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Double spiral wind-rain resistant vibration damping method

A double helix, wind and rain technology, used in bridge parts, erection/assembly of bridges, bridges, etc., to achieve the effect of improving service life, suppressing wind and rain vibration, and reducing damage

Active Publication Date: 2009-12-23
SHANGHAI PUJIANG CABLE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, prone to wind and rain vibration

Method used

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Experimental program
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Effect test

Embodiment Construction

[0023] The embodiments of the present invention are described in detail below: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation is provided, but the protection scope of the present invention is not limited to the following embodiments.

[0024] In this embodiment, the double helix anti-wind and rain vibration reduction method includes:

[0025] 1. High-strength galvanized steel wire and spiral ribs enter the factory, and do a good job of quality inspection.

[0026] 2. Steel wire blanking, enter the production line.

[0027] 3. Steel wire stranding

[0028] The steel wire bundles are twisted concentrically to the left, and the twisting angle of the outermost layer of steel wires is 3°±0.5°.

[0029] 4. wrapping

[0030] The twisted steel wire bundle is added with a wrapping tape, and the overlapping width of a single layer should be less than 1 / 3 of the bandwidth. The wrapping layer should ...

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PUM

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Abstract

The invention relates to a vibration damping method in the technical field of bridge machines, in particular to a double spiral wind-rain resistant vibration damping method. The method mainly comprises the following steps: (1) twisting steel wires; (2) enwrapping, wherein enwrapping layers are uniform and compact and have no damage; (3) performing extrusion molding on a bundle of steel wires, winding spiral ribs, and extruding two cover layers of black PE and multicolor PE outside the enwrapped bundle of the steel wires, wherein the cover layers are wrapped compactly; (4) cutting off marks; (5) manufacturing an anchor; (6) performing super tensioning; and (7) packaging. The method inhibits the damage of wind-rain induced vibration to inhaul cables, and improves the service life of the inhaul cables.

Description

technical field [0001] The invention relates to a vibration reduction method in the technical field of bridge machinery, in particular to a double helix anti-wind and rain vibration reduction method. Background technique [0002] The wind-rain vibration of stay cables is a typical low-frequency and large-scale vibration, and generally appears in the first three-order mode. Under the action of wind in the range of light wind to high wind (seven-level wind), the rain hits the cable and moves around the circular section of the cable. There are rain stagnation points on the cross section of the cable, and the rainwater at the stagnation points of each section A rain line is formed along the length of the cable. The rain line is in a stable state under the action of the wind, and its height is high enough to change the cross-sectional shape of the cable and generate lift. As a result, the cable with the rain line is affected by the airflow, resulting in vibration inside or outs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/16E01D21/00
Inventor 李刚罗国强张海良谢飞崔恒峰
Owner SHANGHAI PUJIANG CABLE
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