Anti-seismic reinforcing device for bridge stop block and bridge

Abstract

The invention relates to the technical field of bridge seismic resistance, and provides an anti-seismic reinforcing device for a bridge check block and a bridge. The anti-seismic reinforcing device for the bridge check block comprises an upper connecting plate and a lower connecting plate which are arranged at intervals, and the upper connecting plate is used for being connected with the check block; the lower connecting plate is used for being connected with a bent cap. The limiting energy dissipation component comprises a first arc-shaped plate and a second arc-shaped plate, and the two ends of the first arc-shaped plate are connected with the upper connecting plate and the lower connecting plate correspondingly; one end of the second arc-shaped plate is connected to the inner side of the first arc-shaped plate, and the other end of the second arc-shaped plate is connected with the lower connecting plate; the end, connected with the lower connecting plate, of the second arc-shaped plate is located between the two ends of the first arc-shaped plate. The technical problem that in the prior art, a reinforced concrete stop block is prone to brittle shear failure during an earthquake, and consequently transverse earthquake damage of a bridge is caused can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge earthquake resistance, and in particular to an earthquake resistance reinforcement device for a bridge stopper and a bridge. Background Art

[0003] Combining the relevant provisions of the current "Bridge Seismic Design Code" (JTG / TB02-01-2008) and "Highway Engineering Seismic Code" (JTGB02-2013), we can find that:

[0004] First of all, the role of reinforced concrete blocks in existing old bridges has not been correctly understood, nor has it received due attention. Its functional positioning, seismic performance, structural details and even design methods are almost blank, which leads to its unsatisfactory limiting function, further causing serious lateral earthquake damage to bridges. For a long time, the seismic design of bridges has focused on the lower structures such as piers, and the piers are designed as ductile components, using their elastic-plastic deformation under earthquakes to dissipate energy to resist seismic loads. The research focus at home and abroad is also mostly on how to improve the ductility of piers, how to clarify the performance indicators and damage levels of piers, etc. However, for bridges with seismic isolation bearings, the seismic damage to the lower structures such as piers is very slight, or even no damage occurs at all, and the lateral earthquake damage is caused by the inconspicuous reinforced concrete blocks, which cannot but cause reflection in the engineering community.

[0005] Secondly, the lack of reasonable seismic analysis methods is also one of the causes of serious earthquake damage to bridges, especially the lack of correct simulation methods for force transmission and limiting components such as reinforced concrete blocks. For example, many current seismic analyses simulate blocks as linear springs with infinite stiffness, and even believe that the blocks can completely limit the displacement of the main beam and apply the lateral consolidation constraint method to the lateral side of the main beam, without considering the real mechanical model of the reinforced concrete block and the possible damage during the earthquake. The earthquake damage phenomenon of the block has proved that these simulation methods are far from the actual situation. The difference between the analysis of this simulation and the actual situation is very likely to lead to inaccurate or even wrong analysis results and the corresponding seismic design process. Of course, this is also related to the lack of widely accepted and easy-to-implement analysis models for reinforced concrete blocks at home and abroad. It can be seen that research on the seismic performance of blocks is imperative.

[0006] Finally, the earthquake damage phenomenon shows that under the previous structural reinforcement method of bridge blocks, the blocks were almost all mainly destroyed by brittle shear, with low strength and poor deformation capacity. Therefore, it is urgent to develop a device that can improve the seismic performance of reinforced concrete blocks. Summary of the invention

[0007] The purpose of the present invention is to overcome the technical problem in the prior art that reinforced concrete blocks are prone to brittle shear failure during earthquakes, thereby causing lateral earthquake damage to bridges, and to provide an earthquake-resistant reinforcement device for bridge blocks and a bridge.

[0008] In a first aspect, the present invention provides a seismic reinforcement device for a bridge block, comprising:

[0009] An upper connecting plate and a lower connecting plate are arranged at intervals, wherein the upper connecting plate is used to connect with the stopper; and the lower connecting plate is used to connect with the cap beam;

[0010] The position-limiting energy-absorbing component comprises a first arc-shaped plate and a second arc-shaped plate, and two ends of the first arc-shaped plate are respectively connected to the upper connecting plate and the lower connecting plate;

[0011] One end of the second arc plate is connected to the inner side of the first arc plate, and the other end of the second arc plate is connected to the lower connecting plate; the end of the second arc plate connected to the lower connecting plate is located between the two ends of the first arc plate.

