KR101767677B1 - Compisite column structure for steel and concrete - Google Patents

Compisite column structure for steel and concrete Download PDF

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Publication number
KR101767677B1
KR101767677B1 KR1020100136089A KR20100136089A KR101767677B1 KR 101767677 B1 KR101767677 B1 KR 101767677B1 KR 1020100136089 A KR1020100136089 A KR 1020100136089A KR 20100136089 A KR20100136089 A KR 20100136089A KR 101767677 B1 KR101767677 B1 KR 101767677B1
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KR
South Korea
Prior art keywords
steel pipe
concrete
pipe column
column
inner
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KR1020100136089A
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Korean (ko)
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KR20120074130A (en
Inventor
최인락
김진호
정경수
하태휴
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주식회사 포스코
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/30Columns; Pillars; Struts
    • E04C3/36Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19Three-dimensional framework structures
    • E04B1/1903Connecting nodes specially adapted therefor
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/30Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/54Joints substantially without separate connecting elements, e.g. jointing by inter-engagement
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/58Connections for building structures in general of bar-shaped building elements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19Three-dimensional framework structures
    • E04B1/1903Connecting nodes specially adapted therefor
    • E04B2001/1921Connecting nodes specially adapted therefor with connecting nodes having radial connecting stubs

Abstract

The present invention provides a steel concrete composite column structure.
The present invention relates to an internal steel pipe column; An outer steel pipe column provided on the outside with an interval from the inner steel pipe column; A first concrete part laid inside the inner steel pipe column; And a second concrete portion laid between the inner steel pipe column and the outer steel pipe column, wherein the inner steel pipe column is made of a circular steel pipe having a yield strength of 600 MPa or more, and the first concrete portion has a second concrete portion The first concrete section can be provided with a high strength concrete having a compressive strength of 60 MPa or more, and can provide a steel concrete composite column structure.
According to the steel concrete composite column structure of the present invention, the first and second concrete laid on the inside and outside of the inner steel pipe column can delay the buckling of the inner steel pipe column, thereby improving the compression performance of the composite column have.
In addition, the first and second concrete placed in the inside of the steel pipe column have the effect of increasing the strength of the whole synthetic column by improving the deforming ability of the material by the constraining effect of the steel pipe column.
In addition, since the outer steel pipe column is disposed outside the inner steel pipe column and the concrete that bear the main load, it is not necessary to apply the refractory sheath, and the work process for laying the mold can be omitted, The effect can be obtained.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a composite concrete column structure,

The present invention relates to a steel composite column structure, and more particularly, to a composite column structure that fully utilizes the material characteristics of a steel pipe and concrete using concrete having a material strength different from that of two steel pipes.

Due to the demand for efficient use of land and the development of construction construction technology, most of the buildings constructed in recent years have been designed and constructed as multi-layered buildings composed of a plurality of layers. Especially recently, Are becoming more than 40 floors in order to maximize the use of land. In the case of urban buildings where the work space is narrow and the work environment is relatively poor in designing and constructing such a super-high-rise structure, the steel structure and the steel-reinforced concrete composite structure, which are superior to the conventional reinforced concrete structure, Have been preferred. In addition, in designing column members in such a skyscraper structure, composite columns reinforced by steel columns or steel members with high strength concrete are frequently used because they can be appropriately sized so as to effectively use the internal space of the building.

Compared to ordinary reinforced concrete columns, these composite columns have advantages such as reduced cross section, flexibility in architectural planning, possibility of shortening of air due to efficient process, and high ductility. Also, The relatively inexpensive concrete contributes to the compressive strength of the column, which not only has the effect of reducing the construction cost but also has the advantage of preventing buckling of the steel column. In addition to the research on the existing steel reinforced concrete structure (SRC structure), the concrete filled steel pipe structure in which concrete is filled in the steel tube Steel Tube system (CFT structure).

In the SRC structure of the conventional synthetic column type structure as described above, reinforcement is placed around a steel frame skeleton, concrete is laid, and the three materials are integrated with each other. The SRC structure is intended to resist large compressive stresses and is used mainly for the columns of high-rise buildings because it exhibits high strength with a small cross section compared to ordinary reinforced concrete structures. At this time, concrete surrounding the steel frame (for example, H-shaped steel) plays a role of refractory coating and corrosion prevention.

