Modelling of fluidized geomaterials via viscoplasticity: application to fast land

D. MANZANAL; D. PASTOR; J.A. FERNANDEZ MERODO; P. MIRA

Ischia, Italia

Conferencia; COUPLED PROBLEMS 2009; 2009

Thematic Conferences of the European Community in Computational Methods in Applied Sciences (ECCOMAS)

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 for modelling 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.