Beam falling prevention device

Abstract

The invention discloses a beam falling prevention device, which belongs to the technical field of bridge supports, and comprises an upper anchoring assembly, a lower anchoring assembly, a rectangular damping element and a limiting assembly, and the upper anchoring assembly is used for connecting a beam body; the lower anchoring assembly is used for connecting an abutment or a bridge abutment; the rectangular damping element is arranged in a vertical plane and comprises an upper transverse supporting arm, a lower transverse supporting arm and a vertical supporting arm which are used for forming a rectangle in a surrounding mode, the upper transverse supporting arm is fixedly connected with the upper anchoring assembly, and the lower transverse supporting arm is movably connected with the lower anchoring assembly; the limiting assembly is connected between the lower transverse supporting arm and the lower anchoring assembly, the limiting assembly is provided with a sliding groove structure and a limiting structure, the sliding groove structure is used for restraining movement of the rectangular damping element in the vertical plane, and the limiting structure is used for limiting the displacement amount of the rectangular damping element. Sufficient damping force and displacement capacity are provided, abnormal displacement of a bridge body under extreme conditions such as earthquakes is effectively limited, the integrity and safety of a bridge structure are guaranteed, and the beam falling prevention effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge supports, and in particular relates to a beam-falling prevention device. Background Art

[0002] When an earthquake occurs, the ground vibration causes a significant relative displacement of the bridge structure. When this displacement exceeds the originally designed shelf length of the beam end, the beam is very likely to fall. The falling beam not only seriously damages the integrity of the bridge structure, but also blocks the main traffic arteries, brings great difficulties to the rescue work, and causes huge economic losses and social impacts.

[0003] In the past earthquake disaster records, bridges, as important transportation infrastructure, have been particularly severely damaged. Under the action of external forces, the relative displacement between bridge beams may exceed the design expectations, causing the beams to fall off, and then causing safety accidents such as bridge collapse. These accidents not only threaten the safety of people's lives and property, but also pose a severe challenge to post-disaster reconstruction.

[0004] In order to meet this challenge, the engineering and academic communities are constantly exploring effective ways to improve the seismic performance of bridge structures. In this context, the research and development of anti-falling beam devices is particularly important. The anti-falling beam device aims to effectively limit the abnormal displacement of the beam under extreme conditions such as earthquakes by strengthening the connection stability between beams, thereby ensuring the integrity and safety of the bridge structure.

[0005] At present, the anti-falling beam structures widely used in engineering practices known to the inventor mainly include several forms such as block type, chain type and tenon type. The block type anti-falling beam device sets a blocking block between the beam body and the bridge pier or abutment, and uses the physical blocking effect of the blocking block to limit the displacement of the beam body. However, this structure is mostly subjected to impact loads when an earthquake occurs, and its safety is difficult to guarantee due to the uncertainty of the earthquake effect. The chain-type anti-falling beam device is fixed to the beam body and the bridge pier or abutment by bolts through guide chains, composite rubber and other materials. Although it provides a certain damping force, the overall effect is limited. The tenon type anti-falling beam device requires pre-embedded steel barrels at the beam body and the bridge pier or abutment, which not only has a great impact on the construction of the beam body and the arrangement of prestressed steel bars, but also because the tenon type anti-falling beam device is mostly slender steel bars, the damping force and displacement capacity it provides are also relatively limited.

[0006] In view of the various deficiencies of the existing anti-falling beam devices, how to provide the beam body with sufficient damping force and displacement capacity is a technical problem that needs to be solved urgently. Summary of the invention

[0007] The purpose of the present invention is to provide a beam-falling prevention device to solve the problems existing in the above-mentioned prior art. By setting a rectangular damping element and a limit assembly, a certain displacement can be allowed between the upper anchor assembly and the lower anchor assembly, and after reaching the limit displacement, the plastic deformation of the rectangular damping element is used to provide damping, thereby providing sufficient damping force and displacement capacity, more effectively limiting the abnormal displacement of the bridge beam under extreme conditions such as earthquakes, ensuring the integrity and safety of the bridge structure, and achieving the beam-falling prevention effect.

