大型滑移基础隔震储罐地震反应影响因素研究  

Research on influence factors of seismic response of large scale sliding base-isolated liquid storage tank

作　　者：李扬[1] 李自力[1] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266555

出　　处：《世界地震工程》2012年第4期69-74,共6页World Earthquake Engineering

基　　金：中央高校基本科研业务费专项资金资助(11CX04046A)

摘　　要：采用Bouc-Wen微分连续性模型模拟滑移支座的力学性能,对大型滑移基础隔震储罐非线性地震反应进行了仿真分析,得到了不同类型场地上大型滑移隔震储罐的地震响应特点,总结出了支座摩擦系数、复位刚度以及地震强度等因素对地震反应的影响规律。研究结果表明:大型滑移隔震储罐不适合建立在I类场地上,而在II类场地上减震效果最好。在IV类场地上隔震储罐出现晃动波高放大现象,并且需要增大支座摩擦系数和设置复位装置来控制过大位移反应。增大滑移支座复位刚度可以显著降低支座的残留位移。大型滑移隔震储罐在高地震强度地区的减震效果更好。The BoucWen model was adopted to simulate the nonlinear hysteretic characteristics of forcedisplace ment relationship for sliding bearing. The nonlinear equations of motion of large scale sliding baseisolated tank was solved by the Newmark＇ s stepbystep method and Rungekutta method. The seismic response characteristics of large scale sliding basedisolated storage tank at different sites were investigated. The influence of friction coeffi cient, restoring stiffness and earthquake intensity on the response of baseisolated tank was analyzed. The results indicate that large scale sliding baseisolated storage tank is unsuitable to be built at Site I and it has great isolation effect at Site II. The amplitude of sloshing height of liguid in the tank can increase remarkably at Site IV, moreover larger bearing displacement should be reduced by increasing friction coefficient and restoring stiffness of sliding bearing. The increase of restoring stiffness of sliding bearing can suppress sliding resident displacement effectively. The stronger the intensity of ground motion is, the better isolation effect the large scale sliding baseisolated tank has.

关 键 词：大型储罐 滑移基础隔震 地震反应 Bouc—Wen模型 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]