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| APPROXIMATIVE FORMULAS OF CALCULATING PRIMARY FREQUENCIES FOR THREE-SPAN CONTIMUOUS GIRDER SUSPENSION BRIDGES |
| JU Xiao-hua |
| China Railway Construction General Corporation |
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Abstract Based on energy principles, the calculations of both the symmetrical and the antisymmetrical natural vertical and torsional frequencies of three-span continuous girder suspension bridges are obtained. The calculating formulas are predigested. Three three-span examples of suspension bridges are illustrated. The accuracy of the analysis is examined through comparative computation by means of the comparisons between the formulas and the finite clement approach. These approximative formulas can be used in process of the project choosing and the preliminary design.
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Received: 01 March 2003
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[1]Allan Larsen, Cowlconsult Niels J Gimsing. Wind Engineering Aspects of the Great Belt East Bridge Tender Project [A]. In: Eighth International Conference on Wind Engineering[C]. London, Canada. July 1991.
[2]小西一郎.钢桥(第五册)[M].戴振潘译.人民铁道出版社,1981.
[3]大桥局科研院.悬索桥[M].科学技术文献出版社,1996.
[4]范立础.桥梁抗震[M].同济大学出版社,1996.
[5]《公路桥梁抗风设计指南》编写组.公路桥梁抗风设计指南[S].人民交通出版社,1996.
[6]廖海黎,沈锐利.悬索桥三维自振特性分析[A].见:第一届全国索结构学术交流会论文集[C].无锡;1991.
[7]肖汝诚.吊桥结构的自振频率计算方法[J].华东公路,1991,(2).
[8]盛万定,袁万城,范立础.悬索桥振动基频的实用估算公式[J].东北公路,1996,(1).
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2003, Vol. 20 
