近断层地震动速度、位移峰值衰减规律的研究  

Research on attenuation of near fault peak strong ground motion velocity and displacement

作　　者：冯启民[1] 邵广彪[1] 

机构地区：[1]中国海洋大学工程学院,山东青岛266071

出　　处：《地震工程与工程振动》2004年第4期13-19,24,共8页Earthquake Engineering and Engineering Dynamics

基　　金：山东省优秀中青年科学家奖励基金(02BS004)

摘　　要：在全球范围内选取6.0≤Mw≤7.6、震源深度H≤20km且断层距df≤40km的地震动速度和位移峰值数据,进行分组统计分析,确定了PGV和PGD的近断层研究区域分别为20km和15km。认为两水平分量为2条独立数据,在各自研究区域分别得到由366条PGV和265条PGD数据组成的数据库;其中水平方向分为硬土和软土2类场地,竖向只考虑土层场地,利用作者前文已提出的近断层地震动衰减模型和最小二乘法进行数据拟合分析,得到PGV和PGD随断层距和震源深度变化的衰减曲面,分析了水平、竖向以及竖向与水平比值的衰减规律。The fault distances of PGV and PGD, 20km and 15km, were drawn from the mean statistics of records, which were selected from worldwide earthquakes M_(w) =6.0～7.6 with depth≤20km and fault distance≤40km. Regarding horizontal records as two random data, there are 366 and 265 records in PGV and PGD data bank respectively. Soil and soft soil sites were taken into account in horizontal and only soil site in vertical. PGV and PGD attenuation surfaces were drawn using least square method and the near-fault attenuation model proposed by authors. PGV and PGD near-fault including horizontal and vertical and V/H attenuation relationships are analyzed.

关 键 词：近断层 地震动速度峰值(PGV) 地震动位移峰值(PGD) 衰减规律 

分 类 号：P315.91[天文地球—地震学]