Material Model Incorporating Buckling of Reinforcing Bars in RC Columns
Publication: Journal of Structural Engineering
Volume 140, Issue 1
Abstract
An efficient material model was developed for reinforcing steel in reinforced concrete (RC) columns that implicitly incorporates the degrading effects of bar-buckling. Utilizing the beam-on-springs model developed by the writers to characterize a buckling bar in a RC column, a comprehensive parametric study was performed to identify the effects of several important column parameters on the buckling behavior of the longitudinal reinforcement in RC columns. Features of average stress-strain curves of compressively loaded reinforcing bars are summarized. Constitutive relations as functions of critical column parameters were developed for direct use in fiber-section model-based nonlinear analysis of RC structures. Comparison of the numerically simulated global response of experimentally tested RC columns confirm the validity and utility of the proposed material model as a simple and effective way to include bar-buckling effects in inelastic analysis of RC frame structures.
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Acknowledgments
This paper was partially supported by the Earthquake Engineering Research Centers Program of the National Science Foundation under award number EEC-9701568 through the Pacific Earthquake Engineering Research (PEER) Center. Any opinions, findings, and conclusion or recommendations expressed in this material are those of the writers and do not necessarily reflect those of the National Science Foundation.
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Information
Published In
Journal of Structural Engineering
Volume 140 • Issue 1 • January 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Aug 14, 2012
Accepted: Jan 28, 2013
Published online: Jan 30, 2013
Published in print: Jan 1, 2014
Discussion open until: Feb 23, 2014
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