安宁河及邛海周边地区地脉动特征分析  

Characteristics Analysis of Ground Micro-tremor in Surrounding Area of Anning River and Qionghai Lake

作　　者：李平[1,2] 薄景山[1,2] 孙有为[2] 张宇东[2] 李孝波[1] 赵金鑫[1] 万卫[1] 

机构地区：[1]中国地震局工程力学研究所,黑龙江哈尔滨150080 [2]防灾科技学院,河北三河065201

出　　处：《地震研究》2013年第1期81-85,141,共5页Journal of Seismological Research

基　　金：中国地震局教师科研基金(20110108);国家自然科学基金项目(50978237);地震行业科研专项(201008006);中央高校基本科研业务专项资金(ZY20110102)联合资助

摘　　要：根据地脉动测试获得的安宁河和邛海周边地区45个场点的地脉动数据,采用谱分析方法对所测得的数据进行处理。结合场地条件对地脉动谱曲线进行分析总结,得到了该区地脉动频谱特性,给出了不同场地条件下的场地地脉动卓越周期建议值,所得结果可以为西昌市防震减灾规划提供场地背景资料和分析依据,也可为西昌市以后的工程场地选址、场地类别划分和结构抗震设计等提供参考。According to the ground micro-tremor test, we obtained ground micro-tremor data recorded by 45 measur- ing points in surrounding area of Anning River and Qionghai Lake, and processed the data by spectral analysis. We analyzed and summarized the characteristic of spectral curve of ground micro-tremor, obtained spectrum characteristics of ground micro-tremor, and gave the advised values of predominant period of site ground micro- tremor in study area according to different site conditions. The results not only provided the site background in- formation and analysis basis in the planning of Xichang seismic disaster prevention and mitigation, but also pro- vided meaningful references for the engineering site selection, site type classification and structural seismic de- sign in Xichang in future.

关 键 词：西昌市 地脉动 卓越周期 谱分析方法 

分 类 号：P315.9[天文地球—地震学]