A new type of prefabricated station structure with separated central column based on friction pendulum

Abstract

This invention discloses a novel prefabricated station structure based on a friction pendulum with separate central columns, comprising a top slab, a bottom slab, and side walls. A middle slab is positioned between the top and bottom slabs, and multiple upper central columns are positioned between the top and middle slabs. Multiple lower central columns are positioned between the middle and bottom slabs, with corresponding upper and lower central columns arranged symmetrically in a mirror image. Both upper and lower central columns are separate central columns, each consisting of a first separate column and a second separate column. The upper ends of the first and second separate columns are connected and fixed via an upper arc-shaped connecting part, and their lower ends are connected via a lower arc-shaped connecting part. Swing supports are installed at the arc-shaped grooves of the bottom and top slabs. This station structure balances structural stiffness, structural stability, and seismic isolation performance.

Description

Technical Field

[0001] The invention relates to the field of engineering technology, and in particular to a novel prefabricated and assembled station structure with a separated center column based on a friction pendulum. Background Art

[0002] The Great Hanshin Earthquake in 1995 caused serious damage to the Daikai Station, among which the middle column was the most severely damaged, which directly led to the collapse of the station roof and the ground surface. Therefore, the middle column is the weakest part of the subway station structure in terms of earthquake resistance. Therefore, in order to improve the overall earthquake resistance of the subway station, it is necessary to give priority to improving the earthquake resistance of the middle column. With the country's vigorous promotion and popularization of prefabricated and assembled structures, assembled subway stations have also developed rapidly, which has also created conditions for the proposal and adoption of new structural forms.

[0003] Although there are a lot of methods and measures to improve the seismic resistance of subway station columns, there are still few specific applications in actual projects and their applicability is not strong. The existing columns are long column structures, and their stability and overall stiffness cannot cope with earthquake disasters. Therefore, combined with the prefabricated subway station structure that is being vigorously promoted, it is necessary to design a prefabricated station structure with stable structure and good seismic isolation effect. Summary of the invention

[0004] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a new prefabricated and assembled station structure with a separated central column based on a friction pendulum, which takes into account the structural stiffness, structural stability and seismic isolation performance.

[0005] The present invention is completed by adopting the following technical scheme: a new type of prefabricated and assembled station structure with a separated center column based on a friction pendulum, including a prefabricated top plate, a bottom plate and side walls, a middle plate is arranged between the top plate and the bottom plate, a plurality of upper center columns are arranged between the top plate and the middle plate, a plurality of lower center columns are arranged between the middle plate and the bottom plate, the corresponding upper center columns and lower center columns are symmetrically distributed in mirror images, the upper center columns and the lower center columns are both separated center columns, the separated center column consists of a first separation column and a second separation column, the upper ends of the first separation column and the second separation column are connected and fixed by an upper arc-shaped connecting part, the lower ends of the first separation column and the second separation column are connected and fixed by a lower arc-shaped connecting part, and the cross-section of the separated center column is triangular.

[0006] Furthermore, the bottom plate has a bottom plate arc groove corresponding to the lower arc connection portion of the lower middle column, the middle plate is provided with a first middle plate arc groove corresponding to the upper arc connection portion of the lower middle column, and a swing support is arranged in the bottom plate arc groove.

[0007] Furthermore, the top plate has a top plate arc groove corresponding to the lower arc connection portion of the upper middle column, the middle plate is provided with a second middle plate arc groove corresponding to the upper arc connection portion of the upper middle column, and the top plate arc groove is configured with a swing support.

[0008] Furthermore, a cavity is formed between the first separation column and the second separation column, and the cavity can be used for laying station pipelines.

