JP2019082098A

JP2019082098A - Reinforcement structure of reinforced concrete structure

Info

Publication number: JP2019082098A
Application number: JP2018018266A
Authority: JP
Inventors: 神島　昭男; Akio Kamishima; 昭男神島; 充子神島; Mitsuko Kamishima
Original assignee: Kamishimagumi KK
Current assignee: Kamishimagumi KK
Priority date: 2018-02-05
Filing date: 2018-02-05
Publication date: 2019-05-30

Abstract

To provide a reinforcement structure that makes it possible to construct a reinforced concrete structure having excellent seismic performance.SOLUTION: The structure comprises main bars arranged to form an axially extending M-shaped prismatic space while forming an M square within an imaginary plane in which M (M≥3) first main bars axially extended are orthogonal to the axial direction, a plurality of first shear reinforcement bars arranged to face from the outside of the space an adjacent region sandwiched by mutually adjacent first main bars, and connect the adjacent first main bars, a plurality of second main bars axially extending in the adjacent area and attached to the first shear reinforcement bar, and a plurality of second shear reinforcement bars arranged adjacent to the outer sides of the plurality of first shear reinforcement bars and connecting adjacent first main bars. One of the first shear reinforcement bar and the second shear reinforcement bar is a strip extending in an orthogonal direction orthogonal to the axial direction, and the other is a cross-extending bracing diagonally intersecting the orthogonal direction and the axial direction.SELECTED DRAWING: Figure 1

Description

この発明は、建築や土木工事などで多用されている鉄筋コンクリート構造物の配筋構造に関するものである。 The present invention relates to a reinforcement structure of a reinforced concrete structure frequently used in construction and civil engineering work.

鉄筋コンクリート造の柱や梁では、例えば特許文献１に記載されているように、軸方向に延設された複数の主筋が配筋されている。そして、それらの主筋の外側を覆うように軸方向と直交する向きに帯筋やあばら筋などのせん断補強筋が配筋されている。さらに、せん断補強筋の内側に中間せん断補強筋が配筋されている。 In a reinforced concrete column or beam, for example, as described in Patent Document 1, a plurality of main bars extending in the axial direction are arranged. Then, shear reinforcement bars such as a striation and a rib are arranged in a direction perpendicular to the axial direction so as to cover the outside of the main bars. Furthermore, an intermediate shear reinforcement is arranged inside the shear reinforcement.

特開２００９−１４４３４４号公報JP, 2009-144344, A

従来の鉄筋コンクリート構造物では、せん断補強筋は主筋に対してフープ状、あるいは螺旋状に配置されている。そして、端部が折り曲げられ、端部同士を係合させることで固定している。このような固定方式を採用している鉄筋コンクリート構造物に大きな地震荷重が作用すると、主筋の座屈を効果的に抑制することは難しい。そこで、より耐震強度に優れた鉄筋コンクリート構造物を得るのに好適な配筋構造の提供が望まれている。 In the conventional reinforced concrete structure, the shear reinforcing bars are arranged in a hoop or spiral shape with respect to the main bars. Then, the end portions are bent and fixed by engaging the end portions. When a large seismic load acts on a reinforced concrete structure adopting such a fixing method, it is difficult to effectively suppress the buckling of the main bars. Therefore, it is desirable to provide a bar arrangement structure suitable for obtaining a reinforced concrete structure having higher seismic resistance.

この発明は、上記課題に鑑みなされたものであり、優れた耐震性能を有する鉄筋コンクリート構造物を構築することを可能とする配筋構造を提供することを目的とする。 This invention is made in view of the said subject, and it aims at providing the bar arrangement structure which makes it possible to build the reinforced concrete structure which has the outstanding seismic performance.

