往复荷载下AFRP-混凝土界面性能研究  

Study on interface bond behavior between AFRP and concrete under cyclic loading

作　　者：袁娇娇[1,2] 苑溦 侯新宇 林军[1] YUANJiaojiao;YUAN Wei;HOU Xinyu;LIN Jun(School of Construction Engineering,Jiangsu Open University,Nanjing 210036,China;School of Civil Engineering and Transportation,Hohai University,Nanjing 210098,China)

机构地区：[1]江苏开放大学建筑工程学院,江苏南京210036 [2]河海大学土木与交通学院,江苏南京210098

出　　处：《人民长江》2021年第5期180-184,共5页Yangtze River

基　　金：国家自然科学基金资助项目(51908251,51908250)。

摘　　要：纤维增强聚合物(FRP)加固钢筋混凝土结构的性能依赖于FRP片材与混凝土之间的有效粘结。尽管已有大量实验对FRP-混凝土界面性能进行了研究,但是研究主要集中在静态荷载,对动态荷载下的FRP-混凝土界面性能研究较少。通过模拟地震荷载,对往复荷载下芳纶纤维增强聚合物(AFRP)片材与混凝土界面的动态界面性能进行了试验研究。试验结果表明:在往复荷载作用下,AFRP-混凝土界面剥离承载力、延性及最大粘结剪应力降低,AFRP-混凝土界面有效粘结长度增大。试件加卸载刚度随着往复加卸载次数的增加而退化。Performance of Fiber Reinforced Polymer(FRP)reinforcing concrete relies on the effective bond of FRP-to-concrete interface.Although many studies have been carried out to study bond behavior of the interface between FRP sheet and concrete,the research mainly focuses on static load,and there is still a lack of test data on FRP-to-concrete interface under dynamic load.In this paper,the dynamic bond behavior between aramid fiber reinforced polymer sheet and concrete under cyclic loading is studied.The results show that the ultimate load capacity,ductility and the maximum bond shear stress decrease and the effective bond length increases under cyclic loading.The loading and unloading stiffness of the specimen degenerates with the increase of loading and unloading cycles.

关 键 词：FRP 芳纶纤维增强聚合物 界面性能 往复荷载 有效粘结长度 剥离承载力 

分 类 号：TU528.572[建筑科学—建筑技术科学]