Bridge damping supporting system

Abstract

The invention provides a bridge damping supporting system which comprises a longitudinal movable support arranged on a bridge movable pier and a fixed limiting support arranged on a bridge fixed pier, and the longitudinal movable support comprises a first transverse constraint structure, a transverse limiting structure, a vertical tensile limiting structure and a vertical rotation limiting structure. The fixed limiting support comprises a second transverse constraint structure, a first longitudinal constraint structure, a longitudinal limiting structure, a vertical tensile limiting structure and a vertical rotation limiting structure; the shock absorption and shock resistance of the bridge in the transverse bridge direction, the longitudinal bridge direction and the vertical direction are improved, the integrity of the support structure and the safety of the bridge during an earthquake can be improved, the situations of bridge falling, bridge jumping and the like are prevented, and the situation that key components of the support are separated and disengaged to lose basic functions due to overlarge displacement of the support structure during the earthquake is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge vibration reduction and isolation, and in particular to a bridge vibration reduction and support system. Background Art

[0002] Bridge seismic isolation technology uses scientific and rational design measures to achieve a certain degree of seismic isolation or vibration reduction in bridge structures, protecting them from natural disasters such as earthquakes. Many active fault zones exist in areas such as southwest and southeastern coastal areas of China. Infrastructure construction inevitably places bridge structures within seismically active areas. During an earthquake, bridge bearings are subject to both the direct impact of seismic waves and the dynamic response of the bridge structure. Therefore, the seismic performance of these bearings and the reliability of their connection to the upper and lower structures are crucial to the safety and stability of the entire bridge.

[0003] Under the action of an earthquake, bridge bearings are subject to various forces, including tension, pressure, shear, etc. in non-fixed directions. Specifically, near-field earthquakes may cause the following expansion deformation and damage to bridge bearings: (1) Excessive displacement of bearings: Under the action of an earthquake, bridge bearings may produce large displacements, including horizontal displacement, vertical displacement, and rotational displacement. These displacements may cause the connection between the bearing and the beam or pier to fail, the spherical center plate to rotate excessively and fly out, etc., thereby affecting the overall stability and safety of the bridge. (2) Shearing and falling off: Under the action of a strong earthquake, the limit plate of an ordinary hard-resistance bridge bearing may shear or fall off due to excessive shear force, causing the bearing structure to separate and lose its basic function.

[0004] Existing railway bridges are often equipped with spherical bearings or hyperbolic seismic isolation bearings. However, these conventional bearings have no limit on horizontal sliding and vertical rotation. Without limit on horizontal sliding and rotation, the bearings are prone to excessive plane displacement and rotational displacement under strong earthquakes, which may cause the seat plates to separate and the middle seat plates to fly out. At the same time, the bearings do not have a vertical tensile function, that is, a vertical limiting function. When subjected to vertical tensile force, the various components of the bearing seat plates may become detached or fail, resulting in a vertical "jumping beam" phenomenon, which seriously affects the overall stability of the bridge structure. In addition, the seismic energy absorption function of conventional bridge bearings is not taken into consideration during design. In order to reduce the resistance to normal bridge activities, the bearing plane friction coefficient is low and the energy absorption capacity is weak. Summary of the Invention

[0005] In view of this, the present invention aims to propose a bridge shock-absorbing support system to solve the problems of poor horizontal limitation, vertical rotation limitation and vertical tensile limitation capabilities of conventional supports in the prior art.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A bridge shock-absorbing support system includes a longitudinal movable support arranged on a movable pier of the bridge and a fixed limit support arranged on a fixed pier of the bridge. The longitudinal movable support includes a first lateral constraint structure, a lateral limit structure, a vertical tensile limit structure, and a vertical rotation limit structure. The fixed limit support includes a second lateral constraint structure, a first longitudinal constraint structure, a longitudinal limit structure, a vertical tensile limit structure, and a vertical rotation limit structure.

[0008] Furthermore, the longitudinal movable support includes a base plate, a lower seat plate, a middle seat plate, and an upper seat plate arranged from bottom to top, a spherical friction pair is arranged between the lower seat plate and the middle seat plate, and a plane friction pair is arranged between the middle seat plate and the upper seat plate; an upwardly extending limit baffle is provided on the outer edge of the base plate for laterally limiting the lower seat plate, a limit plate is provided on the limit baffle, and the limit plate can abut against the lower seat plate for laterally constraining the lower seat plate.

