簡支變連續(xù)雙支座組合箱梁結(jié)構(gòu)性能研究.pdf

1、東南大學(xué)碩士學(xué)位論文簡支變連續(xù)雙支座組合箱梁結(jié)構(gòu)性能研究姓名：高合嬌申請學(xué)位級別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：虞建成20090602AbstractAbstractTransformingfromsimple—supportedgirderintocontinuousgirderisacommonmethodincontinuousbridgeconstructionPrefabricatedbeamsaregenerallyer

2、ectedfirstthengirdersareconnectedaSawholeonthetopofthepiers，anditformsthecontinuousbeamsystemaSaresultSimple—continuousboxgirderbridgescanbedividedintothedoublesupportandthesinglesupportbridgesforthesupportquantityonthep

3、iersTheexistingstudiesonsimplecontinuousmultiboxgirderaremostlybasedonsinglesupportSinglesupportstructuresarewidelyadoptedfortheadvantagesofdefinitestressing，simplecalculationofstructuralanalysisandfeWconstraints，lessstr

4、essinginfluencefromextemalloadwhiledoublesupportstructurestransformingfromsimplesupportedintocontinuousareseldomadoptedandstudiedThethesisprimarilyinvestigatesthestressingbehaviorthedesignofconfigurationandtheconstructio

5、nrequirementsoftheskewbridgewhichissimple—continuous，bythecompositionofboxgirderanddoublesupported，expectingtoofferreferenceforEngineeringpracticeThethesisfirstestablishesplanebarmodelsofthesimplecontinuousmultiboxgirder

6、bridgeswithdoubleandsinglesupport，simulatesconstructionphasesofthebridge，andanalysesthestructurestressingatthephasesofconstructionandoperational，underactionofdeadloadandthecompositionofdeadandliveloadsrespectivelywhileth

7、eexternalfactorssuch私temperatureandsubsidenceofstructurebasearealsoconsidered，forcomprehendingthestressingbehaviorofdoublesupportstructureTheresultshowsthatdoublesupporthasthefunctionofcuttingtheapexofnegativemomentonthe

8、topofpiersandthedoublesupportstructurehasmorefavorableandunifornlstressingcomparedwiththesinglesupportstructureSpacemodelisbuiltthentocarryoutspatialcomputationofstructure，andthethesisanalysestheetlectonsupportreactionfr

9、omvariousstructureparameterssuchaSsupportstiffnessskewangleandSOon，takingthecommonorthogonalorobliquecrossingsimplecontinuousmulti—boxgirderbridgesforexample，whichareusualunidirectionaltwo1aneandcomposedoffourgirders。ino

10、rdertodeterminethatwhetherornotthesupportwilldisengagewhenthestructureiSdoublesupportedTheresultshowsthatdoublesupportstructurewillnotdisengageandsupportreactiontendstobeuniformwhensupportstiffnessdecreasesandnonuniformw

11、henskewangleincreasesIntheend，itputsforwardsomeemploymentadviceofdoublesupportsuchaSusingsinglecrossbeamonpiertop，increasingthesizeofcappingbeamofpierstoarrangementtworowsupports，adoptingsupperswithsmallerstifinessandcon

12、trollingtheinstallationprecisionofsupports，fromtheperspectivesofdesign，constructionandeconomics，basedonthecomparisonofstressingbehaviorofdoublesupportandsinglesupportstructuresKeywords：simple。continuous；singlesupport；dou