KR100955657B1 - Joint construction method of CFT column ? RC member using reinforcement assembly - Google Patents

Joint construction method of CFT column ? RC member using reinforcement assembly Download PDF

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KR100955657B1
KR100955657B1 KR1020070138396A KR20070138396A KR100955657B1 KR 100955657 B1 KR100955657 B1 KR 100955657B1 KR 1020070138396 A KR1020070138396 A KR 1020070138396A KR 20070138396 A KR20070138396 A KR 20070138396A KR 100955657 B1 KR100955657 B1 KR 100955657B1
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South Korea
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horizontal
reinforcing bar
steel pipe
column
vertical
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KR1020070138396A
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Korean (ko)
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KR20090070398A (en
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최성모
채흥석
방중석
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서울시립대학교 산학협력단
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/30—Structures 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/185—Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21—Connections specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing 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

본 발명은 CFT기둥과 RC보 또는 RC슬래브의 접합부를 시공하기 위한 방법에 관한 것으로서, (a)강관기둥을 기둥위치에 설치하고, RC보 또는 RC슬래브의 시공을 위한 수평거푸집을 설치하는 단계; (b)다수개의 수직철근, 다수개의 수평띠철근, 다수개의 수평철근, 다수개의 수직띠철근이 서로 구속되어 하나의 조립체로 조립된 철근조립체를 설치하되, 철근조립체의 수직철근 하부가 강관기둥에 끼워지면서 철근조립체의 수평철근이 수평거푸집 위로 배치되도록 설치하는 단계; (c)강관기둥 내부와 수평거푸집 위로 콘크리트 타설하되, 철근조립체의 수평철근이 완전히 매입되면서 철근조립체의 수직철근 상부가 노출되도록 타설하는 단계; 그리고, (d)노출된 철근조립체의 수직철근 상부를 수용하면서 콘크리트 표면 위로 강관기둥을 설치하는 단계;를 포함하여 이루어지는 것을 특징으로 한다.The present invention relates to a method for constructing a joint of a CFT column and a RC beam or RC slab, comprising the steps of: (a) installing a steel pipe column at a column position and installing a horizontal formwork for the construction of an RC beam or RC slab; (b) Install a reinforcing bar assembly, in which a plurality of vertical reinforcing bars, a plurality of horizontal band reinforcing bars, a plurality of horizontal reinforcing bars and a plurality of vertical band reinforcing bars are restrained from each other and assembled into a single assembly, and the lower part of the vertical reinforcing bar of the reinforcing bar Installing the horizontal reinforcement of the reinforcing bar assembly to be disposed on the horizontal formwork while being fitted; (c) placing concrete on the inside of the steel pipe column and the horizontal formwork, while placing the horizontal reinforcing bars of the reinforcing bar completely exposed so as to expose the upper portion of the vertical reinforcing bars of the reinforcing bar assembly; And (d) installing a steel pipe column on the concrete surface while accommodating an upper portion of the vertical rebar of the exposed rebar assembly.

CFT, RC, 선조립철근, 접합부 CFT, RC, Prefabricated Rebar, Joint

Description

선조립철근을 이용한 ＣＦＴ기둥과 ＲＣ부재의 접합부 시공방법{Joint construction method of CFT column ＆ RC member using reinforcement assembly}Joint construction method of CFT column & RC member using reinforcement assembly}

본 발명은 CFT기둥과 RC보 또는 RC슬래브의 접합부를 시공하기 위한 방법에 관한 것으로서, 더욱 상세하게는 층간 높이의 강관기둥을 시공단위로 하면서 수직철근과 수평철근이 조립된 선조립철근을 이용함으로써 접합부의 구조적인 안정성은 물론 CFT구조와 RC구조의 이점을 동시에 실현한 CFT기둥과 RC부재의 접합부 시공방법에 관한 것이다.The present invention relates to a method for constructing a joint between a CFT column and an RC beam or an RC slab, and more specifically, by using a prefabricated steel bar in which vertical and horizontal rebars are assembled while using a steel pipe column having an interlayer height as a construction unit. The present invention relates to a method of constructing a joint of a CFT column and a RC member, which simultaneously realizes the advantages of the CFT structure and the RC structure.

