Experimental study of the mechanical behavior of timber-concrete shear connections with threaded reinforcing bars

This paper presents the experimental results of push-out tests on simple timber-concrete connection systems. The tested configurations concern the notch without rod, the rod without notch and the notch combined to rod. The rod is composed by common reinforcing steel bar threaded at their extremity and screwed in the timber beam. These fasteners are combined with rectangular or triangular notch connections between timber and concrete. These solutions are chosen because they are simple to apply in a timber-concrete composite structure using materials available in the local market. The mechanical properties such as the strength, the slip modulus and the failure mode of the tested specimens are obtained from the load-slip curves of the push-out tests. The comparisons are done to evaluate the differences and similarities between the various tested shear connections. The comparisons show the efficiency of the simple composite systems of connections tested using the reinforcing steel bars alone or combined with a notch connection in the timber beam.