KR102088917B1 - Assembly Type Steel Tube Having a Reinforcing Member Therein and Construction Method of Concrete Filled Tube Structures Using the Same - Google Patents

Abstract

The present invention is a prefabricated steel pipe used for a concrete filled type (CFT) structure in which unit steel pipe structures are assembled and extended, and concrete is filled therein, wherein the unit steel pipe structure is a reinforcement member on an inner surface. Is coupled, the reinforcing member is formed to extend in the extending direction or the opposite direction of the prefabricated steel pipe to protrude from the unit steel pipe structure, the unit steel pipe structure, the first or second unit steel pipe structure (100, 200), the assembled steel pipe 500 includes first and second unit steel pipe structures 100 and 200, and the reinforcing member 120 of the first unit steel pipe structure 100 includes: The second unit steel pipe structure 200 is inserted inside, and the reinforcing member 220 of the second unit steel pipe structure 200 is formed to be inserted into the first unit steel pipe structure 100, and the first and first 2 unit steel pipe Reinforcing members (120, 220) of the structures (100, 200) are fixed to concrete, and are formed to strengthen the bonding force of the joints of the first and second unit steel pipe structures (100, 200), providing a prefabricated steel pipe do.

Description

Assembly type steel tube having a reinforcing member therein and construction method of concrete filled tube structures using the same}

The present invention relates to a construction method of a prefabricated steel pipe provided with a reinforcing member therein and a concrete-filled structure using the same.

Reinforced concrete structure (RC group), steel structure (S group), steel reinforced concrete structure (SRC group), and concrete filled steel pipe (abbreviated as CFT) structure, which is referred to as a fourth structural system, Recently, research on this has been actively conducted in developed countries such as the United States and Japan, and has been successfully applied to skyscrapers.

CFT structure has high ductility, relatively simple construction, and can increase the bending resistance and compression resistance efficiency of the cross section through the synthesis of steel and concrete, and the pillars and walls of the ultra-high-rise structure system with large compressive load and bending moment Is suitable for

In addition, by using the steel pipe as a formwork, it is possible to omit the formwork construction, and concrete prevents local buckling of the steel pipe, and the steel pipe can constrain the internal concrete, thereby increasing ductility, the greatest weakness of concrete. .

Concretely, concrete is very strong in compressive force, but is vulnerable to tensile force, iron is strong in both tensile and compressive force, but it is vulnerable to local buckling. Structure.

On the other hand, the CTF structure can be applied to the column, and when the length is long due to the characteristics of the column, as in other steel structure methods, most of the columns placed up and down need to be welded or bolted to joint construction.

1 is a perspective view showing a conventional CFT pillar, and FIG. 2 is a perspective view showing a structure in which a CFT pillar shown in FIG. 1 is covered with a leaf plate.

Referring to FIGS. 1 and 2 together, the conventional CFT pillar 10 combines a pair of unit pillars 11 and 12 arranged up and down through a joint construction by welding W as shown in FIG. 1. .

In this case, to secure the strength of the welded joint, as shown in FIG. 2, the top plate 13 is overlaid on the joint portion and then welded to reinforce the entire outer line of the reinforcement plate.

In this way, the conventional CFT column 10 increases the labor cost due to excessive welding, which is a factor of cost increase, and the leaf plate 13 provided for securing the joint strength of the joint is a steel material constituting the unit columns 11 and 12 Since a thicker iron plate has to be applied, there is a problem in that the number of materials increases and the cost increases.

In addition, since the unit pillars 11 and 12 used in the CFT are generally formed to have a thin thickness, there is a problem that the thin steel pipe may be deformed by welding heat during bonding.

Accordingly, in recent years, when constructing a CFT structure, there is a high need for a technology capable of combining unit pillars without the need for on-site welding and increasing structural rigidity of the joints of unit pillars vulnerable to external forces.

(Patent Document 1) KR 10-2012-0056117 A

(Patent Document 2) KR 10-2006-0042561 A

The present invention has been devised to solve the above problems, and specifically, when performing the joining of the unit steel pipe structure, while providing a prefabricated steel pipe that does not require welding work, the joint portion of the unit steel pipe structures vulnerable to external forces It is intended to provide a prefabricated steel pipe with increased structural rigidity.

