KR20230106216A - Metal pipe for composite column, composite column structure and method for producting metal pipe for composite column - Google Patents

Abstract

The present invention relates to a metal pipe for a composite column and a composite column structure. According to one embodiment of the present invention, the metal pipe used in a composite column for strength reinforcement comprises: a metal pipe body formed in a pipe shape to form a concrete pouring space inside; and at least one restraining member that forms at least one band layer along an inner circumference of the metal pipe body and restrains a lateral pressure due to concrete pouring. Additionally, the present invention proposes the composite column structure including the composite column. Thus, the present invention can propose the method for manufacturing the metal pipe for a composite column, the composite column structure, and the metal pipe for a composite column in which a restraining member is formed along the inner circumference to restrain the lateral pressure resulting from concrete pouring.

Description

Metal pipe for composite column, composite column structure, and method for manufacturing metal pipe for composite column

The present invention relates to a metal pipe for a composite pillar, a composite pillar structure, and a method for manufacturing a metal pipe for a composite pillar. Specifically, it relates to a metal pipe for synthetic pillars used in synthetic pillars for reinforcing internal strength, a synthetic pillar structure including the same, and a method for manufacturing a metal pipe for composite pillars.

The pillars of a building play the most important supporting role of a building structure by sharing the compressive force acting in the direction of gravity. In addition, when vertical loads as well as horizontal loads such as wind loads and seismic loads are applied in combination, bending due to moment occurs and tensile force is generated in a part of the cross section of the column, so this must be taken into account during design.

In the case of existing reinforced concrete columns, the main reinforcing bars are reinforced in the longitudinal direction, which is the load transmission direction, and the strip reinforcing bars are used for the purpose of fixing the position of the main reinforcing bars and resisting buckling by horizontal loads, and the strip reinforcing bars enhance the ductility and shear capacity of the columns. It is used for the purpose of making it, so it is called transverse reinforcement.

Composite columns are being used as one of the methods for reinforcing the shear resistance of existing reinforced concrete columns.

Composite columns include CFT (Concrete-Filled Tube) columns, which are formed by combining steel pipes and filled with concrete, and SRC (Steel-Reinforced Concrete) columns, which are composited by planting H-beams or steel pipe members in concrete columns.

In the case of a CFT column, during on-site concrete pouring, the lateral pressure caused by the concrete load is transmitted to the steel pipe, which can cause a bloating phenomenon on the lower side or burst the steel pipe. It may be necessary to wrap or bind with wire or steel wire.

However, in the case of installing a temporary facility such as a belt on the outside of the steel pipe, the cost of installing the temporary facility and the cost of removing the concrete after curing are inevitably required.

Republic of Korea Patent Publication No. 10-2021-0070632 (published on June 15, 2021) Republic of Korea Patent Publication No. 10-2021-0126875 (published on October 21, 2021)

The present invention is intended to solve the above problems, and proposes a method for manufacturing a metal pipe for a composite column, a composite column structure, and a metal pipe for a composite column in which a restraining member is formed along the inner circumference for restraining the lateral pressure caused by concrete placement.

In order to achieve the above object, according to one aspect of the present invention, in the metal pipe used in the composite column for load-bearing reinforcement, the metal pipe body formed in a tubular shape to form a concrete pouring space therein; and at least one restraining member that forms at least one band layer along the inner circumference of the metal tube body and restrains the lateral pressure caused by concrete placement.

At this time, in one example, the metal tube body has a hollow square column or cylindrical shape, and the restraining member may be formed such that an interior angle with a vertical surface of the metal tube body is less than 90 ° at a cross section coupled to the metal tube body.

In addition, at this time, the cross section of the restraining member combined with the metal tube body may form a triangle, a bow shape, a semicircular shape, or a polygonal shape of more than a square.

Next, in order to achieve the above object, according to another aspect of the present invention, in the composite column structure for load-bearing reinforcement, the metal tube for the composite column according to any one of the examples of the above-described invention; and a reinforced concrete formed inside the metal pipe for the composite pillar.

