Anti-seismic isolation device for bridge

Abstract

The utility model discloses a bridge anti-seismic isolation device which comprises a main beam, a bridge pier and a bridge floor, the upper surface of the bridge pier is fixedly connected with a plurality of hydraulic bases, the upper ends of the interiors of the hydraulic bases are connected with hydraulic footstocks in a sliding mode, and the upper ends of the hydraulic footstocks are fixedly connected to the lower surface of a connecting plate. The first shock isolation plate, the second shock isolation plate, the hydraulic base and the hydraulic top seat are arranged on the bridge floor, the connecting plate is arranged at the lower end of the bridge floor, a telescopic rod structure is arranged between the connecting plate and the bridge floor, and a steel bar spring is arranged on the surface of the telescopic rod structure. The comprehensive system can effectively absorb and disperse earthquake energy, reduce vibration and displacement of a bridge structure, improve the stability and safety of the bridge, prolong the service life of the bridge and guarantee the continuity and safety of traffic.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge earthquake resistance, and in particular relates to a bridge earthquake resistance isolation device. Background Art

[0002] Bridge seismic isolation devices are technical devices used in bridge structures to reduce damage caused by earthquakes. These devices are typically installed at bridge supports or joints, allowing the bridge to move slightly during an earthquake, thereby absorbing and dissipating seismic energy and mitigating the impact on the bridge.

[0003] While there are a variety of designs for bridge seismic isolation devices, currently common technologies include springs and improved bridge seismic isolation materials. These methods are widely used due to their low cost and ease of maintenance. However, they have limitations in terms of stability and adaptability. Spring isolation devices rely on the elasticity of metal springs to absorb seismic energy. While cost-effective and easy to maintain, their stability and adaptability may not be as good as more advanced technologies when faced with seismic waves of varying frequencies and intensities. Similarly, while improved isolation materials can improve seismic performance to a certain extent, they are still limited by the inherent properties of their materials and designs. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a bridge seismic isolation device to solve the problem that the spring isolation device proposed in the above-mentioned background technology relies on the elasticity of the metal spring to absorb seismic energy. Although it is cost-effective and easy to maintain, its stability and adaptability when facing seismic waves of different frequencies and intensities may not be as good as more advanced technologies. Similarly, although the improved isolation material can improve the seismic performance to a certain extent, it is still limited by the inherent characteristics of its material and design.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bridge seismic isolation device, comprising a main beam, bridge piers and a bridge deck, wherein the upper surface of the bridge pier is fixedly connected to a plurality of hydraulic bases, the inner upper end of the hydraulic base is slidably connected to a hydraulic top seat, the upper end of the hydraulic top seat is fixedly connected to the lower surface of a connecting plate, the connecting plate is arranged at the lower end of the bridge deck, a telescopic rod structure is arranged between the connecting plate and the bridge deck, a steel spring is arranged on the surface of the telescopic rod structure, a second seismic isolation plate is arranged between the bridge pier and the connecting plate, and a first seismic isolation plate is arranged between the connecting plate and the bridge deck.

[0006] Preferably, the first isolation plate and the second isolation plate are both made of high-damping rubber material.

[0007] Preferably, the telescopic rod structure is made of alloy material.

[0008] Preferably, the pier is fixedly connected to the upper end of the main beam.

[0009] Preferably, a plurality of the telescopic rod structures and the steel springs are provided, and the plurality of telescopic rod structures and the steel springs are evenly distributed between the connecting plate and the bridge deck.

[0010] Preferably, the interior of the hydraulic base is a vacuum environment.

[0011] Preferably, enclosures are fixedly connected to both sides of the bridge deck.