However, the SRC structure requires complicated reinforcement and requires a lot of manpower, cost and time to invest in concrete formwork. In addition, since the steel material is located at the center of the column, the bending performance and the torsional performance are lower than those of the reinforced concrete column.

In addition, the CFT structure is a structure in which concrete is filled in an outer steel pipe without reinforcing steel bars. The CFT structure is advantageous in that rigidity, proof strength, and deformation ability are improved by the mutual constraint between the concrete filled in the inside and the outer steel pipe without requiring a formwork, and recent studies have been actively conducted. Particularly, since the steel material is located at the outermost portion of the member, the bending performance and the torsional performance of the member are improved.

However, in the case of the CFT structure, there is a weak point in the construction of the beam-column joint, so that the application to the general building structure in Korea is not active. Further, since the steel material is exposed to the outside, there is a problem that it is vulnerable to fire and corrosion.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a steel concrete composite column structure that fully utilizes the material properties of a steel pipe and concrete, To provide.

Another object of the present invention is to provide a steel concrete composite column structure having a joining portion to cope with horizontal members of various structural types such as a reinforced concrete beam and a steel beam.

Technical Solution [10] In order to achieve the above object, the present invention provides an internal steel pipe column, An outer steel pipe column provided on the outside with an interval from the inner steel pipe column; A first concrete part laid inside the inner steel pipe column; And a second concrete portion laid between the inner steel pipe column and the outer steel pipe column, wherein the inner steel pipe column is made of a circular steel pipe having a yield strength of 600 MPa or more, and the first concrete portion has a second concrete portion The first concrete section can be provided with a high strength concrete having a compressive strength of 60 MPa or more, and can provide a steel concrete composite column structure.

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In addition, the outer steel pipe column may be a square steel pipe.

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Meanwhile, it may further include a joint which is coupled to the inner steel pipe column and is provided for joining the other column or the horizontal member.

Preferably, the joining portion includes a body portion having the same cross section as the inner steel pipe column, and may have an outwardly extending extension portion.

More preferably, the joining portion may be formed with a plurality of holes.

According to the steel concrete composite column structure of the present invention, the first and second concrete laid on the inside and outside of the inner steel pipe column can delay the buckling phenomenon of the inner and outer steel pipe columns, thereby improving the compression performance of the composite column .

In addition, the first and second concrete placed in the inside of the steel pipe column are improved in the deformation ability of the material by the restraining effect of the steel pipe column, and the strength of the synthetic column can be increased. Accordingly, when designing the structure, it is possible to reduce the cross-section of the column member or to reduce the number of the columns, thereby securing the interior space and providing an excellent effect of securing the structural safety.

In addition, since the outer steel pipe column is disposed outside the inner steel pipe column and the concrete that bear the main load, it is not necessary to apply the refractory sheath, and the work process for laying the mold can be omitted, Provides an effect.

Further, the joining portion of the composite column according to the present invention provides an excellent effect of joining a horizontal member of various structural types such as a reinforced concrete beam or a steel frame to the column member.

1 is a perspective view showing the construction of a composite structure of steel concrete according to the present invention.
2 is a cross-sectional view showing a composite structure of steel concrete according to the present invention.
FIG. 3 is a perspective view showing a state in which the joints are joined according to the present invention. FIG.
FIG. 4 and FIG. 5 are views showing a state in which a reinforced concrete beam is installed on the steel concrete composite column structure of the present invention.
6 is a view showing a state in which a steel beam is installed on the steel concrete composite column structure of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show an embodiment of a composite structure of steel concrete according to the present invention.

Hereinafter, for convenience of explanation, the synthetic column structure and the synthetic column are denoted by the same reference numeral 100.

1 and 2, the steel concrete composite post structure 100 according to the present invention includes an inner steel pipe column 110, an outer steel pipe column 110 disposed outside the inner steel pipe column 110 A first concrete part 150 placed in the inner steel pipe column 110 and a second concrete part 170 placed between the inner steel pipe column 110 and the outer steel pipe column 130 can do.

That is, the present invention forms a composite column structure combining a dual steel pipe column structure in which a separate internal steel pipe column 110 is disposed inside the external steel pipe column 130, and concrete placed in the internal and external steel pipes 110 and 130 Feature.

As described above, the composite column structure 100 according to the present invention is composed of two steel pipes, which can overcome the disadvantages of the conventional reinforced concrete structure, the SRC structure, and the CFT structure.

At this time, the inner steel pipe column 110 may be formed of a round steel pipe.

