CN116446266A - Beam falling prevention damping device and beam falling prevention damping system - Google Patents

Abstract

The invention provides an anti-falling beam damping device and an anti-falling beam damping system. The anti-falling beam damping device includes a first support, a second support, an inertial damping assembly and a cable, the first The support is suitable for connecting with the bridge; the second support is suitable for connecting with the pier; the inertial damping assembly is arranged horizontally, one end is connected with the first support, and the other end is connected with the second support; one end of the cable is connected with the first support The base is connected, and the other end is connected with the second support. The anti-falling beam damping system provided by the present invention comprises the above-mentioned anti-falling beam damping device and shock-isolation bearing, and the anti-falling beam damping device is respectively connected with the bridge and the bridge pier; the shock-isolation bearing is arranged between the bridge and the bridge pier, The upper and lower ends are respectively connected with the bridge and the pier.

Description

Anti-fall beam damping device and anti-fall beam damping system

technical field

The invention belongs to the technical field of bridge damping, and in particular relates to an anti-falling beam damping device and an anti-falling beam damping system.

Background technique

Shock absorption and isolation technology has been proved to be an effective way to improve the seismic safety of bridge structures. However, conventional shock absorption and isolation devices cannot effectively prevent bridges from falling beam damage under cross/near-fault earthquakes. Multiple earthquake damages have shown that the fault area is prone to earthquake damage such as falling beams, sliding bearings, damage to blocks and expansion joints.

Under the action of cross/near-fault earthquakes, on the one hand, non-uniform ground permanent displacements on both sides of the rupture zone and long-period velocity pulses of cross-/near-fault earthquakes require shock-absorbing and isolating devices to have outstanding displacement capabilities. On the other hand, the inertial kinetic energy and deformation energy caused by the cross/near-fault earthquake are much larger than those caused by the far-field earthquake, which requires the shock-absorbing and isolating device to have a larger energy dissipation capacity.

At present, the anti-fall beam devices mainly include cables, blocks, viscous dampers, mild steel dampers, etc. The cables and blocks improve the seismic performance of the structure through the redistribution of the internal force of the structure, but there is almost no energy dissipation effect under the action of the earthquake. The viscous damper utilizes the silicone oil in the cylinder to be squeezed at high speed to produce damping and dissipate the seismic energy, but the cost is high, the pier top layout takes up space, and the effect on controlling the relative displacement of the beam and pier is limited. Shock-absorbing tenons are widely used in mild steel dampers, which use the yield of mild steel to dissipate seismic energy, but the single tenon bears small force and requires a large number, and it needs to meet the requirements of trains for bridge stiffness under normal operation.

Therefore, it is also necessary to develop new bridge anti-drop beam technology for spanning/near-fault earthquakes to meet the requirements of large deformation and high energy consumption of spanning/near-fault bridges.

Contents of the invention

Embodiments of the present invention provide an anti-falling beam damping device and an anti-falling beam damping system, aiming to provide an anti-falling beam technology that can meet the requirements of large deformation and high energy consumption of span/near-fault bridges.

In order to achieve the above object, the technical scheme adopted in the present invention is:

In the first aspect, an embodiment of the present invention provides an anti-drop beam damping device, including:

a first support, suitable for connection with the bridge;

a second support adapted to be connected to the pier;

Inertia shock-absorbing components, arranged laterally, one end is connected to the first support, and the other end is connected to the second support;

One end of the cable is connected to the first support, and the other end is connected to the second support.

In combination with the first aspect, in a possible implementation manner of an anti-fall beam damping device provided by an embodiment of the present invention, the inertial capacity damping assembly includes a ball screw, a nut, a bushing, a flywheel, and a damping element. One end of the ball screw is connected to the first support, and the other end extends into the sleeve; the sleeve is connected to the second support; the nut is arranged on the sleeve facing the first support. One end of the seat rotates with the sleeve; the flywheel is connected with the nut and rotates with the sleeve; the damping element is arranged between the flywheel and the sleeve, and the The bushing connects and fits with the flywheel.

With reference to the first aspect, in a possible implementation manner of an anti-falling beam damping device provided by an embodiment of the present invention, the end of the ball screw away from the sleeve is provided with a first ball joint, and the sleeve The end away from the ball screw is provided with a second ball joint, the first ball joint is connected to the first support, and has a degree of freedom to rotate relative to the first support, the second ball joint is connected to the first support The second support is connected and has a degree of freedom to rotate relative to the second support.

