Buffered anti-falling beam bridge support

Abstract

The application provides a buffer anti-falling beam bridge support, which comprises a base plate, an intermediate connecting seat plate, a horizontal shear buffering mechanism and an upper seat plate, the intermediate connecting seat plate is horizontally slidably installed on the base plate, the horizontal shear buffering mechanism is circumferentially arranged along the base plate and abuts against the intermediate connecting seat plate, the upper seat plate is slidably installed on the intermediate connecting seat plate along the longitudinal bridge direction and the transverse bridge direction and is rotatably installed around the central axis of the intermediate connecting seat plate, the upper seat plate is extruded by the intermediate connecting seat plate to press the horizontal shear buffering mechanism when the upper seat plate moves more than a first preset distance range along the longitudinal bridge direction or more than a second preset distance range along the transverse bridge direction under the action of a beam body, and the horizontal shear buffering mechanism generates horizontal shear resistance to buffer the movement of the beam body. The buffer anti-falling beam bridge support can be coordinated in the longitudinal bridge direction and the transverse bridge direction as a whole to buffer the seismic force, effectively reduces the vibration in each direction and has a better anti-falling beam effect.

Description

Technical Field

[0001] This invention relates to the field of bridge bearings, and more specifically, to a bridge bearing for preventing beam fall. Background Technology

[0002] my country is a country prone to earthquakes. After an earthquake, bridges are often damaged, leading to traffic disruptions and severely hindering disaster relief efforts. Especially after a strong earthquake, bridges still need to maintain basic traffic flow, which necessitates the installation of anti-falling beam devices on bridges or their supports.

[0003] Currently, the design and construction of anti-beam-falling devices in actual engineering projects are quite complicated, mainly due to the following problems:

[0004] 1) Existing anti-fall beam devices generally use blocks to prevent lateral beam fall and cables to prevent longitudinal beam fall. Each beam-falling device works independently, lacking overall coordination. The seismic energy dissipation direction is singular, and the anti-fall beam effect is not obvious.

[0005] 2) Most of the existing anti-fall beam devices are "hard resistance" type. After an earthquake, problems such as uneven stress on the shear pins may occur. In some cases, the shear pins cannot be removed or replaced after the support structure is damaged, and the support cannot be reset on its own. Ultimately, it is necessary to close the road and lift the entire beam to replace the support, which is costly and poses a great safety hazard to construction and operation.

[0006] 3) Existing anti-falling beam devices require separate installation space, while the reserved installation space for anti-falling beam devices is very small, resulting in unreasonable installation and affecting the safety of the bridge;

[0007] 4) Various anti-fall beam devices need to be installed separately and used in conjunction with supports, which is costly. Summary of the Invention

[0008] The main objective of this invention is to provide a buffer anti-fall beam bridge support, which at least solves the problems of existing anti-fall beam devices, which generally use blocks to prevent lateral beam fall and cables to prevent longitudinal beam fall. These devices operate independently, lack overall coordination, have a single direction of seismic energy dissipation, and are not effective in preventing beam fall.

[0009] To achieve the above objectives, the present invention provides a buffer anti-falling beam bridge support, comprising: a base plate for fixed connection to the upper surface of the bridge pier; an intermediate connecting plate, the lower surface of which is horizontally slidably mounted on the upper surface of the base plate; a horizontal shearing buffer mechanism, arranged circumferentially around the base plate and abutting against the intermediate connecting plate along the circumferential direction of the intermediate connecting plate; an upper plate, the upper surface of which is fixedly connected to the lower surface of the beam, the upper plate being slidable along the longitudinal and transverse directions of the bridge and rotatably mounted on the intermediate connecting plate about the central axis of the intermediate connecting plate; and two longitudinal limiting blocks corresponding to the two sides of the intermediate connecting plate along the longitudinal direction of the bridge and a horizontal shearing buffer mechanism. The intermediate connecting plate has two lateral limiting blocks on both sides along the transverse direction of the bridge, two longitudinal limiting blocks to limit the upper plate to slide within a first preset distance along the longitudinal direction of the bridge, and two lateral limiting blocks to limit the upper plate to slide within a second preset distance along the transverse direction of the bridge and to limit the upper plate to rotate within a preset angle range; the first preset distance range is greater than the second preset distance range; wherein, when the upper plate moves beyond the first preset distance range along the longitudinal direction of the bridge or beyond the second preset distance range along the transverse direction of the bridge under the action of the beam, the intermediate connecting plate squeezes the horizontal shear buffer mechanism in the horizontal direction; the horizontal shear buffer mechanism is used to generate horizontal shear resistance to buffer the movement of the beam through the intermediate connecting plate and the upper plate.

