An energy-consuming device and bridge suitable for low-clearance piers and beams

Abstract

This application relates to an energy dissipation device and bridge suitable for low-clearance piers and beams. The device includes a first sliding plate, a second sliding plate, and an elastic damping element. The elastic damping element adjusts the gap between the first and second sliding plates by adjusting the distance between its two ends during installation. When the gap is zero, it can also adjust the vertical force between the first and second sliding plates, so that when the first and second sliding plates are slidably connected, they work together with the elastic damping element to dampen and reduce vibration in the bridge. The energy dissipation device provided by this application can adjust the gap between the first and second sliding plates according to the clearance between the piers and beams, adapting to the installation of piers and beams with different clearances, especially low clearances. In addition to the elastic damping element being used for damping and reducing vibration in the bridge, the first and second sliding plates, when the gap is zero, can further assist the elastic damping element in damping and reducing vibration in the bridge, improving the applicability while ensuring the effectiveness of damping and reducing vibration.

Description

Technical Field

[0001] This application relates to the field of bridge engineering technology, and in particular to an energy-consuming device and bridge suitable for low-clearance pier beams. Background Technology

[0002] Currently, with the rapid development of bridge design, research and construction technologies, bridge system types are becoming increasingly diverse. Domestic bridge energy dissipation and vibration reduction devices are mostly used for longitudinal vibration reduction, while dampers used to solve transverse vibration reduction problems are rare.

[0003] Among related technologies, metal damping elements in transverse damping devices have gained favor among structural engineers due to their stable hysteretic energy dissipation performance, diverse forms, and economical cost. In particular, the emergence of soft steel dampers has sparked a research boom in metal damping elements in structural engineering.

[0004] However, traditional viscous dampers or metal dampers have certain requirements on the size of the longitudinal space. Some bridges have relatively small isolation layer space, or the clearance between the main beam and the pier is relatively low. In this case, traditional viscous dampers or metal dampers cannot be used for energy dissipation and vibration reduction in the transverse direction of the bridge between the isolation layer or the main beam and the pier. Summary of the Invention

[0005] This application provides an energy dissipation device and bridge suitable for low-clearance piers and beams, in order to solve the problem in the related art that when the space of the seismic isolation layer of the bridge is insufficient, or the clearance between the main beam and the pier is low, traditional viscous dampers or metal dampers cannot be used for energy dissipation and vibration reduction in the transverse direction of the bridge in the seismic isolation layer or between the main beam and the pier.

[0006] In a first aspect, an energy-consuming device suitable for low-clearance pier beams is provided, comprising:

[0007] The first energy dissipation unit is used to connect to the main beam, and the first energy dissipation unit includes a first sliding plate;

[0008] The second energy-consuming unit is used to connect to the pier beam, and the second energy-consuming unit includes a second sliding plate disposed below the first sliding plate;

[0009] An elastic damping unit includes a plurality of elastic damping elements spaced apart on both sides of the second energy dissipation unit, wherein the two ends of each elastic damping element are respectively connected to the first energy dissipation unit and the second energy dissipation unit; wherein,

[0010] The elastic damping unit is used to adjust the gap between the first sliding plate and the second sliding plate by adjusting the distance between its two ends when they are installed. The elastic damping element is also used to adjust the vertical force between the first sliding plate and the second sliding plate when the gap is zero. The first sliding plate and the second sliding plate are slidably connected when the gap is zero, so as to work together with the elastic damping unit for damping and shock absorption.

[0011] In some embodiments, the first energy-consuming unit further includes a connecting component for connecting to the main beam and for transmitting the displacement of the main beam along the transverse direction of the bridge to the first sliding plate, and for amplifying the displacement by at least one time.

[0012] In some embodiments, the connection component includes:

[0013] Multiple rotating cranks, one end of which is connected to the main beam and the other end is connected to the first sliding plate;

[0014] Multiple support hinge shafts are provided, each passing through the rotating crank and with both ends fixedly connected to the second energy-consuming unit; wherein,

[0015] The rotating crank is used to rotate about the corresponding support hinge axis under the drive of the main beam, so as to drive the first sliding plate to move laterally along the bridge.

