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为研究方钢管混凝土外伸端板螺栓连接节点抗拉拔性能,进行7组试验,研究了方钢管截面尺寸、混凝土强度、螺栓强度、螺栓孔间距和方钢管管壁厚度对承载能力影响,获得了试件的荷载位移曲线,分析了各条件对承载力影响的不同程度。研究结果表明:这些因素中刚管壁厚度对承载力影响最大,混凝土强度影响最小,管壁厚度和螺栓强度决定了破坏模式,当由管壁厚度控制强度时强度较低,延性较好,当由螺栓控制强度时相反。
In order to study the tensile properties of square tubular-shaped concrete overhanging end-plate bolted joints, seven groups of tests were carried out to study the effects of cross-sectional square steel pipe size, concrete strength, bolt strength, bolt hole spacing and square steel pipe wall thickness on bearing capacity The load displacement curves of the specimens were analyzed, and the different degrees of influence of the various conditions on the bearing capacity were analyzed. The results show that the thickness of the just-affected wall has the greatest influence on the bearing capacity and the least impact of the concrete strength. The wall thickness and the bolt strength determine the failure mode. When the strength is controlled by the thickness of the wall, the strength is lower and the ductility is better. The opposite is true when the strength is controlled by the bolt.