geotechnical earthquake engineering · → combined pile-raft foundation (cprf) katzenbach et al....
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Geotechnical Earthquake
Engineering
by
Dr. Deepankar Choudhury Humboldt Fellow, JSPS Fellow, BOYSCAST Fellow
Professor
Department of Civil Engineering
IIT Bombay, Powai, Mumbai 400 076, India.
Email: [email protected]
URL: http://www.civil.iitb.ac.in/~dc/
Lecture – 43
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IIT Bombay, DC 2
Module – 9
Seismic Analysis and
Design of Various
Geotechnical Structures
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3
Latest News on Major
Earthquake in Iran A M7.8 earthquake occurred on the
afternoon of Tuesday, April 16, 2013
in southeastern Iran, near the Pakistan
border. Strong ground motions
extended more than 150 miles from
the epicenter, and the earthquake was
widely felt in the region. Preliminary
reports indicate dozens of fatalities
and more than 850 people injured,
with damage concentrated in the
immediate area of the earthquake. The
sparsely populated and remote region
of this earthquake has limited the
potential for broader effects from this
event
Event Time
1.2013-04-16 10:44:20 UTC
2.2013-04-16 15:14:20 UTC+04:30 at epicenter
3.2013-04-16 16:14:20 UTC+05:30 system time
Location
28.107 N 62.053 E depth=82.0km (51.0mi)
Nearby Cities
1.83km (52mi) E of Khash, Iran
2.168km (104mi) NE of Iranshahr, Iran
3.192km (119mi) SE of Zahedan, Iran
4.232km (144mi) SSW of Rudbar, Afghanistan
5.606km (377mi) NE of Muscat, Oman
Source: http://earthquake.usgs.gov
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Source: http://earthquake.usgs.gov 4
Tectonic Summary (as per USGS) of M7.8
Iran Earthquake The April 16, 2013 M 7.8 earthquake east of Khash, Iran, occurred as a result of normal
faulting at an intermediate depth in the Arabian plate lithosphere, approximately 80 km
beneath the Earth's surface.
Regional tectonics are dominated by the collisions of the Arabian and India plates with
Eurasia; at the longitude of this event, the Arabian plate is converging towards the
north-northeast at a rate of approximately 37 mm/yr with respect to the Eurasian
plate. Arabian plate lithosphere is subducted beneath the Eurasian plate at the Makran
coast of Pakistan and Iran, and becomes progressively deeper to the north.
The subducted Arabian plate is known to be seismically active to depths of about 160
km. The frequency of moderate and large earthquakes within the subducted Arabian
plate is not high compared with similar events in some other subducted plates
worldwide, but several earthquakes have occurred within this slab in the region of
today's event over the past 40 years, including a magnitude 6.7 shock 50 km to the south
in 1983. In January of 2011, a M 7.2 earthquake occurred approximately 200 km to the
east, in a similar tectonic environment to the April 16 earthquake.
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Source: US Geological Survey (USGS) website 5
USGS Shake Map at Iran-Pakistan
Boarder for 16.04.2013 M7.8 Earthquake
USGS Shake Map shows maximum
shaking intensity of VIII (Severe) on
the Modified Mercalli Intensity
(MMI) Scale, with potentially heavy
damage expected. USGS PAGER
estimates a population of about 2,000
were exposed to this severe (MMI
VIII) earthqauke and 377,000 to very
strong shaking (MMI VII) with
moderate to heavy damage potential.
Earthquake ruptures at depth (an
estimated 80 km) tend to present
lower ground motions in the epicentral
region than do shallower earthquakes.
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Combined Pile – Raft
Foundation (CPRF)
Under Earthquake Conditions
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→ Combined Pile-Raft Foundation (CPRF) Katzenbach et al. (2009)
Settlements calculated for a shallow foundation:
s > 40 cm
z = 0 - 20 m → 75 - 80 %
Messeturm · Frankfurt am Main,
Germany
Settlements:
Messeturm · Frankfurt am Main, Germany
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dydxy,x,s)s(R k,raft
m
1j
k,raftj,k,pilek,tot sRsRsR
sRsRsR j,k,sj,k,bj,k,pile
Total resistance of the CPRF:
Pile resistance:
Raft resistance:
Bearing concept of a
Combined Pile-Raft Foundation (CPRF)
Katzenbach et al. (2012)
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Analytical study:
9
Katzenbach et al. (1998) had suggested that designing Combined Pile-Raft
Foundations (CPRF) requires the qualified understanding of soil-structure
interaction.
