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Open-hole aerodynamic structure for improving galloping stability of main girder of pedestrian suspension corridor bridge

A technology of stability and main girder, which is applied in the direction of suspension bridges, bridges, bridge parts, etc., can solve the problems of narrow bridge deck, wind sensitivity, large span of pedestrian suspension cable bridge, etc., to facilitate construction and improve galloping stability sexual effect

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 pedestrian suspension bridge has a large span and a narrow bridge deck, and is sensitive to wind, so the wind safety of the structure must be considered

Method used

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  • Open-hole aerodynamic structure for improving galloping stability of main girder of pedestrian suspension corridor bridge
  • Open-hole aerodynamic structure for improving galloping stability of main girder of pedestrian suspension corridor bridge

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Experimental program
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Effect test

Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] figure 1 is the cross-sectional view of the aerodynamic structure of the opening, figure 2 For elevation.

[0016] 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, and the segment length is 2.095m. A plurality of rectangular holes (1) are evenly arranged between the bottoms of the main girders (2) on both sides of the model and the bottoms of the webs (3). Rectangular hole (1) hole size is long 5cm, wide 1.5cm; Rectangular hole (1) band chamfering, chamfering radius 0.3cm. The lower ...

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Abstract

The invention discloses an open-hole aerodynamic structure for improving the galloping stability of the main girder of a pedestrian suspension corridor bridge, namely, oblong holes with chamfers are uniformly arranged between the bottom of the main girder on both sides and the bottom of the web plate, so as to improve galloping stability of the structure; The critical wind speed of galloping vibration of the main girder with the aperture aerodynamic structure is significantly higher than that of the original section, and the aerodynamic instability is effectively controlled.

Description

technical field [0001] The invention relates to an open-hole aerodynamic structure 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 tunnel t...

Claims

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Application Information

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IPC IPC(8): E01D11/02E01D19/00
CPCE01D11/02E01D19/00
Inventor 周强马汝为李明水陈敏捷李志国廖海黎
Owner SOUTHWEST JIAOTONG UNIV