SHEAR STRENGTHENING OF REINFORCED CONCRETE BEAMS USING CARBON-FIBER-REINFORCED POLYMER LAMINATES

Shear failure is catastrophic and occurs usually without advance warning; thus it is desirable that the beam fails in flexure rather than in shear. Many existing reinforced concrete (RC) members are found to be deficient in shear strength and need to be repaired. Externally bonded reinforcement such as carbon-fiber-reinforced polymer (CFRP) provides an excellent solution in these situations. To investigate the shear behavior of RC beams with externally bonded CFRP shear reinforcement, 11 RC beams without steel shear reinforcement were cast at the concrete laboratory of the New Jersey Institute of Technology. After the beams were kept in the curing room for 28 days, carbon-fiber strips and fabrics made by Sika Corporation were applied on both sides of the beams at various orientations with respect to the axis of the beam. All beams were tested on a 979 kN (220 kips) MTS testing machine. Results of the test demonstrate the feasibility of using an externally applied, epoxy-bonded CFRP system to restore or increase the shear capacity of RC beams. The CFRP system can significantly increase the serviceability, ductility, and ultimate shear strength of a concrete beam; thus, restoring beam shear strength by using CFRP is a highly effective technique. An analysis and design method for shear strengthening of externally bonded CFRP has been proposed.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10900268
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Zhang, Z
  • Hsu, C-TT
• Publication Date: 2005-3

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 158-169
• Serial:
  • Journal of Composites for Construction
  • Volume: 9
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0268
  • EISSN: 1943-5614
  • Serial URL: http://ascelibrary.org/journal/jccof2

Subject/Index Terms

• TRT Terms: Carbon fibers; Ductility; Fiber reinforced plastics; Flexural strength; Jacketing (Strengthening); Laminates; Reinforced concrete; Serviceability; Shear properties; Shear strength
• Subject Areas: Design; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00988894
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 4 2005 12:00AM