Anti-seismic block structure and bridge anti-seismic block system

Abstract

The present application relates to the technical field of bridge seismic resistance, and particularly relates to an anti-seismic block structure and a bridge anti-seismic block system. Under the action of transverse bridge seismic force, the main beam moves along the transverse bridge direction with the fixed block, and the fixed block contacts with the sliding block during the movement, and pushes the sliding block to move on the base friction surface. Since the sliding block is in contact pressure with the base friction surface, the friction force generated will hinder the transverse movement of the main beam, so as to achieve the purpose of limiting the transverse movement of the bridge main beam. The friction force generated by the movement of the sliding block on the base friction surface dissipates the seismic energy, and reduces the transverse displacement of the main beam. Then, the limiting block is used for the final limiting. The cooperation of the two hindering structures makes the speed of the main beam continuously decrease during the transverse movement, so as to control the horizontal collision force generated on the limiting block. The size of the friction force generated during the transverse movement can be adjusted through the geometric form of the base friction surface and the friction coefficient, so as to reduce the horizontal shear force transmitted to the pier, and realize the control of the seismic response of the pier.

Description

Technical Field

[0001] This invention relates to the field of bridge seismic resistance technology, and in particular to a seismic retaining block structure and a bridge seismic retaining block system. Background Technology

[0002] Under transverse seismic loading, the main beam will undergo transverse displacement relative to the cap beam. If this transverse displacement is too large, it will cause damage to the transverse seismic blocks, detachment of the supports, or even serious damage such as transverse beam collapse.

[0003] Currently, widely used transverse seismic blocks are typically placed at both ends or in the middle of the cap beam. When the main beam experiences significant lateral displacement, it first contacts the seismic blocks, generating a large horizontal impact force. If the seismic blocks are insufficiently strong, they are prone to failure, losing their restraint on the lateral displacement of the main beam and leading to significant lateral displacement, or even lateral beam collapse. Conversely, if the seismic blocks are too strong, they may not fail, but the horizontal force generated by the collision between the main beam and the blocks will be transmitted downwards to the piers, greatly increasing the shear force and bending moment at the pier base, potentially causing pier failure. Due to the uncertainty of seismic forces, it is difficult to avoid both scenarios simply by using seismic blocks of appropriate strength. Therefore, there is an urgent need to propose a bridge seismic block structure system that can both limit the lateral displacement of the main beam and mitigate the seismic response of the piers. Summary of the Invention

[0004] This invention provides a seismic retaining block structure and a bridge seismic retaining block system to solve the defects of existing bridges where seismic retaining blocks are easily damaged or cause pier damage under transverse seismic loading, thereby achieving the effect of both limiting the lateral displacement of the bridge main beam and reducing the seismic response of the piers.

[0005] This invention provides an anti-seismic block structure, comprising:

[0006] The stop base includes a base friction surface and a limiting stop connected to both ends of the base friction surface;

[0007] Two fixed blocks are located between the limiting blocks at both ends of the block base, with a gap between the two fixed blocks;

[0008] A sliding stop is movably disposed on the friction surface of the base and contacts and rubs against the friction surface of the base. The sliding stop is located between the two fixed stops and is adapted to move on the friction surface of the base under the push of the fixed stops.

[0009] According to the present invention, a shock-absorbing block structure is provided, wherein the sliding block is connected to a cable, one end of the cable is fixed and the other end is tightened to the sliding block so that the sliding block presses against the friction surface of the base.

[0010] According to the present invention, the surface of the base friction surface is one of a horizontal surface, a curved surface, or an inclined surface.

[0011] The present invention also provides a bridge seismic blocking system, comprising a bridge main body and the seismic blocking structure described in any one of the above, wherein the bridge main body comprises parallel and spaced main beams and cap beams, and the seismic blocking structure is disposed between the main beams and the cap beams.

[0012] According to the bridge seismic blocking system provided by the present invention, the main body of the bridge further includes a bearing, a pier and a pier cap, the bottom of the pier is fixed to the pier cap, the cap beam is fixed to the top of the pier, and the upper surface of the cap beam supports the main beam through the bearing.

[0013] The base of the stop block is fixed to the upper surface of the cap beam, and the fixed stop block is fixed to the lower surface of the main beam; and when the main beam and the cap beam move relative to each other along the transverse direction of the bridge, the fixed stop block pushes the sliding stop block to move on the friction surface of the base.

[0014] According to the present invention, a bridge seismic blocking block system is provided, wherein the base friction surface is composed of two inclined surfaces arranged in a V-shape, the bottom surface of the sliding block is also V-shaped, and the slopes of the two inclined surfaces of the V-shaped bottom surface correspond to the same slopes of the V-shaped inclined surfaces of the base friction surface.

