Development Length and Bond Behavior of Steel Bars in Steel Fiber–Reinforced Concrete in Flexural Test
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 1
Abstract
The bond between concrete and steel bars defines the structural behavior of reinforced concrete—each is the complement of the other. The bond allows for the compatibility of strains, transmission of stresses, and good mechanical behavior, with less possibility of the concrete cracking; this can result in the protection of the reinforcement and a higher structural durability. This study investigates (1) the bond behavior between concrete and steel bars, and (2) the development length of steel bars in steel fiber-reinforced concrete (SFRC). For the tests, the bars had diameters of 8 and 12.5 mm with full development lengths (), and with reductions of 50% () and 25% (). The volume fraction of steel fibers () had values of 0.0%, 0.5%, and 1.5%. In the results, the flexural ultimate loading for SFRC was higher than for nonfiber-reinforced concrete. For samples with a of 1.5%, the bond strength was higher than that found in other concretes, confirming that the use of steel fibers improved the bond between concrete and reinforcement and the effectiveness of the proposed test system.
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Acknowledgments
The authors would like to thank the Institute of Ecological Research of the Amazon (Instituto de Pesquisas Ecológicas da Amazônia, IPEAM) for the support of this and other research carried out in the Amazon.
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Published In
Journal of Materials in Civil Engineering
Volume 32 • Issue 1 • January 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Oct 4, 2018
Accepted: Jun 19, 2019
Published online: Oct 31, 2019
Published in print: Jan 1, 2020
Discussion open until: Mar 31, 2020
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