CN214459561U - Damping vibration attenuation device for controlling vortex-induced vibration of main beam of long-span bridge - Google Patents

Abstract

The utility model relates to the technical field of bridge engineering, and discloses a damping vibration damper for controlling vortex-induced vibration of a girder of a long-span bridge, which comprises a rigid arm, wherein a transverse bridge direction of the rigid arm is arranged on a bridge pier, and one end of the rigid arm is hinged with the bridge pier; one end of the viscous damper is hinged to the bridge pier stud, the other end of the viscous damper is hinged to the rigid arm, and the viscous damper and the rigid arm are not collinear; and the connecting device is arranged between the bridge girder and the rigid arm and is used for connecting the bridge girder and the rigid arm. The utility model has the advantages of it is following and effect: firstly, the application controls the vortex-induced vibration of a main beam through an amplifying structure formed by a viscous damper and a rigid arm; secondly, this application adopts the amplification device that connecting device, rigid arm and viscous damper combination formed can adapt to the vibration frequency of broad spectrum for this device is suitable for bridge wide range, the span is big, the transmission displacement is reliable and the structure atress is clear and definite, can control the multistage vortex induced vibration of girder simultaneously.

Description

Damping vibration attenuation device for controlling vortex-induced vibration of main beam of long-span bridge

Technical Field

The application relates to the technical field of bridge engineering, in particular to a damping vibration attenuation device for controlling vortex-induced vibration of a girder of a long-span bridge.

Background

In recent years, the vortex-induced vibration of large-span bridges is frequent, and only in half a year 2020, the wind-induced vortex-induced vibration occurs in succession in the Changjiang river bridge, Tiger door bridge and the Zhoushansi optical latching bridge. The Humen bridge lasts for 10 days from traffic control to traffic recovery due to vortex-induced vibration, and has great influence on normal operation of urban traffic. Although vortex-induced resonance belongs to amplitude-limited vibration, which does not cause structural collapse, if the vibration amplitude is too large, psychological discomfort is caused to pedestrians and vehicle drivers; in addition, long-term vortex-induced vibration can also cause fatigue damage to the structure. Therefore, the control of the vortex-induced vibration of the large-span bridge is of great interest to the industry.

For the manifestation of vortex-induced resonance, it is a forced vibration with self-excited properties. The method mainly has 5 characteristics: (1) is a limited amplitude vibration occurring at lower wind speeds and has low frequency; (2) only within a certain interval of wind speed; (3) the maximum amplitude has great dependence on damping; (4) vortex-induced responses are sensitive to small changes in cross-sectional shape; (5) vortex-induced vibrations can excite bending vibrations as well as torsional vibrations. Since the vortex-induced resonance amplitude is sensitive to damping, it is known from the expression form of vortex-induced vibration that the vortex-induced vibration can be suppressed by increasing the damping of the structure.

In the prior art, a method for dissipating by adopting an amplifying device mainly comprises a damper, a rigid arm and a second rigid arm which are connected by a spherical hinge; and secondly, performing spherical hinge consolidation on the damper and the strut, the top of the rigid arm and the main beam, and the bottom of the second rigid arm and the main beam. Although the device can transmit and amplify the structural displacement of the bridge to the damper to improve the energy consumption efficiency of the damper, on one hand, the damper spherical hinge is fixedly connected on the beam upright post, and the upright post structure is not common in a common large-span bridge, so that the applicable bridge structural form is limited; on the other hand, the displacement amplification function is realized by the rigid rod, so that the section of the rod piece is overlarge, and the connection structure is relatively complex.

SUMMERY OF THE UTILITY MODEL

To the defect that exists among the prior art, the purpose of this application provides a damping vibration damper for controlling long-span bridge girder vortex induced vibration, and the device simple structure connects reliably, can be applicable to the bridge of multiple structure.

In order to achieve the above purposes, on one hand, the technical scheme is as follows: a damping vibration attenuation device for controlling vortex-induced vibration of a girder of a long-span bridge, which is provided with at least two groups, symmetrically arranged on two sides of the bridge, comprises:

the rigid arm is transversely arranged on the bridge pier column in the bridge direction, and one end of the rigid arm is hinged with the bridge pier column;

one end of the viscous damper is hinged to the bridge pier stud, the other end of the viscous damper is hinged to the rigid arm, and the viscous damper and the rigid arm are not collinear;

and the connecting device is arranged between the bridge girder and the rigid arm and is used for connecting the bridge girder and the rigid arm.

