A State Parameter Based Generalized Plasticity Model for Unsaturated Soils

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 d...

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Bibliographic Details
Published in:Computer modeling in engineering & sciences 2010-01, Vol.55 (3), p.293-317
Main Authors: Manzanal, D, Pastor, M, Fern, J A, Merodo, Ez, Mira, P
Format: Article
Language:English
Subjects:
Mathematical models
Mechanical properties
Parameters
Plastic properties
Soil suction
Unsaturated soils
Online Access:Get full text
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Summary: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.
ISSN:1526-1492
1526-1506
DOI:10.3970/cmes.2010.055.293