Abstract
The monotonic and cyclic triaxial tests were performed on reclaimed sands sampled from Kobe Rokko Island. The effect of both confining pressure and relative density on the shear property of the soil has been considered. The research presented here was performed in order to understand the effect of soil compressibility and crushability on the monotonic and cyclic undrained shear behavior of soil. In addition, the cyclic triaxial tests on anisotropically consolidated samples were carried out for various combinations of initial static and cyclic shear stresses which are those expected on soil elements subjected to cyclic loading in the vicinity of quay walls which were damaged by earthquake. The cyclic shear strength tended to decrease with increasing initial shear stress. It was the opposite tendency from that for Toyoura sand. The quay wall based on the decomposed granite soil as a replaced sand was analyzed by a seismic circular arc method. The cyclic strength obtained by the tests were introduced into the analysis. The analytical result reasonably agrees with the actual damage case history.
