A PRACTICAL CONSTITUTIVE MODEL FOR SANDS

Alireza Azami, Thamer Yacoub, John Curran

In the proceedings of: GeoQuébec 2015: 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference

Session: Soil Mechanics II / Mécanique des sols II

ABSTRACT: This paper will focus on the behaviour of granular materials under monotonic loads and presents a constitutive model that is simple yet practical for engineering applications. The model is based on the well-known Mohr-Coulomb model with only one additional material parameter to make it as simple and practical as possible. The applicability of the model is demonstrated by simulations of triaxial tests, and various model tests, including strip foundation and tunnels with and without nearby surface load and also an excavation benchmark case study.

RÉSUMÉ: Ce document se concentre sur le comportement des matériaux granulaires sous des charges monotones et présente un modèle constitutif simple, mais pratique pour les applications d'ingénierie. Ce modèle est basé sur le critère bien connu de Mohr-Coulomb. Seule l™addition d™un paramètre de matériau est effectuée afin de le rendre aussi simple et pratique que possible. L™application de ce dernier est démontrée par des simulations de tests triaxiaux, ainsi que divers tests de modèles, incluant la bande de fondations et les tunnels avec et sans charge de surface à proximité, ainsi qu'une étude de cas concernant l™excavation de référence.

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