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通过对6组共18个预应力混凝土框架自复位节点进行抗剪性能试验,研究了预应力螺杆轴力、构件连接面尺寸、梁下钢牛腿对抗剪性能的影响,提出了预应力混凝土框架自复位节点接缝抗剪承载力计算公式,并分析了摩剪系数的取值。研究表明:节点抗剪承载力与预应力螺杆轴力呈正相关关系,构件连接面尺寸对节点抗剪承载力影响不明显;使用钢牛腿能提高节点的抗剪性能。
The effect of prestressing force on the shear resistance of prestressed concrete frame self-resetting joints was studied. The influence of the prestressing force of the screw shaft, the size of the connecting surface of the member and the shear strength of the beam under the beam were studied. Prestressed concrete The calculation formula of the joint shear resistance of the self-restoring joint of the frame and the value of the friction coefficient are analyzed. The results show that there is a positive correlation between the shear strength of the joints and the axial force of the prestressed screw, and the size of the connecting surface of the members has no obvious effect on the shear strength of the joints.