JP3938035B2 - Flat slab structure - Google Patents
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- JP3938035B2 JP3938035B2 JP2002366130A JP2002366130A JP3938035B2 JP 3938035 B2 JP3938035 B2 JP 3938035B2 JP 2002366130 A JP2002366130 A JP 2002366130A JP 2002366130 A JP2002366130 A JP 2002366130A JP 3938035 B2 JP3938035 B2 JP 3938035B2
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【０００１】
【発明の属する技術分野】
本発明は、倉庫やビルなどに用いるフラットスラブに関し、特に、鋼管柱と床（スラブ）の接合が容易なものに関する。
【０００２】
【従来の技術】
フラットスラブは、梁ー床間のデッドスペースや床（スラブ）下面に突出する梁型を除くために用いられる床の一種で、柱に剛接するコンクリート床に梁の機能をもたせることを特徴とする。
【０００３】
床区画が複数となる場合は、隣接する床区画あるいは部材に対し横断的に配置した鉄筋に床コンクリートを打設し構造的に一体として構築するが、隣接する床同士が連続梁として機能し、床の負担モーメントが軽減するため、たわみ量が低減し、床の厚みを薄くすることも可能である。
【０００４】
フラットスラブに関しては、フラットスラブ２０１の床のせん断力を安定的に柱へ伝達させるため柱頭部にキャピタル２０２を設けた構造（図１０）や、施工性の向上に関して種々の提案がなされている。
【０００５】
特許文献１は、床と接合する柱の柱頭部に漏斗状鋼板を設けるもので、漏斗状鋼板はその表面が折り板状のため中心部ほど凹凸が深く、キャピタル部の応力状態に即応して補強が可能となることが記載されている。
【０００６】
特許文献２は、フラットスラブ構造物における鋼管柱とスラブの接合構造に関し、スラブのパンチング破壊を防止するため、せん断応力を支持する補強鉄板２０４を鋼管柱２０３に設け、該補強鉄板にはコンクリートと強固に付着するように鉄筋２０５を上下端に設けることが記載されている（図１１）。
【０００７】
特許文献３は、柱を充填型鋼管柱とした場合の施工性に優れたフラットスラブの構造に関し、隣接する柱間に設けた鉄骨梁で、現場打ちコンクリートで必要となる型枠を支持させ、スラブを形成することにより、スラブからの応力を鉄骨梁を介して柱に伝達し、キャピタルを不要とすることが記載されている。
【０００８】
【特許文献１】
特開平５−１８０３１号公報
【０００９】
【特許文献２】
特開平６−８８３９２号公報
【００１０】
【特許文献３】
特開２０００−２９７４９３号公報
【００１１】
【発明が解決しようとする課題】
しかしながら、特許文献２に記載の構造では、鋼管柱に補強鉄板を挿通させるための加工が必要で、補強鉄板自体にも鉄筋を挿入し、且つ鋼管柱内で直交させるための加工が必要となるなど施工性の低下が避けられない。
【００１２】
また、特許文献３には、スラブ構造における鉄筋の配筋に関して記載がなく、施工性やフラットスラブとしての利便性の観点から検討する余地が残されている。
【００１３】
そこで本発明ではフラットスラブとしての特質を損なうことなく、且つ、柱への複雑な加工を要せずに、スラブからの応力が柱に伝達されるフラットスラブ構造を提供することを目的とする。
【００１４】
