JP2006104785A - Reinforcement with anchorage part - Google Patents

Reinforcement with anchorage part Download PDF

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JP2006104785A
JP2006104785A JP2004293583A JP2004293583A JP2006104785A JP 2006104785 A JP2006104785 A JP 2006104785A JP 2004293583 A JP2004293583 A JP 2004293583A JP 2004293583 A JP2004293583 A JP 2004293583A JP 2006104785 A JP2006104785 A JP 2006104785A
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reinforcing bar
main body
reinforcement
hook
fixing part
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Tomoyasu Kato
友康 加藤
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Kajima Corp
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Kajima Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcement with an anchorage part, which can be simply provided with the anchorage part, and which can be easily arranged as a shear reinforcement such as a main reinforcement and a hoop reinforcement. <P>SOLUTION: Hooks 2 and 2 are protruded as the anchorage parts at both ends of a reinforcement body 1 composed of a deformed bar respectively. The reinforcement body 1 and the hook 2 are integrally formed by using bar steel for reinforced concrete. The hook 2 is formed in such a flat plate-like shape as to be integrated with the reinforcement body 1, by bending an end of the reinforcement body 1 at an angle (right angle) of approximate 90° with respect to the axis of the reinforcement body 1. The plate thickness and width W of the hook 2 are set by adjusting press pressure, and the length L of the hook 2 is set by adjusting press length. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、ＲＣ構造やＳＲＣ構造の柱や梁などに主筋またはせん断補強筋などとして配筋される定着部付き鉄筋に関し、特に定着部の加工と配筋を容易にしたものである。   The present invention relates to a reinforcing bar with a fixing unit that is arranged as a main reinforcing bar or a shear reinforcing bar on a column or a beam of an RC structure or an SRC structure, and particularly facilitates processing and arranging of the fixing unit.

例えば、図５（ａ），（ｂ）に図示するように、ＲＣ構造の柱や梁には軸方向に沿って主筋１０が配筋され、また主筋１０の周囲にせん断補強筋１１が環状に配筋されている（閉鎖型配筋）。この場合、一般に主筋１０の端部には、端部をコンクリート中に確実に定着するために主筋１０の軸線に対して１８０度に折り曲げて形成されたフック（図省略）が設けられ、またせん断補強筋１１の端部は、例えば図５（ａ）、（ｂ）に図示するように、両端を溶接するか、あるいは端部に設けたフック１１ｂを主筋１０に巻き掛ける等して定着されている。   For example, as shown in FIGS. 5A and 5B, the main reinforcement 10 is arranged along the axial direction in the columns and beams of the RC structure, and the shear reinforcement 11 is annular around the main reinforcement 10. The bar is placed (closed type). In this case, generally, the end of the main bar 10 is provided with a hook (not shown) formed by being bent at 180 degrees with respect to the axis of the main bar 10 in order to securely fix the end in the concrete. For example, as shown in FIGS. 5A and 5B, the end of the reinforcing bar 11 is fixed by welding both ends or by winding a hook 11 b provided at the end around the main bar 10. Yes.

また特に、土木分野においては、主筋およびせん断補強筋ともに、建築分野に比べて径の太い鉄筋が多く用いられ、曲げ加工ができない場合があり、そのような場合には、例えば図５（ｃ）に図示するように、フックを設ける代わりに定着プレート１２が別部材として取り付けられることがある。
特開平８−２６０６１９号公報 特開平９−８８２４１号公報 Particularly, in the civil engineering field, both main reinforcing bars and shear reinforcing bars often use reinforcing bars having a diameter larger than that in the construction field, and bending may not be possible. In such a case, for example, FIG. As shown in FIG. 1, the fixing plate 12 may be attached as a separate member instead of providing a hook.
JP-A-8-260619 JP-A-9-88241

しかし、鉄筋の径が太いと、曲げ加工が非常に困難になる等の課題があり、またせん断補強筋には比較的細い径の鉄筋が用いられるものの、比較的大量に配筋されるため、曲げ加工が非常に煩わしい等の課題がある。さらに、フックを設ける代わりに定着プレート等の別部材を取り付けるとコストが嵩む等の課題がある。   However, if the diameter of the reinforcing bar is thick, there are problems such as bending becomes very difficult, and although a relatively thin diameter reinforcing bar is used for the shear reinforcement, it is arranged in a relatively large amount. There are problems such as extremely troublesome bending. Further, if another member such as a fixing plate is attached instead of providing a hook, there is a problem that the cost increases.

