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Modeling of Debris Flow Using Distinct Element Method
The main purpose of this study was to use the discrete element method-based program, Particle Flow Code (PFC2D), to study the mechanisms of particle movement (including contact forces, displacements, flow pattern, and the strength parameters between particles) of debris flow.The following simulated results based on the particles passing through the falling door tests and the inclined trough tests can be obtained:The particles start moving as the friction angle between particles equals 28-30 degrees as the trough slope is 22 degrees.The angle of repose is about 56-60 degrees for particles with friction angle of 28-30 degrees.The angle of repose is about 34-38 degrees if subtracting the trough slope.This angle of repose can be treated as the macro friction angle of the debris materials.The obtained results are similar to the friction angles, 34.7-36.2 degrees, tested by Su (1998) on valley deposits using direct shear test.It is found that slope angle is the major reason that controls the incident of debris flow, and then friction angle between particles, volume concentration of the mixture, and friction angle of a slope.The characteristics of the simulated debris flow from this study are very similar to the actual debris flow.
Modeling of Debris Flow Using Distinct Element Method
The main purpose of this study was to use the discrete element method-based program, Particle Flow Code (PFC2D), to study the mechanisms of particle movement (including contact forces, displacements, flow pattern, and the strength parameters between particles) of debris flow.The following simulated results based on the particles passing through the falling door tests and the inclined trough tests can be obtained:The particles start moving as the friction angle between particles equals 28-30 degrees as the trough slope is 22 degrees.The angle of repose is about 56-60 degrees for particles with friction angle of 28-30 degrees.The angle of repose is about 34-38 degrees if subtracting the trough slope.This angle of repose can be treated as the macro friction angle of the debris materials.The obtained results are similar to the friction angles, 34.7-36.2 degrees, tested by Su (1998) on valley deposits using direct shear test.It is found that slope angle is the major reason that controls the incident of debris flow, and then friction angle between particles, volume concentration of the mixture, and friction angle of a slope.The characteristics of the simulated debris flow from this study are very similar to the actual debris flow.
Modeling of Debris Flow Using Distinct Element Method
Hsu, Sung-Chi (author) / Jaing, Chich-Hong (author) / Chen, Ni- Chi (author)
Second International Conference on Geotechnical and Earthquake Engineering ; 2013 ; Chengdu, China
IACGE 2013 ; 713-720
2013-10-09
Conference paper
Electronic Resource
English
Modeling of Debris Flow Using Distinct Element Method
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