Anti-seismic bridge steel structure

Abstract

The utility model relates to bridge steel beam technical field provides an anti -seismic bridge steel structure, including bottom plate and roof, its characterized in that, the anti -seismic bridge steel structure still includes: inner frame, fixedly installed in the top of bottom plate, outer frame, fixedly installed in the bottom of roof, in the utility model, through setting up ball bearing in the both sides of guide piece, arc -shaped groove and guide groove inner spray polytetrafluoroethylene self -lubricating coating, make ball bearing roll in arc -shaped groove, because rolling friction compares sliding friction, friction coefficient reduces obviously, can reduce the loss of vibration energy in guide structure, make the relative expansion between inner frame and outer frame more smooth, thereby guarantee main buffer damping rod, vice buffer damping rod etc. Buffering component can respond vibration more quickly, improve the anti -seismic efficiency, the existence of ball bearing reduces the direct contact and wear and tear between guide piece and guide groove, and self -lubricating coating and micro -type oil storage cavity further reduce the wear and tear of ball bearing.

Description

Technical Field

[0001] This utility model relates to the field of bridge steel beam technology, and in particular to a seismic-resistant bridge steel structure. Background Technology

[0002] With societal development, steel structures, composed of steel materials, are one of the main types of building structures. Due to their light weight and ease of construction, they are widely used in house construction and bridge erection. Especially in the field of bridges, steel structures are often used as supports for the bridge deck, therefore, steel structures need to meet certain seismic resistance requirements.

[0003] In the prior art, such as Chinese Patent No. CN222771300U, a steel beam column is included. A base plate is provided on the top of the steel beam column, an inner frame is provided on the top of the base plate, an outer frame is fitted around the outer side of the inner frame, and a top plate is provided on the top of the outer frame. Multiple guide plates are distributed on the outer side of the inner frame, and multiple guide grooves are distributed on the inner side of the outer frame. This utility model provides stable support for the inner and outer frames through the base plate and top plate, respectively. Simultaneously, the inner and outer frames are telescopically connected, and the guide plates and guide grooves provide guidance. This facilitates the internal buffering and shock absorption support provided by the main buffer damping rod and main spring. Meanwhile, buffer springs are distributed on all four sides, and the rotational connection between the buffer springs and the rotating seat, along with auxiliary buffer damping rods and auxiliary springs, further provides buffering, shock absorption, and lateral support.

[0004] While the above-mentioned solutions offer advantages, they also have disadvantages. When the bridge steel structure is subjected to vibration, relative expansion and contraction occur between the inner and outer frames, and the guide plates slide within the guide grooves. Due to sliding friction, the friction between the guide plates and the guide grooves is significant, leading to substantial energy loss in the guiding structure. This results in the main buffer damping rod, secondary buffer damping rod, and buffer springs being unable to respond quickly and effectively to vibrations, reducing seismic efficiency. Long-term sliding friction causes gradual wear on the contact surfaces between the guide plates and the guide grooves. With increasing usage time, the fit precision between the guide plates and the guide grooves decreases, potentially leading to increased gaps. This not only affects the stability and accuracy of the relative movement between the inner and outer frames but may also cause the structure to sway or shift during vibrations, further reducing seismic performance. Furthermore, with the sliding connection method, the start and stop of the guide plates within the guide grooves are relatively slow, making it difficult to react quickly to sudden high-intensity vibrations and meet the requirements for rapid response during seismic events. Additionally, the stiffness of the buffer springs is fixed, preventing flexible adjustment of their performance under varying vibration intensities. For low-intensity daily vibrations (such as vibrations from passing vehicles), fixed-stiffness buffer sheets may be too rigid and unable to fully absorb micro-vibration energy, causing some vibration energy to be transferred to the main bridge structure. However, when encountering high-intensity vibrations such as earthquakes, they may not be stiff enough to provide sufficient support and cushioning, leading to excessive structural deformation or even damage. Buffer sheets with a single structure can only absorb and dissipate vibration energy through their own elastic deformation. For complex vibration situations (such as combinations of vibrations of different frequencies and directions), their cushioning effect is limited. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art where the guide plate slides in the guide groove. Due to the existence of sliding friction, the friction between the guide plate and the guide groove is relatively large, which leads to a lot of loss of vibration energy in the guide structure. This makes the main buffer damping rod, the secondary buffer damping rod, and the buffer spring and other buffer components unable to respond to vibration quickly and effectively, thus reducing the seismic resistance efficiency.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a seismic-resistant bridge steel structure comprising a bottom plate and a top plate, characterized in that the seismic-resistant bridge steel structure further comprises: The inner frame is fixedly installed on the top of the base plate; The outer frame is fixedly installed at the bottom of the top plate; Two guide plates are fixedly installed on both sides of the inner frame; Multiple ball bearings are rotatably mounted on both sides of the two guide plates; Guide grooves are formed on both sides of the inner cavity of the outer frame; Both of the guide plates are slidably engaged with the guide groove; Two arc-shaped grooves are formed on both sides of the two guide grooves; Among them, multiple of the ball bearings are rotatably engaged with the arc-shaped groove; The oil injection component is located on top of the two guide plates; Four rigid lateral supports are provided on the four sides of the bottom plate and the top plate.

