Mixed anti-beam-falling device and using method thereof

Abstract

The invention discloses a mixed anti-beam-falling device and a using method thereof. The mixed anti-beam-falling device comprises a first connecting piece, a second connecting piece, a limiting component and an energy consumption component. The first connecting piece is fixedly arranged on one side of the bridge pier; the second connecting piece is fixedly arranged at the bottom end of the bridge superstructure; the limiting component and the energy consumption component are connected with the first connecting piece and the second connecting piece through a first plug pin and a second plug pin respectively. The limiting component and the energy consumption component are arranged at proper positions of a bridge through the first connecting piece and the second connecting piece, and meanwhile, when a small-grade earthquake and a medium-grade earthquake happen, the first connecting piece and the second connecting piece move relatively, so that internal components of the energy consumption component rotate relatively, and earthquake vibration energy is dissipated; when a large-level earthquake occurs, the energy dissipation component moves to the limit position in the limiting component, the limiting component provides the limit bearing capacity, and the beam falling prevention function is further achieved.

Description

Technical Field

[0001] This invention belongs to the field of bridge vibration reduction technology, and more specifically, relates to a hybrid anti-fall beam device and its usage method. Background Technology

[0002] In my country's highway bridge system, small and medium-span bridges account for a considerable proportion. However, these bridges are particularly vulnerable to natural disasters such as earthquakes, and the phenomenon of beam collapse is especially prominent. Once a beam collapses, the beam end impacts the pier or abutment, which may not only cause damage to the local structure but may even lead to the collapse of the entire bridge, resulting in huge economic losses and social impact.

[0003] Therefore, developing effective anti-falling beam devices is crucial for improving the safety and reliability of bridge structures. Based on their working principles, anti-falling beam devices are mainly divided into two categories: limiting devices and damping limiting devices. Limiting devices, such as cable or steel bar limiters, are renowned for their high strength and powerful anti-falling beam capabilities, effectively preventing bridge beams from falling during earthquakes and ensuring the integrity of the bridge structure. Damping limiting devices, such as friction dampers, dissipate seismic energy through friction, effectively suppressing the bridge's vibration response. They are favored for their high energy dissipation capacity, stable performance, and low cost. Besides single-function devices, there are also hybrid devices that combine limiting and damping functions. These devices not only effectively prevent the bridge superstructure from falling but also excel in energy dissipation efficiency and anti-falling beam capabilities, providing more comprehensive protection for the seismic safety of bridges.

[0004] However, in practical engineering applications, the existing anti-fall beam devices still have the following problems: (1) Limiting devices, including cable or steel bar limiters, although used in bridge structures in many countries and regions, often only use their elastic properties to prevent beams from falling, and they do not have the function of dissipating energy; (2) Damping limiting devices, including friction damping limiting devices, although they have good energy dissipation capabilities, have a small ultimate bearing capacity and weak anti-fall beam function. At the same time, the traditional friction damper structure is difficult to combine with the limiting device and is not easy to apply to bridge anti-fall beam scenarios; (3) The existing hybrid limiting devices are relatively complex in design, have high manufacturing costs, are prone to failure, and have high maintenance costs. Summary of the Invention

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a hybrid anti-falling beam device and its usage method. The limiting component and the energy-dissipating component are positioned at appropriate locations on the bridge via the first and second connecting members. Simultaneously, during minor or medium-level earthquakes, the first and second connecting members move relative to each other, causing relative rotation of the internal components of the energy-dissipating component. Through internal frictional damping forces, the seismic energy is dissipated, attenuating the bridge's vibration response. During major earthquakes, the energy-dissipating component moves to its limit position within the limiting component, which then provides ultimate bearing capacity, further achieving the anti-falling beam function. Furthermore, the limiting component and the energy-dissipating component are easy to process and convenient to assemble, effectively saving manufacturing and maintenance costs and benefiting practical engineering applications.

