Bridge damping and energy consumption device
By installing viscous dampers and friction dampers between the main girder and the tie beam of the bridge, a dual damping mechanism is formed, which solves the problems of insufficient buffering effect and energy dissipation of existing bridge damping devices, and achieves good damping effect of the bridge under vibration of different frequencies and amplitudes, thereby improving the seismic performance and safety of the bridge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN CCCC TEST & REINFORCEMENT ENG CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-05-12
AI Technical Summary
现有桥梁减震装置在主梁和挡块之间的缓冲作用和耗能较弱，容易导致挡块开裂和桥梁安全隐患，尤其在地震作用下存在落梁风险。
在主梁和系梁之间设置粘滞阻尼器和摩擦阻尼器，形成双重减震耗能机制，通过粘滞阻尼器的剪切流动和摩擦阻尼器的摩擦力吸收和耗散桥梁横向振动能量，避免主梁与系梁直接碰撞。
It effectively absorbs and dissipates the lateral vibration energy of bridges, improves the bridge's shock absorption capacity, extends its service life, ensures driving safety, adapts to various harsh environments, and significantly enhances seismic performance and safety.
Smart Images
Figure CN224227637U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge seismic resistance and vibration reduction, specifically to a bridge vibration reduction and energy dissipation device. Background Technology
[0002] In my country, most small- and medium-span continuous beam bridges use plate rubber bearings. For these bridges, the bearings undergo significant displacement under seismic loads. To prevent lateral beam collapse, seismic blocks are typically installed at both ends of the piers and cap beams. While these blocks reduce the probability of beam collapse, improper installation can lead to collisions with the main beam, causing damage to the main beam itself and significantly increasing the internal forces in the substructure. In recent years, earthquakes have become increasingly frequent, and with rising population density, their adverse consequences are becoming more severe. This is particularly true for bridges, where beam collapse, displacement, and continuous deck damage during earthquakes have extremely serious consequences, posing a direct threat to vehicle safety.
[0003] Chinese patent document (publication number: CN219174988U) discloses a bridge damping block structure to prevent lateral beam collapse, including a steel block, a damping plate, and a bridge bearing. The top of the steel block is connected to the box girder of the bridge, and the damping plate is fixed to the lower side of the steel block. The bridge bearing includes an upper bearing pad, a bearing body, and a lower bearing pad stone. The damping plate corresponds to the lower bearing pad stone. This utility model has good anti-vibration and seismic isolation effects and can prevent the bridge beam from collapsing under seismic forces.
[0004] In the existing technology, rubber pads are installed between the main beam and the stop block. However, the buffering effect and energy dissipation of the rubber pads are weak. When the main beam undergoes lateral displacement, the impact force is large, which can easily cause the stop block on one side to crack and shear failure, posing a safety hazard to the bridge. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a bridge vibration reduction and energy dissipation device. By installing viscous dampers and friction dampers between the main beam and the tie beam, the device reduces the force of lateral displacement of the main beam, dissipates earthquake energy, and prevents direct collision between the bottom stop block of the main beam and the wedge block of the tie beam, thus ensuring bridge safety.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A bridge vibration damping and energy dissipation device includes columns, tie beams, supports, and a main beam. Two columns are fixedly connected to both ends of the tie beam. Supports are installed on the top of the columns, and the main beam is installed on the top of the supports. Two beam bottom blocks are symmetrically installed below the main beam. Tie beam wedges are symmetrically installed at both ends of the top of the tie beam, with the beam bottom blocks located between the two tie beam wedges. A viscous damper is disposed between the tie beam wedge and the adjacent beam bottom block. A friction damper is disposed outside the viscous damper. The device includes an elastic unit, an upper driven plate, and a lower driven plate. The upper driven plate is installed at the bottom of the main beam via the elastic unit, and the lower driven plate is installed at the top of the tie beam via the elastic unit. A guide rib is provided on the outer periphery of the viscous damper, and guide grooves are provided on the end faces of the upper and lower driven plates near the viscous damper. The guide grooves are adapted to the guide ribs. When the main beam and columns are subjected to wind loads or seismic forces, the viscous damper or friction damper absorbs or dissipates the lateral vibration energy of the bridge.
[0008] Preferably, the viscous damper includes a cylinder liner and a piston rod. One end of the cylinder liner is connected to the tie beam wedge, and one end of the piston rod is connected to the bottom stop of the beam. The other end of the piston rod is installed inside the cylinder liner via a piston. The cylinder liner contains a damping medium, and the piston has a medium flow hole. Guide ridges are provided on the outer periphery of both the cylinder liner and the piston rod.