[0007] In a preferred embodiment, the oiling component includes: A miniature oil reservoir is located at the top of the guide plate; Two capillary tubes are installed on both sides of the bottom of the miniature oil storage chamber; Two of the capillaries pass through both sides of the guide plate, and one end of each capillary is in contact with the surface of the arc-shaped groove.

[0008] The technical effect of adopting the above-mentioned further solution is that, by utilizing the capillary siphon effect, the lubricating oil in the micro oil storage cavity can be continuously and evenly delivered to the surface of the arc groove, lubricating the contact part between the ball and the arc groove, reducing friction, reducing wear, and ensuring the long-term stable operation of the guide structure.

[0009] In a preferred embodiment, the oiling component further includes: An oil inlet pipe is installed on top of the guide plate; The oil inlet pipe is connected to the top of the inner cavity of the micro oil storage chamber; A valve is installed on the oil inlet pipe.

[0010] The technical advantages of adopting the above-mentioned further solution are: lubricating oil can be conveniently replenished into the miniature oil reservoir through the oil inlet pipe, and the valve can control the opening and closing of the oil inlet, which is convenient to operate according to the actual lubrication needs, ensuring that the oil reservoir always has enough lubricating oil and maintaining the lubrication effect.

[0011] In a preferred embodiment, the stiffness lateral support includes: Two connecting seats are respectively located at the bottom and top of the base plate and the top plate; Two buffer springs are respectively hinged to one side of the two connecting seats; A second buffer spring is disposed between the two first buffer springs; The openings are located at the top and bottom of the second buffer spring. The top and bottom of the second buffer spring are hinged to the two first buffer springs.

[0012] The technical effect of adopting the above-mentioned further solution is that by hingedly combining two buffer springs, buffer spring one and buffer spring two, a multi-segment buffer structure is formed. When subjected to lateral force, each spring can deform in coordination, effectively disperse and absorb vibration energy, improve the buffer performance of lateral support, and enhance the seismic resistance of the structure.

[0013] As a preferred embodiment, the seismic-resistant bridge steel structure further includes: Multiple rotating seats are installed in four groups at the bottom and top of the base plate and top plate, respectively. Multiple rotating rods are rotatably mounted between the two rotating seats; Among them, multiple rotating rods are bolted to the connecting seat.

[0014] The technical effect of adopting the above-mentioned further solution is that the rotational cooperation between the rotating rod and the rotating seat, as well as the bolt connection with the connecting seat, allows the installation angle of the connecting seat to be flexibly adjusted. This enables the support angle of the stiffness lateral support to be adjusted according to different seismic requirements, thereby improving the structure's adaptability to different vibration directions and intensities.

[0015] As a preferred embodiment, the seismic-resistant bridge steel structure further includes: A polytetrafluoroethylene self-lubricating coating is sprayed onto the surface of the guide groove and the two arc-shaped grooves.

[0016] The technical effect of adopting the above-mentioned further solution is that polytetrafluoroethylene has an extremely low coefficient of friction and good self-lubricating properties. When sprayed on the surface of the guide groove and the arc groove, it can further reduce the friction between the ball and the groove, reduce wear, and at the same time play a certain role in corrosion prevention and extend the service life of the guide structure.