[0012] The anti-seismic reinforcement device for bridge blocks of this scheme forms three ends arranged in sequence from top to bottom by a first arc-shaped plate and a second arc-shaped plate connected to each other. When in use, the upper connecting plate is connected to the block, so that the upper end of the first arc-shaped plate is connected to the block; the lower connecting plate is connected to the cap beam, and it is ensured that the lower connecting plate covers the boundary line between the block and the cap beam, so that the lower end of the first arc-shaped plate and the end of the second arc-shaped plate away from the first arc-shaped plate are respectively connected to the cap beam and the boundary line between the block and the cap beam; when the bridge is in normal operation, this scheme has no effect on the bridge; and when a strong earthquake occurs and causes relative vibration between the bridge pier and the main beam When the first curved plate is deformed and the deformation value exceeds the initial gap between the stopper and the main beam, the main beam will hit the stopper and cause the stopper to bend and deform in the direction away from the main beam, and the closer to the top of the stopper, the greater the deformation, thereby causing the first curved plate to compress and deform along its length, and driving the second curved plate connected to it to compress and deform along its length; on the one hand, the first curved plate and the second curved plate can generate a reaction force in the opposite direction of the compression deformation to suppress the deformation and displacement of the stopper, and on the other hand, the mechanical energy of the impact can be dissipated through compression deformation, thereby enhancing the limiting ability and energy dissipation capacity of the stopper.

[0013] Furthermore, when the block is hit by the main beam, the root of the block, that is, the connection between the block and the cap beam, is subjected to the largest bending moment, which makes the connection between the block and the cap beam most likely to crack; in the present scheme, part of the impact force generated by the main beam hitting the block will bypass the block through the first arc plate and be transmitted directly to the cap beam, while the other part will be transmitted back to the lower part of the block through the second arc plate in the opposite direction (relative to the impact direction of the main beam), thereby offsetting part of the impact force on the lower part of the block; in summary, the synergistic effect of the first arc plate and the second arc plate can greatly reduce the impact damage of the main beam on the block, prevent the block from brittle failure, and thus prevent the occurrence of earthquake damage such as falling beams and improve the seismic performance of the bridge.

[0014] As mentioned above, this solution can be directly installed on existing reinforced concrete blocks and improve the seismic performance of the blocks by changing the force transmission mechanism of the blocks without the need for heavy renovation work such as dismantling and re-pouring the blocks. Therefore, this solution is also particularly suitable for seismic reinforcement and renovation of existing reinforced concrete blocks and has good promotion prospects.

[0015] Preferably, the number of the position-limiting and energy-absorbing components is greater than one, and the position-limiting and energy-absorbing components are distributed at intervals along the normal direction of the first arc-shaped plate.

[0016] This solution increases the number of limiting energy-consuming components, and can further enhance the limiting capacity and energy-consuming capacity of the stopper.

[0017] Preferably, two adjacent position-limiting and energy-absorbing components are connected to each other via a transverse connecting member.

[0018] This solution can ensure that two adjacent limiting energy-absorbing components can deform cooperatively, thereby jointly participating in the limiting work of the block and the energy consumption of the impact mechanical energy, avoiding the situation where the different deformation amounts of the various limiting energy-absorbing components are different due to the different deformation amounts of the various parts of the block, or even some of the limiting energy-absorbing components do not work, resulting in the limitation of the limiting function and the energy consumption function.

[0019] Preferably, the transverse connecting member comprises a third curved plate, and a bending direction of the third curved plate matches that of the first curved plate.

[0020] In this solution, the transverse connecting member includes a third curved plate that matches the first curved plate. Not only can the third curved plate help the two adjacent first curved plates to deform collaboratively, but the third curved plate itself can also deform together with the first curved plates, thereby participating in the deformation energy dissipation work together with the first curved plates and enhancing the energy dissipation capacity of the limiting energy dissipation component.

[0021] Preferably, the transverse connecting member is connected to the middle portion of the first arc-shaped plate.

