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Wind fairing structure for controlling buffet of cable-stayed bridge

A technology for cable-stayed bridges and air nozzles, which is applied to cable-stayed bridges, bridges, bridge parts, etc., can solve problems such as poor flutter stability, and achieve the effect of improving flutter stability and increasing the critical wind speed of flutter

Inactive Publication Date: 2007-10-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an improved tuyere structure for the flutter control of cable-stayed bridges, which can overcome some shortcomings of the poor flutter stability of the separated double main girder cable-stayed bridge structure in the prior art

Method used

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  • Wind fairing structure for controlling buffet of cable-stayed bridge
  • Wind fairing structure for controlling buffet of cable-stayed bridge
  • Wind fairing structure for controlling buffet of cable-stayed bridge

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] The difference between the present invention and the prior art is that: the tuyere structure 2 is provided on both side edges of the girder 1 of the cable-stayed bridge, and the tuyere structure is made of a thin-walled steel box, and the cross-section of the thin-walled steel box is an acute triangle with an angle of 40-80°. One side of the thin-walled steel box and the side of the main beam are connected together by welding or bolting, and the wall thickness of the thin-walled steel box is 1-8mm.

[0013] The flutter control tuyere structure of the separated double girder cable-stayed bridge is obtained by comparing two flutter control measures by adopting the segmental model flutter control test method. The main results of the segmental model test of the original main beam section and two flutter control measures—the flutter critical wind spee...

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Abstract

The invention relates to a tuyere structure used for stayd-cable bridge buffeting control, its features are: two side of stayd-cable bridge main beam are equipped with tuyere structure, the tuyere structure is composed by thin-wall steel box, the lateral section of the thin-wall steel box is triangular. When the tuyere structure used for stayd-cable bridge buffeting contro is used, the tuyere structure is composed by thin-wall steel box, the thin-wall steel box is triangular, the longest side of triangle is closed to two sides of main beam tightly, it can improve the buffeting critical wind speed significantly and increase the buffeting stability of separated double-main beam stayd-cable bridge effectively.

Description

Technical field: [0001] The patent of the invention relates to the fields of bridge engineering and disaster prevention engineering, in particular to a flutter control air nozzle structure for a cable-stayed bridge installed on a separate double-girder cable-stayed bridge. Background technique: [0002] Separate double main girders are widely used in medium and small span cable-stayed bridges, and there are also application examples in long-span cable-stayed bridges. Due to the passivation of the aerodynamic shape, the flutter stability of the separated double main girder is not ideal. When the flutter stability requirements at the bridge site are relatively high, certain flutter control measures must be taken to increase the critical wind speed of flutter, but the existing flutter control measures often cannot meet the design requirements. Invention content: [0003] The object of the present invention is to provide an improved tuyere structure for flutter control of cab...

Claims

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Application Information

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IPC IPC(8): E01D11/04E01D19/00
Inventor 葛耀君杨咏昕项海帆
Owner TONGJI UNIV
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