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Theses

Diagnostic d'ouvrages en maçonnés : Méthodes Soniques Impact-Echo

Abstract : The heritage of European and particularly French infrastructure is aging. To be able to preserve it, it is necessary to establish a "state of health" of these works by auscultation. In order not to degrade them during the auscultation, non-destructive testing (NDT) methods must be used. We were particularly interested in a method known as the Impact-Echo method. The pathology that caught our attention concerns voids or defects that may be located in the filling of masonry bridges, beyond the vaults or the head walls. In order to make the most of the auscultation method, a numerical study to simulate an Impact-Echo test on a bilayer structure containing a defect is developed. Faced with the difficulty of interpreting the results from this simulation, a numerical factorial design of experiments is introduced. For this experimental design four factors are retained. Two factors linked to the geometry of the structure e1 and d, a factor linked to the materials composing the structures R and a purely numerical factor . Other output variables, other than reading the peak position, are introduced. At the end of this experimental design, we were able to identify relations, which made it possible to link the input factors to the different output variables. These relations were first tested on the data used to establish them. An experimental campaign was introduced in order to validate the numerical simulation. For this validation, we tried to exploit the trials of the experimental companion using the different relations obtained from the numerical factorial design of the experiment.
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Submitted on : Thursday, January 7, 2021 - 11:50:07 AM
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  • HAL Id : tel-03101755, version 1

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Hajer Rezgui Chaabouni. Diagnostic d'ouvrages en maçonnés : Méthodes Soniques Impact-Echo. Génie civil. Université de Limoges, 2020. Français. ⟨NNT : 2020LIMO0060⟩. ⟨tel-03101755⟩

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