畢業(yè)設(shè)計(jì)(論文)外文資料翻譯系別：建筑工程系專業(yè)：土木工程班級：B090701姓名：胡延明學(xué)號：B09070111外文出處：中國學(xué)術(shù)前沿期刊網(wǎng)附件：1.原文；2.譯文2013年01月05日原文：MethodsforProgressiveCollapseAnalysisofBuilding

StructuresUnderBlastandImpactLoadsAbstract：Progressivecollapseofbuildingstructuresunderblastandimpactloadshasattractedgreatattentionallovertheworld．Progressivecollapseanalysisisessentialforaneconomicandsafedesignofbuildingstructuresagainstprogressivecollapsetoblastandimpactloads.Becauseofthecatastrophicnatureofprogressivecollapseandthepotentiallyhighcostofconstructingorretrofittingbuildingstoresistit，itisimperativethattheprogressivecollapseanalysismethodsbereliable.Forengineerstheirmethodologytocarryoutprogressivecollapseuationneednotonlybeaccurateandconcise，butalsobeeasilyusedandworksfast．Thus，manyresearchershavebeenspendinglotsofeffortindevelopingreliable，efficientandstraightforwardprogressivecollapseanalysismethodsrecently.Inthepresentpaper，currentprogressivecollapseanalysismethodsavailableintheliteraturearereviewed．Theirsuitabilityapplicabilityandreliabilityarediscussed．Ourrecentproposednewmethodforprogressivecollapseanalysisofreinforcedconcreteframesunderblastloadsisalsointroduced．Keywords：progressivecollapseanalysis；buildingstructures；blastload：impactload

Progressivecollapseisdefinedas“thespreadofaninitiallocalfailurefromelementtoelementresultinginthecollapseofanentirestructureoradisproportionatelylargepartofit”.Itreferstothefailureofoneoragroupofkeystructuralload—carryingmembersthatgiverisetoamorewidespreadfailureofthesurroundingmembersandpartialorcompletestructuralcollapse．Progressivecollapseofbuildingstructuresmightbeinducedbyaseriesofaccidentalandintentionaleventssuchasfalseconstructionorder，localfailureduetoaccidentaloverload，damageofcriticalcomponentbyexplosionandearthquake．Thispaperonlyfocusesonprogressivecollapseanalysisofbuildingstructuresinducedbyabnormalloads，suchasblastandimpact．

WiththerecentprogressivecollapseofAlfredP．MurrahFederalBuildingandworldTradeCenter(WTC))researchesaremorefocusedthaneveronconstructingbuildingssaferfromprogressivecollapseinducedbyblastandimpactloads．Progressivecollapseanalysisisessentialforaneconomicandsafedesignofbuildingstructuresagainstprogressivecollapsetoblastandimpactloads．Becauseofthecatastrophicnatureofprogressivecollapseandthepotentiallyhighcostofconstructingorretrofittingbuildingstoresistit，itisimperativethattheprogressivecollapseanalysismethodsbereliable．Forengineers，theirmethodologytocarryoutprogressivecollapseuationneednotonlytobeaccurateandconcise，butalsobeeasilyusedandworksfast．Thus，manyresearchershavebeenspendinglotsofeffortindevelopingreliable，efficientandstraightforwardprogressivecollapseanalysismethodsrecently．

Thecurrentavailablemethodsinanalyzingstructuralprogressivecollapsecouldbeclassifiedintotwomajorcategories，namelythedirectsimulationmethod，inwhichtheblastloadingeffectsonstructuraldamageandbuildingcollapsearedirectlysimulated，anduncoupledalternativeloadpathmethodwithanalysisofthestructurebysimulatingvariouslevelsofdamagebytheremovalofkeyload—carryingmembers．Inthepresentpaper，theavailableprogressivecollapseanalysismethodsintheliteraturearereviewedaccordingtotheircategories．Bothadvantagesanddisadvantagesofeachmethodarelisted．Theirsuitability，applicabilityandreliabilityarealsodiscussed．Ourrecentlyproposednewmethodforprogressivecollapseanalysisofreinforcedconcreteframesunderblast1oadsisalsointroduced．1.Progressivecollapseanalysismethodsforbuildingstructures.

Inthissection，thecurrentmethodsforanalyzingstructuralprogressivecollapseavailableintheliteraturearepresentedintwomajorcategories，namelythedirectsimulationmethodandthealternativeloadpathmethod．文1.1Di高rects燦imulat防ionme漆t(yī)hod原

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