n
O IS JO
o.m ;o
m n
U)oo
pO
-o en
8-V
OISPLACEMEKT CM
VELBCITY CM/SEC
ACCELERAT10N CM/SEC/SEC
CO
n
=
o_
Cm en
os>7373m n
">m
0n 5
ntn00 2 m
Bn»TJ OCO O
i Or* to o t/> n
6-V
VELBCITY CM/SEC
ACCELERATION CM/SEC/SEC -
m
r- OC ISm TOCO 70
m > o
§ RS.- -HO
P >m ^ r~!IJy _fcfM
o 5>
^SgS?
rn
vj im o
o? 8 r2 O i O
o n
to
F0U
R1E
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EG
.. 3/3
/85.
22:4
7:0
7 U
TC.
hS
-7.8
CA
UQ
UE
NE
S,
CH
lCE
, N
0RT
H-S
0UfH
C
0MP
UTI
NG
0P
T10
NS
- Z
CR
0SS
.SM
00T
H(1
0).N
0N0I
SE
F.
O
UJ
V) \
Ju
O UJ S Q- r a: UJ U. O
o
4-A
,
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85
. 22:4
7:0
7 U
TC.
MS
-7.8
CA
UQ
IJE
NE
S.
CH
ILE
, V
ER
TIC
AL
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
S.S
M00
TH
UO
).N
0N0I
SE
CMFa
i 4
/Fr
.
o tu 10 v» r o UJ
Q D Q. r on
tu 4 on Q
U.
U.
Q (0
T
rT
T
Ii
i i
i0
1
L0G
0F
FR
EQ
UE
NC
Y,
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q.,
3/3
/85,
22
:47
:07
UTC
, M
S-7
.8C
AU
QU
EN
ES
, C
HIL
E,
EA
ST
-WE
Sf
C0M
PU
TIN
G 0
PT
I0N
S-
ZC
R0S
S.S
M00
TH
UO
),N
0N0I
SE
to
o UJ r o UJ Q Q. r UJ > »
OH ca
u. u.
ca ca
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q.,
3/3
/85,
22:4
7:0
7 U
TC,
MS
-7.8
CA
UQ
UE
NE
S,
CH
ILE
, N
0RT
H-S
0ufH
C
0MP
UT
ING
0P
T10
NS
- Z
CR
0SS
.SM
00T
H(1
0).N
0N0I
SE
CO
o LU CJ u
o a. r a: UJ »-i
(£.
D a
u. 8
8
FRE
QU
EN
CY
. H
Z
1012
H16
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, MS-7.8
CAUQUENES, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
CJ LU CO
21 CJ
LU CO
Q_ CO LU
>- J
CJ
I LU
CD
0.04
\/x><\/ \
0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI0D-SEC0NDS
A-16
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, MS-7.8
CAUQUENES, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
uLJ CO
U iLJ CO~z.SI CL CO LU
CJ S3_ I LU
CD SI
0.04 0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI0D-SEC0NDS
A-17
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, MS-7.8
CAUQUENES, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
uLU CD
Oi
LU
(3 Q_c/>LU
CJ (3 i LU>
CD
0.04 0.1 0.2 0.4 124
UNDAMPED NATURAL PERI0D-SEC0NDS10
A-18
120
100
oLU CO
CO
a.COUJo:>-t
O
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, MS-7.8
CAUQUENES, CHILE, N0RTH-S0UTH 0,2,5,10,20.PERCENT CRITICAL DAMPING
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-19
70
60
50oLU CO-V.
oLU en
40
a.COLU
30
o ts_J LU> 20
10
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, MS-7.8
CAUQUENES, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
RV FAS
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-20
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, MS-7.8
CAUQUENES, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
250
200 -
oUl
LU CO
a a.COUJce
o
150 -
100 -
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-21
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake of 3/3/85 47:07 UTC, Mg-
Colbun, Chile
22:47:07 UTC, Ms-7.8
DESCRIPTION COMPONENT
Longitudinal Vertical Transverse
Instrument Characteristics:
Frequency (Hz)
Damping (% Critical)
Filter Parameters;
Highcut (Hz)
Lowcut (Hz)
Peak Parameters:
Peak Acceleration, Unc. (cm/s/s)
Peak Acceleration, A (cm/s/s)
Peak Velocity,"V (cm/s)
Peak Displacement, D (cm)
Parameter Ratios:
|V/A| (sec)
|AD/V2 |
25.8
60.<
22.0
0.333
54.3
47.8
-7.07
-1.35
0.15
1.3
25.8
60.
28.0
0.357
0.095
1.8
25.3
60.0'
21.0
0.233
33.8
29.6
2.81
-0.488
-41 .2
44.1
-5.26
1 .51
0.12
2.4
Nominal value
A-22
ss-v
ro b
SCALED INSTRUHENT RESPONSE
CM/SEC/SEC ^
SCALED INSTRUMENTRESP0NSE
CM/SEC/SEC wAb
_____l______I
SCALED INSTRUMENTRESP0NSE
ti, CM/SEC/SEC 01 01 01 b b I______1______I
m
n:
ISzD
00_
ro_
CO
roo_
m
SCALED INSTRUMENTRESPONSE
i CM/SEC/SEC * to 10 b b j
U)
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC u
SCALED INSTRUMENTRESPONSE
i CM/SEC/SEC o,(X CJlb b
sz-v
DISPLACEMENT CM
VEL0CITY CM/SEC
ACCELERATI0N 1 CM/SEC/SEC ^CD COb b I______i______i
0
m
>m
x
(851
VI I
92-V
DISPLACEMENT CH
VELBCITY CM/SEC
o_
tomn
ena o
o wB * _
9 8.
Gi
Nl
5-l
O
ACCELERATI0N i CM/SEC/SEC ^00 CDb b
o »
O
00
eno_
o
CD_
"0rn
c rn en
n o7070m o
R R3 <n
n
- rn
m n* OOfOo o " oen P T3 O P- O
n
O CD O.
LZ-V
VELOCITY CM/SECtu
CDo
ACCELERATI0N £ CM/SEC/SEC to O Ob b i______i______im
roroc m50
m o
ro tobi ui
>m
93
cn
ss?
m
roCD.
IO
n on n - mCOm n
DLO
(On
o ob oCO-oCO
6Z -V
DISPLACEMENT CM
VEL0CITY CM/SEC
ACCELERATI0N i. CM/SEC/SEC ^ ui en b b 1______j______i
ro_
00
o_
m
8 C SOm ;otn m
o
>m
n
ffiFwp-nG»R<=ooqPm.01^
ffi n
to1)
en
n
pb otn -o to
os-v
DISPLACEMENT CMui
L> o
VEL0CITY CM/SEC
O COS * _
ACCELERATI0N 1 CM/SEC/SEC >. ca en b b i______!______I
ns
m
CJen
u00
0_
o »
O
oC :0m ;oin m
o
*s°>m
fj.
in m o ^ ^§ »-in
10 n ?
Ol M
01to m
in en171 m i z o
2 in
CJl
n
Oo oen -o en
a o
is-v
L0G 0F F0URIER AMPLITUDE, CM/SEC
0 1
os ~n-n ;o m omz n
O
n m
3 5s "0 ?CC £*
Sr- " D
co m
-n»4- 4-
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85
, 22:4
7:0
7 U
TC,
MS
-7.8
C0L
&U
N,
CH
ILE
. V
ER
TIC
AL
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
S.S
M00
TH
UO
).N
0N0I
SE
Fc
CO to
o UJ in -x o LU
Q Q. r a: UJ or u.
u.
...
I
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3/3
/85.
22
:47
:07
UTC
. M
S-7
.8C
0LB
UN
, C
HIL
E\
TRA
NS
VE
RS
E
C0M
PU
TIN
G 0
PT
10N
S-
ZCR
0SS
.SM
00TH
(10)
.N0N
0IS
E
:e 4
":i
4"
H'F
V
u UJ to o u Q O- r
or or u,
u.
II
0 1
L0G
0F
FR
EQ
UE
NC
Y,
HZ
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3
/3/8
5,
22:4
7:0
7 U
TC,
MS
-7.8
C0L
BU
N,
CH
ILE
. L0
NG
ITU
DIN
AL
C0M
PU
TIN
G 0
PT
10N
S-
ZCR
0SS
,SM
00TH
UO
),N0N
01S
E
oi
o UJ
CO o UJ o 0. r (XL
UJ
t-i
(XL (3
U.
U.
(3 CD
10
FRE
QU
EN
CY
, H
Z
1520
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3/3
/85,
22:4
7:0
7 U
TC,
MS
-7.8
C0L
&U
N,
CH
ILE
. V
ER
TIC
AL
C0M
PU
TIN
G 0
PT
10N
S-
ZCR
0SS
.SM
00TH
(10)
.N0N
0IS
E
CO
Cn
o UJ o u
o D t
_l o.
r < Of
UJ
U.
IS
Fci
CMu
10
15FR
EQ
UE
NC
Y.
HZ
2025
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3/3
/85,
22:4
7:0
7 U
TC,
MS
-7.8
C0L
BU
N.
CHIL
E".
TRA
NS
VE
RS
E
C0M
PU
TIN
G 0
PT
10N
S-
ZCR
0SS
.SM
00TH
UO
),N0N
0IS
E
OJ
CO CO
u UJ r
u UJ
Q H-
» «
CL r
< a: UJ ca
LL U.
ca to
ca
10
FRE
QU
EN
CY
, HZ
1520
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
C0LBUN, CHILE, L0NGITUDINAL 0,2,5,10,20 PfeRCENf CRITICAL DAMPING
UJ CO
CJI
UJ CO
QL CO UJo:
CJ
_I UJ>CD
0.04 0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI0D-SEC0NDS
A-37
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EGL 3/3/85, 22:47:07 UTC, Ms-7.8
C0LBUN, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
CJ UJ CO \2:CJ
UJ COzIS) Q_ CO UJo:
CJ IS) I UJ
CD IS)
-1
0.04 0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI0D-SEC0NDS
A-38
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
C0LBUN, CHILE, TRANSVERSE 0,2,5,10,20 PERCENT CRITICAL DAMPING
uLJ CO^x
2:CJ
illCO
CL CO LJ
CJs I UJ>CD
0.04 0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERIOD-SECONDS
A-39
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
C0LBUN, CHILE, L0NGITUOINAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
100
80 -
LUco
il COzSIQ_toUJct:
u
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-40
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
C0LBUN, CHILE. VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-41
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
C0LBUN, CHILE, TRANSVERSE 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-42
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake, 3/3/85 22:47:07 UTC, Ms»7.8
Constitucion, Chile
DESCRIPTION
Instrument Characteristics:
Frequency (Hz)
Damping (% Critical)
Filter Parameters:
Highcut (Hz)
Lowcut (Hz)
Peak Parameters:
Peak Acceleration, Unc. (cm/s/s)
Peak Acceleration, A (cm/s/s)
Peak Velocity, V (cm/s)
Peak Displacement, D (cm)
Parameter Ratios:
|V/A| (sec)
lAD/V2
COMPONENT
North-South Vertical
25 . 6 26 . 1
58.5 -58.5
9.0 19.0
0.250 0.250
-132.7 -40.6
-127.9 38.9
-17.8 -4.12
2.63 0.565
0.14 0.11
1.1 1.3
East-West
27.0
61 .5
9.0
0.222
79.6
78.5
7.96
1.68
0.10
2.1
A-43
SCALED INSTRUMENTRESPONSE
A CM/SEC/SEC eo o o b o
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC ^
SCALED INSTRUMENT RESP0NSE
CM/SEC/SEC -
-omo >(S T^Z.^ts>r> < im£~:z
RS? RS" Qzo
oo
(Jl ' 00°>%
tf)
SCALED INSTRUMENT RESP0NSE CM/SEC/SEC
SCALED INSTRUMENT RESP0NSE CM/SEC/SEC j.
SCALED INSTRUMENT RESP0NSE CM/SEC/SEC -
T)mo
^,< im
m-r*
(J1 ' CO
JOVIo
DISPLACEMENT CM
VELBCITY CM/SEC
COb
ACCELERATI0N CM/SEC/SEC -
CJO.o °
-om>7x
<>r~ C mCO
> nn mi
o(S>70 73m n-H
r>m So
O_
~ ^n fo x>nvj >m
m o1 * z oooCO
s_nzr mv.COm n
2 §
1° b u>o
oCO
CO
DISPLACEMENT 6 CM
VELOCITY CM/SEC
ACCELERATI0N CM/SEC/SEC
-o m7Z< >
If)
O K> 33 33m
> 2 R RS 7 §5» >BID NJ
m
o +:
mo-1-
roo-i> _>oo nr rn
toS
o
DISPLACEMENT CM
VEL0CITY CM/SEC
ACCELERATION CM/SEC/SEC cj
(Obj
T)m
m cp> n nmr
COP
NJ
o cs
m
,m
n +;
ron j> _>oo OP m
enmso o S -D Or- O
o to« M
n
os-v
DISPLACEMENT CM
VELBCITY CM/SECCD
b o
ACCELERATI0N^ CM/SEC/SEC >, p p b b 1______l______I
co ~~B *_ IS
to o_
St.
or~ "^
I 8m
00b
-in
(DJ-Cr-
COm n
COID
0)oo n3
OOfOo pb oCO"D
CO
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
ENTR
AL
CH
ILE
EGL,
3
/3/8
5.
