碳纤维加固锈蚀钢筋混凝土梁的疲劳抗弯性能  

Fatigue Performance of Corroded RC Beams Strengthened with CFRP Sheets

作　　者：陈爽[1,2] 陈宜虎[2] 梁进修[2] 徐宁 

机构地区：[1]广西矿冶与环境科学实验中心,广西桂林541004 [2]桂林理工大学博文管理学院,广西桂林541004 [3]中国市政工程中南设计研究总院有限公司,湖北武汉430010

出　　处：《河南科技大学学报（自然科学版）》2014年第1期58-62,66,共6页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(51268009);广西自然科学基金项目(2012GXNSFBA053151);广西教育厅高校科研项目(201106LX228);广西高等学校特色专业及课程一体化建设项目(GXTSZY232)

摘　　要：设计了2根未锈蚀和6根中度锈蚀程度的钢筋混凝土梁,其中4根锈蚀梁贴碳纤维布进行不同形式的加固,对碳纤维加固锈蚀混凝土梁的疲劳性能进行了研究。试验结果表明:碳纤维加固梁具有良好的疲劳抗弯性能,疲劳加载后发现加固梁不可恢复的残余变形相对较小,说明碳纤维加固可以提高锈蚀梁的恢复力,并且随着碳纤维布加固量的增加,梁的疲劳抗弯性能都有所提升。碳纤维U形箍对疲劳性能也有较大影响。The capacities of two un-corroded and six corroded RC( reinforced concrete) beams were tested. Four of corroded RC beam were strengthened by CFRP( Carbon Fiber Reinforced Polymer) in different ways. This paper analyzed the fatigue performance of CFRP reinforced RC beams. The results shows that the fatigue performance including crack width,deformation and stiffness are all improved with the reinforcement volume increase. Different strengthening ways and quantity have obvious influence on the fatigue performance. Besides, U-shaped hoop of carbon fiber has greater affect on fatigue properties.

关 键 词：碳纤维 锈蚀 钢筋混凝土梁 疲劳抗弯 

分 类 号：TU317[建筑科学—结构工程]