Anti-seismic reinforcing device for existing bridge and bridge

Abstract

The utility model relates to the technical field of bridge anti-seismic reinforcing structures, and provides an existing bridge anti-seismic reinforcing device and a bridge, the existing bridge anti-seismic reinforcing device comprises a first connecting seat and a second connecting seat, one of the first connecting seat and the second connecting seat is used for connecting a check block; the other one of the first connecting seat and the second connecting seat is used for connecting a main beam; the energy consumption buffering component is arranged between the first connecting base and the second connecting base, the energy consumption buffering component comprises at least two deformation units, the deformation units are distributed in the longitudinal direction of the energy consumption buffering component, and the first connecting base is close to the second connecting base and can drive the deformation units to generate compression deformation in the longitudinal direction of the energy consumption buffering component. The technical problems that in the prior art, after being impacted by a main beam, a stop block is prone to brittle shear failure, and beam falling earthquake damage cannot be effectively prevented can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge seismic reinforcement structure technical field, especially a kind of bridge seismic reinforcement device and bridge of existing bridge. BACKGROUND

[0002] Reinforced concrete block is the key structure of highway bridge anti-falling beam measure, mainly used to prevent the relative displacement of main beam and pier under the action of earthquake too large and lead to falling beam earthquake damage, play the role of anti-falling beam.Therefore, concrete block is generally used as anti-falling beam measure in highway bridge engineering in seismic intensity area.

[0003] But from Wenchuan earthquake, Maduo earthquake and other previous earthquake disasters, block earthquake damage is very common, according to incomplete statistics, nearly 30% of bridges in earthquake damage appear block damage or failure, which is also the main reason of falling beam, so it is necessary to study the influence of block on bridge seismic performance.Domestic and foreign scholars have done a lot of research on the influence of reinforced concrete block on bridge seismic performance.GOEL et al. studied the law of abutment block on seismic response of cross-fault bridge, analyzed the limiting effect of block on bridge under non-uniform excitation;Wang Yi et al. analyzed and discussed the influence of reinforced concrete block on lateral seismic response of three-span equal-height continuous beam;Sun Ronghui et al. studied the influence of different block design strength on the vulnerability of key components of Xinfangzi Bridge in Wenchuan earthquake.Rao Jiaqi took the typical 3x20m continuous T beam in Yunnan Province as the research object, and carried out the influence of reinforced concrete block on seismic vulnerability of bridge with different pier height.In addition, the calculation formula of concrete block strength is given in Caltarans specification and SCDOT specification of the United States;Japan specification proposes to design block strength according to 1.5 times bearing reaction;China Highway Bridge Seismic Design Specification does not give the specific design method of reinforced concrete block;Railway Engineering Seismic Design Specification gives the specific design method of steel block anti-falling beam device, but it cannot be directly applied to the design of reinforced concrete block.In the design process of reinforced concrete block, the design is usually based on the experience of the past, without in-depth research on the value method, and different seismic intensity area bridges sometimes use the same set of design parameters, which is very unreasonable.

[0004] In addition, highway bridge concrete block is not a ductile component, and the block is designed by strength, without ductile deformation capacity, so it cannot dissipate seismic energy by itself deformation after earthquake.If the reinforcement ratio of reinforced concrete is low, brittle shear failure of main beam hitting block is easy to occur, so it cannot prevent falling beam.

[0005] On the one hand, many bridges cannot meet the existing seismic design specifications because the bridges are early in operation time, and the design of the concrete block cannot meet the limiting requirements. Therefore, in the high-intensity earthquake area of the existing bridge, it is urgent to improve the seismic performance of the concrete block, improve the capacity of limiting and shock absorption, and prevent the bridge from falling beam damage. Content of the utility model

[0006] The utility model discloses a kind of existing bridge seismic reinforcement devices and bridges to overcome the technical problems that brittle shear failure of block is easily occurred after being impacted by main beam in prior art, cannot effectively prevent beam damage.

[0007] In the first aspect, the utility model provides a kind of existing bridge seismic reinforcement device, comprising:

[0008] One of first connecting seat and second connecting seat is used to connect block;The other of first connecting seat and second connecting seat is used to connect main beam;

[0009] Energy dissipation buffer component, energy dissipation buffer component is set between first connecting seat and second connecting seat, energy dissipation buffer component includes at least two deformation units, deformation unit is distributed along the longitudinal direction of energy dissipation buffer component, first connecting seat is close to second connecting seat and can drive deformation unit to compress deformation along the longitudinal direction of energy dissipation buffer component.

