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  Research on Rapid Calculating Method of Seismic Analysis of Immersed Tunnel

  Seismic performance of the immersed tunnel as long underground structures is similar to the pipelines. In the action of earthquake, the dynamic response and stability is determined by the surrounding soils, not the structures. But the deflection of structures should be coordinated with the soil. It is very important to know appropriate history of ground failures in past earthquake such as dislocation by fault, sliding of slope, liquefaction of loose sand and so on. ground displacement should be paid more attention when topography and geology is changed along the immersed tunnel axis. So the above dangerous areas should be avoided.

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