【摘要】 基于更精确的平衡微分方程式，导出了弯曲平面内变形对受弯和压弯构件弯扭屈曲临界荷载的影响的修正因子．该因子形式简单，且由于它考虑因素全面，使修正后的公式应用广泛．在经典解中计入修正因子就得出准确的临界荷载。对于受弯构件，修正后其临界弯矩的提高只与构件截面的ＥＩｘ和ＥＩｙ有关；对于压弯构件，修正后其临界荷载的变化还与因子（１—Ｎ／ＮＥ）的平方有关。更多还原

【Abstract】 Based on the more accurate governing differential equations, two modification factors, which are derived by considering the effect of the in-plane bending deformation of the lateral-torsional buckling of both beams and beam-columns, are obtained in this paper. The form of the modification factors is simple and the modified formulas have wide applicability because more factors have been considered in them. The accurate critics loads are obtained by using the modification factors in the classical formulas. For beams, the increases of the critical moments depends only on the rigidities of both EIx and EIy of the member’s cross sections. For beam-columns, the variations of the critical loads, besides EIx and EIy, depend also on the square of factor (1-N/NE ).更多还原