Intermediate crack-induced debonding in RC beams externally strengthened with prestressed FRP laminates

Wen Wei Wang, Jianguo Dai, Kent A. Harries

Research output: Journal article publicationJournal articleAcademic researchpeer-review

23 Citations (Scopus)

Abstract

Intermediate crack-induced debonding is often a dominant failure mode in fiber-reinforced polymer (FRP)-strengthened reinforced concrete (RC) beams in flexure. It has been extensively studied for RC beams externally strengthened with unstressed FRP laminates. However, very little work has been done on FRP debonding for RC beams strengthened with prestressed FRP. This article presents a sectional analysis model for predicting the flexural capacity of RC beams strengthened with prestressed FRP laminates with due consideration of different failure modes. The focus is placed on the effective strain in the prestressed FRP at the ultimate states of intermediate crack-induced debonding or rupture of debonded FRP. Through back-calculation analysis of 51 RC beams strengthened with post-tensioned FRP laminates, a model for predicting the effective strain of prestressed FRP for ultimate strength prediction based upon sectional analyses was developed and validated through comparisons with test results.
Original languageEnglish
Pages (from-to)1842-1857
Number of pages16
JournalJournal of Reinforced Plastics and Composites
Volume32
Issue number23
DOIs
Publication statusPublished - 1 Dec 2013

Keywords

  • fiber-reinforced polymer rupture
  • flexural strengthening
  • intermediate crack-induced debonding
  • Prestressed fiber-reinforced polymer
  • reinforced concrete beams

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Materials Chemistry

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