Shear Strengthening of T Cross Section Reinforced Concrete Beams by Near-Surface Mounted Technique

With the aim of evaluating the influence of both the percentage and inclination of carbon fiber-reinforced polymer (CFRP) laminates on the effectiveness of the near-surface mounted technique for shear strengthening of reinforced concrete T beams, an experimental program was conducted using 3 percentages of laminates and, for each one, 3 inclinations: 90, 60, and 45°. The CFRP-strengthened beams had a steel stirrup reinforcement ratio of 0.1%. The highest CFRP percentage was designed to provide a maximum load similar to the one of a reference beam reinforced with a steel stirrup reinforcement ratio equal to 0.24%. Although these beams have had a similar maximum load, the beams with CFRP presented higher stiffness. Laminates at 60° were the most effective shear strengthening configuration, having provided a maximum increase in the load capacity of 33%. The contribution of the CFRP strengthening systems was limited by the concrete tensile strength. Below certain spacing between laminates, a group effect occurs due to the interference between consecutive concrete failure surfaces, leading to the detachment of 2 lateral walls from the underlying beam core.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10900268
• Supplemental Notes:
  • Abstract reprinted with permission from ASCE
• Authors:
  • Dias, Salvador J E
  • Barros, Joaquim A O
• Publication Date: 2008-5

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 300-311
• Serial:
  • Journal of Composites for Construction
  • Volume: 12
  • Issue Number: 3
  • 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; Concrete structures; Fiber reinforced materials; Laminates; Reinforced concrete; Shear strength; Structural members; Structural strengthening; T beams
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01103037
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 24 2008 7:42AM