Displacement amplification type energy dissipation device for bridge

Abstract

This invention provides a displacement-amplified energy-dissipating vibration damping device for bridges, relating to the technical field of bridge vibration damping equipment. A base structure is slidably connected to a slider structure along a first direction. A connecting steel arm structure is used to connect to the main beam, and includes a first gear and a second gear coaxially connected. The first gear meshes with the base structure; the second gear meshes with the slider structure, so that when the connecting steel arm structure moves relative to the base structure along the first direction, the slider structure moves in the same direction as the connecting steel arm structure. The energy-dissipating structure includes a pin and two sets of elastic energy-dissipating components connected by the pin. The base structure limits the movement of the two sets of elastic energy-dissipating components along the first direction. This invention alleviates the technical problem in the prior art where limited relative displacement makes it difficult to fully dissipate seismic input energy, thus restricting the working efficiency and energy dissipation effect of the vibration damping device, leading to significant damage to bridges and traffic disruption.

Description

Technical Field

[0001] This invention relates to the technical field of bridge vibration reduction equipment, and in particular to a displacement-amplified energy-dissipating vibration reduction device for bridges. Background Technology

[0002] Under earthquake action, strong dynamic loads can cause serious damage to bridge structures. As a key node in the transportation network, damage to bridges often leads to regional traffic paralysis. Therefore, ensuring the seismic performance of bridge structures is of great engineering significance.

[0003] In recent years, scholars both domestically and internationally have conducted extensive research on vibration reduction technology for bridge structures. Vibration reduction devices have become an important means of improving the seismic resistance of bridges in strong earthquake zones and have been widely used in highway and railway bridges. Currently, vibration reduction devices successfully applied in actual engineering projects mainly include friction pendulum bearings, cable-stayed bearings, and E-type steel damping bearings.

[0004] However, most existing damping devices rely solely on the relative displacement between piers and beams for energy dissipation in practical applications. In some cases, even if the relative displacement is not large, the structure may still suffer severe damage, and the limited relative displacement is insufficient to fully dissipate the seismic input energy, thus significantly limiting the working efficiency and energy dissipation effect of the damping device. Summary of the Invention

[0005] The purpose of this invention is to provide a displacement-amplified energy-dissipating vibration damping device for bridges, so as to alleviate the technical problem in the prior art that the limited relative displacement makes it difficult to fully dissipate the seismic input energy, which restricts the working efficiency and energy dissipation effect of the vibration damping device, and thus causes serious damage to bridges and paralyzes traffic.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides a displacement-enlarged energy-dissipating and vibration-damping device for bridges, comprising a base structure, a connecting steel arm structure, an energy-dissipating structure and a slider structure. The base structure is used to connect with the top surface of the bridge pier, and the base structure is slidably connected to the slider structure along a first direction. The connecting steel arm structure is used to connect with the main beam. The connecting steel arm structure includes a first gear and a second gear that are coaxially connected. The first gear meshes with the base structure. The second gear meshes with the slider structure so that when the connecting steel arm structure moves relative to the base structure in the first direction, the slider structure moves in the same direction as the connecting steel arm structure. The energy-dissipating structure includes a pin and two sets of elastic energy-dissipating components connected by the pin, and the base structure limits the two sets of elastic energy-dissipating components along a first direction. The two sets of elastic energy dissipation components are arranged on both sides of the slider structure and are connected to the slider structure. The two sets of elastic energy dissipation components are used to limit the movement distance of the slider structure along the first direction by clamping the slider structure.

[0007] Furthermore, each set of the elastic energy dissipation components includes an energy dissipation plate, a fastening nut, and an elastic element. The two sets of energy dissipation plates are arranged on both sides of the slider structure, and the elastic element is provided on the side of the energy dissipation plate opposite to the slider structure. The pin passes through the corresponding elastic element, the energy-consuming plate, and the slider structure in sequence, and the fastening nut is fixed at both ends of the pin so that the two sets of energy-consuming plates clamp the slider structure.

