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

An underground station, self-reset technology, applied in the direction of columns, shockproof, pier columns, etc., can solve problems such as crushing, reduction of vertical bearing capacity, concrete cracking, etc., to achieve good energy consumption and increase the effect of plastic area.

Active Publication Date: 2019-11-19
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Such as Figure 1 to Figure 5As shown, a sway self-resetting shock absorbing system for the central column of an underground station includes a central column 1 and a top plate 2 and a bottom plate 3 directly connected to the central column 1. The top plate 2, the central column 1 and the bottom plate 3 pass through The knotted prestressed steel strands 4 are connected into a whole, the unbonded prestressed steel strands 4 pass through the center of the center column 1 vertically, and the upper ends of the unbonded prestressed steel strands 4 are anchored to the top plate 2 through anchors 5 The upper and lower ends are anchored to the bottom of the bottom plate 3 through the anchorage 5; the upper end of the central column 1 has a hemispherical upper raised joint 101 and a steel backing plate 7 with hemispherical protrusions, and the corresponding position of the lower end of the top plate 2 is reserved with a hemispherical The lower end of the center column 1 has a he...

Embodiment 2

[0050] The basic structure and method of this embodiment are the same as those of Embodiment 1, and the similarities will not be described in detail. The difference is:

[0051] The top plate 2 and the bottom plate 3 are constructed by cast-in-place method, and the specific steps are as follows:

[0052] a The center column 1 is constructed by factory prefabrication and on-site assembly, the center of which uses corrugated pipes to reserve unbonded prestressed steel strand holes, and the hook end of the center column pre-embedded steel plate 8 is pre-embedded at the designed position. The hemispherical protruding steel backing plate 7 is correspondingly pre-embedded at the top and bottom of the center column 1. After the concrete is poured and prefabricated, the steel backing plate 7 is adhered to the top and bottom of the center column 1 to form a whole with the center column 1;

[0053] b Base plate 3 is cast-in-place construction, the hook end of base plate pre-embedded ste...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/98E04H9/02E04C3/34E04C5/08E04C5/12
CPCE04B1/98E04C3/34E04C5/08E04C5/12E04H9/025
Inventor 董正方翟鹏飞康帅尹俊红李家勇王丽萍
Owner HENAN UNIVERSITY
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