22
:47
:07
UTC
. M
S-7
.8C
0NST
ltuC
I0N
. 6l
ILE
. V
ERTI
CAL
C0M
PUTI
NG
0PT
I0N
S- z
dR0S
S.£M
00T
HU
O).N
0N0I
SE
:c "
v
Cn
CO
O UJ
U) v r o u Q Q. r UJ D u.
oU
.
ID
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
R1E
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3
/3/8
5.
22
:47
:07
UTC
. M
S-7
.8C
0NS
TIT
UC
I0N
, C
HIL
E.
N0R
TH
-S0J
TH
C
0MP
UTI
NG
0P
TI0
NS
- Z
CR
0SS
,SM
00T
HU
O).
N0N
0IS
E
Cn
CM
O
HI
(/> r
o UJ
Q 13 a:
in *~t an
a u. (O
1.0
2.0
3.0
4.0
5
.0
FRE
QU
EN
CY
. H
Z
6.0
8.0
0.0
F0U
RIE
R A
MP
LITU
DE
S
PE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3
/3/8
5.
22
:47
:07
UTC
, M
S-7
.8C
0NS
T1TU
C10
N,
dllL
E.
EA
ST
-VE
^T
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
S.S
M00
TH
UO
).N
0N0I
SE
CO:c
4"
F.
T oi
o UJ o UJ
Q CL r a: UJ U.
U. Q
to
1.0
2.0
3.0
4.0
5.0
FRE
QU
EN
CY
. H
Z
6.0
7.0
8.0
9.0
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, MS-7.8
C0NSTITUCI0N. CHILE, N0RTH-S0UTH 0,2,540,20 PERCENT CRITICAL DAMPING
CJ LJ CD
CJ
iLCO
OL CO UJo:
o Q_iUJ>CD
0.04
X \MXl/f X X,\
0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI0D-SEC0NDS
A-58
PSEUD0 RELATIVE VELOCITY RESPONSE SPECTRA CENTRAL CHILE EQ., 3/3/85. 22:47:07 UTC. MS-7.8
C0NSTITUCION, CHIL£, VERTICAL 0,2,5,10,20 PERCENT CRI/ICAL DAMPING
CJ UJco
cj UJ CO~z.S> CL CO UJ
CJ SI 1 UJ
CD SI
0.04
x>X/fX XXXXXX XxXXX/ X\/ \/
\/Mx\/ \
0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERIOD-SECONDS
A-59
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, MS-7.8
C0NSTITUCI0N, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
oUJ
CJI
UJen
QL CO UJo:
CJ'
<S
UJ>CD (Si
0.04 0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-60
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE ECU 3/3/85, 22:47:07 UTC, MS-7.3
C0NSTITUCI0N, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
300
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NOS
7 11 15
A-61
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, MS-7.8
C0NSTITUCI0N, CHILE. VERTICAL 0,2.5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-62
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, MS-7.8
C0NSTITUCI0N, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
140
120 '-
100 -oUJen
oui eneaQ_ CO UJ
o
> 40 -
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-63
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake, 3/3/85 22:47:07 UTC, Ms-7.8
Hualane, Chile
DESCRIPTION COMPONENT
North-South Vertical East-West
Instrument Characteristics:
Frequency (Hz)
Damping (% Critical)
Filter Parameters:
Highcut (Hz)
Lowcut (Hz)
Peak Parameters;
Peak Acceleration, Unc. (ctn/s/s)
Peak Acceleration, A (cm/s/s)
Peak Velocity, V (cm/s)
Peak Displacement, D (cm)
Parameter Ratios:
|V/A| (sec)
|AD/V2 |
25.9
63.8
19.0
0.294
173.2
167.1
11.4
1.51
0.068
1.9
25.6
63.8
28.0
0.357
94.5
83.4
5.75
1.18
0.069
3.0
26.3
60.3
21.0
0.250
136.5
133.5
11.0
-2.39
0.082
2.6
A-64
S9-V
SCALED INSTRUMENTRESP0NSE
J. CM/SEC/SEC -
SCALED INSTRUMENT* RESP0NSE
£ CM/SEC/SEC 0 in cs b b
SCALED INSTRUMENTRESPONSE
J. CM/SEC/SEC - § §
T>m>7s -C°5>5rnz*> 3-m£
Qoo ^^^
- ""
CD<fOO
O*
mP> ^-^
c"?Par xi
o_
99-V
SCALED INSTRUMENT RESP0NSE
CM/SEC/SEC -
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC a,
SCALED INSTRUMENTRESP0NSE
J. CM/SEC/SEC -00 CD P 0
TJm
m.b.0
o*
CD O
CO
RR
EC
TED
AC
CE
LER
ATI
ON
. V
EL0
C1T
Y,
AND
DIS
PLA
CE
ME
NT
20
0.0
0 S
PS
C
EN
TRA
L C
HIL
E £
&.,
3/3
/85
, 2
2:4
7:0
7 U
TC,
MS
-7.8
HU
ALA
NE
, C
HIL
E^
N0R
TH-S
0UTH
P
EA
K V
ALU
ES
: A
CC
EL-
167.
14
CM
/SE
C/S
EC
, V
EL0
CIT
Y-1
1.42
CM
/SE
C,
DIS
PL-
1.51
CM
00
170.
-(CONTINUED)
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
42
44
48
48
50
52
54
56
58
00
82
84
68
88
-170.
12.0
-, (C0
NT1N
UED)
|pt|
y^/V
/tv^
^
'12-
° I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I42
44
48
48
50
52
54
58
58
60
62
64
68
68
70
72
74
76
78
80
1.60
-i
*1'60
(CONTINUED)
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
42
44
46
48
50
52
54
56
58
60
62
64
SEC0NDS
78
80
QL -V
DISPLACEMENT CM
VELBCITY CM/SEC
ACCELERATI0N CM/SEC/SEC
oca
2 ±_
a_
g_
a\ CO o>_mo O 01 Z oo O
O)o_
to
C0R
RE
CTE
D A
CC
ELE
RA
T10N
. V
EL0
C1T
Y,
AND
DIS
PLA
CE
ME
NT
200.0
0 S
PS
C
EN
TRA
L C
HIL
E E
&..
3/3
/85
, 2
2:4
7:0
7 U
TC,
MS
-7.8
HU
ALA
NE
, C
HIL
E.
EA
ST-
WE
ST
PE
AK
VA
LUE
S:
AC
CE
L-13
3.47
CM
/SE
C/S
EC
, V
EL0
C1T
Y-1
1.02
CM
/SE
C,
D1S
PL-2
.39 C
M
140.
-i
C9
U
o
-HO
. -1
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I2
4 0
8 10
12
14
10
18
20
22
24
28
28
30
32
34
38
38
40
12.0
-i
T
-12.
0 -1
's,1 y
y y
y2.
40 -
i
-2.4
0 J
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I 1
I I
I I
I I
I I
I I
I I
I I
2 4
6 8
10
12
14
16
18
20
22
24
26
28
30
32
34
38
38
40
SE
C0N
DS
ZL -V
DISPLACEMENT jo CM!h. oI______I
VELOCITY CM/SEC
ACCELERATI0NCM/SEC/SEC -.*.
p
_____I________I
Oes
2 ±_
S_
CO 01.m o
Oto
CD_
to:
Him"
OOlO
oCD.
o
CD__
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ.,
3/3
/85,
22
:47
:07
UTC
, M
S-7
.8H
UAL
ANE.
CHI
LES
N0R
TH-S
0UTH
C
0MP
UTI
NG
0P
T10N
S-
ZCR
0SS
,SM
00TH
(10)
,N0N
0IS
E F«
4'
CO
o UJ a) «v
r
o ul Q a. s:
< or UJ i i
or D csa a
CM
L0G
0F
FRE
QU
EN
CY
, HZ
F0U
R1E
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q.,
3/3
/85
. 2
2:4
7:0
7 U
TCf
MS
-7.8
HU
AIA
NE
, C
HIL
E,
VE
RT
ICA
L C
0MP
UTI
NG
0P
T10
NS
- Z
CR
0SS
,SM
00T
H(1
0),N
0N01
SE
Fc
o LU
CO r o UJ
Q LU
i-t cc U.
U.
Q
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85
, 22:4
7:0
7 U
TC.
MS
-7.8
HU
ALA
NE
. C
HIL
E,
EA
ST-
WE
ST
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
S.S
M00
TH
UO
I.N0N
0IS
E
e 4,
: 4
,4x1
01
o HI .
O u Q 0. r a: u.
a a
L0G
0F
FR
EQ
UE
NC
Y,
HZ
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3/3
/85,
22
:47
:07
UTC
. M
S-7
.8H
UAL
ANE.
CH
ILEV
N0R
TH-S
0UTH
C
0MP
UTI
NG
0P
T10N
S-
ZCR
0SS
.SM
00TH
(10)
.N0N
0IS
E
CO
o>
o
111
in V, o UJ
Q Q. r cc UJ t-4 o: ca
u. CO
8 10
FRE
QU
EN
CY
. HZ
12M
1618
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CEN
TRAL
CH
ILE
EQ..
3/3
/85,
22:4
7:0
7 U
TC,
MS
-7.8
HU
ALAN
E, C
HIL
E.
EA
ST-
WE
ST
C0M
PU
TIN
G 0
PT1
0NS
- ZC
R0S
S,S
M00
THU
O),N
0N0I
SE
oo
o UJ
O)
V. o UJ o Q. r a: UJ » <
Of
Q
U.
U. a
CM
10
FRE
QU
EN
CY
. HZ
1520
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85. 22:47:07 UTC, Ms-7.8
HUALANE, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
CJ UJen
CJ
illCO
Q_ CO UJ
>- I
CJ
UJ
CD
0.04 0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI0D-SEC0NDS
A-79
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
HUALANE, CHILE, VERTICAL 0,2.5,10,20 PERCENT CRITICAL DAMPING
uLU CO"s.
z:o iUJen
o_CO UJ01
CJ (S) I UJ
CDIS)
Xx_\xx/r x
0.04 0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-80
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EG., 3/3/85, 22:47:07 UTC, Ms-7.8
HUALANE, CHILE. EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
CJ LU CO
CJrLU CO
LiJ Cd
CJ<s I LU>
CD
0.04 0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI0D-SEC0NDS
A-81
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
HUALANE, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
250
200
oUl
150
(S)
LU CC
100CJ SJ
Ul
RV FAS
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-82
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
HUALANE. CHILE, VERTICAL 0,2.5,10,20 PERCENT CRITICAL DAMPING
80
70
60
oLU CO
OLU CO
enLU
50
40
53°
20
10
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-83
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC. Ms-7.8
HUALANE, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
160 r
140 E
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-84
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake, 3/3/85 22:47:07 UTC, M3»7.8
Iloca, Chile
DESCRIPTION
Instrument Characteristics:
Frequency. (Hz)
Damping (% Critical)
Filter Parameters:
Highcut (Hz)
Lowcut (Hz)
Peak Parameters:
Peak Acceleration, Unc. (cm/s/s)
Peak Acceleration, A (cai/s/s)
Peak Velocity, V (cin/s)
Peak Displacement, D (cm)
Parameter Ratios:
|V/A| (sec)
|AD/V2 |
COMPONENT
North-South Vertical
25.7 26.3
60.6 63-3
18.0 35.0
0.357 0.333
-207.0 90.9
-221 .3 85.3
9.34 5.70
-1.10 -1.20
0.042 0.067
2.8 3.2
East-West
24.7
60.0
18.0
0.333
275.7
272.9
15.1
1.37
0.055
1.6
A-85
98-V
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC wCOp
SCALED INSTRUMENT RESP0NSE
CM/SEC/SEC BS
SCALED INSTRUMENT RESP0NSE
CM/SEC/SEC
8.
CO CD
CO
m > 71
-O-H
n_ 3
IOCO.
.*- CD
m n
8^8P*<ro>tOmfoo ^a^o
~^P oom
(O>NJ^OP-^cg
§5o? ff33roi^ Njmxjes» 0>
o_
2,8-Y
SCALED INSTRUMENTRESP0NSE
,-, CM/SEC/SEC wCD 03 O O
CJIo_
CJIro_
CO cJim to_ o2 o)~~
O o_ CO
s_
SCALED INSTRUhCNT RESPONSE CM/SEC/SEC ««
SCALED INSTRUMENT RESPONSE CM/SEC/SEC ,0
o
to_
Ol O_
Olco__
m>/"s
<̂
.0-1
, m m"®coco m u
0)<ro>
oom
CD
IO_
xj
NJ CD.
88-V
DISPLACEMENT CM
VELOCITY CM/SEC
ACCELERATI0N CM/SEC/SEC
*o__
o_
-o m
c m in
ro 73o ro >m
O
m o
o
Ui iCr:-«:O( - m
Ro o "^ oCO P
n
o_
06-V
DISPLACEMENT CMCM/SECp»
COo
_J o
ACCELERATIONi CM/SEC/SEC CD a a> b b
___Ino m
2
1 ±_ m2 _
A a_m to
sm o
01KJ_
at o.
at 10
oo_
ato_
01IU_
g 8 S-*
"
o(3
s_
O)a.
S_
O) IU.
o_
to
NJ
CD O
C0_
OD0_^
£
m
sir Oo on
CO "0
ro on
o ab oto to
16-V
DISPLACEMENT CM
vELBcmrCM/SEC
ACCELERATION CD CM/SEC/SEC a, CD a a> oo o
1______I_______i
ro_
m > 7;
mCO
> n n mr i
00 Ol
CO
n cs
m o
m
n on 2 - mtom o
toIs7ro on
o*°oCO TJ CO
o_
CO
RR
EC
TED
AC
CE
LER
ATI
ON
, V
EL0
CJT
Y,
AND
DIS
PLA
CE
ME
NT
20
0.0
0 S
PS
C
EN
TRA
L C
HIL
E E
&-.
