| China is in the era of development of underground railway transportation at a highspeed. The last century, people do not pay enough attention to the importance ofunderground structure security, when the earthquake occurred, the underground structureis not easy to damage for the soil has the restriction effect. Now, there are few researchesabout underground structure. Addressing these issues, relevant researches are carried outin order to provide the basis for seismic analysis of the underground structure.The main researches of underground structure and existing issues are summarized onthe basis of seismic analysis method for underground structure at domestic andinternational, the purpose of this paper is made clear. Numerical analysis of tunnel andstation under seismic is accomplished, key issues in the research such as the constitutivemodel of soil, artificial boundary conditions, input methods of seismic waves and theinteraction of soil-structural are discussed. The influence of different factors such aslayered soil, the distance and depth of subway tunnel, the size and location of subwaystation, reinforcement program of lining and different seismic waves are also taken intoaccount. Analysis software of underground structure under seismic is developed base onMFC. Finally, some conclusions of underground structure under seismic are gotten andthe prospects for future work are studied out.The results showed that the peak stress of lining occurred at the part of hance, archfoot and spandrel; the type of seismic waves make a big difference to the dynamicresponse of tunnel, but the lining stiffness is the opposite; the node acceleration on thesoil surface is amplified; the most story drift angle of subway station under seismic is inthe standard range; the peak stress occurred at the end position of the column; the stress concentration appeared at the connecting parts of skirt board and plate, station structureand lining. |
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