KR20190009452A - 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 relates to an assembly type steel pipe which includes a plurality of unit steel pipe structures assembled to be extended and fills concrete therein so as to be used for a concrete filled tub (CFT) structure. According to the present invention, the unit steel pipe structure has a reinforcement member coupled to an inner surface. The reinforcement member is extended in an extension direction of the assembly type steel pipe or an opposite direction thereof to protrude from the unit steel pipe structure. The unit steel pipe structure comprises a first or second unit steel pipe structure (100, 200), and the assembly type steel pipe (500) comprises first and second unit steel pipe structures (100, 200). A reinforcement member (120) of the first unit steel pipe structure (100) is inserted into the second unit steel pipe structure (200) and a reinforcement member (220) is inserted into the first unit steel pipe structure (100). The reinforcement members (120, 200) of the first and second unit steel pipe structures are anchored on concrete to reinforce coupling force of a joint part of the first and second unit steel pipe structures (100, 200).

Description

Technical Field [0001] The present invention relates to an assembled steel pipe having a reinforcing member therein, and a method of constructing a concrete filled structure using the steel pipe. [0002]

The present invention relates to an assembled steel pipe having a reinforcing member therein and a method of constructing a concrete-filled structure using the same.

Concrete Filled Tube (abbreviated as CFT) structure, which is referred to as the fourth structural system following the reinforced concrete structure (RC structure), the steel structure (S structure) and the steel reinforced concrete structure (SRC structure) Recently, researches have been actively conducted in developed countries such as the United States and Japan, and they are successfully applied to skyscraper buildings.

The CFT structure is high in ductility and relatively simple in construction, and it is possible to increase the flexural resistance and compressive resistance efficiency of the cross section through the synthesis of steel and concrete. As a result, the column and wall of the super high- Lt; / RTI >

In addition, by using the steel pipe as a form, it is possible to omit the formwork, and the concrete can prevent the local buckling of the steel pipe and the steel pipe can confine the inner concrete, thereby increasing the ductility which is the weakest point of the concrete .

In concrete, concrete is very strong in compressive force but weak in tensile force. Iron is strong both in tensile and compressive strength, but it is weak in local buckling. CFT structure is well complemented with advantages and disadvantages of these two materials Structure.

On the other hand, the CTF structure can be applied to the column. When the length is long due to the characteristics of the column, most of the columns should be jointed by welding or bolts arranged like the other steel construction methods.

FIG. 1 is a perspective view showing a conventional CFT column, and FIG. 2 is a perspective view showing a structure in which a CFT column shown in FIG. 1 is stepped.

Referring to FIGS. 1 and 2, a conventional CFT column 10 has a pair of upper and lower unit columns 11 and 12 joined to each other through joint W by welding as shown in FIG. 1 .

In this case, for securing the proof strength of the welded joint, as shown in FIG. 2, the dam plate 13 is stuck to the joint portion, and then the entire reinforcing plate outer line is welded and reinforced.

In the conventional CFT column 10, the labor cost rises due to excessive welding, which is a factor of cost increase, and the plate 13, which is provided for securing the proof strength of the joint part, There is a problem that the number of materials increases and the cost increases because a thicker steel plate must be applied.

Further, since the unit columns 11 and 12 used for CFT are generally formed to be thin, there is a problem that a thin steel pipe can be deformed due to welding heat at the time of joining.

Accordingly, there is a high need for a technique that can increase the structural rigidity of the joints of unit columns that are vulnerable to external forces, while bonding the unit columns without the need for field welding when constructing the CFT structure.

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

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

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and in particular, it is an object of the present invention to provide an assembled steel pipe which does not require a welding operation when joining unit steel pipe structures, And to provide an assembled steel pipe with increased structural rigidity.

