An analytical study on the dynamic strength of perforrated steel plate shear connectors

The perforated steel plate shear connectors (PBL) are one of the best joint part for composite structure because they have excellent ultimate shear strength and durability performance. In fact, many experimental studies have been already carried out on the static push-out and pullout strength of PBL with transverse reinforcement and several design formula for static load have already been proposed. However, all of them are valid only for the same concrete failure type in their experiment. So there is no design formula for arbitrary failure type. Moreover it is pointed out that failure behaviour of concrete subjected to dynamic load is generally different from the behaviour under the static load. Therefore we need to grasp the influence of loading speed on the strength of PBL. In this paper, to establish a general evaluation method of their ultimate strength for an arbitrary condition, the analyses of PBL using SPH method are conducted and we investigate their load bearing capacity and failure mechanism. At first, both effects of tensile failure and compression failure in the load bearing capacity of PBL are considered using simple model. Secondly, static push-out test are simulated by SPH analysis and the applicability of SPH is confirmed. Finally, the load bearing capacity of PBL under dynamic load are simulated and the influence of loading speed can be predicted.