Continuing, in order to achieve the above object, according to another aspect of the present invention, in the metal pipe manufacturing method used to form a composite column for load-bearing reinforcement, a 'c'-shaped or 'C'-shaped metal plate forming a semi-tubular body in which at least one restraining member forming at least one band layer is coupled to an inner circumference; and a rectangular column or a rectangular column or a rectangular column so that a band layer formed along the inner circumference by at least one restraining member for confining the lateral pressure caused by concrete casting is formed by welding two semi-tubes at the outer circumference of the reinforcement column to form a concrete pouring space therein. A method of manufacturing a metal tube for a composite pillar having a cylindrical shape is proposed, comprising the step of forming a metal tube for a composite pillar.

In this case, the constraining member may be coupled such that an internal angle between a vertical surface of the metal plate and a cross section coupled to the metal plate is less than 90°.

According to one embodiment of the present invention, by forming a plurality of restraining members around the inner circumference of the metal pipe for composite columns, it is possible to restrain the lateral pressure caused by on-site concrete placement, and the restraining members integrally form a structure together with the composite pillars. By doing so, there is no need to remove after concrete curing like the conventional temporary facilities installed on the outer periphery.

It is obvious that various effects not directly mentioned according to various embodiments of the present invention can be derived from various configurations according to embodiments of the present invention by those skilled in the art.

1 is a view schematically showing a metal tube for a composite pillar according to one embodiment of the present invention.
2 is a view schematically showing a metal tube for a composite pillar according to another embodiment of the present invention.
3 is a view schematically showing a portion of a vertical section of a metal tube for composite columns according to one embodiment of the present invention.
4 is a view schematically showing a composite pillar structure according to another embodiment of the present invention.
5A is a view schematically showing a semi-tubular body formed in a method for manufacturing a metal tube for a composite pillar according to another embodiment of the present invention.
FIG. 5B is a view schematically illustrating a state in which a metal pipe for a composite column is formed by combining two semi-tubes of FIG. 5A around the periphery of a reinforcement column.
FIG. 5C is a view schematically illustrating a state in which a composite column structure is formed by pouring concrete into the inner space of the metal tube for composite columns formed in FIG. 5B.

Embodiments of the present invention for achieving the above object will be described with reference to the accompanying drawings. In the present description, the same reference numerals denote the same components, and sub-descriptions may be omitted in order to promote understanding of the present invention to those skilled in the art.

In this specification, unless there is a limitation that one component is 'directly' in a connection, combination, or arrangement relationship with another component, not only in the form of 'direct connection, combination, or arrangement', but also by interposing another component between them. It may also exist in the form of being connected, coupled or arranged.

It should be noted that even though singular expressions are described in this specification, they may be used as a concept representing the entirety of a plurality of components unless interpreted contrary to, clearly different from, or contradictory to the concept of the invention. In this specification, descriptions such as 'comprising', 'having', 'including', 'including', etc. should be understood as the possibility of the presence or addition of one or more other elements or combinations thereof.

The drawings referred to in this specification are examples for explaining an embodiment of the present invention, and the shape, size, thickness, etc. may be exaggerated or reduced for effective description of technical features.

[Metal tube for composite columns]

First, a metal tube for a composite pillar according to one aspect of the present invention will be reviewed with reference to FIGS. 1, 2, 3, 4, 5b or 5c. In addition, in understanding the metal pipe for a composite pillar according to one example of the present invention, reference may be made to descriptions of embodiments of a method for manufacturing a metal pipe for a composite pillar, which will be described later, as well as the description below.

1 is a view schematically showing a metal pipe for a composite pillar according to one embodiment of the present invention, FIG. 2 is a view schematically showing a metal pipe for a composite pillar according to another embodiment of the present invention, and FIG. It is a view schematically showing a part of a vertical section of a metal pipe for a composite pillar according to one embodiment of the present invention. 5B is a view schematically showing a state in which a metal pipe for a composite column is formed by combining two semi-tubes around the circumference of a reinforcement column. 4 and 5c are views schematically showing how a composite pillar structure is formed using a metal tube for a composite pillar.