According to an aspect of the present invention, there is provided a method of manufacturing a composite steel pipe, which is used in a concrete filled tube (CFT) structure in which unit steel pipe structures are assembled and extended and filled with concrete, Wherein the reinforcing member is formed on the inner surface of the unit steel tube structure and the reinforcing member is formed so as to protrude from the unit steel tube structure and extend in the extending direction or the opposite direction of the assembled steel pipe, And the first and second unit steel pipe structures 100 and 200. The first and second unit steel pipe structures 500 and 200 include first and second unit steel pipe structures 100 and 200, 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 inserted into the first unit steel pipe structure 100, Inside Shovel And the reinforcing members 120 and 220 of the first and second unit steel pipe structures 100 and 200 are fixed to the concrete so that the joints of the first and second unit steel pipe structures 100 and 200 To provide an assembled steel pipe which is formed so as to strengthen the bonding force.

The unit steel tube structures 100 and 200 are formed in a rectangular column shape having four sides and the reinforcing members 120 and 220 are coupled to the four faces by the coupling means 140 and 240, And the coupling means 140 and 240 are formed to be removable from the outer side of the assembled steel pipe 500 after the curing of the concrete is completed.

Further, the assembled steel pipe 500 includes a third unit steel pipe structure 300; Wherein the first to third unit steel pipe structures (100, 200, 300) are stacked in order, and the reinforcing member (220) of the second unit steel pipe structure (200) The reinforcing member 320 of the third unit steel pipe structure 300 is formed to be inserted into the unit steel pipe structure 100 and 300 and the reinforcing member 320 of the third unit steel pipe structure 300 is inserted into the second unit steel pipe structure 200 .

The portions 120a and 220a of the reinforcing members 120 and 220 protruding from the unit steel tube structures 100 and 200 are formed in the shape of a claw bent in the center direction of the cross section of the unit steel tube structures 100 and 200 desirable.

The ends of the reinforcing members 120 and 220 are preferably claws that are bent at 90 degrees or 180 degrees.

According to another aspect of the present invention, there is provided a method of constructing a concrete-filled structure using the above-described assembled steel pipe, comprising the steps of: (a) , 200) in the first direction; (b) fixing the first and second unit steel tube structures 100 and 200 using the fixing members 160 and 260 formed on the outer surfaces of the first and second unit steel tube structures 100 and 200, ; (c) pouring concrete into an assembled steel pipe (500) comprising the first and second unit steel pipe structures (100, 200); (d) curing the concrete; (140, 240) fixing the reinforcing members (120, 220) and the unit steel tube structures (100, 200) to the unit steel tube structures (100, 200) after completion of curing of the concrete, 100, 200); To provide a method of constructing a concrete-filled structure.

Since the unit steel pipe structure constituting the assembled steel pipe according to the present invention includes the reinforcement member, the structural rigidity and strength at the joint portion of the unit steel pipe structures among the concrete filled structures can be increased.

In addition, since the fixing member is formed on the outer surface of the unit steel pipe structures, the welding process is unnecessary in the process of forming the assembled steel pipe by combining the unit steel pipe structures, so that the construction is convenient, By forming the steel pipe, deformation of the unit steel pipe structure due to welding can be prevented.

1 is a perspective view schematically showing a conventional CFT column.
FIG. 2 is a perspective view schematically showing the structure of the CFT column shown in FIG. 1; FIG.
3 is a perspective view schematically showing a state before joining the first and second unit steel pipe structures forming the assembled steel pipe according to the present invention.
FIG. 4 is a cross-sectional view showing a state where a first and a second unit steel pipe structure 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 joining the first to third unit steel pipe structures forming the assembled steel pipe according to the present invention.
Fig. 7 is a flowchart of a method for constructing a concrete-filled structure using an assembled steel pipe according to the present invention.

Hereinafter, an assembled steel pipe according to the present invention will be described in detail with reference to the drawings. Here, the constituent elements of the present invention can be used integrally or separately from each other as needed. In addition, some components may be omitted depending on the usage form. Various modifications can be made in the form and the number of elements of the present invention.

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 thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, the definitions of these terms should be described based on the contents throughout this specification.

It is to be understood that other types of assembled steel pipes including all the components corresponding to those of the embodiments or having other features in this specification may be easily derived.

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

3, the assembled steel pipe 500 is a structure in which the unit steel pipe structures are assembled and extended. Specifically, the unit steel pipe structure is composed of the first or second unit steel pipe structures 100 and 200, 1 unit steel pipe structure 100 means a unit steel pipe structure located below and a second unit steel pipe structure 200 means a unit steel pipe structure located above.