Preferably, a balancing weight is further arranged at the joint of the viscous damper and the rigid arm.

Preferably, each side of the balancing weight is provided with an ear plate, and the viscous damper and the rigid arm are hinged with the balancing weight through different ear plates respectively.

Preferably, the rigid arm adopts a steel truss structure.

Preferably, the connecting device is a plurality of steel cables, one end of each steel cable is connected with the main beam, the other end of each steel cable is connected with one end of the rigid arm close to the bridge pier, and the steel cables are parallel to each other.

Preferably, the wire rope is arranged obliquely with respect to the bridge pier.

Preferably, one end of the steel cable close to the main beam is arranged on the outer edge of the main beam.

Preferably, the rigid arm and the viscous damper are arranged perpendicular to each other.

Preferably, the embedded steel plates are embedded in the surfaces of the bridge pier columns, and the rigid arms and the viscous dampers are hinged to the different embedded steel plates respectively.

Preferably, a plurality of stabilizing plates are arranged on one side of the embedded steel plate and embedded in the bridge pier stud.

The beneficial effect that technical scheme that this application provided brought includes:

firstly, the application controls the vortex-induced vibration of a main beam through an amplifying structure formed by a viscous damper and a rigid arm; secondly, this application adopts the amplification device that connecting device, rigid arm and viscous damper combination formed can adapt to the vibration frequency of broad spectrum for this device is suitable for bridge wide range, the span is big, the transmission displacement is reliable and the structure atress is clear and definite, can control the multistage vortex induced vibration of girder simultaneously.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a front view of one embodiment of the present application.

Fig. 2 is a side view of the embodiment shown in fig. 1.

Fig. 3 is an enlarged view of a portion a in fig. 2.

FIG. 4 is a schematic view of the structure of the rigid arm and the viscous damper in the embodiment shown in FIG. 1.

Reference numerals:

1. a rigid arm; 2. a viscous damper; 3. a connecting device; 31. a steel cord; 4. a balancing weight; 41. an ear plate; 5. bridge pier stud; 51. pre-burying a steel plate; 52. a stabilizing plate; 6. a main beam.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

In this embodiment, as shown in fig. 1, damping vibration damper has two sets at least, and the symmetry is established in the bridge both sides respectively, every damping vibration damper includes rigid arm 1, viscous damper 2 and connecting device 3, rigid arm 1 is to establishing on bridge pier stud 5, and its one end and bridge pier stud 5 are articulated, viscous damper 2 articulates on bridge pier stud 5, and its other end and rigid arm 1 are articulated to viscous damper 2 and rigid arm 1 are not collinear, connecting device 3 is used for connecting rigid arm 1 and bridge girder 6.

As an optimization of this embodiment, as shown in fig. 4, a counterweight 4 is further disposed at a connection between the viscous damper and the rigid arm 1, and the counterweight 4 is used to adjust a moment on the rigid arm 1 to amplify a vibration amplitude, so that the viscous damper 2 can dissipate vortex-induced energy more effectively.

Further, as shown in fig. 4, each side of the weight block 4 is provided with an ear plate 41, and the viscous damper 2 and the rigid arm 1 are hinged on the weight block 4 through the ear plates 41, because the weight of the weight block 4 is heavy, the joint is not easily damaged due to the hinging of the ear plates 41.

Furthermore, the rigid arm 1 adopts a steel truss structure, so that the weight of the rigid arm 1 is reduced, the amount of the rotating torque distributed to the rigid arm 1 is reduced, and the rotating amplitude is larger.

As an optimization of the present embodiment, as shown in fig. 2, the connecting device 3 is a plurality of parallel steel cables 31, in the embodiment, one steel cable 31, and in the embodiment with a larger number of other steel cables 31, the steel cables 31 are close to each other and parallel, so that the other steel cables 31 do not obstruct the vibration when the steel cable 31 transmits the vibration.

