KR101566992B1 - Assembly typed cft column structure - Google Patents

Assembly typed cft column structure Download PDF

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Publication number
KR101566992B1
KR101566992B1 KR1020150079242A KR20150079242A KR101566992B1 KR 101566992 B1 KR101566992 B1 KR 101566992B1 KR 1020150079242 A KR1020150079242 A KR 1020150079242A KR 20150079242 A KR20150079242 A KR 20150079242A KR 101566992 B1 KR101566992 B1 KR 101566992B1
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South Korea
Prior art keywords
column
shell
vertical
reinforcing bar
pair
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KR1020150079242A
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Korean (ko)
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채일수
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주식회사 아이에스중공업
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/30Columns; Pillars; Struts
    • E04C3/34Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
    • 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
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders

Abstract

The present invention relates to a column structure for constructing a CFT column by filling a concrete in an enclosed space inside, wherein a pair of long-side outer plates and a pair of other short-side outer plates are assembled by welding to form a box- Wherein a pair of outer shells of the outer shell of the long side and the shell shell of the short side shell are thicker than a pair of other shell shells of the remaining shells, And a vertical reinforcing member to be embedded in the concrete to be filled in the vertical reinforcing member.

Description

[0001] ASSEMBLY TYPED CFT COLUMN STRUCTURE [0002]
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a column structure for constructing a concrete filled steel tube (CFT) column by filling concrete in an inner closed space, more specifically, by constructing a column structure by welding, To an assembly type CFT column structure having various cross sections and structures.
The plan to increase the land use rate due to the rise in land prices is changing the tendency to construct a vertical structure of two or more layers of multi-storey structures that previously had constructed buildings such as factories and warehouses with single-storey horizontal structures.
However, the application of the steel frame structure of the H-shaped steel, which has been generally applied to the horizontally structured structures of the single layer, to the multi-layered structures such as the vertical structure, There is a problem in that the amount of steel material used is increased and the amount of fireproof construction is greatly increased, resulting in poor economical efficiency. In addition, there are problems that the space utilization rate is low and vulnerable to vibration.
On the other hand, members of the CFT structure constituted by charging concrete into steel pipes previously prepared by roll forming have attracted attention because they exhibit high rigidity at low cost.
The above-mentioned CFT structure can increase the compressive strength by restricting the concrete by restraining the steel pipe, and the concrete can reduce the local buckling of the steel pipe, thereby greatly improving the strength, fire resistance and workability as well as reducing the cross- It can be said that it is very economical.
However, the steel pipes used in the general CFT structure are integrally manufactured. In the case of using the steel pipe as a column member, a diaphragm is usually installed to join the steel to the steel.
Such a diaphragm is divided into an inner diaphragm to be inserted into a steel pipe, an outer diaphragm provided on the outer surface of the steel pipe in an outer shape, and a through diaphragm to penetrate the steel pipe, and an inner diaphragm In order to install the penetrating diaphragm, it is necessary to perform a separate processing step such as cutting the steel pipe, so there is a problem in the precision of the reassembling. In the case of the external diaphragm, the construction error due to the verticalness of the column is corrected There is a problem in that the construction is very cumbersome because it needs to be cut and installed.
In addition, it is difficult to dispose the reinforcing bars for reinforcing the concrete in the steel pipe integrally manufactured therein, so there is a limit to increase the strength against the same cross section.
On the other hand, there is a fear that a slip phenomenon may occur between the steel pipe and the concrete filled in the steel pipe. Various methods for installing the shear joint material therein have been studied, for example, in Registration No. 10-1203729 Quot; a steel pipe for filling with steel pipe body rigidity increasing means "
As shown in FIG. 7, the steel pipe includes a steel pipe body 11 having a filling space S filled with a filler; And a filler contact area expanding part provided so as to increase the rigidity of the steel pipe body (11) by expanding the contact area with respect to the filler, And an extension part connected to the filler contact area expanding part, the filler contact area expanding part being positioned between the inner surface of the steel pipe body and the inner surface of the steel pipe body, wherein the filler is filled in the steel pipe body rigidity increasing means, Characterized in that at least one passage opening (15) for increasing the strength of resistance of the body rigidity increasing means (12) is formed.
