Effect of bond in the development length of CFRP pretensioned beams

Eleni Toumpanaki, Janet M Lees, Giovanni Terrasi

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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Abstract

Carbon Fibre Reinforced Polymer (CFRP) tendons present an alternative material that can mitigate steel corrosion problems in concrete bridges. The use of CFRP prestress tendons can result in more durable prestressed concrete structures. However, the potential matrix plasticisation of CFRP tendons in humid environments and their inherent lack of ductility need to be considered in the design process. A tension stiffening analysis is undertaken to study the effect of variations in bond strength parameters on the cracking behaviour, deformability and structural performance of CFRP prestressed beams. The bond strength scenarios under consideration reflect either low or high bond conditions. The former could be associated with epoxy plasticisation and bond degradation due to moisture ingress at a crack location. A low bond performance results in a smaller number of cracks and higher deflections at failure compared with high bond tendons.
Original languageEnglish
Title of host publicationIABSE Symposium Guimaraes 2019
Subtitle of host publicationTowards a Resilient Built Environment Risk and Asset Management
ISBN (Electronic)978-3-85748-163-5
Publication statusAccepted/In press - 14 Feb 2019
EventIABSE Symposium Guimarães 2019: Towards a Resilient Built Environment - Risk and Asset Management - Guimarães , Portugal
Duration: 27 Mar 201929 Mar 2019
Conference number: 41
http://iabse.org/IABSE/Press_Releases/Guimaraes2019_FI.aspx

Conference

ConferenceIABSE Symposium Guimarães 2019
Abbreviated titleIABSE 2019
CountryPortugal
CityGuimarães
Period27/03/1929/03/19
Internet address

Keywords

  • Composites
  • Concrete
  • Long-term effects
  • Durability
  • Deformability

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