基础隔震建筑简化软碰撞保护与变刚度保护的对比分析  

Contrastive Analysis of Simplified Soft-collision and Stiffness Variable Protection for Base Isolated Buildings

作　　者：杨林[1] 周锡元[1] 苏幼坡[2] 韩淼[3] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100022 [2]河北理工大学地震工程研究中心,河北唐山063009 [3]北京建工学院,北京100044

出　　处：《工程抗震与加固改造》2005年第5期37-44,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金委员会资助课题(50178007);北京市市属市管高校北京市重点实验室开放研究课题资助项目(00434)

摘　　要：基础隔震建筑通过设置隔震支座来保护上部结构不受损坏,但在长周期或强烈地面运动作用下会使隔震支座变形过大而导致隔震支座失稳破坏。在这种情况下,需增设保护装置作为第二道防线,以减小隔震层的变形,使之限制在允许的范围内,同时上部结构层间剪力不明显增大。本文主要对比分析了两种保护措施:①简化后的软碰撞保护;②变刚度保护。通过对其原理、力学模型以及工程实例的研究,选取了恰当的参数并进行了地震反应分析。In base isolated building, the rubber beatings, being as protectors of the superstructure, should also be protected from failure. The failure of rubber bearings may result in serious damage of superstructure when met with strong earthquake that might result in large horizontal displacement of rubber bearings, thus it is necessary to set up protection device as the second line of defence to reduce the deformation of isolated layer and the story shear forces of the super-structure are only slightly increased. In this paper two failure-prevention approaches of rubber bearings are contrastive analyzed. One way is to arrange simplified soft-collision protection, and the other is to arrange stiffness variable protection. Through the researche of their principle, mechanical model and parameters of engineering example, the analysis results of the effectiveness of these approach measures for protecting rubber bearings are described.

关 键 词：基础隔震 叠层橡胶支座 缓冲限位器 软碰撞 变刚度保护 

分 类 号：TU352.12[建筑科学—结构工程]