[0008] Furthermore, the slider structure includes a slider body and a wedge-shaped protrusion, wherein the slider body is connected to the wedge-shaped protrusion; The energy-consuming plate has a friction groove on the side facing the slider structure. The friction groove is fitted and connected to the wedge-shaped protrusion, and the wedge-shaped protrusion is accommodated in the corresponding friction groove.

[0009] Furthermore, both the friction groove and the wedge-shaped protrusion are provided with wear-resistant consumables.

[0010] Furthermore, slots are provided at both ends of the energy-consuming board; The base structure includes a base body and a sliding groove. The sliding groove is connected to the base body and is slidably connected to the corresponding slot in a second direction, and is used to limit the energy-consuming board relative to the base body in a first direction.

[0011] Furthermore, the base structure also includes a rack distributed along a first direction, the rack being connected to the base body and meshing with a corresponding first gear.

[0012] Furthermore, the slider body has side ends on both sides, and the side ends are provided with toothed grooves along the first direction; The tooth groove meshes with the corresponding second gear.

[0013] Furthermore, the connecting steel arm structure includes a steel arm body and a gear transmission assembly, wherein the steel arm body is used to connect to the main beam; The gear transmission assembly includes a gear base, a first gear, and a second gear. The gear base is connected to the steel arm body, and the gear base is connected to the first gear and the second gear in sequence via a rotating shaft.

[0014] Furthermore, the outer diameter of the second gear is larger than the outer diameter of the first gear.

[0015] Furthermore, the slider body is provided with a slide rail along the first direction; The connecting steel arm structure also includes a fixed pulley, which is connected to the steel arm body and slidably connected to the slide rail.

[0016] The present invention can achieve the following beneficial effects: This invention provides a displacement-amplified energy-dissipating and vibration-damping device for bridges, comprising a base structure, a connecting steel arm structure, an energy-dissipating structure, and a slider structure. The base structure is used to connect to the top surface of the bridge pier and is slidably connected to the slider structure along a first direction. The connecting steel arm structure is used to connect to the main beam and includes a first gear and a second gear coaxially connected. The first gear meshes with the base structure, and the second gear meshes with the slider structure so that when the connecting steel arm structure moves relative to the base structure along the first direction, the slider structure moves in the same direction as the connecting steel arm structure. The energy-dissipating structure includes a pin and two sets of elastic energy-dissipating components connected by the pin. The base structure limits the movement of the two sets of elastic energy-dissipating components along the first direction. The two sets of elastic energy-dissipating components are arranged on both sides of the slider structure and are connected to the slider structure. The two sets of elastic energy-dissipating components are used to limit the movement distance of the slider structure along the first direction by clamping the slider structure.

[0017] In this invention, the base structure is connected to the top surface of the corresponding pier by multiple bolts, which are spaced apart along the edge of the base to securely install the base structure onto the top of the pier. Correspondingly, the connecting steel arm structure is connected to the main beam by multiple matrix-distributed bolts. The connecting steel arm structure is equipped with two sets of opposing gear transmission assemblies. Each set of gear transmission assemblies includes a first gear and a second gear. The first gear meshes with the base structure to ensure that when the pier and the main beam move relative to each other, the first gear rolls relative to the base structure along a first direction. The second gear meshes with the slider structure, which can slide relative to the base structure along the first direction. When the connecting steel arm structure moves, the second gear, having the same angular velocity as the first gear, rotates synchronously with it. Consequently, the second gear can drive the slider structure to move along the first direction. At this time, the slider structure is displaced relative to the base structure. The energy-dissipating structures located on both sides of the slider structure, being limited relative to the base structure, do not move synchronously with the slider structure. This causes the slider structure to push the energy-dissipating structures to both sides along the second direction as it moves along the first direction. This results in the elastic elements of the energy-dissipating structures being compressed and undergoing elastic deformation, increasing the sliding resistance of the slider structure and thus achieving the energy dissipation effect.

