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本文通过具体例题，阐述了双向弯曲变形构件中危险截面的判定方法，论证了合成弯矩大的截面不一定是危险截面的结论。
In this paper, a specific example is given to illustrate the method of determining the critical cross-section of a biaxial bending member, and the conclusion is drawn that the cross section with large bending moment is not necessarily a dangerous cross-section.