Secondary energy dissipation anti-beam-falling device

Abstract

The utility model relates to bridge seismic technology field, aims at solving the problem that the current anti -falling beam device only has one -level energy -dissipation ability and is not recoverable or the recovery difficulty and cost are higher after energy -dissipation, provides a two -level energy -dissipation anti -falling beam device, including upper connecting seat, lower connecting seat and pull rod, one end of pull rod is connected with upper connecting seat, pull rod passes through the limiting hole setting on lower connecting seat, and pull rod has the gap between limiting hole, the other end of pull rod is connected with the limiting platform, be provided with energy -dissipation piece on pull rod, energy -dissipation piece is arranged between limiting platform and lower connecting seat, and energy -dissipation piece has the interval between limiting platform, lower connecting seat, the utility model discloses anti -falling beam device has two -level energy -dissipation ability, and one -level energy -dissipation resets energy -dissipation piece, and two -level energy -dissipation replaces energy -dissipation piece, the utility model discloses anti -falling beam device not only can recover, and recovery difficulty is small, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of bridge seismic resistance technology, and more specifically, to a secondary energy-dissipating anti-falling beam device. Background Technology

[0002] Anti-falling beam devices are a key structural component for bridge seismic resistance, and are widely used in bridge projects in high seismic intensity areas. Existing anti-falling beam devices mainly serve to limit the displacement between beams and piers. Some anti-falling beam devices have energy dissipation functions, but they usually only have level one energy dissipation capacity and are either irreversible or difficult and costly to restore after energy dissipation. Utility Model Content

[0003] The present invention aims to provide a secondary energy-consuming anti-falling beam device to solve the problem that existing anti-falling beam devices only have a primary energy-consuming capability and cannot be restored after energy consumption or are difficult and costly to restore.

[0004] This utility model is achieved using the following technical solution: This utility model provides a secondary energy-consuming anti-falling beam device, including an upper connecting seat, a lower connecting seat, and a pull rod. One end of the pull rod is connected to the upper connecting seat, and the pull rod passes through a limiting hole on the lower connecting seat. There is a gap between the pull rod and the limiting hole, and the other end of the pull rod is connected to a limiting platform. The pull rod is equipped with an energy-consuming component, which is arranged between the limiting platform and the lower connecting seat, and there is a gap between the energy-consuming component and the limiting platform and the lower connecting seat.

[0005] Because there is a gap between the tie rod and the limiting hole, and the two are in clearance fit, and there is a distance between the energy dissipation component and the lower connecting seat, the tie rod can move relative to the lower connecting seat, and the distance between the energy dissipation component and the lower connecting seat meets the daily displacement of the bridge.

[0006] When an E1 earthquake occurs, the upper connecting seat drives the pull rod to move away from the lower connecting seat. At this time, the energy dissipating component moves with the pull rod to the limiting hole on the lower connecting seat and is limited by the lower connecting seat. As the displacement continues to increase, the energy dissipating component slides on the pull rod under the action of the seismic force, and friction occurs between the energy dissipating component and the pull rod, realizing first-level friction energy dissipation.

[0007] When an E2 earthquake occurs, the displacement between the upper connecting seat and the lower connecting seat further increases, the energy dissipation component slides to the tail of the tie rod, and the limiting platform causes the energy dissipation component to undergo plastic deformation until it is destroyed, thus achieving secondary yield energy dissipation.

[0008] That is, the energy-consuming component can slide on the tie rod and can undergo yielding deformation. The energy-consuming component slides on the tie rod to achieve primary energy consumption, and the energy-consuming component yields to achieve secondary energy consumption.

[0009] The anti-falling beam device of this utility model has a two-stage energy consumption capability. After the first stage of energy consumption, the energy-consuming component can be reset, and after the second stage of energy consumption, the energy-consuming component can be replaced. The anti-falling beam device of this utility model is not only recoverable, but also easy to recover and low in cost.

[0010] As a preferred technical solution: The circumferential dimension of the limiting platform is larger than the dimension of the limiting hole.

