地震工程学报2017，Vol.39Issue(2)：221-226,247,7.DOI:10.3969/j.issn.1000-0844.2017.02.0221
基于NGA数据的震源模型全局参数定标律的统计
Scaling Laws of the Global Parameters of Source Models from NGA Data
摘要
Abstract
To develop scaling laws for source models, two data sets of global parameters are compiled from the data of reference [3] with modified and supplied by the NGA data bases.These data include parameters of 189 and 204 earthquakes, among which 127 from reference [3], 31 modified from NGA, 31 and 46 newly collected respectively from the two versions of NGA data bases.Empirical and semi-empirical relations between moment magnitude and four source global parameters;the area, width, and length of the rupture plane;and the average slip on the plane are presented for three rupture types and five (three) magnitude intervals.The result coefficient values of the relations do not differ significantly from those in reference [3], and the largest relative differences are 12.4% and 8.4%.The deviations of data to the relations appear to decrease, i.e., the larger the data set, the more stable the statistical relation.To demonstrate the effect of the improvement in this paper, high-frequency ground motions at four near fault points are synthesized by means of source models established for a M7.0 strike slip shock with the scaling laws.The results show higher mean spectral amplitudes and peak values than those determined by reference [3].The relative differences of the means are about 4.6%~23.0% and decrease with increasing distance.关键词
NGA/震源模型/地震动/全局参数/定标律Key words
NGA/source model/ground motion/global source parameter/scaling law分类
天文与地球科学引用本文复制引用
姜伟,陶夏新,赵凯..基于NGA数据的震源模型全局参数定标律的统计[J].地震工程学报,2017,39(2):221-226,247,7.基金项目
国家自然科学基金项目(51178151,51178435,51478443) （51178151,51178435,51478443）
国家国际科技合作项目(2011DFA21460) （2011DFA21460）
