Duk

(Common to B.E.

Tirae : Three hours.

cory

Reg. No. :

Question Paper Code :'L3243

:

RegalaH,on 2005)

Maxinilm: 100 markeUse of IS 1E99, 4826 and IA9ZO codes dre permittd.

. Answer ALL questions.

PART6-(I0 xZ=Z}marka)1. Defi.ne dynamic degree of freedom2. How can the damping factor be used to identifr the t\ee tlpes of dampirig?3. Defi.ne principal mode of vibration.

. .

4. What is superposition?5. Differentiate between seisrnic hazard and geismic risk.6. Whai is intraplate earthquake? Give two examples.7. What'type of confining reinforcoments ie to be ueed when the diotance between

corner rods in a column exceeds 800 mm?

State the basic concept of capacity d.esign.

\Mhat is content damage that is associated with base isolation?

Name the different methods of vibration control techniques.

8.

9.

10.

PARTB-(6x 16=80marks)11. (a) A vibrating eyotem consists of a mass 90 N; spring stiffness 200 N/m and'

" davnper with a damping coefficient of 8 N sec/m. Determine the

damping factor, natural dunrpod froquoncy und logrrrithtttir: tlccrctttottt.

Or

(b) Derive the governiag Bxpression of moiion for a SDOF system through amathematical model of an actual structure of your choice.

t2. (a) Explain the methods of determining the fundamental frequency ind:rnamic analysis of a Iv(DOF system.

Or

(b) Determine the fr.rst and second mode of natural frequency of a two storey, shear brulding shown in Figure 1. The system parameters. ale

lble data if necessary.m = 280 kI.I, stihess k = 2000 kN/m. Assume suiti

, ,. '-_:- .Figurel

13. (a) B4plain- with neat sketches, the seismometers used, for velocity and,displaeement meaguroments.

(1*vf

&) List and explain the reasons for the iause of earthquake induceddduages in RCC buildings with vertical irregularities.

2 L3243

lvL14' G) G)

*nl}fl,'.he proced'ure for the construcrioa of eire epecific response(ii) Determine the totar base sl:ar for a Eve et$syhospitar uuuarns:?RCC &ame in coimbatore. Floors "r" "pa."a at 9.60 m and the totalheighr of the building- is i;.;d; tul ground level. AII the floorshave equal dead and-Iivej";G;;dtN which is iumped at rhecentre of each flocr. soil betow trr" ro-"ia"ti'";;ili"e'##n soit. (8)

Or(t') Explain rvith neat'sketches at reast three ways to etrengthen a soils.uscep tible to liquefaction.15' (a)

ffi::ffiTrrequirements to be sarisfied by the soil and structure to be

Or&) f;1fl?rtliu'li!*'"step procedure suggested, for aseismic design or a

18248

1.

2.

3.

4.

5.

6.

7.'

tq)Reg. No..:

B. E-TB.TECh. DEGREE EXUMIIIIATION, APRII/ITTAY 201 1.

Ciyil Engineering

CE r4O3 -

BASIICS OF DYNATIICS AriID ASNIS:rNC DESIGN(Regulation 20Of)

(comrnon to B.E. (part Time) sirtb sereesten n"grt"tico z0os)fime: Three houra

AngwerAlil questions.PARTA- (10 x2=2Cnarks)

Define equivalent viscous damping.

Write a shortnote ou earthquake excitation.

Enunerate dyaamic equilibrium

Defrne traneitional groutrd motion'I

. Whatis the importance of ieoseiemal map?

Bxplain geological fault.

What ig disastrous earth quakee?

9' what are the infoimation requiied for thr seisnic svaluatsd buildiDg?10. Enuinerate shear flenrre failurs.

'iI

,l,1

$,1?i';

I

I

IiIIl{tl

f.

Writo the eguation Epveming the free vibration of the Bystem shownbelow in Sig.'1, 2 and 8.Assume the beam to b maesless, each Bystom has a single DoF defineda9 the vrtical deflection under tho weight "1[p. The f,enual rigidity ofthe beam ii E[ dnd the lenbth is "L".