One embodiment of the present invention for solving the above problems, the unit steel pipe structures are assembled and extended, the prefabricated steel pipe used in a concrete filled type (CFT (Concrete Filled Tube)) structure filled with concrete therein As, the unit steel pipe structure, a reinforcing member is coupled to the inner surface, the reinforcing member is formed to extend in the extending direction or the opposite direction of the prefabricated steel pipe and protrude from the unit steel pipe structure, wherein the unit steel pipe structure is , A first or second unit steel pipe structure (100, 200), the prefabricated steel pipe 500, the first and second unit steel pipe structure (100, 200), the first unit steel pipe structure The reinforcing member 120 of (100) is inserted into the second unit steel pipe structure 200, and the reinforcing member 220 of the second unit steel pipe structure 200 is the first unit steel pipe structure 100 Shovel inward It is formed so as to, the reinforcing members (120, 220) of the first and second unit steel pipe structures (100, 200) is fixed to the concrete, the first and second unit steel pipe structures (100, 200) of the joint It is intended to provide a prefabricated steel pipe formed to strengthen the bonding force.

In addition, the unit steel pipe structures 100 and 200 have a quadrangular pillar shape in which four surfaces are formed, and the reinforcing members 120 and 220 are coupled to the four surfaces by coupling means 140 and 240, respectively. It is formed, it is preferable that the coupling means (140, 240) is formed to be removable from the outside of the assembled steel pipe 500 after curing of the concrete is finished.

In addition, the assembled steel pipe 500, the third unit steel pipe structure 300; Further comprising, the first to third unit steel pipe structure (100, 200, 300) are sequentially stacked, the reinforcing member 220 of the second unit steel pipe structure 200, the first and third It is formed to be inserted into the unit steel pipe structures 100 and 300, and the reinforcing member 320 of the third unit steel pipe structure 300 is preferably formed to be inserted into the second unit steel pipe structure 200. .

In addition, among the reinforcing members 120 and 220, the portions 120a and 220a protruding from the unit steel pipe structures 100 and 200 are hook-shaped bent in the center direction of the cross section of the unit steel pipe structures 100 and 200. desirable.

In addition, it is preferable that the ends of the reinforcing members 120 and 220 have a hook shape bent at 90 degrees or 180 degrees.

On the other hand, an embodiment of the present invention for solving the above problems, using the above-described assembled steel pipe, as a construction method for a concrete-filled structure, (a) the first and second unit steel pipe structure 100 , 200) in the first direction; (b) fixing the first and second unit steel pipe structures 100 and 200 using fixing members 160 and 260 formed on outer surfaces of the first and second unit steel pipe structures 100 and 200 Letting; (c) pouring concrete into the prefabricated steel pipe 500 made of the first and second unit steel pipe structures 100 and 200; (d) curing the concrete; And (e) after curing of the concrete is finished, the reinforcing member (120, 220) and the coupling means (140, 240) for fixing between the unit steel pipe structure (100, 200), the unit steel pipe structure ( 100, 200); It is intended to provide a construction method of a concrete-filled structure comprising a.

The unit steel pipe structure constituting the prefabricated steel pipe according to the present invention includes a reinforcing member, so that structural rigidity and strength can be increased at a joint of the unit steel pipe structures among concrete filled structures.

In addition, since the fixing member is formed on the outer surface of the unit steel pipe structures, in the process of combining the unit steel pipe structures to form the assembled steel pipe, the welding process is unnecessary, so the construction is convenient, and the fixing members are assembled by combining the fixing members. By forming the steel pipe, it is possible to prevent deformation of the unit steel pipe structure due to welding.

1 is a perspective view schematically showing a conventional CFT pillar.
FIG. 2 is a perspective view schematically showing the structure of the CFT pillar shown in FIG. 1 with a leaf plate.
3 is a perspective view schematically showing a state before combining the first and second unit steel pipe structures forming the assembled steel pipe according to the present invention.
4 is a cross-sectional view of a state in which the first and second unit steel pipe structures according to the present invention are combined to form an assembled steel pipe.
5 is a perspective view of a reinforcing member according to the present invention.
6 is a perspective view schematically showing a state before combining the first to third unit steel pipe structures forming the assembled steel pipe according to the present invention.
7 is a flow chart of a method for constructing a concrete-filled structure using an assembled steel pipe according to the present invention.

Hereinafter, the assembled steel pipe according to the present invention will be described in detail with reference to the drawings. Here, the components constituting the present invention may be used integrally or separately used as required. Also, some components may be omitted depending on the type of use. Various modifications are possible in the form of the present invention and the number of components.