[0010] Furthermore, the lower end of the intermediate connecting seat plate has a cylindrical structure, and the horizontal shearing buffer mechanism includes: a rigid buffer mechanism, which is a ring structure and is arranged around the circumference of the base plate, with the inner ring surface of the rigid buffer mechanism abutting against the lower side wall of the intermediate connecting seat plate; and a flexible buffer mechanism, which is a ring structure and is arranged around the circumference of the base plate, with the outer ring surface of the flexible buffer mechanism abutting against the inner ring surface of the rigid buffer mechanism, and the inner ring surface of the flexible buffer mechanism abutting against the lower side wall of the intermediate connecting seat plate.

[0011] Furthermore, the rigid buffer mechanism includes: an outer basin ring and an inner basin ring, both of which are annular boss structures extending circumferentially along the upper surface of the base plate, with the outer peripheral wall of the inner basin ring abutting against the inner peripheral wall of the outer basin ring; a plurality of first pin holes are evenly spaced along the circumferential direction of the contact surface of the outer and inner basin rings, extending along the height direction of the outer and inner basin rings; a shear ring, with its outer end located above the outer and inner basin rings and abutting against the upper surfaces of the outer and inner basin rings, and its inner end abutting against the lower side wall of the intermediate connecting base plate; a plurality of second pin holes are evenly spaced along the circumferential direction of the outer end of the shear ring, the plurality of second pin holes penetrating along the thickness direction of the shear ring and corresponding one-to-one with the plurality of first pin holes; and multiple shear pins, each corresponding to one of the multiple second pin holes and multiple first pin holes, to connect the shear ring to the outer and inner basin rings.

[0012] Furthermore, the outer basin ring is integrally formed with the base plate, and the inner basin ring is composed of multiple equally divided inner basin arc segments; the multiple inner basin arc segments are detachably set on the upper surface of the base plate and fixedly connected to the outer basin ring by connecting bolts.

[0013] Furthermore, the flexible buffer mechanism is an annular damping block, and both the upper and lower surfaces of the annular damping block are concave annular arc surface structures.

[0014] Furthermore, the upper surface of the base plate is provided with a first stainless steel plate, and the lower surface of the intermediate connecting plate is provided with a first flat sliding plate; wherein, the intermediate connecting plate is horizontally slidably mounted on the first stainless steel plate via the first flat sliding plate.

[0015] Furthermore, the upper surface of the intermediate connecting seat plate is a concave spherical structure, and a spherical sliding plate matching the shape of the upper surface is provided on the upper surface of the intermediate connecting seat plate; the buffer anti-fall beam bridge support also includes: a spherical crown liner, the lower surface of the spherical crown liner is a convex spherical structure and is rotatably mounted on the spherical sliding plate around its axis.

[0016] Furthermore, the upper surface of the spherical crown liner is a planar structure and is provided with a second planar sliding plate, and the lower surface of the upper seat plate is provided with a second stainless steel plate. The upper seat plate is slidably mounted on the second planar sliding plate via the second stainless steel plate.

[0017] Furthermore, the upper surface of the intermediate connecting seat plate is provided with a first annular sealing ring surrounding the spherical sliding plate, the upper surface of the first annular sealing ring abutting against the lower surface of the spherical crown liner to seal the spherical sliding plate; the upper surface of the spherical crown liner is provided with a second annular sealing ring surrounding the second planar sliding plate, the upper surface of the second annular sealing ring abutting against the lower surface of the second stainless steel plate to seal the second planar sliding plate.

[0018] Furthermore, the upper end of the intermediate connecting seat plate has a rectangular limiting plate, and side sliding plates are respectively provided on the two opposite side walls of the rectangular limiting plate along the transverse bridge direction; side stainless steel plates are respectively provided on the inner side walls of the two opposite transverse limiting blocks; wherein, there is a preset gap between the two side sliding plates and the two side stainless steel plates to limit the upper seat plate to slide within a second preset distance along the transverse bridge direction.