[0006] To achieve the above objectives, the present invention provides a hybrid anti-falling beam device, comprising: a first connector, a second connector, a limiting component, and an energy-dissipating component, wherein:

[0007] The first connecting member includes: a first support plate and a first ear plate; the first support plate is fixedly connected to the bridge pier by fastening bolts; one end of the first ear plate is fixedly disposed on one side of the first support plate, and the other end is fixedly disposed on a first joint bearing;

[0008] The second connecting member includes: a second support plate and a second ear plate; the second support plate is fixedly connected to the bottom end of the bridge superstructure by fastening bolts; one end of the second ear plate is fixedly disposed on one side of the second support plate, and the other end is fixedly provided with a through hole;

[0009] The limiting component includes: a first pin, a second pin, and a rigging;

[0010] The first pin passes through the first joint bearing, the rigging, and the energy-consuming component; the second pin passes through the second ear plate, the rigging, and the energy-consuming component; both ends of the rigging are respectively sleeved on the outside of the first pin and the second pin;

[0011] The energy-dissipating component includes a damping component; both ends of the damping component are connected to the first connector and the second connector respectively through the first pin and the second pin; the damping component dissipates seismic vibration energy through internal frictional damping force, and provides ultimate bearing capacity through the limiting component, thereby further realizing the function of preventing beam fall.

[0012] Furthermore, the damping component includes: a rotating plate and a connecting assembly; one end of the three rotating plates is connected by the connecting assembly, while the other end of the middle rotating plate is connected to the second ear plate through the second pin and is disposed between the two second ear plates, and the other ends of the front and rear rotating plates are connected to the first ear plate through the first pin and are respectively disposed between the first ear plate and the rigging.

[0013] Furthermore, the rotating plate is a rotating plate with semicircles at both ends and a rectangular plate in the middle, and each of the two semicircular ends is provided with a through hole for connection.

[0014] Furthermore, a second joint bearing is provided at one end of the rotating plate in the middle, and the second joint bearing is adapted to the second pin.

[0015] Furthermore, the connecting assembly includes: a washer, a disc spring, a friction ring, and a preload bolt; the washer is tightly fitted to the disc spring, and two sets of washer and disc spring are mirror-symmetrical and respectively located on the outer side of the front rotating plate and the rear rotating plate; two friction rings are respectively located between the three rotating plates; the washer, the disc spring, and the friction ring are all fixedly provided with through holes adapted to the preload bolt in the middle; the preload bolt passes through the three rotating plates, the two washer, the two disc springs, and the two friction rings, so that the connecting assembly tightly connects the three rotating plates; the preload bolt is a non-contact ultrasonic axial force measuring bolt.

[0016] Furthermore, the rigging is mainly made of rust-proofed metal parts.

[0017] Furthermore, the rigging includes a steel wire rope, with both ends of the steel wire rope tightly fitted onto the outside of the first pin and the second pin respectively by steel wire rope clamps, and the contact area between the steel wire rope and the first pin and the second pin is provided with rubber material.

[0018] Furthermore, the first ear plate is a U-shaped plate, and the first joint bearing is located at the center of one of its semi-circular ends; there is at least one first ear plate.

[0019] Furthermore, the second ear plate is a U-shaped plate, and the through hole is located at the center of one semi-circular end; there are at least two second ear plates, and several second ear plates are parallel to each other.

[0020] Another aspect of the present invention provides a method for using a hybrid anti-falling beam device, implemented by applying the anti-falling beam device as described above, comprising the following steps:

[0021] S1: Check the structural stability of the first connector, the second connector, the limiting component, and the energy-consuming component to ensure that they can be installed and used normally;

[0022] S2: Place the first connector and the second connector at appropriate positions on the bridge pier and the superstructure of the bridge, respectively. Then, connect the rigging and the energy-consuming component to the first connector and the second connector respectively through the first pin and the second pin, thereby completing the installation of the anti-falling beam device.

[0023] S3: During the service of the anti-falling beam device, when encountering a small or medium-level earthquake, the first connecting member and the second connecting member move relative to each other, causing the front and rear rotating plates and the middle rotating plate to rotate relative to the connecting assembly, thereby reducing the bridge vibration response.

[0024] S4: When encountering a large-scale earthquake, the rotating plates on the front and rear sides and the rotating plate in the middle reach the maximum angle with the connecting component as the vertex. The rigging connected to the first pin and the second pin respectively changes from a slack state to a taut state at the limit state, and the limiting component provides the ultimate bearing capacity.

[0025] S5: During the service life of the anti-fall beam device, the anti-fall beam device is monitored in real time through the pre-tightening bolts in the connecting assembly, reducing the difficulty of maintenance.

