Hybrid Anti-falling beam device and use method therefor

Abstract

Disclosed in the present invention are a hybrid anti-falling beam device and a use method therefor. The anti-falling beam device comprises: a first connecting member, a second connecting member, a limiting component and an energy dissipation component, wherein the first connecting member is fixedly arranged on one side of a bridge pier; the second connecting member is fixedly arranged at the bottom end of an upper structure of a bridge; and the limiting component and the energy dissipation component are each connected to the first connecting member and the second connecting member by means of a first pin and a second pin, respectively. The limiting component and the energy dissipation component are arranged at suitable positions of the bridge by means of the first connecting member and the second connecting member. Moreover, when encountering small and medium-level earthquakes, the first connecting member and the second connecting member move relative to each other, such that internal components of the energy dissipation component rotate relative to each other to dissipate seismic vibration energy; and when encountering a large-level earthquake, the energy dissipation component moves to an extreme position in the limiting component, and the limiting component provides an extreme bearing capacity, thereby further achieving the function of preventing a beam from falling.

Description

Hybrid anti-collapse beam device and method of use thereof TECHNICAL FIELD

[0001] The present application belongs to the technical field of bridge shock absorption, and more particularly relates to a hybrid anti-collapse beam device and a method of use thereof. BACKGROUND

[0002] In the highway bridge system in China, small and medium span bridges account for a considerable proportion. However, such bridges are particularly vulnerable to natural disasters such as earthquakes, and the phenomenon of beam collapse is particularly prominent. Once the beam collapses, the beam end hits the pier or abutment, which not only can cause damage to the local structure, but also can even cause the collapse of the entire bridge, resulting in huge economic losses and social impact. During the Wenchuan earthquake in 2008, the beam collapse of Baihua Bridge was a typical example, which led to the collapse of the bridge pier, the cracking of the beam, and the serious damage of the abutment.

[0003] Therefore, it is of great significance to develop effective anti-collapse beam devices to improve the safety and reliability of bridge structures. According to the different working principles, the anti-collapse beam devices are mainly divided into two categories: limiting devices and damping limiting devices. Limiting devices, such as cable or steel rod limiters, are known for their high strength and strong anti-collapse beam capacity, which can effectively prevent the beam collapse of the bridge in the earthquake and protect the integrity of the bridge structure. Damping limiting devices, such as friction dampers, dissipate seismic energy through friction, effectively suppressing the vibration response of the bridge, and are favored for their strong energy dissipation capacity, stable performance, and low cost. In addition to single-function devices, there are also hybrid devices that combine limiting and damping functions. Such devices not only can effectively prevent the beam collapse of the bridge superstructure, but also perform well in energy dissipation efficiency and anti-collapse beam capacity, providing more comprehensive protection for the seismic safety of the bridge.

[0004] However, in actual engineering applications, the existing anti-collapse beam devices still have some problems: (1) Limiting devices, including cable or steel rod limiters, although have been applied in many countries and regions, often only use their elastic properties to prevent beam collapse, and do not have energy dissipation function; (2) Damping limiting devices, including friction damping limiting devices, have good energy dissipation capacity, but have small ultimate bearing capacity and weak anti-collapse beam function, and the traditional structure of friction dampers is difficult to combine with limiting devices, making it difficult to apply to bridge anti-collapse beam scenarios; (3) The existing hybrid limiting devices have complex design, high manufacturing cost, are prone to failure, and have high maintenance cost. SUMMARY

[0005] In view of the above defects or improvement needs of the prior art, the application provides a hybrid anti-falling beam device and a use method thereof, wherein the limiting component and the energy dissipation component are arranged at a suitable position of a bridge through the first connecting piece and the second connecting piece, and when a small or medium level earthquake occurs, the first connecting piece and the second connecting piece move relatively, so that the internal component of the energy dissipation component rotates relatively, the seismic vibration energy is dissipated through the internal friction damping force, and the bridge vibration response is attenuated; when a large level earthquake occurs, the energy dissipation component moves to the limit position in the limiting component, the limiting component provides a limit bearing capacity, and the anti-falling beam function is further realized, in addition, the limiting component and the energy dissipation component are easy to process and convenient to assemble, the manufacturing and maintenance costs are effectively saved, and the practical engineering application is beneficial.