CFT(Concrete Filled steel Tube)는 강관에 콘크리트를 충전하여 강관이 콘크리트를 구속하도록 한 콘크리트충전강관을 말하며, CFT를 골조 중 기둥에 채용하여 고축력에 저항하도록 한 구조를 CFT구조라 한다. CFT 구조는 강성, 내력, 변형 등 구조적으로 안정하고 내화, 시공, 비용 등에서 우수한 장점을 가지므로, 이를 현장에 적용하기 위해 다양한 연구가 진행되고 있는 실정이다. CFT (Concrete Filled Steel Tube) refers to a concrete filled steel tube in which steel pipes are confined by filling concrete into steel pipes. CFT is a structure that adopts a CFT to a column in a frame to resist high axial force. CFT structure is structurally stable such as stiffness, strength, and deformation, and has excellent advantages in fire resistance, construction, and cost, and thus, various studies are being conducted to apply it to the field.

RC(Reinforced Concrete)구조는 철근과 콘크리트가 일체화된 구조로서, 현장에서 습식의 콘크리트가 타설되기 때문에 일체성 확보에 유리한 구조이다. 다만, 습식의 콘크리트를 타설하기 위해 거푸집, 동바리 등 각종 가설재 설치작업이 수반되므로 현장작업이 번거롭다는 단점이 있다.RC (Reinforced Concrete) structure is a structure in which reinforcing steel and concrete are integrated, and it is advantageous to secure the integrity because wet concrete is poured in the field. However, there is a disadvantage in that field work is cumbersome because installation work of various temporary materials such as formwork, copper barks, etc. is required to pour wet concrete.

상기와 같은 CFT구조(CFT기둥)와 RC구조(RC보 또는 RC슬래브)를 적절히 접목시키면 양 구조의 단점을 상쇄하면서 장점에 따른 상승효과를 기대할 수 있을 것인데, 본 발명은 이러한 양 구조의 결합에 관한 것이다.Properly combining the above CFT structure (CFT column) and RC structure (RC beam or RC slab) can be expected to synergistic effect according to the advantages while canceling the disadvantages of both structures, the present invention is to combine the two structures It is about.

한편, CFT기둥과 RC부재(RC보 또는 RC슬래브)의 접합부는 중력하중에서 기인하는 전단력을 RC부재에서 CFT기둥으로 원활하게 전달할 수 있도록 설계되어야 하므로, 접합부에는 어떤 형식으로든 전단에 저항하기 위한 전단키(Shear Key)의 도입이 고려된다. 특히, CFT기둥과 RC무량판의 접합부의 경우에는 전단키가 충분히 마련되지 않는다면 펀칭전단에 의한 파괴가 일어난다.On the other hand, the joint part of the CFT column and the RC member (RC beam or RC slab) should be designed to smoothly transfer the shear force resulting from the gravity load from the RC member to the CFT column, so that the joint has a shear key for resisting shear in any form. The introduction of a shear key is considered. In particular, in the case of the junction portion between the CFT column and the RC flat plate, if the shear key is not sufficiently provided, the fracture by the punching shear occurs.

도 1은 종래의 방법에 따라 완성한 CFT기둥과 RC부재의 접합부를 보여주는데, 도시하고 있는 바와 같이 종래에는 철골기둥과 마찬가지로 2~3개층 높이를 1절의 시공단위로 하여 CFT기둥을 시공하고 1절의 CFT기둥 중간에서 강관기둥 외표면에 RC부재를 시공하는 형태로 완성하여 왔다. 도 1(a)는 강관기둥 외표면에 브라켓을 접합한 후 브라켓의 RC부재에 매입시키는 방법으로 접합부를 구성한 예이고, 도 1(b)는 강관기둥 외표면에 스터드를 접합하여 RC부재에 매입되도록 하면서 RC부재에 매입된 철근이 강관기둥을 관통하도록 배근시키는 방법으로 접합부를 구성한 예이다.Figure 1 shows the junction of the CFT column and the RC member completed according to the conventional method, as shown in the prior art, as in the steel pillars, the construction of the CFT column with the height of 2-3 layers as a unit of construction of 1 section and the CFT of 1 section It has been completed in the form of RC member on the outer surface of the steel pipe column in the middle of the column. Figure 1 (a) is an example in which the joint is configured by joining the bracket to the outer surface of the steel pipe pillar and embedded in the RC member of the bracket, Figure 1 (b) is embedded in the RC member by bonding a stud to the outer surface of the steel pipe pillar It is an example in which the joint is constructed in such a way that the reinforcing bar embedded in the RC member penetrates the steel pipe column.

