JPH05106277A - Joint construction of reinforced concrete column and structural steel beam - Google Patents

Abstract

PURPOSE:To enable design and execution by mounting a square steel pipe having cross longitudinal-perpendicular stiffeners thereinto to a column and beam junction of a reinforced concrete column, and jointing a structural steel beam therewith. CONSTITUTION:Cross longitudinal-perpendicular stiffeners 1 are welded and fixed to the inside of a square steel pipe C. After that, the steel pipe C is mounted to a column and beam junction of a reinforced concrete column A, and extra length section in excess of a slab thickness (t) from both up and down flanges 2 of structural steel beams B are formed to both up and down ends of the steel pipe C. Then, webs 4 of the beams B are connected to gusset plates 3 projected to the peripheral surface of the steel pipe C with high tension bolts 5. When shearing inputted to the column and beam junction is small, the stiffeners 1 are arranged to only part with the flanges 2 as the center. In addition, if necessary, the end of the steel pipe C can be extended to form a brace mounting section. According to the constitution, the column and beam junction can be easily executed and, at the same time, stress can be clearly transferred between the column and the beam, so that design and execution can be easily made, and horizontal strength and rigidity of a high-rise building, etc., can be easily controlled.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は鉄筋コンクリート柱（以
下ＲＣ柱と略記する）と鉄骨梁とからなるラーメン架構
の柱、梁接合部に係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column and a beam joint of a rigid frame structure composed of a reinforced concrete column (hereinafter abbreviated as RC column) and a steel beam.

【０００２】[0002]

【従来の技術】図７乃至図１３は従来提案されているＲ
Ｃ柱、鉄骨梁構造における柱、梁接合部を示し、図７は
直交する鉄骨梁ａをＲＣ柱ｂに載せ、柱梁接合部を帯筋
で補強したものである。図８は図７における帯筋の代り
に、柱梁接合部を薄鋼板製のふさぎ板ｃで封塞したもの
である。図中ｄは柱主筋、ｅは帯筋、ｆは鉄骨梁ａのフ
ランジ面より柱内に突設されただぼ筋である。2. Description of the Related Art FIGS.
FIG. 7 shows a C-column, a column in a steel beam structure, and a beam joint, and FIG. 7 shows an orthogonal steel beam a mounted on an RC column b, and the column-beam joint is reinforced with a band. In FIG. 8, instead of the stirrup in FIG. 7, the beam-column joint is sealed with a thin steel plate c. In the figure, d is a main column bar, e is a band bar, and f is a dull bar projecting from the flange surface of the steel beam a into the column.

【０００３】図９は図７において直交する鉄骨梁ａの上
下に夫々四角形のバンドプレートｇを配設して補強した
ものである。図１０、図１１及び図１２は図８の変形例
で、鉄骨梁ａのフランジを接合部間で絞り込み、柱、梁
接合部中央では梁ウエブのみ貫通し、また梁フランジ上
下に４角のバンドプレートｈを配設して補強したもので
ある。FIG. 9 shows a structure in which rectangular band plates g are arranged above and below the steel beams a which are orthogonal to each other in FIG. 7 for reinforcement. 10, 11 and 12 are modified examples of FIG. 8 in which the flange of the steel beam a is narrowed down between the joints, only the beam web penetrates through the center of the column and the beam joints, and the rectangular band is located above and below the beam flange. The plate h is arranged and reinforced.

【０００４】図１３は外ダイヤフラムｉを有するコンク
リート充填鋼管柱ｊに鉄骨梁ａを接合したものである。FIG. 13 shows a concrete-filled steel tubular column j having an outer diaphragm i joined to a steel beam a.

