摘要:采用有限元方法计算大型钢结构节点的承载力，针对带加劲肋和不带加劲肋的十字型钢管节点，给出有限元方法的建模过程和建模方法，计算在支管轴向荷载作用下的承载力，并将有限元计算结果与足尺试验结果进行比较。研究发现，在支管承压情况下有限元建模时可以对支管的模型进行简化；带加劲肋和不带加劲肋十字型钢管节点的有限元分析结果与足尺试验结果比较吻合；有限元方法可以获得荷载位移曲线的下降段。

Abstract: Finite element method is employed to study the bearing capacity of large-scale steel structures. Cross-shaped steel tubular nodes with reinforced plates and nodes without reinforced plates are taken as examples to carry out the study. The modeling process and modeling technique of the finite element method are provided and the bear capacities of the nodes under brace compression are calculated. Then the results obtained from finite element analysis and full-scale tests are compared. Results shew that the model of the brace can be removed in the finite element modeling process when the nodes are under brace compression. The results obtained from finite element analysis and full-scale tests for the tubular nodes with and without reinforced plates are quite close. Furthermore, the finite element method demonstrates its ability to obtain the decreasing part of load-displacement curve.