하지만, 도 1(a)와 같은 접합부의 구성은 전단키로 브라켓만을 마련하여 강관기둥에 브라켓을 직접 용접하기 때문에, 용접에 따른 강관기둥의 변형 문제와 용접불량시의 안정성 문제가 우려된다. 또한, 도 1(b)의 접합부의 구성은 전단키로 스터드 외에 관통배근철근을 마련하고 서로 보완하도록 하고 있지만, 강관기둥에 구멍을 가공해야 하므로 추가가공에 따른 제작공정상의 불편함이 우려되며 아울러 용접접합에 따른 강관기둥의 변형 문제가 여전히 우려된다.However, in the configuration of the joint as shown in FIG. 1 (a), since the bracket is directly welded to the steel pipe column by providing only the bracket with a shear key, the deformation problem of the steel pipe column due to welding and the stability problem at the time of poor welding are concerned. In addition, the configuration of the junction portion of FIG. 1 (b) is to provide through reinforcing bar reinforcement in addition to the stud with a shear key to complement each other, but the hole in the steel pipe pillar must be machined, there is a fear of inconvenience in the manufacturing process due to additional processing and welding The problem of deformation of the steel pipe columns due to the joining is still a concern.

본 발명은 상기한 종래의 문제를 개선하고자 개발된 것으로서, 종래의 2~3개층 1절의 시공단위에서 탈피하여 1개층 층간 높이의 강관기둥을 시공단위로 하면서 수직철근과 수평철근이 조립된 선조립철근을 이용함으로써 용접 내지 구멍 가공에 따른 문제를 원천적으로 해결하면서 CFT구조와 RC구조의 이점을 동시에 실현한 CFT기둥과 RC부재의 접합부 시공방법을 제공하는데 기술적 과제가 있다.The present invention was developed in order to improve the above-described problems, and the vertical assembly of the reinforcing bar and the horizontal reinforcing bar while the steel pipe column of the height of one layer to the construction unit to break away from the conventional construction unit of two to three layers There is a technical problem to provide a method for constructing a joint portion of a CFT column and a RC member which simultaneously realizes the advantages of the CFT structure and the RC structure while solving the problems caused by welding or hole processing by using reinforcing bars.

상기한 기술적 과제를 해결하기 위해 본 발명은 CFT기둥과 RC보 또는 RC슬래브의 접합부를 시공하기 위한 방법으로서,In order to solve the above technical problem, the present invention is a method for constructing the junction of the CFT column and RC beam or RC slab,

(a)강관기둥을 기둥위치에 설치하고, RC보 또는 RC슬래브의 시공을 위한 수평거푸집과 동바리를 설치하는 단계; (b)다수개가 서로 평행하게 이격 배치된 수직철근, 상기 다수개의 수직철근을 둘러 감으면서 결속 설치된 수평띠철근, 상기 다수개의 수직철근 중간에서 수평으로 가로지르도록 배치되어 상기 수직철근 또는 수평띠철근에 구속 설치되는 한편 다수개가 서로 평행하게 이격 배치된 수평철근, 상기 다수개의 수평철근을 둘러 감으면서 결속 설치된 수직띠철근이 하나의 집합체로 조립된 철근조립체를 설치하되, 철근조립체의 수직철근 하부가 강관기둥에 끼워지면서 철근조립체의 수평철근이 수평거푸집 위로 배치되도록 설치하는 단계; (c)강관기둥 내부와 수평거푸집 위로 콘크리트 타설하되, 철근조립체의 수평철근이 완전히 매입되면서 철근조립체의 수직철근 상부가 노출되도록 타설하는 단계; 그리고, (d)노출된 철근조립체의 수직철근 상부를 수용하면서 콘크리트 표면 위로 강관기둥을 설치하는 단계;를 포함하여 이루어지는 것을 특징으로 하는 선조립철근을 이용한 CFT기둥과 RC부재의 접합부 시공방법을 제공한다.(a) installing the steel pipe column in the column position, and installing horizontal formwork and copper bar for construction of RC beam or RC slab; (b) a plurality of vertical rebars arranged parallel to each other, horizontal band reinforcing bars bound to wrap around the plurality of vertical bars, arranged to cross horizontally in the middle of the plurality of vertical bars the vertical reinforcing bars or horizontal band reinforcing bars While horizontally installed reinforcing the plurality of parallel rebars are arranged parallel to each other, while installing the reinforcing bar assembly is assembled with a vertical band reinforcing bars are assembled as a group around the plurality of horizontal reinforcement, the bottom of the vertical reinforcement of the reinforcement assembly Installing the horizontal reinforcement of the reinforcing bar assembly over the horizontal formwork while being fitted in the steel pipe column; (c) placing concrete on the inside of the steel pipe column and the horizontal formwork, while placing the horizontal reinforcing bars of the reinforcing bar completely exposed so as to expose the upper portion of the vertical reinforcing bars of the reinforcing bar assembly; And (d) installing a steel pipe column on the concrete surface while accommodating the upper portion of the vertical rebar of the exposed reinforcing bar assembly. do.

