CN114960758A

CN114960758A - Suspension tunnel pipe section vibration damper

Info

Publication number: CN114960758A
Application number: CN202210709958.2A
Authority: CN
Inventors: 杨赢; 金利成; 吴松华
Original assignee: University of Shaoxing
Current assignee: University of Shaoxing
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-08-30

Abstract

The invention discloses a vibration damper for a suspended tunnel pipe section, which comprises a buoyancy tank positioned above a suspended tunnel pipe body, wherein the buoyancy tank is connected with an anchoring platform through a high-strength spring and a vertical damper; the bottom of the anchoring platform is provided with an arc, and the bending radius of the arc is consistent with the radius of the outer wall of the suspended tunnel pipe body, so that the anchoring platform is attached and fixed on the suspended tunnel pipe body; the anchor platform is connected with a plurality of limiting rods, the top ends of the limiting rods are connected with limiting plates, and the bottom surfaces of the limiting plates are provided with viscous damping materials. The whole vibration damping system is balanced in internal stress, the vibration damping purpose of vertical vibration of the suspended tunnel tube body is achieved through the resonance principle of the tube section and the vibration damping device, the problem of installation space of the TMD vibration damping device of the suspended tunnel can be effectively solved, meanwhile, buoyancy loss of the suspended tunnel structure cannot be caused by the adoption of the buoyancy tank, and the structural stability is maintained.

Description

Suspension tunnel pipe section vibration damper

Technical Field

The invention relates to the technical field of civil engineering, in particular to a vibration damper for a suspended tunnel pipe section.

Background

The suspension tunnel is a novel tunnel structure crossing over water areas and sea areas, mainly comprises pipe sections, anchor cables, a foundation, revetment sections and the like, and has the advantages of large crossing ability, adaptability to deep water complex environment, all-weather operation, good environmental protection and economical efficiency and the like.

For a large-span flexible structure such as a suspended tunnel pipe body, vibration is easy to occur under the action of external loads such as ocean currents or vehicles. The long-term vibration that lasts of structure not only can lead to fatigue failure, and when outer load excitation frequency and structure natural frequency are close, still can take place resonance phenomenon, leads to the dynamic response of suspension tunnel to enlarge by a wide margin, brings very big potential safety hazard for suspension tunnel structure. Tuned Mass Dampers (TMDs) are common vibration damping devices in engineering construction today. Because the internal space of the suspension tunnel tube body is limited, and the large-mass TMD is installed, the suspension tunnel tube body has insufficient floating weight ratio. Therefore, the conventional TMD damping device has more limitations in application to the suspension tunnel, and a TMD damping device suitable for structural characteristics of the suspension tunnel needs to be provided.

In order to solve the problems, the scheme is developed accordingly.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a vibration damper for a suspended tunnel pipe section, which is used for reducing the vibration response of a suspended tunnel pipe body under the action of external load.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a suspension tunnel pipe section vibration damper is arranged on the upper surface of a suspension tunnel pipe body and comprises a floating box positioned above the suspension tunnel pipe body, wherein the floating box is connected with an anchoring platform through a high-strength spring and a vertical damper;

resistance reducers are fixedly arranged on two sides of the floating box;

the anchoring platform is a steel plate with an arc at the bottom, the bending radius of the arc at the bottom is consistent with the radius of the outer wall of the suspension tunnel pipe body, and the anchoring platform is attached above the suspension tunnel pipe body and is fixed with the suspension tunnel pipe body through a high-strength bolt.

The anchoring platform is connected with a plurality of limiting rods, the top ends of the limiting rods are connected with limiting plates, the limiting plates are rectangular steel plates with viscous damping materials on the bottom surfaces, and the limiting plates are anchored at the top ends of the four limiting rods through high-strength bolts;

preferably, the anchoring platform is connected with four limiting rods, the top ends of the limiting rods are connected with limiting plates, and viscous damping materials are arranged on the bottom surfaces of the limiting plates.

Preferably, the buoyancy tank is a cuboid thin-wall steel tank and is arranged among the four limiting rods; the resistance reducer is a thin-wall steel prism and is welded on two sides of the long edge of the floating box.