[0009] In the present invention, the existing middle column is divided into two parts, and the upper and lower ends are connected by an arc-shaped connecting part, so that the cross-section of the separated middle column is triangular. The triangle is the most stable geometric unit, which can effectively improve the stability of the middle column. The increase in its cross-sectional area can improve its bending stiffness. At the same time, the arc-shaped connecting part of the separated middle column forms an arc surface with the top plate, the bottom plate and the middle plate. When subjected to external earthquake disasters, the sliding friction between the arc-shaped connecting part of the separated middle column and the arc-shaped groove consumes earthquake energy based on the principle of friction pendulum, which can effectively improve the overall earthquake resistance of the subway station. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention has the following accompanying drawings:

[0011] Figure 1 It is a structural schematic diagram of a novel prefabricated and assembled station structure with a separated center column based on a friction pendulum in the first embodiment;

[0012] Figure 2 It is a schematic diagram of the cross-sectional structure of a separated center column;

[0013] Figure 3 It is a structural schematic diagram of a novel prefabricated and assembled station structure with a separated center column based on a friction pendulum in the second embodiment;

[0014] Figure 4 for Figure 3 Structural schematic diagram of the split center column support;

[0015] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the middle reset support component;

[0016] Figure 6 for Figure 4 A schematic diagram of a local cross-sectional structure of an anti-pullout component in FIG.

[0017] Figure 7 for Figure 4 Schematic diagram of the cross-sectional structure of the pull-out resistant component. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Reference Figure 1-Figure 2 The first embodiment of the present invention provides a new type of prefabricated and assembled station structure with a separated center column based on a friction pendulum, including a prefabricated top plate 1, a bottom plate 2 and a side wall 3, a middle plate 4 is arranged between the top plate and the bottom plate, a plurality of upper center columns 5 are arranged between the top plate 1 and the middle plate 4, a plurality of lower center columns 6 are arranged between the middle plate and the bottom plate, and the corresponding upper center columns 5 and lower center columns 6 are symmetrically distributed in a mirror image.

[0020] The upper middle column and the lower middle column are both separated middle columns 7, and the separated middle column is composed of a first separation column 71 and a second separation column 72. The upper ends of the first separation column 71 and the second separation column are connected and fixed by an upper arc-shaped connecting portion 73, and the lower ends of the first separation column and the second separation column are connected and fixed by a lower arc-shaped connecting portion 74. A cavity 75 is formed between the first separation column 71 and the second separation column 72, and the cavity 75 can be used for laying station pipelines. The bottom plate 2 has a bottom plate arc groove 21 corresponding to the lower arc-shaped connecting portion of the lower middle column, and the bottom plate arc groove is provided with a swing support 22, and the middle plate 4 is provided with a first middle plate arc groove 41 corresponding to the upper arc-shaped connecting portion of the lower middle column. The upper arc-shaped connecting portion at the top of the lower middle column is placed in the first middle plate arc groove 41, and the lower arc-shaped connecting portion at the bottom of the lower middle column is placed on the swing support 22 of the bottom plate arc groove. The top plate 1 has a top plate arc groove 11 corresponding to the lower arc connection part of the upper middle column, the top plate arc groove is provided with a swing support 12, the middle plate is provided with a second middle plate arc groove 42 corresponding to the upper arc connection part of the upper middle column, the upper arc connection part of the upper middle column is placed on the second middle plate arc groove 42, the lower arc connection part of the upper middle column is placed in the swing support 12 of the top plate arc groove, and the swing support has a curved surface that swings with the lower arc connection part.

[0021] Combined with the existing assembled subway station structure, the existing center column is divided into two, and the upper and lower ends are connected by an arc-shaped connection part, so that the cross-section formed by the separated center column and the bottom plate or the top plate is triangular. The triangle is the most stable geometric unit, which can effectively improve the stability of the center column. The structure of the center column is simple, convenient for factory casting, and quick to assemble. At the same time, the cross-sectional area of ​​the lower end of the center column increases after separation, which can improve its bending stiffness. The interior of the triangular cross-section is hollow for pipeline laying, which effectively utilizes the space of the subway station. The arc-shaped connection part of the separated center column forms an arc surface with the swing bearings of the top plate, bottom plate and middle plate. When subjected to external earthquake disasters, the sliding friction between the arc-shaped connection part of the separated center column and the swing bearing in the arc groove consumes earthquake energy based on the principle of friction pendulum, which can effectively improve the overall seismic performance of the subway station.

