Title: Assessment of Shear Strength Design Models for Fiber-Reinforced Concrete Deep Beams Reinforced with Steel or FRP Bars

Author(s): Ahmed G. Bediwy and Ehab F. El-Salakawy

Publication: Symposium Paper

Volume: 356

Issue:

Appears on pages(s): 170-190

Keywords: empirical models, database, FRP, FRC, shear strength, deep beams

DOI: 10.14359/51737270

Date: 10/1/2022

Abstract:
Deep beams are common elements in concrete structures such as bridges, water tanks, and parking garages, which are usually exposed to harsh environments. To mitigate corrosion-induced damage in these structures, steel reinforcement is replaced by fiber-reinforced polymers (FRPs). Several attempts have been made during the last decade to introduce empirical models to estimate the shear strength of FRP-reinforced concrete (RC) deep beams. In this study, the applicability of these models to predict the capacity of simply supported deep beams with and without web reinforcement was assessed. Test results of 54 FRP-RC, 24 steel-fiber-reinforced concrete (FRC), and 7 FRP-FRC deep beams were used to evaluate the available models. In addition, a proposed model to predict the shear strength of FRPFRC deep beams was introduced. The model was calibrated against experiments conducted previously by the authors on FRP-FRC deep beams under gravity load. The model could predict the ultimate capacity with a mean experimental-to-predicted value of 1.04 and a standard deviation of 0.14.