组合隔震系统基于负刚度装置的隔震效果研究  

Study on Seismic Isolation Effect of Composite Isolation System Based on Negative Stiffness Device

作　　者：杨巧荣[1] 任天娇 何文福[1] 于维欣 YANG Qiaorong;REN Tianjiao;HE Wenfu;YU Weixin(Department of Civil Engineering,Shanghai University,Shanghai 200072,China)

机构地区：[1]上海大学土木工程系,上海200072

出　　处：《结构工程师》2018年第4期73-79,共7页Structural Engineers

基　　金：国家自然科学基金项目(51478257;51308331);上海市自然科学基金(15ZR1416200)

摘　　要：超设计特大地震下隔震结构的隔震层变形控制得到了广泛关注。提出了一种附带阻尼水平向负刚度装置以此来控制强震下隔震层变形;建立该装置的力学模型,并对其性能影响参数进行理论分析;同时结合铅芯橡胶支座进行协同工作,形成负刚度组合隔震系统;最后建立多自由度隔震模型进行时程分析,对比负刚度组合隔震系统和常规隔震系统的隔震效果。研究表明,负刚度组合隔震系统在特大地震中不仅能有效控制隔震层的变形,且能降低隔震层及上部结构的加速度响应,避免隔震结构在特大地震作用下隔震层变形过大而引起的碰撞问题。Deformation control of the isolation layer in an isolation structure under the action of strong earthquake is widely concerned.In this paper,a kind of horizontal negative stiffness devices with damping were presented,in order to control the deformation of the seismic isolation layer.A mechanical model of the device was established,and its performance parameters were analyzed theoretically;at the same time,combined with lead rubber bearing,the negative stiffness isolation system was formed.Finally,a time history analysis of the multi-degree of freedom model was established.The seismic isolation effect of the negative stiffness isolation system and the common isolation bearings are compared.Research shows that the negative stiffness combined isolation system can effectively control the deformation of the isolation layer,and can reduce the acceleration response of the isolation layer and the upper part of the structure,to avoid collision caused by the excessive deformation of the isolation layer under action of strong earthquakes.

关 键 词：负刚度 隔震系统 强震 隔震效果 

分 类 号：TU352.12[建筑科学—结构工程]