Journal
JOURNAL OF COMPOSITES FOR CONSTRUCTION
Volume 21, Issue 3, Pages -Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)CC.1943-5614.0000771
Keywords
Concrete filled glass fiber-reinforced polymer tube (GFRP-CFFT); Glass fiber-reinforced polymer (GFRP) bar; Axial loads; Four-point load; Stress-strain model; P-M interaction
Funding
- University of Wollongong, Australia
- University of Engineering and Technology, Lahore
- Higher Education Commission (HEC) of Pakistan
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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 (P-M) 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 P-M interactions of GFRP-CFFT specimens. The P-M interactions were found to be significantly affected by both actual confinement ratio and GFRP bar reinforcement ratio. (C) 2016 American Society of Civil Engineers.
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