また、梁などのせん断補強筋は、複数の主筋間に環状に巻き架けて配筋されるため（閉鎖型配筋）、しかも場所により非常に密に配筋される場合もあり、さらにＳＲＣ構造の、特に柱と梁との接合部においては、例えば図５（ｄ）に図示するように、せん断補強筋１１は各梁の鉄骨材１３をそれぞれ貫通させて配筋する必要があるため、配筋が非常に面倒になる等の課題があった。   In addition, since the shear reinforcement bars such as beams are arranged in a loop between a plurality of main bars (closed type reinforcement), they may be arranged very densely depending on the location, and the SRC structure. In particular, at the junction between the column and the beam, for example, as shown in FIG. 5 (d), the shear reinforcement 11 needs to be laid through the steel frame 13 of each beam. There were problems such as the muscles becoming very troublesome.

本発明は以上の課題を解決するためになされたもので、定着部を簡単に設けることができ、かつ主筋やフープ筋などのせん断補強筋として容易に配筋することのできる定着部付き鉄筋を提供することを目的とする。   The present invention has been made in order to solve the above-described problems, and has a fixing portion-attached reinforcing bar that can easily provide a fixing portion and can be easily arranged as a shear reinforcing bar such as a main reinforcement or a hoop reinforcement. The purpose is to provide.

請求項１記載の定着部付き鉄筋は、鉄筋本体と当該鉄筋本体の端部に設けられた定着部とから形成され、前記定着部は前記鉄筋本体の端部から形成され、かつプレス加工と曲げ加工によって平板状にかつ前記鉄筋本体の軸線に対して所定の角度に折曲した状態に形成されてなることを特徴とするものである。   The reinforcing bar with a fixing part according to claim 1 is formed of a reinforcing bar main body and a fixing part provided at an end of the reinforcing bar main body, the fixing part is formed of an end of the reinforcing bar main body, and is pressed and bent. It is formed into a flat shape by processing and a state bent at a predetermined angle with respect to the axis of the rebar main body.

本発明は、主筋やせん断補強筋などとして用いられる鉄筋の端部にプレス加工と曲げ加工を行うだけで、平板状にかつ所定の角度に折曲した状態の定着部を有する定着部付き鉄筋を簡単に提供可能にしたことを特徴とするものである。   The present invention provides a reinforcing bar with a fixing part having a fixing part in a state of being flat and bent at a predetermined angle by simply pressing and bending the end part of a reinforcing bar used as a main reinforcing bar or a shear reinforcing bar. It is characterized in that it can be easily provided.

この場合、定着部が特にプレス加工と曲げ加工によって形成されることにより定着部の強度が著しく高められるため、ここで加工可能な鉄筋としては、比較的加工の容易な普通強度の鉄筋コンクリート用棒鋼の場合、ＲＣ基準で１８０°曲げ加工の可能な鋼棒はすべて用いることができ、例えばＳＲ２３５〜２９５またはＳＤ２３５〜３９０などを用いることができる。また、高強度鉄筋も熱処理することで用いることができる。   In this case, since the strength of the fixing portion is remarkably increased by forming the fixing portion by pressing and bending in particular, as a reinforcing bar that can be processed here, a steel bar for reinforced concrete having a normal strength that is relatively easy to process is used. In this case, all steel bars that can be bent by 180 ° based on RC can be used, for example, SR235-295 or SD235-390 can be used. Further, high-strength reinforcing bars can also be used by heat treatment.

請求項２記載の定着部付き鉄筋は、直線状に形成された鉄筋本体と当該鉄筋本体の両端部に設けられた定着部とから形成され、前記定着部は前記鉄筋本体の端部からプレス加工と折り曲げ加工によって平板状に、かつ前記鉄筋本体の軸線に対して所定の角度に折曲した状態に形成されてなることを特徴とするものである。   The reinforcing bar with fixing part according to claim 2 is formed of a reinforcing bar main body formed in a straight line and fixing parts provided at both ends of the reinforcing bar main body, and the fixing part is pressed from the end of the reinforcing bar main body. And bent into a flat plate shape and bent at a predetermined angle with respect to the axis of the rebar main body.

本発明は、直線状に形成された鉄筋本体と当該鉄筋本体の両端部に設けられた定着部とから形成され、特に梁などのせん断補強筋として用いることができる。この定着部付き鉄筋を梁などのせん断補強筋として用いれば、両端の定着部を主筋に巻き架けるだけで取り付けることができるため、せん断補強筋の配筋を非常に簡単に行うことができる。   The present invention is formed of a rebar main body formed in a straight line and fixing portions provided at both ends of the rebar main body, and can be used particularly as a shear reinforcing bar such as a beam. If this reinforcing bar with fixing part is used as a shear reinforcing bar such as a beam, the fixing part at both ends can be attached only by being wound around the main bar, so that the reinforcing bar can be arranged very easily.

