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青海门源MS6.9地震强地面运动精细化模拟

张海 高俊焱 王岱 刘中宪 李程程 张聪

张海,高俊焱,王岱,刘中宪,李程程,张聪,2023. 青海门源MS6.9地震强地面运动精细化模拟. 震灾防御技术,18(3):462−470. doi:10.11899/zzfy20230304. doi: 10.11899/zzfy20230304
引用本文: 张海,高俊焱,王岱,刘中宪,李程程,张聪,2023. 青海门源MS6.9地震强地面运动精细化模拟. 震灾防御技术,18(3):462−470. doi:10.11899/zzfy20230304. doi: 10.11899/zzfy20230304
Zhang Hai, Gao Junyan, Wang Dai, Liu Zhongxian, Li Chengcheng, Zhang Cong. Fine Simulation of Strong Ground Motion by MS6.9 Menyuan Earthquake, Qinghai[J]. Technology for Earthquake Disaster Prevention, 2023, 18(3): 462-470. doi: 10.11899/zzfy20230304
Citation: Zhang Hai, Gao Junyan, Wang Dai, Liu Zhongxian, Li Chengcheng, Zhang Cong. Fine Simulation of Strong Ground Motion by MS6.9 Menyuan Earthquake, Qinghai[J]. Technology for Earthquake Disaster Prevention, 2023, 18(3): 462-470. doi: 10.11899/zzfy20230304

青海门源MS6.9地震强地面运动精细化模拟

doi: 10.11899/zzfy20230304
基金项目: 天津市科技支撑计划项目(19YFZCSN01180);国家自然科学基金(51908401、52008287);天津市科技计划项目(22KPXMRC00150)
详细信息
    作者简介:

    张海,男,生于1977年。教授。主要从事城市防震减灾研究。Email:zhanghai@tcu.edu.cn

    通讯作者:

    王岱,男,生于1981年。讲师。主要从事工程抗震研究。Email:wgd@tcu.edu.cn

  • 12 http://speed.mox.polimi.it/download/
  • 23 https://mp.weixin.qq.com/s/IGp1dw7KfFY3PiwWT2WY6A

Fine Simulation of Strong Ground Motion by MS6.9 Menyuan Earthquake, Qinghai

  • 摘要: 2022年1月8日青海门源MS6.9地震是该地区有记录以来的第3次强震,未来仍有再次发生强震的可能。基于门源地区的地表高程、速度介质参数以及门源地震断层滑移分布等地形地质特征,采用谱元法精细化模拟青海门源地震的地震波传播过程,重点考察复杂起伏地形区域强地面运动的空间分布特征。结果表明,PGV较大的地方主要集中在断层附近,最大值为53.1 cm/s,且沿断层走向地震响应明显大于垂直断层走向,具有明显的地震方向性效应;地震波在断层两侧出现反应较为剧烈的波前,波场快照PGV可达47.2 cm/s,与实测烈度相近,且模拟给出的烈度分布特征与实测烈度分布规律相同;山体分布密集区域的PGV响应较为剧烈,山体附近的地震动持续时间也较长,而平坦区域的地震响应相对较弱;通过与强震记录对比,验证了本文方法的合理性与准确性。研究成果可为地形复杂山体区域地震预测及防震减灾提供一定的参考。
    1)  12 http://speed.mox.polimi.it/download/
    2)  23 https://mp.weixin.qq.com/s/IGp1dw7KfFY3PiwWT2WY6A
  • 图  1  MS6.9门源地震发震构造及历史地震活动

    Figure  1.  Seismogenic structure and historical seismicity around the MS6.9 Menyuan earthquake

    图  2  研究区域

    Figure  2.  Study region

    图  3  模型参数

    Figure  3.  Model parameters

    图  4  模型网格划分

    Figure  4.  Model grid division

    图  5  波场快照

    Figure  5.  Wavefield snapshot

    图  6  PGV云图

    Figure  6.  PGV nephogram

    图  7  模拟结果与实测烈度对比

    Figure  7.  Comparison between the simulated result and the measured intensity

    图  8  模拟结果与台站记录对比

    Figure  8.  Comparison between the simulated results and the station records

    表  1  地层介质参数

    Table  1.   Stratum media parameters

    地层序号层底深度/kmρ/(kg·m−3)Vs/(m·s−1)Vp/(m·s−1)${Q_{\text{s}}}$${Q_{\text{p}}}$
    15211036406076364608
    210272036096049361605
    315279036096040361604
    420279036606150366615
    530279036836176368618
    640279037666199376620
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-03-03
  • 刊出日期:  2023-08-31

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