摘要
目前基础隔震建筑中应用的叠层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，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明显减小，而由两个不同截面橡胶支座组成的组合橡胶支座在不同强度地震时均能发挥较好设计的隔震效果。本文对组合橡胶支座建立了分析模型，推导了水平刚度系数的实用计算公式，并对典型参数的影响进行了分析。文中指出组合橡胶支座模型也可用于橡胶支座与柱串联系统水平刚度的精确分析。
The normally steel plate laminated rubber bearing,whose lateral stiffness is designed inaccordance with strong earthquake excitation, is of constant cross section. If the-constant crosssection rubber bearings are installed in a base isolated building and subjected to minor or moderateearthquake, the effectiveness of the isolation system will apparently decrease compared with thecase of major earthquake due to the nonlinearity of lateral stiffness characteristics. If usingcombined bearing consisting of an up small one and down larger one, the effectiveness of theisolation system can be improved. The calculation model and formula of lateral stiffness of thecombined rubber bearing is established and deduced. Besides this paper also analyzed the influences of the typical parameters for the combined rubber bearing. It is pointed out that thesame model with the combined rubber bearing can also be used to analyze the lateral stiffnesscharacteristics of the serial system of rubber bearing with colunm.
出处
《地震工程与工程振动》
CSCD
北大核心
1999年第4期67-75,共9页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金资助重大项目!59895410
关键词
组合橡胶支座
分析模型
水平刚度系数
橡胶支座
combined rubber bearing, calculation model, lateral stiffness coefficient
