ABSTRACT
A series of undrained cyclic triaxial tests were performed on artificial samples prepared by mixing Toyoura sand and bentonite at a ratio of 95% and 5% in dry weight and on undisturbed Holocene sand samples with a fines content of 6% retrieved by in-situ freezing. Their elastic deformation properties were measured by applying very small amplitude cyclic axial loads. The results could be explained by considering inherent and stress state-induced anisotropy in modeling of elastic deformation characteristics and by correcting for the effects of membrane penetration. Gradual degradation in the elastic Young’s modulus was observed during liquefaction when compared to that measured during isotropic consolidation. It was also shown that longer consolidation time or higher temperature during consolidation resulted in increase in the liquefaction resistance of the artificial samples, while only limited effects of these conditions on the elastic deformation properties were observed within the range of the tested conditions.
