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介绍欧洲规范EC 3中关于弯矩、剪力和轴力共同作用的规范条文,指出一些被忽略的设计情况,研究限于1~3级截面类型。结果表明,弯矩、轴力和剪力共同作用的设计情况最难确定。根据Huber-Mises屈服准则与EC 3的设计准则得到的结果进行了比较,并对交互曲线进行对比分析。M-V-N交互作用中轴力和剪力的共同作用十分重要,而现行规范并未给出N-V相互作用下钢构件的设计准则。为此,针对N-V相互作用给出相应设计准则,并对其进行了探讨。
This article introduces the normative provisions of the European Normative EC 3 on the interaction of bending moments, shear forces and axial forces and points out some overlooked design situations. The study is limited to the first to third section types. The results show that the joint design of bending moment, axial force and shear force is the most difficult to determine. The results obtained from the Huber-Mises yield criterion and the EC 3 design criteria were compared and the interaction curves were compared. The interaction of axial force and shear force in the M-V-N interaction is very important. However, the current code does not give the design criteria of steel members under the N-V interaction. Therefore, corresponding design criteria for N-V interaction are given and discussed.