[0010] The existing bridge seismic reinforcement device of the scheme is installed between main beam and block when working, wherein one of first connecting seat and second connecting seat is connected to block, and the other is connected to main beam, for example, first connecting seat is connected to block, and second connecting seat is connected to main beam, or vice versa, second connecting seat is connected to block, and first connecting seat is connected to main beam, then the longitudinal direction of energy dissipation buffer component is along the transverse bridge direction;When main beam is close to block under the action of external disturbance, such as earthquake, each deformation unit in energy dissipation buffer component can compress deformation, which can dissipate the mechanical energy of external disturbance into internal energy of energy dissipation buffer component on the one hand, and also can play the role of buffer on the other hand, prevent main beam from directly impacting block, convert the instantaneous high-intensity impact load transmitted from main beam to block into load with longer time, but more smooth change and lower peak value, thereby preventing block from shear failure under instantaneous high-intensity impact load, and improving the reliability of block.

[0011] Preferably, one end of energy dissipation buffer component is connected with first connecting seat, and the other end of energy dissipation buffer component has gap with second connecting seat.

[0012] The gap between the energy dissipation buffer component and the second connecting seat is provided, if the relative moving distance between the main beam and the block is less than the gap, the energy dissipation buffer component will not be compressed and deformed, only when the relative moving distance between the main beam and the block is greater than the gap, the energy dissipation buffer component will be compressed and deformed, the gap is designed according to the use requirement, so that the energy dissipation buffer component only works in the specified situation, and does not work in the remaining situation, thereby prolonging the service life of the energy dissipation buffer component.

[0013] Preferably, the energy dissipation buffer component is connected with a first stopper at one end close to the second connecting seat, the second connecting seat is connected with a second stopper, the second stopper is located at the side of the first stopper close to the first connecting seat, and the first connecting seat drives the first stopper to abut against the second stopper away from the second connecting seat.

[0014] The energy dissipation buffer component can be compressed and deformed when the first connecting seat is close to the second connecting seat, and can be stretched through the abutment of the first stopper and the second stopper when the first connecting seat is away from the second connecting seat, so that the elastic element can work when the main beam is close to the block and can work when the main beam is away from the block, when the main beam is installed on both sides of the scheme and the main beam is relatively displaced relative to the pier, the main beam is close to the block on one side and away from the block on the other side, so that the energy dissipation buffer component on one side is compressed and the energy dissipation buffer component on the other side is stretched, so that the energy dissipation buffer components on both sides of the main beam can participate in the displacement control and mechanical energy dissipation of the main beam, compared with the prior art which can only control the displacement of the main beam through unilateral abutment, the scheme has higher displacement control and mechanical energy dissipation capacity.

[0015] Preferably, the first stopper and the second stopper have a gap therebetween.

[0016] The first stopper and the second stopper have a gap therebetween, if the relative moving distance between the main beam and the block is less than the gap, the energy dissipation buffer component will not be stretched and deformed, only when the relative moving distance between the main beam and the block is greater than the gap, the energy dissipation buffer component will be stretched and deformed, the gap is designed according to the use requirement, so that the energy dissipation buffer component only works in the specified situation, and does not work in the remaining situation, thereby prolonging the service life of the energy dissipation buffer component.

[0017] Preferably, the energy dissipation buffer component is provided with a pad at one end close to the second connecting seat, and the pad is used for abutting against the second connecting seat.

[0018] The scheme can make the load transmission between the second connecting seat and the energy dissipation buffer component more uniform, prevent local excessive stress, and prevent the damage of the second connecting seat and the energy dissipation buffer component.

[0019] Preferably, the deformation unit includes at least one of a cylindrical component, a ring-shaped component, an elliptical component and a wave-shaped component.

[0020] The scheme recommends four specific deformation unit structure forms.

[0021] In the second aspect, the utility model provides a bridge, including main girder and fender, be provided with the utility model of a kind of existing bridge anti-seismic reinforcement device between main girder and fender.