[0015] According to the present invention, a bridge seismic blocking system is provided, wherein a cable is connected between the sliding block and the abutment, one end of the cable is anchored to the abutment, and the other end is tightened to the sliding block.

[0016] According to the present invention, a bridge seismic blocking system is provided, wherein the sliding block is symmetrically connected to the cable on both sides along the direction of movement.

[0017] According to the present invention, a bridge seismic blocking system is provided, wherein the cable is one of steel cable, prestressed tendon or shape memory alloy cable.

[0018] According to the bridge seismic blocking system provided by the present invention, the cables can be prestressed during assembly.

[0019] This invention provides an anti-seismic block structure and a bridge anti-seismic block system. Under transverse seismic loading, the main girder of the bridge, carrying fixed blocks, moves along the transverse direction. During this movement, the fixed blocks come into contact with sliding blocks, pushing the sliding blocks to move on the friction surface of the base. Due to the friction between the sliding blocks and the base friction surface, the resulting frictional force hinders the transverse movement of the main girder, thus limiting its lateral displacement. The frictional force generated by the sliding blocks moving on the base friction surface dissipates seismic energy, reducing the lateral displacement of the main girder. Finally, a limiting block provides the final restraint. The cooperation of these two restraining structures continuously reduces the speed of the main girder during transverse movement, controlling the horizontal impact force on the limiting block. The magnitude of the frictional force generated during transverse movement can be adjusted by the geometry of the base friction surface and its friction coefficient to reduce the horizontal shear force transmitted to the piers, thereby controlling the seismic response of the piers. Attached Figure Description

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

[0021] Figure 1 This is a schematic diagram of the anti-seismic block structure provided by the present invention;

[0022] Figure 2 This is a structural schematic diagram of the bridge seismic blocking block system provided by the present invention;

[0023] Figure 3 yes Figure 2 The front view;

[0024] Figure 4 yes Figure 2 Side view;

[0025] Figure 5 yes Figure 3 Enlarged view of part A.

[0026] Figure label:

[0027] 10. Stop block base; 11. Base friction surface; 12. Limiting stop block; 20. Fixed stop block; 30. Sliding stop block; 40. Cable; 50. Main beam; 60. Cap beam; 70. Support; 80. Pier; 90. Abutment; B. Seismic stop block structure. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0029] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "between", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0030] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0031] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] The following is combined Figures 1-5 This invention describes an anti-seismic block structure and a bridge anti-seismic block system.

[0034] A specific embodiment of the present invention provides an anti-seismic block structure, see [link to relevant documentation]. Figure 1 As shown, the device includes a stop base 10, fixed stops 20, and sliding stops 30. The stop base 10 includes a base friction surface 11 and limiting stops 12 connected to both ends of the base friction surface 11. The two fixed stops 20 are located in the middle of the limiting stops 12 at both ends of the stop base 10. The sliding stops 30 are movably disposed on the base friction surface 11 and contact and rub against the base friction surface 11. The sliding stops 30 are located between the two fixed stops 20 and are suitable for moving on the base friction surface 11 under the push of the fixed stops 20.

[0035] It is understood that the seismic blocking structure in this embodiment can be used to solve the defect that the seismic blocking blocks of existing bridges are easily damaged or cause damage to the bridge piers under transverse seismic action. Specifically, this is achieved by limiting the lateral displacement of the main beam of the bridge.

[0036] In this embodiment, the seismic process of the bridge seismic blocking system can be referred to later. The fixed block 20 and the block base 10 can be fixed on the main beam 50 and the cap beam 60 of the bridge, respectively. When a transverse earthquake occurs and the main beam 50 moves relative to the cap beam 60, the main beam 50 drives the fixed block 20 to move along the transverse direction. During the movement, the fixed block 20 will come into contact with the sliding block 30, pushing the sliding block 30 to move on the base friction surface 11. Due to the friction between the sliding block 30 and the base friction surface 11, the friction force generated will hinder the transverse movement of the main beam 50, thereby limiting the transverse displacement of the main beam 50 of the bridge.

