Título:
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Modelling of heat and moisture transfer in concrete at high temperature
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Autor/a:
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Rodríguez, Mariana; López Garello, Carlos María; Carol, Ignacio
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Otros autores:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental; Universitat Politècnica de Catalunya. MECMAT - Mecànica de Materials |
Abstract:
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Moisture diffusion and related fluid pressures play a key role in cracking and spalling of concrete subject to high temperatures. This paper describes recent developments of a mode for moisture and heat transfer in porous materials, to be combined with an existing and well tested meso-mechanical model for concrete. Liquid and gas flows are formulated separately, yet later they can be combined in terms of s single variable, Pv. The material pore distribution curve is taken as the basis for developing a new physically-based desorption isotherm alternative to the traditional Bazant & Thonguthai’s model. A simple academic example for temperatures between 27 and 800ºC is presented to show the behaviour of the model. |
Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures::Materials i estructures de formigó -Concrete--Cracking--Mathematical models -Concrete--Effect of temperature on -High temperature -Concrete -Heat and mass transfer -Numerical model. -Formigó -- Efecte de la temperatura |
Derechos:
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Tipo de documento:
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Artículo - Versión publicada Objeto de conferencia |
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