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为了研究非金属剪力键的力学性能,在考虑非金属剪力键黏结厚度、材料性能和界面处理工艺等因素的基础上,设计了12组(共36个)非金属剪力键的推出试验;基于这类剪力键的界面黏结-滑移变化规律,研究了界面的黏结-滑移本构关系。在试验结果和统计分析的基础上,给出了界面黏结-滑移关系式,并建立了一般意义上非金属剪力键的界面黏结-滑移本构关系模型。研究结果表明:非金属剪力键的黏结厚度、材料性能及界面处理工艺对黏结-滑移曲线影响显著;随着黏结厚度的增加,界面初始滑移荷载值减小;当达到极限滑移量时绝大部分试件表现为脆性破坏,而采用丙烯酸酯的非金属剪力键表现出较强的塑性破坏特征;采用单横向凹槽界面处理工艺的非金属剪力键的界面黏结效果最佳;界面极限剪应力与极限滑移近似成正比;非金属剪力键可以较好地应用于钢-混凝土组合梁的界面中。
In order to study the mechanical properties of non-metallic shear bond, 12 sets of 36 non-metallic shear bonds were designed on the basis of factors such as bond thickness of non-metallic shear bond, material properties and interface treatment. Based on the change of interface bond-slip of such shear bond, the bond-slip constitutive relationship of the interface is studied. Based on the experimental results and statistical analysis, the interface bond-slip relationship is given, and the interface bond-slip constitutive model of non-metallic shear bond is established. The results show that the bond thickness, the material properties and the interfacial process of the non-metallic shear bond have a significant effect on the bond-slip curve. With the increase of the bond thickness, the initial slip load decreases; when the limit slip Most of the specimens showed brittle failure, while the non-metallic shear bond of acrylic ester showed strong plastic failure characteristics. The interface bonding effect of non-metallic shear bond with the single transverse groove interface treatment was the best ; The ultimate shear stress of the interface is approximately proportional to the ultimate slip; and the non-metallic shear bond can be well applied to the interface of the steel-concrete composite beam.