A new robust equation for shear strength of GFRP-RC deep beams using hybrid experimental and synthetic data based-FE quasi-static analysis procedure

•A Quasi-Static FE based CDP model for analysis of GFRP-RC deep beams is proposed.•The impacts of main design variables on the behavior of GFRP-RC deep beams are assessed.•The suitability of five international design codes is evaluated.•A new design formula for the ultimate concrete shear contribution of the GFRP-RC deep beams is proposed.