본 발명에 따르면, 종래의 2~3개층 1절의 시공단위에서 탈피하여 1개층 층간 높이의 강관기둥을 시공단위로 하면서 수직철근과 수평철근이 조립된 선조립철근을 이용하기 때문에 용접 내지 구멍 가공에 따른 문제를 원천적으로 해결하면서 더욱 일체성이 강화된 CFT기둥과 RC부재의 접합부로 완성할 수 있게 된다.According to the present invention, since the steel pipe column of the height of one layer is used as the construction unit by breaking away from the conventional construction unit of 1 to 2 layers of three layers, the use of prefabricated reinforcing bars in which vertical and horizontal rebars are assembled is used for welding or hole processing. While solving the problem inherently, it is possible to complete the joint of the reinforced CFT pillar and RC member further strengthened.

이하, 첨부한 도면 및 바람직한 실시예에 따라 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

도 2는 본 발명에 따른 CFT기둥과 RC부재의 접합부 시공방법을 보여주는 시 공순서도이고, 도 3은 도 2의 시공순서에 따라 완성한 CFT기둥과 RC부재의 접합부를 보여주는 상세단면도이며, 도 4는 CFT기둥과 RC부재의 접합부 시공에서 이용되는 철근조립체의 일례를 보여준다. 2 is a time sequence diagram showing the construction method of the joint portion of the CFT column and RC member according to the present invention, Figure 3 is a detailed cross-sectional view showing the joint portion of the CFT column and RC member completed in accordance with the construction sequence of Figure 2, Figure 4 An example of the reinforcing bar assembly used in the construction of the junction of the CFT column and the RC member is shown.

본 발명은 1개층 층간 높이의 강관기둥(10)을 하나의 시공단위로 채택하여 CFT기둥과 RC부재의 접합부를 전체적으로 현장시공의 RC구조로 완성함으로써 RC부재가 연속성을 가지도록 시공한다는 점과, 현장시공의 RC구조 접합부를 선조립철근을 이용하여 시공한다는데 특징이 있다. 이로써 강관기둥(10) 외표면에 별도의 전단키(브라켓, 스터드 등)를 용접하거나 강관기둥(10)에 구멍을 형성시켜 철근을 관통 배근할 필요없이 간단하게 CFT기둥과 RC부재가 일체화된 복합구조를 완성할 수 있게 된다. The present invention adopts a steel pipe pillar (10) having a height of one layer between floors as a unit of construction to complete the junction of the CFT column and the RC member as a RC structure of the field construction as a whole to construct the RC member to have a continuity, It is characterized by constructing RC structural joints of field construction using pre-assembled rebar. This makes it possible to weld a separate shear key (bracket, stud, etc.) on the outer surface of the steel pipe pillar 10 or to form a hole in the steel pipe pillar 10 so that the CFT pillar and the RC member are simply integrated without the need to penetrate the rebar. Will be able to complete.

본 발명의 CFT기둥과 RC부재의 접합부 시공방법을 도 2를 참고하여 단계적으로 설명하면 다음과 같다.Referring to Figure 2 step by step construction method of the junction portion of the CFT column and RC member of the present invention as follows.