3/3
/85
, 2
2:4
7:0
7 U
TC,
MS
-7.8
R0
dA
. C
HIL
E,
EA
ST-
WE
ST
PE
AK
VA
LUE
S:
AC
CE
L-27
2.91
CM
/SE
C/&
EC
, V
^L0C
ITY
-15.
09 C
M/S
EC
, D
1SP
L-1.
37 C
M
(0
to
-28
0.
-J
10.0
-
2 «
e',o
' '»
' ',«
' '»
' ',.' 'd
-'d
'd
'd
'd
'3
0 'd
'd
'd
'd
'd
-ia.0
-
1.40
-|
'»'
'«'
'a'
'e1
V
'«'
',«'
',.' V
'd
'd
'd
'd
'd
'd
'd
'3
4'
'd 'd
I
a a
-1.4
0 -J
' .'''.'
'.o1
'»'
',«'
'd
'd
'dd
'd 'd
'3
4' 'd
'3
9'
SE
C0N
DS
DISPLACEMENT J. CM Mi. i. o o
I _.__! I
VELBCITY CM/SEC
ACCELERATION & CM/SEC/SEC MCD CD
o ea *
m o
03_
C7I
Ol IU
Ol
C7Ia.
en oT m eo_oG)"Z. a>o o.CO
a to.
CD
Cl O_
Cl (O
atjk__
Cla>_
at00_
a o_
a10
a>
CO
at
atCD-
CDo.
o to.
a
s_aCD__
s
§.
Q00.
>g O.
N O
N0)_
a o_
CD
CD.
00o.
CD KJ-
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CEN
TRAL
CH
ILE
EQ.,
3/3
/85
, 22:4
7:0
7 U
TC.
MS
-7.8
1L0C
A.
CH
ILE
, N
0RTH
-S0U
TH
C0M
PU
TIN
G 0
PT1
0NS
- ZC
R0S
S.S
M00
THU
OJ.
N0N
0IS
E
COFc
CO
o IU
O)
v.
O LJ
O Q. r LU k
-4 o: <a
u. u.
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E £
Q..
3/3
/85
, 2
2:4
7:0
7 U
TC,
MS
-7.8
IL0
dA
, C
HIL
E,
EA
ST-
WE
ST
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
S.S
M00
TH
(10)
.N0N
0IS
E
CO:c
4'r§
4' 4
'Fi
«o
en
o UJ
CO £ «
o UJ o a. r a:
o; 3 U.
~«U
.
(0
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
R1E
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ..
3/3
/85.
22:4
7:0
7 U
TC.
MS
-7.8
!L0b
A,
CH
ILE
, V
ER
TIC
AL
C0M
PU
TIN
G 0
PT1
0NS
- ZC
R0S
S.S
M00
TH(1
0),N
0N01
SE
01
CO
00
o UJ in o
u B i~i
OL or Ul
Q
U.
U.
Q (O
I
1020
FREQ
UEN
CY.
HZ
3040
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
IL0CA, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENt CRITICAL DAMPING
CJ LiJ CO^z:uiLU CO^. (S Q_ CO UJ
CJ
_I UJ>CD
0.04
\/yy\/ \
0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-100
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
IL0CA, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
uUJ CO
CJI
UJ CO
Q_ CO UJo:
CJ
1 UJ>CD
0.04
/ \/.\ \/ \/y\\/ \
5OO<\/ \/
0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-101
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
IL0CA, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
CJ UJco
CJI
Ld CO z.SI CLCO UJ
uSI I UJ
CD SI
0.04
/ X Xx.\>Xx X
0.1 0.2 0.4 124 10
UNDAMPED.NATURAL PERI0D-SEC0NDS
A-102
300
250 -
uj 200 -CO
UJen
O
150 -
100 -UJ>
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
IL0CA, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 . 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-103
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
IL0CA, CHILE. VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-104
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
IL0CA, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
400 c
350
300
250
oLUco*v. £. oLUcn
QL CO LUcr
5 150 si
100
50
0.0 0.5 1.0 -1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-105
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake, 3/3/85 22:47:07 UTC, Ms»7.8
Los Vilos, Chile
DESCRIPTION
North-South
Instrument Characteristics:
Frequency (Hz) 25.4
Damping (% Critical) 58.5
Filter Parameters:
Highcut (Hz) 20.0
Lowcut (Hz) 0.417
Peak Parameters:
Peak Acceleration, Unc. (cm/s/s) 36.9
Peak Acceleration, A (cm/s/s) 33.9
Peak Velocity, V (cm/s) -2.85
Peak Displacement, D (cm) -0.411
Parameter Ratios:
V/A| (sec) 0.084
|AD/V2 . 1.7
COMPONENT
Vertical
25.6
61 .5
22.0
0.357
19.5 -
19.8
-2.26
0.437
0.11
1.7
East-West
25.2
61 .2
20.0
0.345
25.8
24.5
2.83
0.487
0.12
1 .5
A-106
-V
SCALED INSTRUMENT RESP0NSE CM/SEC/SEC
SCALED INSTRUMENT RESP0NSE CM/SEC/SEC w
P P b b
SCALED INSTRUMENTRESP0NSE
^ CM/SEC/SEC tjVI VIb b
-0 m
LOC/5
ffliPS
~jom
m>
CO
RR
EC
TED
AC
CE
LER
AT
10N
. V
EL0
C1T
Y,
AND
DIS
PLA
CE
ME
NT
20
0.0
0 S
PS
C
EN
TRA
L C
HIL
E
E&
., 3
/3/8
5.
22
:47
:07
UT
C.
MS
-7.8
L0S
VIL
0S,
CH
1L£.
N0R
TH
-S0U
Trf
P
EA
K V
ALU
ES
: A
CC
EL-
33.9
1 C
M/S
EC
/SE
^C,
VE
L&
CIT
Y-2
.85
CM
/SE
C,
DIS
PL
-0.4
1 C
M
34.0
-z so 3
4,0
J1
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I2
4 6
8 10
12
14
16
18
20
22
24
20
28
30
32
34
30
38
4
0
42
44
40
48
5
0
O 00
2.90
H
-2.Q
O J
1 I
I I
I I
I I
It
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I2
4 0
8 10
12
14
16
18
20
2
2
24
26
28
30
32
34
36
38
40
42
44
40
48
5
0
0.4
2
-i
CO -«
a
-0.4
2 J
a
y 'J
y y
y y
y y
yy
yS
EC
0ND
S
601-V
DISPLACEMENTVEL0CITY CM/SEC
ACCELERATION ^ CM/SEC/SEC ,0P P b b-o
m>Tx<>r Cmto >n nmr ^^(Oboron
os7D7Dm0 H
<->s m0z>-HO5°>mOm 5^ «*»^^
"
OTI-V
DISPLACEMENT i CM o
o!
VELOCITY CM/SEC
ACCELERATION CM/SEC/SEC
COm o SoCO
§8? m<p* <
r-^rn ts* nm
10.
«oo m
en m o
COt)
CDfO O Ob o
(O00.(O
o
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3
/3/8
5.
22
:47
:07
UTC
, M
S-7
.8L0
S v
lL0
S,
CH
/LE
, V
ER
TIC
AL
C0M
PU
TIN
G 0
PT
I0N
S-
ZC
R03
s,S
M00
TH
(5),
N0N
0IS
E
o UJ in **,
x:
o U
J o a. 3: LU »
Ct
Z) a
u.
ou. a
I I
I I
0 1
L0G
0F
FR
EQ
UE
NC
Y,
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT
I0N
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85
, 22:4
7:0
7 U
TC,
MS
-7.8
L0S
V1L
0S,
CH
ILE
, E
AS
T-W
ES
T
C0M
PU
TIN
G 0
PT
I0N
S-
EC
R0S
S,S
M00
TH
(5),
N0N
0IS
E
o UJ in̂ o UJ
Q D Q. r
a: UJ >-» K. a
u. (O a
L0G
0F
FR
EQ
UE
NC
Y,
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT
I0N
C
EN
TRA
L C
HIL
E E
Q.,
3/3
/85
, 22:4
7:0
7 U
TC.
MS
-7.8
L0S
V1L
0S,
CH
IL£,
N0R
TH
-S0U
Trf
C
0MP
UT1
NG
0P
TI0
NS
- Z
CR
0SS
,SM
00T
H(5
),N
0N0I
SE
:e V
o UJ in *** o
u Q I-
» «
Q.
UJ
t I on Q u. u.
10
FRE
QU
EN
CY
. H
Z
152
0
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85
. 2
2:4
7:0
7 U
TC,
MS
-7.8
L0S
V11
0S,
CH
ILE
, E
AS
T-W
ES
T C
0MP
UTI
NG
0P
TI0
NS
- Z
CR
0SS
,SM
00T
H(5
),N
0N0I
SE
i
o>
o UJ O)
V. o
u B UJ u. u.
GJ (O
10
FRE
QU
EN
CY
. H
Z
152
0
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
L0S VIL0S, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
cj L±J en
o L±J en
CLcnLiJ
u I LU>CD
-1
0.04 0.1 0.2 0.4 124 10 20
UNDAMPED NATURAL PERI0D-SEC0NDS
A-117
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85. 22:47:07 UTC, Ms-7.8
L0S VIL0S, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
uUJen\z:oiUJen
0.enUJ
oQ_i LU>
CD
-1
0.04 0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-118
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
L0S VIL0S, CHILE, EAST-WEST . 0,2,5,10,20 PERCENT CRITICAL DAMPING
uUJ CO
cjI
LJcn siQ_cn LJ
CJ SI IUJ>CD
-1
0.04 0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI0D-SEC0NDS
A-119
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
L0S VIL0S, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-120
25
20
o ui
oUJ V)
(S3QLcnUJtr
o
UJ>
15
10
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
L0S VIL0S, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.0 0.5 1.0 1.5 2.0 2.5 3.0 7 11 15UNDAMPED' NATURAL PERI0D-SEC0NDS
A-121
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
L0S VIL0S, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-122
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake, 3/3/85 22:47:07 UTG, M -7.8
o
Melipilla, Chile
DESCRIPTION
Instrument Characteristics:
Frequency (Hz)
Damping (% Critical)
Filter Parameters:
Highcut (Hz)
Lcwcut (Hz)
Peak Parameters:
Peak Acceleration, Unc. (cm/s/s)
Peak Acceleration, A (cm/s/s) "
Peak Velocity, V (cm/s)
Peak Displacement, D (cm)
Parameter Ratios:
V/A (sec)
AD/V2
COMPONENT
North-South Vertical
25.0 26.0
62.3 57.7
22.0 32.0
0.133 0.270
-641.6 27^.3
-673.0 -249.9
34.2 -11.8
12.0 -2.81
0.051 0.047
6.9 5.0
East-West
25.0
59.4
24.0
0.200
509.8
518.1
40.3
6.03
0.078
1.9
A-123
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC o
SCALED INSTRUMENTRESPONSE
t> CM/SEC/SEC w00 00o p
SCALED INSTRUMENTRESPONSE
i CM/SEC/SEC oj 01 en o o
~Drn
cr-.
s^no
mmm
ro om
»m>
SCALED INSTRUMENT RESP0NSE
CM/SEC/SEC 01
CO
Oln
01ro
01CO «- m nIS 01z »- oCO
O)o_
O)
s
SCALED INSTRUMENTRESP0NSE
& CM/SEC/SEC w00 CD
SCALED INSTRUMENTRESPONSE
o, CM/SEC/SEC o,01 en o p
"0m
mmm n*
com>
O
931-V
DISPLACEMENT CM
VELOCITY CH/SEC
ACCELERATI0N CM/SEC/SEC
TJ m
C m
n n m
o cs
m o
.m
n
rn no S < . in o? o
- S b w (Ort
-V
IDb
DISPLACEMENT CM
VEL0CITY CM/SEC
ACCELERATION CM/SEC/SEC
00o
-» IO
2 ±_
O)_CD_
00_00_00
OiO
Olo_
Ulro
Ulto_
to ea rn n s 01 Z CD. OenO)
Cl CO
a o
CD ro
oCO.
V 0_
Ul00_
oO
o
CO
6ZT -V
DISPLACEMENT CM
COo
VEL0CITY CM/SECrj
b
ACCELERATI0N CM/SEC/SEC
3o
-4 IO__
g ±_
oG> *
I O
a_
O1 Ol
CT M
CTm ~~
n S (712 c° Oto CD
o_
re
n
O)u_
O)
o d_
o00_
No_
>JfU
>J o_
>JQ$nfm
n
CO
ISI-V
p o
DISPLACEMENT CM
VEL0CITY CM/SEC
ACCELERATI0N CK/SEC/SEC
o p_l l_o ___Z «>.-H IO_
CD_O_
com oS"Z.oCO
0_
tn NJ_
OI
O)o_
Ol 00
oO
CD
O)o_
01 fO_
O)CD_
CDCD-
Oro_
10 oTOm7s
< >O
sm *> H> m> 2 n ma s° r- Z> to
2 5G 00>mo r-,mCD £;o __ « 1> P3^-1 2-mrn *»vp- Qtn«mz m~op»
r«i f.>rn
Pn^OSP.-5 r-m -s" ^> nmI9z n^-^-o?^5°
pses u>^5> w-'no n " m
^ to[n c/) z m NJ-IP boroo 8LO -DO
O
tn O) TOb wCO
F0U
R1E
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85
. 22:4
7:0
7 U
TC.