The steel pipe according to the prior art is provided with the rigidity enhancing means 12 while expecting the effect that the filling material (concrete) and the steel pipe are integrated with each other through the rigidity increasing means 12, It is expected that the effect of reinforcing the concrete will be enhanced by increasing the steel amount of the concrete. However, although the restraining effect of the concrete is premised on that the concrete is filled tightly inside the steel pipe, So that it is not easy to securely install the rigidity increasing means 12 in the closed filling space S, and it is not easy to bend an expensive steel plate to form a pipe- It takes a lot of cost to manufacture the stiffness enhancing means for forming the extending portion and the plate-shaped extending portion, Column - The consideration for the beam joint structure, there is a limit to the application in the target point does not completely made.
KR 10-1203729 B1
The present invention has been made to solve the problems of the prior art described above, and it is an object of the present invention to provide a pillar structure capable of ensuring complete integrity between the column structure and concrete, facilitating a tight filling of the concrete inside the column structure, The present invention has been made in view of the above problems.
Further, the present invention facilitates the placement of vertical reinforcing bars that can share the axial force generated on the pillars while reinforcing the inner concrete, thereby reducing the cross-section of the pillars, and having a strong bonding structure with the beam structure, The present invention has another object to provide a column structure capable of reducing the number of column structures.
According to a most preferred embodiment of the present invention for solving the above problems, there is provided a column structure for constructing a CFT column having a cross section of a square steel box, wherein a pair of long-side outer plates and a pair of short- And a pair of the outer sheaths of the outer sheath and the short-side outer sheath are thicker than a pair of the other outer sheaths, and the long-side outer sheath and the short- Wherein the pair of outer plates is provided with a vertical reinforcing member to be embedded in the concrete filled in the closed space.
According to another embodiment of the present invention, the vertical reinforcement body comprises a vertical reinforcing bar spaced from the outer plate, and a connecting reinforcing bar connecting the vertical reinforcing bar and the outer panel.
According to another embodiment of the present invention, the vertical reinforcement body is constructed such that one connecting reinforcing bar is attached to only one side of the vertical reinforcing bars on the transverse section of the vertical reinforcing body.
According to another embodiment of the present invention, the connecting reinforcing bars are formed in a shape in which the convex portions and the concave portions are continuous, and the vertical reinforcing bars are attached to the side surfaces of the connecting reinforcing bars at positions spaced inward from the ends of the convex portions of the connecting reinforcing bars Wherein the CFT column structure includes a plurality of CFT columns.
According to another embodiment of the present invention, both end portions of the outer shell having a thicker thickness than those of the shell having the longer side and the shell having the shorter side are formed to protrude from the outer side of the shell having a smaller thickness,
Figure 112015054066955-pat00001
Shaped CFT column structure is provided.
The column type structure of the present invention can be different in cross section to each side so that it can efficiently cope with the kind and direction of stress and minimizes the cross section of the column through the vertical reinforcing steel to share the axial force, .
In addition, the column structure according to the present invention constitutes a vertical reinforcement body using an inexpensive reinforcing bar, and a large opening is formed between the angles of the connection reinforcing bars to achieve a tight filling of the concrete, and anchoring of the vertical reinforcement body It is possible to have a perfect integrity between the column structure and the concrete, thereby making it possible to construct high quality columns having excellent vibration resistance and fire resistance.
Further, the column structure according to the present invention allows symmetrical placement of vertical reinforcing bars while overlapping the vertical reinforcing bars provided on the opposing outside sheathing, so that it has a uniform strength against each cross section of the column, It is possible to have a stable steel joint structure with respect to a horizontal member such as a beam structure without installing it.
FIG. 1 is an exploded perspective view for explaining the entire structure of a CFT column structure according to an embodiment of the present invention.
2 is a cross-sectional view showing specific embodiments of the column structure.
3 is a partial perspective view of each embodiment for explaining the vertical reinforcement of the present invention.
