Effects of tensile and bending rigidities of reinforcement in reinforcing soil structures and ground

摘要

A nonlinear elasto-plastic FEM analysis was conducted to simulate a series of plane strain laboratory model tests on the bearing capacity of reinforced soil. The model ground was made of dense Toy-oura sand and reinforced with linear, tensile reinforcing members placed horizontally beneath a strip footing. The FEM model for sand considered pressure-dependency and anisotropy in the internal friction angle, strain softening, dilatancy and shear banding. The FEM simulation agreed reasonably with the physical experiment with respect to the load-settlement relations and shear banding patterns. Effects of tensile and bending rigidities of reinforcement on the reinforcing mechanism for different reinforcing patterns were evaluated by examining the tensile force and bending moment mobilized in reinforcement and the strain fields of soil obtained from the FEM analysis.