基于谱比法的我国强震台站场地分类  

SITE CLASSIFICATION FOR STRONG EARTHQUAKE STATIONS IN CHINA USING SPECTRAL RATIO METHOD

作　　者：温瑞智[1] 冀昆[1] 任叶飞[1] 王宏伟[1] 

机构地区：[1]中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080

出　　处：《岩石力学与工程学报》2015年第6期1236-1241,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(51308515);公益性行业科研资助项目(201208014)

摘　　要：目前我国强震台网的部分台站场地资料尚不完整,很大程度限制了我国强震数据的广泛应用。为改变这一现状,利用日本KiK-net台站的场地钻孔资料和强震记录,按照规范对其中279个台站进行场地分类,利用谱比法统计我国Ⅰ,Ⅱ,Ⅲ三类场地的标准谱比曲线,并通过分析谱比曲线卓越周期、谱比峰值和谱形差异,提出适合我国抗震规范场地类别划分的经验方法。利用四川地区的强震台站钻孔资料进行方法验证,说明地域性差异对本场地分类方法准确率的影响不大。最后,处理了中国大陆2007~2011年的强震记录,按照该方法对113个强震台站进行场地分类。Site conditions of some strong earthquake stations in China are still unknown,which greatly restrict the effective application of strong earthquake records. A site classification scheme was proposed based on the strong earthquake data from Japanese KiK-net stations according to standard,and the mean site classification curves in China were calculated using the spectral ratio method from 279 stations of KiK-net. Then an empirical method for the site classification in China was proposed based on the range of predominant period,the peak value of spectral ratio and the spectral shape. Compared with the borehole information of stations in Sichuan province,China,the classified result shows that this method is independent of differences of regions. Finally, 113 strong earthquake stations of China were classified using the records during 2007 to 2011.

关 键 词：地震学 场地分类 谱比法 强震记录 

分 类 号：P315.78[天文地球—地震学]