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    地震作用下软硬互层顺层岩质边坡动力响应研究

    李师毓 吴琼 王亮清 罗红明 秦越 刘智琪

    李师毓, 吴琼, 王亮清, 罗红明, 秦越, 刘智琪, 2023. 地震作用下软硬互层顺层岩质边坡动力响应研究. 地球科学. doi: 10.3799/dqkx.2023.002
    引用本文: 李师毓, 吴琼, 王亮清, 罗红明, 秦越, 刘智琪, 2023. 地震作用下软硬互层顺层岩质边坡动力响应研究. 地球科学. doi: 10.3799/dqkx.2023.002
    Shiyu Li, Qiong Wu, Liangqing Wang, Hongming Luo, Yue Qin, Zhiqi Liu, 2023. Study of Dynamic Response of Soft and Hard Interbedded Rock Slopes Under Earthquakes. Earth Science. doi: 10.3799/dqkx.2023.002
    Citation: Shiyu Li, Qiong Wu, Liangqing Wang, Hongming Luo, Yue Qin, Zhiqi Liu, 2023. Study of Dynamic Response of Soft and Hard Interbedded Rock Slopes Under Earthquakes. Earth Science. doi: 10.3799/dqkx.2023.002

    地震作用下软硬互层顺层岩质边坡动力响应研究

    doi: 10.3799/dqkx.2023.002
    基金项目: 

    国家重点研发计划项目(2019YFC1509705);国家重点研发计划项目(2022YFC3080200);国家自然科学基金面上项目(No.41877259)

    详细信息
      作者简介:

      李师毓(1998-),男,硕士研究生,主要从事地质灾害与岩土工程方面的研究,E-mail:269952725@qq.com,ORCID:0000-0003-2612-344X,Tel:15827553306

      通讯作者:

      吴琼(1985-),女,教授,博士,博士生导师,主要从事岩体结构和岩体力学参数研究,E-mail:wuqiong@cug.edu.cn,ORCID:0000-0001-5029-5925,Tel:15392942198

    • 中图分类号: P642

    Study of Dynamic Response of Soft and Hard Interbedded Rock Slopes Under Earthquakes

    • 摘要: (目的)软硬互层顺层岩质边坡在我国强震区广泛存在,地震极易诱发该类边坡产生地质灾害。(方法)本文针对地震作用下软硬互层顺层岩质边坡动力响应关键科学问题开展研究,基于离散元数值模拟法,揭示了软硬互层顺层岩质边坡动力响应规律,分析了不同边坡特征因素对其动力响应的影响。(结果和结论)结果表明:地震作用下软硬互层边坡变形破坏主要受软硬岩间层面控制,坡表剪切口和软岩位移增量明显;地震波在传播过程中,软硬岩层对地震加速度具有放大作用,其中软岩的放大作用更明显;地震波频谱特征显示:当地震波从硬岩传播至软岩时,多个固定频段被显著放大,当从软岩传播至硬岩时,频谱有所降低;坡表位移和加速度放大系数随软岩和层面强度的增加而减小,随层厚比的增加而增大;软岩强度和层厚比会改变地震波中显著放大频段的位置,二者增大时,放大频段的数量不变,频率减小;岩层层面强度降低时,放大频段的数量和频率不变,放大程度增大。

       

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    • 收稿日期:  2022-10-20
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