[0008] The technical solution of the present invention is: a beam-falling prevention device, comprising an upper anchor assembly, a lower anchor assembly, a rectangular damping element and a limiting assembly, wherein the upper anchor assembly is used to connect the beam body; the lower anchor assembly is used to connect the pier or abutment; the rectangular damping element is arranged in a vertical plane, and the rectangular damping element comprises an upper transverse support arm, a lower transverse support arm and a vertical support arm for forming a rectangle, the upper transverse support arm is fixedly connected to the upper anchor assembly, and the lower transverse support arm is movably connected to the lower anchor assembly; the limiting assembly is connected between the lower transverse support arm and the lower anchor assembly, and the limiting assembly has a slide groove structure and a limiting structure, the slide groove structure is used to constrain the movement of the rectangular damping element in the vertical plane, and the limiting structure is used to limit the displacement of the rectangular damping element.

[0009] Furthermore, an anti-falling beam device also includes an upper fixed plate, which includes an upper plate body and a lower stopper connected to the bottom surface of the upper plate body, the upper transverse support arm is located between the lower stoppers, and the top surface of the upper plate body is connected to the upper anchor assembly.

[0010] Furthermore, an upper protrusion is provided on the top of the upper transverse support arm, and a mounting groove is provided on the upper plate body between the lower stoppers, and the upper protrusion is plugged into the mounting groove.

[0011] Furthermore, a beam-falling prevention device also includes an embedded plate, the top surface of the embedded plate is connected to an anchor assembly, and the bottom surface of the embedded plate is connected to a fixing plate.

[0012] Furthermore, the limiting assembly includes a lower fixed plate and an I-shaped pressure plate, the I-shaped pressure plate is buckled with the lower transverse support arm and connected to the lower fixed plate, there is a gap between the I-shaped pressure plate and the top surface of the lower transverse support arm, the top surface of the lower fixed plate supports the lower transverse support arm, and the bottom surface of the lower fixed plate is connected to the lower anchor assembly.

[0013] Furthermore, an upper sliding groove is arranged on the top surface of the lower fixed plate, and a lower limit block is arranged on the bottom of the lower transverse support arm, and the lower limit block is slidably arranged in the upper sliding groove.

[0014] Furthermore, a lower sliding groove is arranged on the bottom surface of the top plate of the "X"-shaped pressure plate, and an upper limit block is arranged on the top of the lower horizontal support arm, and the upper limit block is slidably arranged in the lower sliding groove.

[0015] Furthermore, U-shaped blocks are provided on both sides of the lower transverse support arm, and the U-shaped blocks and the lower transverse support arm are located inside the "X"-shaped pressure plate.

[0016] Furthermore, the limit assembly includes a lower fixed plate, the lower fixed plate includes a lower plate body and an upper stop block connected to the top of the lower plate body, the upper stop block is L-shaped, the upper stop block and the lower plate body form a limit space for accommodating the lower horizontal support arm, and there is a gap between the upper stop block and the top surface of the lower horizontal support arm.

[0017] Furthermore, an upper sliding groove is provided on the top surface of the lower plate body, a lower limit block is provided on the bottom of the lower horizontal support arm, the lower limit block is slidably set in the upper sliding groove, and also includes a pad connected to a side of the upper stop block close to the lower horizontal support arm.

