Experimental Investigation on The Compressive Behaviour of GFRP-Reinforced Concrete Short Columns

Document Type : Original Article

Authors

1 Department of Civil Engineering, Faculty of Engineering Mataria, Helwan University, Cairo, Egypt

2 Department of Civil Engineering, Ain Shams University, Cairo, Egypt

Abstract

This study investigates the compressive response of concrete columns incorporating Glass Fiber-Reinforced Polymer (GFRP) reinforcement bars under eccentric vertical loading conditions. The experimental study encompassed six reinforced concrete (RC) columns, partitioned into two groups: one incorporating conventional reinforcement steel and the other utilizing GFRP longitudinal reinforcement bars. The primary variables considered included reinforcement type, reinforcement ratio, and eccentricity-to-thickness (e⁄t) ratio. The objective was to evaluate the structural performance of GFRP bars as primary reinforcement in RC columns and assess their viability as a substitute for steel reinforcement in compression-dominated applications. The results revealed pronounced disparities in load-carrying capacities and ductility, particularly under varying e⁄t ratios, underscoring the significance of reinforcement material on column response. These findings promote to the advancement of knowledge on the performance characteristics of GFRP-reinforced concrete columns and provide essential insights for their implementation in structural design. The outcomes of this research contribute to the growing body of evidence supporting the use of GFRP reinforcement in structural applications, while highlighting critical considerations for optimizing design methodologies to ensure structural efficiency and safety.

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