基于混凝土本构关系的钢管混凝土轴压性能仿真分析-simulation analysis of axial compression performance of concrete filled steel tube based on concrete constitutive relation.docx

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2018-06-05 发布于上海
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基于混凝土本构关系的钢管混凝土轴压性能仿真分析-simulation analysis of axial compression performance of concrete filled steel tube based on concrete constitutive relation.docx

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基于混凝土本构关系的钢管混凝土轴压性能仿真分析-simulation analysis of axial compression performance of concrete filled steel tube based on concrete constitutive relation

AbstractAsakindofcompositestructureform,ConcreteFilledSteelTube(CFST)cangivefullplaytothecharacteristicsofthesteelandconcretematerials,andtoacertainextent,tomakeupforthedefectofthematerial.BecauseoftheinteractionofSteelandconcrete,CFSThasexcellentbearinganddeformationperformance.Therefore,theapplicationandresearchaboutCFSTisveryactiveinrecentyears.Previousresearchshowsthat,thecon-stitutiverelationofcoreconcreteandconstrainingcoefficient(expressedasξ)hassig-nificanteffectstothemechanicalpropertiesofCFST.Therefore,thestudyofthecoreconcreteconstitutiverelationhasimportantpracticalsignificance.Thispaper,basedonthedifferentcoreconcreteconstitutiverelationship,aimstoes-tablishthefiniteelementmodel(FEM)ofthecircularCFSTunderaxialcompression.Themaincontentsweresummarizedindetailasfollows:Summarizethebasicphenomenonandtheresultsofthetestofshortcolumn,themechanismoftheconstrainteffectandtheexistingconstitutiverelationshipofthecoreconcreteofCFST.OnthebaseofLiu-Hanscoreconcreteconstitutiverelationship,apre-liminaryamendmentissuggested.ChoosetypicaltestresultsandestablishFEMofthecircularCFSTunderaxialcompression.Throughthecomparisonbetweentheexperimentalresultsandnumericalcalculationresults,analyzingthenumericalmodelisreasonableornot.Basedontheanalysisofpreviousresults,itcanbeprovedthatthepreliminaryamendmentofLiu-Hanscoreconcreteconstitutiverelationshipisreliableandthecor-rectedconstitutiverelationshipcanbeusedtoobtaintheLoad-deformationcurveofsimi-larcomponents.Choosingtypicalcodesathomeandabroadtodesignselectedcomponents.Ac-cordingtothecalculationresults,Accordingtothecalculationresults,thispaperputsfor-wardthedesignsuggestionsforreference.Keyword：ConcreteFilledSteelTube(CFST),Confinementeffect,ConstitutiveRelation,SimulationAnalysis,Bearingcapacity目录独创性声明..............................................................................................................1摘要...............................................................................................................