Factors Affecting the Ultimate Condition of FRP-Wrapped Concrete Columns

J. F. Chen*, S. Q. Li, L. A. Bisby

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Fiber reinforced polymer (FRP)-wrapped circular concrete columns under axial compression usually fail as a result of FRP rupture in the hoop direction. The average measured hoop strain in the FRP jacket at failure of such columns, i.e., the apparent FRP rupture strain, is typically considerably lower than the ultimate tensile strain obtained from tensile tests of flat coupons. A large scatter also exists in the measured rupture strains over the surface of an FRP-wrapped column at ultimate failure. No rational model based on sound theories is currently available to explicitly consider the reduction of the apparent FRP rupture strain in design. This paper discusses the possible failure modes of FRP-wrapped concrete columns and the factors that may play a role in the initiation of failure. Further research needs and the possible consequences for the optimized design of FRP-wrapped concrete columns are discussed.

Original languageEnglish
Pages (from-to)67-78
Number of pages12
JournalJournal of Composites for Construction
Volume17
Issue number1
DOIs
Publication statusPublished - Feb 2013

Keywords

  • Fiber reinforced polymer
  • Retrofitting
  • Concrete columns
  • Fracture
  • Three dimensional analysis
  • Confinement
  • POLYMER-CONFINED CONCRETE
  • STRESS-STRAIN MODEL
  • UNIFIED STRENGTH MODEL
  • UNIAXIAL COMPRESSION
  • FIBER ORIENTATION
  • JACKETED CONCRETE
  • BEHAVIOR
  • CYLINDERS
  • COMPOSITE
  • TUBES

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