RIS ID

109584

Publication Details

Khan, Q. S., Sheikh, M. Neaz. & Hadi, M. N. S. (2016). Axial-flexural interactions of GFRP-CFFT columns with and without reinforcing GFRP bars. Journal of Composites for Construction, Online First 1-12.

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 (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.

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