A novel intermittent energy dissipation and anti-fall beam integrated device

Abstract

This invention discloses a novel intermittent energy dissipation and anti-falling beam integrated device, belonging to the technical field of bridge anti-falling beam technology. It includes a sliding steel plate connector and a pressure plate connector, which are respectively connected to the bridge deck and the pier. One end of the sliding steel plate connector has several sliding steel plates, which are vertically evenly distributed and have one end rotatably connected to the connector. One end of the pressure plate connector has several intermediate pressure plates, which are vertically evenly distributed and have one end rotatably connected to the connector. The sliding steel plates and intermediate pressure plates are vertically spaced apart and in contact with each other. Mirror-finished stainless steel plates are provided on the contact surfaces of the sliding steel plates and the intermediate pressure plates. This technical solution is used to improve the anti-falling beam effect of bridges.

Description

Technical Field

[0001] This invention belongs to the field of bridge beam anti-falling technology, specifically relating to a novel intermittent energy dissipation and anti-falling beam integrated device. Background Technology

[0002] Small- and medium-span bridges are often equipped with economical plate rubber bearings, which lack upper and lower anchorage measures. This design and construction method allows the plate rubber bearings to slide and rub during earthquakes, forming a seismic isolation system with the bridge to reduce structural damage caused by earthquakes. However, it also increases the displacement response of the main girder and the risk of girder collapse. If the main girder falls longitudinally, it may collide with piers or abutments, causing secondary damage. Existing anti-girder collapse devices commonly include stop blocks, steel cable limiters, and various types of metal dampers.

[0003] While devices such as stop blocks and cable limiters possess significant stiffness and strength, they lack energy dissipation capabilities, limiting their effectiveness in protecting bridge structural integrity and reducing structural damage. Metal dampers offer excellent energy dissipation capabilities; common structural forms include X-shaped steel plates, triangular steel plates, and steel curved plates. However, their deformation capacity is limited and cannot meet the displacement requirements of sliding plate rubber bearings. Further modifications to the structural form, such as U-shaped and E-shaped metal dampers, offer advantages like stable energy dissipation and large deformation capacity, but lack stable and controllable limiting capabilities and exhibit significant residual displacement. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a novel intermittent energy dissipation and anti-falling beam integrated device to solve the problems mentioned in the background art of the shortcomings of the existing anti-falling beam devices in actual use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention discloses a novel intermittent energy dissipation and anti-falling beam integrated device, comprising a sliding steel plate connector and a pressure plate connector. One end of the sliding steel plate connector is provided with a plurality of sliding steel plates, which are vertically and evenly distributed, with one end of each sliding steel plate rotatably connected to the sliding steel plate connector. One end of the pressure plate connector is provided with a plurality of intermediate pressure plates, which are vertically and evenly distributed, with one end of each intermediate pressure plate rotatably connected to the pressure plate connector. The plurality of sliding steel plates and intermediate pressure plates are vertically spaced apart, and the plurality of sliding steel plates and intermediate pressure plates are in contact with each other; the plurality of sliding steel plates and the intermediate pressure plates... Each of the contact surfaces is provided with a mirror-finished stainless steel plate, and each of the contact surfaces of the intermediate pressure plates and the sliding steel plates is provided with a friction plate. The mirror-finished stainless steel plate and the friction plate are in a pressing contact arrangement. Each of the sliding steel plates and the mirror-finished stainless steel plates is provided with a number of first sliding grooves arranged side by side. Each of the intermediate pressure plates and the friction plates is provided with a number of rows of bolt holes arranged side by side. The positions of the rows of bolt holes correspond to the positions of the first sliding grooves. Each of the bolt holes in the rows of bolt holes is provided with a high-strength bolt assembly. The center of each of the high-strength bolt assemblies is located in the first sliding groove. The high-strength bolt assemblies are used to apply a pressing force to the sliding steel plates and the intermediate pressure plates.

[0006] Furthermore, the high-strength bolt assembly includes a locking screw, both ends of which are provided with locking nuts, and shear-resistant steel tubes are sleeved on the outermost screw. The shear-resistant steel tubes are located in the first sliding groove. Disc spring sleeves are provided on the inner side of the locking nuts. Steel pads are provided on the disc spring sleeves facing the middle of the locking screw. Several disc springs are provided between the steel pads and the disc spring sleeves.

