Abstract
This study presents an experimental investigation to evaluate the behavior of circular geopolymer concrete columns reinforced with Glass Fiber Reinforced Polymer (GFRP) bars and helices under axial compression. Four circular geopolymer concrete columns of 160 mm diameter and 640 mm height were tested under concentric and eccentric axial loading. Two columns were reinforced with longitudinal steel bars and steel helices and two columns were reinforced with longitudinal GFRP bars and GFRP helices. The influence of the type of internal reinforcement and the axial loading eccentricity were investigated. The GFRP bar reinforced columns achieved lower axial load-carrying capacity than the steel bar reinforced columns under both concentric and 35 mm eccentric axial loadings. The axial load carrying capacity of concentrically loaded GFRP bar reinforced column was 15% less than the axial load carrying capacity of steel bar reinforced column. However, the axial load carrying capacity of eccentrically loaded GFRP bar reinforced column was only 5% less than the axial load carrying capacity of steel bar reinforced column. The ductility of concentric and 35 mm eccentric axially loaded GFRP bar reinforced columns were about 42% and 7% less, respectively than the ductility of their steel counterpart.
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Acknowledgements
The authors would like to acknowledge the support provided by the technical staff especially Mr. Fernando Escribano, Duncan Best, and Ritchie McLean at the University of Wollongong. Also, the authors would like to thank MateenBar Australia for providing GFRP reinforcement for this research study. In addition, the first author wishes to extend the acknowledgements of the Higher Education Commission Pakistan and the University of Wollongong for the support of his Ph.D.
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© 2023 Canadian Society for Civil Engineering
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Ali, S., Sheikh, M., Hadi, M.N.S., Cumming, I. (2023). Evaluation of GFRP Reinforced Circular Geopolymer Concrete Columns Under Concentric and Eccentric Axial Loading. In: Benmokrane, B., Mohamed, K., Farghaly, A., Mohamed, H. (eds) 8th International Conference on Advanced Composite Materials in Bridges and Structures. Lecture Notes in Civil Engineering, vol 278. Springer, Cham. https://doi.org/10.1007/978-3-031-09632-7_34
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DOI: https://doi.org/10.1007/978-3-031-09632-7_34
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