Tenon-shaped anti-falling beam device
By designing a tenon-shaped anti-fall beam device with groove fit, the existing device is easily fatigued and broken under the action of large external forces, achieving higher energy consumption and seismic resistance.
Patent Information
- Application Number
- CN202510264271.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-05-27
AI Technical Summary
When the existing tenon-shaped anti-fall beam device is subjected to greater external forces, it is prone to fatigue and fracture due to excessive internal stress, resulting in failure of the anti-fall beam device.
A tenon-shaped anti-fall beam device including a first tenon body, a second tenon body and a connecting member is designed. The first and second tenon bodies achieve invisible deformation in the absence of earthquakes and small earthquakes, and elastic and plastic deformation in the case of medium earthquakes and large earthquakes through cooperation with the grooves to absorb seismic energy.
The damping energy consumption capacity is provided through the elastic and plastic deformation of the tenon body, which significantly improves the energy consumption capacity of the fall-off beam device, avoids fatigue and fracture, and enhances seismic resistance.
Smart Images
Figure CN120042136A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of bridge seismic resistance, and specifically provides a tenon-shaped anti-falling beam device. Background Art
[0002] Falling beam is one of the main forms of bridge earthquake damage. Under the action of an earthquake, a bridge may fall due to external forces. A falling beam accident not only causes damage to the bridge structure, but may also lead to casualties and traffic jams.
[0003] In order to improve the displacement phenomenon of the beam body when the bridge is affected by external forces such as earthquakes, in some related technologies, a tenon-shaped anti-falling beam device is provided between the pier body and the beam body of the bridge to avoid the occurrence of the falling beam phenomenon, and to achieve the effects of shock absorption and energy dissipation, and improve the seismic performance of the bridge. However, when the current tenon-shaped anti-falling beam is subjected to a large external force, fatigue fracture and other phenomena still occur due to excessive internal stress in its own structure, resulting in the failure of the anti-falling beam device.
[0004] Correspondingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention
[0005] This application aims to solve the above technical problems, that is, to solve the problem of how to improve the energy dissipation ability of the anti-falling beam device.
[0006] To this end, this application provides a tenon-shaped anti-falling beam device, which includes:
[0007] A first tenon, which includes a first main body portion and a first tenon head connected to one end of the first main body portion;
[0008] A second tenon, which includes a second main body portion and a second tenon head connected to one end of the second main body portion;
[0009] A connecting member, which has a first surface and a second surface opposite to each other. The first surface is provided with a first groove, and the second surface is provided with a second groove. The first tenon head is located in the first groove, and the second tenon head is located in the second groove;
[0010] Wherein, the first groove extends along a first direction, the second groove extends along a second direction, the first direction intersects with the second direction, the first tenon head can slide along the first direction in the first groove, and the second tenon head can slide along the second direction in the second groove.
[0011] In a technical solution of the above tenon-shaped anti-falling beam device, the first direction is perpendicular to the second direction.
[0012] In a technical solution of the above tenon-shaped anti-falling beam device, the first tenon body and the second tenon body both extend along a third direction, and the first direction and the second direction are both perpendicular to the third direction.
[0013] In a technical solution of the above tenon-shaped anti-falling beam device, the first tenon head is a sphere, and the inner wall surface of the first groove is a curved surface adapted to the sphere;
[0014] The depth of the first groove is greater than the radius of the sphere, and the opening width of the first groove is less than the diameter of the sphere to limit the displacement of the first tenon body in the third direction.
[0015] In a technical solution of the above tenon-shaped anti-falling beam device, the second tenon head is disc-shaped, and the depth of the second groove is greater than the thickness of the second tenon head so that the second tenon body can slide along the third direction in the second groove.
[0016] In a technical solution of the above tenon-shaped anti-falling beam device, a limiting portion is provided at the opening of the second groove, and the limiting portion is used to limit the second tenon body from slipping out of the second groove.
[0017] In a technical solution of the above tenon-shaped anti-falling beam device, the connecting member includes a first part and a second part which are separately arranged, the first part and the second part are detachably connected, and when the first part and the second part are buckled, the first groove and the second groove are formed.
[0018] In a technical solution of the above tenon-shaped anti-falling beam device, the anti-falling beam device is applied to a T-shaped beam.
