Self-resetting device for bridge damping

Abstract

The invention belongs to the technical field of bridge shock resistance, and particularly provides a self-resetting device for bridge shock absorption, a bridge and a mounting method, the device adopts a connecting piece to connect a first backstop and a second mounting seat to form a plane frame structure, the stress performance is better, the impact force is effectively shared, the anti-impact capability and the limiting capability of the device are improved, and the service life of the device is prolonged. The damper consumes energy in the moving process of the second backstop, the reset spring can provide reset force and can also achieve the buffering effect, the contact time of the main beam and the bridge pier is prolonged, the impact force of the main beam on the bridge pier is reduced, the requirement for the vertical height of the first installation base, the second installation base and the third backstop is small, and other components are each of an axial extending structure. According to the device, the functions of energy dissipation, limiting, resetting and buffering are well integrated, the anti-seismic and damping capacity of a bridge is effectively improved, and the device is particularly suitable for application scenes where the space between simply supported beams and other pier beams is narrow.

Description

Technical Field

[0001] This invention relates to the field of bridge seismic resistance technology, and in particular to a self-resetting device for bridge vibration reduction, a bridge, and an installation method. Background Technology

[0002] When an earthquake strikes, damage to bridge structures not only causes casualties and direct economic losses, but also often hinders the evacuation of disaster victims, posing significant challenges to subsequent rescue and relief efforts and later repair and maintenance. Therefore, reducing the probability of bridge structural damage during earthquakes and ensuring the normal passage and use of bridges after an earthquake should be a key focus of bridge seismic resistance research.

[0003] Currently, the most commonly used seismic isolation measures include concrete blocks, steel anti-fall beams, and connecting beams and tie rods. Seismic isolation devices mainly include friction pendulum bearings and various dampers. Generally, the height and width of the space between simply supported beam piers are often very small, making it difficult to place seismic isolation devices. In high-intensity earthquake zones, bridges require separate seismic isolation designs, making it difficult to combine them with seismic isolation structures. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that the space between the piers and beams of simply supported beams in the prior art is very small, making it difficult to adapt to the combined installation of individual limiting structures and vibration isolation devices, and to provide a self-resetting device, bridge, and installation method for bridge vibration reduction.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, a self-resetting device for bridge vibration damping is provided, comprising: The first mounting base includes two spaced-apart first stops; A shaft body that can pass through the first stop, and a second stop provided on the shaft body. The movement of the second stop can drive the shaft body to move longitudinally, and the cooperation between the second stop and the first stop can limit the longitudinal displacement of the shaft body. Two third stops, the distance between the two third stops being greater than the thickness of the second stop, and the second stop being able to be located between the two third stops; The second mounting base is respectively disposed on both sides of the first mounting base. A connecting member is provided between the first stop and the second mounting base. The connecting members can form a planar frame structure. A damper, the two ends of which are rotatably connected to the second stop and the second mounting base respectively, and the third stop moving to abut against the second stop can drive the second stop to move and thus deform the damper; A reset spring is used to reset the second stop.

[0006] The installation height of the connectors differs from that of the damper to avoid interfering with the damper's movement. The first mounting base and the third stop connect the pier top and beam bottom, respectively. The second mounting base can connect to either the pier top or beam bottom as needed. Displacement between the pier and beam allows the third stop on one side to approach the second stop until it moves, thereby causing longitudinal movement of the shaft and deformation of the damper to dissipate energy. The second stop abuts against the first stop, which limits its movement. The structural form and dimensions of each mounting base can be designed according to the actual installation space.

[0007] The spacing between the two third stops can be determined based on the deformation of the normal operation. Depending on the direction of the required movement and the direction of the limit, the shaft can be arranged along the transverse or longitudinal direction of the bridge.

[0008] In the initial installation state, the distance between the second stop and the two first stops should be such that the shaft has a corresponding distance of movement in both longitudinal directions.

[0009] The present invention discloses a self-resetting device for bridge vibration reduction. A connecting piece connects the first stop and the second mounting base to form a planar frame structure, integrating the first and second mounting bases into a single unit. This improves the load-bearing capacity. The impact of the second stop on the first stop caused by axial movement is transmitted to the second mounting base through the connecting piece, effectively distributing the impact force and enhancing the device's impact resistance and limiting capabilities. The damper dissipates energy during the movement of the second stop, and the reset spring provides both reset force and buffering effect, increasing the contact time between the main beam and the pier, thus reducing the impact force of the main beam on the pier. The first, second, and third mounting bases have low vertical height requirements, and all other components are axially extending structures, resulting in a flat structure. This application effectively integrates energy dissipation, limiting, reset, and buffering functions, effectively improving the bridge's seismic resistance and vibration reduction capabilities. It is particularly suitable for applications with limited space between piers and beams, such as simply supported beams.

