Fire resistance of composite slabs with steel deck: experimental analysis and numerical simulation
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abstract
This work investigates the thermal behaviour of composite slabs with steel deck under
controlled test conditions corresponding to a fire from the bottom. This composite solution
consists of a concrete topping cast on the top of a steel deck. The concrete is typically
reinforced with a steel mesh and may also contain individual rebars. The deck also acts as
reinforcement and may be exposed to accidental fire conditions from the bottom. This
composite solution is widely used in every type of buildings and requires fire resistance, in
accordance to regulations and standards. Composite slabs need to meet fire-safety
requirements according to building codes. The fire assessment of this type of elements is
normally made using standard fire tests. Two samples are being prepared to be tested and
should take into account the criterion for stability (R), Integrity (E) and insulation (I). The
scope of this investigation concerns the fire rating for insulation (I). Numerical simulation
was performed through Matlab PDE toolbox for the thermal effects of standard fire exposure.
The results are also compared with the simplified method proposed by Eurocode, which
seems to be unsafe.
