Research On Seismic Response Characteristics Of Subway Station And Its Overlying Building

With the rapid development of subway construction in China today, subway has been an important part in city operation. Therefore, its anti-seismic problems have been an important content of city anti-seismic engineering and disaster reduction research. The subway lines often cut across the prosperous business districts and there are numerous buildings near the subway station. When earthquake happens, the wave propagation will be altered by scattering and reflection, due to the existing of large subway station, and this will influence the seismic response of the overlying building; the vibration of the overlying building will lead to the complex wave field and additional stress field in rock mass, and this will influence the seismic response of the subway station structure. Besides, the soft interlayer in the foundation may alter the propagation of the earthquake wave dramatically and influences the seismic response of the subway station structure and the overlying building significantly. Based on the above issues, the mutual influence between subway station and overlying building on seismic response and the influence of soft interlayer on seismic response of subway station and overlying building are studied, respectively. The major contents are concluded as follows:â‘  A systematic study of the influence of subway station structure on seismic response of overlying building is performed. Firstly, the influence of subway station on the ground and surrounding rock motion in homogeneous rock mass is studied. Secondly, the influence of subway station on the seismic response of the overlying building is studied. Lastly, the influence of the factors such as the relative position of the subway station and the overlying building, the burial depth, the surrounding rock grade is studied.â‘¡ A systematic study of the influence of overlying building on seismic response of subway station structure is performed. Firstly, the influence of a 6 layer frame structure on seismic response of subway station structure is studied. Secondly, the influence of the factors such as the relative position of the subway station and the overlying building, the burial depth, the surrounding rock grade is studied.â‘¢ A systematic study of the influence of soft interlayer on seismic response of subway station structure and overlying building is performed. Firstly, the influence of the soft interlayer on the propagation of plane P wave and SH wave is studied, from the aspect that how the amplitude and energy of transmitted wave are influenced by incident angle and acoustic impedance ratio. Secondly, the influence of the soft interlayer in different position on seismic response of subway station structure and overlying building is studied.