JP3684488B2

JP3684488B2 - Reinforcement method for concrete column / beam joints

Info

Publication number: JP3684488B2
Application number: JP13184696A
Authority: JP
Inventors: 茂芦川; 照男大倉; 敏治才津; 能鷹小宮; 清田中; 聡佐々木; 真一朗米山; 利成今村
Original assignee: Fujita Corp
Current assignee: Fujita Corp
Priority date: 1996-05-27
Filing date: 1996-05-27
Publication date: 2005-08-17
Anticipated expiration: 2016-05-27
Also published as: JPH09316999A

Description

【０００１】
【発明の属する技術分野】
本発明は鉄骨鉄筋コンクリート柱（以下ＳＲＣ柱という）と鉄骨鉄筋コンクリート梁（以下ＳＲＣ梁という）の接合部、ＳＲＣ柱と鉄骨梁（以下Ｓ梁という）との接合部、鉄筋コンクリート柱（以下ＲＣ柱という）と鉄骨梁の接合部の如きコンクリート系柱・梁接合部の配筋工法に係るものである。
【０００２】
【従来の技術】
図３（イ）（ロ）は従来のＳＲＣ柱・ＳＲＣ梁の接合部の一実施例を示し、鉄骨柱梁の接合部の横補強鉄筋はＳ梁の梁ウエブが配筋の障害になるため、Ｌ字形またはコ字形に加工した接合部の横補強鉄筋ａをＳ梁の梁ウエブｂに設けられた貫通孔ｃに貫通し、同各横補強鉄筋ａを溶接接合して柱・梁接合部の配筋を行っている。ｗは接合部横補強鉄筋のフレアー溶接部である。
【０００３】
図中、ｄは柱フランジ、ｅは梁フランジ、ｆは柱主筋、ｇは直交梁フランジ、ｈは梁主筋、ｉは直交梁主筋、ｊは柱横補強筋、ｋは梁横補強筋である。
図４（イ）（ロ）は従来のＳＲＣ柱、ＳＲＣ梁の接合部の他の実施例を示し、同実施例においては柱・梁接合部の閉鎖形の横補強筋を廃止し、柱主筋ｆに沿って折り曲げ加工した差込筋ｍを配置する構成としている。
【０００４】
【発明が解決しようとする課題】
しかしながら図３（イ）（ロ）に示す従来工法においては、Ｌ字形またはコ字形に加工した横補強筋を柱・梁接合部に配筋して夫々を現場溶接するので、Ｓ梁ウエブの穿孔加工、鉄筋の現場溶接が必要であり、施工に手間がかかる。
図４（イ）（ロ）に示す従来工法においても、柱筋に沿って折り曲げ加工した差込筋を１本宛結束するので、十分な施工の省力化は図られず、また前記差込筋の先端がコンクリート打設の際に、所定の位置から移動する可能性がある。
【０００５】
本発明は前記従来技術の有する問題点に鑑みて提案されたもので、その目的とするところは施工性が向上され、コンクリート打設時等において補強筋先端の所定位置からの移動が防止されるコンクリート系柱・梁接合部の配筋工法を提供する点にある。
【０００６】
【課題を解決するための手段】
前記の目的を達成するため、本発明に係るコンクリート系柱・梁接合部の配筋工法は、柱主筋を備えたコンクリート系柱と鉄骨を備えた梁とを接合するコンクリート系柱・梁接合部の配筋工法において、現場での柱・梁接合部の鉄筋組立に先行して、柱・梁接合部の高さ寸法より長い縦方向に延びる補助筋に、中間部が前記柱の柱主筋の列の外側に沿って延在し両端部が前記柱の内方へ向かって延在する形状に折り曲げて形成した複数の横方向の差込筋を、それら差込筋の前記中間部において所定間隔毎に溶接して柱・梁接合部の篭状補強筋を組み立てたのち、現場で、前記差込筋の前記中間部が前記柱の柱主筋の列の外側に沿って延在し前記両端部が前記柱の内方へ向かって延在するように前記篭状補強筋を前記柱の柱主筋に組付けて、前記篭状補強筋における前記補助筋を柱・梁接合部の上下の前記柱の横補強筋に固定するものである。
【０００７】
【発明の実施の形態】
以下、本発明を図面に示す本発明の好ましい実施の形態について説明する。
図１（イ）（ロ）は本発明をＳＲＣ柱・ＳＲＣ梁の接合部に適用した実施例を示す。なおＳＲＣ柱・Ｓ梁の接合部、ＲＣ柱・Ｓ梁の接合部の実施例は基本的にはＳＲＣ柱・ＳＲＣ梁接合部の場合と実質的に同一であるからここでは説明を省略する。
【０００８】
図２（イ）（ロ）に示すように縦方向に延びる補助筋１に複数の横方向の差込筋２を、同補助筋１の長手方向に亘って所要間隔毎に配設して溶接し、柱・梁接合部の篭状補強筋を組み立てる。
図１（ロ）から明らかなように、補助筋１は、柱・梁接合部の高さ寸法より長い。
図１（イ）から明らかなように、差込筋２は、中間部がＳＲＣ柱の柱主筋５の列の外側に沿って延在し両端部がＳＲＣ柱の内方へ向かって延在する形状に折り曲げて形成している。
図２（イ）及び（ロ）から明らかなように、複数の差込筋２は、それらの中間部において補助筋１に溶接されている。
なお本発明の工法が適用される柱鉄骨３及び梁鉄骨４は工場で製作される。その際梁ウエブの補強筋用の穿孔は不要である。
【０００９】
現場では下柱の柱主筋５、梁主筋６及び柱横補強筋７、梁横補強筋８を配設し、しかる後、前記のように篭状に溶接組み立てられた柱・梁接合部補強筋を配筋し、柱・梁接合部の差込筋２を配筋する。これによって、図１（イ）に示したように、差込筋２の中間部がＳＲＣ柱の柱主筋の列の外側に沿って延在し両端部がＳＲＣ柱の内方へ向かって延在するようになる。
図中、９は柱フランジ、１０は梁フランジ、１１は直交梁主筋、１２は直交梁フランジである。
【００１０】
而して前記柱・梁接合部補強筋はコンクリート打設の際に差込筋２の先端が所定の位置から移動することを防ぐために、柱・梁接合部の上下のＳＲＣ柱の柱横補強筋７に補助筋１を結束して固定するものである。
【００１１】
【発明の効果】
本発明によれば前記したように、縦方向に延びる補助筋に複数の横方向の差込筋を所定間隔毎に溶接することによって、柱・梁接合部の篭状補強筋を現場での柱・梁接合部の鉄筋組立に先行して組み立て、現場で柱・梁接合部の鉄筋組立時において前記篭状補強筋における縦方向に延びる前記補助筋を上下柱の補助鉄筋に固定したので、差込筋よりなる横方向の補強筋の柱・梁接合部に対する取付けが、鉄骨梁のウエブの穿孔加工、及び鉄筋の現場溶接を伴うことなく、作業性が向上され、配筋作業が簡単迅速に行なわれる。
【００１２】
また前記差込筋は従来のように現場で１本づつ結束するのではなく、現場の鉄筋の組立に先行して縦方向に延びる補助筋に所定間隔毎に溶接して柱・梁接合部の篭状補強筋を組み立てたのち、差込筋を１本づつ柱・梁接合部の鉄筋に結束する従来工法に比して省力化が図られるものである。また従来工法では柱・梁接合部において柱主筋に１本宛結束した差込筋の先端が、コンクリート打設時に所定の位置から移動する可能性があるが、本発明によれば前記篭状補強筋における横方向の差込筋が所定間隔毎に溶接された縦方向に延びる補助筋が上下柱の横補強筋に固定されることによって、コンクリート打設の際に差込筋の先端が所定の位置から移動することがない。
【図面の簡単な説明】
【図１】（イ）（ロ）は本発明の方法が適用されたＳＲＣ柱・梁の接合部の一実施例を示す平断面図及び縦断面図である。
【図２】（イ）（ロ）は柱・梁接合部の篭状補強筋の斜視図である。
【図３】（イ）（ロ）は従来工法によるＳＲＣ柱・梁の接合部の一実施例を示す平断面図及び縦断面図である。
【図４】（イ）（ロ）は従来工法によるＳＲＣ柱・梁の接合部の他の実施例を示す平断面図及び縦断面図である。
【符号の説明】
１補助筋
２差込筋
３柱鉄骨
４梁鉄骨
５柱主筋
６梁主筋
７柱横補強筋
８梁横補強筋
９柱フランジ
１０梁フランジ
１１直交梁主筋