Referring to Figures 1, 2, 3, 4, 5b or 5c, look at the metal tube used in the composite column for load-bearing reinforcement, that is, the metal tube 1 for the composite column in one example. At this time, the metal pipe 1 for the composite pillar includes a metal pipe body 10 and at least one restraining member 20 .

At this time, the metal tube body 10 is formed in a tubular shape to form a concrete pouring space therein. For example, the material of the metal tube body 10 may be a steel plate. Even if the metal tube body 10 is formed by processing a thin steel plate, the lateral pressure caused by the cast-in-place concrete 3a can be restrained by the restraining member 20 forming at least one band layer.

For example, the metal tube body 10 may be formed by combining two half-shaped metal tube bodies. For example, referring to FIG. 5B, a metal tube body 10 to which at least one restraining member 20 is coupled by welding two semi-tube bodies 1a and 1b to the outer circumference of a reinforcement column 3b is used for a composite column. A metal tube 1 may be formed. For example, at this time, the semi-tubes 1a and 1b are formed by combining a plurality of restraining members 20 forming a plurality of band layers around the inner circumference of the half-shaped metal tube body in which the metal plate 11 is bent. A metal tube 1 may be formed.

For example, in one example, the metal tube body 10 may have a hollow square columnar or cylindrical shape.

1, 2, 3, 4, look at the restraining member 20 with reference to 5b or 5c. At least one restraining member 20 forms at least one band layer along the inner circumference of the metal tube body 10 and restrains the lateral pressure caused by concrete placement. For example, the restraining member 20 may be made of a steel material, and in this case, the restraining member 20 may be welded to a vertical surface of the metal tube body 10 along the inner circumference of the metal tube body 10 . For example, the restraining member 20 may form a plurality of band layers.

According to one example, by providing the restraining member 20 forming a strip layer along the inner circumference of the metal pipe 1 for the composite column, even if the metal pipe body 10 is made of a thin metal plate in terms of the formwork role during concrete pouring, concrete It is possible to solve the fullness phenomenon by suppressing the lateral pressure according to the fluidity of the body, and in addition, it is possible to solve the torsion phenomenon that can occur when it is made of only the metal tube body 10, thereby improving the role of the composite pillar.

For example, referring to FIG. 3 , the restraining member 20 may be formed such that an internal angle between a vertical surface of the metal tube body 10 and a cross section coupled to the metal tube body 10 is less than 90°. As shown in FIG. 3, by making the interior angle with the vertical surface of the metal pipe body 10 less than 90 °, it is possible to prevent the occurrence of unfilled defective spaces during concrete pouring. If, unlike the illustration of FIG. 3, if a vertical surface of the metal tube body 10 and a vertical interior angle such as a square or a rectangle are formed, in the lower space where the metal tube body 10 and the restraining member 20 are combined during concrete pouring from the upper side. There may be defective spaces that are not filled (filled) with concrete.

For example, in one example, the restraining member 20 may form a cross section coupled to the metal tube body 10 in a triangular shape, a bow shape, a semicircular shape, or a quadrangular or higher polygonal shape. For example, the restraining member 20 may be made of a 'b'-shaped angle or a vertically cut circular tube. At this time, the restraining member 20 may be welded to the vertical surface of the metal tube body 10 .

[composite column structure]

A composite pillar structure according to another aspect of the present invention can be understood with reference to FIGS. 4 and 5c.

4 is a schematic view of a composite pillar structure according to another embodiment of the present invention. FIG. 5C is a view schematically illustrating a state in which a composite columnar structure is formed by combining two semi-tubes of FIG. 5A.

At this time, although not shown in FIGS. 1, 2 or 5b, a composite column structure is formed by pouring reinforced concrete 3 into the illustrated metal pipe 1 for a composite column as shown in FIGS. 4 and/or 5c.

