Recoverable anti-falling beam device

Abstract

The present invention discloses a recoverable anti-falling beam device, comprising: an anti-falling beam unit, which includes a first steel plate, a bottom steel plate, and a second steel plate that are integrally formed in a U-shaped structure; an elastoplastic deformation unit, which includes a third steel plate, a steel plate-rubber cylindrical core, and a fourth steel plate that are integrally formed; a friction energy dissipation unit, which includes an outer steel sleeve and an inner steel sleeve that are sleeved on the steel plate-rubber cylindrical core and connected by a rolling bearing; and a displacement recovery unit, which includes at least one elastic member. The present invention can provide reliable lateral restraint for the upper structure, prevent excessive lateral displacement of the beam body, and consume the seismic force of the upper structure through its own energy dissipation to avoid large lateral forces on the lower structure.

Description

Technical Field

[0001] The present invention relates to the technical field of disaster prevention and shock absorption for engineering structures. More specifically, the present invention relates to a recoverable anti-falling beam device. Background Art

[0002] In actual earthquakes, the beam body may suffer from the shock damage of falling beams due to excessive displacement. The reason for the occurrence of falling beams is the lack of a safe and reliable lateral falling beam limiting device, resulting in weak lateral seismic resistance of the beam body under earthquake action, thus causing shock damages such as falling beams. Therefore, the anti-falling beam device is the most direct, scientific and effective way to control the falling beam installed on the bridge structure. At present, there are not many systematic studies on falling beam control in China, and the research and practical application of related devices are still in the initial stage. The existing anti-falling beam devices either have an insignificant effect and are形同虚设 (useless in form), or have too large a stiffness, so that the seismic force transmitted from the upper structure to the lower structure is too large, thus aggravating the damage of the lower structure. Summary of the Invention

[0003] One object of the present invention is to solve at least the above problems and provide at least the advantages described hereinafter.

[0004] Another object of the present invention is to provide a recoverable anti-falling beam device, which can provide a reliable lateral constraint for the upper structure, prevent excessive lateral displacement of the beam body, and can also consume the seismic force of the upper structure through its own energy dissipation to avoid large lateral forces acting on the lower structure.

[0005] To achieve these objects and other advantages according to the present invention, there is provided a recoverable anti-falling beam device, comprising:

[0006] An anti-falling beam unit, which includes a first steel plate, a bottom steel plate, and a second steel plate integrally formed into a U-shaped structure. The bottom steel plate is fixedly connected to the structure, and the first steel plate or the second steel plate forms an obstacle surface for the main beam;

[0007] An elastoplastic deformation unit, which includes a third steel plate, a steel plate-rubber cylindrical core, and a fourth steel plate integrally formed. The third steel plate and the fourth steel plate are respectively fixedly connected to the first steel plate and the second steel plate;

[0008] A friction energy dissipation unit, which includes an outer steel sleeve and an inner steel sleeve sleeved on the steel plate-rubber cylindrical core and slidably connected through a rolling bearing. One end of the outer steel sleeve is fixedly connected to the third steel plate, and the other end of the inner steel sleeve is fixedly connected to the fourth steel plate. The length of the outer steel sleeve is greater than the length of the inner steel sleeve, and the outer steel sleeve and the inner steel sleeve are axially staggered by a certain distance. The length of the outer steel sleeve is greater than half of the distance between the third steel plate and the fourth steel plate;

[0009] The displacement recovery unit comprises at least one elastic component, and two sides of the elastic component are respectively fixedly connected to the outer steel sleeve and the fourth steel plate.

[0010] Preferably, the structure is a cap beam.

[0011] Preferably, a plurality of stiffening ribs are provided at the connection between the first steel plate and the bottom steel plate, and at the connection between the bottom steel plate and the second steel plate.

[0012] Preferably, the first steel plate, the bottom steel plate, the second steel plate, the third steel plate and the fourth steel plate are all provided with anchor points.

[0013] Preferably, the outer steel sleeve and the third steel plate, the inner steel sleeve and the fourth steel plate are welded, and both sides of the elastic component are welded to the outer steel sleeve and the fourth steel plate.

[0014] Preferably, the elastic member is a disc spring, and there are multiple disc springs evenly distributed on the periphery of the steel plate-rubber cylindrical core.