[0018] The beneficial effects of the present invention are as follows: The present invention arranges a rectangular damping element between the upper anchor assembly and the lower anchor assembly, and arranges a limit assembly between the rectangular damping element and the lower anchor assembly. On the one hand, the limit assembly is used to allow a certain displacement between the upper anchor assembly and the lower anchor assembly. On the other hand, after reaching the limit displacement, the plastic deformation of the rectangular damping element is used to provide damping, thereby providing sufficient damping force and displacement capacity, more effectively limiting the abnormal displacement of the bridge beam under extreme conditions such as earthquakes, ensuring the integrity and safety of the bridge structure, and achieving the effect of preventing the beam from falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a front view of the first embodiment of the present invention; Figure 3 A side view of an embodiment of the present invention; Figure 4 This is a schematic diagram of an upper fixing plate according to an embodiment of the present invention; Figure 5 This is a schematic diagram of a rectangular damping element according to an embodiment of the present invention; Figure 6 This is a schematic diagram of an X-shaped pressing plate according to an embodiment of the present invention; Figure 7 This is a schematic diagram of a fixing plate according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention; Fig. 9 This is a front view of the second embodiment of the present invention; Fig.10 It is a side view of the second embodiment of the present invention; Fig.11This is a schematic diagram of an upper fixing plate according to a second embodiment of the present invention; Fig.12 This is a schematic diagram of a rectangular damping element according to a second embodiment of the present invention; Fig.13 This is a schematic diagram of a X-shaped pressing plate according to a second embodiment of the present invention; Fig.14 This is a schematic diagram of a lower fixing plate according to a second embodiment of the present invention; Fig.15 This is a schematic diagram of the overall structure of Embodiment 3 of the present invention; Fig.16 This is a front view of Embodiment 3 of the present invention; Fig.17 It is a side view of the third embodiment of the present invention; Fig.18 This is a schematic diagram of an upper fixing plate according to a third embodiment of the present invention; Fig.19 This is a schematic diagram of a rectangular damping element according to a third embodiment of the present invention; Fig. 20 A schematic diagram of a rectangular damping element according to a third embodiment of the present invention being assembled with a fixing plate and a U-shaped clamping block; Fig.21 This is a schematic diagram of a lower fixing plate according to Embodiment 3 of the present invention; Among them, 1. upper anchor assembly; 2. embedded plate; 3. upper fixing plate; 4. rectangular damping element; 5. I-shaped pressure plate; 6. lower fixing plate; 7. lower anchor assembly; 8. pad; 31. Mounting slot; 32. Lower stopper; 33. Upper plate; 41. upper convex block; 42. lower limit block; 43. U-shaped block; 44. upper limit block; 51. Lower sliding groove; 61. Upper sliding groove; 62. Lower plate; 63. Upper stopper. DETAILED DESCRIPTION

[0020] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments: like Figures 1 to 21 As shown, the present invention provides a beam-falling prevention device, including an upper anchor assembly 1, a lower anchor assembly 7, a rectangular damping element 4, and a limit assembly, wherein the upper anchor assembly 1 is used to connect the beam body, and the lower anchor assembly 7 is used to connect the pier or abutment, and the anchoring connection method is a conventional technical means in the field, which will not be repeated here. The rectangular damping element 4 is arranged in a vertical plane, and the rectangular damping element 4 includes an upper transverse support arm, a lower transverse support arm, and a vertical support arm. The upper transverse support arm, the lower transverse support arm, and the vertical support arm form a rectangular damping element 4 in a rectangular shape. The rectangular damping element 4 can be integrally formed or connected and formed by segmented welding, etc., and the damping characteristics of the rectangular damping element 4 are realized by utilizing the deformable characteristics of the rectangle.

[0021] Specifically, when installing the rectangular damping element 4, it should be arranged perpendicular to the beam body, that is, the vertical plane where the rectangular damping element 4 is located is perpendicular to the length direction of the beam body, so as to provide resistance to falling beams.

[0022] Specifically, the upper transverse support arm is directly or indirectly fixedly connected to the upper anchor assembly 1, and welding can be used for the connection; the lower transverse support arm is movably connected to the lower anchor assembly 7; the overall connection form is a fixed upper part and a movable lower part. When the beam moves, energy is transferred to the rectangular damping element 4 itself or between the rectangular damping element 4 and the lower anchor assembly 7 for consumption.

[0023] Specifically, the limit assembly is connected between the lower transverse support arm and the lower anchor assembly 7. The limit assembly has a slide groove structure and a limit structure. The slide groove structure is used to constrain the movement of the rectangular damping element 4 in the vertical plane. The limit structure is used to limit the displacement of the rectangular damping element 4. Initially, the rectangular damping element 4 has a certain normal displacement. When the designed deformation displacement is exceeded, the beam body and the pier or the beam body and the abutment form an extreme pull through the rectangular damping element 4 to achieve the anti-falling beam effect.