Fig. I

hlFis.B

'OrO) writs tho equation of aotion for tho one storuy, one bay &auie shoyn in

Fig. 4. tho fiexqra!dgl.dity _of the beam and coiuron ie noted. The luuped

- BaBs at the beam ir'B'. otherwige, aseume the &ame to be masEliesand neglect danping. C0r1onentonthe efrestofbage frxity. . ------(16)

1lllr,l

r.

.+pft)

2 66919

l>{12' (a) Formulat! th9 eeuations of motion of the eyetem of ng. 6 with the twoDOF8 defined at the centre of mass 'Ol of ihe rigid b; -transla6on u,andnotation uo. (10

Fig.E

Or(b) Explain the concept of mode euperpoaition techniqus applicable to II,IDOF

13. (a) Briefly erplain piate tectonica and lithospheric plates.Or

(b) niphia the foliowing:(, T;pes of seisnic waveg(D Effect of the surface topoefaphy(iti) Leseone leamt from past earth$ules

(10

structureeduringearthgtrakee ..' I '. .i. 1 - :

,'(16)

(6)(CI(4)

14. (a) Explain the causee of damage of BC ehrcttrres dtuiag darthquakes adsuggest improvenents that may help io riVer come conuoop faiiuree of BC

(b) (,(ii)

15. (a) (,(ir)

I:

'l

(b) (,(ii)

OrWhat, are the applications of baee ieolation?Explain the principle of capacity doign.

(8)(8)

66219

Reg. No. :

B.E./B.Tech. DEGBEE DGMINAfiON, t{ov:nMgERoEcEI\,IBEB 2010.Seventh Semester i

Civil Engineering

CE 1403 -

BASICS Or DiNAil,[CS AI{D ASEIfil,fiC DESIGN(fiegulation 2004)

(common ro B.E (part Ttme) sixth semeaterR4guladon 200s)Time: Three hours Maximrrm : 100 mstks

GS 4326 and IS 19920 codea ars pemitted)

1.

2.

3.

4.

5.

o.

AnsurerAlL qr.otio*. i

. PABTA-(10 x2=.Z}marks)Write a shori note on static and dynamic forcee.

Define SDOF idealisation.

V/hat ig Natural Flequency?

Give the concept of mode super posiiion.

Lrst any two causes of Earthquake.

Define Seismogram.

What is the importance of ductility?

Briefly write on liquefaction of soils.

Define Shear-Flexure failure

7.

8.

9.

t0' Give any two important points in mitigating effocts of Earthquake on atructures.

r11. (a)

12. (a)

o)

PARI, -

1lsf, = 8o marks)

Qulf" the equation of motion for the frame shown in Fig. l. The flexuralrigidity of the beam and crlumnn ie au notod. rhe maas lumpod nt thebeam is n : othemiae, aggume the frame to ue mar"less and neglectdamping.

Fis.t.or

P:{r" the eq.ation gr-tE disprracement reeponse of a viscously danpedSDOF system due to initisl r"lirityi" (0) for i!r*" """""(l) Under dauped ayatema(ii) Critically da",oed eystems(iii) over ria,ped eyetems. plot u(t)+ u(o)t woaganist t/?.fora=0.iJanri2

Determins the nair'ql viilration ftequoncy gf the inverted L - ehapedhame showD in Fig. I u"i"e tb" rh"p. i dtilA; iy tne deflectionaduo !o a vnrtical force at tuitee e"a. Negr*t deformations due to ehosraud arial force.

FIie.2.Cr

2 31,.52

'l(b) A pulsating force p(t) =p6cusot travels acrross the bridge of Flg. B ahownbelow, at a unilorm velocity of v ae shown in Fig. o. n"rJr-i"" ,"equation for the deflection at midspan as a fuDstiin of time. N"gl;damping and aosume the shape fundon ""

ft Fri"illf,l .

mlELL

-----tl

13. (a)

(b)

t4. (a)

(b)

15. (a)

l.-

Explain response behaviour and ductility demand in multistorcy5rrildinge with neat sketch.what are the effects of base isolation? Erplain with euitable examples.