MS
-7.8
ME
LIP
ILLA
. C
HIL
E*.
N0R
TH
-S0U
Ttf
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
S.S
M00
TH
UC
O.N
0N0I
SE
CO to
o LU
U) o UJ o Q. a: UJ (a
u. u.
csa o
a
CM
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85
, 2
2:4
7:0
7 U
TC,
MS
-7.8
ME
LlP
llLA
, C
HIL
E.
EA
ST-
WE
ST
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
S,S
M00
TH
(10)
,N0N
0IS
E
CO"c
H'
GO
o UJ o LJ
Q OL r a: .
Q
U.
U.
(9 CD
(M
L0G
0F
FR
EQ
UE
NC
Y,
HZ
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3/3
/85,
22:4
7:0
7 U
TC.
MS
-7.8
ME
LlP
lLlA
. CH
ILE*
. N
0RT
H-S
0UT
tf C
0MP
UTI
NG
0P
T10
NS
- ZC
R0S
S,S
M00
TH12
0),N
0N01
SE
:t H
'
CO
Ctt
u UJ
U) ^ u UJ o 01
UJ
> I en Q
U.
U.
10
FREQ
UEN
CY.
HZ
1520
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3
/3/8
5.
22
:47
:07
UTC
, M
S-7
.8M
EL1P
1LLA
, C
HIL
E.
EA
ST-
WE
ST
C0M
PU
TIN
G 0
PT
10N
S-
ZCR
0$S
.SM
00TH
(20)
,N0N
01S
E
Fc CO
CO
o UJ
O)
'X o
ul Q Q. r oc UJ
»-4 a: to IS)
I 10 FR
EQ
UE
NC
Y.
HZ
1520
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ. f 3/3/85, 22:47:07 UTC, Ms-7.8
MELIPILLA, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
uLU CO
oI
LU CO
CL CO LUo:
u IS I LU>CD
0.04
\/ \/ \/>
0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-138
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
MELIPILLA, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
uUJ CO
CJ illcn
Q_ CO LU CcL
UJ>CD
0.04 0.1 0.2 0.4 124 10 20
UNDAMPED NATURAL PERI0D-SEC0NDS
A-139
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
MELIPILLA, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
uLU
CJI
UJen
CL (/)UJo:
CJo_J UJ>CD
0.04 0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-140
500
400
oLU
q 300LU
Q_
LU
£ 200 u
100
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EG., 3/3/85, 22:47:07 UTC, Ms-7.8
MELIPILLA, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
RV FAS
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-141
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
MELIPILLA, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
120
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-142
500
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
MELIPILLA, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 1.5 2.0 2.5 3.0 3 7 11 15 UNDAMPED NATURAL PERI0D-SEC0NDS
A-143
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake, 3/3/85 22:47:07 UTC, Ms-7.8
Pichilemu, Chile
DESCRIPTION
North-South
Instrument Characteristics:
Frequency (Hz) 26.4
Damping (% Critical) . 58.8
Filter Parameters:
Highcut (Hz) 23.0
Lowcut (Hz) 0.167
Peak Parameters:
Peak Acceleration, Unc. (cm/s/s) 259.7
Peak Acceleration, A (cm/s/s) 254.1
Peak Velocity, V (cm/s) -11.7
Peak Displacement, D (cm) 3.74
Parameter Ratios:
|V/A| (sec) 0.046
|AD/V2 | 6.9
COMPONENT
Vertical
26.5
58.5
22.0
0.200
-122.1
-119.3
-5.84
-1.86
0.049
6.5
East-West
25.5
58.2
27.0
0.172
-183.6
-175.3
12.5
4.08
0.071
4.6
A-144
SCALED INSTRUMENTRESP0NSE
J. CM/SEC/SEC -8
<D P
SCALED INSTRUMENTRESP0NSE
i CM/SEC/SEC ~ g 8
SCALED INSTRUMENTRESPONSE
& CM/SEC/SEC v a a>
o_
m >
cm.cnp, n
-V
SCALED INSTRUMENTRESPONSE
J. CM/SEC/SEC - 8 §
w ,oo_JL
U)p
CD_i_
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC -£p w *
eo_l_
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC ,0CD O
coO
CO O_
(Oro
m O
to »o_
T)m >
cm: mirs (/>c;
m x o o.
oCO
00_
Ol
Ol NJ_
CO00_
0_sisg
oocn
GO_
i;
, :
\l
C0R
RE
CT
ED
AC
CE
LER
AT
10N
, V
EL0
C1T
Y,
AND
DIS
PLA
CE
ME
NT
20
0.0
0 S
PS
C
EN
TRA
L C
HIL
E E
&..
3/3
/85
, 2
2:4
7:0
7 U
TC,
MS
-7.8
PIC
HIL
EhU
, C
HIL
£, N
0RT
H-S
0UT
tf P
EA
K V
ALU
ES
: A
CC
EL-
254.
12 C
M/S
EC
/s£
c, V
EL
0C
ITY
-H.6
8 C
M/S
EC
, D
ISP
L-3
.74 C
M
260.
-i
-260.
-J
12.0
-i
-12.
0 J
3.80
-i
-3.8
0 J
I I
I I
I I
I I
I I
till
2
4 '
6
8
10
12
14
16
18
20
2
2
24
26
28
SE
C0N
DS
-V
DISPLACEMENT CM
VELOCITY CM/SEC
ACCELERATI0N CM/SEC/SEC
uro COro_
o ca
m O
m
i
n n m
ro 01 .u
nIS 20
so m o
CD m
IS
o en
CJO)
0_O_
to
CO VI
o ob oin"0in
Olo_
Olo.
Olo_
n
Ol IU
Olto
OlO
051-V
DISPLACEMENT CM
CD O
en<oo
VEL0CITY CM/SEC
toO
too
ACCELERATI0N CM/SEC/SEC ~
fiO
toCD_
to00_
CO
O CO
o_
oo_
n PS
en01
Ol10 0110.
O)a> en
o.
TST-V
DISPLACEMENT CM
VELBCITYCM/SEC
ACCELERATI0N CM/SEC/SEC -
8
>m
i-rrL,'S" ^> om^z *-;>-b-o?2->s »--^.Nja5
n
tn mP bio
3 §§ 8o00n
ZST-V
DISPLACEMENT CM
VEL0CITY CM/SEC
ACCELERATI0N CM/SEC/SEC -
CD O
NJ . CO_L
O E)
CJto_
CO
Oen
0_
0_
t)m
O
CD
CD_
CD
01O
CD fO
a "X
r- C m c
n n m
Ol
n 030 a m n-H
5m?D
O2 -v COm n
o to
oo n
oro
8
Olo
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3/3
/85,
22:4
7:0
7 U
TC.
MS
-7.8
P1C
HIL
EM
U,
CH
ILE
, N
0RT
H-S
0UT
rf
C0M
PU
TIN
G 0
PT
J0N
3-
ZC
R0S
S.S
M00
TH
110I
.N0N
0IS
E
c 4
,"»
"4*
4^1
Cn CO
o UJ en Vs. E-
O U
Q Q. r UJ
*-t
C£ S
U.
U.
Q to
L0G
0F
FR
EQ
UE
NC
Y,
HZ
F0U
R1E
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3
/3/8
5,
22
:47
:07
UTC
, M
S-7
.8P
ICH
ILE
MU
, C
HIL
E,
VE
RTI
CA
L C
0MP
UTI
NG
0P
TJ0
NS
- ZC
R0S
S.S
M00
TH(1
0).N
0N0I
SE
<M:e
4"
i i
i i
01
O UJ in *** o 0. r or
u
» »
on CD
L0G
0F
FR
EQU
ENC
Y, H
Z
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CEN
TRAL
CH
ILE
EQ..
3/3
/85
. 2
2:4
7:0
7 U
TC.
MS
-7.8
PIC
HlL
EhU
, C
HIL
E,
N0R
TH-S
0UTr
f C
0MP
UTI
NG
0P
T10
NS
- ZC
R0S
S.S
M00
THU
OJ.
N0N
0IS
E
Fci
CO
01 0>
O iu
to v.
O UJ
O i « a! r or UJ
1-4 OL IS
U
.
U.
Q O
CM
1 1
1 1
1 1
1
) 5
iiliiiilii
10
15
FRE
QU
EN
CY
. H
Z
1
, ,
I ,
.20
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CEN
TRAL
CH
ILE
EQ
., 3
/3/8
5,
22:4
7:0
7 U
TC,
MS
-7.8
PIC
H1L
EMU
, C
H/L
E,
VE
RTI
CA
L C
OM
PUTI
NG
0P
T10
NS
- ZC
R0S
S,S
M00
TH(1
0),N
0N0I
SE
Ol
Fcl
CM
o UJ
CO ^v o UJ a D QL
UJ
»
t CC ca
u. (D
10
FRE
QU
EN
CY
, HZ
152
0
F0U
R1E
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3/3
/85.
22
:47
:07
UTC
. M
S-7
.8P
ICH
ILE
MU
, C
HltE
. E
AS
T-W
ES
T C
0MP
UTI
NG
0P
T10
NS
- ZC
R0S
S.S
M00
TH(1
0),N
0N0I
SE
1'
Ol
OO
O UJ
</> " x O ul O 3 Q. r UJ
t-4 Ol
Q
IL LL
CM
10
15
FRE
QU
EN
CY
, HZ
2025
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EGL, 3/3/85, 22:47:07 UTC, Ms-7.8
PICHILEMU, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
uUJ
CJi
LJ CO
CL CO LJ
u I UJ>CD
0.04 0.1 0.2 0.4
UNDAMPED NATURAL
124 10 PERI0D-SEC0NDS
A-159
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
PICHILEMU, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
ollJ
CJiLU CO
CL enUJ
>-h- iCJ
_i UJ
CD
0.04 0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI0D-SEC0NDS
A-160
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
PICHILEMU. CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
cjLd CO \z:cj iLd CO
Q_ CO Ldo:
u s_I LU>CD
0.04 0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-161
250
200 -
oUJto*v
LUto GJ0.toLUIX
150 -
100 -CJ
LU
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
PICHILEMU, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-162
70
60
oUJen" s.
31 O
uen
50
40
CLcnUJ* 30
» o
> 20
10
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
PICHILEMU, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
RV FAS
0.0 0.5 1.0 ;, 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-163
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
PICHILEMU, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
100
oUJ CO
oUJen
a.Crt
cc
u(SI
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-164
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake, 3/3/85 .22:47:07 UTC, Ms-7.8
Quintay, Chile
DESCRIPTION
Instrument Characteristics:
Frequency (Hz)
Damping (% Critical)
Filter Parameters:
Highcut (Hz)
Lowcut (Hz)
Peak Parameters:
Peak Acceleration, Unc. (cm/s/s)
Peak Acceleration, A (cm/s/s)
Peak Velocity, V (cm/s)
Peak Displacement, D (cm)
Parameter Ratios:
|V/A (sec)
|AD/V2 |
COMPONENT
Longitudinal Vertical Transverse
26.2 24.8 25.1
60.0* 60.0* 60.0*
30.0 32.0 30.0
0.250 0.286 0.217
231.5 -162.9 -240.3
231.5 180.9 255.0
12.5 -6.08 -19.3
2.80 -1.19 -3-50
0.054 0.034 0.076
4.1 5.8 2.4
Nominal Value
A-165
991 -V
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC Mo
o_
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC -
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC M
ro
CDCO
0_
m
m" m
m
o
19T-V
SCALED INSTRUMENT RESP0NSE
CM/SEC/SEC MCJIo
SCALED INSTRUMENTRESP0NSE
J. CM/SEC/SEC - Nl Nl P O
IU_
SCALED INSTRUMENT RESP0NSE
CM/SEC/SEC to
t 2_ Hj '
_"~
f OB . <
t S_
? CD~r °
u O3"" ^ S[ co^ J co > *
o o"~0. 0.
^
!
1
-
-D m^° j£n>55k-<? R"^5=0m" m
rncs
im
02,1-V
DISPLACEMENT CM
VEL0CITY CM/SEC
ACCELERATI0N J. CM/SEC/SEC 8
a
O
T)m
r- nC Qm S3tn TOm> n
m
-«r>00 JDoo >m(Oo n^n 5:
m
.
m
ROOfO
7
n
o
UT-V
DISPLACEMENT CM
en o_
VEL0CITY CM/SEC.
8ACCELERATI0N
CM/SEC/SEC - 8
m9 en"
O_
cnm o
Ul fO_
n
g_
r=\ °> O 0>__(fl
p-xjco
en
ID O
JOto o
DISPLACEMENT CM
VEL0CITY CM/SECISJ
A.
o_o_
»o_
ACCELERATI0NCM/SEC/SEC ,0
A. p
o>
CD
CJ1
CO ffl-m
§ tLOCO iu
ru.
10O.
SL.
00
o_O
ZLl-V
DISPLACEMENT ro CM jub £ o oi j _______I
VEL0CJTY CM/SEC
ACCELERATION CM/SEC/SEC
01O_
*j_
en
m o> n u- z. oCO
VJ NJ.
CD__
O
CJI
CJI
o> ro.
O
Vjto.
CD_
O)O
O)ro_
00
Mf
Jn0z-H
1
g
~Dm>7\
<£ °P EJm ^» a ^ ° > iG n1^a fi° «~ 2>
1 «n w X)n u >m r^ f~p-01 (-.m^ OX
nOp>2Cm^ N.t= StoZmz mr'c^C5" < 5J- «pni«R
t oo"-m̂^^
SSsk ^2^°-<-» o i po^^i^^S J5Z5> _.t nn n rn y
22"> fzR >5
ODfNj0 0*"^ f^cn H"° 2 r- O
g
fO W T) 00 tno wn3
CDro.
