竖向荷载作用下多排抗剪连接件剪力分布的计算方法  

Calculation of Shear Distribution of Multi-row Shear Connectors under Vertical Loads

作　　者：吴文明[1] 唐亮[1] 刘高[1] 

机构地区：[1]中交公路规划设计院有限公司,北京100088

出　　处：《公路交通科技》2011年第2期77-81,共5页Journal of Highway and Transportation Research and Development

基　　金：交通运输部西部交通建设科技资助项目(200731849405)

摘　　要：针对抗剪连接件剪力分布的不均匀程度缺少理论分析的现状,利用弹性变形理论,推导了多排抗剪连接件在竖向荷载作用下相对滑移和剪力分布的理论计算公式,并与有限元计算结果进行了验证。结果表明,钢板端部固定可以改善连接件的受力状态,且钢、混凝土受力分布也较为均匀;多排抗剪连接件刚度和间距越大剪力分布越不均匀。得到了竖向荷载作用下多排抗剪连接件的工作机理为:钢板竖向位移和荷载随深度递减,抗剪连接件剪力自上而下逐步发挥作用。且理论计算与有限元分析结果一致,表明该公式具有较好的准确性和便利性。The distribution of shear along an interface between steel and concrete is generally non-uniform and none theoretic analysis for the non-uniform level.Using elastic deformation theory,the analytical formula of interface slip between steel and concrete and shear distribution of multi-row shear connectors under vertical loads were derived.The 3D numerical FE model was served to calibrate the analytical results.The result shows that（1） shear distribution of connectors can be improved by end fixation of steel,which keeps uniform distribution of shear in steel and concrete;（2） shear distribution is uneven along with shear stiffness and clearance increase.The working mechanism of the multi-row shear connectors under vertical loads is that steel plate vertical displacement and load reduce along depth and shear connectors perform function from top to bottom gradually.FE and theoretic analysis results are in good agreement and the analytical formula is correct and convenient.

关 键 词：桥梁工程 抗剪连接件 有限元 剪力分布 理论分析 

分 类 号：U448.58[建筑科学—桥梁与隧道工程]