Rtotal,k = ΣRpile,k, j + RRaft, k
Total resistance of the CPRF:
Pile resistance: sRsRsR jksjkbjkpile ,,,,,,
Raft resistance:
dydxyxssR kraft ,,)(,
αCPRF is set between 0.45-0.55
s =
(Katzenbach et al. 1998).
, ,
1
,
( )
( )
m
pile k j
j
CPRF
tot k
R s
R s
CPRF coefficient:
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Three dimensional view of pile group and pile-raft model in ABAQUS
(Eslami et al. 2011)
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Dynamic loading response:
11
Comparison of acceleration and bending moment response of under
sinusoidal accelerations
(Eslami et al. 2011)
Input acceleration – 1 m/sec2
Input frequency – 1 Hz
36% decrease in
piled raft model
54 %
decrease in
piled raft
model
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Seismic loading response:
• El- centro acceleration time history was chosen.
• Input acceleration and displacement- 4.21m/sec2 and 37.4 cm.
12
Acceleration response
34% reduction
(Eslami et al. 2011)
piled raft pile group
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9%
reduction
Horizontal displacement response under El- centro seismic
loading
Piled raft pile group
(Eslami et al. 2011) 13
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Case Study
Combined Pile – Raft
Foundation (CPRF)
under Earthquake
Conditions
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Case study of pile-raft foundation during 2011 Tohoku earthquake
Yamashita et al. (2011):
Building located at JAPAN PROTON ACCELERATOR RESEARCH COMPLEX (JPARC).
15
Pile raft foundation
371 PHC piles
Diameter – 0.6m to 0.8m
Earthquake occurred – 44
month after the end of
construction.
Epicenter -270 km from
the site
Ground acceleration –
3.24 m/s2 and 2.77 m/s2 for
the horizontal and vertical
directions .
Yamashita et al. (2011)
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Ratio of load carried by pile Pile P1 Pile P2
Decreased from 0.85
to 0.82 after the
earthquake
Decreased from 0.67
to 0.57 after the
earthquake
(Yamashita et al. 2012) 16
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IIT Bombay, DC 17
Seismic Design of
Ground Anchors
See, Rangari, S. M. (2013), PhD Thesis, IIT Bombay, Mumbai, India.
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• To mitigate the effect of earthquake Ground Anchors can be used for structures
subjected to uplift / pullout loads.
• Estimation of Uplift Capacity of Ground Anchor is an application of passive earth
pressure theory.
• Problem is more complex under seismic conditions.
INTRODUCTION
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The total reaction R1 and R3 on
the failure surfaces are computed
by integrating Kötter’s equation;
•W is the weight of failure
soil block,
• Pp d1 and Pp d3 are the
seismic passive
resistances,
• is soil friction angle,
• B is width and H is depth
of anchor
•Qh and Qv are total
seismic horizontal and
vertical inertial forces
respectively.
•Simple Planar failure surface. Hence the
Kötter’s (1903) equation reduces to,
sinp s
Horizontal Strip Shallow Anchor under Seismic Conditions
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Typical Design Charts (Results) for Seismic Uplift Capacity
Factor of Horizontal Shallow Anchors
a. Using Pseudo-Static approach b. Using Pseudo-Dynamic approach Rangari, S.M., Choudhury, D., Dewaikar, D.M. (2013) in Geotechnical and Geological
Engineering , Springer, Vol. 31(2), pp. 569-580.
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Comparison of ultimate seismic uplift capacity factor (F E = Pud/ B2) for various
values of kh and kv= 0.5 kh for = 30 , = 4 with H/ =0.3 and H/ =0.16.
kh Ghosh (2009)
Pseudo-
dynamic
Kumar
(2001)
Pseudo-
static
Choudhury and
Subba Rao
(2004)
Pseudo-static
Present study
Pseudo-
static
Pseudo-
dynamic
0.0
13.27
13.27
12.89
13.01
13.01
0.1
12.59
12.48
12.44
12.12
12.08
0.2
11.90
11.71
11.96
11.25
11.29
0.3
11.14
10.90
11.53
10.39
10.61
0.4
10.21
9.81
11.01
9.56
10.05
Comparison of Results
Rangari, S.M., Choudhury, D., Dewaikar, D.M. (2013) in Geotechnical and Geological
Engineering , Springer, Vol. 31(2), pp. 569-580.