[0016] In some embodiments, at least one buffer spring is provided between the rotating crank and the first sliding plate, one end of the buffer spring being connected to one of the rotating cranks and the other end being connected to the first sliding plate.

[0017] In some embodiments, the first energy-consuming unit further includes a central connecting plate, which is disposed between the rotating crank and the first sliding plate and is connected to the rotating crank and the first sliding plate respectively. The central connecting plate is connected to the end of the buffer spring away from the corresponding rotating crank. Both sides of the central connecting plate parallel to the longitudinal direction of the bridge are connected to the upper end of a portion of the elastic damping unit.

[0018] In some embodiments, the second energy-consuming unit further includes at least two sets of support units, which are respectively disposed on both sides of the second energy-consuming unit and the bridge horizontally parallel. Each support unit includes at least one vertically arranged support plate, the bottom end of which is used to connect to the pier beam, and the support plate is connected to one end of the support hinge shaft located on the same side.

[0019] In some embodiments, the bottom surface of the first sliding plate is provided with a protrusion, and the top surface of the second sliding plate is provided with a groove that matches the protrusion.

[0020] In some embodiments, the surfaces of the protrusions and grooves are coated with a friction-enhancing coating.

[0021] In some embodiments, the elastic damping element has a frame structure, the elastic damping element includes an open end and a closed end, the size of the open end is adjustable, and the two ends of the open end are respectively connected to the first energy dissipation unit and the second energy dissipation unit.

[0022] Secondly, a bridge is provided, which includes:

[0023] A pier beam, the top of which is equipped with a main beam;

[0024] At least one of the aforementioned energy-consuming devices is disposed between the pier beam and the main beam.

[0025] The beneficial effects of the technical solution provided in this application include:

[0026] This application provides an energy dissipation device suitable for piers and beams with low clearance. The first energy dissipation unit includes a first sliding plate, and the second energy dissipation unit includes a second sliding plate located below the first sliding plate. The two ends of the elastic damping elements on both sides of the second energy dissipation unit are respectively connected to the first and second energy dissipation units. This allows the elastic damping unit to adjust the gap between the first and second sliding plates by adjusting the distance between its two ends during installation. Furthermore, when the gap is zero, the vertical force between the first and second sliding plates can be adjusted, allowing them to slide together when the gap is zero. Together with the elastic damping unit, this device is used for bridge damping and vibration reduction. Therefore, this energy dissipation device can adjust the gap between the first and second sliding plates according to the actual clearance between the piers and beams, thus adapting to the installation of piers and beams with different clearances, especially low clearances. In addition to the elastic damping unit being used for bridge damping and vibration reduction, the sliding connection of the first and second sliding plates when the gap is zero further assists the elastic damping unit in damping and vibration reduction, improving the applicability while ensuring the damping and vibration reduction effect. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A front view of an energy-consuming device suitable for low-clearance pier beams provided in an embodiment of this application;

[0029] Figure 2A side view of an energy-consuming device for low-clearance pier beams provided in an embodiment of this application;

[0030] Figure 3 A top view of an energy-consuming device for low-clearance pier beams provided in an embodiment of this application;

[0031] Figure 4 A bottom view of an energy-dissipating device for low-clearance pier beams provided in an embodiment of this application.

[0032] Figure 5 A schematic diagram of the structure of an energy-consuming device for low-clearance pier beams provided in an embodiment of this application;

[0033] Figure 6 This is a structural schematic diagram of a bridge provided in an embodiment of this application.

[0034] In the diagram: 1-First energy dissipation unit, 10-First sliding plate, 11-Middle connecting plate, 12-Top seat, 13-Top seat connecting plate, 2-Second energy dissipation unit, 20-Second sliding plate, 21-Support unit, 210-Support plate, 211-Support tie rod, 22-Friction base, 23-Base connecting plate, 3-Elastic damping unit, 30-Elastic damping element, 4-Main beam, 50-Rotating crank, 51-Buffer spring, 52-Support hinge shaft, 6-Pier beam, 7-Foundation structure, 8-Platform body, 9-Seismic isolation device. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] This application provides an energy dissipation device suitable for low-clearance piers and beams, which can solve the problem in related technologies where the isolation layer space of the bridge is insufficient, or the clearance between the main beam and the pier is low, and traditional viscous dampers or metal dampers cannot be used for energy dissipation and vibration reduction in the transverse direction of the bridge in the isolation layer or between the main beam and the pier.

