KR20100063538A - Concrete filled tube girder reinforced with steel wire and manufacturing method of the same - Google Patents

Concrete filled tube girder reinforced with steel wire and manufacturing method of the same Download PDF

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Publication number
KR20100063538A
KR20100063538A KR1020080122098A KR20080122098A KR20100063538A KR 20100063538 A KR20100063538 A KR 20100063538A KR 1020080122098 A KR1020080122098 A KR 1020080122098A KR 20080122098 A KR20080122098 A KR 20080122098A KR 20100063538 A KR20100063538 A KR 20100063538A
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KR
South Korea
Prior art keywords
steel pipe
concrete
tension
filled
concrete filled
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Application number
KR1020080122098A
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Korean (ko)
Inventor
강재윤
구현본
김병석
이정우
진원종
최은석
Original Assignee
한국건설기술연구원
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Application filed by 한국건설기술연구원 filed Critical 한국건설기술연구원
Priority to KR1020080122098A priority Critical patent/KR20100063538A/en
Publication of KR20100063538A publication Critical patent/KR20100063538A/en

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2/00Bridges characterised by the cross-section of their bearing spanning structure
    • E01D2/04Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • E01D2101/268Composite concrete-metal

Abstract

PURPOSE: A concrete filled steel pipe girder and a manufacturing method thereof are provided to increase the adhesive force between a steel pipe and concrete. CONSTITUTION: A concrete filled steel tube girder in which a bending proof stress is reinforced for tendon comprises a steel pipe(10), partitions, a tension member(30), and a concrete(40). The separator plate is installed in both end parts inner surface of the steel pipe. The tension member is installed between the partitions. The tension member is welded after strain in the steel pipe. The concrete is filled with the inner steel tube between the partitions.

