（北京建筑工程学院， 北京100044）

[摘要]  近断层脉冲型地震动的大幅值、长周期速度与位移脉冲会使基础隔震结构的隔震层产生过大变形，导致隔震支座侧向失稳，隔震结构体系破坏。提出隔震层组合限位器软限位保护方案。设计实验模型，输入近断层脉冲型地震动，应用软件SAP2000对36种软限位工况进行分析，结果表明限位效果良好。给出了组合限位器参数对隔震层与上部结构动力响应的影响规律。

[关键词]  近断层地震; 基础隔震; 组合限位器; 软碰撞

中图分类号  P315      文献标识码 A      文章编号：1002-848X(2013)S1-1237-05

*北京市教育委员会科技计划重点项目、北京市自然基金重点项目（KZ201110016020）。

作者简介：韩淼，博士，教授，Email: hanmiao@bucea.edu.cn。

Analysis of combination limiting deformation to base isolation layer under near-field ground motion

Han Miao, Guo Fengming, Jiang Yue

(School of Civil Engineering & Traffic Engineering, Beijing University of Civil Engineering & Architecture, Beijing 100044, China)

Abstract:  The near-field pulse-type ground motion will bring about large deformation of base isolation layer. The isolation bearings will buckle instability and the isolation system will be destroyed. Method of soft collision limiting deformation is proposed. The combination limiting devices are installed in isolation layer. The test model is designed. The dynamic responses of the model under near-field ground motion are calculated by means of software for calculation SAP 2000. The results of 36 kinds of conditions are analyzed. The limiting deformation effect of combination limiting devices is favorable. The rules between dynamic response of isolation layer and super-structure and different parameters of combination limiting devices are put forward.

Keywords:  near-field ground motion; base isolation; combination limiting devices; soft collision