At this time, the reinforcing 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 reinforcing member 120 of the first unit steel pipe structure 100 is connected to the assembled steel pipe 500 and the reinforcing member 220 of the second unit steel pipe structure 200 is protruded toward the downward direction opposite to the extending direction.

The reinforcing members 120 and 220 are respectively coupled to the inner surfaces of the first and second unit steel pipe structures 100 and 200 so that the first and second unit steel pipe structures 100 and 200 are assembled The reinforcing members 120 and 220 are not exposed to the outside and are thus formed to be fixed to the inside of the concrete after the pouring and curing of 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 inserted into the first And is inserted to the inside of the unit steel pipe structure 100.

On the other hand, the first and second unit steel pipe structures 100 and 200 are formed in the shape of a quadrangle in which four surfaces are formed, and the reinforcing members 120 and 220 are formed on the four surfaces by the combining means 140 and 240, The coupling means 140 and 240 can be removed again later, and they can be coupled through bolting.

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

On the other hand, the number of the reinforcing members 120 and 220 coupled to the respective surfaces is freely adjustable according to the designer's choice or need, and the height at which the reinforcing members 120 and 220 are coupled can also be changed.

FIG. 4 is a cross-sectional view showing a state where a first and a second unit steel pipe structure according to the present invention are combined to form an assembled steel pipe.

4, the portions 120a and 220a of the reinforcing members 120 and 220 protruding from the joint ends of the unit steel tube structures 100 and 200 are bent in the direction of the center of the cross section of the unit steel tube structures 100 and 200, And the ends of the reinforcing members 120 and 220 are hooked at 180 degrees.

The end portions of the reinforcing members 120 and 220 are formed in the shape of hooks so that the strength of the reinforcing members 120 and 220 can be more enhanced as compared with the plate structure in which the ends of the reinforcing members 120 and 220 are not bent.

Accordingly, when a transverse external force is applied to the joints of the first and second unit steel pipe structures 100 and 200, the external force is applied to the concrete filled in the first unit steel pipe structure 100, It is possible to uniformly dissolve the concrete filled in the structure 200, which ultimately can reinforce the structural stiffness and strength of the joint.

The fixing members 160 and 260 are formed on the outer surfaces of the first and second unit steel pipe structures 100 and 200 and the first and second unit steel pipe structures 100 and 200 are formed on the outer surfaces of the first and second unit steel pipe structures 100 and 200, 200, and are formed at mutually corresponding positions so that the first and second unit steel pipe structures 100, 200 are fixed.

As described above, the first and second unit steel pipe structures 100 and 200 are joined together through the fixing members 160 and 260, so that in the process of extending the assembled steel pipe 500, It is possible to prevent the phenomenon, and thus, it is possible to provide convenience in construction work of the operator.

The fixing members 160 and 260 may be welded to and joined to the first and second unit steel pipe structures 100 and 200 and may be relatively The welding area can be minimized.

Further, the fixing members 160 and 260 may be formed by brackets having a "C" -perpendicular cross-section or other known members, but are not limited thereto.

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

5, the reinforcing member 120 is composed of a portion 120b inserted into the first unit steel pipe structure 100 and a portion 120a inserted into 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. [

At this time, the end 120c of the part to be inserted into the second unit structure 200 is in the shape of a hook that is bent at 90 degrees, and the first unit steel structure 100 is inserted into the first unit structure 100, And a portion coupled to the first unit steel pipe structure 100 is formed to have a larger area than other portions for the purpose of engagement.

6 is a perspective view schematically showing a state before the first to third unit steel pipe structures are joined to form an assembled steel pipe according to the present invention.

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

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, (320) is formed to be inserted into the second unit steel pipe structure (200).

Specifically, the second unit steel pipe structure 200 positioned at the center of the first through third unit steel pipe structures 100, 200, and 300 includes a reinforcing member 220 extending toward the first unit steel pipe structure 100, And a reinforcing member 220 extending toward the third unit steel pipe structure 300.

