KR101581892B1 - Concrete Filled Tube Reinforced with Tension Structure and Method for Constructing the Same - Google Patents
Concrete Filled Tube Reinforced with Tension Structure and Method for Constructing the Same Download PDFInfo
- Publication number
- KR101581892B1 KR101581892B1 KR1020150085825A KR20150085825A KR101581892B1 KR 101581892 B1 KR101581892 B1 KR 101581892B1 KR 1020150085825 A KR1020150085825 A KR 1020150085825A KR 20150085825 A KR20150085825 A KR 20150085825A KR 101581892 B1 KR101581892 B1 KR 101581892B1
- Authority
- KR
- South Korea
- Prior art keywords
- concrete
- steel pipe
- tensile
- steel wire
- base
- Prior art date
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 100
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 176
- 239000010959 steel Substances 0.000 claims abstract description 176
- 230000003014 reinforcing Effects 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 7
- 230000001808 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000011150 reinforced concrete Substances 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 10
- 230000000149 penetrating Effects 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 4
- 239000003351 stiffener Substances 0.000 description 3
- 230000000875 corresponding Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000452 restraining Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
Abstract
Description
The present invention relates to concrete filled steel pipe columns, and more particularly, to a concrete filled steel pipe column which is filled with concrete at a predetermined height inside a steel pipe at a lower portion of a column to cure the steel pipe, Reinforced concrete-filled steel pipe columns with increased stiffness and a construction method thereof.
Concrete Filled Steel Tube (CFT) is a concrete structure filled with concrete in a round or polygonal steel pipe, which reinforces the concrete by restraining the steel pipe. The concrete filled steel pipe is used for the column in the frame, Is called a concrete filled steel pipe column. Concrete filled steel pipe columns are structurally stable such as stiffness, proof and deformation, and have excellent advantages in refractoriness, construction, and cost, and various studies are being conducted to apply them to the field.
On the other hand, since bridge piers or columns of buildings are subjected to large moments at the lower part, if the entire column is made into a concrete filled steel pipe, material waste will occur. Therefore, only the lower part of the column can be filled with concrete to form a concrete filled steel pipe column .
In this case, when the bottom of the column is filled with concrete to form a concrete filled steel pipe, the strength of the column increases in proportion to the amount of concrete to be filled. Therefore, in order to secure sufficient strength at the bottom, It should be more than a certain amount.
Accordingly, there is a demand for a method of reducing the construction cost and providing a stable bearing capacity by increasing the rigidity of the column while reducing the amount of concrete filled in the steel pipe.
It is an object of the present invention to provide a method of manufacturing a steel pipe in which a fixing port and a tension member are installed in a steel pipe and a tensile force is applied to the tension member to apply a compressive force to the concrete in the steel pipe, And a method of constructing the same.
According to another aspect of the present invention, there is provided a concrete filled steel pipe column comprising: a base which is seated on a ground or a structure; A steel pipe vertically installed on the base; A concrete filled in the lower part of the steel pipe; A tensile steel wire extending upward from the base and embedded in the concrete; A fixture coupled to an upper portion of the tensile steel wire and applying a compressive force to the concrete as the tensile steel wire is tensioned; And tensile force applying means for applying a tensile force to the tensile steel wire on the lower side of the base or on the upper side of the fixing port after the concrete in the steel pipe is cured.
According to the method of the present invention for constructing the concrete filled steel pipe column of the present invention,
(a) installing a tensile steel wire through the base and inside the steel pipe;
(b) attaching an anchorage to an upper end of the tensile steel wire;
(c) casting concrete into the steel pipe; And,
(d) applying a tensile force to the tensile steel wire through the tensile force applying means at the lower side of the base (10) or at the upper side of the fixing hole (50) when the concrete is cured.
The concrete filled steel pipe column (CFT) of the present invention is filled with concrete only at the lower part of the steel pipe, and after the concrete is cured, tensile force is applied to the tensile steel wire and the compressive force is applied to the concrete by the fixture, Thereby increasing the structural strength. Therefore, even if the amount of concrete used is reduced, a large strength can be secured, thereby reducing the construction cost and improving the structural stability.