[0009] Preferably, the upper driven plate includes a first upper driven plate and a second upper driven plate, and the lower driven plate includes a first lower driven plate and a second lower driven plate; the top of the first upper driven plate is fixedly installed on the bottom of the main beam by an elastic unit, and the bottom of the first lower driven plate is fixedly installed on the top of the tie beam by an elastic unit; the guide grooves on the first upper driven plate and the first lower driven plate are adapted to the first guide ridge on the outer periphery of the cylinder liner; the top of the second upper driven plate is fixedly installed on the bottom of the main beam by an elastic unit, and the bottom of the second lower driven plate is fixedly installed on the top of the tie beam by an elastic unit; the guide grooves on the second upper driven plate and the second lower driven plate are adapted to the second guide ridge on the outer periphery of the piston rod.
[0010] Preferably, a pushing protrusion is provided in the middle of the guide ridge, and multiple pushing inclined surfaces are provided on both sides of the pushing protrusion; a pushing groove is provided in the middle of the guide groove, and multiple pushing inclined grooves are provided on both sides of the pushing groove; the pushing protrusion is adapted to the pushing groove, and the pushing inclined surface is adapted to the pushing inclined groove.
[0011] Preferably, the cylinder liner is connected to the tie beam wedge via a hinged seat, and the piston rod is connected to the bottom stop block of the beam via a hinged seat.
[0012] Preferably, the damping medium inside the cylinder liner is silicone oil, and the number of medium flow holes is 3-6, which are evenly distributed in a ring.
[0013] Preferably, the inclination angle of the push-up inclined surface is 30-55 degrees, and the inclination angle of the push-up inclined groove is adapted to the push-up inclined surface.
[0014] Preferably, the contact surfaces of the first upper driven plate, the second upper driven plate, the first lower driven plate, and the second lower driven plate are all provided with a wear-resistant layer, and the wear-resistant layer is made of polytetrafluoroethylene material.
[0015] Preferably, the elastic unit includes a fixed plate and several springs, one end of the spring is fixedly connected to the fixed plate, and the other end of the spring is fixedly connected to the upper driven plate or the lower driven plate.
[0016] Preferably, the spring is a helical compression spring, and 4-8 springs are evenly arranged on each fixed plate.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] 1. This utility model forms a dual vibration reduction and energy dissipation mechanism by setting viscous dampers and friction dampers between the main beam and the tie beam. It can maintain a good vibration reduction effect under vibrations of different frequencies and amplitudes, effectively absorbing and dissipating the lateral vibration energy of the bridge. Its structure is simple, inexpensive, easy to construct, and easy to replace later. It can significantly improve the overall vibration reduction capacity of the bridge, effectively extend the service life of the bridge, and ensure the safety of people and vehicles.
[0019] 2. The viscous damper of this utility model uses silicone oil as the damping medium, and generates a stable viscous damping force through uniformly distributed medium flow holes; the friction damper adopts a double-layer driven plate structure to increase the friction contact area, and the elastic unit adopts a helical compression spring evenly arranged to ensure uniform pressure distribution and provide pre-pressure redundancy; the multiple guiding structure (guide ridge, guide groove, push protrusion, push slope) ensures smooth movement, and the tilt angle design of the push slope can convert horizontal vibration into vertical thrust, avoiding local stress concentration.
