Experimental Investigation of the Contribution of Bonded C-FRP Jackets to Shear Capacity of RC Beams

This paper addresses the issue of the shear capacity of concrete elements with T Cross-section strengthened externally by applied epoxy bonded Carbon Fiber Reinforced Polymer (C-FRP) jackets. The experimental program includes four beams constructed and tested for this purpose. Two of them were rectangular cross-sections and two were T-beams. One specimen pf each pair was strengthened with bonded C-FRP jackets. The rectangular one was totally wrapped around the cross-section and in the case of the T-beam C-FRP jackets wrapped the vertical side and the width of the web (U-jacket). All beams were tested in monotonic increased loading until total failure. The strengthened beams exhibited an increase of the maximum shear strength equal to 300% for the totally wrapped rectangular concrete member and 39% for the U-wrapped T-beam in respect to the corresponding non-strengthened beams. The strengthened beam with slab (T-beam) exhibited shear diagonal cracks and quite brittle shear failure. Premature debonding failure at the concrete—C-FRP adhesive was observed. On the contrary the entire shear performance of the strengthened rectangular beam was substantially improved in comparison to the non-strengthened rectangular one and it exhibited flexural and rather ductile response while failure finally appeared at a high level of loading and deformation along with C-FRP jackets rupture.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 689-696
  • Monograph Title: Role of Concrete in Sustainable Development

Subject/Index Terms

Filing Info

  • Accession Number: 01010844
  • Record Type: Publication
  • ISBN: 0727732471
  • Files: TRIS
  • Created Date: Nov 29 2005 1:59PM