1 is a longitudinal sectional view showing a concrete filled steel pipe column according to an embodiment of the present invention.
2 is a plan view of the concrete filled steel pipe column of FIG.
3 is a longitudinal sectional view showing a concrete filled steel pipe column according to another embodiment of the present invention.
Figure 4 is a cross-sectional view of the concrete filled steel column of Figure 3;
FIG. 5 is a perspective view illustrating a fixture applied to the concrete filled steel pipe column of FIG. 3. FIG.
6 is a vertical sectional view showing a modification of the concrete filled steel pipe column of FIG. 3;
7 is a longitudinal sectional view showing a concrete filled steel pipe column according to another embodiment of the present invention.
8 is a perspective view illustrating a fixture applied to the concrete filled steel pipe column shown in FIG.
BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.
1 and 2, a tensile-reinforced concrete-filled steel pipe column according to an embodiment of the present invention includes a base 10 that is seated on a ground or a structure, And a tensile steel wire (40) extending upwardly from the base (10) and embedded in the concrete (30), the tensile steel wire (40) A fixture 50 coupled to an upper portion of the tensile steel wire 40 to apply a tensile force to the tensile steel wire 40 and applying a downward compressive force to the concrete 30; And tensile force applying means for applying a tensile force to the tensile steel wire (40) after the wire (30) is cured.
The base 10 is in the form of a flat plate, seated on a ground or building structure and secured by anchor bolts 11. The base 10 is formed with a steel wire installation hole 12 through which the tensile steel wire 40 passes while being vertically penetrated. The steel wire installation hole 12 has a conical shape in which the cross-sectional area increases toward the lower side so as to have a shape and size corresponding to the shape of the lower end of the tensile steel wire 40.
The steel pipe 20 is made of a metal pipe or pipe which is vertically installed on the upper surface of the base 10, and the concrete 30 is filled and filled in the lower part of the pipe. The steel pipe 20 is fixed on the base 10 by welding or the like. In this embodiment, the steel pipe 20 is a rectangular pipe.
An inner steel pipe (25) having a rectangular pipe shape is installed in the steel pipe (20) side by side with the steel pipe (20). The lower end of the inner steel pipe 25 is fixed to the base 10 by welding or the like.
The tensile steel wire 40 is installed such that a lower end of the tensile steel wire 40 is hooked to the base 10 and an upper end of the tensile steel wire 40 passes through a fixing hole 50 provided on the upper surface of the concrete 30. A plurality of the tensile steel wires 40 (two in this embodiment) are provided so as to extend in the vertical direction on both sides of the inside of the steel pipe 20. [ In this embodiment, each of the two tensile steel wires 40 is provided on the outer side of both sides of the inner steel pipe 25, and the tensile force is applied upward by the tensile force applying means.
A thread is formed on the upper end of the tensile steel wire 40 so that the upper nut member 60, which is the tension applying means, is helically engaged.
A hook 42 having a cross-sectional area larger than that of the tensile steel wire 40 is formed at the lower end of the tensile steel wire 40. Here, the engaging portion 42 has a conical shape in which the cross-sectional area increases toward the lower side. The engaging portion 42 is inserted into the steel wire installation hole 12 formed in the base 10 and is firmly supported without being disengaged from the steel wire installation hole 12 when the tensile steel wire 40 receives a tensile force upward .
The fixture 50 has a rectangular flat plate shape having a square opening 50a having a size and shape corresponding to the inner steel pipe 25 at the center thereof and is made of a concrete filled in the steel pipe 20 30, respectively. On both sides of the fixing port 50, a steel wire passage hole 50b through which the tensile steel wire 40 passes is vertically formed. In this embodiment, the fixture 50 is mounted on the upper surface of the concrete 30, but the fixture 50 may be completely embedded in the concrete 30.
The fixing port 50 is fixed to the upper end of the inner steel pipe 25 by welding. Accordingly, when the fixing port 50 is pressed downward, the inner steel pipe 25 is pressed downward together with the concrete 30.