【課題を解決するための手段】
本発明の課題は以下の手段により達成される。
１．隣接する鋼管柱間に掛け渡した鉄骨梁と上端筋と下端筋をコンクリートスラブ内に配置したフラットスラブ構造であって、フラットスラブから鋼管柱への応力伝達を前記上端筋と前記下端筋を鋼管柱に結合することなく、鋼管柱と鉄骨梁とが結合される仕口部により行い、前記仕口部は前記鉄骨梁の下フランジに対応して下ダイヤフラムを有し、前記下ダイヤフラムの下面には前記下ダイヤフラムと前記鋼管柱に結合する補助部材を有することを特徴とするフラットスラブ構造。
２．隣接する鋼管柱間に掛け渡した鉄骨梁と上端筋と下端筋をコンクリートスラブ内に配置したフラットスラブ構造であって、フラットスラブから鋼管柱への応力伝達を前記上端筋と前記下端筋を鋼管柱に結合することなく、鋼管柱と鉄骨梁とが結合される仕口部により行い、前記仕口部は、前記鉄骨梁の上下フランジに対応して上下ダイヤフラムを有し、前記上下ダイヤフラムは下ダイヤフラムの面積が上ダイヤフラムの面積より大きいことを特徴とするフラットスラブ構造。
３．鋼管柱と交差しないように、鉄骨梁上方に上端筋を配筋することを特徴とする１または２記載のフラットスラブ構造。
【００１５】
【発明の実施の形態】
以下、本発明に係るフラットスラブ構造を図面を用いて詳細に説明する。図１は本発明の一実施形態に係るフラットスラブ構造の仕口部を示す斜視図で、コンクリートスラブ１２中に鉄骨梁２と上端筋４、下端筋８を有することを特徴とする。図１（ａ）は上端筋の配筋を、図１（ｂ）は下端筋の配筋を説明する図である。
【００１６】
図１（ａ），（ｂ）において鋼管柱１と鉄骨梁２はダイアフラム３を介して固着され、鉄骨梁２はその鉄骨梁下フランジ７で床コンクリートが打設される型枠５を支持する。
【００１７】
鋼管柱１は円形または角型鋼管や内部にコンクリートが充填された充填型コンクリート柱（ＣＦＴ柱）であれば良く本発明では特に限定しない。
【００１８】
鉄骨梁２は隣接する鋼管柱１に掛け渡され、図１（ａ）（ｂ）は四方に配設されている状態を示す。
【００１９】
図１（ａ）において、鉄骨梁２の上方に上端筋４を配筋する。本発明では床コンクリートの荷重が鉄骨梁２により鋼管柱１に伝達されるため、鋼管柱１と交差する位置に上端筋４を配筋する必要がなく、上端筋４を鋼管柱１に接合または挿通しないため施工性が大幅に向上する。
【００２０】
図１（ｂ）において、鉄骨梁２を挿通して下端筋８を配筋する。本発明では床コンクリートの荷重が鉄骨梁２により鋼管柱１に伝達されるため、鋼管柱１と交差する位置に下端筋８を配筋する必要がなく、下端筋８を鋼管柱１に接合または挿通しないため施工性が大幅に向上する。
【００２１】
図２は下端筋の配筋を示し、コンクリートスラブ１２中で梁直交方向下端筋１１は鉄骨梁２のウエブに設けられた鉄筋挿通孔１０を挿通し、梁直交方向上端筋９は鉄骨梁２の上方に配筋される。
【００２２】
コンクリートスラブ１２中で、梁直交方向下端筋１１は圧縮鉄筋となるため、梁直交方向上端筋９の鉄筋量の半分以下とすることが可能で、鉄筋本数も少なくてすみ鉄筋挿通孔１０の加工による施工能率の低下は小さい。
【００２３】
下端筋８の配筋は、鋼管柱１と交差する部分の配筋を省略したり、配筋後、鋼管柱１に交差する部分を切断除去して行う。
【００２４】
図３は本発明に係るフラットスラブ構造の仕口部の一例を示すもので、鉄骨梁２は鋼管柱１のダイヤフラム３およびシアプレート２１を有するブラケット２０にボルト結合され、梁直交方向上端筋９は鉄骨梁上フランジ６の上方に、鋼管柱１と交差しないように配筋され、床コンクリート１３は鉄骨梁２を埋設するように打設されている。
