JP6179757B2 - Column-to-column connection structure for different diameter column connections in buildings - Google Patents

Column-to-column connection structure for different diameter column connections in buildings Download PDF

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JP6179757B2
JP6179757B2 JP2013066598A JP2013066598A JP6179757B2 JP 6179757 B2 JP6179757 B2 JP 6179757B2 JP 2013066598 A JP2013066598 A JP 2013066598A JP 2013066598 A JP2013066598 A JP 2013066598A JP 6179757 B2 JP6179757 B2 JP 6179757B2
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洋介 川端
洋介 川端
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Nippon Steel Metal Products Co Ltd
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この発明は、建築物における下階柱の上端部に溶接接合される柱梁接合部コアの上端部に、前記下階柱より小径の上階柱を溶接接合する建築物の異径柱接合用柱梁接合構造に関する。   The present invention is for joining different-diameter columns of a building in which an upper column having a diameter smaller than that of the lower column is welded to the upper end of a column beam joint core welded to the upper end of the lower column of the building. It relates to the beam-column joint structure.

柱に角形鋼管を用い、梁にH形鋼を用いる建築物における柱梁接合部として、一般に、通しダイアフラム形式、内ダイアフラム形式、外ダイアフラム形式などが採用されている。
通しダイアフラム形式の柱梁接合構造は、柱梁接合部とされる短尺角形鋼管の上下端に、柱を貫通して短尺角形鋼管の周囲外側に張り出したダイアフラムを溶接固定した構造であり、前記ダイアフラムにH形鋼梁のフランジが溶接接合される。
Generally, a through-diaphragm type, an inner diaphragm type, an outer diaphragm type, and the like are adopted as a column-beam joint in a building using a square steel pipe as a column and an H-shaped steel as a beam.
The through-diaphragm-type column beam connection structure is a structure in which a diaphragm extending through the column and projecting to the outer periphery of the short rectangular steel pipe is welded and fixed to the upper and lower ends of the short rectangular steel pipe that is the column beam connection portion. The flange of the H-shaped steel beam is welded.

また、ダイアフラムを設けずに短尺の厚肉角形鋼管からなる柱梁接合部コアを用いてその管壁面にH形鋼梁を直接溶接可能にしたノンダイアフラム形式の柱梁接合構造も採用されている(特許文献1〜3)。
この種の柱梁接合部コアとして、例えば図9に示すように、2つの熱間圧延溝形鋼を対向させフランジ先端部どうしを突合せ溶接して角形断面にする溝形鋼二丁合わせ溶接方式の柱梁接合部コア1がある。図で上下2辺の外側の突起は突合せ溶接部の余盛りを示す。なお、突起状の余盛りは、必要であれば切削又は研削して削除する。
In addition, a non-diaphragm-type column beam connection structure is adopted in which a H-beam is directly welded to the pipe wall surface using a column beam connection core made of a short thick square steel pipe without a diaphragm. (Patent Documents 1 to 3).
As this type of column beam joint core, for example, as shown in FIG. 9, two hot rolled grooved steels face each other and the flange end parts are butt welded to form a square cross section. There is a column beam joint core 1. In the figure, the protrusions on the outer sides of the upper and lower sides indicate the surplus of the butt weld. Note that the protrusion-like surplus is removed by cutting or grinding if necessary.

角形鋼管柱を用いた中低層鉄骨造建物の実施設計では、上下階で柱の幅を変化させることがしばしば行われる。上下階で柱径が変化する柱梁接合構造、すなわち異径柱接合用柱梁接合構造としては、従来、いずれも通しダイアフラム形式である厚肉プレート形式やテーパ管形式が多く採用されている。
一方、前記ノンダイアフラム形式の柱梁接合部コアは、図12に示した特殊な形状のもの(特許文献4)を除き、異径柱接合用柱梁接合構造に適用することは考えられていなかった。
In the practical design of medium- and low-rise steel frame buildings using square steel pipe columns, it is often performed to change the width of the columns on the upper and lower floors. Conventionally, as a column beam connection structure in which the column diameter changes between the upper and lower floors, that is, a column beam connection structure for different diameter column connection, a thick plate type and a taper tube type, which are all through diaphragm type, have been conventionally employed.
On the other hand, the non-diaphragm type column beam joint core is not considered to be applied to the column beam joint structure for different diameter column joints except for the special shape shown in FIG. 12 (Patent Document 4). It was.

図10に通しダイアフラム形式の柱梁接合構造を異径柱接合用柱梁接合構造として用いた前記厚肉プレート形式の異径柱接合用柱梁接合構造8を示す。
厚肉プレート形式は、上下の柱2、3を繋ぐ短尺角形鋼管5の上側のダイアフラム6として、外周が短尺角形鋼管5よりも周囲に張り出すサイズの厚肉プレート6を用いる形式である。7は下側のダイアフラムを示す。この厚肉プレート6を介して短尺角形鋼管5の上方に上階鋼管柱2の下端を接合し、前記厚肉プレート6にH形鋼梁4のフランジ4aを溶接接合し、ウエブ4bを短尺角形鋼管5の側面に溶接接合する。上階柱2にかかる軸力および曲げモーメントは、厚肉プレート6を介して短尺角形鋼管5に伝達される(『鋼構造接合部設計指針:日本建築学会(2012.3)』)。
FIG. 10 shows the columnar beam joint structure 8 for connecting different-diameter columns using the thick-walled plate type, in which the diaphragm-type column-beam joint structure is used as the column-beam joint structure for different-diameter column joints.
The thick plate type is a type in which a thick plate 6 having a size that the outer periphery projects beyond the short square steel pipe 5 as the diaphragm 6 on the upper side of the short square steel pipe 5 connecting the upper and lower columns 2 and 3 is used. Reference numeral 7 denotes a lower diaphragm. Through this thick plate 6, the lower end of the upper steel pipe column 2 is joined above the short square steel pipe 5, the flange 4 a of the H-shaped steel beam 4 is welded to the thick plate 6, and the web 4 b is joined to the short square steel pipe. The steel pipe 5 is welded to the side surface. The axial force and bending moment applied to the upper column 2 are transmitted to the short rectangular steel pipe 5 through the thick plate 6 (“Design Guidelines for Steel Structure Joints: Architectural Institute of Japan (2012.3)”).

図11に前記テーパ管形式の異径柱接合用柱梁接合構造10を示す。
テーパ管形式は、下端の断面形状が下階鋼管柱3の断面形状に合致し、上端の断面形状が上側鋼管柱2の断面形状に合致する短尺のテーパ管(テーパ角形鋼管)11を用いる形式である。テーパ管11は、台形のプレートを4枚溶接して製作するか、テーパ管の展開図を2分割した形状の2枚の板をそれぞれコ字形に折り曲げ加工し対向させ溶接接合して製作する。このテーパ管11を準備しておき、外周が下階鋼管柱3よりも周囲に張り出す下側ダイアフラム13を介して、下階鋼管柱3の上端にテーパ管11の下端を接合する。また、外周が上階鋼管柱2よりも周囲に張り出す上側ダイアフラム12を介して、テーパ管11の上端に上階鋼管柱2の下端を接合し、上下のダイアフラム12、13及びテーパ管11の側面にH形鋼梁4のフランジ4a及びウエブ4bを接合する。上階鋼管柱2にかかる軸力および曲げモーメントは、テーパ管11を介して下階鋼管柱3に伝達される(前記『鋼構造接合部設計指針』)。
FIG. 11 shows the columnar beam joint structure 10 for jointing different diameter columns in the tapered tube form.
The tapered pipe form uses a short taper pipe (tapered square steel pipe) 11 in which the cross-sectional shape at the lower end matches the cross-sectional shape of the lower steel pipe column 3 and the cross-sectional shape at the upper end matches the cross-sectional shape of the upper steel pipe column 2. It is. The taper tube 11 is manufactured by welding four trapezoidal plates, or by bending two sheets of a shape obtained by dividing the development view of the taper tube into two U-shaped plates, facing each other, and welding them together. The taper tube 11 is prepared, and the lower end of the taper tube 11 is joined to the upper end of the lower steel pipe column 3 via the lower diaphragm 13 whose outer periphery projects beyond the lower steel tube column 3. Further, the upper end of the upper steel pipe column 2 is joined to the upper end of the taper pipe 11 via the upper diaphragm 12 whose outer periphery extends beyond the upper floor steel pipe column 2, and the upper and lower diaphragms 12, 13 and the taper pipe 11 are connected. The flange 4a and the web 4b of the H-shaped steel beam 4 are joined to the side surfaces. The axial force and bending moment applied to the upper steel pipe column 2 are transmitted to the lower steel pipe column 3 through the taper pipe 11 (the “steel structure joint design guideline”).