00
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3/3
/85.
22:4
7:0
7 U
TC.
MS
-7.8
QU
INTA
V.
CH
ILE
, L0
NG
1TU
DIN
AL
C0M
PU
TIN
G 0
PT
10N
S-
2CR
0SS
.Sn0
0TH
(10)
.N0N
0IS
E
T
O LU
(/> x r
o ul
Q (L r or
LU on UL
U.
CM
L0G
0F
FREQ
UEN
CY.
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q.,
3/3
/85
. 22:4
7:0
7 U
TCr
MS
-7.8
QU
lhftA
Y,
CH
ILE
, V
ER
TIC
AL
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
S.S
M00
TH
(10)
.N0N
0IS
E
Fe
en
O u U)
**+ r
P UJ
Q Q.
31
< o: UJ i
o: ID
C3
U. to
a
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
R1E
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3
/3/8
5,
22:4
7:0
7 U
TC,
MS
-7.8
QU
INT
AY
. C
HIL
E,
TRA
NS
VE
RS
E
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
S.S
M00
TH
(10)
.N0N
0IS
E
o UJ in *^ o UJ § Q. r UJ » t OL u.
<a (O
CM
L0G
0F
FR
EQ
UE
NC
Y,
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3
/3/8
5,
22:4
7:0
7 U
TC,
MS
-7.8
QU
INT
AV
. C
HIL
E,
L0N
GIT
UD
INA
L C
0MP
UTI
NG
0P
TI0
NS
- Z
CR
0SS
,SM
00T
H(2
0),N
0N0I
SE
O
UJ u
o OL
UJ
^~t
OH u.
u. is
1015
FRE
QU
EN
CY
. H
Z
20
25
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85
. 2
2:4
7:0
7 U
TC,
MS
-7.8
QU
IN^A
Y.
CH
ILE
, V
ER
TIC
AL
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
5,S
M00
TH
(20)
,N0N
01S
E
cj
00
o UJ to V. u o C
L r LU t-4 or GJ
u. u. (3 to (3
I10
20
FRE
QU
EN
CY
. H
Z
30
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
ATI
ON
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85,
22
:47
:07
UTC
, M
S-7
.8Q
UIN
TAY
. C
HIL
E,
TRA
NS
VE
RS
E
CO
MPU
TIN
G 0
PT
10N
S-
2CR
0SS
.SM
00TH
(20)
,N0N
01S
E
Fc
sJ/
to
o UJ
U)
*v» o UJ o or GJ
U.
O
CM
10
15FR
EQ
UE
NC
Y,
HZ
2025
30
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
QUINTAY, CHILE, TRANSVERSE 0,2,5,10,20 PERCENT CRITICAL DAMPING
CJ LU
U tLU COzS3 Q. CO LU
CJ S3 _ I LU
CDS3
0.04 0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI0D-SEC0NDS
A-180
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
QUINTAY, CHILE, L0NGITUOINAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
uLU CO
CJ
LUcnzS) CLenLU
S)_I LU>
CD S)
0.04 0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NOS
A-181
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
QUINTAY. CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
cjLU CO
CJ i
Lul CD
Q_ CD'UJ
>-I
CJ
LU
CD
0.04 0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-182
uLU CO
120
100
80
LU CO
a.COLUce
u siLU>
60
40
20
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
QUINTAY, CHILE, L0NGITUDINAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
RV FAS
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-183
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
QUINTAY, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-184
160
140 :
120 ~-
31 Oill (/>z si o_ (ftUJcc
o sUJ>
100 '
VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
QUINTAY, CHILE, TRANSVERSE 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-185
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake of 3/3/85 47:07 UTC, MS «
Rapel, Chile
22:47:07 UTC, Ms-7.8
DESCRIPTION COMPONENT
North-south Vertical East-west
Instrument Characteristics:
Frequency (Hz)
Damping (% Critical)
Filter Parameters:
Highcut (Hz)
Lowcut (Hz)
Peak Parameters:
Peak Acceleration, Unc. (cm/s/s)
Peak Acceleration, A (cm/s/s)
Peak Velocity, V (cm/s)
Peak Displacement, D (cm)
Parameter Ratios:
V/A (sec)
AD/V2
Nominal Value
17.8
60.0'
17.0
0.154
0.047
6.4
19.0
60.0 :
26.0
0.263
0.070
3.0
18.3
60.0*
17.0
0.200
226.2
219.2
-10.4
-3.14
63-. 3
61.3
-4.29
.890
89.5
87.6
6.06
-1.71
0.069
4.1
A-186
181-V
SCALED INSTRUMENTRESPONSE
i CM/SEC/SEC o
b b ____I
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC »
10
0>
0>
10
8.
O
SCALED INSTRUMENTRESPONSE
& CM/SEC/SEC wG) OO p
1______
O_
m>
cnm1 rn* m
w==*"o
oom
881-V
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC o
b
o_
si01
w03_
O) M
03a_
SCALED INSTRUMENT RESP0NSE CM/SEC/SEC a
SCALED INSTRUMENT RESPONSE CM/SEC/SEC 10
O _
| «_i » " m f)
8 *-
o
Ul IO
ai CD_
CD o
a
m
cnmi
g_
ao o
ooG6
xr»MM
>4 00_
00O
03 V~-
OB O
0,253
tn
681-V
DISPLACEMENT CM
VEL0CITY CM/SEC
ACCELERATION CM/SEC/SEC
too_
NJ W_
o
O
_J
TJ m
c m en
nnP 8°
ro0
(D_ 00 - m
in R
cu
O
ooro oOb OO)
061-V
DISPLACEMENT CM
IUo
VEL0CITY CM/SEC
ACCaERATIBN CM/SEC/SEC
g-
§
COm O CB
O
O _
I *-
o ° Ol"~
en
o>
si
so >/""
oo o_
s
s
t 3 «_
sCT CD
S
00"
8_co"~
> 7;<>
m
>
mi
ro
roo
n
»m
>m
_on ' rn
m n
en
CJ
n2
coro o ob oen o en
T6T-V
vELBcmrCH/SEC
ACCaERATMN i CM/SEC/SEC o>
b b l______i______I
N>
no rn
c m
> n n mr i
CD
O
m o
n »-:
r-nr J
m
ror- cr(O
en mno c/i
p b(On
o ob oen no en
CD
C0R
RE
CT
ED
AC
CE
LER
AT
I0N
. V
EL0
CIT
Y,
AN
D D
ISP
LAC
EM
EN
T 2
00.0
0 S
PS
C
EN
TRA
L C
HIL
E E
Q.,
3/3
/85,
22
:47
:07
UTC
, M
S-7
.8R
Af%
L. C
HIL
L V
ER
TIC
AL
PE
AK
VA
LUE
S:
AC
CE
L-61
.32
CM
/SE
C/S
EC
, V
EL
0C
ITY
-4.2
9 C
M/S
EC
, D
ISP
L-0
.89
CM
62.0
n (
CO
NTI
NU
ED)
to -02.0 J'^
/Ifi
^fJ
^^
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
48
50
52
54
50
58
00
02
04
00
08
70
72
74
70
78
80
82
84
80
88
00
92
4.30
_. (C
ONTI
NUED
)
o
\AA\
/AV/\
V^W
^
4-3°
J I
I I
I I
I I
I48
50
52
54
.'J
U
0.00
-
-0.0
0 J
(CO
NTI
NU
ED)
y y
y y
y y
yy
y y
y y
y y
yS
EC
0ND
S
S6I-V
DISPLACEMENT CM
VELOCITY CH/SEC
ACCELERATION CM/SEC/SEC
-0 m
c m co
o n m
o
70m o <
-m
55
m
s -
a o^ 1=5 oco o? s i O
I»- to X| "T> ^- 03n
C0R
RE
CT
ED
AC
CE
LER
AT
10N
. V
EL0
C1T
Y,
AN
D D
ISP
LAC
EM
EN
T 200.0
0 S
PS
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85.
22
:47
:07
UTC
, M
S-7
.8R
AP
feL.
CH
IL£,
EA
ST-
WE
ST
PE
AK
VA
LUE
S:
AC
CE
L-87
.61
CM
/SE
C/S
EC
, V
EL
0C
ITY
-6.0
6 C
M/S
EC
, D
ISP
L 1
.71
CM
89.0
_ (
CO
NTI
NU
ED)
SS 2$ <j£ og
- Y^N
fW^t
*^^
88.0
-J
, , ,j
, ,
| I
| j
,|
, ,
|J
| ,
!8J g
'e1̂ g
g g
g
(O
8.10
-.(
CO
NTI
NU
ED
)
o 8-!°
1111
1111
1111
1111
1 j 1
1148
50
1y
y y
y y
y y
1.80
n
S <5 a -1
.80
J
CC0N
T1NU
ED)
y y
y y
y y
y y
y y
yy
y y
y y
y y
yS
EC
0ND
S
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EG
L. 3
/3/8
5.
22
:47
:07
UTC
, M
S-7
.8R
AF*E
L, C
HIL
E.
VE
RTI
CA
L C
0MP
UTI
NG
0P
T10
NS
- ZC
R0S
S,S
M00
TH(1
0),N
0N0I
SE
CM:c
4"
:n 4
-- 4^
1
CD
Oi
O LU
U) x. O ul Q D t-t
OL (£
LU 1-4 a: Q
u. LL (9 o
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
R1E
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
CENT
RAL
CHILE
EQ.
, 3/3
/85,
22:
47:0
7 UT
C, M
S-7.8
RA
PEL,
CHILE
", EA
ST-W
EST
C0M
PU
TIN
G 0
PT
I0N
$» Z
CR
0SS
.SM
00T
H(1
0),N
0N0I
SE
i
T M to
O UJ
O ui Q
D i i
CL 3C or UJ i-t 01 U.
C9
(0
L0G
0F
FR
EQ
UE
NC
Y,
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
TI0N
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85
, 22:4
7:0
7 U
TC.
MS
-7.8
RAP^
EL,
CH
ILE
, V
ER
TIC
AL
C0M
PU
TIN
G 0
PT
10N
S-
ZCR
0SS
.SM
00TH
(10)
,N0N
0IS
E
T h-«
(O to
Fcv
l CM
o in 10 o UJ
Q Q. r a:
LU u.
u. to
1015
2025
FREQUENCY. HZ
F0UR
1ER
AMPL
ITUD
E SP
ECTR
UM 0
F AC
CELE
RAT1
0N
CENT
RAL
CHILE
EQ.
. 3/3
/85,
22:
47:0
7 UT
C, M
S-7.
8RA
PEL.
CHILE
", EA
ST-W
EST
C0MP
UTIN
G 0P
T10N
S- Z
CR0S
S.SM
00TH
(10)
.N0N
0ISE
to
o
o
o UJ
tO o LU £L r
a: UJ » i
<£
G> a.
u. (3 CO
(3
8 10
FREQ
UEN
CY,
HZ
1214
16
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
RAPEL, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENf CRITICAL DAMPING
uUJ CO
cjUJ CO
DLCO UJ
CJ IS_ I UJ
CD IS
0.04 0.1 0.2 0.4 124 10 20
UNDAMPED NATURAL PERI0D-SEC0NDS
A-201
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
RAPEL, CHILE. VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
CJ UJ CO
CJI
UJ CO
Q_ CO UJ
CJs I UJ>CD
V v \ y / V Ax. X AA / A
\/ \/xx\/\
0.04 0.1 0.2 0.4 124 10 20 UNDAMPED NATURAL PERI0D-SEC0NDS
A-202
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EGL. 3/3/85, 22:47:07 UTC, Ms-7.8
RAPEL, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
u LUCO
CJI
LU CO2: is a. enUJ
u & 1 UJ
CD SI
0.04 0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-203
140
120 :
100 -uUJ CO>s.
o illCO
a. enLJ
o siLU>-
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
RAPEL, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-204
50
40
oUJ CO
O
UJ CO
Q_ CO UJo:
o
UJ>
30
20
10
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
RAPEL, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
RV FAS
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-205
CO
oillCO
o
60
50
40
30
20
10
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
RAPEL, CHILE, EAST-WEST 0,2.5,10,20 PERCENT CRITICAL DAMPING
RV FAS
i i i i i t i
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-206
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake, 3/3/85 22:47:07 UTC, M3»7.8
San Fernando, Chile
DESCRIPTION
Instrument Characteristics:
Frequency (Hz)
Damping (% Critical)
Filter Parameters:
Highcut (Hz)
Lowcut (Hz)
Peak Parameters:
Peak Acceleration, Unc. (cm/s/s)
Peak Acceleration, A (cm/s/s)
Peak Velocity, V (cm/s)
Peak Displacement, D (cm) »
Parameter Ratios:
|V/A| (sec)
|AD/V2
COMPONENT
North-South Vertical
25.9 27.7
67.4 60.8
23.0 37.0
0.250 0.333
275.1 121.2
285.1 119.1
24.5 9.03
-4.23 2.02
0.086 0.076
2.0 3-0
East -West
25.6
63.8
22.0
0.196
329.8
332.8
-23.9
-5.51
0.072
3.2
A-207
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC oU)o
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC -
8
SCALED INSTRUMENT RESPBNSE
CM/SEC/SEC ,0
8
COm o
OCO
o_
men
10to.
10 Q.
to00.
CO
(O 00.