[0015] The present invention has at least the following beneficial effects:

[0016] First, the present invention provides reliable lateral constraints for the upper structure to prevent excessive lateral displacement of the beam body, and can consume the seismic force of the upper structure through its own energy consumption to avoid the lower structure from being subjected to large lateral forces, thereby achieving the effect of preventing the beam from falling and being able to recover, preventing the bridge main beam from excessive lateral displacement or even falling under the action of horizontal earthquakes, and allowing the main beam to recover part of the horizontal displacement after the earthquake, while consuming part of the horizontal earthquake energy, reducing the horizontal inertia force transmitted from the bridge upper structure to the lower structure, and improving the bridge's ability to resist horizontal earthquakes;

[0017] Second, the beam fall prevention unit includes a U-shaped first steel plate, a bottom steel plate, and a second steel plate, which can be made of stainless steel plate. The bottom steel plate forms the installation part of the structure. Either the first steel plate or the second steel plate can be installed on the inner side close to the main beam. The elastoplastic deformation unit includes a third steel plate, a steel plate-rubber cylindrical core, and a fourth steel plate. The third steel plate and the fourth steel plate are cooperatively installed on the first steel plate and the second steel plate, and can be made of stainless steel plate. The steel plate-rubber cylindrical core can be made by hot extrusion with the staggered combination of stiffening steel plates and rubber. The friction energy dissipation unit includes an outer steel sleeve and an inner steel sleeve, which can be made of stainless steel plate. A chute is arranged between the outer steel sleeve and the inner steel sleeve, and balls are arranged in the chute. The outer steel sleeve and the inner steel sleeve can move axially relative to each other. The length of the outer steel sleeve is greater than that of the inner steel sleeve. One end of the inner side of the outer steel sleeve is fixed to the third steel plate, and one end of the outer side of the inner steel sleeve is fixed to the fourth steel plate. A certain gap is formed between the inner steel sleeve and the third steel plate, and there is a certain space to generate friction energy dissipation. A horizontal displacement space is formed at one end of the outer side of the outer steel sleeve and the fourth steel plate. The displacement recovery unit is installed in the horizontal displacement space. The outer steel sleeve and the third steel plate, and the inner steel sleeve and the fourth steel plate are both fixedly connected, which can be welding or integrally formed. The elastic members are fixedly connected to the outer steel sleeve and the fourth steel plate respectively, which can be welding or riveting. One or more elastic members can be selected, as long as a certain rebounding force can be formed when under pressure, such as springs, elastic sheets, rubber columns, etc. One end of the inner side of the elastic member is fixedly connected to the outer side of the outer steel sleeve, and the elastic member forms an obstruction to the outer steel sleeve, ensuring that there is a certain space for the outer steel sleeve to generate friction energy dissipation under horizontal seismic action. One end of the outer side of the elastic member is fixedly connected to the fourth steel plate. The gap between the inner steel sleeve and the third steel plate is greater than the horizontal displacement space, that is, the gap between the outer steel sleeve and the fourth steel plate, ensuring that when the outer steel sleeve compresses the elastic member, the third steel plate will not contact the inner steel sleeve, thereby ensuring that there is enough space to generate friction energy dissipation under horizontal seismic action;

[0018] Third, when an earthquake occurs, the bridge main beam moves transversely under the action of a horizontal earthquake, and the first steel plate or the second steel plate moves transversely with the main beam, thereby squeezing the third steel plate or the fourth steel plate. The steel plate-rubber cylindrical core has a certain horizontal stiffness, which can resist horizontal resistance. At the same time, the steel plate-rubber cylindrical core has restorability. At the same time, when the outer steel sleeve compresses the elastic member, there is a certain friction coefficient between the contact surface of the ball and the outer steel sleeve. The outer steel sleeve and the ball slide relative to each other horizontally and generate a certain friction force, which consumes part of the horizontal earthquake energy, thereby reducing the horizontal inertia force transmitted to the lower structure of the bridge by the bridge main beam through the present invention, and achieving the effect of shock absorption. The outer steel sleeve squeezes the elastic member, so that the elastic member stores energy. After the earthquake, the steel plate-rubber cylindrical core can provide a certain deformation recovery, so that the main beam recovers a certain horizontal displacement. The elastic member releases the stored energy, thereby pushing the outer steel sleeve or the fourth steel plate, and then pushing the first steel plate or the second steel plate, and finally pushing the bridge main beam, so that the bridge main beam recovers part of the horizontal displacement generated in the earthquake, and the main beam is reset;

