JP4727091B2 - Steel joint structures in reinforced steel concrete structures - Google Patents

Steel joint structures in reinforced steel concrete structures Download PDF

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Publication number
JP4727091B2
JP4727091B2 JP2001273999A JP2001273999A JP4727091B2 JP 4727091 B2 JP4727091 B2 JP 4727091B2 JP 2001273999 A JP2001273999 A JP 2001273999A JP 2001273999 A JP2001273999 A JP 2001273999A JP 4727091 B2 JP4727091 B2 JP 4727091B2
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steel
cylindrical body
concrete
reinforced
joint structure
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JP2003082774A (en
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充 柴沼
義隆 大嶋
徹也 三島
秀公 今西
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Maeda Corp
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Maeda Corp
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Description

【0001】
【発明の属する技術分野】
本発明は鉄筋鉄骨コンクリート構造物における鉄骨継手構造に関し、更に詳細には補強材として鉄筋と鉄骨を内部に入れたコンクリート構造物において、一軸線上に配置された鉄骨同士の端部をつなぐ継手の構造に関する。
【0002】
【従来の技術】
従来、鉄筋鉄骨コンクリート構造物において、鉄筋と共に補強材として入れられる鉄骨はH形鋼が使用されることが多い。このようなH形鋼からなる鉄骨を継ぎ足す場合には、一般的に図8(a)及び図8(b)に示されるように2つの鉄骨1、2の端部1a、2aを突き合わせ、この突き合わせ部を溶接する方法、及びH形鋼の突き合わせ部を跨ぐようにウエブ面或いはフランジ面、若しくはその両方に継手板3を配置して高力ボルト又はリベット4で固定する方法等が代表的である。
【0003】
【発明が解決しようとする課題】
しかしながら、従来の鉄筋鉄骨コンクリート構造物において補強材として用いる鉄骨の継手構造は、鉄骨構造物での鉄骨継手をそのまま利用したものであり、このような構造に伴う不利益もそのまま引き継いでいる。
【0004】
すなわち、鉄骨同士を突き合わせて溶接する、突き合わせ溶接による継手構造の場合には、熟練した技能員による精度の高い溶接作業が要求され、そのため非常に時間が掛かると共に熟練した技能員を確保すること自体難しいという問題があった。
【0005】
また、継手板3をH形鋼のウエブ又はフランジに配置して高力ボルト又はリベット4で固定する継手構造では、全ての高力ボルトの締め付けに相当な時間が掛かると共にその施工作業も繁雑で労力が掛かり、またその確認(全ての高力ボルトが設計通りに締め付けられているか否かの確認)にも相当な時間が掛かるという問題があった。
【0006】
更に継手板3をリベット4でH形鋼に固着する方法では、リベット4の取り付けに準備と多大な時間及び労力を費やし、施工時間が掛かるばかりではなく施工コストも高騰するという問題があった。更に、突き合わせ溶接による鉄骨の継手方法や高力ボルト又はリベットによる鉄骨の接続方法を高所で実施する場合には、前述したように施工作業の繁雑さや高精度の要求から安全面でも望ましくないという問題があった。
【0007】
更にまた、このような2つの鉄骨1、2の端部1a、2aを突き合わせて溶接する方法や継手板3と高力ボルト又はリベット4を用いて接続する方法は、突き合わされる鉄骨1、2の断面形状とその大きさがほぼ同じ場合でなければ強度的に有効な継手構造とはならないという重要な問題があった。
【0008】
本発明の目的は、かかる従来の問題点を解決するためになされたもので、鉄筋鉄骨コンクリート構造物において補強材として用いる2つの鉄骨の端部同士を短時間に且つ容易に接続でき、更には高所でも安全に接続作業が可能であると共に断面形状や大きさが異なる鉄骨同士でも容易に接続できる継手構造を提供することにある。
【0009】
【課題を解決するための手段】
本発明は鉄筋鉄骨コンクリート構造物における鉄骨継手構造であり、前述した技術的課題を解決するために以下のように構成されている。すなわち、本発明の鉄筋鉄骨コンクリート構造物における鉄骨継手構造は、表面の少なくとも一部に多数の突起を形成した鉄骨を補強材として入れた鉄筋鉄骨コンクリート構造物において、一軸線上に配置された2つの鉄骨の対向端部を突き合わせ、各端部が突き合わされた鉄骨の両端部側を包囲するように筒状体を配置し、更に筒状体の内部にモルタル又はコンクリートを充填して構成され、筒状体の内面にも多数の突起が形成されていることを特徴とする。
【0010】
また、本発明の鉄筋鉄骨コンクリート構造物における鉄骨継手構造は、表面の少なくとも一部に多数の突起を形成した鉄骨を補強材として入れた鉄筋鉄骨コンクリート構造物において、一軸線上に配置された2つの鉄骨の一方の端部を有底筒状体の底部外面に堅固に固着し、他方の鉄骨の対向端部を有底筒状体の開口部から内部に入れて、2つの鉄骨を一軸線上に並べ、筒状体の内部にモルタル又はコンクリートを充填して構成され、筒状体の内面にも多数の突起が形成されていることを特徴とする。
【0011】
〈本発明における具体的構成〉
本発明の鉄筋鉄骨コンクリート構造物における鉄骨継手構造は、前述した必須の構成要素からなるが、その構成要素が具体的に以下のような場合であっても成立する。その具体的構成要素とは、前記鉄骨が、湾状の窪み部を有する断面形状のH形鋼、I形鋼、みぞ形鋼、又は山形鋼のいずれかの形鋼であり、筒状体内に充填されたモルタル又はコンクリート中に埋没する形鋼の端部には、表面に多数の突起が付けられた板部材が断面で見て窪み部を閉鎖するような位置にあって鉄骨に固着されていることを特徴とする。
【0012】
また、本発明の鉄筋鉄骨コンクリート構造物における鉄骨継手構造では、筒状体の断面形状が、四角形又は円形のいずれかであることを特徴とする。
【0013】
【発明の実施の形態】
以下、本発明の鉄筋鉄骨コンクリート構造物における鉄骨継手構造を図に示される実施形態について更に詳細に説明する。図1〜図3には本発明の第1実施形態に係る鉄筋鉄骨コンクリート構造物における鉄骨継手構造(以下、鉄骨継手構造と称する)10が示されている。
【0014】
この第1実施形態に係る鉄骨継手構造10は、鉄筋鉄骨コンクリート構造物の補強材として一軸線上に配置された2つの鉄骨11、12の対向端部を突き合わせ、各端部が突き合わされた鉄骨11、12の両端部側を包囲するように両端が開放した1つの筒状体13が配置されて構成されている。
【0015】
この実施形態では、鉄筋鉄骨コンクリート構造物の補強材として使用される鉄骨11、12はH形鋼であり、そのフランジ部11a、12aの表面にはH形鋼の長手方向軸線に直交する方向即ちフランジ部の幅方向に伸長した線状の突起14が相互に間隔をあけて並列に多数形成されている。
【0016】
この突起14は、コンクリート又はモルタルとの付着力を高めるものであり、そのため突起の形状などには特に限定されないが、最も好ましい形状としては、図1に示されるようなフランジ部11a、12aの幅方向に伸長した線状である。しかし、突起14の形状としてフランジ部の幅方向に伸長した波形状でもよく、或いはフランジ部11a、12aの表面にドット状即ち点状に形成されていてもよい。
【0017】
それぞれH形鋼からなる各鉄骨11、12において突き合わされる端部側では、相対向するフランジ部11a、12aの縁部間に、表面に多数の突起15が付けられた板部材16が配置され、この板部材16の側縁部とフランジ部の各縁部とが溶接によりに固着されている。
【0018】
これにより、断面H形の鉄骨側部に存在している凹部即ち窪んだ部分11b、12bが板部材16により塞がれ、図3に示されるように断面四角形状とされている。その結果、H形鋼からなる各鉄骨端部は、突起の付いた表面としてフランジ部11a、12aの表面以外に2面が追加されて合計4面となり、後述するように各鉄骨端部の周囲に配置されるモルタル又はコンクリートとの付着力をより高めることができる。
【0019】
この板部材16は、その一端が少なくとも突き合わされる鉄骨端部に位置し、且つ他端がこの突き合わせ端部付近を包囲する筒状体13から飛び出た位置に来るような長さのものであることが好ましい。従って、板部材16の長さは、後述する筒状体13の長さの半分程度か、或いはそれよりも若干長いものを使用することがよい。
【0020】
ところで、一軸線上に配置された2つの鉄骨11、12の継手構造では、各鉄骨11、12の対向端部が突き合わされるが、ここで「突き合わせ」とは端部同士が当接することだけを意味するものではなく、僅かに隙間をあけて対峙する状態も含む意味である。
【0021】
各端部が突き合わされた鉄骨11、12の両端部側を包囲するように配置された筒状体13は、鋼板で形成され、その内周面には周方向に伸長する線状の突起17が長手方向に多数並列して設けられている。筒状体13の内周面に設けられる突起17も、各鉄骨のフランジ部表面に設けられる突起14と同様にモルタル又はコンクリートとの付着力を高めるものである。
【0022】
