1. Hunan Provincial Key Laboratory of Wind Engineering and Bridge Engineering, School of Civil Engineering, Hunan University, Changsha Hunan 410082, China;
2. Guangxi Transportation Research Institute, Nanning Guangxi 530007, China
Influence of Central Buckles on the Modal Characteristics of Long-span Suspension Bridge
HU Teng-fei1,2, HUA Xu-gang1, ZHANG Wu-wei2, XIAN Qiu-shi2
1. Hunan Provincial Key Laboratory of Wind Engineering and Bridge Engineering, School of Civil Engineering, Hunan University, Changsha Hunan 410082, China;
2. Guangxi Transportation Research Institute, Nanning Guangxi 530007, China
摘要Finite element analysis (FEA) and dynamic test are employed to investigate the influence of central buckles on the modal characteristics of the Aizhai bridge. The FEA result shows that (1) the longitudinal floating frequency of the bridge can be significantly raised with central buckles; (2) the influence of central buckles on anti-symmetrical lateral bending frequencies is larger than that on symmetrical mode; and (3) rigid central buckles can raise the symmetric vibration modal frequencies of main cables, whereas the flexible central buckles nearly have no effect. Further test on the dynamic behavior of the aero-elastic model of the Aizhai bridge is conducted. The result indicates that (1) the anti-symmetric lateral bending modal frequencies increase with the increasing stiffness of the central buckles; (2) central buckles have slight influence on the vertical modal frequencies; and (3) central buckles can enhance the entire stiffness and natural frequencies of suspension bridges, especially for anti-symmetric torsional and longitudinal vibration frequencies.
Abstract：Finite element analysis (FEA) and dynamic test are employed to investigate the influence of central buckles on the modal characteristics of the Aizhai bridge. The FEA result shows that (1) the longitudinal floating frequency of the bridge can be significantly raised with central buckles; (2) the influence of central buckles on anti-symmetrical lateral bending frequencies is larger than that on symmetrical mode; and (3) rigid central buckles can raise the symmetric vibration modal frequencies of main cables, whereas the flexible central buckles nearly have no effect. Further test on the dynamic behavior of the aero-elastic model of the Aizhai bridge is conducted. The result indicates that (1) the anti-symmetric lateral bending modal frequencies increase with the increasing stiffness of the central buckles; (2) central buckles have slight influence on the vertical modal frequencies; and (3) central buckles can enhance the entire stiffness and natural frequencies of suspension bridges, especially for anti-symmetric torsional and longitudinal vibration frequencies.
基金资助:Supported by the National Natural Science Foundation of China(No.51278189; No.51422806)
通讯作者:
HU Teng-fei,E-mail address:tengfei_hu@126.com
E-mail: tengfei_hu@126.com
引用本文:
胡腾飞, 华旭刚, 张无畏, 鲜秋适. 中央扣对大跨悬索桥模态特性的影响[J]. Journal of Highway and Transportation Research and Development, 2016, 10(1): 72-77.
HU Teng-fei, HUA Xu-gang, ZHANG Wu-wei, XIAN Qiu-shi. Influence of Central Buckles on the Modal Characteristics of Long-span Suspension Bridge. Journal of Highway and Transportation Research and Development, 2016, 10(1): 72-77.
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2016, Vol. 10 
