1. New constitutive model "H1" for the accurate modelling of excavations.
This constitutive model was developed by Dr. El Arji as part of her thesis work at IFSTTAR – Université Gustave Eiffel, in order to improve the estimation of vertical displacements behind a retaining structure such as a wall. In the formulation, particular attention is paid to the volume plastic deformation: the plastic part of the model is characterized by a flow rule and a specific hardening law. On the other hand, the elastic part of the model remains as simple as possible.
The key feature of the model is the flow rule, which does not refer to a plastic potential, and allows first to describe a contracting behaviour and then a dilating behaviour.
Contribution à la modélisation numérique des excavations profondes (thèse de Mme Hiba El Arja)