Swing self-resetting damping system for middle column of underground station and construction method of swing self-resetting damping system

Abstract

The invention discloses a swing self-resetting damping system for a middle column of an underground station and a construction method of the swing self-resetting damping system. The swing self-resetting damping system is constituted by a top plate, a bottom plate, the prefabricated middle column, a pre-buried steel part and an energy dissipation steel plate; the traditional connection mode of fixed connection of the middle column, the top plate and the bottom plate is changed into the mode that the middle column, the top plate and the bottom plate are subjected to structure-contact-type hingedconnection and connected into a whole through unbonded prestressed steel strands, structure connection joints are connected in a hinged mode instead of a fixed mode, and thus the middle column becomes a controllable swing damping component; meanwhile, structural self-resetting function can be achieved under the effect of the upper structure load and elastic restoring force of the unbonded prestressed steel strands; the energy dissipation steel plate achieves an energy dissipation damping effect, stress is evenly distributed in the plates in the mode of preforming holes, multiple areas of theenergy dissipation steel plate enter into a plastic state advantageously, and the energy dissipation effect is improved; and protruded hemispherical embedded joints at the top and the bottom of the middle column can effectively achieve the effect of transmitting shearing force, column end sliding can be limited, and the unbonded prestressed steel strands can also be prevented from being subjectedto shear failure.

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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