The tension applying means acts to apply a tensile force to the tensile steel wire 40 at the upper end of the tensile steel wire 40 and at the same time press the fixing hole 50 downward. In this embodiment, And is wound on an upper portion of the tensile steel wire 40 at an upper portion of the tensile steel wire 40 so as to be rotated at the upper portion of the tensile steel wire 40 to be tightened against the upper surface of the fixing hole 50, And an upper nut member 60 for pulling upward to apply a tensile force thereto.
The upper nut member 60 is spirally coupled to a thread formed on the upper end of the tensile steel wire 40. When the operator tightens the upper nut member 60 with a hand or a tool, the lower end portion of the upper nut member 60 pushes the upper surface of the fixing port 50 downward, and at the same time, the tensile steel wire 40 is moved upward So that a tensile force is generated.
The tensile force by the upper nut member 60 is applied after the concrete 30 placed in the steel pipe 20 is fully cured and hardened.
As described above, in the present invention, the upper nut member 60 is urged downward by applying a force in the direction of tightening the upper nut member 60 with respect to the tensile steel wire 40, and at the same time, the tensile steel wire 40 receives a tensile force upward . Therefore, the inner steel pipe 25 and the concrete 30 fixed to the fixing port 50 are simultaneously compressed downward, and thus the rigidity of the lower portion of the concrete-filled steel pipe column, which receives a large moment, .
In this embodiment, a concrete filled steel pipe column is constructed by a structure in which the fixing port 50 is formed in a flat plate shape and placed on the upper surface of the concrete 30 in the steel pipe 20. However, as shown in FIGS. The fixture 50 may be completely or partly embedded in the concrete 30 as shown in FIG.
3 to 6, the concrete filled steel pipe column according to the second embodiment of the present invention includes a plurality of tensile steel wires 40 (see FIG. 1) in a single steel pipe 20 without an inner steel pipe 25 And a fixing port 50 is coupled to the upper end of the tensile steel wire 40. The concrete 30 is installed so that the tensile steel wire 40 is completely embedded in the steel pipe 20 Cured structure.
The lower nut member 61 is provided at the lower portion of the base 10 to pull the tensile steel wire 40 downward to generate a tensile force and generate a force for pressing the fixture 50 downward. (40).
In this embodiment, the steel pipe 20 has a circular pipe shape, but may have a rectangular or other polygonal pipe shape.
The upper end of the tensile steel wire 40 is tightly coupled to the fixing hole 50 by a nut 55. When a tensile force is applied to the tensile steel wire 40, The compressive force is applied to the concrete 30 downward.
The lower nut member 61 is connected to the tensile steel wire 40 in a state where the base 10, the steel pipe 20 and the concrete 30 are laid down before the base 10 is seated on the ground or the building structure, So that a tensile force is applied to the tensile steel wire 40.
The fixing port 50 is formed to have a structure capable of applying sufficient compressive force to the concrete 30 while being pulled downward by the tension steel wire 40. In this embodiment, And a reinforcing member 52 extending upward or downward from the engaging plate 51. The reinforcing member 52 is formed of a metal plate,
The coupling plate 51 is formed of a ring-shaped flat plate, but may also be formed of a disk or polygonal flat plate.
The stiffener 52 may have a shape in which a plurality of flat plates intersect with each other in a '+' shape or a '*' shape. In this embodiment, the stiffener 52 includes two flat plates of semi- '+' Type. The reinforcing member 52 may be fixed to the coupling plate 51 by welding or the like. In this embodiment, the reinforcing member 52 is provided on the upper portion of the coupling plate 51, but the reinforcing member 52 may be formed on the lower portion of the coupling plate 51 as shown in FIG.
When the tensile force is applied to the tensile steel wire 40 by being embedded in the concrete 30, the fixture 50 constructed as described above acts to increase the rigidity of the column by applying compressive force to the concrete 30 downward.
