Abstract
A novel slab system composed by a cold-formed steel lipped channel section as permanent shuttering fastened to a rebar truss through plastic connectors was released in the market. However, the shear behavior between shuttering and concrete has not been fully investigated through experiments, reason why the system is still designed as a non-composite system. However, based on four-point bending tests, this research investigated the mechanical behavior of composite slabs in terms of both strength and stiffness. It was observed that the steel profile fully interacted with the concrete, increasing bending capacity by 2.61 times and ductility by five times when compared to prototypes without shuttering. Finally, the experimental results were compared to a proposed design procedure of the EN 1994-1-1:2004 based on rigid plastic analysis, which showed good agreement with theory, with average deviation of 6.5%.
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