Bond Behavior of the ETS FRP Bar Shear-Strengthening Method

The embedded through-section (ETS) technique was recently developed to avoid the debonding failure that occurs with other fiber-reinforced polymer (FRP) strengthening techniques, such as the externally bonded (EB) and near-surface-mounted (NSM) methods. The method offers greater confinement and leads, therefore, to a substantial improvement in bond performance. In addition, it requires less concrete preparation than the EB strengthening technique. In this study, experimental results from 13 direct-shear test specimens are reported. The influence of the following major parameters on the bond behavior of FRP-strengthened reinforced concrete beams is examined: concrete strength, hole diameter, bar diameter, bar surface area, and bar bond length. The experimental results show that debonding can be avoided by providing a sufficient bar length and high concrete strength. Among the analytical models suggested in the literature for the bond behavior of FRP reinforced concrete, the Eligehausen, Popov, and Bertero (BPE) modified model and the Cosenza, Manfredi, and Realfonzo (CMR) model are compared with the experimental results obtained here. The CMR model with new fitting parameters is found to be an accurate way of simulating the experimental results. A new equation that accounts for concrete compressive strength and bar diameter is provided to estimate the development length.

• Record URL:
  https://doi.org/10.1061/(ASCE)CC.1943-5614.0000280
• Record URL:
  http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29CC.1943-5614.0000280
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10900268
• Supplemental Notes:
  • © 2012. American Society of Civil Engineers
• Authors:
  • Godat, A
  • L'Hady, A
  • Chaallal, O
  • Neale, K
• Publication Date: 2012-10

Language

• English

Media Info

• Media Type: Digital/other
• Features: References;
• Pagination: pp 529-539
• Serial:
  • Journal of Composites for Construction
  • Volume: 16
  • Issue Number: 5
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0268
  • EISSN: 1943-5614
  • Serial URL: http://ascelibrary.org/journal/jccof2

Subject/Index Terms

• TRT Terms: Bars (Building materials); Bonding; Fiber reinforced polymers; High strength; Mathematical models; Parametric analysis; Shear strength; Strengthening (Maintenance)
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I30: Materials;

Filing Info

• Accession Number: 01450265
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Oct 25 2012 9:19AM