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Pneumatic device for improving vortex vibration performance of double-I-shaped superposed beam bridge

A pneumatic device, double-shaped technology, applied in bridges, bridge construction, bridge parts, etc., can solve the problem of vortex-induced vibration of bridges, and achieve the goal of increasing driving comfort, reducing engineering construction difficulty, and ensuring operational safety. Effect

Pending Publication Date: 2022-08-09
SOUTHWEST JIAOTONG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The invention provides an aerodynamic device for improving the vortex vibration performance of a double-shaped composite beam bridge to solve the problem that the double-shaped composite beam bridge is prone to vortex-induced vibration

Method used

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  • Pneumatic device for improving vortex vibration performance of double-I-shaped superposed beam bridge
  • Pneumatic device for improving vortex vibration performance of double-I-shaped superposed beam bridge
  • Pneumatic device for improving vortex vibration performance of double-I-shaped superposed beam bridge

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Embodiment Construction

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] An embodiment of a pneumatic device for improving the vortex vibration performance of a double I-shaped composite beam bridge of the present invention, such as Figure 1 to Figure 4 Shown: a pneumatic device for improving the vortex vibration performance of a double I-shaped composite beam bridge, comprising two deflectors 1 and a stiffening plate 2 . The two air guide plates 1 are symmetrically arranged on the outer side of th...

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Abstract

The invention relates to the field of bridge engineering and disaster prevention engineering, in particular to a pneumatic device for improving vortex vibration performance of a double-I-shaped superposed beam bridge. Comprising two flow guide plates and a stiffening plate, and the two flow guide plates are arranged on the outer side face of the I-shaped main longitudinal beam in a bilateral symmetry mode; the guide plates are longitudinally arranged along the I-shaped main longitudinal beams; the bottom end of the flow guide plate is flush with a bottom plate of the I-shaped main longitudinal beam, the included angle alpha between the flow guide plate and the bottom plate ranges from 120 degrees to 180 degrees, the length E of the stiffening plate (2) is equal to (0.6-1.2) * D, and D is the width of the flow guide plate. According to the device, formation of vortex at the beam bottom of the superposed beam is fundamentally restrained or weakened, the vortex vibration amplitude of the main beam is reduced, and the driving comfort of the upper portion of the bridge is improved; according to the double-I-shaped composite beam bridge tuyere, the operation safety of a double-I-shaped composite beam bridge structure is guaranteed, meanwhile, the engineering construction difficulty of a traditional double-I-shaped composite beam bridge tuyere is reduced, the tuyere cannot conflict with a maintenance car track during maintenance, cost is reduced, and economical efficiency is higher.

Description

technical field [0001] The invention relates to the fields of bridge engineering and disaster prevention engineering, in particular to a pneumatic device for improving the vortex vibration performance of a double I-shaped composite beam bridge. Background technique [0002] The double I-shaped superimposed beam has been widely used in the design of modern cable-stayed bridges in my country since the 1990s due to its light weight, convenient construction and superior mechanical performance. The vortex shedding around the surface is more obvious and more complicated than that of the fully enclosed streamlined box girder, which makes the vortex-induced vibration response of this type of bridge more significant. Although vortex-induced vibration does not cause destructive damage to bridges like divergent vibrations such as flutter and galloping vibration, the large-scale vortex vibration will affect the driving comfort and accelerate the fatigue of bridge components, thus affecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00
CPCE01D19/00
Inventor 王骑雷伟黄林朱家德王涛王景明
Owner SOUTHWEST JIAOTONG UNIV
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