钢筋混凝土框架结构体系地震易损性的D-Vine Copula分析  

D-Vine copula analysis for seismic vulnerability of RC frame structural system

作　　者：刘月飞 樊学平[1,2] LIU Yue-fei;FAN Xue-ping(Key Laboratory of Mechanics on Disaster and Environment in Western China of the Ministry of Education,Lanzhou University,Lanzhou 730099,China;School of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730099,China)

机构地区：[1]兰州大学西部灾害与环境力学教育部重点实验室,兰州730099 [2]兰州大学土木工程与力学学院,兰州730099

出　　处：《吉林大学学报（工学版）》2022年第5期1071-1078,共8页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家重点研发计划项目(2019YFC1511005);国家自然科学基金项目(51608243);甘肃省自然科学基金面上项目(20JR10RA625,20JR10RA623);中央高校基金面上项目(lzujbky-2020-55)。

摘　　要：提出一种考虑多个失效模式相关的钢筋混凝土(RC)框架结构整体地震易损性VineCopula分析方法。首先,采用条带法建立单个构件的概率地震需求模型,针对轻微破坏、中等破坏、严重破坏、完全破坏4种极限状态进行单个构件的地震易损性分析;然后,引入D-Vine Copula模型刻画多个失效模式之间的相关关系,并结合单个构件的地震易损性分析结果,实现考虑各失效模式相关的RC框架结构整体地震易损性分析;最后,通过一个6层RC框架结构对本文方法进行验证,研究结果表明:不考虑失效模式相关的RC框架结构整体地震易损性分析结果偏于保守。本文方法为为复杂结构体系的整体地震易损性分析提供于新的研究思路。This paper presents the D-Vine Copula analysis method for the seismic vulnerability of RC frame structures considering the correlation among the multiple failure modes.Firstly,the strip method is used to build the probabilistic seismic demand model of the single component,and the seismic vulnerability analysis of the single component is carried out for four limit states(e.g.slight damage,medium damage,serious damage and complete failure);secondly,D-Vine Copula model is used to describe the correlation among the multiple failure modes.With the seismic vulnerability analysis results of the single component,the seismic vulnerability analysis of RC frame structural system can be made considering the correlation among the multiple failure modes.Finally,a six-story RC frame structure is provided to illustrate the feasibility of the proposed method,and the research results show that the seismic vulnerability analysis of RC frame structures without considering the correlation among the multiple failure modes is more conservative.The method in this paper provides the new research idea for the seismic vulnerability analysis of the complex structural systems.

关 键 词：结构工程 地震易损性 条带法 D-Vine Copula模型 相关性 

分 类 号：TU391[建筑科学—结构工程] TU392.5