Carbon Fiber-Reinforced Polymer Prestressed Prisms as Reinforcement in Continuous Concrete T-Beams

Fiber reinforced polymer (FRP) prestressed concrete prisms (PCPs) are bars of small cross section made with high-strength concrete and concentrically pretensioned by a single FRP bar. When PCPs are used as reinforcement, improvements in service load behavior of the reinforced concrete can be expected. This paper describes the behavior of two-span continuous concrete T-beams reinforced with carbon fiber-reinforced polymer (CFRP) PCPs at service and ultimate. High-strength concrete prisms were concentrically prestressed by a single CFRP bar and used as main reinforcement in these beams. Companion steel and CFRP-reinforced beams were tested for comparison and to evaluate the effect of reinforcement on beam behavior. Theoretical analysis showed superior performance of PCP-reinforced beams before cracking of prisms and higher ductility than CFRP-reinforced beams at ultimate. Test results confirmed that prior to cracking of the prisms, PCP-reinforced beams had comparable deflection with steel reinforced beams, while deflection in the CFRP-reinforced beams was 2.5 times larger. Steel-reinforced beams showed the highest ductility and moment redistribution at ultimate, followed by PCP- and CFRP-reinforced beams. A higher prestressing level in prisms increased the prism cracking load and improved the behavior of the beam at the service load condition.

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  • Authors:
    • Davoudi, Shahryar
    • Svecova, Dagmar
    • Gheorghiu, Catalin
  • Publication Date: 2008-5


  • English

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  • Accession Number: 01104862
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 18 2008 10:58AM