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

7, a method of constructing a concrete-filled structure includes a step (S10) of stacking the first and second unit steel pipe structures 100 and 200 in the direction of extension of the assembled steel pipe, (S20) of fixing the first and second unit steel pipe structures (100, 200) using the fixing members (160, 260) formed on the outer surfaces of the two unit steel pipe structures (100, 200) (S30) of pouring concrete into an assembled steel pipe (500) composed of the first and second unit steel pipe structures (100, 200), curing the concrete (S40), and after curing of the concrete, The step (S50) of removing the engaging means (140, 240) fixing the reinforcing members (120, 220) and the unit steel tube structures (100, 200) from the outside of the unit steel tube structures (100, 200) .

At this time, in the step S50, the portion from which the coupling means 140 and 240 have been removed can be supplemented through a separate finishing process to the portion from which the coupling means 140 and 240 are removed.

While the present invention has been described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. It will be appreciated that embodiments are possible. Accordingly, the scope of protection of the present invention should be determined by the claims.

10: main frame 100: first unit steel pipe structure
200: second unit steel pipe structure 300: third unit steel pipe structure
120, 220, 320: reinforcing member 140, 240: engaging means
160, 260: Fixing member

Claims (6)

An assembled steel pipe used for a concrete filled tube (CFT) structure in which unit steel pipe structures are assembled and extended and filled with concrete,
Wherein the unit steel pipe structure has a reinforcing member coupled to an inner surface thereof,
Wherein the reinforcing member is formed to extend in the extending direction of the assembled steel pipe or in the opposite direction and protrude from the unit steel pipe structure,
The unit steel pipe structure includes a first or second unit steel pipe structure 100 and 200 and the assembled steel pipe 500 includes first and second unit steel pipe structures 100 and 200,
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 inserted into the first unit steel pipe structure 200, Is formed to be inserted into the unit steel pipe structure 100,
The reinforcing members 120 and 220 of the first and second unit steel pipe structures 100 and 200 are fixed to the concrete to enhance the bonding force of the joint portions of the first and second unit steel pipe structures 100 and 200 Formed,
Assembled Steel Pipes.
The method according to claim 1,
The unit steel pipe structure 100, 200 has a quadrangular prism shape having four sides,
The reinforcing members 120 and 220 are formed to be respectively coupled to the four surfaces by the coupling means 140 and 240,
The coupling means (140, 240) are formed to be removable from the outer side of the assembled steel pipe (500) after the curing of the concrete is completed.
Assembled Steel Pipes.
The method according to claim 1,
The assembled steel pipe (500) includes a third unit steel pipe structure (300); Further comprising:
The first to third unit steel pipe structures 100, 200, and 300 are stacked in order,
The reinforcing member 220 of the second unit steel pipe structure 200 is inserted into the first and third unit steel pipe structures 100 and 300,
The reinforcing member 320 of the third unit steel pipe structure 300 is inserted into the second unit steel pipe structure 200,
Assembled Steel Pipes.
The method according to claim 1,
The portions 120a and 220a of the reinforcing members 120 and 220 protruding from the unit steel tube structures 100 and 200 are formed in a shape of a claw bent in the center direction of the cross section of the unit steel tube structures 100 and 200,
Assembled Steel Pipes.
5. The method of claim 4,
The end portions of the reinforcing members (120, 220) are claw-shaped, bent at 90 degrees or 180 degrees,
Assembled Steel Pipes.
A method of constructing a concrete-filled structure using an assembled steel pipe according to any one of claims 1 to 5,
(a) stacking the first and second unit steel pipe structures (100, 200) in the first direction;
(b) fixing the first and second unit steel tube structures 100 and 200 using the fixing members 160 and 260 formed on the outer surfaces of the first and second unit steel tube structures 100 and 200, ;
(c) pouring concrete into an assembled steel pipe (500) comprising the first and second unit steel pipe structures (100, 200);
(d) curing the concrete; And
(140, 240) fixing the reinforcing members (120, 220) and the unit steel tube structures (100, 200) to the unit steel tube structures (100, 200) after the curing of the concrete is completed. , 200); / RTI >
CONSTRUCTION METHOD FOR CONCRETE FILLED STRUCTURE.

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