Modélisation par éléments finis de structures coques en béton armé

ABSTRACT Computation of constructive works needs complex structure analyses taking account of large displacements and including accurate material modeling. In this paper, a shell finite element family dedicated to reinforced concrete structures is presented. The numerical formulation is similar to the one of T1 element (in the case of 3 node triangle) described in [HUG 87]. The behavior of concrete couples elasticity and damage (La Borderie's model) and the reinforcement which is defined as layers at different heights, presents an elastic-plastic behavior with isotropic hardening. The way such a complex behavior is implemented in shell elements as well as the numerical algorithm used to solve the constitutive equations, including the calculation of the tangent stiffness, are detailed. Two applications validate the behavior of the proposed elements.