Bridge anti-seismic support

Abstract

The utility model aims to provide a bridge anti-seismic support which can play an effective buffering and damping role in transverse vibration of different amplitudes and frequencies generated by a bridge floor relative to a support column. The bridge anti-seismic support comprises a top connecting seat used for being connected with a bridge floor and a bottom connecting seat used for being connected with a bridge pier supporting column. A vertical vibration reduction structure used for achieving the vibration reduction and buffering effects in the vertical direction and a horizontal vibration reduction structure used for achieving the vibration reduction and buffering effects in the horizontal direction are formed between the top connecting base and the bottom connecting base.

Description

Technical Field

[0001] The utility model relates to the field of bridge building earthquake-resistant structure design, in particular to an earthquake-resistant bridge support. Background Art

[0002] A bridge bearing is a device erected on a pier, with the top surface supporting the superstructure of the bridge. Its function is to fix the superstructure to the pier, bear various forces acting on the superstructure, and reliably transmit them to the pier. The bridge bearing here needs to cope with the high-frequency, small-amplitude vibrations caused by the bumps and bounces of various large and small vehicles passing over it. In addition, it should also be considered that in some areas with high earthquake incidence, vibration waves of varying strengths often occur. Therefore, it is necessary to design some buffering and shock-absorbing structures between the pier pillars and the bridge deck to reduce the impact of ground vibrations on the main body of the bridge, and to effectively protect the bridge body when the above situation occurs. At present, there are some bridge bearings in the industry that can play an effective earthquake-resistant role in the above-mentioned working scenarios.

[0003] For example, a bridge seismic bearing disclosed in the Chinese utility model patent application document with application number CN202320240242.2 includes a device base, a bearing body is arranged on the top of the device base, a bottom limiting groove is arranged inside the bearing body, a buffer rubber pad is installed in the middle of the bottom limiting groove, a top fixing groove is arranged on the top of the buffer rubber pad, a bottom connecting column is arranged on the top of the top fixing groove, an upper connecting column is installed on the top of the bottom connecting column, an upper body is arranged on the top of the upper connecting column, a top mounting seat is arranged on the top of the upper body, and a spring tension shaft is installed inside the bearing body. The bridge seismic bearing provided in the utility model scheme can provide displacement space for the device components when the device is affected by bridge vibration and deflects by using the design of the bite limiting groove in combination with the bottom connecting column and the upper connecting column, and can also limit them by tension by using the spring tension shaft in combination with the connector to connect the bearing body and the upper body. Of course, some structural design schemes for bridge seismic bearings are also given in the Chinese utility model patent application document with application number CN202110031521.3 and the Chinese invention patent application document with application number CN202010887883.8.

[0004] However, in the technical solution given in the utility model patent with application number CN202320240242.2, it can be clearly found that the main vibration type that its structure copes with is the up and down jumping action of the bridge deck in the vertical direction relative to the support body located at the bottom. When the ground or rock layer that fixes the base of the device vibrates laterally, the lower side of the structure can only avoid damage to the rigid structural components through the staggered translational movement of the upper and lower parts of the bite limit groove structure. Obviously, in the actual working scene, when such a structure has a relatively light amplitude but a high frequency of lateral vibration, if the fluctuation degree of the bite limit groove is designed to be large, such a scene is not enough to allow the bite limit groove to move alternately, resulting in poor buffering effect on vibration, and it is still easy to damage other rigid connection structures; and if the fluctuation degree of the bite limit groove is designed to be small, it is easy to cause serious wear at this position and then fail.

[0005] In view of the above problems, the utility model provides a bridge seismic bearing which can effectively buffer and reduce vibrations of different amplitudes and frequencies generated by the bridge deck relative to the support column in the lateral direction. Utility Model Content

[0006] The utility model provides a bridge anti-seismic support which can effectively buffer and reduce vibrations of different amplitudes and frequencies generated by the bridge deck relative to a support column in the transverse direction.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] A bridge seismic bearing includes a top connecting seat for connecting to a bridge deck and a bottom connecting seat for connecting to a pier support, wherein a vertical vibration reduction structure for reducing vibration and buffering in the vertical direction and a horizontal vibration reduction structure for reducing vibration and buffering in the horizontal direction are formed between the top connecting seat and the bottom connecting seat.

