Investigation of the Effectiveness of CFRP Strip Ties as Transverse Reinforcement for GFRP Bar–Reinforced Concrete Columns
Publication: Journal of Composites for Construction
Volume 26, Issue 5
Abstract
This paper investigates the effectiveness of carbon fiber–reinforced polymer strips ties (CST) as the transverse reinforcement for normal strength glass fiber–reinforced polymer reinforced concrete (GFRP-RC) square columns. The axial compressive behavior of GFRP-RC columns transversely reinforced with CST has been investigated. In particular, the effectiveness of CST configurations, confinement efficiency, and center-to-center spacing of the CST was investigated. A total of 13 specimens with 200 × 200 mm cross section and 800 mm height were tested until failure. One specimen was longitudinally reinforced with steel bars and transversely reinforced with square steel ties as a control specimen (S-RC). The remaining 12 specimens were longitudinally reinforced with GFRP bars and transversely reinforced by either square (S), or square overlapping square (SS), or square overlapping circular (SC) configurations of the CST. Test results showed that the specimens with SC configuration of CST achieved higher confinement efficiency and deformability than the specimens with S and SS configurations of the CST. In addition, the increases in the confinement efficiency and deformability for the reduction of the spacing of the CST are more pronounced for the specimens with SC configuration of the CST compared to the specimens with either S or SS configuration of the CST.
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Acknowledgments
The first author acknowledges the joint support and funding from the Higher Education Commission (HEC) of Pakistan and the University of Wollongong, Australia. All authors acknowledge the technical support provided by the technical staff, especially Mr. F. Escribano of the high bay laboratories of the School of Civil, Mining and Environmental Engineering, University of Wollongong, Australia. The authors also acknowledge Mateen Bar, Pultron Composites Ltd (Mateen Bar 2021), especially Mr. Ian Cumming of IRC Pvt Ltd for providing GFRP bars.
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Journal of Composites for Construction
Volume 26 • Issue 5 • October 2022
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© 2022 American Society of Civil Engineers.
History
Received: Dec 18, 2021
Accepted: May 23, 2022
Published online: Aug 4, 2022
Published in print: Oct 1, 2022
Discussion open until: Jan 4, 2023
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Cited by
- Muhammad Ayoub, Hayder Alaa Hasan, M. Neaz Sheikh, Muhammad N. S. Hadi, Experimental Behavior of GFRP Bar–Reinforced CFRP Strip Tie–Confined Normal-Strength Concrete Columns under Different Loading Conditions, Journal of Composites for Construction, 10.1061/JCCOF2.CCENG-4056, 27, 2, (2023).