Abstract: In order to investigate the anti-seismic performance of subway station with 2 aboveground storeys and 1 underground storey in the loess area, the shake table test of the both aboveground and underground structure and the surrounding soil layer is carried out. Based on the brief introduction of model design and loading condition, the boundary effect of model soil box, dynamic response of model soil and model structure, and the soil-structure interaction are emphatically analyzed and discussed according to the data recorded by sensors in the tests. Test results show that the aboveground part of the model subway station with 2 aboveground storeys and 1 underground storey in the loess area will be subjected to the larger influence of peak ground acceleration of input earthquake. The final failure pattern of the aboveground part will be the overall sidesway collapse. The underground part of the subway station will be subjected to the larger influence of the soil around the underground structure. There will be no obvious damage in the underground structure when the displacement of surrounding soil is small. The interface part between aboveground and underground structure will be subjected to the worst damage. The model subway station structure will have little influence on the dynamic response of surrounding soil, and the influence will decrease with the increase of the peak ground acceleration of input earthquake.

Key words: loess area, subway station, aboveground structure, shaking table test, anti-seismic performance, soil-structure interaction