Bending and shear behaviour of waste rubber concrete-filled frp tubes with external flanges

Wahid Ferdous, Allan Manalo, Omar S. Alajarmeh, Yan Zhuge, Ali A. Mohammed, Yu Bai, Thiru Aravinthan, Peter Schubel

Research output: Contribution to journalArticleResearchpeer-review

11 Citations (Scopus)


An innovative beam concept made from hollow FRP tube with external flanges and filled with crumbed rubber concrete was investigated with respect to bending and shear. The performance of the rubberised-concrete-filled specimens was then compared with hollow and normal-concrete-filled tubes. A comparison between flanged and non-flanged hollow and concrete-filled tubes was also implemented. Moreover, finite element simulation was conducted to predict the fundamental behaviour of the beams. The results showed that concrete filling slightly improves bending performance but significantly enhances the shear properties of the beam. Adding 25% of crumb rubber in concrete marginally affects the bending and shear performance of the beam when compared with normal-concrete-filled tubes. Moreover, the stiffness-to-FRP weight ratio of a hollow externally flanged round tube is equivalent to that of a concrete-filled non-flanged round tube. The considera-tion of the pair-based contact surface between an FRP tube and infill concrete in linear finite element modelling predicted the failure loads within a 15% margin of difference.

Original languageEnglish
Article number2500
Number of pages18
Issue number15
Publication statusPublished - 29 Jul 2021


  • Bending and shear properties
  • Composite structures
  • Crumbed rubber concrete
  • Externally flanged-tube
  • Hollow and concrete-filled tubes
  • Waste tyres

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