摘要
结构体系直接关系到斜拉桥的正常使用和抗震、抗风的安全性,特别对于跨径已经成功实现千米级突破的超大跨径斜拉桥,选择适应的结构体系尤为重要。分析了大跨径斜拉桥不同结构体系的受力特点,并选取对结构体系较为敏感的纵向风力,从塔、梁变形、塔底弯矩等结构静力响应控制指标出发,分析比较了跨径分别为1 088 m,1 308 m,1 500 m,1 800 m,2 100 m的五座斜拉桥在顺桥向静风荷载下的不同结构体系的静力响应,从顺桥向抗风性能角度提出千米级斜拉桥的适宜结构体系。
The structural system is directly related to the normal use, the earthquake resistance and the wind resistance of cable-stayed bridges. So it is significant to choose suitable structural system for the cable-stayed bridges with the span over 1 000 meters. The load-carrying behavior of different structural systems of superlong span cable-stayed bridges was analyzed. Through five examples of cable-stayed bridges with span over 1 000 m designed in the same background of Sutong cable-stayed bridge, the wind res...
出处
《结构工程师》
2009年第5期45-49,共5页
Structural Engineers
基金
国家科技支撑计划项目(2006BAG04B00)
苏通大桥建设关键技术研究
关键词
斜拉桥
结构体系
抗风性能
弹性约束
限位约束
cable-stayed bridge
structural system
wind resistance
elastic restraint
buffer restraint
