Seismic Research Of A Subway Station Based On The Response Displacement Method

Urban subway has the advantage of fast,environmental protection, large capacity and so on, which has been the the most important form of urban public transportation.China is a country with frequrnt earthquake,with the increase in the number of underground structures, earthquake damage become more and more serious.Compared to the floor structure,the damage data of underground structures is relatively less, and with the diverse forms of subway station,it must be raised a higher demand to the underground structure performance. Because of designers doubts in the design of variable cross section, it has theoretical and practical significance for the law section and the internal forces between the different subway stations.The paper studied seismic analysis methods and other issues of the subway station, taking a subway station as the background, based in Shijiazhuang strata and subway construction conditions. It will analysis, summarized and classified to the seismic design methods of underground structure at home and abroad. Using ABAQUS finite element software, based on the response displacement method to analysis the stress distribution of different sections under the action of earthquake, summrizes the universal rule of different sections. The specific contents and results are as follows:(1)The standard segment of subway station, the section of the opening hole and the interface section of the duct were conducted by internal forces and deformation analysis, based on the response displacement method.(2)The axial force of the section of standard segment was great in the bottom and little in the top in the vertical direction and in the horizontal the middle of two columns was great and the sidewall bottom was the little. The maximum shear force and bending moment were in the bottom of the sidewall.(3)Layer displacement between the different sections of the subway struction was great in the top and little in the bottom. The absolute level of displacement and drift angle of the section of the opeaning holes between the different sections were the biggest.(4)Under the action of the multiple and rarely earthquake, the section of opening hole compared with other sections, the internal forces and deformation were bigger. It should take appropriate measures to strengtn the local position when designing.