[0022] Since the two ends of each first curved plate are respectively connected to the upper connecting plate and the lower connecting plate, the two ends of each first curved plate can be deformed cooperatively under the limitation of the upper connecting plate and the lower connecting plate, while it is mainly the middle part of each first curved plate that is prone to non-cooperative deformation; therefore, this scheme chooses to connect the transverse connecting member to the middle part of the first curved plate, which has the highest structural efficiency and can achieve coordinated deformation of each first curved plate with the least components.

[0023] Preferably, a local stiffening rib is provided at a connection between the first arc-shaped plate and the upper connecting plate, and / or a local stiffening rib is provided at a connection between the first arc-shaped plate and the lower connecting plate.

[0024] This solution can increase the connection stability between the first curved plate and the upper connecting plate, and between the first curved plate and the lower connecting plate, and avoid local buckling at both ends of the first curved plate resulting in failure of force transmission, thereby causing failure of this solution.

[0025] Preferably, the cross-sectional dimensions of the first arc-shaped plate gradually decrease from both ends to the middle.

[0026] From the force analysis of the first curved plate, it can be seen that the bending moment at the two ends of the first curved plate is the largest, while the bending moment in the middle is smaller. Therefore, this scheme correspondingly sets the first curved plate to have a shape with larger ends and smaller middle, which has higher structural efficiency. Compared with structures with equal cross-sectional dimensions, this scheme can achieve the same force performance with less material consumption.

[0027] Preferably, the cross-sectional size of the second arc-shaped plate gradually increases from an end close to the first arc-shaped plate to an end close to the lower connecting plate.

[0028] From the force analysis of the second curved plate, it can be seen that the bending moment is the largest at the end of the second curved plate close to the lower connecting plate, while the bending moment is smaller at the end close to the first curved plate. Therefore, this scheme correspondingly sets the second curved plate to have a shape with one end larger and the other end smaller, which has higher structural efficiency. Compared with structures with equal cross-sectional dimensions, this scheme can achieve the same force performance with less material consumption.

[0029] In a second aspect, the present invention provides a bridge, including a stopper and a cap beam, and also includes an anti-seismic reinforcement device for the bridge stopper of the present invention.

[0030] The bridge of this scheme is installed with the seismic reinforcement device for the bridge block of the present invention, which can limit the deformation and displacement of the block through the limiting energy-absorbing component when a strong earthquake causes the main beam to hit the block, and transmit part of the impact force to the cap beam and the other part of the impact force back to the lower part of the block, thereby greatly reducing the stress inside the block and reducing the possibility of shear brittle failure of the block. Compared with the existing technology, it has higher safety and seismic resistance.

[0031] Preferably, the upper connecting plate is connected to the stopper by chemical bolts, and the lower connecting plate is connected to the cap beam by chemical bolts.

[0032] This solution recommends a specific connection method between the upper connecting plate and the stopper, and between the lower connecting plate and the cap beam, which has the advantages of simple installation and convenient replacement.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The present invention provides an anti-seismic reinforcement device for a bridge block, which connects a limiting energy-absorbing component including a first arc plate and a second arc plate between the block and the cap beam. When the main beam hits the block, the limiting energy-absorbing component can generate a reaction force and dissipate the mechanical energy of the impact through the deformation of the limiting energy-absorbing component, thereby playing a limiting and energy-absorbing role; and the impact force can be transmitted to the cap beam and back to the lower part of the block through the first arc plate and the second arc plate respectively, thereby improving the force on the block and preventing the block from failing due to brittle damage. Compared with the prior art, the device has higher safety, can better prevent the occurrence of earthquake damage such as falling beams and improve the anti-seismic performance of bridges; and the present invention can be easily installed, is particularly suitable for the anti-seismic reinforcement and transformation of existing reinforced concrete blocks, and has good promotion prospects.

