Innovative strengthening technique using post-tensioned fibre composite wraps for bridge headstocks
Article
Article Title | Innovative strengthening technique using post-tensioned fibre composite wraps for bridge headstocks |
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ERA Journal ID | 4156 |
Article Category | Article |
Authors | Aravinthan, T. (Author) and Heldt, T. (Author) |
Journal Title | Australian Journal of Structural Engineering |
Journal Citation | 11 (2), pp. 117-128 |
Number of Pages | 12 |
Year | 2010 |
Place of Publication | Canberra, Australia |
ISSN | 1328-7982 |
2204-2261 | |
Web Address (URL) | http://search.informit.com.au/fullText;dn=573933762309097;res=IELENG |
Abstract | Engineered fibre composites offer an extremely versatile option to strengthen existing structures to solve structural problems arising from environmental exposure, inadequate designs, increased traffic loads and continuous aging of existing structures. While the behaviour of structures by external post-tensioning using fibre composites for flexure is well understood, there is limited research on shear strengthening, specifically using prestressed fibre composites. An innovative system using fibre composites has been investigated for strengthening bridge headstocks with deficient structural performance. The innovative system uses fibre composite wraps which forms an infinite loop around the headstocks and together with anchorage blocks, these are pushed-out and the gap packed with a suitable spacer to maintain the applied pre-stressing force. This paper discusses the research, development and construction of this innovative fibre composite post-tensioning system and testing it on a model bridge headstocks in Tenthill Creek Bridge. Issues related to the effect of existing shear cracks and the importance of repairing such cracks will be discussed. With further investigation, this strengthening system could be implemented in actual structures to enhance the capacity of bridge headstocks. |
Keywords | fibre composites; fibre wraps; post-tension; shear strengthening; concrete; headstocks; bridges |
ANZSRC Field of Research 2020 | 400508. Infrastructure engineering and asset management |
400510. Structural engineering | |
401602. Composite and hybrid materials | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Centre of Excellence in Engineered Fibre Composites |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q10z6/innovative-strengthening-technique-using-post-tensioned-fibre-composite-wraps-for-bridge-headstocks
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