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Dynamic process analysis of large-scale landslides triggered by the Wenchuan earthquake via the discrete element method

Author

Listed:
  • Xiangrui Huang

    (Sichuan Agricultural University
    Sichuan Agricultural University)

  • Danqing Song

    (South China University of Technology
    South China University of Technology)

  • Zhuo Chen

    (Sichuan Agricultural University
    Sichuan Agricultural University)

  • Dakai Xu

    (Sichuan Agricultural University
    Sichuan Agricultural University)

  • Liang Wang

    (Sichuan Agricultural University
    Sichuan Agricultural University)

Abstract

This study utilized the discrete element method to simulate the dynamic processes of earthquake-induced landslides, aiming to explore the instability mechanisms, energy transformation, and movement characteristics of such landslides. By constructing a two-dimensional landslide model, typical landslides triggered by the Wenchuan earthquake were simulated, leading to the following key conclusions: (1) The landslide instability process can be divided into three consecutive stages: disintegration of slope materials (bond breakage), initiation and propagation of the slip surface from top to bottom, and coherent downslope movement of slope materials, followed by reorganization into a stable postfailure state. (2) Energy transformation and dissipation are critical factors in landslide dynamics, with frictional heat being the primary source of energy dissipation during the landslide process. (3) The evolution of kinetic energy over time shows initial stability, a gradual increase as the sliding mass moves downwards, and an eventual reduction to zero as the landslide ceases. The increase in heat corresponds to a decrease in kinetic energy, reflecting the mechanisms of energy transformation and dissipation during the landslide process. The results of this study demonstrate that the discrete element method has significant advantages in simulating complex geological phenomena, providing important insights for landslide prediction and disaster mitigation in earthquake-prone areas.

Suggested Citation

  • Xiangrui Huang & Danqing Song & Zhuo Chen & Dakai Xu & Liang Wang, 2025. "Dynamic process analysis of large-scale landslides triggered by the Wenchuan earthquake via the discrete element method," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 121(6), pages 7683-7706, April.
    • Handle: RePEc:spr:nathaz:v:121:y:2025:i:6:d:10.1007_s11069-025-07114-5
    DOI: 10.1007/s11069-025-07114-5
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    References listed on IDEAS

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    1. Zhuo Chen & Danqing Song, 2021. "Numerical investigation of the recent Chenhecun landslide (Gansu, China) using the discrete element method," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 105(1), pages 717-733, January.
    2. repec:plo:pone00:0004964 is not listed on IDEAS
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