A FULLY COUPLED THERMO-HYDRO MECHANICAL ANALYSIS OF THE IMPACT OF TEMPERATURE AND HUMIDITY VARIATION ON THE STATE OF HISTORICAL STONE BULDINGS - Université d'Orléans Accéder directement au contenu
Communication Dans Un Congrès Année : 2010

A FULLY COUPLED THERMO-HYDRO MECHANICAL ANALYSIS OF THE IMPACT OF TEMPERATURE AND HUMIDITY VARIATION ON THE STATE OF HISTORICAL STONE BULDINGS

Résumé

In order to understand, explain, predict and prevent the degradation of historical monuments in the valley of Loire in the region of Centre (in France) the authors of this paper have worked in the framework of a regional project baptized SACRE (http://www.crmd-sacre.com/) in the modeling of THM phenomena that are susceptible to take place on the walls of historical buildings and play a major role on the long-term degradation process. As part of this research program a numerical modeling of daily and annually variation on temperature and humidity was performed. The objectives of such a modeling are multiplies: firstly from an inverse analysis on measured data on temperature and humidity variation in various depth of a stone wall in Chambord Castle we try to asses the in situ values of some key parameters that control the humidity transport in the stone pores such as relative permeability, effective Flick's coefficient, thermal expansion coefficient of stones, etc. Secondly, once the full picture of the phenomena known and the parameters adjusted, some simulations are performed with the objective to produce at least some of most typical degradation forms observed in situ. This paper describes the numerical simulations performed in the framework of the first objective. The results show that a non-uniform gradient of temperature and humidity on the stone walls is a result of daily meteorological changes and could leads to differential stress inside stones and on interfaces with stones and mortars.
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Dates et versions

hal-00684168 , version 1 (30-03-2012)

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  • HAL Id : hal-00684168 , version 1

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Dashnor Hoxha, Do Duc Phi, Naïma Belayachi. A FULLY COUPLED THERMO-HYDRO MECHANICAL ANALYSIS OF THE IMPACT OF TEMPERATURE AND HUMIDITY VARIATION ON THE STATE OF HISTORICAL STONE BULDINGS. 8 th International Symposium on the Conservation of Monuments in the Mediterranean Basin, May 2010, Greece. ⟨hal-00684168⟩
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