特許文献1〜3には、ダイアフラム形式とは異なり、柱梁接合部をダイアフラムで補強せずに、短尺の厚肉角形鋼管からなるノンダイアフラム形式の柱梁接合部コアを用いる技術が記載されている。ダイアフラムを用いないことで、部材数低減および溶接に関する施工の手間が大幅に削減できる。   Patent Documents 1 to 3 describe a technique that uses a non-diaphragm-type column beam joint core made of a short thick-walled square steel pipe without reinforcing the column beam joint with a diaphragm, unlike the diaphragm type. Yes. By not using a diaphragm, the number of members can be reduced and the labor for construction related to welding can be greatly reduced.

図12に前述した特殊な形状として異径柱接合用柱梁接合構造に採用可能にしたノンダイアフラム形式の柱梁接合部コア16による異径柱接合用柱梁接合構造15を示す(特許文献4)。
前記柱梁接合部コア16は、短尺の角形断面管の上端部に、柱の軸方向に対して40〜50度の傾斜角度を有して、角形断面管の内部に向かって徐々に肉薄になるように形成された補強部18(18a、18b)を有する特殊な形状の柱梁接合部コア(柱梁接合金物)である。この柱梁接合部コア16は、鋳造成型や高周波加熱による断面増厚法で前記補強部を成型している。
FIG. 12 shows a column beam connection structure 15 for different diameter column connection using a non-diaphragm type column beam connection core 16 that can be adopted in the column beam connection structure for different diameter column connection as a special shape described above (Patent Document 4). ).
The column beam joint core 16 has an inclination angle of 40 to 50 degrees with respect to the axial direction of the column at the upper end portion of the short rectangular tube, and gradually becomes thinner toward the inside of the rectangular tube. It is a column-beam joint core (column-beam joint hardware) having a special shape and having reinforcing portions 18 (18a, 18b) formed as described above. The column beam joint core 16 is formed with the reinforcing portion by a cross-section thickening method by casting or high-frequency heating.

特開2009−287221JP 2009-287221 A 特開2010−13811JP 2010-13811 A 特開2010−236206JP 2010-236206 A 特開2001−329614JP 2001-329614 A

前記厚肉プレート形式の異径柱接合用柱梁接合構造8には以下の問題がある。
上下の鋼管柱の柱幅差は、鋼管構造設計指針に記載される設計に基づく場合、耐力及び剛性を確保するために厚肉プレートの厚みが例えば40mmを超える厚みになる場合がある。厚みが40mmを超える厚肉プレートは、一般的な建築資材としては市販されておらず、特注品の扱いとなるため、コスト高になる。また、厚肉プレート6の厚みが40mmを超える場合、厚肉プレートの設計基準強度を低減しなければならない(建築基準法に基づく告示による)。また、ノンダイアフラム形式の柱梁接合部コアに比べ部材数が多く、梁が接合されるダイアフラム6、7が短尺角形鋼管5よりも周囲に張り出す形状となっているため梁4の部材加工も複雑で、溶接の手間もかかるという問題もある。
The thick plate type column-to-column connection structure 8 for different diameter columns has the following problems.
When the column width difference between the upper and lower steel pipe columns is based on the design described in the steel pipe structure design guideline, the thickness of the thick plate may exceed, for example, 40 mm in order to ensure proof stress and rigidity. A thick plate having a thickness exceeding 40 mm is not commercially available as a general building material, and is handled as a custom-made product, resulting in high costs. Moreover, when the thickness of the thick plate 6 exceeds 40 mm, the design standard intensity | strength of a thick plate must be reduced (by the notification based on a building standard law). Further, since the number of members is larger than that of the non-diaphragm column beam joint core, the diaphragms 6 and 7 to which the beams are joined have a shape projecting to the periphery of the short rectangular steel pipe 5, so that the member machining of the beams 4 is also possible. There is also a problem that it is complicated and takes time and effort for welding.

前記テーパ管形式の異径柱接合用柱梁接合構造10には以下の問題がある。テーパ管11は、4枚の台形をした板材、若しくはコの字状に折り曲げた2枚の板材それぞれが互いに適正な角度をなすように溶接接合して製作されるが、その製作に高度な技術と手間を要する。
また、H形鋼梁4の端部もテーパ管側面形状に合わせて加工しなければならず、この加工にも時間がかかる。また段違い梁とした場合には、テーパ管中間部にダイアフラムを設けなければならず、非常に設計も施工も手間がかかる。
The tapered tube-type column-to-column connection structure 10 for different diameter columns has the following problems. The taper tube 11 is manufactured by welding and joining four trapezoidal plate members or two plate members folded into a U-shape so as to form an appropriate angle with each other. It takes time and effort.
In addition, the end of the H-shaped steel beam 4 must be processed in accordance with the shape of the side surface of the tapered tube, which takes time. In the case of a stepped beam, a diaphragm must be provided in the middle part of the taper tube, which is very time consuming to design and construct.

特許文献4の特殊形状の柱梁接合部コア16による異径柱接合用柱梁接合構造15には以下の問題がある。
この柱梁接合部コア16は、その特殊な形状を鋳造成型や高周波過熱による断面増厚法で成型するため、各サイズの全体を成型する大型の金型を必要とし、また、成型に時間が掛かるなど、コストが高くなる。また、下階柱の径と上階柱の径とが同じ場合に用いる一般的なノンダイアフラム形式の柱梁接合部コアを材料に用いて成型することができず、取り付けられる柱梁のサイズに応じて都度最初から成型する必要があるという問題もある。
The column-beam joint structure 15 for connecting different-diameter columns using the special-shaped column-beam joint core 16 of Patent Document 4 has the following problems.
The column beam joint core 16 requires a large mold for molding the entire size of each size in order to mold the special shape by casting molding or a cross-section thickening method by high-frequency overheating. Cost increases, such as hanging. In addition, it is not possible to mold the material using the common non-diaphragm type column beam joint core that is used when the diameter of the lower column is the same as the diameter of the upper column. There is also a problem that it is necessary to mold from the beginning each time.

ところで、引用文献4のような特殊形状ではない単なる短尺厚肉角形鋼管による一般的なノンダイアフラム形式の柱梁接合部コアを異径柱接合用柱梁接合構造に採用するという発想は、種々の事情から退けられてきた。
また、短尺厚肉角形鋼管1の上端部内面に、上階柱を溶接固定するための四角形のプレートの周囲を溶接固定する構造が考えられるが、この場合、上階柱の管径によっては、あるいは上階柱の下階柱に対する位置によっては、柱梁接合部コアの内面と四角形のプレートの周囲との溶接ビード(溶接金属部)の上に、上階柱の下端を溶接する溶接ビードが重なる場合がある。この場合のように2つの部材の溶接ビードに他の部材を溶接する溶接ビードが重なることは、特に工学的に明確な根拠がある訳ではないが、一般的には良好な溶接接合部が得られないものとして避けられている背景がある。
ダイアフラムを用いずに梁を接合可能にしたというノンダイアフラム形式の柱梁接合部コアは、そもそもノンダイアフラムであるから、ダイアフラムを設けるという発想がないという背景があり、従来は、前記の通り、ノンダイアフラム形式の柱梁接合部コアに内ダイアフラム的なプレートを溶接固定するという構造は考慮外にあった。
By the way, the idea of adopting a general non-diaphragm-type column beam joint core made of a mere short thick square steel pipe which is not a special shape as in the cited document 4 to a column beam joint structure for different diameter column joints is various. It has been rejected from the circumstances.
In addition, a structure in which the periphery of a rectangular plate for fixing the upper floor column by welding is fixed to the inner surface of the upper end portion of the short thick-walled square steel pipe 1, but in this case, depending on the pipe diameter of the upper column, Alternatively, depending on the position of the upper column with respect to the lower column, there is a weld bead that welds the lower end of the upper column on the weld bead (welded metal part) between the inner surface of the column beam joint core and the periphery of the rectangular plate. May overlap. The fact that the weld bead for welding the other member overlaps the weld bead of the two members as in this case is not particularly clear from an engineering standpoint, but generally a good weld joint is obtained. There is a background that is avoided as inevitable.
The non-diaphragm column-beam joint core, which is capable of joining beams without using a diaphragm, is originally a non-diaphragm, so there is no idea of providing a diaphragm. The structure of welding and fixing the inner diaphragm plate to the diaphragm beam-column joint core was out of consideration.

