铁道科学与工程学报2016，Vol.13Issue(10)：1962-1969,8.
考虑主塔刚度影响的三塔斜拉桥振动基频实用公式
Practical vertical frequency formula for vibration of cable-stayed bridges with three tower considering tower stiffness influence
摘要
Abstract
In order to calculate fundamental frequency of the cable -stayed bridges with multi -tower conveniently, the cable-stayed bridges with three tower was taken as research object. Frequency formula for vi-bration mode of cable-stayed bridges was induced by the Rayleigh method and vibration mode function of vertical free vibration of main beam and vibration type function of longitudinal free vibration of main tower were intro-duced. The practical vertical frequency formula for vibration of cable-stayed bridges with three tower considering tower stiffness influence was then derived. Finally, the presented theoretical formula of fundamental frequency was found to be valid in engineering and the frequency formula for vibration was discussed therein. The results in-dicate that section types of the girder, tower and cable has no influence on the vertical frequency formula for vi-bration of cable-stayed bridges, but the tower stiffness has a great influence on vertical frequency of cable-stayed bridges. The constrain condition and tower stiffness should be carefully considered in the calculation of fre-quency. The fundamental frequency calculated by the recommended method has a smaller error compared with the <br> finite element method ( FEM) result, which satisfies the requirement of conceptive design. The presented theoret-ical formula can be applied to the estimation of frequency for vibration of cable-stayed bridges with three tower.关键词
桥梁工程/三塔斜拉桥/主塔刚度/基频/实用公式Key words
bridge engineering/cable-stayed bridges with three tower/tower stiffness/fundamental frequency/practical formula分类
交通工程引用本文复制引用
陈恒大,邬晓光,姚丝思,郭飞..考虑主塔刚度影响的三塔斜拉桥振动基频实用公式[J].铁道科学与工程学报,2016,13(10):1962-1969,8.基金项目
国家自然科学基金资助项目(51308056) （51308056）
中国电力建设股份有限公司科技专项资金资助项目(2014-38) （2014-38）
中央高校基本科研业务费专项资金资助项目(201493212002) （201493212002）
