This paper shows the effect of coarse aggregates in concrete with perfobond rib via experimental and FE analysis. First, the model of a single PBL in ordinary concrete was reproduced through a three-dimensional nonlinear FE model. Coarse aggregates were added to the model; it was found that the coarse aggregates around the perforation of PBL increased its initial load-carrying capacity. Furthermore, the interlocking of these coarse aggregates was found to affect PBL behavior after the peak of loadcarrying capacity. Next, analytical numerical modeling of push-out tests of single PBL was performed to investigate the role of coarse aggregates. It was confirmed that the initial load-carrying capacity could be increased via the vertical loading stress from the steel to the coarse aggregates. Finally, the numerical modeling results were verified by actual push-out tests of single PBL with systematically sorted coarse aggregates.