[0009] Furthermore, an energy-absorbing friction pair is provided between the base plate and the lower seat plate.

[0010] Furthermore, an upper tensile plate is provided on the upper surface of the lower seat plate, and the upper tensile plate is located above at least part of the plate structure of the upper seat plate. In vertical projection, the projection of the upper tensile plate partially overlaps with the projection of the upper seat plate; a lower tensile plate is provided on the limiting baffle, and the lower tensile plate is located above at least part of the plate structure of the middle seat plate. In vertical projection, the projection of the lower tensile plate partially overlaps with the projection of the middle seat plate.

[0011] Furthermore, a sinking structure is provided at one end of the lower seat plate close to the upper seat plate, and the middle seat plate can abut against the sinking structure; in the vertical direction, a guide friction pair is provided between the outer edge side wall of the upper seat plate and the side wall of the sinking structure.

[0012] Furthermore, the fixed limit support includes a base plate, a lower seat plate, a middle seat plate, and an upper seat plate arranged from bottom to top, a spherical friction pair is arranged between the lower seat plate and the middle seat plate, and a plane friction pair is arranged between the middle seat plate and the upper seat plate; an upwardly extending limit baffle is provided on the outer edge of the base plate for longitudinally limiting the lower seat plate, a limit plate is provided on the limit baffle, and the limit plate can abut against the lower seat plate for longitudinally constraining the lower seat plate.

[0013] Furthermore, the fixed limiting support includes a stopper connected to the upper seat plate. In the transverse direction, the stopper is correspondingly arranged on the outer sides of the two ends of the lower seat plate, and the end portion of the lower seat plate can abut against the corresponding stopper.

[0014] Furthermore, an energy-absorbing friction pair is provided between the base plate and the lower seat plate.

[0015] Furthermore, an upper tensile plate is provided on the upper surface of the lower seat plate, and the upper tensile plate is located above at least part of the plate structure of the upper seat plate. In vertical projection, the projection of the upper tensile plate partially overlaps with the projection of the upper seat plate; a lower tensile plate is provided on the limiting baffle, and the lower tensile plate is located above at least part of the plate structure of the middle seat plate. In vertical projection, the projection of the lower tensile plate partially overlaps with the projection of the middle seat plate.

[0016] Furthermore, a sinking structure is provided at one end of the lower seat plate close to the upper seat plate, and the middle seat plate can abut against the sinking structure; in the vertical direction, a guide friction pair is provided between the outer edge side wall of the upper seat plate and the side wall of the sinking structure.

[0017] Compared with the existing technology, the bridge shock-absorbing support system described in the present invention has the following advantages:

[0018] The bridge shock-absorbing support system described in the present invention, through the coordinated action of longitudinal movable supports and fixed limit supports, not only enables the system to have the conventional functions of conventional supports such as vertical load-bearing, horizontal load-bearing, horizontal sliding, and vertical rotation, but also can provide a longitudinal limiting function, as well as the dual functions of first and second lateral constraints (first-level lateral restrictions) and lateral restrictions (second-level lateral restrictions); at the same time, the coordination of the longitudinal movable supports and fixed limit supports in vertical tensile restriction and vertical rotation restriction can provide all-round limiting protection for the bridge in the vertical direction; thereby, the present application improves the shock-absorbing and earthquake-resistant capabilities of the bridge in the transverse, longitudinal and vertical directions, can improve the integrity of the support structure during an earthquake (that is, key components will not separate and disengage) and the safety of the bridge, prevent the occurrence of bridge beam falling, beam jumping, etc., and avoid excessive displacement of the support structure during an earthquake, which causes the key components of the support to separate and disengage and lose their basic functions.

