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Theses

Comportement des réparations structurales en béton : couplage des effets hydriques et mécaniques

Abstract : Drying shrinkage may be a significant cause of deterioration of thin concrete repairs. Shrinkage induced stresses can at least partially be relieved by tensile creep. Hydration effects and interface properties may have significant influence on concrete repair behaviour. An important experimental study was undertaken
to understand the overall behaviour and to feed a numerical analysis tool. Different repair materials and setting techniques were studied. Long term and short term flexural tests were performed. Drying shrinkage and creep was found to be a very significant phenomenon for crack development. The used materials and setting techniques are shown to be very satisfying to restore structural capacity. The numerical formulation is presented in
this thesis. Both humidity effects and non-linear mechanical behaviour of the constitutive materials are taken into account. Phenomenological laws are used to describe mechanical damage and drying shrinkage. Moisture migration is described using a single diffusion equation. The aim of this numerical model is to obtain an analysis tool to complete experimental tests. Experimental results obtained on small lab specimens permit to calibrate numerical coefficients. Numerical results show close agreement with
experimental data.
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https://tel.archives-ouvertes.fr/tel-00009124
Contributor : Laurent Molez <>
Submitted on : Wednesday, April 27, 2005 - 5:09:11 PM
Last modification on : Monday, February 15, 2021 - 10:41:24 AM
Long-term archiving on: : Friday, September 14, 2012 - 12:50:11 PM

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  • HAL Id : tel-00009124, version 1

Citation

Laurent Molez. Comportement des réparations structurales en béton : couplage des effets hydriques et mécaniques. Sciences de l'ingénieur [physics]. École normale supérieure de Cachan - ENS Cachan; Université Laval, 2003. Français. ⟨tel-00009124⟩

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