A seismic damping device for a single-box double-cell bridge

Abstract

This utility model belongs to the field of bridge seismic technology, specifically providing a seismic damping device for a single-box double-cell bridge. The device includes a damper, one end of which is universally hinged to a first mounting base, and the other end is universally hinged to a central diaphragm. The first mounting base also has an energy-dissipating rod for connecting to a stop block through the side wall of the beam. The energy-dissipating rod can function as a shear-type damping unit and can also form a mechanical series connection with the damper, achieving synchronous energy transfer and ensuring coordinated control of vibrations at different positions of the box girder. Furthermore, the modular design distributes the damping units throughout the web and chambers, maximizing the use of internal space. This overcomes the installation limitations of traditional dampers in the narrow space of a single-box double-cell bridge, facilitating flexible design and installation, avoiding the impact of external clearance height, and providing excellent seismic energy dissipation.

Description

Technical Field

[0001] This utility model relates to the field of bridge seismic resistance technology, and in particular to a seismic damping device for a single-box double-cell bridge. Background Technology

[0002] Single-box double-cell box girder bridges are widely used in urban elevated and long-span bridge projects due to their high stiffness and light weight. However, the internal structure is divided into independent chambers by partitions, which poses significant challenges to traditional dampers in terms of installation space, coordinated energy dissipation, and environmental adaptability.

[0003] Existing dampers are often too large to be embedded in the narrow cavities of single-box double-cell bridges. Some attempts have been made to embed the dampers inside the web of the box girder, but due to the spatial separation characteristics of the single-box double-cell structure, there are still problems such as the damper installation position not matching the bridge vibration mode nodes and the asynchronous energy dissipation of multiple cavities. If external viscous dampers or metal yield dampers are used, they usually occupy the clearance under the bridge and affect the traffic clearance. Utility Model Content

[0004] The purpose of this invention is to solve the problem of the lack of damping devices that can be installed inside the chambers of single-box double-chamber bridges in the prior art, and to provide a seismic damping device for single-box double-chamber bridges.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] In a first aspect, a seismic damping device for a single-box double-cell bridge is provided, comprising a damper, one end of which is universally hinged to a first mounting base and the other end of which is universally hinged to a central diaphragm. The first mounting base is further provided with an energy dissipation rod for passing through a connecting block on the side wall of the beam.

[0007] The two ends of the seismic damper device are used to connect the central diaphragm of the beam and the stop block at the pier top, respectively. The displacement between the pier and the beam can cause the damper and the energy dissipation rod to deform and dissipate energy. The seismic damper devices can be arranged in pairs, that is, one seismic damper device of this application is installed in each of the two chambers of a single-box double-cell bridge. In some scenarios, this device can also be installed alone in one chamber of a single-box double-cell bridge, or it can be combined with other seismic devices for use in single-box double-cell bridges. The damper can be, for example, a metal yield bar, a viscous damper, or an eddy current damper.

[0008] In the initial installation state, the damper can be arranged at an angle to the longitudinal and / or transverse directions of the bridge, so that the damper can deform and dissipate energy in any direction under seismic action.

[0009] This invention discloses a seismic damper device for a single-box double-cell bridge. The energy dissipation rod can function as a shear damping unit and also form a mechanical series with the damper. This achieves synchronous energy transfer, ensuring coordinated control of vibrations at different positions of the box girder, thus addressing the issue of vibration phase difference in double-cell structures. Furthermore, the split design distributes the damping units throughout the web and chambers, maximizing internal space utilization and overcoming the installation limitations of traditional dampers in the narrow space of a single-box double-cell bridge. This facilitates flexible design and installation, avoids the impact of external placement on clearance height, and allows for real-time adjustment of the damping force axis to precisely match the direction of the bridge's bending-torsional coupling deformation. Both ends of the damper are universally hinged, enabling real-time adjustment of the damping force axis to precisely match the direction of the bridge's bending-torsional coupling deformation. This solves the problem of performance attenuation caused by deformation deviations in traditional devices, ensuring efficient dissipation of seismic energy.

[0010] Preferably, the damper has at least two components.

[0011] The quantity is determined based on the actual installation location and energy consumption requirements.

[0012] Preferably, the connections between the dampers and the central partition are arranged collinearly or in a circular pattern.

[0013] Collinearity can be along the height direction, along the longitudinal direction of the bridge, etc.

[0014] Preferably, the damper is fitted with a protective shell, and the outer wall of the protective shell has a flow guide groove.

[0015] The box girder has high humidity and poor ventilation. The above-mentioned configuration is adopted to reduce the corrosion of the damper's metal components, which helps to extend its service life, reduce maintenance costs, and improve the reliability of the device.

