Numerical Simulation of Bearing Capacity Failure in Reinforced Sand Ground and Slope

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A nonlinear elasto-plastic FEM analysis considering pressure-dependency and anisotropy in internal friction angle, strain softening, and shear banding was conducted to simulate a series of plane strain laboratory model tests on bearing capacity failure in reinforced sand level ground and slope. The model ground was made of air-dried dense Toyoura sand and reinforced with linear, tensile reinforcing members placed horizontally beneath a strip footing. Model tests on reinforced ground with various reinforcing patterns using different length, number of layers, and vertical spacing of reinforcement as well as the one on unreinforced ground were analyzed. Load-settlement relations obtained by the FEM analyses were similar to those of experimental tests with respect to the effects of reinforcing patterns, although pre-peak stiffness and peak load obtained by the FEM analyses were slightly larger. It was also found that shear banding patterns observed in the tests were well simulated by the FEM analyses.
国際ジオシンセティックス学会日本支部の論文