Development of an integrated modelling methodology for compartment fires by implementing a weak coupling strategy between a CFD and an FE software

This article presents the assumptions and the issues that arise when developing an integrated modelling methodology between a Computational Fluid Dynamics (CFD) software applied to compartment fires and a finite element (FE) software applied to structural systems. In particular, a weak coupling methodology use to simulate a fire exposed structure by modelling the fire development in the compartment, the heat penetration in the structure and the mechanical response is described. The advantages and the disadvantages of such a technique are highlighted compared to a full coupling that conversely takes into account all mutual interactions. This methodology is particularly suitable for relatively thin steel structures in large compartments. Moreover, the need of a standardised transfer file in order to get the methodology as flexible as possible in term of versatility is emphasized.