Computational modeling of concrete when subjected to high temperatures: Application of a hygrothermal model
Thaís Rossi Lopes Soares1; Michèle Cristina Resende Farage1; Flávia de Souza Bastos1; Norbert Renault2
1 Universidade Federal de Juiz de Fora; 2 Université de Cergy-Pontoise
doi:10.20906/CPS/CILAMCE2017-0873
Resumo
High temperatures due to fire are amongst the most critical situations to which concrete may be exposed. For safety purposes, it is important to understand and preview the consequences of fire on the structural integrity of concrete. The mechanical degradation suffered by a concrete structure due to high temperatures is related to energy and mass transport in a porous medium. Hence, to describe a realistic behavior of concrete undergoing thermal loading, a model shall take into account simultaneously heat conduction, liquid and gaseous water flow, and the interactions of these fluid phases with the solid skeleton. Numerical simulations of the hygrothermal behavior of concrete specimen subjected to high temperature conditions are performed through a transient and nonlinear model, implemented in the Cast3M code which was developed at the French Atomic Research Center (CEA, France). In this study, we propose the application of a hygrothermal model to compare numerical and experimental results.
Palavras-chave: Concrete; High temperature; Hygrothermal behavior