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

作　　者：姜伟[1,2] 陶夏新[1,3] 赵凯[1,4] JIANG Wei TAO Xia-xin ZHAO Kai(Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, Heilongjiang, China Engineering College of Heilongjiang Bayi Agricultural University , Daqing 163319, Heilongjiang, China School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China Architectural Design Institute Co., LTD, Beijing 100044, China)

机构地区：[1]中国地震局工程力学研究所,黑龙江哈尔滨150080 [2]黑龙江八一农垦大学工程学院,黑龙江大庆163319 [3]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090 [4]中国建筑设计院有限公司,北京100044

出　　处：《地震工程学报》2017年第2期221-226,247,共7页China Earthquake Engineering Journal

基　　金：国家自然科学基金项目(51178151;51178435;51478443);国家国际科技合作项目(2011DFA21460)

摘　　要：依据美国NGA两个版本的数据库,修正、补充了文献[3]的震源全局参数基础数据,形成分别包含189个地震的数据1和204个地震的数据2,分别在三种破裂类型、五(三)个震级段,统计得出矩震级与破裂面的面积、宽度、长度以及破裂面上平均错动量四个震源全局参数之间的经验关系和半经验关系。与文献[3]的结果比较表明,数据量增加后系数值的差异不明显,最大相对差分别为12.4%和8.4%,且统计结果离散减小,稳定性增加。采用本文结果建立震源模型,对一个7.0级走滑地震合成的近场4个地表点的高频地震动,得到的平均反应谱幅值、峰值总体上略大于用文献[3]参数合成的,平均值的相对差在4.6%~23.0%间,随距离增加差别有所减小。To develop scaling laws for source models, two data sets of global parameters are com- piled from the data of reference [3] with modified and supplied by the NGA data bases. These da ta include parameters of 189 and 204 earthquakes, among which 127 from reference [3], 31 mod- ified 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 param- eters; the area, width, and length of the rupture plane; and the average slip on the plane are presented for three ues of the relations differences are 12.4 the larger the data rupture types and five （three） magnitude intervals. The result coefficient val- do not differ significantly from those in reference [3], and the largest relative % and 8.4%. The deviations of data to the relations appear to decrease, i.e., set, the more stable the statistical relation. To demonstrate the effect of theimprovement 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 

分 类 号：P315[天文地球—地震学]