圆形板式橡胶支座轴向刚度的研究  

Study on the Axial Stiffness of Circular Laminated Rubber Bearing

作　　者：陈波[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《中国铁道科学》2012年第5期29-32,共4页China Railway Science

基　　金：教育部长江学者和创新团队发展计划资助项目(IRT1139)

摘　　要：为解决广泛应用于铁路、公路桥梁以及建筑物的圆形板式橡胶支座轴向刚度计算问题,根据轴向压力作用下圆形板式橡胶支座的压缩变形特征,并考虑橡胶层和加劲钢板层层数和厚度的影响,假定一组满足边界条件的试探位移函数,然后利用变分原理和卡氏第二定律,导出圆形板式橡胶支座的轴向刚度计算公式。利用该公式计算圆形板式橡胶支座轴向刚度时,不受橡胶层和加劲钢板层层数和厚度的限制,并且可忽略加劲钢板轴向变形对支座轴向刚度的影响。通过比较,计算值与实测值的吻合程度较好。The circular laminated rubber bearing can be widely used in railways, highways, bridges, and buildings. Considering the influence of the layer number and thickness of rubber and stiffened steel plate layers, as well as the compression deformation characteristics of circular laminated rubber bearings under axial pressure, a group of trial displacement functions which satisfy the boundary conditions are assumed for solving the axial stiffness. By using the variation principle and the second Castingliano's theorem, the axial stiffness formula is derived. Using the formula and test methods, the calculated and measured values of axial stiffness are in good agreement. Meanwhile, the layer number and thickness of rubber and stiffened steel plate layers of the laminated rubber bearings are not be limited when using the formula, and the influence of the axial deformation of the stiffened steel plate on axial stiffness can be ignored in the calculation.

关 键 词：板式橡胶支座 轴向刚度 橡胶层 加劲钢板层 试探位移函数 应变能 变分原理 

分 类 号：U443.361[建筑科学—桥梁与隧道工程]