[0020] 3. This utility model adopts a hinged seat connection method, which is convenient for installation and adjustment, can compensate for construction errors, and has a certain degree of rotational freedom between components to adapt to angle changes during vibration, making it easy to disassemble, assemble, maintain and repair. The overall design forms a dual shock absorption mechanism, which has strong adaptability and reliability, is suitable for use in various harsh environments, effectively avoids direct collision between the main beam and the tie beam, and significantly improves the seismic performance, safety and service life of the bridge structure. Attached Figure Description
[0021] Figure 1 This is a three-dimensional schematic diagram of the overall installation structure of the device of this utility model;
[0022] Figure 2This is a three-dimensional schematic diagram of the installation structure of the friction damper of this utility model;
[0023] Figure 3 This is a three-dimensional schematic diagram of the disassembled structure of the friction damper of this utility model;
[0024] In the diagram: Main beam-11; Column-12; Tie beam-13; Support-14; Tie beam wedge-15; Beam bottom stop-16; Cylinder liner-17; Piston rod-18; First guide ridge-19; Second guide ridge-20; Hinge seat-21; First upper driven plate-22; First lower driven plate-23; Second upper driven plate-24; Second lower driven plate-25; Fixed plate-26; Spring-27; Pushing groove-28; Pushing slope-29; Pushing groove-30; Pushing protrusion-31. Detailed Implementation
[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
[0026] Contents not described in detail in this specification are existing technologies known to those skilled in the art. In the description of this utility model, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. Furthermore, terms such as "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0027] Figures 1-3As shown, a bridge vibration damping and energy dissipation device includes columns 12, tie beams 13, supports 14, and a main beam 11. Two columns 12 are fixedly connected to both ends of the tie beam 13. Supports 14 are installed on the top of the columns 12, and the main beam 11 is installed on the top of the supports 14. Two beam bottom blocks 16 are symmetrically installed below the main beam 11. Tie beam wedges 15 are symmetrically installed at both ends of the top of the tie beam 13. The beam bottom blocks 16 are located between the two tie beam wedges 15. A viscous damper is provided between the tie beam wedges 15 and the adjacent beam bottom blocks 16. An external friction damper is provided, comprising an elastic unit, an upper driven plate, and a lower driven plate. The upper driven plate is installed at the bottom of the main beam 11 via the elastic unit, and the lower driven plate is installed at the top of the tie beam 13 via the elastic unit. A guide rib is provided on the outer periphery of the viscous damper, and guide grooves are provided on the end faces of the upper and lower driven plates near the viscous damper, the guide grooves being adapted to the guide ribs. When the main beam 11 and the column 12 are subjected to wind loads or seismic forces, the viscous damper or friction damper absorbs or dissipates the lateral vibration energy of the bridge.
[0028] When the bridge experiences lateral vibration under wind load or seismic action, the main beam 11 drives the piston rod 18 to reciprocate within the cylinder sleeve 17 via the bottom stop block 16. During this time, the silicone oil damping medium within the cylinder sleeve undergoes shear flow through the medium flow hole during piston movement, generating a velocity-dependent viscous damping force that converts vibration energy into heat dissipation. Simultaneously, the first upper driven plate 22 and the second upper driven plate 24 are fixedly installed at the bottom of the main beam 11 via elastic units, and the first lower driven plate 23 and the second lower driven plate 25 are fixedly installed at the top of the tie beam 13 via elastic units. The elastic units provide friction surfaces. Stable preload; the push protrusion 31 and push ramp 29 on the guide rib cooperate with the push groove 30 and push sloping groove 28 on the driven plate. The tilt angle design of the push ramp 29 converts horizontal vibration into vertical thrust. The device forms a dual damping mechanism through the combination design of viscous damper and friction damper, maintaining good damping effect under vibration of different frequencies and amplitudes, effectively absorbing and dissipating the lateral vibration energy of the bridge. The design of multiple guide and push structures ensures the smoothness and reliability of the movement and avoids local stress concentration. It improves the seismic performance and safety of the bridge structure.
[0029] Furthermore, the viscous damper includes a cylinder liner 17 and a piston rod 18. One end of the cylinder liner 17 is connected to the tie beam wedge block 15, and one end of the piston rod 18 is connected to the beam bottom stop block 16. The other end of the piston rod 18 is installed inside the cylinder liner 17 via a piston. The cylinder liner 17 is provided with a damping medium, and the piston is provided with a medium flow hole. Guide ridges are provided on the outer periphery of both the cylinder liner 17 and the piston rod 18.
[0030] See Figure 2When the bridge experiences lateral vibration under wind load or seismic action, the main beam 11 drives the piston rod 18 to reciprocate within the cylinder sleeve 17 via the bottom stop block 16. During this reciprocating motion, the damping medium within the cylinder sleeve undergoes shear flow through the medium flow hole, generating a velocity-dependent viscous damping force that converts vibration energy into heat dissipation. The guide ribs on the outer periphery of the cylinder sleeve 17 and piston rod 18 respectively engage with guide grooves on the corresponding driven plates, adaptively generating different magnitudes of damping force according to the vibration velocity. The guide ribs not only ensure the stability of the piston movement but also prevent eccentricity between the cylinder sleeve and piston rod, extending the device's service life. The combined design of the viscous damper and the friction damper forms a dual damping mechanism, maintaining good damping performance under vibrations of different frequencies and amplitudes, thus improving the seismic performance and safety of the bridge structure.
