斜拉橋非線性分析與施工控制.pdf

1、武漢理工大學(xué)碩士學(xué)位論文斜拉橋非線性分析與施工控制姓名：王華林申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：楊平2002.3.1斜拉橋非線性分析與施工控制————_______———______——●_____—————_____————_____—_—●_______^●————————————————————————ABSTRACTInthisthesisthenonlinearstaticanalysisofcablestayedbr

2、idgesundertheeffectoftheirowndeadweightandasetofinitialcabletensionsisformulatedAllsourcesofgeometricnonlinearity，suchascablesag，axialforce—bendingmomentinteractioninthebridgedeckandtowers，andchangeofthebridgegeometrydue

3、tolargedisplacement，areconsideredintheanalysisThethesispresentsamethodformodelingcablestayedbridgefornonlinearfiniteelementanalysisThatiStOadoptspacetruss。beammodeItosimulatethewholestructuresystemThesystemequationofcabl

4、e—stayedbridgesincludingallofthenonlinearitiesisfirstsetupandthensolvedusingtheNewton—Raphsonmethodonincrement—iterationwiseThisthesispresentsamoreeffectiveconver—gencecriterionanddichotomytosolvethisproblemTheexamplesin

5、thethesishaveshowntheuseofthenewconvergencecriterionanddicho—tomyAndtheresultsoftheexamplesareveryreasonableontheotherhandtheinvestigationaboutthereasonablecabletensionsandthecontrolforceintheconstructionispresentedinthe

6、thesisAnoptimizationmethodfordeterminingtheinitialcabletensionsduetodeadIoadiSpresentedinthethesisThismethodiSbasedonthemInimumofbendingenergyunderdeadloadAnditiSprobablyabettermethodtodeterminethereasonablecabletensions

7、intheoptimizationmethodsTheidealizednonlinearbackrunninganalysisISalsodiscussedinordertocalculatethecablestayedbridges’constructionBythisanalysismethod，theoptimizationresultsofthestructurecanbefinallyachievedinconstructi

8、onInordertokeeptheintegrationoftheconstruc—tioncontrol，theprinciples，processesandmethodsarealsopresentedFromthisstudy，thefollowingconclusionsmaybemade：Itisaccu—ateandreasonabletOusearathersimplerspacetrusselementtomodeIt