With reference to the first aspect, in a possible implementation manner of an anti-fall beam damping device provided by an embodiment of the present invention, the first support and the second support both include a bottom plate, a mounting plate and a cover plate, so The bottom plate is used to connect with bridges or bridge piers, the mounting plate is connected to the bottom plate, the cover plate is connected to the mounting plate, and the first ball joint or the second ball joint is clamped on the mounting plate. Between the plate and the cover plate, there is a degree of freedom of rotation relative to the mounting plate and the cover plate.

With reference to the first aspect, in a possible implementation manner of an anti-falling beam damping device provided by an embodiment of the present invention, the cable is a high-strength steel cable or a memory alloy cable.

In the second aspect, an embodiment of the present invention provides an anti-drop beam damping system, which is characterized in that it includes:

The above-mentioned anti-drop beam damping device is respectively connected with the bridge and the bridge pier;

The shock-isolation support is arranged between the bridge and the bridge pier, and the upper and lower ends are respectively connected with the bridge and the bridge pier.

In combination with the second aspect, in a possible implementation of an anti-fall beam damping system provided by an embodiment of the present invention, the anti-fall beam damping device is arranged along the direction where the bridge is prone to beam fall, and is located at the The side of the bridge prone to falling beams on the seismic isolation bearing.

In combination with the second aspect, in a possible implementation of the anti-drop beam damping system provided by the embodiment of the present invention, the maximum displacement allowed by the inertial damping assembly is greater than the maximum shear allowed by the vibration isolation support. Cut deformation.

With reference to the second aspect, in a possible implementation manner of an anti-fall beam damping system provided by an embodiment of the present invention, the allowable maximum displacement of the cable is greater than the allowable maximum displacement of the inertial capacity damping assembly.

The beneficial effect of the anti-falling beam damping device provided by the present invention is: compared with the prior art, the anti-falling beam damping device provided by the present invention combines the advantages of inertial devices and cable stoppers, and can avoid bridge The structure resonates with the velocity pulse of the ground motion across/near the fault, dissipates the seismic energy, and at the same time controls the relative displacement of the beam and pier to prevent the damage of the falling beam.

The beneficial effects of the anti-fall beam damping system provided by the present invention are: compared with the prior art, the anti-fall beam damping system provided by the present invention can realize "multiple lines of defense, graded destruction". The seismic isolation bearing provides the first line of defense. The maximum displacement of the seismic isolation bearing under this defense line does not exceed the allowable shear deformation of the seismic isolation bearing; the inertial shock absorption component provides the second defense line, which consumes seismic energy during earthquake action , adjust the frequency of the structure, and provide stiffness when the isolation support exceeds the limit deformation; the cable provides the third line of defense, and plays the role of pier-beam connection after the isolation support and inertial shock absorbing components fail to achieve anti-corrosion The purpose of falling beams: through the synergistic effect of the seismic isolation support and the anti-falling beam shock absorbing device, the goal of "small, moderate earthquakes are not damaged, large earthquakes consume energy, and giant earthquakes do not fall beams" is finally achieved.

Description of drawings

Fig. 1 is a schematic cross-sectional structural view of an anti-fall beam damping device provided by an embodiment of the present invention;

Fig. 2 is a front structural schematic diagram of the anti-fall beam damping system provided by Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of the front view of the anti-fall beam damping system provided by Embodiment 2 of the present invention;

Explanation of reference signs:

11. Bottom plate; 12. Mounting plate; 13. Cover plate; 21. Ball screw;

22. Nut; 23. Sleeve; 24. Flywheel; 25. Damping element;

26. The first ball joint; 27. The second ball joint; 30. The cable; 40. The shock-isolation bearing;

51. Bridge; 52. Pier.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only a part of the embodiments of the application, not all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as any limitation of the application, its application or uses. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification. In all examples shown and discussed herein, any specific values should be construed as illustrative only, and not as limiting. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of the present application, it should be understood that orientation words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. indicate the orientation Or positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description. In the absence of a contrary statement, these orientation words do not indicate or imply the device or element referred to It must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the protection scope of the present application; the orientation words "inner and outer" refer to the inner and outer relative to the outline of each component itself.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations". Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be positioned in other different ways and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. To limit the protection scope of this application.

Please also refer to FIG. 1 , and now the anti-drop beam damping device provided by the present invention will be described. The anti-drop beam damping device includes a first support, a second support, an inertial shock absorber assembly and a drag cable 30, the first support is suitable for connecting with the bridge 51; the second support is suitable for connecting with the pier 52 Connection: The inertial shock absorbing assembly is arranged horizontally, one end is connected to the first support, and the other end is connected to the second support; one end of the cable 30 is connected to the first support, and the other end is connected to the second support.

