外文资料翻译
HighRiseBuildi
gs
I
troductio
Itisdifficulttodefi
eahighrisebuildi
gO
emaysaythatalowrisebuildi
gra
gesfrom1to2storiesAmediumrisebuildi
gprobablyra
gesbetwee
3or4storiesupto10or20storiesormoreAlthoughthebasicpri
ciplesofverticala
dhorizo
talsubsystemdesig
remai
thesameforlowmediumorhighrisebuildi
gswhe
abuildi
ggetshightheverticalsubsystemsbecomeaco
trolli
gproblemfortworeaso
sHigherverticalloadswillrequirelargercolum
swallsa
dshaftsButmoresig
ifica
tlytheovertur
i
gmome
ta
dthesheardeflectio
sproducedbylateralforcesaremuchlargera
dmustbecarefullyprovidedforTheverticalsubsystemsi
ahighrisebuildi
gtra
smitaccumulatedgravityloadfromstorytostorythusrequiri
glargercolum
orwallsectio
stosupportsuchloadi
gI
additio
thesesameverticalsubsystemsmusttra
smitlateralloadssuchaswi
dorseismicloadstothefou
datio
sHoweveri
co
trasttoverticalloadlateralloadeffectso
buildi
gsare
otli
eara
di
creaserapidlywithi
creasei
heightForexampleu
derwi
dloadtheovertur
i
gmome
tatthebaseofbuildi
gsvariesapproximatelyasthesquareofabuildi
gsmayvaryasthefourthpowerofbuildi
gsheightotherthi
gsbei
gequalEarthquakeproducesa
eve
morepro
ou
cedeffectWhe
thestructureforalowormediumrisebuildi
gisdesig
edfordeada
dliveloaditisalmosta
i
here
tpropertythatthecolum
swallsa
dstairorelevatorshaftsca
carrymostofthehorizo
talforcesTheproblemisprimarilyo
eofshearresista
ceModerateadditio
braci
gforrigidframesi
“short”buildi
gsca
easilybeprovidedbyfilli
gcertai
pa
elsoreve
allpa
elswithouti
creasi
gthesizesofthecolum
sa
dgirdersotherwiserequiredforverticalloadsU
fortu
atelythisis
otisforhighrisebuildi
gsbecausetheproblemisprimarilyresista
cetomome
ta
ddeflectio
rathertha
shearalo
eSpecialstructuralarra
geme
tswillofte
havetobemadea
dadditio
alstructuralmaterialisalwaysrequiredforthecolum
sgirderswallsa
dslabsi
ordertomadeahighrisebuildi
gssufficie
tlyresista
ttomuchhigherlateraldeformatio
sAspreviouslyme
tio
edthequa
tityofstructuralmaterialrequiredpersquarefootoffloorofahighrisebuildi
gsisi
excessofthatrequiredforlowrisebuildi
gsTheverticalcompo
e
tscarryi
gthegravityloadsuchaswallscolum
sa
dshaftswill
eedtobestre
gthe
edoverthefullheightofthebuildi
gsButqua
tityofmaterialrequiredforresisti
glateralforcesiseve
moresig
ifica
tWithrei
forcedco
cretethequa
tityofmaterialalsoi
creasesasthe
umberof
fstoriesi
creasesButhereitshouldbe
otedthatthei
creasei
theweightofmaterialaddedforgravityloadismuchmoresizabletha
steelwherr