JP5649766B2 - Joint structure of column and beam - Google Patents

Joint structure of column and beam Download PDF

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JP5649766B2
JP5649766B2 JP2007110329A JP2007110329A JP5649766B2 JP 5649766 B2 JP5649766 B2 JP 5649766B2 JP 2007110329 A JP2007110329 A JP 2007110329A JP 2007110329 A JP2007110329 A JP 2007110329A JP 5649766 B2 JP5649766 B2 JP 5649766B2
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steel pipe
bolt
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力 飯星
力 飯星
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旭化成ホームズ株式会社
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本発明は、鉄骨造ラーメン架構における柱と梁との接合部構造に関するものである。   The present invention relates to a joint structure between columns and beams in a steel frame frame.

鉄骨ラーメン構造の建築物において柱と梁とを高力ボルト等のボルトにて接合する場合、従来から柱側の梁との接合部(以下、「柱側の梁との接合部」を「梁接合部」とする)の肉厚を増すことによって梁接合部の剛性を高めることが一般的に行われてきた。例えば、特許文献1では、角形鋼管柱2の梁接合部に該角形鋼管柱2よりも厚肉の鋳鋼製の接合金物3を溶接によって取り付け、梁接合部の剛性を高める技術が開示されている。また、特許文献2では、鋼管柱11の長手方向の一部に誘導加熱および圧縮によって厚肉部11aを設けて、該厚肉部11aに梁を接合する技術が開示されている。   When connecting columns and beams with bolts such as high-strength bolts in steel-framed structures, the connection with the column-side beam (hereinafter referred to as “the connection with the column-side beam”) It has been common practice to increase the stiffness of a beam joint by increasing the thickness of the "joint". For example, Patent Document 1 discloses a technology for increasing the rigidity of a beam joint by attaching a metal fitting 3 made of cast steel thicker than the square steel pipe column 2 to the beam joint of the square steel tube column 2 by welding. . Patent Document 2 discloses a technique in which a thick portion 11a is provided on a part of the longitudinal direction of the steel pipe column 11 by induction heating and compression, and a beam is joined to the thick portion 11a.

一方、建物の高さ制限の厳しい地域に建てられることの多い戸建住宅において、高さ制限の範囲内で快適かつ有効な居住空間を構成する為の工夫として、特許文献3に示すように一部のグリッドにおいて中間階層の床レベルを変更し、階高の増した下層階をリビングルーム等のパブリックな空間として利用し、階高の減少した上部階を収納空間として利用することが提案されている。このような空間構成とすることによって、建物の高さを増すことなく天井が高く日照や採光も確保しやすい快適な空間を下層階に構成することができ、また、その上部の天井高が減少し居住に適さない空間も有効に活用することができる。   On the other hand, in a detached house that is often built in an area where the height of the building is severely limited, as disclosed in Patent Document 3, as a device for constructing a comfortable and effective living space within the range of the height restriction. It has been proposed to change the floor level of the middle floor in the grid of the part, use the lower floor with increased floor height as a public space such as a living room, and use the upper floor with reduced floor height as storage space Yes. By adopting such a space configuration, it is possible to configure a comfortable space on the lower floor with a high ceiling and easy to secure sunlight and lighting without increasing the height of the building, and the ceiling height of the upper part is reduced. The space that is not suitable for living can also be used effectively.

特開昭61−113941号公報JP 61-1113941 A 特開平7−292771号公報Japanese Patent Laid-Open No. 7-292771 特開平6−323010号公報JP-A-6-323010

しかしながら、特許文献1に開示された技術の場合、接合金物の溶接作業という工程が梁接合部の数だけ必要となり手間がかかりコストアップにつながるという問題があった。また、大きな曲げモーメントの作用する梁接合部近傍での溶接作業を伴うので、熱の影響による材質の劣化や溶接欠陥等の問題が生じないように全ての梁接合部について、細心の注意を払って品質管理を行う必要が生じていた。   However, in the case of the technique disclosed in Patent Document 1, there is a problem that a process of welding the joint metal is required for the number of beam joints, which is troublesome and leads to an increase in cost. In addition, since it involves welding work near the beam joint where a large bending moment acts, careful attention should be paid to all beam joints so as not to cause problems such as material deterioration and welding defects due to the effects of heat. It was necessary to conduct quality control.

また、特許文献2に開示された技術は、加熱装置9や圧縮装置4等を含む特殊かつ複雑な厚肉加工装置が必要であり高コストかつ簡易に行い得るものではない。また、厚肉部11aの肉厚を一定に保つように装置を制御することは実際には困難なことであった。更に、溶接の工程を省略することができるので溶接欠陥の問題は解消されるものの、鋼管を圧縮することにより肉厚を増す為、鋼管に内部歪が残留する。その為、後工程として熱処理を行い歪を除去する必要があった。   Further, the technique disclosed in Patent Document 2 requires a special and complicated thick wall processing apparatus including the heating device 9, the compression device 4, and the like, and cannot be easily performed at high cost. In addition, it is actually difficult to control the apparatus so that the thickness of the thick portion 11a is kept constant. Furthermore, although the welding process can be omitted, the problem of welding defects is solved, but the thickness increases by compressing the steel pipe, so that internal strain remains in the steel pipe. Therefore, it was necessary to remove the strain by performing a heat treatment as a subsequent process.

また、鉄骨ラーメン構造の建物において特許文献3に開示されたような空間構成とする為には、中間階層の一部の梁の接合レベルを変更する必要がある。この場合、上記特許文献1、2いずれの技術を利用したとしても、柱と梁との接合は特殊な加工のされた厚肉の梁接合部に限定される為、厚肉の梁接合部を夫々の梁接合レベル毎に設けなければならず更に手間とコストがかさむという問題があった。   Further, in order to obtain a space configuration as disclosed in Patent Document 3 in a steel frame structure building, it is necessary to change the joining level of some beams in the intermediate layer. In this case, even if any of the techniques of Patent Documents 1 and 2 is used, the connection between the column and the beam is limited to a thick beam joint that has been specially processed. There is a problem in that it has to be provided for each beam joint level, and further labor and cost are increased.

