| 欧洲中小震基岩水平向地震动衰减关系研究 |
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| 引用本文： | 靳超宇,俞言祥.欧洲中小震基岩水平向地震动衰减关系研究[J].中国地震,2009,25(2). |
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| 作者姓名： | 靳超宇 俞言祥 |
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| 作者单位： | 中国地震局地球物理研究所,北京市海淀区民族大学南路5号,100081 |
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| 基金项目： | 国家科技支撑计划课题"强震危险区划关键技术研究" |
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| 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.
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| 关 键 词： | 中小地震 地震动 峰值加速度 加速度反应谱 衰减关系 地震活动性 |
Attenuation Relationships for Horizontal Ground Motion on Rock of Small-moderate Earthquakes in Europe |
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| Jin Chaoyu,Yu Yanxiang.Attenuation Relationships for Horizontal Ground Motion on Rock of Small-moderate Earthquakes in Europe[J].Earthquake Research in China,2009,25(2). |
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| Authors: | Jin Chaoyu Yu Yanxiang |
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| Abstract: | 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 70km. 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. |
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| Keywords: | Small-moderate earthquake Ground motion PGA SA Attenuation relationship Seismicity |
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