Abstract
Recent research has defined the general behaviour of concrete columns reinforced with glass fibre-reinforced polymer (GFRP) bars; however, current design provisions in codes and guidelines for FRP-reinforced concrete (RC) structures still either neglect the compressive strength of GFRP bars or limit their use in slender columns. In this study, six large-scale high strength concrete (HSC) columns reinforced with GFRP bars and spirals were constructed and tested under eccentric axial loading. Test variables included the slenderness ratio (λ = 14, 20 and 28) and the eccentricity-to-diameter ratio (e/D = 0.17 and 0.34). The specimens had a diameter of 350 mm with three different heights: 1,250, 1,750 and 2,450 mm. The specimens were designed to satisfy the Canadian standards for FRP-RC structures. All columns failed by concrete crushing. Test results showed that increasing the slenderness ratio from 14 to 20 and further to 28, decreased the axial capacity by 8.3 and 20%, respectively, for columns with e/D = 0.17. Doubling the eccentricity (e/D = 0.34) resulted in a reduction in the axial capacity by 8 and 22%, respectively, for the same increase in the slenderness ratio. Similarly, the HSC columns showed a reduction in the axial load capacity by 53.7, 53.6 and 54.7% when the e/D increased from 0.17 to 0.34 for columns with slenderness ratio of 14, 20 and 28, respectively. As expected, the lateral displacement increased as the slenderness ratio and the eccentricity increased. It was also found that longitudinal bars were able to effectively contribute to the load carrying capacity of the columns.
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References
Abdelazim W, Mohamed HM, Benmokrane B, Nolan S (2020) Strength of bridge high-strength concrete slender compression members reinforced with GFRP bars and spirals: experiments and second-order analysis. ASCE, J. Bridge Eng. 25(9):04020066
ACI Committee 222 (2019). “Guide to Protection of Metalsin Concrete Against Corrosion” ACI 222R-19. American Concrete Institute (ACI): Farmington Hills, Detroit, MI
ACI Committee 440 (2015). “Guide for the Design and Construction of Structural Concrete Reinforced with Fiber-Reinforced Polymer (FRP) Bars”. ACI 440.1R-15. American Concrete Institute (ACI): Farmington Hills, Detroit, MI
Barua S, El-Salakawy E (2020) Performance of GFRP-reinforced concrete circular short columns under concentric, eccentric, and flexural loads. ASCE, J. Composites Constr. 24(5):04020044
CSA (2019a). “Design of Concrete Structures”, CSA A23.3–19, Canadian Standard Association (CSA): Toronto, Ontario, Canada
CSA (2019b). “Canadian Highway Bridge Design Code” CSA S6–19. Canadian Standard Association (CSA): Toronto, Ontario, Canada
CSA (2017). “Design and construction of building structures with fibre-reinforced polymers” CSA S806-12. Canadian Standard Association (CSA): Toronto, Ontario, Canada
De Luca A, Matta F, Nanni A (2010) Behavior of full-scale glass fiber-reinforced polymer reinforced concrete columns under axial load. ACI Struct J 107(5):589–596
Hadhood A, Mohamed HM, Benmokrane B (2016) Experimental study of circular high-strength concrete columns reinforced with GFRP bars and spirals under concentric and eccentric loading. ASCE J Composites Constr 21(2):04016078
Hadi MNS, Hasan HA, Sheikh MN (2017) Experimental investigation of circular high-strength concrete columns reinforced with glass fiber-reinforced polymer bars and helices under different loading conditions. ASCE J Composites Constr 21(4):04017005
Hales TA, Pantelides CP, Reaveley LD (2016) Experimental evaluation of slender high-strength concrete columns with GFRP and hybrid reinforcement. ASCE J Composites Constr 20(6):04016050
ISIS Canada (2007). “Reinforcing Concrete Structures with Fibre Reinforced Polymers.“ Design Manual No.3. ISIS Canada corporation: University of Manitoba, p 103, Winnipeg, Canada
Khorramian K, Sadeghian P (2017) Experimental and analytical behavior of short concrete columns reinforced with GFRP bars under eccentric loading. Eng Struct 151:761–773
Tavassoli A, Sheikh SA (2017) Seismic resistance of circular columns reinforced with steel and GFRP. ASCE J Composites Constr 21(4):04017002
Acknowledgements
The authors would like to thank the Natural Sciences and Engineering Research Council of Canada (NSERC) for the financial support. The GFRP material was generously provided by Pultrall Inc. The authors would also like to thank the technical staff at the W.R. McQuade Heavy Structures Laboratory at the University of Manitoba for their assistance.
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Almomani, M., Mahmoud, K., El-Salakawy, E. (2022). Effect of Slenderness Ratio on HSC Columns Reinforced with GFRP Bars and Spirals. In: Walbridge, S., et al. Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021. CSCE 2021. Lecture Notes in Civil Engineering, vol 244. Springer, Singapore. https://doi.org/10.1007/978-981-19-0656-5_48
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DOI: https://doi.org/10.1007/978-981-19-0656-5_48
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