New design equations for channel shear connectors in composite beams

Abstract

This paper briefly summarizes the results of an experimental research project involving the testing of push-out specimens with channel shear connectors. The test program consisted of three series, each with 12 push-out specimens. In each series, six specimens had solid concrete slabs and the other six specimens had concrete slabs incorporating wide-ribbed metal deck with ribs parallel to the beam. The test parameters included the compressive strength of concrete and the length and web thickness of the channel shear connector. The test results showed that, for a given length of channel, the concrete strength dictates the failure mode. In specimens with higher strength concrete, failure was caused by the fracture of the channel web. Concrete crushing–splitting was the observed mode of failure in specimens with solid slabs when lower strength concrete was used. A concrete shear plane type of failure was observed in most of the specimens with metal deck slabs. The strengths of concrete used ranged from 21 MPa to a maximum of 35 MPa.