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介绍了用图论法计算变截面箱梁断面的扇性坐标.利用图论的基本原理建立箱梁断面的图论模型,并结合能量原理,推导出求解扇性坐标的矩阵方程.该法对于确定箱梁扭转中心位置和计算扇性坐标十分方便.给出示例的计算过程和结果,得出此方法非常适合于编程计算且计算结果准确.它使复杂的箱梁扭转计算问题得到简化.而且,用图论法还可以计算其他扇性特征参数.图论的应用,为解决箱梁扭转计算问题,编制通用的计算程序,提供了依据和参考.
This paper introduces the method of graph theory to calculate the fan-shaped coordinates of the section of box girder, establishes the graph theory model of box girder section by using the basic principle of graph theory, and deduces the matrix equation for solving fan- It is very convenient to determine the center position of the box girder and to calculate the fan-shape coordinates.Experimental results and calculation results show that this method is very suitable for programming calculation and the calculation results are accurate.It simplifies the complex calculation problem of box girder torsion , Graph theory can also be used to calculate other fan characteristic parameters. The application of graph theory provides a basis and reference for solving the calculation problem of box girder torsion, compiling general calculation program.