[0019] The present invention provides a buffer anti-falling beam bridge support, comprising a base plate, an intermediate connecting plate, a horizontal shearing buffer mechanism, and an upper plate. The base plate is fixedly connected to the upper surface of the pier. The lower surface of the intermediate connecting plate is horizontally slidably mounted on the upper surface of the base plate. The horizontal shearing buffer mechanism is arranged around the circumference of the base plate and abuts against the intermediate connecting plate along the circumference of the intermediate connecting plate. The upper surface of the upper plate is fixedly connected to the lower surface of the beam. The upper plate is slidable along the longitudinal and transverse directions of the bridge and rotatably mounted on the intermediate connecting plate about its central axis. The lower surface of the upper plate is provided with two longitudinal limiting blocks corresponding to the two sides of the intermediate connecting plate along the longitudinal direction of the bridge. Two lateral limiting blocks corresponding to both sides of the intermediate connecting seat plate along the transverse direction of the bridge, and two longitudinal limiting blocks are used to limit the upper seat plate to slide within a first preset distance range along the longitudinal direction of the bridge, and two lateral limiting blocks are used to limit the upper seat plate to slide within a second preset distance range along the transverse direction of the bridge and to limit the upper seat plate to rotate within a preset angle range; the first preset distance range is greater than the second preset distance range; when the upper seat plate moves beyond the first preset distance range along the longitudinal direction of the bridge or beyond the second preset distance range along the transverse direction under the action of the beam, the intermediate connecting seat plate compresses the horizontal shear buffer mechanism in the horizontal direction; the horizontal shear buffer mechanism generates horizontal shear resistance to buffer the movement of the beam through the intermediate connecting seat plate and the upper seat plate. The buffer anti-fall beam bridge support of this scheme can buffer seismic forces in a coordinated manner in the longitudinal and transverse directions of the bridge, achieve effective vibration reduction in all directions, and have a better anti-fall beam effect. It solves the problems of existing anti-fall beam devices, which generally use blocks to prevent transverse beam fall and cables to prevent longitudinal beam fall, with each anti-fall beam device working independently, lacking overall coordination, having a single direction of seismic energy dissipation, and having an insignificant anti-fall beam effect. Attached Figure Description

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

[0021] Figure 1 This is a schematic diagram of the cross-sectional and side structure of the first type of buffer anti-fall beam bridge support, which is optional according to an embodiment of the present invention, along the transverse direction.

[0022] Figure 2 This is a schematic diagram of the cross-sectional and side structure of the first type of buffer anti-fall beam bridge support, which is optional according to an embodiment of the present invention, along the longitudinal direction of the bridge.

[0023] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0024] Figure 4This is a schematic diagram of the first type of flexible buffer mechanism structure for a bridge support for preventing beams from falling off, which is an optional feature of this invention.

[0025] Figure 5 This is a schematic diagram of the first type of flexible buffer mechanism structure for a bridge support for preventing beams from falling off, which is an optional feature of this invention.

[0026] Figure 6 This is a schematic diagram of the cross-sectional and side structure of a second type of buffer anti-fall beam bridge support, which is optional according to an embodiment of the present invention, along the transverse direction.

[0027] Figure 7 This is a schematic diagram of the cross-section and side structure of a second type of buffer anti-fall beam bridge support, which is optional according to an embodiment of the present invention, along the longitudinal direction.

[0028] The above figures include the following reference numerals:

[0029] 10. Base plate; 11. First stainless steel plate; 20. Intermediate connecting plate; 21. First flat sliding plate; 22. Spherical sliding plate; 23. First annular sealing ring; 24. Rectangular limiting plate; 25. Side sliding plate; 30. Horizontal shearing buffer mechanism; 31. Rigid buffer mechanism; 311. Outer basin ring; 312. Inner basin ring; 313. Shear ring; 314. Shear pin; 315. Connecting bolt; 32. Flexible buffer mechanism; 321. Arc-shaped damping section; 40. Upper plate; 41. Longitudinal limiting block; 42. Lateral limiting block; 43. Second stainless steel plate; 44. Side stainless steel plate; 50. Spherical crown liner; 51. Second flat sliding plate; 52. Second annular sealing ring. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] The buffer anti-fall beam bridge support of the present invention, such as Figure 1 and Figure 2As shown, the structure includes a base plate 10, an intermediate connecting plate 20, a horizontal shear buffer mechanism 30, and an upper plate 40. The base plate 10 is fixedly connected to the upper surface of the pier. The lower surface of the intermediate connecting plate 20 is horizontally slidably mounted on the upper surface of the base plate 10. The horizontal shear buffer mechanism 30 is arranged around the circumference of the base plate 10 and abuts against the intermediate connecting plate 20 along the circumference of the intermediate connecting plate 20. The upper surface of the upper plate 40 is fixedly connected to the lower surface of the beam. The upper plate 40 is slidable along the longitudinal and transverse directions and rotatably mounted on the intermediate connecting plate 20 about the central axis of the intermediate connecting plate 20. The lower surface of the upper plate 40 is provided with two longitudinal limiting blocks 41 corresponding to the two sides of the intermediate connecting plate 20 along the longitudinal direction and two transverse limiting blocks 42 corresponding to the two sides of the intermediate connecting plate 20 along the transverse direction. 2. Two longitudinal limiting blocks 41 are used to limit the upper seat plate 40 to slide within a first preset distance range along the longitudinal direction of the bridge, and two transverse limiting blocks 42 are used to limit the upper seat plate 40 to slide within a second preset distance range along the transverse direction of the bridge and to limit the upper seat plate 40 to rotate within a preset angle range; the first preset distance range is greater than the second preset distance range; when the upper seat plate 40 moves beyond the first preset distance range along the longitudinal direction of the bridge under the action of the beam, it pushes the intermediate connecting seat plate 20 in the horizontal direction through the longitudinal limiting blocks 41, and when it moves beyond the second preset distance range along the transverse direction of the bridge, it pushes the intermediate connecting seat plate 20 in the horizontal direction through the transverse limiting blocks 42, and the intermediate connecting seat plate 20 compresses the horizontal shear buffer mechanism 30 in the horizontal direction; the horizontal shear buffer mechanism 30 generates horizontal shear resistance to buffer the movement of the beam through the intermediate connecting seat plate 20 and the upper seat plate 40. This proposed buffer bridge support system effectively buffers seismic forces in both the longitudinal and transverse directions. Its transverse sliding range is relatively small, primarily serving as a sliding limiter, allowing the bridge beam to slide freely in the longitudinal direction without significant transverse displacement. This achieves effective vibration reduction in all directions and provides a superior anti-falling beam effect. It addresses the problems of existing anti-falling beam devices, which typically use blocks to prevent transverse falls and cables to prevent longitudinal falls. These devices operate independently, lacking overall coordination, resulting in unidirectional seismic energy dissipation and ineffective anti-falling beam measures.

[0032] In specific implementation, the base plate 10 has a square plate structure, and a first stainless steel plate 11 is provided on the upper surface of the base plate 10. The first stainless steel plate 11 is welded to the upper surface of the base plate 10. The lower end of the intermediate connecting plate 20 has a cylindrical structure, and a first flat sliding plate 21 is provided on the lower surface of the intermediate connecting plate 20. The upper half of the first flat sliding plate 21 is embedded in the lower surface of the intermediate connecting plate 20. The intermediate connecting plate 20 can be horizontally slidably mounted on the first stainless steel plate 11 through the first flat sliding plate 21, so that the intermediate connecting plate 20 can slide freely in the horizontal direction relative to the base plate 10 to compress the horizontal shearing buffer mechanism 30 from different directions.

[0033] Furthermore, the upper surface of the intermediate connecting seat plate 20 is a concave spherical structure, and a spherical sliding plate 22 matching the shape of its upper surface is provided on the upper surface of the intermediate connecting seat plate 20. The lower half of the spherical sliding plate 22 is integrally embedded in the upper surface of the intermediate connecting seat plate 20. The buffer anti-fall beam bridge support also includes a spherical crown liner 50. The lower surface of the spherical crown liner 50 is a convex spherical structure and matches the upper surface of the spherical sliding plate 22. The spherical crown liner 50 is rotatably mounted on the spherical sliding plate 22 around its axis. The upper surface of the spherical crown liner 50 is a planar structure and is provided with a second planar sliding plate 51. The lower half of the second planar sliding plate 51 is integrally embedded in the upper surface of the spherical crown liner 50. A second stainless steel plate 43 is provided on the lower surface of the upper seat plate 40. The second stainless steel plate 43 is welded to the lower surface of the upper seat plate 40. The upper seat plate 40 is slidably mounted on the second planar sliding plate 51 via the second stainless steel plate 43. The upper end of the intermediate connecting seat plate 20 has a rectangular limiting plate 24. The rectangular limiting plate 24 is provided with side sliding plates 25 on two opposite side walls along the transverse direction of the bridge. The inner side walls of the two transverse limiting blocks 42 are respectively welded with side stainless steel plates 44. There is a preset gap between the two side sliding plates 25 and the two side stainless steel plates 44 to limit the upper seat plate 40 to slide within a second preset distance along the transverse direction of the bridge, and at the same time play a sliding limiting role in the movement of the beam along the longitudinal direction of the bridge.

[0034] The upper seat plate 40 achieves horizontal sliding along the longitudinal and transverse directions of the bridge through the second stainless steel plate 43 and the second planar sliding plate 51, thereby offsetting the horizontal seismic action; the upper seat plate 40 can achieve rotation around the central axis through the action of the spherical crown liner 50 and the spherical sliding plate 22, thereby offsetting the rotational action of the beam caused by the earthquake; due to the limiting effect of the two transverse limiting blocks 42, the rotation angle is also within a certain range.