【００２５】
本構造によれば、床が負担するせん断力は鉄骨梁のウエブ２２によりシアプレート２１を介して鋼管柱１に伝達される。床が負担する曲げによる偶力は、鉄骨梁のフランジよりダイヤフラム３を介して鋼管柱１に伝達される。
【００２６】
鉛直荷重作用時、鉄骨梁上フランジ６の存在応力は引張方向となるため、鉄骨梁上フランジ６とダイヤフラム３をボルト結合する。この際、鉄骨梁下フランジ７の存在応力は圧縮であるが、鉄骨梁下フランジ７とブラケット２０をボルト結合すると接合部の剛性・強度が向上する。
【００２７】
図４は本発明の他の実施形態に係るもので、仕口部の下ダイヤフラム３ｂの下面にキャピタルに相当する補助部材１４を設け、鉄骨梁２は鋼管柱１のブラケット２０にボルト結合する。
【００２８】
鉄骨梁２の上方に梁直交方向上端筋９を配筋し、床コンクリート１３を打設し、鉄骨梁とコンクリートスラブを一体化する。本実施形態によれば鉄骨梁端部の回転が抑制され、鉄骨梁のたわみが低減しスラブ全体のたわみも低減される。
【００２９】
下ダイヤフラム３ｂの上面にスタッドボルト等を取付けると下ダイヤフラム３ｂ，補助部材１４、鋼管柱１および床コンクリート１３の一体化が向上し、フラットスラブと鋼管柱１の接合がより強固となる。補助部材１４は三角形状、矩形状、逆台形状などであれば良く特に規定しない。
【００３０】
図５は本発明の他の実施形態に係るもので、（ａ）は斜視図、（ｂ）は上面図を示す。鋼管柱１に鉄骨梁２を取付けるため仕口部において鉄骨梁の上下フランジに対応して上ダイヤフラム３ａと下ダイヤフラム３ｂを設ける際、上ダイヤフラム３ａに対し、下ダイヤフラム３ｂの面積を広くし、下ダイヤフラム３ｂによって床荷重によるせん断力を鋼管柱１に伝達することを特徴とする。
【００３１】
床荷重によるせん断力に対する接合部耐力は、上ダイヤフラム３ａおよび下ダイヤフラム３ｂが鉛直上方に支えるスラブの厚みと、スラブ支持面の面積に依存するため、下ダイヤフラム３ｂのスラブ支持面積を広くすることで、接合部耐力が向上する。
【００３２】
下ダイヤフラム３ｂの下方に図４の補助部材１４を取付けると、下ダイヤフラム３ｂの垂れ下がりが防止でき、鋼管柱とスラブの接合強度が向上する。
【００３３】
上ダイヤフラム３ａを鉄骨梁のフランジ幅とほぼ等しくするとコンクリートを打設する際に、上ダイヤフラム３ａの下方での空隙発生が抑制される。尚、本発明によれば上ダイヤフラム３ａ，下ダイヤフラム３ｂはコンクリートスラブ１２内に収まるため、これらを設ける際の寸法上の制約が生じない。
【００３４】
図６は本発明の他の実施形態に係るフラットスラブ構造を示すもので、鉄骨梁２をその下フランジ７で型枠５を支持する型枠支持部材とすることを特徴とする。鉄骨梁上フランジ６の上方に梁直行方向上端筋９と上端筋４ａが配筋され、上端筋４ａは鋼管柱１と交差しないように配筋されている。
【００３５】
鉄骨梁２で床コンクリート１３が打設される型枠５を保持し、型枠５の上方に下端筋８ａと梁直行方向下端筋１１を配筋し、梁直交方向下端筋１１は鋼管柱１と交差しない。下端筋８ａを直交する鉄骨梁（図示しない）に挿通させる場合は図２に示すように鉄筋挿通孔を設ける。
【００３６】
図７は本発明の他の実施形態を示し、コンクリートを打設する際の固定荷重を支持するため、型枠としてトラスつき型枠１５を用いた場合を示す。トラス付き型枠１５は鉄筋トラス１５１ａ，１５１ｂ，１５１ｃ，型枠１５２を有し、鉄骨梁２により支持される。上端筋４ａは鉄骨梁の上方に、下端筋８ａは鉄筋トラス１５１ｂ，１５１ｃに交差して配筋する。本実施例によれば、型枠１５２を支保工（型枠用仮設材）で支持せずにコンクリートの打設が可能である。