【０００５】[0005]

【発明が解決しようとする課題】前記各柱、梁接合部の
部分架構に地震力を想定した繰返し加力実験を行った結
果、図７を除く他の柱、梁接合部は優れた復元力特性を
示し、いずれも耐震性能に優れているといえる。しかし
ながらＲＣ柱、鉄骨梁構造は、本来低層でスパンの大き
いスーパーマーケツト等の建物等に有効利用するための
構造として提案されたもので、建物の剛性が小さい。図
８乃至図１３に示す柱、梁接合部は接合方式が複雑であ
って、柱、梁接合部の応力伝達機構が明快でない等の問
題がある。As a result of repeated loading tests assuming seismic forces on the partial frames of the columns and beam joints described above, excellent restoring force was obtained for the other columns and beam joints except for FIG. It exhibits characteristics and can be said to have excellent seismic performance. However, the RC column and steel beam structure is originally proposed as a structure for effectively utilizing a building such as a supermarket with a low rise and a large span, and the rigidity of the building is small. The column-beam joints shown in FIGS. 8 to 13 have complicated joining methods, and there is a problem that the stress transmission mechanism of the column-beam joints is not clear.

【０００６】また前記図７乃至図９に示す接合構造で
は、接合部内に梁フランジが直交しているために、コン
クリートの充填性に難があり、図７、図９では、接合部
内帯筋を４つ割りしたＬ型筋を梁ウエブに貫通して溶
接、組立をする必要があり、施工が難しい。また図８及
び図１０、１１並に図１２、１３では、ふさぎ板、梁フ
ランジの絞り込み、四角のパンドプレートの取付け、外
ダイヤフラムの鉄骨加工性、溶接施工性が難しく、更に
図１２、１３では、ダイヤフラムを柱外側に取付けるた
めに、階段廻り、外廻りなどの収りの詳細が難しい等の
問題点がある。In addition, in the joint structure shown in FIGS. 7 to 9, since the beam flanges are orthogonal to each other in the joint portion, it is difficult to fill the concrete. In FIGS. Construction is difficult because it is necessary to penetrate the beam web through the L-shaped streak divided into four and weld and assemble. Further, in FIGS. 8 and 10 and 11 as well as in FIGS. 12 and 13, it is difficult to narrow down the cover plate, the beam flange, attach the square band plate, and the steel workability and welding workability of the outer diaphragm. Further, in FIGS. Since the diaphragm is attached to the outside of the pillar, there is a problem that it is difficult to fit the details around the stairs and the outside.

【０００７】一方前記した建物の剛性の小さい点に関し
ては、耐震要素（ＲＣ造耐震壁、鉄骨ブレースなど）の
併用が考えられるが、耐震壁の場合には、付帯骨組との
接合方式が難しいのみならず、剛性が高すぎて、剛性及
び変形の調節がうまくいかない等の問題点がある。他
方、鉄骨ブレース取付けの場合には、柱、梁接合部への
ブレースの取付けが極めて難しい。これは図７乃至図９
に示す柱梁接合構造において顕著で、仮にブレースを取
付けたとしても極めて複雑な接合方式となり、また柱、
梁接合部での応力伝達が極めて不明瞭となり、剛性及び
耐力評価が難しい等での問題を有する。結局のところ耐
震壁併用の場合は、強度抵抗型の構造となり、また鉄骨
ブレース併用の場合は現在のところ、簡単で応力伝達が
明快な接合方式は提案されていない。従ってＲＣ柱、鉄
骨梁構造は、スパンが大きく取れるという長所を有する
反面、低層とならざるを得ないというのが現状である。On the other hand, with respect to the point that the rigidity of the building is small, it is conceivable to use a seismic resistant element (RC seismic resistant wall, steel brace, etc.) together. However, there is a problem that the rigidity is too high and the rigidity and the deformation cannot be properly adjusted. On the other hand, in the case of attaching a steel brace, it is extremely difficult to attach the brace to the joint between the column and the beam. This is shown in FIGS.
It is remarkable in the column-beam joint structure shown in Fig. 2, and even if the brace is attached, it becomes an extremely complicated joining method.
There is a problem in that the stress transmission at the beam joint becomes extremely unclear, and it is difficult to evaluate rigidity and yield strength. After all, in the case of combined use of earthquake resistant walls, a structure of strength resistance type is used, and in the case of combined use of steel braces, at present, no simple and simple stress transmission joining method has been proposed. Therefore, RC columns and steel beam structures have the advantage that they can have a large span, but at the present time they are inevitably low-rise.