[0035] Furthermore, the upper surface of the intermediate connecting plate 20 is provided with a first annular sealing ring 23 surrounding the spherical sliding plate 22. The lower half of the first annular sealing ring 23 is embedded in the upper surface of the intermediate connecting plate 20, and the upper surface of the first annular sealing ring 23 abuts against the lower surface of the spherical crown liner 50 to seal the spherical sliding plate 22. The upper surface of the spherical crown liner 50 is provided with a second annular sealing ring 52 surrounding the second planar sliding plate 51. The lower half of the second annular sealing ring 52 is embedded in the upper surface of the spherical crown liner 50, and the upper surface of the second annular sealing ring 52 abuts against the lower surface of the second stainless steel plate 43 to seal the second planar sliding plate 51. By providing the first annular sealing ring 23 and the second annular sealing ring 52, the horizontal sliding mechanism and the rotary sliding mechanism between the upper plate 40 and the intermediate connecting plate 20 can be sealed, preventing dust or impurities from entering and affecting the sliding of the horizontal sliding mechanism and the rotary sliding mechanism.

[0036] The horizontal shear buffer mechanism 30 includes a rigid buffer mechanism 31 and a flexible buffer mechanism 32. The rigid buffer mechanism 31 is a circular structure and is arranged around the circumference of the base plate 10. The inner ring surface of the rigid buffer mechanism 31 abuts against the lower side wall of the intermediate connecting base plate 20. The flexible buffer mechanism 32 is also a circular structure and is arranged around the circumference of the base plate 10. The outer ring surface of the flexible buffer mechanism 32 abuts against the inner ring surface of the rigid buffer mechanism 31, and the inner ring surface of the flexible buffer mechanism 32 abuts against the lower side wall of the intermediate connecting base plate 20. When the beam slides along the longitudinal or transverse direction under seismic action, if the longitudinal sliding exceeds the first preset distance range or the transverse sliding exceeds the second preset distance range, the intermediate connecting plate 20 first exerts a compressive force on the rigid buffer mechanism 31. When the compressive force exceeds the ultimate bearing capacity of the rigid buffer mechanism 31, the rigid buffer mechanism 31 breaks down to achieve primary buffering. Subsequently, the intermediate connecting plate 20 continues to exert a compressive force on the flexible buffer mechanism 32 in the horizontal direction, and the flexible buffer mechanism 32 undergoes elastic deformation to achieve secondary buffering.

[0037] Specifically, such as Figures 1 to 3 As shown, the rigid buffer mechanism 31 includes an outer basin ring 311, an inner basin ring 312, a shear ring 313, and a shear pin 314. Both the outer basin ring 311 and the inner basin ring 312 are annular boss structures extending circumferentially along the upper surface of the base plate 10, and their upper surfaces are flush. Specifically, the outer basin ring 311 is integrally formed with the base plate 10, as shown... Figure 3 As shown, the inner basin ring 312 is composed of multiple equally divided inner basin arc segments. These multiple inner basin arc segments are detachably mounted on the upper surface of the base plate 10. A certain gap is left between the multiple equally divided inner basin arc segments, making the inner basin ring 312 easier to assemble and disassemble. The outer peripheral wall of the inner basin ring 312 abuts against the inner peripheral wall of the outer basin ring 311. Bolt holes are provided along the radial direction of the outer basin ring 311 and the inner basin ring 312. There are multiple bolt holes, which are evenly spaced along the circumference of the outer basin ring 311 and the inner basin ring 312. The inner basin ring 312 is fixedly connected to the outer basin ring 311 by multiple connecting bolts 315 that are correspondingly inserted into the multiple bolt holes.

