论文部分内容阅读
首先利用能量变分法推导出等截面箱梁剪力滞效应微分方程及边界条件 ,对于变截面而言 ,该微分方程和边界条件的系数均是坐标的函数。采用差分法来离散并求解变截面箱梁剪滞效应微分方程 ,结合算例验证该方法的可靠性 ,针对不同荷载作用形式分析了变截面箱梁剪力滞效应规律。
Firstly, the differential equations of shear lag effect and the boundary conditions of box girder with equal cross-section are deduced by using the method of energy variation. For the variable section, the coefficients of the differential equation and the boundary conditions are all functions of the coordinates. The differential method is used to discretize and solve the shear lag effect differential equation of box beam with variable section, and the reliability of the method is verified by an example. The law of shear lag effect of box girder with variable section is analyzed according to different load forms.