二力杆

超静定结构中求平面汇交二力杆系节点位移及轴力的方法

The Solution to Node Displacement and Axial Forces of Two-force Rods of Planar and Concurrent Forces

斜拉索静力分析的常用的方法有：解析法、二力杆法和有限元法。

Three methods often used in analyzing stayed cable are analytic method , equivalent two force members method and finite element method .

在结点荷载作用下等效矩形桁架结构模型内只有二力杆单元，单元受力、变形简单清晰，易于计算、观察和判断，并能满足工程精度要求。

There are only axial force link elements in the new model under nodal loads , thus the internal force and deformation of elements becomes simple and explicit to be calculated and judged easily .

目前在工程上对塔架进行有限元分析时，通常都是建立一个简化的模型进行计算，比如采用二力杆或梁单元对构件进行离散，而将节点等效为铰接或刚接。

At present , engineers mostly use a simplified tower model to do the finite element analysis , in which they use two-force bar or beam elements to discretize the beam components , and use hinged or rigid joints to model the nodes .