Preferred embodiments of the assembled steel pipe according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or practice. Therefore, the definition of these terms should be described based on the contents throughout this specification.

It should be understood that other types of prefabricated steel pipes including all of the components corresponding to one embodiment or other features in this specification may be easily derived.

3 is a perspective view schematically showing a state before combining the first and second unit steel pipe structures to form an assembled steel pipe according to the present invention.

Referring to FIG. 3, the assembled steel pipe 500 is a structure in which unit steel pipe structures are assembled and extended. Specifically, the unit steel pipe structure is composed of first or second unit steel pipe structures 100 and 200. 1 unit steel pipe structure 100 refers to a unit steel pipe structure located at the bottom, and the second unit steel pipe structure 200 refers to a unit steel pipe structure located at the upper side.

At this time, reinforcement members 120 and 220 are coupled to the inner surfaces of the first and second unit steel pipe structures 100 and 200, respectively, and the reinforcement members 120 of the first unit steel pipe structure 100 are assembled steel pipes ( 500) is formed to protrude upward in the extending direction, and the reinforcing member 220 of the second unit steel pipe structure 200 is protruded downward in the direction opposite to the extending direction.

In addition, the reinforcing members 120 and 220 are all coupled to the inner surfaces of the first and second unit steel pipe structures 100 and 200, respectively, and the first and second unit steel pipe structures 100 and 200 are assembled. In, the reinforcing members 120 and 220 are not exposed to the outside, and thus, are formed to settle inside the concrete after pouring and curing the concrete.

Specifically, the reinforcing member 120 of the first unit steel pipe structure 100 is inserted into the second unit steel pipe structure 200, and the reinforcing member 220 of the second unit steel pipe structure 200 is the first The unit steel pipe structure 100 is formed to be inserted inside.

On the other hand, the first and second unit steel pipe structures 100 and 200 have a quadrangular pillar shape in which four surfaces are formed, and the reinforcing members 120 and 220 are respectively attached to four surfaces by means of couplings 140 and 240. It is formed to be coupled, and later the coupling means 140 and 240 may be removable again, and may be coupled through bolting.

In addition, a pair of reinforcing members 120 and 220 are formed on each side, and a total of four pairs of reinforcing members 120 and 220 coupled to the four sides are preferably coupled to the same height of the unit steel pipe structure. Do.

On the other hand, the number of reinforcing members (120, 220) coupled to each surface can be freely adjusted according to the designer's choice or need, and specifies that the heights of the reinforcing members (120, 220) are also changeable.

4 is a cross-sectional view of a state in which the first and second unit steel pipe structures according to the present invention are combined to form an assembled steel pipe.

Referring to FIG. 4, among the reinforcement members 120 and 220, portions 120a and 220a protruding from the joint ends of the unit steel pipe structures 100 and 200 are bent in the center direction of the cross section of the unit steel pipe structures 100 and 200 It is a hook shape, and the ends of the reinforcing members 120 and 220 are hook shapes bent at 180 degrees.

As described above, as the end portions of the reinforcing members 120 and 220 are formed in a hook shape, the end portions of the reinforcing members 120 and 220 can exhibit stronger bonding strength with concrete compared to a plate structure in which the ends are not bent.

Accordingly, when the external force in the transverse direction is applied to the joints of the first and second unit steel pipe structures 100 and 200, the concrete and the second unit steel pipe filled with the external force in the first unit steel pipe structure 100 It can be evenly decomposed in the concrete filled in the structure 200, ultimately, it can reinforce the structural rigidity and strength of the joint.

Meanwhile, fixing members 160 and 260 are formed on outer surfaces of the first and second unit steel pipe structures 100 and 200, respectively, and the fixing members 160 and 260 include first and second unit steel pipe structures 100, 200) are formed at the contacting portions, and are formed at positions corresponding to each other so that the first and second unit steel pipe structures 100 and 200 are fixed. In addition, a fixing member is formed on the outside of the joint where the first to third unit steel pipe structures 100, 200 and 300 contact each other, and the fixing member is the first to third unit steel pipe structures 100, 200 and 300. It is formed to enhance the coupling force of the joint.

As described above, the first and second unit steel pipe structures 100 and 200 are mutually coupled through the fixing members 160 and 260, so that in the process of extending and forming the prefabricated steel pipe 500, the mutual alignment is twisted. The phenomenon can be prevented, and accordingly, it is possible to provide convenience in construction for the operator.

