Precracked Reinforced Concrete T-Beams Repaired in Shear with Bonded Carbon Fiber-Reinforced Polymer Sheets

Samir Dirar, J Lees, C Morley

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)
416 Downloads (Pure)

Abstract

This study investigates the structural behavior of precracked reinforced concrete (RC) T-beams strengthened in shear with externally bonded carbon fiber-reinforced polymer (CFRP) sheets. It reports on seven tests on unstrengthened and strengthened RC T-beams, identifying the influence of load history, beam depth, and percentage of longitudinal steel reinforcement on the structural behavior The experimental results indicate that the contributions of the external CFRP sheets to the shear force capacity can be significant and depend on most of the investigated variables. This study also investigates the accuracy of the prediction of the fiber-reinforced polymer (FRP) contribution in ACI 440.2R-08, UK Concrete Society TR55, and fib Bulletin 14 design guidelines for shear strengthening. A comparison of predicted values with experimental results indicates that the guidelines can overestimate the shear contribution of the externally bonded FRP system.
Original languageEnglish
Article number109-S20
Pages (from-to)215-224
Number of pages10
JournalACI Structural Journal
Volume109
Issue number2
Publication statusPublished - 1 Mar 2012

Keywords

  • strengthening
  • fiber-reinforced polymer
  • reinforced concrete
  • precracking
  • shear
  • beam

ASJC Scopus subject areas

  • Civil and Structural Engineering

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