设计加速度反应谱和设计地震分组  

Design acceleration response spectrum and design seismic subgroup

作　　者：符圣聪[1] 黄世敏[1] 杨沈[1] 江静贝[1] Fu Sheng-cong;Huang Shi-ming;Yang Shen;Jiang Jing-bei(China Academy of Building Research,Beijing 100013,China)

机构地区：[1]中国建筑科学研究院,北京100013

出　　处：《工程抗震与加固改造》2021年第6期144-148,共5页Earthquake Resistant Engineering and Retrofitting

摘　　要：实际地震动加速度谱曲线的短周期段、中周期段和长周期段所分别对应的加速度谱、速度谱和位移谱可近似看作是常量。因此,可以预估设计加速度谱曲线的基本形态和基本表示式。该式有3个待定参数。通过对几百条实际地震动加速度谱曲线逐条拟合分析确定。经统计分析分别给出各参数与震级大小、震源距和场地条件等因素相关的衰减关系。可用场址的地震动危险性概率分析方法,给出场址设计谱参数的概率估计,绘制与设计谱相匹配的地震区划图。此外,本文还讨论了与震级相关的设计地震分组。The acceleration spectra, velocity spectra and displacement spectra, corresponded respectively to the acceleration response spectra curve of ground motions for the high, intermediate and low frequency ranges, are approximatively constant. Therefore the fundamental shape and expressions of the design acceleration spectra curve may be predicted. The expressions should contain 3 parameters to be determined, The more 700 actual acceleration spectral curves may be simulated one by one to determine parameters. The attenuation relationship between these parameters and magnitude, fault distance, average shear wave velocity at sites can be found. The method of earthquake risk probabilistic analysis at sites may be used to give probability estimate of design spectra parameters and to produce seismic zoning maps matched to the design spectra. In addition, the design seismic subgroup associated earthquake magnitude problem will be also discussed in this paper.

关 键 词：设计反应谱 特征周期 转换周期 场地系数 设计地震分组 

分 类 号：P315.95[天文地球—地震学]