【０００８】本発明は前記従来技術の有する問題点に鑑
みて提案されたもので、その目的とする処は、施工が簡
易で、応力の伝達が明快で、且つ鉄骨ブレースの取付け
が簡単で、架構の耐力、剛性の調節が容易であり、高層
建物にも有効利用が可能な鉄筋コンクリート柱と鉄骨梁
との接合部構造を提供する点にある。The present invention has been proposed in view of the problems of the above-mentioned prior art, and its object is to make the construction easy, the transmission of stress is clear, and the steel braces can be easily attached. The point is to provide a joint structure between a reinforced concrete column and a steel beam that can easily adjust the strength and rigidity of the frame and can be effectively used in high-rise buildings.

【０００９】[0009]

【課題を解決するための手段】前記の目的を達成するた
め、本発明に係る鉄筋コンクリート柱と鉄骨梁との接合
部構造は、十字縦形の鉛直スチフナが内蔵された角型鋼
管を、鉄筋コンクリート柱における柱、梁接合部に、鉄
骨梁の上下フランジよりスラブ厚程度を超える範囲まで
取付け、前記角型鋼管に鉄骨梁を接合して構成されてい
る。In order to achieve the above object, the joint structure of a reinforced concrete column and a steel frame beam according to the present invention is a rectangular steel pipe having a vertical vertical stiffener built in a reinforced concrete column. The column and beam joints are mounted to a range exceeding the slab thickness from the upper and lower flanges of the steel beam, and the steel beam is joined to the square steel pipe.

【００１０】請求項２の発明は前記十字縦形の鉛直スチ
フナを、前記角型鋼管における鉄骨梁のフランジを中心
とした部分にのみ配設して構成されている。請求項３の
発明は前記十字縦形の鉛直スチフナが内蔵された角型鋼
管を、鉄骨ブレースが収まる範囲まで延長して前記鉄筋
コンクリート柱に配設し、前記角型鋼管に鉄骨梁及び鉄
骨ブレースを接合して構成されている。According to a second aspect of the present invention, the vertical cross-shaped stiffener is arranged only in a portion of the square steel pipe centering on the flange of the steel frame beam. According to the invention of claim 3, a rectangular steel pipe having the vertical vertical stiffener of a cross shape is extended to a range in which a steel brace is accommodated and arranged on the reinforced concrete column, and a steel beam and a steel brace are joined to the rectangular steel pipe. Is configured.

【００１１】[0011]

【作用】本発明に係るＲＣ柱と鉄骨梁との接合部構造に
おいては前記したように、十字縦形の鉛直スチフナが内
蔵された強度、剛性の大きい角型鋼管が、ＲＣ柱におけ
る柱、梁接合部に鉄骨梁上下フランジよりスラブ厚程度
を超す範囲まで取付けられ、前記角型鋼管に鉄骨梁が接
合されているので、剛強な柱、梁接合部を介してＲＣ柱
と鉄骨梁との間の応力伝達が明快となり、構造設計がや
り易くなる。また前記のように十字縦形の鉛直スチフナ
が内蔵された角型鋼管をＲＣ柱に取付けるだけで柱、梁
接合部が構成されるので、施工が著しく容易になる。In the joint structure between the RC column and the steel beam according to the present invention, as described above, a rectangular steel pipe having a built-in vertical vertical stiffener with high strength and high rigidity is used to join the column and beam in the RC column. Since the steel beam is joined to the square-shaped steel pipe by being attached to the portion up to a range exceeding the slab thickness from the steel beam upper and lower flanges, the RC column and the steel beam are connected between the RC column and the steel beam through the rigid column and the beam joint. Stress transmission becomes clear, and structural design becomes easier. Further, as described above, since the column-beam joint is constructed only by attaching the square steel pipe having the vertical vertical stiffeners built thereinto to the RC column, the construction is remarkably facilitated.

