南河特大橋施工結構安全分析.pdf

1、東南大學碩士學位論文南河特大橋施工結構安全分析姓名：王鵬申請學位級別：碩士專業(yè)：橋梁與隧道工程指導教師：丁漢山20040314^BSrRACl、StructureSafetyAnalysisduringtheConstructionalProcessoftheGreatNanheBridgeWangPengSupervisedbyPmfDingHanshanSoutheastUniversityABSTRACTThemainspanof

2、theGreatNanheBridgeisaCFSTtiedarchbridgeSystematicalstudyismadeontwoproblemshappenedduringtheconstructionofit，oneis‘‘pumpingconcreteintothemidstboxofarchribwithdumbbellshapedcrosssection”andtheotheris“stabilityofhighprov

3、isionalpiersforerectingarchrib”，botharerelatedtothestructuresafetyThepartiallystressanalysisofthesteelwebplate，duringpumpingconcreteforarchribwithdumbbellshapedcrosssection，takesabiggerstepforwardstointroducethesteelelas

4、toplasticbehaviorintostudyonthebasisofelasticallytheoreticaIanalysisSothattheeffectwhichthesteeIelasto—plasticbehaviorofmaterialwillhaveonthebearingcapacityoftheplateistakenintoaccountTheresultsshowedthatthepartiallystre

5、ssjustontheweldofthesteelwebplatewillexceedyieldpointandstayinginaplasticstatebecauseofgreatpressure，soitisnecessarytotaketherigidelastoplasticbehaviorofsteelintoaccounttoanalyzestressanddeflectionofthesteelwebplateTheme

6、thodsteinforcetheplateareanalyzedtoo，andafewpiecesofprincipleareputfoward，whichtellhowtodecidematerialoflinks，diameteroflinksandspacebetweentwolinksForthedoorshapedhighprovisionalpiersadoptedintheGreatNanheBridgeconstruc

7、tion，thebucklinganalysisbeginswiththestudyofasinglesteelpipeItgetoverthedifficultiesarosebyirregularityofthepiermembers，anditalsostudiedthemethodofsimplifyinggroundworkofpiersthedisposalofdiagonalbracesandthefunctionofli

8、nksbetweenprovisionalpiersetc1IhestudyshowsthattheFEMfitswellforthestudyofsuchirregularstructuresasprovisionalpiersanditalsoshowsthatthenonlinearfactorsselfgravity，initialimperfectionsetccannotbeneglectedItconfirmsthatth

9、eprovisionalpiersaresafetyandrigidenoughtomeettherequestinarchriberectingTheadvicesprovidedinthisdisserlationareusefulforthedesignandconstructionofsimilarstructureItalsoprovidesgoodexamplesforFEMnonlinearanalysis，andwill