Improved calculation methods for the temperature of the steel components of composite slabs under fire conditions

A composite steel-concrete slab consists of a profiled steel deck that acts as permanent formwork to the concrete topping, which is normally reinforced with individual rebars and an anti-crack mesh. The Annex D of the EN 1994-1-2 provides guidelines for the calculation of the temperature of the rebars and the parts of the steel deck of composite slabs subjected to the standard fire from below. However, no revisions were made to these methods during the last two decades. This work proposes an improved method for the estimation of the temperature of the parts of the steel deck and the rebars as well. The proposed expressions are derived from numerical simulations using a 3-D finite element model, considering perfect thermal contact between all the materials.

VIVO