[0019] In addition, the present application uses the two structures of the lateral constraint structure of the fixed limit support and the lateral limit structure of the longitudinal movable support to work together. Compared with the conventional support system or support, the present application can effectively reduce the horizontal constraint load in the transverse direction of the bridge, which is conducive to reducing the size of the relevant supports and has better economy and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 A schematic diagram of the layout of a bridge shock-absorbing support system according to an embodiment of the present invention;

[0022] Figure 2This is a cross-sectional view of a longitudinal movable support in a bridge shock-absorbing support system according to an embodiment of the present invention, taken in the transverse direction of the bridge;

[0023] Figure 3 A half-section view of a longitudinal movable bearing in a bridge shock-absorbing support system according to an embodiment of the present invention, viewed from the longitudinal bridge direction;

[0024] Figure 4 This is a cross-sectional view of a fixed limit bearing in a bridge shock-absorbing support system according to an embodiment of the present invention, taken in the longitudinal direction of the bridge;

[0025] Figure 5 This is a half-section view of a fixed limit support in a bridge shock-absorbing support system described in an embodiment of the present invention, viewed in the transverse direction of the bridge.

[0026] Description of reference numerals:

[0027] 100. Longitudinal movable support; 200. Fixed limit support; 1. Base plate; 2. Energy-absorbing friction pair; 3. Limit plate; 4. Lower seat plate; 5. Upper tensile plate; 6. Guide friction pair; 7. Middle seat plate; 8. Upper seat plate; 9. Plane friction pair; 10. Spherical friction pair; 11. Lower tensile plate; 12. Stop block; 13. Limit baffle; 14. Sinking platform structure. DETAILED DESCRIPTION

[0028] The inventive concepts of the present disclosure will be described below using terms commonly used by those skilled in the art to convey the essence of their work to other persons skilled in the art. However, these inventive concepts can be embodied in many different forms and should not be considered limited to the embodiments described herein.

[0029] It should be noted that, unless there is a conflict, the embodiments and features within the embodiments of the present invention may be combined with each other. The terms "transverse bridge direction," "horizontal direction," "longitudinal bridge direction," "longitudinal direction," and "vertical direction" in this application are all commonly used directional terms in the art, based on bridges. Because some components of the longitudinal movable support 100 and the fixed limit support 200 in this application have the same names, the components with the same names in the two are referred to as components that are owned by each of the two, rather than being shared by both, to avoid ambiguity.

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0031] In order to solve the problem of poor horizontal limitation, vertical rotation limitation and vertical tensile limitation of conventional supports in the prior art, this embodiment proposes a bridge shock absorption support system, as shown in the attached figure. Figure 1-5As shown, the system includes a longitudinal movable support 100 provided on a movable pier of the bridge and a fixed limit support 200 provided on a fixed pier of the bridge. The longitudinal movable support 100 includes a first lateral constraint structure, a lateral limit structure, a vertical tensile limit structure, and a vertical rotation limit structure, and is used to provide lateral constraint, lateral limit, vertical tensile limit, and vertical rotation limit functions for the bridge. The fixed limit support 200 includes a second lateral constraint structure, a first longitudinal constraint structure, a longitudinal limit structure, a vertical tensile limit structure, and a vertical rotation limit structure, and is used to provide lateral constraint, longitudinal constraint, longitudinal limit, vertical tensile limit, and vertical rotation limit functions for the bridge. In this application, vertical rotation can also be understood as vertical swinging.

[0032] Therefore, the present application, through the coordinated action of the longitudinal movable support 100 and the fixed limit support 200, not only enables the system to have the conventional functions of a conventional support, such as vertical bearing, horizontal bearing, horizontal sliding, and vertical rotation, but also can provide a longitudinal limit function, as well as the dual functions of the first lateral constraint and the second lateral constraint (first-level lateral constraint) and lateral limit (second-level lateral constraint); at the same time, the coordination of the longitudinal movable support 100 and the fixed limit support 200 in vertical tensile limit and vertical rotation limit can provide all-round limit protection for the bridge in the vertical direction; thus, the present application improves the shock absorption and earthquake resistance of the bridge in the transverse, longitudinal and vertical directions, can improve the integrity of the support structure during an earthquake (that is, key components will not separate and disengage) and the safety of the bridge, prevent the occurrence of bridge beam falling, beam jumping, etc., and avoid excessive displacement of the support structure during an earthquake, which causes the key components of the support to separate and disengage and lose their basic functions.

