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基于响应面的刚构-连续组合梁桥有限元模型静动力修正 Title:StaticandDynamicCorrectionofFiniteElementModelofRigid-ContinuousCompositeBeamBridgeBasedonResponseSurface Abstract: Thefiniteelementmethod(FEM)hasbeenwidelyusedtoanalyzeanddesignbridgesduetoitsadvantagesinsolvingcomplexstructuralproblems.However,theaccuracyoftheFEMmodelheavilydependsonthematerialproperties,boundaryconditions,andelementtypesspecifiedintheanalysis.Thisstudyinvestigatesthestaticanddynamiccorrectionofthefiniteelementmodelofarigid-continuouscompositebeambridgebasedonresponsesurfacemethodology.Byusingthedesignofexperimentmethod,thesignificantinfluencingfactorsaredetermined,andtheresponsesurfaceisestablishedforbothstaticanddynamicanalyses.Thecorrectioncoefficientsareobtainedbysolvingtheresponsesurfaceequations,andthenthecorrectedFEMmodelisevaluated. TheresultsshowthattheproposedmethodcaneffectivelyimprovetheaccuracyoftheFEMmodel,bothinstaticanddynamicanalyses.Themaximumdeflectionerrorwasreducedby38.1%afterstaticcorrection,whilethemaximumerrorofnaturalfrequencywasdecreasedby25.7%afterdynamiccorrection.ThecorrectedFEMmodelcancapturetheactualstructuralbehaviormoreaccurately,providingareliablebasisforbridgedesignandassessment. Keywords:Finiteelementmodel,responsesurface,rigid-continuouscompositebeambridge,staticcorrection,dynamiccorrection Introduction: Bridgesarecriticalcomponentsofthetransportationinfrastructure,andtheirsafetyandreliabilityareofgreatconcerntothepublic.Toensuretheperformanceofbridges,accurateanalysisandevaluationarenecessaryinthedesignandassessmentprocess.Thefiniteelementmethod(FEM)hasbeenwidelyusedinbridgeengineeringduetoitsabilitytosolvecomplexstructuralproblems.However,theaccuracyoftheFEMmodeldependsonthemodelingassumptions,materialproperties,boundaryconditions,andelementtypesspecifiedintheanalysis.Therefore,itiscrucialtovalidatetheFEMmodelbycomparingtheanalysisresultswithexperimentaldataorotherreliableanalysismethods. Therigid-continuouscompositebeambridgehasbeenwidelyusedinbridgeengineeringduetoitsadvantag