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在GB 50017—2003《钢结构设计规范》中,关于空间多平面圆钢管相贯节点承载力计算,只能考虑轴力,不考虑腹杆弯矩对节点承载力的影响。在《空心管结构连接设计指南》中单平面圆钢管相贯节点在复合受力状态下的承载力计算公式,主要是参照Eurocode 3。通过对两种规范关于圆钢管相贯焊节点计算公式归纳和对比可知,Eurocode 3相贯节点承载力公式相对于目前GB 50017—2003计算公式来说是偏安全的。基于此,对武汉站圆钢管相贯节点依照Eurocode 3拆分为若干单平面节点,再分别对单平面节点进行校核和演算。利用有限元软件ANSYS建立钢管相贯节点实体模型,进行非线性分析。模拟计算结果表明,该相贯节点设计满足要求。
In GB 50017-2003 Code for Design of Steel Structures, only the axial force can be considered in the calculation of the bearing capacity of the cross-section nodes of the space multi-planar round steel tube, without considering the influence of web moment on the bearing capacity of the node. The formula for calculating the bearing capacity of the cross-section joints of single-flat circular steel tube under combined stress in the “Guidelines for the Design of Hollow-pipe Structures” mainly refers to Eurocode 3. Based on the generalization and comparison of the calculation formulas for the joints of two rounds of circular pipe, we can see that the formula of the bearing capacity of Eurocode 3 is more biased than the current formula of GB 50017-2003. Based on this, the round steel pipe intersections in Wuhan are divided into several single-plane nodes according to Eurocode 3, and the single-plane nodes are checked and calculated respectively. The finite element software ANSYS is used to build the solid model of the steel pipe intersecting node and the nonlinear analysis is carried out. The simulation results show that the design of the intersection node satisfies the requirements.