この発明の一態様は、鉄筋コンクリート構造物の配筋構造であって、軸方向に延設された第１主筋がＭ本（Ｍ≧３）、軸方向と直交する仮想面内でＭ角形を形成するとともに軸方向に伸びるＭ角柱状の空間を形成するように、配置された主筋体と、互いに隣り合う第１主筋に挟まれた隣接領域を空間の外側から臨むように配置されて隣り合う第１主筋同士を連結する複数の第１せん断補強筋と、隣接領域内で軸方向に延設されるとともに第１せん断補強筋に取り付けられる複数の第２主筋と複数の第１せん断補強筋の外側に隣接して配置されて隣り合う第１主筋同士を連結する複数の第２せん断補強筋とを備え、第１せん断補強筋および第２せん断補強筋のうちの一方は軸方向に対して直交する直交方向に延設される帯筋であり、他方は直交方向および軸方向に対して斜めに交差する交差方向に延設される筋交いであることを特徴としている。 One aspect of the present invention is a reinforcement structure of a reinforced concrete structure, wherein M axially extending first main bars (M ≧ 3) form an M square in a virtual plane orthogonal to the axial direction And an adjacent region between the main bars disposed adjacent to each other and the first main bars disposed adjacent to each other so as to form an axially-extending M-square columnar space 1) A plurality of first shear reinforcements connecting main reinforcements, and an outer side of a plurality of second reinforcements and a plurality of first shear reinforcements extending axially in the adjacent region and attached to the first shear reinforcement And a plurality of second shear reinforcement bars disposed adjacent to each other to connect adjacent first main bars, one of the first shear reinforcement bars and the second shear reinforcement bars being orthogonal to the axial direction The strips extend in the orthogonal direction, and the other is orthogonal It is characterized by a brace which extends in the direction crossing obliquely with respect to direction and axial direction.

以上のように構成された本発明では、主筋として、第１主筋と第２主筋とが配筋される。第１主筋は軸方向と直交する仮想面内でＭ角形を形成するとともに軸方向に伸びるＭ角柱状の空間を形成するように配置されている。そして、互いに隣り合う第１主筋に対して２種類のせん断補強筋（＝帯筋＋筋交い）が連結されている。このため、第１主筋の座屈を効果的に抑制することができる。 In the present invention configured as described above, the first main muscle and the second main muscle are arranged as main muscles. The first main reinforcement forms an M-shaped square in a virtual plane orthogonal to the axial direction and is arranged to form an axially extending M-shaped prismatic space. Then, two types of shear reinforcing bars (= stripes + crossings) are connected to the first main bars adjacent to each other. For this reason, the buckling of the first main bar can be effectively suppressed.

また、第２主筋は隣接領域内で軸方向に延設されるとともに第１せん断補強筋に取り付けられている。したがって、第２主筋の座屈に対し、第１主筋と一体化されて高い剛性を有しているせん断補強筋が大きな抵抗となり、第２主筋の座屈を効果的に抑制することができる。 In addition, the second main reinforcement extends axially in the adjacent region and is attached to the first shear reinforcement. Therefore, the shear reinforcement bars integrated with the first main bars and having high rigidity provide great resistance to the buckling of the second main bars, and the buckling of the second main bars can be effectively suppressed.

さらに、上記のように２種類のせん断補強筋を第１主筋に連結する態様としては、第１せん断補強筋および第２せん断補強筋のうちの一方が隣接領域を空間の内側から臨むように配置されるとともに他方が空間の外側から臨むように配置されるように構成してもよい。しかしながら、この場合、一方のせん断補強筋（内側せん断補強筋）を主筋体の内側から施工する必要がある。これに対し、本発明では、いずれのせん断補強筋についても、主筋体の外側より施工することができる。このため、優れた耐震性能を有する鉄筋コンクリート構造物を高い施工性で構築することができる。 Furthermore, as an aspect which connects two types of shear reinforcement bars to the first main bar as described above, one of the first shear reinforcement bars and the second shear reinforcement bars is arranged such that the adjacent region is viewed from the inside of the space And the other may be arranged to be exposed from the outside of the space. However, in this case, it is necessary to apply one shear reinforcement bar (inner shear reinforcement bar) from the inside of the main bar. On the other hand, in the present invention, any shear reinforcing bars can be applied from the outside of the main bars. For this reason, it is possible to construct a reinforced concrete structure having excellent seismic performance with high workability.

本発明に係る鉄筋コンクリート構造物の配筋構造の第１実施形態を示す図である。It is a figure which shows 1st Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. 図１の（ｃ）欄に示す工程の実行後における配筋構造の平面図である。It is a top view of the bar arrangement structure after execution of the process shown in the (c) column of FIG. 図１の（ｃ）欄に示す工程の実行後における配筋構造の側面図である。It is a side view of the bar arrangement structure after execution of the process shown in the (c) column of FIG. 本発明に係る鉄筋コンクリート構造物の配筋構造の第２実施形態を示す図である。It is a figure which shows 2nd Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention. 本発明に係る鉄筋コンクリート構造物の配筋構造の第３実施形態を示す図である。It is a figure which shows 3rd Embodiment of the reinforcement structure of the reinforced concrete structure which concerns on this invention.