0_
m _- sGlcog **
o_
60S-V
SCALED INSTRUMENTRESPONSE
CM/SEC/SEC wuo
SCALED INSTRUMENTRESPONSE
J. CM/SEC/SEC - 8 8
SCALED INSTRUMENTRESPONSE
& CM/SEC/SEC ,0CD CD O O
CO_
men
m
£ » m CD. n
o o.CO
CD O.
s.
mCO
oiz-v
DISPLACEMENT CM
VELBCmr CM/SEC
ACCELERATI0N CM/SEC/SEC
-0m
Cm en> 0
ro g
SS
m o
NJ I
COno
to
n
o o o oen no CO
o_
TT2-V
DISPLACEMENT CM
VEL0CITY CM/SEC
ACCELERATI0N CM/SEC/SEC
o is
(OpTJ
m
m
n n
o
m o
rn eo_ n
CJI
f\J
g§03
Z. o>o o. to
O)ro.
oo_
o ro_
CD 00_
0_
U) i Zm NJ «P bro2 8
8
ro
>j
U)o
00ro.
ziz -v
DISPLACEMENT CM
VEL0CITY CH/SEC
ACCELERATION CM/SEC/SEC
0rn
> f">^^ ^Dm 20 co m
n> -j
mmo-
rnrr r
m n
cx>ro 3 O
Irob ron
o oCO-oCO
SIZ-V
jo o i
DISPLACEMENTCM jo
S_ i ______ I
VEL0CITY CM/SEC
ACCELERATION CM/SEC/SEC -
m OISZ Ocog_§_
o_
oeo__
o_
IO
>J
m
n co
o
m o
>m;o
(Ob
en
otoTJp-i
JOb to
00|\joob0CO
CO
n
NJo.
CO
RR
EC
TED
AC
CE
LER
ATI
ON
. V
ELO
CIT
Y,
AND
DIS
PLA
CE
ME
NT
20
0.0
0 S
PS
C
EN
TRA
L C
HIL
E E
D..
3/3
/85
, 2
2:4
7:0
7 U
TC.
MS
-7.8
SA
N F
ER
NA
ND
0. d
HIL
E.
EA
ST-
WE
ST
PE
AK
VA
LUE
S:
AC
CE
L-3
32
.76
CM
/SE
C/S
EC
. V
EL
0C
ITY
-23
.90
CM
/SE
C,
DIS
PL
-5.5
1 C
M
340. n
-340. J
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I 2
4 0
8 10
12
14
10
18
20
22
24
26
28
30
32
34
36
38
40
to J-» ^
24.0
-i
-24.
0 J
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
1 I
I I
I I
I I
I I
I I
I I
I I
I I
2 4
6 8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
5.60
n
-5.6
0 J
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
It
I I
I I
I I
I I
I I
I I
I I
I I
I I
24
6
8 10
12
14
16
18
20
22
24
23
28
30
32
34
36
38
40
SE
CO
ND
S
eiz-v
pibol
DISPLACEMENT CM
VEL0CITY CM/SECCJ
o
ACCELERATION CM/SEC/SEC
O 19
a_
p I
m to
> n
o cs
m o
o
01
Ol
CO wm CD_os2 o> D O.to
a 10.
O)
aCD_
o_
W_
>J
CO
0110.
oCD_
o_
a o_
o 10_
O)a_
aCD
0_
tojo >n
o!
lOCOvjCO "
5 toll! 10m Ps 8 to o
tnM-»o
tos
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q.,
3/3
/85.
22:4
7:0
7 U
TC,
MS
-7.8
SA
N F
ER
NA
ND
0, C
rflL
E.
N0R
TH
-S0U
TH
C
0MP
UTI
NG
0P
T10
NS
- 2C
R0s
£.S
M00
TH
(10)
.N0N
0IS
E
-* ^ S
/
to M
0>
O HI
O *UJ Q. r (X. ui U.
U.
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85.
22:4
7:0
7 U
TC.
MS
-7.8
SA
N F
ER
KIA
ND
0, 6
lItE
. E
AS
T-W
ES
T C
0MP
UTI
NG
0P
T10
NS
- Z
CR
0SS
.SM
00T
H(1
0).N
0N0I
SE
Fc
CO
T 10 M
00
o UJ (/> -
CM
O UJ
Q 0. r
ce UJ ca u.
- u.
is o
10
FRE
QU
EN
CY
. H
Z
152
0
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
ATJ
0N
CE
NTR
AL
CH
ILE
EQ
., 3/3
/85.
22
:47
:07
UTC
, M
S-7
.8SA
N F
ER
NA
ND
0, C
lflLE
, N
0RTH
-S0U
TH
C0M
PU
TIN
G 0
PT
I0N
S-
ZCR
0SS
.SM
00TH
110I
.N0N
0IS
E
CO:t H
'
CO
O
UJ
O u
a a. r on UJ
I I tit Q
U.
U.
(9
CM
10
FRE
QU
EN
CY
. HZ
1520
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3
/3/8
5,
22:4
7:0
7 U
TC.
MS
-7.8
SAN
FE
RN
AN
D0,
dhl
LE.
EA
ST-
WE
ST
C0M
PU
TIN
G 0
PT
J0N
S-
ZCR
0SS
.SM
00TH
UO
J.N
0N0I
SE
CO:«
V
to
to
o LU
O)
O bl
O Q. r < a:
LU i i
QL (SI a. o (SI
CVJ
L0G
0F
FRE
QU
EN
CY
. HZ
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
SAN FERNAN00, CHILE. N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
CJ Ul CO
CJI
UJ CO
Q_enUJo:
CJ<s I LU>
CD
0.04
X X \XX/ X X,\XXA X
0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERIOD-SECONDS
A-222
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
SAN FERNAND0, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
CJ LU CO
CJiLUco
0. CO LU
CJ Q_i LU>
CD
0.04 0.1 0.2 ,0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-223
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
SAN FERNAND0, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
a LUCO
cj LU CO 2(3Q_ CO UJ
CJ
I LU>
CD
0.04 0.1 0.2 0.4 124 10
UNDAMPED .NATURAL PERI0D-SEC0NDS
A-224
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
SAN FERNAND0, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
300
0.5 1.0 - 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-225
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/95, 22:47:07 UTC, Ms-7.8
SAN FERNAN00, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
140
120
100oUJ CO
ltcnea o. cnUJon
o
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-226
200
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
SAN FERNAND0, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
0.5 1.0 4.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-227
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake of 3/3/85 22:47:07 UTC, M--7.8
3
San Isidro (San Pedro), Chile
DESCRIPTION COMPONENT
Longitudinal Vertical Transverse
Instrument Characteristics;
Frequency (Hz)
Damping (% Critical)
Filter Parameters:
Highcut (Hz)
Lowcut (Hz)
Peak Parameters;
Peak Acceleration, Unc. (cm/s/s)
Peak Acceleration, A (cm/s/s)
Peak Velocity, V (cm/s)
Peak Displacement, D (cm)
Paramet er Rat i os:
|V/A| (sec)
|AD/V2 |
25.0
0.200
0.061
2.6
25.0
0.380
0.050
1.7
25.0
0.180
-711.6
-706.8
43.2
6.91
-416.1
-393.3
19.8
1.69
686.3
696.0
-43.4
5.54
0.062
2.0
A-228
-V
SCALED INSTRUMENTRESPONSECM/SEC/SEC o
op
SCALED INSTRUMENTRESPONSE
1 CM/SEC/SEC ^ ro ru p pI_______I_______1
SCALED INSTRUMENTRESPONSE
^ CM/SEC/SEC v, ro ro o o
-0 men
o>
-^^HOm So'
COm
00_
oss-v
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC o
OIa_
OI
O)rj
O)co_
>g CO 0__m __S M
o ^,
SCALED INSTRUMENT RESP0NSE
CM/SEC/SEC ^ ro
SCALED INSTRUMENTRESP0NSE
<j CM/SEC/SEC xi iu to
a.
n>
O)
CDro.
Si
s.o"CO.
0110
OI m
OI 00_
men
..* iom
CD fO.
COm
iss-v
DISPLACEMENT CM
vELBcmrCM/SEC
ACCELERATION <, CM/SEC/SEC ^ o ot)
m
m if)
o
m o
(D>00r m
m
i O)(O
n
COfUo ob oC/3 ~D C/3
zsz-v
DISPLACEMENT CM
o
VEL0CITY CM/SEC
ACCELERATION CM/SEC/SEC >j
co m
o>
o_
o ^,
CD 00_
CD 10
8_<o"~CD
ta oi z ro
CD-
CD K).
o ta
(OCD__
O O_
DISPLACEMENT CM
o I
VELBCITYCM/SEC
ACCELERATI0N CM/SEC/SEC j,
§
m o IS
01ro
CTO
O) O
to ov~~
S
o __
O ^,
(O
OO
OlCB_
8lao
O IO_
Xa
>4oo_
00o
00 I0_
09 OD_
O 0_
O IO_
JL.
o0_
o
Oi*_
OlG9_
CT 00 _
oo _
oro _
o
a>~~O
o00
-^~~
0
^J
N->J~~*.__
>j"~ o >j"~ oo
CDo _CD""w _oo"~j».__
§100~~
OD_
Oo _
ar ^. ^^i1=3
i!'
J^
d
:
t«
^«l
*
!
^
-
;
^ ^
E.».=_r
Ff \m*irc k_
»"V
'
.
'
. e
kv
.
R *g ^2^05 c s»rfi rr\ ?og to jo
m> on ^JS og m mO7 ^> »o to P3n(0 >m CO r"r-jo ng
jij^n^fZ-i -r^m* ^2^sw^R?RH^<B8^mseos
<sS3 mpf .
j?^ Li<j».o-»mNif2"62 JL-«vjcoPOc?
ra^onn * m ~y~y5 comCO ' 2.m NI-In ooro
o2 oco bT3 O
7 COr* "o a> to(O
n2
O CD
DISPLACEMENT CM
VELBCITY CM/SEC
ACCELERATION <a CM/SEC/SEC x, o o p o
o B in 2
COm n
O!ea
rno_
o o
oN)_
o
8_
o ^,
NJ cn_
>aCD_
00o_
CD ^i
N)_
>j"
8_
O
00CD
00_
00o_
si00 00_
m
71
f c m
en =jng ?R
2 03
O
m o
n*
oooinorn* m n
n o1 4
(/)
T3 r f
(J\bi 4*.
n
o ob oU) o en
S_
Sio o_
o00_
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85
, 22:4
7:0
7 U
TCr
MS
-7.8
SA
N I
SIQ
R0,
CH
ILE
, V
ER
TIC
AL
C0M
PU
TIN
G 0
PT
I0N
S-
ZC
R0S
S,S
M00
TH
(5),
N0N
01S
E
4
to CO oo
o UJ o UJ Q a o: UJ t-»
on a
u. u.
s CD
(M
0 1
L0G
0F
FR
EQ
UE
NC
Y,
HZ
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EG)
., 3/3
/85,
22:4
7:0
7 U
TC.
MS
-7.8
SAN
IS
lbR
0. C
HIL
E,
TRA
NS
VE
RS
E
C0M
PUT1
NG
0P
TI0
NS
- ZC
R0S
S,S
M00
TH(5
),N0N
0IS
E
Fc
IN)
W
CO
O UJ
U)
U
Q »-i
Q.
(M
o: UJ >-t
or Q
u. u.
L0G
0F
FRE
QU
EN
CY
, HZ
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
ATI
0N
CE
NTR
AL
CH
ILE
EQ..
3/3
/85,
22
:47
:07
UTC
. M
S-7
.8SA
N I
SID
R0,
CH
ILE
, L0
NG
ITU
D1N
AI
C0M
PU
TIN
G 0
PT1
0NS
- ZC
R0S
S.S
M00
TH(2
0).N
0N01
SE
to 4x
O
o UJ (/) v. r o UJ
Q »-
Q? r < a: UJ t-4 o: s
u. u.
25
FRE
QU
EN
CY
. H
Z
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
ATI
0N
CE
NTR
AL
CH
ILE
EQ
., 3/3
/85.
22:4
7:0
7 U
TC.
MS
-7.8
SAN
IS
IDR
0, C
HIL
E,
VE
RTI
CA
L C
0MP
UTI
NG
0P
T10
NS
- ZC
R0S
S\S
M00
TH(2
0),N
0N01
SE
FRE
QU
EN
CY
. HZ
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3/3
/85.
22:4
7:0
7 U
TC.
MS
-7.8
SAN
IS
IUR
0, C
HlfE
, TR
AN
SV
ER
SE
,
, C
0MP
UTI
NG
0P
T10
NS
- ZC
R0S
S.S
M00
TH12
0J.N
0N01
SE
to ^
to
o UJ
U) u H-
O.
Z or tu
* i
or ca
u, u.