Meanwhile, the fixing members 160 and 260 may be welded to and coupled to the first and second unit steel pipe structures 100 and 200, relative to the sizes of the first and second unit steel pipe structures 100 and 200. By making it small, it is possible to minimize the welding area.

In addition, the fixing members 160 and 260 are coupled by a bolt fastening method, and may be formed of a bracket having a “b” cross-section, and may be formed of other known members, but are not limited thereto.

5 is a perspective view of a reinforcing member according to the present invention, which is coupled to the first unit steel pipe structure 100 and will be described on the premise of the reinforcing member 120.

Referring to FIG. 5, the reinforcing member 120 is composed of a portion 120b inserted inside the first unit steel pipe structure 100 and a portion 120a inserted inside the second unit steel pipe structure 200, The portion 120a inserted into the second unit steel pipe structure 200 is the same as the portion protruding from the first unit steel pipe structure 100. In addition, the reinforcing members 120, 220, and 320 respectively provided in the first to third unit steel pipe structures 100, 200, and 300 are coupled with the inner surfaces of the unit steel pipe structures 120b, 220b, 320b. It is connected to the coupling parts 120b, 220b, 320b coupled to the inner surface of the unit steel pipe structure, and extends in one direction from the coupling parts 120b, 220b, 320b, and one side part connected to the coupling parts 120b, 220b, 320b. Inserted into the steel pipe structure, the distal end spaced apart from the coupling portions 120b, 220b, 320b is the insertion portion 120a, 220a, 320a protruding outward from the unit steel pipe structure, the insertion portion based on one direction or the opposite direction of one direction ( It is formed at the ends of 120a, 220a, 320a), and is formed in a curved shape having a predetermined curvature, and is composed of ends 120c, 220c, 320c, which are hook-shaped curved in the center direction of the horizontal cross section of the unit steel pipe structure.

At this time, the end portion 120c of the portion inserted into the second unit structure 200 has a hook shape that is bent at 90 degrees, and the first unit steel pipe structure 100 is inserted into the portion inserted inside the first unit structure 100. The portion to be coupled to is formed, and the portion to be coupled to the first unit steel pipe structure 100 is formed to have a larger area than other parts for bonding.

6 is a perspective view schematically showing a state before combining the first to third unit steel pipe structures in order to form the assembled steel pipe according to the present invention.

Referring to FIG. 6, the prefabricated steel pipe 500 further includes a third unit steel pipe structure 300, and the first to third unit steel pipe structures 100, 200, and 300 are sequentially stacked.

At this time, the reinforcing member 220 of the second unit steel pipe structure 200 is formed to be inserted into the first and third unit steel pipe structures 100 and 300, and the reinforcing member of the third unit steel pipe structure 300 320 is formed to be inserted into the second unit steel pipe structure 200.

Specifically, the second unit steel pipe structure 200 located in the center among the first to third unit steel pipe structures 100, 200, and 300 includes a reinforcing member 220 extending toward the first unit steel pipe structure 100 and All of the reinforcing members 220 extending toward the third unit steel pipe structure 300 are provided.

7 is a flowchart of a method for constructing a concrete filled type structure using a prefabricated steel pipe according to the present invention.

Referring to FIG. 7, a method of constructing a concrete-filled structure includes stacking the first and second unit steel pipe structures 100 and 200 in the extending direction of the prefabricated steel pipe (S10), and the first and the first Fixing the first and second unit steel pipe structures 100 and 200 by using fixing members 160 and 260 formed on the outer surfaces of the two unit steel pipe structures 100 and 200 (S20), After pouring concrete into the prefabricated steel pipe 500 made of the first and second unit steel pipe structures 100 and 200 (S30), curing the concrete (S40) and curing of the concrete is completed, Step of removing the coupling means (140, 240) fixing between the reinforcement member (120, 220) and the unit steel pipe structure (100, 200) from the outside of the unit steel pipe structure (100, 200) (S50). It includes.

At this time, in step (S50), the part from which the coupling means 140 and 240 have been removed may be supplemented by a separate finishing process to remove the coupling means 140 and 240.

As described above, the present specification has been described with reference to the embodiments shown in the drawings so that those skilled in the art can easily understand and reproduce the present invention, but these are merely exemplary, and those skilled in the art can make various modifications and equivalents from the embodiments of the present invention. It will be understood that embodiments are possible. Therefore, the protection scope of the present invention should be defined by the claims.