従って、この突起17の形状も特に限定されず、突起17の形状として筒状体13の周方向に伸長した波形状でもよく、或いは内周面にドット状即ち点状に形成されていてもよい。また、この実施形態の場合には、2つの鉄骨11、12の突き合わせ端部が、図2に示されるように筒状体13の長さのほぼ半分の位置に存在するように相対的に位置決めされている。
【0023】
このように一軸線上に配置された2つの鉄骨11、12の突き合わせ端部付近を内部に収容した筒状体13の内部にはモルタル又はコンクリート18が充填される。言い換えれば、板部材16によって断面が四角形状に形成された2つの鉄骨11、12の突き合わせ端部付近の外周囲と筒状体13の内面との間にモルタル又はコンクリート18が充填される。
【0024】
これにより筒状体13の内側に充填されたモルタル又はコンクリート18は鉄骨のフランジ部表面に設けられた突起14、板部材16の表面に設けられた突起15及び筒状体13の内周面に設けられた突起17が作用して鉄骨11、12及び筒状体13に強力に付着してこれらが一体化即ちモルタル又はコンクリート18を介して堅固に連結され、鉄骨継手構造10が構成される。
【0025】
そして、この鉄骨継手構造10が鉄筋鉄骨コンクリート構造物の補強材としてコンクリート構造部を形成するコンクリート内に埋設される時、このコンクリートは、図4に矢印19で示されるように断面H形の各鉄骨11、12における側方の凹部即ち窪んだ部分11b、12bを閉鎖している板部材16の長手方向端部付近の開放部からこの凹部11b、12b内に進入し、これにより鉄骨継手構造10が内外においてコンクリート構造部を形成するコンクリートと一体化されることになる。
【0026】
図5〜図7は、本発明の第2実施形態に係る鉄筋鉄骨コンクリート構造物における鉄骨継手構造20を示している。この実施形態に係る鉄骨継手構造20を示す図5〜図7において、図1〜図4に示される第1実施形態に係る鉄骨継手構造10と同じ又は相当する構成要素には同一の参照符号を付して詳細な説明を省略する。
【0027】
この第2実施形態に係る鉄骨継手構造20では、一軸線上に配置された、H形鋼からなり且つフランジ部11a、12aの表面に線状の突起14が形成された2つの鉄骨11、12のうち、一方の鉄骨12の端部が有底筒状体21の底部21a外面に突き合わされて溶接され、他方の鉄骨11を有底筒状体21の開口部21bから内部に入れ、端部を有底筒状体21の底部21a内面に単に突き合わせるように配置して構成されている。
【0028】
その際、有底筒状体21の開口部21から内部に入れられた鉄骨11の端部付近(有底筒状体21の内部に主として位置する端部付近)では、相対向するフランジ部11aの縁部間に、表面に多数の突起15が付けられた板部材16が配置され、この板部材16の側縁部とフランジ部の各縁部とが溶接によりに固着されている。
【0029】
これにより、断面H形の鉄骨側部に存在している凹部即ち窪んだ部分11bが板部材16により塞がれ、図7に示されるように結果として有底筒状体21内部の鉄骨11は断面四角形状とされている。有底筒状体21は、第1実施形態の筒状体13と同様に鋼板で形成され、その内周面には周方向に伸長する線状の突起22が長手方向に多数並列して設けられている。
【0030】
この有底筒状体21の内周面に設けられる突起22も、各鉄骨11、12のフランジ部表面に設けられる突起14と同様にモルタル又はコンクリートとの付着力を高めるものであり、従って、この突起22の形状も特に限定されず、有底筒状体21の周方向に伸長した波形状でもよく、或いは内周面にドット状即ち点状に形成されていてもよい。
【0031】
その後、有底筒状体21の底部21aを挟んで端部が突き合わせられるように一軸線上に配置された2つの鉄骨11、12の内、一方の鉄骨11の端部側を内部に収容した有底筒状体21の内部にモルタル又はコンクリート18が充填される。言い換えれば、板部材16によって断面が四角形状に形成された一方の鉄骨11の端部付近の外周囲と筒状体21の内面との間にモルタル又はコンクリート18が充填される。
【0032】
これにより有底筒状体21の内側に充填されたモルタル又はコンクリート18は鉄骨のフランジ部表面に設けられた突起14、板部材16の表面に設けられた突起15及び有底筒状体21の内周面に設けられた突起22が作用して鉄骨11と有底筒状体21とに強力に付着してこれらが一体化即ちモルタル又はコンクリート18を介して堅固に連結され、鉄骨継手構造20が構成される。
【0033】
そして、この鉄骨継手構造20が鉄筋鉄骨コンクリート構造物の補強材としてコンクリート構造部を形成するコンクリート内に埋設される時、このコンクリートは、第2実施形態と同様に断面H形の鉄骨11における側方の凹部即ち窪んだ部分11bを閉鎖している板部材16の長手方向端部付近の開放部からこの凹部11b内に進入し、これにより鉄骨継手構造20が内外においてコンクリート構造部を形成するコンクリートと一体化されることになる。
【0034】
前述した2つの実施形態に係る鉄骨継手構造10、20では、いずれも筒状体13及び有底筒状体21が断面円形のものであったが、本発明はこのような断面形状に限定されるものではなく、断面が四角形の筒状体又は有底筒状体を用いてもよい。
