Structural behaviour of hybrid composite-concrete floors: Experimental validation and analytical simulation

•Two 3m span hybrid composite-concrete floors are tested under four point bending.•The load-deflection behaviour of hybrid floors is analytically modelled.•A good agreement is found between experiments and the analytical model.•All tested hybrid floors fulfil the SLS deflection and ULS loadbearing requirements. Hybrid composite-concrete elements are increasingly developed because of their lightweight and durable properties. This paper investigates the structural behaviour of a new hybrid composite concrete floor – based on the beam-and-block concept – analytically and experimentally. Experiments on two identical hybrid floors of 3m span demonstrate the structural feasibility of this floor concept as the loadbearing and stiffness requirements are largely met, both in casting and permanent stage. These floors exhibit sufficient stiffness in the transverse direction and thus allow an analytical prediction based on beam calculations. These simulations predict the casting deflection as well as the overall load-deflection behaviour accurately.