Furthermore, the steel cable 31 is obliquely arranged relative to the bridge pier stud 5, and from the calculation angle, the transmission of the vortex-induced vibration can be completed only by arranging the steel cable 31 and the girder 6 not vertically, that is, the steel cable 31 is not parallel to the bridge pier stud 5, but from the practical test result, considering the characteristics of construction difficulty, steel cable strength, vortex-induced vibration transmission efficiency and the like, the included angle between the steel cable 31 and the bridge pier stud 5 should not exceed 45 °.

Further, one end of the steel cable 31 close to the main beam 6 is arranged at the outer edge of the main beam 6, so that the vibration of the main beam 6 can be received to the maximum.

As an optimized arrangement of the present embodiment, the rigid arm 1 and the viscous damper 2 are arranged perpendicular to each other, and in a preferable case, the viscous damper 2 is located below the rigid arm 1, so that the amplitude transmission efficiency is the highest.

As the optimized setting of this embodiment, embedded steel plate 51 has been buried underground on bridge pier stud 5 surface, and rigid arm 1 and viscous damper 2 articulate respectively on different steel sheets, in this embodiment, buries underground two, can disperse the atress of rigid arm 1 and viscous damper 2.

Further, one side in embedded steel plate 51 buries bridge pier stud 5 is provided with a plurality of steadying plates 52, and steadying plates 52 have a plurality of pieces in this application, constitute the groined type mutually, and the side view is shown in fig. 2, 3.

The present application is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations are also considered to be within the scope of the present invention.

Claims (10)

1. The utility model provides a damping vibration damper for controlling long-span bridge girder vortex induced vibration which characterized in that, damping vibration damper has at least two sets ofly, and the symmetry sets up in the bridge both sides, damping vibration damper includes:

the rigid arm (1) is transversely arranged on the bridge pier column or the tower column in the bridge direction, and one end of the rigid arm is hinged with the bridge pier column or the tower column;

one end of the viscous damper (2) is hinged to the bridge pier column or the tower column, the other end of the viscous damper is hinged to the rigid arm (1), and the viscous damper (2) and the rigid arm (1) are not collinear;

and the connecting device (3) is arranged between the bridge girder (6) and the rigid arm (1) and is used for connecting the bridge girder (6) and the rigid arm (1).

2. The device of claim 1, wherein the device comprises: and a balancing weight (4) is further arranged at the joint of the viscous damper (2) and the rigid arm (1).

3. The device of claim 2, wherein the damping device is used for controlling the vortex-induced vibration of the girder of the long-span bridge, and is characterized in that: each side surface of the balancing weight (4) is provided with an ear plate (41), and the viscous damper (2) and the rigid arm (1) are hinged to the balancing weight (4) through different ear plates (41).

4. The device of claim 2, wherein the damping device is used for controlling the vortex-induced vibration of the girder of the long-span bridge, and is characterized in that: the rigid arm (1) adopts a steel truss structure.

5. The device of claim 1, wherein the device comprises: the connecting device (3) is provided with a plurality of steel cables (31), one end of each steel cable (31) is connected with the main beam (6), the other end of each steel cable is connected with one end, close to a bridge pier column or a tower column, of the rigid arm (1), and the steel cables (31) are parallel to each other.

6. The device of claim 5, wherein the device comprises: the steel cable (31) is obliquely arranged relative to the bridge pier column or the tower column.

7. The device of claim 5, wherein the device comprises: one end of the steel cable (31) close to the main beam (6) is arranged on the outer edge of the main beam (6).

8. The device of claim 1, wherein the device comprises: the rigid arm (1) and the viscous damper (2) are arranged perpendicularly to each other.

9. The device of claim 1, wherein the device comprises: the embedded steel plates (51) are embedded in the surfaces of the bridge pier columns or the tower columns, and the rigid arms (1) and the viscous dampers (2) are hinged to the different embedded steel plates (51) respectively.

10. The device of claim 9, wherein the damping device is used for controlling vortex-induced vibration of the girder of the long-span bridge, and is characterized in that: a plurality of stabilizing plates (52) are arranged on one side of the embedded steel plate (51), and the stabilizing plates (52) are embedded in the bridge pier column or the tower column.

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