本発明は上記背景のもとになされたもので、柱に角形鋼管を用いる建築物について下階柱の管径と上階柱の管径とが異なる場合に、管壁外面に鋼管梁を溶接接合可能なノンダイアフラム形式の柱梁接合部コアの上端平面内に上階柱を自由に溶接接合することができ、かつ、上階柱にかかる鉛直軸力および曲げモーメントを柱梁接合部コアに確実に伝達できる建築物の異径柱接合用柱梁接合構造を提供することを目的とする。   The present invention was made based on the above background, and in a building using a square steel pipe as a column, when the pipe diameter of the lower floor column and the pipe diameter of the upper floor column are different, the steel pipe beam is welded to the outer surface of the pipe wall. The upper floor column can be freely welded and joined to the upper end plane of the non-diaphragm column beam joint core that can be joined, and the vertical axial force and bending moment applied to the upper column can be applied to the beam beam joint core. An object of the present invention is to provide a beam-to-column connection structure for different-diameter column connections of a building that can be reliably transmitted.

上記課題を解決する請求項1の発明は、角形鋼管からなる下階柱の上端部に短尺厚肉角形鋼管からなるノンダイアフラム形式の柱梁接合部コアの下端部が溶接接合され、前記柱梁接合部コアの上端部に、前記下階柱より小径の角形鋼管からなる上階柱を溶接接合する建築物の異径柱接合用柱梁接合構造であって、
角形鋼管からなる下階柱の上端部に短尺厚肉角形鋼管からなるノンダイアフラム形式の柱梁接合部コアの下端部が溶接接合され、前記柱梁接合部コアの上端部に、前記下階柱より小径の角形鋼管からなる上階柱を溶接接合する建築物の異径柱接合用柱梁接合構造であって、
前記柱梁接合部コアの段差を持たない上端部内面に、周囲に開先を形成した四角形板状の水平面材が、その上面が前記柱梁接合部コアの上端面と面一となるように溶接接合され、かつ、前記柱梁接合部コアの上端部内面と前記水平面材の周囲との間の溶接ビードの余盛りが平坦に切削又は研削されて、柱梁接合部コアの上端面と前記水平面材の上面と溶接ビードの上面とが面一に形成され異径柱接合用柱梁接合仕口と、
前記異径柱接合用柱梁接合仕口の下端に溶接接合される下階柱と、
前記異径柱接合用柱梁接合仕口の上端面に溶接接合される前記下階柱より小径の上階柱とを備え、
前記上階柱は、当該上階柱の下端部と前記異径柱接合用柱梁接合仕口上端面との間の溶接ビードが、前記柱梁接合部コアと前記水平面材との間の平坦に切削又は研削された溶接ビードと少なくとも一部が重なる態様で溶接接合されていることを特徴とする。
According to the first aspect of the present invention for solving the above problem, the lower end of a non-diaphragm column beam joint core made of a short thick-walled square steel pipe is welded to the upper end portion of a lower floor column made of a square steel pipe, A column beam joint structure for different-diameter column joining of a building in which an upper floor column made of a square steel pipe having a diameter smaller than that of the lower floor column is welded to the upper end portion of the joint core,
The lower end of a non-diaphragm column-beam joint core made of a short thick-walled square steel pipe is welded to the upper end of a lower-floor column made of square steel pipe, and the lower-floor column is joined to the upper end of the beam-beam joint core. It is a beam-to-column connection structure for different-diameter column connection of a building in which an upper floor column made of a smaller diameter square steel pipe is welded,
A rectangular plate-shaped horizontal surface material having a groove formed on the inner surface of the upper end portion of the beam-beam joint core without a step so that the upper surface thereof is flush with the upper surface of the beam-beam joint core. The weld bead and the surplus of the weld bead between the inner surface of the upper end of the beam-beam joint core and the periphery of the horizontal surface material are cut or ground flatly, and the upper end surface of the beam-beam joint core and the and different径柱joining beam bonding joint that the upper surfaces and weld bead horizontal surface material is formed flush,
A lower column that is welded to the lower end of the column beam joint for the different diameter column joint;
An upper floor pillar having a smaller diameter than the lower floor pillar welded and joined to the upper end surface of the column beam joint for different diameter pillar joints,
In the upper column, the weld bead between the lower end of the upper column and the upper end surface of the column connection joint for different diameter columns is flat between the core of the column connection and the horizontal member. It is characterized in that it is welded and joined in such a manner that at least a portion thereof overlaps with the cut or ground weld bead.

請求項は、請求項1の建築物の異径柱接合用柱梁接合構造において、平面視で上階柱の板厚部分と柱梁接合部コアの板厚部分とが少なくとも一部重なっていることを特徴とする。 Claim 2 is the column-beam joint structure for different-diameter column joints of a building according to claim 1, wherein the plate thickness portion of the upper floor column and the plate thickness portion of the beam-beam joint core overlap at least partially in plan view. It is characterized by being.

本発明の異径柱接合用柱梁接合構造によれば、異径柱接合用柱梁接合仕口の上端部に、柱梁接合部コアの上端部内面に当該柱梁接合部コア上端と面一となるように溶接接合された水平面材を有するので、下階柱より小径の上階柱を容易に接合することができる。
また、本発明では短尺厚肉角形鋼管と1枚の水平面材のみで異径柱接合用柱梁接合仕口を構成することが可能なので、厚肉プレートを用いた異径柱接合用柱梁接合構造と比較して部材数が少なく、加工、溶接の手間が抑えられ、製作コストを低減できる。
また、厚肉プレートを用いた従来の異径柱接合用柱梁接合構造では、必要となる厚肉プレートの板厚が厚いため市中で入手しにくいが、本発明の異径柱接合用柱梁接合構造によれば、前記厚肉プレートより薄いプレート(水平面材)を用いることができるので、材料の市中での入手が容易である。
特許文献4の特殊形状のノンダイアフラム形式の柱梁接合部コア(柱梁接合金物)と異なり、下階柱の径と上階柱の径とが同じ場合に用いる、単なる短尺厚肉角形鋼管である一般的なノンダイアフラム形式の柱梁接合部コアを材料に用いることができるので、各サイズに応じた水平面材と裏当金があれば製作することができ、要求性能に応じた最適構造とすることが可能である。
According to the column beam joint structure for different diameter column joint of the present invention, the upper end of the column beam joint core is connected to the upper end portion of the column beam joint for the different diameter column joint, the upper end portion inner surface of the column beam joint core. because it has a weld joined horizontal member so that one, Ru can be easily joined to Kaibashira on the smaller diameter than the lower Kaibashira.
Further, in the present invention, since it is possible to configure a column beam joint for different diameter column joining with only a short thick square steel pipe and one horizontal plane member, it is possible to construct a column beam joint for different diameter column joining using a thick plate. Compared to the structure, the number of members is small, the labor of processing and welding can be suppressed, and the manufacturing cost can be reduced.
In addition, in the conventional beam-to-column connection structure for connecting different diameter columns using thick plates, the thickness of the required thick plate is so thick that it is difficult to obtain in the market. According to the beam joint structure, since a plate (horizontal plane material) thinner than the thick plate can be used, it is easy to obtain the material in the market.
Unlike the special non-diaphragm type column beam joint core (column beam joint hardware) of Patent Document 4, it is a simple short thick-walled square steel pipe used when the diameter of the lower column is the same as that of the upper column. Since a general non-diaphragm type column beam joint core can be used as a material, it can be manufactured with a horizontal surface material and backing metal according to each size, and an optimum structure according to the required performance Is possible.

