雙層斜拉橋復合桁架節(jié)點受力性能研究.pdf

1、同濟大學土木工程學院碩士學位論文雙層斜拉橋復合桁架節(jié)點受力性能研究姓名：黃生富申請學位級別：碩士專業(yè)：橋梁與隧道工程指導教師：劉玉擎20080601ABSTRACTABSTRACTShanghaiMinpuBridgeisdoubledeckcable—stayedtrussbridgewithmainspanof708mUpperdeckisbuiltforeight—lanebidirectionalexpresswaywhilel

2、oweroneisforsix1anebidirectionallocalhighwayThemainspanisdecktrussstructurecomposedoforthotropicdeckandsteeltrussandsidespanisalsodeck—trusscompositestructurecomposedofconcretedeckandsteeltrussCompositetrussjointofsidesp

3、anisthecompositestructurecomposedofsteelwebmembers、steelreinforcedconcretechords、prestressedconcretecrossbeams，cable—girderanchoragezoneandprestressedanchoragezoneTheformofjointsconnectiondetailstructureisfresh、complexan

4、dwithoutanyreferenceathomeandabroadThispaperbulitupmodelsofthreelevels：thespatialintegratedmodel、barsystemandsegmentgirdermixed—infiniteelementmodelandjointsdetailstructuresub—modelLoadingconditionsandloadingboundarycond

5、itionsofjointsmodelsweresolvedeffectivelyandtheanalysisonmechanicalbehaviorofcompositejointswererealizedLowerchordsjoints、uppermiddlechordsjointsanduppersidechordsjointsofcompositetrusstypicaljointswereselectedtobuildjoi

6、ntsolidmodelconsideringthefunctionsofshearstudsAnalysisoffactorsinfluencingthemechanicalbehaviorofjointswerecarriedoutSomeachievementsofhighreferencevalueforbridgedesignwereobtainedCreepcalculationofconcretewithANSYSsoft

7、warewasdiscussedatlastTheinfluenceofcreepoffilledconcreteinthesteelwebmemberoflowerchordjointatthetopofpieronthejointplatestressandshearforceofshearstudswasanalysedKeyWords：double—deckcable—stayedbridge，compositetrussjoi