Wind-resistant enclosure structure of long-span bridge

An envelope structure, large-span technology, used in bridges, bridge parts, bridge construction, etc., can solve problems such as wind load weakening, and achieve the effect of reducing dynamic effects

Pending Publication Date: 2021-10-19
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, the existing technology only solves the problem of the distribution ratio of wind load, but does not really realize the weakening of wind load

Method used

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  • Wind-resistant enclosure structure of long-span bridge
  • Wind-resistant enclosure structure of long-span bridge
  • Wind-resistant enclosure structure of long-span bridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as Figure 1-Figure 4 As shown, a long-span bridge wind-resistant enclosure structure, the wind-resistant enclosure structure uses a regular hexagonal honeycomb wind barrier, through the principle of sudden expansion backflow and hole plug energy dissipation in fluid dynamics, so that the wind energy can be effectively obtained Dissipation, thereby reducing the dynamic effect of wind loads on the train.

Embodiment 2

[0028] A wind-resistant enclosure structure for a long-span bridge adopts a rectangular honeycomb body wind barrier.

Embodiment 3

[0030] A wind-resistant enclosure structure for a long-span bridge adopts an equilateral triangle honeycomb body wind barrier.

[0031] Such as Figure 5-Figure 7 As shown, the working principle of this specific implementation is: when the burst expansion ratio increases, the vortex scale increases. Due to the existence of the vortex, the energy of the mainstream must be consumed. The larger the size and intensity of the vortex, the more energy of the mainstream will be consumed, and the greater the energy loss through sudden expansion will be. The design of multiple sudden expansion structures is an effective structure for forming fluid energy consumption.

[0032] The basic principle of hole plug energy dissipation is to use the sudden contraction and sudden diffusion of airflow in the hole to achieve the purpose of energy dissipation.

[0033] The local friction loss occurs in the local range of the fluid. The sharp change of the section causes the magnitude and direction...

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Abstract

The invention relates to the field of barrier design, and in particular relates to a wind-resistant enclosure structure of a large-span bridge, which adopts a honeycomb wind barrier, and effectively dissipates wind energy through sudden expansion backflow and hole plug energy dissipation principles in fluid dynamics, so that the dynamic effect of wind load on a train is reduced. The current situation that an original wind barrier does not reduce the total influence of wind energy and only distributes the proportion of wind acting on the bridge or the train is changed. According to the wind-resistant enclosure structure, dissipation of wind load energy is truly achieved, the honeycomb-shaped structure is adopted, and the influence of the wind barrier on the aerodynamic performance of the bridge is reduced through almost 100% of the aperture ratio; meanwhile, hexagonal hole channels enable wind energy to be effectively dissipated through sudden expansion backflow and hole plug energy dissipation principles in fluid dynamics, and therefore the dynamic effect of wind load on the train is reduced.

Description

technical field [0001] The invention relates to the field of barrier design, in particular to a wind-resistant enclosure structure for a long-span bridge. Background technique [0002] A bridge built in a windy area or a strong wind area will generate strong vibrations when it is disturbed by the wind, which will not only affect the vibration characteristics of the train running on the bridge, but also the increased wind load of the bridge itself and the lateral force transmitted from the train to the bridge. The force also makes the lateral force of the bridge significantly increased. When the train runs on the bridge, the wind load on the entire girder not only changes dynamically with the running of the train, but also the dynamic distribution of the train mass along the bridge span will also change the vibration characteristics of the bridge structure. In addition, the wind acts on the structure and is also affected by the movement of the structure. [0003] In some sp...

Claims

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Application Information

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IPC IPC(8): E01D19/00E01F7/02
CPCE01D19/00E01F7/025
Inventor 陈铁胡晓娟
Owner SHIJIAZHUANG TIEDAO UNIV
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