The beneficial effect of the anti-falling beam damping device provided by the invention is: compared with the prior art, the anti-falling beam damping device provided by the present invention combines the advantages of inertial devices and dragline 30 stoppers, which can avoid The structure of the bridge 51 resonates with the speed pulse of the ground motion across/near the fault, dissipates the seismic energy, and at the same time controls the relative displacement of the beam and pier to prevent the damage of the falling beam. Purpose.

As shown in Figure 1, in a specific implementation of the anti-fall beam damping device provided by the embodiment of the present invention, the inertial capacity damping assembly includes a ball screw 21, a nut 22, a sleeve 23, a flywheel 24, and a damping element 25. One end of the ball screw 21 is connected to the first support, and the other end extends into the sleeve 23; the sleeve 23 is connected to the second support; the nut 22 is set on the end of the sleeve 23 facing the first support, and is connected with the sleeve 23 rotates and cooperates; flywheel 24 is connected with nut 22 and rotates with sleeve 23;

Specifically, the damping element 25 is a viscous damping element, which may also be replaced by a frictional damping element; wherein, the viscous damping element is composed of a viscous liquid filled between the bushing 23 and the flywheel 24 .

When the inertia shock absorbing component is under the action of an earthquake, the ball screw 21 converts the linear relative motion of its two ends into the high-speed rotational motion of the flywheel 24, that is, realizes the conversion of "translation-rotation", and the moment of inertia of the flywheel 24 will generate an inertial force. This inertial force is much greater than the inertial force produced by its physical mass, thereby achieving the effect of inertia capacity enhancement; meanwhile, the rapid rotation of the flywheel 24 can amplify the damping of the damping element 25, thereby achieving the effect of energy consumption enhancement.

The inertial damping component utilizes the inertia amplification mechanism and tuning mechanism of the flywheel 24 to achieve dynamic mass amplification and energy consumption efficiency enhancement, that is, to realize the adjustment of the structural inertia characteristics of the bridge 51 under the premise of basically not changing the physical quality.

As shown in FIG. 1 , in a specific implementation of the anti-fall beam damping device provided by the embodiment of the present invention, the end of the ball screw 21 away from the sleeve 23 is provided with a first ball joint 26 , the sleeve The end of the tube 23 away from the ball screw 21 is provided with a second ball joint 27, the first ball joint 26 is connected with the first support, and has a degree of freedom of rotation relative to the first support, the second ball joint 27 is connected with the second support connected and have a degree of freedom to rotate relative to the second support.

Further, as shown in FIG. 1, in a specific implementation of the anti-fall beam damping device provided in the embodiment of the present invention, the first support and the second support both include a bottom plate 11, a mounting plate 12 and a cover Plate 13, base plate 11 is used to connect with bridge 51 or pier 52, mounting plate 12 is connected with base plate 11, cover plate 13 is connected with mounting plate 12, and first ball joint 26 or second ball joint 27 is clamped on mounting plate 12 and Between the cover plates 13 , there is a degree of freedom of rotation relative to the mounting plate 12 and the cover plate 13 .

It should be noted that the two ends of the inertial damping assembly are respectively connected in rotation with the first support and the second support, so that there is a degree of freedom of rotation relative to the first support and the second support, which can effectively unload and convert inertia Tolerate the shearing force at the connection between the shock-absorbing component and the first support and the second support, and prevent the connection from breaking.

As shown in FIG. 1 , in a specific implementation of the anti-fall beam damping device provided by the embodiment of the present invention, the cable 30 is a high-strength steel cable or a memory alloy cable.

The drag cable 30 can play the role of pier-beam connection, and when the inertial damping assembly reaches the maximum working displacement, it plays a tensioning role, and pulls the bridge 51 to prevent the occurrence of falling beams, so as to realize the purpose of preventing falling beams.

Please refer to Figure 2 and Figure 3 together. Based on the same inventive concept, the embodiment of the present application also provides an anti-fall beam damping system, including: the above-mentioned anti-fall beam damping device and vibration isolation support 40, the anti-fall beam The damping device is respectively connected with the bridge 51 and the bridge pier 52; the shock-isolation support 40 is arranged between the bridge 51 and the bridge pier 52, and the upper and lower ends are respectively connected with the bridge 51 and the bridge pier 52.

Specifically, the anti-falling beam damping device is arranged on the side of the bridge pier 52 where beams are likely to fall, and is arranged along the direction where beams are likely to fall.