[0006] In order to achieve the above-mentioned purpose, the application provides a hybrid anti-falling beam device, comprising: a first connecting piece, a second connecting piece, a limiting component and an energy dissipation component, wherein:

[0007] The first connecting piece comprises a first support plate and a first ear plate; the first support plate is fixedly connected with a pier through a fastening bolt; one end of the first ear plate is fixedly arranged on one side of the first support plate, and the other end is fixedly provided with a first joint bearing;

[0008] The second connecting piece comprises a second support plate and a second ear plate; the second support plate is fixedly connected with the bottom end of the upper structure of the bridge through a fastening bolt; one end of the second ear plate is fixedly arranged on one side of the second support plate, and the other end is fixedly provided with a through hole;

[0009] The limiting component comprises a first bolt, a second bolt and a rigging;

[0010] The first bolt passes through the first joint bearing, the rigging and the energy dissipation component respectively; the second bolt passes through the second ear plate, the rigging and the energy dissipation component respectively; the rigging is sleeved outside the first bolt and the second bolt at both ends.

[0011] The energy dissipation component comprises a damping component; the damping component is connected with the first connecting piece and the second connecting piece at both ends through the first bolt and the second bolt; the seismic vibration energy is dissipated through the internal friction damping force of the damping component, and a limit bearing capacity is provided through the limiting component, and the anti-falling beam function is further realized.

[0012] Further, the damping component comprises: rotating plates and a connecting assembly; one end of three rotating plates is connected through the connecting assembly, and the other end of the rotating plate in the middle is connected with the second lug through the second bolt and arranged between the two second lugs, and the other end of the rotating plate on the front side and the back side is connected with the first lug through the first bolt and arranged between the first lug and the rigging, respectively.

[0013] Further, the rotating plate is a rotating plate with semicircular ends and a rectangular plate in the middle, and a through hole for connection is arranged at the center of the semicircular end of the two semicircular ends.

[0014] Further, a second joint bearing is arranged in the through hole at one end of the rotating plate in the middle, and the second joint bearing is matched with the second bolt.

[0015] Further, the connecting assembly comprises: a gasket, a disc spring, a friction ring and a pre-tightening bolt; the gasket is tightly attached to the disc spring, and two groups of the gasket and the disc spring are mirror-symmetrically arranged on the outside of the rotating plate on the front side and the rotating plate on the back side, respectively; two friction rings are arranged between the three rotating plates, respectively; the middle part of the gasket, the disc spring and the friction ring is fixedly provided with a through hole matched with the pre-tightening bolt; the pre-tightening bolt passes through the three rotating plates, the two gaskets, the two disc springs and the two friction rings, so that the connecting assembly tightly connects the three rotating plates; the pre-tightening bolt is a non-contact ultrasonic shaft force bolt.

[0016] Further, the rigging is mainly prepared from rust-proof metal parts.

[0017] Further, the rigging comprises a steel wire rope, both ends of the steel wire rope are tightly sleeved on the outside of the first bolt and the second bolt through a steel wire rope clamp, and the contact area between the steel wire rope and the first bolt and the second bolt is provided with rubber material.

[0018] Further, the first lug is a U-shaped plate, and the first joint bearing is arranged at the center of the semicircular end of one end thereof; the first lug is at least one.

[0019] Further, the second lug is a U-shaped plate, and the through hole is arranged at the center of the semicircular end of one end thereof; the second lug is at least two, and a plurality of the second lugs are parallel to each other.

