强震动记录选取的目标谱确定方法  

Method for determination of target spectrum by selecting strong motion records

作　　者：李琳[1,2] 温瑞智[1] 冀昆[1] 

机构地区：[1]中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [2]哈尔滨学院,黑龙江哈尔滨150086

出　　处：《世界地震工程》2016年第1期188-194,共7页World Earthquake Engineering

基　　金：中国地震局工程力学研究所基本科研业务费专项(2014B06)

摘　　要：在结构动力时程分析中,选取不同的强震动记录会导致结构反应的离散性。基于地震动加速度峰值及反应谱衰减关系,提出了一种新的目标谱。在现有强震动记录数据的基础上,按场地条件匹配目标谱分布进行记录选取。以7度抗震设防罕遇地震为例,将选波结果应用于一钢筋混凝土框架结构进行非线性动力时程分析,并与非线性静力推覆分析结果进行了比较。结果表明,该方法确定的目标谱较规范标准谱具有更真实的谱形,可为结构抗震设计提供参考。The different selections of strong ground motion records lead to the discretness of structural dynamic responses. This paper proposes to build a new target spectrum,based on PGA and spectral acceleration attenuation relationship. On the basis of existing strong ground motion record data and according to site conditions,the strong motion records are selected to match the target spectral shape. Taking the Intensity 7 fortification earthquake as an example,the selected wave was used to dynamic nolinear time history analysis of a RC frame structure,and the result was compared with that from nonlinear push-over analysis. Comparisons show that the object spectrum determined by proposed method possesses more true spectrum shape and may give a reference to structural seismic design.

关 键 词：反应谱 强震动记录 时程分析 目标谱 

分 类 号：P315[天文地球—地震学]