[0031] Furthermore, the upper driven plate includes a first upper driven plate 22 and a second upper driven plate 24, and the lower driven plate includes a first lower driven plate 23 and a second lower driven plate 25; the top of the first upper driven plate 22 is fixedly installed on the bottom of the main beam 11 by an elastic unit, and the bottom of the first lower driven plate 23 is fixedly installed on the top of the tie beam 13 by an elastic unit; the guide grooves on the first upper driven plate 22 and the first lower driven plate 23 are adapted to the first guide rib 19 on the outer periphery of the cylinder liner 17; the top of the second upper driven plate 24 is fixedly installed on the bottom of the main beam 11 by an elastic unit, and the bottom of the second lower driven plate 25 is fixedly installed on the top of the tie beam 13 by an elastic unit; the guide grooves on the second upper driven plate 24 and the second lower driven plate 25 are adapted to the second guide rib 20 on the outer periphery of the piston rod 18.
[0032] See Figure 3 First, the double-layer driven plate structure increases the friction contact area and improves the energy dissipation capacity of the device. Second, the setting of elastic units can ensure the stability of the pressure between the friction surfaces and ensure the reliability of the friction damping effect. Third, the cooperation between the guide ridge and the guide groove not only plays a guiding role, but also prevents the driven plate from tilting or deflecting, thus improving the operational stability of the device. Finally, this structural design enables the friction damper to work in conjunction with the viscous damper, and can play a good vibration reduction role under different vibration frequencies and amplitudes, significantly improving the seismic performance and service life of the bridge structure.
[0033] Furthermore, a push-up protrusion 31 is provided in the middle of the guide ridge, and multiple push-up inclined surfaces 29 are provided on both sides of the push-up protrusion 31; a push-up groove 30 is provided in the middle of the guide groove, and multiple push-up inclined grooves 28 are provided on both sides of the push-up groove 30; the push-up protrusion 31 is adapted to the push-up groove 30, and the push-up inclined surface 29 is adapted to the push-up inclined groove 28.
[0034] See Figure 3When the main beam 11 undergoes lateral displacement relative to the tie beam 13, the guide ridge slides in the guide groove, the push protrusion 31 slides in the push groove 30, and at the same time, the push inclined surfaces 29 on both sides slide along the push inclined groove 28. This multi-guide structure not only ensures the smoothness of the movement, but also converts the horizontal vibration force into the vertical push force.
[0035] The multiple push-up inclined surfaces 29 and push-up inclined grooves 28 arranged symmetrically on both sides form a multi-point stress state, which avoids local stress concentration and improves the load-bearing capacity and durability of the structure; the viscous damper and the friction damper work simultaneously to achieve efficient absorption and dissipation of vibration energy.
[0036] Furthermore, the cylinder liner 17 is connected to the tie beam wedge block 15 via a hinge seat 21, and the piston rod 18 is connected to the beam bottom stop block 16 via a hinge seat 21.
[0037] See Figure 2 and Figure 3 When the main beam 11 drives the piston rod 18 to reciprocate within the cylinder sleeve 17 via the bottom stop block 16, the hinge seat 21 allows the cylinder sleeve 17 and piston rod 18 to have a certain degree of rotational freedom, adapting to small angle changes during vibration and avoiding the constraint stress that may result from rigid connections. The hinged connection facilitates installation and adjustment, effectively compensating for construction errors and making fine-tuning of the position easier during installation. Secondly, by reducing constraint stress between components, the risk of material fatigue is reduced, and the hinged structure reduces wear between parts, significantly extending the service life of the entire device. Thirdly, the hinged connection facilitates disassembly, assembly, maintenance, and repair, making parts replacement more convenient. Finally, this hinged connection design works in conjunction with the guiding system, pushing structure, and other parts of the entire device to ensure the stability and reliability of the damping device during use, enabling it to better perform its damping and energy dissipation functions and improving the overall safety and service life of the bridge structure.
[0038] Furthermore, the damping medium inside the cylinder liner 17 is silicone oil, and the number of medium flow holes is 3-6, which are evenly distributed in a ring.