また、柱梁接合部コアの上端部内面と前記水平面材の周囲との間の溶接ビードの余盛りが平坦に切削又は研削されているので、上階柱の下端部と前記異径柱接合用柱梁接合仕口上端面との間の溶接ビードが、柱梁接合部コアと水平面材との間の溶接ビードと重なる場合でも、上階柱を異径柱接合用柱梁接合仕口の上端面に溶接接合することが可能となる。なお、上階柱の下階柱に対する位置関係について、柱梁接合部コアと水平面材との間の溶接ビードに上階柱の溶接接合部(溶接ビード)が必ずくるという訳ではないが、そのような位置関係となる場合は充分あるので、そのような位置関係の場合に対応可能であることは必要である。 In addition, the remaining prime weld bead between the periphery of the upper end inner surface of the beam-column joints core the horizontal member has a flat cutting or grinding, wherein the lower end of the upper Kaibashira different径柱junction Even if the weld bead between the upper end of the beam-column joint and the welded bead between the column-beam joint core and the horizontal surface overlaps, the upper column is placed above the column-beam joint for different diameter columns. It becomes possible to weld-join to the end face. As for the positional relationship of the upper column with respect to the lower column, the welded joint (weld bead) of the upper column does not necessarily come to the weld bead between the beam-column joint core and the horizontal surface material. because if the positional relationship as well some, it Ru required der such is adaptable to the case of the positional relationship.

請求項によれば、平面視で上階柱の板厚部分と柱梁接合部コアの板厚部分とが少なくとも一部重なっているので、上階柱にかかる軸力や曲げモーメントが柱梁接合部コアへ直接伝達される部分が存在することなり、水平面材への伝達応力や曲げモーメントが低減し、水平面材の厚を低減できる。 According to the second aspect , since the plate thickness portion of the upper story column and the plate thickness portion of the column beam joint core overlap at least partially in plan view, the axial force and bending moment applied to the upper story column are A portion that is directly transmitted to the joint core is present, so that the transmission stress and bending moment to the horizontal surface material are reduced, and the thickness of the horizontal surface material can be reduced.

本発明の一実施例の建築物の異径柱接合用柱梁接合構造20を示すもので、(イ)は断面図、(ロ)は平面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view and (b) is a plan view of a beam-to-column connection structure 20 for different-diameter column connection of a building according to an embodiment of the present invention. 上記異径柱接合用柱梁接合構造における異径柱接合用柱梁接合仕口21のみを示すもので、(イ)は斜視図、(ロ)は断面図、(ハ)は平面図、(ニ)は柱梁接合部コアの上端部に水平面材を配置した、溶接接合する前の状態を示す斜視図、(ホ)は水平面材のみを示す斜視図である。FIG. 2 shows only the column-beam joint 21 for different-diameter column connection in the column-beam connection structure for different-diameter column connection, where (A) is a perspective view, (B) is a cross-sectional view, (C) is a plan view, (D) is a perspective view showing a state before welding joining, in which a horizontal plane member is arranged at the upper end of the column beam joint core, and (e) is a perspective view showing only the horizontal plane member. 上記建築物の異径柱接合用柱梁接合構造を説明する斜視図である。It is a perspective view explaining the beam-column joining structure for different diameter column joining of the said building. 上記異径柱接合用柱梁接合仕口と上階柱との溶接接合部を説明するもので、(イ)は柱梁接合部コアと水平面材との溶接作業を終えた段階の断面図、(ロ)は溶接ビードの余盛りを切削した段階の断面図、(ハ)は次いでその上面に上階柱を溶接接合した段階の断面図である。Explaining the welded joint between the above-mentioned column beam joint for different diameter column joint and the upper floor column, (a) is a cross-sectional view at the stage where the welding work between the column beam joint core and the horizontal plane member is finished, (B) is a cross-sectional view at a stage where the surplus of the weld bead is cut, and (C) is a cross-sectional view at a stage where the upper floor column is welded to the upper surface thereof. 柱梁接合部コアと水平面材との溶接接合部に対して上階柱の溶接接合位置が図4(ハ)と異なる場合について説明する図であり、(イ)は上階柱の板厚部分と柱梁接合部コアの板厚部分とが一部重なっている場合、(ロ)は上階柱の溶接接合部が柱梁接合部コアと水平面材との溶接接合部から離れている場合を説明する図である。It is a figure explaining the case where the welding joint position of an upper floor column differs with respect to the welding joint part of a beam-column joint core and a horizontal surface material from FIG. (B) shows the case where the welded joint of the upper column is separated from the welded joint between the beam-column joint core and the horizontal plane member. It is a figure explaining. 上階柱の下階柱に対する位置関係について説明する図であり、(イ)は中柱形式の場合、(ロ)は側柱形式の場合、(ハ)は外柱形式の場合、(ニ)は隅柱形式の場合を示す。いずれの図も上側が正面図、下側が平面図である。It is a figure explaining the positional relationship with respect to the lower floor pillar of the upper floor pillar, (b) in the case of the middle pillar form, (b) in the case of the side pillar form, (c) in the case of the outer pillar form, (d) Indicates the case of the corner pillar type. In each figure, the upper side is a front view and the lower side is a plan view. (イ)は柱梁接合部コアと水平面材との溶接部に上階柱の溶接部が重なった場合の溶接部の品質を確認する目的で作製したサンプルの溶接部から素材試験片を採取し、ビッカース硬さ試験を行なったビッカース硬さ結果を示す図、(ロ)は硬さ測定位置を説明する図である。(A) is to collect material specimens from the welded part of the sample prepared for the purpose of checking the quality of the welded part when the welded part of the upper column is overlapped with the welded part of the column beam joint core and the horizontal surface material. The figure which shows the Vickers hardness result which performed the Vickers hardness test, (b) is a figure explaining a hardness measurement position. 通しダイアフラム形式である厚肉プレート形式の異径柱接合用柱梁接合構造のM−N相関曲線(実線)と、ノンダイアフラム形式の柱梁接合部コアによる本発明の異径柱接合用柱梁接合構造のM−N相関曲線(破線)とを比較して示すグラフである。Column beam for different diameter column connection of the present invention by the MN correlation curve (solid line) of the column beam connection structure for different diameter column connection of thick plate type which is a through diaphragm type and the non-diaphragm type column beam connection core It is a graph which compares and shows the MN correlation curve (broken line) of junction structure. ノンダイアフラム形式の柱梁接合部コアに用いる短尺厚肉角形鋼管の断面形状の一例を示す図である。It is a figure which shows an example of the cross-sectional shape of the short thick square steel pipe used for the column beam junction part core of a non-diaphragm type. 従来の建築物の異径柱接合用柱梁接合構造の一例を示すもので、通しダイアフラム形式である厚肉プレート形式の場合の断面図である。It shows an example of a conventional beam-column joint structure for different-diameter column joints of a building, and is a cross-sectional view in the case of a thick plate format which is a through diaphragm format. 従来の建築物の異径柱接合用柱梁接合構造の他の例を示すもので、通しダイアフラム形式であるテーパ管形式の場合の断面図である。It is sectional drawing in the case of the taper pipe type which shows the other example of the conventional column beam connection structure for different diameter column connections of a building, and is a through-diaphragm type. 従来の建築物の異径柱接合用柱梁接合構造の一例を示すもので、角形断面管の上端部内面に内側に張出した補強部を形成した特殊形状のノンダイアフラム形式の柱梁接合部コアを示すもので、(イ)は平面説明図、(ロ)は断面説明図である(なお、特許文献4の図を用いた)。An example of a conventional beam-to-column structure for connecting different-diameter columns in a building. A non-diaphragm-type beam-column joint core with a special shape in which a reinforcing portion that protrudes inward is formed on the inner surface of the upper end of a square section tube. (A) is a plane explanatory view, and (B) is a cross-sectional explanatory view (Note that the figure of Patent Document 4 is used).

以下、本発明の建築物の異径柱接合用柱梁接合構造を実施するための形態について、図面を参照して説明する。   EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the column-beam joining structure for different diameter column joining of the building of this invention is demonstrated with reference to drawings.

