螺栓连接的有限元分析

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1、FiniteElementAnalysisofStructuralSteelworkBeamtoColumnBoltedConnectionsJimButterworthConstructionalResearchUnit,SchoolofScience&Technology,UniversityofTeesside,UK.AbstractAcombinationofsimplefabricationtechniquesandspeedysiteerectionhavemadeboltedendplatesoneof

2、themostpopularmethodsofconnectingmembersinstructuralsteelworkframes.Althoughsimpleintheiruseboltedendplatesareextremelycomplexintheiranalysisandbehaviour.In1995theSteelConstructionInstitute(SCI)andtheBritishConstructionalSteelworkAssociation(BCSA)jointlypublish

3、edadesignguideformomentresistingconnections[1].TheGreenBookdesignmethodoffersincreasedconnectioncapacityusingacombinationoftheoreticaloverstressinthebeamcompressionzoneandplasticboltforcedistribution.ThispaperreportsonaPhDresearchprogramattheUniversityofTeessid

4、ewhichusesacombinationoffullscaletestingandmateriallynon-linearthreedimensionalfiniteelementanalyses(FEA)inordertoinvestigateextendedendplatebeam-to-columnconnections.TheFEAanalyses,incorporatingMYSTROandLUSASsoftware[2],useenhancedstrainsolidandcontactgapeleme

5、ntstomodeltheconnectionbehaviour.IntroductionAnextendedendplateconnectionconsistsofaplateweldedinthefabricationshoptotheendofthesteelbeamasshowninFigure1.Theendplateispre-drilledandthenboltedatsitethroughcorrespondingholesinthecolumnflange.Theplateextendsabovet

6、hetensionflangeinordertoincreasetheleverarmoftheboltgroupandsubsequentlytheloadcarryingcapacity.Theconnectionisusuallyloadedbyacombinationofverticalshearforce,axial1CS502-Issue1forceinthebeammemberandamomentasshowninthediagramofanelevationonabeam-to-columnjoint

7、inFigure2.Figure1-ExtendedEndPlateConnectionFigure2-ConnectionLoadingAccurateanalysisoftheconnectionisdifficultduetothenumberofconnectioncomponentsandtheirinheritnon-linearbehaviour.Thebolts,welds,beamandcolumnsections,connectiongeometryandtheendplateitselfcana

8、llhaveasignificanteffectonconnectionperformance.Anyoneofthesecancauseconnectionfailureandsomeinteract.Themostaccuratemethodofanalysisisofcoursetofabricatefullscaleconnection