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1、第25卷第2期建筑科学与工程学报Vol.25No.22008年6月JournalofArchitectureandCivilEngineeringJune2008文章编号:1673-2049(2008)02-0096-05剪力钉刚度对曲线钢-混凝土箱形结合梁桥结构性能的影响112雷自学,晏兴威,高林(1.长安大学建筑工程学院,陕西西安710061;2.吉林省高等级公路建设局,吉林长春130021)摘要:采用有限元软件ANSYS对剪力钉推出试验进行了仿真分析,得出了与真实试验结果非常接近的荷载-滑移曲线,因而可用于实
2、桥分析;在SAP2000软件中用弹簧单元模拟剪力钉,其刚度采用仿真推出试验所得值,对一实桥结构进行三维空间建模分析,得出在一些荷载作用下的结构响应,以比较考虑混凝土与钢箱界面滑移与否对曲线钢-混凝土箱形结合梁桥部分结构性能的影响。结果表明:剪力钉刚度变化对于桥面板纵向应力影响较大,但对钢箱底板纵向应力、挠度及桥梁横向位移影响较小;曲线钢-混凝土结合梁桥剪力钉内力分布非常复杂,远非能用解析式或简化方法得出;必须采用有限元分析法或其他严密的方法对曲线钢-混凝土结合梁桥进行研究。关键词:钢-混凝土箱形结合梁桥;剪力钉;推
3、出试验;滑移;仿真分析中图分类号:TU318文献标志码:AEffectofStiffnessofShearStudsonStructuralBehaviorofCurvedStee-lconcreteCompositeBoxGirderBridges112LEIZ-ixue,YANXing-wei,GAOLin(1.SchoolofArchitecturalEngineering,ChangpanUniversity,Xipan710061,Shaanxi,China;2.JilinProvincialHighCl
4、assHighwayConstructionBureau,Changchun130021,Jilin,China)Abstract:Thesimulationanalysiswascarriedoutforshearstudpush-outtestbyusingANSYSsoftware.Theloadandslipcurvethatwasquiteclosetothatofrealtestswasobtained.Hence,itcouldbeuseddirectlyinrealbridgesanalysis.I
5、nSAP2000software,springelementswereadoptedtosimulatetheshearstudswithshearstiffnessobtainedinthesimulationanalysis,anda3-Dmodelforarealbridgestructurewasbuiltandanalyzed.Thestructuralresponsesundersomeloadswereobtainedtocomparetheeffectofslipbetweentheconcrete
6、deckandsteelboxonthestructuralbehaviorofthebridge.Theresultsindicatethatthestiffnessofshearstudshasrelativelystronginfluenceonthelongitudinalstressofconcretedeck,buthasslightinfluenceonthelongitudinalstressesofthebottomsofsteelboxgirders,defectionsandtransvers
7、edisplacementofbridges;thedistributionoftheinternalforcesofshearstudsofacurvedstee-lconcretecompositeboxgirderbridgeisverycomplicated,farfrombeingcalculatedbyanalyticalformulaeorsimplifiedmethods.Therefore,thefiniteelementanalysismethodorotherrigorousmethodsar
8、eneededfortheanalysisofcurvedstee-lconcretecompositeboxgirderbridges.Keywords:stee-lconcretecompositeboxgirderbridge;shearstud;push-outtest;slip;simula-tionanalysis收稿日期:2008-02-20基