[0037] See Figure 1 and Figure 5As shown, this energy-dissipating device mainly includes a first energy-dissipating unit 1, a second energy-dissipating unit 2, and an elastic damping unit 3. The first energy-dissipating unit 1 is located above the second energy-dissipating unit 2 and is mainly used for connection and fixation to the main beam 4. The first energy-dissipating unit 1 includes a first sliding plate 10. The second energy-dissipating unit 2 is mainly used for connection to the pier beam 6 and includes a second sliding plate 20 located below the first sliding plate 10. The elastic damping unit 3 includes multiple elastic damping elements 30 spaced apart on both sides of the second energy-dissipating unit 2, with each end of the elastic damping element 30... Connected to the first energy dissipation unit 1 and the second energy dissipation unit 2, the elastic damping unit 3 is used to adjust the gap between the first sliding plate 10 and the second sliding plate 20 by adjusting the distance between its two ends during installation. The size of the gap between the first sliding plate 10 and the second sliding plate 20 determines the overall height of the energy dissipation device. Therefore, this energy dissipation device can adjust the gap between the first sliding plate 10 and the second sliding plate 20 according to the actual net height between the bridge piers and beams 6, thereby adapting to the installation of piers and beams 6 with different net heights, especially low net heights, and solving the problem of gaps in the seismic isolation layer of some bridges. When the gap between the main girder 4 and the pier is relatively small, or the clearance between the main girder 4 and the pier is relatively low, traditional viscous dampers or metal dampers cannot be used for energy dissipation and vibration reduction in the transverse direction of the bridge, either in the isolation layer or between the main girder 4 and the pier. Furthermore, the elastic damping element 30, besides adjusting the gap between the first sliding plate 10 and the second sliding plate 20, can also undergo elastic deformation. Its main function is to dampen and reduce vibration of the bridge itself through elastic deformation when the main girder 4 displaces. The elastic damping element 30 is also used in the first sliding plate 10 and the second sliding plate 20. When the gap between the sliding plates 20 is zero, that is, when the first sliding plate 10 and the second sliding plate 20 are in full contact and slidingly connected, the vertical force between the first sliding plate 10 and the second sliding plate 20 is adjusted, thereby adjusting the magnitude of the friction force when the first sliding plate 10 moves relative to the second sliding plate 20 under the drive of the main beam 4. Therefore, the first sliding plate 10 and the second sliding plate 20 are also used together with the elastic damping unit 3 for damping and vibration reduction of the bridge when the gap is zero and the sliding connection is zero, so that the energy dissipation device can improve the scope of application while ensuring the effect of damping and vibration reduction.

[0038] Further, see Figure 1 and Figure 5As shown, the first energy-consuming unit 1 also includes a connecting component, which is mainly used to connect with the main beam 4, and also used to transfer the displacement of the main beam 4 along the transverse direction of the bridge to the first sliding plate 10, and to amplify the displacement by at least one time. Specifically, the connecting component is located above the first sliding plate 10. Its main function is to connect the main beam 4 and the first sliding plate 10. Most importantly, when the main beam 4 of the bridge undergoes lateral displacement due to external factors, the main beam 4 can synchronously drive the first sliding plate 10 to move in the corresponding direction through the connecting component. The connecting component can also amplify the magnitude of the displacement. That is, when the first sliding plate 10 moves, the amount of displacement it moves synchronously is at least greater than the amount of displacement of the main beam 4 along the transverse direction of the bridge. Since bridges generally experience relatively large longitudinal deformation and relatively small transverse deformation under normal use, the metal damping elements currently used in bridges generally have the problem of not being able to play a significant role in energy dissipation and vibration reduction when the transverse deformation is small. The setting of the connecting component can effectively amplify the relative displacement of the bridge along the transverse direction, thereby increasing the movement displacement of the elastic damping element 30, increasing the energy dissipation characteristics of the elastic damping element 30, and reducing the dynamic response of the bridge structure.