[0022] The bridge of the scheme uses the existing bridge anti-seismic reinforcement device of the utility model, when main girder is close to fender under the action of earthquake, the instantaneous high-strength impact load between main girder and fender can be converted into the load of longer time, but more smooth change and lower peak, and finally be converted into the internal energy of energy dissipation buffer component and be dissipated, to prevent the shear failure of fender under instantaneous high-strength impact load, and further avoid the beam falling earthquake damage.

[0023] Preferably, mounting hole is provided on the fender, and part of the energy dissipation buffer component is located in the mounting hole.

[0024] The scheme sets mounting hole on fender for accommodating energy dissipation buffer component, which can expand the available installation space of energy dissipation buffer component, and is conducive to installing longer energy dissipation buffer component to improve the damping and buffering effect under the condition that the spacing between main girder and fender remains unchanged, and therefore is especially suitable for reinforcing the existing bridge structure with insufficient spacing between main girder and fender.

[0025] Preferably, the mounting hole penetrates the fender along the transverse direction of the bridge, and the first connecting seat is connected to the side of the fender away from the main girder.

[0026] The scheme can maximize the available installation space of energy dissipation buffer component.

[0027] Preferably, the two sides of the main girder along the transverse direction of the bridge are each provided with a fender and a corresponding existing bridge anti-seismic reinforcement device.

[0028] The scheme can provide anti-beam-falling protection for both sides of the main girder along the transverse direction of the bridge, and when the first stopper is provided on the energy dissipation buffer component and the second stopper is provided on the second connecting seat, the existing bridge anti-seismic reinforcement devices on the left and right sides can cooperatively participate in the displacement control and mechanical energy dissipation of the main girder, thereby better ensuring the safety of the main girder under the action of earthquake.

[0029] Compared with the prior art, the utility model has the beneficial effects that:

[0030] 1. The utility model provides a kind of existing bridge seismic reinforcement device, when installation between main beam and stop block during work, when main beam is close to stop block under the action of external disturbance, such as earthquake, each deformation unit in energy dissipation buffer component can occur compression deformation, on the one hand, the mechanical energy of external disturbance can be dissipated as internal energy of energy dissipation buffer component, on the other hand, buffering effect can also be played, prevent main beam from directly impacting stop block, the instantaneous high-strength impact load transmitted to stop block by main beam is changed into the load of longer time, but change is more smooth and peak is lower, to prevent shear failure of stop block under instantaneous high-strength impact load, improve the reliability of stop block.

[0031] 2, the utility model provides a kind of bridge, by installing the existing bridge seismic reinforcement device of the utility model between main beam and stop block, when main beam is close to stop block under the action of earthquake, the instantaneous high-strength impact load between main beam and stop block can be changed into the load of longer time, but change is more smooth and peak is lower, and finally be changed into internal energy of energy dissipation buffer component and be dissipated, to prevent shear failure of stop block under instantaneous high-strength impact load, to avoid falling beam earthquake damage. DRAWINGS

[0032] Figure 1 It is a kind of existing bridge seismic reinforcement device of the utility model three-dimensional structure explosion schematic diagram;

[0033] Figure 2 It is the three-dimensional structure schematic diagram of the utility model a kind of existing bridge seismic reinforcement device connected in bridge state;

[0034] Figure 3 It is Figure 2 Local enlarged structure schematic diagram of place I in;

[0035] Figure 4 It is the local three-dimensional structure schematic diagram of the utility model a kind of existing bridge seismic reinforcement device connected in bridge and hidden main beam state;

[0036] Figure mark: 1-first connecting seat;2-second connecting seat;21-second stop;3-energy dissipation buffer component;31-deformation unit;32-pad;4-main beam;41-anchoring component;5-stop block;51-mounting hole. DETAILED DESCRIPTION

[0037] The present application will be further described in detail below in conjunction with test examples and specific embodiments. But this should not be understood as the scope of the above-mentioned subject matter of the present application is limited to the following examples, any technology realized based on the content of the present application belongs to the scope of the present application.