Or(b) Explain the important points in miiigating the efiects of earthquake onstructures

Fis.3.

Pte;

Fig.'4.

Exptain causes of Earth quakes and Georogicar faurts.Or

(r) List out sorDe past

Beg. No. I

B. E-rB.Teeh. DE*BEE ElrAMNATroN, **n, 2010.

Seventh Semeaterglrril nngrneedug

I

CE r4O3 _ BASICS Or DYNAIIfiCS AND ASEI$,,C DESIGN(Regdation 2OO4)

(common to B'E'(Part'fime) sixth semeeter civil r'ngineerinbneguration 2005)

(Lrse of IS 26 aad IS tB9Z0 Codes is prmitr+d)

AnsurerAll questions.PARTA_ eO x2= 20 marks)

lVhat are the different types of d;mamic loldiryu?Compare: overdamping and underdamping syatenstrtee vibration is an eigen valua problem

- Jgst&\frhqt is the adr.antage of Mode Superpoeitioa method?Define the telms : Epiijntre and ll5pocenhe.Draw a neat sicetch of a eeismogram and nrme the parte.7, What ie a responee spectnrm?

8. Wfrat ie meant by liquefaction of soi!?I

9' Ifrl# various factorg which rnfluences do"tility of a rreinforced oorcrsroir0. Explain how a buildins confinr r-__

- r .

i

""a,ti.ri-*o.entratioi d;;;*H?.*Hl be ptanned ro mrnrrntre "**/

/I

irs.;,4f,;i

1.

64

3.

4.

o.

6.

7PABT B_ (S x 16 = 80 marks)l1' (a) A weight attached to a epring stiffness of 5 kN/m has a viscous dampingdevice. whea the weigbt was displaced and rereased, the period ofvibration wae found to bo z seconds

"rra it

" ratio of the consecutiveamplitudes was 4.s to 1.2. Determine the i"*p"a naturar-f"un.r"r"r,

"Tfrt:i::ir[}:"teht' amputude and pt'"r" when a force or 4 sin 4t

(b) using Duhamel's t*r, frnd the resllonse for the forced vibration phaseof the sDoF eyatero shown for zero initial con

o)

tllobtsin the fteguencies and mode shapes for the sJ,"te' showD in Eg e.rz (b).Assuloe rod' to be ridd and massless. IDgth of tho tod iB r and distance ofthe springftom the fixed end is o. {

ris.e. 12.O)

13. (a) . Explain the tectonic plate theory in detail.

Or

(b)

74. (a)

(b)

15. (a)

write elaborately on BoBe of the dieashous earihg,akee.

Explain in brief the concept of design Bpectrum with aketcbes.'jtJ*lJ ;: " 'd;:sl:

' ' --

,ti.,; ,.. r.i1t; !,111irf i r . , j. rrilE:rplain the effdct of soil properties and damping ddn'g earthErate.

rt each floor level for the BC.h.L,ftame of a reeidential building ehown for the r"u".rrrg a"t* u*Response spectrum method of IS 1g9& Z(/|)Z.Seismic weight on each floor : 2fi) kN

:

j

II

i

Spacing between columns

Height of each floor

: 4 mc/c

: 3m

Il ude

-"

i. :..IlDeof.Eltructurs,, ', .l

':' ' Lbcatio" irftLdbuildinb ,

I!rye of eoilStirnees of each oolumnr

Ordirraty moment resisting frameChennai

nock

& =0.5 xl07 N/E

II

2

Lq

Natural ftequency(rad/sec)

9.86

..27.5839.91

Mode shapesxl X2 x3

1.000 0.802 0.4451.0c0 .-0.551 _ t.2551.000

-{.451 1.750

r i'

OrP,riie a detailed note on h\e difiereut gryes of base isolation techniqueswith neat ghetches.

,

D 2106

Seventh *-**,,i,.',Ciyil f,r

,..i..(Comreon to B.8.,(partl,I

-jifief,

PABTertroj

'I

1.

