JP2015200097A - Steel plate for concrete mold - Google Patents

Steel plate for concrete mold Download PDF

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JP2015200097A
JP2015200097A JP2014079062A JP2014079062A JP2015200097A JP 2015200097 A JP2015200097 A JP 2015200097A JP 2014079062 A JP2014079062 A JP 2014079062A JP 2014079062 A JP2014079062 A JP 2014079062A JP 2015200097 A JP2015200097 A JP 2015200097A
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concrete
steel plate
column
reinforcing
formwork
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栄次 槇谷
Eiji Makitani
栄次 槇谷
一男 金綱
Kazuo Kanetsuna
一男 金綱
恭一 町田
Kyoichi Machida
恭一 町田
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Shinnihon Corp
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Shinnihon Corp
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Abstract

PROBLEM TO BE SOLVED: To improve the strength of a building frame by controlling the spreading of steel plates due to lateral pressure generated during concrete casting and improving the adhesive strength of concrete on the steel plates.SOLUTION: A permanent column mold 1A is constructed using a plurality of column steel plate units 10 made by assembling a plurality of column steel plates 11 and covering the outer surface with a fiber sheet F, and a column 1 is erected by casting concrete C in the column mold 1A. Vertical ribs 8 and horizontal ribs 9 that have first protrusions 81,91 and second protrusions 91,92 are formed along the edge of the column steel plate 11, and a reinforcing bar is fixed as a reinforcement on an inner surface 13 of a main plate 12.

Description

本発明は、主にビル等のコンクリート建造物の躯体を建造する際に用いて好適なコンクリート型枠用鋼板に関する。   The present invention relates to a steel sheet for concrete formwork that is suitable for use mainly in building a frame of a concrete structure such as a building.

鉄筋コンクリートあるいは鉄骨・鉄筋コンクリート造のビルにおける柱や梁等の躯体は、現場において躯体の外形に応じた型枠をコンクリート合板によって構築するとともに、型枠の内部に必要に応じて鉄筋や鉄骨を配設し、この状態から型枠の内部にコンクリートを打設してコンクリート養生後に型枠のコンクリート合板を除去するといった建造方法が知られている(特許文献1)。   For buildings such as columns and beams in buildings made of reinforced concrete or steel frames and reinforced concrete, formwork according to the outer shape of the building is constructed with concrete plywood at the site, and reinforcing bars and steel frames are installed inside the formwork as necessary. From this state, a construction method is known in which concrete is placed inside the formwork and the concrete plywood of the formwork is removed after curing the concrete (Patent Document 1).

しかし、このような従来工法では、型枠の除去が必要なため施工面において手間がかかるとともに工費の上昇を招き、また、コンクリート合板は通常ラワン材であり、原木を伐採して使用するため地球環境面で問題を有する。そこで、複数の鋼板を型枠として用い、コンクリート打設後はその鋼板を除去することなく永久的な型枠として躯体内に残すという工法が考えられた。このように鋼板をコンクリート型枠として用いれば、コンクリート合板の場合に生じていた上記問題はクリアされるとともに、鋼板が強度部材の一部となるため躯体強度の向上につながるという利点がある。   However, with this conventional method, it is necessary to remove the formwork, which is troublesome in terms of construction and increases the construction cost. Also, concrete plywood is usually lauan wood, which is used to cut and use raw wood. Has environmental problems. Therefore, a method has been considered in which a plurality of steel plates are used as a mold, and after the concrete is cast, the steel plates are left as permanent molds without being removed. When the steel plate is used as a concrete formwork in this way, the above-mentioned problems that have occurred in the case of concrete plywood are cleared, and there is an advantage that the steel plate becomes a part of the strength member and leads to an improvement in the strength of the frame.