[0017] As a preferred embodiment, the seismic-resistant bridge steel structure further includes: Four secondary buffer damping rods are respectively disposed between the two connecting seats; The top end of the secondary buffer damping rod is connected to the top connecting seat, and the bottom end of the secondary buffer damping rod is connected to the bottom connecting seat.

[0018] The technical effect of adopting the above-mentioned further solution is that the auxiliary buffer damping rod, in combination with the stiffness lateral support, can provide additional buffering and damping in the lateral direction, further absorb and dissipate vibration energy, improve the seismic performance of the bridge steel structure under lateral vibration, and make the seismic resistance effect more comprehensive.

[0019] As a preferred embodiment, the seismic-resistant bridge steel structure further includes: The main buffer damping rod is disposed between the bottom plate and the top plate; The top end of the main buffer damping rod is connected to the bottom wall of the top plate, and the bottom end of the main buffer damping rod is connected to the top wall of the bottom plate. The main buffer damping rod is located in the middle of the inner and outer frames.

[0020] The technical effect of adopting the above-mentioned further solution is that the main buffer damping rod is located in the middle of the structure and can provide the main buffering and damping effect in the vertical direction. When the bridge is subjected to vertical vibration, it can effectively absorb and consume energy, limit the relative vertical displacement between the inner frame and the outer frame, ensure the seismic stability of the structure in the vertical direction, and form a comprehensive seismic protection in combination with other buffer components.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. This utility model, by setting ball bearings on both sides of the guide plate and spraying a polytetrafluoroethylene self-lubricating coating inside the arc-shaped groove and the guide groove, allows the ball bearings to roll within the arc-shaped groove. Because rolling friction has a significantly lower coefficient of friction than sliding friction, it can reduce the loss of vibration energy in the guide structure, making the relative expansion and contraction between the inner and outer frames smoother. This ensures that the main buffer damping rod, secondary buffer damping rod, and other buffer components can respond to vibration more quickly, improving seismic efficiency. The presence of the ball bearings reduces direct contact and wear between the guide plate and the guide groove. At the same time, the self-lubricating coating and the micro oil reservoir further reduce the wear of the ball bearings, extending the service life of the guide structure and reducing maintenance frequency and cost. The rolling guide structure allows the inner and outer frames to generate relative movement more quickly when vibration occurs, especially in the case of sudden vibration, enabling faster start and stop, better meeting the requirements for rapid response during seismic resistance, and thus more effectively protecting the bridge steel structure. 2. This utility model, by setting two buffer springs, buffer spring one and buffer spring two, adopts a multi-segment variable stiffness spring with a combination of steel with different elasticities. Under low-intensity vibration, the low-elasticity steel segments at both ends mainly rely on deformation to buffer and fully absorb micro-vibration energy. Under high-intensity vibration, the high-elasticity steel segment in the middle participates in deformation, and the overall stiffness is improved, which can provide stronger support and buffering, effectively avoiding the problem of being too stiff in small vibrations and too soft in large vibrations. It improves the adaptability to vibrations of different intensities. The multi-segment structure enables the buffer spring to better cope with complex vibration conditions, enhances the adaptability of the structure to different use environments and working conditions, and enables the bridge steel structure to better play its seismic resistance role under various conditions. Attached Figure Description

[0022] Figure 1 This is a perspective view of an embodiment of this application; Figure 2 This is a perspective cross-sectional view of an embodiment of this application; Figure 3 This is a perspective cross-sectional view of the arc-shaped groove in an embodiment of this application; Figure 4 This is an embodiment of the present application. Figure 3 Enlarged view of point A; Figure 5 This is a three-dimensional exploded view of buffer spring 1 and buffer spring 2 in the embodiments of this application.

