Axial-Flexural Interactions of GFRP-CFFT Columns with and without Reinforcing GFRP Bars
Publication: Journal of Composites for Construction
Volume 21, Issue 3
Abstract
This study presents the results of an experimental program and analytical modeling for axial-flexural interactions of concrete-filled glass fiber–reinforced polymer tube (GFRP-CFFT) columns with and without reinforcing glass fiber–reinforced polymer (GFRP) bars. The experimental program included four steel RC specimens, four GFRP-CFFT specimens, and four GFRP bar–reinforced GFRP-CFFT specimens with an outer diameter of 205–206 mm and a height of 800–812 mm. The specimens were tested under concentric and 25- and 50-mm eccentric axial loads and four-point load. The experimental results showed that GFRP bar–reinforced GFRP-CFFT specimens sustained higher peak axial loads, axial and lateral deformations at peak axial load, and flexural loads than GFRP-CFFT specimens without reinforcing GFRP bars and steel RC specimens. Axial load and bending moment () interactions of GFRP-CFFT specimens with and without reinforcing GFRP bars and steel RC specimens were analytically modeled. A parametric study was conducted to evaluate the effects of actual confinement ratio and GFRP bar reinforcement ratio on interactions of GFRP-CFFT specimens. The interactions were found to be significantly affected by both actual confinement ratio and GFRP bar reinforcement ratio.
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Acknowledgments
The authors thank the University of Wollongong, Australia, for providing the funding and facilities to carry out the experimental work. The authors also acknowledge the technical assistance provided by Mr. Fernando Escribano. The first author thanks the University of Engineering and Technology, Lahore; the Higher Education Commission (HEC) of Pakistan; and the University of Wollongong, Australia, for funding his Ph.D. studies.
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Published In
Journal of Composites for Construction
Volume 21 • Issue 3 • June 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Apr 21, 2016
Accepted: Sep 13, 2016
Published online: Nov 10, 2016
Discussion open until: Apr 10, 2017
Published in print: Jun 1, 2017
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