Abstract
A generalised three-dimensional finite element model is proposed for the study of structural behaviour of shear connectors in push-out tests of different specimen geometries, as well as different loading and boundary conditions. Concrete slabs, steel beams and shear connectors are modelled with eight-noded solid elements; and profiled steel deckings are modelled with eight-noded double curvature shell elements. It is assumed that steel deckings are bonded perfectly to concrete slabs, so that there is no relative slippage between steel deckings and concrete slabs. The accuracy of the model is verified through the calibration against a series of push-out tests. Premature failure in unbraced specimens due to flexural bending and global cracking in concrete sections was studied, and an analytical model is proposed for a better understanding of this failure mode.
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