[0007] Furthermore, several bolt holes in each column of bolt holes are interconnected to form a second sliding groove. A fixed seat is symmetrically provided on the uppermost and lowermost intermediate pressure plates. Each fixed seat is equipped with an adjusting screw. A limiting nut is provided on the end of each adjusting screw outside the fixed seat. Each locking screw arranged side-by-side is equipped with a limiting block. The limiting block is slidably sleeved on the locking screw outside the locking nut. The limiting block is equipped with a U-shaped groove. The adjusting screw is located within the U-shaped groove. Adjusting nuts are provided on the limiting screws on both sides of several limiting blocks. The adjusting nuts are used to restrict the position of the limiting block on the adjusting screw, thereby restricting the position of several locking screws within the first and second sliding grooves.

[0008] Furthermore, a steel strip is provided on the middle pressure plate on the outer sides of both ends of the friction plate. The steel strip is fixedly installed on the middle pressure plate, and the height of the steel strip is less than the height of the friction plate.

[0009] Furthermore, the sliding steel plate connector and the intermediate pressure plate connector are respectively provided with a temperature groove and a pin hole, and the temperature groove is set as a rectangular through groove.

[0010] Furthermore, an anti-loosening spring plate is provided between the locking nut and the disc spring sleeve.

[0011] Furthermore, both the sliding steel plate connector and the pressure plate connector are retractable.

[0012] Furthermore, rubber pads are provided at both ends of the temperature bath.

[0013] The beneficial effects of this invention are as follows: In this technical solution, by setting a mirror stainless steel plate on the sliding steel plate and a friction plate on the intermediate pressure plate, the movement of the beam is dissipated and buffered, ensuring the energy dissipation effect of the beam under seismic action. At the same time, the ingenious design of the high-strength bolt assembly not only adjusts the contact pressure between the mirror stainless steel plate and the friction plate, thereby changing the magnitude of the friction force during energy dissipation, but also restricts the extreme movement position of the sliding steel plate by blocking and limiting the first sliding groove through the high-strength bolt assembly, preventing the sliding steel plate from detaching from the intermediate pressure plate, and thus limiting the extreme movement position of the beam, thereby playing a role in preventing the beam from falling off.

[0014] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0015] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a three-dimensional schematic diagram of the integrated anti-falling beam device of the present invention; Figure 2 This is a schematic front view of the integrated anti-falling beam device of the present invention; Figure 3 This is a schematic cross-sectional view of the side view of the integrated anti-falling beam device of the present invention; Figure 4 for Figure 3 A magnified view of a portion of point A in the middle; Figure 5 This is a three-dimensional schematic diagram of the sliding steel plate in the integrated anti-fall beam device of the present invention; Figure 6 This is a three-dimensional schematic diagram of the pressure plate in the integrated anti-fall beam device of the present invention; Figure 7This is a three-dimensional schematic diagram of the adjusting screw and locking nut in the integrated anti-fall beam device of the present invention; Figure 8 This is a schematic cross-sectional view of the integrated anti-fall beam device of the present invention, with the axis of the adjusting screw as the section line; Figure 9 This is a schematic cross-sectional view of the integrated anti-fall beam device of the present invention, with the line connecting the midpoints of the two ends of the first chute as the cross-sectional line.

[0016] The following labels are shown in the attached diagram: 1. Sliding steel plate connector; 2. Sliding steel plate; 3. Mirror stainless steel plate; 4. Intermediate pressure plate; 5. Friction plate; 6. Pressure plate connector; 7. First connecting pin; 8. Second connecting pin; 9. Locking screw; 10. Locking nut; 11. Steel washer; 12. Disc spring; 13. Disc spring sleeve; 14. Shear-resistant steel pipe; 15. Pin hole; 16. Temperature groove; 17. Rubber pad; 18. First slide groove; 19. Second slide groove; 20. Limiting block; 21. U-shaped groove; 22. Adjusting screw; 23. Limiting nut; 24. Locking nut; 25. Fixed seat. Detailed Implementation

