全装配式混凝土结构界面软索连接拼缝抗剪性能试验研究

对5个设置界面软索连接的全装配混凝土试件进行静力加载试验研究,包括3个墙与墙连接试件及2个楼板与楼板连接试件.并采用目前已有的界面抗剪承载力计算方法对试验结果进行对比计算.研究结果表明:拼缝抗剪承载力主要由软索受拉产生的界面抗剪摩擦力和软索自身的销栓力组成,试件呈现良好的延性.针对试验结果,深入分析了软索连接拼缝的受力及破坏机理,采用合理的计算假定,提出了软锁连接拼缝抗剪性能的三折线受力模型,理论方法计算结果与试验值吻合比较理想,可为全预制混凝土结构软索连接拼缝的抗剪承载力计算及工程实践提供参考.

Experimental Study of the Shear Behavior of Total Precast Concrete Structures with Steel Cable Connections

Five precast concrete specimens with steel cable connections were tested statically. These specimens include three wall-wall specimens and two floor-floor specimens. Then the existing methods were used to calculate the shearing resistance of the connections. The results show that the shear capacity of the seam is mainly composed of shear friction of the steel cable in tension and the dowel action of the steel cable. The specimens exhibit excellent ductility. Based on the test results, in-depth analyses were conducted to study the behavior and the failure mechanism of the connection with steel cable. Using rational assumptions, we proposed a trilinear model to predict the shear behavior of the steel cable connection. The results of the trilinear model are in good agreement with those obtained in the test, which provide useful reference to the design and construction of total precast concrete structures with steel cable connections.