Abstract: Firstly, 36 specimens after temperature cycling were subjected to double shear tests. Secondly, the influence of factors such as temperature cycles, concrete strength and CFRP slab width and thickness on interface bonding performance was analyzed. Finally, based on the fitting of Monti bilinear model, the interface bond-slip constitutive model under the action of temperature cycling was obtained. The results show that with the increase of the number of temperature cycles, concrete strength grade and CFRP board width and thickness, the maximum interface shear stress τmax increases in varying degrees. Among them, the number of temperature cycles has a significant impact on it, but as the number of temperature cycles increases, the increase of the maximum interface shear stress τmax shows a slowdown trend. The fitting values of the bond-slip constitutive model are in good agreement with the test results, and the modified model has high reliability.

Key words: highway engineering; CFRP-concrete interface; bonding performance; temperature cycle; interface shear stress; bond-slip relationship

摘要： 通过对温度循环作用后的36个试件进行双剪试验，分析温度循环次数、混凝土强度、CFRP板宽度和厚度等因素对界面黏结性能的影响，在Monti双线性模型基础上拟合，得到温度循环作用后界面黏结-滑移本构模型。结果表明：随着温度循环次数、混凝土强度等级、CFRP板宽度和厚度的增加，界面最大剪应力会有不同程度的增大，其中温度循环次数对其影响较为显著，但随着温度循环次数的增加，界面最大剪应力的增长呈现放缓的趋势；黏结-滑移本构模型拟合值和试验结果吻合良好，修正的模型具有较高的可信度。

关键词: 道路工程；CFRP-混凝土界面；黏结性能；温度循环；界面剪应力；黏结-滑移关系