g
isalsousedi
DOD2Althoughthei
directdesig
methodca
reducetheriskofprogressivecollapse67estimatio
ofpostfailureperforma
ceofstructuresdesig
edbasedo
suchamethodis
otreadilypossibleO
eapproachbasedo
directdesig
methodstoevaluateprogressivecollapseofstructuresistostudytheeffectsofi
sta
ta
eousremovalofloadbeari
geleme
tssuchascolum
sGSA1a
dDOD2regulatio
srequireremovalofo
eloadbeari
geleme
tTheseregulatio
saremea
ttoevaluatege
erali
tegrityofstructuresa
dtheircapacityofredistributi
gtheloadsfollowi
gseveredamagetoo
lyo
eeleme
tWhilesucha
approachprovidesi
sightastotheexte
ttowhichthestructuresaresusceptibletoprogressivecollapsei
realitythei
itialdamageca
affectmoretha
justo
ecolum
I
thisstudyusi
ga
alyticalresultsthatareverifiedagai
stexperime
taldatatheprogressivecollapseresista
ceoftheHotelSa
Diegoisevaluatedfollowi
gthesimulta
eousexplosio
sudde
removaloftwoadjace
tcolum
so
eofwhichwasacor
ercolum
I
ordertoexplodethecolum
sexplosiveswerei
sertedi
topredrilledholesi
thecolum
sThecolum
swerethe
wellwrappedwithafewlayersofprotectivematerialsTherefore
eitherairblast
orflyi
gfragme
tsaffectedthe
9
fstructure
土木工程专业英语复习参考
2Buildi
gcharacteristics
HotelSa
Diegowasco
structedi
1914withasoutha
exaddedi
1924Thea
exi
cludedtwoseparatebuildi
gsFig1showsasouthviewofthehotelNotethati
thepicturethefirsta
dthirdstoriesofthehotelarecoveredwithblackfabricThesixstoryhotelhada
o
ductilerei
forcedco
creteRCframestructurewithhollowclaytileexteriori
fillwallsThei
fillsi
thea
exco
sistedoftwowytheslayersofclaytileswithatotalthick
essofabout8i
203mmTheheightofthefirstfloorwasabout190800600mTheheightofotherfloorsa
dthatofthetopfloorwere100600320ma
d1601000513mrespectivelyFig2showstheseco
dfloorofo
eofthea
exbuildi
gsFig3showsatypicalpla
ofthisbuildi
gwhoserespo
sefollowi
gthesimulta
eousremovalexplosio
ofcolum
sA2a
dA3i
thefirstgrou
dfloorisevaluatedi
thispaperThefloorsystemco
sistedofo
eway
10
f土木工程专业英语复习参考
joistsru
i
gi
thelo
gitudi
aldirectio
NorthSouthasshow
i
Fig3Basedo
compressio
testsoftwoco
cretesamplestheaverageco
cretecompressivestre
gthwasestimatedatabout4500psi31MPaforasta
dardco
cretecyli
derThemodulusofelasticityofco
cretewasestimatedat3820ksi26300MPa5Alsobasedo
te
sio
testsoftwosteelsampleshavi
g12i
127mmsquaresectio
stheyielda
dultimatete
silestre
gthswerefou
dtobe62ksi427MPaa
d87ksi600MParespectivelyThesteelultimatete
siler