[0038] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating orientation or positional relationships such as "upper," "lower," "left," "right," "center," "inside," and "outside" are based on the orientation or positional relationships shown in the accompanying drawings, or are the orientation or positional relationships in which the inventive product / device / apparatus is typically placed when in use. These terms indicating orientation or positional relationships are merely for the purpose of facilitating the description of the present invention or simplifying the description of the specific embodiments to facilitate a quick understanding of the solutions by technicians. They do not indicate or imply that a particular device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship, and therefore should not be construed as limiting the present invention.

[0039] 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 simply understood 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 solution of the present invention.

[0040] In addition, the expressions “first”, “second”, “third”, etc. 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.

[0041] In addition, in the description of the embodiments of the present invention, "several," "plurality," and "a number" represent at least two. It can also be any number such as two, three, four, five, six, seven, eight, nine, or even more than nine.

[0042] Furthermore, in the description of the technical solution of the present invention, unless otherwise expressly specified, defined, or limited, the terms "disposed," "installed," "connected," "connected," "provided with," "laid," and "arranged" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be welded, riveted, bolted, threaded, or other commonly used connection methods in the art. Such connections may be mechanical, electrical, or communicative; they may be direct, indirect via an intermediate medium, or internally connected between two components.

[0043] Example 1

[0044] like Figures 1 to 4 As shown, an existing bridge seismic reinforcement device includes a first connecting seat 1, a second connecting seat 2 and an energy-absorbing buffer member 3; one of the first connecting seat 1 and the second connecting seat 2 is used to connect the block 5; the other of the first connecting seat 1 and the second connecting seat 2 is used to connect the main beam 4; for example, in this embodiment, the first connecting seat 1 is connected to the block 5, and the second connecting seat is connected to the main beam 4; the energy-absorbing buffer member 3 is arranged between the first connecting seat 1 and the second connecting seat 2, and the energy-absorbing buffer member 3 includes at least two deformation units 31, which are distributed along the longitudinal direction of the energy-absorbing buffer member 3. When the first connecting seat 1 is close to the second connecting seat 2, it can drive the deformation unit 31 to undergo compression deformation along the longitudinal direction of the energy-absorbing buffer member 3, thereby dissipating the mechanical energy of the first connecting seat 1 relative to the second connecting seat 2.

[0045] In the above embodiment, the longitudinal direction of the energy-absorbing buffer member 3 is the direction from one end of the energy-absorbing buffer member 3 close to the first connecting seat 1 to the other end of the energy-absorbing buffer member 3; the two ends of the energy-absorbing buffer member 3 can be fixedly connected to the first connecting seat 1 and the second connecting seat 2 respectively, or one end can be fixed and the other end can be abutted, or both ends can be abutted, as long as it can be compressed and deformed under the pressure of the first connecting seat 1 and the second connecting seat 2 when the first connecting seat 1 is close to the second connecting seat 2 to achieve the purpose of buffering and dissipating mechanical energy.

[0046] In an optional embodiment, the deformation unit 31 includes at least one of a cylindrical member, an annular member, an elliptical member, and a wavy member, and the axial direction of the cylindrical member, the annular member, and the elliptical member has an angle with the distribution direction of the deformation unit 31, and the waveform extension direction of the wavy member is arranged along the distribution direction of the deformation unit 31; for example Figure 1 As shown, the deformation unit 31 includes several cylindrical components, and the axis of the cylindrical components is perpendicular to the longitudinal direction of the energy-absorbing buffer component 3. Two adjacent cylindrical components are connected to each other, so that they can deform along the longitudinal direction of the energy-absorbing buffer component 3 when squeezed.

[0047] It should be noted that the specific cross-sectional shapes of the above-mentioned ring and cylinder include but are not limited to circular ring, elliptical ring, square circle, and racetrack shape; the specific shapes of the wave include but are not limited to arc wave, broken line wave, and square wave.

[0048] In an optional embodiment, one end of the energy-absorbing buffer component 3 is connected to the first connecting seat 1 , and the connection method includes but is not limited to threaded connection and welding; there is a gap between the other end of the energy-absorbing buffer component 3 and the second connecting seat 2 .