図１は本発明に係る鉄筋コンクリート構造物の配筋構造の第１実施形態を示す図であり、矩形断面を有する柱状の鉄筋コンクリート構造物を構築するのに用いる配筋構造の組立途中の状態を示している。配筋構造１は、図１に示すように、ベース鋼板２と、鉛直方向Ｚを軸方向とし、当該軸方向Ｚに延設された４本の山形鋼３Ａ〜３Ｄと、複数の帯筋４と、軸方向Ｚに延設された複数の鉄筋５と、複数の筋交い７とを備えている。 FIG. 1 is a view showing a first embodiment of a reinforcement structure of a reinforced concrete structure according to the present invention, showing a state in the middle of assembling of the reinforcement structure used for constructing a columnar reinforced concrete structure having a rectangular cross section. ing. As shown in FIG. 1, the reinforcement structure 1 has a base steel plate 2, four vertical angle steels 3A to 3D extending in the axial direction Z with the vertical direction Z as an axial direction, and a plurality of reinforcement bars 4 , A plurality of reinforcing bars 5 extended in the axial direction Z, and a plurality of bracings 7.

ベース鋼板２は鉄筋コンクリート構造物の施工場所に設置され、図示省略するアンカーボルトなどに装着されて固定される。このベース鋼板２の上面には、同仮想面（図１中のＸＹ平面）内において４角形（矩形）を形成するように４つの固定部材２１が鉛直方向Ｚに突設されている。各固定部材２１は上方からの平面視で「く」字形状を有しており、谷折部位同士が相互に対向するように配置されている。 The base steel plate 2 is installed at a construction site of a reinforced concrete structure, and is mounted and fixed to an anchor bolt or the like (not shown). Four fixing members 21 project in the vertical direction Z on the upper surface of the base steel plate 2 so as to form a quadrilateral (rectangle) in the same imaginary plane (XY plane in FIG. 1). Each fixing member 21 has a “く” shape in a plan view from above, and is disposed such that valley-folded portions face each other.

山形鋼３Ａ〜３Ｄの各々は本発明の「第１主筋」の一例に相当するものであり、２枚の鋼片を軸方向Ｚと直交する仮想面内で直交して結合したものであり、例えば１枚の鋼板を９０゜に折り曲げたものを使用することができる。山形鋼３Ａ〜３Ｄは、図１に示すように、稜線部位（鋼片同士を連結した部位）を外方に向け、しかも谷折部位を固定部材２１の山折部位に係合させた状態でベース鋼板２上に配置され、図示を省略するボルトなどの締結部材や溶接などによって固定される。こうして、山形鋼３Ａ〜３Ｄはベース鋼板２上に立設されて軸方向Ｚに伸びる四角柱状の空間ＳＰを形成する。これら４本の山形鋼３Ａ〜３Ｄを区別して説明するため、本明細書では山形鋼３Ａ〜３Ｄをそれぞれ「第１山形鋼」、「第２山形鋼」、「第３山形鋼」および「第４山形鋼」と称する。 Each of the angle steels 3A to 3D corresponds to an example of the "first main bar" of the present invention, and is obtained by connecting two steel pieces orthogonally in an imaginary plane orthogonal to the axial direction Z, For example, a steel plate bent at 90 ° can be used. As shown in FIG. 1, the angle steels 3A to 3D have the ridge line portions (portions connecting steel pieces) directed outward, and the base with the valley folding portions engaged with the mountain folding portions of the fixing member 21. It is disposed on the steel plate 2 and fixed by a fastening member such as a bolt (not shown) or welding. Thus, the angle steels 3A to 3D are erected on the base steel plate 2 to form a square columnar space SP extending in the axial direction Z. In order to distinguish and explain these four angle steels 3A to 3D, in this specification, the angle steels 3A to 3D are respectively referred to as "first angle steel", "second angle steel", "third angle steel" and "third angle steel". It is called "4 angle steel".

図２は図１の（ｃ）欄に示す工程の実行後における配筋構造の平面図であり、図３は図１の（ｃ）欄に示す工程の実行後における配筋構造の側面図である。帯筋４は、帯状の鋼板で構成されており、第１山形鋼３Ａおよび第２山形鋼３Ｂで挟まれた隣接領域ＡＲ、第２山形鋼３Ｂおよび第３山形鋼３Ｃで挟まれた隣接領域ＡＲ、第３山形鋼３Ｃおよび第４山形鋼３Ｄで挟まれた隣接領域ＡＲならびに第４山形鋼３Ｄおよび第１山形鋼３Ａで挟まれた隣接領域ＡＲの各々で、隣接領域ＡＲを上記空間ＳＰの外側から臨むように、複数本、略等間隔で配置されており、本発明の「第１せん断補強筋」の一例に相当している。 FIG. 2 is a plan view of the rebar structure after execution of the process shown in column (c) of FIG. 1, and FIG. 3 is a side view of the rebar structure after execution of the process shown in column (c) of FIG. is there. The strip 4 is made of a strip-shaped steel plate, and the adjacent area AR sandwiched between the first angle steel 3A and the second angle steel 3B, and the adjacent area interposed between the second angle steel 3B and the third angle steel 3C. In each of the adjacent area AR sandwiched between AR, third angle steel 3C and fourth angle steel 3D, and the adjacent area AR interposed between fourth angle steel 3D and first angle steel 3A, the adjacent area AR is the space SP A plurality of pieces are arranged at substantially equal intervals so as to face from the outside of the above, and corresponds to an example of the "first shear reinforcement bar" of the present invention.

