SHEAR WALLS FOR HIGH RISE BUILDINGSCourse FacultyPresented By Prof.V.R.Shah Visanathan.!.B SD 1408

F A C U L T Y O FT E C H N O L O G Y

MASTERS PROGRAM IN STRUCTURAL DESIGN C E P TU N I V E R S I T Y , A H M E D A B A D.CONTENTSINTRODUCTIONCLASSIFICATION OF SHEAR WALLSBEHAVIOUR UNDER SEISMIC LOADINGLATERAL LOAD RESISTINGSYSTEMSCOMPARISON WITH SHEAR WALL AND MOMENT RESISTING FRAMESCAPACITY DESIGN OF CANTILEVER WALL SYSTEMCASE STUDYDESIGN OF RECTANGULAR TYPE WALLCONCLUSIONREFERENCESIN!RODU"!IONShear Wa## Shear wall represen he !"s e##$%$en sr&%&ral ele!en " a'e laeral #"r%e a%$n( "n a !&l$)s"re* +&$l,$n( an, " rans#er he! " #"&n,a$"n- Shear wall $s a sr&%&ral ele!en &se, " res$s laeral.h"r$/"nal.shear #"r%es parallel " he plane "# he wall +*0%an$le1er a%$"n #"r slen,er walls where he +en,$n( ,e#"r!a$"n $s ,"!$nan Tr&ss a%$"n #"r s2&a.sh"r walls where he shear ,e#"r!a$"n $s ,"!$nanWe cannot afford to build concrete buildings meant to resist severe earthquakes without shear walls. 00 Mar' F$nel3 a n"e, %"ns&l$n( en($neer $n USAIn$$all* shear walls are &se, $n re$n#"r%e, %"n%ree +&$l,$n( " res$s w$n, #"r%e- Earl$er 3all +&$l,$n( were !a,e "nl* #"r seel as +ra%$n(s " a'e laeral w$n, l"a,s %"&l, +e eas$l* pr"1$,e $n seel %"nsr&%$"n- H"we1er s%$en%eresen "+ser1a$"n ha1e %"ns$senl* sh"wn he e4%ellen per#"r!an%e "# +&$l,$n( w$h shear wall e1en &n,er se$s!$% #"r%e3 s&%h walls are n"w e4ens$1el* &se, #"r all earh2&a'e res$san%e ,es$(n- The !"s $!p"ran pr"per*"# shear walls #"r se$s!$% ,es$(n 3as ,$##eren #r"! ,es$(n #"r w$n, 3$s ha $ sh"&l, ha1e ("", ,&%$l$*&n,er re1ers$+le an, repeae, "1erl"a,s- Bes$,es he* $!par laeral s$##ness " he s*se! an, als" %arr* he (ra1$* l"a,-IN!RODU"!IONF"r +&$l,$n( "1er 56 s"r$es3 shear walls !a* +e%"!e $!pera$1e #r"! he p"$n "# 1$ew "# e%"n"!* an, %"nr"l "# laeral ,e#le%$"n-Shear wall nee, a,e2&ae #"&n,a$"n -he #"&n,a$"n "# "ne "# se1eral $nera%$n( sr&%&ral walls ,"es n" a##e% $s "wn s$##ness rela$1e " he "her wallsIN!RODU"!ION"LASSIFI"A!ION OF SHEAR WALLSS$!ple re%an(&lar *pe an, #lan(e, wallsC"&ple, wallsR$($, #ra!e shear wallsFra!e, wall w$h $n#$lle, #ra!esC"l&!n s&pp"r shear wallsC"re *pe shear walls SI$PLE RE"!ANGULE !%PE AND FLANGED &BARBELL !