斜拉—懸吊組合體系橋梁的力學(xué)行為及施工過程分析.pdf

1、西南交通大學(xué)碩士學(xué)位論文斜拉懸吊組合體系橋梁的力學(xué)行為及施工過程分析姓名：邱景申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：沈銳利20111216西南交通大學(xué)碩士研究生學(xué)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