FRP筋与混凝土粘结滑移试验研究  

Experimental Study on Bond-Slip Behavior between FRP Bars and Concrete

作　　者：张海霞[1] 朱浮声[1] 孙丽[1] 李杰[2] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《沈阳建筑大学学报（自然科学版）》2008年第6期989-992,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：建设部研究开发项目(2007-K2-14);沈阳建筑大学省级重点实验室开放基金项目(JG200708);沈阳建筑大学青年基金项目(2007101)

摘　　要：目的探讨FRP筋混凝土试件的受力过程和破坏形式,建立FRP筋与混凝土粘结-滑移本构关系模型.方法对84个FRP筋混凝土试件进行单端拉拔试验,分析试验结果,对试件荷载(粘结应力)-滑移关系曲线进行研究.结果试验结果表明,试件的受力过程划分为两种形式,即肋未剥离劈裂破坏和肋剥离断裂破坏.肋未剥离劈裂破坏的受力过程分为微滑移、滑移、劈裂、下降和残余阶段;肋剥离断裂破坏的受力过程分为微滑移、滑移、剥离断裂和下降阶段.结论FRP筋混凝土试件的受力过程和破坏形式与FRP筋表面肋有重要关系;基于肋未剥离劈裂破坏的试验结果建立的FRP筋与混凝土粘结-滑移本构关系模型能够比较真实地反映试件粘结滑移全过程实际受力特征.In all, 84 tensile tests of concrete specimens studied in this paper. The process of bearing capacity reinforced with FRP bars and the results obtained are and failure form of specimens are discussed in detail. The load （average bond stress ） -slip relationship of FRP bars to concrete under direct pullout is analyzed. The experimental results show that the process of bearing capacity of concrete specimens reinforced with FRP bars has connection with the rib of FRP bars. The two forms of the non-exfoliation splitting failure and the exfoliation failure of the rib are divided. The process of bearing capacity of the former includes minute slip, slip, splitting, descending and residual stage and that of the latter includes minute slip, slip, collapsing, descending stage. In addition, a new model is protx）sed for the entire curve of the bond-slip constitutive law. It can be seen that the proposed bond-slip gives results in close agreement with the experimental results.

关 键 词：FRP筋 混凝土 受力过程 粘结-滑移本构关系模型 

分 类 号：TU398[建筑科学—结构工程]