%PE'WALL The s$!ple re%an(&lar shear walls 3&n,er he a%$"n "# $n plane 1er$%al l"a,s an,h"r$/"nal shear al"n( $s len(h3 are s&+7e%e, " +en,$n( an, shear- Bar+ell *pe "# wall are #"r!e, when a wall $s pr"1$,e !"n"l$h$%all* +eween w" %"l&!n- The %"l&!ns a he w" en,s are hen %alle, he +"&n,ar* ele!ens- The +ar+ell *pe walls are sr"n(er an, !"re ,&%$le han he s$!ple re%an(&lar *pe "# &n$#"r! se%$"n- Als" he*ne1er #a$l $n shear +& "nl* +* *$el,$n( "# seel $n +en,$n(- One "# he ,$sa,1ana(e "# h$s *pe "# shear walls $s ha as hese walls are r$($, ,&r$n( an earh2&a'e he* ara% an, ,$ss$pae a l" "# ener(* +* %ra%'$n(3 wh$%h $s ,$##$%&l " repa$r-

"LASSIFI"A!ION OF SHEAR WALLSSIMPLE RECTANGLE AND BAR BELL TYPE FREE STANDING WALLS"LASSIFI"A!ION OF SHEAR WALLS"OUPLED SHEAR WALLSI# w" sr&%&ral walls are 7"$ne, "(eher +* rela$1el* sh"r span,rel +ea!s3 he s$##ness "# he res&lan wall $n%reases8 $n a,,$$"n he sr&%&re %an ,$ss$pae !"s "# he ener(* +* *$el,$n( he %"&pl$n( +ea!s w$h n" sr&%&ral ,a!a(e " he !a$n walls- I $s eas* repa$r hese %"&pl$n( +ea!s han walls- These walls sh"&l, sa$s#* he #"ll"w$n( w" re2&$re!ens0 The s*se! sh"&l, ,e1el"p h$n(es "nl* $n he %"&pl$n( +ea! +e#"re shear #a$l&re The %"&pl$n( +ea! sh"&l, +e ,es$(ne, " ha1e ("", ener(*),$ss$pa$"n %hara%er$s$%s "LASSIFI"A!ION OF SHEAR WALLS"LASSIFI"A!ION OF SHEAR WALLSFRA$ED WALLS WI!H INFILLED FRA$ESFra!e, walls are %as !"n"l$h$%all*3 whereas $n #$lle, #ra!es are %"nsr&%e, +* %as$n( #ra!es #$rs an, $n#$ll$n( $ w$h !as"nr* "r %"n%ree +l"%' laer-"OLU$N SUPPOR!ED SHEAR WALLS F"r ar%h$e%&ral reas"ns " ,$s%"n$n&e shear walls a #l""r le1el he wall " %arr* +* w$,el* spa%e, %"l&!n- In s&%h %"l&!n s&pp"re, shear wall3 he ,$s%"n$n&$* $n (e"!er* ha le1el sh"&l, +e spe%$all* a'en %are "# $n he ,es$(n"ORE !%PE SHEAR WALLSIn s"!e +&$l,$n( 3he ele1a"rsan, "her ser1$%e areas %an +e (r"&pe, $n a 1er$%al %"re wh$%h !a* ser1e as ,e1$%e " w$hsan, laeral l"a,s-"LASSIFI"A!ION OF SHEAR WALLSS9UAT STRUCTURAL WALLSSLENDER WALLORDINARY)MOMENT SHEAR WALLSDUCTILE)MOMENT SHEAR WALLSDUAL SYSTEMS"LASSIFI"A!ION A""ORDING !O BEHAVIOUR"LASSIFI"A!ION A""ORDING !O BEHAVIOURS(UA! S!RU"!URAL WALLSS2&a sr&%&ral walls w$h a ra$" "# he$(h " len(h "# less han 5 "r : #$n, w$,e appl$%a$"n $n se$s!$% #"r%e res$san%e "# l"w)r$se +&$l,$n(- In h$s walls $n wh$%h ,e#le%$"n an, sren(h are %"nr"lle, +* shear- SLENDER WALLSlen,er wall &s&all* ha1e a he$(h " len(hra$" $s (raer han 5- The* +eha1es l$'e a 1er$%al slen,er %an$le1er +ea!-ORDINAR%)$O$EN! SHEAR WALLSOr,$nar* !"