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Aerodynamic structure of deflector for improving galloping stability of main girder of pedestrian suspension corridor bridge

A deflector and stability technology, applied in the field of deflector aerodynamic structure, can solve problems such as lack of thorough research, and achieve the effect of improving the stability of galloping vibration

Pending Publication Date: 2019-01-18
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mechanism of this type of method has not been thoroughly studied, so the specific type, size and layout of this type of deflector need to be tested by wind tunnel tests

Method used

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  • Aerodynamic structure of deflector for improving galloping stability of main girder of pedestrian suspension corridor bridge
  • Aerodynamic structure of deflector for improving galloping stability of main girder of pedestrian suspension corridor bridge

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Experimental program
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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] figure 1 is the cross-sectional view of the aerodynamic structure of the deflector, figure 2 For top view.

[0014] In order to verify the effectiveness of this structure, the test was carried out in XNJD-1 of Southwest Jiaotong University. In the mid-span segment model of the wind tunnel test with a ratio of 1:10 to the actual bridge, the model is 5.7cm high, 34.5cm wide, and has an I-shaped shape. The main beam (3) is 4.7cm high, and the side beam (4) is a circular tube section with a diameter of 2.5cm. The model deflector (1) is a rectangular chamfered sheet with a length of 10 cm and a width of 5 cm, covering the gap between the main beam (3) and the side beam (4), forming a grid, and between every two transverse deflectors The interval is 5cm. The vertical stabilizing plate (2) is a strip with a width of 2 cm, which i...

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Abstract

The invention discloses an aerodynamic structure of a deflector for improving the galloping stability of the main girder of a pedestrian suspension corridor bridge. A grating is formed through the interval arrangement of strip-shaped guide plates between a main beam and a side beam. At the same time, a vertical stabilizer plate is installed on the inner side of the main girder, which is symmetrically arranged at the bottom of the main girder. The aerodynamic structure of the stabilizer plate and the air guide plate together improves the galloping stability of the main girder of the bridge effectively.

Description

technical field [0001] The invention relates to an aerodynamic structure of a deflector for improving the galloping stability of a main girder of a pedestrian suspension cable corridor bridge, and belongs to the field of bridge wind engineering. Background technique [0002] Along with economic development and people's living needs, a large number of pedestrian suspension bridges have been built in various places. However, the pedestrian suspension bridge with long span and narrow bridge deck is sensitive to wind, so the wind safety of the structure must be considered. In particular, the frequent occurrence of typhoons in the southeast coastal areas of China and the surrounding topography, characteristic buildings, etc. lead to very complex wind environment characteristics. Therefore, in order to ensure the wind-resistant safety and comfortable use of pedestrian suspension bridges, it is necessary to evaluate the wind-resistant characteristics of the bridge through wind tun...

Claims

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Application Information

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IPC IPC(8): E01D11/02E01D19/00
CPCE01D11/02E01D19/00
Inventor 周强秦川李明水李志国马汝为廖海黎
Owner SOUTHWEST JIAOTONG UNIV