[0011] As a preferred technical solution: The pull rod includes a hinge plate, a round tube, and a sealing plate. The sealing plate is fixedly connected to one end of the round tube, one end of the hinge plate is fixedly connected to the sealing plate, the other end of the hinge plate is connected to the ear plate of the upper connecting seat through a pin, and the other end of the round tube is fixedly connected to the limiting platform.

[0012] As a preferred technical solution: The lower connecting seat includes a base plate and a limiting plate. The limiting plate is arranged perpendicular to the surface of the base plate and is fixedly connected to the base plate. The limiting hole is formed on the limiting plate, and the round tube is clearance-fitted with the limiting hole.

[0013] As a preferred technical solution: The lower connecting seat also includes a stiffening plate, which is arranged perpendicular to the surface of the base plate and the limiting plate, and is fixedly connected to the base plate and the limiting plate.

[0014] As a preferred technical solution: The energy-consuming component includes a clamp, which includes two semi-circular rings. The two rings are fastened to the outside of the circular tube and are connected by a pre-tightening connector.

[0015] As a preferred technical solution: The pre-tightening connector uses bolts.

[0016] As a preferred technical solution: The limiting platform includes a frustum, and the clamp has a chamfered edge on the side facing the limiting platform. The chamfer is adapted to the side of the frustum, and the chamfer has the same taper as the frustum.

[0017] As a preferred technical solution: The limiting hole has a chamfer on the side facing the limiting platform, and the chamfer has the same taper as the frustum.

[0018] As a preferred technical solution: The clamp has a V-shaped groove on the side facing the limiting platform.

[0019] As a preferred technical solution: The secondary energy-consuming anti-falling beam device is installed between beam piers or beams.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: The anti-fall beam device of this invention has a two-stage energy dissipation function, which allows bridge design to be tailored for E1 and E2 earthquakes, resulting in a better bridge seismic isolation system design and improved performance. The anti-fall beam device of this invention has a simple structure and low cost, making full use of the friction and yield strength of the materials, and one component can achieve multiple functions. The anti-fall beam device of this invention is easy to restore after an earthquake, requiring only local adjustments or replacement of parts, making construction convenient and cost-effective. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the secondary energy-consuming anti-falling beam device described in this utility model.

[0022] Figure 2 This is a cross-sectional view of the secondary energy-consuming anti-falling beam device of this utility model.

[0023] Figure 3 for Figure 2 A cross-sectional view along the AA direction.

[0024] Icons: 1-Upper connecting seat, 2-Pin shaft, 3-Tie rod, 301-Long hinge plate, 302-Steel pipe, 303-Sealing plate, 4-Clamp, 5-Lower connecting seat, 501-Base plate, 502-Limiting plate, 503-Firming plate, 6-Anchor bolt, 7-Limiting platform. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Example 1 like Figures 1-3 As shown, this embodiment proposes a two-stage energy-consuming anti-falling beam device, including an upper connecting seat 1, a lower connecting seat 5, and a tie rod 3.

[0027] Preferably, the anti-falling beam device can be installed on the beam pier or between beams by anchor bolts 6, that is, the upper connecting seat 1 is used to connect with the beam body, and the lower connecting seat 5 is used to connect with the pier or another beam body.

[0028] One end of the pull rod 3 is connected to the upper connecting seat 1. The pull rod 3 passes through a limiting hole on the lower connecting seat 5, with a gap between the pull rod 3 and the limiting hole. The other end of the pull rod 3 is connected to a limiting platform 7. Therefore, the pull rod 3 can move relative to the lower connecting seat 5. An energy-dissipating component is provided on the pull rod 3, arranged between the limiting platform 7 and the lower connecting seat 5, with a distance between the energy-dissipating component and the limiting platform 7 and the lower connecting seat 5. The energy-dissipating component can slide on the pull rod 3 and can undergo yield deformation. The sliding on the pull rod 3 achieves primary energy dissipation, and the yield deformation achieves secondary energy dissipation.

