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在分析箱梁剪力滞效应时 ,用多个不同的纵向位移剪力滞差值函数自动计入翼板宽度及其至截面形心距离的影响 ,并且考虑轴力平衡条件 ,构造薄壁箱梁 (可蜕变为开口截面梁 )的翘曲位移函数 ,导出了控制微分方程、边界条件及相应的一维有限元列式。数值计算比较和模型实验验证表明 ,本文方法是简单而有效的
In the analysis of shear lag effect of box girder, the influence of wing width and its centripetal distance to the cross section is automatically calculated by using a number of different longitudinal displacement shear lag functions, and considering the conditions of axial force balance, The warping displacement function of the beam (which can be transformed into an open cross-section beam) leads to the governing differential equation, the boundary conditions and the corresponding one-dimensional finite element formulation. Numerical calculation and comparison with model tests show that the proposed method is simple and effective