１２直交梁フランジ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint between a steel reinforced concrete column (hereinafter referred to as an SRC column) and a steel reinforced concrete beam (hereinafter referred to as an SRC beam), a joint between an SRC column and a steel beam (hereinafter referred to as an S beam), a reinforced concrete column (hereinafter referred to as an RC column). It relates to the reinforcement method of concrete column / beam joints such as joints between steel and steel beams.
[0002]
[Prior art]
3 (a) and 3 (b) show an embodiment of a conventional SRC column / SRC beam joint, because the beam reinforcement of the S beam is an obstacle to the reinforcement of the lateral reinforcement reinforcement at the steel column beam joint. Column-beam joints are formed by penetrating the transverse reinforcing bars a of the joints processed into L-shapes or U-shapes into the through holes c provided in the beam web b of the S beam, and welding the respective transverse reinforcement bars a. Is doing bar arrangements. w is the flare welding part of a joint part reinforcement reinforcement.
[0003]
In the figure, d is a column flange, e is a beam flange, f is a column reinforcement, g is an orthogonal beam flange, h is a beam reinforcement, i is an orthogonal beam reinforcement, j is a column transverse reinforcement, and k is a beam transverse reinforcement. .
4 (a) and 4 (b) show another embodiment of a conventional SRC column and SRC beam joint. In this embodiment, the column-beam joint is closed and the column reinforcement is abolished. It is set as the structure which arrange | positions the insertion bar m bent along f.
[0004]
[Problems to be solved by the invention]
However, in the conventional method shown in FIG. 3 (a) (ii), since the lateral reinforcement processed into L-shape or U-shape with Haisuji the columns and beams joints for field welding respectively, perforation of S beam web Processing and on-site welding of the reinforcing bars are necessary, and construction takes time.
Also in the conventional method shown in FIGS. 4 (a) and 4 (b), since one insertion bar that is bent along the column reinforcement is bound to one, sufficient labor-saving cannot be achieved, and the insertion reinforcement When the concrete tip is placed in concrete, there is a possibility of moving from a predetermined position.
[0005]
The present invention has been proposed in view of the above-mentioned problems of the prior art. The object of the present invention is to improve the workability and prevent the reinforcing bar tip from moving from a predetermined position when placing concrete. The point is to provide a reinforcement method for concrete column / beam joints.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the concrete-based column / beam joint arrangement method according to the present invention is a concrete-type column / beam joint that joins a concrete-type column having a column main reinforcement and a beam having a steel frame. In the bar arrangement method of the column, prior to the rebar assembling of the column / beam joint at the site, the middle part of the column main reinforcement of the column is an auxiliary bar extending in the longitudinal direction longer than the height dimension of the column / beam joint . A plurality of lateral insertion bars formed by bending in a shape extending along the outside of the row and having both ends extending inward of the column , a predetermined interval at the intermediate portion of the insertion bars After assembling the bar-shaped reinforcement of the column / beam joint by welding each time, the intermediate portion of the insertion bar extends along the outside of the column main bar column of the column at the site, and the both end portions Assembling the hook-shaped reinforcing bars to the column main bars of the column so that the It said auxiliary muscle in cage-like reinforcement is intended to fix the transverse reinforcement of the pillars of the upper and lower columns and beams joints.