As shown in Figure 2 and Figure 3, in a specific implementation of the anti-fall beam damping system provided by the embodiment of the present invention, the maximum displacement allowed by the inertial damping assembly is greater than the maximum shear allowed by the vibration isolation support 40. Cut deformation.

As shown in FIG. 2 and FIG. 3 , in a specific implementation of the anti-fall beam damping system provided by the embodiment of the present invention, the allowable maximum displacement of the cable 30 is greater than the allowable maximum displacement of the inertial damping assembly.

The beneficial effect of the anti-falling beam damping system provided by the embodiment of the present invention is: compared with the prior art, the anti-falling beam damping system provided by the embodiment of the present invention can realize "multiple lines of defense, hierarchical destruction", and the earthquake effect , the seismic isolation support 40 on the top of the pier provides the first line of defense, and the maximum displacement of the seismic isolation support 40 under this line of defense does not exceed the allowable shear deformation of the seismic isolation support 40; the inertial shock absorption component provides the second line of defense, Consume seismic energy during earthquake action, adjust the frequency of the structure, and provide stiffness when the isolation support 40 exceeds the limit deformation; the cable 30 provides the third line of defense, after the isolation support 40 and inertial shock absorber components fail It plays the role of pier-beam connection to realize the purpose of anti-fall beam; through the synergistic effect of the isolation support 40 and the anti-fall beam shock-absorbing device, it finally realizes "small, moderate earthquakes are not damaged, large earthquakes consume energy, and giant earthquakes do not Falling Beams" goal.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (9)

1. The utility model provides a prevent roof beam damping device that falls which characterized in that includes:

the first support is suitable for being connected with a bridge (51);

the second support is suitable for being connected with the bridge pier (52);

the inertial damping component is transversely arranged, one end of the inertial damping component is connected with the first support, and the other end of the inertial damping component is connected with the second support; and

and one end of the inhaul cable (30) is connected with the first support, and the other end of the inhaul cable is connected with the second support.

2. The anti-drop beam shock absorbing device according to claim 1, wherein the inertial damping assembly comprises a ball screw (21), a nut (22), a sleeve (23), a flywheel (24) and a damping element (25), one end of the ball screw (21) is connected with the first support, and the other end extends into the sleeve (23); the sleeve (23) is connected with the second support; the nut (22) is arranged at one end of the sleeve (23) facing the first support and is in running fit with the sleeve (23); the flywheel (24) is connected with the nut (22) and is in running fit with the sleeve (23); the damping element (25) is arranged between the flywheel (24) and the sleeve (23), is connected with the sleeve (23), and is attached to the flywheel (24).

3. The beam drop prevention shock absorbing device according to claim 2, wherein a first ball joint (26) is arranged at one end of the ball screw (21) away from the sleeve (23), a second ball joint (27) is arranged at one end of the sleeve (23) away from the ball screw (21), the first ball joint (26) is connected with the first support and has a degree of freedom of rotation relative to the first support, and the second ball joint (27) is connected with the second support and has a degree of freedom of rotation relative to the second support.

4. A beam drop prevention shock absorbing device according to claim 3, wherein the first and second supports each comprise a base plate (11), a mounting plate (12) and a cover plate (13), the base plate (11) is used for being connected with a bridge (51) or a bridge pier (52), the mounting plate (12) is connected with the base plate (11), the cover plate (13) is connected with the mounting plate (12), and the first ball joint (26) or the second ball joint (27) is clamped between the mounting plate (12) and the cover plate (13) and has a degree of freedom of rotation relative to the mounting plate (12) and the cover plate (13).

5. The beam drop prevention shock absorbing device according to claim 1, wherein the stay (30) is a high strength steel cable stay or a memory alloy stay.

6. A beam fall prevention shock absorbing system, comprising:

a girder-falling prevention shock absorbing device according to any one of claims 1 to 3, respectively connected to a bridge (51) and a pier (52); and

the shock insulation support (40) is arranged between the bridge (51) and the bridge pier (52), and the upper end and the lower end of the shock insulation support are respectively connected with the bridge (51) and the bridge pier (52).

7. The beam drop prevention shock absorbing system as defined in claim 6, wherein the beam drop prevention shock absorbing device is disposed along a beam drop direction of the bridge (51) and is disposed on a side of the shock insulation support (40) where the beam drop direction of the bridge (51) is likely to occur.

8. The anti-drop beam shock system of claim 7, wherein the maximum allowable displacement of the inertial damping assembly is greater than the maximum allowable shear deformation of the shock mount (40).

9. The anti-drop beam shock system of claim 8, wherein the allowed maximum displacement of the pull cable (30) is greater than the allowed maximum displacement of the inertial damping assembly.