Digital Concrete: A Multi-scale Approach for the Concrete Behavior

Ghassan Mounajed (1, 2) , Frédéric Grondin (1, 2) , Hélène Dumontet (1, 2) , Abdelwahed Ben Hamida

1 DALEMBERT - Institut Jean Le Rond d'Alembert
2 CSTB - Centre Scientifique et Technique du Bâtiment

This article presents a numerical method of homogenization in thermo-hydro-mechanic for materials based on the choice of a representative volume in which heterogeneities are generated in random process. The numerical model is used to predict elastic behaviour as well as thermal damage behaviour and the concrete permeability. This numerical model is developed and implemented in the general finite element code 'SYMPHONIE'. The Digital concrete model is used then to the calculation of the High Strength Concrete behaviour. Obtained results appear in good agreement with experimental measures and show the capacity of the model to take in account the size distribution of aggregates and pores of concrete. Furthermore, this method allows through the process of localization to estimate the local fields and to predict possible damages of the material.

Mots clés: stochastic homogenization; digital concrete; thermo-hydro-mechanical behaviour; localization

Domaines: Mécanique [physics.med-ph]; Matériaux

Ghassan Mounajed, Frédéric Grondin, Hélène Dumontet, Abdelwahed Ben Hamida. Digital Concrete: A Multi-scale Approach for the Concrete Behavior. Journal of Computational Methods in Sciences and Engineering, 2006, 6 (5-6), pp.325-337. ⟨10.3233/JCM-2006-65-606⟩. ⟨hal-01006747⟩