基于DEM-FDM耦合的顺层岩质边坡强震动力响应及破坏模式分析

刘毛毛; 石振明; 李博; 夏成志

doi:10.3799/dqkx.2023.062

Volume 49 Issue 8

Aug. 2024

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Liu Maomao, Shi Zhenming, Li Bo, Xia Chengzhi, 2024. Analysis of Dynamic Response and Failure Mode of Bedding Rock Slopes Subject to Strong Earthquakes Based on DEM-FDM Coupling. Earth Science, 49(8): 2799-2812. doi: 10.3799/dqkx.2023.062

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Liu Maomao, Shi Zhenming, Li Bo, Xia Chengzhi, 2024. Analysis of Dynamic Response and Failure Mode of Bedding Rock Slopes Subject to Strong Earthquakes Based on DEM-FDM Coupling. Earth Science, 49(8): 2799-2812. doi: 10.3799/dqkx.2023.062

Citation:

Liu Maomao, Shi Zhenming, Li Bo, Xia Chengzhi, 2024. Analysis of Dynamic Response and Failure Mode of Bedding Rock Slopes Subject to Strong Earthquakes Based on DEM-FDM Coupling. Earth Science, 49(8): 2799-2812. doi: 10.3799/dqkx.2023.062

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Analysis of Dynamic Response and Failure Mode of Bedding Rock Slopes Subject to Strong Earthquakes Based on DEM-FDM Coupling

doi: 10.3799/dqkx.2023.062

College of Civil Engineering, Tongji University, Shanghai 200092, China

Received Date: 2023-02-13
Available Online: 2024-08-27
Publish Date: 2024-08-25

Abstract

Abstract

Based on the DEM-FDM coupling method, considering the three-dimensional extension of the structural plane and two directions of seismic wave, a numerical model of bedding rock slope with different structures is established in different areas, focusing on the dynamic response and deformation failure mechanism of bedding rock slope with different structures under strong earthquake. The following conclusions are drawn: (1) Under earthquake, there is a certain elevation amplification effect of slope acceleration, The horizontal amplification effect at the bottom of the slope is stronger than the vertical amplification effect, and the top amplification effect is equal. (2) Within the elevation range of 32.5-42.5 m, the existence of structural planes such as bedding planes and joints has a certain blocking effect on the propagation of seismic waves. The amplification effect of the slope shoulder is stronger than that of other parts, and the more developed the joints are, the stronger the amplification effect of the slope shoulder is. Compared with the joints whose dip-direction is 180°, the joints whose dip-direction is 90° have greater influence on the amplification effect. (3) The four models with different rock mass structures show different deformation and failure characteristics, including stability, local cracking, slip tension failure and slip collapse failure, respectively. Joints inclined to 90 ° are the main structural plane controlling the stability of bedding slope. Compared with the previous researches, the coupling method can better reveal thedynamicresponseand failure mode of bedding rock slopewith orthogonal secondary joints, and provide a certain reference for slope engineering in strong earthquake areas.
- DEM-FDM coupling,
- bedding rock slope,
- dynamic response,
- failure mechanism,
- engineering geology

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References(53)

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Analysis of Dynamic Response and Failure Mode of Bedding Rock Slopes Subject to Strong Earthquakes Based on DEM-FDM Coupling

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