strai
wasmeasuredat017Themodulusofelasticityofsteelwassetequalto29000ksi200000MPaThebuildi
gwasscheduledtobedemolishedbyimplosio
Aspartofthedemolitio
processthei
fillwallswereremovedfromthefirsta
dthirdfloorsTherewas
oliveloadi
thebuildi
gAll
o
structuraleleme
tsi
cludi
gpartitio
splumbi
ga
dfur
iturewereremovedpriortoimplosio
O
lybeamscolum
sjoistfloora
di
fillwallso
theperipheralbeamswereprese
t
3Se
sorsCo
cretea
dsteelstrai
gageswereusedtomeasurecha
gesi
strai
sofbeamsa
dcolum
sLi
earpote
tiometerswereusedtomeasureglobala
dlocaldeformatio
sTheco
cretestrai
gageswere35i
90mmlo
ghavi
gamaximumstrai
limitof±002Thesteelstrai
gagescouldmeasureuptoastrai
of±020Thestrai
gagescouldoperateuptoaseveralhu
dredkHzsampli
grateThesampli
grateusedi
theexperime
twas1000HzPote
tiometerswereusedtocapturerotatio
i
tegralofcurvatureoverale
gthofthebeame
dregio
sa
dglobaldisplaceme
ti
thebuildi
gasdescribedlaterThepote
tiometershadaresolutio
ofabout00004i
001mma
damaximumoperatio
alspeedofabout40i
s10mswhilethemaximumrecordedspeedi
theexperime
twasabout14i
s035ms
11
f土木工程专业英语复习参考
4Fi
iteeleme
tmodel
12
f土木工程专业英语复习参考
Usi
gthefi
iteeleme
tmethodFEMamodelofthebuildi
gwasdevelopedi
theSAP20008computerprogramThebeamsa
dcolum
saremodeledwithBer
oullibeameleme
tsBeamshaveTorLsectio
switheffectivefla
gewidtho
eachsideofthewebequaltofourtimestheslabthick
ess5Plastichi
gesareassig
edtoallpossiblelocatio
swheresteelbaryieldi
gca
occuri
cludi
gthee
dsofeleme
tsaswellastherei
forci
gbarcutoffa
dbe
dlocatio
sThecharacteristicsoftheplastichi
gesareobtai
edusi
gsectio
a
alysesofthebeamsa
dcolum
sa
dassumi
gaplastichi
gele
gthequaltohalfofthesectio
depthThecurre
tversio
ofSAP20008is
otabletotrackformatio
ofcracksi
theeleme
tsI
ordertofi
dtheproperflexuralstiff
essofsectio
sa
iterativeprocedureisusedasfollowsFirstthebuildi
gisa
alyzedassumi
galleleme
tsareu
crackedThe
mome
tdema
dsi
theeleme
tsarecomparedwiththeircracki
gbe
di
gmome
tsMcrThemome
tofi
ertiaofbeama
dslabsegme
tsarereducedbyacoefficie
tof0355wherethedema
dexceedstheMcrTheexteriorbeamcracki
gbe
di
gmome
tsu
der
egativea
dpositivemome
tsare516ki
582kNma
d336ki
379kNmrespectivelyNotethat
ocrackswereformedi
thecolum
sThe
thebuildi
gisrea
alyzeda
dmome
tdiagramsarereevaluatedThisprocedureisrepeatedu
tilallofthecrackedregio
sareproperlyide
tifieda
dmodeled
Thebeamsi
thebuildi
gdid
othavetoprei
for
