预应力钢-混凝土组合梁力学性能研究

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1、分类号：U44，U45谖专太津硕士学位论文预应力钢一混凝土组合梁力学性能研究导师姓名职称申请学位级别论文提交日期学位授予单位颜全哲郝宪武教授答辩委员会主席学位论文评阅人胡兆同教授黄安录副教授马毓泉高工AbstractRecently,simplysupportedprestressedsteel-concretecompositebeamshavebeenwidelyusedinfreewayandurbanbridgeconstruction，dueingtothesteel’Stensilestrengthandtheconcrete’Scom

2、pressivestrengtharebeenfullyexerted，havingtheadvantageoflegerityandartisticofframework，biggerspan，convenienceandfasterinconstruction，andlittleinfluenceontra伍C．However,domesticandintemationaltheoreticalresearchesarenotenoughonaspectofprestressedsteel-concretecompositestructurea

3、ndtherearenotrespectiveprovisionsintheChinesedesignspecificationstillnow,SOtheseaspectshaveagreatinfluenceontheapplicationofthisreasonablestructuresystem．Basedoncomprehensivecollectionoftheexistingresearchdocumentshomeandabroad，thispaperexpoundstheworkingprincipleofprestressed

4、steel·concretecompositebeamsduringconstructionandoperation，discussestheinfluencingfactorsofmechanicalpropertiesofprestressedsteel-concretecompositebeams，describesseveraldesignmethodsofprestressedsteel-concretecompositebeamsindetail，summarizesthepracticalcalculatingformulaofpre

5、stressedsteel-concretecompositebeamsinvariousfunctionalstates，thispapercailprovideasignificativereferenceforthedesignandconstructionofthesamekindofbridge．Forthesakeofanalyzingthemechanicalpropertiesofprestressedsteel—concretecompositebeams，thepapercombinestheloadtestresearchof

6、XingguanglinkingrouteoverpassinInnerMongolia，testingthedataofstressanddeformationunderdesignloads；uses3DFiniteElementMethod(FEM)tocarrythroughnumericalsimulationtoloadtest，theresultsofthetheoreticalanalysisareagreedwell、析t11theexperimentaldata．Throughtheloadtestandfiniteelemen

7、tnumericalsimulationanalysis，thepaperprovidesbasesformorestudiesofprestressedsteel·concretecompositebeams，providestheoreticbasisandtechnicalguideforoverallextensionandapplicationofprestressedsteel—concretecompositebeams，andthisdissertationhasthecertaintheoreticalmeaningandprac

8、ticalvalue．Keywords：externalprestressingforce，steel—concretec