A Review of Punching Shear Strength in FRP-Reinforced Concrete Slab-Column Connections

Abstract

This review explores the use of Fiber Reinforced Polymer (FRP) bars to reinforce concrete slab-column connections, highlighting their potential to extend service life, reduce maintenance costs, and improve life-cycle cost efficiency. FRP bars offer a more environmentally friendly alternative to traditional steel reinforcement. The shear behavior of reinforced concrete structural members, which depends on complex internal load-carrying mechanisms, remains an active area of research. This article provides a comprehensive overview of the punching shear strength and behavior of FRP-reinforced concrete (FRP-RC) slab-column connections, both with and without FRP stirrups for shear reinforcement. It examines the mechanisms of punching shear in FRP-RC slab-column connections and reviews existing codes, proposed or modified models, and machine learning approaches for predicting the punching shear strength of these connections.

Keywords

• Slab-column connection
• punching shear capacity
• FRP bar
• machine learning
• design model

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