特に、柱や梁等の部材の断面寸法が規格化された工業化住宅においては、設定された梁レベルに応じて予め厚肉の接合部を複数形成しておく、或いは柱のバリエーションを複数用意しておく必要がある為、部材品種が膨大になるという問題があった。また、和室や浴室の床面と一般部の床面との段差を解消する為に一部床のレベルを50mmから100mm程度下げる場合、床を支持する梁のレベルを床下げのレベルに応じて下げる必要があるが、この場合、1本の柱に接合する複数の梁どうしが高さ方向にラップするような構成に対応させようとすると、厚肉の梁接合部のバリエーションも増加させざるを得なくなり更に複雑な部材構成とする必要があった。従って、工業化住宅のメリットのひとつである部材の規格化によるコスト削減効果が薄らいでしまうという問題があった。   In particular, in industrialized houses where the cross-sectional dimensions of members such as columns and beams are standardized, multiple thick-walled joints are formed in advance according to the set beam level, or multiple column variations are prepared. There is a problem that the number of member varieties becomes enormous. In addition, in order to eliminate the level difference between the floor surface of a Japanese-style room or bathroom and the floor surface of the general part, when the level of a part of the floor is lowered by about 50 mm to 100 mm, the level of the beam supporting the floor depends on the level of the floor lowering In this case, if you try to support a configuration in which multiple beams joined to a single column wrap in the height direction, the variation of thick-walled beam joints will also increase. It was not possible to obtain it, and it was necessary to use a more complicated member structure. Therefore, there has been a problem that the cost reduction effect due to the standardization of the members, which is one of the merits of the industrialized house, is diminished.

本発明は、従来技術の問題を解決し、鉄骨ラーメン構造における柱と梁との接合部を簡易かつ高い品質をもって構成することができ、更に、一部の梁の接合レベルの変更にも容易に対応することが可能な柱と梁との接合部構造を提供することを目的とする。   The present invention solves the problems of the prior art, and can easily and high-quality structures for the connection between columns and beams in a steel frame structure, and can easily change the connection level of some beams. An object of the present invention is to provide a joint structure between a column and a beam that can be used.

上記従来技術の課題を解決する為の本発明に係る柱と梁との接合部構造の第1の構成は、重層の鉄骨造ラーメン架構におけるボルト接合による柱と梁との接合部構造であって、前記柱は、少なくとも柱脚部から2階の梁接合部までの範囲、もしくは少なくとも連続する2つの階の梁接合部を含む範囲が、横断面内に溶接による継目が存在しない均一な肉厚を有する角形鋼管からなり、前記角形鋼管の肉厚は、地震力の作用によって前記梁の崩壊が始まる時点で前記ボルトの引抜力によって生ずる前記柱の面外変形が制限されるとともに前記ボルトの引抜力によって前記梁接合部から前記ボルトが抜けて接合が解除されることがないように設定されたことを特徴とする。 A first configuration of a column-to-beam joint structure according to the present invention for solving the above-described problems of the prior art is a column-to-beam joint structure by bolt joint in a multi-layer steel frame structure. , said post is at least columnar leg portion from the second floor ranging beam, or two floors beam the including range at least successive, uniform wall having no seam by welding to the transverse plane A square steel pipe having a thickness, and the thickness of the square steel pipe is limited to an out-of-plane deformation of the column caused by a pulling force of the bolt at the time when the beam starts to collapse due to the action of seismic force, and It is set so that the bolt is not pulled out from the beam joint by a pulling force and the joint is not released.

また、本発明に係る柱と梁との接合部構造の第2の構成は、前記鉄骨造ラーメン架構は工業化住宅に適用されるものであり、前記柱の均一な肉厚を有する角形鋼管からなる部分には、所定の層における梁接合部が高さ方向に予め複数形成され、前記角形鋼管の肉厚は前記複数の梁接合部のうち最も高い位置にある梁接合部に前記梁を接合した状態を想定して設定されており、前記複数の梁接合部の中から選択された梁接合部に梁を接合して構成されたことを特徴とする。 Moreover, the 2nd structure of the junction structure of the pillar and beam which concerns on this invention is the said steel-frame frame structure is applied to an industrialized house, and consists of a square steel pipe which has the uniform thickness of the said pillar. In the portion , a plurality of beam joint portions in a predetermined layer are formed in advance in the height direction, and the thickness of the rectangular steel pipe is joined to the beam joint portion at the highest position among the plurality of beam joint portions. It is set on the assumption of a state, and is formed by joining a beam to a beam joint selected from the plurality of beam joints.

本発明に係る柱と梁との接合部構造の第1の構成によれば、梁接合部において柱が角形鋼管で構成されその肉厚がボルトの引き抜き力に基づいて設定されているので、柱に対して特に高強度の接合金物を付加したり厚肉部を設けるなどといった補強を施すことなく、ボルト孔を穿つという簡易な作業で梁接合部を構成することができる。従って、梁接合部の加工工程を大幅に簡略化することができる。   According to the first configuration of the joint structure between the pillar and the beam according to the present invention, the pillar is composed of a square steel pipe at the beam joint and the thickness thereof is set based on the pulling force of the bolt. On the other hand, it is possible to configure the beam joint by a simple operation of drilling a bolt hole without adding a reinforcing member such as a high strength joint metal or providing a thick part. Therefore, the process of processing the beam joint can be greatly simplified.

また、梁接合部の加工工程において溶接等による部材の接合作業が不要であるので、接合の精度によって部材の寸法精度が低下する虞がなく、また、加熱による材質の劣化が生じないので強度面での信頼性が向上する。   In addition, since there is no need to join the members by welding or the like in the beam joint processing step, there is no risk that the dimensional accuracy of the members will be lowered due to the joining accuracy, and there will be no deterioration of the material due to heating, so strength Reliability is improved.

更に、均一な肉厚を有する角形鋼管の肉厚は、柱と梁との接合に使用される引張力が作用するボルトの引抜力に基づいて設定され、且つ同一断面部のどの位置においても均一であるので、均一な肉厚を有する角形鋼管の範囲内において任意の位置にボルト孔を穿つだけで梁接合部を構造上問題なく構成することができる。従って建物の階高の設定を従来技術のように手間やコストをかけることなく容易に行うことができる。   Furthermore, the thickness of a square steel pipe having a uniform thickness is set based on the pulling-out force of the bolt on which the tensile force used for joining the column and the beam acts, and is uniform at any position on the same cross-section. Therefore, the beam joint can be constructed without any structural problem by simply drilling the bolt holes at arbitrary positions within the range of the rectangular steel pipe having a uniform thickness. Therefore, the floor height of the building can be easily set without taking time and cost as in the prior art.

