A design method for bridge AIFB bearings with spatial damping and self-repairing function

Abstract

The present invention discloses a design method for a bridge AIFB bearing with a spatial damping self-repairing function, which belongs to the technical field of bridge shock absorption and aims to solve the problem that the existing bridge shock absorption structure cannot achieve active shock absorption. The AIFB bearing includes a base, a vertical shock absorption adjustment member, a supporting base plate, an X-direction damping shock absorber, an X-direction adjustment plate, a Y-direction damping shock absorber and a Y-direction adjustment plate from bottom to top. In the case of small vector displacement, the X-direction adjustment plate and the Y-direction adjustment plate begin to move back and forth freely, offsetting the seismic displacement in the X and Y directions respectively, and reducing the vibration amplitude of the box girder; in the case of large vector displacement, the upper computer adjusts the X-direction damping shock absorber and the Y-direction damping shock absorber to move back and forth in the opposite direction of the vibration displacement according to the displacement amount and frequency, so as to offset the displacement amount of the vibration. In this way, active shock reduction can be carried out under the action of high-intensity earthquakes to improve the seismic performance of bridge bearings.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge seismic design, and in particular relates to a design method for a bridge AIFB bearing with spatial damping self-repairing function. Background Art

[0002] For simply supported beam bridges and continuous beam bridges affected by earthquakes, the time and location of earthquakes are unpredictable, and they are characterized by short duration and intense energy release. Bridge earthquake hazards mainly include the following four aspects: (1) collapse of the superstructure; (2) damage to supporting connectors, especially bridge bearings, expansion joints, shear members, supporting connectors, etc., which are relatively weak parts of the bridge structure system in terms of seismic performance; (3) damage to abutments and piers; and (4) damage to the foundation.

[0003] Conventional seismic control factors are single, earthquake control is insufficient, design awareness is insufficient, and protective measures are often weak and passive. Once a high-intensity earthquake strikes, the protected objects will fail. Summary of the Invention

[0004] The present invention provides a design method for a bridge AIFB bearing with spatial damping self-repairing function, aiming to provide a new type of bridge bearing that can actively reduce vibration under high-intensity earthquakes and improve the seismic performance of the bridge bearing.

[0005] To this end, the present invention adopts the following technical solutions:

[0006] A design method for an AIFB bearing with spatial damping and self-repairing function for a bridge is disclosed. The AIFB bearing is fixed between the top of a bridge pier and the bottom of a box girder. The AIFB bearing is used to actively reduce vibration for the box girder. The design method for the AIFB bearing includes the following steps:

[0007] 1) Design the AIFB bearing size and material according to bridge design codes and specifications to ensure the AIFB bearing's compressive strength meets the load-bearing requirements;

[0008] 2) Design the structure of the AIFB support according to the vibration reduction requirements. Specifically, the AIFB support consists of a base, a vertical vibration reduction adjustment member, a support base plate, an X-direction damping shock absorber, an X-direction adjustment plate, a Y-direction damping shock absorber, and a Y-direction adjustment plate.

[0009] The lower part of the base is cast and fixed on the top of the pier, the upper part of the base is exposed above the pier, and the upper surface of the base is horizontal;

[0010] The four corners of the base are respectively provided with vertical slots, and vertical shock-absorbing adjustment members are respectively connected to the four slots, and the upper ends of the vertical shock-absorbing adjustment members extend out of the slots;

[0011] The supporting base plate is placed horizontally above the base, and the bottom surface of the supporting base plate contacts the top of the vertical shock-absorbing adjustment member, which is used to adjust the horizontality of the supporting base plate;

[0012] The X-direction damping shock absorber is installed on the upper surface of the supporting base plate. The X-direction damping shock absorber is connected to the horizontal X-direction adjustment plate in a rolling manner. The X-direction damping shock absorber is used to adjust the displacement of the X-direction adjustment plate in the X direction.