[0026] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0027] 1. The anti-falling beam device of the present invention securely fixes the limiting component and the energy dissipating component to a suitable position on the bridge through the first connecting member and the second connecting member. Simultaneously, during minor or medium-level earthquakes, the first connecting member and the second connecting member move relative to each other, causing the internal components of the energy dissipating component to rotate relative to each other. Through internal frictional damping force, the seismic vibration energy is dissipated, attenuating the bridge's vibration response. During major earthquakes, the energy dissipating component moves to its limit position within the limiting component, which then provides ultimate bearing capacity, further realizing the anti-falling beam function. Furthermore, the limiting component and the energy dissipating component are easy to process and convenient to assemble, effectively saving manufacturing and maintenance costs and benefiting practical engineering applications.

[0028] 2. The anti-falling beam device of the present invention generates a frictional torque that hinders the relative rotation of the rotating plates by setting a friction ring between a plurality of rotating plates that are respectively connected to the first connecting member and the second connecting member. The frictional torque is then converted into a frictional damping force that hinders the relative movement of the first connecting member and the second connecting member by the plurality of rotating plates, thereby reducing energy consumption and further reducing the vibration amplitude of the bridge.

[0029] 3. The anti-fall beam device of the present invention, by setting the length of the rigging, ensures that during non-earthquake periods or small to medium-level earthquakes, the rigging is in a slack state and is always above the connecting assembly, preventing the rigging from tangling with the damping component. At the same time, in the event of a large-scale earthquake, the front and rear rotating plates and the middle rotating plate reach their maximum angle with the connecting assembly as the apex, and the rigging changes from a slack state to a taut state at its limit. At this time, the limiting component provides the ultimate bearing capacity.

[0030] 4. The anti-falling beam device of the present invention, through the rigging and in combination with the first joint bearing and the second joint bearing, further improves the adaptability of the anti-falling beam device to the angular deformation caused by bridge vibration, and increases the service life of the anti-falling beam device. At the same time, by using a single friction damper, i.e. the damping component, in conjunction with several rigging to achieve the anti-falling beam effect, the overall size of the anti-falling beam device is reduced, thereby improving the flexibility and practicality of the anti-falling beam device. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the anti-falling beam device according to an embodiment of the present invention;

[0032] Figure 2 This is a top view of the anti-falling beam device according to an embodiment of the present invention;

[0033] Figure 3 This is a side view of the anti-falling beam device according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the first damping component according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the anti-falling beam device when the rigging is in a taut state, according to an embodiment of the present invention;

[0036] Figure 6 This is a flowchart illustrating the steps of using the anti-falling beam device according to an embodiment of the present invention.

[0037] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-first connector, 11-first support plate, 12-first lug plate, 121-first spherical bearing, 2-second connector, 21-second support plate, 22-second lug plate, 31-first pin, 32-second pin, 4-rigging, 5-damping component, 51-rotating plate, 511-second spherical bearing, 52-connecting assembly, 521-washer, 522-disc spring, 523-friction ring, 524-preload bolt. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0039] like Figures 1 to 5 As shown, one embodiment of the present invention provides a hybrid anti-falling beam device, comprising: a first connecting member 1, a second connecting member 2, a limiting component, and an energy-dissipating component; the first connecting member 1 is fixedly disposed on one side of the bridge pier; the second connecting member 2 is fixedly disposed on the bottom end of the bridge superstructure; the limiting component and the energy-dissipating component are respectively connected to the first connecting member 1 and the second connecting member 2 via a first pin 31 and a second pin 32; in the actual engineering application of the anti-falling beam device, the limiting component and the energy-dissipating component are disposed on a suitable bridge pier via the first connecting member 1 and the second connecting member 2. In the event of a minor or moderate earthquake, the first connecting member 1 and the second connecting member 2 move relative to each other, causing the internal components of the energy-dissipating component to rotate relative to each other. Through the internal frictional damping force, the seismic vibration energy is dissipated, and the bridge vibration response is attenuated. In the event of a major earthquake, the energy-dissipating component moves to its limit position within the limiting component, which then provides the ultimate bearing capacity, further realizing the function of preventing beam collapse. In addition, the limiting component and the energy-dissipating component are easy to process and convenient to assemble, effectively saving manufacturing and maintenance costs and benefiting practical engineering applications.

[0040] Specifically, such as Figures 1 to 3 As shown, the first connector 1 is fixedly disposed on one side of the bridge pier to stably support the limiting component and the energy-consuming component, and includes: a first support plate 11 and a first ear plate 12;

[0041] The first support plate 11 is fixedly connected to the bridge pier by fastening bolts to provide sufficient support.

