A three-dimensional runout analysis model for rapid landslide motion accounting for the deformation of sliding body
Assessment of landslide hazard often requires a good knowledge of the landslide characteristics.To investigate the dynamic runout process of the landslide across 3D terrain, a three-dimensional model using spring-deformable-block model is proposed.On the assumption that the motion form of landslides is continuous and variable, the sliding body is divided into lots of columns.The model is based on a stability analysis of landslides and allows taking the deformation of sliding body into account.Considering the force and moment equilibrium of deformable columns and the principle of conservation of energy, a three-dimensional sliding body is simplified by a series of deformable blocks with different dimensions.According to the accumulation and the release of the deformation, the sliding body acceleration, velocity and displacement formulas are established.Correlating well with the discrete element method, the present results are satisfactory in describing the dynamic process of landslides and predicting the impact areas of the post-failure sliding body.Finally, the present model is applied to analyze the sliding time, the maximum velocity and displacement of the sliding body of Jiweishan landslide in Wulong, Chongqing Southern China.By comparing with existing numerical results, the model shows good agreement with the previous ones.
H.Q.Yang Y.F.Lan D.X.Yan
School of Civil Engineering, Chongqing University, Chongqing, China
国际会议
The 3rd ISRM Young Scholars Symposium on Rock Mechanics(第三届国际岩石力学青年学者论坛)
北京
英文
487-492
2014-11-08（万方平台首次上网日期，不代表论文的发表时间）