基于统计公式和小波算法的主余震匹配方法  

Mainshock-aftershock matching method based on statistical formula and wavelet algorithm

作　　者：钟岱辉[1] 纪西超 ZHONG Daihui;JI Xichao(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101

出　　处：《山东建筑大学学报》2024年第4期1-7,24,共8页Journal of Shandong Jianzhu University

摘　　要：利用小波算法匹配等效响应谱得到以B、C类场地任意地震波为主震的等效主余震,可为获得人工主余震地震波提供参考依据。选取6条实测主余震序列,从等效主余震和主震、等效主余震和主余震序列两方面对其展开研究,并以一栋6层钢筋混凝土(Reinforced Concrete,RC)框架结构为例分析等效主余震的适用性。结果表明:主震主导等效主余震的响应谱和损伤谱,等效主余震较主震产生明显的增量损伤,显示出等效主余震具备与主余震序列基本一致的特性;等效主余震和主余震序列具有相似的响应谱,两者对单自由度体系及RC框架结构造成的损伤大致相同,说明等效主余震能较好地模拟实测主余震序列。The wavelet algorithm is used to match the equivalent response spectrum to obtain the equivalent mainshock-aftershock whose mainshock is arbitrary seismic waves of class B and class C sites,providing a reference for obtaining artificial mainshock-aftershock seismic waves.Six measured mainshock-aftershock sequences are selected as the research objects.Furthermore,the research is carried out from two aspects,which are equivalent mainshock-aftershock and mainshock,equivalent mainshock-aftershock and mainshock-aftershock sequence.Taking a Reinforced Concrete(RC)frame structure of six story as an example,the applicability of equivalent mainshock-aftershock is analyzed.The results show that the mainshock dominates the response spectrum and damage spectrum of the equivalent mainshock-aftershock,and the equivalent mainshock-aftershock has obvious incremental damage compared with the mainshock,indicating that the equivalent mainshock-aftershock has the same characteristics as the mainshock-aftershock sequence.The equivalent mainshock-aftershock and the mainshock-aftershock sequence have similar response spectrum,and the damage caused by the two to the single-degree-of-freedom system and the RC frame structure is roughly equal,indicating that the equivalent mainshock-aftershock can simulate the measured mainshock-aftershock sequence better.

关 键 词：主余震序列 统计公式 小波算法 损伤指数 

分 类 号：TU311.3[建筑科学—结构工程]