四川汶川8．0级地震山西数字强震动记录特征与分析  

Characteristics and analysis of digital strong motion records of Wenchuan M 8.0 earthquake in Sichuan Province recorded in Shanxi Province

作　　者：徐扬[1] 赵向佳[1] 高树义[1] 赵晋泉[1] 

机构地区：[1]山西省地震局,中国太原030021

出　　处：《地震地磁观测与研究》2009年第2期100-105,共6页Seismological and Geomagnetic Observation and Research

摘　　要：对2008年5月12日四川汶川8．0级地震，山西数字强震动台网27个台的地震加速度记录，进行了处理和分析，包括对加速度波形数据的基线校正，滤波，加速度傅立叶和反应谱计算，以及速度和位移计算。结果表明：局部场地的介质特性对地震动特征有相当大的影响，较厚的覆盖土层对较长周期的地震波有明显的放大作用。厚覆盖土层场地的强震动观测对自振周期较长建筑物的抗震设计具有重要的意义。In this paper, the seismic acceleration records of Wenchuan M 8.0 earthquake of in Sichuan Province on May 12, 2008, recorded by 27 stations of the Digital Strong Motion Network of Shanxi, are processed and analyzed, including the baseline corrections of acceleration waveform, filtering, Fourier and response spectrum calculations, as well as velocities and displacements computation. The results show that medium properties under local sites have quite large effect on ground motions, and the long period seismic waves are magnified by thick soil layers over the bedrocks. It is important to make strong motion observations on sites of thick deposited soil layers for anti-seismic designs of the buildings with long resonant period.

关 键 词：强震动记录 四川汶川8级地震 场地影响 长周期地震波 

分 类 号：P315.63[天文地球—地震学]