[0039] Further, see Figure 2 and Figure 5 As shown, the connecting assembly mainly includes multiple rotating cranks 50 and multiple supporting hinge shafts 52. The multiple rotating cranks 50 are spaced apart below the main beam 4. One end of the rotating crank 50 is connected to the main beam 4, and the other end is connected to the first sliding plate 10. The supporting hinge shafts 52 are passed through the rotating cranks 50, and both ends are connected and fixed to the second energy dissipation unit 2. That is, the supporting hinge shafts 52 can be passed through multiple rotating cranks 50 at the same time, and serve as fixed support points after being connected and fixed to the second energy dissipation unit 2. When the main beam 4 is displaced, the rotating cranks 50 can be used to rotate around the corresponding supporting hinge shaft 52 as a fulcrum under the drive of the main beam 4, thereby driving the first sliding plate 10 at the other end to move laterally along the bridge.

[0040] Further, see Figure 1 and Figure 5 As shown, at least one buffer spring 51 is provided between the rotating crank 50 and the first sliding plate 10. One end of the buffer spring 51 is connected to one of the rotating cranks 50, and the other end is connected to the first sliding plate 10. Specifically, at least one buffer spring 51 is provided between each rotating crank 50 and the first sliding plate 10. The buffer spring 51 is mainly used to provide a buffer force for the first sliding plate 10 during displacement by undergoing tensile and compressive deformation when the main beam 4 moves and the first sliding plate 10 is driven to move by the rotating crank 50. In addition, the deformation of the buffer spring 51 also plays a role in energy dissipation and vibration reduction to a certain extent.

[0041] Further, see Figure 5 As shown, the first energy dissipation unit 1 also includes a central connecting plate 11, which can be a reinforced concrete structure. The central connecting plate 11 is located between the rotating crank 50 and the first sliding plate 10, and is directly connected to the rotating crank 50 and the first sliding plate 10 respectively. The central connecting plate 11 is connected to the end of the buffer spring 51 away from the corresponding rotating crank 50. That is, the end of the rotating crank 50 away from the main beam 4 is connected to the top of the central connecting plate 11. The bottom of the central connecting plate 11 is attached to and fixedly connected to the top of the first sliding plate 10. The two are a whole. When the main beam 4 is displaced, it drives the central connecting plate 11 and the first sliding plate 10 to move as a whole. The two sides of the central connecting plate 11 parallel to the longitudinal direction of the bridge are connected to the upper end of some elastic damping units 3. Therefore, the upper end of the elastic damping units 3 is directly connected to the central connecting plate 11. The distribution of the elastic damping units 3 also enables them to effectively dampen and reduce vibration when the main beam 4 moves laterally along the bridge.

[0042] Further, see Figure 1 and Figure 5 As shown, the second energy dissipation unit 2 also includes at least two sets of support units 21. These two sets of support units 21 are respectively located on both sides of the second energy dissipation unit 2 parallel to the transverse direction of the bridge, meaning the direction of the two sets of support units 21 is perpendicular to the direction of the elastic damping unit 3. Each support unit 21 mainly includes at least one vertically arranged support plate 210. The bottom end of the support plate 210 is connected to the pier beam 6, and the support plate 210 is connected to one end of the support hinge shaft 52 on the same side. Specifically, from a structural design perspective, the support plate 210 has a trapezoidal structure with dimensions gradually increasing from top to bottom. Its bottom end is fixedly connected to the pier beam 6, thus serving as a fixed connecting element for the support hinge shaft 52. In this embodiment, preferably, there are multiple support plates 210 arranged side-by-side. A transversely arranged support rod 211 spans across multiple support plates 210, and the support rod 211 is used to connect and fix multiple support plates 210 on the same side into a single unit.

[0043] Further, see Figure 1 , Figure 2 and Figure 5 As shown, the bottom surface of the first sliding plate 10 is provided with a protrusion, and the top surface of the second sliding plate 20 is provided with a groove that matches the protrusion. Specifically, the radii of curvature of the protrusion and the groove are the same. That is, when there is a gap between the first sliding plate 10 and the second sliding plate 20, the surfaces of the protrusion and the groove are almost parallel. When the gap between the first sliding plate 10 and the second sliding plate 20 is zero, the protrusion can fit completely into the groove. Under the drive of the main beam 4, the protrusion can move relative to the groove along the transverse direction of the bridge, and friction is generated between the two, providing damping and shock absorption for the bridge.