特に、本発明を工業化住宅等の部材が規格化された建物に適用した場合、ボルト孔を付加するだけで階高の設定を自由に行うことができるので、部材のバリエーションを増加させることなく単一品種の柱で多様な顧客のニーズへの対応力を高めることができる。   In particular, when the present invention is applied to a building in which a member such as an industrialized house is standardized, the floor height can be set freely only by adding a bolt hole, so that the number of members can be increased without increasing the number of members. It is possible to increase the ability to respond to the needs of various customers with a single type of pillar.

本発明に係る柱と梁との接合部構造の第2の構成によれば、柱の均一な肉厚を有する角形鋼管からなる部分には所定の階層における梁接合部が高さ方向に予め複数形成され、前記複数の梁接合部の中から選択された梁接合部に梁を接合するので、全く同一の柱を用いて梁の接合レベルの変更を容易に行うことができる。   According to the second configuration of the column-to-beam joint structure according to the present invention, a plurality of beam joints in a predetermined hierarchy are provided in advance in the height direction in a portion made of a square steel pipe having a uniform thickness of the column. Since the beam is joined to the beam joint selected from the plurality of beam joints, it is possible to easily change the joint level of the beam using exactly the same column.

また、新築時のみならず改築工事においても床レベルを変更するという一般的には大掛かりな工事が溶接等の部材加工が不要なので比較的容易に行うことができる。   Further, in general, a large-scale work of changing the floor level not only in a new construction but also in a renovation work can be performed relatively easily because no member processing such as welding is required.

以下に、本発明に係る柱と梁との接合部構造の最も好ましい形態について説明する。本発明は、重層の鉄骨造ラーメン架構のボルト接合による柱と梁との接合部構造において、特に柱を均一な肉厚を有する角形鋼管で構成することで構造安全性を確保しつつ合理的な構成を実現するものである。本発明が適用される鉄骨造ラーメン架構は、2階建て以上の重層の架構であればよく、階層に特に制限はない。   Below, the most preferable form of the junction structure of the pillar and beam which concerns on this invention is demonstrated. The present invention provides a structure in which a column and a beam are joined to each other by bolting of a multi-layered steel frame frame structure. In particular, the column is composed of a square steel pipe having a uniform wall thickness, while ensuring structural safety. The configuration is realized. The steel frame frame to which the present invention is applied is not particularly limited as long as it is a multi-layered structure of two or more stories.

本発明に使用する柱は、均一な肉厚を有する角形鋼管で構成された部分を有し、この角形鋼管で構成された部分に少なくとも1箇所の梁接合部を有するように構成されていればよい。この条件を除いて上記角形鋼管と他の角形鋼管との接合部の位置や接合数に制限はなく、構造物に作用する応力や柱の製作コスト等を考慮して適宜決定すればよい。   The column used in the present invention has a portion made of a square steel pipe having a uniform wall thickness, and if it is constituted to have at least one beam joint in the portion made of this square steel pipe. Good. Except for this condition, there is no limitation on the position and number of joints between the above-mentioned square steel pipe and other square steel pipes, and it may be appropriately determined in consideration of the stress acting on the structure, the manufacturing cost of the column, and the like.

均一な肉厚を有する角形鋼管とは、継目部と一般部で肉厚の違いが無く等厚であるということである。このような構成の角形鋼管としては、継目無、即ち横断面内に溶接による継目が存在しない角形鋼管(いわゆるシームレスパイプ)、溶接組み立て箱型断面柱、冷間成形角形鋼管、熱間成形角形鋼管などがあるが、製造の過程で溶接が不要のシームレスパイプが好ましい。   A square steel pipe having a uniform wall thickness means that there is no difference in wall thickness between the seam portion and the general portion, and the thickness is equal. As the square steel pipe having such a configuration, there is no seamless, that is, a square steel pipe (so-called seamless pipe) having no welded seam in the cross section, a welded box-shaped cross section column, a cold-formed square steel pipe, a hot-formed square steel pipe. However, a seamless pipe that does not require welding in the manufacturing process is preferable.

均一な肉厚を有する角形鋼管と他の略同一外形の角形鋼管とを接合して柱の断面を途中で変更する場合、その接合部(以下、角形鋼管どうしの接合部を「柱・柱接合部」とする)は溶接、ボルト接合いずれの方法によって接合されていてもよく、公知の技術を利用して構成することができる。尚、柱・柱接合部は、大きな応力の作用する梁接合部近傍は避けて作用する応力が小さく影響の少ない中間部分で接合するのが好ましい。   When a square steel pipe having a uniform wall thickness is joined to another square steel pipe of approximately the same external shape and the cross section of the column is changed halfway, the joint (hereinafter referred to as the joint between the square steel pipes is referred to as “column / column joint”). Part ”) may be joined by any method of welding and bolt joining, and can be constructed using a known technique. It should be noted that the column / column joint is preferably joined at an intermediate portion where the stress acting is small and the influence is small, avoiding the vicinity of the beam joint where a large stress acts.

柱と梁とを接合する引張力が作用するボルトの引抜力は、梁に作用する曲げモーメントにより生じるもので、梁接合部に面する柱フランジ面に面外変形を生じさせるものである。梁接合部の柱フランジ面に充分な強度と剛性がなければ柱が破壊したり、梁端部に回転が生じ建物の水平方向の変形が過大になるという問題が生じる。また、柱にネジを切ったボルト孔を穿ちボルトを螺合してボルト接合する場合、ボルトの引抜力に耐え得るボルト孔のネジ部の強度が求められ、充分な強度が確保されない場合は、ボルトが抜けて柱と梁との接合が解除され、床が落下して建物が倒壊に至る。また、ボルト孔にネジを切らずに公知のワンサイドボルトを用いてボルト接合する場合もボルト孔周辺の強度が確保されていない場合はボルトが抜けて柱と梁との接合が解除され建物が倒壊に至る。   The pull-out force of the bolt on which the tensile force for joining the column and the beam acts is generated by a bending moment acting on the beam, and causes out-of-plane deformation on the column flange surface facing the beam joint. If there is not enough strength and rigidity on the column flange surface of the beam joint, there will be a problem that the column will be broken, or the beam end will rotate and the horizontal deformation of the building will be excessive. In addition, when a bolt hole with a threaded hole is drilled and a bolt is screwed to join a bolt, the strength of the threaded portion of the bolt hole that can withstand the pulling force of the bolt is required, and when sufficient strength is not ensured, The bolts come off and the connection between the pillars and beams is released, the floor falls and the building collapses. In addition, when bolts are joined using known one-side bolts without cutting screws in the bolt holes, if the strength around the bolt holes is not secured, the bolts come off and the connection between the columns and beams is released and the building is removed. It leads to collapse.

一般に重層の門型ラーメン架構において地震力を想定した水平荷重を作用させた場合、各層とも梁端部(柱との接合部)に作用する曲げモーメントは、梁接合レベルが高いほど(柱脚部から接合部までの高さが大きくなるほど)大きい。従って、本発明に使用する柱の均一な肉厚を有する角形鋼管の肉厚は、想定される梁接合レベルの範囲内で梁端部に作用する応力が最も大きくなる場合、柱が変形・破断することなく構造安全性が確保されるように設定したものである。つまり、均一な肉厚を有する角形鋼管において想定される梁接合レベルのうちもっとも高いレベルにおいて、フランジ近傍の最も大きな引抜力が作用するボルト孔周囲において、柱が変形・破断することなく構造安全性が確保されるように設定したものである。   In general, when a horizontal load assuming seismic force is applied to a multi-story portal frame structure, the bending moment acting on the beam end (joint with the column) of each layer increases as the beam connection level increases (column base) The greater the height from the to the junction, the greater). Therefore, the thickness of the rectangular steel pipe having the uniform wall thickness of the column used in the present invention is such that the column is deformed / ruptured when the stress acting on the beam end is the largest within the range of the assumed beam joint level. It is set so that structural safety can be ensured without doing so. In other words, at the highest level of beam joints assumed for rectangular steel pipes with a uniform wall thickness, structural safety without deformation or fracture of the column around the bolt hole where the largest pulling force near the flange acts. Is set to be secured.

本発明に使用する梁は、H形鋼、溝形鋼、鋼管等ラーメン架構を成立させ得る強度を有するものであればよく、特に限定されるものではない。また、2階以上の柱だけでなく、1階の柱脚部に接続する基礎梁をボルト接合する事もできる。その場合、基礎梁の少なくとも柱に接合する端部は鉄骨製または鉄骨コンクリート製である事が望ましい。   The beam used in the present invention is not particularly limited as long as it has a strength capable of establishing a rigid frame structure such as H-shaped steel, groove-shaped steel, and steel pipe. Further, not only the pillars on the second floor or higher, but also the foundation beam connected to the column base on the first floor can be bolted. In that case, it is desirable that at least the end portion of the foundation beam to be joined to the column is made of steel or steel concrete.

本発明における柱と梁との接合部の形式は、ボルト接合によって剛接合を実現する形式、即ち柱と梁との間で曲げモーメントを伝達するように設計された形式であればいかなるものでもよく、特に限定されるものではない。例えば、梁の端部に柱との接合面を有する接合プレートを溶接等によって取り付け該接合プレートを柱側の梁との接合面に当接し高力ボルト等にてボルト接合する形式や、柱側の梁との接合面に一対のT字状断面の接合金物(所謂スプリットティー)を接合した上で該接合金物と梁の上下フランジの端部とを高力ボルト等によってボルト接合する形式などを適用することができる。   The form of the joint between the column and the beam in the present invention may be any form as long as it is a form that realizes a rigid joint by bolt joining, that is, a form designed to transmit a bending moment between the pillar and the beam. There is no particular limitation. For example, a joining plate having a joining surface with a column at the end of the beam is attached by welding or the like, and the joining plate is in contact with the joining surface with the beam on the column side and is bolted with a high-strength bolt or the like. After joining a pair of T-shaped cross-section joints (so-called split tees) to the joint surface with the beam, the joints and the ends of the upper and lower flanges of the beam are bolted with a high-strength bolt or the like. Can be applied.

本発明に使用するボルトは、柱の内面側にナットやネジ孔加工された補強板等の溶接が不要なワンサイドボルトが好ましい。ワンサイドボルトのうち柱の内面側にボルトを突出させ該突出部にバルジを形成して締結する形式は、柱の肉厚が増すほど隣接するボルト相互の干渉の問題が生じやすくなる。このような場合、柱のボルト孔にネジを切ってボルトを螺合する形式のボルトとすることが好ましい。また、締結トルク管理の容易なトルシア型ボルトであることが好ましい。このようなボルトとしては、実公平5−575号公報に開示された特殊高力ボルトがある。
(第1実施例)
The bolt used in the present invention is preferably a one-side bolt that does not require welding such as a nut or a screw plate processed on the inner surface side of the column. Among the one-side bolts, the type in which the bolt protrudes from the inner surface side of the column and a bulge is formed and fastened to the protruding portion is likely to cause a problem of interference between adjacent bolts as the thickness of the column increases. In such a case, it is preferable to use a bolt of a type in which a bolt is cut into a bolt hole of a pillar and screwed. Moreover, it is preferable that it is a Torcia type | mold bolt with easy fastening torque management. As such a bolt, there is a special high-strength bolt disclosed in Japanese Utility Model Publication No. 5-575.
(First embodiment)

次に、本発明の第1実施例を、図を用いて具体的に説明する。本実施例は、3階建て鉄骨ラーメン構造の工業化住宅における柱と梁との接合部構造の例である。図1は本実施例の架構の平面的グリッド構成を示す図である。図2は本実施例の架構の全体構成を示す図である。図3は本実施例に使用される柱と大梁との接合部を示す図である。図4は本実施例に使用される柱を示す図である。図5は同一の部材を使用して、階高(天井高)を変更した架構の側面図である。   Next, a first embodiment of the present invention will be specifically described with reference to the drawings. A present Example is an example of the junction part structure of a pillar and a beam in the industrialized house of a three-story steel frame ramen structure. FIG. 1 is a diagram showing a planar grid configuration of the frame of this embodiment. FIG. 2 is a diagram showing the overall structure of the frame of this embodiment. FIG. 3 is a view showing a joint portion between a pillar and a large beam used in this embodiment. FIG. 4 is a diagram showing pillars used in this embodiment. FIG. 5 is a side view of a frame in which the same member is used and the floor height (ceiling height) is changed.

