Analysis of Structural Seismic Response of Large-scale Cross-crossing Metro Stations
In this paper,the seismic response analysis of underground structures of actual projects is carried out by numerical simulation.With the background of a cross-interchange underground station project in a soft soil site in Tianjin,four numerical models,namely,crossing system(Cr),single station(Ss-2),single station(Ss-4)and free field(Ff),are established to investigate the similarities and differences of the seismic response of cross-interchange underground station and single station in soft soil site by changing the seismic wave types and amplitudes.The results show that:compared with the monolithic station structure,the cross-over station system has a more obvious inhibition effect on the acceleration amplification effect of the soil;the displacement,stress and acceleration of different station models are different,and the response law of different stations with the same model is also different;when the rare earthquakes come,the interchange section of the station is prone to be destabilised and damaged,and the stability of the interchange station is better than that of monolithic station in general.
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