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文献[1]、[2]对板桁组合钢桥模型的对称荷载工作进行了空间结构力学性能分析,文献[2]还对其在偏载下的结构力学性能作了分析。本文视固定支座可绕y轴自由转动,其余五个自由度完全受约束,视活动支座可绕y轴转动并沿x轴方向自由移动,进行了竖向偏载下的空间分析。计算中桥面板系按正交异性板工作,采用变带宽一维数组贮存、系数矩阵分块与子结构相结合的方法。文中对计算结果和模型试验作了对比分析,同时还就不同支承条件的空间分析结果作了比较,供实际设计时参考。
The literature [1], [2] analyzed the mechanical properties of the space structure for the symmetrical load of the steel plate girder composite steel bridge model, and the literature [2] also analyzed its structural mechanical properties under partial load. In this paper, the fixed support can be freely rotated around the y-axis, and the remaining five degrees of freedom are completely constrained. The spatial analysis of the support under the vertical partial load can be considered depending on whether the movable support can rotate around the y-axis and move along the x-axis. The calculation of the middle bridge deck is based on the work of Orthotropic plates, using variable bandwidth one-dimensional array storage, coefficient matrix block and sub-structure combination method. The results of the calculation and the model tests are compared and analyzed. The spatial analysis results of different support conditions are also compared for practical reference.