FLEXURAL BEHAVIOR OF CONCRETE BEAMS REINFORCED WITH GLASS FIBER-REINFORCED POLYMER (GFRP) BARS

Concrete members reinforced with glass fiber-reinforced polymer (GFRP) bars exhibit large deflections and crack widths compared with concrete members reinforced with steel. This is due to the low modulus of elasticity of GFRP. Current design methods for predicting deflections at service load and crack widths developed for concrete structures reinforced with steel may not be used for concrete structures reinforced with GFRP. This paper presents methods for predicting deflections and crack widths in beams reinforced with GFRP. To use the effective moment of inertia for concrete beams reinforced with GFRP bars, the effect of the FRP reinforcement ratios and elastic modulus of FRP were incorporated in the exponent of Branson's equation. In addition, an equation based on flexural stiffness of GFRP reinforced concrete was developed to predict deflections. Based on this investigation and past studies, a theoretical correlation for predicting crack width was proposed. Six concrete beams reinforced with different GFRP reinforcement ratios were tested. Their measured deflections and crack widths were compared with the proposed models. The experimental results compared favorably with those predicted by the models.

• Record URL:
  http://www.concrete.org/Publications/InternationalConcreteAbstractsPortal.aspx.aspx?m=details&i=8806
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846957
• Supplemental Notes:
  • Financial support was provided by the National Science Foundation CAREER Grant No. CMS-9796326.
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Toutanji, H A
  • Saafi, M
• Publication Date: 2000-9

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 712-719
• Serial:
  • ACI Structural Journal
  • Volume: 97
  • Issue Number: 5
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-3241
  • Serial URL: http://www.concrete.org/PUBS/JOURNALS/SJHOME.ASP

Subject/Index Terms

• TRT Terms: Beams; Bearing capacity; Cracking; Deflection; Design methods; Experiments; Failure; Fiber reinforced plastics; Flexural strength; Flexure; Glass fibers; Longitudinal reinforcement; Mathematical models; Modulus of elasticity; Moments of inertia; Polymers; Reinforced concrete; Reinforcement (Engineering); Reinforcing bars; Stiffness; Structural members
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00798536
• Record Type: Publication
• Contract Numbers: CMS-9796326, 573-1-24-95
• Files: TRIS
• Created Date: Sep 29 2000 12:00AM