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described with reference to the preferred embodiments shown in the drawings.
1 (a) and 1 (b) show an embodiment in which the present invention is applied to an SRC column / SRC beam joint. The embodiments of the SRC column / S beam joint and the RC column / S beam joint are basically the same as those in the case of the SRC column / SRC joint, and the description thereof is omitted here.
[0008]
As shown in FIGS. 2 (a) and 2 (b), a plurality of lateral insertion bars 2 are arranged in the longitudinal direction of the auxiliary reinforcement 1 extending in the vertical direction at every required interval and welded. And assemble the bar-shaped reinforcement of the column-beam joint.
As is apparent from FIG. 1 (b), the auxiliary bar 1 is longer than the height dimension of the column / beam joint.
As is clear from FIG. 1 (a), the insertion bar 2 has an intermediate portion extending along the outside of the column main bar 5 of the SRC column and both ends extending inward of the SRC column. It is formed by bending it into a shape.
As is clear from FIGS. 2 (a) and 2 (b), the plurality of insertion bars 2 are welded to the auxiliary bars 1 at their intermediate portions.
The column steel frame 3 and the beam steel frame 4 to which the method of the present invention is applied are manufactured at a factory. In that case, there is no need to drill a reinforcing bar for the beam web.
[0009]
At the site, the column main reinforcement 5 of the lower column, the beam main reinforcement 6, the column horizontal reinforcement 7 and the beam horizontal reinforcement 8 are arranged, and then the column / beam joint reinforcement which is welded and assembled in a bowl shape as described above. , And insert the insertion bar 2 at the column / beam joint. As a result, as shown in FIG. 1 (a), the intermediate portion of the insertion bar 2 extends along the outside of the column main bar of the SRC column, and both end portions extend inward of the SRC column. To come.
In the figure, 9 is a column flange, 10 is a beam flange, 11 is an orthogonal beam main reinforcement, and 12 is an orthogonal beam flange.
[0010]
Thus, in order to prevent the end of the insertion bar 2 from moving from a predetermined position when the concrete is placed, the column / beam joint reinforcement is laterally reinforced with the SRC columns above and below the column / beam joint. The auxiliary muscle 1 is bound and fixed to the muscle 7.
[0011]
【The invention's effect】
According to the present invention, as described above, a plurality of lateral insertion bars are welded to the auxiliary bars extending in the vertical direction at predetermined intervals, so that the bar-shaped reinforcing bars of the column / beam joint are connected to the column in the field.・ Assembled prior to rebar assembly of beam joints, the auxiliary bars extending in the vertical direction of the bar-shaped reinforcing bars were fixed to the auxiliary rebars of the upper and lower columns when assembling the bars and beam joints on site. Installation of lateral reinforcement bars consisting of reinforcing bars to the column / beam joints improves workability without the need for drilling of steel beam webs and on-site welding of the reinforcing bars, facilitating the reinforcement work. Done.
