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Pedestrian guard rail construction used for restraining wind-induced vibration of suspension bridge main beam structure of streamline steel box beam

A wind-induced vibration and sidewalk technology, used in bridges, bridge parts, bridge construction, etc., can solve the problem of limited improvement of vortex-induced vibration performance, and achieve the effect of optimizing vortex-induced vibration performance, simple structure, and reducing vortex-induced vibration amplitude.

Inactive Publication Date: 2015-07-08
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the vortex-induced vibration performance of the main girder can be improved to a limited extent by applying deflectors, etc.

Method used

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  • Pedestrian guard rail construction used for restraining wind-induced vibration of suspension bridge main beam structure of streamline steel box beam
  • Pedestrian guard rail construction used for restraining wind-induced vibration of suspension bridge main beam structure of streamline steel box beam
  • Pedestrian guard rail construction used for restraining wind-induced vibration of suspension bridge main beam structure of streamline steel box beam

Examples

Experimental program
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Effect test

Embodiment Construction

[0016] The present invention will be further described below in conjunction with drawings and embodiments.

[0017] refer to figure 1 , figure 2 , image 3 , the wind-induced vibration suppression structure of the main girder of the streamlined steel box girder suspension bridge, including the specific component form of the main girder pedestrian railing remains unchanged as usual, and only the pedestrian railing is sealed.

[0018] image 3 As a preferred implementation, sidewalk railings are arranged in the form of 2m (closed and airtight) + 6m (hollowout).

[0019] Taking a certain long-span suspension bridge as an example, the wind-induced vibration of the main girder after the construction of the present invention is compared with that of the main girder without any engineering measures through the wind-induced vibration test of the rigid segment model. The segmental model of the main girder was made according to the geometric scale ratio of 1:50, and the wind-induce...

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PUM

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Abstract

The invention discloses pedestrian guard rail construction used for restraining wind-induced vibration of a suspension bridge main beam structure of a streamline steel box beam. Pedestrian guard rails are symmetrically arranged along the central line of a main beam of a bridge side, the pedestrian guard rails are closed for L at every 3L, namely, according to a structure unit of being closed for L and hollow for 3L, the pedestrian guard rails are repeatedly arranged in the length direction of the main beam, and the L is unit length; other components of the pedestrian guard rails remain unchanged. The character of air detour flow of the main beam is changed, the vortex-induced vibration performance of the streamline steel box beam is obviously improved, the structure is simple, the construction is convenient, and the economical efficiency is good.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, and relates to a wind-induced vibration suppression structure of a streamlined steel box girder. Background technique [0002] The long-span suspension bridge structure has low torsional stiffness and small damping. It is a sensitive structure to wind-induced response, and it is prone to vortex-induced vibration problems under the action of natural wind. Vortex-induced vibration is a kind of wind-induced vibration phenomenon that is easy to occur in long-span bridges at low wind speeds. Vortex-induced vibration has self-excited properties, but the vibrating structure will in turn vortex off to form a feedback mechanism, so vortex-induced vibration is A wind-induced limiting vibration with self-excited properties. Since vortex-induced vibration is easy to occur at low wind speed, and the amplitude is large enough to affect driving safety, it is of great significance to avoid vortex-ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/10
CPCE01D19/103
Inventor 马存明段青松廖海黎李明水
Owner SOUTHWEST JIAOTONG UNIV
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