Difference of bridge damping ratio under different excitations

被引：0
|
作者：
Li Z. [1 ]
Li P.-F. [1 ]
Jiang Z.-Y. [1 ]
Wei H. [1 ]
机构：
[1] Research Institute of Highway Ministry of Transport, Beijing
来源：
Li, Peng-Fei | 1600年 / Chinese Vibration Engineering Society卷 / 35期
关键词：
Bridge; Damping ratio; Excitation; Free decay method; Half-power bandwidth method;
D O I：
10.13465/j.cnki.jvs.2016.03.010
中图分类号：
学科分类号：
摘要：
The data of the damping ratios of structure were collected and analyzed. The limitations on the current researches on the bridge damping ratio were pointed out. In order to make up the limitation of the lack of data of the damping ratios of bridges, three bridges damping ratios were tested. The damping ratios of bridges scatter under the influences of the bridge type, excitation status, calculation method and test environment. With the increase of excitation intensity, the damping ratios of bridges increase significantly. The damping ratio tested under vehicle excitation is larger than that under ambient excitation. Under the same excitation, the damping ratio calculated by the half-power bandwidth method is more widely scattered than that by the free decay method. The test of the bridge damping ratio should be carried out under the same excitation status to ensure the test accuracy. © 2016, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：62 / 67
页数：5
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