[0012] Compared with the existing technology, this utility model provides a bridge seismic isolation device with the following features:

[0013] Beneficial effects:

[0014] 1. The utility model significantly improves the seismic performance of the bridge through the coordinated use of the telescopic rod structure, steel spring, first seismic isolation plate, second seismic isolation plate, hydraulic base and hydraulic top seat. This integrated system can effectively absorb and disperse seismic energy, reduce the vibration and displacement of the bridge structure, improve the stability and safety of the bridge, and at the same time extend the service life of the bridge, ensuring the continuity and safety of traffic. It effectively avoids the spring isolation device relying on the elasticity of the metal spring to absorb seismic energy. Although it is cost-effective and easy to maintain, its stability and adaptability in the face of seismic waves of different frequencies and intensities may not be as good as more advanced technologies. Similarly, although the improved isolation material can improve seismic performance to a certain extent, it is still limited by the inherent characteristics of its material and design.

[0015] 2. The utility model provides a first isolation plate and a second isolation plate, and the first isolation plate and the second isolation plate are made of high-damping rubber material, which can provide higher damping characteristics, effectively reduce the vibration response of the bridge during an earthquake, and improve the structural stability and safety between the bridge deck and the connecting plate, and between the connecting plate and the bridge pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is an axonometric drawing of a bridge seismic isolation device proposed in the utility model;

[0018] Figure 2 This is a three-dimensional schematic diagram of a bridge seismic isolation device proposed by the utility model;

[0019] Figure 3This is a front view of a bridge seismic isolation device proposed by the utility model;

[0020] Figure 4 This is a schematic diagram of the surface of a connecting plate in a bridge seismic isolation device proposed in the present invention;

[0021] Figure 5 A bridge seismic isolation device proposed by the utility model Figure 4 Enlarged view of point A in the middle;

[0022] Figure 6 This is a three-dimensional schematic diagram of the surface of a bridge pier in a bridge seismic isolation device proposed by the present invention;

[0023] In the figure: 1. Main beam; 2. Bridge pier; 3. Bridge deck; 4. Guardrail; 5. Hydraulic base; 6. Hydraulic top seat; 7. Connecting plate; 8. Telescopic rod structure; 9. Steel spring; 10. First seismic isolation plate; 11. Second seismic isolation plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-6The utility model provides a technical solution: a bridge seismic isolation device, including a main beam 1, a pier 2 and a bridge deck 3, the upper surface of the pier 2 is fixedly connected with a plurality of hydraulic bases 5, the upper end of the inner portion of the hydraulic base 5 is slidably connected with a hydraulic top seat 6, the upper end of the hydraulic top seat 6 is fixedly connected to the lower surface of the connecting plate 7, the connecting plate 7 is arranged at the lower end of the bridge deck 3, a telescopic rod structure 8 is arranged between the connecting plate 7 and the bridge deck 3, a steel spring 9 is arranged on the surface of the telescopic rod structure 8, a second seismic isolation plate 11 is arranged between the pier 2 and the connecting plate 7, a first seismic isolation plate 10 is arranged between the connecting plate 7 and the bridge deck 3, The pressure base 5 and the hydraulic top seat 6 and other structures cooperate with each other to significantly improve the seismic performance of the bridge. This integrated system can effectively absorb and disperse seismic energy, reduce the vibration and displacement of the bridge structure, improve the stability and safety of the bridge, and at the same time extend the service life of the bridge, ensure the continuity and safety of traffic, and effectively avoid the spring isolation device relying on the elasticity of the metal spring to absorb seismic energy. Although it is cost-effective and easy to maintain, its stability and adaptability may not be as good as more advanced technologies when facing seismic waves of different frequencies and intensities. Similarly, although the improved isolation material can improve the seismic performance to a certain extent, it is still limited by the inherent characteristics of its material and design.

[0026] In the present invention, preferably, the first seismic isolation plate 10 and the second seismic isolation plate 11 are both made of high-damping rubber material. By setting the first seismic isolation plate 10 and the second seismic isolation plate 11, and the first seismic isolation plate 10 and the second seismic isolation plate 11 are made of high-damping rubber material, higher damping characteristics can be provided, effectively reducing the vibration response of the bridge during an earthquake, and improving the structural stability and safety between the bridge deck 3 and the connecting plate 7, and between the connecting plate 7 and the pier 2.