[0038] Multiple first pin holes are evenly spaced along the circumferential direction of the contact surface between the outer basin ring 311 and the inner basin ring 312, extending along the height direction of the outer basin ring 311 and the inner basin ring 312. Specifically, each pin hole is formed by the mating of semi-circular grooves radially oppositely formed on the inner sidewall of the outer basin ring 311 and the outer sidewall of the inner basin ring 312; the center of the first pin hole vertically passes through the boundary line between the outer basin ring 311 and the inner basin ring 312, with each half of the pin hole located at the boundary of the outer basin ring 311 and the inner basin ring 312. The outer basin ring 311 and the inner basin ring 312 are connected into a whole by shear pins 314, and the outer end of the shear ring 313 is located above the outer basin ring 311 and the inner basin ring 312 and is connected to the outer basin ring 311 and the inner basin ring 312. The upper surfaces of 12 abut against each other, and the inner end of the shear ring 313 abuts against the lower side wall of the intermediate connecting seat plate 20. A plurality of second pin holes are evenly spaced along the circumference of the outer end of the shear ring 313. The plurality of second pin holes penetrate along the thickness direction of the shear ring 313 and correspond one-to-one with the plurality of first pin holes. There are a plurality of shear pins 314. The plurality of shear pins 314 pass through the plurality of second pin holes and the plurality of first pin holes respectively to connect the shear ring 313 with the outer basin ring 311 and the inner basin ring 312. When the beam slides along the longitudinal or transverse direction under seismic loading, the intermediate connecting plate 20 exerts a horizontal compressive force on the shear ring 313. The shear ring 313 transmits the force to the outer basin ring 311 and the inner basin ring 312 through multiple shear pins 314. When the compressive force exceeds the ultimate bearing capacity of the multiple shear pins 314, the shear ring 313 shears the multiple shear pins 314 along the contact surface between the shear ring 313 and the outer basin ring 311 and the inner basin ring 312, thereby achieving primary buffering.

[0039] Furthermore, such as Figures 3 to 5 As shown, the flexible buffer mechanism 32 is an annular damping block, which is composed of multiple equally divided arc-shaped damping segments 321, thus facilitating the assembly and disassembly of the flexible buffer mechanism 32; as Figure 4 and Figure 5As shown, there are an even number of annular damping blocks. In this embodiment, there are four or six annular damping blocks. The upper and lower surfaces of the annular damping blocks are concave annular arc surfaces. During compression elastic deformation, they can deform along the vertical space without bulging up or down. The deformation is uniform, reliable, and durable. Optionally, the outer basin ring 311 has a rectangular cross-section, and the inner basin ring 312 has an "L" shaped cross-section so that the inner circumferential wall of the inner basin ring 312 forms an annular limiting groove. The outer end of the annular damping block is located in the limiting groove and abuts against the side wall of the limiting groove, thereby limiting the annular damping block and preventing it from sliding up and down. The inner side wall of the annular damping block abuts against the lower side wall of the intermediate connecting seat plate 20. The upper end of the annular damping block abuts against the lower surface of the shear ring 313. When each shear pin 314 breaks, the remaining force of the intermediate connecting seat plate 20 continues to compress the annular damping block, thereby achieving secondary buffering. After the earthquake ends, under the rebound force of the annular damping block, the beam can be quickly reset through the intermediate connecting seat plate 20 and the upper seat plate 40; at the same time, the shear ring 313 can also be quickly reset.

[0040] In the specific installation of the buffer anti-fall beam bridge support of this embodiment of the invention, firstly, the intermediate connecting seat plate 20 and its auxiliary components are installed on the base plate 10, then multiple inner basin arc segments of the inner basin ring 312 and each arc damping segment 321 of the flexible buffer mechanism 32 are embedded, the shear ring 313 is installed and the outer basin ring 311 and the inner basin ring 312 are connected into a whole by the shear pin 314, then the spherical crown liner 50 and its auxiliary components are installed, and finally the upper seat plate 40 and its auxiliary components are installed to complete the installation.

[0041] The buffer anti-falling beam bridge support of this embodiment of the invention is assembled as a whole, capable of bearing the load of the bridge and superstructure vertically. The support can slide horizontally via a friction pair formed by the first stainless steel plate 11 and the first planar sliding plate 21 to accommodate the sliding displacement of the bridge beam; and it can accommodate the rotational displacement of the bridge via a rotational friction pair formed by the spherical crown liner 50 and the spherical sliding plate 22. Laterally, the bridge's lateral displacement is restricted by two lateral limiting blocks 42 on the upper support plate 40, and guided by the friction formed by the side stainless steel plate 44 and the side sliding plate 25.

[0042] like Figure 6 and Figure 7 As shown, for scenarios where some bridges do not require buffering, this invention discloses another type of buffer anti-falling beam bridge support. Figure 6 It is a transverse bridge structure. Figure 7 As the bridge structure is longitudinal, the bridge support in this embodiment does not need to be equipped with the flexible buffer mechanism 32 to save construction costs. Since the flexible buffer mechanism 32 is removed, the overall cross-section of the inner basin ring 312 is a rectangular structure, and its inner peripheral wall does not have an annular limiting groove. The remaining structural composition is the same as the buffer anti-falling beam bridge support in the above embodiment.