[0012]
In addition, the insertion bars are not bundled one by one in the field as in the prior art, but are welded at predetermined intervals to auxiliary bars extending in the vertical direction prior to assembly of the on-site reinforcing bars. After assembling the hook-shaped reinforcing bars, labor can be saved compared to the conventional method of binding the insertion bars one by one to the reinforcing bars in the column / beam joint. In addition, in the conventional method, the tip of the insertion bar bound to one of the column main bars at the column / beam joint may move from a predetermined position during concrete placement. The longitudinally extending auxiliary bar welded at predetermined intervals to the horizontal insertion bar in the bar is fixed to the horizontal reinforcement bar of the upper and lower columns, so that the tip of the insertion bar is set to a predetermined level when placing concrete. Does not move from position.
[Brief description of the drawings]
FIGS. 1A and 1B are a plan sectional view and a longitudinal sectional view showing an embodiment of an SRC column / beam joint to which a method of the present invention is applied.
FIGS. 2A and 2B are perspective views of a bar-shaped reinforcing bar at a column / beam joint.
FIGS. 3A and 3B are a plan sectional view and a longitudinal sectional view showing an example of an SRC column / beam joint by a conventional method.
FIGS. 4A and 4B are a plan sectional view and a longitudinal sectional view showing another embodiment of an SRC column / beam joint by a conventional method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Auxiliary reinforcement 2 Insertion reinforcement 3 Column steel frame 4 Beam steel frame 5 Column main reinforcement 6 Beam main reinforcement 7 Column transverse reinforcement 8 Beam transverse reinforcement 9 Column flange 10 Beam flange 11 Orthogonal beam reinforcement 12 Orthogonal beam flange

Claims

In the bar arrangement method for concrete columns and beam joints that joins concrete columns with column main bars and beams with steel frames,
Prior to on-site column / beam joint rebar assembly , the middle part extends along the outside of the column main reinforcement column of the column, along the longitudinally extending auxiliary bars longer than the column / beam joint height dimension. A plurality of lateral insertion bars formed by extending and bending into both ends extending inward of the column are welded at predetermined intervals at the intermediate portion of the insertion bars. -After assembling the bar- shaped reinforcing bars of the beam joint, at the site, the intermediate part of the insertion bar extends along the outside of the column main bar of the column, and the both ends are inward of the column. Assemble the saddle-shaped reinforcing bar to the column main bar of the column so as to extend toward the side, and fix the auxiliary bar in the bar- shaped reinforcing bar to the horizontal reinforcing bar of the column above and below the column-beam joint Reinforcement method for concrete columns and beam joints, characterized by