Stress-strain behavior of concrete in hybrid frp-concrete-steel double-skin tubular columns

T. Yu, Jinguang Teng, Y. L. Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

82 Citations (Scopus)


Hybrid fiber-reinforced polymer (FRP) concrete-steel double-skin tubular columns are a new form of hybrid columns recently proposed by the second writer. The new column consists of an inner steel tube and an outer FRP tube, with the space between them filled with concrete. The new column possesses several advantages over existing columns including excellent ductility and corrosion resistance. This paper first examines the behavior of the confined concrete between the two tubes using a finite-element model to understand the effects of the key parameters including the stiffness of the FRP tube, the stiffness of the steel tube, and the size of the inner void. Based on the available experimental observations and the results from the finite-element model, a simple stress-strain model for the confined concrete is proposed for use in practical design. Comparisons with test results show that the proposed model provides reasonably accurate and conservative predictions.
Original languageEnglish
Pages (from-to)379-389
Number of pages11
JournalJournal of Structural Engineering
Issue number4
Publication statusPublished - 26 Mar 2010


  • Composite columns
  • Concrete
  • Fiber reinforced polymer
  • Fiber-reinforced polymer
  • Stress strain relations
  • Stress-strain relations

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

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