(a)강관기둥 설치(a) Steel Pipe Column Installation

강관기둥(10)을 기둥위치에 설치하고, RC보 또는 RC슬래브의 시공을 위한 수평거푸집(F)을 설치한다. 이때의 강관기둥(10)은 하부층의 CFT기둥을 구성한다. 강관기둥(10)은 1개층의 층간높이를 하나의 시공단위로 마련하며, 강관기둥(10)의 설치상태를 안정적으로 유지하기 위해서 강관기둥(10)을 지지하는 버팀때(B)를 설치할 수 있다. 수평거푸집(F)은 보거푸집 또는 슬래브거푸집이 되며, 수평거푸집(F)으로는 콘크리트(30) 타설 후 제거되는 탈형거푸집은 물론 콘크리트(30)와 일 체화되어 제거되지 않은 영구거푸집도 채택할 수 있다. 또한, 수평거푸집(F)을 지지하는 동바리(S)를 별도 설치할 수 있으며, 다만 수평거푸집(F) 그 자체가 타설되는 콘크리트(30)의 자중과 타설압을 충분히 지지할 수 있다면 동바리(S) 설치를 생략할 수도 있다.Steel pipe pillar 10 is installed in the column position, install a horizontal formwork (F) for the construction of RC beams or RC slabs. The steel pipe pillar 10 at this time constitutes a CFT pillar of the lower layer. The steel pipe column 10 provides the height of one floor in one construction unit, and in order to maintain the installation state of the steel pipe column 10 stably, a support (B) supporting the steel pipe column 10 may be installed. have. The horizontal formwork (F) becomes a formwork or slab formwork, and the horizontal formwork (F) can adopt a formwork that is removed after the concrete 30 is poured, as well as a permanent formwork that is not removed by being integrated with the concrete 30. have. In addition, it is possible to separately install the copper bar (S) for supporting the horizontal formwork (F), but if the horizontal mold (F) itself can sufficiently support the weight and pouring pressure of the concrete (30) to be poured copper bar (S) You can also skip the installation.

특히, 본 단계에서 설치되는 강관기둥(10)은 그 상부 내측면 즉, 접합부와 근접한 위치에 스터드(11)가 더 접합되도록 마련하는 것이 바람직한데, 스터드(11)는 강관기둥(10)과 그 내부에 타설된 콘크리트(30)와의 구속력을 증대시켜 접합부의 내력을 보강하는 역할을 한다. In particular, the steel pipe pillar 10 is installed in this step is preferably provided so that the stud 11 is further bonded to the upper inner surface, that is, the position close to the junction, the stud 11 is a steel pipe pillar 10 and its It increases the restraint force with the concrete 30 placed in the interior serves to reinforce the strength of the joint.

(b)철근조립체 설치(b) Rebar assembly installation

강관기둥(10)을 설치하고 나면 강관기둥(10) 위로 RC부재가 연속성을 가지도록 시공하게 되는데, 이를 위해 본 발명은 선조립철근을 이용한다.After the installation of the steel pipe pillar (10) is to be constructed so that the RC member has a continuity over the steel pipe pillar (10), the present invention uses a pre-assembled rebar.

특히, 본 발명에서는 선조립철근으로, 다수개가 서로 평행하게 이격 배치된 수직철근(21); 상기 다수개의 수직철근을 둘러 감으면서 결속 설치된 수평띠철근(22); 상기 다수개의 수직철근(21) 중간에서 수평으로 가로지르도록 배치되어 상기 수직철근 또는 수평띠철근에 구속 설치되는 한편 다수개가 서로 평행하게 이격 배치된 수평철근(25); 상기 다수개의 수평철근(25)을 둘러 감으면서 결속 설치된 수직띠철근(26);이 하나의 집합체로 조립된 철근조립체(20)를 제안한다. 상기 철근조립체(20)에서 수직철근(21)과 수평띠철근(22)은 곧 기둥철근이 되고, 상기 수평철근(25)과 수직띠철근(26)은 곧 보철근 또는 슬래브철근이 되며, 수직철근(21)과 수평철근(25)이 서로 만나지 않고 상하좌우로 돌출된 부분은 곧 정착길이가 된다. 도 4는 철근조립체(20)의 일례를 보여주는데, 수직철근(21)과 수평띠철근(22)이 원형으로 배근된 예로서 CFT기둥이 원형기둥으로 설계되는 경우에 적용할 수 있다. In particular, in the present invention, as a pre-assembled reinforcing bar, a plurality of vertical reinforcing bar 21 is disposed parallel to each other; Horizontal band reinforcing bar 22 is installed while winding the plurality of vertical bars; Horizontal reinforcing bars (25) disposed to cross horizontally in the middle of the plurality of vertical reinforcing bars (21) and being constrained to the vertical reinforcing bars or horizontal band reinforcing bars, and the plurality of horizontal reinforcing bars spaced in parallel to each other; The vertical band reinforcing bar 26 is installed while binding the plurality of horizontal reinforcing bars 25; proposes a reinforcing bar assembly 20 assembled as a single assembly. In the reinforcing bar assembly 20, the vertical reinforcing bar 21 and the horizontal band reinforcing bar 22 soon become column reinforcing bars, and the horizontal reinforcing bar 25 and the vertical band reinforcing bar 26 soon become prosthetic or slab reinforcing bars. The reinforcing bar 21 and the horizontal reinforcing bar 25 do not meet with each other, and the portions protruding in the up, down, left, and right directions become settlement lengths. Figure 4 shows an example of the reinforcing bar assembly 20, can be applied to the case where the vertical reinforcing bar 21 and the horizontal band reinforcing bar 22 is circularly arranged as an example CFT column is designed as a circular column.