4 is a partial perspective view of a vertical reinforcement according to another embodiment of the present invention.
5 is a cross-sectional view showing an example in which the opposing vertical reinforcements are overlapped in the column structure of the present invention.
6 is a cross-sectional view showing another embodiment of the lap joint structure of the vertical reinforcement of the present invention.
7 is a partial perspective view showing the interior of a steel pipe according to the prior art.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in order to obscure or obscure the technical idea of the present invention due to the detailed description of the known structure in describing the present invention, the description of the structure of the above known structure will be omitted.
FIG. 1 is a perspective view of a part of a CFT column structure (hereinafter referred to as a column structure) according to an embodiment of the present invention.
As shown in FIG. 1, the present invention is a column structure for constructing a CFT column having a cross section of a square steel box, wherein a pair of long side shell plates 110 and a pair of other short side shell plates 120 are welded to each other And a closed space of the square steel box is formed. The closed space is filled with concrete to form a CFT column having a constraining effect of concrete.
2 is a cross-sectional view of one specific embodiment of the column structure of the present invention.
As shown in FIG. 2, the column structure of the present invention forms a filling space for closed concrete by welding and joining four outer plates 100, And the material of the steel plate itself constituting the outer plate 100 can be arbitrarily selected. This makes it possible to construct CFT columns having various cross sections corresponding to various design conditions, and also to vertically reinforce the inside of the concrete It is possible to construct a CFT column having a large internal force by making it easy to install the body 200.
The column structure of the present invention may be configured to have the same thickness with respect to the entire outer plate 100 in relation to the thickness of the outer plate 100. More preferably, The pair of outer plates 100 of the inner plate 120 is made thicker than the pair of the remaining outer plates 100 so as to have a cross-section of the column capable of effectively responding to the direction of stress.
For example, when the thickness of the short-side outer panel 120 is made thicker than that of the long-side outer panel 110 as shown in FIGS. 2A to 2C, the secondary moment in the direction of the strong axis is increased, 2 (d) to 2 (f), when the thickness of the long-side outer sheath 110 is made thicker than that of the short-side outer sheath 120, It is possible to increase the stiffness of the column so as to have a rectangular column section and also to suitably apply to the two-way slab structure.
In addition, the thick outer shell 100 together with the vertical reinforcement member 200 described later can have a stable steel joint structure with respect to the column.
Next, with respect to the vertical reinforcement member 200, the column structure of the present invention has a structure in which the vertical reinforcement member 200 is attached to at least one pair of the outer plates 100 of the long-side outer plate 110 and the short- Respectively.
2 (a) and 2 (d) show an example in which the vertical reinforcement 200 is attached only to the long-side outer panel 110, and FIGS. 2 (b) (C) and (f) are examples in which the vertical reinforcement member 200 is attached to both the long-side outer shell 110 and the short-side outer shell 120. FIG. The attachment position of the vertical reinforcement member 200 can be selected according to design conditions such as the type and size of the stress acting on the column, the bonding structure of the beam, and the like
3 and 4 show concrete embodiments of the construction of the vertical reinforcement 200. As shown in FIG. The vertical reinforcement member 200 includes a vertical reinforcing bar 220 spaced from the outer panel 100 and a connecting reinforcing bar 210 connecting the vertical reinforcing bars 220 to the outer panel 100 .
The vertical reinforcement 220 reinforces the column and buckling load on the column so that it has an SRC structure with greater strength than a general CFT column of the same cross section.
The vertical reinforcement 220 is anchored to the inner concrete of the square steel box formed by the outer panel 100 together with the connection reinforcing bar 210 so that the square steel box and the concrete can have a perfect structural integrity The integration of the square steel box and the concrete makes it possible to construct a high-quality column with high economic efficiency, such as reducing the thickness of the outer plate 100 made of steel and improving the fire resistance and omitting the refractory coating.
The connecting reinforcing bar 210, which allows the vertical reinforcing bars 220 to be spaced apart from the outer panel 100 by a predetermined distance so that the vertical reinforcing bars 220 can be disposed at appropriate positions, The upper surface of the vertical reinforcement 220 may be attached to the lower surface of the vertical reinforcement 220 so that the center axis of the connection reinforcing bar 210 is aligned with the center axis of the connection reinforcement 210. Alternatively, (220).
