Rectangular steel tubes with timber infill and CFRP confinement under compression: experiments

Tohid Ghanbari Ghazijahani*, Hui Jiao, Damien Holloway

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


A new composite element comprising rectangular steel tubular sections filled with timber and confined with carbon fiber reinforced polymer (CFRP) was investigated in this study. Several tests were conducted on different specimens with varying geometrical conditions and the impact of each material was studied on the structural behavior of these members under axial compression. The timber infill was found to significantly improve the capacity by preventing local inward buckling. This effect was further enhanced when the short columns were confined with sufficient layers of CFRP to prevent local outward buckling. In both cases the strength increase (up to 75%) was substantially greater than the corresponding weight increase (up to 44%).

Original languageEnglish
Pages (from-to)196-203
Number of pages8
JournalJournal of Constructional Steel Research
Publication statusPublished - Nov 2015
Externally publishedYes


  • Stub columns
  • Rectangular hollow steel (RHS) tubes
  • CFRP
  • Timber (wood) infill
  • Axial compression


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