(c)콘크리트 타설(c) concrete casting

선조립철근으로 철근조립체(20)를 설치하고 나면, 강관기둥(10) 내부와 수평거푸집(F) 위로 콘크리트(30) 타설한다. 이때, 철근조립체(20)의 수평철근(25)이 완전히 매입되면서 철근조립체의 수직철근(21) 상부가 노출되도록 타설한다. 노출된 철근조립체의 수직철근(21) 상부는 그 위로 시공되는 CFT기둥에 정착된다.After installing the reinforcing bar assembly (20) as a pre-assembled reinforcing bar, the concrete (30) is poured over the steel pipe pillar (10) and the horizontal formwork (F). At this time, the horizontal reinforcing bar (25) of the reinforcing bar assembly 20 is completely embedded so that the upper portion of the vertical reinforcing bar 21 of the reinforcing bar is exposed. The upper part of the vertical reinforcing bar 21 of the exposed rebar assembly is fixed to the CFT pillar that is constructed thereon.

(d)강관기둥 설치(d) Steel Pipe Column Installation

하부층의 CFT기둥과 RC수평부재(보 또는 슬래브)를 위한 콘크리트를 타설하고 나면 상부층의 CFT기둥을 구성하는 강관기둥(10)을 설치하는데, 강관기둥(10)은 노출된 철근조립체의 수직철근(21) 상부를 수용하면서 콘크리트(30) 표면 위로 설치한다. 이때의 강관기둥(10)으로는 상기 (a)단계에서 설치된 강관기둥(10)과 마찬가지로 스터드(11)가 더 접합된 강관기둥(10)을 채택할 수 있으며, 다만 스터드(11)가 접합부 보강 목적으로 접합된 만큼 강관기둥(10)의 하부 내측면에 접합되도록 강관기둥(10)을 마련한다. 철근조립체의 수직철근(21) 상부가 노출되기 때문에 강관기둥(10)의 설치위치를 어느 정도 파악할 수 있을 것이나, 노출된 철근조립체의 수직철근(21) 주위의 콘크리트(30) 표면에 강관기둥(10)의 설치위치를 표시하면서 강관기둥(10)을 설치하는 것이 정확한 시공을 위해서 바람직하겠다. After placing concrete for the CFT column and the RC horizontal member (beam or slab) of the lower layer, the steel pipe column 10 constituting the CFT column of the upper layer is installed, and the steel pipe column 10 is a vertical reinforcing bar of the exposed rebar assembly ( 21) Install on the surface of concrete (30) while accommodating the top. At this time, as the steel pipe column 10, as in the steel pipe column 10 installed in the step (a) may be adopted a steel pipe column 10, the stud 11 is further bonded, but the stud 11 reinforces the joint The steel pipe pillar 10 is provided to be bonded to the lower inner surface of the steel pipe pillar 10 as much as the purpose of the bonding. Since the upper part of the vertical reinforcing bar 21 of the reinforcing bar assembly is exposed, the installation position of the steel pipe column 10 may be grasped to some extent, but the steel pipe column may be formed on the surface of the concrete 30 around the vertical reinforcing bar 21 of the exposed reinforcing bar assembly. It is preferable to install the steel pipe column 10 while displaying the installation position of 10) for accurate construction.