10: main root 100: first unit steel pipe structure
200: second unit steel pipe structure 300: third unit steel pipe structure
120, 220, 320: reinforcement member 140, 240: coupling means
160, 260: fixing member

Claims (6)

The unit steel pipe structures are assembled and extended, and as a prefabricated steel pipe used in a concrete filled tube (CFT) structure filled with concrete therein,
The unit steel pipe structure is a quadrangular pillar shape having four surfaces , and a reinforcement member is coupled to the inner surface, and the reinforcement members are coupled to the four surfaces,
The reinforcing member is formed to extend in the extending direction or the opposite direction of the assembled steel pipe and protrude from the unit steel pipe structure,
The unit steel pipe structure includes first to third unit steel pipe structures 100, 200, and 300,
The assembled steel pipe 500 includes the first to third unit steel pipe structures 100, 200, and 300, in which the first to third unit steel pipe structures 100, 200, and 300 are vertically ordered. Stacked with
Reinforcing members (120, 220, 320) provided on the first to third unit steel pipe structures (100, 200, 300), respectively,
Coupling units (120b, 220b, 320b) coupled to the inner surface of the unit steel pipe structure;
It is connected to the coupling parts 120b, 220b, 320b coupled to the inner surface of the unit steel pipe structure, and extends in one direction from the coupling parts 120b, 220b, 320b, respectively, and is connected to the coupling parts 120b, 220b, 320b. One side portion is inserted into the unit steel pipe structure, the end portion spaced apart from the coupling portion (120b, 220b, 320b) is an insertion portion (120a, 220a, 320a) protruding out of the unit steel pipe structure; And
It is formed at the end of the insertion portion (120a, 220a, 320a) based on the one direction or the opposite direction of the one direction, is formed in a curved shape having a predetermined curvature hook hook in the center direction of the horizontal cross-section of the unit steel pipe structure Shaped ends 120c, 220c, 320c; It consists of,
A part of the reinforcing member 120 of the first unit steel pipe structure 100 is inserted into the second unit steel pipe structure 200 in the vertical direction,
The reinforcing member 220 of the second unit steel pipe structure 200 is provided in a pair formed in opposite directions,
A portion of the reinforcing member 220 facing downward is inserted into the first unit steel pipe structure 100, and a portion of the reinforcing member 220 facing upwards is inside the third unit steel pipe structure 300. Is inserted into,
A part of the reinforcing member 320 of the third unit steel pipe structure 300 is inserted inside the second unit steel pipe structure 200 in the vertical direction,
The reinforcing members 120, 220, and 320 of the first to third unit steel pipe structures 100, 200, 300 are fixed to concrete, and the first to third unit steel pipe structures 100, 200, 300 It is formed to strengthen the bonding force of the joint,
A fixing member is formed outside the joint where the first to third unit steel pipe structures 100, 200 and 300 contact each other,
The fixing member is formed to strengthen the coupling force of the joint of the first to third unit steel pipe structures (100, 200, 300),
Prefabricated steel pipe.
According to claim 1,
The reinforcing member (120, 220, 320) is formed to be respectively coupled to the four sides by a coupling means,
The coupling means, after curing of the concrete is finished, is formed to be removable from the outside of the assembled steel pipe 500,
Prefabricated steel pipe.
delete delete According to claim 1,
The end of the reinforcing member (120, 220, 320) is a hook shape bent 90 degrees or 180 degrees,
Prefabricated steel pipe.
As a construction method of a concrete-filled structure, using the prefabricated steel pipe according to any one of claims 1, 2, and 5,
(a) stacking the first to third unit steel pipe structures 100, 200 and 300 in a first direction;
(b) fixing the first to third unit steel pipe structures 100, 200 and 300 using fixing members formed on outer surfaces of the first to third unit steel pipe structures 100, 200 and 300, respectively. Letting;
(c) pouring concrete into the assembled steel pipe 500 made of the first to third unit steel pipe structures 100, 200, and 300;
(d) curing the concrete; And
(e) after curing of the concrete is finished, the unit steel pipe structure 100, the coupling means for fixing between the reinforcing members 120, 220, 320 and the unit steel pipe structures 100, 200, 300 200, 300); Containing,
Construction method of concrete-filled structures.

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