第１山形鋼３Ａおよび第２山形鋼３Ｂで挟まれた隣接領域ＡＲに面する帯筋４は、図２および図３に示すように、その長さが隣り合う山形鋼３Ａ、３Ｂの稜線部位間の間隔とほぼ同じあるいは若干短く、軸方向Ｚに対して直交する直交方向に延設された状態で両端部が山形鋼３Ａ、３Ｂと当接した状態で、ボルトなどの締結部材８によって山形鋼３Ａ、３Ｂと連結される。こうして、第１山形鋼３Ａ、第２山形鋼３Ｂおよび帯筋４が一体化される。また、他の隣り合う山形鋼についても、上記と同様にして一体化される。その結果、図１の（ｂ）欄に示すように、隣り合う山形鋼３、３が帯筋４によって一体化され、地震荷重により山形鋼３Ａ〜３Ｄが座屈するのを効果的に抑制することができる。なお、本明細書では、このように４つの山形鋼３Ａ〜３Ｄにより構成される構造体を「主筋体６」と称する。 As shown in FIGS. 2 and 3, the ridge 4 facing the adjacent area AR sandwiched by the first angle steel 3A and the second angle steel 3B is a ridge line portion of the angle steels 3A and 3B whose lengths are adjacent to each other. With a gap between the two members in the state in which both ends are in contact with the angle steels 3A and 3B in a state in which they are extended in an orthogonal direction orthogonal to the axial direction Z. It is connected with steel 3A, 3B. Thus, the first angle steel 3A, the second angle steel 3B and the strip 4 are integrated. Further, other adjacent angle steels are also integrated in the same manner as described above. As a result, as shown in the column (b) of FIG. 1, adjacent angle steels 3 and 3 are integrated by the rebar 4 to effectively suppress buckling of the angle steels 3A to 3D due to seismic load. Can. In addition, in this specification, the structure comprised in this way by four angle steels 3A-3D is called "the main reinforcement 6".

また、各隣接領域ＡＲは互いに隣り合う山形鋼３、３および帯筋４により囲まれており、複数の鉄筋５の配設領域として機能する。隣接領域ＡＲでは、複数の鉄筋５が軸方向Ｚに延設され、本発明の「第２主筋」の一例に相当している。すなわち、図１の（ｃ）欄、図２や図３に示すように、複数の鉄筋５が帯筋４の中央部に対して空間ＳＰの内側に挿入され、帯筋４に取り付けられている。 Moreover, each adjacent area | region AR is surrounded by the angle steel 3, 3 and the strip 4 which adjoin mutually, and functions as an arrangement | positioning area | region of several reinforcing bars 5. In the adjacent area AR, a plurality of reinforcing bars 5 are extended in the axial direction Z, which corresponds to an example of the “second main bar” in the present invention. That is, as shown in column (c) of FIG. 1 and FIGS. 2 and 3, a plurality of reinforcing bars 5 are inserted inside the space SP with respect to the central portion of the strip 4 and attached to the strip 4 .

