Abstract: The seismic performance of soil-column-free large-span metro station is of great significance. Hence, vibration platform test is carried out on Jinqiao Station of Nanning Metro Line No. 5. The boundary effect of soil-metro station vibration platform test is verified and the acceleration response laws of structure model and the soil under the action of earthquake are analyzed. The results show that: (1) The boundary of the polystyrene foam board on the model box wall can eliminate the reflection and scattering of the waves on the boundary, whose effect is good. (2) As for the model foundation, the acceleration response decreases with the increase of burial depth. (3) Under the action of horizontal seismic, the peak acceleration response of the roof is the largest, followed by that of intermediate plate, and that of the floor is the smallest. The seismic damage observation shows that the foundation of the model is partially damaged, and there are many micro-cracks in the roof and side wall and connection of intermediate plate of the station structural model.

Key words: soil-column-free large-span metro station, structural model, vibration platform test, seismic response