[0023] Legend: 1. Base plate; 2. Inner frame; 3. Outer frame; 4. Top plate; 5. Buffer spring one; 6. Buffer spring two; 7. Opening; 8. Guide plate; 9. Ball bearing; 10. Secondary buffer damping rod; 11. Main buffer damping rod; 12. Guide groove; 13. Arc groove; 14. Capillary tube; 15. Miniature oil reservoir; 16. Oil inlet pipe; 17. Valve; 18. Rotating seat; 19. Rotating rod; 20. Connecting seat; 21. PTFE self-lubricating coating. Detailed Implementation

[0024] 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. Example

[0025] Please see Figures 1-5 This embodiment provides a seismic-resistant bridge steel structure, the specific concept of which is as follows: An earthquake-resistant bridge steel structure includes a bottom plate 1 and a top plate 4. The earthquake-resistant bridge steel structure also includes an inner frame 2, an outer frame 3, two guide plates 8, multiple ball bearings 9, a guide groove 12, two arc grooves 13, and an oil injection component.

[0026] The inner frame 2 is fixedly installed on the top of the base plate 1.

[0027] The outer frame 3 is fixedly installed at the bottom of the top plate 4.

[0028] The two guide plates 8 are fixedly installed on both sides of the inner frame 2.

[0029] Among them, multiple rolling balls 9 that play a rolling role are rotatably installed on both sides of two guide plates 8.

[0030] The guide grooves 12 are provided on both sides of the inner cavity of the outer frame 3.

[0031] In addition, both guide plates 8 are slidably engaged with the guide grooves 12.

[0032] The two arc-shaped grooves 13 are provided on both sides of the two guide grooves 12.

[0033] It should be noted that multiple balls 9 are rotatably engaged with the arc-shaped groove 13.

[0034] The oil injection component is located on top of the two guide plates 8.

[0035] As examples, in this embodiment, the oil filling component includes: a miniature oil reservoir 15, two capillary tubes 14, an oil inlet pipe 16, and a valve 17.

[0036] The miniature oil storage cavity 15 is located on the top of the guide plate 8.

[0037] The two capillary tubes 14 are installed on both sides of the bottom of the miniature oil storage chamber 15.

[0038] In addition, two capillaries 14 extend through both sides of the guide plate 8, and one end of the two capillaries 14 is in contact with the surface of the arc groove 13.

[0039] The oil inlet pipe 16 is installed on the top of the guide plate 8 and is connected to the top of the inner cavity of the micro oil storage chamber 15.

[0040] The valve 17 is installed on the oil inlet pipe 16.

[0041] In this embodiment, the balls 9 on both sides of the guide plate 8 roll in the arc-shaped grooves 13 on both sides of the guide groove 12. With the continuous oil supply from the oiling component, the micro oil storage cavity 15 at the top of the guide plate 8 delivers lubricating oil evenly to the surface of the arc-shaped groove 13 through the capillary tube 14, lubricating the contact area between the balls 9 and the groove in real time, guiding the relative displacement direction of the inner and outer frames 3, avoiding structural displacement, greatly reducing the coefficient of friction, reducing the loss of vibration energy during the guiding process, and providing a foundation for the rapid response of the subsequent buffer system. Example

[0042] Please see Figures 1-5 Based on Example 1, this example provides a seismic-resistant bridge steel structure, the specific concept of which is as follows: The earthquake-resistant bridge steel structure also includes: four stiffness lateral support members, multiple rotating seats 18, multiple rotating rods 19, polytetrafluoroethylene self-lubricating coating 21, four secondary buffer damping rods 10 and a main buffer damping rod 11.

[0043] The four rigid lateral support members are installed on the four sides of the bottom plate 1 and the top plate 4.

[0044] The multiple rotating seats 18 are divided into four groups and installed at the bottom and top of the base plate 1 and the top plate 4 respectively. The multiple rotating rods 19 are respectively rotatably installed between the two rotating seats 18, and all the rotating rods 19 are bolted to the connecting seat 20.

[0045] The polytetrafluoroethylene self-lubricating coating 21 is sprayed on the surface of the guide groove 12 and the two arc-shaped grooves 13.

[0046] Among them, the four secondary buffer damping rods 10 that play a buffering role are respectively set between the two connecting seats 20; In addition, the top end of the secondary buffer damping rod 10 is connected to the top connecting seat 20, and the bottom end of the secondary buffer damping rod 10 is connected to the bottom connecting seat 20.

[0047] Among them, the main buffer damping rod 11, which plays a buffering role, is set between the bottom plate 1 and the top plate 4.