図1(イ)は本発明の一実施例の建築物の異径柱接合用柱梁接合構造20の断面図、(ロ)は平面図である。図2は上記異径柱接合用柱梁接合構造20における異径柱接合用柱梁接合仕口21のみを示すもので、(イ)は斜視図、(ロ)は断面図、(ハ)は平面図、(ニ)は柱梁接合部コア22の上端部に水平面材23を配置した、溶接固定する前の状態を示す斜視図、(ホ)は水平面材23のみを示す斜視図である。図3は上記異径柱接合用柱梁接合構造を説明する斜視図である。
これらの図に示すように、この異径柱接合用柱梁接合構造20は、角形鋼管からなる下階柱3の上端部に短尺厚肉角形鋼管からなるノンダイアフラム形式の柱梁接合部コア22の下端部が溶接接合され、その柱梁接合部コア22の上端部に、前記下階柱3より小径の角形鋼管からなる上階柱2を溶接接合する構造であり、異径柱接合用柱梁接合仕口21により構成される。
前記異径柱接合用柱梁接合仕口21は、短尺厚肉角形鋼管からなる前記柱梁接合部コア22の上部内側に、図2(ホ)にも示したような周囲に開先23aを形成した四角形板状の前記水平面材23を、その上面が柱梁接合部コア22の上端と面一になるように溶接接合して形成される。なお、仕口内部に水平材を設ける一般的な内ダイアフラムは、梁からの水平力を伝達及び負担するものであるが、本発明における水平面材23は、梁4からの水平力の伝達及び負担を要求されておらず、梁4の接合位置に関係なく柱梁接合部コア22の上端と面一になるように溶接接合され、上階柱3の接合に適した配置がされる。
柱梁接合部コア22に水平面材23を溶接接合する際、図2(ロ)にも示すように、柱梁接合部コア22の上端近傍の内周面に、上端より水平面材23の板厚分だけ下の位置にて裏当て金24を仮付け溶接し、その上に水平面材23を載せた図2(ニ)の状態にて開先23aの部分で溶接する。その溶接接続部(溶接ビード25)をドットハッチングで示す。各部の溶接はいずれも完全溶け込み溶接である。
なお、本実施例では、上階柱及び下階柱の材質はBCR295(日本鉄鋼連盟製品規格)、柱梁接合部コア及び水平面材の材質はSN490C(JIS
G 3136)を用いているが、これに限らず他の材質を用いてもよい。
FIG. 1 (a) is a cross-sectional view of a column-beam joining structure 20 for different-diameter column joining of a building according to an embodiment of the present invention, and (b) is a plan view. FIG. 2 shows only the beam-column joint 21 for different-diameter column connection in the column-beam connection structure 20 for different-diameter column connection, where (A) is a perspective view, (B) is a cross-sectional view, and (C) is a cross-sectional view. FIG. 4D is a perspective view illustrating a state before welding and fixing, in which a horizontal plane member 23 is disposed at the upper end of the beam-column joint core 22, and FIG. 5E is a perspective view illustrating only the horizontal plane member 23. FIG. 3 is a perspective view for explaining the column beam connection structure for different diameter column connections.
As shown in these drawings, this column-to-column connection structure 20 for connecting different-diameter columns is a non-diaphragm-type column beam joint core 22 made of a short thick-walled square steel pipe at the upper end of a lower floor pillar 3 made of a square steel pipe. The lower-column part is weld-joined, and the upper-column 2 made of a square steel pipe having a smaller diameter than the lower-floor column 3 is weld-joined to the upper-end part of the column-beam joint core 22. It is composed of a beam joint 21.
The beam-column joint 21 for different-diameter column connection is provided with a groove 23a on the inner side of the upper portion of the column-beam joint core 22 made of a short thick square steel pipe, as shown in FIG. The formed rectangular plate-like horizontal plane member 23 is formed by welding and joining so that the upper surface thereof is flush with the upper end of the column beam joint core 22. Note that a general inner diaphragm in which a horizontal member is provided inside the joint transmits and bears a horizontal force from the beam. However, the horizontal member 23 in the present invention transmits and loads a horizontal force from the beam 4. Therefore, regardless of the joining position of the beam 4, it is welded and joined so as to be flush with the upper end of the column beam joint core 22, and the arrangement suitable for joining the upper floor pillar 3 is made.
When the horizontal plane member 23 is welded to the beam-column joint core 22, as shown in FIG. 2 (b), the plate thickness of the horizontal plane member 23 from the upper end to the inner peripheral surface in the vicinity of the upper end of the beam-column joint core 22. The backing metal 24 is tack-welded at a position below that amount, and the groove 23a is welded in the state of FIG. The weld connection part (weld bead 25) is indicated by dot hatching. The welding of each part is complete penetration welding.
In this example, the material of the upper and lower floor pillars is BCR295 (Japan Iron and Steel Federation product standard), and the material of the column beam joint core and horizontal plane material is SN490C (JIS
G 3136) is used, but the present invention is not limited to this, and other materials may be used.

図示例の柱梁接合部コア22は、図9で説明した柱梁接合部コア1と同様に、2つの熱間圧延溝形鋼の二丁合わせ溶接による厚肉角形鋼管を用いており、その角形断面の2辺の内面が平面視でテーパ状をなしている。したがって、前記水平面材23の対応する2辺の部分はそのテーパ形状に合わせて開先を形成している。なお、前記裏当て金24の外側輪郭も前記テーパ形状に合わせた形状としている。   The column beam joint core 22 in the illustrated example uses a thick-walled square steel pipe formed by two-piece welding of two hot-rolled channel steels in the same manner as the column beam joint core 1 described in FIG. The inner surfaces of the two sides of the square cross section are tapered in plan view. Accordingly, the corresponding two sides of the horizontal surface member 23 form a groove in accordance with the taper shape. The outer contour of the backing metal 24 is also shaped to match the tapered shape.

柱梁接合部コア22に水平面材23を溶接接合してなる前記異径柱接合用柱梁接合仕口21の下端部が下階柱3の上端部に溶接接合され、上端面に下階柱3より小径の上階柱2が溶接接合される。また、異径柱接合用柱梁接合仕口21の柱梁接合部コア22の側面(管壁面)にH形鋼梁4が溶接接合される。図3はその状況を説明する図である。   The lower end of the column-beam joint 21 for connecting different-diameter columns formed by welding a horizontal plane member 23 to the beam-beam joint core 22 is welded to the upper end of the lower floor column 3, and the lower floor column is formed on the upper surface. The upper column 2 having a diameter smaller than 3 is welded. In addition, the H-shaped steel beam 4 is welded to the side surface (tube wall surface) of the column beam joint core 22 of the column beam joint connection 21 for different diameter column joint. FIG. 3 is a diagram for explaining the situation.

図示例では図1及び要部を拡大した図4(ハ)に示すように、上階柱2は、当該上階柱2の下端部と前記異径柱接合用柱梁接合仕口21の上端面との間の溶接ビード26が、前記柱梁接合部コア22と前記水平面材23との間の溶接ビード25と一部が重なる態様で溶接接合されている。
この場合、図4(イ)、(ロ)に示すように、溶接ビード25の余盛り25aを切削又は研削して平坦にし、柱梁接合部コア22の上端と水平面材23の上面と溶接ビード25の上端との全体(すなわち、異径柱接合用柱梁接合仕口21の上面全体)が面一の水平面になるようにするとよい。
In the illustrated example, as shown in FIG. 1 and FIG. 4C, which is an enlarged view of the main part, the upper floor column 2 is located above the lower end portion of the upper floor column 2 and the column beam joint connection 21 for the different diameter column joint. The weld bead 26 between the end faces is weld-joined in such a manner that the weld bead 25 partially overlaps the weld bead 25 between the column beam joint core 22 and the horizontal plane member 23.
In this case, as shown in FIGS. 4A and 4B, the surplus 25a of the weld bead 25 is cut or ground to make it flat, and the upper end of the column beam joint core 22, the upper surface of the horizontal plane member 23, and the weld bead. It is preferable that the whole of the upper end of 25 (that is, the entire upper surface of the column-beam joint 21 for different-diameter column joint) is a flush horizontal surface.

