JP2010285819A - Ring steel for building structure - Google Patents

Ring steel for building structure Download PDF

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JP2010285819A
JP2010285819A JP2009141243A JP2009141243A JP2010285819A JP 2010285819 A JP2010285819 A JP 2010285819A JP 2009141243 A JP2009141243 A JP 2009141243A JP 2009141243 A JP2009141243 A JP 2009141243A JP 2010285819 A JP2010285819 A JP 2010285819A
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welding
ring
steel material
ring steel
welded
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JP5474411B2 (en
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Tetsuya Sugano
哲也 菅野
Takeshi Hagino
毅 萩野
Asuka Hodaka
明日香 穂高
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Asahi Kasei Construction Materials Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide ring steel for a building structure, which can achieve a weight reduction while maintaining a welding strength. <P>SOLUTION: The ring steel 1 for the building structure includes a welding storage part 20 and welding holes 1c. The welding storage part 20 is formed between the inner peripheral part 1a and the outer peripheral part 1b as a groove which has a concave cross section and is shaped like a ring. The welding holes 1c are formed on the undersurface 20a of the welding storage part 20 at regular spacings. As a result of the formation of the ring-shaped welding storage part 20, ring-shaped flanges 21, 22 are formed between the welding storage part 20 and the inner peripheral part 1a and between the welding storage part 20 and the outer peripheral part 1b respectively from the outward appearances of the ring steel 1. Then the circumference of the excess metal part B of a welded part 3 which has been plug-welded in the welding hole 1c reaches the undersurface 20a of the welding storage part 20. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は、鉄骨梁に形成されて配管などを通すために設けられたウエブ貫通孔を補強するために利用される建築構造用リング鋼材に関するものである。   The present invention relates to a ring steel material for a building structure that is used to reinforce a web through hole that is formed in a steel beam and is provided to allow piping and the like to pass therethrough.

従来、このような分野の技術として、特開２００７−１２００１６号公報がある。この公報に記載された鉄骨梁補強金物（建築構造用リング鋼材）は、中心孔を有するリング状に形成され、中心孔の径は、鉄骨梁のウエブ貫通孔と一致させた大きさを有している。さらに、補強金物には、ボルトを貫通させるための挿通孔が形成されている。このような補強金物は、ボルトとナットにより鉄骨梁に固定されているが、挿通孔が多くなればなる程、ボルトやナットの数も増えて部品点数が多くなり、作業性が悪くなると同時に、手締めの場合には、ナットの締め付けトルクのバラツキも大きくなる。
そこで、図８に示すように、ボルトやナットを使わずに、溶接によって鉄骨梁に接合させることができる補強金物１００が知られている。このような補強金物１００にあっては、溶接器具が必要にはなるが、作業性の向上に寄与している。 Conventionally, there is JP, 2007-120016, A as a technique of such a field. The steel beam reinforcing hardware (ring steel for building structure) described in this publication is formed in a ring shape having a center hole, and the diameter of the center hole has a size matched with the web through hole of the steel beam. ing. Furthermore, an insertion hole for penetrating the bolt is formed in the reinforcing hardware. Such reinforcement hardware is fixed to the steel beam with bolts and nuts, but as the number of insertion holes increases, the number of bolts and nuts increases, the number of parts increases, and workability deteriorates. In the case of manual tightening, the variation in the tightening torque of the nut also increases.
Therefore, as shown in FIG. 8, there is known a reinforcing hardware 100 that can be joined to a steel beam by welding without using bolts or nuts. In such a reinforcing hardware 100, although a welding tool is required, it contributes to the improvement of workability.

特開２００７−１２００１６号公報JP 2007-120016 A

しかしながら、前述した従来の鉄骨梁補強金物（建築構造用リング鋼材）１００は、図８に示すように、均一な肉厚のリング状本体部１０１に単に溶接孔１０２が形成されているだけなので、軽量化のために本体部１０１の肉厚を薄くすると、溶接孔１０２が、溶接強度を保つのに必要な深さを維持できず、また、溶接孔１０２の深さを深くすると本体部１００が厚くなってしまうので、重量増加を招来するといった問題点がある。   However, since the conventional steel beam reinforcing hardware (ring steel material for building structure) 100 described above is simply formed with a weld hole 102 in a ring-shaped main body portion 101 having a uniform thickness as shown in FIG. If the thickness of the main body portion 101 is reduced for weight reduction, the welding hole 102 cannot maintain the depth necessary for maintaining the welding strength, and if the depth of the welding hole 102 is increased, the main body portion 100 is Since it will become thick, there exists a problem of causing the weight increase.

本発明は、溶接強度を維持しつつ、軽量化を図るようにした建築構造用リング鋼材を提供することを目的とする。   An object of the present invention is to provide a ring steel material for a building structure that is reduced in weight while maintaining welding strength.

本発明は、内周部と外周部とでリング状に形成された建築構造用リング鋼材において、
内周部と外周部との間で断面凹状で且つリング状の溝として形成された溶接収容部と、
溶接収容部の底面に形成された溶接孔と、を備え、
溶接孔内でプラグ溶接された溶接部の余盛部の周囲が、溶接収容部の底面に達するように溶接されることを特徴とする。 The present invention is a ring steel material for a building structure formed in a ring shape with an inner periphery and an outer periphery,
A weld accommodating portion formed as a ring-shaped groove having a concave cross section between the inner peripheral portion and the outer peripheral portion;
A welding hole formed in the bottom surface of the welding housing portion,
It is characterized in that welding is performed so that the periphery of the welded portion of the welded portion that is plug-welded in the weld hole reaches the bottom surface of the weld receiving portion.

本発明に係る建築構造用リング鋼材においては、溶接に寄与する溶接収容部と溶接孔とが形成され、溶接収容部は、断面凹状でリング状の溝として、内周部と外周部との間に形成され、溶接孔は、溶接収容部の底面に所定の個数が形成されている。このように内周部と外周部との間で断面凹状で且つリング状の溝として溶接収容部が形成される結果として、リング鋼材の外観上、溶接収容部と内周部との間、溶接収容部と外周部との間にリング状のフランジ部が形成されることになり、リング鋼材で例えフランジ部間の厚みが薄くても、フランジ部によって、内周部近傍と外周部近傍で十分な強度が確保されて、補強材として機能し得るので、リング鋼材の剛性が確保されることになる。更には、鉄骨梁に形成されて配管などを通すために設けられたウエブ貫通孔が高い場所にある場合、リング鋼材を高い場所まで運ばなくてはならず、リング鋼材の重さが作業負担に多大な影響を与えるので、溶接収容部を深くすることで、リング鋼材の剛性を必要以上に落とすことなく、軽量化を容易に図ることができ、これに伴って取り扱い性も向上する。しかも、高所作業にあっては、足場が限定されることもあるので、溶接状態の確認を容易にする必要がある。そこで、本発明のリング鋼材にあっては、溶接孔で余盛された溶接部の周囲は、溶接収容部の底面に達しているが、リング状の溶接収容部を採用することで、溶接収容部内に点在する溶接部分の良否が確認し易くなり、さらには、余盛高さの確認をも容易になる。しかも、溶接孔全体の孔径を大きくすることなく、溶接時に溶接孔を狙い易く、溶接欠陥の発生を確実に防止することができる。   In the ring steel material for building structures according to the present invention, a weld receiving portion and a weld hole that contribute to welding are formed, and the weld receiving portion is a concave groove with a ring shape between the inner peripheral portion and the outer peripheral portion. A predetermined number of welding holes are formed on the bottom surface of the welding accommodating portion. In this way, as a result of forming the weld housing part as a ring-shaped groove having a concave cross section between the inner peripheral part and the outer peripheral part, welding is performed between the weld housing part and the inner peripheral part on the appearance of the ring steel material. A ring-shaped flange part will be formed between the housing part and the outer peripheral part, and even if the thickness between the flange parts is thin with ring steel, the flange part is sufficient in the vicinity of the inner peripheral part and the outer peripheral part. Since sufficient strength is ensured and it can function as a reinforcing material, the rigidity of the ring steel material is ensured. Furthermore, when the web through-hole formed in the steel beam and through which piping is passed is in a high place, the ring steel must be transported to a high place, and the weight of the ring steel is a burden on the work. Since a great influence is exerted, it is possible to easily reduce the weight of the ring steel material without reducing the rigidity of the ring steel material more than necessary by deepening the weld housing portion, and the handleability is improved accordingly. In addition, in high-altitude work, the scaffold may be limited, so it is necessary to make it easy to check the welding state. Therefore, in the ring steel material according to the present invention, the periphery of the welded portion that has been built up with the weld hole reaches the bottom surface of the welded housing portion. It becomes easy to confirm the quality of the welded portions scattered in the part, and further, it is also easy to confirm the surplus height. Moreover, without increasing the diameter of the entire weld hole, it is easy to aim at the weld hole during welding, and the occurrence of welding defects can be reliably prevented.

また、内周部から外周部に渡って延在する溶接部が設けられていると好適である。
このような構成のリング鋼材の製造は、先ず、帯状の鋼材をドラムに巻き付けて、螺旋状の鋼材とした後、径方向で外周から内周に向かって切断してＣ形の鋼材を製作して、この両端を突き合わせて溶接する。このような製造は、リング鋼材の大量生産を可能にしている。 Moreover, it is suitable when the welding part extended over an outer peripheral part from an inner peripheral part is provided.
In manufacturing the ring steel material having such a configuration, first, a belt-shaped steel material is wound around a drum to form a spiral steel material, and then a C-shaped steel material is manufactured by cutting from the outer periphery to the inner periphery in the radial direction. Then, these two ends are butted and welded. Such manufacturing enables mass production of ring steel.

本発明によれば、溶接強度を維持しつつ、軽量化を図ることができる。   According to the present invention, it is possible to reduce the weight while maintaining the welding strength.

（ａ）は、本発明に係る建築構造用リング鋼材を梁に溶接する前の状態を示す斜視図、（ｂ）は、建築構造用リング鋼材を梁に溶接した後の状態を示す斜視図である。(A) is a perspective view which shows the state before welding the ring steel material for building structures which concerns on this invention to a beam, (b) is a perspective view which shows the state after welding the ring steel material for building structures to a beam. is there. 本発明に係る建築構造用リング鋼材の一実施形態を示す斜視図である。It is a perspective view which shows one Embodiment of the ring steel material for building structures which concerns on this invention. 図２のIII−III線に沿う断面図である。It is sectional drawing which follows the III-III line of FIG. （ａ）は、正常な溶接状態を示す斜視図、（ｂ）は、溶接不良の状態を示す斜視図である。(A) is a perspective view which shows a normal welding state, (b) is a perspective view which shows the state of poor welding. （ａ）は、本発明に係る建築構造用リング鋼材の製造に適用される帯状鋼材を示す斜視図、（ｂ）は、ドラムに鋼材が巻かれた状態を示す図である。(A) is a perspective view which shows the strip | belt-shaped steel materials applied to manufacture of the ring steel materials for building structures based on this invention, (b) is a figure which shows the state by which the steel materials were wound around the drum. （ｃ）は、螺旋状の鋼材を示す斜視図、（ｄ）は、円弧状鋼材を示す平面図、（ｅ）は、円環状鋼材を示す平面図である。(C) is a perspective view showing a spiral steel material, (d) is a plan view showing an arcuate steel material, and (e) is a plan view showing an annular steel material. 本発明に係る建築構造用リング鋼材の他の実施形態を示す断面図である。It is sectional drawing which shows other embodiment of the ring steel material for building structures which concerns on this invention. 従来の建築構造用リング鋼材を示す斜視図である。It is a perspective view which shows the conventional ring steel material for building structures.

以下、図面を参照しつつ本発明に係る建築構造用リング鋼材の好適な実施形態について詳細に説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a ring steel material for building structures according to the present invention will be described in detail with reference to the drawings.

図１に示すように、建築構造用リング鋼材１は、鉄骨Ｈ形鋼梁Ａに形成されて配管などを通すために設けられたウエブ貫通孔２を補強するためのものであり、ウエブ貫通孔２と略同径の内周部１ａと、所定の外径を有する外周部１ｂと、内周部１ａと外周部１ｂとの間で等間隔に複数個（例えば、４〜１２個）配置された溶接孔１ｃとからなる。   As shown in FIG. 1, a ring steel material 1 for a building structure is used to reinforce a web through hole 2 formed in a steel H-shaped steel beam A and provided for passing piping or the like. 2 (for example, 4 to 12 pieces) are arranged at equal intervals between the inner peripheral portion 1a having substantially the same diameter as the outer peripheral portion 2, the outer peripheral portion 1b having a predetermined outer diameter, and the inner peripheral portion 1a and the outer peripheral portion 1b. Welding hole 1c.

梁Ａにリング鋼材１を固定する手順としては、梁Ａのウエブ貫通孔２とリング鋼材１の内周部１ａとを位置合わせした後、溶接孔１ｃにプラグ溶接３を施工して、ウエブの一面側でリング鋼材１と梁Ａとを接合する。さらに、梁Ａのウエブの反対側でも他のリング鋼材１をプラグ溶接する。このようなリング鋼材１を利用すると、リング鋼材１の外周部１ｂに溶接を施工する必要がなく、溶接量が少ないので、梁Ａが熱の影響（歪み、縮み）をほとんど受けることがない。   As a procedure for fixing the ring steel material 1 to the beam A, after aligning the web through hole 2 of the beam A and the inner peripheral portion 1a of the ring steel material 1, plug welding 3 is applied to the welding hole 1c, and the web The ring steel material 1 and the beam A are joined on one side. Further, another ring steel material 1 is also plug welded on the opposite side of the web of the beam A. When such a ring steel material 1 is used, it is not necessary to perform welding on the outer peripheral portion 1b of the ring steel material 1, and the amount of welding is small, so that the beam A is hardly affected by heat (distortion, shrinkage).

リング鋼材１の一例は、外径が５００〜１０００ｍｍ、内径が３４０〜７００ｍｍ、厚みが１６〜２５ｍｍの形状である。また、溶接孔１ｃの直径は、２３〜３９ｍｍである。   An example of the ring steel material 1 has a shape with an outer diameter of 500 to 1000 mm, an inner diameter of 340 to 700 mm, and a thickness of 16 to 25 mm. The diameter of the weld hole 1c is 23 to 39 mm.

このリング鋼材１について更に詳細に説明する。   The ring steel material 1 will be described in more detail.

図２及び図３に示すように、リング鋼材１は、内周部１ａと外周部１ｂとの間で断面凹状で且つリング状の溝として形成された溶接収容部２０と、溶接収容部２０の底面２０ａで等間隔に形成された溶接孔１ｃと、を備え、リング状の溶接収容部２０が形成される結果として、リング鋼材の外観上、溶接収容部２０と内周部１ａとの間、溶接収容部２０と外周部１ｂとの間にリング状のフランジ部２１，２２が形成されることになる。そして、溶接孔１ｃ内でプラグ溶接された溶接部３の余盛部Ｂの周囲は、溶接収容部２０の底面２０ａに達している。   As shown in FIGS. 2 and 3, the ring steel material 1 includes a weld housing portion 20 formed as a ring-shaped groove having a concave cross section between the inner peripheral portion 1 a and the outer peripheral portion 1 b, and Welding holes 1c formed at equal intervals on the bottom surface 20a, and as a result of forming the ring-shaped weld housing portion 20, on the appearance of the ring steel material, between the weld housing portion 20 and the inner peripheral portion 1a, Ring-shaped flange portions 21 and 22 are formed between the weld housing portion 20 and the outer peripheral portion 1b. And the circumference | surroundings of the surplus part B of the welding part 3 plug-welded in the welding hole 1c have reached the bottom face 20a of the welding accommodating part 20. FIG.

リング鋼材１においては、溶接に寄与する溶接収容部２０と溶接孔１ｃとが形成されているので、接収容部２０と内周部１ａとの間、溶接収容部２０と外周部１ｂとの間にリング状のフランジ部２１，２２によって、リング鋼材１で例えフランジ部２１，２２間の底部２３の厚みが薄くても、フランジ部２１，２２によって、内周部１ａ近傍と外周部１ｂ近傍で十分な強度が確保されて、補強材として機能し得るので、リング鋼材１の剛性が確保されることになる。   In the ring steel material 1, since the weld housing portion 20 and the weld hole 1 c that contribute to welding are formed, the space between the contact housing portion 20 and the inner peripheral portion 1 a and between the weld housing portion 20 and the outer peripheral portion 1 b. Even if the thickness of the bottom 23 between the flange portions 21 and 22 is thin in the ring steel material 1 due to the ring-shaped flange portions 21 and 22, the flange portions 21 and 22 cause the inner periphery 1 a and the outer periphery 1 b to be close. Sufficient strength is ensured and it can function as a reinforcing material, so that the rigidity of the ring steel material 1 is ensured.