さらに、各帯筋４の外側に筋交い７が配置され、山形鋼３Ａ〜３Ｄに連結されている。各筋交い７は、例えば図３に示すように上記直交方向Ｙおよび軸方向Ｚに対して斜めに交差する交差方向（本実施形態では、斜め４５゜の方向）に延設された帯鋼で構成されており、第１山形鋼３Ａおよび第２山形鋼３Ｂで挟まれた隣接領域ＡＲに対向配置された帯筋４を介して対向するように配置されている。そして、筋交い７の両端部がボルトなどの締結部材８によって連結されている。なお、本実施形態では図３に示すように、筋交い７の端部は空間ＳＰから外側に向かう方向において帯筋４の端部と重なり合うように重畳され、その端部重畳部位９１に対して締結部材８が装着され、第１山形鋼３Ａ、第２山形鋼３Ｂ、帯筋４および筋交い７を一体的に連結している。当該締結部材８は第１山形鋼３Ａおよび第２山形鋼３Ｂに対して帯筋４および筋交い７を連結する共通締結部材として機能しており、本明細書では帯筋４のみを締結する締結部材と区別するために適宜「共通締結部材８Ａ」と称する。このように共通締結部材８Ａを用いることで締結部材の使用個数を抑制することができ、コストおよび施工工数を削減することができる。また、他の隣り合う山形鋼についても、上記と同様にして一体化される。その結果、帯筋４および筋交い７はせん断補強筋として機能するだけでなく、上記したように山形鋼３Ａ〜３Ｄと一体化されて高い剛性を発揮し、鉄筋５が座屈する際に大きな抵抗として作用する。このため、鉄筋５の座屈をさらに効果的に抑制することができる。このように、本実施形態では、筋交い７が本発明の「第２せん断補強筋」の一例に相当している。 Furthermore, braces 7 are disposed on the outer side of each strip 4 and connected to the angle steels 3A to 3D. Each of the braces 7 is, for example, a steel strip extending in a crossing direction (in the present embodiment, a direction of 45 ° in the present embodiment) obliquely crossing the orthogonal direction Y and the axial direction Z as shown in FIG. It is disposed so as to face the adjacent area AR sandwiched between the first angle steel 3A and the second angle steel 3B via the reinforcing bars 4 arranged opposite to each other. And both ends of brace 7 are connected by fastening members 8 such as bolts. In the present embodiment, as shown in FIG. 3, the end of the brace 7 is overlapped so as to overlap the end of the strip 4 in the direction from the space SP to the outside, and is fastened to the end overlapping portion 91 thereof. A member 8 is mounted to integrally connect the first angle steel 3A, the second angle steel 3B, the strip 4 and the brace 7. The fastening member 8 functions as a common fastening member for connecting the strip 4 and the brace 7 to the first angle steel 3A and the second angle steel 3B, and in the present specification, a fastening member for fastening only the line 4 In order to distinguish it, it calls "the common fastening member 8A" suitably. By using the common fastening member 8A as described above, the number of fastening members used can be suppressed, and the cost and the number of construction steps can be reduced. Further, other adjacent angle steels are also integrated in the same manner as described above. As a result, the reinforcement bars 4 and the braces 7 not only function as shear reinforcement bars, but also are integrated with the angle steels 3A to 3D as described above to exhibit high rigidity, and as a large resistance when the reinforcing bars 5 are buckled Works. For this reason, the buckling of the reinforcing bars 5 can be suppressed more effectively. Thus, in the present embodiment, the brace 7 corresponds to an example of the “second shear reinforcement bar” of the present invention.

以上のように、本実施形態では、主筋として、山形鋼３Ａ〜３Ｄ（第１主筋）と鉄筋５（第２主筋）とが配筋される。そして、互いに隣り合う山形鋼３Ａ〜３Ｄに対して２種類のせん断補強筋（＝帯筋４＋筋交い７）が連結されているため、山形鋼３Ａ〜３Ｄの座屈を効果的に抑制することができる。鉄筋５に対して帯筋４が取り付けられているため、鉄筋５の座屈に対し、山形鋼３Ａ〜３Ｄと一体化されて高い剛性を有している帯筋４が大きな抵抗となり、鉄筋５の座屈を効果的に抑制することができる。 As described above, in the present embodiment, as main bars, angle steels 3A to 3D (first main bars) and reinforcing bars 5 (second main bars) are arranged. And, since two types of shear reinforcement bars (= strip 4 + brac 7) are connected to adjacent angle steels 3A to 3D, it is possible to effectively suppress the buckling of angle steels 3A to 3D. it can. Since the reinforcing bars 4 are attached to the reinforcing bars 5, the reinforcing bars 5 which are integrated with the angle steels 3A to 3D and have high rigidity against the buckling of the reinforcing bars 5 provide a large resistance. Can be effectively suppressed.