[0013] A Y-direction damping shock absorber is installed above the X-direction adjustment plate. A horizontal Y-direction adjustment plate is connected to the Y-direction damping shock absorber in a rolling manner. The Y-direction damping shock absorber is used to adjust the displacement of the Y-direction adjustment plate in the Y direction.

[0014] The top of the Y-axis adjustment plate is connected to the bottom box beam;

[0015] 3) An X-axis laser-millimeter-wave radar for measuring X-axis displacement is installed at the end of the X-axis adjustment plate, and the X-axis laser-millimeter-wave radar is connected to the X-axis damping shock absorber signal; a Y-axis laser-millimeter-wave radar for measuring Y-axis displacement is installed at the end of the Y-axis adjustment plate, and the Y-axis laser-millimeter-wave radar is connected to the Y-axis damping shock absorber signal;

[0016] It also includes a communication module and a host computer. The communication module is installed on the AIFB support and is connected to the host computer by wireless signal. The host computer is respectively connected to the X-axis damping shock absorber, the X-axis laser-millimeter wave radar, the Y-axis damping shock absorber, and the Y-axis laser-millimeter wave radar signal. The host computer is used to control the active movement of the X-axis damping shock absorber and the Y-axis damping shock absorber.

[0017] 4) Laser-millimeter wave radar monitoring method

[0018] When the vector displacement is less than the design threshold:

[0019] In the case of small vector displacement, the X-axis laser-millimeter-wave radar and the Y-axis laser-millimeter-wave radar respectively detect that the displacement is less than the design threshold and upload the monitored displacement and frequency signals to the host computer. The X-axis adjustment plate and the Y-axis adjustment plate begin to move back and forth freely, respectively offsetting the seismic displacement in the X and Y directions and reducing the vibration amplitude of the box girder.

[0020] When the vector lies above the design threshold:

[0021] In the case of large vector displacement, the X-axis laser-millimeter-wave radar and the Y-axis laser-millimeter-wave radar respectively detect that the displacement is greater than the designed threshold and upload the monitored displacement signal and frequency signal to the host computer. Based on the displacement and frequency, the host computer adjusts the X-axis damping shock absorber and the Y-axis damping shock absorber to move back and forth in the opposite direction of the vibration displacement to offset the vibration displacement.

[0022] Until the displacement is lower than the designed threshold, the X-axis adjustment plate and the Y-axis adjustment plate begin to move back and forth freely;

[0023] After the X- and Y-direction vibration adjustments are completed, the vertical shock-absorbing adjustment parts on one side are controlled to extend and retract according to the vertical displacement ΔZ to adjust the straightness of the bridge; the maximum adjustment angle does not exceed 10°.

[0024] Furthermore, the X-direction damping shock absorber and the Y-direction damping shock absorber include a plurality of electrically controlled balls arranged at intervals.

[0025] Furthermore, rectangular grooves are respectively provided on the top surface of the supporting base plate, the top and bottom surfaces of the X-direction adjustment plate, and the bottom surface of the Y-direction adjustment plate, and the grooves are of relative size and face each other; the electronically controlled balls are located in the grooves, and the grooves are used to limit the maximum displacement of the X-direction damping shock absorber and the Y-direction damping shock absorber.

[0026] Furthermore, a rectangular frame is connected to the electrically controlled balls of the X-axis damping shock absorber, and both ends of each electrically controlled ball are rotatably connected to the rectangular frame, and the rectangular frame is used to limit the position of the electrically controlled balls;

[0027] The ends of the electronically controlled balls are sequentially connected to control the synchronous linkage of the electronically controlled balls; the electronically controlled balls are connected to a servo motor through a flange structure, and the servo motor signal is connected to the host computer, and the servo motor is used to drive the electronically controlled balls to rotate;

[0028] The Y-direction damping shock absorber includes the same rectangular frame and servo motor.

[0029] Furthermore, the vertical shock-absorbing adjustment member is a ball screw lifting device or a hydraulic lifting device, and the vertical shock-absorbing adjustment member is connected to the host computer through a signal.

