大跨徑三塔結(jié)合梁斜拉橋收縮徐變效應(yīng)研究.pdf

1、武漢理工大學(xué)碩士學(xué)位論文大跨徑三塔結(jié)合梁斜拉橋收縮徐變效應(yīng)研究姓名：程濤申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：橋梁與隧道工程指導(dǎo)教師：劉沐宇20100501AbstractRencentyears，steel—concretecompositegirderWaSwidelyusedowingtoitslightweight，hi曲intensityandhi班rigidityErqiYangtzeRiverBridgeiscompositegirde

2、rcablestayedbridgewiththreetowerswiththelongestspanintheworld，whichisconnectedwimsteelgirderandconcreteslabSteelconcretecompositeismadeoftwodifferentmaterialsItwillleadinteractionforcebetweensteelandconcrete，intemalforce

3、redistributionandlotsofadditionaldeformationbecauseofconcreteshrinkageandcreepAsthechangeofshrinkageandcreepforconcreteiswiththetime，leadhugedifferencesintheeffectscausedbyconcreteatdifferentagesInordertopreventproducing

4、thedeflection、variationofstressesandtheprestresslosscausedbytheshrinkageandcreepofconcrete，manycompositebridgesplacedtheprecastconcretepanelsforsometimeandthensetupItcouldprovidereferencefordesignandconstructionofsamekin

5、dofbridgethroughstudyingtheperformanceofcompositegirdercablestayedbridgeundertheconcreteshrinkageandcreepatdifferentagesTakingErqiYangtzeRiverBridge弱allexampleestablishdimensionalfiniteelementmodewiththebridgeprofessiona

6、lsoftwareMIDAS／CIVIL；studytheperformanceofcompositegirdercablestayedbridgeunderconcreteshrinkageandcreep；basedontheageadjustedeffectivemodulusmethod，analysethedeflectionandstresschangesofcompositegirdercable—stayedbridge

7、withthreetowerundertheinfluenceofshrinkageandcreepatdifferentagesSpecificallyspeakingthispaperhasdealtwiththefollowingrespects：1、TakingErqiYangtzeRiverBridgeasanexample，establishfiniteelementmodewiththebridgeprofessional

8、softwareMIDASItprovedthatthebridgedesignissuitablethedeflectionofmaingirder、compressiveStresSofconcretemembersandlassobothmeetregulatoryrequirements；2、Analysetheperformanceofcompositegirdercablestayedbridgewiththreetower

9、undertheinfluenceofshrinkageandcreep，theanalyticalresultsindicatethat，concreteshrinkageandcreepcallnotbeignoredforthedeflectionofcompositegirdercable—stayedbridgewiththreetowers，thedeflectionofmaingirdersincreased76cm；th