【摘要】 为研究钢管高性能混凝土界面黏结性能，进行了包括钢管壁厚、截面形式、钢材类型和钢管内表面状态4个参数的推出试验研究，分析了试件的试验现象、荷载-滑移曲线和界面黏结强度。结果表明，仅当试件壁厚较薄时，钢管中下部会出现45°剪切滑移线；不同钢管壁厚试件的荷载-滑移曲线共有3种增长模式，均包括胶结滑移段、滑移段和摩阻段3个阶段；增大钢管壁厚、使钢管内表面锈蚀可以提高界面黏结强度；采用方形钢管代替圆形钢管、不锈钢管代替普通钢管对界面黏结强度有不利影响。更多还原

【Abstract】 In order to study the interfacial bonding property of high performance concrete-filled steel tube, a series of push-out tests were carried out. Wall thickness, section shape, type of steel and internal surface state of steel tube were chosen for contrast parameters. By investigating the test phenomena, mode of load-slip curves and interfacial bonding strength, it was found that shear yield line with an angle of 45° will appear in the middle and lower parts of the steel tube only when tube wall thickness of specimens was small. The load-slip curves of specimens with different wall thicknesses have three growth modes, but all include cementation slip stage, slip stage and friction stage. By increasing the wall thickness and rusting the inner surface of steel tube, the interfacial bonding strength can be increased. Replacing circular steel tube with square steel tube and replacing ordinary steel tube with stainless steel tube have adverse effects on the interfacial bonding strength.更多还原