静的および疲労荷重下におけるCFRP板で補強した鉄筋コンクリートはりの強度と変形特性(建設材料特集)

概要

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The carbon fiber-reinforced plastic(CFRP) plate bonding is a method in which CFRP plates are bonded by mean of epoxy resin to the surface of existing reinforced concrete(RC) structures. This method permits the insufficient amount of steel bars in the section of the structural member to be compensated externally. Therefore, it is considered that this method will become widely used under a corrosive environment since the CFRP plate is rust-proof. In this study, the strength and deformation characteristics of the RC beam strengthened with a CFRP plate under static and fatigue loading were dealt with. The experiments revealed the mode of failure for the beam bonded with a CFRP plate and subjected to static incremental loading to be flexural failure, and both the flexual rigidity and ultimate strength to increase. The fatigue failure for the beam bonded with a CFRP plate under the repetitive loading was not produced by the fatigue fracture of CFRP plate but by that of steel bars. The fatigue strength at 2×10^6 cycles of load repetition for the RC beam bonded with a CFRP plate was 57 percent of the static strength of the same beam.
1994-08-15