Bond-Slip Model for Detailed Finite-Element Analysis of Reinforced Concrete Structures
Publication: Journal of Structural Engineering
Volume 141, Issue 4
Abstract
A new interface model to simulate the bond-slip behavior of reinforcing bars is presented. The model adopts a semiempirical law to predict the bond stress-versus-slip relations of bars, accounting for the bond deterioration caused by cyclic slip reversals, the tensile yielding of the bars, and the splitting of concrete. The wedging action of the ribs is represented by assuming that the normal stress of the interface is proportional to the bond stress. The model has been implemented in a finite-element analysis program and has been validated with laboratory experiments that include monotonic and cyclic bond-slip and anchorage tests of bars with different embedment lengths and a test on an RC column subjected to cyclic lateral loading. The model is easy to calibrate and computationally efficient, and it accurately predicts the bond-slip behavior of bars embedded in well-confined concrete. It also simulates bond failure attributable to the splitting of concrete in an approximate manner.
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Acknowledgments
Funding for the research presented in this paper was provided by the California Department of Transportation (Caltrans) under Contract No. 59A0710. The authors would also like to thank Fundacio La Caixa and Fundacion Caja Madrid for the graduate fellowships provided to the first author. However, opinions expressed in this paper are those of the authors and do not necessarily reflect those of the sponsors.
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Published In
Journal of Structural Engineering
Volume 141 • Issue 4 • April 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Oct 25, 2013
Accepted: Mar 6, 2014
Published online: Jul 14, 2014
Discussion open until: Dec 14, 2014
Published in print: Apr 1, 2015
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