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A platform for research: civil engineering, architecture and urbanism
Behaviour of GFRP-RC Slender Circular Columns Subjected to Eccentric Loads
Slender circular concrete columns carry less loads compared to their short counterparts due to their geometrical configuration or slenderness ratio. Due to corrosion, conventional steel-reinforced concrete (RC) columns cannot keep the structural integrity in harsh environmental for their entire design service life. In recent years, the non-corrodible fibre-reinforced polymer (FRP) bars have been established as an internal reinforcement for RC structures. However, current design codes and guidelines do not allow the contribution of FRP bars in slender columns, exceeding a slenderness ratio of 22 and bent in single curvature. The lack of code provisions drew the need for investigation on the behaviour of slender columns. This study aimed at experimentally investigating the behaviour of circular columns with a slenderness ratio of 45. The results of two glass FRP-RC slender columns with a length of 4000 mm and a diameter of 355 mm, loaded with an eccentricity-to-diameter ratio of 8.5%, are reported. The test parameter of the study was the longitudinal reinforcement ratio (1.2 and 3.5%). It was found that the column with higher reinforcement ratio carried 13.7% more load and had 35% less deflection compared to its counterpart with less reinforcement. Moreover, the column with higher reinforcement ratio showed more deformable failure mechanism, which can be attributed to the improved confinement resulted from the large number of longitudinal bars.
Behaviour of GFRP-RC Slender Circular Columns Subjected to Eccentric Loads
Slender circular concrete columns carry less loads compared to their short counterparts due to their geometrical configuration or slenderness ratio. Due to corrosion, conventional steel-reinforced concrete (RC) columns cannot keep the structural integrity in harsh environmental for their entire design service life. In recent years, the non-corrodible fibre-reinforced polymer (FRP) bars have been established as an internal reinforcement for RC structures. However, current design codes and guidelines do not allow the contribution of FRP bars in slender columns, exceeding a slenderness ratio of 22 and bent in single curvature. The lack of code provisions drew the need for investigation on the behaviour of slender columns. This study aimed at experimentally investigating the behaviour of circular columns with a slenderness ratio of 45. The results of two glass FRP-RC slender columns with a length of 4000 mm and a diameter of 355 mm, loaded with an eccentricity-to-diameter ratio of 8.5%, are reported. The test parameter of the study was the longitudinal reinforcement ratio (1.2 and 3.5%). It was found that the column with higher reinforcement ratio carried 13.7% more load and had 35% less deflection compared to its counterpart with less reinforcement. Moreover, the column with higher reinforcement ratio showed more deformable failure mechanism, which can be attributed to the improved confinement resulted from the large number of longitudinal bars.
Behaviour of GFRP-RC Slender Circular Columns Subjected to Eccentric Loads
Lecture Notes in Civil Engineering
Gupta, Rishi (editor) / Sun, Min (editor) / Brzev, Svetlana (editor) / Alam, M. Shahria (editor) / Ng, Kelvin Tsun Wai (editor) / Li, Jianbing (editor) / El Damatty, Ashraf (editor) / Lim, Clark (editor) / Rahman, S. M. Hasanur (author) / El-Salakawy, Ehab (author)
Canadian Society of Civil Engineering Annual Conference ; 2022 ; Whistler, BC, BC, Canada
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2022 ; Chapter: 26 ; 387-395
2023-08-06
9 pages
Article/Chapter (Book)
Electronic Resource
English
Investigation of GFRP strengthened RC non-slender columns under eccentric loading
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