[0035] 2. The present invention provides a bridge which can limit the deformation and displacement of the block by means of a limiting energy-absorbing component when a strong earthquake causes the main beam to hit the block, and transmit part of the impact force to the cap beam and the other part of the impact force back to the lower part of the block, thereby greatly reducing the stress inside the block and the possibility of shear brittle failure of the block. Compared with the prior art, the bridge has higher safety and seismic resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the main structure of a seismic reinforcement device for a bridge stopper of the present invention when it is installed on a bridge;

[0037] Figure 2 yes Figure 1 The local enlarged structure diagram of the part Ⅰ in the middle Figure 1 ;

[0038] Figure 3 yes Figure 1 The local enlarged structure diagram of the part Ⅰ in the middle Figure 2 ;

[0039] Figure 4 It is a side structural schematic diagram of a seismic reinforcement device for a bridge block of the present invention;

[0040] Figure 5 It is a three-dimensional structural schematic diagram of a seismic reinforcement device for a bridge block of the present invention;

[0041] Figure 6It is a three-dimensional structural schematic diagram of a position-limiting energy-absorbing component in a seismic reinforcement device for a bridge stopper of the present invention;

[0042] Figure 7 It is a schematic diagram of the main structure of a position-limiting energy-absorbing component in a seismic reinforcement device for a bridge stopper of the present invention;

[0043] icon:

[0044] 1- Upper connecting plate;

[0045] 2-Lower connecting plate;

[0046] 3-limiting energy-absorbing member; 31-first arc plate; 32-second arc plate; 33-third arc plate; 34-local stiffening rib;

[0047] 4-Block; 5-Cap beam. DETAILED DESCRIPTION

[0048] The present invention is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0049] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0050] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0051] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0052] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0053] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0054] Example 1

[0055] like Figures 1 to 7 As shown, a seismic reinforcement device for a bridge block comprises an upper connecting plate 1, a lower connecting plate 2 and a limiting energy-absorbing component 3; the upper connecting plate 1 and the lower connecting plate 2 are spaced apart in the height direction, the upper connecting plate 1 is used to connect with the block 4; the lower connecting plate 2 is used to connect with the cap beam 5; the limiting energy-absorbing component 3 comprises a first arc plate 31 and a second arc plate 32; the two ends of the first arc plate 31 are respectively connected to the upper connecting plate 1 and the lower connecting plate 2; one end of the second arc plate 32 is connected to the inner side of the first arc plate 31, and the end of the second arc plate 32 connected to the lower connecting plate 2 is located between the two ends of the first arc plate 31.

[0056] exist Figures 1 to 7 middle, Figure 2 , Figure 3 and Figure 5 The middle dotted line represents the boundary line between the stopper 4 and the cap beam 5; Figure 7 In order to conveniently display the dimensions of each part of the first curved plate 31 and the second curved plate 32, the third curved plate 33 and the local stiffening ribs 34 are hidden.

[0057] In the above embodiment, the inner side of the first curved plate 31, that is, when the bridge block is connected to the bridge by the seismic reinforcement device, the first curved plate 31 faces the side of the block 4 or the cap beam 5; the end of the second curved plate 32 connected to the lower connecting plate 2 is located between the two ends of the first curved plate 31, for example Figure 2 As shown, the end of the second arc-shaped plate 32 connected to the lower connecting plate 2 is located between the two ends of the first arc-shaped plate 31 along the height direction.

[0058] In the above embodiment, the connection method between the upper connecting plate 1 and the block 4 includes but is not limited to: an embedded steel structure is set in the block 4, and the upper connecting plate 1 is connected to the embedded steel structure through a threaded connection, or the upper connecting plate 1 is directly welded to the embedded steel structure; a mounting hole is set on the upper connecting plate 1, and an anchor bolt is driven into the block 4 through the mounting hole, so as to connect the upper connecting plate 1 and the block 4 together; the connection method between the lower connecting plate 2 and the cap beam 5, and the connection method between the lower connecting plate 2 and the block 4 in the subsequent content are similar, including but not limited to connection through threaded connections, connection through anchor bolts, and welding.

