Relevance of a mesoscopic modeling for the coupling between creep and damage in concrete

Abstract : In its service-life concrete is loaded and delayed strains appear due to creep phenomenon. Some theories suggest that micro-cracks nucleate and grow when concrete is submitted to a high sustained loading, thereby contributing to the weakening of concrete. Thus, it is important to understand the interaction between the viscoelastic deformation and damage in order to design reliable civil engineering structures. Several creep-damage theoretical models have been proposed in the literature. However, most of these models are based on empirical relations applied at the macroscopic scale. Coupling between creep and damage is mostly realized by adding some parameters to take into account the microstruc-ture effects. In the authors' opinion, the microstructure effects can be modeled by taking into account the effective interactions between the concrete matrix and the inclusions. In this paper, a viscoelastic model is combined with an isotropic damage model. The material volume is modeled by a Digital Concrete Model which takes into account the "real" aggregate size distribution of concrete. The results show that stresses are induced by strain incompatibilities between the matrix and aggregates at mesoscale under creep and lead to cracking.
Type de document :
Article dans une revue
Mechanics of Time-Dependent Materials, Society for Experimental Mechanics, 2013, 43, 〈10.1007/s11043-012-9199-4〉
Liste complète des métadonnées

Littérature citée [43 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-01584979
Contributeur : Mathias Legrand <>
Soumis le : lundi 11 septembre 2017 - 03:45:37
Dernière modification le : mardi 12 septembre 2017 - 01:09:09

Fichier

SGMLP.pdf
Fichiers produits par l'(les) auteur(s)

Licence


Distributed under a Creative Commons Paternité 4.0 International License

Identifiants

Collections

UNAM | GEM

Citation

Jacqueline Saliba, Frédéric Grondin, Mohammed Matallah, Ahmed Loukili, Hocine Boussa. Relevance of a mesoscopic modeling for the coupling between creep and damage in concrete. Mechanics of Time-Dependent Materials, Society for Experimental Mechanics, 2013, 43, 〈10.1007/s11043-012-9199-4〉. 〈hal-01584979〉

Partager

Métriques

Consultations de la notice

73

Téléchargements de fichiers

20