[0009] As a preferred embodiment of the present invention, a transition connection block is arranged between the top connection seat and the bottom connection seat, the vertical vibration damping structure includes an elastic tension shaft for providing a contraction tension in the vertical direction and an elastic buffer pad for supporting in the vertical direction, the upper and lower ends of the elastic tension shaft are respectively fixedly connected to the bottom of the transition connection block and the bottom connection seat; the horizontal vibration damping structure includes a transverse sliding cavity opened in the transition connection block, and a guide sliding connection block fixedly connected to the bottom end of the top connection seat, the top end of the transverse sliding cavity is provided with an opening for the guide sliding connection block to enter the interior of the transverse sliding cavity, and an elastic buffer connection piece is connected between the side wall surface of the guide sliding connection block and the lateral inner wall surface of the transverse sliding cavity.

[0010] As a preferred embodiment of the present invention, a plurality of elastic buffer connecting members are arranged around the guide sliding connecting block and connected between the outer peripheral wall surface of the guide sliding connecting block and the inner wall surface of the transverse sliding cavity.

[0011] As a preferred embodiment of the present invention, a cushion layer of drag reducing material is provided between the bottom surface of the guide sliding connection block and the lateral sliding cavity.

[0012] As a preferred embodiment of the present invention, the upper and lower ends of the elastic tension shaft are respectively hinged to the transition connection block and the bottom connection seat.

[0013] As a preferred embodiment of the present invention, the elastic tension shaft includes a spring component and a telescopic adjustment mechanism for changing and adjusting the stretching degree of the spring component.

[0014] As a preferred embodiment of the present invention, the telescopic adjustment mechanism includes a hollow sleeve column, a connecting rod inserted into the sleeve column, and a threaded structure is formed between the connecting rod and the sleeve column, so that the connecting rod can adjust the overall height of the two connected components by rotating and telescoping relative to the sleeve column.

[0015] As a preferred embodiment of the present invention, a wavy toothed abutment structure is provided on the bottom connecting seat, and the wavy toothed abutment structure is located below the vertical vibration reduction structure and the horizontal vibration reduction structure.

[0016] In summary, the utility model can achieve the following multiple beneficial effects:

[0017] The bridge seismic bearing provided in the scheme of the utility model is based on the existing structure that only realizes the vibration reduction effect in the vertical direction, and provides the top connecting seat connected to the bridge deck with a margin space for translational vibration in the horizontal direction relative to the bottom connecting seat connected to the pier support. At the same time, when the structure works in conjunction with the wavy toothed abutment structure, a double-layer vibration-absorbing structure is formed, which can achieve adaptive buffering and vibration reduction treatment for vibrations with small amplitude but high frequency in the horizontal direction, and prevent this type of vibration from causing the connection components to loosen and fail. The other part of the wavy toothed abutment structure can alleviate the impact effect through the relative movement of the upper and lower side components of the interface when a strong and large vibration occurs in an instant, thereby avoiding the fracture and damage of the rigid link components, so that the bridge body using the bridge seismic bearing of this structure has higher adaptability and stability.

[0018] The bridge anti-seismic bearing provided in the solution of the utility model is provided with a telescopic adjustment mechanism in the elastic tension shaft for providing a contraction force between the upper and lower connecting seats, so as to change the length of the spring component that plays a pulling and vibration reduction role in the work. The mechanism can adaptively adjust the magnitude of the rebound force when the rebound performance of the component deteriorates due to metal fatigue and other reasons after a certain period of working use, thereby improving the balance and stability of the bridge anti-seismic bearing during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the internal structure layout of the bridge seismic bearing;

[0020] Figure 2 It is a structural schematic diagram showing that a plurality of elastic buffer connecting members are arranged on the periphery of the guide sliding connecting block from a transverse cross-sectional perspective;

[0021] Figure 3 It is a partially enlarged schematic diagram of a vertical vibration reduction structure with a telescopic adjustment mechanism;

[0022] Figure 4 It is a partial enlarged schematic diagram of the horizontal vibration reduction structure.