When one reinforcing bar 210 is attached to one side of the vertical reinforcing bars 220 even when the side walls of the reinforcing bars 210 are attached to the side walls of the vertical reinforcing bars 220, 200 to overlap in a transverse plane while allowing a symmetrical arrangement with respect to the column structure cross section. This will be explained later.
The connection reinforcing bar 210 of the present invention can be formed in various shapes, but it is preferable that the connecting reinforcing bars 210 have a concavo-convex shape such as the lattice as shown in FIG. 3 (a) (212) are continuous, and more preferably, the lattice shape of FIG. 3 (a) is provided so that stress transmission to the shear force can be efficiently performed.
The connecting reinforcing bar 210 configured to be continuous between the convex portion 211 and the concave portion 212 is formed by vertically welding the concave portion 212 to the inner surface of the outside plate 100, The reinforcement member 200 is integrated and the vertical reinforcing bars 220 are welded to the convex portion 211 to be embedded in the concrete filled in the closed space so as to function as an anchoring together with reinforcement in the axial direction.
As shown in FIG. 4 (a), the vertical reinforcing bar 220 can be formed by attaching a connecting reinforcing bar 210 to the side of the vertical reinforcing bar 220, Or may be positioned at a predetermined distance inward from the end of the convex portion 211 of the connecting reinforcing bar 210 as shown in FIG. 4 (b).
When the connecting reinforcing bars 210 are attached only to one side of the vertical reinforcing bars 220, the respective vertical reinforcing bars 200 attached to the two outer plates 100 facing each other are overlapped with each other, It is possible to constitute a vertical reinforcement member 200 of a horizontal joining structure, and Fig. 5 shows these examples in cross section.
5 (a) and 5 (b) are cross-sectional views of a vertical steel reinforcing member 200 according to an embodiment of the present invention shown in FIGS. 4 (a) and 4 (b) And the inner concrete can exert a greater composite force, and the stress can be dispersed so that the column can be efficiently moved.
In addition, since the vertical reinforcement member 200 in the overlapped state performs the function of a diaphragm, it is possible to have a stable steel joint structure of a steel wire without installing a separate diaphragm.
5 (b), when the ends of the projections 211 of the connecting reinforcing bars 210 are brought into contact with the inner surface of the opposed outer shell 100, the outer shell 100 of the rectangular steel box, So that the strength of the column is greatly improved.
At this time, in order to further strengthen the above-described coupling structure with respect to each outer plate 100, though not shown, welding grooves are provided in the outer plate 100, which is in contact with the end of the convex portion 211, The protrusions 211 of the vertical reinforcement 200 facing the outer plate 100 may be welded to be integrated.
In addition, each of the vertical reinforcing bars 220 is symmetrically positioned with respect to the end face of the column structure while forming a core having a square cross-section (each dotted line portion in FIG. 5) So that stress transmission can be clarified.
6 shows another embodiment of the column structure according to the present invention.
The column structure of the present embodiment is configured such that the outer plate 100 of one of the long side outer plate 110 and the short side outer plate 120 constituting the rectangular steel box is protruded from the outer surface of the remaining outer plate 100 such that the cross section of the column structure
Figure 112015054066955-pat00002
More preferably, both end portions of the thick outer shell 100 are configured to protrude from the outer surface of the thick outer shell 100.
The cross section of such a shape not only facilitates the assembling work such as omitting the improvement process in the welding work for assembling the column structure but also prevents the local buckling of the column structure by increasing the thickness width ratio and increases the section modulus, The present invention can provide an effect of improving the performance of the apparatus.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious that it will be possible to carry out various modifications thereof. For example, in the present specification, each outer plate constituting a rectangular steel box is divided into a long-side outer plate and a short-side outer plate. However, in the case where the cross-section of the column is designed to have a strong axis and a weak axis, The columnar structure of the present invention is not particularly limited to a rectangular shape, and the outer plate and the short-side plate may have the same width. In this case, The same applies. It is therefore intended that such modifications are within the scope of the invention as set forth in the claims.
100; Shell plate 110; Long side exterior
120; Short side shell plate 200; Vertical reinforcement
210; Connecting reinforcing bar 211; Convex portion
212; Concave portion 220; Vertical rebar

