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.
作者
袁娇娇
苑溦
侯新宇
林军
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)
出处
《人民长江》
北大核心
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)。
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
Fiber Reinforced Polymer
aramid fiber reinforced polymer
interface performance
cyclic loading
effective bond length
carrying capacity of stripping
作者简介
袁娇娇,女,讲师,博士研究生,主要从事混凝土结构耐久性方面的研究。E-mail:506983732@qq.com。