[0024] The present invention arranges a rectangular damping element 4 between the upper anchor assembly 1 and the lower anchor assembly 7, and arranges a limit assembly between the rectangular damping element 4 and the lower anchor assembly 7. On the one hand, the limit assembly is used to allow a certain displacement between the upper anchor assembly 1 and the lower anchor assembly 7. On the other hand, after reaching the limit displacement, the plastic deformation of the rectangular damping element 4 is used to provide damping, thereby providing sufficient damping force and displacement capacity, more effectively limiting the abnormal displacement of the bridge beam under extreme conditions such as earthquakes, ensuring the integrity and safety of the bridge structure, and achieving the effect of preventing the beam from falling.

[0025] In one embodiment, if Figure 4 , Fig.11 and Fig.18 As shown, the anti-falling beam device also includes an upper fixing plate 3, which includes an upper plate body 33 and a lower stopper 32 connected to the bottom surface of the upper plate body 33. The upper plate body 33 can be rectangular or I-shaped, and the lower stopper 32 is a protruding structure extending from the upper plate body 33. It can be integrally arranged with the upper plate body 33, or it can be separately manufactured and then connected by welding or other connection methods. The upper transverse support arm is located between the lower stopper 32 and is welded with a groove. The setting of the lower stopper 32 can enhance the connection strength and stability between the upper fixing plate 3 and the rectangular damping element 4, ensuring that the upper fixing plate 3 and the rectangular damping element 4 are fixed in position. The top surface of the upper plate body 33 is used to connect the upper anchor assembly 1, and one upper plate body 33 can be connected to multiple upper anchor assemblies 1, so that the stability and firmness of the connection between the rectangular damping element 4 and the upper anchor assembly 1 are improved by the setting of the upper fixing plate 3.

[0026] In one embodiment, if Figure 4 and Fig.11 As shown, the top of the upper horizontal support arm is provided with an upper protrusion 41, and the upper plate body 33 between the lower stopper 32 is provided with a mounting groove 31, and the upper protrusion 41 can be inserted into the mounting groove 31 for plug-in connection therewith, and can be welded after plug-in. Through the connection between the upper protrusion 41 and the mounting groove 31, on the one hand, the connection strength between the rectangular damping element 4 and the upper fixing plate 3 can be enhanced, and on the other hand, relative to Fig.18 The upper plate body 33 without the mounting groove 31 and the upper plate body 33 with the mounting groove 31 can reduce the design thickness.

[0027] In one embodiment, if Figures 1 to 3 , Figures 8 to 9 , Figures 15 to 17 As shown, the anti-falling beam device also includes an embedded plate 2, the top surface of the embedded plate 2 is connected to the upper anchor assembly 1, and the bottom surface of the embedded plate 2 is connected to the upper fixed plate 3. The arrangement of the embedded plate 2 and the upper fixed plate 3 can significantly increase the connection area between the upper anchor assembly 1 and the rectangular damping element 4, thereby ensuring that the rectangular damping element 4 remains in the vertical plane, so as to realize the supporting function of the rectangular damping element 4 and smoothly play a damping role.

[0028] In one embodiment, in combination Figure 6 to Figure 7 , Figure 13 to Figure 14 As shown, the limiting assembly includes a lower fixed plate 6 and an “X”-shaped pressure plate 5. The “X”-shaped pressure plate 5 is buckled and connected to the lower fixed plate 6 to form a through space for accommodating the lower transverse support arm. The top surface of the lower fixed plate 6 is used to support the lower transverse support arm, and the bottom surface of the lower fixed plate 6 is used to connect to the lower anchor assembly 7. There is a gap between the “X”-shaped pressure plate 5 and the top surface of the lower transverse support arm to meet the angular rotation requirements of the beam body under the action of load.

