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

doi:10.3799/dqkx.2023.002

Volume 48 Issue 8

Aug. 2023

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Article Navigation > Earth Science > 2023 > 48(8): 3127-3136

Li Shiyu, Wu Qiong, Wang Liangqing, Luo Hongming, Qin Yue, Liu Zhiqi, 2023. Study of Dynamic Response of Soft and Hard Interbedded Rock Slopes under Earthquakes. Earth Science, 48(8): 3127-3136. doi: 10.3799/dqkx.2023.002

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Li Shiyu, Wu Qiong, Wang Liangqing, Luo Hongming, Qin Yue, Liu Zhiqi, 2023. Study of Dynamic Response of Soft and Hard Interbedded Rock Slopes under Earthquakes. Earth Science, 48(8): 3127-3136. doi: 10.3799/dqkx.2023.002

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

doi: 10.3799/dqkx.2023.002

Li Shiyu^{1
,
,},
Wu Qiong^{1
,
,
,},
Wang Liangqing¹,
Luo Hongming²,
Qin Yue¹,
Liu Zhiqi¹

1.
Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
2.
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science, Wuhan 430071, China

Received Date: 2023-01-02
Publish Date: 2023-08-25

Abstract

Abstract

Soft and hard interbedded rock slopes are widely distributed in meizoseismal areas of China and geological disasters are prone to be induced on such slopes due to earthquakes. In this paper, the key scientific issues of the dynamic response of soft and hard interbedded rock slopes under earthquakes were studied. The discrete element numerical simulation method was used to reveal the dynamic response of soft and hard interbedded rock slopes and influences of different slope factors on the dynamic response. The results show that bedding planes between soft and hard rocks play a main control role in the deformation and failure of the slope. Displacements obviously increase on the shear outlets and soft rock of the slope surface. Accelerations of seismic waves are amplified by soft and hard strata during the propagation of seismic wave and soft rocks have a significant amplification effect on the accelerations. The seismic wave spectra show that multiple fixed frequency bands are obviously amplified when the seismic wave propagates from hard rocks to soft rocks; the spectra decrease when the seismic wave propagates from soft rocks to hard rocks. The displacements and the amplification coefficients of acceleration decrease with the increase of the strength of soft rocks and bedding planes, while increase with the increase of thickness ratio. The locations of obviously amplified frequency bands are influenced by the strength of soft rocks and bedding planes. When the strength of soft rocks and bedding planes increase, the number of amplified bands remains the same and frequencies decrease. The reduction of the strength of bedding planes will not change the number and frequency of the amplified bands, but increase the degree of amplification.
- soft and hard interbedded rock slope,
- earthquake,
- dynamic response,
- numerical simulation,
- discrete element

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References(41)

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

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