Nested large-displacement multi-curved-surface beam falling prevention device
By designing a nested, large-displacement, multi-curved anti-fall beam device, and utilizing the friction pair structure of spherical stainless steel plates and wear-resistant plates, the problem of preventing bridge beams from falling during major earthquakes is solved, achieving the function of large-displacement seismic isolation and mitigation, and avoiding the hazards of bridge beams falling.
Patent Information
- Application Number
- CN202511884513.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-02-10
AI Technical Summary
Existing bridge seismic isolation devices are prone to damage such as upward slippage and detachment and bridge beam collapse during actual earthquakes. Moreover, their design is limited by the size of the bridge and piers, and cannot meet the seismic isolation requirements for large displacements.
The device employs a nested, large-displacement, multi-curved anti-fall beam system, which includes an upper and lower swing beam. It achieves large displacement through the transition and limiting structures in the seismic isolation structure. It utilizes the friction pair of spherical stainless steel plates and wear-resistant plates to dissipate energy and prevent detachment. Combined with a spherical crown steel liner, it adapts to load disturbances.
It achieves the ability to meet temperature displacement and seismic isolation requirements under both minor and major earthquakes, preventing bridge beam collapse, without affecting the dimensional design of the bridge and piers.
Smart Images
Figure CN121496835A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of bridge bearing manufacturing, specifically relating to a nested, large-displacement, multi-curved surface anti-fall beam device. Background Technology
[0002] Currently, the displacement of bridge seismic isolation devices mainly relies on the relative sliding between the steel sliding plate and the wear-resistant material. Therefore, both temperature displacement and seismic isolation displacement are limited by the existing product dimensions. In addition, the top shape of the seismic isolation device is often limited by the planar dimensions of the steel plate at the bottom of the bridge beam, while the bottom dimension needs to match the dimensions of the pier pad. Therefore, in the actual design of bridge seismic isolation devices, designers often take into account the existing bearing dimensions and bridge structural dimensions, and adopt a compromise comprehensive displacement calculation value for the seismic displacement of the seismic isolation device to reduce the maximum peak value of the seismic wave response.
[0003] However, in actual earthquakes, there are often cases of upper swing slippage and detachment, and bridge beam collapse, indicating that its seismic isolation displacement function cannot meet the actual needs. Summary of the Invention
[0004] The main technical problem solved by this invention is to provide a nested, large-displacement, multi-curved anti-fall beam device that can achieve both anti-fall beam and large-displacement vibration reduction and isolation functions.
[0005] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a nested large displacement multi-curved surface anti-fall beam device is provided, including a device body, the device body is composed of an upper swing and a lower swing, the upper swing is disposed on the lower swing, and a vibration damping and isolation structure is provided between the upper swing and the lower swing; The vibration isolation structure includes a transition structure that can provide large displacement function and a limiting structure that limits the transition structure. The transition structure includes an upper transition plate and a lower transition plate, which respectively cooperate with the inner walls of the upper and lower swing arms.
[0006] In a preferred embodiment of the present invention, the inner walls of the upper and lower hems are provided with concave spherical surfaces, and a first spherical stainless steel plate is embedded in the concave spherical surface.
[0007] In a preferred embodiment of the present invention, a first spherical wear-resistant plate that cooperates with the first spherical stainless steel plate is provided at the connection between the upper transition plate and the lower transition plate and the upper swing and the lower swing.
[0008] In a preferred embodiment of the present invention, a spherical crown steel liner is provided between the upper transition plate and the lower transition plate, and a second spherical wear-resistant plate is embedded in the connection between the spherical crown steel liner and the upper transition plate and the lower transition plate.
[0009] In a preferred embodiment of the present invention, a second spherical stainless steel plate that cooperates with the second spherical wear-resistant plate is provided at the connection between the upper transition plate and the lower transition plate and the spherical crown steel liner.
[0010] In a preferred embodiment of the present invention, the limiting structure comprises a plurality of limiting blocks, which are symmetrically arranged on both sides of the upper swing, the lower swing, the upper transition plate, and the lower transition plate.
[0011] The beneficial effects of the present invention are as follows: The present invention provides a nested large displacement multi-curved surface anti-fall beam device. The device adopts a vibration reduction and isolation structure, which can not only meet the temperature displacement and vibration reduction and isolation displacement requirements under small earthquake conditions, but also has the vibration reduction and isolation function to achieve large displacement under large earthquake conditions, thus preventing the bridge from falling. Attached Figure Description
[0012] Figure 1 This is an exploded view of a nested, large-displacement, multi-curved anti-fall beam device.
[0013] Figure 2 This is a front view of a nested, large-displacement, multi-curved surface anti-fall beam device.
[0014] Figure 3 This is a schematic diagram of a nested, large-displacement, multi-curved anti-fall beam device, showing its temperature displacement or ultimate displacement under minor earthquakes.
[0015] Figure 4 This is a schematic diagram of the ultimate displacement of a nested, large-displacement, multi-curved anti-fall beam device under a major earthquake.
[0016] The components in the attached diagram are labeled as follows: 1. Upper swing; 2. Lower swing; 3. Upper transition plate; 4. Lower transition plate; 5. First spherical stainless steel plate; 6. Second spherical stainless steel plate; 7. First spherical wear-resistant plate; 8. Second spherical wear-resistant plate; 9. Spherical crown steel liner; 10. Limiting block. Detailed Implementation
[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.
[0018] Please see Figures 1 to 4 A nested, large-displacement, multi-curved anti-fall beam device includes a device body, which is composed of an upper swing 1 and a lower swing 2. The upper swing 1 is mounted on the lower swing 2, and the upper part of the upper swing 1 contacts the bottom of the bridge beam to transfer the load of the superstructure.