【0035】
また、前述した各実施形態の鉄骨継手構造10、20では、鉄骨11、12としてH形鋼を例にして説明したが、本発明はこの点についてもH形鋼に限定されるものではなく、湾状の窪み部を有する断面形状のI形鋼、みぞ形鋼、又は山形鋼等の形鋼を用いることができ、これらの形鋼のいずれを使用するかは、鉄筋鉄骨コンクリート構造物において形鋼を用いる箇所の設計強度等を考慮に入れて決められる。
【0036】
【発明の効果】
以上説明したように、本発明の鉄筋鉄骨コンクリート構造物における鉄骨継手構造によれば、鉄筋鉄骨コンクリート構造物において補強材として用いる2つの鉄骨の端部を相互に突き合わせるか、若しくは一方の鉄骨の端部に溶接された有底筒状体の底部を挟んで突き合わせ、前記有底筒状体で一方の鉄骨端部のみを包囲するか又は両端開放の筒状体で両方の鉄骨端部を包囲し、その内部にモルタル又はコンクリートを充填して一体化するようにしたことから、2つの鉄骨の端部同士を短時間に且つ容易に接続でき、更には高所でも安全に接続作業が可能となる。
【0037】
また、本発明の鉄筋鉄骨コンクリート構造物における鉄骨継手構造によれば、一軸線上に配置された2つの鉄骨の端部同士を従来技術のように直接接続するような構造ではないため、2つの鉄骨の断面形状が多少異なっても、或いは大きさが多少異なっても、接続強度を低下させることなく両鉄骨を繋ぎ合わせることができる。
【図面の簡単な説明】
【図1】本発明の第1実施形態に係る鉄筋鉄骨コンクリート構造物における鉄骨継手構造を概略的に示す斜視図である。
【図2】図1に示される鉄筋鉄骨コンクリート構造物における鉄骨継手構造の縦断面図である。
【図3】図2に示される鉄筋鉄骨コンクリート構造物における鉄骨継手構造を図2の3−3線に沿って切断して示す横断面図である。
【図4】図1に示される鉄筋鉄骨コンクリート構造物における鉄骨継手構造の一部を拡大して示す部分的な斜視図である。
【図5】本発明の第2実施形態に係る鉄筋鉄骨コンクリート構造物における鉄骨継手構造を概略的に示す斜視図である。
【図6】図5に示される鉄筋鉄骨コンクリート構造物における鉄骨継手構造の縦断面図である。
【図7】図6に示される鉄筋鉄骨コンクリート構造物における鉄骨継手構造を図6の7−7線に沿って切断して示す横断面図である。
【図8】従来の鉄骨継手構造を概略的に示す斜視図である。
【符号の説明】
10 第1実施形態の鉄筋鉄骨コンクリート構造物における鉄骨継手構造
11 鉄骨
11a フランジ部
11b 窪み部
12 鉄骨
12a フランジ部
12a 窪み部
13 筒状体
14 線状の突起
15 線状の突起
16 板部材
17 線状の突起
18 モルタル又はコンクリート
19 モルタル又はコンクリートが窪み部に入る矢印
20 第2実施形態の鉄筋鉄骨コンクリート構造物における鉄骨継手構造
21 有底筒状体
22 線状の突起
[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a steel joint structure in a reinforced steel concrete structure, and more specifically, in a concrete structure in which a reinforcing bar and a steel frame are placed as a reinforcing material, a joint structure that connects ends of steel frames arranged on one axis. About.
[0002]
[Prior art]
Conventionally, in a reinforced steel concrete structure, an H-shaped steel is often used as the steel frame that is put together with the reinforcing bar as a reinforcing material. When adding a steel frame made of such H-shaped steel, the ends 1a and 2a of the two steel frames 1 and 2 are generally abutted as shown in FIGS. 8 (a) and 8 (b). Typical methods include welding this butted part and a method of placing the joint plate 3 on the web surface or flange surface or both so as to straddle the H-shaped steel butted part and fixing with a high-strength bolt or rivet 4. It is.
[0003]
[Problems to be solved by the invention]
However, the steel joint structure used as a reinforcing material in the conventional reinforced steel concrete structure uses the steel joint in the steel structure as it is, and the disadvantages associated with such a structure are inherited as they are.
[0004]
That is, in the case of a joint structure by butt welding, in which the steel frames are welded together, high-precision welding work by skilled technicians is required, so that it takes time and secures skilled technicians themselves There was a problem that it was difficult.
[0005]
Further, in the joint structure in which the joint plate 3 is arranged on the H-shaped steel web or flange and fixed with the high-strength bolts or rivets 4, it takes a considerable time to tighten all the high-strength bolts and the construction work is complicated. There is a problem that labor is required and that it takes a considerable time to check (check whether all high-strength bolts are tightened as designed).
[0006]
Furthermore, in the method of fixing the joint plate 3 to the H-shaped steel with the rivet 4, there is a problem that preparation and a great deal of time and labor are required for attaching the rivet 4, and it takes not only construction time but also construction cost. Furthermore, when the steel joint method using butt welding and the steel connection method using high-strength bolts or rivets are carried out at a high place, it is not desirable in terms of safety due to the complexity of construction work and high precision requirements as described above. There was a problem.
[0007]
Furthermore, such a method of abutting and welding the ends 1a and 2a of the two steel frames 1 and 2 and a method of connecting the joint plate 3 and the high-strength bolts or rivets 4 include the steel frames 1 and 2 to be abutted. There is an important problem that the joint structure is not effective in terms of strength unless the cross-sectional shape and the size are substantially the same.
[0008]
The object of the present invention was made to solve such conventional problems, and can easily connect the ends of two steel frames used as reinforcing materials in a reinforced steel concrete structure in a short time. An object of the present invention is to provide a joint structure that can be safely connected even at high places and that can easily connect steel frames having different cross-sectional shapes and sizes.
[0009]
[Means for Solving the Problems]
The present invention is a steel joint structure in a reinforced steel concrete structure, and is configured as follows in order to solve the technical problems described above. That is, the steel joint structure in the reinforced steel concrete structure of the present invention is a reinforced steel concrete structure in which a steel frame having a large number of protrusions formed on at least a part of the surface is used as a reinforcing material. A cylindrical body is arranged so that opposite ends of the steel frame are abutted, and both ends of the steel frame where each end is abutted are surrounded, and the inside of the cylindrical body is filled with mortar or concrete. A large number of protrusions are also formed on the inner surface of the shaped body.
[0010]
Further, the steel joint structure in the reinforced steel concrete structure of the present invention is a reinforced steel concrete structure in which a steel frame in which a large number of protrusions are formed on at least a part of the surface is used as a reinforcing material. One end of the steel frame is firmly fixed to the bottom outer surface of the bottomed cylindrical body, and the opposite end of the other steel frame is inserted into the inside from the opening of the bottomed cylindrical body so that the two steel frames are on one axis. The cylindrical body is arranged and filled with mortar or concrete, and a large number of protrusions are formed on the inner surface of the cylindrical body.
[0011]
<Specific Configuration in the Present Invention>
The steel joint structure in the reinforced steel concrete structure of the present invention is composed of the above-described essential constituent elements, but it is established even when the constituent elements are specifically as follows. The concrete component is a section steel of any of H-shaped steel, I-shaped steel, groove-shaped steel, or angle-shaped steel having a cross-sectional shape having a bay-shaped depression, and the steel frame is formed in a cylindrical body. At the end of the shape steel buried in the filled mortar or concrete, the plate member with a number of protrusions on the surface is positioned so as to close the depression when viewed in cross section and fixed to the steel frame It is characterized by being.
[0012]
In the steel joint structure in the reinforced steel concrete structure of the present invention, the cross-sectional shape of the cylindrical body is either a square or a circle.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a steel joint structure in a reinforced steel concrete structure of the present invention will be described in more detail with respect to an embodiment shown in the drawings. 1 to 3 show a steel joint structure (hereinafter referred to as a steel joint structure) 10 in a reinforced steel concrete structure according to a first embodiment of the present invention.
[0014]
The steel joint structure 10 according to the first embodiment is a steel frame 11 in which opposed ends of two steel frames 11 and 12 arranged on one axis as a reinforcing material of a reinforced steel concrete structure are butted and each end is butted. , 12 is configured by arranging one cylindrical body 13 having both ends open so as to surround both ends.
[0015]
In this embodiment, the steel frames 11 and 12 used as a reinforcing material for the reinforced steel concrete structure are H-shaped steel, and the flange portions 11a and 12a have a surface perpendicular to the longitudinal axis of the H-shaped steel. A large number of linear protrusions 14 extending in the width direction of the flange portion are formed in parallel at intervals.
