无背索斜塔斜拉桥的稳定性分析

An Analysis of Stability of Cable-stayed Bridge

以长沙市洪山大桥为工程背景,采用每个单元有14个自由度的梁段单元,根据薄壁杆件力学及势能驻值原理推导了其单元刚度矩阵,并对无背索斜塔斜拉桥主梁的稳定性进行了分析.

Based on the Changsha Hongshan Bridge project, this paper exploits an beam element which has fourteen displacement parameters. According to the theory of thin-walled beam and the minimum potential energy principle, the element rigidity matrix is obtained, and further analysis on stability of the main girder of the cable-stayed bridge is also given.