Behavior of Steel Fiber-Reinforced High-Strength Concrete Columns under Uniaxial Compression
Publication: Journal of Structural Engineering
Volume 136, Issue 10
Abstract
This paper presents tests that were performed on square large-scale steel-fiber-reinforced high-strength concrete (HSC) columns under concentric compression loading. The experimental program was mainly designed to examine the effect of the volumetric steel-fiber ratio on the behavior of reinforced HSC large-scale elements subjected to axial compression loading. The test program was also designed to examine the combined confinement effect of steel fibers and transverse steel reinforcement. Thus, the test variables studied herein are the steel-fiber volumetric ratio and the volumetric ratio, yield strength, and spacing of the transverse steel ties. The results show that adding discrete fibers to HSC mixtures in reinforced concrete columns not only prevents the premature spalling of the concrete cover but also increases the strength and ductility of the axially loaded reinforced member. This behavior was predicted by the proposed fiber-reinforced concrete stress-strain model, which takes into account most of the parameters that influence confinement effectiveness: the concrete strength; the spacing, yield strength, volumetric ratio, and configuration of the transverse reinforcement; the distribution of the longitudinal reinforcement; and the diameter, length, shape, volumetric ratio, and frictional bond strength of the fibers. Predictions were found to be in good agreement with experimental results.
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Acknowledgments
This research was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC). The writers wish to thank NSERC for its continuous support over the years. The fibers were gracefully provided by EuroSteel in Belgium.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 136 • Issue 10 • October 2010
Pages: 1225 - 1235
Copyright
© 2010 ASCE.
History
Received: Feb 6, 2009
Accepted: Feb 19, 2010
Published online: Feb 25, 2010
Published in print: Oct 2010
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