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  

Effect of Stiffness of Shear Studs on Structural Behavior of Curved Steel-concrete Composite Box Girder Bridges

作　　者：雷自学[1] 晏兴威[1] 高林[2] 

机构地区：[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

出　　处：《建筑科学与工程学报》2008年第2期96-100,共5页Journal of Architecture and Civil Engineering

基　　金：云南省交通科技项目(TST2002204A)

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。The simulation analysis was carried out for shear stud push-out test by using ANSYS software. The load and slip curve that was quite close to that of real tests was obtained. Hence, it could be used directly in real bridges analysis. In SAP2000 software, spring elements were adopted to simulate the shear studs with shear stiffness obtained in the simulation analysis, and a 3-D model for a real bridge structure was built and analyzed. The structural responses under some loads were obtained to compare the effect of slip between the concrete deck and steel box on the structural behavior of the bridge. The results indicate that the stiffness of shear studs has relatively strong influence on the longitudinal stress of concrete deck, but has slight influence on the longitudinal stresses of the bottoms of steel box girders, defections and transverse displacement of bridges; the distribution of the internal forces of shear studs of a curved steelconcrete composite box girder bridge is very complicated, far from being calculated by analytical formulae or simplified methods. Therefore, the finite element analysis method or other rigorous methods are needed for the analysis of curved steel-concrete composite box girder bridges.

关 键 词：钢-混凝土箱形结合梁桥 剪力钉 推出试验 滑移 仿真分析 

分 类 号：TU318[建筑科学—结构工程]