首页 | 本学科首页   官方微博 | 高级检索  
     检索      

台湾集集地震近场地震动的上盘效应
引用本文:俞言祥,高孟潭.台湾集集地震近场地震动的上盘效应[J].地震学报,2001,24(6):615-621.
作者姓名:俞言祥  高孟潭
作者单位:(中国北京100081中国地震局地球物理研究所)
基金项目:国家重点基础研究发展规划《大陆强震机理与预测》项目 (G19980 4 0 70 0 )子课题 (95- 13 - 0 6 - 0 4 )资助
摘    要:1999年9月21日(当地时间)台湾集集7.6级地震是一个逆断层型地震.用回归分析法对台湾集集地震的加速度峰值数据进行分析,得出了这次地震的水平与垂直向的加速度峰值衰减关系.从残差分布上看,位于断层上盘和下盘上的加速度峰值与从衰减关系所得到的结果相比存在不同的系统偏差,断层上盘地表的加速度峰值较高,而下盘地表的加速度峰值较低.从这次地震的加速度峰值分布等值线图上也可以看出,加速度峰值的分布相对于断层呈现明显的不对称性,上盘衰减较慢而下盘衰减较快.在近断层强地面运动研究、地震危险性分析、设定地震研究与震害预测等工作中,应考虑可能地震的震源机制特点,以便使所用的衰减模型更能反映不同地震环境地区的地震动分布特征. 

关 键 词:台湾集集地震  地震动  断层上盘效应
文章编号:0253-3782(2001)06-0615-07
修稿时间:2000年11月14

EFFECTS OF THE HANGING WALL AND FOOTWALL ON PEAK ACCELERATION DURING THE CHI-CHI EARTHQUAKE, TAIWAN
Yu Yanxiang,Gao Mengtan.EFFECTS OF THE HANGING WALL AND FOOTWALL ON PEAK ACCELERATION DURING THE CHI-CHI EARTHQUAKE, TAIWAN[J].Acta Seismologica Sinica,2001,24(6):615-621.
Authors:Yu Yanxiang  Gao Mengtan
Abstract:The M 7.6 Chi Chi earthquake, Taiwan, on September 21, 1999 (local time) is a thrust fault earthquake. The empirical attenuation relations of the horizontal and vertical peak ground accelerations (PGA) for the Chi Chi earthquake are developed by regression method. By examining the residuals from the Chi Chi earthquake specific peak acceleration attenuation relations, we find that there are systematic differences between PGA on the hanging wall and footwall. The recorded peak accelerations are higher on the hanging wall and lower on the footwall. The clear asymmetry of PGA distribution to the surface rupture trace can also be seen from the PGA contour map. These evidences indicate that the PGA is attenuated faster on the hanging wall than on the footwall. In the study of near source strong motion, seismic hazard assessment, scenario earthquake and seismic disaster prediction, the style of faulting must be considered in order the attenuation model to reflect the characteristic of ground motion in various seismic environmental regions.
Keywords:Chi  Chi earthquake  ground motion  hanging  wall effect  
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《地震学报》浏览原始摘要信息
点击此处可从《地震学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号