[0017] like Figures 1-6As shown, this invention discloses a novel intermittent energy dissipation and anti-falling beam integrated device, comprising a sliding steel plate connector 1 and a pressure plate connector 6. The sliding steel plate connector 1 and the pressure plate connector 6 are respectively connected to the bridge deck and the pier. It is easy to understand that connecting bases are provided on the bridge deck, pier, or beam body to facilitate connection with the sliding steel plate connector 1 and the pressure plate connector 6 via connecting pins or other means. A plurality of sliding steel plates 2 are provided at one end of the sliding steel plate connector 1, and these plates are vertically and evenly distributed. One end of each sliding steel plate 2 is rotatably connected to the sliding steel plate connector 1, specifically, through a first pin 7. A plurality of intermediate pressure plates 4 are provided at one end of the pressure plate connector 6, and these intermediate pressure plates 4 are vertically and evenly distributed. One end of each intermediate pressure plate 4 is rotatably connected to the pressure plate connector 6, specifically, through a second pin 8. The plurality of sliding steel plates 2 and intermediate pressure plates 4... The sliding steel plates 2 are arranged vertically at intervals (staggered arrangement), and several sliding steel plates 2 and several intermediate pressure plates 4 are in contact with each other. Specifically, the contact surfaces (which can be understood as the overlapping surfaces of the vertical projection) of several sliding steel plates 2 and intermediate pressure plates are provided with mirror stainless steel plates 3, and the contact surfaces of several intermediate pressure plates 4 and sliding steel plates 2 are provided with friction plates 5. The mirror stainless steel plates 3 and friction plates 5 are in pressure contact. Several first sliding grooves 18 are arranged side by side on several sliding steel plates 2 and mirror stainless steel plates 3. Several rows of bolt hole groups are arranged side by side on several intermediate pressure plates 4 and friction plates 5. The positions of several rows of bolt hole groups correspond to the positions of the first sliding grooves 18. High-strength bolt assemblies are provided in the bolt holes of several rows of bolt hole groups. The middle part of several high-strength bolt assemblies is located in the first sliding grooves 18. Several high-strength bolt assemblies are used to apply a compressive force to several sliding steel plates 2 and several intermediate pressure plates 4.

[0018] The working principle of the above technical solution is as follows: In this scheme, pressure is applied by high-strength bolt assemblies, and several vertically staggered sliding steel plates 2, intermediate pressure plates 4, mirror stainless steel plates 3, and friction plates 5 are in close contact to ensure that the friction force during sliding meets the energy dissipation requirements. That is, when an earthquake occurs, the movement of the beam causes the sliding steel plate connector 1 to move, which in turn causes the sliding steel plate 2 to move back and forth, which in turn causes the mirror stainless steel plate 3 to move back and forth, thus causing it to continuously rub against the friction plate 5, thereby playing a role in energy dissipation and preventing the beam from being damaged by a rigid collision with the anti-falling beam device. At the same time, it is easy to understand that when the sliding distance of the beam is too large, it will cause the first sliding groove 18 to move outward, that is, the end of the first sliding groove 18 will contact the outer high-strength bolt assembly, thereby limiting the movement of the first sliding groove 18. In turn, the high-strength bolt assembly restricts the sliding steel plate 2, thereby limiting the beam and preventing the beam from displacing too much and detaching.

[0019] The technical effects achieved by the above technical solution are as follows: By setting a mirror stainless steel plate 3 on the sliding steel plate 2 and a friction plate 5 on the intermediate pressure plate 4, the movement of the beam is dissipated and buffered, ensuring the energy dissipation effect of the beam under seismic action. At the same time, the ingenious design of the high-strength bolt assembly not only adjusts the contact pressure between the mirror stainless steel plate 3 and the friction plate 5, thereby changing the magnitude of the friction force during energy dissipation, but also restricts the extreme movement position of the sliding steel plate 2 through the blocking and limiting effect of the high-strength bolt assembly on the first sliding groove 18, preventing the sliding steel plate 2 from separating from the intermediate pressure plate 4, thereby limiting the extreme movement position of the beam and thus playing a role in preventing the beam from falling off.

[0020] In one feasible embodiment, the high-strength bolt assembly includes a locking screw 9, with locking nuts 10 at both ends of the locking screw 9. Shear-resistant steel tubes 14 are sleeved on the outermost screw, and the shear-resistant steel tubes 14 are located in the first groove 18. Disc spring sleeves 13 are provided inside the locking nuts 10. Steel pads 11 are provided on the disc spring sleeves 13 in the direction towards the middle of the locking screw 9. Several disc springs 12 are provided between the steel pads 11 and the disc spring sleeves 13.

[0021] The above structure is used to strengthen or adjust the connection strength and contact pressure between the intermediate pressure plate 4 and the sliding steel plate 2. When a major or super earthquake occurs, when the sliding steel plate connector 1 causes the sliding steel plate 2 to undergo a limit displacement in one direction, the shear-resistant steel pipe 14 will come into contact with the end of the first sliding groove 18 set on the sliding steel plate 2. At this time, the shear-resistant steel pipe 14 is sheared and thus plays a limiting role, thereby achieving the effect of preventing beam fall. The setting of the shear-resistant steel pipe 14 can improve the shear resistance of the locking bolt and ensure the limiting effect.

