In this chapter, advanced models based on a general Thermo-Hydro-Chemo-Mechanical (THCM) framework are considered. In these approaches, the concrete is considered as a porous medium, the pores of which are partly filled by gas (a mixture of air and vapour) and water. First, the main physico-chemical phenomena that take place in heated concrete are explained. Then, mass, momentum and energy conservation equations as well as the constitutive model are detailed for the general model considering three fluid pressure fields. Indications are also given for the numerical solution of the obtained final equations. Finally, a simplified model based on a single fluid pressure field is presented
Advanced Modelling
Francesco Pesavento;
2019
Abstract
In this chapter, advanced models based on a general Thermo-Hydro-Chemo-Mechanical (THCM) framework are considered. In these approaches, the concrete is considered as a porous medium, the pores of which are partly filled by gas (a mixture of air and vapour) and water. First, the main physico-chemical phenomena that take place in heated concrete are explained. Then, mass, momentum and energy conservation equations as well as the constitutive model are detailed for the general model considering three fluid pressure fields. Indications are also given for the numerical solution of the obtained final equations. Finally, a simplified model based on a single fluid pressure field is presented
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