図1、2に示すように、本実施例の住宅は、複数の平面グリッドからなる総3階の建物である。図2に示すように、基本架構は、1層から3層まで連続した通し柱形式の複数の柱1と、各階層において隣接する柱1どうしを連結する複数の大梁2とからなり、桁行き方向が3スパン、妻方向が2スパンで合計6つの平面グリッドにより構成され、格子状に連続した基礎3の上部に構築されている。なお、柱脚部は特開平01−203522号公報に開示された露出型固定柱脚工法にて基礎に接合されている。   As shown in FIGS. 1 and 2, the house of this embodiment is a three-story building composed of a plurality of planar grids. As shown in FIG. 2, the basic frame is composed of a plurality of columns 1 in the form of continuous columns from one layer to three layers and a plurality of large beams 2 connecting adjacent columns 1 in each layer, and the direction of the carry Is composed of 6 plane grids with 3 spans and 2 spans in the wife direction, and is constructed on the upper part of the foundation 3 that is continuous in a grid pattern. The column base is joined to the foundation by an exposed fixed column base method disclosed in Japanese Patent Laid-Open No. 01-203522.

この基本架構を構築したのち、相対する大梁2の間に小梁を適宜架け渡した上でALC(軽量気泡コンクリート)からなる床パネルを梁の上フランジに載置して床が構成され、外周部の大梁2にALCからなる壁パネルを取り付けることによって外壁が構成されて躯体が完成する。   After constructing this basic frame, the floor is constructed by placing a small beam between the opposing large beams 2 and placing a floor panel made of ALC (lightweight cellular concrete) on the upper flange of the beam. An outer wall is constructed by attaching a wall panel made of ALC to the large beam 2 of the part, and the housing is completed.

図3に示すように、柱1に接合される大梁2はH形鋼からなり、全ての階層における全ての大梁2は梁成が250mm、フランジの幅が125mm、フランジの厚みが9mm、ウェブの厚みが6mmに統一されている。大梁2の柱1との接合部は、大梁2の両端部に溶接された接合プレート2aによって構成され、接合プレート2aには、横方向には中心から左右対称に2列、縦方向には等間隔に4段、同一径の孔2bが計8箇所穿たれている。孔2bのうち上部2段と最下段の計6個の孔が柱1との接合に使用するボルト4を挿通する為の孔である。なお、下から2段目の孔2個は接合作業の際「シノ」を挿し込んで位置合わせを行う為の孔であり、柱と梁との接合には使用しない。上記構成は寸法も含め全ての階層の全ての大梁2に共通している。   As shown in FIG. 3, the girder 2 joined to the column 1 is made of H-shaped steel, and all the girder 2 in all the layers are 250 mm in beam formation, 125 mm in flange width, 9 mm in flange thickness, 9 mm in web The thickness is unified to 6 mm. The joint portion of the beam 2 with the column 1 is constituted by a joint plate 2a welded to both ends of the beam 2. The joint plate 2a has two rows symmetrically from the center in the horizontal direction and the like in the vertical direction. A total of eight holes 2b having the same diameter and four steps are formed at intervals. A total of six holes in the upper 2 tiers and the lowermost tier of the holes 2 b are holes for inserting bolts 4 used for joining to the pillar 1. Note that the two holes in the second step from the bottom are holes for inserting and aligning “shino” in the joining operation, and are not used for joining the column and the beam. The said structure is common to all the big beams 2 of all the hierarchy including a dimension.

図4に示すように、柱1は、外形寸法が150mm角の角形鋼管からなる通し柱となっており、柱脚プレート1aの接合部から中途部分に形成された柱・柱接合部1bまでの部分(下部柱1cとする)は22mm肉厚を有する継目無の角形鋼管(即ち横断面内に溶接による継目が存在しないシームレスパイプ)で長さ方向について接合部を有することなく構成され、これより上部(上部柱1dとする)は外形寸法は下部柱1cと同一ではあるが下部柱1cよりも薄い4.5mm乃至6.0mmの肉厚を有する角形鋼管で構成されている。   As shown in FIG. 4, the column 1 is a through column made of a square steel pipe having an outer dimension of 150 mm square, and is a portion from the junction of the column base plate 1 a to the column / column junction 1 b formed in the middle portion. (The lower column 1c) is a seamless square steel pipe having a thickness of 22 mm (that is, a seamless pipe having no welded seam in the cross section), and is configured without a joint in the length direction. (The upper column 1d) is formed of a square steel pipe having the same outer dimensions as the lower column 1c but a thickness of 4.5 mm to 6.0 mm thinner than the lower column 1c.

柱1は、各階層の標準的な階高(大梁上端面間の離間寸法)が2870mmとなるように大梁2の基準接合レベルが設定されており、柱1の全ての面には各階大梁2の基準接合レベルに合わせて、大梁2の接合プレート2aの孔2bに対応するようにネジが切られた孔1hが穿たれて大梁2との接合部(第1の梁接合部)1e1、1f1、1g1が形成されている。大梁2の孔2bと同様に、上部2段と最下段の計6個の孔1hが、大梁2と接合するボルト4を螺入する孔であり、下から2段目の孔2個は位置合わせ用の孔である。   The column 1 has a standard joint level of the large beam 2 so that the standard floor height (space between the upper end surfaces of the large beams) of each layer is 2870 mm. In accordance with the reference joining level, a hole 1h that is threaded so as to correspond to the hole 2b of the joining plate 2a of the large beam 2 is drilled, and the joint portions (first beam joint portions) 1e1, 1f1 with the large beam 2 are formed. 1g1 is formed. Like the holes 2b of the large beam 2, a total of six holes 1h in the upper two steps and the lowermost step are holes into which the bolts 4 to be joined to the large beam 2 are screwed, and the two holes in the second step from the bottom are positions. It is a hole for alignment.

更に、2階の基準接合レベル(第1の梁接合部1e1)から下方向1000mmの位置と上方向1000mmの位置には、第1の梁接合部1e1と同様の構成で第2の梁接合部1e2と第3の梁接合部1e3が形成されている。また、3階においても同様に基準接合レベル(第1の梁接合部1f1)から下方向1000mmと上方向1000mmの位置には、第1の梁接合部1f1と同様の構成で第2の梁接合部1f2と第3の梁接合部1f3が形成されている。   Further, the second beam joint portion is configured in the same manner as the first beam joint portion 1e1 at a position 1000 mm downward and a position 1000 mm upward from the reference joint level (first beam joint portion 1e1) on the second floor. 1e2 and a third beam joint 1e3 are formed. Similarly, on the third floor, the second beam joint is configured in the same manner as the first beam joint 1f1 at positions 1000 mm downward and 1000 mm above the reference joint level (first beam joint 1f1). A portion 1f2 and a third beam joint portion 1f3 are formed.