[0043] When an earthquake occurs and the longitudinal displacement of the bridge exceeds the normal displacement, the two longitudinal limiting blocks 41 of the upper seat plate 40 contact the rectangular limiting plate 24 at the upper end of the intermediate connecting seat plate 20 along the two sides of the longitudinal direction, transmitting force to the intermediate connecting seat plate 20. The force is then transmitted from the bottom of the intermediate connecting seat plate 20 to the shear ring 313. When the seismic force exceeds the set shear force of the shear pin 314, the shear pin 314 shears radially at the contact surfaces between the outer basin ring 311 and the inner basin ring 312 and the shear ring 313. At this time, the intermediate connecting seat plate 20 begins to compress the annular damping block, further dissipating the seismic energy.

[0044] After the earthquake, the compressed annular damping block gradually rebounds, driving the beam to automatically reset via the intermediate connecting plate 20 and the upper plate 40. At this point, there is no need to lift the beam or disassemble the supports. Simply lift and stabilize the shear ring 313, loosen the connecting bolts 315 around the radial circle, remove the various arc-shaped damping segments 321 of the annular damping block, then remove the multiple inner arc-shaped segments of the outer basin ring 311, remove the broken remaining shear pins 314, reconnect and fix the inner basin ring 312 and the outer basin ring 311 with the connecting bolts 315, install the annular damping block, lower the shear ring 313, and hammer in the new shear pins 314 vertically. After replacing the shear pins 314, the beam can be put back into service.

[0045] This invention primarily solves the problems of bearings failing to self-reset after an earthquake, damping materials being easily damaged, having a short lifespan, inconvenient construction, and high maintenance costs. It allows for rapid replacement after the shear pin breaks, and has the following main advantages:

[0046] 1. After an earthquake, the beams do not need to be pushed back up and can automatically reset;

[0047] 2. It can adapt to earthquakes from any direction. The shear ring 313 is a ring structure and shear pins 314 are arranged in the ring. No matter which direction the earthquake comes from, the shear pins 314 can be uniformly stressed in the ring, achieving 360-degree circumferential seismic resistance.

[0048] 3. After an earthquake, the shear pin 314 can be quickly replaced without lifting the beam.

[0049] 4. The damping unit, made of polymer material, has a buffering function, effectively dissipates seismic energy, has excellent durability and mechanical properties, a long service life, and is quick and convenient to replace and maintain later.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A buffer bridge support for preventing beam collapse, characterized in that, include: A base plate (10) is used to be fixedly connected to the upper surface of the pier; An intermediate connecting plate (20) is provided, the lower surface of which is horizontally slidably mounted on the upper surface of the base plate (10). A horizontal shearing buffer mechanism (30) is arranged around the base plate (10) in the circumferential direction and abuts against the intermediate connecting plate (20) in the circumferential direction of the intermediate connecting plate (20). The upper seat plate (40) has its upper surface fixedly connected to the lower surface of the beam. The upper seat plate (40) is slidable along the longitudinal and transverse directions and rotatably mounted on the intermediate connecting seat plate (20) around the central axis. The lower surface of the upper seat plate (40) is provided with two longitudinal limiting blocks (41) corresponding to the two sides of the intermediate connecting seat plate (20) along the longitudinal direction and two transverse limiting blocks (42) corresponding to the two sides of the intermediate connecting seat plate (20) along the transverse direction. The two longitudinal limiting blocks (41) are used to limit the upper seat plate (40) from sliding within a first preset distance range along the longitudinal direction, and the two transverse limiting blocks (42) are used to limit the upper seat plate (40) from sliding within a second preset distance range along the transverse direction and to limit the upper seat plate (40) from rotating within a preset angle range. The first preset distance range is greater than the second preset distance range. When the upper seat plate (40) moves beyond the first preset distance range along the longitudinal direction of the bridge or beyond the second preset distance range along the transverse direction of the bridge under the action of the beam, it squeezes the horizontal shear buffer mechanism (30) in the horizontal direction through the intermediate connecting seat plate (20); the horizontal shear buffer mechanism (30) is used to generate horizontal shear resistance to buffer the movement of the beam through the intermediate connecting seat plate (20) and the upper seat plate (40); The lower end of the intermediate connecting seat plate (20) is cylindrical. The horizontal shearing buffer mechanism (30) includes a rigid buffer mechanism (31) and a flexible buffer mechanism (32). The rigid buffer mechanism (31) is an annular structure and is arranged around the circumference of the base plate (10). The inner ring surface of the rigid buffer mechanism (31) abuts against the lower end sidewall of the intermediate connecting seat plate (20). The flexible buffer mechanism (32) is an annular structure and is arranged around the circumference of the base plate (10). The outer ring surface of the flexible buffer mechanism (32) abuts against the inner ring surface of the rigid buffer mechanism (31). The inner ring surface of the flexible buffer mechanism (32) abuts against the lower end sidewall of the intermediate connecting seat plate (20). The rigid buffer mechanism (31) includes an outer basin ring (311), an inner basin ring (312), a shear ring (313), and a shear pin (314). The outer basin ring (311) and the inner basin ring (312) are both annular boss structures extending circumferentially along the upper surface of the base plate (10). The outer peripheral wall of the inner basin ring (312) abuts against the inner peripheral wall of the outer basin ring (311). A plurality of first pin holes are evenly spaced along the circumferential direction of the contact surface between the outer basin ring (311) and the inner basin ring (312). The first pin holes extend along the height direction of the outer basin ring (311) and the inner basin ring (312). The outer end of the shear ring (313) is located between the outer basin ring (311) and the inner basin ring (312). The inner basin ring (312) is positioned above and abuts against the upper surfaces of the outer basin ring (311) and the inner basin ring (312). The inner end of the shear ring (313) abuts against the lower side wall of the intermediate connecting seat plate (20). A plurality of second pin holes are evenly spaced along the circumference of the outer end of the shear ring (313). The plurality of second pin holes penetrate along the thickness direction of the shear ring (313) and correspond one-to-one with the plurality of first pin holes. There are a plurality of shear pins (314). The plurality of shear pins (314) pass through the plurality of second pin holes and the plurality of first pin holes respectively to connect the shear ring (313) with the outer basin ring (311) and the inner basin ring (312). The outer basin ring (311) is integrally formed with the base plate (10), and the inner basin ring (312) is composed of multiple equally divided inner basin arc segments; the multiple inner basin arc segments are detachably set on the upper surface of the base plate (10) and fixedly connected to the outer basin ring (311) by connecting bolts (315).