상기 (c)단계에서 타설된 콘크리트(30)가 일정 이상 양생되었다면 본 단계에 서는 (a)단계에서 설치된 버팀대(B), 수평거푸집(F) 내지 동바리(S) 제거작업을 수행할 수 있는데, 이렇게 제거된 버팀대(B), 수평거푸집(F)과 동바리(S)는 상부층의 CFT기둥 시공이 진행되는 본 단계에서 재활용할 수 있다. If the concrete (30) poured in the step (c) is cured more than a certain amount in this step can be carried out to remove the brace (B), horizontal form (F) to copper (S) installed in step (a), The braces (B), horizontal formwork (F) and copper bar (S) removed in this way can be recycled in this step of the construction of the CFT pillar of the upper layer.

본 단계에서 설치된 강관기둥(10)에 콘크리트(30)를 타설하면 최종적으로 도 3과 같은 CFT기둥과 RC부재의 접합부가 완성된다.When the concrete 30 is poured into the steel pipe pillar 10 installed in this step, the joint of the CFT pillar and the RC member is finally completed as shown in FIG. 3.

이상에서 본 발명은 기재된 실시예를 참조하여 상세히 설명되었으나, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면 상기에서 설명된 기술적 사상을 벗어나지 않는 범위 내에서 여러가지 치환, 부가 및 변형이 가능할 것임은 당연한 것으로, 이와 같은 변형된 실시 형태들 역시 아래에 첨부한 특허청구범위에 의하여 정하여지는 본 발명의 보호 범위에 속하는 것으로 이해되어야 할 것이다.Although the present invention has been described in detail with reference to the described embodiments, those skilled in the art to which the present invention pertains will be capable of various substitutions, additions and modifications without departing from the technical spirit described above. It is to be understood that such modified embodiments also fall within the protection scope of the present invention as defined by the appended claims below.

도 1은 종래의 CFT기둥과 RC부재의 접합부를 도시한다.1 illustrates a junction of a conventional CFT pillar and an RC member.

도 2는 본 발명에 따른 CFT기둥과 RC부재의 접합부 시공방법을 보여주는 시 공순서도이다.Figure 2 is a flow sequence diagram showing the construction method of the junction portion of the CFT column and RC member according to the present invention.

도 3은 도 2의 시공순서에 따라 완성한 CFT기둥과 RC부재의 접합부를 보여주는 상세단면도이다.Figure 3 is a detailed cross-sectional view showing the junction of the CFT column and the RC member completed in accordance with the construction sequence of FIG.

도 4는 본 발명의 CFT기둥과 RC부재의 접합부 시공에서 이용되는 철근조립체의 일례를 도시한다. Figure 4 shows an example of the reinforcing bar assembly used in the construction of the junction of the CFT column and RC member of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10: 강관기둥 11: 스터드10: steel pipe column 11: stud

20: 철근조립체 21: 수직철근20: Rebar assembly 21: Vertical rebar

22: 수평띠철근 25: 수평철근22: horizontal band rebar 25: horizontal rebar

26: 수직띠철근26: Vertical band rebar

30: 콘크리트30: concrete

B: 버팀대B: brace

F: 수평거푸집F: horizontal formwork

S: 동바리S: Dongbari

Claims (4)