[0030] Furthermore, it also includes an X-direction guide for guiding the movement of the X-direction adjustment plate, and a Y-direction guide for guiding the movement of the Y-direction adjustment plate;

[0031] The X-direction guide comprises two slideways provided on the upper surface of the support base plate. The two slideways are parallel to the moving direction of the X-direction damping shock absorber and are respectively located at the left and right ends of the support base plate. Two vertically downwardly directed electric limit rods are fixed on the bottom surface of the X-direction adjustment plate. The two electric limit rods are arranged opposite to the two slideways.

[0032] The Y-direction guide includes two slides opened on the upper surface of the X-direction adjustment plate. The two slides are parallel to the moving direction of the Y-direction damping shock absorber and are located at the upper and lower ends of the Y-direction adjustment plate respectively; two vertically downward electric limit rods are fixed on the bottom surface of the Y-direction adjustment plate, and the two electric limit rods are arranged opposite to the two slides.

[0033] Furthermore, a circular positioning hole is provided at the center of the slideway. When the AIFB support is in the initial state, the electric control limit rod is extended and can pass through the positioning hole to lock the X-direction adjustment plate and the Y-direction adjustment plate of the AIFB support.

[0034] Furthermore, when an earthquake occurs, the electrically controlled limit rod retracts outside the positioning hole, and the AIFB support begins to actively reduce vibration; after the earthquake ends, the electrically controlled limit rod extends into the positioning hole, locking the AIFB support.

[0035] The calculation method of the host computer of the present invention is as follows:

[0036] 1) When the vector displacement is less than the design threshold

[0037] LiDAR wave vector displacement:

[0038]

[0039] 2) When the vector displacement is greater than the design threshold

[0040]

[0041] The beneficial effects of the present invention are:

[0042] 1. The AIFB support of the present invention is equipped with three-dimensional vibration-damping structures in the X, Y, and Z directions. The X and Y directions are active vibration-damping structures. When the earthquake displacement vector exceeds the design threshold, the host computer controls the X- and Y-direction damping shock absorbers to move in the opposite direction of the vibration displacement to offset part of the earthquake displacement, reduce the vibration amplitude of the upper box girder, and improve the stability of the box girder, thereby achieving active vibration reduction.

[0043] 2. The AIFB support of the present invention is equipped with an electrically controlled limit rod, which can guide the X-axis damping shock absorber and the Y-axis damping shock absorber. In the absence of an earthquake, it can also realize a self-locking function to prevent the AIFB support from moving freely, thereby improving the stability of the AIFB support under non-seismic conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a top view of the installation of the AIFB support of the present invention;

[0045] Figure 2 This is a front view of the installation of the AIFB support of the present invention;

[0046] Figure 3 is a front view of the AIFB support of the present invention;

[0047] Figure 4 is a top view of the AIFB support of the present invention;

[0048] In the figure: 1-bridge pier, 2-box girder, 3-AIFB support, 4-base, 5-support base plate, 6-X-direction adjustment plate, 7-electrically controlled limit rod, 8-Y-direction adjustment plate, 9-X-direction damping shock absorber, 10-Y-direction damping shock absorber, 11-X-direction laser-millimeter wave radar, 12-Y-direction laser-millimeter wave radar, 13-slot, 14-vertical shock absorption adjustment member, 15-slide, 16-positioning hole. DETAILED DESCRIPTION

[0049] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0050] like Figure 1 and 2 As shown, a design method for a bridge AIFB bearing with spatial damping self-repairing function is provided. The AIFB bearing 3 is fixed between the top of the pier 1 and the bottom of the box girder 2. The AIFB bearing 3 is used to reduce vibration of the box girder 2. The design method of the AIFB bearing 3 includes the following steps:

[0051] 1) The size and material of the AIFB bearing 3 are designed according to the bridge design code and specifications to ensure that the compressive strength of the AIFB bearing 3 meets the load-bearing requirements. The main structure of the AIFB is made of high-strength corrosion-resistant steel to increase the service life of the AIFB bearing 3.