Description

Concrete Filled Tube Girder Reinforced with Steel wire and Manufacturing Method of the Same}
The present invention relates to a concrete-filled steel pipe, and more particularly to a concrete-filled steel pipe girders and a method of manufacturing the reinforced steel pipe-concrete adhesion and bending strength as a tension material introduced tension.
Concrete Filled Steel Tube (CFT) is a structural member that can improve the deformation performance, rigidity and strength of the member due to the mutual binding effect between the steel pipe and the filling material by filling the concrete material inside the steel pipe. Concrete fillers act to suppress sudden local buckling deformation of steel pipes, and steel pipes play a complementary role between materials, such as improving the material strength of fillers through restraint effects on fillers.
Concrete filled steel pipe was developed for the purpose of increasing the strength and ductility of pillar members whose axial compressive force acts as the main load.However, it has excellent strength, excellent deformation performance (ductility), noise and vibration suppression effect. Focusing on the merits, it has begun to find ways to use it as a bridge girder, and compared with a single steel pipe structure or RC structure of the same section, it is possible to obtain excellent mechanical effects such as increased strength, improved deformation capacity, and increased rigidity.
However, the current design standards for concrete filled steel pipe members are mostly design codes for axial compression members of building structures, and the application of concrete filled steel pipe members to civil engineering structures is based on the reinforcement of steel sheets for reinforcement of existing concrete piers. Recently, research has been started on the applicability as a girder as a bending member.
The problem to be solved by the present invention is to provide a concrete filled steel pipe girders that can easily reinforce the flexural strength when applying the concrete filled steel pipe as a bending member, and can also increase the adhesion between the steel pipe and the concrete.
According to a preferred embodiment of the present invention, a steel pipe, a partition plate installed on the inner surface of both ends of the steel pipe, a plurality of tension members are installed between the partition wall and introduced into the steel pipe between the partition plate and the partition plate is characterized in that the concrete is filled The tension filled member is provided with concrete filled steel pipe girders reinforced with flexural strength.
According to another embodiment of the present invention, the partition plate is installed in a steel pipe using a plurality of angles and the angle is removed after curing the concrete so that the partition plate is movable when tensioning the tension member and welded to the steel pipe after tension.
According to another suitable embodiment of the present invention, the method comprises the steps of preparing a steel pipe, temporarily fixing the partition plate at each end of the steel pipe using an angle, arranging a plurality of tension members between the partition plate, the steel pipe between the partition plate Bending strength is reinforced with tension material, comprising the steps of filling and curing concrete therein, removing the angle after concrete curing and tensioning the tension material, and fixing the partition plate to the steel pipe after the tension is completed. Provided are methods of making concrete filled steel tube girders.
According to the present invention, by fixing the partition plate temporarily inside the steel pipe and tensioning the pre-installed tension member in the state in which the partition plate is movable after the concrete is cured, the adhesion between the steel pipe and the concrete by the expansion of the concrete is improved and the bending of the concrete-filled steel pipe It can increase the strength.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same components or parts are denoted by the same reference numerals as much as possible, and detailed descriptions of related known functions or configurations are omitted.
1 is a partial cutaway perspective view showing a concrete filled steel girder reinforced with flexural strength with a steel bar according to an embodiment of the present invention.
Referring to FIG. 1, the concrete filled steel pipe girder according to the present invention includes a steel pipe 10, two partition plates 21 and 22 temporarily fixed to the inside of the steel pipe 10, and a partition plate 21 and 22. It is composed of a concrete 40 is filled in the steel pipe 10 between the plurality of tension members 30 and the partition plate 21, 22 which is installed between and introduced into the tension force in the future.
Square steel pipe may be used as the steel pipe 10, but it is advantageous to use the circular steel pipe shown. The reason is that circular steel pipe is isotropic, so it has better seismic resistance and deformation capacity than square steel pipe, so it has great seismic resistance, high strength, high ductility, and large energy absorption capacity.
The partition plates 21 and 22 are respectively installed at both ends of the inner side of the steel pipe 10 using angles. That is, the partition plate (21, 22) is fixed to the steel pipe (10) to be movable after the concrete is cured before tensioning the tension material. As shown in Fig. 1, a nut n is formed on the inner surface of the partition plates 21 and 22 in correspondence with the holes formed in the partition plates 21 and 22 at the position where the tension member 30 is to be installed. It is welded, and the partition boards 21 and 22 can be fixed using the bolt b against the angle 15. The other part of the angle 15 is bolted to the steel pipe 10. In this state, after the concrete filled between the partition plates 21 and 22 is sufficiently cured, the partition plate is free to move by removing the angle by loosening the bolt before tensioning the tension member. After the tension is completed, the partition plate is welded to the steel pipe. Therefore, the partition plate 21 and 22 act as a pressure plate for compressing the concrete filled therebetween when the tension member is tensioned, and at the same time, it is fixed by welding to function as an internal diaphragm to separate the steel pipe 10 from the concrete 40. To prevent it. The partition plates 21 and 22 have holes 211 formed therein so that the tension member 30 can be inserted therein. The number of holes 211 is determined by the number of tension members 30 necessary for bending reinforcement, and at least one hole is formed.
The tension member 30 is installed between the partition plates 21 and 22 and embedded in the concrete 40 to reinforce the bending strength of the filled steel pipe. The number of installation of the tension member 30 is determined by structural calculation in consideration of the diameter of the steel pipe 10. The tension member 30 may be selected from any tension member known in the art. For example, it may be selected from PS steel wire, PS steel wire, and PS steel bar. The method of fixing the end portion to the partition plate may be selected from known fixing methods depending on the type of tension member. An example of the fixing method is a method of fixing with a wedge using frictional resistance. Tension is introduced into the tension member after the concrete filled between the partition plates is fully cured.
The concrete 40 is filled between the partition plates 21 and 22. As the concrete 40, the expanded concrete can be used to be filled in the steel pipe to increase the strength of the steel pipe, and can be expected to improve the composite effect with the steel pipe by the expansion pressure.
As described above, in the present invention, by installing the partition plates 21 and 22 in the interior of the steel pipe 10 and filling and curing the concrete, the tension member 30 is introduced into the steel pipe 10 without increasing the diameter or increasing the thickness of the steel pipe. It can improve the bending strength of concrete filled steel pipe. In addition, by allowing the partition plate to move freely before introducing the tension force, the tension force is not directly transferred to the steel pipe but directly transferred to the concrete, thereby increasing the adhesion between the steel pipe and the concrete by filling expansion.
3A to 3D are perspective views sequentially illustrating a manufacturing process of a concrete-filled steel pipe girder reinforced with flexural strength according to an embodiment of the present invention.
First, as shown in FIG. 3A, the two end partition plates 21 and 22 are bolted to the steel pipe 10 using an angle 15 to fix the position thereof. Next, as shown in FIG. 3B, a plurality of tension members 30 are disposed between the partition plates 21 and 22. Next, as shown in FIG. 3C, the concrete 40 is filled and cured between the partition plates 21 and 22. Finally, as shown in FIG. 3D, after the concrete 40 is sufficiently cured, the angle 15 is removed, the tension member 30 is tensioned, and the partition plates 21 and 22 are fixed by welding to the steel pipe 10. do.
Although the present invention has been described with reference to the drawings exemplified above, the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. Can be.
The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
1 is a partial cutaway perspective view showing a concrete filled steel girder reinforced with flexural strength with a steel bar according to an embodiment of the present invention.
2 is a partial cutaway perspective view showing a modified example of a concrete filled steel pipe girder reinforced with flexural strength with a steel rod according to an embodiment of the present invention.
3A to 3C are perspective views sequentially illustrating a manufacturing process of a concrete-filled steel pipe girder reinforced with flexural strength with a steel rod according to an embodiment of the present invention.