[0018] Compared with the prior art, the displacement-amplified energy-dissipating and vibration-damping device for bridges provided by the present invention connects the base structure to the top of the pier and the connecting steel arm structure to the main beam. The energy dissipation of the two can be achieved through the relative movement of the energy-dissipating structure and the slider structure. Specifically, when the pier and the main beam move relative to each other, the connecting steel arm structure moves relative to the base structure. At this time, the connecting steel arm structure drives the slider structure to move. While the slider structure moves, it pushes the energy-dissipating structures on both sides to move in a second direction, thereby squeezing the elastic element of the energy-dissipating structure. This increases the frictional resistance of the slider structure when it slides through the elastic element, thereby effectively and fully dissipating the input energy of the earthquake and avoiding damage to the bridge.

[0019] In summary, this invention at least alleviates the technical problem in the prior art where the limited relative displacement makes it difficult to fully dissipate the input energy of earthquakes, thus restricting the working efficiency and energy dissipation effect of the damping device, and consequently causing significant damage to bridges and paralyzing traffic. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A three-dimensional structural schematic diagram of a displacement-enlarged energy-dissipating and vibration-damping device for bridges provided in an embodiment of the present invention; Figure 2 This is an exploded structural diagram of a displacement-enlarged energy-dissipating and vibration-damping device for bridges provided in an embodiment of the present invention. Figure 3 A three-dimensional structural schematic diagram of the slider portion of the displacement-enlarged energy-dissipating and vibration-damping device for bridges provided in an embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the energy-dissipating plate portion of the displacement-enlarged energy-dissipating and vibration-damping device for bridges provided in an embodiment of the present invention. Figure 5 A three-dimensional structural diagram of the base plate portion of the displacement-enlarged energy-dissipating and vibration-damping device for bridges provided in an embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the gear transmission assembly of the displacement-amplified energy-dissipating and vibration-damping device for bridges provided in an embodiment of the present invention.

[0022] Icons: 1-Base structure; 11-Base body; 12-Rack; 13-Slide groove; 2-Connecting steel arm structure; 21-Steel arm body; 22-Gear transmission assembly; 221-Gear base; 222-First gear; 223-Second gear; 23-Fixed pulley; 3-Energy dissipation structure; 31-Energy dissipation plate; 311-Friction groove; 312-Groove; 32-Pin; 33-Fasting nut; 34-Elastic element; 4-Slider structure; 41-Slider body; 411-Side end; 4111-Gear groove; 412-Through hole; 413-Slide rail; 42-Wedge-shaped protrusion. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this invention, it should be noted that the terms "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and 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 a limitation of this invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Example 1 This embodiment provides a displacement-amplified energy-dissipating and vibration-damping device for bridges, referring to... Figure 1 and Figure 6 The bridge displacement-amplified energy-dissipating and vibration-damping device includes a base structure 1, a connecting steel arm structure 2, an energy-dissipating structure 3, and a slider structure 4. The base structure 1 is used to connect to the top surface of the pier, and the base structure 1 is slidably connected to the slider structure 4 along a first direction. The connecting steel arm structure 2 is used to connect to the main beam. The connecting steel arm structure 2 includes a first gear 222 and a second gear 223 coaxially connected. The first gear 222 is meshed with the base structure 1. The second gear 223 is meshed with the slider structure 4, so that when the connecting steel arm structure 2 moves relative to the base structure 1 along the first direction, the slider structure 4 moves in the same direction as the connecting steel arm structure 2. The energy-dissipating structure 3 includes a pin 32 and two sets of elastic energy-dissipating components connected by the pin 32. The base structure 1 limits the movement of the two sets of elastic energy-dissipating components along the first direction. The two sets of elastic energy-dissipating components are arranged on both sides of the slider structure 4 and are connected to the slider structure 4. The two sets of elastic energy-dissipating components are used to limit the movement distance of the slider structure 4 along the first direction by clamping the slider structure 4.

