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为深入分析摩擦型高强螺栓和焊缝并用连接节点的传力机理,研究其受拉承载性能。首先,建立栓焊并用连接节点的有限元模型,计算得出连接节点的荷载-位移全过程曲线与应力分布情况进行分析。通过典型试验的结果验证了有限元模型的可靠性;并用连接节点的位移-荷载曲线大致可划分为线性阶段、线性强化阶段和屈服阶段三部分;焊缝和螺栓的强度比值决定了节点的破坏模式以及荷载-位移曲线的各个阶段长短;考虑到最后破坏模式的差异,在并用连接节点的承载力计算公式中考虑栓焊强度比值的影响,提出栓焊混接接头受拉承载性能设计方法。研究结果为钢结构摩擦型高强螺栓和焊缝并用连接节点的设计提供参考。
In order to further analyze the transmission mechanism of the friction type high strength bolts and weld joints and the connection nodes, the tensile bearing capacity is studied. First, the establishment of bolting welding and the use of connecting nodes of the finite element model to calculate the connection node load - displacement of the whole process of curve and stress distribution analysis. The reliability of the finite element model is verified by the results of typical tests. The displacement-load curve of the joint can be roughly divided into three parts: linear, linear and yield stages. The ratio of weld to bolt determines the failure of the joint Mode and the length of each stage of load-displacement curve. Considering the difference of the final failure mode, considering the influence of the ratio of the welding strength to the calculation formula of the bearing capacity of the joint, the design method of the tension-loading performance of the welding joint is proposed. The result of the study is that the steel structure friction type high strength bolts and welds can be used as a reference for the design of connecting nodes.