Size Effect on Inelastic Buckling Behavior of Accelerated Pitted Corroded Bars in Porous Media
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 7
Abstract
A total of 110 inelastic buckling tests on corroded and uncorroded reinforcing bars with various bar diameters are conducted. Through regression analyses of experimental data, the combined effect of nonuniform pitting corrosion and bar diameter (size effect) on buckling and postyield buckling response of corroded and uncorroded bars are investigated. The experimental result shows that bar diameter has a minor influence on postyield buckling response of uncorroded bars. However, it is found that bar diameter has a more significant impact on buckling capacity of corroded bars. Finally, the experimental data of tested corroded bars in this research are used to calibrate and update a new uniaxial material model of corroded bars to account for size effect. The proposed updated model simulates the inelastic buckling and postbuckling behavior of corroded bars accounting for size effect. This model is implemented in an open source finite element code and is readily available to the community for nonlinear analysis of corroded reinforced concrete structures.
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Acknowledgments
The author thanks Mr. Mehdi Bozorg for conducting the experimental testing of this research as part of his third year undergraduate research project at the University of Bristol laboratories.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 7 • July 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jun 24, 2016
Accepted: Oct 11, 2016
Published online: Mar 20, 2017
Published in print: Jul 1, 2017
Discussion open until: Aug 20, 2017
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