[0044] Furthermore, both the protrusions and the grooves are coated with a friction-enhancing coating. Specifically, the friction coefficient of this coating can be set according to the hysteresis energy consumption index. By adjusting the friction coefficient, the magnitude of friction energy consumption when the first sliding plate 10 and the second sliding plate 20 move relative to each other can be adjusted to adapt to different bridges.

[0045] Furthermore, the elastic damping unit 3 specifically has a frame structure. In this embodiment, preferably, it is integrally molded and made entirely of elastic material, such as mild steel, hard steel, alloy steel, aluminum, composite material, high-damping rubber, etc. The elastic damping unit 3 specifically includes an open end and a closed end. The open end includes an opening, and the size of the open end, i.e., the size of the opening, can be adjusted by deformation. The two ends of the opening at the open end are respectively connected to the first energy dissipation unit 1 and the second energy dissipation unit 2. That is, during installation, the overall height of the energy dissipation device is determined according to the actual net height between the pier beams 6, and then the size of the gap between the first sliding plate 10 and the second sliding plate 20 is determined. Thus, the elastic damping is adjusted according to the parameters determined above. Before installation, component 30 is shaped. Because it deforms after shaping, a restoring force is generated. Therefore, if it is necessary to increase the gap between the first sliding plate 10 and the second sliding plate 20, the two ends of the opening at the open end of the elastic damping element 30 are compressed during installation, reducing the size of the opening. The resulting restoring force along opposite directions will drive the first sliding plate 10 and the second sliding plate 20 away from each other. If it is necessary to reduce the gap between the first sliding plate 10 and the second sliding plate 20, or to increase the force between them, the two ends of the opening at the open end of the elastic damping element 30 are enlarged during installation, increasing the size of the opening. The resulting restoring force along opposite directions will drive the first sliding plate 10 and the second sliding plate 20 closer together. Therefore, by adjusting the shape, material properties, and size parameters of the elastic damping element 30, the damping characteristics of the elastic damping element 30 and the dimensions of the entire energy dissipation device along the height direction can be adjusted. In addition, the shape of the elastic damping element 30 can be varied, such as U-shaped, J-shaped or irregular, but no matter what shape it is, from the perspective of structural design, its top corner is rounded.

[0046] Further, see Figure 3 , Figure 4 and Figure 5As shown, the first energy-consuming unit 1 also includes a top connecting assembly, which specifically includes a top seat 12 and a top seat connecting plate 13. The top seat connecting plate 13 is located above the top seat 12 and has multiple spaced-apart mounting holes. It is directly fixedly connected to the main beam 4 through these mounting holes. The top surface of the top seat 12 is fixedly connected to the top seat connecting plate 13, and the bottom surface is connected to the end of the rotating crank 50 away from the middle connecting plate 11. Similarly, the second energy-consuming unit 2 also includes a bottom connecting assembly, which specifically includes a friction base 22 and a base connecting plate 23. The base connecting plate 23 is located below the friction base 22 and also has multiple spaced-apart mounting holes. It is directly fixedly connected to the pier beam 6 through these mounting holes. The bottom surface of the friction base 22 is fixedly connected to the base connecting plate 23 and the bottom surface is connected to the bottom surface of the second sliding plate 20. In this embodiment, preferably, the lower end of the elastic damping element 30 is connected to both sides of the friction base 22 that are parallel to each other along the longitudinal direction of the bridge.

[0047] This application also provides a bridge, see [link to relevant documentation] Figure 6 As shown, the bridge mainly includes a foundation structure 7, a pier cap 8, a pier beam 6, and a main beam 4 from bottom to top. The main beam 4 is located on the top of the pier beam 6. A seismic isolation device 9 is provided between the pier beam 6 and the main beam 4, and a receiving gap is formed between the pier beam 6 and the main beam 4. At least one of the above-mentioned energy dissipation devices is provided between the pier beam 6 and the main beam 4, that is, within the receiving gap. In this embodiment, preferably, there are multiple energy dissipation devices.

