| 地表破裂断层近场速度大脉冲研究 |
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| 引用本文： | 姜慧,黄剑涛,俞言祥,温增平.地表破裂断层近场速度大脉冲研究[J].华南地震,2009,29(2):1-9. |
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| 作者姓名： | 姜慧 黄剑涛 俞言祥 温增平 |
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| 作者单位： | 1. 广东省地震局,广东,广州,510070
2. 中国地震局地球物理研究所,北京,100081 |
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| 基金项目： | 科技支撑计划课题，国家重点基础研究发展规划(973计划) |
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| 摘 要： | 在分析和研究近场强震记录的基础上，对地面运动速度大脉冲进行了数值模拟。研究结果表明：有速度大脉冲的地面运动主要产生在断层周围。是地震发生时断层两盘突然错动在周围场地产生的特殊运动效应，单耳速度大脉冲常伴随有较大的地面永久位移，双耳或多耳速度脉冲常对应于位移大脉冲及可恢复位移，其产生机理与断层的破裂速度关系不大，与断层两盘的位移量有直接关系。速度大脉冲对近断层的长周期结构作用显著，值得研究。
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| 关 键 词： | 近断层 速度大脉冲 产生机理 |
Study on Large Velocity Pulses near Surface Rupture Faults |
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| JIANG Hui,HUANG Jiantao,YU Yanxiang,WEN Zengping.Study on Large Velocity Pulses near Surface Rupture Faults[J].South China Journal of Seismology,2009,29(2):1-9. |
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| Authors: | JIANG Hui HUANG Jiantao YU Yanxiang WEN Zengping |
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| Institution: | 1.Earthquake Administration of Guangdong Province.Guangzhou 510070;China;2.Institute of Geophysics;China Earthquake Administration;Beijing 100081;China |
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| Abstract: | On the basis of analyzing and studying near-fault records of strong earthquakes,the large velocity pulses of near-fault ground motions are numerically simulated.The results show that the large velocity pulse is a kind of special ground motion around faults caused by abrupt fault dislocations.The one-ear large velocity pulse is normally accompanied with a permanent ground displacement,whereas the two-ear large velocity pulse always goes with a large displacement pulse with retrievable displacement.The geneti... |
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| Keywords: | Near fault Large velocity pulse Genetic mechanism |
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