[0039] When the bridge experiences lateral vibration due to wind loads or earthquakes, the main beam 11 drives the piston rod 18 to reciprocate within the cylinder liner 17 via the bottom stop block 16. During this reciprocating motion, the silicone oil within the cylinder liner undergoes shear flow through these uniformly distributed flow holes, generating viscous damping force. Silicone oil, as a damping medium, possesses excellent temperature stability and shear performance, maintaining relatively stable viscosity characteristics under different temperatures and operating conditions, thus ensuring the vibration reduction performance of the device.
[0040] Furthermore, the inclination angle of the push-up inclined surface 29 is 30-55 degrees, and the inclination angle of the push-up inclined groove 28 is adapted to the push-up inclined surface 29.
[0041] When the main beam 11 moves laterally relative to the tie beam 13, causing the viscous damper to extend or compress, the inclined surface 29 at a specific angle can convert part of the horizontal vibration force into the vertical pushing force. The pushing inclined surface 29 and the pushing groove 28 slide relative to each other, which can ensure sufficient pushing force without causing jamming due to excessive angle.
[0042] When the pushing inclined surface 29 slides along the pushing inclined groove 28, it drives the viscous damper and friction damper to work simultaneously, achieving effective absorption and dissipation of vibration energy. At the same time, this tilt angle design also prevents excessive displacement of the bridge under extreme conditions, providing a limiting protection function and improving the overall safety of the bridge. Furthermore, the design of the pushing structure works in conjunction with the guide ribs, guide grooves, and other guiding mechanisms to ensure the smoothness and reliability of the device's movement.
[0043] Furthermore, the contact surfaces of the first upper driven plate 22, the second upper driven plate 24, the first lower driven plate 23, and the second lower driven plate 25 are all provided with wear-resistant layers, and the wear-resistant layers are made of polytetrafluoroethylene material.
[0044] Polytetrafluoroethylene (PTFE) material possesses excellent wear resistance and a stable coefficient of friction, extending the service life of the device while ensuring effective frictional energy dissipation. Furthermore, its coefficient of friction is minimally affected by temperature and speed, maintaining relatively stable frictional characteristics under various operating conditions. In addition, PTFE material exhibits good chemical stability and weather resistance, adapting to the requirements of various harsh environments, further enhancing the applicability and reliability of the device.
[0045] Furthermore, the elastic unit includes a fixed plate 26 and several springs 27. One end of the spring 27 is fixedly connected to the fixed plate 26, and the other end of the spring 27 is fixedly connected to the upper driven plate or the lower driven plate. Furthermore, the spring 27 is a helical compression spring, and 4-8 springs are evenly arranged on each fixed plate 26.
[0046] See Figure 2 The elastic unit in the friction damper adopts a combined structure design of a fixed plate 26 and multiple springs 27. Four to eight helical compression springs 27 are evenly arranged on each fixed plate 26. One end of each spring 27 is fixedly connected to the fixed plate 26, and the other end is fixedly connected to either the upper driven plate or the lower driven plate. This design provides preload through the helical compression springs 27, ensuring a stable contact pressure between the upper and lower driven plates, thereby guaranteeing the friction damping effect.
[0047] When the bridge vibrates laterally, causing the viscous damper to extend or compress, the fixed plate 26 transmits pressure evenly to the driven plate through multiple evenly distributed springs 27, so that a stable frictional force is generated between the first upper driven plate 22 and the first lower driven plate 23, and between the second upper driven plate 24 and the second lower driven plate 25, which dissipates the vibration energy on the cylinder liner 17 or piston rod 18 that moves the viscous damper.
[0048] The use of 4-8 evenly distributed helical compression springs not only avoids uneven local stress but also provides sufficient preload redundancy. Even if individual springs malfunction, the others can still maintain normal preload, ensuring reliable operation of the device. Furthermore, the helical compression springs possess excellent elastic deformation capacity and fatigue performance, enabling them to withstand long-term, repetitive working conditions and ensuring stable performance throughout the device's service life.
[0049] This utility model is illustrated through the above embodiments, but it is not limited to these embodiments, meaning that it does not necessarily depend on them for implementation. Those skilled in the art should understand that all related improvements to this utility model fall within its protection and disclosure scope.
