Theoretical Model for Fiber-Reinforced Polymer-Confined Concrete

Fiber-reinforced polymer (FRP) composites have found increasingly wide ranges of applications in civil engineering due to their high strength-to-weight ratio and high corrosion resistance. One important application of FRP composites is as confining material for concrete, particularly in strengthening or seismic retrofit of existing reinforced concrete columns by the provision of an FRP jacket. FRP confinement can significantly enhance both the compressive strength and ultimate strain of concrete. This paper presents a new stress–strain model for FRP-confined concrete in which responses of the concrete core and FRP jacket as well as their interaction are explicitly considered. Such a model is often referred to as an analysis-oriented model. The key novel feature of the proposed analysis-oriented model, compared to existing models of the same kind, is a more accurate and widely applicable lateral strain equation based on a careful interpretation of the lateral deformation characteristics of unconfined, actively confined, and FRP-confined concrete. Through comparisons with independent test data, the proposed model is shown to be accurate not only for FRP-confined concrete but also for concrete confined with a steel tube, demonstrating the model's wide applicability to concrete confined with different materials. The accuracy of the proposed model is also shown to be superior to existing analysis-oriented stress-strain models through comparisons with test data.

  • Availability:
  • Supplemental Notes:
    • Abstract reprinted with permission from ASCE
  • Authors:
    • Teng, J G
    • Huang, Y L
    • Lam, L
    • Ye, L P
  • Publication Date: 2007-3

Language

  • English

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Filing Info

  • Accession Number: 01046667
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 13 2007 12:33PM