[0019] In a technical solution of the above tenon-shaped anti-falling beam device, the anti-falling beam device further includes:
[0020] A first flange, which is fixedly connected to the end of the first main body portion away from the first tenon head, and the axis of the first main body portion has an offset distance relative to the axis of the first flange;
[0021] A second flange, which is fixedly connected to the end of the second main body portion away from the second tenon head, and the axis of the second main body portion has an offset distance relative to the axis of the second flange.
[0022] In a technical solution of the above tenon-shaped anti-falling beam device, the anti-falling beam device further includes:
[0023] A first backing plate, which is used for installation between the first flange and the beam body;
[0024] A second backing plate, which is used for installation between the second flange and the pier body.
[0025] In the case of adopting the above technical solution, under the action of an earthquake, the deformation and energy dissipation process of the tenon-shaped anti-falling beam device of the present application is divided into three stages: In the first stage, the first tenon body and the first groove, and the second tenon body and the second groove slide relatively, and at this time, the first tenon body and the second tenon body do not deform; In the second stage, the first tenon body and the second tenon body undergo elastic deformation to limit the relative displacement between the beam body and the pier body; In the third stage, on the basis of limiting the relative displacement between the pier and the beam, the plastic deformation of the first tenon body and the second tenon body provides damping energy dissipation capacity to absorb seismic energy. It can be seen that through the cooperation between the first tenon body and the first groove and the cooperation between the second tenon body and the second groove, in the case of no earthquake and small earthquake, the first tenon body and the second tenon body do not touch the ends of the first groove and the second groove in the connecting piece, and each component does not deform; In the case of medium earthquake and large earthquake, the beam body begins to have a horizontal displacement. The first tenon body and the second tenon body slide to the limit positions of the first groove and the second groove respectively, start to produce elastic deformation, and then undergo plastic deformation, realizing the limit with a buffering effect and the energy dissipation and shock absorption effect. Compared with the existing tenon-shaped anti-falling beam device, in the tenon-shaped anti-falling beam device of the present application, the tenon body enters the yield state earlier, which helps to exert its energy dissipation capacity.
[0026] On the other hand, affected by the temperature difference between seasons and day and night, the beam body will show the phenomenon of thermal expansion and contraction. Under the action of the temperature difference, the beam body will generate a small amount of deformation. In this case, the first tenon body can also displace relative to the first groove, and the second tenon body displaces relative to the second groove, thereby buffering the temperature stress. Description of the Drawings
[0027] The preferred embodiments of the present application will be described below with reference to the drawings, in which:
[0028] Figure 1 is a schematic diagram of a tenon-shaped anti-falling beam device according to an embodiment of the present application and its installation between a beam body and a pier body;
[0029] Figure 2 is Figure 1 a cross-sectional view of;
[0030] Figure 3 is a schematic diagram of a connecting piece according to an embodiment of the present application;
[0031] Figure 4 is Figure 3 a schematic diagram from another perspective (after flipping Figure 3 180°);
[0032] Figure 5 is a schematic diagram showing the internal structure of the connecting piece;
[0033] Figure 6 is a schematic diagram of the first flange of a connecting piece according to an embodiment of the present application;
[0034] Figure 7 It is a schematic diagram of the first backing plate according to an embodiment of the present application.
[0035] In the figure, the reference numerals refer to the following:
[0036] 1. First tenon; 11. First main body part; 12. First tenon head; 13. First flange; 2. Second tenon; 21. Second main body part; 22. Second tenon head; 23. Second flange; 3. Connecting piece; 31. First surface; 311. First groove; 32. Second surface; 321. Second groove; 3211. Limiting part; 51. First backing plate; 52. Second backing plate;
[0037] 100. Beam body; 200. Pier body. Specific embodiments
[0038] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present application and are not used to limit the protection scope of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.
[0039] It should be noted that in the description of the present application, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the relevant devices or components must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, ordinal numbers such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0040] In addition, it should also be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.
[0041] Refer to Figure 1 and Figure 2 , Figure 1 It is a schematic diagram of a tenon-shaped anti-falling beam device according to an embodiment of the present application and when it is installed between the beam body 100 and the pier body 200. Figure 2 is Figure 1 The sectional view of. The tenon-shaped anti-falling beam device includes a first tenon 1, a second tenon 2 and a connecting piece 3.