[0033] In addition, the present application uses the lateral constraint structure of the fixed limit support 200 and the lateral limit structure of the longitudinal movable support 100 to work together. Compared with conventional support systems or supports, the present application can effectively reduce the horizontal constraint load in the transverse direction of the bridge, which is beneficial to reducing the size of related supports and has better economy and applicability.

[0034] Preferably, two longitudinal movable supports 100 are sequentially arranged on the movable pier of the bridge along the transverse direction of the bridge; and two fixed limit supports 200 are sequentially arranged on the fixed pier of the bridge along the transverse direction of the bridge to improve the shock absorption and earthquake resistance of the system.

[0035] The longitudinal movable support 100 includes a base plate 1, a lower seat plate 4, a middle seat plate 7, and an upper seat plate 8 arranged from bottom to top, a spherical friction pair 10 is arranged between the lower seat plate 4 and the middle seat plate 7, and a plane friction pair 9 is arranged between the middle seat plate 7 and the upper seat plate 8; an upwardly extending limit baffle 13 is provided on the outer edge of the base plate 1 for laterally limiting the lower seat plate 4, a limit plate 3 is provided on the limit baffle 13, and the limit plate 3 can abut against the lower seat plate 4 for laterally constraining the lower seat plate 4 to form the first laterally constraining structure. Therefore, during normal use of the system, it can meet the basic functions of the support under normal working conditions, such as vertical and horizontal load-bearing, longitudinal sliding, and vertical rotation. At the same time, the limit plate 3 is used as the first lateral constraint structure to provide lateral constraint, providing lateral constraint and lateral limiting under normal working conditions. During an earthquake, when the transverse seismic force exceeds the ultimate bearing capacity of the limit plate 3, the limit plate 3 will be destroyed and the constraint will be released. The lower seat plate 4 will move laterally relative to the base plate 1 until the lateral limit displacement is reached. The lower seat plate 4 will be laterally limited by the limit baffle 13, thereby limiting further sliding of the bridge in the transverse direction. The limit plate 3 and the limit baffle 13 can be connected by fasteners.

[0036] Furthermore, an energy-absorbing friction pair 2 is provided between the base plate 1 and the lower seat plate 4. When the lower seat plate 4 is laterally displaced relative to the base plate 1, the energy-absorbing friction pair 2 can play a role in shock absorption and energy dissipation, thereby suppressing the lateral relative displacement between the base plate 1 and the lower seat plate 4, so as to further improve the shock absorption and anti-vibration effect, and avoid structural damage between the base plate 1 and the lower seat plate 4 due to hard impact.

[0037] An upper tensile plate 5 is provided on the upper surface of the lower seat plate 4. The upper tensile plate 5 is located above at least a portion of the plate structure of the upper seat plate 8. In vertical projection, the projection of the upper tensile plate 5 partially overlaps with the projection of the upper seat plate 8. A lower tensile plate 11 is provided on the limit baffle 13. The lower tensile plate 11 is located above at least a portion of the plate structure of the middle seat plate 7. In vertical projection, the projection of the lower tensile plate 11 partially overlaps with the projection of the middle seat plate 7. Thus, by providing the upper tensile plates 5 and the lower tensile plates 11, when subjected to vertical seismic forces, the bridge drives the upper seat plate 8 upward, into contact with the upper tensile plate 5, and the force is transmitted to the lower seat plate 4. As the lower seat plate 4 moves upward, it contacts the lower tensile plate 11, and the force is further transmitted to the base plate 1 and then to the pier, thereby limiting the vertical displacement of the bridge and satisfying the vertical tensile resistance function under seismic conditions. The upper tensile plate 5 and the lower seat plate 4 , and the lower tensile plate 11 and the limit baffle 13 can all be connected by fasteners.

[0038] A sinking structure 14 is provided at one end of the lower seat plate 4 close to the upper seat plate 8, and the middle seat plate 7 can abut against the sinking structure 14. Therefore, during an earthquake, if the bridge drives the middle seat plate 7 to rotate vertically under the action of the seismic force, when the vertical rotation exceeds the limit angle, the middle seat plate 7 will contact the sinking structure 14, limiting the excessive vertical rotation of the middle seat plate 7, so as to meet the vertical rotation limiting function under earthquake conditions.

