Abstract
To improve the utilization of land resources, in recent years, there has been an increase in the design and construction of over-track buildings in metro depots in China. However, there are daily tasks such as testing, parking, and maintenance of metro trains in the depot, vibration induced by trains in those tasks may exert impact upon the residents living in the buildings over the metro depots. In this paper, detailed on-site measurements were carried out to investigate the source and transmission characteristics of train-induced vibrations in the metro depot. The main results indicated that (i) the magnitudes of train-induced vibration on the testing lines and throat areas are greater than other areas, and the issue of environmental vibrations induced by trains in the building near these areas need to be given more attention. (ii) Train-induced vibrations are more attenuated from the ground to the platform and less attenuated from the platform to the building floor, and most vibration acceleration levels below 30 Hz are even amplified during the transmission from the platform to the floors in the building, which could be because of the matching of the frequencies of train-induced vibrations and the natural frequencies of the superstructure.
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