目标谱与调幅方法对地震动选择的影响分析  

Investigation of effects of target spectrum and amplitude scaling methods on selection of ground motions

作　　者：吕大刚[1,2] 刘亭亭[1,2] 李思雨 于晓辉[1,2] LV Dagang;LIU Tingting;LI Siyu;YU Xiaohui(Key Lab of Structures Dynamic Behavior and Control of China Ministry of Edueation,Harbin Institute of Technology Harbin 150090,China;Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology,Harbin Institute of Technology,Harbin 150090,China;Beijing CBIM Technology Corperation,Ltd.,Beijing 100085,China)

机构地区：[1]哈尔滨工业大学结构工程灾变与控制教育部重点实验室,黑龙江哈尔滨150090 [2]哈尔滨工业大学土木工程智能防灾减灾工业和信息化部重点实验室,黑龙江哈尔滨150090 [3]北京云建信科技有限公司,北京100085

出　　处：《地震工程与工程振动》2018年第4期21-28,共8页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51678209;51408155;51378162);国家科技支撑计划课题(2013BAJ08B01)~~

摘　　要：基于概率地震危险性分解得到的设定地震,从PEER NGA地震动数据库中选出与西安地区场地条件相似的地震动记录,以一致危险谱、设定谱、条件均值谱作为目标谱,采用单点调幅、平均谱比调幅、等谱强度调幅、最小平方误差调幅、最小移动均值调幅方法对地震动进行选择和调幅,最后将选取的地震动记录输入到SDOF体系中,并将延性系数和Park-Ang损伤指数作为需求参数,对不同目标谱和不同调幅方法所选的地震动记录进行评价。结果表明:不同目标谱选取的地震动记录对需求参数的平均值和变异系数影响小于不同调幅方法对其的影响。The scenario earthquakes are obtained by the deaggregation of probabilistic seismic hazard analysis,the ground motions select from the PEER strong motion database which are suitable to the site of Xi＇an region. The target spectra are the uniform hazard spectra,the scenario spectra and the conditional mean spectra,taking the single point scaling,the average spectral ration scaling,the equal spectral intensity scaling,the minimum squared error scaling and the least moving average scaling methods,to evaluate the influences of different selecting and scaling methods by the ductility coefficient and the Park-Ang damage index of the single degree of freedom system. The results show that,compared to the different scaling method,the influence of mean value and coefficient of variation of the demand measures based on the different target spectrum are smaller.

关 键 词：目标谱 调幅方法 SDOF体系 平均值 变异系数 

分 类 号：P315.9[天文地球—地震学]