摘要
悬索桥在施工过程的结构刚度比较小,空气静力作用产生的非线性效应以及桥面主梁架设方法都将对悬索桥施工过程的颤振稳定性产生重要的影响。运用大跨度桥梁颤振分析的三维非线性方法,分析宜昌长江大桥采用不同主梁架设方法时的颤振稳定性变化趋势,并探讨静风效应和主梁架设方法对悬索桥施工过程颤振稳定性影响的程度、机理和规律。
Structural stiffness of suspension bridge under erection is low so that its flutter stability is remarkably affected by the nonlinear effect due to the static wind action and the deck erection sequence.Taking the Yichang Bridge over Yangtze River as example,evolutions of flutter stability with the deck erected by different sequences are determined by three-dimensional nonlinear flutter analysis,the role and mechanism of the static wind action and erection sequence in flutter stability of suspension bridges under erection are investigated and discussed in the paper.
出处
《公路交通科技》
CAS
CSCD
北大核心
2004年第5期57-60,共4页
Journal of Highway and Transportation Research and Development
基金
浙江省自然科学基金资助项目(502118)
中国博士后科学基金资助项目(2002031245)
关键词
悬索桥
施工过程
颤振稳定性
静风效应
架设方法
Suspension bridges
Erection stage
Flutter stability
Static wind action
Erection sequence