【００３７】
図８は本発明の他の実施形態を示し、上端筋４ａ，梁直交方向上端筋９、下端筋８ａ、梁直交方向下端筋１１を配筋後、コンクリートを打設する際の固定荷重を支持するため、型枠５にトラス状の仮設梁１６を設けた場合を示す。
【００３８】
上述した本発明のいずれの実施形態においても、鉄骨梁の下フランジ幅を上フランジ幅より広くし、型枠の設置を容易とすることが可能であり、また、部材結合部はボルト結合を溶接とすることも可能である。
【００３９】
図９は本発明に係るフラットスラブ構造を床（スラブ）１７に用いた構造物の構造架構を示すもので、床（スラブ）１７と柱１８なる架構に水平抵抗要素としてブレース１９を配置する。
【００４０】
床（スラブ）１７は鉄骨梁２を有するため、構造架構は全て鉄骨部材となり、床（スラブ）に打設されるコンクリートの硬化を待たず、鉄骨架構の先行組上げが可能で工期が短縮される。鋼管柱がＣＦＴ柱の場合であってもコンクリートの硬化を待たず架構の自立が可能となる。
【００４１】
【発明の効果】
本発明によれば、鉄骨梁を横断して上端筋、下端筋の配筋が可能なため、床区画の構造的一体化が向上し、スパンを大きくしたり、スラブ厚を薄くすることが可能である。
【００４２】
また、構造架橋が全て鉄骨部材となり、床（スラブ）に打設されるコンクリートの効果を待たず、鉄骨架橋の先行組上げが可能で工期が短縮され、鋼管柱がＣＦＴ柱の場合であってもコンクリートの硬化を待たず架構自立が可能である。
【図面の簡単な説明】
【図１】本発明の一実施形態に係るフラットスラブ構造を模式的に示す図で（ａ）は上端筋の配筋を（ｂ）は下端筋の配筋を説明する図。
【図２】本発明の一実施形態に係るフラットスラブ構造における下端筋の配置を示す図。
【図３】本発明の一実施形態に係るフラットスラブ構造の仕口部を示す図。
【図４】本発明の他の実施形態に係るフラットスラブ構造の仕口部を示す図。
【図５】本発明の他の実施形態に係るフラットスラブ構造の仕口部を示す図で（ａ）は斜視図、（ｂ）は上面図を示す。
【図６】本発明の他の実施形態に係るフラットスラブ構造のスラブ断面を示す図。
【図７】本発明の他の実施形態に係るフラットスラブ構造のスラブ断面を示す図。
【図８】本発明の他の実施形態に係るフラットスラブ構造のスラブ断面を示す図。
【図９】本発明に係るフラットスラブ構造を用いた構造物の例を示す図。
【図１０】キャピタルを用いた鉄筋コンクリート造の従来例を示す図。
【図１１】補強鉄板を用いた従来例を示す図。
【符号の説明】
１ 鋼管柱
２ 鉄骨梁
３ ダイヤフラム
３ａ 通しダイヤフラム
３ｂ 外ダイヤフラム
４、４ａ 上端筋
５ 型枠
６ 鉄骨梁上フランジ
７ 鉄骨梁下フランジ
８、８ａ 下端筋
９ 梁直交方向上端筋
１０ 鉄筋挿通孔
１１ 梁直交方向下端筋
１２ コンクリートスラブ
１３ 床コンクリート
１４ 補助部材
１５ トラスつき型枠
１５１ａ，１５１ｂ，１５１ｃ 鉄筋トラス
１５２ 型枠
１６ 仮設梁
１７ 床（スラブ）
１８ 柱
１９ ブレース
２０ ブラケット
２１ シアプレート
２２ ウエブ
２０１ フラットスラブ
２０２ キャピタル
２０３ 鋼管柱
２０４ 補強鉄板
２０５ 鉄筋[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flat slab used for a warehouse, a building, or the like, and more particularly, to an easily connectable steel pipe column and a floor (slab).