[0037] When the relative displacement between the main beam 50 and the cap beam 60 in the transverse direction is too large, approaching the point of lateral beam collapse, the fixed stop 20 will be restricted by the limiting stop 12 at the end of the stop base 10 and will not be able to move further. This limits the further relative displacement of the main beam 50, ensuring that the main beam 50 will not collapse laterally under a major earthquake. In this embodiment, the structure dissipates seismic capacity and reduces the lateral displacement of the main beam 50 through the friction force generated by the sliding stop 30 moving on the friction surface 11 of the base. The limiting stop 12 then provides final restraint. The cooperation of these two obstructive structures causes the speed of the main beam 50 to continuously decrease during the lateral movement, thereby controlling the horizontal impact force generated on the limiting stop 12. The magnitude of the friction force generated during the lateral movement can be adjusted by the geometry of the base friction surface and its friction coefficient to reduce the horizontal shear force transmitted to the pier, thus controlling the seismic response of the pier.

[0038] In the above embodiments, the friction between the sliding stop 30 and the base friction surface 11 plays a crucial role in hindering the lateral movement of the main beam 50. The relative relationship between the sliding stop 30 and the base friction surface 11 largely determines the magnitude of the friction force. Conventional limiting mechanisms can be used to press the sliding stop 30 onto the base friction surface 11. For example, a pressure cap can be provided on the outer periphery of the sliding stop 30, with its bottom movably connected to the side of the stop base 10. The pressure cap presses the sliding stop 30, and the pressure cap moves along with the sliding stop 30 on the base friction surface 11. Of course, other limiting mechanisms can also be used to restrict the relative relationship between the sliding stop 30 and the base friction surface 11. In some embodiments, the sliding stop 30 is connected to a cable 40, with one end of the cable 40 fixed and the other end tightening the sliding stop 30 so that the sliding stop 30 presses against the base friction surface 11.

[0039] As the sliding stop 30 moves on the base friction surface 11, the cable 40 is stretched. The stretching of the cable 40 generates a reaction force acting on the sliding stop 30, resulting in better compaction between the sliding stop 30 and the base friction surface 11, and increased friction. As the sliding stop 30 moves laterally, the friction force hindering the main beam 50 increases, and the hindering effect becomes more obvious. The surface of the base friction surface 11 can be a horizontal surface, a curved surface, or an inclined surface. In this embodiment, the surface of the base friction surface 11 is set as an inclined surface. When the sliding stop 30 undergoes horizontal displacement, it will also undergo a certain upward displacement, which allows the cable 40 to further extend, thereby further increasing the friction force to hinder the movement of the main beam 50.

[0040] This invention also provides a bridge seismic-resistant retaining block system, see [link / reference]. Figure 2 As shown, in a specific embodiment of the bridge seismic blocking system, the bridge seismic blocking system includes the main body of the bridge and any of the above-mentioned seismic blocking structures. The main body of the bridge includes parallel and spaced main beams 50 and cap beams 60. See [link to relevant documentation]. Figure 5 As shown, Figure 5 Part B on the top is a seismic retaining block structure, which is set between the main beam 50 and the cap beam 60.

[0041] Specifically, in combination Figure 3 and Figure 4 As shown, the main body of the bridge includes a main beam 50, a cap beam 60, a support 70, a pier 80, and a foundation 90. The bottom of the pier 80 is fixed to the foundation 90, and the cap beam 60 is fixed to the top of the pier 80. The upper surface of the cap beam 60 supports the main beam 50 through the support 70. The seismic blocking structure includes a blocking base 10, a fixed blocking block 20, and a sliding blocking block 30. The blocking base 10 is fixed to the upper surface of the cap beam 60, and the fixed blocking block 20 is fixed to the lower surface of the main beam 50. When the main beam 50 and the cap beam 60 move relative to each other along the transverse direction of the bridge, the fixed blocking block 20 pushes the sliding blocking block 30 to move on the friction surface 11 of the base.

[0042] Combination Figure 3 and Figure 4 As shown, a set of seismic-resistant block structures is installed between the main beam 50 and the cap beam 60, including two fixed blocks 20, a block base 10, a sliding block 30, and four cables 40. The fixed blocks 20 are anchored to the middle part of the bottom surface of the main beam 50, and a gap is left between the two fixed blocks 20 in the transverse direction of the bridge. The block base 10 is anchored to the middle part of the top surface of the cap beam 60. The sliding block 30 is located above the block base 10 and between the two fixed blocks 20, and can slide along the transverse direction of the bridge. The lower end of the cable 40 is anchored to the bridge abutment 90, and the upper end is connected to the sliding block 30.

[0043] Combination Figure 3 and Figure 5 As shown, in this seismic abutment structure, the fixed abutment 20 is located on both sides of the sliding abutment 30, and the lower surface of the fixed abutment 20 is lower than the minimum height of the upper surface of the sliding abutment 30. The sliding abutment 30 is located on the base friction surface 11 of the abutment base 10 and can slide on the base friction surface 11 along the transverse direction of the bridge. The upper surface of the limiting abutment 12 of the abutment base 10 is higher than the lower surface of the fixed abutment 20. Therefore, when the main beam 50 moves to the left or right relative to the cap beam 60, the fixed abutment 20 can push the sliding abutment 30 to slide on the base friction surface 11; when the sliding abutment 30 slides to the left or right to a set value, the fixed abutment 20 will contact the limiting abutments 12 at both ends of the abutment base 10.

