论文部分内容阅读
目前基础隔震建筑和桥梁中应用的叠层钢板橡胶支座都是等截面的，其水平刚度是以遭遇强烈地震为依据设计的，由于材料的非线性影响当遭遇中小地震时水平刚度将偏大，致使上部结构的减震效果比遭遇设计地震时有所减小，而由两个不同截面橡胶支座组成的组合橡胶支座有助于改善在中小地震时的隔震效果。组合橡胶支座由刚性连接板将上下两个橡胶支座联成一体，本文对组合橡胶支座建立了分析模型，推导了临界力方程和水平刚度系数的实用计算公式，对典型参数的影响进行了分析，同时对考虑与不考虑刚性连接板影响的结果进行了对比，结果表明当连接钢板的厚度与单个橡胶支座的高度之比小于０．２时，刚性连接板对组合橡胶支座水平刚度的影响一般是可以忽略不计的。
At present, the laminated steel plate rubber bearings used in base-isolated buildings and bridges are all of equal cross-section, and their horizontal stiffness is designed on the basis of strong earthquakes. Due to the nonlinear effect of materials, the horizontal stiffness of medium- The damping effect of the superstructure is less than that of the design earthquake. The rubber bearing composed of two rubber bearings with different cross sections can help to improve the isolation effect during small and medium earthquakes. The composite rubber bearing is composed of rigid connecting plates which are composed of upper and lower rubber bearings. In this paper, an analytical model of the composite rubber bearing is established, and a practical calculation formula of the critical force equation and the horizontal stiffness coefficient is deduced. The influence on the typical parameters The results show that when the ratio of the thickness of the connecting steel plate to the height of the single rubber bearing is less than 0.2, the rigidity of the connecting plate to the combined rubber bearing level The effect of stiffness is generally negligible.