Claims (5)

  1. In a column structure for constructing a CFT column having a cross section of a square steel box,
    A pair of long side shell plates 110 and a pair of other short side shell plates 120 are welded together to form a box-shaped closed space filled with concrete,
    A pair of the outer plates 100 of the long side outer plate 110 and the short side outer plate 120 is thicker than a pair of the remaining outer plates 100,
    The vertical reinforcement member 200, which is embedded in the concrete filled in the closed space, is attached to at least one pair of the outer plates 100 of the long-side outer plate 110 and the short-side outer plate 120,
    The vertical reinforcement member 200 includes a vertical reinforcing bar 220 spaced from the outer panel 100 and a vertical reinforcing bar 220 having a continuous shape of the convex portion 211 and the concave portion 212, And a connecting reinforcing bar 210 connecting between the vertical reinforcing bars 200 and 100. The connecting reinforcing bars 210 are attached to only one side of the vertical reinforcing bars 220 on the cross- CFT column structure.
  2. delete
  3. delete
  4. The connecting reinforcing bar according to claim 1, wherein the connecting reinforcing bar has a shape in which the convex portion and the concave portion are continuous with each other, Is attached to the side surface of the connecting reinforcing bar (210) at a position spaced inward from the end of the connecting reinforcing bar (210).
  5. 2. The columnar structure according to claim 1, wherein both end portions of the thick outer shell (100) of the outer shell (110) and the shell shell (120) are protruded from the outer surface of the shell
    Figure 112015054066955-pat00003
    Wherein the CFT column structure comprises a plurality of CFT columns.
KR1020150079242A 2015-06-04 2015-06-04 Assembly typed cft column structure KR101566992B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101734107B1 (en) * 2016-12-13 2017-05-24 주식회사 아이에스중공업 Cft column structure with the diaphragm and the manufacturing method thereof
KR101804171B1 (en) * 2016-07-22 2017-12-04 주식회사 씨엠파트너스건축사사무소 Cft column structure with the vertical internal diaphragm
KR20190002101A (en) * 2017-06-29 2019-01-08 주식회사 포스코 Hollow Structure, and Structure of Connecting Column and Beam
KR102147047B1 (en) 2020-03-16 2020-08-21 한우물중공업 주식회사 Cft column structure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101134460B1 (en) * 2011-07-11 2012-04-13 (주)엠씨에스에스티기술사사무소 Steel beam with lattice bar and the construction method therefor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101134460B1 (en) * 2011-07-11 2012-04-13 (주)엠씨에스에스티기술사사무소 Steel beam with lattice bar and the construction method therefor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101804171B1 (en) * 2016-07-22 2017-12-04 주식회사 씨엠파트너스건축사사무소 Cft column structure with the vertical internal diaphragm
KR101734107B1 (en) * 2016-12-13 2017-05-24 주식회사 아이에스중공업 Cft column structure with the diaphragm and the manufacturing method thereof
KR20190002101A (en) * 2017-06-29 2019-01-08 주식회사 포스코 Hollow Structure, and Structure of Connecting Column and Beam
KR102131488B1 (en) * 2017-06-29 2020-07-07 주식회사 포스코 Hollow Structure, and Structure of Connecting Column and Beam
KR102147047B1 (en) 2020-03-16 2020-08-21 한우물중공업 주식회사 Cft column structure

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