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Pneumatic control device for improving flutter stability of steel trussed girder suspension bridge

A technology of pneumatic control and steel truss girders, which is applied to suspension bridges, bridges, bridge parts, etc., and can solve problems such as increasing the drag coefficient of bridges

Active Publication Date: 2010-06-16
中交公规土木大数据信息技术(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the control effect of the central stabilizing plate has a great relationship with its height, and the setting of the central stabilizing plate increases the drag coefficient of the bridge

Method used

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  • Pneumatic control device for improving flutter stability of steel trussed girder suspension bridge
  • Pneumatic control device for improving flutter stability of steel trussed girder suspension bridge
  • Pneumatic control device for improving flutter stability of steel trussed girder suspension bridge

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawings and examples.

[0024] In order to improve the flutter stability of the steel truss girder suspension bridge, the present invention sets the bridge deck 3 with a central slot 1 (such as figure 1 As shown), the central slot 1 is arranged continuously along the longitudinal bridge to the whole bridge, and the width of the central slot 1 is: d=1 / 100~1 / 10 steel truss width (B). At the same time, two aerodynamic flaps 2 are installed symmetrically inside the two sides of the steel truss 4. The aerodynamic flaps 2 are arranged horizontally and are fixedly connected to the steel truss 4 through the columns 5 and longitudinal beams 6. The aerodynamic flaps 2 are continuously arranged in the longitudinal direction of the bridge. The mid-span area of ​​the main span of the bridge (such as figure 2 shown), the layout length is: L 1 = 1 / 2 ~ 1 suspension bridge main span span (L). The...

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Abstract

The invention provides a pneumatic control device for improving flutter stability of a steel trussed girder suspension bridge, which relates to the bridge technology. The device of the invention is a combination of bridge deck central slotting and pneumatic wing plates, wherein, the width of the slotting is 1 / 100-1 / 10 of the width of the steel trussed girder; thetwo pneumatic wing plates are symmetrically installed on two sides of the steel trussed girder and arranged longitudinally and continuously along the bridge, wherein, the total arrangement length is 1 / 2-1 time of the span length of a midspan area of a main span; the two pneumatic wing plates are arranged vertically along the bridge in a single layer, double layer or multilayer mode; the width of each pneumatic wing plate is 1 / 30-1 / 10 of the width of the steel trussed girder; the horizontal distance from the centers of the pneumatic wing plates to a center longitudinal axis of the bridge is 1 / 3-1 / 2 of the width of the steel trussed girder, and the vertical distance from the centers of the pneumatic wing plates to the bottom of the steel trussed girder is 1 / 4-1 / 2 of the height of the steel trussed girder; and the cross sections of the pneumatic wing plates are in an elliptic shape, or a flat plate shape with a round end or a triangle air nozzle. The pneumatic control device changes the air flow characteristic of the steel trussed girder, obviously improves the flutter stability of the steel trussed girder suspension bridge, and has simple structure, convenient installation and good economical efficiency.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, and relates to a combined aerodynamic control device for improving the flutter stability of a steel truss girder suspension bridge with a slot in the center of a bridge deck and an aerodynamic wing plate. Background technique [0002] Steel truss girder is a common form of stiffening girder for long-span suspension bridges. When the wind speed at the location of the long-span steel truss suspension bridge is high, the flutter stability of the bridge often cannot meet the wind resistance design requirements. For the sake of economy, some aerodynamic control measures are usually required to improve the flutter stability of the bridge. At present, some aerodynamic measures have been applied in steel truss suspension bridges, including: the central slot of the bridge deck, the central stabilizing plate, and so on. [0003] The test results show that the groove in the center of the bridge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00E01D11/02E04B1/98
Inventor 刘高刘天成王秀伟彭运动孔庆凯廖海黎朱乐东
Owner 中交公规土木大数据信息技术(北京)有限公司
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