Claims
1. A bridge vibration damping and energy dissipation device, comprising columns (12), tie beams (13), supports (14), and a main beam (11), wherein two columns (12) are fixedly connected to both ends of the tie beams (13), supports (14) are installed on the top of the columns (12), and the main beam (11) is installed on the top of the supports (14), characterized in that, Two beam bottom blocks (16) are symmetrically installed below the main beam (11), and tie beam wedges (15) are symmetrically installed at both ends of the top of the tie beam (13). The beam bottom blocks (16) are located between the two tie beam wedges (15). A viscous damper is provided between the tie beam wedge (15) and the adjacent beam bottom stop (16), and a friction damper is provided outside the viscous damper. The friction damper includes an elastic unit, an upper driven plate and a lower driven plate. The upper driven plate is installed at the bottom of the main beam (11) through an elastic unit, and the lower driven plate is installed at the top of the tie beam (13) through an elastic unit. A guide rib is provided on the outer periphery of the viscous damper. Guide grooves are opened on the end faces of the upper driven plate and the lower driven plate near the viscous damper. The guide grooves are adapted to the guide ribs. When the main beam (11) and column (12) are subjected to wind loads or seismic action, the viscous damper or friction damper absorbs or dissipates the lateral vibration energy of the bridge.
2. The bridge vibration damping and energy dissipation device according to claim 1, characterized in that, The viscous damper includes a cylinder liner (17) and a piston rod (18). One end of the cylinder liner (17) is connected to the tie beam wedge (15), and one end of the piston rod (18) is connected to the bottom stop block (16) of the beam. The other end of the piston rod (18) is installed in the cylinder liner (17) through a piston. The cylinder liner (17) is provided with a damping medium, and the piston is provided with a medium flow hole. Guide ribs are provided on the outer periphery of both the cylinder liner (17) and the piston rod (18).
3. The bridge vibration damping and energy dissipation device according to claim 2, characterized in that, The upper driven plate includes a first upper driven plate (22) and a second upper driven plate (24), and the lower driven plate includes a first lower driven plate (23) and a second lower driven plate (25); the top of the first upper driven plate (22) is fixedly installed on the bottom of the main beam (11) by an elastic unit, and the bottom of the first lower driven plate (23) is fixedly installed on the top of the tie beam (13) by an elastic unit; the guide grooves on the first upper driven plate (22) and the first lower driven plate (23) are adapted to the first guide rib (19) on the outer periphery of the cylinder liner (17); The top of the second upper driven plate (24) is fixedly installed on the bottom of the main beam (11) by an elastic unit, and the bottom of the second lower driven plate (25) is fixedly installed on the top of the tie beam (13) by an elastic unit. The guide grooves on the second upper driven plate (24) and the second lower driven plate (25) are adapted to the second guide rib (20) on the outer periphery of the piston rod (18).
4. The bridge vibration damping and energy dissipation device according to claim 2, characterized in that, A push-up protrusion (31) is provided in the middle of the guide ridge, and multiple push-up inclined surfaces (29) are provided on both sides of the push-up protrusion (31); a push-up groove (30) is provided in the middle of the guide groove, and multiple push-up inclined grooves (28) are provided on both sides of the push-up groove (30); the push-up protrusion (31) is adapted to the push-up groove (30), and the push-up inclined surface (29) is adapted to the push-up inclined groove (28).
5. The bridge vibration damping and energy dissipation device according to claim 3, characterized in that, The cylinder liner (17) is connected to the tie beam wedge (15) via a hinge seat, and the piston rod (18) is connected to the bottom stop block (16) via a hinge seat.
6. The bridge vibration damping and energy dissipation device according to claim 2, characterized in that, The damping medium inside the cylinder liner (17) is silicone oil, and the number of medium flow holes is 3-6, which are evenly distributed in a ring.
7. The bridge vibration damping and energy dissipation device according to claim 4, characterized in that, The inclination angle of the push-up inclined surface (29) is 30-55 degrees, and the inclination angle of the push-up inclined groove (28) is adapted to the push-up inclined surface (29).
8. The bridge vibration damping and energy dissipation device according to claim 3, characterized in that, The contact surfaces of the first upper driven plate (22), the second upper driven plate (24), the first lower driven plate (23), and the second lower driven plate (25) are all provided with wear-resistant layers, and the wear-resistant layers are made of polytetrafluoroethylene material.
9. The bridge vibration damping and energy dissipation device according to claim 3, characterized in that, The elastic unit includes a fixed plate (26) and several springs (27). One end of the spring (27) is fixedly connected to the fixed plate (26), and the other end of the spring (27) is fixedly connected to the upper driven plate or the lower driven plate.
10. The bridge vibration damping and energy dissipation device according to claim 9, characterized in that, The spring (27) is a helical compression spring, and 4-8 springs are evenly arranged on each fixed plate (26).