Precracked Reinforced Concrete T-Beams Repaired in Shear with Prestressed Carbon Fiber-Reinforced Polymer Straps

Samir Dirar, Janet M. Lees, Chris Morley

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)
422 Downloads (Pure)

Abstract

The results of an experimental and numerical investigation involving unstrengthened reinforced concrete (RC) T-beams and precracked RC T-beams strengthened in shear with prestressed carbon fiber-reinforced polymer (CFRP) straps are presented and discussed. The results provide insights into the influence of load history and beam depth on the structural behavior of both unstrengthened and strengthened beams. The strengthened beams exhibited capacity enhancements of 21.6 to 46% compared to the equivalent unstrengthened beams, demonstrating the potential effectiveness of the prestressed CFRP strap system. Nonlinear finite element (FE) predictions, which incorporated the load history, reproduced the observed experimental behavior but either underestimated or overestimated the post-cracking stiffness of the beams and strap strain at higher load levels. These limitations were attributed to the concrete shear models used in the FE analyses.
Original languageEnglish
Article number110-S71
Pages (from-to)855-866
Number of pages12
JournalACI Structural Journal
Volume110
Issue number5
DOIs
Publication statusPublished - 1 Sep 2013

Keywords

  • beam
  • fiber-reinforced polymer
  • finite element
  • precracking
  • shear
  • straps
  • strengthening

ASJC Scopus subject areas

  • Civil and Structural Engineering

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