[0020] Another aspect of the present application provides a use method of the mixed anti-falling beam device, which is realized by using the anti-falling beam device as described above, and comprises the following steps:

[0021] S1: check the structural stability of the first connecting piece, the second connecting piece, the limiting component and the energy dissipation component, and ensure that they can be normally installed and used;

[0022] S2: respectively set the first connecting piece and the second connecting piece at suitable positions of the pier and the bridge superstructure, and then connect the rigging and the energy consumption component with the first connecting piece and the second connecting piece through the first bolt and the second bolt, namely, complete the installation of the anti-falling beam device;

[0023] S3: during the service of the anti-falling beam device, when encountering small and medium earthquakes, the first connecting piece and the second connecting piece move relatively, so that the rotating plates on the front side and the rear side rotate relative to the rotating plate in the middle with respect to the connecting assembly, thereby reducing the vibration response of the bridge.

[0024] S4: when encountering large earthquakes, the rotating plates on the front side and the rear side and the rotating plate in the middle reach the maximum angle with the connecting assembly as the vertex, and the rigging connected with the first bolt and the second bolt respectively changes from the relaxed state to the limit state of the tight state, and the limiting component provides the limit bearing capacity.

[0025] S5: during the service of the anti-falling beam device, the anti-falling beam device is monitored in real time through the pre-tightening bolt in the connecting assembly, thereby reducing the maintenance difficulty.

[0026] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects:

[0027] 1. The anti-falling beam device of the present application firmly fixes the limiting component and the energy consumption component in the suitable position of the bridge through the first connecting piece and the second connecting piece, and when encountering small and medium earthquakes, the first connecting piece and the second connecting piece move relatively, so that the internal components of the energy consumption component rotate relatively, and through the internal friction damping force, the seismic vibration energy is dissipated, and the bridge vibration response is attenuated; when encountering large earthquakes, the energy consumption component moves to the limit position in the limiting component, and the limiting component provides the limit bearing capacity, thereby further realizing the anti-falling beam function. In addition, the limiting component and the energy consumption component are easy to process and convenient to assemble, effectively saving the manufacturing and maintenance costs, and being beneficial to practical engineering application.

[0028] 2. The anti-falling beam device of the present application generates a friction torque that hinders the relative rotation of the rotating plates by setting a friction ring between the rotating plates connected with the first connecting piece and the second connecting piece, and converts it into a friction damping force that hinders the relative movement of the first connecting piece and the second connecting piece through the rotating plates, thereby realizing energy dissipation and further reducing the vibration amplitude of the bridge.

[0029] 3. The anti-falling beam device of the present application, by setting the length of the rigging, so that during non-earthquake or small, medium earthquake, the rigging is in a relaxed state, and is always above the connecting assembly, avoiding the rigging from winding with the damping part, at the same time, when encountering a large earthquake, the maximum angle between the front and rear rotating plates and the middle rotating plate is reached with the connecting assembly as the vertex, the rigging changes from a relaxed state to a tight state, at this time, the limiting part provides the ultimate bearing capacity.

[0030] 4. The anti-falling beam device of the present application, by the rigging, combined with the first joint bearing and the second joint bearing, further improves the adaptability of the anti-falling beam device to the angle deformation generated by the bridge vibration, improves the service life of the anti-falling beam device, at the same time, by using a single friction damper, that is, the damping part, cooperates with several riggings to achieve the effect of preventing the beam from falling, thereby reducing the overall size of the anti-falling beam device, improving the flexibility and practicality of the anti-falling beam device. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic diagram of the anti-falling beam device of the embodiment of the present application;

[0032] Figure 2 is a top view of the anti-falling beam device of the embodiment of the present application;

[0033] Figure 3 is a side view of the anti-falling beam device of the embodiment of the present application;

[0034] Figure 4 is a structural schematic diagram of the first damping part of the embodiment of the present application;

[0035] Figure 5 is a structural schematic diagram of the anti-falling beam device of the embodiment of the present application in a tight state of the rigging;

[0036] Figure 6 is a step flow chart of the use method of the anti-falling beam device of the embodiment of the present application.