[0042] One end of the first ear plate 12 is fixedly disposed on one side of the first support plate 11, and the other end is fixedly disposed on the first joint bearing 121, which is used to stably connect the limiting component and the energy dissipation component, adapt to the angular deformation when the bridge vibrates, and improve the practicality 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 located at the center of one semi-circular end of the first ear plate to improve the stability of the first connector 1.

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

[0045] Specifically, such as Figures 1 to 3 As shown, the second connector 2 is fixedly installed at the bottom of the upper structure of the bridge to stably support the limiting component and the energy-consuming component. It includes: a second support plate 21 and a second ear plate 22.

[0046] The second support plate 21 is fixedly connected to the bottom end of the bridge superstructure by fastening bolts to provide sufficient support;

[0047] Preferably, the second support plate 21 is an L-shaped support plate with ribs fixed on its inner side, and its upper end on one side is connected to the superstructure of the bridge.

[0048] One end of the second ear plate 22 is fixedly disposed on one side of the second support plate 21, and the other end is fixedly provided with a through hole for stably connecting the limiting component and the energy-consuming component;

[0049] Preferably, the second ear plate 22 is a U-shaped plate, and the through hole is located at the center of one semi-circular end to improve the stability of the second connector 2;

[0050] Preferably, there are at least two second ear plates 22, and several second ear plates 22 are parallel to each other;

[0051] Specifically, such as Figures 1 to 3 , Figure 5 As shown, the limiting component is connected to the first connector 1 and the second connector 2 respectively, and is used to provide ultimate bearing capacity, thereby preventing the bridge superstructure from falling off. It includes: a first pin 31, a second pin 32 and a rigging 4.

[0052] The first pin 31 passes through the first joint bearing 121, the rigging 4, and the energy-consuming component.

[0053] The second pin 32 passes through the second ear plate 22, the rigging 4 and the energy-consuming component respectively.

[0054] Preferably, one end of the first pin 31 and the second pin 32 are provided with a pin head, and the other end is provided with a safety device including a safety pin or a lock, so that the rigging 4 and the second ear plate 22 do not fall off during use, thereby improving the safety of the anti-fall beam device.

[0055] The two ends of the rigging 4 are respectively sleeved on the outside of the first pin 31 and the second pin 32, and the rigging 4 is located on the outside of the damping component 5.

[0056] Preferably, the rigging 4 is mainly made of rust-proof metal parts.

[0057] Preferably, the rigging 4 includes components such as chains and wire ropes.

[0058] In an optional embodiment, the rigging 4 is a steel wire rope, with both ends of the steel wire rope tightly fitted onto the outside of the first pin 31 and the second pin 32 respectively by steel wire rope clamps. This is to ensure that the steel wire rope does not come off the first pin 31 under vibration, thereby improving assembly safety. At the same time, the contact area between the steel wire rope and the first pin 31 and the second pin 32 is provided with rubber material to improve the durability of the device and extend its service life.

[0059] Specifically, such as Figures 1 to 5 As shown, the energy-dissipating component is connected to the first connector 1 and the second connector 2 respectively, and is used to dissipate seismic vibration energy and attenuate the bridge vibration response. It includes a damping component 5.

[0060] The damping component 5 is connected to the first connector 1 and the second connector 2 at both ends via the first pin 31 and the second pin 32, respectively, and includes: a rotating plate 51 and a connecting assembly 52;

[0061] One end of each of the three rotating plates 51 is connected by the connecting assembly 52. ​​Meanwhile, the other end of the middle rotating plate 51 is connected to the second ear plate 22 by the second pin 32 and is located between the two second ear plates 22. The other ends of the front and rear rotating plates 51 are connected to the first ear plate 12 by the first pin 31 and are respectively located between the first ear plate 12 and the rigging 4.

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

[0063] Preferably, a second joint bearing 511 is provided at one end of the through hole of the rotating plate 51 in the middle. The second joint bearing 511 is adapted to the second pin 32 to further improve the adaptability of the anti-fall beam device to the angular deformation caused by bridge vibration and improve the service life of the anti-fall beam device.

