Behavior of High-Strength Concrete Columns Reinforced with Galvanized Steel Equal-Angle Sections under Different Loading Conditions
Publication: Journal of Structural Engineering
Volume 144, Issue 7
Abstract
Experimental results are presented for a new method of reinforcing concrete columns with galvanized steel equal-angle (GSEA) sections. For the same cross-sectional area, a GSEA section has a higher second moment of area than a conventional steel bar, which leads to a higher bending stiffness of the GSEA reinforced concrete member. In addition, the area of confined concrete is higher in GSEA reinforced concrete members than in steel bar reinforced members, which results in higher strength and ductility. The experimental program involved testing of 20 square, high-strength concrete (HSC) specimens under concentric axial load, eccentric axial load, and four-point loading. The specimens were reinforced longitudinally with either four N12 (12-mm-diameter deformed steel) bars or four GSEA sections and transversely with R10 (10-mm-diameter plain steel) bars. The specimens were 800 mm high with a square cross section. Fifteen specimens were tested under either a concentric or eccentric axial load. The remaining five specimens were tested under four-point loading. Effects of the type of longitudinal reinforcement, spacing of transverse reinforcement, and loading conditions on the behavior of HSC specimens were investigated and discussed. Experimental results showed that, in general, specimens reinforced with GSEA sections had higher load-carrying capacities than the specimens reinforced with steel bars. In addition, the postpeak load-deformation behavior was observed to be more pronounced in specimens reinforced with GSEA sections than in specimens reinforced with steel bars.
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Acknowledgments
The authors would like to thank the University of Wollongong, Australia, and technical officers at the High Bay Laboratory, especially Mr. Alan Grant, Mr. Fernando Escribano, Mr. Duncan Best, Mr. Ritchie Mclean, and Mr. Richard Gasser for their help in the experimental program of this study. Also, the second author would like to thank the Higher Committee for Education Development in Iraq and the University of Babylon for support of his Ph.D. scholarship.
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Information
Published In
Journal of Structural Engineering
Volume 144 • Issue 7 • July 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Feb 13, 2017
Accepted: Jan 3, 2018
Published online: Apr 23, 2018
Published in print: Jul 1, 2018
Discussion open until: Sep 23, 2018
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