装配式剪力墙结构竖向钢筋间接搭接研究现状与发展

Research status and development of indirect splice of vertical reinforcement ir precast shear wall structure

装配式混凝土剪力墙结构的钢筋连接问题一直是行业关注焦点,钢筋传力方式对装配式结构的连接可靠性与施工安装效率等均有重要影响。本文综述了装配式剪力墙结构竖向钢筋间接搭接的研究现状,总结了不同装配式剪力墙结构体系中竖向钢筋间接搭接的构造方式,分析了竖向钢筋与连接钢筋之间的传力机理,综述了钢筋布置形式、钢筋间距、钢筋直径、横向钢筋、混凝土强度以及搭接长度等因素对钢筋间接搭接传力效果及装配式剪力墙受力性能的影响。现有的研究缺乏叠合剪力墙混凝土结合面处理工艺与施工质量对钢筋间接搭接传力效果的影响,建议开展不同影响因素对搭接长度影响的定量研究,为实际工程应用提供依据。

Reinforcement connection of assembled concrete shear wall structure has always been the focus of attention in the industry,and the way of reinforcement force transmission has an important impact on the reliability of the connection and the construction and installation efficiency of the assembled structure.In this paper,the research status of indirect splice of vertical reinforcement in precast shear wall structures is summarized.The construction methods of indirect splice of vertical reinforcement in different precast shear wall structure systems are summarized.The force transfer mechanism between vertical reinforcement and connecting reinforcement is analyzed.The influence of factors such as layout form of steel bars,spacing,diameter,transverse reinforcement,concrete strength and lapping length on the force transfer effect of indirect splice of steel bars and the force performance of precast shear walls is summarized.The influence of concrete interface's treatment process and construction quality of superimposed shear wall on the indirect splice force transfer effect of steel reinforcement is found to be lacking in existing research.It is suggested to carry out quantitative research on the influence of different influencing factors on the lap length,which can provide the basis for practical engineering applications.