更には、鉄骨梁Ａのウエブ貫通孔２が高い場所にある場合、リング鋼材１を高い場所まで運ばなくてはならず、リング鋼材の重さが作業負担に多大な影響を与えるので、溶接収容部２０を深くすることで、リング鋼材１の剛性を必要以上に落とすことなく、軽量化を容易に図ることができ、これに伴って取り扱い性も向上する。   Furthermore, when the web through hole 2 of the steel beam A is in a high place, the ring steel material 1 must be transported to a high place, and the weight of the ring steel material has a great influence on the work load. By deepening the portion 20, it is possible to easily reduce the weight without reducing the rigidity of the ring steel material 1 more than necessary, and the handleability is improved accordingly.

しかも、高所作業にあっては、足場が限定されることもあるので、溶接状態の確認を容易にする必要がある。そこで、リング鋼材１にあっては、余盛部Ｂの周囲は、溶接収容部２０の底面２０ａに達しているが、リング状の溶接収容部２０を採用することで、溶接収容部２０内に点在する溶接部３の良否が確認し易くなり、さらには、余盛高さの確認をも容易になる。しかも、溶接孔１ｃ全体の孔径を大きくすることなく、溶接時に溶接孔１ｃを狙い易く、溶接欠陥の発生を確実に防止することができる。   In addition, in high-altitude work, the scaffold may be limited, so it is necessary to make it easy to check the welding state. Therefore, in the ring steel material 1, the periphery of the surplus portion B reaches the bottom surface 20 a of the weld housing portion 20, but by adopting the ring-shaped weld housing portion 20, It is easy to check the quality of the scattered welded portions 3, and it is also easy to check the surplus height. In addition, without increasing the diameter of the entire weld hole 1c, it is easy to aim at the weld hole 1c during welding, and the occurrence of welding defects can be reliably prevented.

例えば、図４（ａ）に示すように、溶接孔１ｃは、余盛部Ｂによって見えなくなるようなプラグ溶接が行われることが肝要であるが、図４（ｂ）に示すように、プラグ溶接の不備によって、溶接孔１ｃの一部Ｋが余盛部Ｂから露出するような場合でも、溶接収容部２０がリング状である故に、目視によって確認し易く、このことは、溶接状態の検査を良好にしている。   For example, as shown in FIG. 4 (a), it is important that the welding hole 1c be plug welded so as not to be seen by the extra portion B, but as shown in FIG. 4 (b), plug welding is performed. Even if a part K of the weld hole 1c is exposed from the surplus portion B due to the deficiencies in the welded portion, it is easy to check visually because the weld receiving portion 20 is ring-shaped. Good.

さらに、内周部１ａから外周部１ｂに渡って延在する溶接部Ｐを有するリング鋼材１にあっては、後述する製造方法が適用され、大量生産を可能にしている。   Furthermore, in the ring steel material 1 having the welded portion P extending from the inner peripheral portion 1a to the outer peripheral portion 1b, a manufacturing method described later is applied to enable mass production.

次に、リング鋼材１の製造方法について詳述する。   Next, the manufacturing method of the ring steel material 1 will be described in detail.

図５に示すように、Ｃ≦０．２０％、Ｓｉ≦０．５５％、Ｍｎ≦１．６０％、Ｐ≦０．０３５％、Ｓ≦０．０３５％以下の化学成分である炭素鋼で、機械的性質が降伏点≧３２０Ｍｐａ、４９０Ｍｐａ≦引張強さ≦６１０Ｍｐａ、降伏比≦８０％、破断伸び≧１７％からなる長尺状の帯状鋼材１０を準備する。   As shown in FIG. 5, carbon steel is a chemical component of C ≦ 0.20%, Si ≦ 0.55%, Mn ≦ 1.60%, P ≦ 0.035%, S ≦ 0.035% or less. A long strip steel material 10 having mechanical properties of yield point ≧ 320 Mpa, 490 Mpa ≦ tensile strength ≦ 610 Mpa, yield ratio ≦ 80%, elongation at break ≧ 17% is prepared.