[0010] Preferably, the shaft includes a first shaft and a plurality of second shafts arranged side by side, the second stop is connected at the connection between the first shaft and the second shaft, the cross-sectional dimension of the first shaft is larger than the cross-sectional dimension of the second shaft; in the initial installation state, the damper is arranged at an acute angle of ≥75° with the shaft.

[0011] Preferably, in the initial installation state, the two second mounting seats are located on both sides of the middle of the line connecting the two first stops, and the two dampers form a V-shaped structure with the opening of the V-shaped structure facing the first shaft.

[0012] Preferably, the return spring is sleeved on the second shaft, and the two ends of the return spring are respectively connected to the second stop and the corresponding first stop.

[0013] In the initial installation of this device, the first shaft with greater stiffness between the two first stops is arranged to be slightly longer, and the return spring is only set on one side of the second shaft. This facilitates the adjustment, flexible design, and uniform transmission of the return force, and avoids the damper being perpendicular to the shaft in the initial state, which could lead to jamming or impact damage. In addition, during the longitudinal reciprocating movement of the shaft, the side of the first shaft with greater stiffness also accounts for a slightly larger proportion, minimizing the deformation of the second shaft with less stiffness, avoiding device failure, and effectively reducing the weight of the device, making it easier to install. Moreover, part of the force can be transmitted to the pier through the second mounting base, and the other part of the force can be transmitted to the first stop through the connector, effectively dispersing and propagating the force, preventing the force transmitted by the damper from being too large and damaging the anchorage of the second mounting base.

[0014] Preferably, a fourth stop is provided at the other end of the first shaft and the other end of the second shaft, and the fourth stop cooperates with the first stop to restrict the longitudinal displacement of the shaft. The fourth stop is replaced and works in conjunction with the first stop to limit the movement, further reducing the direct impact on the second stop and helping to prevent damage and failure of the damper.

[0015] Preferably, the third stop is provided with a plurality of pulleys, the shafts of the pulleys are arranged along the height direction of the third stop, and the pulleys are distributed longitudinally at intervals along the third stop.

[0016] The goal is to ensure that when the device comes into contact with the main beam, it transmits forces in the direction of impact as much as possible, thereby reducing the transmission of shear forces.

[0017] Preferably, the damper is a viscous damper or an eddy current damper.

[0018] Preferably, the contact surface between the shaft and the first stop has a friction energy dissipation plate.

[0019] Preferably, an energy-consuming component can also be added between the second stop and the first stop.

[0020] Preferably, the second mounting base includes a base and a column, and the two third stops are connected by a connecting plate. The second mounting base has a simpler structure, is lighter in weight, and is easier to use for positioning control during installation, improving installation accuracy and reducing installation difficulty.

[0021] The column and connector can be fixed in the existing way. The connection between the column and the damper can be such that the ring structure at the end of the damper is fitted onto the column, and the upper and lower limits are set by the corresponding two connectors, without affecting the rotation.

[0022] Secondly, a bridge is provided in which a self-resetting device for bridge vibration reduction, as described above, is provided between two transverse support pads, and the shaft is arranged along the longitudinal direction of the bridge.

[0023] Thirdly, a method for installing a vibration damping device is provided, applied to a self-resetting device for bridge vibration damping as described above, the method comprising the following steps: S1. Install the first mounting bracket and the second mounting bracket; S2. Install connectors; S3. Install the shaft, second stop, and return spring; S4. Install the damper; S5. Install the third stop to complete the installation of the device.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The self-resetting device for bridge vibration reduction according to the present invention uses a connector to connect the first stop and the second mounting seat to form a planar frame structure. Connecting the first and second mounting seats into a whole improves the stress performance. The impact of the second stop on the first stop caused by the movement of the shaft can be transmitted to the second mounting seat through the connector, effectively distributing the impact force and improving the impact resistance and limiting ability of the device. The damper dissipates energy during the movement of the second stop, and the reset spring can provide reset force and also play a buffering role, increasing the contact time between the main beam and the pier, thus reducing the impact force of the main beam on the pier. The vertical height requirements of the first mounting seat, the second mounting seat and the third stop are small, and the remaining components are all axially extended structures, making the device form a flat structure. This application integrates energy dissipation, limiting, reset and buffering functions well, which not only effectively improves the seismic resistance and vibration reduction capability of bridges, but is also particularly suitable for application scenarios with narrow space between piers and beams, such as simply supported beams.