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For a plane failure surface, Kötter’s equation (1903), takes the following form
where,
p = uniform pressure on failure
plane
= unit weight of soil
s = represents the distance of failure plane
as measured from ground surface
The total reaction R1 and R3 on the failure surfaces are computed by integrating
Kotter’s equation;
sinp s
Inclined Strip Shallow Anchor under Seismic Conditions
Rangari, S.M., Choudhury, D., Dewaikar, D.M. (2012) in Disaster Advances, Vol. 5(4), pp. 9-16.
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For Design, qudnet can is expressed as,
Net seismic uplift capacity factor ( F d) can be obtained as;
where, embedment ratio, and Kp d is net seismic passive earth pressure
coefficient.
Critical angle of failure planes:
The trial value of α1 and α3 are obtained such that the values of Ppγd1 and Ppγd3
should be same obtained from failure wedges CDF and ABE respectively.
B
H
udnet dq 0.5 BF
2 2 2
d P d
v h
F tan 0.25 tan K cos tan tan
2 1 k sin k cos
Inclined Strip Shallow Anchor under Seismic Conditions
Rangari, S.M., Choudhury, D., Dewaikar, D.M. (2012) in Disaster Advances, Vol. 5(4), pp. 9-16.
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Typical Design Charts (Results) for Seismic Uplift Capacity
Factor of Obliquely loaded Inclined Shallow Anchors
Rangari, S.M., Choudhury, D., Dewaikar, D.M. (2012) in Disaster Advances, Vol. 5(4), pp. 9-16.
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COMPARISION OF RESULTS
Comparison of net SEISMIC uplift capacity factor (F d) with results from
literature for =30 , with = 30 and ε =3.
kh Choudhury and Subba Rao
(2005)
Present study
kv=0.0kh kv=0.5kh kv=1.0kh kv=0.0kh kv=0.5kh kv=1.0kh
0.0 5.85 5.85 5.85 6.28 6.28 6.28
0.1 5.48 5.32 5.16 6.27 5.95 5.61
0.2 5.39 4.76 4.43 6.25 5.62 5.05
0.3 5.28 4.31 3.53 6.13 5.2 4.41
0.4 4.99 3.69 -- 5.94 4.73 --
Rangari, S.M., Choudhury, D., Dewaikar, D.M. (2012) in Disaster Advances, Vol. 5(4), pp. 9-16.
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Deepankar Choudhury, IIT Bombay, India
Seismic Behaviour of
Municipal Solid Waste
(MSW) Landfill
Savoikar, P (2009) , PhD Thesis, IIT Bombay, Mumbai, India.
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Deepankar Choudhury, IIT Bombay, India
Components of Municipal Solid Waste (MSW) Landfill
See Kavazanjian et al. (1998) in Proc. of US NCEE, Seattle.
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Dynamic Properties of Municipal Solid Waste Material
Choudhury, D. and Savoikar, P (2009) in Waste Management, Elsevier, Vol 29, pp. 924-933
Typical
variation of
unit weight of
municipal
solid waste
(MSW)
material used
in landfill with
depth
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Dynamic Properties of Municipal Solid Waste Material
Choudhury, D. and Savoikar, P (2009) in Waste Management, Elsevier, Vol 29, pp. 924-933
Typical
variation of
shear wave
velocity of
municipal
solid waste
(MSW)
landfill with
depth
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Dynamic Properties of Municipal Solid Waste Material
Choudhury, D. and Savoikar, P (2009) in Waste Management, Elsevier, Vol 29, pp. 924-933
Typical
variation of
damping ratio
of municipal
solid waste
(MSW)
landfill
material with
cyclic shear
strain
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Dynamic Properties of Municipal Solid Waste Material
Choudhury, D. and Savoikar, P (2009) in Waste Management, Elsevier, Vol 29, pp. 924-933
Typical
variation of
normalized
shear modulus
of municipal
solid waste
(MSW)
landfill
material with
cyclic shear
strain
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Seismic Ground Response Analysis of MSW Landfills
Equivalent-linear analysis of MSW landfill sections during earthquake motions
using DEEPSOIL
Choudhury, D. and Savoikar, P (2009) in Engineering Geology, Elsevier, Vol. 107, pp. 98-110.
