Development and validation of a 3D computational tool to describe concrete behaviour at mesoscale. Application to the alkali-silica reaction

This paper presents the development and the validation of a 3D numerical tool called “finite element model for concrete analysis method” (FEMCAM). This tool is established to model quasi-brittle and heterogeneous materials like concrete. This last one is here considered as a 3D biphasic material com...

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Bibliographic Details
Published in:Computational materials science 2009-10, Vol.46 (4), p.1163-1177
Main Authors: Comby-Peyrot, Isabelle, Bernard, Fabrice, Bouchard, Pierre-Olivier, Bay, François, Garcia-Diaz, Eric
Format: Article
Language:English
Subjects:
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Alkali-silica reaction
Applied sciences
Buildings. Public works
Concrete
Concretes. Mortars. Grouts
Engineering Sciences
Exact sciences and technology
Heterogeneous description
Materials
Mesolevel modelling
Mesomechanics
Mortar
Properties and performance tests of mortar and hardened concrete
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Summary:This paper presents the development and the validation of a 3D numerical tool called “finite element model for concrete analysis method” (FEMCAM). This tool is established to model quasi-brittle and heterogeneous materials like concrete. This last one is here considered as a 3D biphasic material composed of coarse aggregates embedded in mortar. A particular attention is paid to a realistic generation of particles in concrete sample. A non-local Mazars model is used to reproduce the mortar behaviour. The validation of this mesomodelling is performed by comparison with experimental results on various tests (3-point bending tests, compressive tests and “Brazilian” splitting tests). All these results are used to study the mechanical consequences of the alkali-silica reaction, one of the main and most famous chemical degradations of concrete structures such as dams, pavements or bridges. At the mesoscale, this reaction is characterized by a swelling of the reactive granular skeleton.
ISSN:0927-0256
1879-0801
DOI:10.1016/j.commatsci.2009.06.002