摘要
大震与中小震之间的地震动衰减规律有所不同。本文使用了132条欧洲基岩水平向记录研究中小震地震动衰减规律。震级范围在地方震级4～6级，距离在震源距70km以内。本文得到了峰值加速度和5％阻尼比、周期0．04～4．00秒之间的加速度反应谱的衰减关系。通过与欧洲和美国西部地震动衰减关系对比，分析了在地震活动性不同的地区内，大震与中小震之间存在的差异有何不同。
There are very significant differences between strong and small-moderate earthquakes, for example, the ground motion of small-moderate earthquakes attenuate more fast, transmit a smaller distance and have more high frequency components. We use 132 small-moderate horizontal recordings on rock in Europe to study the attenuation relationship. Local magnitudes are between 4 and 6, hypocenter distances are less than 70kin. We obtain the attenuation equations for PGA and 5 % damp SA at spectra periods between 0.04 and 4 seconds. We make comparisons between the attenuation relations of Europe and America, and then analyze the discrepancies between the strong and small- moderate earthquakes in different seismicity areas.
出处
《中国地震》
CSCD
北大核心
2009年第2期170-177,共8页
Earthquake Research in China
基金
国家科技支撑计划课题“强震危险区划关键技术研究”(2006BAC13B01)资助
