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01.12.2023 | Technical Paper

Structural behavior of severely corroded RC beams retrofitted with UHPC layer: an experimental study

verfasst von: Rajib Kumar Biswas, Takahiro Saito, Takashi Misawa, Mitsuyasu Iwanami

Erschienen in: Innovative Infrastructure Solutions | Ausgabe 12/2023

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Abstract

Corrosion of reinforcement bars in reinforced concrete (RC) structures is considered a major concern. This study examines the flexural response of severely corroded RC beams retrofitted with ultra-high-performance concrete (UHPC) layer. UHPC layers were attached to the concrete substrate in four different configurations to investigate whether they could strengthen severely corroded RC beams. To represent carbonation-induced uniform corrosion, artificial corrosion was adopted in this study by replacing the deformed bars with plain bars and reducing the cross-sectional area. The plain steel bars represented about 38% of rebar corrosion. Obtained results revealed that UHPC layers can remarkably enhance the structural performance when it comes to serviceability and ultimate limit state. The test results also revealed that RC beams retrofitted with the UHPC layer might be unable to improve the displacement capacity of the corroded RC beam owing to bond deterioration between the concrete and embedded rebars and reduced cross-sectional area.

Vorheriger Artikel Retraction Note: Investigation of bond-slip in reinforced steel rebar using concrete damage-plastic model

Nächster Artikel Improving criteria for two-story confined masonry building retrofitted by shear wall

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Titel: Structural behavior of severely corroded RC beams retrofitted with UHPC layer: an experimental study
verfasst von: Rajib Kumar Biswas
Takahiro Saito
Takashi Misawa
Mitsuyasu Iwanami
Publikationsdatum: 01.12.2023
Verlag: Springer International Publishing
Erschienen in: Innovative Infrastructure Solutions / Ausgabe 12/2023
Print ISSN: 2364-4176
Elektronische ISSN: 2364-4184
DOI: https://doi.org/10.1007/s41062-023-01295-3

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