中承式钢管混凝土拱桥稳定性能-研究

《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⋯⋯⋯⋯⋯．⋯⋯．．⋯