柱・柱接合部1bは、特開平6−180026号公報や特開平8−60740号公報等に記載された公知の接合部構造によって3階大梁の第3の梁接合部1f3の上方に形成されている。   The column / column joint 1b is formed above the third beam joint 1f3 of the third-floor large beam by a known joint structure described in JP-A-6-180026, JP-A-8-60740, and the like. ing.

下部柱1cを構成する角形鋼管の肉厚は、前述したように大梁2の端部に最も大きな曲げモーメントが作用し、ボルトに最も大きな引抜力(高力ボルト1本当たり245kN)が作用する接合レベルにおいて下記手順により構造安全性の確認がなされている。   As described above, the thickness of the square steel pipe constituting the lower column 1c is such that the largest bending moment acts on the end of the large beam 2 and the largest pulling force (245 kN per high-strength bolt) acts on the bolt. At the level, structural safety is confirmed by the following procedure.

(1) 所定の材料強度と断面寸法を有する大梁2に対して保有耐力接合(柱との接合部の崩壊が大梁の崩壊に先行しないような接合)を満足するボルト4の引抜力を求める。(即ち、梁の崩壊がはじまる時点での、最も大きな引抜力の作用する上端および下端のボルト4の引抜力を求める。)
(2) 求めたボルト4の引抜力に基づいて柱の断面を仮定する。
(1) The pulling-out force of the bolt 4 satisfying the retained strength joint (joint so that the collapse of the joint with the column does not precede the collapse of the large beam) is obtained for the large beam 2 having a predetermined material strength and cross-sectional dimension. (That is, the pull-out force of the upper and lower bolts 4 at which the largest pull-out force acts when the beam starts to collapse is obtained.)
(2) A cross section of the column is assumed based on the obtained pulling force of the bolt 4.

(3) 3階大梁接合部の第3の梁接合部1f3に3階大梁2を接合した状態を想定して応力を計算し、部材応力が許容値以下であることを確認する。 (3) Stress is calculated on the assumption that the third-floor beam 2 is joined to the third beam joint 1f3 of the third-floor beam joint, and it is confirmed that the member stress is less than the allowable value.

大梁2と柱1とは、図3に示すように、実公平5−575号公報に開示されたボルト(特殊高力ボルト)4によりボルト接合されている。   As shown in FIG. 3, the girder 2 and the column 1 are joined by bolts (special high strength bolts) 4 disclosed in Japanese Utility Model Publication No. 5-575.

大梁2は、基本的に第1の梁接合部1e1、1f1、1g1を使用して柱1に接合され基準接合レベルに設定されているが、躯体を構成するグリッドのうち図1において斜線で示したグリッドG1については1階の階高を大きくとる為に2階レベルにおいて第3の梁接合部1e3を用いて大梁2を接合し接合レベルを基準接合レベルよりも上げている。   The main beam 2 is basically joined to the column 1 using the first beam joints 1e1, 1f1, and 1g1, and is set at the reference joint level. The grid shown in FIG. For the grid G1, the large beam 2 is joined using the third beam joint 1e3 at the second floor level to increase the floor height of the first floor, and the joint level is raised from the reference joint level.

また、基準階高のグリッドGと階高を変更したグリッドG1との境界部については、図示しないALCパネルからなる床を適宜小梁を架設した上で夫々のレベルに合わせて構成する。このため、夫々の接合レベルに大梁2が接合されており、第1の梁接合部1e1を使用して接合された大梁2と第3の梁接合部1e3を使用して接合された大梁2とが並存するように構成されている。   In addition, the boundary between the grid G1 having the reference floor height and the grid G1 in which the floor height has been changed is configured in accordance with each level by appropriately installing a floor made of an ALC panel (not shown). Therefore, the girder 2 is joined to each joining level, the girder 2 joined using the first beam joining part 1e1 and the girder 2 joined using the third beam joining part 1e3. Are arranged side by side.

このように構成することによって1階の階高(天井高)を部分的に高くとることができ、1階の窓をより高い位置に配置することも可能となり、採光が確保しにくい1階部分を明るく開放的な空間とすることができる。また、階高の低くなった2階部分は収納空間として活用することで室内空間を無駄なく活用することができる。   By configuring in this way, the floor height (ceiling height) of the first floor can be partially increased, the first floor window can be arranged at a higher position, and it is difficult to ensure lighting. Can be a bright and open space. Further, the interior space can be utilized without waste by utilizing the second floor portion having a lower floor height as a storage space.

上記実施例では1階の階高(天井高)を部分的に高くしたが、同一の部材を用いて、図5(a)に示すように、2階大梁2を第2の梁接合部1e2を用いて接合することにより部分的に2階の階高を大きくとることも可能である。この場合、2階の階高を大きくとった領域をリビングルームとして、階高の小さくなった1階部分を大きな階高を必要としないピロティー車庫や収納空間として利用することで、室内空間を無駄なく活用することができる。   In the above embodiment, the floor height (ceiling height) of the first floor is partially increased. However, as shown in FIG. 5A, the second-floor beam 2 is connected to the second beam joint 1e2 by using the same member. It is also possible to increase the floor height of the second floor partly by joining using the. In this case, the space on the second floor is used as a living room, and the first floor with a lower floor is used as a piloty garage or storage space that does not require a large floor. It can be used without any problems.

また、図5(b)に示すように、3階大梁2の接合を第2の梁接合部1f2を用いることにより、3階大梁2の接合レベルを下げ、3階の階高を大きくとることや、図5(c)に示すように、3階大梁2の接合を第3の梁接合部1f3を用いることにより3階大梁2の接合レベルを上げ、2階の階高を大きくとることも可能である。   Further, as shown in FIG. 5 (b), by using the second beam joint portion 1f2 to join the third-floor girder 2, the joining level of the third-floor girder 2 is lowered and the third-floor height is increased. Alternatively, as shown in FIG. 5 (c), the third-floor beam 2 can be joined by using the third beam joint portion 1f3 to increase the joint level of the third-floor beam 2 and increase the second-floor height. Is possible.

上記実施例は一部グリッドの大梁2の接合レベルを変更した例であるが、全てのグリッドについて大梁2の接合レベルを変更することも無論可能である。   Although the said Example is an example which changed the joining level of the big beam 2 of a part grid, it cannot be overemphasized to change the joining level of the big beam 2 about all the grids.

上述の如く、所定の層における梁接合部1e、1fが高さ方向に予め複数形成され、複数の梁接合部1e1〜1f3の中から選択された梁接合部に大梁2をボルト4にて接合する。   As described above, a plurality of beam joints 1e and 1f in a predetermined layer are formed in advance in the height direction, and the large beam 2 is joined with the bolt 4 to the beam joint selected from the plurality of beam joints 1e1 to 1f3. To do.