[0039] In the vertical direction, a guide friction pair 6 is set between the outer edge side wall of the upper seat plate 8 and the side wall of the sinking platform structure 14, which can not only play a role in shock absorption and energy consumption during the vertical displacement between the upper seat plate 8 and the lower seat plate 4, but also can resist the lateral horizontal force to a certain extent.

[0040] The fixed limit support 200 includes a base plate 1, a lower seat plate 4, a middle seat plate 7, and an upper seat plate 8 arranged from bottom to top, a spherical friction pair 10 is arranged between the lower seat plate 4 and the middle seat plate 7, and a plane friction pair 9 is arranged between the middle seat plate 7 and the upper seat plate 8; an upwardly extending limit baffle 13 is provided on the outer edge of the base plate 1 for longitudinally limiting the lower seat plate 4, a limit plate 3 is provided on the limit baffle 13, and the limit plate 3 can abut against the lower seat plate 4 for longitudinally constraining the lower seat plate 4. Therefore, during normal use of the system, it can meet the basic functions of the support under normal working conditions, such as vertical and horizontal load-bearing, lateral sliding, and vertical rotation. At the same time, the limit plate 3 is used as the first longitudinal constraint structure to provide longitudinal constraint, providing longitudinal constraint and longitudinal limiting functions under normal working conditions. During an earthquake, when the longitudinal bridge-direction seismic force exceeds the ultimate bearing capacity of the limit plate 3, the limit plate 3 will be destroyed and the constraint will be released. The lower seat plate 4 will longitudinally displace relative to the base plate 1 until the longitudinal limit displacement is reached. The lower seat plate 4 will be longitudinally limited by the limit baffle 13, thereby limiting further sliding of the bridge in the longitudinal bridge direction. The limit plate 3 and the limit baffle 13 can be connected by fasteners.

[0041] Furthermore, an energy-absorbing friction pair 2 is provided between the base plate 1 and the lower seat plate 4. In the process of longitudinal displacement of the lower seat plate 4 relative to the base plate 1, the energy-absorbing and shock-absorbing function is increased, and the seismic energy is dissipated, which can play a role in shock absorption and energy consumption, and suppress the longitudinal relative displacement between the base plate 1 and the lower seat plate 4, so as to further improve the shock absorption and earthquake resistance effect, and avoid structural damage between the base plate 1 and the lower seat plate 4 due to hard impact.

[0042] An upper tensile plate 5 is provided on the upper surface of the lower seat plate 4. The upper tensile plate 5 is located above at least a portion of the plate structure of the upper seat plate 8. In vertical projection, the projection of the upper tensile plate 5 partially overlaps with the projection of the upper seat plate 8. A lower tensile plate 11 is provided on the limit baffle 13. The lower tensile plate 11 is located above at least a portion of the plate structure of the middle seat plate 7. In vertical projection, the projection of the lower tensile plate 11 partially overlaps with the projection of the middle seat plate 7. Thus, by providing the upper tensile plates 5 and the lower tensile plates 11, when subjected to vertical seismic forces, the bridge drives the upper seat plate 8 upward, into contact with the upper tensile plate 5, and the force is transmitted to the lower seat plate 4. As the lower seat plate 4 moves upward, it contacts the lower tensile plate 11, and the force is further transmitted to the base plate 1 and then to the pier, thereby limiting the vertical displacement of the bridge and satisfying the vertical tensile resistance function under seismic conditions. The upper tensile plate 5 and the lower seat plate 4 , and the lower tensile plate 11 and the limit baffle 13 can all be connected by fasteners.

[0043] A sinking structure 14 is provided at one end of the lower seat plate 4 close to the upper seat plate 8, and the middle seat plate 7 can abut against the sinking structure 14. Therefore, during an earthquake, if the bridge drives the middle seat plate 7 to rotate vertically under the action of the seismic force, when the vertical rotation exceeds the limit angle, the middle seat plate 7 will contact the sinking structure 14, limiting the excessive vertical rotation of the middle seat plate 7, so as to meet the vertical rotation limiting function under earthquake conditions.