[0019] Fourth, the structure is a cap beam, which is installed on the outermost side of the top surface of the cap beam and anchored to the top surface of the cap beam through the bottom steel plate. The first steel plate or the second steel plate maintains a certain distance from the main beam, and the distance is determined by the user according to actual use needs. In this way, when the main beam is laterally displaced under the action of an earthquake, the main beam is blocked to prevent it from falling and a part of the energy is consumed. After the stiffening ribs are set, the anti-falling beam unit is formed in one piece by the first steel plate, the second steel plate, the bottom steel plate, and the stiffening ribs, which ensures the local stability of the component and transmits concentrated force, thereby improving stability and torsional resistance. The first steel plate, the bottom steel plate, the second steel plate, the third steel plate, and the fourth steel plate are provided with anchor points and connected by anchor bolts, which are convenient for quick loading and unloading. When a part is damaged under the action of a horizontal earthquake, it can be replaced, thereby achieving the purpose of quick repair and economy. The external The first steel sleeve and the third steel plate, the inner steel sleeve and the fourth steel plate are all welded, and the two sides of the elastic component and the outer steel sleeve and the fourth steel plate are all welded. They are assembled and constructed on site, which is convenient for transportation and factory prefabrication. The elastic component adopts disc springs, which can withstand extremely large loads in a smaller space and can resist larger horizontal earthquake loads. Multiple disc springs are evenly and symmetrically distributed, which is convenient for releasing the energy stored by being squeezed under horizontal earthquakes. The gap between the inner steel sleeve and the third steel plate is larger than the horizontal displacement space, so as to ensure that there is a certain space for the friction energy dissipation unit to generate friction energy under the action of horizontal earthquakes. At the same time, after the action of horizontal earthquakes, the friction energy dissipation unit, the anti-drop beam unit, and the main beam of the bridge can restore the horizontal displacement to the maximum extent, thereby restoring to the original position in the horizontal direction to the maximum extent.

[0020] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. Brief Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a technical solution of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the anti-falling beam unit of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the elastoplastic deformation unit of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the friction energy dissipation unit of the present invention. Detailed Embodiment

[0025] The following further describes the present invention in detail with reference to the drawings, so that those skilled in the art can implement it according to the description in the specification.

[0026] It should be understood that the terms such as "having", "comprising" and "including" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0027] It should be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "set" should be understood in a broad sense. For example, they can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The orientation or positional relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0028] As Figure 1-3 shown, the present invention provides a recoverable anti-falling beam device, including:

[0029] An anti-falling beam unit 1, which includes a first steel plate 5, a bottom steel plate 7, and a second steel plate 6 with a U-shaped structure integrally formed. The bottom steel plate 7 is fixedly connected to the structure, and the first steel plate 5 or the second steel plate 6 forms an obstacle surface for the main beam;

[0030] The elastic-plastic deformation unit 2 includes an integrally formed third steel plate 11, a steel plate-rubber cylindrical core 13, and a fourth steel plate 12, wherein the third steel plate 11 and the fourth steel plate 12 are fixedly connected to the first steel plate 5 and the second steel plate 6 respectively;

[0031] The friction energy dissipation unit 3 comprises an outer steel sleeve 14 and an inner steel sleeve 17 which are sleeved on the steel plate-rubber cylindrical core 13 and slidably connected via a rolling bearing, one end of the outer steel sleeve 14 is fixedly connected to the third steel plate 11, the other end of the inner steel sleeve 17 is fixedly connected to the fourth steel plate 12, the length of the outer steel sleeve 14 is greater than the length of the inner steel sleeve 17, and the outer steel sleeve 14 and the inner steel sleeve 17 are axially staggered by a certain distance, the length of the outer steel sleeve 14 is greater than half of the spacing between the third steel plate 11 and the fourth steel plate 12, and one end of the outer steel sleeve 14 is fixedly connected to the third steel plate 11;

[0032] The displacement recovery unit 4 includes at least one elastic component, and two sides of the elastic component are fixedly connected to the outer steel sleeve 14 and the fourth steel plate 12 respectively.

[0033] In the above technical scheme, the present invention can provide reliable lateral constraints for the upper structure to prevent excessive lateral displacement of the beam body, and can also consume the seismic force of the upper structure through its own energy consumption to avoid the lower structure being subjected to a large lateral force, thereby achieving the effect of preventing the beam from falling and being restorable.