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Typical Results by Choudhury and Savoikar (2009)
Variation of MHA with depth for 40m high
landfill on type (ii) foundation
Variation of spectral amplification with
frequency for 40m high landfill.
Choudhury, D. and Savoikar, P (2009) in Engineering Geology, Elsevier, Vol. 107, pp. 98-110.
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Typical Results by Choudhury and Savoikar (2009)
Effect of various types of foundations and
landfill combinations on MHA
Influence of landfill stiffness on MHA
Choudhury, D. and Savoikar, P (2009) in Engineering Geology, Elsevier, Vol. 107, pp. 98-110.
-100
-80
-60
-40
-20
0
20
40
0.0 0.2 0.4 0.6 0.8 1.0 1.2
Foundation soil
Landfill base
Maximum horizontal acceleration (g)
Landfill height - 20m
Base acceleration: 0.834g
Foundation: Type
Type (i): Rock
Type (ii): Sand underlain by rock
Type (iii):Soft clay and sand underlain by rock
Type (iv):Stiff clay, soft clay, sand underlain
by rock
Type (v): Sand, silty clay,very stiff clay, hard clay
and dense sand underlain by rock
Ele
vati
on
(m
)
-60
-40
-20
0
20
40
60
80
0.00 0.05 0.10
Ele
vati
on
(m
)
Maximum horizontal acceleration (g)
Foundation soil
Landfill base
Variable stiffness
Constant stiffness
Landfill stiffness Landfill height: 60m
Foundation : Type (ii) - Sand underlain
by rock
Base acceleration: 0.067g
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Comparison between DEEPSOIL and FLAC3D Results
of Ground Response Analysis for MSW Landfill
Variation of MHA with depth
Variation of Normalized Stress with depth
Savoikar, P and Choudhury, D. (2010) in Proc. of 6ICEG, New Delhi, Vol. 2, pp. 1325-1330.
0
10
20
30
40
50
0.0 0.5 1.0 1.5 2.0
Landfill base
7 3 8 4 62
1
FLAC3D
analysis resultsDEEPSOIL analysis results
40 m high landfill resting on type (i) foundation: rock
Ele
vati
on
(m
)
Maximum horizontal acceleration, (g)
1Kobe Eq. (0.8334g)
5Kobe Eq. (0.8334g)
2Loma Prieta Eq. (0.2778g) 6Loma Prieta Eq. (0.2778g)
3
Loma Prieta Eq. (0.067g) 7Loma Prieta Eq. (0.067g)
4Miyagi Oki Eq. (0.2265g) 8Miyagi Oki Eq. (0.2265g)
5
0
10
20
30
40
50
0 2 4 6 8 10
Landfill base
40 m high landfill resting on type (i) foundation: rockFLAC
3D analysis resultsDEEPSOIL analysis results
1Kobe Eq. (0.834g)
5Kobe Eq. (0.834g)
2Loma Prieta Eq. (0.278g)
6Loma Prieta Eq. (0.278g)
3Loma Prieta Eq. (0.067g)
7Loma Prieta Eq. (0.067g)
4 Miyagi Oki Eq. (0.2265g)
8Miyagi Oki Eq. (0.2265g)
Ele
vat
ion
(m
)
Normalized stresses (Shear stress/Effective vertical stress)
1243 5687
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Seismic Stability of Municipal Solid Waste (MSW) Landfill
Savoikar, P (2009) , PhD Thesis, IIT Bombay, Mumbai, India.
Forces acting on Hill
type MSW Landfill on
Sloping Base
2
2132121
121
23211
2
sin.sin.cos.1
tan.cos.sin..
tan.tan.cos.1
WWWWWkWWk
WWk
WWWk
FShv
h
v
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Seismic Stability of Municipal Solid Waste (MSW) Landfill
Savoikar, P (2009) , PhD Thesis, IIT Bombay, Mumbai, India.
Variation of Factor of Safety
with (L/H)
And
Yield Acceleration is
computed as,
0 2 4 6 8 100.8
1.0
1.2
1.4 = 50; S
1= S
2= 3;
15
Facto
r o
f sa
fety
, FS
L/H
kh = 0.2, k
v = 0
kh = 0.2, k
v = 0.5k
h
kh = 0.2, k
v = k
h
321
2
121
231
2
21
sintan.sin.cos.
tan.cos.sintan.cos.