[0022] like Figures 7-9 As shown, in one feasible embodiment, several bolt holes in each bolt hole group are interconnected to form a second sliding groove 19. A fixing seat 25 is symmetrically provided on the uppermost and lowermost intermediate pressure plates 4. An adjusting screw 22 is provided on each fixing seat 25. A limiting nut 23 is provided on the end of each adjusting screw 22 on the outer side of the fixing seat 25 (of course, the limiting nut 23 at one end of the adjusting screw 22 can be integrated). A limiting block 20 is provided on each of the parallel locking screws 9 (e.g., ...). Figure 7 As shown, the locking screws 9 are arranged in two rows, with four screws in each row. Limiting blocks 20 are provided on two adjacent screws in the two rows. The limiting blocks 20 are slidably sleeved on the locking screws 9 outside the locking nuts 10. The limiting blocks 20 are provided with U-shaped grooves 21. Adjusting screws 22 are located in the U-shaped grooves 21. Adjusting nuts 24 are provided on the limiting screws on both sides of several limiting blocks 20. The adjusting nuts 24 are used to restrict the position of the limiting blocks 20 on the adjusting screws 22, thereby restricting the position of several locking screws 9 in the first sliding groove 18 and the second sliding groove 19.

[0023] The working principle of the above technical solution is as follows: Before installation, firstly, the overlap area between the sliding steel plate 2 and the intermediate pressure plate 4 is adjusted, that is, the overlap area of ​​the first sliding groove 18 and the second sliding groove 19 is adjusted, thereby changing the overall length of the structure formed by the sliding steel plate 2 and the intermediate pressure plate 4. This adapts to the length installation requirements of anti-fall beam devices for different bridges, or compensates for the installation error of the connecting base set on the beam by adjusting the length, so that the device can be better installed on the bridge. Then, the locking screw 9 is slid to change its relative position in the first sliding groove 18 and the second sliding groove 19, that is, to change the position between the locking screw 9 set at the edge and the end of the first sliding groove 18, thereby changing the maximum sliding distance of the sliding steel plate 2. This ensures that the maximum sliding distance of the sliding steel plate 2 is less than the disengagement displacement of the beam. After adjustment, the magnitude of the sliding friction is adjusted by tightening the locking nut 10 to meet the energy consumption requirements. Finally, the position of the adjusting nut 24 is adjusted so that it locks the position of the limiting block 20 on the adjusting screw 22.

[0024] In the above method, the movement of the adjusting screw 22 is restricted by the limiting nut 23, and then the position of the limiting block 20 is fixed on the adjusting screw 22 by the adjusting nut 24. That is, after the position of the limiting block 20 is fixed, the position of the locking screw 9 is fixed, and the locking screw 9 can play the role of blocking and limiting. Thus, the above scheme can change the overall installation length of the device and adjust the movement distance of the anti-fall beam, thereby matching the different anti-fall beam requirements of different bridges.

[0025] In one feasible embodiment, steel strips are provided on the intermediate pressure plate 4 on the outer sides of both ends of the friction plate 5. The steel strips are fixedly mounted on the intermediate pressure plate 4, and the height of the steel strips is less than the height of the friction plate 5. During sliding, the steel strips prevent relative sliding between the friction plate 5 and the intermediate pressure plate 4.

[0026] In one feasible embodiment, the sliding steel plate connector 1 and the intermediate pressure plate 4 connector are respectively provided with a temperature groove 16 and a pin hole 15, with the temperature groove 16 being a rectangular through groove. When no earthquake occurs, if temperature causes displacement at the beam end, the beam causes the connecting base to slide relative to the sliding steel plate connector 1, thus preventing the sliding steel plate connector 1 from pushing the sliding steel plate 2 to move, preventing relative displacement between the sliding steel plate 2 and the friction plate 5, which could lead to premature energy loss of the energy-consuming material. When an earthquake causes beam displacement, when the pin slides to the end of the temperature groove 16, the bottom connecting base of the beam and the sliding steel plate connector 1 no longer move relative to each other. At this time, the connector begins to push the sliding steel plate 2 to move rapidly relative to the intermediate pressure plate 4, thereby causing relative friction between the mirror stainless steel plate 3 and the friction plate 5, triggering the subsequent energy-consuming process.

[0027] In one feasible embodiment, a locking spring plate is provided between the locking nut 10 and the disc spring sleeve 13 to prevent the locking nut 10 from loosening due to vibration. The sliding steel plate connector 1 and the pressure plate connector 6 are both telescopic, such as the telescopic rod or threaded telescopic type in the prior art, which is intended to further adjust the length. Rubber pads 17 are provided at both ends of the temperature tank 16 to avoid rigid contact and impact. It is easy to understand that rubber pads 17 can also be provided at the first pin 7, the second pin 8, and the connection between the device and the beam to buffer and prevent damage from rigid contact.