[0029] With the above structure, since there is a gap between the tie rod 3 and the limiting hole, the two are in clearance fit, and there is a distance between the energy dissipating component and the lower connecting seat 5, the tie rod 3 can move relative to the lower connecting seat 5. The distance between the energy dissipating component and the lower connecting seat 5 meets the daily displacement of the bridge. During the daily displacement of the bridge, the displacement range of the tie rod 3 is the distance between the energy dissipating component and the lower connecting seat 5, and at this time the energy dissipating component does not move on the tie rod 3.

[0030] When an E1 earthquake occurs, the upper connecting seat 1 drives the pull rod 3 to move away from the lower connecting seat 5. At this time, the energy dissipating component moves with the pull rod 3 to the limiting hole on the lower connecting seat 5 and is limited by the lower connecting seat 5. As the displacement continues to increase, the energy dissipating component slides on the pull rod 3 under the action of the seismic force. Friction occurs between the energy dissipating component and the pull rod 3, realizing first-level friction energy dissipation. The friction energy dissipation capability is controlled by the friction force between the energy dissipating component and the pull rod 3. The displacement of the first-level friction energy dissipation is controlled by the distance between the energy dissipating component and the limiting platform 7. The friction sliding range of the energy dissipating component is this distance between the energy dissipating component and the limiting platform 7.

[0031] When an E2 earthquake occurs, the displacement between the upper connecting seat 1 and the lower connecting seat 5 further increases, the energy dissipation component slides to the tail of the tie rod 3, and the limiting platform 7 causes the energy dissipation component to undergo plastic deformation until it is destroyed, realizing secondary yield energy dissipation. The displacement of the secondary yield energy dissipation is controlled by the length of the energy dissipation component.

[0032] During post-earthquake recovery, if the anti-falling beam device only experiences first-level frictional energy consumption and the energy-consuming component only experiences localized wear, the energy-consuming component can be reused; simply resetting the energy-consuming component is sufficient. If the anti-falling beam device experiences second-level yielding energy consumption, then the energy-consuming component needs to be replaced.

[0033] As can be seen from the above, the anti-falling beam device of this utility model has three levels of displacement, such as... Figure 2 As shown. The first-level displacement is the daily temperature displacement, which is controlled by the distance between the energy-consuming component and the lower connecting seat 5. The second-level displacement is the friction energy-consuming displacement, which is controlled by the distance between the tail of the energy-consuming component and the limiting platform 7. The third-level displacement is the yield energy-consuming displacement, which is controlled by the length of the energy-consuming component.

[0034] Compared to existing technologies, the anti-falling beam device of this invention achieves two-stage energy dissipation. The first stage dissipates energy through friction of the energy-dissipating components, while the second stage dissipates energy through yielding of these components, respectively meeting the seismic energy dissipation requirements for E1 and E2 earthquakes. This anti-falling beam device breaks through the limitations of traditional single energy dissipation mechanisms. Through a two-stage energy dissipation design, it achieves the seismic goals of graded defense, on-demand energy dissipation, and precise protection. By matching seismic loads in stages, it optimizes energy dissipation under all working conditions. Through a dual protection mechanism, it enhances the structural seismic redundancy and reduces post-earthquake recovery costs.

[0035] Preferably, the circumferential dimension of the limiting platform 7 is larger than the dimension of the limiting hole. After the secondary energy consumption is completed, the anti-falling beam device of this utility model can also achieve the maximum anti-falling beam displacement and the maximum anti-falling beam force through the limiting platform 7 at the tail of the pull rod 3 and the lower connecting seat 5.

[0036] Preferably, the pull rod 3 includes a long hinge plate 301, a steel pipe 302 (or round steel), and a sealing plate 303. The sealing plate 303 is fixedly connected to one end of the steel pipe 302. One end of the long hinge plate 301 is fixedly connected to the sealing plate 303. The other end of the long hinge plate 301 is connected to the ear plate of the upper connecting seat 1 via a pin 2. Both the long hinge plate 301 and the ear plate of the upper connecting seat 1 have pin holes. The pin 2 passes through the ear plate of the upper connecting seat 1 and the long hinge plate 301, connecting the pull rod 3 to the upper connecting seat 1. The other end of the steel pipe 302 is fixedly connected to the limiting platform 7.

