预制钢管混凝土剪力墙箍筋插销连接竖缝抗剪强度分析

SHEAR STRENGTH ANALYSIS OF VERTICAL JOINTS BY VERTICAL REINFORCEMENT IN VERTICAL CONNECTIONS OF PREFABRICATED CFST SHEAR WALL

完成了3个截面形式分别为一字形、L形和工字形的1∶3缩尺两层单跨预制钢管混凝土剪力墙的拟静力加载试验,研究了箍筋插销连接的竖向接缝的抗剪性能,并与国内外学者及有关设计规范中提出的抗剪承载力公式计算值进行了对比。结果表明：混凝土齿槽的作用对竖向接缝总抗剪承载力的贡献远远小于抗剪钢筋的销栓作用;剪力墙底部截面的抗剪承载力对竖向接缝的变形破坏也有显著影响,墙底部截面抗剪承载力较高时,竖向接缝不易发生破坏。对预制装配式剪力墙结构,要想保证竖向接缝的可靠性,必须首先保证水平接缝的抗剪能力。

To study the shear behavior of vertical joints by vertical reinforcement in vertical connections for single span prefabricated concrete filled steel tube（ CFST） shear wall,the quasi-static experiments for three 1∶ 3 two-storey specimens with cross-sections of flat-shaped,L-shaped and I-shaped respectively were carried out. The results were compared with the calculated values from researchers at home and abroad and from related design specifications. It was shown that the contribution of concrete cogging to the total shear bearing capacity of vertical joints was far less than that of the dowel action of shear reinforcement. It was also shown that the shear bearing capacity at bottom exhibited a notable influence on deformation of vertical joints. When the shear bearing capacity at the bottom of the wall was high,the vertical joints were not easy to damage. The results showed that the reliability of vertical joints of prefabricated shear wall was closely related to the shear bearing capacity of horizontal joints.