EFFECTS OF INITIAL IMPERFECTION ON THE RIEDEL SHEAR BANDS IN SURFACE GROUND DUE TO STRIKE-SLIP FAULT

Abstract

A slip on the strike-slip fault causes flower structures and Riedel shear band within the overlying cover. This paper simulates the formation of these structures, employing the dynamic elasto-plastic finite deformation analysis code GEOASIA^®.
The main conclusions are as follows: (1) A set of Riedel shear structures accompanies the plastic expansion of the material, (2) A pattern of the initial material imperfections dominantly influence the formation process of Riedel shear structures and (3) Riedel shear bands don't appear in larger models, whose bottoms have more lightly overconsolidated by higher overburden pressure.