[0031] The embodiments of the present invention at least alleviate the technical problem in the prior art that the limited relative displacement makes it difficult to fully dissipate the seismic input energy, which restricts the working efficiency and energy dissipation effect of the damping device, thereby causing serious damage to bridges and paralyzing traffic.

[0032] In this embodiment of the invention, the base structure 1 is connected to the top surface of the corresponding pier by multiple bolts, which are spaced apart along the edge of the base structure 1 to securely install the base structure 1 on the top of the pier. Correspondingly, the connecting steel arm structure 2 is connected to the main beam by multiple matrix-distributed bolts. The connecting steel arm structure 2 is provided with two sets of relatively distributed gear transmission assemblies 22. Each set of gear transmission assemblies 22 includes a first gear 222 and a second gear 223. The first gear 222 is used to mesh with the base structure 1 so that when the pier and the main beam move relative to each other, the first gear 222 rolls relative to the base structure 1 along a first direction. The second gear 223 meshes with the slider structure 4, which can slide relative to the base structure 1 in the first direction. When the connecting steel arm structure 2 moves, the second gear 223 rotates synchronously with the first gear 222 because it has the same angular velocity as the first gear 222. As a result, the second gear 223 can drive the slider structure 4 to move in the first direction. At this time, the slider structure 4 is displaced relative to the base structure 1. The energy-dissipating structures 3 located on both sides of the slider structure 4 are limited relative to the base structure 1 and will not move synchronously when the slider structure 4 moves. As a result, the slider structure 4 pushes the energy-dissipating structures 3 to both sides in the second direction during the movement of the slider structure 4 in the first direction. This causes the elastic element 34 of the energy-dissipating structure 3 to be squeezed and produce elastic deformation, increasing the sliding resistance of the slider structure 4 during sliding, so as to achieve the function of energy consumption.

[0033] Compared with the prior art, the displacement-amplified energy-dissipating and vibration-damping device for bridges provided in this embodiment of the invention connects the base structure 1 to the top of the pier and the connecting steel arm structure 2 to the main beam. The energy dissipation of the two can be achieved through the relative movement of the energy-dissipating structure 3 and the slider structure 4. Specifically, when the pier and the main beam move relative to each other, the connecting steel arm structure 2 moves relative to the base structure 1. At this time, the connecting steel arm structure 2 drives the slider structure 4 to move. While the slider structure 4 is moving, it pushes the energy-dissipating structures 3 on both sides to move in the second direction, thereby compressing the elastic element 34 of the energy-dissipating structure 3. This achieves energy dissipation through the elastic deformation of the elastic element 34. The compression of the elastic element 34 increases the frictional resistance of the slider structure 4 when sliding, thereby effectively and fully dissipating the input energy of the earthquake and avoiding damage to the bridge.

[0034] Furthermore, referring to Figure 1 and Figure 2Each set of elastic energy dissipation components includes an energy dissipation plate 31, a fastening nut 33, and an elastic element 34. The two sets of energy dissipation plates 31 are arranged on both sides of the slider structure 4, and the elastic element 34 is provided on the side of the energy dissipation plate 31 away from the slider structure 4. The pin 32 passes through the corresponding energy dissipation plate 31, the elastic element 34, and the slider structure 4 in sequence. The fastening nut 33 is fixed at both ends of the pin 32 so that the two sets of energy dissipation plates 31 clamp the slider structure 4.

[0035] Specifically, there are two sets of energy-dissipating plates 31, which are arranged on both sides of the slider body 41 of the slider structure 4. The energy-dissipating plates 31 are provided with through holes for the pin shaft 32 to pass through along their extension direction. At both ends of the pin shaft, there are fastening nuts 33. An elastic element 34 is provided between the fastening nuts 33 and the energy-dissipating plates 31. The elastic element 34 is an object that can generate additional elastic force by compression. It can be a butterfly spring, a leaf spring, a ring spring, or a coil spring, etc. That is, the fastening nuts 33 at both ends of the pin shaft 32 limit the two sets of energy-dissipating plates 31 respectively, so that when the two sets of energy-dissipating plates 31 are compressed by the slider body 41, the energy-dissipating plates 31 will not move too far. The energy-dissipating plates 31 apply the thrust of the slider body 41 to the elastic element 34, so that the elastic element 34 will produce elastic deformation after being subjected to force, effectively increasing the sliding resistance of the slider body 41 during sliding, thereby realizing the dissipation of kinetic energy and reducing the impact and damage of earthquakes on the bridge structure.

