Abstract
The authors propose a so-called life-span simulator that can predict concrete structural behaviors under arbitrary external forces and environmental conditions. In order to realize this kind of technology, two computational systems have been developed; one is a thermohygro system that covers microscopic phenomena in C-S-H gel and capillary pores, and the other one is a structural analysis system, which deals with macroscopic stress and deformational field. In this paper, the unification of mechanics and thermo-dynamics of materials and structures has been made with the ion transport of chloride, CO2 and O2 dissolution. This proposed integrated system can be used for simultaneous overall evaluation of structural and material performances without distinguishing between structure and durability.
Résumé
Les auteurs proposent un simulateur qui peut prévoir les comportements structuraux d'un béton (sur toute sa longuer de vie), soumis à des forces extérieures arbitraires et sous un environnement quelconque. Ce simulateur est basé sur le couplage de deux modèles analytiques: un modèle thermohydraulique qui simule les phénomènes microscopiques dans le gel C-S-H et les pores capillaires, et un modèle de structures qui intègre les contraintes macroscopiques et les déformations du béton. Dans cet article, l'association de la mécanique et thermodynamique des matériaux avec l'analyse des structures est réalisée par le transport des ions chlorhydriques, et la dissolution du CO2 et O2. Ce modèle intégré, que nous proposons, peut être utilisé simultanément pour l'évaluation complète des structures et pour l'évaluation des performances des matériaux, sans distinction entre structure et durabilité.
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Maekawa, K., Ishida, T. Modeling of structural performances under coupled environmental and weather actions. Mat. Struct. 35, 591–602 (2002). https://doi.org/10.1007/BF02480352
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DOI: https://doi.org/10.1007/BF02480352