| 台湾集集大地震及其余震的长周期地震动特性 |
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| 引用本文： | 李春锋,张旸,赵金宝,唐晖.台湾集集大地震及其余震的长周期地震动特性[J].地震学报,2006,28(4):417-428. |
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| 作者姓名： | 李春锋 张旸 赵金宝 唐晖 |
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| 作者单位： | 1） 中国北京100081中国地震局地球物理研究所2） 中国北京100098中航勘察设计研究院3） 中国哈尔滨150080中国地震局工程力学研究所 |
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| 基金项目： | 国家自然科学基金项目(50278090)资助. |
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| 摘 要： | 用丰富的高质量数字强震记录对台湾集集大地震及余震的长周期地震动特性进行了研究. 本文主要研究了长周期地震动的强度随震级、距离及场地条件的变化情况；同时对近断层的长周期地震动特性进行了分析. 结果表明，集集大地震及余震的长周期地震动反应谱的形状主要受场地条件和震级控制（D+E类场地的反应谱要比B+C类的宽，震级大的反应谱要比震级小的宽），而受距离影响并不显著；近断层长周期地震动明显受断层活动特性影响:上盘的长周期地震动比下盘的强，北部的比南部的强.
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| 关 键 词： | 集集地震 长周期地震动 反应谱 车笼埔断层 |
| 文章编号： | 0253-3782(2006)04-0417-12 |
| 修稿时间： | 2005年9月28日 |
LONG-PERIOD GROUND MOTION CHARACTERISTICS OF THE 1999 JIJI(Chi-Chi) ,TAIWAN, MAINSHOCK AND AFTERSHOCKS |
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| Li Chunfeng,Zhang Yang,Zhao Jinbao,Tang Hui.LONG-PERIOD GROUND MOTION CHARACTERISTICS OF THE 1999 JIJI(Chi-Chi) ,TAIWAN, MAINSHOCK AND AFTERSHOCKS[J].Acta Seismologica Sinica,2006,28(4):417-428. |
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| Authors: | Li Chunfeng Zhang Yang Zhao Jinbao Tang Hui |
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| Abstract: | This paper investigates long-period ground motion characteristics of the 1999 Jiji(Chi-Chi), Taiwan, mainshock and aftershocks on the basis of a lot of the high quality digital strong motion records. The study attaches the importance to the variation of strength of the long-period motion with magnitude, distance, and site condition. In the meantime, the near-fault long-period ground motion characteristics are analyzed. The result shows that the shape of the long-period response spectrum is mainly controlled by site condition and magnitude (the spectrum of class D+E is wider than that of class B+C, and the spectrum of larger magnitude is wider than that of smaller magnitude), and the effect of fault distance on the shape is not evident. And the near-fault long-period ground motion characteristic depends on fault activity apparently, that is to say, the long-term ground motion in the hanger is stronger than that in the footwall, and the long-term ground motion in the north is stronger than that in the south. |
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| Keywords: | Jiji(Chi-Chi) earthquake long-period ground motion response spectrum Chelongpu(Chelungpu) fault |
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