[0025] 2. The bridge using the present invention can effectively balance energy dissipation capacity, impact resistance and restraint capacity, with good overall seismic performance and structural safety.

[0026] 3. The installation method of the shock absorption device of the present invention helps to reduce the installation difficulty and improve the installation accuracy. Attached Figure Description

[0027] Figure 1 This is a three-dimensional schematic diagram of a self-resetting device for bridge vibration reduction according to Embodiment 1. Figure 1 (The third stop is not shown); Figure 2 This is a top view schematic diagram of a self-resetting device for bridge vibration reduction according to Embodiment 1. Figure 1 (The third stop is not shown); Figure 3 This is a three-dimensional schematic diagram of a self-resetting device for bridge vibration reduction according to Embodiment 1. Figure 2 (The third stop is not shown); Figure 4This is a top view schematic diagram of a self-resetting device for bridge vibration reduction according to Embodiment 1. Figure 2 (The third stop is not shown); Figure 5 This is a three-dimensional structural schematic diagram of the third stop in Embodiment 1; Figure 6 This is a schematic diagram of the usage status of a self-resetting device for bridge vibration reduction according to Embodiment 1. Figure 1 ; Figure 7 This is a schematic diagram of the usage status of a self-resetting device for bridge vibration reduction according to Embodiment 1. Figure 2 .

[0028] icon: 01-Support pad, 11-First stop, 12-Second stop, 13-Third stop, 14-Fourth stop, 131-Pulley, 21-First shaft, 22-Second shaft, 3-Connecting plate, 4-Second mounting base, 41-Base, 42-Column, 5-Connector, 6-Damper, 7-Reset spring. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope 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.

[0030] 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 the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention 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 particular 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 the present invention.

[0031] 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 that it 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.

[0032] 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.

[0033] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0034] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided 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.

[0035] Example 1 like Figures 1-7 As shown, a self-resetting device for bridge vibration damping includes: The first mounting base includes two spaced-apart first stops 11; A shaft body that can pass through the first stop 11, and a second stop 12 provided on the shaft body, the movement of the second stop 12 can drive the shaft body to move longitudinally. Two third stops 13, the distance between the two third stops 13 is greater than the thickness of the second stop 12, and the second stop 12 can be located between the two third stops 13; The second mounting base 4 is respectively disposed on both sides of the first mounting base. A connecting member 5 is provided between the first stop 11 and the second mounting base 4. A plurality of the connecting members 5 can form a planar frame structure. The damper 6 is rotatably connected at both ends to the second stop 12 and the second mounting base 4 respectively. The third stop 13 moves to abut against the second stop 12, which can drive the second stop 12 to move and thus deform the damper 6. The reset spring 7 is used to drive the second stop 12 to reset.

[0036] Specifically, in this embodiment, the first mounting base includes two independently arranged first stops 11. The first stops 11 can be connected to the embedded parts through the base plate. The arrangement spacing of the two first stops 11 is determined according to actual needs. The structural shape of the second stop 12 can also be selected according to actual conditions, and it can be integral or assembled. The second mounting base 4 includes a base 41 and a column 42. The second mounting base 4 is symmetrically arranged on both sides along the axis, and is set in the middle area of ​​the line connecting the two first stops 11 or slightly closer to the first stop 11 on the side of the first axis 21. The planar frame structure formed by the connecting rod 5 is roughly rhomboid, and the cross-sectional shape of the connecting member 5 is not limited. The shaft includes a first shaft 21 and two second shafts 22 arranged side by side. A second stop 12 is connected to the connection between the first shaft 21 and the second shaft 22. A fourth stop 14 is provided at the other end of both the first shaft 21 and the second shaft 22. The fourth stop 14 cooperates with the first stop 11 to restrict the longitudinal displacement of the shaft. The cross-sectional dimension of the first shaft 21 is larger than that of the second shaft 22, resulting in a higher stiffness for the first shaft 21 than for the second shaft 22. The damper 6 can be, for example, a viscous damper. The device includes an eddy current damper, a return spring 7, and a return spring 7. The two ends of the return spring 7 are connected to a second stop 12 and a corresponding first stop 11, respectively. In the initial installation state, the damper 6 is arranged at an acute angle of ≥75° with the shaft, forming a V-shaped structure with the opening of the V-shape facing the first shaft 21. The damper 6 is configured to deform and dissipate energy regardless of which side the second stop 12 moves towards. There is space for movement between the second stop 12 and the two first stops 11. Figures 3-4 As shown.