その後、細長い帯状の鋼材１０は、円筒状のドラム１１に１周ごとに厚み分をずらしながら巻き付けられ、螺旋状に冷間曲げ加工がなされる。図６に示すように、巻き加工が終了した螺旋状の鋼材１２は、ドラム１１から取り外された後に、外周と内周との間を、径方向に外周から内周に向かって一点鎖線に沿って切断され、Ｃ形の円弧状鋼材１３となる。このような成形によれば、Ｃ形の円弧状鋼材１３を効率よく成形することができる。   Thereafter, the elongated strip-shaped steel material 10 is wound around the cylindrical drum 11 while shifting the thickness by one round, and is subjected to a cold bending process in a spiral shape. As shown in FIG. 6, the spiral steel material 12 that has been wound is removed from the drum 11, and then, between the outer periphery and the inner periphery, along the one-dot chain line in the radial direction from the outer periphery to the inner periphery. To be C-shaped arc-shaped steel material 13. According to such molding, the C-shaped arc-shaped steel material 13 can be efficiently molded.

巻き成形前の帯状の鋼材１０における溶接収容部１５の底面１５ａは、鋼材１０の内周部１ａ側に位置するフランジ部２１から外周部１ｂ側に位置するフランジ部２２に架けて上昇するような傾斜面として形成されている。これは、鋼材１０がドラム１１に巻き付けられる際に、鋼材１０が内周側に向かって圧縮されることを考慮し、Ｃ形の円弧状鋼材１３の底部１３ｃ（図６（ｄ）参照）の厚みを均一にするためのものである。   The bottom surface 15a of the welding accommodating portion 15 in the strip-shaped steel material 10 before the winding is formed so as to rise from the flange portion 21 positioned on the inner peripheral portion 1a side of the steel material 10 to the flange portion 22 positioned on the outer peripheral portion 1b side. It is formed as an inclined surface. This is because the steel material 10 is compressed toward the inner peripheral side when the steel material 10 is wound around the drum 11, and the bottom portion 13 c of the C-shaped arc-shaped steel material 13 (see FIG. 6D). This is to make the thickness uniform.

その後、Ｃ形の円弧状鋼材１３の切断部分Ｓの両端面１３ａを突き合わせて溶接し、閉鎖断面をなす円環状の鋼材１４が成形される。突き合わせ溶接の方法は、両端面１３ａを強固に接合できる方法であればいかなる方法でも良いが、フラッシュバット溶接が適切である。この溶接によれば、Ｃ形の円弧状鋼材１３の両端面１３ａを突き合わせのために滑らかに仕上げておくことを要しないので、溶接工程を簡素化することができる。なお、符号「Ｐ」は、溶接部である。   Thereafter, both end surfaces 13a of the cut portion S of the C-shaped arc-shaped steel material 13 are butted and welded to form an annular steel material 14 having a closed cross section. The butt welding method may be any method as long as both end surfaces 13a can be firmly joined, but flash butt welding is appropriate. According to this welding, it is not necessary to finish the both end faces 13a of the C-shaped arc-shaped steel material 13 smoothly for abutting, so that the welding process can be simplified. The symbol “P” is a welded portion.

さらに、円環状に成形された鋼材１４は、７４０℃〜９００℃の熱処理を行い、建築構造用の材料として使用可能な所定の品質特性を有するリング鋼材２０となる。そして、このリング鋼材２０にドリル加工を行って、溶接孔１ｃ（図２参照）を成形したものが、製品としてのリング鋼材１になる。   Further, the steel material 14 formed into an annular shape is subjected to a heat treatment at 740 ° C. to 900 ° C., and becomes a ring steel material 20 having predetermined quality characteristics that can be used as a material for building structures. A ring steel material 1 as a product is formed by drilling the ring steel material 20 to form a weld hole 1c (see FIG. 2).