[0016] Preferably, the protective shell is a vacuum environment or filled with inert gas.

[0017] Preferably, the web is provided with a reinforcing structure, and the energy-dissipating rod passes through the reinforcing structure.

[0018] For example, reinforcement can be increased or stiffening structures can be added at the penetration points. This device only penetrates the web plate with a small perforation size, which has little impact on the stress performance of the web plate or beam, and facilitates the smooth installation of the energy dissipation limiting device. If necessary, further reinforcement structures can be added to ensure the performance of the beam.

[0019] Preferably, the reinforcing structure includes two perforated steel plates, which are respectively embedded in the inner and outer surfaces of the web, and the perforated steel plates have a flange on the side away from the web.

[0020] Preferably, the two sides of the partition plate are provided with the seismic damping device for the single-box double-cell bridge, and the two seismic damping devices for the single-box double-cell bridge are arranged symmetrically about the partition plate.

[0021] That is, the number of dampers on both sides, the connection position and other parameters are all corresponding to each other.

[0022] Preferably, the energy-dissipating rod is a prestressed solid column.

[0023] Preferably, a buffer layer is provided between the energy-dissipating rod and the wall of the through hole in the web.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0025] 1. This utility model discloses a seismic damper device for a single-box double-cell bridge. The energy dissipation rod can serve as a shear damping unit and also form a mechanical series with the damper. This achieves synchronous energy transfer, ensuring coordinated control of vibration at different positions of the box girder. Furthermore, the split design distributes the damping units throughout the web and chambers, maximizing the use of internal space. This overcomes the installation limitations of traditional dampers in the narrow space of a single-box double-cell bridge, facilitating flexible design and installation. It also avoids the impact of external placement on clearance height. The hinged support allows for real-time adjustment of the damping force axis, precisely matching the direction of the bridge's bending-torsional coupling deformation. Both ends of the damper are universally hinged, allowing for real-time adjustment of the damping force axis to precisely match the direction of the bridge's bending-torsional coupling deformation. This solves the problem of performance attenuation caused by deformation deviation in traditional devices, ensuring efficient dissipation of seismic energy. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a seismic damper device for a single-box double-cell bridge according to Embodiment 1. Figure 1 ;

[0027] Figure 2 This is a three-dimensional schematic diagram of a seismic damper device for a single-box double-cell bridge according to Embodiment 1. Figure 2 ;

[0028] Figure 3 This is a three-dimensional installation schematic diagram of a seismic damper device for a single-box double-cell bridge according to Embodiment 1;

[0029] Figure 4 This is a three-dimensional installation schematic diagram of a seismic damper device for a single-box double-cell bridge according to Embodiment 1 (the beam is not shown);

[0030] Figure 5 This is a front installation schematic diagram of a seismic damper device for a single-box double-cell bridge according to Embodiment 1.

[0031] icon:

[0032] 01-Intermediate partition, 02-Body plate, 03-Block, 1-Damper, 21-First mounting base, 22-Second mounting base, 23-Third mounting base, 3-Energy dissipation rod, 4-Perforated steel plate. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0034] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0035] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0036] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0037] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0038] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0039] Example 1

[0040] like Figures 1-5 As shown, a seismic damper device for a single-box double-cell bridge includes a damper 1. One end of the damper 1 is universally hinged to a first mounting base 21, and the other end is universally hinged to a middle diaphragm 01. The first mounting base 21 is also provided with an energy dissipation rod 3 for connecting a stop block 03 through the side wall of the web 02.

[0041] Specifically, the first mounting base 21 can be a flat plate component, with a damper 1 and an energy dissipation rod 3 on either side. Both ends of the damper 1 are ball seats. One ball seat of the damper 1 is connected to the first mounting base 21 via a connecting plate, and the other ball seat is mounted on the second mounting base 22. The second mounting plate 22 can also be a flat plate component, which is bolted to the middle partition plate 01. The energy dissipation rod 3 and the first mounting base 21 can be connected by common methods such as welding or threaded connection. The energy dissipation rod 3 can be a prestressed solid column. The other end of the energy dissipation rod 3 is connected to the third mounting base 23 (which can also be a flat plate component), and the stop block 03 is connected through the third mounting base 23.

[0042] The damper 1 can be a metal yield bar, a viscous damper, an eddy current damper, etc. For example, this application uses two viscous dampers arranged in a V-shape in the same plane. The damper 1 is fitted with a protective shell, the outer wall of which has a flow guide groove. The protective shell can be evacuated or filled with inert gas.