[0048] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0049] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An energy-consuming device suitable for piers and beams with low headroom, characterized in that, It includes: The first energy dissipation unit (1) is used to connect to the main beam (4), and the first energy dissipation unit (1) includes a first sliding plate (10). The second energy dissipation unit (2) is used to connect with the pier beam (6). The second energy dissipation unit (2) includes a second sliding plate (20) located below the first sliding plate (10). An elastic damping unit (3) includes a plurality of elastic damping elements (30) spaced apart on both sides of the second energy dissipation unit (2), wherein the two ends of the elastic damping elements (30) are respectively connected to the first energy dissipation unit (1) and the second energy dissipation unit (2); wherein, The elastic damping unit (3) is used to adjust the gap between the first sliding plate (10) and the second sliding plate (20) by adjusting the distance between its two ends when they are installed. The elastic damping element (30) is also used to adjust the vertical force between the first sliding plate (10) and the second sliding plate (20) when the gap is zero. The first sliding plate (10) and the second sliding plate (20) are used to slide together when the gap is zero, so as to work together with the elastic damping unit (3) for damping and shock absorption. The first energy-consuming unit (1) further includes a connecting component, which is used to connect with the main beam (4), and is also used to transmit the displacement of the main beam (4) along the transverse direction of the bridge to the first sliding plate (10), and to amplify the displacement by at least one time. The connection component includes: Multiple rotating cranks (50), one end of which is connected to the main beam (4) and the other end is connected to the first sliding plate (10); Multiple support hinge shafts (52) are provided, which are mounted on the rotating crank (50) and both ends are connected and fixed to the second energy-consuming unit (2); wherein, The rotating crank (50) is used to rotate about the corresponding support hinge shaft (52) under the drive of the main beam (4) to drive the first sliding plate (10) to move laterally along the bridge.

2. The energy-consuming device for low-clearance pier beams as described in claim 1, characterized in that: At least one buffer spring (51) is provided between the rotating crank (50) and the first sliding plate (10). One end of the buffer spring (51) is connected to one of the rotating cranks (50), and the other end is connected to the first sliding plate (10).

3. The energy-consuming device for low-clearance pier beams as described in claim 2, characterized in that: The first energy-consuming unit (1) further includes a central connecting plate (11), which is located between the rotating crank (50) and the first sliding plate (10) and is connected to the rotating crank (50) and the first sliding plate (10) respectively. The central connecting plate (11) is connected to the end of the buffer spring (51) away from the corresponding rotating crank (50). The two sides of the central connecting plate (11) parallel to the longitudinal direction of the bridge are connected to the upper end of part of the elastic damping unit (3).

4. The energy-consuming device for low-clearance pier beams as described in claim 1, characterized in that: The second energy-consuming unit (2) also includes at least two sets of support units (21). The at least two sets of support units (21) are respectively located on both sides of the second energy-consuming unit (2) and the bridge in the transverse direction. The support unit (21) includes at least one vertically arranged support plate (210). The bottom end of the support plate (210) is used to connect with the pier beam (6). The support plate (210) is connected to one end of the support hinge shaft (52) on the same side.

5. The energy-consuming device for low-clearance pier beams as described in claim 1, characterized in that: The bottom surface of the first sliding plate (10) is provided with a protrusion, and the top surface of the second sliding plate (20) is provided with a groove that matches the protrusion.

6. The energy-consuming device for low-clearance pier beams as described in claim 5, characterized in that: Both the protrusions and the grooves are coated with a friction-enhancing coating.

7. The energy-consuming device for low-clearance pier beams as described in claim 1, characterized in that: The elastic damping element (30) has a frame structure. The elastic damping element (30) includes an open end and a closed end. The size of the open end is adjustable, and the two ends of the open end are respectively connected to the first energy dissipation unit (1) and the second energy dissipation unit (2).

8. A bridge, characterized in that, It includes: Pier beam (6), the top of which is provided with a main beam (4); At least one energy-consuming device as described in claim 1, wherein the energy-consuming device is disposed between the pier beam (6) and the main beam (4).

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