1tan
WWWWW
WWW
k
k
v
h
)tan.1/(tan xky
hv kkx /
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Seismic Stability of Municipal Solid Waste (MSW) Landfill
Savoikar, P (2009) , PhD Thesis, IIT Bombay, Mumbai, India.
Comparison between results obtained using pseudo-static and
pseudo-dynamic approaches
0.1 0.2 0.30.5
1.0
1.5
2.0
2.5
kv =0
kv =0.5k
h
kv = k
h
Facto
r o
f safe
ty, F
S
Horizontal seismic acceleration coefficient, kh
kv =0
kv =0.5k
h
kv = k
h
Pseudo-dynamic method
S1= S
2= 2;
sw
s; ; 1 = sw ;
2 =
1
S1= S
2= 2;
sw
1 = sw ;
2 =
1
Pseudo-static method
0 2 4 6 8 100.0
0.1
0.2
0.3
0.4
0.5
Yie
ld a
ccele
rati
on
co
eff
icie
nt,
ky
L/H
S1= S
2= 2;
sw
1 = sw ;
2 =
1
Pseudo-static methodPseudo-dynamic method
kv = 0
kv = 0.5k
h
kv = k
h
S1= S
2= 2;
sw
s; ; 1
= sw ;2
=1
kv = 0
kv = 0.5k
h
kv = k
h
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Seismic Stability of Municipal Solid Waste (MSW) Landfill
Savoikar, P and Choudhury, D. (2010) in Waste Management, & Research Vol 28, 1096-1113
Forces acting on Side-Hill type MSW Landfill under Translational
mode of failure
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Seismic Stability of Municipal Solid Waste (MSW) Landfill
Savoikar, P and Choudhury, D. (2010) in Waste Management, & Research Vol 28, 1096-1113
Typical Results of Factor of Safety using Pseudo-
Static and Pseudo-Dynamic Approaches
Effect of fill amplification
on factor of safety
![Page 41: Geotechnical Earthquake Engineering · → Combined Pile-Raft Foundation (CPRF) Katzenbach et al. (2009) Settlements calculated for a shallow foundation: ... piled raft model 54 %](https://reader030.vdocuments.us/reader030/viewer/2022011818/5e8729ce7fce87065f0c87e1/html5/thumbnails/41.jpg)
Seismic Stability of Municipal Solid Waste (MSW) Landfill
Savoikar, P and Choudhury, D. (2010) in Waste Management, & Research Vol 28, 1096-1113
Effect of (B/H) on Factor of Safety and Yield Acceleration using
Pseudo-Static and Pseudo-Dynamic Approaches
![Page 42: Geotechnical Earthquake Engineering · → Combined Pile-Raft Foundation (CPRF) Katzenbach et al. (2009) Settlements calculated for a shallow foundation: ... piled raft model 54 %](https://reader030.vdocuments.us/reader030/viewer/2022011818/5e8729ce7fce87065f0c87e1/html5/thumbnails/42.jpg)
Seismic Stability of Expanded Municipal Solid Waste
(MSW) Landfill
Choudhury, D. and Savoikar, P. (2011) in Waste Management, & Research Vol 29, 135-145
Landfill model used for sliding stability analysis of MSW landfill
for under the berm failure using pseudo-static approach
![Page 43: Geotechnical Earthquake Engineering · → Combined Pile-Raft Foundation (CPRF) Katzenbach et al. (2009) Settlements calculated for a shallow foundation: ... piled raft model 54 %](https://reader030.vdocuments.us/reader030/viewer/2022011818/5e8729ce7fce87065f0c87e1/html5/thumbnails/43.jpg)
Seismic Stability of Expanded Municipal Solid Waste
(MSW) Landfill
Choudhury, D. and Savoikar, P. (2011) in Waste Management, & Research Vol 29, 135-145
Variation of factor of safety and yield acceleration
with back slope of berm
1V:5H 1V:4H 1V:3H1V:2.5H1V:2H1V:1.75H1V:1.5H1V:1.25H1.00
1.05
1.10
1.15
1.20
1.25
Pseudo-dynamic method Pseudo-static method
Hb= 10.0 m; Hb= 10.0 m
Hb= 7.5m; Hb= 7.5 m
Hb= 5.0 m; Hb= 5.0m
Av
era
ge f
acto
r o
f sa
fety
, FS
avg
Back slope of the berm
1V:5H 1V:4H 1V:3H 1V:2.5H 1V:2H1V:1.75H1V:1.5H1V:1.25H0.06
0.08
0.10
0.12
0.14
Pseudo-dynamic method Pseudo-static method
Hb= 5.0 m ; Hb= 5.0 m
Hb= 7.5 m; Hb= 7.5m
Hb= 10.0m ; Hb= 10 m
Av
era
ge y
ield
accele
rati
on
co
eff
icie
nt,
k y
,avg
Back slope of the berm
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IIT Bombay, DC 44
End of
Module – 9
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Deepankar Choudhury, IIT Bombay, Mumbai, India
* Former PhD Scholars: All my former 10 Ph.D. scholars
who completed Ph.D. at IIT Bombay, mainly, (i) Dr. Sanjay S.
