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在现有研究成果的基础上,推导了柱腹板抗压、抗拉和抗剪刚度;钢筋抗拉刚度;柱翼缘和端板抗弯刚度;混凝土楼板抗压刚度等。在此基础上,利用组件法,推导了组合节点初始转动刚度的计算方法、考虑了组合节点承受正弯矩、负弯矩作用的情况。与试验数据比较表明:该方法具有很好的计算精度。给出的初始刚度计算公式,既适用于按照完全抗剪连接设计的组合节点,也适用于按照部分抗剪连接设计的组合节点。
Based on the existing research results, the compressive, tensile and shear stiffness of column webs are deduced; the tensile stiffness of steel bars; the bending stiffness of column flanges and end plates; the compressive stiffness of concrete slabs. On this basis, the method of component method is used to derive the calculation method of the initial rotation stiffness of the composite node, considering that the combined node can bear the positive moment and the negative moment. Compared with the experimental data show that: the method has good calculation accuracy. The formulas for calculating the initial stiffness are not only applicable to the composite joints designed according to the complete shear connection but also to the composite joints designed according to the partial shear connection.