箍筋约束作用下再生混凝土-钢筋黏结理论研究  

Theoretical study on bond between recycled concrete and steel bar under stirrup restraint

作　　者：梁清 吕梁胜 IANG Qing;LÜLiangsheng(Guangxi Transportation Engineering Quality Monitoring and Appraisal Center,Nanning 530000,China;Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University,Shanghai 201804,China)

机构地区：[1]广西壮族自治区交通运输工程质量监测鉴定中心,广西南宁530000 [2]同济大学先进土木工程材料教育部重点实验室,上海201804

出　　处：《混凝土》2021年第3期15-18,共4页Concrete

基　　金：国家自然科学基金资助项目(51308135)。

摘　　要：首先研究了劈裂和拔出两种破坏模式的再生混凝土的黏结强度理论,推导了箍筋约束作用下的黏结强度计算式。其次,根据钢筋与再生混凝土界面处径向变形与滑移之间的关系建立了劈裂和拔出两种破坏模式的黏结滑移曲线方程。最后将黏结强度及黏结滑移曲线方程理论模型与试验数据进行了对比,发现理论值与试验值吻合良好。Firstly,the bond strength theory of recycled concrete with two failure modes is studied,and the formula for calculating the bond strength under the constraint of stirrups is derived.Secondly,according to the relationship between the radial deformation and the slip of the rebar and recycled concrete,the bond slip curve equation of two modes of splitting and pulling out is established.Finally,the theoretical model of bond strength and bond slip curve is compared with the experimental data,and the theoretical value is in good agreement with the experimental data.

关 键 词：箍筋约束 黏结强度 黏结滑移曲线方程 

分 类 号：TU528.01[建筑科学—建筑技术科学]