[0002]
[Prior art]
A flat slab is a type of floor used to remove the dead space between the beam and the floor and the beam type protruding on the lower surface of the floor (slab). It is characterized by having a concrete floor rigidly attached to the column with the beam function. .
[0003]
When there are multiple floor sections, the floor concrete is placed on the reinforcing bars arranged transversely to the adjacent floor sections or members and constructed as a structural unit, but the adjacent floors function as continuous beams, Since the load moment on the floor is reduced, the amount of deflection is reduced, and the floor thickness can be reduced.
[0004]
Regarding the flat slab, various proposals have been made regarding a structure (FIG. 10) in which a capital 202 is provided on the column head in order to stably transmit the shearing force of the floor of the flat slab 201 to the column, and improvement in workability.
[0005]
In Patent Document 1, a funnel-shaped steel plate is provided at the head of a column to be joined to the floor, and the funnel-shaped steel plate has a folded plate surface, so that the unevenness is deeper in the center, and responds quickly to the stress state of the capital part. It is described that reinforcement is possible.
[0006]
Patent Document 2 relates to a joint structure between a steel pipe column and a slab in a flat slab structure. In order to prevent punching failure of the slab, a reinforcing iron plate 204 that supports shear stress is provided in the steel pipe column 203, and the reinforcing iron plate includes concrete and It is described that reinforcing bars 205 are provided at the upper and lower ends so as to adhere firmly (FIG. 11).
[0007]
Patent Document 3 relates to a structure of a flat slab excellent in workability when a column is a filled steel pipe column, and supports a formwork required for in-situ concrete with a steel beam provided between adjacent columns, It is described that by forming the slab, the stress from the slab is transmitted to the column via the steel beam, and no capital is required.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 5-18031
[Patent Document 2]
Japanese Patent Laid-Open No. 6-88392
[Patent Document 3]
Japanese Patent Laid-Open No. 2000-297493
[Problems to be solved by the invention]
However, in the structure described in Patent Document 2, it is necessary to process the steel pipe column to insert the reinforcing iron plate, and it is necessary to insert a reinforcing bar into the reinforcing steel plate itself and to make it orthogonal within the steel pipe column. Such deterioration of workability is inevitable.
[0012]
Further, Patent Document 3 does not describe the reinforcing bar arrangement in the slab structure, and leaves room for examination from the viewpoint of workability and convenience as a flat slab.
[0013]
Accordingly, an object of the present invention is to provide a flat slab structure in which the stress from the slab is transmitted to the column without impairing the characteristics of the flat slab and without requiring complicated processing on the column.
[0014]
[Means for Solving the Problems]
The object of the present invention is achieved by the following means.
1. It is a flat slab structure in which the steel beam spanned between adjacent steel pipe columns and upper and lower bars are arranged in the concrete slab. without binding to the column, carried out by Joint portion where the tubular columns steel beams are combined, the Joint portion has a lower diaphragm in response to the lower flange of the steel beam, on the lower surface of the lower diaphragm Has an auxiliary member coupled to the lower diaphragm and the steel pipe column .
2. It is a flat slab structure in which the steel beam spanned between adjacent steel pipe columns and upper and lower bars are arranged in the concrete slab. Without being connected to the column, a steel pipe column and a steel beam are connected by a joint part, and the joint part has an upper and lower diaphragm corresponding to the upper and lower flanges of the steel beam, and the upper and lower diaphragms are A flat slab structure characterized in that the area of the diaphragm is larger than the area of the upper diaphragm .
3. The flat slab structure according to 1 or 2, wherein an upper end bar is arranged above the steel beam so as not to intersect with the steel pipe column.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a flat slab structure according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a joint portion of a flat slab structure according to an embodiment of the present invention. The concrete slab 12 has a steel beam 2, upper end bars 4, and lower end bars 8. FIG. 1A is a view for explaining the arrangement of upper end bars, and FIG. 1B is a view for explaining the arrangement of lower end bars.
