Experimental Study and Analytical Model of Concrete Cover Spalling Induced by Steel Corrosion
Publication: Journal of Structural Engineering
Volume 146, Issue 6
Abstract
Concrete cover spalling induced by steel corrosion is generally assumed to be the limit state of concrete structures when considering their structural safety. A new method for testing the resisting bending moment in a spalling concrete block is proposed in this paper. Spalling experiments were conducted on six beams after being subjected to simultaneous sustained loads and accelerated corrosion, and the resisting bending moments in the spalling concrete block were measured. Two spalling mode types were identified, and the spalling bending moment was found to be negatively related to the crack widths. Based on the experimental results, an analytical model was preliminarily established to determine the resisting bending moment in a spalling concrete block of corroded beams, and the results indicate that the predictions from the analytical model exhibit reasonable agreement with the experimental data. According to the experimental results and analytical model, a criterion for predicting concrete cover spalling is proposed.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The financial support received from the National Key Research and Development Program of China (2016YFC0701406) is gratefully acknowledged.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 6 • June 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Dec 25, 2018
Accepted: Nov 14, 2019
Published online: Mar 30, 2020
Published in print: Jun 1, 2020
Discussion open until: Aug 30, 2020
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