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Wind-resistant H-shaped steel column for high-speed railway contact network and method for determining aperture ratio of wind-resistant H-shaped steel column

A technology for high-speed railways and determination methods, applied in building types, buildings, towers, etc., to achieve the effects of strong controllability, improved wind resistance stability, and strong practicability

Inactive Publication Date: 2012-04-11
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is still a lack of H-shaped steel columns with high wind resistance and their design methods at home and abroad.

Method used

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  • Wind-resistant H-shaped steel column for high-speed railway contact network and method for determining aperture ratio of wind-resistant H-shaped steel column
  • Wind-resistant H-shaped steel column for high-speed railway contact network and method for determining aperture ratio of wind-resistant H-shaped steel column
  • Wind-resistant H-shaped steel column for high-speed railway contact network and method for determining aperture ratio of wind-resistant H-shaped steel column

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Embodiment Construction

[0038] The present invention will be described in detail below in combination with specific embodiments.

[0039] The H-shaped steel column body currently used in the catenary of high-speed railways is composed of flanges 1 parallel to each other on both sides and webs 2 perpendicular to the flanges 1 in the middle. Set rounded corners at the connection between 2. In order to improve the wind-resistant stability of the H-shaped steel column, the wind-resistant H-shaped steel column of the high-speed railway catenary is provided with an opening 3 on the web 2 of the steel column, and the area of ​​the opening 3 occupies 100% of the web. 2 17% to 40% of the total area; the shape of the opening 3 is rectangular, which can be rectangular or square; the hole size of the opening 3 in the axial direction of the steel column is the same as that in the vertical direction of the steel column ratio of 2 to 2.5; the hole size of the opening 3 in the axial direction of the vertical steel ...

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Abstract

The invention relates to a wind-resistant H-shaped steel column for a high-speed railway contact network and a method for determining an aperture ratio of the wind-resistant H-shaped steel column. The section of the H-shaped steel column for the high-speed railway contact network is H-shaped, so vortex induced vibration and galloping in a crosswind direction happen easily; the long-time higher-amplitude vortex induced vibration leads to fatigue damage of the connected part of the steel column and the galloping leads to direct damage of a strut. A hole is formed in a belly plate of the H-shaped steel column; the structure vibration frequency and the vibration mode of the H-shaped steel column which is not provided with the hole can be obtained by constructing a contact network system structure finite element model and analyzing a structure power characteristic; the strouhal number, the vortex induced vibration locked wind speed, the vortex induced vibration amplitude and the galloping critical wind speed of the section of the H-shaped steel column which is not provided with the hole are tested; and the aperture ratio of the belly plate of the H-shaped steel column is determined through a power section model wind tunnel test, so the wind-resistant stability of the H-shaped steel column is improved effectively. The wind-resistant H-shaped steel column is applicable to wind resistance of the steel column for the high-speed railway contact network and design of the H-shaped steel column with higher wind-resistant stability, and is particularly widely applied to regions under unfavorable environmental conditions, such as wind regions and tuyeres.

Description

technical field [0001] The invention belongs to the technical field of high-speed railway electrification, and in particular relates to a wind-resistant H-shaped steel column of a high-speed railway catenary and a method for determining the opening ratio thereof. Background technique [0002] With the development of high-speed railways, especially in unfavorable environmental conditions such as windy areas and tuyeres with high wind speeds or long wind periods, the safety and reliability of train operations are increasingly affected by strong winds. [0003] The H-shaped steel column is an important equipment supporting the high-speed railway catenary. The cross-sectional shape is H-shaped, which is prone to vortex-induced vibration and galloping in the cross-wind direction. Long-term large-scale vortex-induced vibration will lead to fatigue damage at the joint of the steel column and aggravate the vibration of the contact suspension system; galloping vibration will lead to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04H12/08
Inventor 刘改红马存明孙永革田志军王玉环韩佳栋廖海黎栗怀广张学武宋杰郑刚田升平赵玮宫衍圣李晋
Owner CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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