[0029] In one embodiment, if Figure 5 and Figure 7 , Fig.19 and Fig.21 As shown, the top surface of the lower fixed plate 6 is provided with an upper sliding groove 61, and the bottom of the lower horizontal support arm is provided with a lower limit block 42. The lower limit block 42 is slidably arranged in the upper sliding groove 61 to form a friction pair to achieve normal displacement. The cooperation between the upper sliding groove 61 and the lower limit block 42 constrains the rectangular damping element 4 to move in the vertical plane. When the displacement of the rectangular damping element 4 reaches the limit, the lower limit block 42 and the side wall of the upper sliding groove 61 are limited, and the rectangular damping element 4 realizes energy consumption in the designed deformation displacement in the longitudinal and transverse directions through plastic deformation; when the designed deformation displacement is exceeded, the bottom of the beam and the pier or the bottom of the beam and the abutment form an extreme pull through the rectangular damping element 4 to achieve the anti-falling beam effect. A gap can be maintained between the side of the lower limit block 42 and the wall of the upper sliding groove 61 to meet the angle requirements of the beam body under the action of load.

[0030] In one embodiment, if Fig.12 and Fig.13 As shown, a lower sliding groove 51 is provided on the bottom surface of the top plate of the "X"-shaped pressure plate 5, and an upper limit block 44 is provided on the top of the lower transverse support arm. The upper limit block 44 is slidably set in the lower sliding groove 51 to form a friction pair to achieve normal displacement. The cooperation between the lower sliding groove 51 and the upper limit block 44 constrains the rectangular damping element 4 to move in the vertical plane. When the displacement of the rectangular damping element 4 reaches the limit, the upper limit block 44 and the side wall of the lower sliding groove 51 are limited, and the rectangular damping element 4 realizes energy consumption in the designed deformation displacement in the vertical and horizontal directions through plastic deformation; when the designed deformation displacement is exceeded, the bottom of the beam and the pier or the bottom of the beam and the abutment form an extreme pull through the rectangular damping element 4 to achieve the anti-falling beam effect. A gap can be maintained between the side of the upper limit block 44 and the wall of the lower sliding groove 51 to meet the turning angle requirements of the beam body under the action of load.

[0031] In one embodiment, if Figure 5 and Fig.12 As shown, U-shaped blocks 43 are provided on both sides of the lower transverse support arm, and the U-shaped blocks 43 and the lower transverse support arm are located inside the cross-shaped pressure plate 5. The U-shaped blocks 43 can be made of harder or wear-resistant materials to improve the wear resistance of the rectangular damping element 4 and increase its service life.

[0032] In one embodiment, if Fig.21 As shown, the limit assembly includes a lower fixing plate 6, and the lower fixing plate 6 includes a lower plate body 62 and an upper stopper 63 connected to the top of the lower plate body 62. The lower plate body 62 and the upper stopper 63 can be integrally formed, or separately formed and then connected by welding or the like. The upper stopper 63 is L-shaped, and the L-shaped upper stopper 63 and the lower plate body 62 form a limit space for accommodating the lower transverse support arm, and the upper stopper 63 can cover part or all of the upper part of the lower transverse support arm, and there is a gap between the upper stopper 63 and the top surface of the lower transverse support arm to meet the angle requirement of the beam body under the action of load.

[0033] In one embodiment, if Fig. 20 As shown, a U-shaped block 43 is provided at the bottom of the lower transverse support arm, and the U-shaped block 43 and the lower transverse support arm are located in the space between the upper stoppers 63. The U-shaped block 43 can be made of a harder or wear-resistant material to improve the wear resistance of the rectangular damping element 4 and increase its service life.

[0034] In one embodiment, Fig.19 and Fig.21As shown, the top surface of the lower fixed plate 6 is provided with an upper sliding groove 61, and the bottom of the lower transverse support arm is provided with a lower limit block 42, and the lower limit block 42 is slidably arranged in the upper sliding groove 61 to form a friction pair to achieve normal displacement. The cooperation between the upper sliding groove 61 and the lower limit block 42 constrains the rectangular damping element 4 to move in the vertical plane. When the displacement of the rectangular damping element 4 reaches the limit, the lower limit block 42 and the side wall of the upper sliding groove 61 are limited, and the rectangular damping element 4 realizes energy consumption in the designed deformation displacement in the longitudinal and transverse directions through plastic deformation; when the designed deformation displacement is exceeded, the bottom of the beam and the pier or the bottom of the beam and the abutment form an extreme pull through the rectangular damping element 4 to achieve the effect of preventing the beam from falling. It also includes a pad 8, which is connected to the side of the upper stop block 63 close to the lower transverse support arm. The pad 8 can be made of harder or wear-resistant materials to improve the wear resistance of the rectangular damping element 4 and increase its service life.

