orcrackformatio
1Assumi
gthei
fillwallsareli
eara
du
crackeda
o
li
eartimehistorya
alysisisru
Notethatplastichi
gesexisti
thebeameleme
tsa
dthesegme
tsofthebeameleme
tswheremome
tdema
dexceedsthecracki
gmome
thaveareducedmome
tofi
ertia2Thecracki
gpatter
i
thei
fillwallisdetermi
edbycompari
gstressesi
theshellsdevelopedduri
gthea
alysiswiththete
silestre
gthofi
fills3Nodesareseparatedatthelocatio
swherete
silestressexceedste
silestre
gthThesestepsareco
ti
uedu
tilthecrackregio
sareproperlymodeled42ModelBi
fillsmodeledbystrutsI
fillwallsarereplacedwithcompressivestrutsasdescribedi
FEMA35610guideli
esOrie
tatio
softhestrutsaredetermi
edfromthedeformedshapeofthestructureaftercolum
removala
dthelocatio
ofope
i
gs43Colum
removalRemovalofthecolum
sissimulatedwiththefollowi
gprocedure
15
f土木工程专业英语复习参考
1Thestructureisa
alyzedu
dertheperma
e
tloadsa
dthei
ter
alforcesaredetermi
edatthee
dsofthecolum
swhichwillberemoved
2Themodelismodifiedbyremovi
gcolum
sA2a
dA3o
thefirstfloorAgai
thestructureisstaticallya
alyzedu
derperma
e
tloadsI
thiscasethei
ter
alforcesatthee
dsofremovedcolum
sfou
di
thefirststepareappliedexter
allytothestructurealo
gwithperma
e
tloadsNotethattheresultsofthisa
alysisareide
ticaltothoseofstep1
3Theequala
doppositecolum
e
dforcesthatwereappliedi
theseco
dsteparedy
amicallyimposedo
thee
dsoftheremovedcolum
withi
o
emilliseco
d11tosimulatetheremovalofthecolum
sa
ddy
amica
alysisisco
ducted
44Compariso
ofa
alyticala
dexperime
talresultsThemaximumcalculatedverticaldisplaceme
tofthebuildi
goccursatjoi
tA3i
theseco
dfloorFig7showstheexperime
tala
da
alyticalModelAverticaldisplaceme
tsofthisjoi
ttheAEMresultswillbediscussedi
the
extsectio
Experime
taldataisobtai
edusi
gtherecordi
gsofthreepote
tiometersattachedtojoi
tA3o
o
eoftheire
dsa
dtothegrou
do
theothere
dsThepeakdisplaceme
tsobtai
edexperime
tallya
da
alyticallyModelAare0242i
61mma
d0252i
64mmrespectivelywhichdiffero
lybyabout4Theexperime
tala
da
alyticaltimescorrespo
di
gtopeakdisplaceme
tare0069sa
d0066srespectivelyThea
alyticalresultsshowaperma
e
tdisplaceme
tofabout0208i
53mmwhichisabout14smallertha
thecorrespo
di
gexperime
talvalueof0242i
61mmFig8comparesverticaldisplaceme
thistoriesofjoi
tA3i
theseco
dfloorestimateda
alyticallybasedo
ModelsAa
dBAsca
besee
modeli
gi
fillswithstrutsModelBresultsi
amaximumverticaldisplaceme
tofjoi
tA3equaltoabout045i
114mmwhichisapproximately80largertha
thevalur