A composite column structure for load-bearing reinforcement according to one example includes a metal tube for composite columns (1) and reinforced concrete (3).

At this time, since the metal pipe 1 for the composite pillar is one of the embodiments of the metal pipe 1 for the composite pillar according to the above-described invention, the above description will be referred to.

Reinforced concrete (3) is formed inside the metal pipe (1) for the composite column. At this time, for example, as shown in FIG. 5B, after forming the reinforcing column 3b for the composite column, the metal tube 1 for the composite column is formed around the outer circumference of the reinforcing column 3b, and then the metal tube for the composite column as shown in FIG. 5C. (1) Reinforced concrete 3 can be formed by pouring concrete 3a inside.

For example, by combining two semi-tubes 1a shown in FIG. 5a around the reinforcement 3b of FIG. 5b to form a metal pipe 1 for a composite column, or around the reinforcement 3b of FIG. After forming the metal pipe 1 for the composite pillar, as shown in FIG. 5C , concrete 3a may be poured into the inner space of the metal pipe 1 for the composite pillar to form a composite pillar structure.

[Method of manufacturing metal pipe for composite column]

A method of manufacturing a metal tube for a composite pillar according to another aspect of the present invention will be reviewed with reference to FIGS. 5A to 5B. At this time, reference may be made to the embodiments of the metal tube for the composite pillar according to the above-described invention and FIGS. 1 to 3.

5A is a view schematically showing a semi-tube formed in a method for manufacturing a metal pipe for a composite pillar according to another embodiment of the present invention, and FIG. 5B is a metal pipe for a composite pillar formed by combining two semi-tubes of FIG. 5A. It is a drawing that schematically shows a shape.

Referring to FIGS. 5A and 5B , according to an example, a method of manufacturing a metal pipe used to form a composite pillar for load-bearing reinforcement, that is, a method of manufacturing a metal pipe for a composite pillar will be described.

A method of manufacturing a metal pipe for a composite pillar according to an example includes forming semi-tubes 1a and 1b (see FIG. 5A) and forming a metal pipe 1 for a composite pillar (see FIG. 5B).

At this time, referring to FIG. 5A, in the step of forming the semi-tube 1a, at least one restraining member 20a forming at least one band layer around the inner circumference of the 'c'-shaped or 'C'-shaped metal plate 11 ) forms a combined semi-tubular body 1a.

For example, after combining at least one restraining member 20a forming at least one band layer on a flat metal plate 11 by welding or the like, the metal plate 11 is bent together with the restraining member 20a to form a 'c' shape or After forming the 'C'-shaped semi-tubular body 1a, or manufacturing at least one or more restraining members 20a in a 'c' shape or 'C' shape, temporarily fixing them to form at least one band layer, and then forming a circumference thereof. Accordingly, the metal plate 11 may be bent or bent, and then joined by welding or the like from the inside to form a 'c'-shaped or 'C'-shaped semi-tubular body 1a.

For example, referring to FIG. 5A , in the step of forming the semi-tubes 1a and 1b, both sides or one side of the metal plate 11 to which at least one restraining member 20 forming one or more band layers is coupled to the inside is bent. The end portion 11a may be configured to weld two semi-tubes 1a and 1b. At this time, the two semi-tubes (1a, 1b) have a coupling surface by the bent end (11a) when coupled. FIG. 5A shows a semi-tube 1a having a bent end 11a on one side, and the metal pipe 1 for a composite pillar in FIG. 1 shows a semi-tube having a bent end 11a on both sides. The semi-tubular body 1a shown in FIG. 5A and the semi-tubular body corresponding to half of the metal pipe 1 for the composite pillar shown in FIG. 1 are each examples and can be changed into various structures.

Next, referring to FIGS. 1 and 5b, in the step of forming the metal pipe 1 for the composite column, two semi-tubes 1a and 1b are welded together around the outer circumference of the reinforcement column 3b and concrete is poured inside. The metal pipe 1 for composite pillars in the shape of a square or cylindrical shape is formed so that a band layer is formed along the inner circumference by the restraining members 20a and 20b to form a space and restrain the lateral pressure caused by the concrete 3a pouring. 5B shows that the metal pipe 1 for the composite column is formed by combining two semi-tubes 1a and 1b around the circumference of the reinforcement column 3b.

