Numerical Analysis Of The Seismic Response Of The Subway Station Structure Based On The Soil-underground Structure Interaction

In recent years the development of large capacity underground rapid transit,especially the subway station have become the key to resolving traffic conflicts in metrocities, also it is the inevitable road to a sustainable city. However, the structure of thesubway station as an important facility, once suffered earthquake in damage, it willcause serious casualties and property losses. However, currently on the seismic designof the subway station only had been made some provisions in principle, the lack of asound theoretical analysis system. Given the above, in this article combined withspecific project examples, create a calculated value subway station structure based onsoil-structure interaction model and the finite element software separately calculatedstatic and dynamic calculations. Considering the seismic responses of subway stationstructures in horizontal, vertical and horizontal-vertical coupling arrive at some of thebasic rules of the system under earthquake actions by comparing and analyzing theresults of the various conditions.The results shows, the seismic response of horizontal-vertical coupling earthquakeare close to the horizontal earthquake, but its value are improved. The horizontalcomponent of seismic plays a dominant role in the stress response of the system,resulting in horizontal shear failure and horizontal relative displacement, but the verticalcomponent of seismic should also be taken into account, otherwise the seismic design ofthe system is unsafe. Seismic about the nodes of which the top and bottom of thecolumn, walls and floor layers have lager response than other parts of the structure, so this should be paid more attention in the engineering design. Moreover, enteringdifferent characteristics of seismic waves has a great influence on seismic response.Even though increasing the elastic modulus or density of the main structure material canenhance the seismic performance of the structure, but the effect of reducing thestructural deformation under seismic was not large, and increasing the elastic modulusof the surrounding soil can reduce the seismic performance of the structure obviously.Therefore, in the engineering an appropriate increase in ductility of the structure shouldbe considered in design, with the deformation of the surrounding soil to reduce seismicresponse of structures.