2. The buffer anti-fall beam bridge support according to claim 1, characterized in that, The flexible buffer mechanism (32) is an annular damping block, and the upper and lower surfaces of the annular damping block are both concave annular arc surface structures.

3. The buffer anti-fall beam bridge support according to claim 1, characterized in that, The upper surface of the base plate (10) is provided with a first stainless steel plate (11), and the lower surface of the intermediate connecting base plate (20) is provided with a first flat sliding plate (21). The intermediate connecting plate (20) is horizontally slidably mounted on the first stainless steel plate (11) via the first flat sliding plate (21).

4. The buffer anti-fall beam bridge support according to claim 1, characterized in that, The upper surface of the intermediate connecting seat plate (20) is a concave spherical structure, and the upper surface of the intermediate connecting seat plate (20) is provided with a spherical sliding plate (22) that matches the shape of its upper surface; the buffer anti-fall beam bridge support also includes: A spherical crown liner (50) has a convex spherical structure on its lower surface and is rotatably mounted on the spherical slide plate (22) about its axis.

5. The buffer anti-fall beam bridge support according to claim 4, characterized in that, The upper surface of the spherical crown liner (50) is a planar structure and is provided with a second planar sliding plate (51). The lower surface of the upper seat plate (40) is provided with a second stainless steel plate (43). The upper seat plate (40) is slidably mounted on the second planar sliding plate (51) via the second stainless steel plate (43).

6. The buffer anti-fall beam bridge support according to claim 5, characterized in that, The upper surface of the intermediate connecting plate (20) is provided with a first annular sealing ring (23) surrounding the spherical sliding plate (22), and the upper surface of the first annular sealing ring (23) abuts against the lower surface of the spherical crown liner (50) to seal the spherical sliding plate (22); the upper surface of the spherical crown liner (50) is provided with a second annular sealing ring (52) surrounding the second planar sliding plate (51), and the upper surface of the second annular sealing ring (52) abuts against the lower surface of the second stainless steel plate (43) to seal the second planar sliding plate (51).

7. The buffer anti-fall beam bridge support according to claim 1, characterized in that, The upper end of the intermediate connecting seat plate (20) has a rectangular limiting plate (24), and the rectangular limiting plate (24) has side sliding plates (25) respectively on two opposite side walls along the transverse bridge direction; the two transverse limiting blocks (42) have side stainless steel plates (44) respectively on their opposite inner side walls. There is a preset gap between the two side sliding plates (25) and the two side stainless steel plates (44) to limit the upper seat plate (40) to slide within a second preset distance along the transverse bridge direction.

Images