本発明は、前述した実施形態に限定されないことは言うまでもない。例えば、図７に示すように、リング鋼材３０のフランジ部３１，３２が断面台形であってもよく、また、断面半円状であってもよい。これらの形状によって、溶接収容部２０が外方に向かって広がるようになるので、溶接部３の目視確認がより良好になる。   It goes without saying that the present invention is not limited to the embodiment described above. For example, as shown in FIG. 7, the flange portions 31 and 32 of the ring steel material 30 may be trapezoidal in cross section or semicircular in cross section. Because of these shapes, the weld housing part 20 spreads outward, so that the visual confirmation of the welded part 3 becomes better.

１，３０…建築構造用リング鋼材、１ａ…内周部、１ｂ…外周部、１ｃ…溶接孔、２０…溶接収容部、２０ａ…底面、２１，２２，３１，３２…フランジ部、Ｐ…溶接部。   DESCRIPTION OF SYMBOLS 1,30 ... Ring steel material for building structures, 1a ... Inner peripheral part, 1b ... Outer peripheral part, 1c ... Weld hole, 20 ... Weld accommodating part, 20a ... Bottom, 21, 22, 31, 32 ... Flange part, P ... Welding Department.

Claims (2)

内周部と外周部とでリング状に形成された建築構造用リング鋼材において、
前記内周部と前記外周部との間で断面凹状で且つリング状の溝として形成された溶接収容部と、
前記溶接収容部の底面に形成された溶接孔と、を備え、
前記溶接孔内でプラグ溶接された溶接部の余盛部の周囲が、前記溶接収容部の前記底面に達するように溶接されることを特徴とする建築構造用リング鋼材。 In the ring steel material for building structures formed in a ring shape at the inner periphery and the outer periphery,
A weld receiving portion formed as a ring-shaped groove having a concave cross section between the inner peripheral portion and the outer peripheral portion;
A welding hole formed in the bottom surface of the welding housing portion,
A ring steel material for a building structure, wherein a periphery of a surging portion of a welded portion plug-welded in the weld hole is welded so as to reach the bottom surface of the weld receiving portion. 前記内周部から前記外周部に渡って延在する溶接部が設けられていることを特徴とする請求項１記載の建築構造用リング鋼材。   The ring steel material for building structures according to claim 1, wherein a welded portion extending from the inner peripheral portion to the outer peripheral portion is provided.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012197661A (en) * 2011-03-09 2012-10-18 Koryo Kaihatsu Kk Reinforcement metal plate and reinforcement structure for steel frame beam using the same
KR20220084650A (en) * 2020-12-14 2022-06-21 주식회사 포스코 Reinforcing structure of beam and reinforcing method of beam

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JPS6116893Y2 (en) * 1982-02-17 1986-05-24
JP2001018065A (en) * 1999-07-05 2001-01-23 Kawasaki Steel Corp Butt welding of inclined steel tubes
JP2006183444A (en) * 2004-03-22 2006-07-13 Ishihara:Kk Method of reinforcing opening of steel frame girder
JP2006342604A (en) * 2005-06-09 2006-12-21 Okabe Co Ltd Through-hole reinforcing structure of steel beam and through-hole reinforcing tool used therefor

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JPS6116893Y2 (en) * 1982-02-17 1986-05-24
JP2001018065A (en) * 1999-07-05 2001-01-23 Kawasaki Steel Corp Butt welding of inclined steel tubes
JP2006183444A (en) * 2004-03-22 2006-07-13 Ishihara:Kk Method of reinforcing opening of steel frame girder
JP2006342604A (en) * 2005-06-09 2006-12-21 Okabe Co Ltd Through-hole reinforcing structure of steel beam and through-hole reinforcing tool used therefor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012197661A (en) * 2011-03-09 2012-10-18 Koryo Kaihatsu Kk Reinforcement metal plate and reinforcement structure for steel frame beam using the same
KR20220084650A (en) * 2020-12-14 2022-06-21 주식회사 포스코 Reinforcing structure of beam and reinforcing method of beam
KR102505657B1 (en) * 2020-12-14 2023-03-06 주식회사 포스코 Reinforcing structure of beam and reinforcing method of beam

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