[0019] The lower part of the lower swing 2 contacts the top pad stone of the pier, transferring the load of the upper structure to the pier.
[0020] A seismic isolation structure is provided between the upper swing 1 and the lower swing 2, which can meet the requirements of temperature displacement and seismic isolation displacement under small earthquake conditions, and also has the function of seismic isolation to achieve large displacement under large earthquake conditions, thus preventing the bridge from falling down.
[0021] The terms "minor earthquake" and "major earthquake" refer to the magnitude of the earthquake.
[0022] The vibration reduction and isolation structure includes a transition structure that can provide large displacement function and a limiting structure that limits the transition structure. The limiting structure consists of a plurality of limiting blocks 10, which are symmetrically arranged on both sides of the upper swing 1, the lower swing 2, the upper transition plate 3 and the lower transition plate 4.
[0023] The limiting structure is used to limit the movement under maximum displacement, preventing the upper swing 1 and the lower swing 2 from separating under extreme displacement conditions and causing the beam to fall.
[0024] The transition structure includes an upper transition plate 3 and a lower transition plate 4. The upper transition plate 3 and the lower transition plate 4 respectively cooperate with the inner walls of the upper swing 1 and the lower swing 2. The upper transition plate 3 and the lower transition plate 4 can realize temperature displacement and vibration reduction displacement through the upper and lower sliding surfaces.
[0025] The inner walls of the upper swing 1 and the lower swing 2 are provided with concave spherical surfaces, and a first spherical stainless steel plate 5 is embedded in the concave spherical surface. The first spherical stainless steel plate 5 is welded to the upper swing 1 and forms a friction pair with the first spherical wear-resistant plate 7.
[0026] The upper transition plate 3 and the lower transition plate 4 are provided with a first spherical wear-resistant plate 7 that cooperates with the first spherical stainless steel plate 5 at the connection between them and the upper swing 1 and the lower swing 2.
[0027] A spherical crown steel liner 9 is provided between the upper transition plate 3 and the lower transition plate 4. A second spherical wear-resistant plate 8 is embedded in the connection between the spherical crown steel liner 9 and the upper transition plate 3 and the lower transition plate 4. While transmitting the upper vertical load, the spherical crown steel liner 9 can adapt to the disturbance of the upper bridge structure due to load and other reasons by rotating.
[0028] The upper transition plate 3 and the lower transition plate 4 are provided with a second spherical stainless steel plate 6 at the connection with the spherical crown steel liner 9, which cooperates with the second spherical wear-resistant plate 8. The second spherical stainless steel plate 6 is welded to the upper transition plate 3 and the lower transition plate 4 respectively, and forms a friction pair with the second spherical wear-resistant plate 8.
[0029] Both the first spherical wear-resistant plate 7 and the second spherical wear-resistant plate 8 are made of polymer materials.
[0030] During an earthquake, displacement occurs between the spherical crown steel liner 9 and the upper transition plate 3 and the lower transition plate 4, as well as between the upper transition plate 3 and the lower transition plate 4 and the upper swing 1 and the lower swing 2. Energy is dissipated through friction between the first spherical stainless steel plate 5 and the first spherical wear-resistant plate 7, and between the second spherical stainless steel plate 6 and the second spherical wear-resistant plate 8. At the same time, the height of each device changes, thereby converting earthquake energy into potential energy and achieving a significant seismic isolation effect.
[0031] Compared with existing technologies, the present invention provides a nested large displacement multi-curved surface anti-falling beam device. This device adopts a seismic isolation structure, which can meet the temperature displacement and seismic isolation displacement requirements under small earthquake conditions, and also has the seismic isolation function to achieve large displacement under large earthquake conditions, thus preventing the bridge from falling.
[0032] The device's planar dimensions remain largely unchanged, only its height is increased, and it has no impact on the dimensions of the bridge beam bottom components or the pier top pad stones.
[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0034] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.
Claims
1. A nested, large-displacement, multi-curved surface anti-fall beam device, comprising a device body, the device body being composed of an upper swing and a lower swing, the upper swing being disposed on the lower swing, characterized in that, A vibration damping and isolation structure is provided between the upper swing and the lower swing; The vibration isolation structure includes a transition structure that can provide large displacement function and a limiting structure that limits the transition structure. The transition structure includes an upper transition plate and a lower transition plate, which respectively cooperate with the inner walls of the upper and lower swing arms.
2. The nested large-displacement multi-curved surface anti-fall beam device according to claim 1, characterized in that, The inner walls of the upper and lower hems are provided with concave spherical surfaces, and a first spherical stainless steel plate is embedded in the concave spherical surface.
3. The nested large-displacement multi-curved surface anti-fall beam device according to claim 2, characterized in that, The upper transition plate and the lower transition plate are provided with a first spherical wear-resistant plate that cooperates with the first spherical stainless steel plate at the connection between the upper swing and the lower swing.
4. The nested large-displacement multi-curved surface anti-fall beam device according to claim 1, characterized in that, A spherical crown steel liner is provided between the upper transition plate and the lower transition plate, and a second spherical wear-resistant plate is embedded in the connection between the spherical crown steel liner and the upper transition plate and the lower transition plate.
5. A nested large-displacement multi-curved surface anti-fall beam device according to claim 4, characterized in that, The upper transition plate and the lower transition plate are provided with a second spherical stainless steel plate that matches the second spherical wear-resistant plate at the connection between the upper transition plate and the spherical crown steel liner.
6. A nested large-displacement multi-curved surface anti-fall beam device according to claim 1, characterized in that, The limiting structure consists of several limiting blocks, which are symmetrically arranged on both sides of the upper swing, the lower swing, the upper transition plate, and the lower transition plate.