Strengthening of bridge headstocks with external post-tensioning: design issues and strengthening techniques
Paper
Paper/Presentation Title | Strengthening of bridge headstocks with external post-tensioning: design issues and strengthening techniques |
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Presentation Type | Paper |
Authors | Aravinthan, Thiru (Author) and Heldt, Tim (Author) |
Journal or Proceedings Title | New Technology - More Options |
Number of Pages | 10 |
Year | 2005 |
Place of Publication | Brisbane, Australia |
Conference/Event | Road System and Engineering Technology Forum (2005) |
Event Details | Road System and Engineering Technology Forum (2005) Event Date 09 to end of 11 Aug 2005 Event Location Brisbane, Australia |
Abstract | There has been a need to strengthen headstocks in bridges due to increased traffic loading and aging bridges. External post-tensioning is a viable solution for such strengthening. While the behaviour of structures strengthening by external post-tensioning for flexure is well understood, there is limited knowledge on the shear strengthening. In this paper, the application of external post-tensioning for shear strengthening of headstocks using conventional prestressing techniques will be discussed. Moreover, an innovative solution developed by the authors using externally prestressed fibre wraps will be presented. Issues related to the effect of existing shear cracks and the importance of repairing such cracks will be discussed, based on the results of model tests on the headstocks in Tenthill Creek Bridge. |
Keywords | post-tensioning; headstock; shear cracks; external prestressing; fibre reinforced plastic (FRP); concrete |
ANZSRC Field of Research 2020 | 401001. Engineering design |
400510. Structural engineering | |
401602. Composite and hybrid materials | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Centre of Excellence in Engineered Fibre Composites |
Fibre Composites Design and Development |
https://research.usq.edu.au/item/9x955/strengthening-of-bridge-headstocks-with-external-post-tensioning-design-issues-and-strengthening-techniques
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