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Title |
Evaluation of Tensile Strength of CFRP Rebar at Elevated Temperatures according to KS Standard
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Authors |
강승범(Seung-Beom Kang) ; 김선희(Sun-Hee Kim) ; 최원창(Wonchang Choi) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.3.347 |
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Keywords |
탄소섬유 보강근; 고온 인장 실험; 인장강도; 탄성계수 CFRP rebar; elevated temperature tensile test; tensile strength; elastic modulus |
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Abstract |
In this study, elevated temperature tensile tests were conducted on 13 mm diameter carbon fiber reinforced polymer(CFRP) rebars in accordance with the KS standard, and their tensile properties were analyzed as a function of temperature. The results showed that at 100 °C, tensile strength increased due to the post-curing effect, while after 300 °C, both tensile strength and ultimate strain decreased rapidly due to resin decomposition. It was confirmed that residual resin remained below 250 °C, while at 375 °C, an increasing trend in the elastic modulus was observed as most of the resin was lost. Reliability evaluation showed relatively high consistency under elevated-temperature conditions, except at 250 °C suggesting the need for further research to enhance the applicability and accuracy of the KS standard under such conditions.
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