GJ o
ca
10
15
FRE
QU
EN
CY
. HZ
20
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
SAN ISIDR0, CHILE, L0NGITUDINAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
uUJ CO
CJI
UJ COzIS Q_ CO LJ
CJis I UJ
CD IS
\/x><\/ \
0.1 0.2 0.4 124 UNDAMPED NATURAL PERI0D-SEC0NDS
A-243
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
SAN ISIDR0, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
oUJ O)
uI
UJ O)
CL O) UJ
>- I 1 4
O
I UJ
CD
0.04
\/yy\/ \
0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-244
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
SAN ISIDR0, CHILE, TRANSVERSE 0,2,5,10,20 PERCENT CRITICAL DAMPING
uUJen
CJI
LU CO
Q. cnUJ
>- i
o I LU
CD
0.04 0.1 0.2. 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-245
1000
800 -
uLU CO
u 600 -UJtozSJ 0.toUJcc
u400 -
200 -
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
SAN ISIDR0, CHILE, L0NGITUDINAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
CM
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-246
250
200
uU-len
UJen
a. enUJoc.
o
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
SAN ISIDR0, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
150 -
100 -
0.5 1.0 '1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-247
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC. Ms-7.8
SAN ISIDR0, CHILE, TRANSVERSE 0,2,5,10,20 PERCENT CRITICAL DAMPING
1200
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-248
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake of 3/3/85 22:47:07 UTC,' Mg-7.8
ENDESA Building (Basement), Santiago, Chile
DESCRIPTION COMPONENT
Longitudinal Vertical Transverse
Instrument Characteristics;
Frequency (Hz)
Damping (% Critical)
Filter Parameters:
Highcut (Hz)
Lcwcut (Hz)
Peak Parameters;
Peak Acceleration, Unc. (cm/s/s)
Peak Acceleration, A (cm/s/s)
Peak Velocity, V (cm/s)
Peak Displacement, D (cm)
Parameter Ratios:
|V/A| (sec)
|AD/V2 I
30.0
0.330
121.6
124.0
11.7
1 .21
0.094
1 .1
30.0
0.310
96.3
94.6
4.77
0.914
0.050
3.8
30.0
0.220
118.9
119.6
14.1
-3.40
0.12
2.0
A-249
oss-v
SCALED INSTRUMENTRESPONSE
J. CM/SEC/SEC - 10 w o P
SCALED INSTRUMENTRESPONSE
CM/SEC/SEC
SCALED INSTRUMENT RESP0NSE
i CM/SEC/SEC - u < >o P
m > co 20< < >
scom msoo
IV)CD
P
8COm
TSZ-V
SCALED INSTRUMENTRESPONSE
J- CM/SEC/SEC -
SCALED INSTRUMENTRESP0NSE
,0 CM/SEC/SEC oVI VIo b I______j______I
SCALED INSTRUMENT RESPONSE
J. CM/SEC/SEC -to cj o o
Ol 10
CJ1Ol_
01 00 _
Ol O
COm o
o_O
VIru
O ^.
CD O.
09 IU.
<Dro.
o_
CD CD
S.
§:
t) m
>z im
S SoS
i' i ?=> «;O £, JQ i? ~^33
00
CD O)foCD
CZf5mo^q
oo coJ, g moo
COm
on
oO
C0R
RE
CTE
D A
CC
ELE
RA
TIO
N.
VE
LOC
ITY
, AN
D D
ISP
LAC
EM
EN
T 200.0
0 S
PS
CE
NTR
AL
CH
ILE
E
&.,
3/3
/85.
22
:47
:07
UTC
. M
S-7
.8
EN
DE
SA
BU
ILD
ING
(B
SM
U S
AN
TJA
G0.
CH
ILE
, LO
NG
ITU
DIN
AL
PE
AK
VA
LUE
S:
AC
CE
L-12
3.96
CM
/SE
C/S
EC
. V
EL0
CiT
Y-1
1.70
CM
/SE
C.
DIS
PL-
1.21
CM
130.
-i
-130
. J
1 I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
2 4
6 8
10
12
14
16
18
20
22
24
20
28
3
0
32
34
33
38
40
42
44
40
48
50
12.0
-i
to
en to
2 4
6 8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
1.3
0 J
1 I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
2 4
Q 8
10
12
14
16
18
20
22
24
26
28
3
0
32
34
3
6
38
4
0
42
44
46
48
5
0
SE
C0N
DS
DISPLACEMENT CM
8
VEL0CITY CM/SEC
ACCELERATION CM/SEC/SEC -
COo
o _B CJIZ fO
c »ft *-D
CJI CO_
CJICD_
Olo_
O)to_
o to
CDru_
O) cn_
CDCD
CDCD_
O) CD
o>onO C0_
10m n
O
VINJro
NJ O__
NJ N)
o in
NJ O
NJa
vjP)
NJCO_
CDo_
COo_
00a
CD CO_
CD N)_
ID CO_
-V
DISPLACEMENT VELOCITY ACCELERATI0N 6 CM o i CM/SEC ^ £ CM/SEC/SEC oCO CD CO CD <* °" fO KJ O O O
1 ] 11 1 ' ' Jo -xj
i m
00
m
CO
ssz-v
DISPLACEMENT
Jo
VELBCITY CM/SEC
ACCELERATJ0N CM/SEC/SEC
8 en z 10
CJlCD.
m o
O
o>o
CD CD_
O CD _
cnm o is
o_o_NJ~~
8 x
00
§1
(O
n
(OC3_
CO
RR
EC
TE
D A
CC
ELE
RA
TIO
N.
VE
LOC
ITY
, A
ND
DIS
PLA
CE
ME
NT
200.0
0 S
PS
CE
NT
RA
L C
HIL
E
EQ
.. 3
/3/8
5,
22:4
7:0
7 U
TC
, M
S-7
.8
EN
DE
SA
BU
ILD
ING
(B
Sh
T),
SA
NtlA
G0
. C
HIL
E,
TR
AN
SV
ER
SE
P
EA
K V
ALU
ES
: A
CC
EL
--1
19
.57
C
M/S
EC
/SE
C,
VE
L0C
ITY
-l4.0
d C
M/S
EC
, D
ISP
L-3
.40 C
M
120.
-i
-120
. -J
1 I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
M
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
2 4
0 8
10
12
H
16
18
20
22
24
23
28
30
32
34
38
38
40
42
44
48
48
50
Is)
Cn
15.0
-i
-15.
0 -J
1 I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I II
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
2 4
6 8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
48
48
50
3.40
-i
-3.4
0 -
J'a1
w w
20
22
24
SE
C0
ND
S
y u
y
DISPLACEMENT CM
VELBCITY CM/SEC
ACCELERATION CM/SEC/SEC -
S Ul Z fO_
Sa
01Ol
e w m * Ro
CJ1 CO
a o
o> to
CO O.mo xftS ro.ZO N|-w i:.
COCO_
COo_
CO M
CO CO
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3/3
/85.
22:4
7:0
7 U
TC,
MS
-7.8
E
ND
ES
A B
UIL
DIN
G (
BS
MT)
, S
AN
TfA
G0,
CH
ILE
. L0
NG
ITU
D1N
AL
C0M
PU
TIN
G 0
PT
10N
S-
2CR
0SS
,SM
00T
H(1
0).N
0N0I
SE
CM
Cn
00
O LU O
U § Q.
-.r a:
in 1
-4 or ea
u.
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3
/3/8
5,
22:4
7:0
7 U
TC,
MS
-7.8
E
ND
ES
A B
UIL
DIN
G (
BS
MT)
, S
AN
TIA
G0.
C
HIL
E.
VE
RT
ICA
L C
0MP
UT
ING
0P
TJ0
NS
- Z
CR
0SS
,SM
00T
HllO
).N
0N0I
SE
CMu
to Cn
(O
0 1
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3/3
/85,
22:4
7:0
7 U
TC.
MS
-7.8
^
EN
DE
SA
BU
ILD
ING
(B
SM
T),
SA
NtlA
G0
. C
HIL
E.
fRA
NS
VE
RS
E
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
S,S
M00
TH
UO
).N
0N01
SE
CO
o UJ O UJ
to
en
oS?
^
(XL
111
1-4 (£.
(9
U.
U.
(9
L0G
0F
FR
EQ
UE
NC
Y.
HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3/3
/85.
22:4
7:0
7 U
TC,
MS
-7.8
E
ND
ES
A B
UIL
DIN
G (
BS
MT)
, S
AN
TfA
G0,
CH
ILE
, L0
NG
ITU
D1N
AL
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
S,S
M00
rH(2
0),N
0N01
SE
o>
u UJ (/) u ul
o 0. r < o: UJ » i
or (S
I u. (O
20
25
30
FRE
QU
EN
CY
. H
Z
F0U
RIE
R A
MP
LITU
DE
S
PE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3/3
/85.
22
:47
:07
UTC
, M
S-7
.8
EN
DE
SA
BU
ILD
ING
(B
SM
T).
SA
NT
IAG
0. C
HIL
E,
VE
RT
ICA
L C
0MP
UTI
NG
0P
TI0
NS
- Z
CR
0SS
.SM
00T
H(2
D),
N0N
01S
E
to Oi
to
Fcl
CM n
4,
o UJ (/> ^x o u Q 0. 2:
< on UJ t 4 cc (SI
IS
10
15
FRE
QU
EN
CY
, H
Z
20
25
30
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CEN
TRAL
CH
ILE
EQ
.. 3/3
/85,
22:4
7:0
7 U
TC.
MS
-7.8
EN
DES
A B
UIL
DIN
G (
BS
flU S
AN
tlAG
0, C
HIL
E,
fRA
NS
VE
RS
E
C0M
PU
TIN
G 0
PT
10N
S-
ZC
R0S
S.S
M00
TH
(20)
,N0N
0IS
E
T to Oi
CO
o UJ (I) V. r
U UJ
Q D OL r o:
tu
> t at BJ
LL u. BJ
(O
10
15
FRE
QU
EN
CY
, HZ
2025
30
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE ECU 3/3/85, 22:47:07 UTC, Ms-7.8
ENDESA BUILDING (BSMT), SANTIAG0, CHILE, L0NGITUDINAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
a LUCO
o iLJ CO
CL CO LU
CJs I UJ>CD
0.04 0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI0D-SEC0NDS
A-264
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
ENDESA BUILDING (BSMT), SANTIAG0, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
uLU CO>x.
z:o UJ C/)
Q_ CO UJo:
o s __«LU>
CD
0.04 0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-265
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85. 22:47:07 UTC, Ms-7.8
ENDESA BUILDING (BSMT), SANTIAG0. CHILE, TRANSVERSE 0,2,5,10,20 PERCENT CRITICAL DAMPING
uUJen
CJI
UJenzSI <1_en LUen
uSI I LU
CD (SI
y^
^>x
J<\/\/\/y\ \/W>
)4\/ \/ \/><
X
\ ^5<NX
\*y\x
^_[><N/ \
\
0.04 0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI00-SEC0NDS20
A-266
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC. Ms-7.8
ENDESA BUILDING (BSMT), SANTIAG0, CHILE, L0NGITUDINAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
140
120 :
100 :
CO
LJ CO
(SI Q_ CO LU
U
LJ>
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-267
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
ENDESA BUILDING (BSMT), SANTIAG0, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
100
oUl CO
O
UJtoSI Q. toUJCC
U(S
UJ>
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
7 11 15
A-268
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
ENDESA BUILDING (BSMT), SANTIAGO, CHILE, TRANSVERSE 0,2,5,10,20 PERCENT CRITICAL DAMPING
140 r
120. :
100 :oLL) CO
CJ
LU CO
Q. CO LL) (X
CJ Si
0.5 1.0 1.5 2.0 2.5 3.0 3UNDAMPED'NATURAL PERI0D-SEC0NDS
11 15
A-269
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake, 3/3/85 22:47:07 UTC, Ms-7.8
Ventanas, Chile
DESCRIPTION
Instrument Characteristics:
Frequency (Hz)
Damping (% Critical)
Filter Parameters:
Highcut (Hz)
Lowcut (Hz)
Peak Parameters:
Peak Acceleration, Unc. (cm/s/s)
Peak Acceleration, A (cm/s/s)
Peak Velocity, V (cm/s)
Peak Displacement, D (cm)
Parameter Ratios:
|V/A (sec)
|AD/V2 |
COMPONENT
Longitudinal Vertical
-
25.0* 25.0*
62.6 60.4
18.0 30.0
0.200 0.303
-206.5 -176.0
-208.9 173.4
-23.3 -7.10
-3.88 -1.20
0.11 0.041
1.5 4.1
Transverse
25.0*
59.3
19.0
0.222
228.0
223.0
-24.6
-4.60
0.11
1.7
Nominal Value
A-270
m-v
SCALED INSTRUMENT RESPONSE
CH/SEC/SEC
SCALED INSTRUMENTRESPONSE
CM/SEC/SEC
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC ,0 o
enm n QoCO
m7cm ..zn < 4m
QQo
,1 «om
m% m
ZLZ-V
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC w
SCALED INSTRUMENTRESPONSE
i CM/SEC/SEC - CD 00 O P
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC o
s 2: s:
o_ >J 10
OD_
00if) * m o «'
O CO
CD_
s: §: o-10.5'j».O"
CD_CD O CD N)
§1oo co_
§1
21
s:
°_ 5~
m
3Qo w!
cnson
ZLZ -V
DISPLACEMENT CM
COo
VEL0CITY CM/SEC
ACCELERATI0N CM/SEC/SEC ,0
o
COm n
oCO
O
SI
-o m
m tn
n n
o
m n
n
P>m
CJ1>00 r m
en m
CO13
COCO 00n
o o o oen en
wz-v
DISPLACEMENTCM w
VELBCITY CM/SEC
CD O
ACCELERATI0N CM/SEC/SEC M
P
ro_
5 SZOl
CD__
HJ
>j
CD(/> *-mo CD" g o.