また、上記実施形態では、主筋群（＝山形鋼３Ａ〜３Ｄおよび鉄筋５）に対して２種類のせん断補強筋、つまり帯筋４および筋交い７が山形鋼３Ａ〜３Ｄよりも外側に隣接して配置されているために主筋体６から外側にせん断補強筋がはみ出る。しかしながら、帯筋４および筋交い７はいずれも帯鋼で構成されているため、そのはみ出し量は帯鋼の厚み２枚分程度に抑えられ、軸方向Ｚと直交する方向への配筋構造１の大型化を抑制することができる。しかも、次の理由から高い施工性が得られる。 Further, in the above embodiment, two types of shear reinforcement bars, namely, the reinforcement bars 4 and the braces 7 are adjacent to the outer side than the angle bars 3A to 3D with respect to the main bars (= angle bars 3A to 3D and reinforcing bars 5). Because of the arrangement, shear reinforcement bars protrude outward from the main muscle 6. However, since the reinforcing bars 4 and the bracing bars 7 are both made of band steel, the amount of protrusion is suppressed to about the thickness of two steel bars, and the bar arrangement 1 in the direction orthogonal to the axial direction Z An increase in size can be suppressed. Moreover, high workability can be obtained for the following reasons.

主筋体６へのせん断補助筋の取付態様として、軸方向Ｚと直交する方向から主筋群を帯筋４および筋交い７で挟み込むという態様を採用する場合には、空間ＳＰ側から筋交い７を山形鋼３Ａ〜３Ｄに連結する必要となり、当該連結作業を行うことができる配筋構造１が限定されてしまう。これに対し、本実施形態では、帯筋４および筋交い７のいずれも主筋群の外側から山形鋼３Ａ〜３Ｄに連結させているため、連結作業を容易に行うことができ、高い施工性が得られる。しかも、筋交い７を外側に配置することで、筋交い７を空間ＳＰ内に配置した場合よりも耐震性能が高まるという作用効果も得られる。 In the case of adopting a mode in which the main muscle group is sandwiched between the strip 4 and the brace 7 from the direction orthogonal to the axial direction Z as the attachment mode of the shear assisting muscle to the main muscle 6, the bracing 7 from the space SP side It becomes necessary to connect to 3A-3D, and the reinforcement structure 1 which can perform the said connection operation will be limited. On the other hand, in the present embodiment, since both the strip 4 and the brace 7 are connected to the angle steels 3A to 3D from the outside of the main muscle group, the connecting operation can be easily performed, and high workability is obtained. Be In addition, by disposing the bracing 7 on the outer side, there is obtained an effect that the seismic performance is enhanced as compared to the case where the bracing 7 is disposed in the space SP.

さらに、本実施形態では、上記したように共通締結部材８Ａを用いることで締結部材の使用個数を抑制して製造コストおよび施工工数を削減することができる。 Furthermore, in the present embodiment, by using the common fastening member 8A as described above, the number of fastening members used can be suppressed, and the manufacturing cost and the number of construction steps can be reduced.

ところで、上記実施形態では端部重畳部位９１で帯筋４および筋交い７を相互に連結しているが、相互連結は必須ではなく、帯筋４を介することなく、筋交い７を山形鋼３Ａ〜３Ｄに直接連結するように構成してもよい。また、端部重畳部位９１とともにあるいは単独で、帯筋４および筋交い７を相互に連結してもよい（図４）。 By the way, although the strip 4 and the brace 7 are mutually connected at the end overlapping portion 91 in the above embodiment, the mutual connection is not essential, and the brace 7 is not required to be connected to the angle steel 3A to 3D. It may be configured to connect directly to the The band muscles 4 and the braces 7 may be mutually connected together with the end overlapping portion 91 or alone (FIG. 4).

図４は本発明に係る鉄筋コンクリート構造物の配筋構造の第２実施形態を示す図である。第２実施形態は第１実施形態と大きく相違する点は、端部重畳部位９１のみならず帯筋４の中央部と筋交い７の中央部とが重なり合う中央重畳部位９２についてもボルトなどの締結部材８により連結されている点である。このように中央重畳部位９２の相互連結によって山形鋼３Ａ〜３Ｄ、帯筋４、鉄筋５および筋交い７の一体性をさらに高めることができる。なお、図４に示す実施形態では、一部の中央重畳部位９２についてのみ上記相互連結を行っているが、複数の中央重畳部位９２のうち締結部材８を装着する箇所や個数などについては任意である。 FIG. 4 is a view showing a second embodiment of the reinforcement structure of the reinforced concrete structure according to the present invention. The second embodiment is largely different from the first embodiment in that not only the end overlapping portion 91 but also the central overlapping portion 92 in which the central portion of the strip 4 and the central portion of the brace 7 overlap is a fastening member such as a bolt It is a point connected by 8. Thus, the interconnection of the central overlapping portions 92 can further enhance the integrity of the angle steels 3A to 3D, the reinforcement bars 4, the reinforcing bars 5 and the reinforcements 7. In the embodiment shown in FIG. 4, although the above-mentioned mutual connection is performed only for a part of central superimposed portions 92, among the plurality of central superimposed portions 92, the place and the number etc. to which fastening members 8 are attached are arbitrary. is there.

