基于改进的经验格林函数方法的地震动模拟  

Ground Motion Simulation Based on Improved Empirical Green's Function Method

作　　者：李启成[1] 杜玉春[1] 严冬冬[1] 裴蕾[1] 

机构地区：[1]辽宁工程技术大学,辽宁阜新123000

出　　处：《地震研究》2013年第1期74-80,共7页Journal of Seismological Research

基　　金：黑龙江省教育厅2011年科研项目(12513082)资助

摘　　要：改进的经验格林函数方法弃掉以往完全用经验方法确定用于合成大震的小震数目的方法,考虑了大地震断层各个子断层位错的不均匀性,使得经验格林函数方法的物理意义更加清楚。用改进的经验格林函数方法,以汶川MS6.4余震记录作为经验格林函数模拟了九寨白河台、松潘安宏台、皋兰台和成都中和4个台站的加速度时程,与以往的经验格林函数方法比较,模拟结果的反应谱与记录符合得更好,证明了改进的经验格林函数方法可以反映震源位错的复杂分布,可以在工程地震中用来估计场地地震动过程。The improved Empirical Green＇s Function method considers the displacement heterogeneity at each sub- faults of fault of main shock, makes the physical meaning of Empirical G^een＇s Function method clearly, and a- bandons previous empirical method which confirms small earthquake numbers used to synthesize main shock. We use Wenchuan Ms6. 4 aftershock records as the Empirical Green＇s function, and simulate the acceleration time histories at Baihe Station in Jiuzhai County, Anhong Station in Songpan Country, Gaolan Station and Zhonghe Station in Chengdu by the improved Empirical Green＇s function method. Compared with former results by Empir- ical Green＇s function method, response spectrums in the simulation results are more closer to the records, which prove the complicated distributions of epicenter displacements can be reflected by the improved Empirical Green＇s function method, this method can be used to estimate site ground motion processes in engineering seismology.

关 键 词：经验格林函数方法 地震动 反应谱 汶川地震 

分 类 号：P315.9[天文地球—地震学]