Finite element analysis of beams bonded with end-anchored FRP straps

C.Y. Zhou, C.F. Wang, R. Al-Mahaidi, Y.H. Qin

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Abstract

A concrete beam can be strengthened with fiber-reinforced polymer (FRP) straps attached to the tension surface. Stress concentration within the strap-end region may induce premature debonding failure, and this is one of the main disadvantages hindering this application. Experimental studies indicate that external end-anchor systems can delay or prevent end debonding. However, this technique needs to be thoroughly investigated prior to safe and widespread application. Firstly, this paper introduces a conceptual external end-anchor system. Then, a finite element (FE) analysis is done for a concrete beam strengthened with this system. Finally, results from the FE model and an analytical model are compared, and good agreement between them is observed. Both the numerical and analytical results indicate that an external end-anchor helps to mitigate stress concentration within the strap-end region.

Original languageEnglish
Title of host publicationProceedings of the 4th Asia-Pacfic Conference on FRP in Structures (APFIS 2013)
Subtitle of host publicationMelbourne Vic Australia; 11-13 December 2013
EditorsRiadh Al-Mahaidi, Scott T. Smith, Yu Bai, Xiao-Ling Zhao
Place of PublicationMelbourne Vic Australia
PublisherInternational Institute for FRP in Construction (IIFC)
Pages1-9
Number of pages9
ISBN (Electronic)9780987593016
Publication statusPublished - 2013
Externally publishedYes
EventAsia-Pacific Conference on FRP in Structures 2013 - Melbourne, Australia
Duration: 11 Dec 201313 Dec 2013
Conference number: 4th

Conference

ConferenceAsia-Pacific Conference on FRP in Structures 2013
Abbreviated titleAPFIS 2013
CountryAustralia
CityMelbourne
Period11/12/1313/12/13

Keywords

  • Bonded FRP straps
  • End anchor
  • Finite element analysis
  • Interfacial stresses
  • Mechanical anchor
  • Strengthening of beams

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