预埋波纹管单排钢筋浆锚连接的预制剪力墙抗震性能研究

Research on Seismic Performance of Precast Shear Wall Connected by Embedded Corrugated Pipe and Single Row of Steel Bars

目的研究预埋波纹管单排钢筋浆锚连接预制剪力墙的抗震性能,解决装配式剪力墙结构现场装配时墙体间配筋复杂、连接钢筋数量较多、导致施工难度较大等实际工程问题。方法在采用预埋波纹管成孔、螺旋箍筋约束浆锚连接的基础上,提出一种将墙体非边缘构件的竖向连接钢筋采用“以少代多”单排布置的新型连接方式。通过拟静力试验,考察预制剪力墙非边缘构件竖向钢筋采用全数连接和单排钢筋连接的差异,分析并比较两种预制墙体承载性能、延性、刚度及耗能能力。结果单排钢筋浆锚连接的墙体试件破坏模式与钢筋全数连接试件基本相同,最终形成墙体根部混凝土被压碎、边缘钢筋屈服的剪切破坏;墙体的延性系数均大于4,具有良好的延性。结论单排钢筋浆锚连接预制剪力墙与钢筋全数连接的墙体试件具有相似的抗震性能,说明预制剪力墙非边缘构件采用单排钢筋浆锚连接形式可靠。

This paper studies the seismic performance of the prefabricated shear walls connectedby embedded corrugated pipe and single row of steel bars,which can solve practical engineering problems such as complex reinforcement between the walls,a large number of connecting steel bars and difficult construction during the on-site assembly of the prefabricated shear wall structure.Based on the use of hole formation of embedded corrugated pipes and connection of grouted anchors with spiral stirrups,this paper proposes the vertical connecting steel bars of non-edge members of the wall which arranged in a single row by“replace more with less”.Through the pseudo-static test,the difference between the vertical reinforcement of the non-edge members of the precast shear wall and the single row of reinforcement is investigated,and the bearing performance,ductility,rigidity and energy consumption capacity of the two precast walls are analyzed and compared.The above research results show that the failure mode of the wall specimens connected by a single row of reinforced mortar anchors is basically the same as that of the specimens connected by all steel bars.The concrete at the root of the wall is crushed and the edge steel bars yield shear failure;the ductility coefficient of the wall is greater than 4,which has good ductility.The specimens of the precast shear wall connected by a single row of reinforced grouted anchors and all steel bars have similar seismic performance,indicating that the non-edge members of the precast shear wall are reliable in connection with a single row of reinforced grouted anchors.