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Sustainability
Volume 14
Issue 23
10.3390/su142315537
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Article

Bond Performance of CFRP/Steel Double Strap Joint at Elevated Temperatures

by
Yuwen Liu
1,
Wei Chen
1,
Chun Liu
2 and
Na Li
2,3,*
1
WISDRI City Construction Engineering & Research Incorporation Ltd., Wuhan 430223, China
2
School of Civil Engineering, Wuhan University, Wuhan 430070, China
3
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430072, China
*
Author to whom correspondence should be addressed.
Sustainability 2022, 14(23), 15537; https://doi.org/10.3390/su142315537
Submission received: 17 September 2022 / Revised: 16 November 2022 / Accepted: 16 November 2022 / Published: 22 November 2022
(This article belongs to the Special Issue Intelligent Solutions for the Sustainability of Bridges and Structures)
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Abstract

Carbon fiber-reinforced polymer (CFRP) has been used widely in the strengthening of steel structures. Steel/CFRP systems being subjected to elevated temperatures is realistic in summer climate events in many countries, which leads to the degradation of the bond performance between CFRP and steel. Therefore, it is critical to study the bond behavior of the CFRP/steel system under elevated temperature. This paper investigates the mechanical performance of CFRP/steel adhesively bonded double strap joints under different temperatures. Thirty CFRP/steel double strap joints were tested to failure under temperatures between 10 °C and 90 °C. It was found that the joint failure mode changed from adherend failure to debonding failure as the temperature was approaching glass transition temperatures. In addition, the ultimate load and joint stiffness decreased significantly under temperatures near to and higher than glass transition temperatures. Based on the experimental results, a model is proposed to predict the bond stress of the CFRP/steel under different temperatures.
Keywords: CFRP/steel composites; bond behavior; elevated temperatures; bond stress CFRP/steel composites; bond behavior; elevated temperatures; bond stress

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MDPI and ACS Style

Liu, Y.; Chen, W.; Liu, C.; Li, N. Bond Performance of CFRP/Steel Double Strap Joint at Elevated Temperatures. Sustainability 2022, 14, 15537. https://doi.org/10.3390/su142315537

AMA Style

Liu Y, Chen W, Liu C, Li N. Bond Performance of CFRP/Steel Double Strap Joint at Elevated Temperatures. Sustainability. 2022; 14(23):15537. https://doi.org/10.3390/su142315537

Chicago/Turabian Style

Liu, Yuwen, Wei Chen, Chun Liu, and Na Li. 2022. "Bond Performance of CFRP/Steel Double Strap Joint at Elevated Temperatures" Sustainability 14, no. 23: 15537. https://doi.org/10.3390/su142315537

APA Style

Liu, Y., Chen, W., Liu, C., & Li, N. (2022). Bond Performance of CFRP/Steel Double Strap Joint at Elevated Temperatures. Sustainability, 14(23), 15537. https://doi.org/10.3390/su142315537

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