[0037] In all the drawings, the same reference signs represent the same technical features, specifically: 1-first connecting piece, 11-first support plate, 12-first ear plate, 121-first joint bearing, 2-second connecting piece, 21-second support plate, 22-second ear plate, 31-first bolt, 32-second bolt, 4-rigging, 5-damping part, 51-rotating plate, 511-second joint bearing, 52-connecting assembly, 521-spacer, 522-disc spring, 523-friction ring, 524-pre-tightening bolt. DETAILED DESCRIPTION

[0038] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0039] As shown in FIGS. 1-5, one embodiment of the present application provides a hybrid anti-falling beam device, comprising: a first connecting piece 1, a second connecting piece 2, a limiting component and an energy dissipation component; the first connecting piece 1 is fixedly arranged on one side of the pier; the second connecting piece 2 is fixedly arranged at the bottom end of the upper structure of the bridge; the limiting component and the energy dissipation component are connected with the first connecting piece 1 and the second connecting piece 2 through the first bolt 31 and the second bolt 32 respectively; in the actual engineering application of the anti-falling beam device, the limiting component and the energy dissipation component are arranged at the appropriate position of the bridge through the first connecting piece 1 and the second connecting piece 2, and at the same time, when encountering small and medium earthquakes, the first connecting piece 1 and the second connecting piece 2 move relatively, so that the internal components of the energy dissipation component rotate relatively, dissipate the seismic vibration energy through the internal friction damping force, and attenuate the bridge vibration response; when encountering large earthquakes, the energy dissipation component moves to the limit position in the limiting component, the limiting component provides the limit bearing capacity, and further realizes the anti-falling beam function, in addition, the limiting component and the energy dissipation component are easy to process and assemble, effectively saving the manufacturing and maintenance costs, and beneficial to the practical engineering application.

[0040] Specifically, as shown in FIGS. 1-3, the first connecting piece 1 is fixedly arranged on one side of the pier for stably supporting the limiting component and the energy dissipation component, which comprises: a first support plate 11 and a first ear plate 12;

[0041] The first support plate 11 is fixedly connected with the pier through a fastening bolt for providing sufficient support.

[0042] One end of the first ear plate 12 is fixedly arranged on one side of the first support plate 11, and the other end is fixedly arranged with a first joint bearing 121 for stably connecting the limiting component and the energy dissipation component, adapting to the angular deformation when the bridge vibrates, and improving the practicability of the anti-falling beam device;

[0043] Preferably, the first ear plate 12 is a U-shaped plate, and the first joint bearing 121 is arranged at the center of the semicircular end of one end of the first ear plate 12 for improving the stability of the first connecting piece 1;

[0044] Preferably, the first ear plate 12 is at least one.

[0045] Specifically, as shown in FIGS. 1-3, the second connecting member 2 is fixedly arranged at the bottom end of the bridge superstructure, for stably supporting the limiting component and the energy dissipation component, which comprises a second support plate 21 and a second lug plate 22.

[0046] The second support plate 21 is fixedly connected with the bottom end of the bridge superstructure through fastening bolts, for providing sufficient support.

[0047] Preferably, the second support plate 21 is an L-shaped support plate, and a rib plate is fixedly arranged on the inner side of the L-shaped support plate, and the upper end of one side of the L-shaped support plate is connected with the bridge superstructure.

[0048] The second lug plate 22 is fixedly arranged at one side of the second support plate 21 at one end, and a through hole is fixedly arranged at the other end, for stably connecting the limiting component and the energy dissipation component.

[0049] Preferably, the second lug plate 22 is a U-shaped plate, and the through hole is arranged at the center of the semicircular end of one end of the U-shaped plate, for improving the stability of the second connecting member 2.

[0050] Preferably, the second lug plate 22 is at least two, and a plurality of the second lug plates 22 are parallel to each other.

[0051] Specifically, as shown in FIGS. 1-3 and 5, the limiting component is connected with the first connecting member 1 and the second connecting member 2, for providing extreme bearing capacity, thereby preventing the bridge superstructure from falling, which comprises a first bolt 31, a second bolt 32 and a cable 4.