[0059] In the above embodiment, the first curved plate 31 and the second curved plate 32 can be either two independent components connected to each other or two parts of an integrated component; the specific curve equations of the first curved plate 31 and the second curved plate 32 include but are not limited to elliptic curve equations and quadratic parabola equations; and the first curved plate 31 can use curve equations with different parameters or different types on the side close to the bridge and the side away from the bridge to achieve a variable cross-section effect; the second curved plate 32 can also use curve equations with different parameters or different types on both sides; the specific connection position and specific bending direction of the second curved plate 32 on the first curved plate 31 depend on the size of the stopper 4 and the cap beam 5, as well as the structure of the first connecting plate 1 and the second connecting plate 2, as long as the load can be transmitted from the upper part of the stopper 4 back to the lower part of the stopper 4; for example Figures 2 to 3 As shown, one end of the second arc plate 32 is connected to the portion of the first arc plate 31 located above the boundary line between the stopper 4 and the cap beam 5, and the other end extends along a curve with the center above the boundary line between the stopper 4 and the cap beam 5 to the boundary line between the stopper 4 and the cap beam 5.

[0060] In an optional embodiment, the number of the position-limiting energy-consuming components 3 is greater than one, and the position-limiting energy-consuming components 3 are spaced apart along the normal direction of the first curved plate 31 (parallel to the longitudinal direction of the bridge when installed on the bridge). The specific number of the position-limiting energy-consuming components is determined according to the actual position-limiting and energy-consuming requirements. The higher the position-limiting and energy-consuming requirements, the more the number of the position-limiting energy-consuming components 3 can be.

[0061] In an optional implementation manner, two adjacent position-limiting and energy-absorbing components 3 are connected to each other via a transverse connecting member.

[0062] In an optional embodiment, the transverse connecting member is connected to the middle part of the first arc-shaped plate 31. The specific structural form of the transverse connecting member includes but is not limited to a connecting rod and a connecting plate.

[0063] In an optional embodiment, the transverse connecting member includes a third curved plate 33, and the bending direction of the third curved plate 33 matches the first curved plate 31, for example Figure 2 and Figure 3 As shown, the edges of the first curved plate 31 close to the bridge and away from the bridge are substantially parallel to the corresponding edges of the first curved plate 31 .

[0064] In an optional embodiment, a local stiffening rib 34 is provided at the connection between the first curved plate 31 and the upper connecting plate 1, and / or a local stiffening rib 34 is provided at the connection between the first curved plate 31 and the lower connecting plate 2; the plate surface of the local stiffening rib 34 can be provided perpendicular to the first curved plate 31, and at least one local stiffening rib 34 can be provided on both sides of the first curved plate 31 along the normal direction of the first curved plate 31; when the number of first curved plates 31 is greater than one, the local stiffening ribs 34 of two adjacent first curved plates 31 can also be connected to each other, thereby also playing a role in helping the two adjacent first curved plates 31 to deform cooperatively.

[0065] In an optional embodiment, the cross-sectional dimensions of the first curved plate 31 gradually decrease from both ends to the middle. It should be noted that the cross-sectional dimensions here refer to the dimensions perpendicular to the arc line of the first curved plate 31, for example Figure 7 As shown, the cross-sectional dimensions H1 and H2 at the two ends of the first arc-shaped plate 31 are both larger than the cross-sectional dimension H3 of the middle portion of the first arc-shaped plate 31 .

[0066] In an optional embodiment, the cross-sectional dimensions of the second curved plate 32 gradually increase from the end close to the first curved plate 31 to the end close to the lower connecting plate 2. It should be noted that the cross-sectional dimensions here refer to the dimensions perpendicular to the arc line of the second curved plate 32, for example Figure 7 As shown, the cross-sectional dimensions of the two ends of the second arc-shaped plate 32 are H4 and H5 respectively, and H4 is larger than H5.

[0067] In an optional embodiment, the plate surface of the first curved plate 31 is perpendicular to the plate surface of the upper connecting plate 1, and / or, the plate surface of the second curved plate 32 is perpendicular to the plate surface of the upper connecting plate 1. When the impact force is transmitted to the cap beam 5 and the lower part of the stopper 4, the load transfer occurs mainly in the plane parallel to the transverse bridge direction and the vertical direction in the limiting energy-absorbing component 3. Therefore, in this embodiment, the first curved plate 31 and / or the second curved plate 32 are arranged perpendicular to the connecting plate, so that the larger length and width dimensions of the first curved plate 31 and / or the second curved plate 32 are located parallel to the plane where the load transfer occurs, and the smaller thickness dimension is perpendicular to the plane where the load transfer occurs, so that the larger length and width dimensions of the first curved plate 31 and / or the second curved plate 32 can be fully utilized to bear the load, and have higher structural efficiency.

