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Article

Assessment of Mechanical Properties of Corroded Prestressing Strands

A Department of Civil and Environmental Engineering, Chung-Ang University, Seoul 06974, Korea
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Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(12), 4055; https://doi.org/10.3390/app10124055
Received: 19 May 2020 / Revised: 10 June 2020 / Accepted: 10 June 2020 / Published: 12 June 2020
The corrosion of prestressing steel in prestressed concrete bridges is a critical issue for bridge maintenance. To assess structures with corroded strands, it is necessary to define the mechanical properties of the strands and their influence on the structural behavior. In this study, corroded strands were taken from external tendons in existing post-tensioned concrete bridges and tested to determine the effects of corrosion on their tensile properties. Empirical equations for the tensile strength and ductility of the corroded strands were proposed using test results. The most corroded wire governs the mechanical properties of the strand. Experiments on prestressed concrete beams with a single corroded strand were conducted to investigate their structural behavior. A reduction in the flexural strength and maximum deformation was observed in these experiments. According to the section loss of a wire in a strand and its location in a beam, the flexural capacity can be evaluated using the proposed equation. The reduced ultimate strain of the corroded strand can be the governing factor of the flexural strength. View Full-Text
Keywords: corrosion; prestressed concrete bridge; prestressing steel; section loss; strength; ductility corrosion; prestressed concrete bridge; prestressing steel; section loss; strength; ductility
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MDPI and ACS Style

Jeon, C.-H.; Nguyen, C.D.; Shim, C.-S. Assessment of Mechanical Properties of Corroded Prestressing Strands. Appl. Sci. 2020, 10, 4055. https://doi.org/10.3390/app10124055

AMA Style

Jeon C-H, Nguyen CD, Shim C-S. Assessment of Mechanical Properties of Corroded Prestressing Strands. Applied Sciences. 2020; 10(12):4055. https://doi.org/10.3390/app10124055

Chicago/Turabian Style

Jeon, Chi-Ho, Cuong D. Nguyen, and Chang-Su Shim. 2020. "Assessment of Mechanical Properties of Corroded Prestressing Strands" Applied Sciences 10, no. 12: 4055. https://doi.org/10.3390/app10124055

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