FIRE RESISTANCE OF STEEL CONCRETE SLABS WITH T-SHAPE STEEL

This paper describes an experimental study on the fire performance of half SC slabs. The half SC slab is a composite slab consisting of steel plate instead of bottom rebars of reinforced concrete slab. Steel plates were welded with steel studs and T-shape steel. The objective of this study is to experimentally evaluate the effects of the dimensions of T-shape steel according to load. The following findings were obtained by the experiments : 1) T-shape steel in concrete prevents the half SC slabs from the shear failure during the initial phase of heating because T-shape steel binds thermal expansion of steel plate and the tensile stress of concrete are smaller than the concrete without T-shape steel. 2) Fire resistance of the half SC slabs is improved by T-shape steel avoiding the shear failure.