Field monitoring of railroad embankment vibration responses
in seasonally frozen regions |
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Authors: | ZiYu Wang XianZhang Ling Feng Zhang LiNa Wang ShiJun Chen and ZhanYuan Zhu |
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Institution: | School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;1. School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China
2. State Key Laboratory of Frozen Soils Engineering, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;School of Civil Engineering, East China Institute of Technology, Nanchang, Jiangxi 330013, China;Urban and Rural Construction College, Sichuan Agricultural University, Dujiangyan, Sichuan 611830, China |
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Abstract: | To investigate the vibration characteristics of a railway subgrade in different seasons, three field experiments were carried out in
the seasonally frozen Daqing area of China during spring, summer, and winter. The vibration characteristics and attenuation rates
of the subgrade induced by passing trains were investigated, and the influences of the season, train speed, train type, train load, and
number of train compartments are described in this paper. The results show that: (1) near the rail track the vibration in the vertical
direction was more significant than in the lateral and longitudinal directions, and as the distance from the railway track increased,
the acceleration amplitudes and the attenuation rates all decreased in all three directions; (2) the acceleration amplitudes and attenuation
rates decreased in the three different study seasons as the distance from the railway track increased, and the attenuation
rates in the freezing period were the largest; and (3) the acceleration amplitude induced by a freight train was greater than that by a
passenger train, and the subgrade vibration increased with increasing passenger train speeds when the number of train compartments
was similar. These results have great significance for enhanced understanding of the characteristics of train-induced vibration
embankment response in seasonally frozen regions, and provide essential field monitoring data on train-induced vibrations in
order to improve the performance criteria of railroading in seasonally frozen regions. |
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Keywords: | seasonally frozen region train-induced vibration field monitoring acceleration vibration characteristics time histories |
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