Cyclic compressive behavior and load–strain model of FRP–concrete​ double tube composite columns

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)


A novel fiber-reinforced polymer (FRP)–concrete double tube composite column, consisting of an outer filament winding FRP tube, an inner pultruded FRP tube and infilled core concrete and ring concrete, has been proposed and experimentally investigated under monotonic compression by the authors. It exhibited obviously improved deformability than the traditional FRP-confined concrete columns. In this study, cyclic compression tests were conducted on the composite column to examine its structural behavior under cyclic loadings. Effects of different outer and inner FRP tube thicknesses and ring concrete types were investigated. Failure modes, cyclic load–strain responses and hoop strain behavior were presented and analyzed. Cyclic load–strain model, including the envelope model, unloading and reloading models, plastic strain equation and stress deterioration equation, was proposed to predict the cyclic compressive behavior of the FRP–concrete double tube composite columns. The proposed model was verified against the test results and exhibited good performance.

Original languageEnglish
Article number110515
JournalThin-Walled Structures
Publication statusPublished - Mar 2023


  • Cyclic compression
  • Cyclic load–strain model
  • Double tube
  • FRP–concrete
  • Hoop strain
  • Ultimate axial strain

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering


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