【００１２】請求項２の発明は、前記十字縦形の鉛直ス
チフナを角型鋼管における鉄骨梁のフランジを中心とし
た部分にのみ配設し、柱、梁接合部に入るせん断力が小
さい場合、即ちはりフランジが小さい場合に適用される
ものである。請求項３の発明は、前記十字縦形の鉛直ス
チフナが内蔵された角型鋼管を鉄骨ブレースが収まる範
囲まで延長してＲＣ柱に配設したことによって、鉄骨ブ
レースの取付が容易に行なわれ、建物に作用する水平力
に対する建物の耐力、剛性の調節が容易になる。According to a second aspect of the present invention, the vertical vertical stiffener having a cross shape is disposed only in a portion of the square steel pipe centering on the flange of the steel beam, and when the shearing force entering the column-beam joint is small, that is, It is applied when the beam flange is small. According to the invention of claim 3, the square steel pipe having the vertical vertical stiffener built therein is extended to the range where the steel brace is accommodated and is arranged on the RC column, so that the steel brace is easily attached, and the building is constructed. It becomes easy to adjust the proof strength and rigidity of the building against the horizontal force acting on it.

【００１３】[0013]

【実施例】以下本発明を図示の実施例について説明す
る。図１及び図２に示す実施例において、ＡはＲＣ柱、
Ｂは鉄骨梁、Ｃは角型鋼管で、同角型鋼管Ｃに十字縦形
の鉛直スチフナ１が内蔵され、同スチフナ１を構成する
十字状の各部片の自由端部が角型鋼管Ｃの内周面に溶着
されている。The present invention will be described below with reference to the illustrated embodiments. In the embodiment shown in FIGS. 1 and 2, A is an RC column,
B is a steel beam, C is a square steel pipe, and a vertical cross-shaped vertical stiffener 1 is built in the same square steel pipe C, and the free ends of the cross-shaped parts forming the stiffener 1 are inside the square steel pipe C. It is welded to the peripheral surface.

【００１４】同角型鋼管ＣをＲＣ柱Ａにおける柱、梁接
合部に、鉄骨梁Ｂの上下フランジ２，２よりスラブＳ厚
ｔ程度超える範囲まで取付け、前記角型鋼管Ｃの外周面
に突設されたガセツトプレート３に、前記鉄骨梁Ｂのウ
エブ４をハイテンシヨンボルト５を介して接合する。図
中６は柱コンクリート、７は柱主筋である。図示の実施
例は前記したように、ＲＣ柱Ａにおける柱、梁接合部
に、十字縦形の鉛直スチフナ１が内蔵された強度、剛性
の大きい角型鋼管Ｃを一体に取付け、同角型鋼管Ｃのガ
セツトプレート３に鉄骨梁Ｂのウエブ４をハイテンシヨ
ンボルト５で接合するようにしたので、ＲＣ柱Ａと鉄骨
梁Ｂとの間の応力の伝達が確実に行なわれ、また柱、梁
接合部の施工が容易になる。The same-angled steel pipe C is attached to the column-beam joint of the RC column A up to a range exceeding the slab S thickness t from the upper and lower flanges 2 and 2 of the steel beam B, and projected onto the outer peripheral surface of the rectangular steel pipe C. The web 4 of the steel beam B is joined to the gusset plate 3 provided via a high tension bolt 5. In the figure, 6 is a column concrete, and 7 is a column main reinforcement. In the illustrated embodiment, as described above, a rectangular steel pipe C having a vertical vertical stiffener 1 having a cross-shaped vertical shape and having a large strength and rigidity is integrally attached to the column-beam joint portion of the RC column A, and the rectangular steel pipe C is connected. Since the web 4 of the steel beam B is joined to the gusset plate 3 by the high tension bolt 5, the stress is reliably transmitted between the RC column A and the steel beam B, and the column-beam connection is made. Construction of parts becomes easy.

【００１５】図３は本発明の他の実施例を示し、前記角
型鋼管Ｃにおける十字縦形の鉛直スチフナ１を、鉄骨梁
Ｂの上下フランジ２を中心とした部分にのみ配設したも
ので、柱、梁接合部に入力するせん断力が小さい場合、
即ち、鉄骨梁Ｂのフランジ２が小さい場合に適用され
る。図中前記実施例と均等部分には同一符号が付されて
いる。FIG. 3 shows another embodiment of the present invention, in which the vertical cross-shaped stiffener 1 in the square steel pipe C is arranged only at the portion centered on the upper and lower flanges 2 of the steel beam B. If the shear force applied to the column-beam joint is small,
That is, it is applied when the flange 2 of the steel beam B is small. In the figure, the same parts as those in the above embodiment are designated by the same reference numerals.

