2024 Volume 80 Issue 13 Article ID: 23-13122
In this study, we performed a reproduction analysis of a centrifugal model experiment of an RC shaft buried in dense sandy ground (upper unsaturated layer, lower saturated layer) using effective stress analysis of the soil-structure interaction system. The two-dimensional effective stress analysis shows that by subjecting the ground to drainage conditions, it is possible to reproduce the softening behavior of the ground due to an increase in excess pore water pressure in a manner consistent with the experimental results. In the structure interaction analysis, we confirmed that the damage to the RC shaft and the maximum response displacement of the ground and structure could be evaluated generally well. In addition, due to the softening caused by the rise in excess pore water pressure in the lower saturated layer, the upper unsaturated layer, which maintains the rigidity of the ground, deforms together with the lower saturated layer, causing shear deformation in the RC shaft near the boundary.
