复合材料连接技术进展_黄志超(7)

第4期黄宏，等：方中空夹层钢管混凝土压弯扭构件数值模拟29

NumericalSimulationofConcrete-filledDoubleSkinSteelTubeunderCompression-Bending-TorsionLoading

HuangHong，LiTing，ChenMengcheng

（CollegeofCivilEngineeringandArchitecture，EastofChinaJiaotongUniversity，Nanchang330013，China）

Abstract：Finiteelementmethodisadoptedtoanalyzemechanismoftheconcrete-filleddoubleskinsteeltube（CFDST）andconcrete-filledsteeltube（CFST）members.TheoutersteeltubeofCFDSTandCFSTmembersissquarehollowsection（SHS），andtheinnersteeltubeofCFDSTmemberiscircularhollowsection（CHS）.ThisstudyfindsthattheultimatebearingcapacityofCFDSTundercombinedcompression-bending-torsionloadisinaccordancewithCFST，buttheductilityoftheCFDSTisbetter.Theinteractionbetweensteelandcon-creteinthecorneristhelargestinthecrosssection.ThelongitudinalloadsbornbysteeltubesandconcreteofCFDSTandCFSTversuslongitudinalstrainrelationshipcurvesaresubstantiallythesame.ThetorquebornbysteeltubesofCFDSTismorethanthatofCFST，andthetorquebornebysandwichedconcreteofCFDSTislessthanthatbornebycoreconcreteofCFST.Theconcretebears26%～33%torqueofthememberduetothecon-straintofsteeltubesandpreventsthebucklingofsteeltubes.

Keywords：CFDST；CFST；compression-bending-torsion；finiteelement（上接第6页）

DevelopmentofCompositeConnectionTechniques

HuangZhichao1，ChenWeida1，ChengWenyu1，XueShuguang1，LaiJiamei2

（1.KeyLaboratoryforConveyanceandEquipmentoftheMinistryofEducation，EastChinaJiaotongUniversity，Nanchang330013，China；2.SchoolofMechanicalandElectricalEngineering，NanchangUniversity，Nanchang330031，China）

Abstract：Developmentsofcompositejoiningtechniquesareexploredinthispaper.Itmainlydiscussesprinci-plesaboutthecompositeconnectiontechniques，suchastraditionalmechanicaljoint，adhesivejoint，stitchedjoint，Z-pinedjoint，combinedjointandcoldrollingriveting.Meanwhile，relatedfactorswhichinfluencetheper-formancesofjointareintroducedandtheadvantages，binedjointistheexpansionofmechanicaljoint，withstitchedjointandZ-pinedjointoftenusedasauxiliaryconnection，adhesivejointbe-comingmaturegradually.Coldrollingrivetinghasnotbeenresearchedfully，soithasbroadapplicationpros-pectincompositejointprocess.Differentjointshavethecorrespondingconditionsandrequirements，thusthequalityofjointperformanceinvolvesmanycomplexfactors.

Keywords：compositeconnection；mechanicaljoint；adhesivejoint；stitchedjoint