A swinging self-resetting damping system and construction method for center columns of underground stations

Abstract

The invention discloses a swinging self-resetting damping system and a construction method for the central column of an underground station. The fixed connection method of the roof and the bottom plate is changed to a contact hinged connection between structures and connected into a whole form through unbonded prestressed steel strands, so that the structural connection nodes are changed from fixed connection to hinged connection, making the central column a controllable Sway shock-absorbing components; at the same time, the self-resetting function of the structure can be realized under the action of the superstructure load and the elastic restoring force of the unbonded prestressed steel strand; the energy-dissipating steel plate plays the role of energy dissipation and shock absorption, and the prestress The method of setting holes makes the stress evenly distributed in the plate, which is beneficial to make the multi-regions of the energy-dissipating steel plate enter the plastic state and improve the energy-dissipating effect; It can not only limit the slippage of the column end, but also prevent the unbonded prestressed steel strand from being sheared.

Description

technical field [0001] The invention relates to the field of anti-seismic technology of underground stations, in particular to a swing self-resetting shock-absorbing system and construction method for central columns of underground stations. Background technique [0002] With the growth of population and the acceleration of urbanization, the development and utilization of underground space has become an effective way to solve the current urban land shortage and relieve traffic pressure. However, because the earthquake resistance of underground structures has not received enough attention, the development of structural forms, design methods and theories of underground structures has been relatively slow. In recent years, especially the Great Hanshin Earthquake has caused serious damage to underground stations, improving the seismic performance of underground structures has become an urgent problem to be solved. [0003] According to the earthquake damage mechanism of the und...

AI Technical Summary

Problems solved by technology

However, due to the fact that the seismic problems of underground structures have not received enough attention, the structural forms, design methods and theoretical development of underground structures have been relatively slow.

Since the center column is consolidated with the top and bottom plates in the design of conventional subway stations, the center column will crack the concrete and yield the steel bars under the repeated action of the earthquake load, and the vertical bearing capacity will be reduced and crushed, resulting in structural damage

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