ところで、発明が解決しようとする課題の項において、柱梁接合部コアの内面と四角形のプレートの周囲との溶接ビードの上に、上階柱を溶接する溶接ビードが重なる場合のように、2つの部材の溶接ビードに他の部材を溶接する溶接ビードが重なることは、特に工学的に明確な根拠がある訳ではないが、一般的には良好な溶接接合部が得られないものとして避けられていると記載した。
しかし、本願発明者らが図1や図4(ハ)のように、柱梁接合部コア22と水平面材23との溶接ビード25の上に上階柱2の溶接ビード26が重なる場合について実験をした結果によれば、溶接品質に問題のない溶接接合が得られることが確認された。
By the way, in the section of the problem to be solved by the invention, as in the case where the weld bead for welding the upper column overlaps the weld bead between the inner surface of the column beam joint core and the periphery of the rectangular plate, 2 The overlap of a weld bead that welds another member to the weld bead of one member is not particularly clear from an engineering standpoint, but is generally avoided as a good weld joint cannot be obtained. It has been described.
However, as shown in FIG. 1 and FIG. 4C, the inventors of the present application conducted an experiment in the case where the weld bead 26 of the upper column 2 overlaps the weld bead 25 of the column beam joint core 22 and the horizontal plane member 23. According to the results, it was confirmed that a weld joint having no problem in welding quality can be obtained.

前記実験の内容について説明する。
試料として、柱梁接合部コアが熱間圧延溝形鋼の二丁合わせ溶接による短尺厚肉角形鋼管(外形300×300mm・板厚29mm・材質SN490C(JIS-G-3136))、上階柱が口-250×250×16(BCR295)、水平面材がPL-28(SN490C)、ソリッドワイヤがYM-55C(Y)(YGW18)を用いて中柱形式の異径柱接合用柱梁接合仕口サンプルを製作した。
溶接形状および条件は「建築工事標準仕様書JASS6鉄骨工事:日本建築学会(2007.2)」、「2008年度版冷間成形角形鋼管設計・施工マニュアル:独立行政法人建築研究所(2008.12)」に準拠して設定した。溶接条件および形状を表1に示す。柱梁接合部コア-水平面材溶接、水平面材-上階柱溶接のいずれも設定入熱およびパス間温度を満足し、溶接後のUT検査に合格した。また、溶接外観も不良部分が無いことを確認した。

Figure 0006179757
The contents of the experiment will be described.
As a sample, the column beam joint core is a short thick-walled square steel pipe (external dimensions 300 x 300 mm, plate thickness 29 mm, material SN490C (JIS-G-3136)) by hot-rolled grooved steel, and the upper floor column -250 × 250 × 16 (BCR295), horizontal plane material is PL-28 (SN490C), solid wire is YM-55C (Y) (YGW18) Mouth samples were made.
Welding shapes and conditions conform to “Standard Building Construction Specification JASS6 Steel Construction: Architectural Institute of Japan (2007.2)”, “2008 Cold Forming Square Steel Pipe Design and Construction Manual: National Institute for Building Science (December 2008)” Set. Table 1 shows welding conditions and shapes. Both the beam-to-column joint core-horizontal plane welding and horizontal plane-upper column welding satisfy the set heat input and interpass temperature, and pass the UT inspection after welding. It was also confirmed that there were no defective parts in the weld appearance.
Figure 0006179757

溶接部の品質を確認する目的で前記サンプルの溶接部から素材試験片を採取し、ビッカース硬さ試験とシャルピー衝撃試験を行った。
図7(イ)にビッカース硬さ結果を示す。母材部に比べて熱影響部および溶接部が硬くなる傾向にあるが、最高硬さが220HVであり低温割れを起こす可能性は低い。また、顕著な熱影響部の軟化もなかった。図7(イ)の横軸である硬さ測定位置を図7(ロ)に示す(上階柱の内面から1mm深さ位置でのP点(0)からQ点(55)までの領域)。
シャルピー衝撃試験においても溶接部の0℃吸収エネルギーが100Jを超えており、溶接品質は良好であった(表2にシャルピー衝撃試験結果を示す)。
上記の通りであり、従来、2つの部材の溶接ビードに他の部材を溶接する溶接ビードが重なることは、一般的には良好な溶接接合部が得られないものとして避けられてきたが、少なくとも、上述のような柱梁接合部コア22と水平面材23との溶接ビード25の上に上階柱2の溶接ビード26が重なる溶接施工をした場合については、良好な溶接が行なわれることが分かった。

Figure 0006179757
For the purpose of confirming the quality of the welded part, a material test piece was taken from the welded part of the sample and subjected to a Vickers hardness test and a Charpy impact test.
FIG. 7 (a) shows the Vickers hardness results. Although the heat-affected zone and the weld zone tend to be harder than the base metal portion, the maximum hardness is 220 HV, which is unlikely to cause cold cracking. Moreover, there was no remarkable softening of the heat affected zone. The hardness measurement position, which is the horizontal axis in FIG. 7 (a), is shown in FIG. 7 (b) (region from point P (0) to point Q (55) at a depth of 1 mm from the inner surface of the upper column) .
Also in the Charpy impact test, the 0 ° C. absorbed energy of the weld exceeded 100 J, and the welding quality was good (Table 2 shows the Charpy impact test results).
As described above, it has been generally avoided that a weld bead for welding another member overlaps a weld bead of two members, as a generally good weld joint cannot be obtained. In the case where the welding bead 26 of the upper column 2 overlaps the weld bead 25 of the column beam joint core 22 and the horizontal surface member 23 as described above, it is understood that good welding is performed. It was.
Figure 0006179757

ノンダイアフラム形式の柱梁接合部コアによる本発明の異径柱接合用柱梁接合構造と、従来の通しダイアフラム形式(厚肉プレート形式)による異径柱接合用柱梁接合構造の構造設計上の差異について説明する。
(1)従来の通しダイアフラム形式による異径柱接合用柱梁接合構造。
前述の『鋼構造接合部設計指針』に、冷間ロール成形角形鋼管(BCR295)を用いた場合の通しダイフラム形式による異幅接合形式箱形断面柱梁接合部における通しダイアフラム必要板厚が記載されており、表3に示す。この必要板厚は、その算定要領の詳細は省略するが、中柱形式、側柱形式、外柱形式、隅柱形式の4種類の接合形式に対して、降伏線理論と柱の軸降伏エネルギーを組み合わせた極限解析を行い、得られた塑性曲げ耐力を用いて算定した結果である。

