A self-resetting shock-absorbing structure of center pillars and arc-shaped rubber bearings in assembled subway stations

Abstract

The invention discloses a fabricated subway station central column and arc-shaped rubber supporting seat self-resetting shock absorption structure. The fabricated subway station central column and arc-shaped rubber supporting seat self-resetting shock absorption structure comprises a subway station space composed of a precast top plate, a precast bottom plate, precast side walls and a precast central column, the joints of the precast side walls and the precast top plate and the joints of the precast side walls and the precast bottom plate are provided with arc-shaped rubber supporting seats enabling a whole structure to form 'hinge connection' from 'rigid connection' correspondingly, prestressed steel bars penetrating through the two edges of the arc-shaped rubber supporting seats and communicating with the precast top plate and the precast bottom plate are arranged in the left sides and the right sides of the precast side walls correspondingly, the two end tips of the prestressed steel bars are anchored and fixed through nuts, the precast central column is of an 'I-shaped' structure, the two end tips of the precast central column are connected with the middle of the precast top plate and the middle of the precast bottom plate through mortise and tenon joint structures correspondingly, through the mortise and tenon joint structures, under the action of an earthquake, the bending moment at the joint position between the central column and the station top plate and the joint position between the central column and the station bottom plate is released, and thus the damage to the station is reduced; and the central column is precast through steel cylinder concrete, the strength of the central column is greatly improved, deformation of the central column is reduced, and theearthquake resistance ability of the central column is improved.

Description

technical field [0001] The invention relates to the technical field of shock absorption for subway stations, in particular to a self-resetting shock-absorbing structure of an assembled subway station central column and arc-shaped rubber bearings connecting a prefabricated side wall, a prefabricated roof and a prefabricated floor of a subway station. Background technique [0002] With the rapid development of China's economy and the increasing urban population, urban traffic congestion and environmental problems have gradually become obstacles restricting urban development. The development of underground space resources and the construction of subways are one of the effective ways to solve urban traffic congestion. The subway has the characteristics of fast, efficient and clean, and its advantages are obvious. For subway stations, since most of the subway stations are located underground and are located in densely populated areas, once an earthquake strikes, it will bring a h...

AI Technical Summary

Problems solved by technology

Among them, Dakai Subway Station and Shangze Subway Station were most seriously damaged. More than half of the center columns were damaged in the earthquake. This earthquake has attracted widespread attention in the civil engineering field. Therefore, strengthening the shock absorption of the center columns is one of the key points. However, most of the existing patents deal with the center column simply by using rubber cushions, which lacks innovation.

In addition, at present, the connection between the side wall of the subway station and the roof and floor is mostly "rigid connection" method of on-site pouring, which has poor shock absorption effect. becomes hinged

However, when the existing patent changes "rigid joint" to "hinged joint", the variable displacement at the joint is uncontrollable, which affects the overall stability of the station and later repairs, such as Du Xiuli of Beijing University of Technology and others "a self-resetting assembled subway "Station Flexible Anti-seismic Structure" (Patent No. CN106351494A) uses a flexible system combining prestressed tendons and rubber bearings between the side walls, roof and floor. The seat has no radian, the force transmission is not reliable enough, the rotation is not flexible enough, it is not suitable for the structure to swing or open and close, and the self-resetting ability of the structure has room for improvement

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