大跨径斜拉桥非线性活载效应-研究

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1、AbstractWiththedevelopmentofcomputertechnologyaswellasthebridgecomputationtheory,itisnecessarytotakeathoroughlyresearchonspacecomputationofbridge.Thetransversedistributiontheoryisconsideredtotakeathree-dimensionmodelintoplananalysis.Theadvantageofthismethodliesinexplic

2、itconceptionandsimplecalculationwhileitcausesconsiderableerrorsinanslysingcomplicatedstructure.Thispaperstudiedtheinfluencesurfaceoflong-spancable-stayedbridgespaceloadingeffect.Themainworksinvolvedinthisresearchareasfollows:Firstly,thedomesticandforeigndevelopmenthist

3、oryandapplicationstatusofcable-stayedbridgeareintroduced,systematicallydiscussednolinearcharacterofcable-stayedbridge.TheinfluencesurfacewasbuiltbasedonautomotivemethodofLinearelasticstructure.TheBenchmarknodedisplacementmodeofcommonlyusedelementarecomparedaccordingtof

4、initeelementstressinfluencefunctiontheorem.DetailedelaboratedonChina'sbridgecodeofmovingloadcalculationrequirements.Secondly,athree-spantwotowerscable-stayedbridgemodelwasestablishedinLargegeneralfiniteelementanalysissoftwareofANSYS.Thegirderwassimulatedbyshellelement6

5、3andBeamelement188.AllresultdatawasimportedinsoftwareMatlabwhichmappedtheinfluencesurface.Thispapercomparedtheeffectofnolinearinfluencesurfaceandnolinearinfluencelineaswellasthelinearinfluencesurface.Alsotheparametriccontrastbetweendifferentinfluencevaluesunderdifferen

6、tunitforcesisdone.Finally,basedoninitialequilibriumstate,theliveloadeffectonlinearandnolinearinfluencesufaceareanalyzed.Theelementgridisrefined.Thedifferenceofkeysectioninternalforceresponsesundedifferenttheoryiscompared.Keywords:cable-stayedbridge,influencesurface,liv

7、eload,definitionmethod,geometricalnon-linearity.II目录第一章绪论..............................................................................................................................11.1斜拉桥发展历史概述.........................................................................

8、........................11.2斜拉桥活载内力计算方法的研究现状......................................................................21.