Experimental Study and Analytical Model of Concrete Cover Spalling Induced by Steel Corrosion

AbstractConcrete 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 we...

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Bibliographic Details
Published in:Journal of structural engineering (New York, N.Y.) N.Y.), 2020-06, Vol.146 (6)
Main Authors: Zhao, Y. X, Wang, Y. Z, Dong, J. F
Format: Article
Language:English
Subjects:
Bending moments
Concrete
Concrete blocks
Concrete structures
Corrosion
Corrosion resistant steels
Defects
Mathematical analysis
Spalling
Structural engineering
Structural safety
Technical Papers
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Summary:AbstractConcrete 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.
ISSN:0733-9445
1943-541X
DOI:10.1061/(ASCE)ST.1943-541X.0002647