Abstract
This research article presents a numerical investigation of full interior connections reinforced with glass fiber reinforced polymer (GFRP) using the concrete damage plastic (CDP) model in ABAQUS software. The CDP model is initially verified by experimental results from the literature to achieve the optimum accuracy for parametric analysis. In addition, numerical results from calibration are compared against four international design codes and five empirical expressions proposed to estimate the punching shear capacity of GFRP-RC slab-column connections from the literature. Then, a numerical parametric study is performed by applying the calibrated CDP model to 324 large-scale GFRP-RC slab-column connections. The numerical investigation is then extended to assess the impact of various design parameters (i.e., the GFRP reinforcement ratio, slab depth, concrete strength, GFRP grade, and column dimensions) on the ductility index of the connections and compared with the same connections that are reinforced with conventional steel reinforcement. Finally, numerical investigation demonstrates the capability of the proposed CDP model to simulate and estimate the overall performance of the GFRP RC slab-column connections with good accuracy.