[0027] In the present invention, preferably, the telescopic rod structure 8 is made of alloy material.

[0028] In the present invention, preferably, the pier 2 is fixedly connected to the upper end of the main beam 1 .

[0029] In the present invention, preferably, a plurality of telescopic rod structures 8 and steel springs 9 are provided, and the plurality of telescopic rod structures 8 and steel springs 9 are evenly distributed between the connecting plate 7 and the bridge deck 3 .

[0030] In the present invention, preferably, the interior of the hydraulic base 5 is a vacuum environment.

[0031] In the present invention, preferably, both sides of the bridge deck 3 are fixedly connected with enclosures 4 .

[0032] The working principle and usage process of the present invention are as follows: When using the bridge seismic isolation device, first, when an earthquake occurs, the first and second isolation plates 10, 11, made of high-damping rubber, begin to function. These high-damping rubber isolation plates provide high damping properties, effectively reducing the bridge's vibration response during an earthquake and improving the structural stability and safety between the bridge deck 3 and the connecting plate 7, and between the connecting plate 7 and the pier 2. At this point, the alloy telescopic rod structure 8 and steel springs 9, evenly distributed between the connecting plate 7 and the bridge deck 3, further absorb and disperse seismic energy, reducing vibration and displacement of the bridge structure. Then, the internal vacuum environment of the hydraulic base 5 begins to operate, working in conjunction with the hydraulic top seat 6 to provide sufficient support and stability. Finally, the enclosure 4 is fixedly connected to both sides of the bridge deck 3 to ensure traffic continuity and safety. Overall, the coordinated use of the telescopic rod structure 8, steel springs 9, first and second isolation plates 10, 11, hydraulic base 5, and hydraulic top seat 6 significantly enhances the bridge's seismic performance, effectively absorbing and dissipating seismic energy, improving the bridge's stability and safety, and extending its service life.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bridge seismic isolation device, comprising a main beam (1), a bridge pier (2) and a bridge deck (3), characterized in that: The upper surface of the pier (2) is fixedly connected to a plurality of hydraulic bases (5), the inner upper end of the hydraulic base (5) is slidably connected to a hydraulic top seat (6), the upper end of the hydraulic top seat (6) is fixedly connected to the lower surface of a connecting plate (7), the connecting plate (7) is arranged at the lower end of the bridge deck (3), a telescopic rod structure (8) is arranged between the connecting plate (7) and the bridge deck (3), a steel spring (9) is arranged on the surface of the telescopic rod structure (8), a second seismic isolation plate (11) is arranged between the pier (2) and the connecting plate (7), and a first seismic isolation plate (10) is arranged between the connecting plate (7) and the bridge deck (3).

2. A bridge seismic isolation device according to claim 1, characterized in that: The first vibration isolation plate (10) and the second vibration isolation plate (11) are both made of high-damping rubber material.

3. The bridge seismic isolation device according to claim 1, characterized in that: The telescopic rod structure (8) is made of alloy material.

4. The bridge seismic isolation device according to claim 1, characterized in that: The bridge pier (2) is fixedly connected to the upper end of the main beam (1).

5. The bridge seismic isolation device according to claim 1, characterized in that: A plurality of the telescopic rod structures (8) and the steel springs (9) are provided, and the plurality of telescopic rod structures (8) and the steel springs (9) are evenly distributed between the connecting plate (7) and the bridge deck (3).

6. The bridge seismic isolation device according to claim 1, characterized in that: The interior of the hydraulic base (5) is a vacuum environment.

7. The bridge seismic isolation device according to claim 1, characterized in that: Enclosures (4) are fixedly connected to both sides of the bridge deck (3).

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