A seismic isolation structure with separate upper and lower floors inside a two-story station

Abstract

The present invention provides a seismic isolation structure in which the upper layer and the lower layer are separated in a two-story station, including a middle plate, a side wall and a center column, the side wall is connected to the middle plate through horn legs, the middle plate is connected to the Frictional sliding bearings are arranged between the horn legs; the longitudinal beam of the middle plate is connected with the top of the central column by lead core shock-isolation bearings. The seismic isolation structure in which the upper layer and the lower layer are separated inside the two-story station can greatly reduce the damage degree of the two-story subway underground station structure in a strong earthquake, thereby improving the overall seismic performance of the two-story subway underground station structure.

Description

technical field [0001] The invention relates to the technical field of shock-isolation structures in subway stations, in particular to a shock-isolation structure in which an upper layer and a lower layer in a two-story station are separated. Background technique [0002] Earthquake damage to existing underground structures can be traced back to the Great Kanto Earthquake in Japan in 1923. The water supply pipes in Tokyo were severely damaged in the earthquake, and cracks in the lining of the Nanwugu Tunnel spread throughout the tunnel (Yuan Yong et al., 2014). During the Great Tangshan Earthquake in 1976 in my country, the bases of many pillars in the underground clear water pool of Tangshan Beijiao Waterworks were shaken, the cement peeled off, and the steel bars were exposed. After the Mexico earthquake in 1985, researchers also observed some slight cracks in subway stations and tunnels. These cracks are mainly distributed in the connection between subway tunnels and stat...

AI Technical Summary

Problems solved by technology

However, the theory and method of active and passive control of seismic isolation structures based on the assumption of rigid foundations is difficult to apply to the specific requirements of seismic isolation of underground structures

At the same time, it is difficult to use seismic isolation devices to completely separate the underground structure from the surrounding foundation soil, and it is also difficult to reduce its seismic response by prolonging the period of the underground structure

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