[0049] In an optional embodiment, the energy dissipation buffer member 3 is connected with a first stopper at one end close to the second connecting seat 2, the second connecting seat 2 is connected with a second stopper 21, the second stopper 21 is located at the side of the first stopper close to the first connecting seat 1, and the first connecting seat 1 drives the first stopper to abut against the second stopper 21 when moving away from the second connecting seat 2. For example Figure 1 As shown in the figure, a plate-shaped member parallel to the second connecting seat 2 is arranged at one end of the energy dissipation buffer member 3 as the first stopper, and an L-shaped member is arranged on the second connecting seat 2 as the second stopper 21, the L-shaped member includes a horizontal part extending along the normal direction of the first stopper and a vertical part arranged parallel to the first stopper, and the distance of the horizontal part extending along the normal direction of the first stopper is greater than or equal to the thickness of the first stopper, so that the vertical part can be located at the side of the first stopper close to the first connecting seat 1, and then abut against the first stopper when the first stopper moves away from the second connecting seat 2, and generate a pulling force in the energy dissipation buffer member 3 to cause the elongation deformation of the energy dissipation buffer member 3.

[0050] In an optional embodiment, the number of the second stoppers 21 is greater than one, and the second stoppers 21 are distributed on at least two opposite sides of the first stopper. For example Figure 1 As shown in the figure, the second stoppers 21 are distributed on the upper and lower sides of the first stopper, so that not only the displacement of the first stopper along the horizontal direction can be limited, but also the displacement of the first stopper along the vertical direction can be limited, and then the free swinging of the first stopper due to the elasticity of the energy dissipation buffer member 3 can be prevented, and the collision between the first stopper and other structures can be avoided.

[0051] In an optional embodiment, a gap is provided between the first stopper and the second stopper 21. For example, in the case that the L-shaped member is arranged on the second connecting seat 2 as the second stopper 21, the distance of the horizontal part of the L-shaped member extending along the normal direction of the first stopper is greater than the thickness of the first stopper, so that a gap can be created on one side or both sides of the first stopper.

[0052] In an optional embodiment, a pad 32 is arranged at one end of the energy dissipation buffer member 3 close to the second connecting seat 2, and the pad 32 is used to abut against the second connecting seat 2. For example Figure 1 As shown in the figure, the first stopper can be directly used as the pad 32, or the pad 32 can be used as the first stopper.

[0053] In an optional embodiment, the number of the energy dissipation buffer members 3 is greater than one. For example Figure 1 As shown in the figure, two energy dissipation buffer members 3 are arranged between the first connecting seat 1 and the second connecting seat 2, and the two energy dissipation buffer members 3 work cooperatively, so that the load borne by each energy dissipation buffer member 3 can be reduced, the design, manufacturing or selection difficulty of the energy dissipation buffer member 3 can be reduced, and the service life of the energy dissipation buffer member 3 can be prolonged; and meanwhile, the load transmission between the first connecting seat 1 and the second connecting seat 2 can be more uniform.

[0054] When designing the seismic reinforcement device for the existing bridge, it can be designed for different types of existing highway bridges, different seismic intensities, and different pier height and span bridges. The following steps can be referred to:

[0055] A full-bridge finite element model is established, the constitutive model of the block 5 is simulated, the basic structural parameters of the seismic reinforcement device for the existing bridge are initially determined, such as the stiffness of the energy dissipation buffer member 3, the size, position and number of the deformation unit 31, the constitutive model of the seismic reinforcement device for the existing bridge is established and simulated in series with the constitutive model of the block 5, the seismic calculation of the full bridge is carried out, and whether the stress and deformation indexes of the bridge meet the specification requirements according to the latest “Code for Seismic Design of Highway Bridges” (JTG / T2231-01-2020). If not, adjust the design parameters of the seismic reinforcement device for the existing bridge, re-simulate and check in series, until the latest specification requirements are met.

[0056] Example 2

[0057] As shown in Figure 2 A bridge includes a main beam 4, and at least one block 5 is arranged on both sides of the main beam 4 along the transverse direction of the bridge, and at least one seismic reinforcement device for the existing bridge of example 1 is arranged between the main beam 4 and each side block 5, wherein the first connecting seat 1 is connected to the block 5, and the second connecting seat 2 is connected to the main beam 4.

[0058] In an optional implementation, the block 5 is provided with a mounting hole 51, the mounting hole 51 has a depth along the transverse direction of the bridge, and a part of the energy dissipation buffer member 3 extends into the mounting hole 51.