[0036] Furthermore, referring to Figure 2 and Figure 3 The slider structure 4 includes a slider body 41 and a wedge-shaped protrusion 42. The slider body 41 is connected to the wedge-shaped protrusion 42. The energy-consuming plate 31 has a friction groove 311 on the side facing the slider structure 4. The friction groove 311 is fitted and connected to the wedge-shaped protrusion 42, and the wedge-shaped protrusion 42 is accommodated in the corresponding friction groove 311.

[0037] Specifically, the slider body 41 is provided with a wedge-shaped protrusion 42. The connection method involves opening a rectangular through hole in the middle of the slider body 41, then placing the wedge-shaped protrusion 42 within this rectangular through hole, and fixing the wedge-shaped protrusion 42 to the slider body 41 from the side using bolts. The side of the wedge-shaped protrusion 42 is designed with a more prominent central portion and a converging edge. Correspondingly, the friction groove 311 is designed with a recessed central portion, so that the protruding portion of the wedge-shaped protrusion 42 is located at the recessed central portion of the friction groove 311. This allows the wedge-shaped protrusion 42 to move relative to the friction groove 311 when the slider structure 4 is displaced, thereby causing the protruding portion of the wedge-shaped protrusion 42 to move out of the recessed central portion of the friction groove 311, thus pushing the energy-consuming plate 31 to move along the second direction.

[0038] Furthermore, referring to Figure 2 and Figure 3The surfaces of the friction groove 311 and the wedge-shaped protrusion 42 are both provided with wear-resistant consumables.

[0039] Specifically, the surfaces of the friction groove 311 and the wedge-shaped protrusion 42 are both provided with wear-resistant consumables so that when the friction groove 311 and the wedge-shaped protrusion 42 are relatively displaced, they will not be damaged. Therefore, the service life of the friction groove 311 and the wedge-shaped protrusion 42 can be extended to a certain extent.

[0040] In an optional implementation of this embodiment, refer to Figure 2 and Figure 4 The energy-consuming board 31 has slots 312 at both ends; the base structure 1 includes a base body 11 and a sliding groove 13. The sliding groove 13 is connected to the base body 11, and the sliding groove 13 is slidably connected to the corresponding slots 312 in the second direction, and is used to limit the energy-consuming board 31 relative to the base body 11 in the first direction.

[0041] Specifically: each energy-consuming board 31 has symmetrical slots 312 at both ends. Correspondingly, the base body 11 has sliding grooves 13 at both ends. The sliding grooves 13 have a bent structure so that their bent parts can be inserted into the corresponding slots 312. This allows the energy-consuming board 31 to be limited in the first direction by the sliding grooves 13 at both ends, while the slots 312 at both ends of the energy-consuming board 31 can slide along the corresponding sliding grooves 13, that is, slide in the second direction.

[0042] Furthermore, referring to Figure 1 , Figure 2 and Figure 5 The base structure 1 also includes a rack 12 distributed along the first direction. The rack 12 is connected to the base body 11 and meshes with the corresponding first gear 222.

[0043] Specifically: racks 12 are distributed on the upper surface of the base body 11. Each set of racks 12 is distributed along the first direction. The racks 12 are meshed with the corresponding first gears 222 so that when the connecting steel arm structure 2 moves relative to the base structure 1, the first gears 222 can roll along the racks 12, thereby making the movement of the connecting steel arm structure 2 relative to the base structure 1 more stable.

