Challenges in shear strengthening using FRP strips

Daniel A. Kuchma, Adbeldjelil Belarbi, Sang Wook Bae, Michael Murphy

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The effective use of Fiber Reinforced Polymer (FRP) strips for shear strengthening remains a challenge for many applications. This assessment is based on the review of more than 500 beam shear tests in which externally bonded FRP strips were used for strengthening. These tests include a series of 31 new experiments by the authors on large reinforced concrete tee-beams and on prestressed concrete bulb-tee bridge girders. This new experimental research examined the influence of steel transverse reinforcement, pre-cracking, anchorage, FRP rigidity, size, and other factors on the effective strain in the FRP reinforcement to consider in calculating the contribution of this reinforcement. This paper provides a critical review of all acquired test data and then makes a comparative evaluation of 21 relationships that were developed by researchers and/or are used in codes-of-practice to account for the shear strength provided by FRP reinforcement. The result of this examination revealed the strong dependency of FRP effectiveness on beam test details, the difficulty in providing shear strengthening for prestressed bridge beams, and the wide variation in shear strength that is predicted by relationships that have been proposed for this purpose.

Original languageEnglish
Title of host publicationfib Symposium PRAGUE 2011
Subtitle of host publicationConcrete Engineering for Excellence and Efficiency, Proceedings
EditorsVlastimil Sruma
PublisherCzech Concrete Society
Pages1157-1160
Number of pages4
ISBN (Electronic)9788087158296
StatePublished - 2011
Eventfib Symposium PRAGUE 2011: Concrete Engineering for Excellence and Efficiency - Praha, Czech Republic
Duration: Jun 8 2011Jun 10 2011

Publication series

Namefib Symposium PRAGUE 2011: Concrete Engineering for Excellence and Efficiency, Proceedings
Volume2

Conference

Conferencefib Symposium PRAGUE 2011: Concrete Engineering for Excellence and Efficiency
CountryCzech Republic
CityPraha
Period06/8/1106/10/11

Keywords

  • Concrete
  • Design
  • FRP
  • Shear
  • Strengthening

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