[0016]
1 (a) and 1 (b), a steel pipe column 1 and a steel beam 2 are fixed through a diaphragm 3, and the steel beam 2 supports a formwork 5 on which floor concrete is placed by a flange 7 below the steel beam. .
[0017]
The steel pipe column 1 is not particularly limited in the present invention as long as it is a circular or square steel pipe or a filled concrete column (CFT column) filled with concrete.
[0018]
The steel beam 2 is stretched over the adjacent steel pipe column 1, and Fig.1 (a) (b) shows the state arrange | positioned in four directions.
[0019]
In FIG. 1A, the upper end bars 4 are arranged above the steel beam 2. In the present invention, since the load of the floor concrete is transmitted to the steel pipe column 1 by the steel beam 2, it is not necessary to arrange the upper reinforcement 4 at a position intersecting with the steel pipe column 1, and the upper reinforcement 4 is joined to the steel pipe column 1 or Since it is not inserted, workability is greatly improved.
[0020]
In FIG. 1 (b), the bottom beam 8 is arranged through the steel beam 2. In the present invention, since the load of the floor concrete is transmitted to the steel pipe column 1 by the steel beam 2, there is no need to arrange the lower bar 8 at a position intersecting with the steel pipe column 1, and the lower bar 8 is joined to the steel pipe column 1 or Since it is not inserted, workability is greatly improved.
[0021]
FIG. 2 shows the bar arrangement of the lower end bars. In the concrete slab 12, the lower end bar 11 in the beam orthogonal direction passes through the reinforcing bar insertion hole 10 provided in the web of the steel beam 2, and the upper beam 9 in the beam orthogonal direction is the steel beam 2. The bar is arranged above.
[0022]
In the concrete slab 12, the lower beam reinforcement 11 in the beam orthogonal direction is a compression reinforcing bar, so that it can be less than half the amount of reinforcement in the beam orthogonal upper beam 9, and the number of reinforcing bars can be reduced and the rebar insertion hole 10 can be processed. The decrease in construction efficiency due to is small.
[0023]
The lower end reinforcement 8 is arranged by omitting the arrangement of the portion intersecting the steel pipe column 1 or cutting and removing the portion intersecting the steel tube column 1 after the arrangement.
[0024]
FIG. 3 shows an example of a joint portion of a flat slab structure according to the present invention. A steel beam 2 is bolted to a bracket 20 having a diaphragm 3 of a steel pipe column 1 and a shear plate 21, and an upper end bar 9 in the beam orthogonal direction. Is arranged above the steel beam upper flange 6 so as not to cross the steel pipe column 1, and the floor concrete 13 is placed so as to embed the steel beam 2.
[0025]
According to this structure, the shearing force borne by the floor is transmitted to the steel pipe column 1 via the shear plate 21 by the steel beam web 22. Coupled force caused by bending of the floor is transmitted to the steel pipe column 1 through the diaphragm 3 from the flange of the steel beam.
[0026]
When the vertical load is applied, the existing stress of the steel beam upper flange 6 is in the tensile direction, so the steel beam upper flange 6 and the diaphragm 3 are bolted together. At this time, the existing stress of the steel beam lower flange 7 is compression, but when the steel beam lower flange 7 and the bracket 20 are bolted together, the rigidity and strength of the joint portion are improved.
[0027]
FIG. 4 relates to another embodiment of the present invention. An auxiliary member 14 corresponding to capital is provided on the lower surface of the lower diaphragm 3 b of the joint, and the steel beam 2 is bolted to the bracket 20 of the steel pipe column 1.
[0028]
The upper beam 9 in the beam orthogonal direction is arranged above the steel beam 2 and the floor concrete 13 is placed to integrate the steel beam and the concrete slab. According to this embodiment, rotation of the steel beam end is suppressed, the deflection of the steel beam is reduced, and the deflection of the entire slab is also reduced.
