温度循环作用后CFRP-混凝土界面黏结性能研究  

Bonding Performance of CFRP-Concrete Interface after Temperature Cycling

作　　者：赵少伟 任梓炜 郭蓉 张家赫 陈冰 ZHAO Shaowei;REN Ziwei;GUO Rong;ZHANG Jiahe;CHEN Bing(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401

出　　处：《重庆交通大学学报（自然科学版）》2022年第10期69-76,共8页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：河北省自然科学基金项目(E2018202173)。

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。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 τincreases 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 τshows 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.

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 

分 类 号：TU375[建筑科学—结构工程] U414[交通运输工程—道路与铁道工程]