摘要
收集新疆地区不同场地类型强震动记录,根据水平/垂直谱比法,得到了区域Ⅰ类、Ⅱ类、Ⅲ类场地平均放大曲线,场地最大放大值分别为1.5、2.4及2.6。通过分析周期为0.1、0.3、0.5、1.0、3.0 s场地放大值与PGA、PGV、PGD、等效剪切波速V_(S20)值的相关性和趋势,发现不同周期对应场地放大值与PGA、PGV、PGD相关性较弱且场地放大值均维持在一定值,但不同周期对应场地放大值与V_(S20)呈负线性相关且Ⅰ类场地放大值下降速率较快。
We collected the strong ground motion records of different site types in Xinjiang area.According to the horizontal/vertical spectral ratio method,we got the average amplification curves ofⅠ,ⅡandⅢsites,with the maximum amplification values of 1.5,2.4 and 2.6 respectively.By analyzing the correlation and trend between site amplification value at 0.1 s,0.3 s,0.5 s,1.0 s,3.0 s periods and PGA,PGV,PGD equivalent shear wave velocityV_(S20),it was found that the correlation between site amplification value at different periods and PGA,PGV,PGD was weak and the site amplification values remained at certain values.However,the site amplification value at different periods were negatively correlated with V_(S20),and the amplification value of classⅠdecreased an a faster rate.
作者
李文倩
陶正如
姚远
何金刚
LI Wen-qian;TAO Zheng-ru;YAO Yuan;HE Jin-gang(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China;Institute of Engineering Mechanics,China Earthquake Administration,Key Laboratory of Earthquake Engineering and Engineering Vibration of CEA,Harbin 150080,Heilongjiang,China;Urumqi Institute of Central Asia Earthquake,China Earthquake Administration,Urumqi 830011,Xinjiang,China)
出处
《内陆地震》
2022年第3期193-203,共11页
Inland Earthquake
基金
中国地震局地震科技星火计划(XH20068Y)
新疆维吾尔自治区科技计划重点研发项目(2020B03006-1)
国家自然科学基金(42102275).
关键词
场地放大
水平/垂直谱比法
等效剪切波速
覆盖层厚度
Site amplification
Horizontal/vertical spectral ratio method
Equivalent shear wave velocity
Overburden thickness