[0022] Reference Figure 3-Figure 7The second embodiment of the present invention provides a new type of prefabricated station structure with a separated center column based on a friction pendulum, which is basically the same as the first embodiment, except that: the separated center column has a support 10 at one end close to the lower arc-shaped connection portion, and the support is distributed around the separated center column. A plurality of anti-pullout components 8 and reset support components 9 are connected between the support and the bottom plate or the top plate, and adjacent anti-pullout components 8 are symmetrically distributed, and the reset support components are evenly spaced. That is, the end of the upper center column close to the lower arc-shaped connection portion has a support, and the anti-pullout components 8 and reset support components 9 are distributed between the support of the upper center column and the top plate, and the end of the lower center column close to the lower arc-shaped connection portion also has a support, and the anti-pullout components 8 and reset support components 9 are also distributed between the support of the lower center column and the bottom plate, and the adjacent anti-pullout components are symmetrically distributed, that is, the plurality of anti-pullout components 8 are symmetrically distributed in pairs.

[0023] Mounting seats 93 are provided at the upper and lower ends of the reset support component, and the reset support component is fixedly installed between the bottom plate and the support of the lower middle column or between the top plate and the support of the upper middle column through the mounting seats 93. The reset support component 9 is composed of a protective rubber layer 91 and a memory alloy layer 92, and the protective rubber layer 91 is wrapped around the outside of the memory alloy layer 92. The memory alloy layer is preferably a superelastic memory alloy. The memory alloy layer is a honeycomb-shaped bionic cancellous bone structure, that is, the bionic cancellous bone structure has porous gaps inside, and the gaps of the memory alloy layer are filled with single-substance Sn94, where Sn is metallic tin. Based on the shape memory effect and superelastic properties of the memory alloy material, it absorbs and consumes energy during external vibration, and is combined with the "friction pendulum principle" of the separated middle column to further reduce the vibration amplitude and frequency of the station structure, exert a good shock absorption and vibration isolation effect, and double protection to improve the seismic performance of the structure. At the same time, when the external vibration ends, the memory alloy layer returns to its original state based on the shape memory effect, which can assist in resetting the separated center column, prevent the separated center column from being stuck or unable to be reset, and realize real-time regulation and repair of the structure. At the same time, the porous bionic cancellous bone structure inside the memory alloy layer helps to exert the shape memory effect, improve the reset and deformation effect of the reset support component, and infuse single tin into the gap to enhance the strength, wear resistance and corrosion resistance of the memory alloy, enhance the connection strength of the bottom plate or top plate of the separated center column, and do not affect the deformation and reset of the memory alloy.

