In the numerical analyses of boundary value problems of geotechnical engineering it is often necessary to obtain realistic and accurate displacement fields. To this aim, constitutive models which reproduce accurately stress-strain behaviour of soils should be adopted. Severn-Trent (Gajo & Muir Wood, 1999a) is an advanced constitutive model for granular materials based on bounding surface and kinematic hardening plasticity. It is able to reproduce the main features of the mechanical behaviour of sands using a relatively simple mathematical formulation. In this paper, the capability of Severn-Trent model in reproducing the experimental data obtained in compression triaxial tests on Toyoura sand samples is presented and discussed. In order to obtain satisfactory model predictions also in undrained extension triaxial tests, the model was modified introducing two additional constitutive parameters which account for the inherent fabric anisotropy of the material. © 2010 Taylor & Francis Group, London.

Simulation of mechanical behaviour of Toyoura sand using Severn Trent constitutive model / Miliziano, Salvatore; Rotisciani, GIADA MARIA; F., Soccodato. - (2010), pp. 107-112. (Intervento presentato al convegno 7th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2010 tenutosi a Trondheim; Norway nel 2 - 4 June, 2010).

Simulation of mechanical behaviour of Toyoura sand using Severn Trent constitutive model

MILIZIANO, Salvatore;ROTISCIANI, GIADA MARIA;
2010

Abstract

In the numerical analyses of boundary value problems of geotechnical engineering it is often necessary to obtain realistic and accurate displacement fields. To this aim, constitutive models which reproduce accurately stress-strain behaviour of soils should be adopted. Severn-Trent (Gajo & Muir Wood, 1999a) is an advanced constitutive model for granular materials based on bounding surface and kinematic hardening plasticity. It is able to reproduce the main features of the mechanical behaviour of sands using a relatively simple mathematical formulation. In this paper, the capability of Severn-Trent model in reproducing the experimental data obtained in compression triaxial tests on Toyoura sand samples is presented and discussed. In order to obtain satisfactory model predictions also in undrained extension triaxial tests, the model was modified introducing two additional constitutive parameters which account for the inherent fabric anisotropy of the material. © 2010 Taylor & Francis Group, London.
2010
7th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2010
Bounding surfaces; Constitutive parameters; Displacement field
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Simulation of mechanical behaviour of Toyoura sand using Severn Trent constitutive model / Miliziano, Salvatore; Rotisciani, GIADA MARIA; F., Soccodato. - (2010), pp. 107-112. (Intervento presentato al convegno 7th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2010 tenutosi a Trondheim; Norway nel 2 - 4 June, 2010).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/360114
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