计算平面桁架的内力,根据不同的桁架类型,有各种不同的方法,如:节点法、截面法、通路法、杆件代替法、图解法等等。然而,现有的这些方法,没有一个可以通用于所有的桁架。因此,当一个桁架的形状确定以后,究竟应该采用什么方法求解其内力,往往难于判断。有些方法,还要在进行了大量的运算以后,才能确定其结果的正确 Calculating the internal forces of the plane truss, according to different truss types, there are various methods, such as: node method, section method, channel method, rod replacement method, graphic method and so on. However, none of the existing methods can be applied to all trusses. Therefore, when the shape of a truss is determined, it is often difficult to judge what method should be used to solve its internal forces. Some methods, but also after a lot of calculations in order to determine the correct result