Resistance to longitudinal shear of composite slabs with longitudinal reinforcement

Tests are reported on composite slabs with trapezoidal sheeting and longitudinal reinforcing bars above the troughs. The contribution from this reinforcement to resistance to longitudinal shear is found to be substantial. Analyses of the results lead to a design method that allows for it. It may not be possible to take full advantage in the design of this extra resistance, because the predicted deflection in service may then become excessive.An appendix gives an elastic–plastic model that accurately predicts the deflection of the slabs just before failure. A list of the principal nomenclature is included.

► Tests on composite slabs with steel decking and longitudinal reinforcement
► The reinforcement contributes to the resistance of the slabs to longitudinal shear.
► A relevant design method, consistent with Eurocode 4 is given.