Also, the outer steel pipe column 130 may be a rectangular steel pipe.

However, the outer steel pipe column 130 is not limited to a rectangular steel pipe, but may be a steel pipe having various cross-sectional shapes. For example, it may be formed of a round steel pipe. Also, in the case of a rectangular steel pipe, it is not limited to the rectangular steel pipe shown in Figs. 1 and 2, but may be formed of a polygonal shape.

More preferably, the first concrete portion 150 may have a higher strength than the second concrete portion 170.

That is, concrete having a different material strength may be installed between the inner steel pipe column 110 and the inner steel pipe column 110 and the outer steel pipe column 130. Preferably, the inner steel pipe column 110 A high strength concrete having a high compressive strength (for example, a compressive strength of 60 MPa or more) can be installed in the inside of the pipe.

The high-strength concrete makes it possible to increase the size and the size of the structure, reduce the cross-section of the structure, and increase the space efficiency and reduce the fixed load.

However, since the column is rapidly destroyed after reaching the maximum compressive strength, the column member made of high strength concrete can not exhibit a large deformation capacity.

Therefore, the first concrete part 150 installed in the inner steel pipe column 110 is provided as high-strength concrete, and the deformation capacity of the composite pipe 100 can be increased by the confinement effect by the steel pipe And it is possible to prevent the concrete from falling off due to cracking.

In this case, when the round steel pipe is used, the restraining effect on the concrete can be increased more than the square steel pipe. Also, the second concrete 170 and the outer steel pipe column 130 may have a restraining effect on the first concrete part 150.

The second concrete portion 170 can use concrete having a strength smaller than that of the first concrete portion 150. In this case, compared to the high-strength concrete poured into the first concrete portion 150, Lt; / RTI > Also, the constraining effect due to the inner and outer steel pipe columns 110 and 130 can be obtained.

That is, according to the composite column structure 100 of the present invention, the high strength concrete poured into the first concrete part 150 and the inner steel pipe column 110 can support a large load, and the second concrete part 170 serve to delay the local buckling of the inner and outer steel pipe columns 110, 130 while supporting the load. Therefore, the second concrete part 170 can use the ordinary concrete having a relatively low strength.

By varying the strength of the first and second concrete sections 150 and 170, the material can be economically used by using less expensive high-strength concrete.

On the other hand, when a high-strength steel material is applied to the inner steel pipe column 110, since a steel pipe has a large axial load, it is generally necessary to use a steel material that is thicker than a general steel material in order to prevent local buckling. Since the concrete is poured into the inside and outside of the steel pipe column, local buckling of the steel pipe can be delayed. Therefore, it is economical to increase the axial resistance of the composite column 100 by applying a steel material having a thickness smaller than that of a general steel pipe structure or a CFT structure.

However, since the inner steel pipe column 110 is poured with concrete inside and outside, the steel pipe can delay the buckling compared to a general steel pipe structure or a CFT structure. Therefore, the compression capacity of the composite column 100 can be increased.

Meanwhile, the outer steel pipe column 130 may be formed in a square or circular shape, and may be used as a formwork for a second concrete part 170 installed inside. Therefore, there is an advantage that a separate hypothesis work can be omitted.

The main load supported by the pillar member is made to bear in the core portion composed of the inner steel tube column 110 and the first and second concrete portions 150 and 170 so that the outer steel tube column 130 is prevented from corrosion or fire Since the synthetic pillars 100 have no role in supporting the load even when they are exposed, it is possible to omit the refractory coating on the synthetic pillars 100.

Meanwhile, the installation order of the inner steel pipe columns 110 and the outer steel pipe columns 130 may be different from that of the concrete. That is, in addition to integrally constructing the inner and outer steel pipe columns 110 and 130, the inner steel pipe columns 110 may be first installed in a plurality of layers (for example, 2 to 3 layers) And the external steel pipe column 130 can be installed thereafter.

That is, the inner steel pipe column 110 is first installed with a high strength steel material (for example, 600 MPa) to bear the construction load, then the outer steel pipe column 130 having the form function is installed, can do.

In the case of the inner steel pipe column 110 and the first concrete part 150, after the inner steel pipe column 110 is installed, the first concrete part 150 is installed in the inner steel pipe column 110, 100) can be applied. However, it is preferable that the first concrete part 150 be laid after installing the inner steel pipe column 110 composed of a high strength member and installing a slip or the like to make the installation load.