[0064] The connecting assembly 52 includes: a gasket 521, a disc spring 522, a friction ring 523, and a preload bolt 524;

[0065] Preferably, the middle of the gasket 521, the disc spring 522 and the friction ring 523 are all fixedly provided with through holes that are compatible with the pre-tightening bolt 524;

[0066] The gasket 521 is in close contact with the disc spring 522. The two sets of gaskets 521 and disc springs 522 are mirror-symmetrical and respectively located on the outer side of the front rotating plate 51 and the rear rotating plate 51, so as to evenly apply the pre-tightening force of the pre-tightening bolt 524 to several rotating plates 51.

[0067] The two friction rings 523 are respectively disposed between the three rotating plates 51;

[0068] Preferably, the rotating plate 51 and the friction ring 523 have the same thickness.

[0069] The pre-tightening bolt 524 passes through the three rotating plates 51, the two washers 521, the two disc springs 522 and the two friction rings 523, so that the connecting assembly 52 is tightly connected to the three rotating plates 51.

[0070] Preferably, the pre-tightening bolt 524 is a non-contact ultrasonic axial force measuring bolt, which is used to provide real-time feedback on its working performance and can provide a scientific basis for the maintenance of the friction damper.

[0071] Preferably, the length of the rigging 4 is such that during non-earthquake periods or small to medium-magnitude earthquakes, the rigging 4 is in a slack state and is always above the connecting component 52, preventing the rigging 4 from getting tangled with the damping component 5. At the same time, in the event of a large-magnitude earthquake, the front and rear rotating plates 51 and the middle rotating plate 51 reach their maximum angle with the connecting component 52 as the vertex, and the rigging 4 changes from a slack state to a taut state at its limit. At this time, the limiting component provides the ultimate bearing capacity.

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

[0073] like Figure 6 As shown, another embodiment of the present invention provides a method for using a hybrid anti-falling beam device, comprising the following steps:

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

[0075] S2: The first connector 1 and the second connector 2 are respectively placed at appropriate positions on the bridge pier and the upper structure of the bridge. Then, the rigging 4 and the energy-consuming component are connected to the first connector 1 and the second connector 2 through the first pin 31 and the second pin 32, thus completing the installation of the anti-falling beam device.

[0076] S3: During the service of the anti-falling beam device, when encountering a small or medium level earthquake, the first connecting member 1 and the second connecting member 2 move relative to each other, causing the front and rear rotating plates 51 and the middle rotating plate 51 to rotate relative to the connecting assembly 52, thereby reducing the bridge vibration response.

[0077] S4: When encountering a large-scale earthquake, the rotating plates 51 on the front and rear sides and the rotating plate 51 in the middle reach the maximum angle with the connecting component 52 as the vertex. The rigging 4 connecting the first pin 31 and the second pin 32 respectively changes from a slack state to a taut state at the limit state, and the limiting component provides the ultimate bearing capacity.

[0078] S5: During the service life of the anti-falling beam device, the anti-falling beam device is monitored in real time through the pre-tightening bolt 524 in the connecting assembly 52, reducing the difficulty of maintenance.

[0079] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0080] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0081] In this patent, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit it; those skilled in the art will readily understand that the above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hybrid anti-falling beam device, characterized in that: include: A first connecting member (1), a second connecting member (2), a limiting component and an energy-consuming component, wherein: The first connecting member (1) comprises: a first supporting plate (11) and a first ear plate (12); the first supporting plate (11) is fixedly connected to the bridge pier by means of fastening bolts; one end of the first ear plate (12) is fixedly arranged on one side of the first supporting plate (11), and the other end is fixedly provided with a first joint bearing (121); The second connecting member (2) comprises: a second supporting plate (21) and a second ear plate (22); the second supporting plate (21) is fixedly connected to the bottom end of the bridge superstructure by fastening bolts; one end of the second ear plate (22) is fixedly arranged on one side of the second supporting plate (21), and the other end is fixedly provided with a through hole; The limiting component comprises: a first latch (31), a second latch (32) and a rigging (4); The first latch (31) passes through the first joint bearing (121), the rigging (4) and the energy-consuming component respectively; the second latch (32) passes through the second ear plate (22), the rigging (4) and the energy-consuming component respectively; two ends of the rigging (4) are respectively sleeved on the outside of the first latch (31) and the second latch (32); The energy-absorbing component comprises: a damping component (5); two ends of the damping component (5) are respectively connected to the first connecting member (1) and the second connecting member (2) via the first latch (31) and the second latch (32); the friction damping force inside the damping component (5) dissipates the seismic vibration energy, and the limiting component provides an ultimate bearing capacity, thereby further realizing the function of preventing the beam from falling.