[0052] The first bolt 31 passes through the first joint bearing 121, the cable 4 and the energy dissipation component, respectively.

[0053] The second bolt 32 passes through the second lug plate 22, the cable 4 and the energy dissipation component, respectively.

[0054] Preferably, one end of the first bolt 31 and the second bolt 32 is provided with a bolt head, and the other end is provided with a safety device such as a safety pin or a lock catch, so that the cable 4 and the second lug plate 22 do not fall off during use, thereby improving the safety of the anti-falling device.

[0055] The cable 4 is sleeved outside the first bolt 31 and the second bolt 32 at both ends, and the cable 4 is arranged outside the damping component 5.

[0056] Preferably, the cable 4 is mainly prepared from a rust-proof metal piece.

[0057] Preferably, the cable 4 comprises components such as iron chains and steel wire ropes.

[0058] In an optional embodiment, the rigging 4 is a steel wire rope, and the two ends of the steel wire rope are tightly sleeved outside the first bolt 31 and the second bolt 32 respectively through a steel wire rope clamp, so as to ensure that the steel wire rope does not fall out of the first bolt 31 in the case of vibration, improve the assembly safety, and at the same time, the contact area between the steel wire rope and the first bolt 31 and the second bolt 32 is provided with rubber material, so as to improve the durability of the device and prolong the service life.

[0059] Specifically, as shown in FIGS. 1-5, the energy dissipation component is connected with the first connecting piece 1 and the second connecting piece 2 respectively for dissipating the seismic vibration energy and attenuating the bridge vibration response, which comprises a damping component 5.

[0060] The damping component 5 is connected with the first connecting piece 1 and the second connecting piece 2 at both ends through the first bolt 31 and the second bolt 32 respectively, which comprises a rotating plate 51 and a connecting assembly 52.

[0061] One end of each of the three rotating plates 51 is connected through the connecting assembly 52, and at the same time, the other end of the middle rotating plate 51 is connected with the second ear plate 22 through the second bolt 32 and arranged between the two second ear plates 22, and the other end of the front and rear rotating plates 51 is connected with the first ear plate 12 through the first bolt 31 and arranged between the first ear plate 12 and the rigging 4 respectively.

[0062] Preferably, the rotating plate 51 is a rotating plate with semicircular ends and a rectangular plate in the middle, and a through hole for connection is arranged at the center of each of the two semicircular ends.

[0063] Preferably, a second joint bearing 511 is arranged in the through hole at one end of the middle rotating plate 51, and the second joint bearing 511 is adapted to the second bolt 32, so as to further improve the adaptability of the anti-collapse device to the angular deformation generated by the bridge vibration and prolong the service life of the anti-collapse device.

[0064] The connecting assembly 52 comprises a gasket 521, a disc spring 522, a friction ring 523 and a pre-tightening bolt 524.

[0065] Preferably, the middle of each of the gasket 521, the disc spring 522 and the friction ring 523 is fixedly provided with a through hole adapted to the pre-tightening bolt 524.

[0066] The gasket 521 and the disc spring 522 are tightly attached, and the two groups of gaskets 521 and disc springs 522 are mirror-symmetrically arranged outside the front rotating plate 51 and the rear rotating plate 51 respectively, so as to uniformly apply the pre-tightening force of the pre-tightening bolt 524 to the several rotating plates 51.

[0067] Two of the friction rings 523 are respectively arranged between three of the rotating plates 51.

[0068] Preferably, the rotating plates 51 and the friction rings 523 have the same thickness.

[0069] The pre-tightening bolts 524 pass through three of the rotating plates 51, two of the gaskets 521, two of the disc springs 522 and two of the friction rings 523, so as to tightly connect the connecting assembly 52 to three of the rotating plates 51.

[0070] Preferably, the pre-tightening bolts 524 are non-contact ultrasonic torque measurement bolts, which can provide scientific basis for maintenance of the friction damper by real-time feedback of working performance.

