Steel concrete bond model for the simulation of industrial structures
Résumé
This paper presents a new finite element approach to model the steel-concrete bond effects. This model proposes to relate steel, represented by truss elements, with the surrounding concrete in the case where the two meshes are not necessary coincident. The theoretical formulation is described and the model is applied on a 3D simulation of a reinforced concrete tie. A characteristic stress distribution is observed, related to the transfer of bond forces from steel to concrete. To better explain the steel-concrete bond effects on the mechanical behavior of the structure, the same simulation is performed using 1D model. The results are compared with a computation in which a perfect relation between steel and concrete is supposed. It clearly shows how the introduction of the bond effects can improve the description of the cracking process (crack spacing especially).