Based on CR formulation superposition method for geometrical nonlinear analysis,the catenary cable element was used to simulate stay cable. Nonlinear influence for Sutong Bridge whose main span reaches 1 088 m during construction was studied.

• 基于几何非线性分析的CR列式全量法,采用悬链线索单元模拟斜拉索,分析主跨为1 088 m的苏通大桥施工过程几何非线性影响。