Bridge hinge support anti-seismic expansion joint device
Through the innovative design of the bridge hinged seismic expansion joint device, the elastic components are used to absorb seismic vibration energy, solving the problems of misalignment and jamming of traditional devices under strong earthquakes, and realizing the structural stability and adaptability of bridges in earthquakes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DINGZHOU ANCHU SPACE TECHNOLOGY CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional bridge hinged seismic expansion joint devices are prone to misalignment of the joint pads under strong earthquakes, leading to jamming or detachment of the expansion joint, and thus failing to effectively absorb the vibration energy caused by the earthquake.
It adopts a structure consisting of a base plate, pads, movable plate, cantilever beam, and elastic components (including round rods, push blocks, sleeves, and compression springs). Through the synergistic effect of the elastic components, it absorbs and mitigates vibration, avoids misalignment and jamming, and achieves adaptability for lateral displacement ≥200mm.
It effectively absorbs seismic vibration energy, prevents bridge structures from shifting or jamming under strong earthquakes, ensures the integrity of the bridge structure, and provides ±30mm vertical vibration adaptability.
Smart Images
Figure CN224451361U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge construction technology, and in particular to a bridge hinged seismic expansion joint device. Background Technology
[0002] With the acceleration of urbanization and the increasing complexity of transportation networks, bridges are experiencing increasingly complex traffic loads and environmental factors. Especially in earthquake-prone areas, bridges not only need to withstand conventional traffic loads but also must be able to cope with seismic wave transmission and structural displacement caused by earthquakes. Therefore, the design and installation of seismic-resistant expansion joint devices has become a crucial aspect of bridge seismic design. The key function of this device is to ensure the structural integrity of the bridge during an earthquake by using reasonable expansion and contraction amounts and seismic energy dissipation methods, thus preventing catastrophic damage such as bridge fractures and displacements.
[0003] Traditional bridge hinged seismic expansion joint devices typically consist of pre-embedded steel bars, a central steel beam, a support box, a crossbeam, and elastic rubber. The elasticity of the rubber absorbs and transmits vibration forces, preventing damage to the bridge from vibration. However, in actual use, ordinary rubber or steel expansion joints are prone to misalignment of the joint pads under strong earthquakes, leading to jamming or detachment of the expansion joint. Therefore, the bridge hinged seismic expansion joint device is proposed to solve the above problems. Utility Model Content
[0004] To overcome the above deficiencies, this utility model provides a bridge hinged seismic expansion joint device, which aims to improve the problem that rubber or steel expansion joints in the prior art are prone to misalignment under strong earthquakes, leading to the expansion joint getting stuck or falling off.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A bridge hinged seismic expansion joint device includes a base plate, with multiple pads fixedly connected to the inner wall of the base plate, and a movable plate fixedly connected to the other side of each of the multiple pads. Support blocks are fixedly connected to the upper and lower sides of the inner wall of the base plate, and a cantilever beam is slidably connected to the middle of the support block. The cantilever beam is connected to the movable plate, and an elastic component is installed on the outer side of the cantilever beam.
[0007] The elastic component includes a round rod, which is rotatably connected to one end of the suspension beam away from the movable plate. A push block is fixedly connected to the other end of the round rod. A sleeve is slidably connected to the outer periphery of the push block. A fixing block is fixedly connected inside the sleeve. A compression spring is placed inside the sleeve.
[0008] As a further description of the above technical solution:
[0009] A top plate is fixedly connected to the top of the base plate, and teeth are fixedly connected to the outer side of the top plate.
[0010] As a further description of the above technical solution:
[0011] A groove is provided in the middle of the support block, and the cantilever beam is slidably connected to the middle of the groove;
[0012] As a further description of the above technical solution:
[0013] The two adjacent pads are cross-connected;
[0014] As a further description of the above technical solution:
[0015] The compression spring is located between the fixed block and the push block;
[0016] As a further description of the above technical solution:
[0017] The vertical height of the tooth is greater than 30mm.
[0018] This utility model has the following beneficial effects:
[0019] 1. In this utility model, by placing the elastic pad against the inside of the base plate, when the two base plates are brought close together due to vibration, the base plate will cause the pad to squeeze the movable plate, and the movable plate will push the suspension beam, so that the suspension beam squeezes the compression spring through the round rod. Thus, the transmission of vibration is absorbed and slowed down under the dual action of the compression spring and the pad. Furthermore, since the pad is placed against the inside of the base plate, misalignment during vibration can be avoided. Attached Figure Description
[0020] Figure 1 This is a three-dimensional schematic diagram of the bridge hinged seismic expansion joint device proposed in this utility model.
[0021] Figure 2 This is a schematic diagram of the structure of the pad block of the bridge hinged seismic expansion joint device proposed in this utility model.
[0022] Figure 3 This is a schematic diagram of the support block of the bridge hinged seismic expansion joint device proposed in this utility model.
[0023] Figure 4 This is a schematic diagram of the sleeve structure of the bridge hinged seismic expansion joint device proposed in this utility model.
