基于地震响应的结构鲁棒性定量分析方法  

Study of Structural Robustness Analysis Method Based on Seismic Response

作　　者：包超[1,2] 杜永峰[1,3] 徐天妮 祁磊[1] 宋翔[1] 

机构地区：[1]兰州理工大学防震减灾研究所,兰州730050 [2]宁夏大学土木与水利工程学院,银川750021 [3]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730050

出　　处：《振动．测试与诊断》2017年第1期120-125,共6页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(51178211;51578274)

摘　　要：为了研究结构抗连续倒塌鲁棒性,基于地震作用下框架结构受力特征,结合备用荷载路径法与动力时程分析法,提出了结构鲁棒性定量分析方法,并根据震级-震中距条带地震动记录选取方法选取随机地震动记录进行算例分析和验证。研究表明,结构的鲁棒性优劣是一个相对概念,与外部作用强度呈反相关关系;通过定量分析结构鲁棒性,可以在多个结构方案筛选时提供一定的参考;降低重要构件的损伤风险,对易损性系数和重要性系数均较大的构件设置提供可靠保护,加强构件之间相互联系,提高备用荷载路径的可靠性,能够增强结构的鲁棒性。In order to study progressive-collapse resistance robustness of a frame structure, we propose a quantitative analysis method of structural robustness, based on the mechanical characteristics of the frame structure under an earthquake. We verified the correctness and practicability of this method with an example. The results showed that the quality of structural robustness was relative and negatively correlated with the load magnitude. The quantitative analysis method of structural robustness can be used for the structural design scheme selection. The structural robustness can be improved by reducing the member vulnerability coefficient of important columns, protecting the component with a large vulnerability coefficient and importance coefficient, strengthening the connection between members, and ensuring the reliability of the load path under extreme conditions. © 2017, Editorial Department of JVMD. All right reserved.

关 键 词：地震响应 结构分析 随机振动 结构鲁棒性 构件重要性系数 构件易损性系数 

分 类 号：TU375[建筑科学—结构工程] TH123.4[机械工程—机械设计及理论]