[0042] The first tenon 1 includes a first main body portion 11 and a first tenon head 12, and the first tenon head 12 is fixedly connected to one end of the first main body portion 11. The second tenon 2 includes a second main body portion 21 and a second tenon head 22, and the second tenon head 22 is fixedly connected to one end of the second main body portion 21. Optionally, the first tenon head 12 and the first main body portion 11 are integrally formed, and the second tenon head 22 and the second main body portion 21 are integrally formed, so as to improve the overall structural strength of the first tenon 1 and the second tenon 2.
[0043] In some implementation manners, the cross-sections of both the first main body portion 11 and the second main body portion 21 are circular, and the diameters of both the first main body portion 11 and the second main body portion 21 linearly change along their axial directions, that is, the first main body portion 11 and the second main body portion 21 are designed in a frustum shape. The first tenon head 12 is connected to the small-diameter end of the first main body portion 11, and the second tenon head 22 is connected to the small-diameter end of the second main body portion 21. The large-diameter ends of the first main body portion 11 and the second main body portion 21 are respectively used for connecting to a beam body or a pier body. In this way, the first main body portion 11 and the second main body portion 21 adopt an equal-strength design with a variable cross-section. During an earthquake, each cross-section can reach yield simultaneously and enter the plastic working state. This design can ensure that the tenon maintains a uniform stress distribution during the stress process, thereby improving its working efficiency and seismic performance.
[0044] Referring to Figure 2 、 Figure 3 and Figure 4 As shown in
[0045] When the tenon-shaped anti-falling beam device of the present application is installed between the beam body 100 and the pier body 200, both the first tenon 1 and the second tenon 2 extend along a third direction, and the first tenon 1 and the second tenon 2 are located on the same axis. The third direction is the Z direction in the figure. It can be seen that the first direction, the second direction, and the third direction are perpendicular to each other, the first direction and the second direction are horizontal directions, and the third direction is a vertical direction.
[0046] When the tenon-shaped anti-falling beam device of the present application is installed, the first tenon body 1 is fixedly connected to the beam body, and the second tenon body 2 is fixedly connected to the pier body. Moreover, it is necessary to ensure that the axes of the first tenon body 1 and the second tenon body 2 coincide. Then, the connecting member 3 is installed between the first tenon head 12 and the second tenon head 22. In this way, during the use of the bridge, when there is no vibration in the environment where the bridge is located, the first tenon body 1 and the second tenon body 2 do not undergo deformation and displacement; after the bridge is subjected to vibration, when the beam body undergoes a horizontal displacement, first, the first tenon head 12 slides relative to the first groove 311, and the second tenon head 22 slides relative to the second groove 321, so that the first tenon body 1 and the second tenon body 2 generate displacements relative to the connecting member 3 in the horizontal plane. At this time, the first tenon head 12 and the second tenon head 22 do not undergo deformation; if the bridge continues to vibrate, and the first tenon head 12 has slid to the limit position of the first groove 311 and the second tenon head 22 has slid to the limit position of the second groove 321, at this time, the first main body portion 11 and the second main body portion 21 are stressed to generate elastic deformation and then undergo plastic deformation.
[0047] Under the action of an earthquake, the deformation and energy dissipation process of the tenon-shaped anti-falling beam device of the present application is divided into three stages: In the first stage, the first tenon body and the first groove, and the second tenon body and the second groove undergo relative sliding. At this time, the first tenon body and the second tenon body do not undergo deformation; in the second stage, the first tenon body and the second tenon body undergo elastic deformation to limit the relative displacement between the beam body and the pier body; in the third stage, on the basis of limiting the relative displacement between the pier and the beam, the plastic deformation of the first tenon body and the second tenon body provides damping energy dissipation ability to absorb earthquake energy. It can be seen that through the cooperation between the first tenon body and the first groove and the cooperation between the second tenon body and the second groove of the present application, in the case of no earthquake and small earthquake, the first tenon body and the second tenon body do not touch the ends of the first groove and the second groove in the connecting member, and each component does not undergo deformation; in the case of medium earthquake and large earthquake, the beam body begins to undergo a horizontal displacement. The first tenon body and the second tenon body slide to the limit positions of the first groove and the second groove respectively, and begin to generate elastic deformation, and then undergo plastic deformation, realizing the limiting and energy dissipation and shock absorption effects with a buffering effect. Compared with the existing tenon-shaped anti-falling beam device, in the tenon-shaped anti-falling beam device of the present application, the tenon body enters the yield state earlier, which helps it to exert its energy dissipation ability.