[0037] like Figure 5 As shown, the third stop 13 is connected to a connecting plate 3, and a plurality of pulleys 131 are provided on the third stop 13. The rotation axis of the pulleys 131 is set along the height direction of the third stop 13, and the pulleys 131 are distributed longitudinally along the third stop 13.

[0038] The first stop 11, the third stop 13, and the fourth stop 14 are horizontally extending structures. The second stop 12 needs to extend into the space between the third stop 13, forming a vertically extending structure. The connecting rod 5, the damper 6, and the shaft are all axial components. The overall height of the device is low, making it suitable for narrow spaces between piers and beams.

[0039] The first shaft 21 can have a circular cross-section, or it can have an elliptical or rectangular cross-section to further reduce the height of the device.

[0040] During normal operation, the second stop 12 can move longitudinally and laterally along the limiting groove formed by the two third stops 13. When the displacement of the pier increases, the third stop 13 abuts against the second stop 12 and further drives it to move longitudinally toward the second shaft 22, causing the damper 6 to deform and dissipate energy. The return spring 7 is stretched to provide a restoring force and buffering. Figures 1-2 As shown; the second stop 12 moves to the other side on the same principle.

[0041] In some alternative embodiments, the number of second shafts 22 can vary, such as using three arranged in a triangular pattern.

[0042] In some alternative embodiments, a return spring may also be provided on one side of the first shaft 21.

[0043] In some alternative embodiments, the first shaft 22 may be replaced with the same structural dimensions as the first shaft 21.

[0044] In some alternative embodiments, the longitudinal displacement of the shaft can also be limited by the second stop 12 and the first stop 11.

[0045] In some alternative embodiments, the inner surface of the third stop 13 may also be configured as a low-friction contact surface.

[0046] In some optional embodiments, the contact surface between the shaft and the first stop 11 has a friction energy dissipation plate, and an energy dissipation component may also be added between the second stop 12 and the first stop 11.

[0047] In some alternative embodiments, the base plates of the two first stops 11 can be connected to each other as a whole.

[0048] In some alternative embodiments, the second stop 12 may be sleeved on the first shaft 21, and the second shaft 22 may be threaded to the end face of the first shaft 21.

[0049] In some alternative embodiments, the return spring 7 can also be installed via a separately provided guide.

[0050] The self-resetting device for bridge vibration reduction according to the present invention uses a connector 5 to connect the first stop 11 and the second mounting base 4 to form a planar frame structure. Connecting the first mounting base and the second mounting base into a whole improves the stress performance. The impact of the second stop 12 on the first stop 11 caused by the movement of the shaft can be transmitted to the second mounting base through the connector, effectively distributing the impact force and improving the impact resistance and limiting ability of the device. The damper dissipates energy during the movement of the second stop 12. The reset spring 7 can provide reset force and also play a buffering role, increasing the contact time between the main beam and the pier, thus reducing the impact force of the main beam on the pier. The vertical height requirements of the first mounting base, the second mounting base and the third stop are small. All other components are axially extended structures, making the device form a flat structure. This application integrates energy dissipation, limiting, reset and buffering functions well, which not only effectively improves the seismic resistance and vibration reduction capability of bridges, but is also particularly suitable for application scenarios with narrow space between piers and beams, such as simply supported beams.

[0051] Example 2 A bridge according to the present invention includes several self-resetting devices for bridge vibration reduction as described in Embodiment 1, the arrangement of which can be referred to... Figures 6-7 Between the two bearing pads 01 in the transverse direction of the bridge, the shaft is set along the longitudinal direction of the bridge. The above structure can be set at both ends of the beam and can be effectively installed between the pier top and the bottom of the beam.

[0052] In some alternative embodiments, the second mounting base 4 can be replaced by mounting it on the bottom of the beam.

[0053] In some alternative embodiments, the positions of the first mounting base and the third stop 13 may also be interchanged.

[0054] In some alternative embodiments, the shaft is replaced with one that is positioned along the transverse bridge direction, and the direction of the limiting groove formed by the two third stops 13 is also adjusted accordingly.

[0055] The bridge using the present invention can effectively balance energy dissipation capacity, impact resistance and restraint capacity, with good overall seismic performance and structural safety.