[0044] It should be noted that in this seismic-resistant block structure, an initial lateral gap can be provided between the fixed block 20 and the sliding block 30, or the two can be completely fitted together, as needed. Furthermore, in Figure 5In the illustrated embodiment, the surface height of the base friction surface 11 gradually increases from the middle to both sides, forming two V-shaped inclined surfaces on the surface of the base friction surface 11. The bottom surface of the sliding block 30 is a V-shaped inclined surface with the same slope as the base friction surface 11. When the sliding block 30 slides to the left or right on the planar base 11, it will simultaneously generate an upward displacement, causing the cable 40 to elongate. If the base friction surface 11 is planar, the sliding block 30 will slide horizontally on the base friction surface 11, but it will also cause the cable 40 to elongate. Therefore, the base friction surface 11 of the block base 10 can be set to different forms such as planar, inclined, or curved surfaces as needed. At the same time, prestress can be applied to the cable 40 as needed to adjust the mechanical performance parameters of the structural system of the present invention to meet the different requirements of the structural system of the present invention under different conditions.

[0045] In this embodiment, the fixed stop 20, the stop base 10, and the sliding stop 30 can be prisms or other forms, and the present invention does not limit them. Similarly, the fixed stop 20, the stop base 10, and the sliding stop 30 can be made of concrete, steel, or other materials, and the present invention does not limit them. The cable 40 can be made of steel, alloy materials, or other materials, and the present invention also does not limit it.

[0046] In this invention, a cable 40 is connected between the sliding block 30 and the pier 90. One end of the cable 40 is anchored to the pier 90, and the other end is tightened to the sliding block 30. The connection between the upper end of the cable 40 and the sliding block 30 can be determined as needed, and the lower end of the cable 40 can also be directly fixed to the ground, the lower end of the cap beam, or other feasible locations.

[0047] In one embodiment of a seismic-resistant retaining structure, the number of cables 40 can be one, for example... Figure 4 In the seismic retaining block structure, one end of the cable 40 is anchored to the pier cap 90, and the other end extends from the left end of the cap beam 60 to above the sliding block 30, then to the right side of the cap beam and extends to the pier cap, where it is fixed.

[0048] The number of cables 40 can also be two or other numbers, and the present invention is not limited thereto. In one embodiment, the sliding stop 30 is connected to four cables 40, see [reference]. Figure 2 and Figure 3As shown, the sliding block 30 is symmetrically connected to two cables 40 on both sides along the direction of movement. As the displacement of the sliding block 30 increases, two cables 40 will lengthen accordingly, while the other two cables 40 remain relaxed. The lengthened cables 40 can increase the normal pressure between the sliding block 30 and the base friction surface 11, thereby increasing the friction between them to hinder further displacement of the main beam 50. In addition, the cables 40 can also be replaced by materials such as vertical cables, prestressed tendons, or shape memory alloy cables in self-resetting piers, forming a self-resetting pier sliding seismic-resistant block structure system.

[0049] In this embodiment, the position of the seismic blocking structure can be set in the middle of the cap beam 60 according to actual needs, and its position relative to the cap beam 60 is not limited. It is understood that the number of seismic blocking structures is also not limited and can be set as needed. In addition, a seismic blocking structure can be decomposed into two parts along the middle vertical plane, that is, a sliding block 30 is decomposed into two halves of sliding blocks, and a block base 10 is divided into two parts. Then the seismic blocking block 30, the left half of the block base 10, and the left fixed block 20 form a seismic blocking structure with a unidirectional limiting function. At this time, the left half of the sliding block should be placed in the middle of the left limiting block and the left fixed block 20.

[0050] The seismic-resistant block structure proposed in this invention can be used not only for the double-column piers in this embodiment, but also for single-column or multi-column piers without cap beams; this invention has no limitation in this regard. Furthermore, the seismic-resistant block structure proposed in this invention can be installed not only at bridge piers, but also, with simple modifications, at abutments as needed. To improve the applicability of this invention, the fixed block 20, block base 10, sliding block 30, and cable 40 can be designed as prefabricated components to facilitate rapid replacement of damaged components after an earthquake.