[0052] 2) Design the structure of AIFB support 3 according to the vibration reduction requirements, as follows: Figure 3 and 4 As shown, the AIFB support 3 includes, from bottom to top, a base 4, a vertical shock absorbing adjustment member 14, a supporting base plate 5, an X-direction damping shock absorber 9, an X-direction adjustment plate 6, a Y-direction damping shock absorber 10 and a Y-direction adjustment plate 8.

[0053] The base 4 is in the shape of a cube, with the lower part cast and fixed on the top of the pier 1 for transferring the bearing force downward. The upper part of the base 4 is exposed above the pier 1, and the upper surface of the base 4 is horizontal.

[0054] The four corners of the base 4 are provided with vertical slots 13, each of which is connected to a vertical damping adjustment member 14. The upper end of the vertical damping adjustment member 14 extends out of the slot 13. The vertical damping adjustment member 14 is a ball screw lifting device or a hydraulic lifting device, and the signal of the vertical damping adjustment member 14 is connected to the host computer.

[0055] The support base plate 5 is placed horizontally above the base 4 , and the bottom surface of the support base plate 5 contacts the top of the vertical shock-absorbing adjustment member 14 . The vertical shock-absorbing adjustment member 14 is used to adjust the horizontality of the support base plate 5 .

[0056] The X-direction damping shock absorber 9 is rollingly mounted on the upper surface of the supporting base plate 5. The X-direction damping shock absorber 9 is rollingly connected to the horizontal X-direction adjustment plate 6 above the X-direction damping shock absorber 9, and the X-direction damping shock absorber 9 is used to adjust the displacement of the X-direction adjustment plate 6 in the X-direction; the X-direction damping shock absorber 10 is rollingly connected to the Y-direction damping shock absorber 10 above the X-direction adjustment plate 6, and the Y-direction damping shock absorber 10 is rollingly connected to the horizontal Y-direction adjustment plate 8 above the Y-direction damping shock absorber 10, and the Y-direction damping shock absorber 10 is used to adjust the displacement of the Y-direction adjustment plate 8 in the Y-direction; the top of the Y-direction adjustment plate 8 supports the box girder 2.

[0057] The X-axis damping shock absorber 9 and the Y-axis damping shock absorber 10 include several electrically controlled balls arranged at intervals. Rectangular notches 13 are provided on the top surface of the support base plate 5, the top and bottom surfaces of the X-axis adjustment plate 6, and the bottom surface of the Y-axis adjustment plate 8. These notches 13 are of opposite size and face each other. The electrically controlled balls are positioned within these notches 13, which serve to limit the maximum displacement of the X-axis damping shock absorber 9 and the Y-axis damping shock absorber 10. The electrically controlled balls of the X-axis damping shock absorber 9 are connected to a rectangular frame, with each ball rotatably connected to the frame at both ends. The rectangular frame serves to limit the position of the balls. The ends of the balls are sequentially connected in a transmission manner to control their synchronous linkage. The balls are connected to servo motors via flange structures, and the servo motor signals are connected to a host computer. The Y-axis damping shock absorber 10 includes the same rectangular frame and servo motor.

[0058] It also includes an X-direction guide for guiding the movement of the X-direction adjustment plate 6 and a Y-direction guide for guiding the movement of the Y-direction adjustment plate 8.