Figure 0006179757
(2)ノンダイアフラム形式の柱梁接合部コアによる本発明の異径柱接合用柱梁接合構造。
ノンダイアフラム形式の柱梁接合部コアによる異径柱接合用柱梁接合構造では、上階柱の応力は水平面材の面外曲げ抵抗を介して柱梁接合部コアに伝達されるため、水平面材のの面外曲げ耐力および面外曲げ剛性に配慮して、水平面材の板厚を設計する必要がある。
本発明の異径柱接合用柱梁接合構造は、柱梁接合部コア(短尺厚肉角形鋼管)の上端部に水平面材を溶接固定した構造を有しており、上階柱の応力が柱梁接合部コアに伝達される態様としては、通しダイアフラム形式(厚肉プレート形式)による異径柱接合用柱梁接合構造の場合と基本的に同じ構造と言える。したがって、本発明の異径柱接合用柱梁接合構造における水平面材の必要板厚の設計には、前述の『鋼構造接合部設計指針』において通しダイアフラムの必要板厚を算定した設計手法(算定手法)を採用することができる。
前記表3の通しダイアフラム必要板厚はパネル接合部にBCR295(F値=295N/mm2)を用いた場合であり、材質がSN490Cである実施例の柱梁接合部コア(F値=325N/mm2)はBCR295よりも強度が高く板厚も29mmと厚いため、前述の通り「鋼構造接合部設計指針」に従い水平面材の板厚を設定すれば改めて接合部の構造計算を行わずに柱梁接合部コアの上下を異幅とすることができると考えられる。
図8に通しダイアフラム異径柱接合用柱梁接合構造と本発明の異径柱接合用柱梁接合構造のM−N相関曲線を示す。表4に通しダイアフラム異径柱接合用柱梁接合構造の仕様と本発明の異径柱接合用柱梁接合構造の仕様を示す。
本発明の異径柱接合用柱梁接合構造のは通しダイアフラム異径柱接合用柱梁接合構造のを上回っており、本発明の異径柱接合用柱梁接合構造は「鋼構造接合部設計指針」に従って水平面材の板厚を設定すれば、安全側に評価できることが分かる。
Figure 0006179757
On the structural design of the non-diaphragm beam-column joint structure for different-diameter column connection of the present invention and the conventional beam-diameter column-beam connection structure for different-diameter column connection (thick plate type). Explain the difference.
(1) A conventional beam-to-column connection structure for connecting different diameter columns using a through diaphragm type.
The above-mentioned “Guidelines for Designing Steel Structure Joints” describes the required thickness of through diaphragms in box-shaped cross-section column-beam joints with different width joints when using cold rolled square steel pipes (BCR295). Table 3 shows. Although the details of the calculation procedure for this required plate thickness are omitted, the yield line theory and the axial yield energy of the column are used for the four types of joint types: center column type, side column type, outer column type, and corner column type. Is the result of calculation using the obtained plastic bending strength j M p .
Figure 0006179757
(2) The column beam connection structure for different diameter column connection of the present invention by the non-diaphragm type column beam connection core.
In the non-diaphragm beam-column joint structure with different-diameter column joints, the stress of the upper column is transmitted to the beam-joint core through the out-of-plane bending resistance of the horizontal plate, In consideration of the out-of-plane bending strength and out-of-plane bending rigidity, it is necessary to design the plate thickness of the horizontal surface material.
The column-to-column connection structure for connecting different-diameter columns according to the present invention has a structure in which a horizontal plane material is welded and fixed to the upper end of a column-beam joint core (short thick square steel pipe), and the stress of the upper column is columnar. It can be said that the mode transmitted to the beam joint core is basically the same structure as that of the column beam joint structure for different diameter column joints using a through diaphragm type (thick plate type). Therefore, in the design of the required plate thickness of the horizontal plane members in the beam-to-column connection structure for different-diameter column connections of the present invention, a design method (calculation) that calculates the required plate thickness of the diaphragm through the aforementioned “steel structure joint design guidelines”. Method).
The required plate thickness of the through-diaphragm in Table 3 above is the case where BCR295 (F value = 295N / mm2) is used for the panel joint, and the column beam joint core of the embodiment whose material is SN490C (F value = 325N / mm2) ) Is stronger than BCR295 and has a plate thickness of 29mm. Therefore, if the plate thickness of the horizontal plane material is set according to the “steel structure joint design guidelines” as described above, it is not necessary to calculate the joint structure again. It is considered that the top and bottom of the core part can have different widths.
FIG. 8 shows an MN correlation curve of the column-beam joint structure for diaphragm different-diameter column joining and the column-beam joint structure for different-diameter column joint of the present invention. Table 4 shows the specifications of the diaphragm-to-diameter column-to-column connection structure and the specifications of the column-to-column connection structure of the present invention.
Well above the j M p of j M p is passed through the diaphragm different径柱joining beam-column joint structure different径柱joining beam-column joint structure of the present invention, Beam junction structure for a different径柱joint of the present invention It can be seen that if the thickness of the horizontal surface material is set according to the “steel structure joint design guideline”, it can be evaluated on the safe side.
Figure 0006179757

本発明の異径柱接合用柱梁接合構造によれば、以下のような種々の効果が得られる。
図10のように通しダイアフラム形式に厚肉プレート6を用いた異径柱接合用柱梁接合構造8では、必要となる厚肉プレートの板厚が厚いため市中で入手しにくいが、本発明の異径柱接合用柱梁接合構造によれば、水平面材として厚肉プレートより薄いプレートを用いることができるので、市中での入手が容易である。
また、ノンダイアフラム形式の柱梁接合部コアの一般的な長所であるが、通しダイアフラム形式に厚肉プレートを用いる技術や、通しダイアフラム形式で短尺角形鋼管をテーパ管にする技術に比べ、ノンダイアフラム形式の柱梁接合部コアを用いる本発明の異径柱接合用柱梁接合構造は、部材数が少ないため、開先加工および溶接個所が圧倒的に少ない。また、通しダイアフラム形式のようにダイアフラムが鋼管外周より周囲に張り出すことがないため、梁端部の加工が容易となる。
According to the column-beam joint structure for joining different-diameter columns of the present invention, the following various effects can be obtained.
As shown in FIG. 10, in the beam-to-column connecting structure 8 for connecting different diameter columns using the thick plate 6 in the form of a diaphragm, it is difficult to obtain in the market because the necessary thickness of the thick plate is thick. According to the column-beam joint structure for different-diameter column joints, a plate thinner than a thick plate can be used as a horizontal plane member, so that it is easily available in the city.
In addition, this is a general advantage of non-diaphragm type beam-column joint cores, but it is non-diaphragm compared to technology that uses a thick plate for through-diaphragm type and technology that uses a short-diameter square steel tube as a tapered tube with through-diaphragm type. The column beam connection structure for connecting different-diameter columns according to the present invention using the type of column beam connection core has a small number of members, and therefore has an extremely small number of groove processing and welding points. Moreover, since the diaphragm does not protrude from the outer periphery of the steel pipe as in the case of the through diaphragm type, the beam end portion can be easily processed.

本発明の異径柱接合用柱梁接合構造は、前述の通り『鋼構造接合部設計指針』が提案する厚肉プレート形式の場合と同様の設計手法で設計することができる。すなわち、上階鋼管柱にかかる軸力と曲げモーメントが、厚肉プレート形式の場合に上部ダイアフラムを介して短尺角形鋼管及び下階鋼管柱に伝わるのと同様の態様で、水平面材を介して柱梁接合部コアおよび下階鋼管柱に伝わるとする設計方法を採用できる。一方、本発明における柱梁接合部コアの板厚は厚いので、水平面材と上部ダイアフラムの板厚が同厚という条件でも、耐力および剛性は本工法の方が高くなる。前述した図8の極限解析結果の通りである。例えば上階柱軸力が1000kNの場合の水平面材又は上部ダイアフラムの塑性曲げ耐力は200kNmから500kNmに高くなる。
また、本発明では厚肉角形鋼管と1枚の水平面材のみで異径柱接合用柱梁接合構造を構成することができるので、厚肉プレート形式の場合と比較して部材数が少なく、加工、溶接の手間が抑えられ、製作コストを低減できる。
The beam-column joint structure for different-diameter column joint of the present invention can be designed by the same design method as the thick plate type proposed by the “steel structure joint design guideline” as described above. That is, in the same manner as the axial force and bending moment applied to the upper steel pipe column are transmitted to the short rectangular steel pipe and the lower steel pipe column through the upper diaphragm in the case of the thick plate type, It is possible to adopt a design method that is assumed to be transmitted to the beam joint core and the lower story steel pipe column. On the other hand, since the plate thickness of the column beam joint core in the present invention is thick, the proof stress and the rigidity are higher in this method even under the condition that the plate thickness of the horizontal plane member and the upper diaphragm are the same. It is as the limit analysis result of FIG. 8 mentioned above. For example, when the upper columnar axial force is 1000 kN, the plastic bending strength of the horizontal plane member or the upper diaphragm is increased from 200 kNm to 500 kNm.
Further, in the present invention, the column beam connection structure for different-diameter column connection can be configured with only a thick-walled square steel pipe and one horizontal plane member, so the number of members is small compared to the case of the thick-wall plate type, This saves the labor of welding and reduces the manufacturing cost.

本発明の異径柱接合用柱梁接合構造によれば、異径柱接合用柱梁接合仕口21の上面全体が面一となり、上階柱を異径柱接合用柱梁接合仕口21のフラットな上面全体において自由な位置に上階柱を接合することができる。図6は下階柱3がそれぞれ中柱形式の場合(イ)、側柱形式の場合(ロ)、外柱形式の場合(ハ)、隅柱形式の場合(ニ)について、上階柱2の位置をそれぞれに対応して異径柱接合用柱梁接合仕口21の上端面内で変えた具体例を示している。
また、柱梁接合部コアと水平面材との間の溶接ビードの余盛りを切削しない場合でも、水平面材の上面内で自由な位置に上階柱を接合することができる。
According to the column beam joining structure for different diameter column joining of the present invention, the entire upper surface of the column beam joining joint 21 for different diameter column joining is flush, and the upper floor column is joined to the column beam joining joint 21 for different diameter column joining. It is possible to join the upper column to a free position on the entire flat upper surface. FIG. 6 shows the case where the lower floor pillar 3 is in the middle pillar form (A), the side pillar form (B), the outer pillar form (C), and the corner pillar form (D). The specific example is shown in which the positions are changed in the upper end surface of the column-beam joint 21 for different-diameter column joints correspondingly.
In addition, even when the weld bead is not cut between the column beam joint core and the horizontal plane member, the upper floor column can be bonded at a free position within the upper surface of the horizontal plane member.

