【摘要】 根据薄壁曲线梁理论和势能变分原理,考虑箱梁翼缘正应力的剪滞效应和结构大挠度影响,导出了薄壁曲线箱梁的几何非线性控制微分方程,并采用样条最小二乘配点法进行求解,其结果与试验值和有限段解基本吻合。文中给出的公式和方法可供薄壁曲线箱梁设计参考。更多还原

【Abstract】 By means of the potential variational principle and the theory of thin-walled box girders,considering the influence of the shear lag effect of flanges stress and the large deflection,the geometry nonlinear governing differential equation of thin-walled box girders is obtained.The equation is solved with the least two-multiplication allotting point method.The results are consistent with those of the test and the segment method.The proposed formulae and method could be referenced to the design for the thin-walled box girders.更多还原