[0016]
The protrusions 14 are intended to increase the adhesion force with concrete or mortar, and therefore are not particularly limited in the shape of the protrusions, etc., but the most preferable shape is the width of the flange portions 11a and 12a as shown in FIG. A linear shape extending in the direction. However, the shape of the protrusion 14 may be a wave shape extending in the width direction of the flange portion, or may be formed in a dot shape, that is, a dot shape on the surfaces of the flange portions 11a and 12a.
[0017]
A plate member 16 having a large number of projections 15 on the surface is disposed between the edges of the flange portions 11a and 12a facing each other on the end portion side of each of the steel frames 11 and 12 made of H-shaped steel. The side edge portions of the plate member 16 and the respective edge portions of the flange portion are fixed by welding.
[0018]
As a result, the concave portions, that is, the recessed portions 11b and 12b existing on the side of the steel frame having an H-shaped cross section are closed by the plate member 16 so as to have a quadrangular cross section as shown in FIG. As a result, each steel end made of H-shaped steel has a total of four surfaces, with two surfaces being added in addition to the surfaces of the flange portions 11a and 12a as the surface with protrusions. The adhesion force with the mortar or concrete arranged in the can be further increased.
[0019]
The plate member 16 has a length such that one end of the plate member 16 is positioned at the end of the steel frame that is at least abutted and the other end is located at a position protruding from the cylindrical body 13 surrounding the vicinity of the abutting end. It is preferable. Therefore, the length of the plate member 16 is preferably about half of the length of the cylindrical body 13 to be described later, or slightly longer than that.
[0020]
By the way, in the joint structure of the two steel frames 11 and 12 arranged on one axis, the opposed end portions of the steel frames 11 and 12 are abutted, but here, “abutment” means that the end portions abut each other. It does not mean that it includes the state of facing each other with a slight gap.
[0021]
The cylindrical body 13 arranged so as to surround both ends of the steel frames 11 and 12 with which each end is abutted is formed of a steel plate, and a linear protrusion 17 extending in the circumferential direction on the inner peripheral surface thereof. Are provided in parallel in the longitudinal direction. The projections 17 provided on the inner peripheral surface of the cylindrical body 13 also increase the adhesion force with mortar or concrete, like the projections 14 provided on the surface of the flange portion of each steel frame.
[0022]
Accordingly, the shape of the protrusion 17 is not particularly limited, and the shape of the protrusion 17 may be a wave shape extending in the circumferential direction of the cylindrical body 13 or may be formed in a dot shape, that is, a dot shape on the inner peripheral surface. . Further, in the case of this embodiment, the two steel frames 11 and 12 are relatively positioned so that the butted ends of the two steel frames 11 and 12 exist at approximately half the length of the cylindrical body 13 as shown in FIG. Has been.
[0023]
Thus, the inside of the cylindrical body 13 that accommodates the vicinity of the butted ends of the two steel frames 11 and 12 arranged on one axis is filled with mortar or concrete 18. In other words, the mortar or concrete 18 is filled between the outer periphery in the vicinity of the butted ends of the two steel frames 11 and 12 whose cross sections are formed in a square shape by the plate member 16 and the inner surface of the cylindrical body 13.
[0024]
As a result, the mortar or concrete 18 filled inside the cylindrical body 13 is formed on the protrusion 14 provided on the surface of the flange portion of the steel frame, the protrusion 15 provided on the surface of the plate member 16, and the inner peripheral surface of the cylindrical body 13. The provided projections 17 act to strongly adhere to the steel frames 11, 12 and the tubular body 13, and these are firmly connected through integration, that is, mortar or concrete 18, thereby forming the steel joint structure 10.
[0025]
Then, when the steel joint structure 10 is embedded in the concrete forming the concrete structure portion as a reinforcing material for the reinforced steel concrete structure, the concrete has each an H-shaped cross section as indicated by an arrow 19 in FIG. The steel frames 11 and 12 enter the recesses 11b and 12b from the open portions near the longitudinal ends of the plate members 16 closing the side recesses or recessed portions 11b and 12b of the steel frames 11 and 12, respectively. Is integrated with the concrete forming the concrete structure inside and outside.
[0026]
5 to 7 show a steel joint structure 20 in a reinforced steel concrete structure according to a second embodiment of the present invention. 5-7 which show the steel joint structure 20 which concerns on this embodiment, the same referential mark is given to the same or equivalent component as the steel joint structure 10 which concerns on 1st Embodiment shown by FIGS. 1-4. Detailed description will be omitted.