【００１６】なお鉄骨ブレースＤを取付ける場合は、前
記十字縦形の鉛直スチフナ１が内蔵された角型鋼管Ｃ′
を、前記鉄骨ブレースＤが収まる範囲まで延ばして、同
角型鋼管Ｃ′に鉄骨梁Ｂ及び前記鉄骨ブレースＤを容易
に接合しうるものであって、（図５参照）前記実施例に
よれば、建物に作用する地震力、風等の水平力に対す建
物の耐力、剛性の調節が容易になる。なお図６は骨組の
組立状態を示し、図中８は鉄骨小梁、その他前記実施例
と均等部分には同一符号が附されている。When mounting the steel braces D, a square steel pipe C'having the vertical stiffener 1 of the vertical cross-section is built in.
Is extended to a range in which the steel brace D fits, so that the steel beam B and the steel brace D can be easily joined to the rectangular steel pipe C ′ (see FIG. 5). , It becomes easy to adjust the proof strength and rigidity of the building against the seismic force acting on the building and horizontal force such as wind. FIG. 6 shows an assembled state of the frame. In the figure, 8 is a steel beam, and other parts equivalent to those in the above embodiment are designated by the same reference numerals.

【００１７】図４は前記各角型鋼管Ｃを組込んだプレキ
ヤスト鉄筋コンクリート柱Ａを示し、現場での施工をよ
り簡略化したものである。図中９は柱帯筋、１０は柱主
筋接合金物である。FIG. 4 shows a precast reinforced concrete column A in which the above-mentioned square steel pipes C are incorporated, and the construction at the site is further simplified. In the drawing, 9 is a columnar bar and 10 is a column main bar joint metal fitting.

【００１８】[0018]

【発明の効果】本発明に係るＲＣ柱と鉄骨梁の接合構造
は前記したように、十字縦形の鉛直スチフナが内蔵され
た強度、剛性の高い角型鋼管を、ＲＣ柱における柱、梁
接合部に、鉄骨梁上下フランジよりスラブ厚程度超える
範囲まで取付け、前記角型鋼管に鉄骨梁を接合したの
で、柱、梁接合部の施工が従来に比して簡単になり、
柱、梁間の応力の伝達が明快となり、構造設計、施工が
容易になる。As described above, the joint structure of the RC column and the steel beam according to the present invention comprises a rectangular steel pipe having a vertical and vertical cross-shaped stiffener and having a high strength and rigidity. In addition, since the steel frame beam is joined to the square steel pipe by attaching it to a range that exceeds the slab thickness from the steel beam upper and lower flanges, the construction of the pillar and beam joints becomes easier than before,
Clarification of stress transmission between columns and beams facilitates structural design and construction.

【００１９】請求項２の発明は前記角型鋼管における鉄
骨梁のフランジを中心とした部分にのみ、前記十字縦形
の鉛直スチフナを配設したことによって、柱、梁接合部
に入るせん断力が小さい場合に適用されるようにしたも
のである。請求項３の発明は、前記十字縦形の鉛直スチ
フナが内蔵された角型鋼管を鉄骨ブレースが収まる範囲
まで延ばしたことによって鉄骨ブレースの取付を簡略化
し、建物の水平力に対する耐力、剛性の調節を容易なら
しめ、高層建物に容易に適用できるようにしたものであ
る。According to a second aspect of the present invention, since the vertical cross-shaped stiffener is arranged only in the portion of the square steel pipe centering on the flange of the steel frame beam, the shear force entering the column-beam joint is small. It is adapted to the case. The invention of claim 3 simplifies the mounting of the steel brace by extending the square steel pipe having the built-in vertical vertical stiffener to the extent that the steel brace can be accommodated, and adjusts the proof strength and rigidity against the horizontal force of the building. It is designed so that it can be easily applied to high-rise buildings.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明に係る鉄筋コンクリート柱と鉄骨梁との
接合部構造の一実施例を示す正面図である。FIG. 1 is a front view showing an embodiment of a joint structure between a reinforced concrete column and a steel beam according to the present invention.

