汶川地震触发的大型滑坡动态过程分析——基于离散元法的研究
论文题目
Dynamic process analysis of large-scale landslides triggered by the Wenchuan earthquake via the discrete element method
1.College of Civil Engineering, Sichuan Agricultural University, Dujiangyan 611830, Sichuan, China
2.Sichuan Higher Education Engineering Research Center for Disaster Prevention and Mitigation of Village Construction, Sichuan Agricultural University, Dujiangyan 611830, China
3.School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China
4.State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, Guangdong, China
研究内容
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.
Keywords: Wenchuan earthquake; Large-scale landslides; Dynamic process analysis; Two-dimensional discrete element; MatDEM
Fig.5 Deformation process of the Laoyingyan landslide.
Fig.7 Displacement changes (unit, m) of the landslide at different time instants.
Fig.8 Heat changes in the landslide at different time instants.
Fig.11 Failure process of the Wangjiayan landslide
了解详情
Huang, X., Song, D., Chen, Z. et al. Dynamic process analysis of large-scale landslides triggered by the Wenchuan earthquake via the discrete element method. Nat Hazards (2025). https://doi.org/10.1007/s11069-025-07114-5