[0048] It should be noted that the extending directions of the first groove 311 and the second groove 321 are perpendicular to each other above, in order to enable the first tenon body 1 and the second tenon body 2 to buffer the acting forces in any direction in the horizontal plane (the component force of the earthquake force in the first direction causes the first tenon body 1 to slide relative to the first groove 311, and the component force of the earthquake force in the second direction causes the second tenon body 2 to slide relative to the second groove 321). This is only a preferred solution of the present application and is not a limitation to the present application. As long as the extending directions of the first groove 311 and the second groove 321 intersect, the above effects can be achieved.
[0049] It should also be noted that the cooperation between the first tenon 1 and the first groove 311, and the cooperation between the second tenon 2 and the second groove 321 in this application can not only buffer the shock force, but also buffer the temperature stress. That is, affected by the temperature difference between seasons and day and night, the beam will show the phenomenon of thermal expansion and contraction. Under the action of the temperature difference, the beam will produce a small deformation. In this case, the first tenon 1 can also displace relative to the first groove 311, and the second tenon 2 displaces relative to the second groove 321, thereby buffering the temperature stress.
[0050] Referring to Figure 2 、 Figure 3 and Figure 4 , in an embodiment of the present application, the first tenon head 12 is a sphere, and the inner wall surface of the first groove 311 is a curved surface adapted to the sphere. Specifically, the inner wall surface of the middle section of the first groove 311 is an arc surface, and the radian of the arc surface is adapted to the radian of the outer surface of the sphere. The inner wall surfaces at both ends of the first groove 311 are spherical surfaces adapted to the sphere. In this way, the first tenon head 12 can slide along the first groove 311 and fit with the inner wall of the first groove 311 at the "limit positions" at both ends of the first groove 311. During this process, the fitting area between the first tenon head 12 and the first groove 311 can be maximized, thereby not only improving the stability of the sliding process of the first tenon head 12, but also reducing the stress concentration phenomenon at the contact positions between the first tenon head 12 and the first groove 311.
[0051] At the same time, the depth of the first groove 311 is greater than the radius of the first tenon head 12, and the opening width of the first groove 311 is less than the diameter of the first tenon head 12, so that the first groove 311 can "wrap" the first tenon head 12 and limit the displacement of the first tenon head 12 relative to the first groove 311 in the third direction.
[0052] In this way, when the above technical solution is adopted, the first tenon 1 and the connecting member 3 are relatively fixed in the third direction, so as to limit the displacement of the connecting member 3 in the third direction. At the same time, the first tenon head 12 and the first groove 311 are in spherical contact. After the bridge is subjected to a shock force, the first tenon head 12 can not only slide in the first groove 311, but also rotate relative to the first groove 311, thereby buffering the torsional force in the horizontal direction, improving the stress concentration phenomenon, and enhancing the durability of the device.
[0053] In one embodiment of the present application, the second tenon 22 is set in a disc shape, and accordingly, the second groove 321 presents a rectangular cross section in its middle section and a semicircular cross section at its two ends, so that, similarly, the second tenon 22 can rotate relative to the second groove 321 to buffer the horizontal torsion. On the other hand, the second tenon 22 is set in a disc shape, which can disperse the axial force (i.e., the force along the third direction) it receives to the surface of the disc, reduce stress concentration, and improve the durability of the device.
[0054] Furthermore, the depth of the second groove 321 is greater than the thickness of the second tenon 22. In this way, when the bridge is subjected to a vibration force in the vertical direction, the second tenon 22 can slide in the second groove 321 along the vertical direction (i.e., the third direction), thereby buffering the vibration force in the vertical direction and preventing the tenon-shaped anti-beam-dropping device from fatigue failure due to long-term vertical tension. In this way, the energy consumption capacity of the tenon-shaped anti-beam-dropping device can be improved, while also increasing its service life.
