（同济大学桥梁工程系, 上海 200092）

［摘要］根据斜拉桥一阶纵漂的运动特征，建立相应的概念简化模型，进行一阶纵漂频率的近似计算。根据工程实例说明两个简化模型分别可以应用的工程情况，且具有较高的精度。对影响斜拉桥一阶纵漂频率的相关因素进行讨论，从概念上说明主梁的总体质量在频率计算中并不是最为关键的因素，而拉索的布置状况对其频率大小起着决定性作用。

［关键词］斜拉桥； 一阶纵漂； 塔索； 周期

中图分类号：U442.5    文献标识码：A    文章编号：1002-848X(2015)03-0093-04

Discussion on simplified concept calculations and influencing factors of

a cablestayed bridge floating frequency

Yang Huaiyu, Li Jianzhong

 (Department of Bridge Engineering, Tongji University, Shanghai 200092, China)

Abstract:According to the first order  floating motion features of a cablestayed bridge, a simplified concept model was  established and the approximate calculation of firstorder longitudinal drift frequency was made. According to the engineering practical example, it is illustrated that the two simplified models can be applied in different project situations respectively, and have high precision. Related factors influencing  first order longitudinal drift frequency of  cablestayed bridge were discussed, which can conceptually demonstrate that the overall quality of girder in frequency calculation is not the most crucial factor, and layout of the tower cable plays a decisive role in the frequency size.

Keywords:cablestayed bridge; first order longitudinal drift; tower cable; period

*国家重点基础研究发展计划（973）项目（2013CB036302）。

作者简介：杨怀宇，博士研究生，Email：yhy20060507@sina.com。

参考文献

［1］项海帆，李瑞森，杨昌众. 悬浮体系斜张桥的近似抗震计算［J］. 结构工程师，1986 (1) : 6469.

［2］袁万城，闫冬. 斜拉桥纵飘频率简化计算方法［J］. 同济大学学报：自然科学版，2005，33(11)：14231427.

［3］李国豪. 桥梁结构稳定与振动［M］. 北京：中国铁道出版社，1996.

［4］RAY W CLOUGH, JOSEPH PENZIEN. Dynamics of structures［M］. Computers & Structures, Inc., 2003.

［5］钱培风. 结构动力学［M］. 北京：中国工业出版社，1964.

［6］ZOU D, JI T. Dynamic characteristics of a generalized suspension system［J］. International Journal of Mechanical Sciences, 2008,50(1)： 3042.

［7］季天健，ADRIAN BELL. 感知结构概念［M］. 北京：高等教育出版社，2009.