[0027]
In the steel joint structure 20 according to the second embodiment, the two steel frames 11 and 12 are arranged on one axis, are made of H-shaped steel, and are formed with linear protrusions 14 on the surfaces of the flange portions 11a and 12a. Of these, the end of one steel frame 12 is abutted against and welded to the outer surface of the bottom 21a of the bottomed tubular body 21, and the other steel frame 11 is inserted into the inside through the opening 21b of the bottomed tubular body 21. The bottomed cylindrical body 21 is arranged so as to simply face the inner surface of the bottom 21a.
[0028]
At that time, in the vicinity of the end portion of the steel frame 11 (in the vicinity of the end portion mainly located inside the bottomed tubular body 21) inserted into the inside from the opening 21 of the bottomed tubular body 21, the opposing flange portions 11 a. A plate member 16 having a large number of projections 15 on the surface is disposed between the edges of the plate member 16, and the side edge portions of the plate member 16 and the respective edge portions of the flange portion are fixed by welding.
[0029]
As a result, the concave portion, that is, the depressed portion 11b existing on the side portion of the steel frame having an H-shaped cross section is closed by the plate member 16, and as a result, as shown in FIG. The cross section is rectangular. The bottomed cylindrical body 21 is formed of a steel plate like the cylindrical body 13 of the first embodiment, and a large number of linear protrusions 22 extending in the circumferential direction are provided in parallel in the longitudinal direction on the inner peripheral surface thereof. It has been.
[0030]
The protrusions 22 provided on the inner peripheral surface of the bottomed cylindrical body 21 also increase the adhesive force with mortar or concrete in the same manner as the protrusions 14 provided on the flange surface of each steel frame 11, 12. The shape of the protrusion 22 is not particularly limited, and may be a wave shape extending in the circumferential direction of the bottomed cylindrical body 21 or may be formed in a dot shape, that is, a dot shape on the inner peripheral surface.
[0031]
After that, of the two steel frames 11 and 12 arranged on one axis so that the ends are abutted across the bottom portion 21a of the bottomed cylindrical body 21, the end portion side of one steel frame 11 is accommodated inside. The bottom cylindrical body 21 is filled with mortar or concrete 18. In other words, the mortar or concrete 18 is filled between the outer periphery in the vicinity of the end of one of the steel frames 11 and the inner surface of the cylindrical body 21 whose cross section is formed in a square shape by the plate member 16.
[0032]
As a result, the mortar or concrete 18 filled inside the bottomed cylindrical body 21 is formed of the protrusions 14 provided on the surface of the flange portion of the steel frame, the protrusions 15 provided on the surface of the plate member 16, and the bottomed cylindrical body 21. The protrusions 22 provided on the inner peripheral surface act to strongly adhere to the steel frame 11 and the bottomed cylindrical body 21, and these are firmly integrated, that is, firmly connected via the mortar or concrete 18, and the steel joint structure 20 Is configured.
[0033]
And when this steel-frame joint structure 20 is embed | buried in the concrete which forms a concrete structure part as a reinforcing material of a reinforced steel concrete structure, this concrete is the side in the steel frame 11 of the cross-section H shape similarly to 2nd Embodiment. The concrete in which the steel joint structure 20 forms a concrete structure portion inside and outside through the open portion near the longitudinal end portion of the plate member 16 closing the concave portion, that is, the recessed portion 11b. Will be integrated.
[0034]
In the steel joint structures 10 and 20 according to the two embodiments described above, the cylindrical body 13 and the bottomed cylindrical body 21 are both circular in cross section, but the present invention is limited to such a cross sectional shape. A cylindrical body or a bottomed cylindrical body having a square cross section may be used.
[0035]
In addition, in the steel joint structures 10 and 20 of the above-described embodiments, the H-shaped steel has been described as an example of the steel frames 11 and 12, but the present invention is not limited to the H-shaped steel in this respect, Sectional steel such as I-shaped steel, groove-shaped steel, or angle-shaped steel having a bay-shaped depression can be used. Which of these shaped steels is used depends on the shape of the reinforced steel concrete structure. It is determined taking into account the design strength of the location where the steel is used.
[0036]
【The invention's effect】
As described above, according to the steel joint structure in the reinforced steel concrete structure of the present invention, the ends of two steel frames used as reinforcing materials in the reinforced steel concrete structure are abutted with each other, or one of the steel frames The bottom of the bottomed cylindrical body welded to the end is abutted, and only one steel end is surrounded by the bottomed cylindrical body, or both ends of the steel are surrounded by a cylindrical body open at both ends. In addition, since mortar or concrete is filled in and integrated, the ends of the two steel frames can be easily connected in a short time, and furthermore, it can be safely connected even at high places. Become.