[0035] Reference Figure 1 to Figure 21 As shown, the present invention provides three different embodiments. According to the above content, each embodiment can achieve the technical effect of the present invention. The main difference between the embodiments is that different limiting structures are adopted, and also includes some distinguishing structural features such as the upper fixed plate 3. It should be noted that: the components of each embodiment can be freely combined and matched. According to the knowledge mastered by technical personnel in this field, all achievable methods should fall within the protection scope of the present invention.

[0036] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A beam-falling prevention device, characterized in that: include: An upper anchoring assembly, the upper anchoring assembly is used to connect the beam body; A lower anchor assembly, the lower anchor assembly is used to connect the pier or abutment; A rectangular damping element, the rectangular damping element is arranged in a vertical plane, and the rectangular damping element comprises an upper transverse support arm, a lower transverse support arm and a vertical support arm for forming a rectangle, the upper transverse support arm is fixedly connected to the upper anchor assembly, and the lower transverse support arm is movably connected to the lower anchor assembly; A limit assembly is connected between the lower transverse support arm and the lower anchor assembly. The limit assembly has a slide groove structure and a limit structure. The slide groove structure is used to constrain the movement of the rectangular damping element in the vertical plane, and the limit structure is used to limit the displacement of the rectangular damping element.

2. The beam-falling prevention device according to claim 1, characterized in that: It also includes an upper fixing plate, which includes an upper plate body and a lower stopper connected to the bottom surface of the upper plate body, the upper transverse support arm is located between the lower stoppers, and the top surface of the upper plate body is connected to the upper anchoring assembly.

3. The beam-falling prevention device according to claim 2, characterized in that: An upper protrusion is arranged on the top of the upper transverse support arm, and a mounting groove is arranged on the upper plate body between the lower stoppers, and the upper protrusion is plugged into the mounting groove.

4. The beam-falling prevention device according to claim 2, characterized in that: It also includes an embedded plate, the top surface of which is connected to an anchoring assembly, and the bottom surface of which is connected to a fixing plate.

5. The beam-falling prevention device according to any one of claims 1 to 4, characterized in that: The limiting assembly includes a lower fixed plate and an I-shaped pressure plate, the I-shaped pressure plate is buckled with the lower transverse support arm and connected to the lower fixed plate, there is a gap between the I-shaped pressure plate and the top surface of the lower transverse support arm, the top surface of the lower fixed plate supports the lower transverse support arm, and the bottom surface of the lower fixed plate is connected to the lower anchor assembly.

6. The beam-falling prevention device according to claim 5, characterized in that: An upper sliding groove is arranged on the top surface of the lower fixed plate, and a lower limit block is arranged on the bottom of the lower transverse support arm, and the lower limit block is slidably arranged in the upper sliding groove.

7. The beam-falling prevention device according to claim 5, characterized in that: A lower sliding groove is arranged on the bottom surface of the top plate of the "X"-shaped pressing plate, and an upper limit block is arranged on the top of the lower transverse support arm, and the upper limit block is slidably arranged in the lower sliding groove.

8. The beam-falling prevention device according to claim 5, characterized in that: U-shaped clamping blocks are arranged on both sides of the lower transverse support arm, and the U-shaped clamping blocks and the lower transverse support arm are located inside the "X"-shaped pressure plate.

9. The beam-falling prevention device according to any one of claims 1 to 4, characterized in that: The limiting assembly includes a lower fixed plate, which includes a lower plate body and an upper stopper connected to the top of the lower plate body, the upper stopper is L-shaped, and the upper stopper and the lower plate body form a limiting space for accommodating the lower transverse support arm, and there is a gap between the upper stopper and the top surface of the lower transverse support arm.

10. The beam-falling prevention device according to claim 9, characterized in that: The top surface of the lower plate body is provided with an upper sliding groove, the bottom of the lower horizontal support arm is provided with a lower limit block, the lower limit block is slidably arranged in the upper sliding groove, and also includes a pad, which is connected to a side of the upper stop block close to the lower horizontal support arm.

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