针对在门窗和幕墙工程中广泛使用的铝合金E形薄壁截面构件,文中通过分析不同长细比构件在受弯整体屈曲时挠度-弯矩曲线、轴向应变-弯矩曲线的特征和联系,探讨了在挠度-弯矩曲线无极值时,铝合金E形截面构件受弯整体屈曲临界弯矩的确定方法。 Aiming at the aluminum alloy E-shaped thin-walled section members which are widely used in the doors and windows and curtain walls engineering, by analyzing the characteristics and the relationship between the deflection-bending moment curves and the axial strain-bending moment curves of different slenderness members under bending , The method to determine the critical moment of buckling of E-section members subjected to bending under the limitless deflection-bending moment curve was discussed.