Résumé
This paper deals with the interest of the use of internal variables to the description of two different processes which can induce damage in concrete structures. One is linked to microcracking due to severe loadings, such as triaxial combination of stresses, dynamic loadings, the other concerns mechanical effects at early age due to hydration. The applications presented show the interest of the concepts used to simulate the evolutions of damage inside a structure, the interactions between concrete and steel and the resulting global behavior.