- 摘 要
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［摘要］不對稱混合連接屬于后張有阻尼干連接延性節(jié)點，作為耗能元件的普通鋼筋僅布置在梁截面上部。根據(jù)梁柱接觸面各部件的變形和受力特點，推導了截面的彎矩轉角關系方程，并通過數(shù)值方法求解了3榀試件的彎矩-轉角關系曲線。從3榀試件的模擬曲線上可以看出：梁端承受正、負彎矩時的彎矩-轉角關系并不一致；承受正彎矩時，截面初始有效預壓應力是影響截面屈服彎矩的主要因素；承受負彎矩時，普通鋼筋的配筋率對屈服彎矩同樣有較大的影響，連接的延性和強度更好。理論分析結果與試驗結果的對比證明了理論分析方法的正確性。應用理論方法對接觸面剪摩擦作用進行了分析，給出了接觸面受剪平衡條件計算公式和梁端約束混凝土的體積配箍率的合理取值。
［關鍵詞］不對稱混合連接；彎矩轉角關系；剪摩擦作用；約束混凝土
中圖分類號：TU378文獻標識碼：A文章編號：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
*南京工程學院引進人才資助項目（YKJ200902）。
作者簡介：梁培新，博士，講師，Email:liangsdx@163.com。
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