超静定曲线梁面内位移精确解

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1、y1031"ZG3学位论文超静定曲线梁面内位移精确解刘峰指导教师赵颖华教授／博导申请学位级别工学硕士专业名称道路与铁道工程学位授予单位大连海事大学英文摘要ExactSolutionforIn-planeDisplacementofRedundantCurvedBearnAbstractCurvedbeamsplayallimportantroleinmodemtrafficsystem，withwonderfulstreamlineshapeandconvenientwayofcommunication．Yettheinnate“Bending-Torsion”effectbringsab

2、igamountofobstaclesintheprocessofdesigning,constructing,andmaintainingofcurvedbeams．Asthestudythroughouttheworldgoeswideranddeeper,manyproblemshavebeenoptimizedandsolved，especiallytheverticalloadsofthedeadweiglltofthebridgeperseandcars．Nevertheless，thecurvedbeamsin-planeproblemshavenotbeenstudiedw

3、idely．MuchlessstudiescouldbefoundinrelatedCriterionandStandards．Therefore，theaccidentsindesignandconstructionhaverisenfromtimetotime．Basedonthecourseabove，thispaperisaimedatfulfillingtothelossoftherelatedthcories．Thispaperemphaticallystudiesthattheeffectofcurvedbeamsstressedbythecentripetalforceof

4、vehiclesrunningalongthebridgeinplane．Themaincontentincludes：1．AnalyticalSolutionFirstofall，simplifytherealbridgesintostructuresappropriateforcalculation．Thenusingtheprinciplesofvirtualenergy，induceanddeductrightanalyticalsolutionofdisplacementsofrandompositiononcurvedbeamswithdifferentboundarycond

5、itions，includingsingle·span(1redundant，2redundantand3redundantB．O，two·spansamecurvaturecontinuouscurvedbeams，andintroducethesimplewaytocalculatethedisplacementofmulti—spansamecurvaturecontinuouscurvedbeams．2．TheoreticalTestsTakethelimitofthecurvatureradiustomaximum。andthenthedisplacementsolutionof

6、curvedbeamscouldbccomparedwiththedisplacementsolutionofstraightbeamsunderequalcircumstances．Furthermore，thispaperillustratesthemodelofreal茎茎塑曼一bridgesusingFEMsoftwareAnsysforcomparison．Andtheanalyticalsolutionsarcre-examinedandprovedaccurate．3．ComparedAnalysisInordertoanalyzetheeffecttothecurvedbe

7、amsdisplacementbroughtbydifferentspans，centralangles，boundaryconditionsandloadposition,thispapergetsomeimportantconclusionsthroughclassifieddiscussion，forinstance，thecurvedbeamdisplacementisgettingbiggerwithlonge