基于钢筋混凝土框架结构抗地震倒塌估计的输入地震动选取方法研究  

Study on ground motion selection method based on seismic collapse estimation of reinforced concrete frame structures

作　　者：徐龙军 陈亚彬 于越 赵国臣[5] 谢礼立 Xu Longjun;Chen Yabin;Yu Yue;Zhao Guochen;Xie Lili(State Key Laboratory of Precision Blasting,Jianghan University,Wuhan 430056,China;Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering,Fujian University of Technology,Fuzhou 350118,China;School of Civil Engineering,Fujian University of Technology,Fuzhou 350118,China;Stanford University,San Francisco 94305,USA;Harbin Institute of Technology at Weihai,Weihai 264209,China)

机构地区：[1]江汉大学精细爆破国家重点实验室,湖北武汉430056 [2]福建工程学院福建省土木工程新技术与信息化重点实验室,福建福州350118 [3]福建工程学院土木工程学院,福建福州350118 [4]斯坦福大学,美国旧金山94305 [5]哈尔滨工业大学(威海),山东威海264209

出　　处：《土木工程学报》2023年第7期12-22,共11页China Civil Engineering Journal

基　　金：国家自然科学基金重点项目(U2139207);山东省中央引导地方科技发展资金(YDZX20203700001129)。

摘　　要：结构抗地震倒塌(简称抗倒塌)估计是新一代性态抗震设计的重要内容,如何选取少量代表性地震动准确评估结构抗倒塌能力是近年来地震动选取引人关注的研究之一。文章采用增量动力分析法(简称IDA)研究了与结构抗倒塌估计相关的两个地震动强度指标:地震持时和0~10 s周期的位移谱平均值;并基于此提出了基于分层抽样的地震动选取方法;最后通过对多个混凝土框架结构(RCF)抗倒塌能力的分析,验证了文章方法的有效性,并给出了合理估计结构抗倒塌能力的地震动最小数量。Structural seismic collapse estimation plays an important role in the up-to-date performance-based seismic design,and how to select some representative ground motions(GM)to reasonably estimate the structural anti-collapse capacity is one of the appealing research topics in recent years.In this work,the incremental dynamic analysis(simplified as IDA)method is used to analyze the relationship between GM intensity parameters and structural collapse capacity estimation.Two parameters include the around motion duration and including the earthquake duration and the average spectral displacement from 0 s to 10 s.By adopting the two parameters,a new GM selection method using the stratified sampling method is proposed.Furthermore,the efficiency of the present method is validated based on the seismic collapse estimation for several reinforced concrete frames(simplified as RCF),and the minimum number of ground motions which may reasonably estimate the structural collapse capacity is given.

关 键 词：抗地震倒塌估计 增量动力分析 地震持时 位移谱 分层抽样 

分 类 号：TU375.4[建筑科学—结构工程] TU311.3