Finite Element Modeling of Large Rupture Strain (LRS) FRP-Confined Concrete Columns

Mohammadi M., Bai Y., Dai J.

10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE), İstanbul, Turkey, 8 - 10 December 2021, vol.198, pp.632-639 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 198
  • Doi Number: 10.1007/978-3-030-88166-5_54
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.632-639
  • Keywords: Large rupture strain (LRS), FRP, Confinement, Finiate element modeling, Plasticity, PLASTIC-DAMAGE MODEL
  • Istanbul Technical University Affiliated: No


Extensive studies have demonstrated that confining a concrete column by large rupture strain fiber reinforced polymer (LRS FRP) composites can increase significantly its ultimate axial strength and ductility. For finite element analysis of such passively confined concrete columns by plasticity-based approaches, the plastic dilation angle must be quantified. For LRS-FRP confined concrete column, by increasing the lateral strain, the rate of confinement pressure is nonlinear compared to the linear rate provided by conventional FRPs (i.e., carbon FRP, glass FRP and aramid FRP), due to the bilinear tensile stress-strain nature of the LRS FRP material. This will cause the dilation behavior of LRS-FRP confined concrete to be substantially different from that of conventional FRP confined concrete columns.