[0059] The X-direction guide comprises two slideways 15 provided on the upper surface of the support base plate 5, and the two slideways 15 are parallel to the moving direction of the X-direction damping shock absorber 9 and are respectively located at the left and right ends of the support base plate 5; two vertically downward electric control limit rods 7 are fixed on the bottom surface of the X-direction adjustment plate 6, and the two electric control limit rods 7 are arranged opposite to the two slideways 15; the Y-direction guide comprises two slideways 15 provided on the upper surface of the X-direction adjustment plate (6), and the two slideways 15 are parallel to the moving direction of the Y-direction damping shock absorber 10 and are respectively located at the upper and lower ends of the Y-direction adjustment plate 8; two vertically downward electric control limit rods 7 are fixed on the bottom surface of the Y-direction adjustment plate 8, and the two electric control limit rods 7 are arranged opposite to the two slideways 15. A circular positioning hole 16 is provided at the center of the slideway 15, and in the initial state of the AIFB support 3, the electric control limit rod 7 is extended to penetrate into the positioning hole 16 to lock the X-direction adjustment plate 6 and the Y-direction adjustment plate 8 of the AIFB support 3.

[0060] When an earthquake occurs, the electric control limit rod 7 retracts to the outside of the positioning hole 16, and the AIFB support 3 starts to actively reduce vibration; after the earthquake ends, the electric control limit rod 7 extends to the inside of the positioning hole 16, locking the AIFB support 3.

[0061] 3) An X-direction laser-millimeter-wave radar 11 for measuring X-direction displacement is installed at the end of the X-direction adjustment plate 6, and the X-direction laser-millimeter-wave radar 11 is connected to the X-direction damping shock absorber 9 for signal transmission. A Y-direction laser-millimeter-wave radar 12 for measuring Y-direction displacement is installed at the end of the Y-direction adjustment plate 8, and the Y-direction laser-millimeter-wave radar 12 is connected to the Y-direction damping shock absorber 10 for signal transmission.

[0062] It also includes a communication module and a host computer. The communication module is installed on the AIFB support 3 and is connected to the host computer by wireless signal. The host computer is respectively connected to the X-direction damping shock absorber 9, the X-direction laser-millimeter wave radar 11, the Y-direction damping shock absorber 10, and the Y-direction laser-millimeter wave radar 12. The controller is used to control the movement of the X-direction damping shock absorber 9 and the Y-direction damping shock absorber 10.

[0063] 4) Laser-millimeter wave radar monitoring method

[0064] When the vector displacement is less than the design threshold:

[0065] In the case of small vector displacement, the X-axis laser-millimeter-wave radar 11 and the Y-axis laser-millimeter-wave radar 12 respectively detect that the displacement is less than the design threshold, the electric control limit rod 7 retracts outside the positioning hole 16, and the X-axis adjustment plate 6 and the Y-axis adjustment plate 8 begin to move back and forth freely, respectively offsetting the seismic displacement in the X and Y directions and reducing the vibration amplitude of the box girder 2; after the earthquake stops, the electric control limit rod 7 extends into the positioning hole 16, locking the AIFB support 3.

[0066] When the vector lies above the design threshold:

[0067] In the case of large vector displacement, the X-axis laser-millimeter-wave radar 11 and the Y-axis laser-millimeter-wave radar 12 respectively detect that the displacement is greater than the design threshold and upload the monitored displacement signal and frequency signal to the host computer. The host computer then adjusts the X-axis damping shock absorber 9 and the Y-axis damping shock absorber 10 in the opposite direction of the vibration displacement based on the displacement and frequency to offset the vibration displacement. When the displacement is lower than the design threshold, the X-axis adjustment plate 6 and the Y-axis adjustment plate 8 begin to move back and forth freely.

[0068] After the X-direction and Y-direction vibration adjustments are completed, the vertical shock-absorbing adjustment member 14 on one side is controlled to extend and retract according to the vertical displacement ΔZ to adjust the straightness of the bridge; the maximum adjustment angle does not exceed 10°.

