Vibration Measurement and Comfort Study of Wuhan Railway Station Under Multi-vibration Sources
To investigate the floor slab's vibration response to individual and combined actions of vibration sources,such as those from subway,high-speed trains,and pedestrians within the terminal,Taking Wuhan Railway Station as an example,on-site vibration measurements of the station hall floor are conducted;Com-bined with the standard JGJ/T 170-2009,the vibration comfort of the station hall floor is evaluated.The con-clusions are as follows:(1)Time domain analysis:the vibration generated by the train is amplified at each struc-tural column when it is transmitted to the station hall floor;The influence of the number of vibration sources on the horizontal acceleration is greater than that on the vertical acceleration;The vibration transmission character-istics in one span of the station hall floor can be approximately calculated by the decline of quadratic function.(2)Frequency domain analysis:the vibration frequencies of the station hall floor are concentrated in 0～100 Hz;With the change of the distance between the measuring points,the high-frequency components attenu-ate obviously,but the low-frequency components at 10～20 Hz do not attenuate obviously with the increase of the distance.(3)Vibration comfort evaluation:the vibration comfort of the hall floor of Wuhan station meets the specification requirements,but for the personnel working in Wuhan station,long-term exposure to the vibra-tion environment will still have some impact on their body and mind.The study has certain guiding significance for the design of new comprehensive transportation hubs and the normal operation and maintenance of existing transportation terminal.
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