ABSTRACT
The design of concrete, composite steel and concrete and composite timber and concrete slabs for fire resistance is usually based on prescriptive ratings that specify the minimum slab thicknesses and the required concrete cover of the reinforcement. These ratings are generally based on standard fire resistance tests of particular elements using furnaces or simple design models of behaviour of slab as separated element. However, such approach does not represent a real structure as a whole as it does not account for overall floor behaviour. Fire resistance ratings of properly designed full floor systems is higher than those of single elements because the compressive restraint in the edging of the slab allows in the central part of the slab for membrane action to develop increasing the time to failure of the elements compared to the standard tests. For design of floor slabs et elevated temperature based Eurocode rules, may be applied advanced procedures by FEM analyses and simple procedures, see (Vassart & Zhao, 2011). The ductility of steel fibre reinforced concrete (SFRC) broadens the range of application of the reinforced concrete and composite steel-concrete structures. These materials are characterized by high resistance to cracking, corrosion, abrasion, impacts, fatigue and good resistance in exposition to the high temperatures, see (Lie & Kodur, 1996). Steel fibre reinforcement helps to maintain the residual strength and fracture toughness after being heated, see (Rustin & Kodur, 2011).