As described above, it is intended to fully utilize the material performance of the steel pipe and the concrete used for the composite column structure 100 to make the internal steel pipe column 110 bear the construction load first.

That is, in a high-strength steel having a high yield strength (for example, a yield strength of 600 MPa or more), the yield strain is larger than the strain at the time of compressive failure of the concrete. Accordingly, when the composite member is used as a composite member of steel-concrete, the concrete is first broken and the material performance of the steel is not fully utilized.

Therefore, when the inner steel pipe column 110 is made of a high strength steel and the concrete load is imposed on the inner steel pipe column 110, the steel pipe constituting the inner steel pipe column 110, 150), it is possible to utilize the material more efficiently.

That is, in order to install the steel concrete composite post structure 100, the inner steel pipe column 110 is first installed, and then a horizontal member such as a slab or the like is installed to make the installation load, An outer steel pipe column 130 may be provided. After the first concrete 150 is installed, the second concrete part 170 may be installed.

As described above, according to the present invention, it is possible to assemble a variety of materials in comparison with a synthetic column composed of a single steel pipe, and thus the construction order can be different.

However, the order of installation of the composite column structure 100 is exemplified as a preferable construction method in order to allow the person skilled in the art to easily carry out the present invention. In addition to the above- Depending on the situation in the site, it may be modified in a different order or some additional process may be added. For example, after the composite pillars 100 are integrally installed, the overall load of the composite pillars 100 can be increased.

3, the steel concrete composite post structure 100 further includes a joining portion 190 coupled to the inner steel pipe column 110 and provided for joining other columns or horizontal members can do.

Preferably, the joint 190 may include a body portion 191 having the same cross section as the inner steel pipe column 110, and may have an outwardly extending extension portion 193.

That is, the joining portion 190 includes a body portion 191 having a predetermined height and having the same cross section as the inner steel pipe column 110, a hollow portion 195 formed in the body portion 191, And an extension 193 extending outwardly from the base 191.

In this case, the body portion 191 may be formed in a cylindrical shape when the inner steel tube column 110 is formed of a circular steel pipe, and the lower end may be coupled to the upper end of the inner steel pipe column 110. However, the cross section of the body portion 191 is not limited to a circular shape but may be formed along the cross section of the inner steel pipe column 110 as described above.

The extension portion 193 may be formed in a plurality of portions and may be formed to be longer than the body portion 191 at the lower end to be partially connected to the upper inner side of the outer steel pipe column 130.

The extension portion 193 shown in FIG. 3 is formed in a cross shape to engage with four surfaces of the outer steel pipe column 130 formed of a rectangular steel pipe. However, the shape of the extension part 193 is not limited to the cross shape, and various forms are possible as long as it is coupled to the body part 191 and can be joined to a horizontal member or another column as described later. In particular, the shape of the extension 193 is preferably determined according to the structure of the building.

The joining portion 190 may be configured to connect the upper and lower synthetic pillars or to connect the horizontal member to the synthetic pillars 100, so that various types of structures can be used.

That is, when the composite pillar 100 is to be composed of a plurality of layers depending on the height of the structure, other pillars can be joined to the body portion 191 and the extension portion 193 by welding or the like.

The joining portion 190 may be formed by a horizontal member having various structures such as a reinforced concrete beam and a steel beam used as a horizontal member of an architectural structure by using an extension portion 193 and a plurality of holes 197, So that it can be joined to the column 100.

More preferably, a plurality of holes 197 may be formed in the bonding portion 190.

At this time, the plurality of holes 197 may be formed in the body portion 191 and the extension portion 193 of the joining portion 190. Accordingly, as described above, the horizontal members of various types can be joined together, and in particular, the reinforcing bars 200 can be formed to pass through when the reinforced concrete beams are connected.

4 and 5 show a state in which a reinforced concrete beam is installed in the steel concrete composite column structure 100 of the present invention.

The Reinforced Concrete Beam (RC beam), which is a horizontal member, is shown using a reinforcing bar 200 on the tensile side of a concrete beam, and the concrete is made to be subjected to compression. At this time, the reinforcing bars 200 pass through the holes 197 and can be integrally coupled with the joining portion 190 and the composite column 100 connected thereto.

Meanwhile, FIG. 6 shows a state in which the steel beam 210 is installed on the steel concrete composite post structure 100 of the present invention.