Preferably, the limiting rod is an angle steel with double sliding chutes and is respectively connected with the limiting plate and the anchoring platform through high-strength bolts;

preferably, the high-strength spring is internally provided with a vertical telescopic rod which is positioned at the inner side of the limiting rod, the upper part of the high-strength spring is welded at four corners of the bottom surface of the floating box, and the lower part of the high-strength spring is welded at the anchoring platform;

preferably, the vertical damper is a viscous damper, the upper end of the viscous damper is connected with the buoyancy tank through a bolt, and the lower end of the viscous damper is attached with a damping gasket and connected with the anchoring platform;

preferably, the damping gasket is made of a circular viscous damping material, is located at the bottom of the vertical damper and is fixed on the anchoring platform.

(III) advantageous effects

After adopting the technical scheme, compared with the prior art, the invention has the following advantages:

1. the suspension tunnel pipe section vibration damper has the advantages of clear structure, convenience in installation and reliable performance, the stress inside the whole vibration damping system is balanced, the vibration damping purpose of vertical vibration of the suspension tunnel pipe body is achieved through the resonance principle of the pipe section and the vibration damper, the problem of installation space of the TMD vibration damper of the suspension tunnel can be effectively solved, meanwhile, the buoyancy loss of the suspension tunnel structure cannot be caused by adopting the buoyancy tank, and the structural stability is favorably maintained.

2. According to the vibration damper for the suspended tunnel pipe section, when the pipe section is vibrated up and down, the pipe section can drive the anchoring platform fixedly connected with the top of the pipe section to vibrate up and down together, and the internal floating box is driven to vibrate up and down relative to the anchoring platform. The floating box reduces friction through balls in the double-sliding-groove limiting rods, the vibration of the floating box has a tuning effect on the pipe section, and the amplitude is reduced through the energy consumption of the vertical damper; when the buoyancy tank vibrates greatly, the displacement process of the buoyancy tank is limited by the top limiting plate, and the viscous damping material colliding with the bottom of the limiting plate dissipates part of energy.

Drawings

FIG. 1 is a schematic view of the overall structure of a suspension tunnel equipped with the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic cross-sectional structure;

fig. 4 is a schematic longitudinal sectional structure.

In the figure: 1. a buoyancy tank; 2. a limiting plate; 3. a drag reducer; 4. a limiting rod; 5. a high-strength spring; 6. a vertical damper; 7. a damping shim; 8. an anchoring platform; 9. a pipe section.

Detailed Description

The invention is explained in more detail below with reference to the figures and examples.

As shown in fig. 1, the suspension tunnel segment for installing the suspension tunnel pipe damping device comprises: the device comprises a buoyancy tank 1, a limiting plate 2, a drag reducer 3, a limiting rod 4, a high-strength spring 5, a vertical damper 6, a damping gasket 7, an anchoring platform 8 and a pipe section 9.

The pipe section 9 is a suspended tunnel pipe body and is used for bearing traffic load of vehicles. The anchoring platform 8 is a horizontal steel plate with an arc at the bottom, is attached to the top of the pipe section 9 and is fixedly connected with the pipe section through a high-strength bolt.

The main structure of the invention is shown in fig. 2 and comprises a buoyancy tank 1, a limiting plate 2, a resistance reducing device 3, a limiting rod 4, a high-strength spring 5, a vertical damper 6, a damping gasket 7 and an anchoring platform 8.

As shown in fig. 2-3, four corners of the bottom of the buoyancy tank 1 are connected with telescopic rods inside the high-strength springs 5, the middle point of the long edge of the buoyancy tank 1 is connected with the vertical damper 6, and the buoyancy tank 1 vibrates due to the vibration of the pipe section 9, so that the tuning effect is achieved.

As shown in figure 2, the limiting plate 2 is connected with the top end of the limiting rod 4 through a high-strength bolt, and the bottom surface of the limiting plate 2 is provided with viscous damping materials to play a role in limiting the displacement process of the buoyancy tank 1 and dissipate a part of energy through collision.

