摘要
缆索支承桥梁是21世纪跨海连岛大桥的主要结构型式,结构轻柔,风作用下的结构稳定性问题非常突出.以1 400 m主跨的悬索桥、斜拉桥以及吊拉组合体系桥等缆索支承桥梁的主要结构型式为例,采用三维非线性抗风分析方法,进行了动力特性、空气静力和动力稳定性的分析和比较.结果表明:吊拉组合体系桥刚度大,抗风稳定性好,是一种抗风性能良好的缆索支承桥梁结构型式.
The cable-supported bridge is a kind of structural system suitable for the sea-crossing bridges in the 21^st century. Due to its great flexibility, therefore it becomes very susceptible to the wind action. By taking the suspension bridge, cable-stayed bridge and cable-stayed-suspension hybrid bridge with main span of 1 400 m as examples, the dynamic characteristics, aerostatic and aerodynamic stability are investigated and compared by 3D nonlinear wind-resistant analysis. The results show that the cable-stayed-suspension hybrid bridge has greater structural stiffness and better wind-resistant stability, and becomes a kind of cable-supported bridge with good wind resistance.
出处
《浙江工业大学学报》
CAS
2008年第1期98-101,共4页
Journal of Zhejiang University of Technology
关键词
缆索支承桥梁
动力特性
空气静力稳定性
空气动力稳定性
cable-supported bridge
dynamic characteristcs
aerostatic stability
aerodynamic sta bility