[0023] In the figure:

[0024] 1——Top connection seat;

[0025] 2——Bottom connecting seat;

[0026] 3——vertical vibration reduction structure, 301——elastic tension shaft, 302——elastic buffer pad, 303——telescopic adjustment mechanism, 3031——sleeve column, 3032——connecting rod, 3033——threaded structure;

[0027] 4——horizontal vibration reduction structure, 401——lateral sliding cavity, 402——guiding sliding connection block, 403——elastic buffer connection piece, 404——drag reduction material cushion layer;

[0028] 5——Transition connection block;

[0029] 6——Wavy toothed abutment structure. DETAILED DESCRIPTION

[0030] The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0031] This solution is achieved through the following technical means:

[0032] Embodiment: In this embodiment, a seismic bearing for a bridge is provided, which includes two main parts, a top connecting seat 1 for connecting to a bridge deck, and a bottom connecting seat 2 for connecting to a pier support. A vertical vibration reduction structure 3 for reducing vibration and buffering in the vertical direction and a horizontal vibration reduction structure 4 for reducing vibration and buffering in the horizontal direction are formed between the top connecting seat 1 and the bottom connecting seat 2.

[0033] The vertical vibration reduction structure 3 includes an elastic tension shaft 301 for providing contraction tension in the vertical direction and an elastic buffer pad 302 for supporting in the vertical direction. The upper and lower ends of the elastic tension shaft 301 are fixedly connected to the bottom of the transition connection block 5 and the bottom connection seat 2 respectively. Specifically, the elastic buffer pad 302 is made of high-strength rubber material, and can play an effective buffering role for the vibration here by its own compression and contraction deformation when the bridge deck load increases instantly or the bottom connection seat 2 partially transmits the vibration amount in the vertical direction of the ground. Of course, there is also a working state where the bridge deck load decreases instantly or the bottom connection seat 2 partially transmits the vibration amount of the ground vertically downward. At this time, the bridge deck jumps upward relative to the base and has a tendency to separate from each other, so it is necessary to use a corresponding structure to pull the top connection seat 1 and the local bridge deck downward. Specifically, in order to achieve this effect, in the vertical vibration reduction structure 3, an elastic tension shaft 301 connected between the transition connection block 5 and the bottom connection seat 2 can be added on the outside of the transition connection block 5. The structure of the elastic tension shaft 301 can refer to a bridge seismic bearing scheme disclosed in the Chinese utility model patent application document with application number CN202320240242.2.

[0034] In the present application, the structure similar to that of the solution is further optimized and improved, that is, the upper and lower ends of the elastic tension shaft 301 are respectively connected and fixed to the transition connection block 5 and the bottom connection seat 2 in a hinged manner. At this time, a certain staggered offset is generated between the top connection seat 1 and the bottom connection seat 2, which can still ensure that the spring component that plays a contraction and tensioning role in the elastic tension shaft 301 is in a state parallel to the tension direction at its two ends, so that the force on the spring component is more uniform, thereby effectively improving its durability.

[0035] Furthermore, considering that after a certain period of working, the spring components in each elastic tension shaft 301 are prone to uneven metal fatigue, which in turn leads to uneven elastic reset force of each spring component. Therefore, in the solution given in the present application, a telescopic adjustment mechanism 303 is also added to the elastic tension shaft 301. Specifically, the telescopic adjustment mechanism 303 can be referred to in the attached manual. Figure 4 The structure provided includes a hollow sleeve column 3031, a connecting rod 3032 inserted into the sleeve column 3031, and a threaded structure 3033 formed between the connecting rod 3032 and the sleeve column 3031, so that the connecting rod 3032 can adjust the overall height of the two connected components by rotating and telescoping relative to the sleeve column 3031, thereby changing the contraction and pulling force of the adjustment spring component on the top connecting seat 1 and the bottom connecting seat 2.

[0036] For the aforementioned horizontal vibration reduction structure 4, specifically, it is necessary to set a transition connection block 5 between the top connection seat 1 and the bottom connection seat 2, the transition connection block 5 is open from top to bottom, and a flat rectangular transverse sliding cavity 401 is formed inside it. A guide sliding connection block 402 is connected to the bottom of the top connection seat 1, and the guide sliding connection block 402 can pass through the top opening of the transition connection block 5 and enter the inside of the transverse sliding cavity 401. At the same time, an elastic buffer connection member 403 is connected between the side wall surface of the guide sliding connection block 402 and the lateral inner wall surface of the transverse sliding cavity 401, for example, a pad made of spring or rubber material can be selected as the elastic buffer connection member 403. When the ground on which the bottom connection seat 2 is fixedly installed vibrates laterally, the bottom connection seat 2 will vibrate laterally relative to the top connection seat 1. Correspondingly, the guide sliding connection block 402 located in the transverse sliding cavity 401 will also have a corresponding offset and shaking, and at this time the elastic buffer component can effectively buffer the vibration. In order to reduce the wear of the bottom surface of the guide sliding connection block 402 when it deviates and vibrates in the horizontal direction inside the lateral sliding cavity 401, a drag reduction material cushion layer 404 can be provided between the bottom surface of the guide sliding connection block 402 and the lateral sliding cavity 401. The drag reduction material cushion layer 404 here can be paraffin or a grease with a high viscosity.