2. The anti-falling beam device according to claim 1, characterized in that: The damping component (5) comprises: a rotating plate (51) and a connecting assembly (52); one end of the three rotating plates (51) are connected via the connecting assembly (52); at the same time, the other end of the rotating plate (51) in the middle is connected to the second ear plate (22) via the second latch (32) and is arranged between the two second ear plates (22); the other ends of the rotating plates (51) at the front and rear sides are connected to the first ear plate (12) via the first latch (31) and are respectively arranged between the first ear plate (12) and the rigging (4).

3. The anti-falling beam device according to claim 2, characterized in that: The rotating plate (51) is a rotating plate with semicircular ends and a rectangular plate in the middle, and through holes for connection are provided at the centers of the two semicircular ends.

4. The beam-falling prevention device according to claim 3, characterized in that: A through hole at one end of the rotating plate (51) in the middle is provided with a second joint bearing (511), and the second joint bearing (511) is adapted to the second latch pin (32).

5. The beam-falling prevention device according to claim 2, characterized in that: 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) and the disc spring (522) are tightly fitted, and two groups of the gasket (521) and the disc spring (522) are mirror-symmetrical and are respectively arranged on the outer sides of the front rotating plate (51) and the rear rotating plate (51); the two friction rings (523) are respectively arranged between the three rotating plates (51); the gasket (521) and the disc spring (522) are tightly fitted with each other, and the two groups of the gasket (521) and the disc spring (522) are mirror-symmetrical and are respectively arranged on the outer sides of the front rotating plate (51) and the rear rotating plate (51). 521), the disc spring (522) and the friction ring (523) are all fixedly provided with a through hole adapted to the pre-tightening bolt (524) in the middle; the pre-tightening bolt (524) passes 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) is tightly connected to the three rotating plates (51); the pre-tightening bolt (524) is a contactless ultrasonic axial force measuring bolt.

6. The beam-falling prevention device according to any one of claims 1 to 5, characterized in that: The rigging (4) is mainly made of rust-proof metal parts.

7. The beam-falling prevention device according to claim 6, characterized in that: The rigging (4) comprises a steel wire rope, the two ends of which are respectively tightly sleeved on the outside of the first latch (31) and the second latch (32) through a steel wire rope clamp, and a rubber material is provided in the contact area between the steel wire rope and the first latch (31) and the second latch (32).

8. The beam-falling prevention device according to any one of claims 1 to 5, characterized in that: The first ear plate (12) is a U-shaped plate, and the first joint bearing (121) is arranged at the center of a semicircular end of one end thereof; there is at least one first ear plate (12).

9. The beam-falling prevention device according to any one of claims 1 to 5, characterized in that: The second ear plate (22) is a U-shaped plate, and the through hole is arranged at the center of a semicircular end of one end thereof; there are at least two second ear plates (22), and a plurality of the second ear plates (22) are parallel to each other.

10. A method for using a hybrid anti-falling beam device, which is implemented by using the anti-falling beam device according to any one of claims 1 to 9, characterized in that: The steps include: S1: Check the structural stability of the first connecting member (1), the second connecting member (2), the limiting component and the energy-consuming component to ensure that they can be installed and used normally; S2: The first connecting member (1) and the second connecting member (2) are respectively arranged at appropriate positions of the bridge pier and the bridge superstructure, and then the rigging (4) and the energy-absorbing component are respectively connected to the first connecting member (1) and the second connecting member (2) through the first latch (31) and the second latch (32), thereby completing the installation of the anti-falling beam device; S3: During the service life of the anti-falling beam device, when encountering a small or medium earthquake, the first connecting member (1) and the second connecting member (2) move relative to each other, so that the rotating plates (51) at the front and rear sides and the rotating plate (51) at the middle rotate relative to the connecting assembly (52), thereby reducing the vibration response of the bridge; S4: When encountering a large earthquake, the rotation plates (51) at the front and rear sides and the rotation plates (51) at the middle reach a maximum angle with the connection assembly (52) as the vertex, and the rigging (4) respectively connecting the first latch (31) and the second latch (32) changes from a relaxed state to a tense state, which is an extreme state, and the limiting component provides an ultimate bearing capacity; S5: During the service life of the anti-beam-dropping device, the anti-beam-dropping device is monitored in real time through the pre-tightening bolts (524) in the connecting assembly (52), thereby reducing the difficulty of maintenance.

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