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Description de la fissuration des éléments en béton armé: Méthode des Eléments Finis Intégrés

Abstract : Failure mechanisms like cracking is not trivial to represent. Often it requires a fine description of the material inducing computational costs for a complete simulation of the building. Recently, the concept of displacement discontinuities embedded into a standard finite element has been proved to be efficient in modeling fracture of quasi-brittle materials. The enrichment is local at the element level and so it reduces calculation time. Hence, global system size remains unchanged and the structure of the element code too. Non-linear mechanisms are described by a traction/separation law at the discontinuity. The present paper aims at capturing crack openings in a natural way by using the E-FEM method. In this work, this method is coupled with an anisotropic damage model based on oriented cracks which can be tackled independently. This enriched constitutive model has been implemented in the finite element code Cast3M. Numerical simulations at the integration point level and on concrete and reinforced concrete structures show the performances of the model.
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  • HAL Id : cea-02509662, version 1

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E. Kishta, B. Richard, C. Giry, F. Ragueneau. Description de la fissuration des éléments en béton armé: Méthode des Eléments Finis Intégrés. AFPS 2015 - 9eme Colloque de l'Association Française de Génie Parasismique, Nov 2015, Marne La Vallée, France. ⟨cea-02509662⟩

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