[0051] In summary, the embodiments of the seismic retaining block structure and bridge seismic retaining block system of the present invention have at least the following advantages compared with the prior art:

[0052] When the main beam 50 undergoes lateral displacement relative to the cap beam 60, such as a rightward relative displacement of the main beam 50, the left fixed stop 20 pushes the sliding stop 30 to slide to the right on the base friction surface 11 of the stop base 10. Friction is generated between the sliding stop 30 and the base friction surface 11 to hinder the displacement of the main beam 50. As the displacement of the sliding stop 30 increases, the cable 40 will extend accordingly, increasing the normal pressure between the sliding stop 30 and the base friction surface 11, thereby increasing the friction between the two to hinder further displacement of the main beam 50.

[0053] The base friction surface 11 of the stop block base 10 can be set as an inclined surface or a curved surface, so that when the sliding stop block 30 undergoes horizontal displacement, it will also generate a certain upward displacement, which can further extend the cable 40, thereby further increasing the friction force to hinder the movement of the main beam 50.

[0054] When the sliding block 30 is pushed by the fixed block 20, the horizontal force between the two will be transmitted to the bottom of the pier 80 through the block base 10, the cap beam 60, etc., increasing the response of the bottom of the pier 80. Since the lower end of the cable 40 is anchored to the pier cap 90, it will generate a reverse torque on the pier 80, thereby reducing the response of the bottom of the pier 80 and thus protecting the pier 80.

[0055] When the main beam 50 undergoes lateral displacement, the pier 80 will also deform in the same direction. The tension in the cable 40 can also provide a reverse force to the pier 80, giving the pier 80 a certain self-resetting ability.

[0056] When the relative displacement of the main beam 50 is too large and it is close to the occurrence of lateral beam collapse, the sliding block 30 will be restricted by the limiting block 12 of the block base 10 and will not be able to continue to move, thereby limiting the further relative displacement of the main beam 50 and ensuring that the main beam 50 will not have the problem of lateral beam collapse under the action of a major earthquake.

[0057] The fixed stop 20, stop base 10, sliding stop 30, cable 40 and other components in this invention can all be designed as prefabricated components to facilitate the rapid replacement of damaged components after an earthquake.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A seismic-resistant block structure, characterized in that, include: The stop base (10) includes a base friction surface (11) and a limiting stop (12) connected to both ends of the base friction surface (11). Two fixed blocks (20) are located between the limiting blocks (12) at both ends of the block base (10), and a gap is left between the two fixed blocks (20); A sliding stop (30) is movably disposed on the friction surface (11) of the base and contacts and rubs against the friction surface (11) of the base. The sliding stop (30) is located between the two fixed stops (20) and is adapted to move on the friction surface (11) of the base under the push of the fixed stops (20). The base friction surface (11) is composed of two inclined surfaces arranged in a V shape. The bottom surface of the sliding block (30) is also V-shaped, and the slopes of the two inclined surfaces of the V-shaped bottom surface are the same as the slopes of the V-shaped inclined surfaces of the base friction surface (11). The sliding block (30) is symmetrically connected to two sides along the direction of movement by cables (40). One end of the cable (40) is fixed and the other end pulls the sliding block (30) so that the sliding block (30) presses against the friction surface (11) of the base.

2. A bridge seismic-resistant block system, characterized in that, The bridge includes a main body and the seismic blocking structure as described in claim 1. The main body includes parallel and spaced main beams (50) and cap beams (60), and the seismic blocking structure is disposed between the main beams (50) and the cap beams (60).

3. The bridge seismic blocking system according to claim 2, characterized in that, The main body of the bridge also includes a support (70), a pier (80) and a pile cap (90). The bottom of the pier (80) is fixed to the pile cap (90), and the cap beam (60) is fixed to the top of the pier (80). The upper surface of the cap beam (60) supports the main beam (50) through the support (70). The stop block base (10) is fixed to the upper surface of the cap beam (60), and the fixed stop block (20) is fixed to the lower surface of the main beam (50); and when the main beam (50) and the cap beam (60) move relative to each other along the transverse direction of the bridge, the fixed stop block (20) pushes the sliding stop block (30) to move on the friction surface (11) of the base.

4. The bridge seismic blocking system according to claim 3, characterized in that, A cable (40) is connected between the sliding block (30) and the support platform (90). One end of the cable (40) is anchored to the support platform (90), and the other end is tightened to the sliding block (30).

5. The bridge seismic blocking system according to claim 4, characterized in that, The cable (40) is one of a steel cable, a prestressed tendon, or a shape memory alloy cable.

6. The bridge seismic blocking system according to claim 4, characterized in that, The cable (40) is prestressed during assembly.

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