2.

3.

4.

5.

6.

7.

8.

9.

Defrae trpnsient vibration. '

Define Coulomb damping.

*-ri;J";i. ,i

'r:il: 1i:g1i

10.

l-7

' ..".1..,,,'.,,1;.: }er';

" i ' PAET B- (5 x 16 = 80 markg)

,1(a) A mags h'is euspe1ded from a beam as ghown in the 6e. 1. Il[e beam isof negligible nqsps and has a uniforu flexual rigidity 'EI'. Find thenatural fteqtons!, of the sSntem.

11.i

!lt

rayateu ie showu b Fig.'z. Alt the uaeses are$ifi+qpi|q'fdt8 . Deiive the eqtrafins of motion in terms of

'r1j;*'qndf*, of the maseee-al,oqg the aris of the springs.

-'?z"l?)Fie.2

.1.t'.I

38250

v#*w

r8. (a)

o)

14. (a)

15. (a)

Y!u' meaadr6,

O.r

Defins rsslronso BpocArB"spectra with neat skitah.

(b)

Or(b) what are the methods used to q$ry" carthquskl_rysietant etmcturcs?Explaia the procedure or""[ neooa" ; p"riffi;99 :2062.

rllti

i. ll

3

,:r{ll;:.1'$

I

rl'!,

, -r1

88250

B.EYB.TCC' DEGREE D.^IUN/{MON, IT{AY/JUNE 2072.Seventh Seuiester

I'

Civil Engineering , ..r

CE I.403/ CE IOZZ _ BASICS OF D}NViMI;S A,I{D ASNTMAC DESIGN-_ ^

- -_*vp4,1\LI

Gegulation 2004)(common to B.E. (parhTime) sixth semester*egiriation 2005)

Time : Three hourslaggnun : 100 aarks

..

Answer.ALL quesHons.. !1

.-t '.

pARTA_(fOx2=pomaike , ;,. .Define aaplitude1.

o

3.

4.

5.

6.

7.

8.

9.

10.

Define'phase'difference,.

an stend I rrre;rimspacceieraticn of L0m/s"c-fUa Ai=#nt,r:m displacemdnt _di.pfi ;"u_rr

Differentiale Epiientre aud Hypocentre.Explain,Richter, magnitude scale,.IIow will you construct response spectrun diagram? :Briefly explain the importance of duct,ity in earthquake registaiie design.

%1t are the types of dampers nomany ruea to'orti vibrations duinbearthquahes. r--- -.-. ,r:

pARTB-(5x16=rJr"ffi,11. (a) A mass of lkg is to be supported on a spring having a stiffness of 9800

N/m, the damping co-efficient is 5.9 N-sedm. Determine the naturalfrequeucy of tlbe system. Find also ttre logarithmic decrement and theamplitude after three cycles, ffthe initial displacement is 0.30cm.

Or

(b)

L2. (a)

Derive the solution of equation of mction of SDOF system for dampedfree vibrationg.

Obtain the threa natural frequencies and the corresponding mode shapesfor the three degree of freedom system shown in figure.l.

Figure: 1

Or(b) Determine the natural frequencies and modes of the system shown in

figrue.2.

fi-z-

d-r

Figue:2

2

:'fA"

.?"

/7/13' (a)

llf;i:ffiBmagnitude and inteeritv eqplain anv one tvpe of maguitude

Or(b) ' Define the termg and write short notee on:

(i) Seismograao(ii) p_waves and S-waves(iii) El,astic rebound theory(iv) Spectral aiceleration..

14' (a) Define response spectrum. Elnlain the conoepts and typee of respousespectrum and alsb explain it" "Urr"itcris#.Or

(b)

15. (a)

How will you implove duct,ity *trT*je of RC structuroa at beam-column junction? Explain with; o"ut rt"t"l.3oflt"3:se isolaticn' Explain the ba-se ieoratioa l"chniqueo with neat

Or

studies of mitigating ef[ects of earthquake ob(b) Explain any fwo case

structgres.

!'

{.^.1

I

602023