Study on dynamics of high-speed and long run-out landslide hazards based on block discrete element method
LIU Guangyu1，XU Wenjie1，TONG Bin2，WANG Lichao2
(1. State Key Laboratory of Hydroscience and Hydraulic Engineering，Tsinghua University，Beijing 100084，China；
2. China Institute of Geoenvironment Monitoring，Beijing 100081，China)
Abstract：The fracture and disaster-causing mechanism of high-speed and long run-out landslides is one difficulty of landslide disasters. In order to deeply study the dynamic process of landslides from continuum to discontinuum，a cohesive fracture model is proposed based on block discrete element method. High-performance parallel computing based on graphics processor unit(GPU) is achieved， and a coupling simulation platform called couping discrete element method platform(CoDEM) is developed. Taking Yigong landslide as an example，the whole process of higher body collapsing，old landslide body resurrecting，debris flowing at a high speed and dam forming is studied systematically. Comparison between the numerical results and in-situ survey data is performed.It is shown that the numerical results including accumulation boundary and material components are in good agreement with the actual situation of the landslide. According to the dynamics characteristics during the landslide at different stages，the landslide area can be divided into four parts such as the initiation zone，the buffer zone，the circulation zone and the braking zone.
刘广煜1，徐文杰1，佟 彬2，王立朝2. 基于块体离散元的高速远程滑坡灾害动力学研究[J]. 岩石力学与工程学报, 2019, 38(8): 1557-1566.
LIU Guangyu1，XU Wenjie1，TONG Bin2，WANG Lichao2. Study on dynamics of high-speed and long run-out landslide hazards based on block discrete element method. , 2019, 38(8): 1557-1566.
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2019, Vol. 38 