これにより、全く同一の柱1を用いて梁の接合レベルの変更を容易に行うことができる。また、設定される大梁2の接合レベルに応じて特殊な加工を施したり特殊な部材を付加することなく、同一の部材構成で容易に階高を変更することができ、建物の階高の設定を従来技術のように手間やコストをかけることなく容易に行うことができる。また、構造安全性が確保された柱と梁との接合部構造とすることができる。また、ボルト孔1hを付加するだけで階高の設定を自由に行うことができるので、部材のバリエーションを増加させることなく単一品種の柱で多様な顧客のニーズへの対応力を高めることができる。   As a result, it is possible to easily change the beam joining level using the same column 1. In addition, the floor height can be easily changed with the same member configuration without applying special processing or adding special members according to the set level of the beam 2 to be set. Can be easily performed without the effort and cost as in the prior art. Moreover, it can be set as the junction part structure of the pillar and beam in which structural safety was ensured. In addition, the floor height can be set freely simply by adding the bolt hole 1h, so it is possible to increase the ability to respond to the needs of various customers with a single type of pillar without increasing the number of members. it can.

また、柱1に対して特に高強度の接合金物を付加したり厚肉部を設けるなどといった補強を施すことなく、ボルト孔1hを穿つという簡易な作業で梁接合部1e、1fを構成することができるので、梁接合部1e、1fの加工工程を大幅に簡略化することができる。   In addition, the beam joints 1e and 1f can be formed by a simple operation of drilling the bolt holes 1h without reinforcing the pillar 1 by adding a particularly high-strength joint metal or providing a thick part. Therefore, the processing steps for the beam joints 1e and 1f can be greatly simplified.

また、梁接合部1e、1fの加工工程において溶接等による部材の接合作業が不要であるので、接合の精度によって部材の寸法精度が低下する虞がなく、また、加熱による材質の劣化や溶接欠陥等が生じないので強度面での信頼性が向上する。   In addition, since it is not necessary to join the members by welding or the like in the processing steps of the beam joint portions 1e and 1f, there is no possibility that the dimensional accuracy of the members may be lowered due to the joining accuracy, and deterioration of the material or welding defects due to heating. Therefore, the reliability in terms of strength is improved.

また、新築時のみならず改築工事においても床レベルを変更するという一般的には大掛かりな工事が溶接等の部材加工が不要なので比較的容易に行うことができる。   Further, in general, a large-scale work of changing the floor level not only in a new construction but also in a renovation work can be performed relatively easily because no member processing such as welding is required.

また、柱1に均一な肉厚を有する角形鋼管を用いたことにより、特殊かつ複雑な厚肉加工を行う必要がなく、コストを押えることができるとともに、肉厚を増す際に発生する内部歪が発生することもない。
(第2実施例)
In addition, the use of a square steel pipe having a uniform thickness for the column 1 eliminates the need for special and complex thick wall processing, which can hold down costs and increase the internal strain that occurs when the wall thickness is increased. Does not occur.
(Second embodiment)

次に第2実施例について図6を用いて説明する。第1実施例では、柱1側の各層の梁接合部1e、1fは離隔した位置に設定されてひとつの梁接合部につき8個の孔1hが形成されていたが、孔1hの径は同一であるので、図6に示すように、孔1hを縦方向について等間隔で5段以上連続して形成する。そして、複数の孔1hから使用する孔1hを選択することで、大梁2の接合レベルを縦方向の孔1hのピッチの整数倍のピッチで変更することができる。従って、大梁2の接合レベルをより細かく設定すると共に、同一の柱1に接合される大梁2どうしの接合レベルを微妙にずらすことが可能となる。例えば、孔1hの縦方向のピッチを50mmに設定しておき、60mm程度の厚みを有する畳敷きの床の領域において大梁2の接合レベルを1ピッチ分下方にずらすことにより床レベルを50mm下げることができ、畳よりも薄い層構成の洋室の床と段差なく仕上げることが容易に行える。
(その他の実施例)
Next, a second embodiment will be described with reference to FIG. In the first embodiment, the beam joints 1e and 1f of the respective layers on the column 1 side are set apart from each other to form eight holes 1h per beam joint, but the diameters of the holes 1h are the same. Therefore, as shown in FIG. 6, the holes 1h are continuously formed in the vertical direction at five or more steps at equal intervals. Then, by selecting the hole 1h to be used from the plurality of holes 1h, the joining level of the large beam 2 can be changed at a pitch that is an integral multiple of the pitch of the holes 1h in the vertical direction. Therefore, it is possible to set the joining level of the large beams 2 more finely and to slightly shift the joining level between the large beams 2 joined to the same column 1. For example, the vertical pitch of the holes 1h is set to 50 mm, and the floor level is lowered by 50 mm by shifting the joining level of the large beam 2 downward by one pitch in the area of the tatami mat floor having a thickness of about 60 mm. It can be easily finished without a step difference from the floor of a Western-style room that is thinner than a tatami mat.
(Other examples)

第1実施例と同じ3層の工業化住宅における他の実施例として図7(a)〜図7(g)に示すような柱の構成とすることができる。図7において斜線で示した部分が同一断面で継目無の角形鋼管であり、斜線で示していない部分が通常の柱であり、三角で示した位置がこの2つの柱を接合する柱・柱接合部1bである。   As another embodiment in the same three-layer industrialized house as the first embodiment, it is possible to adopt a column structure as shown in FIGS. 7 (a) to 7 (g). In FIG. 7, the hatched portion is a seamless square steel pipe with the same cross section, the portion not shaded is a normal column, and the position indicated by a triangle is a column / column joint that joins these two columns. Part 1b.

図7(a)は3層分の柱の全長にわたって同一断面で継目無の角形鋼管とした例である。この場合、第1実施例に比して更に自由度の高い架構とすることができる。   FIG. 7A shows an example of a seamless square steel pipe having the same cross section over the entire length of three columns of columns. In this case, the frame can have a higher degree of freedom than the first embodiment.

図7(b)は第1層部分に柱・柱接合部1bを設けて柱・柱接合部1bより上部を同一断面で継目無の角形鋼管とした例である。   FIG. 7B is an example in which a column / column joint 1b is provided in the first layer portion, and the upper part from the column / column joint 1b is a seamless square steel pipe having the same cross section.