[0048] It should be noted that the top end of the main buffer damping rod 11 is connected to the bottom wall of the top plate 4, and the bottom end of the main buffer damping rod 11 is connected to the top wall of the bottom plate 1. Furthermore, the main buffer damping rod 11 is located in the middle of the inner frame 2 and the outer frame 3.

[0049] As examples, in this embodiment, the stiffness lateral support includes:

[0050] The two connecting seats 20 are located at the bottom and top of the base plate 1 and the top plate 4, respectively.

[0051] The two buffer springs 5 ​​are respectively hinged to one side of the two connecting seats 20.

[0052] Among them, the second buffer spring 6 is set between the two first buffer springs 5.

[0053] The opening 7 is located at the top and bottom of the second buffer spring 6, and the top and bottom of the second buffer spring 6 are hinged to the two first buffer springs 5.

[0054] It should be noted that the two buffer springs 1-5 and buffer spring 2-6 adopt a three-section structure. Buffer spring 2-6 is made of high elastic steel, and the buffer springs 1-5 at both ends are made of low elastic steel. The thickness ratio of buffer spring 2-6 to the two buffer springs 1-5 is 2:1.

[0055] In this embodiment, the rigid lateral support members on all four sides and the secondary buffer damping rod 10 work together to cope with lateral vibration. The multi-segment buffer spring 5 and buffer spring 6 deform in coordination according to the vibration intensity to disperse and absorb lateral vibration energy. They respond in stages according to the vibration intensity, flexibly absorbing during low vibration and rigidly supporting during high vibration. The secondary buffer damping rod 10 further consumes lateral vibration energy. The rotating seat 18 and the rotating rod 19 cooperate to allow the angle of the connecting seat 20 to be adjusted by bolts, flexibly adapting to different vibration directions and intensities, and optimizing the lateral anti-vibration effect. At the same time, the polytetrafluoroethylene self-lubricating coating 21 sprayed on the surface of the guide groove 12 and the arc groove 13 greatly reduces the coefficient of friction.

[0056] Working principle: When the bridge is subjected to vibration (such as vibration from vehicle traffic or earthquake), the top plate 4 and the bottom plate 1 are displaced relative to each other due to external forces, causing the outer frame 3 and the inner frame 2 to begin relative movement. At this time, the guide plates 8 on both sides of the inner frame 2 slide along the guide grooves 12 in the inner cavity of the outer frame 3, while the balls 9 on both sides of the guide plates 8 roll in the arc grooves 13 on both sides of the guide grooves 12, forming a composite guiding mechanism of sliding and rolling. The polytetrafluoroethylene self-lubricating coating 21 sprayed on the surface of the guide grooves 12 and the arc grooves 13 greatly reduces the coefficient of friction. With the continuous oil supply from the oiling parts, the micro oil storage cavity 15 at the top of the guide plate 8 delivers lubricating oil evenly to the surface of the arc grooves 13 through the capillary tube 14, providing real-time lubrication to the contact parts between the balls 9 and the groove, ensuring that the relative movement of the inner and outer frames 3 is smooth. If the oil in the oil storage cavity is insufficient, the valve 17 can be opened through the oil inlet pipe 16 to replenish the lubricating oil and maintain a long-term lubrication effect.

[0057] As vibrations intensify, the main buffer damping rod 11, located in the middle of the inner and outer frame 3, becomes the core of vertical seismic resistance. When the top plate 4 and bottom plate 1 experience vertical displacement, the main buffer damping rod 11 absorbs energy through its own expansion and contraction deformation. Its internal damping medium (such as hydraulic oil) dissipates vibration kinetic energy through throttling, while limiting excessive vertical displacement of the inner and outer frame 3. The central design of the main buffer damping rod 11 ensures uniform transmission of vertical force, avoiding local overload of the structure. In conjunction with the guide system, it forms a guide-buffer linkage, initially reducing the intensity of vertical vibration. During low-intensity vibrations (such as vehicle traffic), the buffer springs 5 ​​made of low-elasticity steel at both ends deform preferentially, absorbing energy through elastic bending. During high-intensity vibrations (such as earthquakes), the middle section of the high-elasticity steel buffer spring 6 participates in deformation, improving the overall stiffness. The lateral force is dispersed through the coordinated bending of the three-section structure, avoiding overload of a single spring. The secondary buffer damping rod 10 between the connecting seats 20 extends and retracts synchronously. Its auxiliary spring and damping medium further dissipate the lateral vibration energy, forming a double buffer with the buffer spring. The cooperation between the rotating seat 18 and the rotating rod 19 allows the connecting seat 20 to adjust the angle through bolts. The support direction can be optimized according to the vibration direction (such as increasing the lateral support angle during strong lateral earthquakes), improving the lateral seismic resistance.

