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不对称混合连接属于后张有阻尼干连接延性节点,作为耗能元件的普通钢筋仅布置在梁截面上部。根据梁柱接触面各部件的变形和受力特点,推导了截面的弯矩-转角关系方程,并通过数值方法求解了3榀试件的弯矩-转角关系曲线。从3榀试件的模拟曲线上可以看出:梁端承受正、负弯矩时的弯矩-转角关系并不一致;承受正弯矩时,截面初始有效预压应力是影响截面屈服弯矩的主要因素;承受负弯矩时,普通钢筋的配筋率对屈服弯矩同样有较大的影响,连接的延性和强度更好。理论分析结果与试验结果的对比证明了理论分析方法的正确性。应用理论方法对接触面剪摩擦作用进行了分析,给出了接触面受剪平衡条件计算公式和梁端约束混凝土的体积配箍率的合理取值。
The asymmetric hybrid connection belongs to the post-tension damped dry connection ductility node, and the ordinary reinforcement as the energy-consuming component is only arranged on the upper part of the beam cross-section. According to the deformation and force characteristics of the contact surfaces of beam and column, the formulas of moment-rotation relationship were deduced and the bending moment-rotation curves of 3 × specimens were solved numerically. It can be seen from the simulation curves of the 3 × specimens that the moment-angle relationship of the beam end subjected to positive and negative moments is not consistent. When the positive moment is accepted, the initial effective pre-stress of the section is the influence of the yield moment The main factors; when subjected to negative bending moment, the reinforcement ratio of ordinary steel also has a greater impact on yielding moment, and the ductility and strength of the connection are better. The comparison between theoretical analysis and experimental results proves the correctness of the theoretical analysis method. The friction effect of the contact surface shear is analyzed by using the theoretical method. The calculation formulas of the shear equilibrium condition of the contact surface and the reasonable value of the volumetric stirrup ratio of the beam confined concrete are given.