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《中国工程科学》 >> 2011年 第13卷 第9期

大跨度桥梁抗风技术挑战与基础研究

同济大学土木工程学院桥梁工程系,上海 200092

资助项目 :国家自然科学基金重大项目(59895410) 收稿日期: 2011-01-04 发布日期: 2011-09-15 10:02:07.000

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摘要

以我国30年大跨度桥梁的快速发展为研究背景,对3种大跨度桥梁的抗风技术挑战进行了基础性研究和应用性研究,着重探讨了悬索桥的颤振性能及其控制、斜拉桥风振性能与拉索风雨振控制、拱式桥涡激共振及其控制、特大桥梁风振精细化理论等一系列抗风关键问题。研究结果表明:悬索桥的颤振稳定性跨径上限约为1 500 m,超过甚至接近这一上限时,必须采取措施改善加劲梁的抗风稳定性;千米级大跨度斜拉桥仍具有足够高的颤振临界风速,其主要抗风问题是长拉索的风雨振动;大跨径拱桥除了个别有涡振问题之外,还没有受到结构抗风性能的影响。文章还提出了三维桥梁颤振精确分析的全模态方法、任意斜风作用下桥梁抖振频域分析方法、基于二阶矩理论和首次超越理论的桥梁颤振和抖振可靠性评价方法,揭示了桥梁颤振演化规律、驱动机理和控制原理。

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参考文献

[ 1 ] 项海帆,葛耀君,朱乐东,等.现 代 桥 梁 抗 风 理 论 与 实 践 [M]. 北京:中国交通出版社,2005.

[ 2 ] Ge Yaojun,Xiang Haifan.Great demand and various challenges— Chinese major bridges for improving traffic infrastructure nation‐ wide[C]//Keynote Paper in Proceedings of the IABSE Symposium 2007 on Improving Infrastructure Bringing People Closer World‐ wide.Weimar,Germany,2007:9 -12.

[ 3 ] Ge Yaojun,Xiang Haifan.Aerodynamic challenges in long‐span bridges [C ]//Keynote paper in Proceedings of the Centenarey Conference of Institute of Structural Engineering. Hong Kong, China,2008:89 -109.

[ 4 ] Xiang Haifan,Ge Yaojun. On aerodynamic limit to suspension bridges [C]//Keynote Paper in Proceedings of the 11 th Interna‐ tional Conference on Wind Engineering.Texas,USA,2003:81 - 95.

[ 5 ] Ge Yaojun,Tanaka H.Aerodynamic flutter analysis of cable‐sup‐ ported bridges by multi‐mode and full‐mode approaches[J].Jour‐ nal of Wind Engineering and Industrial Aerodynamics,2000,86: 123 -153. 链接1

[ 6 ] Ge Yaojun,Tanaka H.Aerodynamic stability of long‐span suspen‐ sion bridges under erection[J].Journal of Structural Engineering, ASCE,2000,126:1404 -1412. 链接1

[ 7 ] Xiang Haifan,Ge Yaojun.Refinements on aerodynamic stability analysis of super long‐span bridges[J].Journal of Wind Engineer‐ ing and Industrial Aerodynamics,2002,90:1493 -1515. 链接1

[ 8 ] Zhu L D,Xu Y L.Buffeting response of long‐span cable‐supported bridges under skew winds [J].Journal of Sound and Vibration, 2005,281(1 -3):647 -697.

[ 9 ] Zhu L D,Xu Y L,Xiang H F.Tsing Ma bridge deck under skew winds‐Part II:Flutter derivatives[J].Journal of Wind Engineering and Industrial Aerodynamics,2002,90(7):807 -837. 链接1

[10] Ge Yaojun,Xiang Haifan,Tanaka H.Application of a reliability analysis model to bridge flutter under extreme winds[J].Journal of Wind Engineering and Industrial Aerodynamics,2000,86: 155 -167. 链接1

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