[0056] Example 3 A method for installing a vibration damping device, applied to a self-resetting device for bridge vibration damping as described in Example 1, includes the following steps: S1. Install the first mounting bracket and the second mounting bracket 4; S2, Install connector 5; S3. Install the shaft, second stop 12 and return spring 7; S4. Install damper 6; S5. Install the third stop 13 to complete the installation of the device.

[0057] Pre-install corresponding embedded parts on the pier top and beam bottom, first install the second mounting seat 4 for positioning control, and then install two first stops 11 according to the second mounting seat 4.

[0058] Then, the connector 5 is installed between the first stop 11 and the second mounting base 4.

[0059] Then, the shaft is installed, as in the structure of Embodiment 1. First, the first shaft 21 is passed through the corresponding first stop 11 and then welded to the second stop 12. Then, the second shaft 22 is passed through, the return spring 7 is sleeved on it, and then welded to the second stop 12. Of course, other assembly methods can also be used.

[0060] Then, install the damper 6 and the fourth stop 14.

[0061] Finally, install the third stop 13.

[0062] The installation method of the shock absorption device of the present invention helps to reduce the installation difficulty and improve the installation accuracy.

[0063] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-resetting device for bridge vibration damping, characterized in that, include: The first mounting base includes two spaced-apart first stops (11); A shaft body that can pass through the first stop (11) and a second stop (12) is provided on the shaft body. The movement of the second stop (12) can drive the shaft body to move longitudinally. The second stop (12) cooperates with the first stop (11) to limit the longitudinal displacement of the shaft body. Two third stops (13), the distance between the two third stops (13) is greater than the thickness of the second stop (12), and the second stop (12) can be located between the two third stops (13); The second mounting base (4) is respectively provided on both sides of the first mounting base. There is a connector (5) between the first stop (11) and the second mounting base (4). The connectors (5) can form a planar frame structure. The damper (6) is rotatably connected at both ends to the second stop (12) and the second mounting base (4). The third stop (13) moves to abut against the second stop (12) and can drive the second stop (12) to move, thereby deforming the damper (6). The reset spring (7) is used to drive the second stop (12) to reset.

2. The self-resetting device for bridge vibration damping according to claim 1, characterized in that, The shaft includes a first shaft (21) and a plurality of second shafts (22) arranged side by side. The second stop (12) is connected to the connection between the first shaft (21) and the second shaft (22). The cross-sectional dimension of the first shaft (21) is larger than that of the second shaft (22). In the initial installation state, the damper (6) is arranged at an acute angle of ≥75° with the shaft.

3. A self-resetting device for bridge vibration damping according to claim 2, characterized in that, In the initial installation state, the two second mounting seats (4) are located on both sides of the middle of the line connecting the two first stops (11), and the two dampers (6) form a V-shaped structure with the opening of the V-shaped structure facing the first shaft (21).

4. A self-resetting device for bridge vibration damping according to claim 2, characterized in that, The return spring (7) is sleeved on the second shaft (22), and the two ends of the return spring (7) are respectively connected to the second stop (12) and the corresponding first stop (11).

5. A self-resetting device for bridge vibration damping according to claim 2, characterized in that, The other end of the first shaft (21) and the other end of the second shaft (22) are each provided with a fourth stop (14). The fourth stop (14) cooperates with the first stop (11) to restrict the longitudinal displacement of the shaft.

6. A self-resetting device for bridge vibration damping according to any one of claims 1-5, characterized in that, The third stop (13) is provided with a plurality of pulleys (131), the shafts of the pulleys (131) are arranged along the height direction of the third stop (13), and the pulleys (131) are distributed longitudinally along the third stop (13).

7. A self-resetting device for bridge vibration damping according to claim 6, characterized in that, The damper (6) is a viscous damper or an eddy current damper.

8. A self-resetting device for bridge vibration damping according to claim 6, characterized in that, The second mounting base (4) includes a base (41) and a column (42), and the two third stops (13) are connected by a connecting plate (3).

9. A bridge, characterized in that, A self-resetting device for bridge vibration reduction as described in any one of claims 1-8 is provided between the two bearing pads (01) in the transverse direction of the bridge, and the shaft is arranged along the longitudinal direction of the bridge.

10. A method for installing a shock absorber, characterized in that, The method for applying a self-resetting device for bridge vibration damping as described in any one of claims 1-8 includes the following steps: S1. Install the first mounting base and the second mounting base (4); S2, Install connector (5); S3. Install the shaft, the second stop (12), and the return spring (7); S4. Install the damper (6); S5. Install the third stop (13) to complete the installation of the device.

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