[0037] Preferably, the lower connecting seat 5 includes a base plate 501, a limiting plate 502, and a reinforcing rib 503. The limiting plate 502 is perpendicular to the surface of the base plate 501 and is fixedly connected to the base plate 501. The reinforcing rib 503 is perpendicular to the surfaces of the base plate 501 and the limiting plate 502 and is fixedly connected to both the base plate 501 and the limiting plate 502. A limiting hole is formed on the limiting plate 502, and the pull rod 3 passes through this hole. Specifically, the steel pipe 302 is clearance-fitted with the limiting hole.

[0038] Preferably, the base plate 501 is connected with anchor bolts 6.

[0039] Preferably, the energy-consuming component includes a clamp 4, which comprises two semi-circular rings. The two rings are fastened to the outside of the steel pipe 302 and connected by bolts. The clamp 4 is pre-tightened and fixed to the pull rod 3 by the bolts. There is a gap between the clamp 4 and the limiting plate 502 and the limiting platform 7.

[0040] Preferably, the limiting platform 7 includes a frustum, and the clamp 4 has a chamfered edge on the side facing the limiting platform 7, which is adapted to the side of the frustum. The chamfer has the same taper as the frustum, thus facilitating the clamp 4 to slide onto the frustum and be spread open by the frustum, causing it to undergo expansion and plastic deformation until it breaks. The limiting hole has a chamfered edge on the side facing the limiting platform 7, which has the same taper as the frustum, thus reducing the compressive stress at the extreme position.

[0041] With the above structure, since the tie rod 3 and the limiting hole on the limiting plate 502 are in clearance fit, and there is a gap between the clamp 4 and the limiting plate 502, the tie rod 3 can move relative to the lower connecting seat 5, and the gap between the clamp 4 and the limiting plate 502 can meet the daily displacement of the bridge.

[0042] When an E1 earthquake occurs, the upper connecting seat 1 pulls the tie rod 3 away from the lower connecting seat 5 via the pin 2. At this time, the clamp 4 moves with the tie rod 3 to the limiting plate 502 and is limited. As the displacement continues to increase, the clamp 4 slides on the tie rod 3 under the action of the seismic force, and friction occurs between the clamp 4 and the tie rod 3, realizing first-level friction energy dissipation. The friction energy dissipation capacity can be controlled by the preload of the two rows of preload bolts on the clamp 4, and the displacement for friction energy dissipation is controlled by the distance from the clamp 4 to the end frustum of the tie rod 3.

[0043] When an E2 earthquake occurs, the displacement of the upper connecting seat 1 and the lower connecting seat 5 increases further. The clamp 4 slides to the tail of the tie rod 3. In order to limit the upper limit of the E2 anti-fall beam force and determine the location of the failure, the tail of the clamp 4 is provided with a circumferential chamfer and a longitudinal V-groove. The frustum at the tail of the tie rod 3 can cause the clamp 4 to undergo expansion plastic deformation until failure, realizing secondary yield energy dissipation. The displacement of the secondary yield energy dissipation is controlled by the length of the clamp 4.

[0044] During post-earthquake recovery, if the anti-fall beam device only experiences first-level frictional energy dissipation and the clamp 4 only experiences localized wear, the clamp 4 can be reused; simply resetting the clamp 4 is sufficient. If the anti-fall beam device experiences second-level yielding energy dissipation, then the clamp 4 should be replaced.

[0045] Preferably, the inner cylindrical surface of the clamp 4 and the cylindrical surface of the tie rod 3 are shot blasted to increase the roughness of the friction surface and thus increase its friction coefficient, thereby increasing the friction energy dissipation capacity.

