大跨悬索桥的几何非线性分析

The Geometrical Nonlinear Analysis of LargeSpan Suspension Bridge

从更改的拉格朗日列式法导出的几何非线性方程出发，对于缆索采用具有较小抗弯刚度参数的梁单元，对悬索桥的施工过程及使用阶段进行了全过程的几何非线性分析，绘制了完整的Ｐ－δ曲线．

From the geometrical nonlinear equation derived from the changed Lagrand equation,beam element with small EI was used for the analysis of cable.Based on geometrical nonlinear fullprocess analysis of suspension bridge under construction and in use,full Pδ curve was given in this paper.