[0044] In the vertical direction, a guide friction pair 6 is set between the outer edge side wall of the upper seat plate 8 and the side wall of the sinking platform structure 14, which can not only play a role in shock absorption and energy consumption during the vertical displacement between the upper seat plate 8 and the lower seat plate 4, but also can resist the longitudinal horizontal force to a certain extent.

[0045] In addition, the fixed limit support 200 includes a stop block 12 connected to the upper seat plate 8. In the transverse direction, the stop block 12 is correspondingly arranged on the outer side of the two ends of the lower seat plate 4, and the end of the lower seat plate 4 can abut against the corresponding stop block 12, thereby forming a second transverse constraint structure. During normal use of the system, it can further provide transverse constraints on the basis of the first transverse constraint structure to ensure the transverse constraint and transverse limiting function under normal working conditions; when an earthquake occurs, the transverse bridge seismic force needs to be greater than the ultimate bearing capacity of the limit plate 3 and the stop block 12 at the same time, so that both of them are destroyed to release the transverse constraint of the system, thereby improving the transverse constraint capacity of the system and improving the shock absorption and earthquake resistance of the system.

[0046] To sum up, when the system described in the present application is operating normally, the longitudinal movable support 100 and the fixed limit support 200 can realize the functions of vertical bearing and vertical rotation through their respective planar friction pairs 9 and spherical friction pairs 10; the planar friction pair 9 of the longitudinal movable support 100 realizes the normal sliding function of the bridge; the guide friction pair 6, limit plate 3 and other components of the longitudinal movable support 100 cooperate with the stop block 12 of the fixed limit support 200 to jointly realize the function of resisting lateral horizontal forces, and the guide friction pair 6 and limit plate 3 of the fixed limit support 200 realize the function of resisting longitudinal horizontal forces.

[0047] During an earthquake, when the longitudinal bridge-direction seismic force is greater than the ultimate bearing capacity of the limit plate 3 of the fixed limit support 200, the limit plate 3 of the fixed limit support 200 is destroyed and the constraint is released, and the lower surface of the lower seat plate 4 and the upper surface of the base plate 1 undergo longitudinal relative displacement, and play a role in shock absorption and energy dissipation through the energy-absorbing friction pair 2; as the lower seat plate 4 and the base plate 1 undergo longitudinal relative displacement, when the longitudinal ultimate displacement is reached, the limit baffle 13 of the fixed limit support 200 plays a role, limiting the slippage of the lower seat plate 4 and the entire bridge system in the longitudinal bridge direction, and preventing the occurrence of falling beams.

[0048] When the transverse seismic force is greater than the combined ultimate bearing capacity of the limit plate 3 of the longitudinal movable support 100 and the stop block 12 of the fixed limit support 200, the two are destroyed and the constraints are released, and the lower surface of the lower seat plate 4 and the upper surface of the base plate 1 undergo a transverse relative displacement, and play a role in shock absorption and energy dissipation through the energy-absorbing friction pair 2; as the lower seat plate 4 and the base plate 1 undergo a transverse relative displacement, when the transverse ultimate displacement is reached, the limit baffle 13 of the longitudinal movable support 100 plays a role, limiting the sliding of the lower seat plate 4 and the entire bridge system in the transverse direction of the bridge, and preventing the occurrence of beam falling.

[0049] Under the action of earthquake force, the bridge drives the middle seat plate 7 to rotate vertically. When the vertical rotation exceeds the limit angle, for the longitudinal movable support 100 and the fixed limit support 200, their respective middle seat plates 7 will contact the corresponding sinking platform structure 14, limiting the excessive vertical rotation of the middle seat plate 7 to meet the vertical rotation limit function under earthquake conditions.

[0050] When subjected to vertical seismic forces, the longitudinal movable supports 100 and the fixed limit supports 200 limit the vertical displacement of the bridge through their respective upper tensile plates 5 and lower tensile plates 11, and transmit the vertical seismic forces to the piers, thereby realizing the vertical tensile function under seismic conditions.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bridge shock-absorbing support system, characterized in that: The system comprises a longitudinal movable support (100) arranged on a movable pier of a bridge, and a fixed limit support (200) arranged on a fixed pier of the bridge, wherein the longitudinal movable support (100) comprises a first transverse constraint structure, a transverse limit structure, a vertical tensile limit structure, and a vertical rotation limit structure, and the fixed limit support (200) comprises a second transverse constraint structure, a first longitudinal constraint structure, a longitudinal limit structure, a vertical tensile limit structure, and a vertical rotation limit structure.

