3D Numerical Modeling of the Crack-Permeability Interaction in Fractured Concrete
Résumé
In the present work, a coupled mechanical-hydraulic-based approach is proposed for numerical modeling of the interdependent mechanical and hydraulic behavior of fractured concrete. The proposed model is developed within the framework of the non linear poromechanics. A damage based model is used to describe the mechanical behavior of the solid phase (the solid skeleton). Crack estimation is, therefore, performed using a post-processing method based on the fracture energy regularization. The hydraulic behavior is governed by the Darcy's law for the uncracked material. After cracking, the flow through fracture is driven by the cubic law and an anisotropic description of the material permeability is, therefore, assumed. The validation is performed on a splitting test where a real-time crack-permeability interaction is assessed. The capability of the proposed model to accurately reproduce the experimental results is proven.