Open Access

ARTICLE

A State Parameter Based Generalized Plasticity Model for Unsaturated Soils

D. Manzanal^1,2, M. Pastor^2,3, J.A. Fern,ez Merodo⁴, P. Mira^2,3

1 ETS de Ingenieros de Caminos, UPM , Madrid, Spain
2 Facultad de Ingeniería, UNPSJB, Comod. Rivadavia, Argentine
3 Laboratorio de Geotecnia, CEDEX, Madrid, Spain
4 Area de Investigación en Peligrosidad y Riesgos Geológicos, IGME, Madrid, Spain

Computer Modeling in Engineering & Sciences 2010, 55(3), 293-318. https://doi.org/10.3970/cmes.2010.055.293

Abstract

This paper presents an extension of the Generalized Plasticity model proposed by Pastor - Zienkiewicz in 1986. The extension is based on (i) incorporating a state dependant parameter to model the mechanical behaviour of sand under a wide range of relative densities and confining pressures (ii) the definition of the effective stress of Schrefler (1984) modified to obtain unique CSL for different suction and (iii) the work conjugated variable proposed by Houlsby (1997). Several examples are presented for saturated and unsaturated soils.

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Keywords

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