Claims

1. A design method for bridge AIFB bearings with spatial damping self-repairing function, characterized in that: The AIFB bearing (3) is fixed between the top of the pier (1) and the bottom of the box girder (2). The AIFB bearing (3) is used to actively reduce vibration of the box girder (2). The design method of the AIFB bearing (3) includes the following steps: 1) Design the size and material of the AIFB bearing (3) according to the bridge design code and bridge specifications to ensure that the compressive strength of the AIFB bearing (3) meets the load-bearing requirements; 2) The structure of the AIFB support (3) is designed according to the shock absorption requirements, specifically as follows: the AIFB support (3) includes, from bottom to top, a base (4), a vertical shock absorption adjustment member (14), a support base plate (5), an X-direction damping shock absorber (9), an X-direction adjustment plate (6), a Y-direction damping shock absorber (10), and a Y-direction adjustment plate (8); The lower part of the base (4) is cast and fixed on the top of the pier (1), the upper part of the base (4) is exposed above the pier (1), and the upper surface of the base (4) is horizontal; The four corners of the base (4) are respectively provided with vertical slots (13), and vertical shock-absorbing adjustment members (14) are respectively connected to the four slots (13), and the upper ends of the vertical shock-absorbing adjustment members (14) extend out of the slots (13); The supporting base plate (5) is placed horizontally above the base (4), and the bottom surface of the supporting base plate (5) contacts the top of the vertical shock-absorbing adjustment member (14), and the vertical shock-absorbing adjustment member (14) is used to adjust the horizontality of the supporting base plate (5); The X-direction damping shock absorber (9) is mounted on the upper surface of the supporting base plate (5), and a horizontal X-direction adjustment plate (6) is rollingly connected above the X-direction damping shock absorber (9). The X-direction damping shock absorber (9) is used to adjust the displacement of the X-direction adjustment plate (6) in the X direction; A Y-direction damping shock absorber (10) is installed above the X-direction adjustment plate (6), and a horizontal Y-direction adjustment plate (8) is rollingly connected above the Y-direction damping shock absorber (10). The Y-direction damping shock absorber (10) is used to adjust the displacement of the Y-direction adjustment plate (8) in the Y direction; The top of the Y-direction adjustment plate (8) is connected to the bottom box beam (2); 3) An X-direction laser-millimeter wave radar (11) for measuring X-direction displacement is installed at the end of the X-direction adjustment plate (6), and the X-direction laser-millimeter wave radar (11) is connected to the X-direction damping shock absorber (9) for signal; a Y-direction laser-millimeter wave radar (12) for measuring Y-direction displacement is installed at the end of the Y-direction adjustment plate (8), and the Y-direction laser-millimeter wave radar (12) is connected to the Y-direction damping shock absorber (10) for signal; It also includes a communication module and a host computer. The communication module is installed on the AIFB support (3) and is connected to the host computer via wireless signals. The host computer is respectively connected to the X-direction damping shock absorber (9), the X-direction laser-millimeter wave radar (11), the Y-direction damping shock absorber (10), and the Y-direction laser-millimeter wave radar (12) via signals. The host computer is used to control the active movement of the X-direction damping shock absorber (9) and the Y-direction damping shock absorber (10); 4) Laser-millimeter wave radar monitoring method When the vector displacement is less than the design threshold: In the case of small vector displacement, the X-axis laser-millimeter wave radar (11) and the Y-axis laser-millimeter wave radar (12) respectively detect that the displacement is less than the design threshold, and upload the monitored displacement signal and frequency signal to the host computer; the X-axis adjustment plate (6) and the Y-axis adjustment plate (8) begin to move back and forth freely, respectively offsetting the earthquake displacement in the X and Y directions, and reducing the vibration amplitude of the box girder (2); When the vector lies above the design threshold: In the case of large vector displacement, the X-axis laser-millimeter wave radar (11) and the Y-axis laser-millimeter wave radar (12) respectively detect that the displacement is greater than the design threshold, and upload the monitored displacement signal and frequency signal to the host computer; the host computer adjusts the X-axis damping shock absorber (9) and the Y-axis damping shock absorber (10) to move back and forth in the opposite direction of the vibration displacement according to the displacement and frequency to offset the vibration displacement; Until the displacement is lower than the designed threshold, the X-axis adjustment plate (6) and the Y-axis adjustment plate (8) begin to move back and forth freely; After the X-direction and Y-direction vibration adjustments are completed, the vertical shock-absorbing adjustment member (14) on one side is controlled to extend and retract according to the vertical displacement ΔZ to adjust the straightness of the bridge; the maximum adjustment angle does not exceed 10°.

