千米级斜拉桥纵向风作用适宜体系研究  

A Study on Suitable Structural System of Wind Resistance for Long Span Cable-Stayed Bridges

作　　者：陈倩茹[1] 马如进[1] 陈艾荣[1] 

机构地区：[1]同济大学桥梁工程系,上海200092

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

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...

关 键 词：斜拉桥 结构体系 抗风性能 弹性约束 限位约束 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]