[0044] In an optional implementation of this embodiment, refer to Figure 3 Both sides of the slider body 41 are provided with side ends 411, and the side ends 411 are provided with toothed grooves 4111 along the first direction; the toothed grooves 4111 are meshed with the corresponding second gear 223.

[0045] Specifically: the top of the slider body 41 extends to both sides along the second direction to form side ends 411, and the end of the side ends 411 facing away from the slider body 41 is folded down and has a toothed groove 4111 along the first direction. This toothed groove 4111 is used to mesh with the second gear 223. In use, when the connecting steel arm structure 2 is displaced relative to the base structure 1, the second gear 223 rotates synchronously with the first gear 222, and then the second gears 223 on both sides drive the slider structure 4 to move along the first direction.

[0046] In an optional implementation of this embodiment, refer to Figure 6 The connecting steel arm structure 2 includes a steel arm body 21 and a gear transmission assembly 22. The steel arm body 21 is used to connect with the main beam. The gear transmission assembly 22 includes a gear base 221, a first gear 222 and a second gear 223. The gear base 221 is connected to the steel arm body 21, and the gear base 221 is connected to the first gear 222 and the second gear 223 in sequence through a rotating shaft.

[0047] Specifically: The top of the steel arm body 21 is connected to the main beam by multiple bolts, and both ends of the steel arm body 21 are bent downwards, with gear bases 221 provided on the inner walls of both ends. Each gear base has two sets of gears, and each set of gears includes a first gear 222 and a second gear 223. In use, when the connecting steel arm structure 2 moves relative to the base structure 1, the first gear 222 moves along the rack 12, while the second gear 223 moves along the tooth groove 4111.

[0048] Furthermore, referring to Figure 6 The outer diameter of the second gear 223 is larger than the outer diameter of the first gear 222.

[0049] Specifically, the outer diameter of the second gear 223 is larger than that of the first gear 222, so that when the second gear 223 and the first gear 222 rotate at the same angle, the displacement length of the slider structure 4 is longer; that is, while the connecting steel arm structure 2 moves a shorter distance, the slider structure 4 moves a longer distance, which in turn makes the slider structure 4 push the energy dissipation plate 31 a longer distance, which makes the elastic element 34 more compressed, and thus makes the elastic element 34 undergo greater elastic deformation, so that the slider body 41 generates greater sliding resistance when sliding, and has a better energy dissipation effect.

[0050] In an optional implementation of this embodiment, refer to Figure 1 , Figure 2 and Figure 3 The slider body 41 is provided with a slide rail 413 along the first direction; the connecting steel arm structure 2 also includes a fixed pulley 23, which is connected to the steel arm body 21 and is slidably connected to the slide rail 413.

[0051] Specifically: a slide rail 413 is provided on the top of the slider body 41 along the first direction, and a fixed pulley 23 is provided on the bottom of the steel arm body 21; it should be noted that there can be two slide rails 413, and the two slide rails 413 are distributed in the same direction at intervals, while there can be four fixed pulleys 23, in which each slide rail 413 is slidably connected to two fixed pulleys 23. In use, when the connecting steel arm structure 2 moves relative to the base structure 1, the connecting steel arm structure 2 drives the slider structure 4 to move in the same direction. However, since the travel distances of the connecting steel arm structure 2 and the slider structure 4 are different, there is relative movement between the connecting steel arm structure 2 and the slider structure 4. The fixed pulleys 23 move within the slide rail 413 to make the movement of the connecting steel arm structure 2 relative to the slider structure 4 smoother.