2. The design method of bridge AIFB bearing with spatial damping self-repairing function according to claim 1 is characterized in that: The X-direction damping shock absorber (9) and the Y-direction damping shock absorber (10) include a plurality of electrically controlled balls arranged at intervals.

3. The design method of bridge AIFB bearing with spatial damping self-repairing function according to claim 2 is characterized in that: Rectangular grooves are respectively provided on the top surface of the supporting base plate (5), the top surface and bottom surface of the X-direction adjustment plate (6), and the bottom surface of the Y-direction adjustment plate (8), and the grooves are equal in size and face each other. The electrically controlled balls are located in the grooves, and the grooves are used to limit the maximum displacement of the X-direction damping shock absorber (9) and the Y-direction damping shock absorber (10).

4. The design method of bridge AIFB bearing with spatial damping self-repairing function according to claim 3 is characterized in that: The electric control balls of the X-direction damping shock absorber (9) are connected to a rectangular frame, and both ends of each electric control ball are rotatably connected to the rectangular frame, and the rectangular frame is used to limit the position of the electric control ball; The ends of the electronically controlled balls are sequentially connected to control the synchronous linkage of the electronically controlled balls; the electronically controlled balls are connected to a servo motor through a flange structure, and the servo motor signal is connected to the host computer, and the servo motor is used to drive the electronically controlled balls to rotate; The Y-direction damping shock absorber (10) comprises the same rectangular frame and a servo motor.

5. The design method of bridge AIFB bearing with spatial damping self-repairing function according to claim 1 is characterized in that: The vertical shock-absorbing adjustment member (14) is a ball screw lifting device or a hydraulic lifting device, and the vertical shock-absorbing adjustment member (14) is connected to the host computer via a signal.

6. The design method of bridge AIFB bearing with spatial damping self-repairing function according to claim 1 is characterized in that: It also includes an X-direction guide for guiding the movement of the X-direction adjustment plate (6), and a Y-direction guide for guiding the movement of the Y-direction adjustment plate (8); The X-direction guide member includes two slideways (15) provided on the upper surface of the support base plate (5), the two slideways (15) being parallel to the moving direction of the X-direction damping shock absorber (9) and being respectively located at the left and right ends of the support base plate (5); two vertically downwardly directed electric control limit rods (7) are fixed on the bottom surface of the X-direction adjustment plate (6), and the two electric control limit rods (7) are arranged opposite to the two slideways (15); The Y-direction guide member includes two slideways (15) provided on the upper surface of the X-direction adjustment plate (6), and the two slideways (15) are parallel to the moving direction of the Y-direction damping shock absorber (10) and are respectively located at the upper and lower ends of the Y-direction adjustment plate (8); two vertically downwardly directed electric control limit rods (7) are fixed on the bottom surface of the Y-direction adjustment plate (8), and the two electric control limit rods (7) are arranged opposite to the two slideways (15).

7. The design method of bridge AIFB bearing with spatial damping self-repairing function according to claim 6 is characterized in that: A circular positioning hole (16) is provided at the center of the slideway (15). When the AIFB support (3) is in the initial state, the electric control limit rod (7) is extended and can penetrate into the positioning hole (16) to lock the X-direction adjustment plate (6) and the Y-direction adjustment plate (8) of the AIFB support (3).

8. The design method of bridge AIFB bearing with spatial damping self-repairing function according to claim 7 is characterized in that: When an earthquake occurs, the electric control limit rod (7) retracts to the outside of the positioning hole (16), and the AIFB support (3) starts to actively reduce shock; after the earthquake ends, the electric control limit rod (7) extends to the inside of the positioning hole (16), locking the AIFB support (3).

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