[0068] Example 2

[0069] like Figure 1 As shown, a bridge includes a stopper 4 and a cap beam 5, and also includes an anti-seismic reinforcement device for a bridge stopper in Example 1; the upper connecting plate 1 is connected to the stopper 4, the lower connecting plate 2 is connected to the cap beam 5, and the lower connecting plate 2 extends in the direction of the upper connecting plate 1 until it covers the boundary line between the stopper 4 and the cap beam 5; so that it can be as shown in Figure 2 and Figure 3 As shown, the second arc plate 32 is connected exactly to the boundary line between the stopper 4 and the cap beam 5.

[0070] In an optional embodiment, the upper connecting plate 1 is connected to the stopper 4 via chemical bolts, and the lower connecting plate 2 is also connected to the cap beam 5 and the stopper 4 via chemical bolts, respectively.

[0071] In an optional embodiment, at least two groups of chemical bolts are arranged on the lower connecting plate 2 , wherein at least one group of chemical bolts passes through the lower connecting plate 2 to be connected to the cap beam 5 , and at least one group of chemical bolts passes through the lower connecting plate 2 to be connected to the stopper 4 .

[0072] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seismic reinforcement device for a bridge block, characterized in that: include: An upper connecting plate (1) and a lower connecting plate (2) are arranged at intervals, wherein the upper connecting plate (1) is used to connect to a stopper (4); and the lower connecting plate (2) is used to connect to a cap beam (5); A position-limiting energy-absorbing component (3), the position-limiting energy-absorbing component (3) comprising a first arc-shaped plate (31) and a second arc-shaped plate (32), wherein two ends of the first arc-shaped plate (31) are respectively connected to the upper connecting plate (1) and the lower connecting plate (2); One end of the second arc-shaped plate (32) is connected to the inner side of the first arc-shaped plate (31), and the other end of the second arc-shaped plate (32) is connected to the lower connecting plate (2); the end of the second arc-shaped plate (32) connected to the lower connecting plate (2) is located between the two ends of the first arc-shaped plate (31).

2. The seismic reinforcement device for a bridge stopper according to claim 1, characterized in that: The number of the position-limiting and energy-absorbing components (3) is greater than one, and the position-limiting and energy-absorbing components (3) are distributed at intervals along the normal direction of the first arc-shaped plate (31).

3. The seismic reinforcement device for a bridge block according to claim 2, characterized in that: Two adjacent position-limiting energy-absorbing components (3) are connected to each other via a transverse connecting piece.

4. The seismic reinforcement device for a bridge stopper according to claim 3, characterized in that: The transverse connecting member comprises a third curved plate (33), and the bending direction of the third curved plate (33) matches that of the first curved plate (31).

5. The seismic reinforcement device for bridge block according to claim 3, characterized in that: The transverse connecting member is connected to the middle portion of the first arc-shaped plate (31).

6. The seismic reinforcement device for a bridge block according to claim 1, characterized in that: A local stiffening rib (34) is provided at the connection between the first arc-shaped plate (31) and the upper connecting plate (1), and / or a local stiffening rib (34) is provided at the connection between the first arc-shaped plate (31) and the lower connecting plate (2).

7. A seismic reinforcement device for a bridge block according to any one of claims 1 to 6, characterized in that: The cross-sectional dimensions of the first arc-shaped plate (31) gradually decrease from both ends to the middle.

8. A seismic reinforcement device for a bridge block according to any one of claims 1 to 6, characterized in that: The cross-sectional dimensions of the second arc-shaped plate (32) gradually increase from an end close to the first arc-shaped plate (31) to an end close to the lower connecting plate (2).

9. A bridge, comprising a stopper (4) and a cap beam (5), characterized in that: It also includes an anti-seismic reinforcement device for a bridge block as described in any one of claims 1 to 8.

10. A bridge according to claim 9, characterized in that: The upper connecting plate (1) is connected to the stopper (4) via chemical bolts, and / or the lower connecting plate (2) is connected to the cap beam (5) and the stopper (4) via chemical bolts.

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