胶层厚度对CFRP板材与混凝土界面黏结性能影响  

Effect of Adhesive Thickness on Bond Behavior of CFRP Plate-concrete Interface

作　　者：郭诗惠[1,2,3] 张建仁[1] 高勇[1] 蔡春声[1] 

机构地区：[1]长沙理工大学土木与建筑学院,湖南长沙410114 [2]南阳理工学院土木工程学院,河南南阳473000 [3]长沙理工大学桥梁工程安全控制教育部重点实验室,湖南长沙410114

出　　处：《公路交通科技》2015年第9期87-91,97,共6页Journal of Highway and Transportation Research and Development

基　　金：国家重点基础研究发展计划(九七三计划)项目(2015CB057705);国家自然科学基金项目(51229801);湖南省研究生创新项目(CX2014B373);长沙理工大学桥梁领域开放基金项目(14KA01)

摘　　要：根据8个单剪试件的试验研究结果,采用有限元通用软件ABAQUS进行了数值模拟,通过分析试件的破坏模式、FRP板应变分布规律和极限承载力的变化情况,考察了胶层厚度对CFRP-混凝土界面黏结强度的影响。研究结果表明:胶层厚度对CFRP-混凝土界面的黏结性能有显著影响,黏结强度随胶层厚度增加而提高,增加到3 mm时达到最大;超过3 mm时,强度等级低的混凝土界面黏结强度随着胶层厚度的增加而减小,而强度等级高的混凝土界面黏结强度随着胶层厚度的增加而继续增大,但增加幅度减小。Based on the test research result of a total of 8 single shear specimens, numerical simulation is conducted using finite element generic software ABAQUS. By analyzing the failure mode of the specimens, the distribution of the FRP strain, and the change of ultimate bearing capacity, the influence of the adhesive thickness on the bonding behavior of CFRP plate-concrete interface is investigated. The result shows that （ 1 ） the adhesive thickness has a significant effect on the bonding behavior of the CFRP-concrete interface, with the increase of adhesive thickness, the bond strength increases and reaches the maximum at 3 mm ; （2） when the adhesive thickness is more than 3 mm, with the increase of adhesive thickness, the interface bond strength of the low strength grade concrete specimen reduces while the bond strength of the high strength grade concrete specimen continues to increase, but the rate of increase decreases.

关 键 词：桥梁工程 黏结性能 有限元分析 CFRP-混凝土 胶层厚度 

分 类 号：U443.31[建筑科学—桥梁与隧道工程]