The steel frame beam 210 is a beam member joined to a column member of a building structure. The steel frame beam is generally used in a wide range of fields including H-shaped steel, I-shaped steel or other assembled beams. Can be appropriately designed and used accordingly. 6 shows an embodiment in which a steel beam 210 of H-shaped steel is joined to the composite pillar 100. FIG.

That is, the web of the steel beam 210 constituted by the H-shaped steel can be joined to the extending portion 193 of the joining portion 190. At this time, the connection between the extension part 193 and the web of the steel bar 210 may be performed by bolting the plate 230 as shown in the figure.

4 to 6, concrete is inserted into the joint 190 after the reinforcing concrete beam or the steel beam 210 is connected to the joint 190, so that the joining between the column and the horizontal member is performed It can be solid.

Since the installation sequence of the composite column 100 can be varied as described above, it is possible to install the internal steel tube column 110, install the joint portion 190, and install the first concrete 150 The steel bar 210 and the like can be joined. Further, when connecting the upper and lower composite pillars, concrete may be installed outside the joint 190.

At this time, the joining portion 190 may be formed of a metal material to increase the strength, and may provide a restraining effect to the concrete placed therein.

Thus, the use of the joint 190 of the steel concrete composite post structure 100 can provide various types of architectural structures.

In addition, since the composite column structure 100 is configured such that the characteristics of the material of the steel material and the concrete are sufficiently utilized, structural safety can be secured. Further, the cross-section of the column member can be minimized, which is advantageous for securing space.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention, It will be appreciated that those skilled in the art will readily understand the present invention.

100: Steel concrete composite column structure 110: Internal steel pipe column
130: external steel pipe column 150: first concrete part
170: second concrete part 190: joint part
193: extension part 195: hollow part
197: hole 200: reinforcing bar
210: steel beam 230: plate

Claims (7)

  1. Internal steel pipe columns;
    An outer steel pipe column provided on the outside with an interval from the inner steel pipe column;
    A first concrete part laid inside the inner steel pipe column; And
    A second concrete portion laid between the inner steel pipe column and the outer steel pipe column;
    Lt; / RTI >
    Wherein the inner steel pipe column is made of a round steel pipe having a yield strength of 600 MPa or more,
    Wherein the first concrete portion has higher strength than the second concrete portion and the first concrete portion is made of high strength concrete having a compressive strength of 60 MPa or more.
  2. delete
  3. The method according to claim 1,
    Wherein the outer steel pipe column is made of a rectangular steel pipe.
  4. delete
  5. The method according to claim 1,
    Further comprising a joining portion joined to the inner steel pipe column and provided for joining the other column or the horizontal member.
  6. 6. The method of claim 5,
    Wherein the joining portion includes a body portion having the same cross section as the inner steel pipe column, and has an outwardly extending extension portion.
  7. The method according to claim 6,
    Wherein a plurality of holes are formed in the joining portion.
KR1020100136089A 2010-12-27 2010-12-27 Compisite column structure for steel and concrete KR101767677B1 (en)

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Application Number Priority Date Filing Date Title
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KR101767677B1 true KR101767677B1 (en) 2017-08-11

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Publication number Priority date Publication date Assignee Title
KR102075165B1 (en) 2012-09-06 2020-02-07 주식회사 포스코 Concrete filled tubular column and connecting structure of the same and construction method thereof
CN103541547B (en) * 2013-01-09 2016-06-22 山东科技大学 A kind of building method of built-in hollow-out steel pipe steel fiber concrete protective layer
KR101518622B1 (en) * 2013-11-27 2015-05-11 주식회사 포스코 Joint structure of compisite column and beam
KR20160085107A (en) * 2015-01-07 2016-07-15 (주)센벡스 Bracket for column
CN104712099B (en) * 2015-03-15 2017-06-16 北京工业大学 The built-in concrete filled steel tube combined huge size post of odd-shaped cross section multi-cavity steel tube and the practice
KR101645667B1 (en) * 2015-04-28 2016-08-08 조상규 Building construction method using precast column with a progressive collapse prevention part included in rigidity reinforcement means
KR101636471B1 (en) * 2015-05-14 2016-07-20 삼성물산 주식회사 Reinforced concrete column structure
CN105421780B (en) * 2015-10-26 2018-08-17 国强建设集团有限公司 A kind of construction method of prefabricated concrete structure
KR101866317B1 (en) 2016-06-13 2018-06-12 한국건설기술연구원 Column Structure

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