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Article Dans Une Revue International Journal of Heat and Mass Transfer Année : 2019

Modeling of 3D moisture distribution in heated concrete: From continuum towards mesoscopic approach

Résumé

The exposure of concrete to fire, which often leads to spalling, is a phenomenon that is not yet fully understood. Given the complexity of the thermo-hydro-mechanical phenomena and their strong interaction, a combined numerical-experimental approach is indispensable for understanding the behaviour of concrete at high temperature with respect to spalling. This paper deals with the numerical modeling of moisture distribution in heated concrete, a parameter often linked with spalling, by making use of original experimental data from in-situ neutron tomography. A homogenized continuum model has been employed for investigating various aspects, such as: speed of the drying front, moisture accumulation behind this front, experimental boundary effects etc. In addition, a fully coupled 3D thermo-hydo-mechanical (THM) model on the mesoscale is presented and used for simulating an experiment with a single aggregate for the purpose of investigating the influence of the aggregate on the drying front.
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Dates et versions

hal-04346885 , version 1 (02-02-2024)

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Dorjan Dauti, Stefano Dal Pont, Matthieu Briffaut, Benedikt Weber. Modeling of 3D moisture distribution in heated concrete: From continuum towards mesoscopic approach. International Journal of Heat and Mass Transfer, 2019, 134, pp.1137-1152. ⟨10.1016/j.ijheatmasstransfer.2019.02.017⟩. ⟨hal-04346885⟩

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