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ID:33963030
大小:7.10 MB
页数:68页
时间:2019-03-02
《中承式钢管混凝土拱桥稳定性能-研究》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、STUDYOFTHESTABILITY0FHALF.THROUGHCFSTARCHBIUDGEABSTRACTMorethantenyears,concrete—filledsteeltubulararchbridgehavedevelopedrapidly,butcomparedwiththeengineeringpractice,thetheoreticalresearchoftheCFSTarchbridgeisrelativelybackward.Alongwiththeincreaseofthespanandth
2、edecreaseofthewidth—spanratio,thestabilityofCFSTarchbridgeisincreasinglyimpoIrtant.Therefore,researchonithasimpoIrtanttheoreticalsignificanceandengineeringvalue.Stabilityproblemsareusuallydividedintotwokinds:thefirstoneisbranchpointinstabilitywhichcomesdowntotheei
3、genvalueproblem,thesecondoneisextremepointinstabilityconsideringnonlinearity.Generally,thestabilityofengineeringproblemsbelongtoextremepointinstability.Firstly,thepaperintroducedthetheoriesofthelinearandnonlinearstabilityanalysisanditssolution.Onthebasis,usingtheF
4、EAsoftwareANSYS,thepaperanalyzesthelinearelasticity,geometricnonlinearityanddoublenonlinearityofaCFSTarchbridgewithaspanfor204mduringtheconstructionphase.Theanalysisresultsshowthat:theresultof.II—thelinearelasticanalysisisnotsafefordesignandconstruction.Thestabili
5、tyanalysisinconstructionstageofaCFSTarchbridgemustconsiderdoublenonlineareffect.Finally,thepaperdiscussesinfluencescausedbysettingofwindcable,pouringsequencesofcoreconcrete,thenumberandlayoutofcrossbracesandinitialgeometricimperfection,andputforwardreasonableandfe
6、asibleadvice.ThiscalculatedresultsandconclusionshavesomereferencevaluefordesignandconstructionofCFSTarchbridges.KEYWORDS:coefficientofstability;linearelasticanalysis;nonlinearityanalysis;windcable;pouringsequences;initialgeometricimperfection目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯
7、⋯⋯..工ABSTRACT⋯⋯⋯⋯⋯⋯⋯...⋯⋯⋯⋯...⋯⋯⋯⋯⋯⋯.工工第1章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯。l1.1钢管混凝土结构⋯⋯⋯⋯⋯⋯⋯⋯.⋯⋯⋯⋯⋯⋯11.1.1钢管混凝土的概念及工作原理⋯⋯⋯⋯⋯⋯⋯⋯⋯11.1.2钢管混凝土结构的特点⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21.1.3钢管混凝土结构在拱桥上的应用与发展⋯⋯⋯⋯⋯⋯.31.2拱桥稳定理论的国内外研究现状⋯⋯⋯⋯⋯.⋯⋯.⋯⋯61.3本文研究的主要内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.⋯⋯..7第2章钢管混凝土拱桥稳定理论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯.92.1稳
8、定的概念及其分类⋯⋯⋯.⋯⋯⋯⋯⋯.⋯⋯.⋯⋯92.1.1第一类稳定问题⋯⋯⋯..⋯⋯⋯.⋯⋯.⋯⋯⋯..92.1.2第二类稳定问题⋯⋯⋯⋯⋯⋯⋯....⋯.⋯.⋯..102.2两类稳定系数⋯⋯............⋯......⋯⋯..⋯......122.2.1第一类稳定系数⋯⋯⋯⋯⋯.⋯⋯..⋯
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