[0029]
When a stud bolt or the like is attached to the upper surface of the lower diaphragm 3b, the integration of the lower diaphragm 3b, the auxiliary member 14, the steel pipe column 1 and the floor concrete 13 is improved, and the connection between the flat slab and the steel pipe column 1 becomes stronger. The auxiliary member 14 is not particularly defined as long as it has a triangular shape, a rectangular shape, an inverted trapezoidal shape, or the like.
[0030]
5A and 5B relate to another embodiment of the present invention, in which FIG. 5A is a perspective view and FIG. 5B is a top view. When the upper diaphragm 3a and the lower diaphragm 3b are provided corresponding to the upper and lower flanges of the steel beam at the joint for attaching the steel beam 2 to the steel pipe column 1, the area of the lower diaphragm 3b is increased relative to the upper diaphragm 3a. The diaphragm 3b transmits a shearing force due to a floor load to the steel pipe column 1.
[0031]
Since the joint strength against the shearing force due to floor load depends on the thickness of the slab that the upper diaphragm 3a and the lower diaphragm 3b support vertically upward and the area of the slab support surface, the slab support area of the lower diaphragm 3b is widened. , Joint strength is improved.
[0032]
When the auxiliary member 14 shown in FIG. 4 is attached below the lower diaphragm 3b, the lower diaphragm 3b can be prevented from drooping, and the joint strength between the steel pipe column and the slab is improved.
[0033]
When the upper diaphragm 3a is substantially equal to the flange width of the steel beam, the occurrence of voids below the upper diaphragm 3a is suppressed when placing concrete. According to the present invention, the upper diaphragm 3a and the lower diaphragm 3b are accommodated in the concrete slab 12, so that there is no dimensional restriction when these are provided.
[0034]
FIG. 6 shows a flat slab structure according to another embodiment of the present invention, and is characterized in that the steel beam 2 is used as a formwork support member that supports the formwork 5 with its lower flange 7. The upper beam 9 and the upper beam 4a are arranged above the steel beam upper flange 6, and the upper beam 4a is arranged so as not to intersect the steel pipe column 1.
[0035]
The formwork 5 on which the floor concrete 13 is placed is held by the steel beam 2, the lower end reinforcement 8 a and the beam direction lower end reinforcement 11 are arranged above the formwork 5, and the beam orthogonal direction lower end reinforcement 11 is the steel pipe column 1. Do not cross with. When the lower end reinforcement 8a is inserted through an orthogonal steel beam (not shown), a reinforcement insertion hole is provided as shown in FIG.
[0036]
FIG. 7 shows another embodiment of the present invention, and shows a case where a trussed formwork 15 is used as a formwork in order to support a fixed load when placing concrete. The truss-equipped mold 15 includes reinforcing bars truss 151 a, 151 b, 151 c and a mold 152, and is supported by the steel beam 2. The upper bar 4a is arranged above the steel beam, and the lower bar 8a is arranged so as to cross the reinforcing bars truss 151b and 151c. According to the present embodiment, it is possible to place concrete without supporting the formwork 152 with a support work (temporary material for formwork).
[0037]
FIG. 8 shows another embodiment of the present invention, and supports the fixed load when placing concrete after the upper end reinforcement 4a, the beam orthogonal upper end reinforcement 9, the lower end reinforcement 8a, and the beam orthogonal lower end reinforcement 11 are arranged. Therefore, a case where a truss-like temporary beam 16 is provided on the mold 5 is shown.
[0038]
In any of the embodiments of the present invention described above, it is possible to make the lower flange width of the steel beam wider than the upper flange width to facilitate the installation of the formwork, and the member connecting portion welds the bolt connection. It is also possible.
[0039]
FIG. 9 shows a structural frame of a structure using a flat slab structure according to the present invention for a floor (slab) 17, and a brace 19 is arranged as a horizontal resistance element on a frame consisting of a floor (slab) 17 and a pillar 18.
