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Rehabilitation of deteriorated reinforced self-consolidating concrete brackets and corbels using CFRP composites: diagnosis and treatment

Rehabilitation of deteriorated reinforced self-consolidating concrete brackets and corbels using... Corbels can be considered as one of the important members in buildings, cranes, and bridge structures. Sometimes, it is necessary to upgrade corbels within a certain level of the service load to improve performance and increase the life of the structure. In some cases, like changes in use, design error, and degradation due to extreme weather conditions, the corbels need to be upgraded or strengthened. In the present work, a comparison between the performance of RC corbels that are strengthened or repaired using the externally bonded (EB) carbon fiber-reinforced polymer (CFRP) sheets is made. Specimens have been cast and tested under one-point static load with a/d = 0.95. Three levels of damage before upgrading are considered as: no damage, 0.45Po, and 0.65Po. It has been found that strengthening using the horizontal and diagonal configuration resulted in an improvement in capacity by 45%, while repairing beyond the damage level of 0.45Po, the respective value was 51%, and for 0.65Po damage level, the improvement was 54%. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

Rehabilitation of deteriorated reinforced self-consolidating concrete brackets and corbels using CFRP composites: diagnosis and treatment

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Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-022-00262-2
Publisher site
See Article on Publisher Site

Abstract

Corbels can be considered as one of the important members in buildings, cranes, and bridge structures. Sometimes, it is necessary to upgrade corbels within a certain level of the service load to improve performance and increase the life of the structure. In some cases, like changes in use, design error, and degradation due to extreme weather conditions, the corbels need to be upgraded or strengthened. In the present work, a comparison between the performance of RC corbels that are strengthened or repaired using the externally bonded (EB) carbon fiber-reinforced polymer (CFRP) sheets is made. Specimens have been cast and tested under one-point static load with a/d = 0.95. Three levels of damage before upgrading are considered as: no damage, 0.45Po, and 0.65Po. It has been found that strengthening using the horizontal and diagonal configuration resulted in an improvement in capacity by 45%, while repairing beyond the damage level of 0.45Po, the respective value was 51%, and for 0.65Po damage level, the improvement was 54%.

Journal

Journal of Building Pathology and Rehabilitation – Springer Journals

Published: Jun 1, 2023

Keywords: Damaged corbels; Strengthening; Rehabilitation; Rupture failure; Flexural toughness; Effective stiffness; Self-consolidating concrete

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