請求項３記載の定着部付き鉄筋は、請求項１または２記載の定着部付き鉄筋において、定着部は鉄筋の軸線に対して９０°〜１８０°の範囲で所定の角度に折曲した状態に形成されてなることを特徴とするものである。定着部が平板状に形成されていることで、鉄筋本体が少々太くても定着部の曲げ加工が非常に簡単になり、任意の角度に自由に形成することができる。   The reinforcing bar with fixing portion according to claim 3 is the reinforcing bar with fixing portion according to claim 1 or 2, wherein the fixing portion is bent at a predetermined angle in a range of 90 ° to 180 ° with respect to the axis of the reinforcing bar. It is characterized by being formed. Since the fixing portion is formed in a flat plate shape, the bending process of the fixing portion is very simple even if the reinforcing bar body is a little thick, and can be freely formed at an arbitrary angle.

請求項４記載の定着部付き鉄筋は、請求項１〜３のいずれかに記載の定着部付き鉄筋において、鉄筋本体および定着部は鉄筋コンクリート用棒鋼からなる丸鋼または異形鉄筋から形成されてなることを特徴とするものである。特に、普通強度の鉄筋コンクリート用棒鋼を用いることにより、プレス加工および曲げ加工がともに非常に簡単になり、定着部付き鉄筋を簡単に形成することができる。   The reinforcing bar with a fixing part according to claim 4 is the reinforcing bar with a fixing part according to any one of claims 1 to 3, wherein the reinforcing bar body and the fixing part are formed of a round steel bar or a deformed reinforcing bar made of steel bars for reinforced concrete. It is characterized by. In particular, by using normal strength steel bars for reinforced concrete, both pressing and bending are very simple, and a reinforcing bar with a fixing portion can be easily formed.

本発明は、主筋やせん断補強筋などとして用いられる鉄筋の端部にプレス加工と曲げ加工を行うだけで、平板状にかつ所定の角度に折曲した状態の定着部を有する定着部付き鉄筋を簡単に提供することができる。   The present invention provides a reinforcing bar with a fixing part having a fixing part in a state of being flat and bent at a predetermined angle by simply pressing and bending the end part of a reinforcing bar used as a main reinforcing bar or a shear reinforcing bar. Can be provided easily.

図１と図２は、主にせん断補強筋として用いられる定着部付き鉄筋の一例を示し、異形鉄筋からなる鉄筋本体１の両端部に、定着部としてフック２がそれぞれ突設されている。鉄筋本体１は鉄筋コンクリート用棒鋼から所定の長さを有して直線状に形成され、フック２は特に鉄筋本体１と一体をなす平板状に、かつ鉄筋本体１の軸線に対してほぼ９０°（直角）に折り曲げられた状態に形成されている。   FIG. 1 and FIG. 2 show an example of a reinforcing bar with a fixing part mainly used as a shear reinforcing bar, and hooks 2 are provided as fixing parts at both ends of a reinforcing bar main body 1 made of a deformed reinforcing bar. The rebar main body 1 is formed in a straight line having a predetermined length from a steel bar for reinforced concrete, and the hook 2 is a flat plate that is integrally formed with the rebar main body 1 and approximately 90 ° with respect to the axis of the rebar main body 1 ( It is formed in a state of being bent at a right angle.

また、フック２は、図２（ａ）〜（ｄ）に図示するように鉄筋本体１の端部を所定の長さに渡って平板状にプレス加工され、かつ鉄筋本体１の軸線に対してほぼ直角に折り曲げられることによって形成されている。なお、フック２の板厚と幅Ｗはプレス圧を調整することにより、またフック２の長さＬはプレス長さを調整することにより任意の寸法に形成されている。   2A to 2D, the hook 2 is pressed into a flat plate at the end of the reinforcing bar main body 1 over a predetermined length, and with respect to the axis of the reinforcing bar main body 1. It is formed by being bent at a substantially right angle. The plate thickness and the width W of the hook 2 are formed to have arbitrary dimensions by adjusting the press pressure, and the length L of the hook 2 is adjusted by adjusting the press length.

