摘要
泰州长江公路大桥采用了三塔悬索桥体系,该结构体系与传统的双塔悬索桥存在较大的不同,尤其在中塔的设计方面。中塔的力学性能对全桥整体结构的有显著的影响。针对目前对三塔悬索桥中塔稳定研究较少的现状,以泰州长江大桥为研究对象,研究了三塔悬索桥的中塔稳定问题,重点进行了弹塑性稳定分析,并讨论了初始缺陷对结构整体稳定性的影响。研究结果表明,中塔初始缺陷对稳定系数影响较小,并且最不利稳定安全状态为横桥向风荷载作用。
Three-tower suspension bridge with two continuous main spans has been used in Taizhou Bridge,which is greatly different from traditional double-tower suspension bridge,especially in the design of middle tower.The mechanical properties of middle tower have remarkable influence on the entire bridge.However,there are few researches about the stability for the middle tower of three-tower suspension bridge.In this paper,Taizhou Bridge was investigated to study the stability of middle tower,and the emphasis is put on elastic-plastic stability.The influence of initial defect on the stability was discussed as well.The results indicates that the initial defect of middle tower has little influence on the stability coefficient and the worst case was lateral wind loading.
出处
《上海公路》
2009年第3期31-33,40,共4页
Shanghai Highways
基金
江苏省交通科学研究计划资助项目(08Y29-6)
关键词
三塔悬索桥
弹塑性
稳定性
稳定系数
初始缺陷
three-tower suspension bridge
elastic-plastic
stability
stability coefficient
initial defect