[0034] The anti-falling beam unit 1 includes a U-shaped first steel plate 5, a bottom steel plate 7, and a second steel plate 6, which can be made of stainless steel plate. The bottom steel plate 7 forms the installation part of the structure. Either the first steel plate 5 or the second steel plate 6 can be installed on the inner side close to the main beam. The elastoplastic deformation unit 2 includes a third steel plate 11, a steel plate-rubber cylindrical core 13, and a fourth steel plate 12. The third steel plate 11 and the fourth steel plate 12 are cooperatively installed on the first steel plate 5 and the second steel plate 6, which can be made of stainless steel plate. The steel plate-rubber cylindrical core 13 can be made by hot extrusion with alternating stiffening steel plates and rubber. The friction energy dissipation unit 3 includes an outer steel sleeve 14 and an inner steel sleeve 17, which can be made of stainless steel plate. A chute 15 is provided between the outer steel sleeve 14 and the inner steel sleeve 17, and balls 16 are arranged in the chute 15. The outer steel sleeve 14 and the inner steel sleeve 17 can move axially relative to each other. The length of the outer steel sleeve 14 is greater than that of the inner steel sleeve 17. The inner end of the outer side of the outer steel sleeve 14 is fixed to the third steel plate 11, and the outer end of the outer side of the inner steel sleeve 17 is fixed to the fourth steel plate 12. A certain gap is formed between the inner steel sleeve 17 and the third steel plate 11, and there is a certain space to generate friction energy dissipation. A horizontal displacement space is formed between the outer end of the outer side of the outer steel sleeve 14 and the fourth steel plate 12. The displacement recovery unit 4 is installed in the horizontal displacement space. The outer steel sleeve 14 and the third steel plate 11, and the inner steel sleeve 17 and the fourth steel plate 12 are both fixedly connected, which can be welded or integrally formed. The elastic members are fixedly connected to the outer steel sleeve 14 and the fourth steel plate 12 respectively, which can be welded or riveted. One or more elastic members can be selected, and a certain rebounding force can be formed when under pressure, such as springs, elastic sheets, rubber columns, etc. The inner end of the elastic member is fixedly connected to the outer end of the outer side of the outer steel sleeve 14, and the elastic member forms an obstruction to the outer steel sleeve 14, ensuring that there is a certain space for the outer steel sleeve 14 to generate friction energy dissipation under horizontal seismic action. The outer end of the elastic member is fixedly connected to the fourth steel plate 12. The gap between the inner steel sleeve 17 and the third steel plate 11 is greater than the horizontal displacement space, that is, the gap between the outer steel sleeve 14 and the fourth steel plate 12, ensuring that the third steel plate 11 will not contact the inner steel sleeve 17 when the outer steel sleeve 14 compresses the elastic member, so as to ensure that there is enough space to generate friction energy dissipation under horizontal seismic action.

[0035] When an earthquake occurs, the main beam of the bridge moves transversely under the action of a horizontal earthquake. The first steel plate 5 or the second steel plate 6 moves transversely with the main beam, thereby squeezing the third steel plate 11 or the fourth steel plate 12. The steel plate-rubber cylindrical core 13 has a certain horizontal stiffness, which can resist the horizontal resistance. At the same time, the steel plate-rubber cylindrical core 13 has restorability. At the same time, when the outer steel sleeve 14 compresses the elastic component, there is a certain friction coefficient between the contact surface of the ball 16 and the outer steel sleeve 14. The outer steel sleeve 14 and the ball 16 slide horizontally relative to each other and generate a certain friction force, which consumes part of the water. The horizontal inertia force transmitted from the main beam of the bridge to the lower structure of the bridge by the present invention is reduced to achieve the effect of shock absorption. The outer steel sleeve 14 squeezes the elastic component so that the elastic component stores energy. After the earthquake, the steel plate-rubber cylindrical core 13 can provide a certain deformation recovery to restore the main beam to a certain horizontal displacement. The elastic component releases the stored energy, thereby pushing the outer steel sleeve 14 or the fourth steel plate 12, and then pushing the first steel plate 5 or the second steel plate 6, and finally pushing the main beam of the bridge, so that the main beam of the bridge recovers part of the horizontal displacement generated in the earthquake, thereby achieving the main beam reset.

[0036] In another technical solution, the structure is a cap beam. The present invention is installed on the outermost side of the top surface of the cap beam, and is anchored to the top surface of the cap beam through the bottom steel plate 7. The first steel plate 5 or the second steel plate 6 maintains a certain distance from the main beam, and the distance is determined by the user according to actual use requirements. In this way, when the main beam is laterally displaced under the action of an earthquake, the main beam is blocked to prevent it from falling, and part of the energy is consumed.

