荷载与环境耦合作用下锈蚀钢筋混凝土粘结性能

关键字：荷载,环境,耦合作用,锈蚀,钢筋混凝土

（1.重庆交通大学 土木工程学院，重庆  400074；2.浙江大学宁波理工学院 土木建筑工程学院，浙江 宁波  315100）

    摘要：基于60组不同外荷载、不同锈蚀率的钢筋混凝土试件的拉拔试验，分析了不同外荷载、不同锈蚀率条件下钢筋混凝土试块的拉拔破坏形式，粘结滑移关系以及对粘结性能的影响规律，并结合试验数据，拟合出了荷载与环境耦合作用下锈蚀钢筋混凝土粘结滑移本构关系，研究结果对实际钢筋混凝土结构耐久性设计具有一定的指导意义。
    关键词：钢筋混凝土；外荷载；锈蚀；粘结滑移；本构模型
    中图分类号：TU503        文献标识码：A        文章编号：1001-702X（2017）08-0111-04

Experimental study on the bonding performance of corroded reinforced concrete under the coupling action of load and environment
XU Yidong1，2，DU Kun1，2，ZOU Yisong1，WU Fan1，2，HU Lei1，2
（1.School of Civil Engineering，Chongqing Jiaotong University，Chongqing 400074，China；2.School of Civil Engineering & Architecture，Ningbo Institute of Technology of Zhejiang University，Ningbo 315100，China）

    Abstract：Based on the pull-out test of 60 groups reinforced concrete specimen with different loads and different corrosion rate，we analyze damaging form and bond-slip relationship of reinforced concrete block under the condition of different external loading sectors and different rusting rate，and the influence law of bonding performance. Then，combine with the test data，we fit out the bond-slip constitutive relation of corroded reinforced concrete under the coupling action of the loading and the environment. The research results have certain guiding significance for the design of the actual structure durability of reinforced concrete.
    Key words：reinforced concrete，external loading，corrosion，bond-slip，constitutive model