[0071] Preferably, the length of the cable 4 is such that the cable 4 is in a relaxed state during non-seismic periods or when a small, medium or large earthquake occurs, and is always above the connecting assembly 52, so as to avoid entanglement of the cable 4 with the damping component 5, and at the same time, when a large earthquake occurs, the rotating plates 51 at the front and rear sides and the rotating plates 51 at the middle reach the maximum angle with the connecting assembly 52 as the vertex, and the cable 4 changes from the relaxed state to the limit state of tightness, at which time, the limiting component provides the limit bearing capacity.

[0072] Preferably, the length of the cable 4 between the first bolt 31 and the second bolt 32 is less than twice the distance between the through holes at the two ends of the rotating plate 51.

[0073] As shown in FIG. 6, another embodiment of the application provides a method for using the hybrid anti-falling beam device, which comprises the following steps:

[0074] S1: Check the structural stability of the first connecting piece 1, the second connecting piece 2, the limiting component and the energy dissipation component, and ensure that they can be normally installed and used;

[0075] S2: Arrange the first connecting piece 1 and the second connecting piece 2 on the bridge pier and the upper structure of the bridge, respectively, and then connect the cable 4 and the energy dissipation component to the first connecting piece 1 and the second connecting piece 2 through the first bolt 31 and the second bolt 32, respectively, so as to complete the installation of the anti-falling beam device;

[0076] S3: During the service of the anti-falling beam device, when a small, medium or large earthquake occurs, the first connecting piece 1 and the second connecting piece 2 move relatively, so that the rotating plates 51 at the front and rear sides and the rotating plates 51 at the middle rotate relative to the connecting assembly 52, thereby reducing the vibration response of the bridge.

[0077] S4: When encountering a large earthquake, the front and rear rotating plates 51 and the middle rotating plate 51 reach the maximum angle at the connecting assembly 52, and the rigging 4 connected with the first bolt 31 and the second bolt 32 is changed from a relaxed state to a limit state of a tight state, and the limiting component provides a limit bearing capacity;

[0078] S5: During the service of the beam falling prevention device, the beam falling prevention device is monitored in real time by the pre-tightening bolt 524 in the connecting assembly 52, and the maintenance difficulty is reduced.

[0079] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0080] In addition, if the embodiments of the present application involve descriptions of “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0081] In the present patent, the terms “include”, “contain” or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the elements defined by the statement “include” do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0082] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; those skilled in the art can easily understand that the above description is only the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A hybrid anti-collapse device and method of use thereof, characterized in that, The utility model relates to a bridge anti-falling device, including: First connecting piece (1), second connecting piece (2), limiting part and energy consumption part, wherein: The first connecting piece (1) includes: first support plate (11) and first lug plate (12), the first support plate (11) is fixedly connected with pier through fastening bolt, one end of first lug plate (12) is fixedly arranged on one side of first support plate (11), and the other end is fixedly provided with first joint bearing (121), The second connecting piece (2) includes: second support plate (21) and second lug plate (22), the second support plate (21) is fixedly connected with the bottom end of bridge superstructure through fastening bolt, one end of second lug plate (22) is fixedly arranged on one side of second support plate (21), and the other end is fixedly provided with through hole, The limiting part includes: first bolt (31), second bolt (32) and rigging (4), The first bolt (31) passes through first joint bearing (121), rigging (4) and energy consumption part respectively, the second bolt (32) passes through second lug plate (22), rigging (4) and energy consumption part respectively, and the rigging (4) is sleeved on the outer side of first bolt (31) and second bolt (32) respectively at both ends, The energy consumption part includes: damping part (5), the damping part (5) is connected with first connecting piece (1) and second connecting piece (2) through first bolt (31) and second bolt (32) at both ends respectively, dissipates seismic vibration energy through the friction damping force in damping part (5), and the limiting part provides ultimate bearing capacity, further realizes the function of anti-falling beam.

