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This paper deals with the evaluation of the effect of shapes, angles and sizes of bent-up tab shear transfer enhancement in precast cold-formed steel-concrete composite beams. The study is performed through push-out testing on 14 specimens. The push-out test has been employed to assess the shear strength as well as the behaviour of the shear transfer enhancement. It is shown that specimens employed with shear transfer enhancements increase the shear capacities of the specimens as compared to those relying only on a natural bond between cold-formed steel and concrete. In the shear transfer enhancements investigated, a new proposed shear transfer enhancement called bent-up triangular tab shear transfer (BTTST) provided the best performance in terms of strength. Shear capacities of the shear transfer enhancement also increase when the angles and sizes of bent-up tabs shear transfer enhancement is increased. It is concluded that more efficient and feasible precast cold-formed steel-concrete composite beams can be obtained with this innovator proposed shear transfer enhancement.

The effect of bent-up tab shear transfer enhancement shapes, angles and sizes in precast cold-formed steel-concrete composite beams