Studies on dynamic behavior of the Subway Station influenced by down-through tunnel during strong seismic

The project of the south-to-north water transfer whose tunnel down-through Wukesong Subway Station is taken as a background in this paper. Firstly, some 3D dynamic model are established while considering the soil-structure interaction, adopting D-P model and selecting Rayleigh damping and viscous-elastic artificially boundary conditions. Then, such contents as internal forces, deformations and their time-history changes at the points in the existed metro station are studied in detail under strong earthquake. The final results show that maximum displacement of the monitor point is smaller than the size of the station structure during strong seismic, and the peak of internal force is markedly. The value of the maximum displacement and internal force of monitor node and occurrence time is largely related with the peak acceleration of seismic wave input, whose part of the time-history internal force exceed the allowed capacity of the structure, the column bias damage as bend and force, the station roof and floor easy happening bend destructive. Section changes place happening easily shear failure as stress concentration. The relative displacement value of structure component on both ends is the main factors affecting the structure of normal use that cannot to be ignored. Research results can be used for reference for design, construction and safety assessment for similar structure.