Unified Model of Local Bond between Deformed Steel Rebar and Concrete: Indentation Analogy Theory and Validation
Publication: Journal of Engineering Mechanics
Volume 141, Issue 10
Abstract
Two distinct groups of bond models were developed on the basis of dominant concrete splitting and rebar–concrete interfacial failures, respectively. Their accuracy highly depended on the specific test data sets selected in analysis and validation. In this study, a unified model of local bond is proposed and developed on the basis of the indentation analogy at the rib front of the deformed rebar and on the concrete plastic deformation around the rebar. Unlike existing models, the unified model is completely validated with all sets of test data available in the literature. It can accurately predict the transition mechanism of failure modes from concrete splitting to rebar pullout. The predicted bond strength is in excellent agreement with experimental results as the rib spacing-to-height ratio changes in practical range.
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Acknowledgments
Financial support for this study was provided in part by the National Science Foundation under Award No. CMMI-0900159 and by the Dept. of Civil, Architectural, and Environmental Engineering at Missouri Univ. of Science and Technology. The findings and opinions expressed in this paper are those of the authors only and do not necessarily represent those of the sponsors.
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Published In
Journal of Engineering Mechanics
Volume 141 • Issue 10 • October 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Oct 20, 2014
Accepted: Feb 2, 2015
Published online: May 7, 2015
Published in print: Oct 1, 2015
Discussion open until: Oct 7, 2015
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