Etude hydro‐mécanique et thermo‐mécanique du béton. Influence des gradients et des incompatibilités de déformation

Abstract : When a concrete's structure is submitted to drying or heating at high temperatures different mechanisms at different study scales induce the global behaviour of this structure. Two mechanisms are here distinguished: hydral or thermal gradients at macroscopic scale and strain incompatibilities between cement paste and aggregates at mesoscopic scale. The aim of this thesis is to determine the effect of these two mechanisms. The simulations realized on Cast3M finite element software show the interest of doing “virtual tests” in addition to real experiments to be able to separate and quantify the different mechanisms responsible of mechanical properties degradations. In these works two complementary approaches are used: the macroscopic approach using one homogeneous mesh for concrete and the mesoscopic approach using one biphasic mesh considering the two phases cement paste and aggregates. The effect of mechanical model adopted during the simulations of drying or heating on damage and mechanical properties degradation is also studied.
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Contributor : Caroline de Sa <>
Submitted on : Thursday, May 15, 2008 - 2:22:10 PM
Last modification on : Friday, May 17, 2019 - 1:23:26 AM
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  • HAL Id : tel-00279849, version 1

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Caroline de Sa. Etude hydro‐mécanique et thermo‐mécanique du béton. Influence des gradients et des incompatibilités de déformation. Sciences de l'ingénieur [physics]. École normale supérieure de Cachan - ENS Cachan, 2007. Français. ⟨tel-00279849⟩

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