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

被引：1
|
作者：
Liu, Yuwen [1 ]
Chen, Wei [1 ]
Liu, Chun [2 ]
Li, Na [2 ,3 ]
机构：
[1] WISDRI City Construct Engn & Res Inc Ltd, Wuhan 430223, Peoples R China
[2] Wuhan Univ, Sch Civil Engn, Wuhan 430070, Peoples R China
[3] Wuhan Univ Technol, Sch Civil Engn & Architecture, Wuhan 430072, Peoples R China
来源：
SUSTAINABILITY | 2022年 / 14卷 / 23期
基金：
中国国家自然科学基金;
关键词：
CFRP; steel composites; bond behavior; elevated temperatures; bond stress; BEHAVIOR; MODULUS;
D O I：
10.3390/su142315537
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
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 degrees C and 90 degrees 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.
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页数：14
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