Analysis On Underground Railway Under Seismic Dynamic Response

With the development of urbanization, worsening of urban traffic and the environmental conditions, there is growing recognition that the development of an underground railway as the backbone of the city's fast urban public transport system is the solution to the problem of passenger traffic. At the same time, because our country is located in Europe and the Pacific Ocean between seismic zone,as an earthquake country with a wide distribution area of earthquake.It become an important topic that study on seismic performance of underground. There are station and tunnel for the subway, the seismic performance of these two structures is greater difference. It is the key that the influence factors of the seismic performance and optimum structure form for these two kinds of structure.In response to these problems, based on the study of the characteristics of the underground seismic damage and the example of damage both at home and abroad,having a numerical simulation of the dynamic response of the subway station and the tunnel, this paper analyzes the influence on seismic performance of the underground railway above the form of structure and span. In this paper, the main studies in the following are:1. The destruction of subway station and the tunnel;2. Proposed seismic performance of weakness in the subway station,and give some suggestions about Strengthening measures;3. Summarized the influence law of seismic performance of subway station under the form of structure and span from displacement and internal force;4. Summarized the influence law of seismic performance of the tunnel under the form of section from displacement and internal force,and proposed the most perfect form of section on the tunnel.The outcome of these conclusions may not fully mature, but I hope it can play a role for the Underground Railroad in the actual project to improve seismic performance of the proposal.