Effects of Corrosion on Stress–Strain Behavior of Confined Concrete
Publication: Journal of Structural Engineering
Volume 147, Issue 7
Abstract
An analytical model is proposed to predict the stress–strain relationship of confined concrete subjected to reinforcement corrosion. The stress–strain graph of confined concrete with corroded reinforcement was predicted using estimation of four key parameters: maximum compressive stress, strain at maximum compressive stress, modulus of elasticity of concrete, and ultimate compressive strain of concrete. To validate the model, analytically predicted stress–strain curves of confined concrete of circular RC columns damaged due to corroded reinforcement were compared with those obtained from full-scale experimental tests with varying degrees of corrosion. The results of the comparison indicate good agreement. The RC columns had identical size, the same longitudinal steel reinforcement and spiral confinement type but with different spiral pitches providing varying levels of confinement. The corroded RC columns were categorized into four corrosion groups: noncorroded, low corrosion, high corrosion, and mechanical pitting corroded. The presented model is based on a modified version of the Mander’s universal model for RC columns.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request. The available items include photos and videos from different experimental phases, and recorded force-displacement of tested specimens.
Acknowledgments
The research program was supported by the Natural Hazards Research Platform (NHRP), project “Advanced Bridge Construction and Design for New Zealand (ABCD—NZ Bridges),” 2011–2015, and the QuakeCore partially cofunded the final year Ph.D. study of Kaveh Andisheh. The authors also acknowledge the technicians at the Structures Laboratory at the University of Canterbury for their contribution.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 7 • July 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Apr 15, 2020
Accepted: Jan 12, 2021
Published online: Apr 23, 2021
Published in print: Jul 1, 2021
Discussion open until: Sep 23, 2021
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