CFT(Concrete Filled steel Tube)기둥과 RC(Reinforced Concrete)보 또는 RC(Reinforced Concrete)슬래브의 접합부를 시공하기 위한 방법으로서,As a method for constructing joints of concrete filled steel tube (CFT) columns and reinforced concrete (RC) beams or reinforced concrete (RC) slabs, (a)강관기둥(10)을 기둥위치에 설치하고, RC보 또는 RC슬래브의 시공을 위한 수평거푸집(F)을 설치하는 단계;(a) installing the steel pipe column 10 in a column position, and installing a horizontal formwork (F) for the construction of RC beams or RC slabs; (b)다수개가 서로 평행하게 이격 배치된 수직철근(21); 상기 다수개의 수직철근을 둘러 감으면서 결속 설치된 수평띠철근(22); 상기 다수개의 수직철근(21) 중간에서 수평으로 가로지르도록 배치되어 상기 수직철근 또는 수평띠철근에 구속 설치되는 한편 다수개가 서로 평행하게 이격 배치된 수평철근(25); 상기 다수개의 수평철근(25)을 둘러 감으면서 결속 설치된 수직띠철근(26);이 하나의 집합체로 조립된 철근조립체(20)를 설치하되, 철근조립체의 수직철근(21) 하부가 강관기둥(10)에 끼워지면서 철근조립체의 수평철근(25)이 수평거푸집(F) 위로 배치되도록 설치하는 단계;(b) a plurality of vertical reinforcing bars 21 are spaced apart in parallel to each other; Horizontal band reinforcing bar 22 is installed while winding the plurality of vertical bars; Horizontal reinforcing bars (25) disposed to cross horizontally in the middle of the plurality of vertical reinforcing bars (21) and being constrained to the vertical reinforcing bars or horizontal band reinforcing bars, and the plurality of horizontal reinforcing bars spaced in parallel to each other; Vertical band reinforcing bar 26 is installed while binding the plurality of horizontal reinforcing bars 25; install the reinforcing bar assembly 20 assembled into a single assembly, the bottom of the vertical reinforcing bar 21 of the reinforcing bar is a steel pipe column ( 10) being installed so that the horizontal reinforcing bar (25) of the reinforcing bar assembly is disposed above the horizontal formwork (F); (c)강관기둥(10) 내부와 수평거푸집(F) 위로 콘크리트(30) 타설하되, 철근조립체의 수평철근(25)이 완전히 매입되면서 철근조립체의 수직철근(21) 상부가 노출되도록 타설하는 단계; 그리고,(c) pouring concrete (30) onto the inside of the steel pipe column (10) and the horizontal formwork (F), while placing the horizontal reinforcing bars 25 of the reinforcing assembly completely so that the upper part of the vertical reinforcing bars 21 of the reinforcing assembly is exposed. ; And, (d)노출된 철근조립체의 수직철근(21) 상부를 수용하면서 콘크리트(30) 표면 위로 강관기둥(10)을 설치하는 단계; (d) installing a steel pipe column 10 over the surface of the concrete 30 while accommodating the upper portion of the vertical rebar 21 of the exposed rebar assembly; 를 포함하여 이루어지는 것을 특징으로 하는 선조립철근을 이용한 CFT기둥과 RC부재의 접합부 시공방법.Construction method of the junction portion of the CFT column and RC member using a pre-assembled reinforcing bar comprising a. 제1항에서,In claim 1, 상기 (d)단계는 (c)단계에서 타설된 콘크리트(30) 표면에 강관기둥(10)의 설치위치를 표시하면서 이루어지는 것을 특징으로 하는 선조립철근을 이용한 CFT기둥과 RC부재의 접합부 시공방법.The step (d) is a method of constructing the joint portion of the CFT column and RC member using a pre-assembled reinforcement, characterized in that the display is made while displaying the installation position of the steel pipe pillar (10) on the surface of the concrete (30) poured in step (c). 제1항에서,In claim 1, 상기 (a)단계는 수평거푸집(F)과 함께 동바리(S)를 설치하면서 이루어지며,The step (a) is made while installing a copper bar (S) with a horizontal formwork (F), 상기 (d)단계는 (a)단계에서 설치된 수평거푸집(F)과 동바리(S)를 제거하면서 이루어지는 것을 특징으로 하는 선조립철근을 이용한 CFT기둥과 RC부재의 접합부 시공방법.Step (d) is a method of constructing a joint portion of the CFT column and RC member using a pre-assembled reinforcing bar, characterized in that while removing the horizontal formwork (F) and copper bar (S) installed in step (a). 제1항 내지 제3항 중 어느 한 항에서,The method according to any one of claims 1 to 3, 상기 (a)단계의 강관기둥(10)은 상부 내측면에 스터드(11)가 접합된 것이며,Steel pipe column 10 of the step (a) is the stud 11 is bonded to the upper inner surface, 상기 (d)단계의 강관기둥(10)은 하부 내측면에 스터드(11)가 접합된 것임을 특징으로 하는 선조립철근을 이용한 CFT기둥과 RC부재의 접합부 시공방법.The steel pipe pillar (10) of the step (d) is a joint construction method of the CFT column and RC member using a pre-assembled reinforcement, characterized in that the stud (11) is bonded to the lower inner surface.
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KR20190097757A (en) 2018-02-13 2019-08-21 유진오 Iron plate bending column structure and method for manufacturing an iron plate bending column structure

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WO2017047834A1 (en) * 2015-09-15 2017-03-23 (주)씨지스플랜 Prefabricated reinforcing bar column
KR102554408B1 (en) * 2021-04-06 2023-07-12 주식회사 연우구조 Connection Structure Between Steel-Concrete Hybrid Columns Using Vetical Member

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