In recent years, the FRP-concrete composite bridge deck system has been introduced
because of its light-weight and durability. The FRP-concrete composite bridge deck is composed of
FRP module and concrete, and they are connected with shear connectors. In order to insure the
composite action between FRP module and concrete, appropriate types of shear connector need to be
installed. In this study, new type of FRP shear connector was suggested and the experimental
investigations are conducted based on the studies of Perfobond. In the experimental study, the
push-out test was conducted and the load carrying mechanism was analyzed including the friction
effect of sand coating. Considering the load carrying mechanism of perforated shear connector under
shear force, the empirical equation for the prediction of shear strength of perforated FRP shear
connector was suggested.