[0024] Legend:
[0025] 1. Base plate; 2. Support block; 3. Cantilever beam; 4. Movable plate; 5. Sleeve; 6. Tooth; 7. Top plate; 8. Compression spring; 9. Pad block; 10. Slide groove; 11. Round rod; 12. Push block; 13. Fixing block. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] Reference Figures 1-3 An embodiment of this utility model provides a bridge hinged seismic expansion joint device, including a base plate 1. Multiple pads 9 are fixedly connected to the inner wall of the base plate 1. Movable plates 4 are fixedly connected to the other side of each pad 9. Support blocks 2 are fixedly connected to the upper and lower sides of the inner wall of the base plate 1. A cantilever beam 3 is slidably connected to the middle of the support block 2. The cantilever beam 3 is connected to the movable plate 4. An elastic component is installed on the outer side of the cantilever beam 3. The elastic component includes a round rod 11. The round rod 11 is rotatably connected to the end of the cantilever beam 3 away from the movable plate 4. A push block 12 is fixedly connected to the other end of the round rod 11. A sleeve 5 is slidably connected to the outer periphery of the push block 12. A fixing block 13 is fixedly connected to the inside of the sleeve 5. A compression spring 8 is placed inside the sleeve 5. A groove 10 is opened in the middle of the support block 2. The cantilever beam 3 is slidably connected to the middle of the groove 10. Adjacent pads 9 are cross-connected. When vibrations cause the bridge to approach each other, the base plate 1 will push the movable plate 4 through the pad 9. The movable plate 4 will push the cantilever beam 3 to slide in the middle of the support block 2, so that the cantilever beams 3 on both sides will simultaneously squeeze and push the round rod 11, thereby driving the push block 12 to squeeze the compression spring 8 in the sleeve 5. In this way, the compression spring 8 and the pad 9 will enhance the absorption and mitigation effect of vibration transmission, and achieve coordinated adaptation of lateral displacement ≥200mm. At the same time, when the bridge separates, the compression spring 8 and the pad 9 can be reset. Since the pad 9 is against the inner wall of the base plate 1, it can be displaced and fall off during strong earthquakes. Meanwhile, rotating the round rod 11 can prevent the bridge from getting stuck when it moves up and down.
[0028] Reference Figure 1 and Figure 4 A top plate 7 is fixedly connected to the top of the base plate 1, and a tooth 6 is fixedly connected to the outer side of the top plate 7. A compression spring 8 is located between the fixed block 13 and the push block 12. The vertical height of the tooth 6 is greater than 30mm. Under the action of the tooth 6 with a vertical height greater than 30mm, the overall connectivity of the device can be improved, and thus, when vertical vibration occurs, the tooth 6 can provide ±30mm of coordinated adaptation.
[0029] Working principle: When the two base plates 1 are brought close together due to vibration, the base plate 1 will drive the movable plate 4 to push the suspension beam 3 through the pad 9, so that the suspension beam 3 pushes the suspension beam 3 to slide in the support block 2 and squeeze the round rod 11. Thus, under the dual action of the compression spring 8 and the pad 9, the transmission of vibration is absorbed and slowed down, achieving coordinated adaptation of lateral displacement ≥200mm. Furthermore, since the pad 9 is placed against the base plate 1, misalignment during vibration can be avoided.
[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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. Bridge hinge anti-seismic expansion joint device, comprising a base plate (1), characterized in that: The inner wall of the base plate (1) is fixedly connected with a plurality of pads (9), and the other side of each of the plurality of pads (9) is fixedly connected with a movable plate (4). The upper and lower sides of the inner wall of the base plate (1) are fixedly connected with support blocks (2). A suspension beam (3) is slidably connected to the middle of the support block (2). The suspension beam (3) is connected to the movable plate (4). An elastic component is installed on the outer side of the suspension beam (3). The elastic component includes a round rod (11), which is rotatably connected to one end of the suspension beam (3) away from the movable plate (4). The other end of the round rod (11) is fixedly connected to a push block (12). A sleeve (5) is slidably connected to the outer periphery of the push block (12). A fixing block (13) is fixedly connected inside the sleeve (5). A compression spring (8) is placed inside the sleeve (5).
2. The bridge hinge type aseismatic expansion joint device according to claim 1, characterized in that: The top plate (7) is fixedly connected to the top of the base plate (1), and teeth (6) are fixedly connected to the outer side of the top plate (7).
3. The bridge hinge type aseismatic expansion joint device according to claim 1, characterized in that: The support block (2) has a groove (10) in the middle, and the suspension beam (3) is slidably connected to the middle of the groove (10).
4. The bridge hinged seismic expansion joint device according to claim 1, characterized in that: The two adjacent pads (9) are cross-connected.
5. The bridge hinge type aseismatic expansion joint device according to claim 1, characterized in that: The compression spring (8) is located between the fixing block (13) and the push block (12).
6. The bridge hinge type aseismatic expansion joint device according to claim 2, characterized in that: The vertical height of the tooth (6) is greater than 30 mm.