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Pneumatic device for vortex vibration control of I-shaped composite beam bridge and its application method

A pneumatic device, I-shaped technology, applied in bridges, bridge construction, bridge parts, etc., can solve problems such as vortex-induced vibration, and achieve the effects of extending service life, eliminating vortex-induced vibration, and improving driving comfort and safety.

Inactive Publication Date: 2021-06-01
SOUTHWEST JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the I-shaped composite beam bridge is prone to vortex-induced vibration, the invention discloses a pneumatic device for controlling the vortex vibration of the I-shaped composite beam bridge

Method used

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  • Pneumatic device for vortex vibration control of I-shaped composite beam bridge and its application method
  • Pneumatic device for vortex vibration control of I-shaped composite beam bridge and its application method
  • Pneumatic device for vortex vibration control of I-shaped composite beam bridge and its application method

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Embodiment Construction

[0025] The technical solutions of the present invention will be further described below through specific examples. The following examples are to further illustrate the present invention, but not to limit the scope of the present invention.

[0026] Figures 1 to 4 A specific embodiment of the invention is shown. In this embodiment, the pneumatic device for eddy vibration control of an I-shaped composite girder bridge includes a deflector 1 , a connecting piece 3 and a deflector stiffener 2 . One end of the deflector 1 in the width direction is connected to the first end of the connector 3 ; the first end of the deflector stiffener 2 is connected to the surface of the deflector 1 . In a specific embodiment, the connection between the connecting piece 3 and the deflector 1 and the connection between the stiffener 2 of the deflector and the deflector 1 are all welded.

[0027] The connecting piece 3 is a semi-elliptical connecting plate, and the first end and the second end of...

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Abstract

The invention discloses a pneumatic device and a using method for controlling vortex vibration of an I-shaped composite beam bridge. The pneumatic device includes a deflector, a connecting piece and a stiffening plate of the deflector; one end of the deflector in the width direction is connected with the first end of the connecting piece; The outer edge of the I-shaped longitudinal beam bottom plate of the combined beam is connected, so that an obliquely downward angle less than 90° is formed between the deflector and the I-shaped longitudinal beam bottom plate; the first end of the deflector stiffener and the The surface of the deflector is connected; the second end of the stiffener of the deflector opposite to the first end of the stiffener of the deflector is used for connecting with the surface of the bottom plate of the I-shaped stringer. The pneumatic device involved in the present invention can change the flow field characteristics at the bottom and inside of the I-shaped composite beam, suppress the generation of vortices or make the large vortices be blown away by the incoming flow, eliminate the vortex-induced vibration of the main beam, thereby improving the driving performance. Comfort and safety, and help to extend the service life of the bridge.

Description

technical field [0001] The invention relates to the fields of bridge engineering and disaster prevention engineering, in particular to a pneumatic device for controlling vortex vibration of an I-shaped composite beam bridge and a method for using the same. Background technique [0002] I-shaped composite beams are widely used in the design of modern cable-stayed bridges due to their light weight, convenient construction, and superior mechanical performance. More complex, so that the vortex-induced vibration response of this type of bridge is also more significant. Although vortex-induced vibration will not cause devastating damage to the bridge like flutter and galloping, it will affect the driving comfort and accelerate the fatigue of bridge components, thus affecting the operational safety of the bridge. Therefore, it is of great significance to take effective measures to control the eddy vibration amplitude of the bridge. Contents of the invention [0003] In order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/00
CPCE01D19/00
Inventor 王骑宁伯伟段雪炜龚佳琛廖海黎李龙安邱峰
Owner SOUTHWEST JIAOTONG UNIV
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