Investigation on influences of metro station structures on environmental vibration induced by railway traffic

Considerable attention has been drawn to the environmental vibration induced by railway traffic in rail transit design. The numerical modeling strategies of metro station used for predicting the railway traffic induced environmental vibration were studied, and the practical analytic model as well as the methods of the related parameter identification were presented. Based on a proposed metro station project, a quasi-three-dimensional station dynamic structure-soil interface FEM model for the station was established to investigate the influence of station structure on the environmental vibration induced by railway traffic. Three different station structures with composite walls, compound walls and separated walls respectively were analyzed and compared in time history responses, 1/3 octave spectra and attenuation tendencies of peak acceleration. The results show that separation of lined wall and retaining wall can reduce the environmental vibration and station with separated-wall is the optimal solution for the area having high limitation of the environmental vibration. ©, 2015, Chinese Vibration Engineering Society. All right reserved.