図7(c)は、第2層部分に柱・柱接合部1bを設けて柱・柱接合部1bより上部を同一断面で継目無の角形鋼管とした例である。   FIG. 7C is an example in which a column / column junction 1b is provided in the second layer portion, and the upper part of the column / column junction 1b is a seamless square steel pipe with the same cross section.

図7(d)は第2層部分に柱・柱接合部1bを設けて柱・柱接合部1bより下部を同一断面で継目無の角形鋼管とした例である。   FIG. 7D shows an example in which a column / column junction 1b is provided in the second layer portion, and the lower part of the column / column junction 1b is a seamless square steel pipe having the same cross section.

図7(e)は第1層部分と2層部分に柱・柱接合部1bを設けて中間部を同一断面で継目無の角形鋼管とした例である。   FIG. 7E shows an example in which a column / column joint 1b is provided in the first layer portion and the second layer portion, and the intermediate portion is formed into a seamless square steel pipe with the same cross section.

図7(f)は第2層部分と3層部分に柱・柱接合部1bを設けて中間部を同一断面で継目無の角形鋼管とした例である。   FIG. 7F shows an example in which a column / column joint 1b is provided in the second layer portion and the third layer portion, and the intermediate portion is formed into a seamless square steel pipe with the same cross section.

図7(g)は第1層部分と3層部分に柱・柱接合部1bを設けて中間部を同一断面で継目無の角形鋼管とした例である。   FIG. 7G shows an example in which a column / column joint 1b is provided in the first layer portion and the third layer portion, and the intermediate portion is a seamless square steel pipe having the same cross section.

図7(a)〜図7(g)に示す柱の構成は、設定された接合レベル数の違いはあるものの、いずれの場合であっても第1実施例と同様の作用・効果が発揮される。   Although the column configurations shown in FIGS. 7A to 7G are different in the set number of joining levels, the same operations and effects as the first embodiment are exhibited in any case. The

本発明は、鉄骨造建物に限らず、柱と梁とをボルトにて剛接合する鋼構造物全般に広く適用することができる。   The present invention is not limited to steel buildings, and can be widely applied to all steel structures in which columns and beams are rigidly connected with bolts.

第1実施例にかかる架構の平面的グリッド構成を示す図である。It is a figure which shows the planar grid structure of the frame concerning 1st Example. 第1実施例の架構の全体構成を示す図である。It is a figure which shows the whole structure of the frame of 1st Example. 第1実施例に使用される大梁と柱の柱と梁との接合部を示す図である。It is a figure which shows the junction part of the large beam used for 1st Example, the pillar of a pillar, and a beam. 第1実施例に使用される柱を示す図である。It is a figure which shows the pillar used for 1st Example. 第1実施例にかかる階高(天井高)変更した架構の側面図である。It is a side view of the frame which changed the floor height (ceiling height) concerning the 1st example. 第2実施例にかかる柱と梁との柱と梁との接合部の構成図である。It is a block diagram of the junction part of the pillar and beam concerning 2nd Example. その他の実施例にかかる架構の構成を示す部分断面図である。It is a fragmentary sectional view showing the composition of the frame concerning other examples.

G、G1 …グリッド
1…柱
1a…柱脚プレート
1b…柱・柱接合部
1c…下部柱
1d…上部柱
1e…2階大梁接合部
1e1…第1の梁接合部
1e2…第2の梁接合部
1e3…第3の梁接合部
1f…3階大梁接合部
1f1…第1の梁接合部
1f2…第2の梁接合部
1f3…第3の梁接合部
1g…R階大梁接合部
1h…孔
2…大梁
2a…接合プレート
2b…孔
3…基礎
4…ボルト
G, G1 ... Grid 1 ... Column 1a ... Column base plate 1b ... Column / column junction 1c ... Lower column 1d ... Upper column 1e ... Second floor large beam junction 1e1 ... First beam junction 1e2 ... Second beam junction Part 1e3 ... third beam joint 1f ... third-floor large beam joint 1f1 ... first beam joint 1f2 ... second beam joint 1f3 ... third beam joint 1g ... R-floor large beam joint 1h ... hole 2 ... Large beam 2a ... Joining plate 2b ... Hole 3 ... Foundation 4 ... Bolt

Claims (2)

  1. 重層の鉄骨造ラーメン架構におけるボルト接合による柱と梁との接合部構造であって、
    前記柱は、少なくとも柱脚部から2階の梁接合部までの範囲、もしくは少なくとも連続する2つの階の梁接合部を含む範囲が、横断面内に溶接による継目が存在しない均一な肉厚を有する角形鋼管からなり、
    前記角形鋼管の肉厚は、地震力の作用によって前記梁の崩壊が始まる時点で前記ボルトの引抜力によって生ずる前記柱の面外変形が制限されるとともに前記ボルトの引抜力によって前記梁接合部から前記ボルトが抜けて接合が解除されることがないように設定されたことを特徴とする柱と梁との接合部構造。
    It is a joint structure of columns and beams by bolt connection in a multi-layer steel frame frame,
    It said post is at least columnar leg portion from the second floor ranging Beam or two floors Beam the including range at least contiguous, uniform wall thickness seam by welding does not exist in the cross-section A square steel pipe having
    The thickness of the square steel pipe is such that the deformation of the column caused by the pull-out force of the bolt is limited when the beam starts to collapse due to the action of seismic force, and the bolt joint pulls the beam from the beam joint. A joint structure between a column and a beam, which is set so that the bolt does not come off and the joint is not released.
  2. 前記鉄骨造ラーメン架構は工業化住宅に適用されるものであり、前記柱の均一な肉厚を有する角形鋼管からなる部分には、所定の層における梁接合部が高さ方向に予め複数形成され、前記角形鋼管の肉厚は前記複数の梁接合部のうち最も高いレベルにある梁接合部に前記梁を接合した状態を想定して、設定されており、前記複数の梁接合部の中から選択された梁接合部に梁を接合して構成されたことを特徴とする請求項1に記載した柱と梁との接合部構造。   The steel frame frame is applied to an industrialized house, and a plurality of beam joints in a predetermined layer are formed in advance in a height direction in a portion made of a square steel pipe having a uniform thickness of the column, The thickness of the square steel pipe is set assuming that the beam is joined to the beam joint at the highest level among the plurality of beam joints, and is selected from the plurality of beam joints The column-to-beam joint structure according to claim 1, wherein the beam is joined to the beam joint.
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