A continuum method for granular collapse with μ(I)-rheology-based dynamic earth pressure coefficient  

作　　者：Jianbo Fei Yuxin Jie Hao Xiong Chengyu Hong 

机构地区：[1]Underground Polis Academy,Shenzhen University,Shenzhen 518060,China [2]Key Laboratory of Coastal Urban Resilient Infrastructures(MOE),Shenzhen University,Shenzhen 518060,China [3]College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China [4]State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Particuology》2021年第5期214-226,共13页颗粒学报（英文版）

基　　金：funded by the National Natural Science Foundation of China(Grant Nos.52008261 and 52090081);the Key Research and Development Program of China Railway(Grant No.K2019G033).

摘　　要：In this paper,a continuum model with dynamic earth pressure coefficient is established to describe the granular slump process by introducingμ(I)rheology.This rheology is adopted to quantify the normal stresses in our proposed model rather than shear stresses in classical models.The constitutive laws of different depth-averaged continuum approaches including the hydrodynamic,Savage–Hutter and proposed models are comparatively investigated in terms of the rheological effects on the spread of a granular column.The simulation results indicate that the proposed dynamic model captures some significant features during granular slump on inclined planes with different inclination angles(for example,the runout distance,runout time,and final profile).The proposed model can also reproduce the inner static sided axisymmetric region observed in tests when the granular column's initial aspect ratio(ratio of height to radii)is small.

关 键 词：Granular material SLUMP RHEOLOGY Continuum method 

分 类 号：TU45[建筑科学—岩土工程]