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Dynamic Response and Failure Mode of Slopes with Horizontal Soft and Hard Interbeddings Under Frequent Microseisms

  • Research Article - Civil Engineering
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Abstract

Slopes with soft and hard interbedded strata are widely distributed in the Three Gorges Reservoir area of China. The repeated frequent microseisms induced by the Three Gorges Reservoir may cause dynamic fatigue instability because of damage accumulation. The dynamic response and deformation process of slopes with horizontal soft and hard interbeddings under frequent microseisms are analyzed in this study by shaking table test. Horizontal seismic loading is loaded nearly 2000 times to simulate frequent earthquake actions, and the loading scheme is divided into five stages. Results show that a strong earthquake leads to a fast slope damage and a high damage degree. The amplification coefficients of peak ground acceleration at different stages exhibit decreasing trends, which imply that damage accumulates continuously with the increase in loading times. Two slide surfaces can be observed in the failure process of the model slope during the instability evolution process. Slide surface 1 is formed along the slope back end and presents a failure mode of sliding–fracturing. Slide surface 2 is formed along the slope surface and demonstrates creep pressure-induced fracturing. The slope finally loses its stability along slide surface 2. The research results are significant to the understanding of the formation mechanism of reservoir landslides and the prevention of disasters.

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Authors and Affiliations

  1. School of Civil Engineering, Chongqing University, Chongqing, 400045, China

    **nrong Liu, Chunmei He, Shulin Liu & Yongquan Liu

  2. Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing, 400045, China

    **nrong Liu, Chunmei He, Shulin Liu & Yongquan Liu

  3. CMCU Engineering Co., Ltd, Chongqing, 400045, China

    Yuming Lu

  4. The Second Institute, Geological Mineral Exploration of Gansu Provincial Bureau of Geology and Mineral Resources, Lanzhou, 730020, Gansu, China

    Zhenhua Liu

Authors
  1. **nrong Liu
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  2. Chunmei He
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  3. Shulin Liu
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  4. Yongquan Liu
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  5. Yuming Lu
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  6. Zhenhua Liu
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Correspondence to Chunmei He.

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Liu, X., He, C., Liu, S. et al. Dynamic Response and Failure Mode of Slopes with Horizontal Soft and Hard Interbeddings Under Frequent Microseisms. Arab J Sci Eng 43, 5397–5411 (2018). https://doi.org/10.1007/s13369-018-3143-0

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  • DOI: https://doi.org/10.1007/s13369-018-3143-0

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