SPH-FEM Coupled Simulation for Stability of Ground Anchor

Abstract

In this study, with the aim of establishing a method to estimate the effect of deterioration of ground anchor on the tensile force, numerical studies of the relationship between ground anchor deterioration, the tensile force, and anchor deformation. We created a computational model that can reproduce the reduction of the withstanding ground strength with full wall thinning. The soil was modeled with SPH particles with a diameter of 30 mm. The anchor was a FEM model with shell elements, and the thickness were 3.2 mm, 1.6 mm , and 1.0 mm. The tensile force of the anchor was calculated from the resultant contact force of the FEM anchor surface and the SPH soil particles. The yield strength of the soil decreased with the reduction of the thickness of the anchor. It was suggested that this is due to an increase in plastic deformation of the anchor due to thinning.