KR20130019751A - Steel pipe girder and manufacturing method of it - Google Patents
Steel pipe girder and manufacturing method of it Download PDFInfo
- Publication number
- KR20130019751A KR20130019751A KR1020110081907A KR20110081907A KR20130019751A KR 20130019751 A KR20130019751 A KR 20130019751A KR 1020110081907 A KR1020110081907 A KR 1020110081907A KR 20110081907 A KR20110081907 A KR 20110081907A KR 20130019751 A KR20130019751 A KR 20130019751A
- Authority
- KR
- South Korea
- Prior art keywords
- steel pipe
- plate
- manufacturing
- girder
- thick
- Prior art date
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The present invention relates to a steel pipe girder and a method for manufacturing the same, which can be manufactured at a light weight and can be reinforced with a simple structure. When the plate is rolled, the thin part and the rear part are alternately formed, but the plate rolling step of forming a pair of thin part and the rear part, the rolled plate member so that the cross section is circular to position both ends of the plate to be close to each other Characterized in the manufacturing method consisting of the steps of the step of making and the step of completing the steel pipe by welding both ends of the plate.
Description
The present invention relates to a steel pipe girder and a manufacturing method thereof, and more particularly, to a steel pipe girder and a method for manufacturing the steel pipe girder to strengthen the rigidity of the lightweight by forming the upper and lower parts of the steel pipe thicker than the thickness of both sides.
In general, the girder is a bridge element that transfers the load acting on the upper portion of the bridge to the lower piers, steel girders made of beam-shaped steel and concrete girders made by placing concrete have been mainly used. There is a steel pipe girder using a steel pipe having a circular cross section (for example, Republic of Korea Patent Publication No. 10-0666704) (2007.1.9.) Has increased its use due to the ease of manufacture and excellence of aesthetics. It's happening.
However, the steel pipe girders have a problem in that resistance to rigidity (rigidity and compression) or rigidity is weak.
In order to solve this problem, concrete-filled steel pipe girders filled with concrete inside the steel pipe girders have been developed and used, but this has resulted in another problem that the self load of the girders is increased due to the characteristics of the concrete used.
It is an object of the present invention to provide a steel pipe girders and a method of manufacturing the same to be able to reinforce rigidity with a simple structure while being able to produce light weight.
In addition, an object of the present invention is to provide a steel pipe girders and a method of manufacturing a wide range of applications by having a rigid enough to be easily transformed into various forms through bending and the like.
In addition, an object of the present invention is to provide a steel pipe girders and a method of manufacturing the same that can be easily manufactured in a simple process.
As a means for solving the problems as described above, the steel pipe girders of the present invention,
The cross section is circular,
It is characterized in that the rear portion is provided with a thicker thickness than the upper and lower portions on the cross section.
And both ends of the rear portion is characterized in that the transition portion is reduced to the outside to be the same as the thickness of both sides.
And the rear portion located between the transition portion is characterized in that the thickness is constant.
And the radius of curvature of the outer diameter of the steel pipe girder is characterized in that the same throughout the entire circumference.
In addition, the present invention is a method of manufacturing a steel pipe girder,
Preparing a pair of thin plates and thick plates, and alternately welding the ends of the thin plates and thick plates to produce a single plate,
Rolling up the plate so that the cross section is circular and positioning both ends of the plate so as to be close to each other; and
It characterized by consisting of the steps of the step of completing the steel pipe by welding both ends of the plate.
And in the step of preparing a pair of thin plate and the thick plate and welding the ends by alternately thin plate and thick plate to produce a single plate material,
Transition portions are formed at both ends of the prepared thick plate before welding the end by alternating the thin plate and the thick plate.
Through the problem solving means as described above, the present invention can reinforce the stiffness of the girder with a lightweight and simple structure, and is also easy to manufacture by transforming the girder into various forms through bending, etc., wide application field, The advantage is that steel pipe girders can be manufactured in a simple and easy process.
1 is a perspective view showing a steel pipe girder according to the present invention.
2 is a cross-sectional view showing a steel pipe girder according to the present invention.
3 is a view showing a manufacturing process of the steel pipe girder according to the present invention.
Figure 4 is a flow chart showing a steel pipe manufacturing method according to the present invention.
Preferred embodiments of the steel pipe girder according to the present invention will be described in detail with reference to the accompanying drawings.
1 is a perspective view showing a steel pipe girder according to the present invention, Figure 2 is a cross-sectional view showing a steel pipe girder according to the present invention, Figure 3 is a view showing a manufacturing process of the steel pipe girder according to the present invention, Figure 4 Is a flow chart illustrating a steel pipe manufacturing method according to the present invention.