[0024] The anti-pullout component 8 includes a sleeve 81, an upper connecting shaft 82 and a lower connecting shaft 83. The inner ends of the upper connecting shaft and the lower connecting shaft pass through the sleeve and cooperate with the elastic component inside the sleeve. The outer ends of the upper connecting shaft and the lower connecting shaft have a ball crown 84. The support and the bottom plate or the top plate both have grooves matching the ball crown. The ball crown of the upper connecting shaft is installed in the groove 101 of the support through a universal seat 103, and the ball crown of the lower connecting shaft is installed in the groove 102 of the bottom plate or the top plate through the universal seat 103. The universal rotation cooperation of the ball crown with the support groove 101 and the groove 102 of the bottom plate or the top plate meets the movement requirements of the friction swing of the memory alloy layer and the separated center column. The inner end of the upper connecting shaft has an upper limit seat 821, the inner end of the lower connecting part has a lower limit seat 831, the first elastic component 85 is sleeved on the connecting end of the upper connecting shaft and the upper limit seat, the second elastic component 86 is sleeved on the connecting end of the lower connecting shaft and the lower limit seat, and a third elastic component 87 is arranged between the upper limit seat and the lower limit seat. The first elastic component, the second elastic component and the third elastic component are preferably butterfly springs. The pull-out-resistant component has good pull-out resistance, which can avoid tensile damage to the reset support component and the separated center column. With the cooperation of the elastic component, the seismic response of the structure is reduced and the vibration isolation effect is improved. The combination of the pull-out-resistant component, the reset support component and the separated center column can improve the seismic resistance of the assembled station structure and prevent the station structure from overturning under the action of an earthquake.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A novel prefabricated station structure with a separated center column based on a friction pendulum, comprising a top plate, a bottom plate and side walls, wherein a middle plate is arranged between the top plate and the bottom plate, and is characterized in that: A plurality of upper middle columns are arranged between the top plate and the middle plate, and a plurality of lower middle columns are arranged between the middle plate and the bottom plate, and the corresponding upper middle columns and lower middle columns are symmetrically distributed in mirror images, and the upper middle columns and lower middle columns are both separated middle columns, and the separated middle columns are composed of a first separation column and a second separation column, and the upper ends of the first separation column and the second separation column are connected and fixed by an upper arc-shaped connecting portion, and the lower ends of the first separation column and the second separation column are composed of a lower arc-shaped connecting portion, so that the cross section formed by the separated middle column and the bottom plate or the top plate is triangular; The bottom plate has a bottom plate arc groove corresponding to the lower arc connection portion of the lower middle column, the middle plate is provided with a first middle plate arc groove corresponding to the upper arc connection portion of the lower middle column, and the bottom plate arc groove is provided with a swing support; The top plate is provided with a top plate arc groove corresponding to the lower arc connection portion of the upper middle column, the middle plate is provided with a second middle plate arc groove corresponding to the upper arc connection portion of the upper middle column, and the top plate arc groove is provided with a swing support; The separate center column has a support at one end close to the lower arc-shaped connecting portion, and the support is distributed around the separate center column. A plurality of anti-pullout components and reset support components are connected between the support and the bottom plate or the top plate, and the anti-pullout components and reset support components are distributed at intervals between the support and the bottom plate or the top plate.

2. According to claim 1, a novel prefabricated station structure with a separated center column based on a friction pendulum is characterized by: A cavity is formed between the first separation column and the second separation column, and the cavity can be used for laying station pipelines.

3. A novel prefabricated station structure with a separated center column based on a friction pendulum according to claim 1 or 2, characterized in that: The reset support component is composed of a protective rubber layer and a memory alloy layer, the protective rubber layer is wrapped around the outside of the memory alloy layer, the memory alloy layer is a honeycomb-shaped bionic cancellous bone structure, and single-substance Sn is poured into the gaps of the memory alloy layer. Mounting seats are arranged at the upper and lower ends of the reset support component, and the reset support component is respectively installed between the bottom plate and the support or between the top plate and the support through the mounting seats.

4. A novel prefabricated station structure with a separated center column based on a friction pendulum according to claim 1 or 2, characterized in that: The anti-pullout component includes a sleeve, an upper connecting shaft and a lower connecting shaft, the inner ends of the upper connecting shaft and the lower connecting shaft pass through the sleeve and cooperate with the elastic component inside the sleeve, the outer ends of the upper connecting shaft and the lower connecting shaft have spherical crowns, the support and the bottom plate or the top plate have grooves adapted to the spherical crowns, the spherical crown of the upper connecting shaft is installed in the groove of the support through a universal seat, and the spherical crown of the lower connecting shaft is installed in the groove of the bottom plate or the top plate through a universal seat, the inner end of the upper connecting shaft has an upper limit seat, and the inner end of the lower connecting shaft has a lower limit seat, the first elastic component is sleeved at the connection between the upper connecting shaft and the upper limit seat, the second elastic component is sleeved at the connection between the lower connecting shaft and the lower limit seat, and a third elastic component is arranged between the upper limit seat and the lower limit seat.

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