B. Chevalier, G. Combe, P. Villard
Laboratoire Sols, Solides, Structures – Risques, Grenoble, France
Keywords: granular matter, arching, Distinct Element Method
ABSTRACT:
Experimental and numerical tests of the trap-door problem have been carried out, involving severalgranular materials. Three phases have been observed in the load transfer mechanism, as the trap-door is moved
downward. The classical pattern for the description of this type of problem (a vertical plane of failure at each edge of the trap-door) corresponds to the third phase observed. The previous phases correspond to the maximal load transfer and then to the expansion of the granular material from the bottom to the top of the granular layer. Discrete numerical modelling has been processed to investigate the effects of the particles size and of the shear strength parameters on the mechanisms observed. The respective role of peak and residual friction angles has been identified.
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