図３（ａ），（ｂ）は、特に定着部の変形例を示し、それぞれ鉄筋本体１の端部に、フック２が鉄筋本体１と一体をなす平板状に、かつ鉄筋本体１の軸線に対してほぼ１３５°または１８０°に折り曲げた状態に形成されている。   3 (a) and 3 (b) show a modification of the fixing portion, in particular, at the end of the rebar main body 1, respectively, on the flat plate shape in which the hook 2 is integrated with the rebar main body 1, and on the axis of the rebar main body 1. On the other hand, it is formed in a state bent at approximately 135 ° or 180 °.

この場合のフック２も、図１（ａ），（ｂ）で説明したのと同様に、鉄筋本体１の端部を所定の長さに渡って平板状にプレスし、かつ鉄筋本体１の軸線に対してほぼ１３５°または１８０°に折り曲げることにより形成されている。   The hook 2 in this case also presses the end of the reinforcing bar main body 1 into a flat plate shape over a predetermined length as described with reference to FIGS. It is formed by bending at approximately 135 ° or 180 ° with respect to the angle.

図４（ａ）〜（ｂ）は、図１，２で説明した定着部付き鉄筋がＳＲＣ構造の柱と梁との接合部（仕口部）にせん断補強筋（フープ筋）として配筋されている例を示したものであり、せん断補強筋３は柱４の各側面側にそれぞれ配筋されている。   4 (a) to 4 (b), the reinforcing bar with the fixing portion described in FIGS. 1 and 2 is arranged as a shear reinforcement bar (hoop bar) at the joint (joint part) between the column and beam of the SRC structure. The shear reinforcing bar 3 is arranged on each side of the column 4.

また各せん断補強筋３は、梁の鉄骨材として配置されたＨ形鋼５のウェブ５ａを貫通して配筋され、かつ両端のフック３ａ，３ａを柱４の各コーナ部に配筋された柱４の主筋４ａ，４ａにそれぞれ巻き掛けて取り付けられている。なお、Ｈ形鋼５のウェブ５ａには、せん断補強筋３がフック３ａとともに貫通可能な貫通孔５ｂが横長（水平方向に長軸を有する楕円形の孔）に形成されている。   Each of the shear reinforcement bars 3 was laid through a web 5a of an H-shaped steel 5 arranged as a steel frame of the beam, and hooks 3a and 3a at both ends were laid at each corner portion of the column 4. The main bars 4a and 4a of the column 4 are respectively wound around and attached. In addition, in the web 5a of the H-shaped steel 5, a through hole 5b through which the shear reinforcing bar 3 can penetrate with the hook 3a is formed in a horizontally long shape (an elliptical hole having a long axis in the horizontal direction).

せん断補強筋３がこのように配筋されていることで、環状に閉鎖型配筋されたこれまでのせん断補強筋に比べて、せん断補強筋３を非常に簡単に配筋することができ、特にＳＲＣ構造では非常に実用性が期待できる。   Since the shear reinforcement bars 3 are arranged in this manner, the shear reinforcement bars 3 can be arranged very easily compared to the conventional shear reinforcement bars which are closed in a ring shape, In particular, the SRC structure can be expected to be very practical.

本発明は、鉄筋の端部にプレス加工と曲げ加工によって所定の角度に折り曲げられた定着部をきわめて簡単に形成することができる。また、体着部は平板状に形成されていることで、鉄筋が密集して配筋されている部分にも比較的容易に配筋することができる。   According to the present invention, it is possible to very easily form a fixing portion that is bent at a predetermined angle by pressing and bending at the end of a reinforcing bar. Further, since the body-attached portion is formed in a flat plate shape, it is possible to arrange the bars relatively easily even in a portion where the reinforcing bars are densely arranged.

せん断補強筋として利用される定着部付き鉄筋を示す正面図である。It is a front view which shows the reinforcing bar with a fixing | fixed part utilized as a shear reinforcement. （ａ）〜（ｄ）は、定着部付き鉄筋の加工手順を示す一部正面図である。(A)-(d) is a partial front view which shows the process sequence of the reinforcing bar with a fixing part. （ａ），（ｂ）は、定着部付き鉄筋の変形例を示す一部正面図である。(A), (b) is a partial front view which shows the modification of the reinforcing bar with a fixing | fixed part. ＳＲＣ構造の柱と梁との接合部にせん断補強筋として定着部付き鉄筋が配筋された例を示し、（ａ）は接合部の横断面図、（ｂ）は縦断面図である。An example in which a reinforcing bar with a fixing portion is arranged as a shear reinforcement bar at a joint portion between a column and a beam of an SRC structure is shown, (a) is a transverse sectional view of the joint portion, and (b) is a longitudinal sectional view. せん断補強筋の従来例を示し、（ａ）、（ｂ）、（ｃ）はそれぞれ梁のせん断補強筋の配筋例を示す断面図、（ｄ）は柱のせん断補強筋の配筋例を示す断面図である。The conventional example of a shear reinforcement is shown, (a), (b), (c) is sectional drawing which shows the example of the reinforcement of the shear reinforcement of a beam, respectively, (d) is the example of the reinforcement of the shear reinforcement of a column. It is sectional drawing shown.

