Vibration Effect Simulation Analysis of Superstructure in Xinzhuang Hub Project

Abstract:

In order to study the vibration effect generated by rail vehicles transiting on the adjacent buildings of Hu Hang railway passenger dedicated line in Xinzhuang Station pivotal project, Xinzhuang Station half space integration finite element model was established. According to loading analysis model for the train vibration and mathematical expression, wheel rail force was calculated through field test rail acceleration data of Hu Hang railway passenger dedicated line. Simulating and analysis vibration level of Hu Hang railway passenger dedicated line adjacent buildings, under ballast track and with additional isolation base working condition. The result shows that in the case of ballast track, vibration influence on T17 adjacent serviced apartment, at a distance of 10m from track, generated during Hu Hang railway passenger dedicated line operation is significant, and the VLzmaxis 79.68 dB; vibration influence on T17 adjacent residential building, at a distance of 97 m from track, is small, and the VLzmaxis 59.1 dB. Under the condition of addition isolation base structure, the VLzmax of T17 adjacent serviced apartment is 62.96 dB, reducing 16 dB relating to ballast track condition, and the vibration isolation effect is significant. By applying additional isolation base structures, the VLzmax values of different floors in the two building decreased effectively, national and local standards were satisfied.