Structural behavior of CFRP strengthened concrete-filled steel tubes columns under axial compression loads

Jai Woo Park, Sung Mo Choi

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

This paper presents the structural behavior of CFRP (carbon fiber reinforced polymer) strengthened CFT (concrete-filled steel tubes) columns under axial loads. Circular and square specimens were selected to investigate the retrofitting effects of CFRP sheet on CFT columns. Test parameters are cross section of CFT, D/t (B/t) ratios, and the number of CFRP layers. The load and ductility capacities were evaluated for each specimen. Structural behavior comparisons of circular and rectangular section will be represented in the experimental result discussion section. Finally, ultimate load formula of CFRP strengthened CFT will be proposed to calculate the ultimate strength of CFRP strengthened circular CFT. The prediction values are in good agreement with the test results obtained in this study and in the literature.

Original languageEnglish
Pages (from-to)453-472
Number of pages20
JournalSteel and Composite Structures
Volume14
Issue number5
DOIs
StatePublished - May 2013

Keywords

  • Carbon fiber sheet
  • Composite column
  • Concrete-filled steel tubes (CFT)
  • Confinement effect
  • FRP

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