The effect of in-plane bending deformation on the lateral_torsional buckling of beam_columns is considered and the effect form, the additional moment factor, is obtained.

得出了平面内弯曲变形对压弯构件弯扭屈曲的影响形式，这一形式可用统一的弯矩附加系数表达。

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The closed form solutions of the critical load and the deflection contour of the delamination buckling decided by delamination radius, and the bridging factor are obtained.

给出了脱层屈曲临界载荷、挠度曲线与脱层半径、搭桥因子等的封闭关系式。

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