【図２】図１の平断面図である。FIG. 2 is a plan sectional view of FIG.

【図３】本発明の他の実施例を示す正面図である。FIG. 3 is a front view showing another embodiment of the present invention.

【図４】プレキヤスト化された鉄筋コンクリート柱を示
す正面図である。FIG. 4 is a front view showing a precast reinforced concrete column.

【図５】本発明に係る柱、梁接合構造を有する骨組の正
面図である。FIG. 5 is a front view of a frame having a column-beam joint structure according to the present invention.

【図６】骨組の組立方法を示す斜視図である。FIG. 6 is a perspective view showing a method of assembling a frame.

【図７】従来構造の１例を示す斜視図である。FIG. 7 is a perspective view showing an example of a conventional structure.

【図８】従来構造の他の例を示す斜視図である。FIG. 8 is a perspective view showing another example of a conventional structure.

【図９】従来構造の他の例を示す正面図である。FIG. 9 is a front view showing another example of the conventional structure.

【図１０】従来の構造の他の例を示す正面図である。FIG. 10 is a front view showing another example of the conventional structure.

【図１１】図１０の平面図である。11 is a plan view of FIG.

【図１２】従来構造の更に他の例を示す正面図である。FIG. 12 is a front view showing still another example of the conventional structure.

【図１３】図１２の平面図である。FIG. 13 is a plan view of FIG.

【符号の説明】[Explanation of symbols]

Ａ ＲＣ柱 Ｂ 鉄骨梁 Ｃ 角型鋼管 １ 鉛直スチフナ ２ 鉄骨梁のフランジ ３ ガセツトプレート ４ 鉄骨梁のウエブ ５ ハイテンシヨンボルト ６ 柱コンクリート ７ 柱主筋 A RC Column B Steel Beam C Square Steel Pipe 1 Vertical Stiffener 2 Steel Beam Flange 3 Gassted Plate 4 Steel Beam Web 5 High Tension Bolt 6 Column Concrete 7 Column Main Bar

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 十字縦形の鉛直スチフナが内蔵された角
型鋼管を、鉄筋コンクリート柱における柱、梁接合部
に、鉄骨梁の上下フランジよりスラブ厚程度を超える範
囲まで取付け、前記角型鋼管に鉄骨梁を接合してなるこ
とを特徴とする鉄筋コンクリート柱と鉄骨梁との接合部
構造。1. A rectangular steel pipe having a vertical vertical stiffener built in a cross shape is attached to a column-beam joint of a reinforced concrete column to a range exceeding the slab thickness from the upper and lower flanges of the steel beam, and the steel frame is attached to the rectangular steel pipe. A joint structure between a reinforced concrete column and a steel beam, which is characterized by joining beams. 【請求項２】 前記十字縦形の鉛直スチフナを、前記角
型鋼管における鉄骨梁のフランジを中心とした部分にの
み配設した請求項１記載の鉄筋コンクリート柱と鉄骨梁
との接合部構造。2. The joint structure between a reinforced concrete column and a steel beam according to claim 1, wherein the vertical cross-shaped stiffener is arranged only in a portion of the square steel pipe centering on a flange of the steel beam. 【請求項３】 前記十字縦形の鉛直スチフナが内蔵され
た角型鋼管を、鉄骨ブレースが収まる範囲まで延長して
前記鉄筋コンクリート柱に配設し、前記角型鋼管に鉄骨
梁及び鉄骨ブレースを接合した請求項１記載の鉄筋コン
クリート柱と鉄骨梁との接合部構造。3. A rectangular steel pipe having a built-in vertical vertical stiffener of a cross shape is extended to a range where a steel frame brace is accommodated and arranged on the reinforced concrete column, and a steel beam and a steel frame brace are joined to the rectangular steel pipe. A joint structure between a reinforced concrete column according to claim 1 and a steel beam.