Fundamental study on permanent deformation analysis of granular base course material using elasto-plastic model

摘要

One of the authors had revised the modified Cam-Clay model using the extended SMP criterion and a hardening parameter, and shown that the static tri-axial compression test of the subgrade material, base course material and the open grade asphalt mixture can be simulate by that model. In this study, the further revised Cam-Clay model, which took in the rotational hardening concept proposed by Hashiguchi, was developed. And the simulation of the cyclic loading tri-axial compression test of a granular base course material was carried out. As the result, it was found that this model could be simulated the increase of the plastic strain with cyclic loading. Consequently, it seems that the elasto-plastic model developed in this study is effective for the permanent deformation analysis of the granular base course materials.