Confinement of concrete columns with large rupture strain FRP composites

N. Sirach, S. T. Smith, T. Yu, A. Mostafa, Z. S. Tang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


Fibre-reinforced polymer (FRP) composites can be used as a confinement mechanism to improve the strength and ductility of concrete columns. In recent years, a number of large rupture strain (LRS) FRP composites have emerged, namely polyethylene naphthalate (PEN) and polyethylene terephthalate (PET), and they are a promising solution for the seismic retrofitting of reinforced concrete (RC) columns. These composites are desirable as they are made from recycled plastic bottles, making them a cheaper and more environmentally friendly alternative to traditional FRPs (i.e. carbon FRP and glass FRP). This paper presents an experimental study on the axial compressive behavior of LRS FRPconfined normal-strength concrete columns. The effect of FRP layers on the stress-strain behavior of these columns is investigated. Furthermore, several tests on traditional FRP-confined columns were tested in parallel and these results are used to make comparisons to those LRS FRP-confined columns. Results show that LRS FRP-confined columns achieve a similar ultimate strength and significantly higher ultimate strains to their traditional FRP counterpart when the confining ratio is similar.

Original languageEnglish
Title of host publicationAPFIS 2019 Proceedings - 7th Asia-Pacific Conference on FRP in Structures
EditorsScott T. Smith, Tao Yu, Dilum Fernando, Zhenyu Wang
PublisherAPFIS Conference Series
ISBN (Electronic)9780648752899
Publication statusPublished - 1 Dec 2019
Externally publishedYes
Event7th Asia-Pacific Conference on FRP in Structures, APFIS 2019 - Brisbane, Australia
Duration: 10 Dec 201913 Dec 2019

Publication series

NameAPFIS 2019 Proceedings - 7th Asia-Pacific Conference on FRP in Structures


Conference7th Asia-Pacific Conference on FRP in Structures, APFIS 2019


  • Concrete
  • Confinement
  • Experimental study
  • FRP
  • Large rupture strain

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)

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