Numerical simulation of composite slabs with steel deck under fire conditions Conference Paper uri icon


  • A composite slab consists of a concrete topping cast on the top of a steel deck. The concrete is usually reinforced with a steel mesh on the top and may also be reinforced using individual rebars. The steel deck also acts as reinforcement and may be directly exposed to accidental fire conditions. This composite solution is widely used in every type of buildings which require fire resistance, in accordance to regulations and standards. The scope of this investigation concerns the fire rating for insulation (I). Numerical simulation was developed, using Matlab PDE toolbox and ANSYS, to find out the thermal effects of standard fire exposure. The results of the numerical simulation are compared with experimental results available in the literature in order to validate our approach. The results are also compared with the simplified method proposed by Eurocode 4-part 1.2.
  • A composite steel-concrete slab consists of a concrete topping cast on the top of a profiled steel deck. Normally, the concrete is reinforced with an anti-crack mesh positioned on the upper part and individual reinforcing bars placed within the ribs, see Figure 1. The steel deck acts as a permanent formwork and the composite action between the steel and concrete is generally achieved by indentations or embossments in the steel deck. Due to the reinforcement provided by the steel deck, composite slabs are generally slenderer and more efficient than flat concrete slabs because require less additional reinforcement and less concrete as well. The reduction of the construction time, simplicity of installation and reduction/elimination of struts are other advantages of composite slabs that should be highlighted.

publication date

  • January 1, 2019