Monotonic and Cyclic Analysis of Granular Soils

摘要

A simple yet rigorous bounding surface plasticity model is developed to describe the stress-strain behaviour of variably saturated granular soils subjected to monotonic and cyclic loading. The model is formulated incrementally within the critical state framework using the effective stress approach. Both plastic volumetric strain and matric suction are introduced as hardening parameters. Cyclic behaviour is captured through a radial mapping rule in which the point of stress reversal is taken as the centre of projection. The effect of particle crushing at high stresses is considered through a three-segmented critical state and isotropic compression lines. A non-associative flow rule is employed to generalise application of the model to all soil types. The model is validated using experimental data from the literature.