滑移摩擦型隔震结构考虑竖向地震作用影响的分析

英文篇名：Research on the Effects of Vertical Vibration on Horizontal Response of Structure with Frictional Sliding Isolator
中文刊名：工程抗震与加固改造
英文刊名：Earthquake Resistant Engineering and Retrofitting
作者：孙黄胜 ; 施卫星
英文作者：Sun Huang-sheng~1 ; Shi Wei-xing~2(1.College of Civil Engineering and Architecture ; Shandong University of Science and Technology ; Qingdao 266510 China ; 2.Research Institute of Structural Engineering and Disaster Reduction ; Tongji University ; Shanghai 200092 ; China)
中文关键词：摩擦滑移型支座 ; 隔震 ; 双向地震作用 ; 时程分析
英文关键词：frictional sliding isolator ; seismic isolation ; bi-directional earthquakes ; time history analysis
出版日期：2007-08-28
机构：山东科技大学土木建筑学院,同济大学结构工程与防灾研究所山东青岛266510,上海200092
年：2007
期：04
出版单位：工程抗震与加固改造

摘要

摩擦滑移型隔震支座具有较好的减震效果和经济性能,越来越多地应用于结构隔震。这种支座屈服力取决于滑动摩擦力,与摩擦系数和支座竖向压力有关。地震动是多维的,本文考虑双向地震动,分析了采用摩擦滑移型支座隔震的质量块、基础隔震结构和顶层隔震结构,在不同摩擦系数和地震烈度情况下竖向地震作用对结构水平地震反应的影响。计算表明,在大摩擦系数、高烈度情况下,竖向地震作用对基础隔震和设备隔震有一定影响,建议考虑竖向地震作用的影响;而在小摩擦系数时则可忽略。并且,适当的屈服后刚度可以减小竖向地震作用的影响。
Frictional sliding isolator is widely employed in structural seismic isolation with merits of excellent isolation effectiveness and economy.The yielding force of frictional isolator is dependent on the friction coefficient and pressure applied on the bearing.In reality,earthquake motion is multidimensional.The effects of vertical vibration on lateral responses of isolated block,base isolated structure and top layer isolated structure under various earthquake intensities and friction coefficients are analyzed.The analysis shows that the effects on horizontal responses of base isolated structures and equipments should be considered under strong intensity earthquake and large friction coefficient and may be neglected otherwise.Furthermore,it shows that proper stiffness after sliding could reduce the effects.

引文

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