The resistance reducers 3 are welded on two sides of the long edge of the floating box and play a role in reducing the transverse resistance of the water body.

As shown in fig. 3, the limiting rod 4 is provided with double sliding grooves, balls are arranged in the sliding grooves and used for reducing friction of the buoyancy tank during vertical vibration, and the limiting rod 4 is connected with the anchoring platform 8 through a high-strength bolt.

As shown in fig. 2, four high-strength springs 5 are located at four corners of the buoyancy tank 1, telescopic rods are arranged in the springs, and two ends of each spring are anchored to the bottom of the buoyancy tank 1 and an anchoring platform 8 respectively to play a role in buffering and limiting the buoyancy tank 1 to vibrate only in the vertical direction.

As shown in fig. 2, the bottoms of the vertical dampers 6 are respectively connected with the anchoring platform 8 through damping gaskets 7, the damping gaskets 7 at the bottoms are used for buffering, and the vertical dampers 6 play a role in energy consumption.

As shown in fig. 1-2, the anchoring platform 8 is a connecting member between the limiting rod 4 and the suspended tunnel pipe section 9, and is fixed on the surface of the suspended tunnel pipe section 9 through a high-strength bolt.

The suspension tunnel sets up in the aquatic of certain degree of depth, and when rivers passed through the suspension tunnel, the pipeline section 9 that belongs to flexible structure easily takes place to flow and causes the vibration. This device can effectively restrain suspension tunnel pipe section 9's vertical vibration.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and the protection scope must be determined by the scope of the claims.

Claims

1. Suspension tunnel pipeline section vibration damper, the device is installed in suspension tunnel body upper surface, its characterized in that: the floating tunnel comprises a floating box (1) positioned above a suspended tunnel pipe body, wherein the floating box (1) is connected with an anchoring platform (8) through a high-strength spring (5) and a vertical damper (6);

the anchoring platform (8) is attached to and fixed on the suspension tunnel pipe body;

the anchoring platform (8) is connected with a plurality of limiting rods (4), the top ends of the limiting rods (4) are connected with limiting plates (2), and the bottom surfaces of the limiting plates (2) are provided with viscous damping materials;

and resistance reducers (3) are fixedly arranged on two sides of the floating box (1).

2. The suspended tunnel pipe section vibration damping device according to claim 1, wherein: the floating box (1) is a cuboid thin-wall steel box, and the resistance reducing device (3) is a thin-wall steel prism.

3. The suspended tunnel pipe section vibration damping device according to claim 1, wherein: the anchoring platform (8) is a horizontal steel plate with an arc at the bottom, the bending radius of the arc at the bottom is consistent with the radius of the outer wall of the suspension tunnel pipe body, and the anchoring platform is fixed with the suspension tunnel pipe body through a high-strength bolt.

4. The vibration damper for suspended tunnel pipe sections according to claim 1, wherein: high strength spring (5) embeds there is vertical telescopic link to be located gag lever post (4) inboard, vertical telescopic link's upper end welds respectively in flotation tank (1) bottom surface four corners, and the lower part welds in anchor platform (8).

5. The suspended tunnel pipe section vibration damping device according to claim 1, wherein: the vertical damper (6) is a viscous damper, the upper end of the viscous damper is connected with the buoyancy tank (1) through a high-strength bolt, and the lower end of the viscous damper is attached with a damping gasket (7) and connected with the anchoring platform (8).

6. The suspended tunnel pipe section vibration damping device according to claim 4, wherein: the damping gasket (7) is made of circular viscous damping materials.

7. The suspended tunnel pipe section vibration damping device according to claim 1, wherein: the limiting plates (2) are rectangular steel plates, four limiting rods (4) are arranged, and the limiting plates (2) are anchored at the top ends of the four limiting rods (4) through high-strength bolts.

8. The suspended tunnel pipe section vibration damping device according to claim 1, wherein: the limiting rod (4) is an angle steel with double sliding grooves, the sliding grooves are internally provided with rolling balls, and four sides of the floating box (1) are respectively arranged in the corresponding sliding grooves and are abutted against the rolling balls.