[0037] In another technical solution, a plurality of stiffening ribs 8 are provided at the connection between the first steel plate 5 and the bottom steel plate 7, and at the connection between the bottom steel plate 7 and the second steel plate 6. After the stiffening ribs 8 are provided, the anti-drop beam unit is formed integrally by the first steel plate 5, the second steel plate 6, the bottom steel plate 7, and the stiffening ribs 8, so as to ensure the local stability of the component and transmit the concentrated force, thereby improving the stability and torsional resistance.

[0038] In another technical solution, the first steel plate 5, the bottom steel plate 7, the second steel plate 6, the third steel plate 11, and the fourth steel plate 12 are all provided with anchor points 9 or 10. The first steel plate 5, the second steel plate 6, the third steel plate 11, and the fourth steel plate 12 are provided with anchor points 10, and the bottom steel plate 7 is provided with a structure anchor point 9, which is connected by anchor bolts, is convenient for rapid loading and unloading, and can be replaced when a part is damaged under the action of a horizontal earthquake, so as to achieve the purpose of rapid repair and economy.

[0039] In another technical solution, the outer steel sleeve 14 and the third steel plate 11, the inner steel sleeve 17 and the fourth steel plate 12 are welded, and both sides of the elastic member are welded to the outer steel sleeve 14 and the fourth steel plate 12. On-site assembly and construction are convenient for transportation and factory prefabrication.

[0040] In another technical solution, the elastic member is a disc spring, and the number of disc springs is multiple, which are evenly distributed on the outer periphery of the steel plate-rubber cylindrical core 13. The elastic member adopts a disc spring, which can withstand a very large load in a small space and can resist a large earthquake horizontal load. Multiple disc springs are evenly and symmetrically distributed, which is convenient for releasing the energy stored by being squeezed under horizontal earthquakes. The gap between the inner steel sleeve 17 and the third steel plate 11 is larger than the horizontal displacement space, so as to ensure that there is a certain space for the friction energy dissipation unit 3 to generate friction energy under the action of horizontal earthquakes. At the same time, after the horizontal earthquake, the friction energy dissipation unit 3, the anti-falling beam unit, and the bridge main beam will maximize the recovery of horizontal displacement, thereby maximally restoring to the original position in the horizontal direction.

[0041] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0042] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. The recoverable anti-falling beam device is characterized by: Comprising: A beam-drop prevention unit, which includes a first steel plate, a bottom steel plate, and a second steel plate that are integrally formed into a U-shaped structure. The bottom steel plate is fixedly connected to the structure, and the first steel plate or the second steel plate forms an obstacle surface for the main beam; An elastoplastic deformation unit, which includes a third steel plate, a steel plate-rubber cylindrical core, and a fourth steel plate that are integrally formed. The third steel plate and the fourth steel plate are respectively fixedly connected to the first steel plate and the second steel plate; A friction energy dissipation unit, which includes an outer steel sleeve and an inner steel sleeve that are sleeved on the steel plate-rubber cylindrical core and are slidably connected through a rolling bearing. One end of the outer steel sleeve is fixedly connected to the third steel plate, and the other end of the inner steel sleeve is fixedly connected to the fourth steel plate. The length of the outer steel sleeve is greater than the length of the inner steel sleeve, and the outer steel sleeve and the inner steel sleeve are axially staggered by a certain distance. The length of the outer steel sleeve is greater than half of the distance between the third steel plate and the fourth steel plate; A displacement recovery unit, which includes at least one elastic member. Both sides of the elastic member are respectively fixedly connected to the outer steel sleeve and the fourth steel plate.

2. The recoverable anti-falling beam device according to claim 1, characterized in that: The structure is a capping beam.

3. The recoverable anti-falling beam device according to claim 1, characterized in that: A plurality of stiffening ribs are provided at the connection between the first steel plate and the bottom steel plate and at the connection between the bottom steel plate and the second steel plate.

4. The recoverable anti-falling beam device according to claim 1, characterized in that: Anchoring points are provided on the first steel plate, the bottom steel plate, the second steel plate, the third steel plate, and the fourth steel plate.

5. The recoverable anti-falling beam device according to claim 1, characterized in that: The outer steel sleeve and the third steel plate, and the inner steel sleeve and the fourth steel plate are both welded. Both sides of the elastic member and the outer steel sleeve and the fourth steel plate are both welded.

6. The recoverable anti-falling beam device according to claim 1, characterized in that: The elastic member is a disc spring, and the number of disc springs is multiple, which are evenly distributed on the outer periphery of the steel plate-rubber cylindrical core.

Images