[0046] The anti-fall beam device of this utility model is easy to restore after an earthquake. For earthquake E1, only the position of clamp 4 needs to be adjusted, and for earthquake E2, only clamp 4 needs to be replaced.

[0047] The anti-fall beam device of this invention has a two-stage energy dissipation function, which allows bridge design to be tailored for E1 and E2 earthquakes, resulting in a better bridge seismic isolation system design and improved performance. The anti-fall beam device of this invention has a simple structure and low cost, making full use of the friction and yield strength of the materials, and one component can achieve multiple functions. The anti-fall beam device of this invention is easy to restore after an earthquake, requiring only local adjustments or replacement of parts, making construction convenient and cost-effective.

[0048] The anti-falling beam device of this utility model can meet the daily longitudinal displacement, transverse displacement and rotation between beams and piers. The longitudinal displacement is achieved by the distance between the clamp 4 and the lower connecting seat 5, the transverse displacement is achieved by the gap between the long hinge plate 301 of the tie rod 3 and the upper connecting seat 1, and the rotation is achieved by the gap between the tie rod 3 and the lower connecting seat 5 and the upper connecting seat 1 and the rotation angle.

[0049] The anti-falling beam device of this utility model is applicable to various simply supported beam bridges and continuous beam bridges (T-beams, small box girders, box girders, hollow slab beams, etc.), and has a wide range of applications.

[0050] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A secondary energy-consuming beam-prevention device, characterized in that: It includes an upper connecting seat, a lower connecting seat, and a pull rod. One end of the pull rod is connected to the upper connecting seat, and the pull rod passes through a limiting hole on the lower connecting seat. There is a gap between the pull rod and the limiting hole, and the other end of the pull rod is connected to a limiting platform. The pull rod is equipped with an energy-consuming component, which is arranged between the limiting platform and the lower connecting seat, and there is a gap between the energy-consuming component and the limiting platform and the lower connecting seat.

2. The secondary energy-consuming anti-falling beam device according to claim 1, characterized in that: The circumferential dimension of the limiting platform is larger than the dimension of the limiting hole.

3. The secondary energy-consuming anti-falling beam device according to claim 1, characterized in that: The pull rod includes a hinge plate, a round tube, and a sealing plate. The sealing plate is fixedly connected to one end of the round tube, one end of the hinge plate is fixedly connected to the sealing plate, the other end of the hinge plate is connected to the ear plate of the upper connecting seat through a pin, and the other end of the round tube is fixedly connected to the limiting platform.

4. The secondary energy-consuming anti-falling beam device according to claim 3, characterized in that: The lower connecting seat includes a base plate and a limiting plate. The limiting plate is arranged perpendicular to the surface of the base plate and is fixedly connected to the base plate. The limiting hole is formed on the limiting plate, and the round tube is clearance-fitted with the limiting hole.

5. The secondary energy-consuming anti-falling beam device according to claim 4, characterized in that: The lower connecting seat also includes a stiffening plate, which is arranged perpendicular to the surface of the base plate and the limiting plate, and is fixedly connected to the base plate and the limiting plate.

6. The secondary energy-consuming anti-falling beam device according to claim 3, characterized in that: The energy-consuming component includes a clamp, which includes two semi-circular rings. The two rings are fastened to the outside of the circular tube and are connected by a pre-tightening connector.

7. The secondary energy-consuming anti-falling beam device according to claim 6, characterized in that: The limiting platform includes a frustum, and the clamp has a chamfered edge on the side facing the limiting platform. The chamfer is adapted to the side of the frustum, and the chamfer has the same taper as the frustum.

8. The secondary energy-consuming anti-falling beam device according to claim 7, characterized in that: The limiting hole has a chamfer on the side facing the limiting platform, and the chamfer has the same taper as the frustum.

9. The secondary energy-consuming anti-falling beam device according to claim 6, characterized in that: The clamp has a V-shaped groove on the side facing the limiting platform.

10. The secondary energy-dissipating anti-falling beam device according to any one of claims 1-9, characterized in that: The secondary energy-consuming anti-falling beam device is installed between beam piers or beams.

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