Nimbalkar, (ii) Dr. Syed Mohd. Ahmad, (iii) Dr. Purnanand P.
Savoikar, (iv) Dr. V. S. Phanikanth, (v) Dr. Sumedh Y. Mhaske
(vi) Dr. Jaykumar C. Shukla and (vii) Dr. Sunil M. Rangari
who directly worked under by Main Supervision.
* Current PhD Scholars: All my on-going Ph.D. scholars who
are working at IIT Bombay, namely, (a) Mr. Amey D.
Katdare, (b) Mr. Ranjan Kumar, (c) Ms. Sarika Desai, (d) Ms.
Nisha Naik, (e) Ms. P. Shylamoni, (f) Mr. Kaustav Chatterjee
and (g) Ms. Reshma Raskar Phule, who are directly working
under my Main Supervision.
Acknowledgements
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D. Choudhury, IIT Bombay, India
Doctoral Theses (Completed)
@ Geotechnical Earthquake Engg. Lab, IIT Bombay
Dr. Sanjay S Nimbalkar (2007) Seismic analyses of retaining walls by
pseudo-dynamic method – Research Fellow at University of
Wollongong, Australia. (Supervised jointly with Prof. J.N. Mandal)
Dr. Syed Mohd Ahmad (2009) Seismic analyses and design of
waterfront retaining structures using pseudo-static and pseudo-
dynamic approaches – Lecturer at University of Manchester, U.K.
(Supervised alone)
Dr. Purnanand Savoikar (2009) Seismic behaviour of municipal solid
waste landfills – Head, Civil Engg. Dept., Govt. Polytech.,
Bicholim, Goa, India. (Supervised jointly with Prof. J.N.Mandal
who was Co-Supervisor)
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D. Choudhury, IIT Bombay, India
Doctoral Theses (Completed)
@ Geotechnical Earthquake Engg. Lab, IIT Bombay
Dr. Vivek B. Deshmukh (2010) Some studies on uplift capacity of pile anchors
and horizontal plate anchors – Associate Professor, Dept. of Structural
Engg., VJTI, Mumbai, India. (Supervised jointly with Prof. D.M.Dewaikar
who was Main Supervisor)
Dr. Vedula S. Phanikanth (2011) Ground response analysis and behaviour of
single pile in liquefied soils during earthquake – Scientist – G, Bhabha
Atomic Research Centre, Mumbai, India. (Supervised jointly with Dr.
G.R.Reddy of BARC who was External Co-Supervisor)
Dr. Raghu Nandan M. E. (2011) Effect on cyclic response and liquefaction
resistance due to desaturation of sand – Asst. Professor, Monash Univ.
Malaysia. (Supervised jointly with Dr. A. Juneja who was Main Supervisor)
Dr. Sumedh Y. Mhaske (2011) GIS-GPS based geotechnical studies for seismic
liquefaction hazards in Mumbai city – Head and Associate Prof., Dept. of
Civil Engg., VJTI, Mumbai, India. (Supervised alone)
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D. Choudhury, IIT Bombay, India
Dr. Ganesh S. Kame (2012) Analysis of a continuous vertical plate
anchor embedded in cohesion-less soil – Prof., Dept. of Civil Engg.,
Saraswati College of Engg., Kharghar, Mumbai, India. (Supervised
jointly with Prof. D.M.Dewaikar who was Main Supervisor)
Dr. Jaykumar C. Shukla (2013) Seismic hazard estimation and
ground response analysis for Gujarat region – Engineer at L&T
Surgent & Lundy, Surat, India. (Supervised jointly with Prof.