[0055] In order to prevent the second tenon 22 from slipping out of the second groove 321 during the vertical sliding process, a limiting portion 3211 is provided at the opening of the second groove 321. The limiting portion 3211 can be integrally formed with the connecting member 3. The limiting portion 3211 can be an annular structure or a plurality of protrusions arranged at intervals. The present application does not impose any restrictions on this, as long as the second tenon 2 can be limited from slipping downward from the second groove 321.
[0056] In some embodiments of the present application, the inner walls of the first groove 311 and the second groove 321 are paved with a friction-reducing layer, which may be a structure such as a polytetrafluoroethylene plate, and is used to reduce the friction coefficient between the first tenon 12 and the first groove 311 and the friction coefficient between the second tenon 22 and the second groove 321, so that the sliding process of the first tenon 12 and the second tenon 22 is smoother.
[0057] In some embodiments of the present application, the hardness and / or modulus of the first main body portion 11 and the second main body portion 21 are smaller than the hardness and / or modulus of the first tenon 12 and the second tenon 22. In this way, during the vibration of the beam body, the first main body portion 11 and the second main body portion 21 can produce elastic deformation and plastic deformation to consume vibration energy, while also preventing the first tenon 12 and the second tenon 22 from producing plastic deformation too early due to the force applied, thereby making them unable to slide.
[0058] In other implementations, surface treatment techniques such as laser cladding may be used to locally strengthen the surfaces of the first tenon 12 and the second tenon 22 to further enhance their ability to resist plastic deformation.
[0059] Reference Figure 5, the connecting member 3 includes a first part and a second part that are separately provided, and the first part and the second part are detachably connected (for example, in the manner shown in Figure 5 , wing plates are respectively provided on the first part and the second part, and the first part and the second part are connected by a connecting member such as a bolt passing through the wing plates). In this way, during the installation of the tenon-shaped anti-falling beam, after adjusting the relative positions of the first tenon 1 and the second tenon 2, the first part and the second part are moved towards each other and buckled. After buckling, a first groove 311 and a second groove 321 are formed to surround the first tenon head 12 and the second tenon head 22, and then the first part and the second part are fixed.
[0060] Referring to Figure 2 and Figure 6 , a first flange 13 is fixedly connected to the end of the first main body portion 11 away from the first tenon head 12, and a second flange 23 is fixedly connected to the end of the second main body portion 21 away from the second tenon head 22. The axis of the first main body portion 11 has an offset distance relative to the axis of the first flange 13, and the axis of the second main body portion 21 has an offset distance relative to the axis of the second flange 23. In some terms in the art, the first flange 13 and the second flange 23 are also referred to as "eccentric flanges".
[0061] The first flange 13 and the second flange 23 are respectively used to connect with the anchor plates on the surface of the beam body or the pier body. Due to the "eccentric" setting of the first flange 13 and the second flange 23, during the installation of the first tenon 1 and the second tenon 2, the position of the first main body portion 11 can be adjusted by rotating the first flange 13, and the position of the second main body portion 21 can be adjusted by rotating the second flange 23, so that the axes of the first main body portion 11 and the second main body portion 21 coincide, making the installation of the tenon-shaped anti-falling beam device more convenient and conducive to improving the installation efficiency.
[0062] Referring to Figure 2 and Figure 7 , the tenon-shaped anti-falling beam device of the present application further includes a first cushion plate 51 and a second cushion plate 52. The first cushion plate 51 is installed between the first flange 13 and the beam body (specifically, the anchor plate on the lower surface of the beam body), and the second cushion plate 52 is installed between the second flange 23 and the pier body (specifically, the anchor plate on the upper surface of the pier body). The first cushion plate 51, the second cushion plate 52, the first flange 13, and the second flange 23 have the same diameter. The first cushion plate 51 and the second cushion plate 52 are respectively used to adjust the positions of the first tenon 1 and the second tenon 2 in the vertical direction.
