吉林西部中强地震土层地表地震动衰减关系  

Ground motion attenuation relationship of soil surface under moderate earthquakes in west region of Jilin Province

作　　者：吴兆营[1] 刘红帅 迟天峰[1] 丁广[1] 

机构地区：[1]吉林省地震局,吉林长春130117 [2]地壳运动监测工程研究中心,北京100036

出　　处：《自然灾害学报》2015年第4期219-226,共8页Journal of Natural Disasters

基　　金：吉林省重点科技攻关项目(20150204002SF)

摘　　要：收集整理了2013年吉林前郭Ms5.8级震群的地表强地震动记录,进行了常规处理,剔除了异常记录,分析了峰值加速度的分布特征。计算了正常记录的加速度反应谱,采用最小二乘法,统计给出了吉林西部地区土层地表水平向和垂直向20个周期点的加速度反应谱衰减关系,对比分析了地震动的衰减特性,并用震害调查结果检验了峰值加速度衰减关系。结果表明:所得到的吉林西部地区土层地表衰减关系明显低于中国东部的地震动衰减关系。The recordings of ground motion in 2013 Qianguo Ms5.8 earthquake sequences in Jilin Province were collected and sorted out, their routine process was conducted, abnormal recordings were rejected and the distribution characteristics of peak acceleration were analyzed. The acceleration response spectra of normal records were calculated. Using the least square method, the attenuation relationships of horizontal and vertical soil surface acceleration spectra with 20 periods for west region of Jilin Province were provided. The attenuation characteristics were compared with the existing China-East past attenuation relationships and the peak acceleration attenuation relationship was verified. The results show that the obtained attenuation relationships of seismic surface motion in western region of Jilin Province are significantly lower than the corresponding China-East attenuation relationships.

关 键 词：吉林前郭5.8级震群 吉林西部地区 中强地震 土层地表 地震动衰减关系 

分 类 号：TU4[建筑科学—土工工程]