Hygro-Thermal Modelling of Concrete Exposed to High Temperatures

Abstract:

As part of an ongoing research project into the numerical prediction of high temperature hygral processes in concrete and fire induced spalling, a fully coupled hygro-thermal model has been formulated for predicting the behaviour of concrete at high temperatures. The hygro-thermal model is a mathematical model for predicting the behaviour of concrete at high temperatures, treating the concrete as a multi-phase semi-saturated porous material. A numerical simulation of a one-dimensional heating experiment performed on an unreinforced concrete slab is presented, demonstrating the effectiveness of the model. A brief discussion of the main hygral processes is presented, in addition to a discussion of numerical challenges arising from the numerical implementation.

• Periodical: Applied Mechanics and Materials (Volume 553)
• Pages: 637-642
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.553.637
• Online since: May 2014
• Authors: James M. de Burgh*, Hamid R. Valipour, Stephen J. Foster
• Keywords: Concrete, Fire, High-Temperature, Hygro-Thermal, Modeling, Moisture, Spalling

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