[0063] In different application scenarios, the vertical distance between the beam body and the pier body is different. Therefore, it is necessary to adjust the distance between the first tenon 12 and the second tenon 22 so that when installing the connecting piece 3, the first tenon 12 can be located in the first groove 311 and the second tenon 22 can be located in the second groove 321. Therefore, the vertical height of the first tenon 12 can be adjusted by setting a first cushion plate 51 between the first flange 13 and the beam body, and the vertical height of the second tenon 22 can be adjusted by setting a second cushion plate 52 between the second flange 23 and the pier body, so that the distance between the first tenon 12 and the second tenon 22 meets the set distance. In this way, the versatility of the tenon-shaped anti-falling beam device can be improved, and there is no need to process different models of tenon-shaped anti-falling beam devices according to different application scenarios.
[0064] It can be understood that multiple first cushion plates 51 and second cushion plates 52 can be set according to actual needs, and the specific number of the first cushion plates 51 and the second cushion plates 52 is preferably such that the above distance requirements are met.
[0065] Finally, it should be noted that compared with the existing tenon-shaped anti-falling beam device, the tenon-shaped anti-falling beam device of the present application can be applied to T-shaped beams, thereby enhancing the applicability of the tenon-shaped anti-falling beam device.
[0066] In addition, based on the separately arranged connecting piece 3 and the "eccentrically arranged" first flange 13 and second flange 23, the tenon-shaped anti-falling beam device of the present application is assembled. Compared with the existing anti-falling beam device, not only the structural composition of the tenon-shaped anti-falling beam device is simplified, but also the installation accuracy can be improved and the installation process can be simplified.
[0067] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present application.
Claims
1. A tenon-shaped anti-falling beam device, characterized in that: include: A first tenon body (1), comprising a first main body portion (11) and a first tenon (12) connected to one end of the first main body portion (11); A second tenon body (2), comprising a second main body portion (21) and a second tenon (22) connected to one end of the second main body portion (21); A connecting member (3), comprising a first surface (31) and a second surface (32) opposite to each other, wherein the first surface (31) is provided with a first groove (311), and the second surface (32) is provided with a second groove (321), the first tenon (12) is located in the first groove (311), and the second tenon (22) is located in the second groove (321); The first groove (311) extends along a first direction, the second groove (321) extends along a second direction, the first direction intersects with the second direction, the first tenon (12) can slide in the first groove (311) along the first direction, and the second tenon (22) can slide in the second groove (321) along the second direction.
2. The anti-falling beam device according to claim 1, characterized in that: The first direction is perpendicular to the second direction.
3. The anti-falling beam device according to claim 2, characterized in that: The first tenon (1) and the second tenon (2) both extend along a third direction, and the first direction and the second direction are both perpendicular to the third direction.
4. The beam-falling prevention device according to claim 3, characterized in that: The first tenon (12) is a sphere, and the inner wall surface of the first groove (311) is a curved surface adapted to the sphere; The depth of the first groove (311) is greater than the radius of the sphere, and the opening width of the first groove (311) is smaller than the diameter of the sphere, so as to limit the displacement of the first tenon (1) in the third direction.
5. The beam-falling prevention device according to claim 3, characterized in that: The second tenon (22) is disc-shaped, and the depth of the second groove (321) is greater than the thickness of the second tenon (22), so that the second tenon body (2) can slide in the second groove (321) along the third direction.
6. The beam-falling prevention device according to claim 5, characterized in that: A limiting portion (3211) is provided at the opening of the second groove (321), and the limiting portion (3211) is used to limit the second tenon (2) from slipping out of the second groove (321).
7. The beam-falling prevention device according to claim 1, characterized in that: The connecting member (3) comprises a first part and a second part which are separately arranged, the first part and the second part being detachably connected, and the first groove (311) and the second groove (321) are formed when the first part and the second part are buckled together.
8. The beam-falling prevention device according to claim 1, characterized in that: The anti-falling beam device is applied to a T-beam.
9. The beam-falling prevention device according to any one of claims 1 to 8, characterized in that: The anti-falling beam device also includes: A first flange (13) fixedly connected to an end of the first main body (11) away from the first tenon (12), wherein the axis of the first main body (11) is offset from the axis of the first flange (13); The second flange (23) is fixedly connected to the end of the second main body (21) away from the second tenon (22), and the axis of the second main body (21) is offset relative to the axis of the second flange (23).
10. The beam-falling prevention device according to claim 9, characterized in that: The anti-falling beam device also includes: A first pad (51) used for being installed between the first flange (13) and the beam body (100); A second gasket (52) is used for being installed between the second flange (23) and the pier body (200).