1/4波长法和水平垂直谱比法场地放大反应差异性分析--以西克尔镇为例  

ANALYSIS OF DIFFERENCES IN SITE AMPLIFICATION RESPONSE BETWEEN QUARTER WAVELENGTH METHOD AND HORIZONTAL VERTICAL SPECTRAL RATIO METHOD:A CASE OF XIKEER TOWN

作　　者：李文倩[1] 孙静[1] 李姗姗[2] LI Wen-qian;SUN Jing;LI Shan-shan(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830000,Xinjiang,China;Korla Seismic Station of Earthquake Agency of Xinjiang Uygur Autonomous Region,Korla 841000,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011 [2]新疆维吾尔自治区地震局库尔勒地震监测中心站,新疆库尔勒841000

出　　处：《内陆地震》2023年第3期232-238,共7页Inland Earthquake

基　　金：中国地震局地震工程与工程振动重点实验室重点专项(2020EEEVL0203);中国地震局地震科技星火计划(XH20068Y).

摘　　要：利用土层剪切波速数据及强震动记录,分别采用1/4波长法及水平垂直谱比法,得到了西克尔镇场地放大反应曲线。对比发现1/4波长法可以较好的估计场地放大反应,但不能准确估计场地卓越频率;水平垂直谱比法可以较好估计场地卓越频率,但得到的场地放大反应偏小。在研究区,水平垂直谱比法估计场地放大反应偏小约1~2.5倍,尤其是周期在0.08~0.2 s范围内,场地放大反应偏小2.5倍左右。Using soil shear wave velocity data and strong motion records,the 1/4 wavelength method and horizontal vertical spectral ratio method were used to obtain the amplified response curve of the Xikele Town site.By comparison,it was found that the 1/4 wavelength method can better estimate the amplification response of the site,but cannot accurately estimate the predominant frequency of the site;The horizontal vertical spectral ratio method can better estimate the dominant frequency of the site,but the resulting amplification response of the site was relatively small.In the research area,the horizontal to vertical spectral ratio method estimated that the site amplification response was about 1~2.5 times smaller,especially when the period was within the range of 0.08~0.2 s,the site amplification response was about 2.5 times smaller.

关 键 词：场地放大反应 1/4波长法 水平垂直谱比法 竖向地震动放大 

分 类 号：P315.9[天文地球—地震学]