2. The fall prevention device of claim 1, wherein The damping part (5) includes: rotating plate (51) and connecting assembly (52), one end of three rotating plates (51) is connected through connecting assembly (52), meanwhile, the other end of middle rotating plate (51) is connected with second lug plate (22) through second bolt (32) and is arranged between two second lug plates (22), and the other end of front and rear rotating plates (51) is connected with first lug plate (12) through first bolt (31) and is arranged between first lug plate (12) and rigging (4) respectively.

3. The fall prevention device of claim 2, wherein, The rotating plate (51) is a rotating plate with semicircle at both ends and rectangular plate in the middle, and through holes for connection are arranged at the centers of two semicircle ends.

4. The fall prevention device of claim 3, wherein, The other end of middle rotating plate (51) is provided with second joint bearing (511) in the through hole, and the second joint bearing (511) is matched with second bolt (32).

5. The fall prevention device of claim 2, wherein, The connecting assembly (52) comprises: a gasket (521), a disc spring (522), a friction ring (523) and a pre-tightening bolt (524); the gasket (521) is tightly attached to the disc spring (522), and two sets of the gasket (521) and the disc spring (522) are symmetrically arranged outside the front rotating plate (51) and the rear rotating plate (51) respectively; two friction rings (523) are arranged between the three rotating plates (51) respectively; the middle part of the gasket (521), the disc spring (522) and the friction ring (523) is fixedly provided with a through hole matched with the pre-tightening bolt (524); the pre-tightening bolt (524) penetrates through the three rotating plates (51), the two gaskets (521), the two disc springs (522) and the two friction rings (523), so that the connecting assembly (52) tightly connects the three rotating plates (51); the pre-tightening bolt (524) is a non-contact ultrasonic shaft force measuring bolt.

6. The anti-collapse device according to any one of claims 1 to 5, wherein, The rigging (4) is mainly prepared from rust-proof metal parts.

7. The fall prevention device of claim 6, wherein, The rigging (4) comprises a steel wire rope, both ends of the steel wire rope are tightly sleeved outside the first bolt (31) and the second bolt (32) through a steel wire rope clamp, and the contact area between the steel wire rope and the first bolt (31) and the second bolt (32) is provided with rubber material.

8. The anti-collapse device of any one of claims 1 to 5, wherein, The first ear plate (12) is a U-shaped plate, and the first joint bearing (121) is arranged at the center of the semicircular end of one end thereof; the first ear plate (12) is at least one.

9. The anti-collapse device of any one of claims 1 to 5, wherein, The second ear plate (22) is a U-shaped plate, and the through hole is arranged at the center of the semicircular end of one end thereof; the second ear plate (22) is at least two, and a plurality of the second ear plates (22) are parallel to each other.

10. A method of using a hybrid buckling restraining device, implemented using the buckling restraining device of any one of claims 1-9, wherein, The method comprises the following steps: S1: check the structural stability of the first connecting piece (1), the second connecting piece (2), the limiting part and the energy consumption part to ensure normal installation and use; S2: respectively arrange the first connecting piece (1) and the second connecting piece (2) on the bridge pier and the upper structure of the bridge at appropriate positions, then connect the rigging (4) and the energy consumption part with the first connecting piece (1) and the second connecting piece (2) through the first bolt (31) and the second bolt (32) respectively, that is, complete the installation of the anti-falling beam device; S3: during the service of the anti-falling beam device, when a small or medium level earthquake is encountered, the first connecting piece (1) and the second connecting piece (2) move relatively, so that the front and rear rotating plates (51) and the middle rotating plate (51) rotate relative to the connecting assembly (52), thereby reducing the vibration response of the bridge; S4: when a large level earthquake is encountered, the front and rear rotating plates (51) and the middle rotating plate (51) reach the maximum angle with the connecting assembly (52) as the vertex, and the rigging (4) connected with the first bolt (31) and the second bolt (32) respectively changes from a relaxed state to a limit state of being tightly stretched, and the limiting part provides a limit bearing capacity. S5: During the service of the anti-collapse device, the anti-collapse device is monitored in real time through the pre-tightening bolt (524) in the connecting assembly (52), reducing the difficulty of maintenance.

Images