[0040]
Since the floor (slab) 17 has the steel beam 2, all the structural frames are steel members, and it is possible to assemble the steel frame in advance without waiting for the concrete placed on the floor (slab) to harden, thereby shortening the construction period. . Even if the steel pipe column is a CFT column, the frame can be independent without waiting for the concrete to harden.
[0041]
【The invention's effect】
According to the present invention, the upper and lower bars can be arranged across the steel beam, so that the structural integration of the floor section can be improved, the span can be increased, and the slab thickness can be reduced. It is.
[0042]
Also, all structural bridges become steel members, and without waiting for the effect of the concrete cast on the floor (slab), it is possible to assemble steel bridges in advance, shortening the work period, and even when the steel pipe column is a CFT column The frame can be independent without waiting for the concrete to harden.
[Brief description of the drawings]
FIGS. 1A and 1B are diagrams schematically showing a flat slab structure according to an embodiment of the present invention, wherein FIG. 1A is a diagram for explaining upper bar arrangement and FIG.
FIG. 2 is a diagram showing an arrangement of lower end bars in a flat slab structure according to an embodiment of the present invention.
FIG. 3 is a view showing a joint portion of a flat slab structure according to an embodiment of the present invention.
FIG. 4 is a view showing a joint portion of a flat slab structure according to another embodiment of the present invention.
5A is a perspective view, and FIG. 5B is a top view showing a joint part of a flat slab structure according to another embodiment of the present invention.
FIG. 6 is a view showing a slab cross section of a flat slab structure according to another embodiment of the present invention.
FIG. 7 is a view showing a slab cross section of a flat slab structure according to another embodiment of the present invention.
FIG. 8 is a view showing a slab cross section of a flat slab structure according to another embodiment of the present invention.
FIG. 9 is a view showing an example of a structure using a flat slab structure according to the present invention.
FIG. 10 is a view showing a conventional example of a reinforced concrete structure using capital.
FIG. 11 is a view showing a conventional example using a reinforcing iron plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Steel pipe pillar 2 Steel beam 3 Diaphragm 3a Through diaphragm 3b Outer diaphragm 4, 4a Upper end reinforcement 5 Formwork 6 Steel beam upper flange 7 Steel beam lower flange 8, 8a Lower end reinforcement 9 Beam orthogonal direction upper end reinforcement 10 Rebar insertion hole 11 Beam orthogonal Directional bottom reinforcement 12 Concrete slab 13 Floor concrete 14 Auxiliary member 15 Forms 151a, 151b, 151c with trusses Reinforcement truss 152 Form 16 Temporary beam 17 Floor (slab)
18 Column 19 Brace 20 Bracket 21 Shear plate 22 Web 201 Flat slab 202 Capital 203 Steel tube column 204 Reinforced iron plate 205 Reinforcing bar
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002366130A JP3938035B2 (en) | 2002-12-18 | 2002-12-18 | Flat slab structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002366130A JP3938035B2 (en) | 2002-12-18 | 2002-12-18 | Flat slab structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004197388A JP2004197388A (en) | 2004-07-15 |
| JP3938035B2 true JP3938035B2 (en) | 2007-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002366130A Expired - Fee Related JP3938035B2 (en) | 2002-12-18 | 2002-12-18 | Flat slab structure |
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| Country | Link |
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| JP (1) | JP3938035B2 (en) |
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| CN105002930A (en) * | 2015-07-16 | 2015-10-28 | 上海建工四建集团有限公司 | Beam column joint structure constructed through steel annular plate and method of beam column joint structure |
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| CN105002930A (en) * | 2015-07-16 | 2015-10-28 | 上海建工四建集团有限公司 | Beam column joint structure constructed through steel annular plate and method of beam column joint structure |
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| CN105780989A (en) * | 2016-01-21 | 2016-07-20 | 杨大刚 | Double beam floor structure |
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| JP2004197388A (en) | 2004-07-15 |
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