摘要
大跨度斜拉桥长拉索的长细比较大、自身阻尼较小 ,容易在周围环境激励下产生大幅振动 ,对斜拉桥的安全营运构成威胁。本文就目前存在的大跨径斜拉桥拉索的振动原因和各国采取的减振装置的特点作简要介绍 ,并以武汉白沙洲大桥采用的粘性剪切型阻尼器进行拉索振动控制为例 。
Long stayed cables of long-span cable-stayed bridge with large ratio of slenderness and low internal damping are prone to vibration due to ambient excitation, which threatens the safe working of cable-stayed bridge. This paper briefly introduces the reasons of long stayed cables vibration and the characteristics of vibration-controlled set adopted widely. Taking viscous-shear damper used in Wuhan Baishazhou Bridge as an example, the application of the damper sets on actual bridges is presented.
出处
《公路交通技术》
2003年第1期45-48,共4页
Technology of Highway and Transport
关键词
大跨径斜拉桥
拉索
振动
原因分析
减振装置
cable-stayed bridge wind-induced vibration vibration-controlled set stayed cable damper
