近断层地震下不规则串联隔震结构的倒塌模拟

英文篇名：Collapse Simulation of Irregular Serial Isolation Structures Subjected to Near-Fault Seismic Motion
中文刊名：土木工程与管理学报
英文刊名：Journal of Civil Engineering and Management
作者：杜永峰 ; 朱翔
英文作者：DU Yong-fenga ; ZHU Xiangb(a.Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education ; b.Institute of Earthquake Protection and Disaster Mitigation ; Lanzhou University of Technology ; Lanzhou 730050 ; China)
中文关键词：近断层 ; 串联隔震结构 ; 平面不规则 ; 扭转 ; 倒塌模拟
英文关键词：near-fault ; serial isolation structures ; plane irregular ; torsion ; collapse simulation
出版日期：2012-12-15
机构：兰州理工大学西部土木工程防灾减灾教育部工程研究中心;兰州理工大学防震减灾研究所;
年：2012
期：04
出版单位：土木工程与管理学报

摘要

串联隔震结构目前在国内外都比较常见,其安全性也得到了广泛的关注。而且串联隔震结构的自振周期较长,所以近断层地震动对串联隔震结构的抗震性能有不利的影响。本文分析了平面不规则串联隔震结构在近断层地震作用下的抗震性能,并对其进行了倒塌过程模拟。运用MSC.MARC建立平面不规则串联隔震结构和非隔震结构模型,选择不同的地震动输入进行非线性仿真分析。通过比较近断层地震作用下平面不规则串联隔震结构与非隔震结构的动力响应,并总结其规律;对隔震与非隔震结构建立倒塌模型,分析两种结构的抗倒塌能力。研究表明:近断层地震作用下平面不规则串联隔震结构的扭转效应相对于非隔震结构的扭转效应明显减小。同时,倒塌模拟表明,平面不规则的非隔震结构较串联隔震结构容易倒塌。
The serial isolation structures are currently more common around the world.Its safety has been widely concerned.The serial isolation structures of the natural period are long,so the near-fault seismic motion on the seismic performance of serial isolation structures has an adverse effect.This paper analyzes the seismic performance and the collapse simulation of plane irregular serial isolation structures subjected to near-fault seismic motion.Plane irregular serial isolation structure model and non-isolated structure model are established based on MSC.MARC.Different seismic motions were chosen as input to analyze non-linear simulation of these two structures.the dynamic response of plane irregular serial isolation structure and non-isolated structure subjected to near-fault seismic motion were compared.Isolation and non-isolated structure collapsed model were built to analyze resisting collapsed ability of two structures.The results show that the torsion effect of plane irregular serial isolation structure subjected to near-fault seismic motion relative to that of the non-isolated structure obviously decreases.Meanwhile,the collapse simulation show that plane irregular non-isolated structure is easier to collapse than plane irregular serial isolation structure.

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