0 C/)
vj a>
CO.
eo NJ
00 __
81o
o
T3m
mCO* *
s 1 O ;P ° T m1
n
rooo >m
S3
nz?
n>
ui>oor-,r m
COm
3 °CO O
-«
§1CO COn
°_
CD_
O_
DISPLACEMENT CM
VELOCITY CM/SEC
ACCELERATI0N i CM/SEC/SEC -° °
>m
COm n
oID
to O ro 10_ro~.u_
»o~~0_»o~~en
U)~~
O_
o_Jfc.1^ ro_jk1^ j>.^jk^ o_^~~CD
SIen ro_en
SISISI
9LZ -V
DISPLACEMENT CM
VEL0CITY CM/SECVI
Joo
oo o
ACCELERATION CM/SEC/SEC -
CD O
CB O_O)
00_
mKS?
CO_
»0
O
CO
RR
EC
TED
AC
CE
LER
AT
I0N
. V
EL0
C1T
Y,
AND
DIS
PLA
CE
ME
NT
20
0.0
0 S
PS
C
EN
TRA
L C
HIL
E E
Q.f
3/3
/85
, 22:4
7:0
7 U
TC.
MS
-7.8
VE
NTA
klA
S,
CH
ILE
, TR
AN
SV
ER
Sfe
P
EA
K V
ALU
ES
: A
CC
EL
-22
3.0
4
CM
/SE
C/S
EC
, V
EL0C
ITY
-24.5
5 C
M/S
EC
, D
ISP
L-4
.60 C
M
230.
-
oo
UjU
JcJ
2o
f
ou -2
30
. J
2 A
0 8
10
12
H
10
18
20
22
2*
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54I I
I I I
I50
58
60
*T to
25.0
-
go
-UJ -2
5.0
J
6 8
10I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
It|
I |
I I
| I
| I
I |
I I
I |
I I
| I
| I
I I
I |
| I
I 12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
4.70
n
-4.7
0 -
JI
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
|t|
| I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
| |
| I
! 4
6
8 10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
58
58
60
SE
C0N
DS
-V
DISPLACEMENT CM
VEL0CITY CM/SEC
o> fj
01 rt
I s:m _. g §_
o_Jn
ro o pI
ACCELERATIONCM/SEC/SEC ,0
u> p
___I_______I
o> CD_
m >TV
C m en
n
os> ;o ;o m o
COm n iso to
< i
ro_
CD__
815 M O~
§1
CO
5R
§: £
2n
! z'62 ro co vi co
m
810"ro.
81
mP ro
2 § CO O
O)o
CO
S
F0U
R1E
R A
MP
LITU
DE
SP
EC
TRU
M 0
F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3/3
/85,
22:4
7:0
7 U
TC.
MS
-7.8
VE
NT
AN
AS
, C
HIL
E,
L0N
G1T
UD
1NA
L C
0MP
UTI
NG
0P
T10
N2-
ZC
Rds
S.S
M00
TH
l20)
,N0N
01S
E
to 00 to
u Ul u a. r (XL
111
t t
{£.
(9
U.
U.
CD
Fci
CO:n
4'
CM
8
10
FRE
QU
EN
CY
, H
Z
1214
1618
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3/3
/85,
22:4
7:0
7 U
TC,
MS
-7.8
VE
NT
AN
AS
, C
HIL
E,
VE
RTI
CA
L C
0MP
UTI
NG
0P
T10N
S-
ZCR
0SS
,SM
00TH
(20)
,N0N
01S
E
10 00
CO
<J LU
U)
v,.
E-
<J LJ
Q Q. r a:
ui t 4 OH Q
U.
U.
Q Q
1015
2025
30
FREQ
UENC
Y, HZ
F0U
RIE
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q..
3/3
/85,
22
:47
:07
UTC
. M
S-7
.8V
EN
TAN
AS
, C
HIL
E,
TRA
NS
VE
RS
E
, C
0MP
UTI
NG
0P
T10
NS
- Z
CR
03s.
SM
00T
Hl2
0).N
0N01
SE
to 00
o UJ to V o*
u
o Q. r
< cc. UJ
1 4 a Q
u. u. 61 o
01
10
FRE
QU
EN
CY
. H
Z
1520
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
VENTANAS, CHILE, L0NGITUOINAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
cjLU CO
CJ
UJ CO
CL CO UJ
CJ (S
UJ
CD SI
0.04
\/x><\/ \/
0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI00-SEC0NDS
A-285
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
VENTANAS, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
oLU CO
CJ1
LU C/)2 (Si CL CO LUo:
os iLU>CD
0.04
X X OX/ X
\/x>\/ \
0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-286
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
VENTANAS,CHILE, TRANSVERSE 0,2,5,10,20 PER£ENT CRITICAL DAMPING
CJ UJ CO
CJ
UJ CO
Q_ CO Ul
>- I
CJ
I UJ>
CD
0.04 0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI0D-SEC0NDS
A-287
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
VENT ANAS, CHILE, L0NGITUDINAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
500
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-288
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
VENTANAS, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
160
140
120 :
uLU CO
100 E0
LUco
0. CO LUcr
o
0.5 1.0 ;i.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-289
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ.. 3/3/85, 22:47:07 UTC, Ms-7.8
VENTANAS, CHILE, TRANSVERSE 0,2,5,10.20 PERCENT CRITICAL DAMPING
1200
0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-290
SUMMARY OF STRONG-MOTION RECORD PROCESSING
Central Chile earthquake, 3/3/85 22:47:07 UTC, M^-7.8o
Zapallar, Chile
DESCRIPTION
Instrument Characteristics:
Frequency (Hz)
Damping (% Critical)
Filter Parameters:
Highcut (Hz)
Lowcut (Hz)
Peak Parameters:
Peak Acceleration, Unc. (cm/s/s).
Peak Acceleration, A (cm/s/s)
Peak Velocity, V (cm/s)
Peak Displacement, D (cm)
Parameter Ratios:
V/A| (sec)
AD/V2 |
COMPONENT
North-South Vertical East-West
25.2 25.8 26.9
60.3 64.0 ' 58.5 '
20.0 20.0 20.0
0.556 0.667 0.417
-285.3 210.1 296.6
-265.1 191.0 298.5
-11.2 5.20 13.5
1.14 -0.479 -1.69
0.042 0.027 0.045.
2.4 3.4 2.8
A-291
Z6Z -V
SCALED INSTRUMENTRESPONSE
A CM/SEC/SEC o o oo p
SCALED INSTRUMENT RESP0NSE
CM/SEC/SEC w
SCALED INSTRUMENTRESPONSE
^ CM/SEC/SEC ,0O CD O O
m
O_
SCALED INSTRUMENT RESPONSE
CM/SEC/SEC u
P
SCALED INSTRUMENT RESP0NSE
CM/SEC/SEC w
tnm n
o in
SCALED INSTRUMENTRESP0NSE
£ CM/SEC/SEC w
o o
oO
o>CO_
VI o_
VJ O
VJ cc_
COO
IB K)
Oo_
VJo_
VJM_
VJ rn
VJ 00
COo_
CO K)_
.
4 :
'. ,
j
C0R
RE
CTE
D A
CC
ELE
RA
T10N
. V
ELO
CIT
Y,
AND
DIS
PLA
CE
ME
NT
20
0.0
0 S
PS
C
EN
TRA
L C
HIL
E E
Q.,
3/3
/85
, 22:4
7:0
7 U
TC.
MS
-7.8
ZA
PA
LLA
R,
CH
ILE
, N
0RT
H-S
0UT
ri P
EA
K V
ALU
ES
: A
CC
EL-2
65.1
1 C
M/S
EC
/SE
C,
VE
L0C
ITY
-11.2
2 C
M/S
EC
, D
ISP
L-1.
14 C
M
270.
-
SO
UJU
J -270
. J
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I It
I I
I I
I I
I I
I I
I I
I I
I I
I I
2 A
0 8
10
12
14
10
18
20
22
24
20
28
30
32
34
30
38
40
42
44
40
48
T to <o
12.0 t
E" »-« ii«
Ojj
>
.-I
JCl*J
O
- . _
-12.
0 J
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I IT
I I
I I
I I
I I
I I
I I
I I
I I
I I
2 48
8 10
12
14
10
18
20
22
24
20
28
30
32
34
30
38
40
42
44
40
48
1.20
-i
(A H4 Q
-1.20 J
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
I I
2 A
6 8
10
12
14
10
18
20
22
24
26
28
30
32
34
30
38
40
42
44
46
48
SE
C0N
DS
-V
DISPLACEMENT CM
VEL0CITY CM/SECro
b
n _1 S_
tn ro
ACCELERATI0N CM/SEC/SEC
01 o_
01 ro_
Nl o
m>7s< >
°ca
m o
ui r«
CJI OD__
§181
01
to _ n cso en
oo_
CO_
CD
§.§"
o"§. o"
toO
r rn-
m no«-4CO
o pb oenT) CO
-V
DISPLACEMENT CM
VELOCITY CM/SEC
ACCELERATI0N CM/SEC/SEC
CJo
COm oG>2 Oto
a o_
exKJ_
O)
o
atO.
UI KJ.Io
si §1
O>
o00.
o_
ro
NJ
oo.
§1
roo_"2 o>c:.r
§_8_oN).
§_
862-V
DISPLACEMENT CM
VEL0CITY CM/SEC
ACCELERATION CM/SEC/SEC
p I
uCD
0_
Jk"~
OD__
T)m
Ic mU)
> <">
10g
n
m o
to
ton*a*- 1 to
. CO
b w(On
662-V
DISPLACEMENT CM
VELOCITY CM/SEC
ACCELERATI0N- cli CM/SEC/SEC 0
op p
0_
o _ Q 01 = o_
j
OlIU
C Wm NJ_
s_
O)
COm n
oC/5
0_
10
>4~~
03
CD O
C0_
CO
03 KJ
03 O)_
s_
i=U)
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3
/3/8
5.
22:4
7:0
7 U
TC,
MS
-7.8
ZAP
ALL
AR
, C
HIL
E.
N0R
TH-S
0UTH
C
0MP
UTI
NG
0P
TJ0
NS
- ZC
R0S
S.S
M00
THU
O).N
0N0I
SE
CO o
o
o UJ
(/> r
w
o u 'B UJ or U.
-
u. (O a
I I
I I
I
0 1
L0G
0F
FRE
QU
EN
CY
. HZ
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
., 3/3
/85.
22
:47
:07
UTC
, M
S-7
.8ZA
PA
LLA
R,
CH
ILE
, E
AS
T-W
ES
T C
0MP
UTI
NG
0P
T10
NS
- ZC
R0S
S,S
M00
TH(1
0),N
0N0I
SE
u
o
to
o LU U LU
Q OL 2E or
LU 4 or u.
-
u. Gt
L0G
0F
FR
EQ
UE
NC
Y,
HZ
F0U
RIE
R A
MP
LITU
DE
SPE
CTR
UM
0F
AC
CE
LER
AT1
0N
CE
NTR
AL
CH
ILE
EQ
.. 3/3
/85.
22
:47
:07
UTC
. M
S-7
.8Z
AP
AlL
AR
. C
HfL
E.
VE
RTI
CA
L C
0MP
UTI
NG
0P
T10
NS
- ZC
R0S
§.S
M00
THU
O).N
0N0I
SE
CM
O
Ul
(0 O UJ
Q Q. r < o: UJ »-«
tt ta
u. u.
<a to
I 10
FREQ
UEN
CY.
HZ
1520
F0U
R1E
R A
MP
LITU
DE
SP
EC
TRU
M 0
F A
CC
ELE
RA
T10N
C
EN
TRA
L C
HIL
E E
Q.,
3/3
/85
. 22:4
7:0
7 U
TC.
MS
-7.8
ZA
PA
LLA
R,
CH
ILE
, E
AS
T-W
ES
T C
0MP
UTI
NG
0P
T10
NS
- Z
CR
0SS
.SM
00T
HU
OJ.
N0N
0IS
E
" w
CO o
Cn
O HI in u
a a. r a: Q
U.
U.
(SI
ID
(SI
CM
10
FRE
QU
EN
CY
. H
Z
152
0
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
ZAPALLAR, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
UJ CO
UJ
CL
UJ
I > «CJ
I UJ
CD
0.04 0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERIOD-SECONDS
A-306
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
ZAPALLAR. CHILE. VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
oLJ 01
U i
LJ 01
Q- 01 LJ
Us I LLJ >
CD
0.04 0.1 0.2 0.4 124 10
UNDAMPED NATURAL PERI0D-SEC0NDS
A-307
PSEUD0 RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
ZAPALLAR, CHILE, EAST-WEST 0,2,5,10,20 PERCENT CRITICAL DAMPING
uLU CO
CJ
LJLJ CO z. isCL CO LU
CJIS I LlJ
OIS
0.04
\/X>\/ \
0.1 0.2 0.4 124 10 UNDAMPED NATURAL PERI00-SEC0NDS
A-308
200
150
uUJ O)*v.
2: oUJ O)z <s Q. toUJo:
u
UJ>
100
50
RELATIVE VEL0CITY RESP0NSE SPECTRACENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
ZAPALLAR, CHILE, N0RTH-S0UTH 0,2,5,10,20 PERCENT CRITICAL DAMPING
RV FAS
0.0 0.5 1.0 JL.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-309
80
70
60
oUJenv»2:O UJ
UJo:
50
40
530
20
10
RELATIVE VEL0CITY RESP0NSE SPECTRA CENTRAL CHILE EQ., 3/3/85, 22:47:07 UTC, Ms-7.8
ZAPALLAR, CHILE, VERTICAL 0,2,5,10,20 PERCENT CRITICAL DAMPING
RV FAS
0.0 . 0.5 1.0 1.5 2.0 2.5 3.0 3 UNDAMPED NATURAL PERI0D-SEC0NDS
11 15
A-310