Performance of Hollow Glass Fiber-Reinforced Polymer Rebars
Publication: Journal of Composites for Construction
Volume 3, Issue 2
Abstract
The results of bond and tensile strength investigations of hollow glass-fiber reinforced plastic rebars are presented. Rebars with similar geometries but different microstructures were executed. Bond characteristics of on- and off-axis specimens, in terms of maximum sustained load, bond strength and stress, concrete compressive strength, and initial bond stress, are reported. It appears that the compressive strength of concrete has a minor influence on bond strength and stress performance of the composite reinforcement investigated herein. The bond between concrete and reinforcement is controlled by the geometry of the rebar, the embedment length, and the clear cover provided by the concrete. To confirm the experimental results, a computer simulation of the rebar's behavior was performed. Stresses and strains were computed for each layer of both rebar structures. The theoretical analysis coincides with the experimental results. The unidirectional bars exhibited higher longitudinal stresses in all three simulated loading schemes. The off-axis rebars showed higher transverse strains and stresses. The results of this study suggest that the microstructure of the composite bars is a significant factor influencing the bond performance. The specimens reinforced with unidirectional glass fibers showed higher bond strength than the off-axis fiber-reinforced specimens.
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Information
Published In
Journal of Composites for Construction
Volume 3 • Issue 2 • May 1999
Pages: 87 - 91
History
Published online: May 1, 1999
Published in print: May 1999
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