空间缆索悬索桥主缆线形的分析方法

空间缆索悬索桥是由于主缆和吊索形成了一个三维索系，在对竖向承载能力影响不大的情况下，缆索系统的横向承载能力得到显著提高，从而大大提高了整个桥梁的横向刚度和抗扭刚度。作为结构非线性性态非常突出的大跨度悬索桥，采用有限元法能充分考虑几何非线性的影响因素。介绍了按照零位移原则确定重力作用下主缆的初始应力状态的方法及确定主缆线形的迭代算法。

Cable Shape Analysis of Suspension Bridge with Finite Element Method

Due to three dimensions system of cable and rope,three dimensions suspension bridge increase the cross supporting force without influence to perpendicular supporting force.So it raise the cross and torsion rigidity.Given to the nonlinear behaviors,using finite element method can take it into account fully.We introduce the zero method principle which can calculate initial stress while gravity act and the iterative method which can determine the cable shape.