[0037] Furthermore, a wavy toothed abutment structure 6 is provided on the bottom connecting seat 2, and the wavy toothed abutment structure 6 is located below the vertical vibration reduction structure 3 and the horizontal vibration reduction structure 4. The function of this structure is to form a double-layer vibration-damping structure in cooperation with the horizontal vibration reduction structure 4 above. At this time, the seismic bearing of the bridge can utilize the horizontal vibration reduction structure 4 to achieve adaptive buffering and vibration reduction treatment for vibrations with small amplitude but high frequency in the horizontal direction, thereby preventing this type of vibration from causing the connection components to loosen and fail. At the same time, the wavy toothed abutment structure 6 can be utilized to alleviate the strong impact effect through the relative movement of the upper and lower side components of the interface when a strong and large amplitude vibration occurs instantly, thereby avoiding the fracture and damage of the rigid link components, so that the bridge body using the seismic bearing of the bridge with this structure has higher adaptive stability.

[0038] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A bridge seismic bearing, characterized in that: The invention comprises a top connection seat (1) for connecting to a bridge deck, and a bottom connection seat (2) for connecting to a bridge pier support, wherein a vertical vibration reduction structure (3) for performing a vibration reduction and buffering function in a vertical direction and a horizontal vibration reduction structure (4) for performing a vibration reduction and buffering function in a horizontal direction are formed between the top connection seat (1) and the bottom connection seat (2); a transition connection block (5) is arranged between the top connection seat (1) and the bottom connection seat (2), wherein the vertical vibration reduction structure (3) comprises an elastic tension shaft (301) for providing a contraction tension force in a vertical direction and an elastic buffer pad (302) for performing a supporting function in a vertical direction, wherein the elastic The upper and lower ends of the tension axis (301) are fixedly connected to the bottom of the transition connection block (5) and the bottom connection seat (2) respectively; the horizontal vibration reduction structure (4) includes a transverse sliding cavity (401) opened in the transition connection block (5), and a guide sliding connection block (402) fixedly connected to the bottom end of the top connection seat (1), the top of the transverse sliding cavity (401) is provided with an opening for the guide sliding connection block (402) to enter the interior of the transverse sliding cavity (401), and an elastic buffer connection piece (403) is connected between the side wall surface of the guide sliding connection block (402) and the lateral inner wall surface of the transverse sliding cavity (401).

2. The bridge seismic bearing according to claim 1, characterized in that: Surrounding the guide sliding connection block (402), a plurality of elastic buffer connection pieces (403) are provided between the outer peripheral wall surface of the guide sliding connection block (402) and the inner wall surface of the transverse sliding cavity (401).

3. The bridge seismic bearing according to claim 1, characterized in that: A drag reduction material cushion layer (404) is provided between the bottom surface of the guide sliding connection block (402) and the transverse sliding cavity (401).

4. The bridge seismic bearing according to claim 1, characterized in that: The upper and lower ends of the elastic tension shaft (301) are respectively hinged to the transition connection block (5) and the bottom connection seat (2).

5. The bridge seismic bearing according to claim 1, characterized in that: The elastic tension shaft (301) includes a spring component and a telescopic adjustment mechanism (303) for changing and adjusting the stretching degree of the spring component.

6. The bridge seismic bearing according to claim 5, characterized in that: The telescopic adjustment mechanism (303) comprises a hollow sleeve column (3031), a connecting rod (3032) inserted into the sleeve column (3031), and a threaded structure (3033) is formed between the connecting rod (3032) and the sleeve column (3031), so that the connecting rod (3032) can adjust the overall height of the two connected components by rotating and telescoping relative to the sleeve column (3031).

7. The bridge seismic bearing according to claim 1, characterized in that: A wavy toothed abutment structure (6) is provided on the bottom connection seat (2), and the wavy toothed abutment structure (6) is located below the vertical vibration reduction structure (3) and the horizontal vibration reduction structure (4).

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