!en shear walls $n wh$%h ,e#le%$"n an, sren(h are %"nr"lle, +* #le4&re- These are &s&all* h$(h r$se shear walls " res$s h$(h w$n, an, %*%l"nes-DU"!ILE)$O$EN! SHEAR WALLSD&%$le ;!"!en shear walls are spe%$al walls !ean #"r se$s!$% re($"n an, wh$%h ha1e ("", ener(* ,$ss$pa$"n %hara%er$s$%s &n,er re1ersal l"a,s-DUAL S%S!E$S When laeral #"r%e res$san%e $s pr"1$,e, +* he %"!+$ne, %"nr$+&$"n "# #ra!es an, sr&%&ral walls3 $ $s %&s"!ar* " re#er " he! as a ,&al s*se! D&%$le #ra!es3 $nera%$n( w$h walls %an pr"1$,e a s$(n$#$%ana!"&n "# ener(* ,$ss$pa$"n 3par$%&larl* $n he &pper s"r$es "# a +&$l,$n( -"n he "her han, 3as a res&l "# he lar(e s$##ness "# walls3 ("", s"r* ,r$# %"nr"l ,&r$n( an earh2&a'e"LASSIFI"A!ION A""ORDING !O BEHAVIOURBEHAVIOUR UNDER SEIS$I" LOADINGDepen,$n( "n he he$(h " w$,h ra$" 3 a shear wall !a* +e +eha1e as a slen,er wall a s2&a wall "r a %"!+$na$"n "# w"-In slen,er wall pr$!ar* !",e "# ,e#"r!a$"n $s +en,$n(- Shear ,e#"r!a$"n are s!all an, %an +e ne(le%e, -Fle4&re sren(h &s&all* ("1erns he ,es$(n "# s&%h wall -The* are &s&all* s&+7e%e, " l"w n"!$nal shear sress- The* ,e1el"p a pre,"!$nanl* h"r$/"nal %ra%' paern $n he l"wer h$n($n( re($"n a#er a #ew %*%le "# $nelas$% ,e#"r!a$"n S2&a wall sh"w s$(n$#$%an a!"&n "# shear ,e#"r!a$"n as %"!pare, " +en,$n( ,e#"r!a$"n- Shear sren(h &s&all* ("1erns he ,es$(n "# s&%h walls- The* are &s&all* s&+7e%e, " h$(h n"!$nal shear sress- The* ,e1el"p $n%l$ne, %ra%'s $n he we+ ha #"r! a ,$a("nal%"!press$"n sr& s*se! #"r ea%h ,$re%$"n "# l"a,$n(-BEHAVIOUR UNDER SEIS$I" LOADINGLO"A!IONOF SHEAR WALL IN A BUILDINGShear walls are &s&all* pr"1$,e, +eween %"l&!n l$ne3 $n sa$r wells3 l$# wells an, $n sha# - When ,es$(n #"r w$n, l"a,$n( he l"%a$"n "# he wall w$h $n he +&$l,$n( plan ,"es n"pla* an $!p"ran r"le- In%ase "# se$s!$% l"a,$n( 3h"we1er 3wall l"%a$"n are a %r$$%al #a%"r -Un,er w$n, l"a,$n( a #&ll* elas$% resp"nse $s e4pe%e, 3wh$le ,&r$n( sr"n( earh2&a'e s$(n$#$%an $n elas$% ,e#"r!a$"n are an$%$pae, -A wall %"n#$(&ra$"n wh$%h has 1er* l$le e%%enr$%$* +eween he %enre "# +&$l,$n( !ass an, s$##ness an, res&ls $n a reas"na+l* &n$#"r! ,$sr$+&$"n "# $nelas$% ,e#"r!a$"n &n,er se$s!$% l"a,$n( F"r he +es "rs$"nal res$san%e 3as !an* "# he walls as p"ss$+le sh"&l, +e l"%ae, a he per$pher* "# he +&$l,$n(LA!ERAL LOAD RESIS!INGS%S!E$S FINTEL HANDBOO>GUIDE TO SELECTION OF STRUCTURAL SYSTEMS STRUCTURAL SYSTEMNUMBER OF STORIES OFFICE BUILDINGAPPART MENTBUILDINGS 3HOTELS3ETCFra!e&p "