［摘要］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。
［关键词］不对称混合连接；弯矩转角关系；剪摩擦作用；约束混凝土
中图分类号：TU378文献标识码：A文章编号：1002-848X(2011)10-0084-05
Study on the performance of unsymmetrical hybrid connection interface of the beam and column
Liang Peixin1, Guo Zhengxing2(1 Department of Civil Engineering, Nanjing Institute of Technology, Nanjing 211167, China;2 College of Civil Engineering, Southeast University, Nanjing 210096, China)
Abstract:Unsymmetrical hybrid connection is a post\|tensioned dry connection with damping. The unsymmetrical common steel bars as energy\|dissipation component are only placed on the upside of the beam section. According to the deformation and the forces of the interface, the equation of the moment vs. lift\|off angle was deduced, then the relationships of the three experiments were solved by numerical simulation method. The experimental simulation curves show that the moment vs. lift\|off angle relationships are not identical under positive and negative moment. Under positive moment, the initial effective compressed stress of the section is the primary factor that influences the yielding moment. Under negative moment, the area ratio of the commom steel bars is another important factor that influences the yielding moment, and the connection holds more ductility and strength. The correctness of theoretical analysis method was proved by comparing the theoretical analysis results with the experiment results. Finally, the theoretical analysis method was used to analyze the shearing\|friction function of the interface.  The formulation of section balance condition under shearing loading was deduced, and the propositional stirrups volume ratio of confined concrete of the beam was brought out.
Keywords:unsymmetrical hybrid connection; moment vs. lift\|off angle relationship; shear\|friction function; confined concrete
*南京工程学院引进人才资助项目（YKJ200902）。
作者简介：梁培新，博士，讲师，Email:liangsdx@163.com。
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