基于汶川8.0级强震记录的近场地震动特征分析  

Analysis on Characteristics of Near-fault Ground Motions Based on M8.0 Wenchuan Earthquake

作　　者：李英成[1] 陈清军[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《灾害学》2012年第1期17-22,共6页Journal of Catastrophology

基　　金：科技部国家重点实验室基础研究资助项目(SLDRCE08-B-03);国家自然科学基金资助项目(50978198)

摘　　要：在汶川8.0级大地震中,国家数字强震动台网布设在龙门山断裂带及其周围地区的50多个台站获得了大于100 Gal的加速度记录。选取其中断层附近11个台站的加速度记录,分别进行了地震反应谱分析和基于正交化HHT法的能量分布特征分析,通过对竖向与水平向加速度峰值比、竖向与水平向加速度反应谱比值,以及能量分布和峰值系数的分析与比较,探讨了汶川地震的近场地震动特征。In the Longmenshan fault zone and surrounding area, more than 50 stations of China Strong Motion Net Center （ CSMNC ） got acceleration records, of which peak is bigger than 100gal in the 5.12 Wenchuan earthquake. In this paper, thirty-three near-fault ground motions from eleven stations were selected. The seismic response spectrum analysis and energy distribution analysis based on orthogonal HHT method were adopted to study the vertical to horizontal acceleration peak ratio, acceleration response spectral ratio, energy time-frequency distribution and peak coefficient. The results were compared and analyzed to discuss the characteristics of near-fault Ground Motions of M8.0 Wenchuan Earthquake.

关 键 词：汶川8.0级强震记录 近场地震动特征 地震反应谱分析 正交化HHT法 能量分布 

分 类 号：P315.9[天文地球—地震学]