D.L.Shah of MS Univ. Baroda who was External Co-Supervisor)
Dr. Sunil M. Rangari (2013) Seismic uplift capacities of horizontal
and inclined strip anchors in cohesionless soil – Asst. Prof., Airoli,
Mumbai, India. (Supervised jointly with Prof. D.M.Dewaikar who
was Co-Supervisor)
7 more are continuing currently………………..
Doctoral Theses (Completed)
@ Geotechnical Earthquake Engg. Lab, IIT Bombay
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Deepankar Choudhury, IIT Bombay, Mumbai, India
* M.Tech. Students: My Former M.Tech. students who did
M.Tech. Dissertation under my supervision at IIT Bombay,
mainly, (i) Mr. Santiram Chatterjee, (ii) Ms. Somdatta Basu,
(iii) Mr. Rajeev Kumar Bharti, (iv) Ms. Deepa Modi, (v) Mr.
Mayukh Mukhopadhayay, (vi) Mr. Manoranjan Tripathy,
(vii) Mr. Debarghya Chakraborty, (viii) Ms. Gaytree
Dandekar, (ix) Ms. K. Sangeetha, (x) Ms. Ritika Sangroya.
Also my current M.Tech. students who are doing their
M.Tech. Dissertation at IIT Bombay under my supervsion,
namely, (xi) Mr. V. Dilli Rao, (xii) Mr. A. Sarin, (xiii) R. P.
Singh and (xiv) Mr. Ashutosh Kumar.
Acknowledgements (contd…)
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Deepankar Choudhury, IIT Bombay, Mumbai, India
* My Supervisor, Teachers in India: Prof. K. S. Subba Rao,
Prof. A. Sridharan, Prof. T. G. Sitharam, Prof. G. L. S. Babu,
Prof. J. Kumar, Prof. C. S. Manohar of IISc Bangalore.
And Prof. N. N. Som, Prof. R. D. Purkayastha, Prof. S. C.
Das, Prof. P. Bhattacharyay, Prof. S. P. Mukherjee of
Jadavpur University.
* My Collaborators in India: Prof. M. R. Madhav of JNTU
(IITK), Prof. J.N. Mandal, Prof. D.M. Dewaikar, Prof.
B.V.S.Viswanadham and Prof. S. Ghosh of IITB, Prof.
Priyanka Ghosh of IITK, Dr. G. R. Reddy, Dr. K. Bhargava
and Dr. A. K. Ghosh of BARC, Dr. P. C. Basu of AERB,
Prof. D. L. Shah of MSU Baroda, Prof. P. Samui of VIT,
Prof. G. Bhattacharyay of BESU, Prof. A. M. Krishna of
IITG, Prof. C. Ghosh of NDMA.
Acknowledgements (contd…)
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Deepankar Choudhury, IIT Bombay, Mumbai, India
* Collaborators from Outside-India: Prof. Jonathan D. Bray
of UC Berkeley USA, Prof. Buddhima Indraratna of
UoWollongong Australia, Prof. C. F. Leung of NUS
Singapore, Prof. R. Kitamura of Kagoshima Univ. Japan,
Prof. Rolf Katzenbach of TU Darmstadt Germany, Prof. S.
Bhattacharya of Univ. of Surrey UK.
* Significant Funding Agencies: AERB Mumbai, BRNS-DAE
Mumbai, INAE New Delhi, SERC-DST New Delhi, INSA New
Delhi, IRCC-IITB Mumbai, India.
And, Alexander von Humboldt Foundation, Bonn, Germany;
Japan Society for Promotion of Science, Tokyo, Japan;
UKIERI UK-India; Samsung C&T, Korea.
Acknowledgements (contd…)
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Deepankar Choudhury, IIT Bombay, Mumbai, India
* Special Thanks to Mr. Kaustav Chatterjee and
Mr. V. Dilli Rao (my current Ph.D. and M.Tech.
student), who helped me to prepare the slides and
editing the video content of this course. Also
thanks to all NPTEL staff and colleagues at IIT
Bombay.
Acknowledgements (contd…)