[0043] During installation, such as Figure 3-5 As shown, the seismic damping device for the single-box double-cell bridge of this application can be symmetrically arranged on both sides of the diaphragm 01. The second mounting bases 22 on both sides are connected to the corresponding positions of the diaphragm 01. The energy dissipation rod 3 extends out of the cavity through the through hole on the web plate 02 and is connected to the stop block 03. The position on the web plate 02 where the energy dissipation rod 3 passes through is provided with a reinforcement structure. In this embodiment, two perforated steel plates 4 are used. The two perforated steel plates are respectively embedded in the inner and outer surfaces of the web plate 02. The side of the perforated steel plate 4 away from the web plate 02 has a flange.

[0044] The first mounting base 21, the second mounting base 22, and the third mounting base 23 can be selected according to their actual installation positions, such as an L-shaped structure.

[0045] In some optional embodiments, the number of dampers 1 in the seismic damper device for a single single-box double-cell bridge can also be three. The second mounting bases 22 of the three dampers 1 are collinear along the longitudinal direction of the bridge, or collinear along the beam height direction, or arranged in a circular pattern. The number of dampers 1 can also be four. The connection line of the second mounting plates 22 of the four dampers 1 can be square, rhomboid, etc., determined according to the actual internal space and energy consumption requirements.

[0046] In some alternative embodiments, the number of dampers 1 in the seismic damping device for a single single-box double-cell bridge can also be one, and the arrangement is also inclined to the longitudinal bridge. The dampers 1 on both sides of the diaphragm 01 can be arranged in a centrally symmetrical manner.

[0047] This invention discloses a seismic damper device for a single-box double-cell bridge. The energy dissipation rod can function as a shear damping unit and also form a mechanical series with the damper. This achieves synchronous energy transfer, ensuring coordinated control of vibrations at different positions of the box girder, thus addressing the issue of vibration phase difference in double-cell structures. Furthermore, the split design distributes the damping units throughout the web and chambers, maximizing internal space utilization and overcoming the installation limitations of traditional dampers in the narrow space of a single-box double-cell bridge. This facilitates flexible design and installation, avoids the impact of external placement on clearance height, and allows for real-time adjustment of the damping force axis to precisely match the direction of the bridge's bending-torsional coupling deformation. Both ends of the damper are universally hinged, enabling real-time adjustment of the damping force axis to precisely match the direction of the bridge's bending-torsional coupling deformation. This solves the problem of performance attenuation caused by deformation deviations in traditional devices, ensuring efficient dissipation of seismic energy.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A seismic damping device for a single-box double-cell bridge, characterized in that, Includes a damper (1), one end of which is universally hinged to a first mounting base (21) and the other end is universally hinged to a central diaphragm (01). The first mounting base (21) is also provided with an energy dissipation rod (3) for passing through the side wall of the web (02) and connecting to a stop block (03). The energy dissipation rod (3) and the damper (1) are connected in series. The damper (1) and the first mounting base (21) are located in the box chamber. The two ends of the seismic damper device are respectively used to connect the central diaphragm (01) of the beam and the stop block (03) on the top of the pier.

2. The seismic damping device for a single-box double-cell bridge according to claim 1, characterized in that, The damper (1) has at least two.

3. The seismic damping device for a single-box double-cell bridge according to claim 2, characterized in that, The dampers (1) and the middle partition (01) are arranged collinearly or in a circle at their connection points.

4. The seismic damping device for a single-box double-cell bridge according to claim 1, characterized in that, The damper (1) is fitted with a protective shell on its outer side, and the outer wall of the protective shell has a flow guide groove.

5. The seismic damping device for a single-box double-cell bridge according to claim 4, characterized in that, The protective shell is a vacuum environment or filled with inert gas.

6. A seismic damping device for a single-box double-cell bridge according to any one of claims 1-5, characterized in that, The web (02) is provided with a reinforcing structure, and the energy dissipation rod (3) passes through the reinforcing structure.

7. The seismic damping device for a single-box double-cell bridge according to claim 6, characterized in that, The reinforcement structure includes two perforated steel plates (4), which are respectively embedded in the inner and outer surfaces of the web (02). The perforated steel plates (4) have a flange on the side away from the web (02).

8. The seismic damping device for a single-box double-cell bridge according to claim 6, characterized in that, The two seismic damping devices for the single-box double-cell bridge are provided on both sides of the diaphragm (01), and the two seismic damping devices for the single-box double-cell bridge are arranged symmetrically about the diaphragm (01).

9. A seismic damping device for a single-box double-cell bridge according to claim 6, characterized in that, The energy-dissipating rod (3) is a prestressed solid column.

10. A seismic damping device for a single-box double-cell bridge according to claim 6, characterized in that, A buffer layer is provided between the energy-consuming rod (3) and the through hole wall of the web plate (02).

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