[0037]
In addition, according to the steel joint structure in the reinforced steel concrete structure of the present invention, since the ends of two steel frames arranged on one axis are not directly connected as in the prior art, the two steel frames Even if the cross-sectional shapes of these are slightly different or slightly different in size, both steel frames can be joined together without reducing the connection strength.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing a steel joint structure in a reinforced steel concrete structure according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a steel joint structure in the reinforced steel concrete structure shown in FIG.
3 is a cross-sectional view showing the steel joint structure in the reinforced steel concrete structure shown in FIG. 2 cut along the line 3-3 in FIG. 2;
4 is an enlarged partial perspective view showing a part of a steel joint structure in the reinforced steel concrete structure shown in FIG. 1. FIG.
FIG. 5 is a perspective view schematically showing a steel joint structure in a reinforced steel concrete structure according to a second embodiment of the present invention.
6 is a longitudinal sectional view of a steel joint structure in the reinforced steel concrete structure shown in FIG.
7 is a transverse cross-sectional view showing the steel joint structure in the reinforced steel concrete structure shown in FIG. 6 cut along line 7-7 in FIG. 6;
FIG. 8 is a perspective view schematically showing a conventional steel joint structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Steel joint structure 11 in the reinforced steel concrete structure of 1st Embodiment Steel 11a Flange part 11b Hollow part 12 Steel frame 12a Flange part 12a Hollow part 13 Cylindrical body 14 Linear protrusion 15 Linear protrusion 16 Plate member 17 Line Shaped protrusion 18 Mortar or concrete 19 Arrow 20 in which mortar or concrete enters indented part Steel joint structure 21 in the reinforced steel concrete structure of the second embodiment Bottomed cylindrical body 22 Linear protrusion

Claims (3)

表面の少なくとも一部に多数の突起を形成した鉄骨を補強材として入れた鉄筋鉄骨コンクリート構造物において、一軸線上に配置された2つの前記鉄骨の一方の端部を有底筒状体の底部外面に堅固に固着し、他方の前記鉄骨の対向端部を前記有底筒状体の開口部から内部に入れて、2つの前記鉄骨を一軸線上に並べ、前記筒状体の内部にモルタル又はコンクリートを充填して構成され、前記筒状体の内面にも多数の突起が形成されていることを特徴とする鉄筋鉄骨コンクリート構造物における鉄骨継手構造。  In a reinforced steel concrete structure in which a steel frame in which a large number of protrusions are formed on at least a part of the surface is used as a reinforcing material, one end of the two steel frames arranged on one axis is connected to the bottom outer surface of the bottomed cylindrical body The opposite end of the other steel frame is inserted into the inside from the opening of the bottomed cylindrical body, the two steel frames are aligned on one axis, and mortar or concrete is placed inside the cylindrical body. A steel joint structure in a reinforced steel concrete structure, wherein a plurality of protrusions are formed on the inner surface of the cylindrical body. 前記鉄骨が、湾状の窪み部を有する断面形状のH形鋼、I形鋼、みぞ形鋼、又は山形鋼のいずれかの形鋼であり、前記筒状体内に充填された前記モルタル又はコンクリート中に埋没する前記形鋼の端部には、表面に多数の突起が付けられた板部材が断面で見て前記窪み部を閉鎖するような位置にあって前記鉄骨に固着されていることを特徴とする請求項に記載の鉄筋鉄骨コンクリート構造物における鉄骨継手構造。The mortar or concrete filled in the tubular body, wherein the steel frame is any one of H-shaped steel, I-shaped steel, groove-shaped steel, or angle-shaped steel having a cross-sectional shape having a bay-shaped depression. At the end of the section steel buried inside, a plate member with a large number of protrusions on the surface is positioned so as to close the depression when viewed in cross section and is fixed to the steel frame The steel joint structure in the reinforced steel concrete structure according to claim 1 , wherein 前記筒状体の断面形状が、四角形又は円形のいずれかであることを特徴とする請求項に記載の鉄筋鉄骨コンクリート構造物における鉄骨継手構造。The steel joint structure in a reinforced steel concrete structure according to claim 2 , wherein a cross-sectional shape of the cylindrical body is either a square or a circle.
JP2001273999A 2001-09-10 2001-09-10 Steel joint structures in reinforced steel concrete structures Expired - Fee Related JP4727091B2 (en)

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WO2023195292A1 (en) * 2022-04-08 2023-10-12 Jfeスチール株式会社 Steel frame member, joint structure, composite structure, and method for constructing composite structure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07158015A (en) * 1993-12-06 1995-06-20 Ohbayashi Corp Steel pipe lap joint structure of steel pipe/concrete composite structure columnar body

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07158015A (en) * 1993-12-06 1995-06-20 Ohbayashi Corp Steel pipe lap joint structure of steel pipe/concrete composite structure columnar body

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