[0058] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0059] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A seismic-resistant bridge steel structure, comprising a bottom plate (1) and a top plate (4), characterized in that, The earthquake-resistant bridge steel structure also includes: The inner frame (2) is fixedly installed on the top of the base plate (1); The outer frame (3) is fixedly installed at the bottom of the top plate (4); Two guide plates (8) are fixedly installed on both sides of the inner frame (2); Multiple balls (9) are rotatably mounted on both sides of the two guide plates (8); Guide grooves (12) are provided on both sides of the inner cavity of the outer frame (3); Both of the guide pieces (8) are slidably fitted with the guide groove (12); Two arc-shaped grooves (13) are formed on both sides of the two guide grooves (12); Among them, multiple balls (9) are rotatably engaged with the arc-shaped groove (13); The oil injection component is located on top of the two guide plates (8); Four rigid lateral supports are provided on the four sides of the bottom plate (1) and the top plate (4).

2. The earthquake-resistant bridge steel structure according to claim 1, characterized in that, The oil injection component includes: A miniature oil storage cavity (15) is formed on the top of the guide plate (8); Two capillary tubes (14) are installed on both sides of the bottom of the micro oil storage chamber (15); Two capillaries (14) penetrate both sides of the guide plate (8), and one end of each capillary (14) is in contact with the surface of the arc groove (13).

3. The earthquake-resistant bridge steel structure according to claim 2, characterized in that, The oil injection component also includes: An oil inlet pipe (16) is installed on the top of the guide plate (8); The oil inlet pipe (16) is connected to the top of the inner cavity of the micro oil storage chamber (15); A valve (17) is installed on the oil inlet pipe (16).

4. The earthquake-resistant bridge steel structure according to claim 1, characterized in that, The stiffness lateral support includes: Two connecting seats (20) are provided at the bottom and top of the bottom plate (1) and the top plate (4); Two buffer springs (5) are respectively hinged to one side of the two connecting seats (20); Buffer spring 2 (6) is disposed between the two buffer springs 1 (5); An opening (7) is formed at the top and bottom of the second buffer spring (6); The top and bottom of the second buffer spring (6) are hinged to the two first buffer springs (5).

5. A seismic-resistant bridge steel structure according to claim 4, characterized in that, The earthquake-resistant bridge steel structure also includes: Multiple rotating seats (18) are installed in four groups at the bottom and top of the base plate (1) and the top plate (4); Multiple rotating rods (19) are rotatably mounted between the two rotating seats (18); Among them, multiple rotating rods (19) are bolted to the connecting seat (20).

6. A seismic-resistant bridge steel structure according to claim 1, characterized in that, The earthquake-resistant bridge steel structure also includes: A polytetrafluoroethylene self-lubricating coating (21) is sprayed onto the surface of the guide groove (12) and the two arc grooves (13).

7. A seismic-resistant bridge steel structure according to claim 4, characterized in that, The earthquake-resistant bridge steel structure also includes: Four secondary buffer damping rods (10) are respectively disposed between the two connecting seats (20); The top end of the secondary buffer damping rod (10) is connected to the top connecting seat (20), and the bottom end of the secondary buffer damping rod (10) is connected to the bottom connecting seat (20).

8. A seismic-resistant bridge steel structure according to claim 1, characterized in that, The earthquake-resistant bridge steel structure also includes: The main buffer damping rod (11) is disposed between the bottom plate (1) and the top plate (4); The top end of the main buffer damping rod (11) is connected to the bottom wall of the top plate (4), the bottom end of the main buffer damping rod (11) is connected to the top wall of the bottom plate (1), and the main buffer damping rod (11) is located in the middle of the inner frame (2) and the outer frame (3).

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