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Experimental investigation of the mechanical properties of carbon fiber-reinforced polymer (CFRP) tendons during and after exposure to elevated temperatures

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Abstract

This paper presents test results on the tensile mechanical properties of carbon fiber-reinforced polymer (CFRP) tendons during and after high-temperature exposure. Detailed experiments are conducted to determine the failure strength and elastic modulus of 8-mm-diameter CFRP tendons. The test results indicate that the CFRP tendon stress–strain relationships remained almost linear during and after high-temperature exposure. The CFRP tendon failure strength and elastic modulus gradually decrease with increasing temperature. Further study reveals that the CFRP tendon mechanical properties greatly recover before 200 °C, which represents a possibility for the repair of concrete members strengthened with CFRP tendons after fire. These test data are utilized to establish CFRP tendon thermodynamic models. They can be applied in computer programs to model the behavior of concrete members strengthened with CFRP tendons during and after high-temperature exposure.

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Acknowledgements

The authors would like to gratefully acknowledge the financial support received from the National Natural Science Foundation of China (U1904177), and the Open Foundation of Henan Key Laboratory of Grain and Oil Storage Facility & Safety (2021KF-B06). Gratitude is also extended to Jiangsu Hengshen Co., Ltd., for providing the CFRP tendons, and Jiangsu Yiding Electric Power Technology Co., Ltd., for providing the anchorages.

Funding

This study was funded by the National Natural Science Foundation of China (Grant No. U1904177), and the Open Foundation of Henan Key Laboratory of Grain and Oil Storage Facility & Safety (Grant No. 2021KF-B06).

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Authors and Affiliations

  1. Henan Key Laboratory of Grain and Oil Storage Facility & Safety, Henan University of Technology, Zhengzhou, 450001, China

    Fei Zhou, Rui Pang & Jing Cui

  2. School of Civil Engineering, Zhengzhou University, Zhengzhou, 450001, China

    Pu Zhang

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  1. Fei Zhou
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  2. Rui Pang
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  3. Pu Zhang
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  4. Jing Cui
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Correspondence to Pu Zhang.

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Zhou, F., Pang, R., Zhang, P. et al. Experimental investigation of the mechanical properties of carbon fiber-reinforced polymer (CFRP) tendons during and after exposure to elevated temperatures. Mater Struct 55, 82 (2022). https://doi.org/10.1617/s11527-022-01923-x

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  • DOI: https://doi.org/10.1617/s11527-022-01923-x

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