また、上記実施形態では、山形鋼３Ａ〜３Ｄの補強のために外側に筋交い７を設けているが、例えば図５に示すように軸方向Ｚに対して垂直な仮想面（同図平面）内で互いに対向する山形鋼３の間に別の筋交い７１をさらに設けてもよい（第３実施形態）。なお、図５中の符号７２は筋交い７１を固定するための係合金具であり、溶接などによって山形鋼３に固定されている。 Moreover, in the said embodiment, although the brace 7 is provided in the outer side for reinforcement of angle steel 3A-3D, for example, as shown in FIG. Another bracing 71 may be further provided between the angle steels 3 facing each other (third embodiment). In addition, the code | symbol 72 in FIG. 5 is an engagement metal fitting for fixing the brace 71, and is being fixed to the angle steel 3 by welding etc. FIG.

なお、本発明は上記した実施形態に限定されるものではなく、その趣旨を逸脱しない限りにおいて上述したもの以外に種々の変更を行うことが可能である。例えば上記実施形態では、本発明の「第１主筋」として山形鋼３Ａ〜３Ｄを用いているが、山形鋼の代わりに軸方向と直交する仮想面で三角断面を有する鋼棒や同仮想面で矩形断面を有する鋼棒などを用いてもよい。 The present invention is not limited to the above-described embodiment, and various modifications can be made other than the above without departing from the scope of the invention. For example, in the above embodiment, angle steels 3A to 3D are used as the "first main bar" of the present invention, but instead of angle steels, steel rods having a triangular cross section in an imaginary plane orthogonal to the axial direction or the same imaginary plane A steel rod or the like having a rectangular cross section may be used.

また、上記実施形態では、筋交い７の交差角度（軸方向Ｚに対して筋交い７が交差する角度）を一定としているが、軸方向Ｚにおいて交差角度を相違させるように構成してもよい。つまり、鉄筋コンクリート構造物が長くなるにしたがって振動態様が軸方向Ｚの各部において相違するため、振動態様に応じて筋交い７の交差角度を異ならせることで振動に対する耐久性を高めることができる。より具体的には、高さ方向における中央部での筋交い７１の交差角度を上端部および下端部での筋交い７１の交差角度よりも小さくしてもよく、これによって、鉄筋コンクリート構造物の耐振動性を高めることができる。 Further, in the above embodiment, the crossing angle of the brace 7 (the angle at which the brace 7 intersects the axial direction Z) is constant, but the crossing angle may be different in the axial direction Z. That is, since the vibration mode is different in each part in the axial direction Z as the reinforced concrete structure becomes longer, the durability against vibration can be enhanced by changing the crossing angle of the brace 7 according to the vibration mode. More specifically, the crossing angle of the brace 71 at the center in the height direction may be smaller than the crossing angle of the brace 71 at the upper end and the lower end, whereby the vibration resistance of the reinforced concrete structure Can be enhanced.

また、上記実施形態では、矩形断面を有する柱状の鉄筋コンクリート構造物を構築するのに用いる柱用配筋構造１に対して本発明を適用しているが、矩形断面を有する梁状の鉄筋コンクリート構造物を構築するのに用いる梁用配筋構造に対して本発明を適用することができる。また、柱部と梁部とを有する鉄筋コンクリート構造物を構築するのに用いる配筋構造に対して本発明を適用することができる。 In the above embodiment, the present invention is applied to the column reinforcing bar structure 1 used to construct a column-shaped reinforced concrete structure having a rectangular cross section. However, a beam-like reinforced concrete structure having a rectangular cross section The present invention can be applied to the beam reinforcement structure used to construct the Further, the present invention can be applied to a reinforcement structure used to construct a reinforced concrete structure having a column portion and a beam portion.

また、上記実施形態では、柱および梁のいずれも矩形断面を有する鉄筋コンクリート構造物を構築するのに用いる配筋構造について説明したが、その他の断面形状を有する鉄筋コンクリート構造物に対しても本発明を適用することができる。つまり、Ｍ角形（Ｍ≧３）の断面を有する鉄筋コンクリート構造物の場合、第１主筋（山形鋼、矩形断面鋼棒など）をＭ本準備し、軸方向に直交する仮想面内でＭ角形を形成するとともにとともに軸方向Ｚに伸びるＭ角柱状の空間ＳＰを形成するように配置すればよい。 Further, in the above embodiment, the reinforcement structure used to construct a reinforced concrete structure having a rectangular cross section has been described, but the present invention is also applicable to reinforced concrete structures having other cross sectional shapes. It can apply. That is, in the case of a reinforced concrete structure having a cross section of M square (M ≧ 3), prepare M first main bars (angular steel, rectangular cross section steel bar, etc.) and place M square in a virtual plane orthogonal to the axial direction It may be arranged to form an M-shaped prism-like space SP extending in the axial direction Z as well as being formed.