Claims (3)

  1. Steel Pipe,
    Partition plates installed on the inner surface of both ends of the steel pipe,
    A plurality of tension members, which are installed between the bulkhead plates and introduce tension
    Concrete filled steel pipe girders reinforced with flexural strength, characterized in that it comprises concrete filled in the steel pipe between the partition plate.
  2. The method according to claim 1,
    The bulkhead plate is installed in the steel pipe using a plurality of angles, and after the concrete curing, the angle is removed so that the bulkhead plate is movable when the tension member is tensioned, and after the tension, the concrete filled steel pipe reinforced with bending strength is characterized by being fixed to the steel pipe. Girder.
  3. Preparing the steel pipe,
    Temporarily fixing the partition plate at each end of the steel pipe using an angle,
    Disposing a plurality of tension members between the partition plates,
    Filling and curing concrete inside the steel pipe between the partition plates,
    Removing concrete and curing tension material after curing of concrete and
    After the tension is completed, the method of manufacturing a concrete filled steel pipe girders reinforced with bending strength, characterized in that it comprises the step of welding fixing the partition plate to the steel pipe.
KR1020080122098A 2008-12-03 2008-12-03 Concrete filled tube girder reinforced with steel wire and manufacturing method of the same KR20100063538A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080122098A KR20100063538A (en) 2008-12-03 2008-12-03 Concrete filled tube girder reinforced with steel wire and manufacturing method of the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080122098A KR20100063538A (en) 2008-12-03 2008-12-03 Concrete filled tube girder reinforced with steel wire and manufacturing method of the same

Publications (1)

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KR20100063538A true KR20100063538A (en) 2010-06-11

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101315168B1 (en) * 2013-06-24 2013-10-07 이우연 Composite steel girder with variable section for bridge
KR101328271B1 (en) * 2011-09-16 2013-11-14 주식회사 디에스글로벌이엔씨 Method of constructing prestressed girder using segmented girder, prestressed girder using same and bridge using same
KR101380910B1 (en) * 2011-08-23 2014-04-02 주식회사 세진에스씨엠 Bending preventing steel frame structure
KR101486876B1 (en) * 2014-02-18 2015-01-29 주식회사 하이텍코리아 Pier structure of bridge and construction method thereof
US10167623B2 (en) * 2016-04-11 2019-01-01 Qingdao university of technology Prefabricated reinforced concrete-filled steel pipe sleeve joint

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101380910B1 (en) * 2011-08-23 2014-04-02 주식회사 세진에스씨엠 Bending preventing steel frame structure
KR101328271B1 (en) * 2011-09-16 2013-11-14 주식회사 디에스글로벌이엔씨 Method of constructing prestressed girder using segmented girder, prestressed girder using same and bridge using same
KR101315168B1 (en) * 2013-06-24 2013-10-07 이우연 Composite steel girder with variable section for bridge
KR101486876B1 (en) * 2014-02-18 2015-01-29 주식회사 하이텍코리아 Pier structure of bridge and construction method thereof
US10167623B2 (en) * 2016-04-11 2019-01-01 Qingdao university of technology Prefabricated reinforced concrete-filled steel pipe sleeve joint

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