Elastoplastic Dilatant Interface Model for Cyclic Bond-Slip Behavior of Reinforcing Bars
Publication: Journal of Engineering Mechanics
Volume 142, Issue 2
Abstract
This paper presents a new interface model to simulate the cyclic bond-slip behavior of steel reinforcing bars embedded in concrete. A multi-surface plasticity formulation is used to model two major inelastic deformation mechanisms occurring in bond slip. One is the crushing and shearing of the concrete between the bar ribs, and the other is the sliding between the concrete and bar surfaces. These two mechanisms are represented by different yield surfaces and nonassociated flow rules. The flow rules account for the shear dilatation of the interface induced by the wedging action of the bar ribs and crushed concrete particles. The interface model has been implemented in a finite element analysis program and has been validated with experimental data. The model is easy to calibrate and is able to reproduce the bond-slip behavior of bars under a wide range of confinement situations, including bar pullout and concrete splitting failures.
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Acknowledgments
The authors wish to thank Fundacio La Caixa and Fundacion Caja Madrid for providing graduate fellowships to the first author for his doctoral studies at the University of California at San Diego, during which the research presented in this paper was conducted. However, opinions expressed in this paper are those of the authors and do not necessarily reflect those of the sponsors.
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Information
Published In
Journal of Engineering Mechanics
Volume 142 • Issue 2 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Aug 4, 2014
Accepted: Jul 16, 2015
Published online: Sep 2, 2015
Published in print: Feb 1, 2016
Discussion open until: Feb 2, 2016
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