CN222757786U - A low wind resistance double box girder quayside bridge girder cross-section structure - Google Patents
A low wind resistance double box girder quayside bridge girder cross-section structure Download PDFInfo
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- CN222757786U CN222757786U CN202421607126.0U CN202421607126U CN222757786U CN 222757786 U CN222757786 U CN 222757786U CN 202421607126 U CN202421607126 U CN 202421607126U CN 222757786 U CN222757786 U CN 222757786U
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Abstract
The utility model discloses a low-wind-resistance double-box girder bridge girder section structure which comprises a double-box girder bridge girder section, wherein the lower half section of an outer side web of the double-box girder bridge girder section is arranged as an inward bending section, an included angle alpha is formed between the upper end of the inward bending section and the outer side web, an included angle beta is formed between the upper end of the inward bending section and a bottom plate of the double-box girder bridge girder section, and the included angle alpha and the included angle beta are acute angles. The utility model can simultaneously reduce the wind power coefficient in the running direction of the cart and the running direction of the trolley.
Description
Technical Field
The utility model relates to a double-box girder section technology of a quay container crane, in particular to a double-box girder quay bridge section structure with low wind resistance.
Background
Typically, the outside secondary panels of a double girder section quay container crane are vertical, as indicated by the arrow in fig. 1. When the wind blows in the running direction of the cart in the horizontal state of the girder, the windward area is larger, and the deformation of the front girder is larger, so that the operation comfort is affected. In addition, under the state that the girder is lifted, the machine room is generally arranged on the land side of the upper cross beam on the land side, so that the gravity center of the whole machine deviates from the land side track, and when wind in the running direction of the trolley blows from the sea side to the land side, the stability of the whole machine is reduced due to wider flange plates at the bottom of the girder and larger windward area, and the tension of the wind-proof inhaul cable on the sea side is increased.
Disclosure of utility model
Aiming at the defects in the prior art, the utility model aims to provide a cross section structure of a double-box girder shore bridge girder with low wind resistance, which can simultaneously reduce the wind power coefficient in the running direction of a cart and in the running direction of a trolley.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
A cross section structure of a double-box girder shore bridge with low wind resistance comprises a cross section of the double-box girder shore bridge;
The lower half section of the outer web plate of the cross section of the double-box girder shore bridge is provided with an inward bending section;
An included angle alpha is formed between the upper end of the inward bending section and the outer web plate;
An included angle beta is formed between the upper end of the inward bending section and the bottom plate of the cross section of the double-box girder shore bridge;
The included angle alpha and the included angle beta are acute angles.
Preferably, the included angle α and the included angle β are not greater than 60 °.
Preferably, the vertical height H between the upper end of the inward bending section and the lower end of the inward bending section is not more than 1/2 of the height of the outer web.
According to the double-box girder shore bridge girder cross-section structure with low wind resistance, the outer side web plate is designed into a mode that the lower end is bent inwards, so that the wind power coefficient in the running direction of a cart can be reduced, and the wind power coefficient (girder elevation state) in the running direction of a cart can also be reduced. Therefore, when wind blows in the running direction of the cart in the horizontal state of the girder, the outer web is bent inwards, so that the wind power coefficient is reduced, and the deformation of the front girder is reduced. In addition, when the wind in the running direction of the trolley blows from the sea side to the land side in the elevation state of the girder, the outer side of the flange plate at the bottom of the girder is bent upwards, so that the wind power coefficient is reduced, the stability of the whole machine is improved when the trolley runs Fang Xiangfeng from the sea side to Liu Cechui, and the tension of the sea-side windproof guy cable can be reduced.
Drawings
FIG. 1 is a schematic illustration of a cross-sectional structure of a double box girder shore bridge;
fig. 2 is a schematic diagram of a cross-sectional structure of a double box girder shore bridge girder of the present utility model.
Detailed Description
In order to better understand the above technical solution of the present utility model, the technical solution of the present utility model is further described below with reference to the accompanying drawings and examples.
With reference to fig. 2, the cross section structure of the double-box girder shore bridge with low wind resistance provided by the utility model comprises a cross section of the double-box girder shore bridge;
The lower half section of the outer web plate 1 of the cross section of the double-box girder shore bridge is arranged to be an inward bending section, so that the wind power coefficient of the running direction of the cart and the running direction of the trolley can be reduced simultaneously.
An included angle alpha is formed between the upper end of the inward bending section and the outer web plate;
An included angle beta is formed between the upper end of the inward bending section and the bottom plate of the cross section of the double-box girder shore bridge;
The included angle alpha and the included angle beta are acute angles.
The wind coefficient can be reduced by 0.005 and at most by 0.3 when the included angle alpha or the included angle beta inclines by 1 DEG, so that the included angle alpha and/or the included angle beta is not more than 60 deg.
The height is determined according to the section attribute requirement and the construction requirement, and the vertical height H between the upper end of the inward bending section and the lower end of the inward bending section is not more than 1/2 of the height of the outer web plate 1.
The cross section structure of the double-box girder shore bridge can be adjusted according to the requirements. The girder section in the bending form can be used not only on a shore container crane, but also in a steel structure of other machines with similar sections, such as a ship unloader.
It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the utility model, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the utility model as long as they fall within the true spirit of the utility model.
Claims (3)
1. The utility model provides a two case roof beam shoreside bridge girder cross-section structures of low windage, includes two case roof beam shoreside bridge girder cross-sections, its characterized in that:
The lower half section of the outer web plate of the cross section of the double-box girder shore bridge is provided with an inward bending section;
An included angle alpha is formed between the upper end of the inward bending section and the outer web plate;
An included angle beta is formed between the upper end of the inward bending section and the bottom plate of the cross section of the double-box girder shore bridge;
The included angle alpha and the included angle beta are acute angles.
2. The cross-sectional structure of a low-windage double-girder shore bridge according to claim 1, wherein the included angle alpha and the included angle beta are not more than 60 degrees.
3. The double girder cross-sectional structure of a shore bridge with low wind resistance according to claim 1, wherein a vertical height H between an upper end of said inward bending section and a lower end of said inward bending section is not more than 1/2 of a height of said outer web.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421607126.0U CN222757786U (en) | 2024-07-09 | 2024-07-09 | A low wind resistance double box girder quayside bridge girder cross-section structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421607126.0U CN222757786U (en) | 2024-07-09 | 2024-07-09 | A low wind resistance double box girder quayside bridge girder cross-section structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222757786U true CN222757786U (en) | 2025-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421607126.0U Active CN222757786U (en) | 2024-07-09 | 2024-07-09 | A low wind resistance double box girder quayside bridge girder cross-section structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222757786U (en) |
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2024
- 2024-07-09 CN CN202421607126.0U patent/CN222757786U/en active Active
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