As shown in Figure 1, the steel pipe girders according to the present invention is a steel pipe having a circular cross-section, the rear portion (1, 1 ') having a relatively thick thickness compared to both sides in the upper and lower portions on the cross-section, respectively.
That is, in the cross section, the thick
Through this, the steel pipe girders according to the present invention has a larger cross-sectional secondary moment value than the conventional steel pipe girders having a constant thickness, so that the rigidity is increased, which can reduce the material of the steel pipe girders to obtain the same rigidity, so that the steel pipe girders It is possible to configure the lightweight.
In addition, both ends of the
At this time, it is preferable that the
In the present invention, in forming the rear portion (1, 1 ') in the steel pipe girder as described above, the radius of curvature of the outer diameter of the steel pipe girder is the same over the entire outer circumference, thereby excellence of the aesthetics of the steel pipe girder of the prior art It is preferable to maintain the advantages, such as, and to prevent the strength of the steel pipe from being weakened by stress concentration due to a step that may be formed on the outer circumferential surface.
Hereinafter, an embodiment of a method for manufacturing a steel pipe girder according to the present invention configured as described above will be described in detail.
Figure 4 is a flow chart showing an embodiment of a steel pipe manufacturing method according to the present invention.
As shown in FIG. 4, first, a pair of thin plates and a thick plate are prepared (thin plate and thick plate preparation step, S1).
As shown in a of FIG. 3, the prepared thin plates and the thick plates are alternately positioned, and then welded to each end to obtain a single sheet disposed sequentially in the thick plates, thin plates, thick plates, and thin plates (thin plate and thick plate welding step). , S2).
Thereafter, as shown in b of FIG. 3, both ends are positioned to be close to each other through a tubing operation in which a single plate formed by welding is rolled so as to have a circular cross section (tubing step, S3).
As described above, in the present invention, it is possible to solve various manufacturing difficulties caused by welding after the parts of the
Then, as shown in Figure 3c, by welding both ends of the plate to complete the steel pipe (finishing welding step, S4).
Between the step of preparing a pair of thin plate and the thick plate, and the step of alternately welding the prepared plate and the thin plate to obtain a single plate material to form a transition portion (3) at both ends of the thick plate toward both ends It is preferable that the transition portion forming step is further provided.
1, 1 ':
3: transition
Claims (6)
Characterized in that the rear portion is provided thicker than both sides in the upper and lower sections on the cross-section
Steel pipe girder
Both ends of the rear portion is provided with a transition portion is reduced in thickness toward the outside to be equal to the thickness of both sides
Steel pipe girder
The rear portion located between the transition portions is characterized in that the thickness is constant
Steel pipe girder
The radius of curvature of the outer diameter of the steel pipe girder is the same over the entire outer circumference
Steel pipe girder
Preparing a pair of thin plates and thick plates, and alternately welding the ends of the thin plates and thick plates to produce a single plate,
Rolling up the plate so that the cross section is circular and positioning both ends of the plate so as to be close to each other; and
Characterized in that the order of the step of completing the steel pipe by welding both ends of the sheet material
Manufacturing method of steel pipe girders
In the step of preparing a pair of thin plate and the thick plate and welding the ends by alternately thin plate and thick plate, to produce a single plate material,
Transition portions are formed at both ends of the prepared thick plate before welding the ends by alternating the thin plate and the thick plate.
Manufacturing method of steel pipe girders
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110081907A KR20130019751A (en) | 2011-08-17 | 2011-08-17 | Steel pipe girder and manufacturing method of it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110081907A KR20130019751A (en) | 2011-08-17 | 2011-08-17 | Steel pipe girder and manufacturing method of it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20130019751A true KR20130019751A (en) | 2013-02-27 |
Family
ID=47897807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020110081907A KR20130019751A (en) | 2011-08-17 | 2011-08-17 | Steel pipe girder and manufacturing method of it |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20130019751A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102087014B1 (en) | 2019-08-20 | 2020-03-10 | 장문혁 | Non-uniform steel pipe girder manufacturing method |
| KR102299937B1 (en) * | 2021-04-08 | 2021-09-10 | 텔루스엔지니어링 주식회사 | Reinforced girder and bridge using the same |
-
2011
- 2011-08-17 KR KR1020110081907A patent/KR20130019751A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102087014B1 (en) | 2019-08-20 | 2020-03-10 | 장문혁 | Non-uniform steel pipe girder manufacturing method |
| KR102299937B1 (en) * | 2021-04-08 | 2021-09-10 | 텔루스엔지니어링 주식회사 | Reinforced girder and bridge using the same |
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| E902 | Notification of reason for refusal | ||
| E601 | Decision to refuse application |