摘要
稳定分析是斜拉桥设计的重要组成部分。澳凼三桥稳定分析按特征值屈曲问题处理,分别采用整体和局部有限元模型,分析了施工、运营2个工作阶段、6种荷载工况及塔、梁相交处不同边界条件下结构的稳定。指出澳凼三桥在预期的荷载作用下,结构的整体失稳首先发生于桥塔;箱梁局部失稳首先发生于箱梁顶板;塔、梁相交处不同边界条件对其稳定安全系数影响很大。
Stability analysis is an important part in the design of cablestayed bridges. In this paper, the analysis of the 3rd MacauTaipa Bridge is performed in line with eigenvalue buckling, in which the structural stability of the Bridge at two stages of construction and operation, and under six loading cases and different boundary conditions at the joint areas between pylons and girder are analyzed respectively with global and local finite element models. The results indicate that under the expected loads, the global instability of the Bridge will firstly appear in the pylons, the local instability of the box girder will firstly appear in top slab of the box girder, and the different boundary conditions between the pylons and girder have significant influences over stability safety factors of the Bridge.
出处
《桥梁建设》
EI
CSCD
北大核心
2003年第5期23-26,共4页
Bridge Construction
关键词
斜拉桥
有限元法
稳定分析
安全系数
cable-stayed bridge
finite element method
stability analysis
safety factor
