Dynamic Response's Numerical Analysis Of The Subway Station Structure Under Seismic Loading

with the development and use of underground space, all kinds of underground great span structure also unceasingly emerging, for example, underground market, underground parking, underground warehouse ,subway station and so on., however, our country is on the link Pacific Ocean earthquake belt, the seismicity is frequent and intense, where is the biggest active area of mainland potential and strong earthquake of mainland in the world, therefore, earthquake resistance question of underground structure is outstanding in our country .Subway station as an important underground structure facility ,its security danger people's life and property directly ,so this article has conducted research on power response question of subway station structure in earthquake load function through the numerical calculus, and obtained the stress and the displacement of responds the rules and destruction character of the station structure, which has the certain guiding sense for the design and the construction of underground great span structure. The prime task is as follows:1. Using elastic-plasticity theory, considering the material misalignment and the contact misalignment of soil and structure, defining this constitutive models of soil and structure ;2. Establishing model of finite element numerical analysis , according to numerical simulation result's contrast of the large-scale shake table experiment, defining the method feasibility of using the model ,the boundary treatment ,the question false and so on by numerical analysis ;3. Selecting the typical subway station which is building as the object of study, uses the different direction seismic motion input, like horizontal, vertical, horizontal and vertical coupling earthquake function, different burying depth like 3m, 10m and 20m, analysising structure responds under the different operating mode's stress response and the displacement, obtaining the power response character of the structure.The research results indicated that structure power response's influence is great in the vertical earthquake function, not allow to neglect. We should consider the level and vertical coupling earthquake function when designing. In certain range of burying depth situation, the structure power response increases along with the burying depth and the structure displacement response has certain regularity, which displays decreasing along the structure elevation increasing. The stress is not obvious along with the rules, but the stele and various nodes are the stress concentration places ,so we should give to take seriously.