[0052] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments in this specification are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A displacement-amplified energy-dissipating vibration damping device for bridges, characterized in that, It includes a base structure (1), a connecting steel arm structure (2), an energy-dissipating structure (3) and a slider structure (4). The base structure (1) is used to connect with the top surface of the pier, and the base structure (1) is slidably connected with the slider structure (4) along a first direction. The connecting steel arm structure (2) is used to connect with the main beam. The connecting steel arm structure (2) includes a first gear (222) and a second gear (223) connected coaxially. The first gear (222) meshes with the base structure (1). The second gear (223) meshes with the slider structure (4) so ​​that when the connecting steel arm structure (2) moves relative to the base structure (1) in the first direction, the slider structure (4) moves in the same direction as the connecting steel arm structure (2). The energy-consuming structure (3) includes a pin (32) and two sets of elastic energy-consuming components connected by the pin (32), and the base structure (1) limits the two sets of elastic energy-consuming components along a first direction; The two sets of elastic energy dissipation components are arranged on both sides of the slider structure (4) and are connected to the slider structure (4). The two sets of elastic energy dissipation components are used to increase the sliding resistance of the slider structure (4) by clamping the slider structure (4).

2. The bridge displacement-amplified energy-dissipating vibration damping device according to claim 1, characterized in that, Each set of the elastic energy dissipation components includes an energy dissipation plate (31), a fastening nut (33), and an elastic element (34). The two sets of energy dissipation plates (31) are arranged on both sides of the slider structure (4), and the elastic element (34) is provided on the side of the energy dissipation plate (31) away from the slider structure (4). The pin (32) passes through the corresponding elastic element (34), the energy-consuming plate (31) and the slider structure (4) in sequence, and the fastening nut (33) is fixed at both ends of the pin (32) so that the two sets of energy-consuming plates (31) clamp the slider structure (4).

3. The bridge displacement-amplified energy-dissipating vibration damping device according to claim 2, characterized in that, The slider structure (4) includes a slider body (41) and a wedge-shaped protrusion (42), wherein the slider body (41) is connected to the wedge-shaped protrusion (42); The energy-consuming plate (31) has a friction groove (311) on the side facing the slider structure (4). The friction groove (311) is in close contact with the wedge-shaped protrusion (42) and the wedge-shaped protrusion (42) is accommodated in the corresponding friction groove (311).

4. The bridge displacement-enlarged energy-dissipating vibration damping device according to claim 3, characterized in that, The surfaces of the friction groove (311) and the wedge-shaped protrusion (42) are both provided with wear-resistant consumables.

5. The bridge displacement-amplified energy-dissipating vibration damping device according to claim 2, characterized in that, The energy-consuming plate (31) has slots (312) at both ends. The base structure (1) includes a base body (11) and a slide groove (13). The slide groove (13) is connected to the base body (11), and the slide groove (13) is slidably connected to the corresponding slot (312) in a second direction, and is used to limit the energy-consuming plate (31) relative to the base body (11) in a first direction.

6. The displacement-amplified energy-dissipating vibration damping device for bridges according to claim 5, characterized in that, The base structure (1) further includes a rack (12) distributed along a first direction, the rack (12) being connected to the base body (11), and the rack (12) being meshed with the corresponding first gear (222).

7. The bridge displacement-amplified energy-dissipating vibration damping device according to claim 3, characterized in that, The slider body (41) has side ends (411) on both sides, and the side ends (411) have toothed grooves (4111) along the first direction. The tooth groove (4111) meshes with the corresponding second gear (223).

8. The bridge displacement-amplified energy-dissipating vibration damping device according to claim 3, characterized in that, The connecting steel arm structure (2) includes a steel arm body (21) and a gear transmission assembly (22), wherein the steel arm body (21) is used to connect to the main beam; The gear transmission assembly (22) includes a gear base (221), a first gear (222) and a second gear (223). The gear base (221) is connected to the steel arm body (21), and the gear base (221) is connected to the first gear (222) and the second gear (223) in sequence through a rotating shaft.

9. The displacement-amplified energy-dissipating vibration damping device for bridges according to claim 8, characterized in that, The outer diameter of the second gear (223) is larger than the outer diameter of the first gear (222).

10. The bridge displacement-amplified energy-dissipating vibration damping device according to claim 8, characterized in that, The slider body (41) is provided with a slide rail (413) along the first direction; The connecting steel arm structure (2) also includes a fixed pulley (23), which is connected to the steel arm body (21) and is slidably connected to the slide rail (413).

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