Effects of existing shear damage on externally post tensioned repair of bent caps
Article
Article Title | Effects of existing shear damage on externally post tensioned repair of bent caps |
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ERA Journal ID | 36383 |
Article Category | Article |
Authors | Aravinthan, Thiru (Author) and Suntharavadivel, T. G. (Author) |
Journal Title | Journal of Structural Engineering |
Journal Citation | 133 (11), pp. 1662-1669 |
Number of Pages | 20 |
Year | 2007 |
Place of Publication | Reston, VA, USA |
ISSN | 0733-9445 |
1943-541X | |
Digital Object Identifier (DOI) | https://doi.org/10.1061/(ASCE)0733-9445(2007)133:11(1662) |
Abstract | [Abstract]: External post-tensioning can be considered an effective strengthening method for bridge members, which are deteriorating due to extreme loading conditions and progressive structural aging. The effects of existing shear cracks in bent caps strengthened by external post-tensioning were experimentally investigated using model specimens. Initial investigation revealed that the shear capacity of a bent cap is not enhanced by external post-tensioning only, when shear cracks exist. Moreover, it was found that the repair of existing cracks using epoxy injection substantially increases the shear capacity of the bent cap. The Tenthill Creek Bridge in South East Queensland, Australia provides a case study where the bent caps have been strengthened by external post-tensioning. The model tests of the bridge bent caps confirmed the initial findings on the effects of existing shear cracks on the shear capacity. The experimental results emphasize the need for appropriate repair of existing shear cracks prior to strengthening by external post-tensioning to enhance the shear capacity of bent caps. |
Keywords | prestressing, shear strength, cracking, rehabilitation, epoxy compounds |
ANZSRC Field of Research 2020 | 400508. Infrastructure engineering and asset management |
400504. Construction engineering | |
400510. Structural engineering | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Centre of Excellence in Engineered Fibre Composites |
https://research.usq.edu.au/item/9y7w5/effects-of-existing-shear-damage-on-externally-post-tensioned-repair-of-bent-caps
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