Simplified Modeling Strategy for the Thermomechanical Analysis of Massive Reinforced Concrete Structures at an Early Age

Jacky Mazars 1 Stéphane Grange 2 Matthieu Briffaut 1
1 RV - Risques, Vulnérabilité des structures et comportement mécanique des matériaux
3SR - Laboratoire sols, solides, structures - risques [Grenoble]
2 M2S - Mécanique des Matériaux et des Structures
GEOMAS - Géomécanique, Matériaux et Structures
Abstract : The objective of this work is to propose a comprehensive and efficient modeling approach to simulate the entire loading program of the RG8 test (both the restrained shrinkage and mechanical parts) performed within the framework of the French national program CEOS.fr. This effort was made possible by introducing a multi-fiber beam discretization that included a thermomechanical model coupled with a unilateral concrete damage model. Due to the massiveness of the test structure, the scale effect needed to be taken into account. This step could be accomplished through use of a Weibull law. Extensive results were obtained during the experiment, some of which focused on deformations and forces developed in the structure by restrained shrinkage, the times of crack appearance and opening, and the consequences of damage sustained on the residual mechanical performance of the beam. A comparison with calculation output has demonstrated the ability of our modeling approach to simulate phenomena at both global and local levels, thus confirming the relevance of model choices made.
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https://hal.archives-ouvertes.fr/hal-01735472
Contributor : Stéphane Grange <>
Submitted on : Friday, March 16, 2018 - 6:41:10 AM
Last modification on : Wednesday, November 20, 2019 - 7:50:41 AM

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Jacky Mazars, Stéphane Grange, Matthieu Briffaut. Simplified Modeling Strategy for the Thermomechanical Analysis of Massive Reinforced Concrete Structures at an Early Age. Applied Sciences, MDPI, 2018, Modelling of Early Age Cracking Risks and Serviceability of Concrete Structures, 8 (3), pp.448. ⟨10.3390/app8030448⟩. ⟨hal-01735472⟩

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