A Simple Single Bounding Surface Model of Undrained Saturated Clays

A simple single bounding surface constitutive model is developed to predict the undrained behaviors of saturated clays under cyclic loads. The new model does not involve complex kinematic hardening rules, and it is only required to memorize important stress reverse events; therefore, the simplicity should be the largest advantage of the model. A new interpolation function of an elastoplastic shear modulus is proposed based on bounding surface theories.