[0059] In an optional implementation, the mounting hole 51 penetrates the block 5 along the transverse direction of the bridge, the first connecting seat 1 is connected to the side of the block 5 away from the main beam 4, for example Figure 3 As shown.

[0060] In an optional implementation, the cross-sectional shape of the mounting hole 51 is circular or elliptical, so as to optimize the stress of the edge of the mounting hole 51 and prevent stress concentration and damage to the edge of the mounting hole 51.

[0061] In an optional implementation, the connection mode between the first connecting seat 1 and the block 5, and the connection mode between the second connecting seat 2 and the main beam 4 include but are not limited to anchoring connection, pre-buried steel plate welding, and pre-buried threaded connecting piece connection.

[0062] When installing, the following steps can be followed:

[0063] The anchoring member 41 is implanted on the bottom plate side of the main beam 4, and the connecting hole for the second connecting seat 2 is arranged on the anchoring member 41; the mounting hole 51 is drilled on the block 5; the energy dissipation buffer member 3 is passed through the mounting hole 51, and one end of the energy dissipation buffer member 3 is connected with the first connecting seat 1 and the other end is connected with the pad 32 through the threaded connecting member; the first connecting seat 1 is anchored to the block 5; the pad 32 is inserted from the side between the two second stops 21 on the second connecting seat 2, and the second connecting seat 2 is connected to the anchoring member 41 through the threaded connecting member.

[0064] The above only is the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An existing bridge seismic reinforcement device, characterized in that: include: A first connecting seat (1) and a second connecting seat (2), wherein one of the first connecting seat (1) and the second connecting seat (2) is used to connect a stopper (5); and the other of the first connecting seat (1) and the second connecting seat (2) is used to connect a main beam (4); An energy-absorbing buffer component (3) is provided between the first connecting seat (1) and the second connecting seat (2), the energy-absorbing buffer component (3) comprises at least two deformation units (31), the deformation units (31) are distributed along the longitudinal direction of the energy-absorbing buffer component (3), and the first connecting seat (1) close to the second connecting seat (2) can drive the deformation units (31) to undergo compression deformation along the longitudinal direction of the energy-absorbing buffer component (3).

2. The seismic reinforcement device for an existing bridge according to claim 1, characterized in that: One end of the energy-dissipating buffer component (3) is connected to the first connecting seat (1), and a gap is provided between the other end of the energy-dissipating buffer component (3) and the second connecting seat (2).

3. The seismic reinforcement device for an existing bridge according to claim 2, characterized in that: One end of the energy-absorbing buffer member (3) close to the second connecting seat (2) is connected to a first stopper, and the second connecting seat (2) is connected to a second stopper (21). The second stopper (21) is located on a side of the first stopper close to the first connecting seat (1). When the first connecting seat (1) is away from the second connecting seat (2), the first stopper can be driven to abut against the second stopper (21).

4. The seismic reinforcement device for an existing bridge according to claim 3, characterized in that: There is a gap between the first stopper and the second stopper (21).

5. The seismic reinforcement device for an existing bridge according to claim 2, characterized in that: A pad (32) is provided at one end of the energy-absorbing buffer component (3) close to the second connecting seat (2), and the pad (32) is used for abutting against the second connecting seat (2).

6. The seismic reinforcement device for an existing bridge according to any one of claims 1 to 5, characterized in that: The deformation unit (31) includes at least one of a cylindrical member, an annular member, an elliptical member, and a wave-shaped member.

7. A bridge comprising a main beam (4) and a stopper (5), characterized in that: An anti-seismic reinforcement device for an existing bridge according to any one of claims 1 to 6 is provided between the main beam (4) and the stopper (5).

8. The bridge according to claim 7, characterized in that: The stopper (5) is provided with a mounting hole (51), and a portion of the energy-dissipating buffer component (3) is located in the mounting hole (51).

9. The bridge according to claim 8, characterized in that: The mounting hole (51) passes through the stopper (5) along the transverse bridge direction, and the first connecting seat (1) is connected to a side of the stopper (5) facing away from the main beam (4).

10. A bridge according to any one of claims 7 to 9, characterized in that: The stoppers (5) and the corresponding existing bridge anti-seismic reinforcement devices are provided on both sides of the main beam (4) along the transverse bridge direction.

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