内嵌式碳纤维板条与混凝土粘结性能的拉拔实验  

Bond behavior of NSM CFRP plate-concrete interface in pull-out experiment

作　　者：周朝阳[1] 胡志海[1] 贺学军[1] 李蓓[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《中南大学学报（自然科学版）》2007年第2期357-361,共5页Journal of Central South University:Science and Technology

基　　金：湖南省自然科学基金资助项目(05JJ30101);湖南省建设科技计划项目(2005-04)

摘　　要：采用新型的C型试块进行直接拉拔实验,研究碳纤维板条粘结长度、混凝土强度等级和嵌槽尺寸对界面粘结性能(包括破坏形式)的影响。研究表明:极限载荷随粘结长度、混凝土的强度等级和嵌槽尺寸的增大而增大,其中粘结长度的影响最大,混凝土强度等级的影响最小。根据实验测得试块加载端与自由端的荷载和滑移之间的关系曲线,通过计算分析,提出相应的局部粘结-滑移本构模型。A new type of pull-out test set-up with C-shaped specimen was devised to study the bond behavior on the interface of CFRP （carbon fiber-reinforced polymer） plate strips and concrete, Such tests can reduce the influence of eccentricity, The effect of bond length, concrete strength and dimension of the groove on bonding interface was investigated. The result shows that the pull-out load increases when these parameters increase. The major effect comes from bond length and the minor from concrete strength. The local bond-slip relationships are also discussed based on the load-slip relation measured from the test and a constitutive model is suggested by the analysis.

关 键 词：碳纤维条 内嵌式 粘结 拉拔实验 

分 类 号：TU746.3[建筑科学—建筑技术科学]