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Experimental studies and theoretical models for concrete columns confined with FRP composites: a review

Abdurra’uf M. Gora (Department of Civil Engineering, Faculty of Engineering, University of Nottingham, Semenyih, Malaysia)
Jayaprakash Jaganathan (School of Civil Engineering, Vellore Institute of Technology, Vellore, India)
M.P. Anwar (Department of Civil Engineering, Faculty of Engineering, University of Nottingham, Semenyih, Malaysia)
H.Y. Leung (School of Engineering, Nazarbayev University, Astana, Kazakhstan)

World Journal of Engineering

ISSN: 1708-5284

Article publication date: 14 June 2019

Issue publication date: 20 August 2019

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Abstract

Purpose

Advanced fibre-reinforced polymer (FRP) composites have been increasingly used over the past two decades for strengthening, upgrading and restoring degraded civil engineering infrastructure. Substantial experimental investigations have been conducted in recent years to understand the compressive behaviour of FRP-confined concrete columns. A considerable number of confinement models to predict the compressive behaviour of FRP-strengthened concrete columns have been developed from the results of these experimental investigations. The purpose of this paper is to present a comprehensive review of experimental investigations and theoretical models of circular and non-circular concrete columns confined with FRP reinforcement.

Design/methodology/approach

The paper reviews previous experimental test results on circular and non-circular concrete columns confined with FRP reinforcement under concentric and eccentric loading conditions and highlights the behaviour and mechanics of FRP confinement in these columns. The paper also reviews existing confinement models for concrete columns confined with FRP composites in both circular and non-circular sections.

Findings

This paper demonstrates that the performance and effectiveness of FRP confinement in concrete columns have been extensively investigated and proven effective in enhancing the structural performance and ductility of strengthened columns. The strength and ductility enhancement depend on the number of FRP layers, concrete compressive strength, corner radius for non-circular columns and intensity of load eccentricity for eccentrically loaded columns. The impact of existing theoretical models and directions for future research are also presented.

Originality/value

Potential researchers will gain insight into existing experimental and theoretical studies and future research directions.

Keywords

Citation

Gora, A.M., Jaganathan, J., Anwar, M.P. and Leung, H.Y. (2019), "Experimental studies and theoretical models for concrete columns confined with FRP composites: a review", World Journal of Engineering, Vol. 16 No. 4, pp. 509-525. https://doi.org/10.1108/WJE-01-2018-0026

Publisher

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Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited