Generalized plasticity state parameter‐based model for saturated and unsaturated soils. Part II: Unsaturated soil modeling |
| |
| Authors: | Diego Manzanal Manuel Pastor José Antonio Fernández Merodo |
| |
| Affiliation: | 1. M2i (Mathematics Modelling Engineering) Group, Department of Applied Mathematics, ETS de Ingenieros de Caminos, UPM, Spain;2. Laboratorio de Geotecnia, Centro de Estudios y Experimentación de Obras Públicas (CEDEX), Madrid, Spain;3. área de Investigación en Peligrosidad y Riesgos Geológicos, IGME, Madrid, Spain |
| |
| Abstract: | The aim of this paper is to extend the generalized plasticity state parameter‐based model presented in part 1 to reproduce the hydro‐mechanical behavior of unsaturated soils. The proposed model is based on two pairs of stress–strain variables and a suitable hardening law taking into account the bonding—debonding effect of suction and degree of saturation. A generalized state parameter for unsaturated state is proposed to reproduce soil behavior using a single set of material parameters. Generalized plasticity gives a suitable framework to reproduce not only monotonic stress path but also cyclic behavior. The hydraulic hysteresis during a drying—wetting cycle and the void ratio effect on the hydraulic behavior is introduced. Comparison between model simulations and a series of experimental data available, both cohesive and granular, are given to illustrate the accuracy of the enhanced generalized plasticity equation. Copyright © 2010 John Wiley & Sons, Ltd. |
| |
| Keywords: | constitutive modeling state parameter generalized plasticity unsaturated soils granular and cohesive materials |
|
|
