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Non-uniformity surface wind-resisting stay cable

A cable-stayed, consistent technology, applied to bridge parts, bridges, buildings, etc., can solve the problems of high construction and maintenance costs, complex structures, etc., and achieve the effect of simple structure, easy implementation, and reduced variation amplitude

Pending Publication Date: 2018-07-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The active control effect is obvious but requires external energy input, and the additional active control equipment makes the structure more complicated, and the construction and maintenance costs are higher

Method used

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  • Non-uniformity surface wind-resisting stay cable
  • Non-uniformity surface wind-resisting stay cable

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Such as figure 1 As shown, the present invention is a non-uniform surface wind-resistant stay cable, including a stay cable, an elliptical control section is set at a certain distance on the stay cable, and the length of the adjacent control sections is The axis directions are perpendicular to each other, forming a non-uniform stay cable surface. The ratio of the major axis to the minor axis of the elliptical control section is 1.1:1. The distance between the control sections is twice the length of the minor axis.

[0018] This structure changes the traditional cylindrical stay cable. The control section is an ellipse with a ratio of long and short axes of 1.1:1, that is, the length of the short axis is D, and the length of the long axis is 1.1D. The direction of the major axis of the control section is vertical, resulting in a surface non-uniform structure. When the incoming wind passes through the stay cable structure, the changing surface makes the length of the w...

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PUM

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Abstract

The invention discloses a non-uniformity surface wind-resisting stay cable. The non-uniformity surface wind-resisting stay cable is characterized in that oval control sections are arranged on the staycable at regular intervals, the long axis directions of the adjacent control sections are perpendicular to each other, and a non-uniformity stay cable surface is formed. When incoming wind blows thestructure of the stay cable, the spatial scale of a wake flow vortex forming region is regularly changed along the center axis through the uneven change of the stay cable surface, the flow uniformityin the center axis direction is weakened through the change, so that the pulsatility of aerodynamic force applied to the stay cable is reduced, wind resistance of the stay cable is facilitated, and the stay cable surface is optimized. The stay cable is simple in structure and clear in principle, and wind-induced vibration of the stay cable can be reduced.

Description

technical field [0001] The invention relates to a non-uniform surface wind-resistant cable stay. Background technique [0002] With the advancement of science and technology and the development of economy, there are more and more long-span cable-stayed bridges and suspension bridges, which also lead to the problem of wind-induced vibration of bridges becoming more and more prominent. As the main component of the cable-stayed bridge, if the stay cables vibrate greatly for a long time, it will seriously affect the service life of the bridge and affect the driving safety. Not only that, the cylindrical structure is also widely used in other structures, such as chimneys, oil pipelines in the ocean, etc. These slender structures are prone to vibrations under the action of wind or water currents. [0003] The circular section is prone to vortex-induced vibration under the action of wind load, and wake galloping may also occur due to the influence of the wake of the surrounding c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/16
CPCE01D19/16
Inventor 陈文礼闵祥威李惠
Owner HARBIN INST OF TECH
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