また、上記実施形態では、帯筋４を本発明の「第１せん断補強筋」の一例として用いるとともに筋交い７を本発明の「第２せん断補強筋」の一例として用いるが、これらの関係を逆転させてもよい。 In the above embodiment, the strip 4 is used as an example of the “first shear reinforcing bar” of the present invention and the brace 7 is used as an example of the “second shear reinforcing bar” of the present invention. You may

以上説明したように、上記実施形態においては、山形鋼３Ａ〜３Ｄが本発明の「第１主筋」の一例に相当し、鉄筋５が本発明の「第２主筋」の一例に相当している。また、四角柱状の空間ＳＰが本発明の「Ｍ角柱状の空間」の一例に相当している。また、軸方向Ｚと直交する水平方向が本発明の「直交方向」の一例に相当している。 As described above, in the above-described embodiment, the angle steels 3A to 3D correspond to an example of the "first main bar" of the present invention, and the reinforcing bars 5 correspond to an example of the "second main bar" of the present invention. . Also, the square-pillar-shaped space SP corresponds to an example of the “M-square-pillar-shaped space” in the present invention. The horizontal direction orthogonal to the axial direction Z corresponds to an example of the “orthogonal direction” in the present invention.

この発明は、建築や土木工事などで多用されている鉄筋コンクリート構造物の配筋構造全般に適用することができる。 The present invention can be applied to the overall arrangement of reinforced concrete structures frequently used in construction and civil engineering work.

１…配筋構造
３Ａ〜３Ｄ…山形鋼（第１主筋）
４…帯筋（第１せん断補強筋）
５…鉄筋（第２主筋）
６…主筋体
７…筋交い（第２せん断補強筋）
８…締結部材
９１…端部重畳部位
９２…中央重畳部位
ＡＲ…隣接領域
ＳＰ…空間
Ｙ…直交方向
Ｚ…鉛直方向（軸方向） 1 ... Reinforcement structure 3A-3D ... Yamagata steel (the first main bar)
4 ... Band reinforcement (1st shear reinforcement)
5 Rebar (2nd main bar)
6 Main muscle body 7 Brace (2nd shear reinforcement)
8: Fastening member 91: End overlapping portion 92: Center overlapping portion AR: Adjacent region SP: Space Y: Orthogonal direction Z: Vertical direction (axial direction)

Claims

In order to form M square (M ≧ 3), M square (M を 3) in the imaginary plane orthogonal to the axial direction and M rectangular columnar space extending in the axial direction. , With the main muscle placed,
A plurality of first shear reinforcement bars disposed so as to face from the outside of the space an adjacent area sandwiched between the first main bars adjacent to each other, and connecting the adjacent first main bars;
A plurality of second main bars extending in the axial direction in the adjacent area and attached to the first shear reinforcement bar;
And a plurality of second shear reinforcement bars disposed adjacent to the outside of the plurality of first shear reinforcement bars and connecting the adjacent first main bars.
One of the first shear reinforcement bar and the second shear reinforcement bar is a strip extending in an orthogonal direction orthogonal to the axial direction, and the other is with respect to the orthogonal direction and the axial direction A reinforcement structure of a reinforced concrete structure characterized in that it is a diagonally extended crosswise extending brace.

It is a reinforcement structure of the reinforced concrete structure according to claim 1,
The reinforcement structure of a reinforced concrete structure, wherein the first shear reinforcement bar and the second shear reinforcement bar are made of band steel, and are arranged to overlap the first main bar in a direction from the space to the outside.

It is a reinforcement structure of the reinforced concrete structure of Claim 2, Comprising:
A fastening member is attached to an end overlapping portion where the end of the first shear reinforcement and the end of the second shear reinforcement overlap with the first main reinforcement in the direction from the space to the outside Relay structure of a reinforced concrete structure in which the first shear reinforcement bar and the second shear reinforcement bar are integrally connected to a main bar.

A reinforcement structure of a reinforced concrete structure according to any one of claims 1 to 3,
Arrangement of reinforced concrete structure in which the first shear reinforcement bar and the second shear reinforcement bar are connected at a central overlapping portion where the central portion of the first shear reinforcement bar and the central portion of the second shear reinforcement bar overlap with each other Construction.