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为研究节点区柱钢管非连续式钢管混凝土柱-梁节点的受剪性能,对5个柱-梁中节点试件进行低周反复荷载试验。对节点的破坏形态和骨架曲线进行分析,结果表明随着节点面积增大系数(节点面积/柱面积)和相对配筋系数(节点体积配筋率/梁配筋率)的增大,节点的受剪承载力和延性逐渐改善。基于修正斜压场(MCFT)的基本理论,并对节点的受力边界进行简化,建立该节点在剪、压复合作用下的抗剪承载力计算方法;采用该文的简化方法计算得到的节点峰值剪应力与试验结果进行对比,二者吻合良好。
In order to study the shear performance of discontinuous CFST column-to-beam joints in the node area, low-cycle repeated loading tests were carried out on five column-to-beam joints. The failure morphology and skeleton curves of the joints were analyzed. The results show that with the increase of the node area increasing coefficient (node area / column area) and the relative reinforcement coefficient (node volumetric reinforcement ratio / beam reinforcement ratio) Shear capacity and ductility gradually improved. Based on the basic theory of MCFT, the force boundary of the node is simplified, and the calculation method of the shear strength of the node under shear and pressure combination is established. By using the simplified method, Peak shear stress and test results were compared, the two agree well.