四川盆地地区地震动衰减关系  

Ground motion prediction equation of China Sichuan Basin

作　　者：冯继威 李山有[1] 王振明 

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]美国肯塔基州地质调查局,列克星敦市肯塔基州40506

出　　处：《地震工程与工程振动》2014年第4期73-82,共10页Earthquake Engineering and Engineering Dynamics

基　　金：中国地震局工程力学研究所中央级公益性科研院所基本科研业务专项基金(2011D01);国家科技支撑计划项目(2014BAK03B01)

摘　　要：利用汶川8.0（Mw7.9）级地震断层距500 km范围内217个台站记录到的主震记录,及52次矩震级范围为5.0~6.5的余震记录,计算了峰值加速度PGA,峰值速度PGV和不同周期的加速度反应谱PSA。应用回归统计分析方法建立了适应于四川盆地地区的地震动衰减关系。与其他几种模型得到的衰减关系对比分析表明,本文建立的衰减关系能适应于四川盆地地区,可为该地区的地震动预测提供参考。In this paper, we completely collect and process the ground-motion records, including the Wenchuan mainshock data well recorded by 217 stations within rupture distances of 500km ; the observation data recorded during 52 Wenchuan aftershocks, for which the moment magnitudes are ranging from 5.0 to 6.5. We get peak ground acceleration （PGA）, peak ground velocity （PGV） and response spectrum acceleration （PSA） for several different periods. Based on a regression statistical analysis of a large number of strong motion records, we derive a new ground motion Prediction Equation to use in Sichuan Basin, China. The comparisons of GMPE in this paper with other GMPEs created by other models show that GMPE in this paper is corresponding to Sichuan Basin and still can provide a reference for the ground-motion prediction in Sichuan Basin.

关 键 词：四川地区 汶川地震 矩震级 断层距 地震动衰减关系 

分 类 号：P315.73[天文地球—地震学]