2. A bridge shock-absorbing support system according to claim 1, characterized in that: The longitudinal movable support (100) comprises a base plate (1), a lower base plate (4), a middle base plate (7), and an upper base plate (8) arranged from bottom to top, a spherical friction pair (10) is arranged between the lower base plate (4) and the middle base plate (7), and a plane friction pair (9) is arranged between the middle base plate (7) and the upper base plate (8); an upwardly extending limit baffle (13) is arranged on the outer edge of the base plate (1) for laterally limiting the lower base plate (4), a limit plate (3) is arranged on the limit baffle (13), and the limit plate (3) can abut against the lower base plate (4) for laterally constraining the lower base plate (4).

3. A bridge shock-absorbing support system according to claim 2, characterized in that: An energy-consuming friction pair (2) is provided between the base plate (1) and the lower base plate (4).

4. A bridge shock-absorbing support system according to claim 2, characterized in that: An upper tensile plate (5) is provided on the upper surface of the lower seat plate (4), and the upper tensile plate (5) is located above at least a portion of the plate structure of the upper seat plate (8). In vertical projection, the projection of the upper tensile plate (5) partially overlaps with the projection of the upper seat plate (8); a lower tensile plate (11) is provided on the limit baffle (13), and the lower tensile plate (11) is located above at least a portion of the plate structure of the middle seat plate (7). In vertical projection, the projection of the lower tensile plate (11) partially overlaps with the projection of the middle seat plate (7).

5. The bridge shock-absorbing support system according to claim 2, characterized in that: A sinking structure (14) is provided at one end of the lower seat plate (4) close to the upper seat plate (8), and the middle seat plate (7) can abut against the sinking structure (14); in the vertical direction, a guide friction pair (6) is provided between the outer edge side wall of the upper seat plate (8) and the side wall of the sinking structure (14).

6. The bridge shock-absorbing support system according to claim 1, characterized in that: The fixed limit support (200) comprises a base plate (1), a lower seat plate (4), a middle seat plate (7), and an upper seat plate (8) arranged from bottom to top, a spherical friction pair (10) is arranged between the lower seat plate (4) and the middle seat plate (7), and a plane friction pair (9) is arranged between the middle seat plate (7) and the upper seat plate (8); an upwardly extending limit baffle (13) is arranged on the outer edge of the base plate (1) for longitudinally limiting the lower seat plate (4), a limit plate (3) is arranged on the limit baffle (13), and the limit plate (3) can abut against the lower seat plate (4) for longitudinally constraining the lower seat plate (4).

7. The bridge shock-absorbing support system according to claim 6, characterized in that: The fixed limiting support (200) includes a stopper (12) connected to the upper seat plate (8). In the transverse direction, the stopper (12) is correspondingly arranged on the outer sides of the two ends of the lower seat plate (4), and the end of the lower seat plate (4) can abut against the corresponding stopper (12).

8. The bridge shock-absorbing support system according to claim 6, characterized in that: An energy-consuming friction pair (2) is provided between the base plate (1) and the lower base plate (4).

9. The bridge shock-absorbing support system according to claim 6, characterized in that: An upper tensile plate (5) is provided on the upper surface of the lower seat plate (4), and the upper tensile plate (5) is located above at least a portion of the plate structure of the upper seat plate (8). In vertical projection, the projection of the upper tensile plate (5) partially overlaps with the projection of the upper seat plate (8); a lower tensile plate (11) is provided on the limit baffle (13), and the lower tensile plate (11) is located above at least a portion of the plate structure of the middle seat plate (7). In vertical projection, the projection of the lower tensile plate (11) partially overlaps with the projection of the middle seat plate (7).

10. The bridge shock-absorbing support system according to claim 6, characterized in that: A sinking structure (14) is provided at one end of the lower seat plate (4) close to the upper seat plate (8), and the middle seat plate (7) can abut against the sinking structure (14); in the vertical direction, a guide friction pair (6) is provided between the outer edge side wall of the upper seat plate (8) and the side wall of the sinking structure (14).

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