特許文献4の異径柱接合用柱梁接合構造と比較すると、次のような効果が得られる。
特許文献4の特殊形状のノンダイアフラム形式の柱梁接合部コア(柱梁接合金物)と異なり、下階柱の径と上階柱の径とが同じ場合に用いる、単なる短尺厚肉角形鋼管である一般的なノンダイアフラム形式の柱梁接合部コアを材料に用いることができるので、各サイズに応じた水平面材と裏当金があれば製作することができ、市場入手性がよく、要求性能に応じた最適構造とすることが可能である。
また、鋳造成型のように各サイズの全体を成型する大型の金型を必要としない。また、裏当金を用いた溶接と肉盛部の切削という簡単な加工によるので、高周波過熱による断面増厚法等と比べて製作コストが少なく済む。また、前記の通り一般的なノンダイアフラム形式の柱梁接合部コアを材料に用いることができるので、製作に要する時間が少なく済む。
Compared with the column-beam joint structure for different diameter column joint of Patent Document 4, the following effects are obtained.
Unlike the special non-diaphragm type column beam joint core (column beam joint hardware) of Patent Document 4, it is a simple short thick-walled square steel pipe used when the diameter of the lower column is the same as that of the upper column. Since a general non-diaphragm type column beam joint core can be used as the material, it can be manufactured if there is a horizontal plane material and backing metal according to each size, and it is available on the market and has the required performance. It is possible to obtain an optimum structure according to the conditions.
Further, a large mold for molding the entire size is not required as in casting. In addition, since it is a simple process of welding using a backing metal and cutting of the built-up portion, the manufacturing cost is less than that of a cross-section thickening method using high-frequency overheating. Further, as described above, since a general non-diaphragm type column beam joint core can be used as a material, the time required for manufacturing can be reduced.

また、本発明の異径柱接合用柱梁接合構造は、柱梁接合部コアがノンダイアフラム形式であることから、ノンダイアフラム形式の一般的な長所ではあるが、梁を厚肉角形鋼管(柱梁接合部コア)の側面内の自由な位置に接合することができるという長所がある。
また、通しダイアフラム形式の従来工法では、上階柱や梁のサイズに対応させてダイアフラムの位置や枚数を変化させなければならないのに対して、本発明では異径柱接合用柱梁接合仕口21の上面、側面部に自由に部材を接合できるため、設計、施工の手間を大幅に削減することができる。
In addition, the beam-to-column connection structure for connecting different-diameter columns according to the present invention is a general advantage of the non-diaphragm type because the column-beam joint core is a non-diaphragm type. There is an advantage that it can be joined at a free position in the side surface of the beam joint core.
In addition, in the conventional method of through diaphragm type, the position and number of diaphragms must be changed in accordance with the size of upper floor columns and beams. Since the members can be freely joined to the upper surface and the side surface portion of 21, the labor of design and construction can be greatly reduced.

なお、上述の実施例ではノンダイアフラム形式の柱梁接合部コアとして、2つの熱間圧延溝形鋼の二丁合わせ溶接による厚肉角形鋼管を用いる場合について説明したが、2つの熱間圧延山形鋼を対向させフランジ先端部どうしを突合せ溶接して角形断面にする山形鋼二丁合わせ溶接方式の厚肉角形鋼管を用いることも当然可能である。   In addition, although the above-mentioned Example demonstrated the case where the thick square-shaped steel pipe by two-joint welding of two hot-rolled channel steel was used as a non-diaphragm type column beam joint core, two hot-rolled chevrons were used. Naturally, it is also possible to use a thick-walled square steel pipe of a two-sided angle steel welding method in which the steel faces each other and the flange tip portions are butt welded to form a square cross section.

2 上階柱(上階鋼管柱)
3 下階柱(下階鋼管柱)
4 梁(H形鋼梁)
4a フランジ
20 建築物の異径柱接合用柱梁接合構造
21 異径柱接合用柱梁接合仕口
22 (ノンダイアフラム形式の)柱梁接合部コア
23 水平面材
23a 開先
24 裏当て金
25 溶接ビード(柱梁接合部コアと水平面材との間の溶接ビード)
25a 余盛り
26 溶接ビード(上階柱下端と異径柱接合用柱梁接合仕口上面との間の溶接ビード)
2 Upper floor pillar (upper steel pipe pillar)
3 Lower floor pillar (lower steel pipe pillar)
4 Beam (H-shaped steel beam)
4a Flange 20 Column-to-beam joint structure 21 for jointing different-diameter columns of a building Column-to-column connection port 22 for different-diameter column joints (non-diaphragm type) column-to-beam joint core 23 Horizontal plane member 23a Groove 24 Backing metal 25 Bead (weld bead between the column beam joint core and the horizontal plate)
25a surplus 26 weld bead (weld bead between the lower end of the upper column and the upper surface of the column-joint joint for different diameter columns)

Claims (2)

角形鋼管からなる下階柱の上端部に短尺厚肉角形鋼管からなるノンダイアフラム形式の柱梁接合部コアの下端部が溶接接合され、前記柱梁接合部コアの上端部に、前記下階柱より小径の角形鋼管からなる上階柱を溶接接合する建築物の異径柱接合用柱梁接合構造であって、
前記柱梁接合部コアの段差を持たない上端部内面に、周囲に開先を形成した四角形板状の水平面材が、その上面が前記柱梁接合部コアの上端面と面一となるように溶接接合され、かつ、前記柱梁接合部コアの上端部内面と前記水平面材の周囲との間の溶接ビードの余盛りが平坦に切削又は研削されて、柱梁接合部コアの上端面と前記水平面材の上面と溶接ビードの上面とが面一に形成され異径柱接合用柱梁接合仕口と、
前記異径柱接合用柱梁接合仕口の下端に溶接接合される下階柱と、
前記異径柱接合用柱梁接合仕口の上端面に溶接接合される前記下階柱より小径の上階柱とを備え、
前記上階柱は、当該上階柱の下端部と前記異径柱接合用柱梁接合仕口上端面との間の溶接ビードが、前記柱梁接合部コアと前記水平面材との間の平坦に切削又は研削された溶接ビードと少なくとも一部が重なる態様で溶接接合されていることを特徴とする建築物の異径柱接合用柱梁接合構造。
The lower end of a non-diaphragm column-beam joint core made of a short thick-walled square steel pipe is welded to the upper end of a lower-floor column made of square steel pipe, and the lower-floor column is joined to the upper end of the beam-beam joint core. It is a beam-to-column connection structure for different-diameter column connection of a building in which an upper floor column made of a smaller diameter square steel pipe is welded,
A rectangular plate-shaped horizontal surface material having a groove formed on the inner surface of the upper end portion of the beam-beam joint core without a step so that the upper surface thereof is flush with the upper surface of the beam-beam joint core. The weld bead and the surplus of the weld bead between the inner surface of the upper end of the beam-beam joint core and the periphery of the horizontal surface material are cut or ground flatly, and the upper end surface of the beam-beam joint core and the and different径柱joining beam bonding joint that the upper surfaces and weld bead horizontal surface material is formed flush,
A lower column that is welded to the lower end of the column beam joint for the different diameter column joint;
An upper floor pillar having a smaller diameter than the lower floor pillar welded and joined to the upper end surface of the column beam joint for different diameter pillar joints,
In the upper column, the weld bead between the lower end of the upper column and the upper end surface of the column connection joint for different diameter columns is flat between the core of the column connection and the horizontal member. A beam-to-column structure for joining different-diameter columns in a building, wherein the welded beads are welded and joined in such a manner that at least a portion thereof overlaps with a cut or ground weld bead.
平面視で上階柱の板厚部分と柱梁接合部コアの板厚部分とが少なくとも一部重なっていることを特徴とする請求項1記載の建築物の異径柱接合用柱梁接合構造。   2. The beam-to-column connection structure for different-diameter column connection of a building according to claim 1, wherein the plate-thickness portion of the upper column and the plate-thickness portion of the beam-beam joint core overlap at least partially in plan view. .
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