In this embodiment, the fixture 50 is completely embedded in the concrete 30, but otherwise only a part of the fixture 50 is embedded in the concrete 30 and the remaining part is exposed to the outside of the upper surface of the concrete 30 Or the entire fixture 50 may be exposed to the outside of the upper surface of the concrete 30 and the fixture 50 may be seated on the upper surface of the concrete 30 to press the concrete 30.
The concrete filled steel pipe column thus constructed may be first built in a factory or other location before installation at the installation location, and then installed at the installation location. The order of construction is as follows.
The tensile steel wire 40 is inserted into the steel pipe 20 through the steel wire installation hole 12 of the base 10 and the fixing hole 50 is connected to the upper end of the tensile steel wire 40. Alternatively, the fixing port 50 may be firstly coupled to the upper end of the tensile steel wire 40 and the lower end of the tensile steel wire 40 may be passed through the steel wire installation hole 12 of the base 10, (20).
When the tensile steel wire 40 and the fixing hole 50 are installed in the steel pipe 20 as described above, the concrete 30 is poured and cured in the steel pipe 20. [ When the concrete 30 is cured and the concrete 30 is cured, the concrete filled steel pipe column is laid down, or the base 10 is separated from the ground surface, and the lower nut, which is joined to the lower end of the tensile steel wire 40, When the member 61 is turned and tightened, tensile force is applied to the tensile steel wire 40 downward, and the fixing port 50 presses the concrete 30 downward.
When the concrete filled steel pipe column is made as described above, the concrete filled steel pipe column is moved to a position where the concrete pipe is to be installed, and the base 10 is placed on the floor or the structure and fixed with the anchor bolts 11 (see FIG.
In the above-described embodiment, the reinforcing member 52 of the fixing unit 50 has a shape in which flat plates having a semicircular ring shape intersect with each other. However, as shown in FIGS. 7 and 8, Quot; + " or " * ".
In order to apply a greater shear compressive force in the axial direction (vertical direction) of the steel pipe 20 when the pressing force is applied to the concrete 30 by the fixing port 50, A plurality of shear connection members 53 may be arranged with an interval in the vertical direction. As the shear connector 53, a bolt or the like may be used.
As described above, the concrete filled steel pipe column (CFT) of the present invention is filled with the concrete 30 only at the lower part of the steel pipe 20, and tensile force is applied to the tensile steel wire 40. At the same time, 30, the structural strength at the bottom of the column can be increased. Therefore, even if the amount of concrete 30 used is reduced, a large strength can be secured, thereby reducing the construction cost and improving the structural stability.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.
10: Base 11: Anchor bolt
12: Steel wire mounting hole 20: Steel pipe
25: inner steel pipe 30: concrete
40: tensile steel wire 42:
50: Fixing hole 50b: Steel wire penetration hole
51: engaging plate 52: stiffener
53: Shear connector
Claims (16)
A steel pipe (20) vertically installed on the base (10);
A concrete 30 filled in the lower portion of the steel pipe 20;
A tensile steel wire (40) extending upward from the base (10) and embedded in the concrete (30);
A fixing port 50 coupled to an upper portion of the tensile steel wire 40 to apply a tensile force to the tensile steel wire 40 so as to apply a downward compressive force to the concrete 30;
And tensile force applying means for applying a tensile force to the tensile steel wire 40 in the vertical direction from the lower side of the base 10 after the concrete 30 in the steel pipe 20 is cured,
The fixture 50 includes a flat plate type coupling plate 51 which is coupled to the upper end of the tensile steel wire 40 and is embedded in the upper portion of the concrete 30 to apply a downward compressive force to the concrete 30, And a reinforcing member 52 extending upward or downward from the coupling plate 51 and embedded in the upper portion of the concrete 30 together with the coupling plate 51,
The reinforcing member 52 has a semi-circular ring shape or a plurality of polygonal flat plates crossing each other in a '+' shape or a '*' shape. Tension reinforced concrete filled steel pipe columns made of.
