ABSTRACT
The aim of this chapter is to present a cyclic elastoplastic constitutive model for sand and its application to an effective-stress-based fully coupled liquefaction analysis. The model is a cyclic elastoplastic model for sand based on the nonlinear kinematical hardening theory considering the strain dependency of the plastic modulus (Oka et al. 1999). The model has already been applied to liquefaction analyses, in particular, after the 1995 Hyogoken Nambu earthquake in Japan. First, an outline of the model for sand is described. Second, a possible modi‰cation for the strain dependency of the plastic modulus is presented. Finally, the numerical application of the model to a liquefaction analysis of a ground and a ground-structure system is shown.
