Measurement and Theoretical Analysis of Vehicle-Induced Vibration on Elevated Railway Station

In order to study the environmental vibration in different regions of elevated stations, measuring points for measuring the vibration in three directions (x, y, and z) were deployed to the mid-span of track beam, office, and waiting room of an elevated station in a passenger dedicated railway. When high-speed EMUs (electric multiple units) passed the elevated station at the main line speed, the environmental vibration in different regions of the station was tested, and experimental data on the time histories, levels, and frequency spectra of vibration accelerations were analyzed. According to the vehicle-track-bridge coupling theory, the dynamic response of the track beam and the running performance of trains were investigated. The results show that the Z-weighted vibration level of the office reaches 80.7 dB, 0.7 dB higher than the code limit; and the vertical vibration dominates the environmental vibration of the elevated station. The duration of the vertical vibration at office center is 15% longer than that of the horizontal vibration; and the duration of the horizontal vibration of the waiting room is 1.03 s longer than that of the track beam. In addition, the high-frequency vibration attenuates faster than the low-frequency vibration during the propagation from the track beam to the station floor.