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Title |
The Combined Effect of Concrete Environment and High Temperature on Interlaminar Shear Strength of FRP Reinforcement
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Keywords |
FRP 보강근 ; 고온 ; 콘크리트 환경 ; 내구성 FRP reinforcement ; High temperature ; Concrete environment ; durability |
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Abstract |
Most experimental studies on durability of FRP reinforcements subjected to high temperature have focused on the effect of high temperature only on tensile properties. But FRP reinforcement used in newly constructed concrete structure is first degraded by moisture and alkaline environment of concrete. When the structure is subjected to fire, the degraded FRP reinforcement is exposed to high temperature. Therefore, the effects of concrete environment and high temperature should be simultaneously considered for evaluation of FRP reinforcement damaged by fire. In this study, FRP reinforcements submerged in simulated solutions of pH 12.3 and 7 for extended period of time were subjected to temperatures of 60oC, 100oC, 150oC, and 300oC to be examined. In order to investigate the effect of the high temperature, interlaminar shear strengths were measured and compared to those of control ones. The experimental results demonstrated that the combined effect of concrete environment and high temperature on properties of FRP reinforcement was more significant than the effect of high temperature or concrete environment solely.
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