At this time, referring to FIG. 3 , in one example, the restraining member 20 may be coupled such that an internal angle with a vertical surface of the metal plate 11 is less than 90° at a cross section coupled with the metal plate 11 .

[Method of forming composite column structure]

In addition, referring to FIGS. 5A to 5C , a method of forming a composite pillar structure can be seen.

First, as shown in FIG. 5A, a semi-tubular body 1a is formed.

Then, as shown in FIG. 5B, a metal pipe 1 for a composite pillar is formed. At this time, after forming the reinforcement column 3b, the metal pipe 1 for the composite column in the shape of a square column or a cylinder is formed by welding the two semi-tubes 1a and 1b around the outer circumference of the reinforcement column 3b. can The metal pipe 1 for the composite pillar forms at least one band layer by at least one restraining member 20a, 20b along the inner circumference by welding the two semi-tubes 1a and 1b.

Next, as shown in FIG. 5C, a composite column structure may be formed by pouring concrete 3a into the inner space of the metal pipe 1 for the composite column. At this time, at least one or more band layers formed around the inner circumference of the metal pipe 1 for the composite column can restrain the lateral pressure caused by the concrete 3a.

In the above, the foregoing embodiment and the accompanying drawings are not intended to limit the scope of the present invention, but have been described by way of example to help those skilled in the art understand the present invention. In addition, embodiments according to various combinations of the above-described configurations may be clearly implemented to those skilled in the art from the detailed descriptions above. Therefore, various embodiments of the present invention may be implemented in a modified form within a range that does not deviate from the essential characteristics of the present invention, and the scope of the present invention should be interpreted according to the invention described in the claims, and common in the art It contains various modifications, alternatives and equivalents made by those with knowledge of.

1: metal tube for composite column 1a, 1b: semi-tube body
3: reinforced concrete 3a: concrete
3b: reinforcement 10: metal tube
11: metal plate 20, 20a, 20b: restraining member

Claims (6)

In the metal tube used in the composite column for strength reinforcement,
A metal pipe body formed in a tubular shape to form a concrete pouring space therein; and
A metal pipe for a composite column comprising at least one restraining member that forms at least one band layer along the inner circumference of the metal pipe body and restrains the lateral pressure according to the concrete casting.
In claim 1,
The metal tubular body has a hollow rectangular column or cylindrical shape,
The restraining member is a metal tube for composite pillars, characterized in that formed so that an interior angle with a vertical surface of the metal tube body is less than 90 ° at a cross section coupled to the metal tube body.
In claim 2,
The confining member is a metal tube for composite pillars, characterized in that the cross section coupled to the metal tube body forms a polygon of a triangle, a bow, a semicircle or a quadrangular or more.
In the composite column structure for load-bearing reinforcement,
A metal tube for a composite pillar according to any one of claims 1 to 3; and
A composite column structure comprising a reinforced concrete formed inside the metal tube for the composite column.
In the method of manufacturing a metal pipe used to form a composite column for strength reinforcement,
forming a semi-tubular body in which at least one restraining member forming at least one band layer is coupled to an inner circumference of a 'c'-shaped or 'C'-shaped metal plate; and
The two semi-tubes are welded together at the outer circumference of the reinforcement column to form a concrete pouring space inside, and a square so that a band layer formed along the inner circumference by the at least one restraining member for restraining the lateral pressure caused by the concrete pouring is formed. A method of manufacturing a metal pipe for a composite pillar, comprising the step of forming a metal pipe for a composite pillar in the shape of a pillar or a cylinder.
In claim 5,
The method of manufacturing a metal pipe for a composite column, characterized in that the restraining member is coupled such that an interior angle with a vertical surface of the metal plate is less than 90 ° at a cross section coupled to the metal plate.

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