Akira Asaoka

TL;DR: In this paper, the authors applied the soil-water coupled finite deformation analysis using the Cam-Clay constitutive model for the simulation of undrained triaxial compression test in order to investigate the behavior of clay near/at the critical state.

TL;DR: In this paper, a simple yet accurate procedure for the description of the spatial variability of the undrained shear strength S u of soft clays is presented. But the results of the applied analysis verify previous findings on the vertical variability of S u and demonstrates the applicability of the present procedure in the commonly encountered situations with limited data.

TL;DR: In this article, a new method of soil-water coupled finite deformation analysis of saturated soils that considers inertial forces is presented. But this method does not consider changes in the geometric shape of the soil to be taken into account and is limited to static or dynamic deformation.

TL;DR: In this article, the superloading yield surface concept applied to the original Cam-clay model is examined for the application to the one-dimensional consolidation problems of highly structured soils, and the proposed elasto-plastic constitutive model is taken to be the case for a structured soil, the one dimensional consolidation computation clarifies the following : (1) Delayed consolidation should occur even under one dimensional compression condition with a considerably low stress ratio when softening of the soil occurs with volume compression.

TL;DR: In this paper, a simplified procedure for analyzing the set-up problem is presented in two stages: the first stage is the soil-water coupled rigid plastic finite element method which is employed for solving undrained failure of clay due to pile driving, and the other, a linear elastic consolidation computation which accounts for the decrease of void ratio of the clay after pile driving.