[0028] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A novel intermittent energy dissipation and anti-falling beam integrated device, characterized in that: The device includes a sliding steel plate connector (1) and a pressure plate connector (6). One end of the sliding steel plate connector (1) is provided with several sliding steel plates (2), which are vertically evenly distributed. One end of each sliding steel plate (2) is rotatably connected to the sliding steel plate connector (1). One end of the pressure plate connector (6) is provided with several intermediate pressure plates (4), which are vertically evenly distributed. One end of each intermediate pressure plate (4) is rotatably connected to the pressure plate connector (6). The sliding steel plates (2) and intermediate pressure plates (4) are vertically spaced apart, and the sliding steel plates (2) and intermediate pressure plates (4) are in contact with each other. Mirrors are provided on the contact surfaces of the sliding steel plates (2) and the intermediate pressure plates. The mirror stainless steel plate (3) and the friction plate (5) are provided on the contact surfaces of the intermediate pressure plate (4) and the sliding steel plate (2). The mirror stainless steel plate (3) and the friction plate (5) are in a squeezing contact arrangement. The sliding steel plate (2) and the mirror stainless steel plate (3) are provided with a number of first sliding grooves (18) arranged side by side. The intermediate pressure plate (4) and the friction plate (5) are provided with a number of rows of bolt holes arranged side by side. The positions of the rows of bolt holes correspond to the positions of the first sliding grooves (18). The bolt holes in the rows of bolt holes are provided with high-strength bolt assemblies. The middle part of the high-strength bolt assemblies is located in the first sliding groove (18). The high-strength bolt assemblies are used to apply a squeezing force to the sliding steel plate (2) and the intermediate pressure plate (4).

2. The novel intermittent energy dissipation and anti-falling beam integrated device according to claim 1, characterized in that: The high-strength bolt assembly includes a locking screw (9), both ends of which are provided with locking nuts (10), and shear-resistant steel tubes (14) are sleeved on the outermost screw. The shear-resistant steel tubes (14) are located in the first groove (18). Disc spring sleeves (13) are provided on the inner side of the locking nuts (10). Steel pads (11) are provided on the disc spring sleeves (13) in the direction of the middle of the locking screw (9). Several disc springs (12) are provided between the steel pads (11) and the disc spring sleeves (13).

3. The novel intermittent energy dissipation and anti-falling beam integrated device according to claim 2, characterized in that: Several bolt holes in each column of bolt holes are interconnected to form a second sliding groove (19). A fixed seat (25) is symmetrically provided on the uppermost and lowermost intermediate pressure plates (4). An adjusting screw (22) is provided on each fixed seat (25). A limiting nut (23) is provided on the end of the adjusting screw (22) outside the fixed seat (25). A limiting block (20) is provided on each of the parallel locking screws (9). The limiting block (20) is slidably sleeved on the locking nut (…). 10) On the outer locking screw (9), the limiting block (20) is provided with a U-shaped groove (21), the adjusting screw (22) is located in the U-shaped groove (21), and the limiting screws on both sides of the limiting blocks (20) are provided with adjusting nuts (24). The adjusting nuts (24) are used to restrict the position of the limiting block (20) on the adjusting screw (22), thereby restricting the position of the locking screws (9) in the first slide groove (18) and the second slide groove (19).

4. The novel intermittent energy dissipation and anti-falling beam integrated device according to claim 1, characterized in that: Steel strips are provided on the middle pressure plate (4) on both sides of the friction plate (5). The steel strips are fixedly installed on the middle pressure plate (4), and the height of the steel strips is less than the height of the friction plate (5).

5. A novel intermittent energy dissipation and anti-falling beam integrated device according to claim 1, characterized in that: The sliding steel plate connector (1) and the intermediate pressure plate (4) connector are respectively provided with a temperature groove (16) and a pin hole (15), and the temperature groove (16) is set as a rectangular through groove.

6. A novel intermittent energy dissipation and anti-falling beam integrated device according to claim 2, characterized in that: A locking spring plate is provided between the locking nut (10) and the disc spring sleeve (13).

7. A novel intermittent energy dissipation and anti-falling beam integrated device according to claim 1, characterized in that: Both the sliding steel plate connector (1) and the pressure plate connector (6) are retractable.

8. A novel intermittent energy dissipation and anti-falling beam integrated device according to claim 5, characterized in that: Rubber pads (17) are provided at both ends of the temperature tank (16).

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