TAILORED PERFORMANCE AND DURABILITY OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH FRP PLATES

The introduction of fiber reinforced plastics (FRP) to the bridge engineering community over the last 20 years has given state and local transportation agencies another tool for repair of deficient bridges. FRP can be externally applied to concrete bridge members with adhesives with relative ease (as compared to steel plates) to increase a member's resistance to flexure or shear. Some disadvantages of using FRP for strengthening are the relative expense of FRP materials (which can be offset by reduced construction costs due to the light weight of FRP), lower modulus of elasticity of FRP as compared to steel, and linear behavior of FRP materials to rupture (which can lead to a brittle failure mode). The testing of reinforced concrete beams repaired with FRP in flexure (five under a static load and one under a fatigue load) will be reported in this paper. The beam dimensions are 8.5 inches by 11.25 inches in cross section and 11 feet long. The lay up of the FRP used for repair is tailored to maximize flexural and fatigue performance. The relative performance of beams repaired with each is the focus of this paper. The unrepaired beams have an appropriate amount of steel reinforcement to ensure yielding of the reinforcement before failure and have stirrups for preventing a shear failure. Characteristics of behavior that are used to evaluate relative performance are ductility, strength enhancement, and stiffness.

• Availability:
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• Corporate Authors:

  University of Arizona, Tucson

  Drachman Institute, 819 E First Street
  Tucson, AZ  United States  85721

  University of Arizona, Tucson

  Department of Civil Engineering and Engineering Mechanics
  1209 E 2nd Street
  Tucson, AZ  United States  85721-0072

  University of Arizona, Tucson

  Transportation and Traffic Institute
  Tucson, AZ  United States  85721
• Authors:
  • Cousins, T E
  • Lesko, J J
  • Carlin, B
• Conference:
  • Second International Conference on Composites in Infrastructure
  • Location: Tucson, Arizona
  • Date: 1998-1-5 to 1998-1-7
• Publication Date: 1998-1

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 399-409
• Serial:
  • Volume: 2

Subject/Index Terms

• TRT Terms: Beams; Bridge engineering; Ductility; Durability; Fiber reinforced plastics; Flexure; Performance; Reinforced concrete; Stiffness; Strength of materials; Structural plates
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; Materials; I24: Design of Bridges and Retaining Walls; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 00764830
• Record Type: Publication
• ISBN: 189074302X
• Files: TRIS
• Created Date: Jun 2 1999 12:00AM