符号の説明Explanation of symbols

１ 鉄筋本体
２ フック
３ せん断補強筋（定着部付き鉄筋）
３ａ フック
４ 柱
４ａ 柱の主筋
５ Ｈ形鋼
５ａ ウェブ
５ｂ 貫通孔 1 Rebar main body 2 Hook 3 Shear reinforcement (rebar with anchorage)
3a hook 4 pillar 4a pillar main bar 5 H-section steel 5a web 5b through hole

Claims (4)

鉄筋本体と当該鉄筋本体の端部に設けられた定着部とから形成され、前記定着部は前記鉄筋本体の端部から形成され、かつプレス加工と折り曲げ加工によって平板状にかつ前記鉄筋本体の軸線に対して所定の角度に折曲した状態に形成されてなることを特徴とする定着部付き鉄筋。   It is formed from a reinforcing bar main body and a fixing part provided at an end of the reinforcing bar main body, and the fixing part is formed from an end of the reinforcing bar main body, and is flattened by pressing and bending, and the axis of the reinforcing bar main body It is formed in the state bent at a predetermined angle to the reinforcing bar with fixing portion. 直線状に形成された鉄筋本体と当該鉄筋本体の両端部に設けられた定着部とから形成され、前記定着部は前記鉄筋本体の端部から形成され、かつプレス加工と折り曲げ加工によって平板状にかつ前記鉄筋本体の軸線に対して所定の角度に折曲した状態に形成されてなることを特徴とする定着部付き鉄筋。   It is formed from a rebar main body formed in a straight line and fixing portions provided at both ends of the rebar main body, and the fixing portion is formed from the end of the rebar main body, and is formed into a flat plate shape by pressing and bending. The reinforcing bar with a fixing portion is formed in a state bent at a predetermined angle with respect to the axis of the reinforcing bar main body. 定着部は鉄筋本体の軸線に対して９０°〜１８０°の範囲で所定の角度に折曲した状態に形成されてなることを特徴とする請求項１または２記載の定着部付き鉄筋。   The reinforcing bar with fixing part according to claim 1 or 2, wherein the fixing part is formed in a state bent at a predetermined angle in a range of 90 ° to 180 ° with respect to an axis of the reinforcing bar main body. 鉄筋本体および定着部は、鉄筋コンクリート用棒鋼からなる丸鋼または異形鉄筋から形成されてなることを特徴とする請求１〜３のいずれかに記載の定着部付き鉄筋。   The reinforcing bar body with fixing part according to any one of claims 1 to 3, wherein the reinforcing bar main body and the fixing part are formed of round steel bars or deformed reinforcing bars made of steel bars for reinforced concrete.
JP2004293583A 2004-10-06 2004-10-06 Reinforcement with anchorage part Withdrawn JP2006104785A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010106564A (en) * 2008-10-30 2010-05-13 Kyoei Steel Ltd Reinforcement with anchorage part, reinforcement element with anchorage part and anchor bolt
JP2010168740A (en) * 2009-01-20 2010-08-05 Kyoei Steel Ltd Opening reinforcing structure
JP2010255227A (en) * 2009-04-22 2010-11-11 Kyoei Steel Ltd Column-beam joint structure and reinforced concrete member
JP2013238073A (en) * 2012-05-16 2013-11-28 Hayakawa Rubber Co Ltd Fixing device for member for partial loss of section

Cited By (4)

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JP2010106564A (en) * 2008-10-30 2010-05-13 Kyoei Steel Ltd Reinforcement with anchorage part, reinforcement element with anchorage part and anchor bolt
JP2010168740A (en) * 2009-01-20 2010-08-05 Kyoei Steel Ltd Opening reinforcing structure
JP2010255227A (en) * 2009-04-22 2010-11-11 Kyoei Steel Ltd Column-beam joint structure and reinforced concrete member
JP2013238073A (en) * 2012-05-16 2013-11-28 Hayakawa Rubber Co Ltd Fixing device for member for partial loss of section

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