斜拉—懸吊組合體系橋梁的力學行為及施工過程分析.pdf

1、西南交通大學碩士學位論文斜拉懸吊組合體系橋梁的力學行為及施工過程分析姓名：邱景申請學位級別：碩士專業(yè)：橋梁與隧道工程指導教師：沈銳利20111216西南交通大學碩士研究生學位論文第1I頁AbstractThecablestayedsuspensionbridgeisabridgethatsuspensioncablesandstaycablesareusedtogether刪sbridgetypeischaracterizedbyrel

2、ativelynewstructure，greatoverallstiffnessandlong—spancapacityWiththepromotionofChina’Seconomicandtheurgentneedforthetrafficengineeringtocrosstheriversorseas，thecable—stayedsuspensionbridgehasbeenproposedforthedesignofsom

3、eextralongspanbridgesTherefore，itissignificantforengineeringtotakefurtherresearches0nmechanicalpropertiesofthisstructureTakingproposedpreliminarydesignofacablestayedsuspensionbridgewitllamainspanof1800mforengineeringback

4、ground，themechanicalproperties，theinfluenceofdesignparametersonstructuralstaticanddynamiccharacteristicsandtheclosuremethodsintheconstruction眥studiedFirstlythedevelopmenthistoryandstructuraltypesofthecablestayedsuspensio

5、nbridgesarebrieflyreviewedAndtheresearchesthathavebeendoneathomeandabroadaresummarizedSecondly’thesoftwareBNLASforspacenonlinearfiniteelementanalysisisusedtodeterminethereasonablecompletedstatusandstudythestructuralrespo

6、nseunderdifferentloadcasesnlemainmechaniccharacteristicscouldbeobtainedThirdlyinordertostudythestiffnessofthestructure，thethreespansuspensionbridgeandthesingle—spanbridgeareanalyzedforcomparisonFinallythereasonsforthefat

7、igueofthelongestsuspensioncablesandthevariationofthestiffnessattheoverlapareaarealsodiscussedBychangingtheoveralllayoutthecablestayedsuspensionbridgescheme、)~，ithdifferentparameterisanalyzedTheinfluenceofseveralparameter

8、s(therisespanratio，thesuspensiontospanratio，theauxiliarypiers，theconstraintconditionofthegirderthelayoutofthesuspensioncables，theheightofthegirderandtheelasticmodulusofsuspensioncables)onsUucturalstaticanddynamicproperti

9、esarediscussedBasedonthereasonablecompletedstatus，theconstructionmodelisestablishedbybackrunningmethodThekeytechnicalproblemsintheconstructionarepointedoutAndtheclosuremethodsCanbeadoptedarealsostudiedThcstudyindicatesth

10、atthecablestayed—suspensionhasthemeritsofreasonablestructure，greatoverallstiffnessandbetterwindresistantperformanceBecausethedistanceofthenoncablesareanearthepylonislonger’theverticalstiffnessofmaincablesisrelativesmallH