(a) installing a tensile steel wire (40) through the base (10) and inside the steel pipe (20);
(b) attaching the fixing port (50) to the upper end of the tensile steel wire (40);
(c) casting the concrete (30) in the steel pipe (20); And,
(d) applying a tensile force to the tensile steel wire (40) in a vertical direction through a tensile force applying means at a lower side of the base (10) when the concrete (30) is cured. Construction method of filled steel pipe column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150085825A KR101581892B1 (en) | 2015-06-17 | 2015-06-17 | Concrete Filled Tube Reinforced with Tension Structure and Method for Constructing the Same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150085825A KR101581892B1 (en) | 2015-06-17 | 2015-06-17 | Concrete Filled Tube Reinforced with Tension Structure and Method for Constructing the Same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR101581892B1 true KR101581892B1 (en) | 2015-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150085825A KR101581892B1 (en) | 2015-06-17 | 2015-06-17 | Concrete Filled Tube Reinforced with Tension Structure and Method for Constructing the Same |
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| Country | Link |
|---|---|
| KR (1) | KR101581892B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223540A (en) * | 2016-08-24 | 2016-12-14 | 安徽瑶海钢构建设集团股份有限公司 | A kind of crane steel ladder platform column |
| CN110924291A (en) * | 2019-11-19 | 2020-03-27 | 东北大学 | Prefabricated stiffened concrete-filled steel tube and reinforced concrete assembled pier and construction process |
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|---|---|---|---|---|
| KR100658733B1 (en) | 2004-12-28 | 2006-12-15 | 삼성물산 주식회사 | Joint structure of CFT column and RC flat plate |
| JP4043814B2 (en) * | 2002-03-15 | 2008-02-06 | 高周波熱錬株式会社 | Reinforcing apparatus and reinforcing method for concrete rod-like structure |
| KR100862005B1 (en) | 2007-07-16 | 2008-10-07 | 아주대학교산학협력단 | Manufacturing method of segmental internally confined hollow concrete filled tube |
| KR101136926B1 (en) | 2009-11-04 | 2012-04-20 | 류승일 | Composite beam by prestressed concrete filled tube |
| JP2013060772A (en) * | 2011-09-14 | 2013-04-04 | Taisei Corp | Towering structure |
| KR101281443B1 (en) * | 2013-02-02 | 2013-07-02 | 홍석기 | Street light pole having built-up bottom pole |
| KR101318036B1 (en) * | 2011-12-22 | 2013-10-14 | 쌍용건설 주식회사 | Loading experment device for earthquake resistant performance test of column member considering long-term deformation |
-
2015
- 2015-06-17 KR KR1020150085825A patent/KR101581892B1/en active IP Right Grant
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4043814B2 (en) * | 2002-03-15 | 2008-02-06 | 高周波熱錬株式会社 | Reinforcing apparatus and reinforcing method for concrete rod-like structure |
| KR100658733B1 (en) | 2004-12-28 | 2006-12-15 | 삼성물산 주식회사 | Joint structure of CFT column and RC flat plate |
| KR100862005B1 (en) | 2007-07-16 | 2008-10-07 | 아주대학교산학협력단 | Manufacturing method of segmental internally confined hollow concrete filled tube |
| KR101136926B1 (en) | 2009-11-04 | 2012-04-20 | 류승일 | Composite beam by prestressed concrete filled tube |
| JP2013060772A (en) * | 2011-09-14 | 2013-04-04 | Taisei Corp | Towering structure |
| KR101318036B1 (en) * | 2011-12-22 | 2013-10-14 | 쌍용건설 주식회사 | Loading experment device for earthquake resistant performance test of column member considering long-term deformation |
| KR101281443B1 (en) * | 2013-02-02 | 2013-07-02 | 홍석기 | Street light pole having built-up bottom pole |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223540A (en) * | 2016-08-24 | 2016-12-14 | 安徽瑶海钢构建设集团股份有限公司 | A kind of crane steel ladder platform column |
| CN110924291A (en) * | 2019-11-19 | 2020-03-27 | 东北大学 | Prefabricated stiffened concrete-filled steel tube and reinforced concrete assembled pier and construction process |
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