特開2011−094476号公報JP 2011-094476 A

ところが、鋼板を用いて構築した型枠の内部にコンクリートを打設した際には、コンクリートの圧力が内側から外側に押す側圧となって鋼板を外側に押し広げるように働き、鋼板が外側に変形するふくれが生じるという不具合が生じやすい。また、鋼板の内面に対するコンクリートの付着力が低いことからコンクリートが鋼板から剥離するおそれがあり、鋼板による躯体の強度向上を阻害する面があった。   However, when concrete is placed inside a formwork constructed using steel plates, the concrete pressure acts as a side pressure that pushes from the inside to the outside and works to spread the steel plates outwards, and the steel plates deform outwards. The problem of blistering is likely to occur. Moreover, since the adhesive force of the concrete with respect to the inner surface of a steel plate is low, there exists a possibility that concrete may peel from a steel plate, and there existed a surface which obstruct | occluded the strength improvement of the housing by a steel plate.

本発明は上記事情に鑑みてなされたものであり、その主たる技術的課題は、コンクリートの打設時において生じる側圧による鋼板の広がりが抑えられるとともに、鋼板に対するコンクリートの付着強度を向上させて両者の一体化が促進されることによる躯体の強度向上が図られるコンクリート型枠用鋼板を提供することにある。   The present invention has been made in view of the above circumstances, and the main technical problem thereof is that the spread of the steel sheet due to the lateral pressure generated at the time of placing the concrete is suppressed, and the adhesion strength of the concrete to the steel sheet is improved and both of them are improved. An object of the present invention is to provide a steel plate for concrete formwork in which the strength of the frame is improved by promoting the integration.

本発明の請求項1に記載のコンクリート型枠用鋼板は、コンクリートによる躯体を建造または補強するにあたり、コンクリートの永久型枠として用いられる鋼板であって、コンクリートが接触する内面に、該内面から突出する補強材が設けられていることを特徴とする。   A concrete formwork steel sheet according to claim 1 of the present invention is a steel sheet used as a permanent formwork for concrete in building or reinforcing a concrete frame, and projects from the inner surface to which the concrete contacts. A reinforcing material is provided.

請求項1に記載のコンクリート型枠用鋼板によれば、補強材により鋼板が補強され、これによりコンクリート打設時において生じる側圧による鋼板の広がりが抑えられる。また、補強材がコンクリート内に埋設されることで補強材を介してコンクリートが鋼板に固着するアンカー効果が得られ、結果として鋼板に対するコンクリートの付着強度が向上して両者の一体化が促進され、躯体の強度向上が図られる。   According to the steel sheet for concrete form according to claim 1, the steel sheet is reinforced by the reinforcing material, and thereby the spread of the steel sheet due to the lateral pressure generated at the time of placing concrete is suppressed. In addition, the anchoring effect that the concrete is fixed to the steel plate through the reinforcing material by embedding the reinforcing material in the concrete is obtained, as a result, the adhesion strength of the concrete to the steel plate is improved and the integration of both is promoted, The strength of the housing is improved.

請求項1に記載の鋼板においては、前記補強材は鉄筋であって、複数の該鉄筋が前記内面に沿って水平方向および/または鉛直方向に延びる状態に前記鋼板に固着されている形態を含む(請求項2)。また、前記補強材は棒状あるいは板状であって、前記内面に立設される状態に該内面に固着されている形態を含む(請求項3)。   The steel plate according to claim 1, wherein the reinforcing material is a reinforcing bar, and includes a plurality of reinforcing bars fixed to the steel plate so as to extend in the horizontal direction and / or the vertical direction along the inner surface. (Claim 2). In addition, the reinforcing material is in a rod shape or a plate shape, and includes a form in which the reinforcing material is fixed to the inner surface in a state of standing on the inner surface.

次に、本発明の請求項4に記載のコンクリート型枠用鋼板は、コンクリートによる躯体を建造または補強するにあたり、複数を組み合わせることでコンクリートの永久型枠として用いられる鋼板であって、主板部と、該主板部の端部に形成されたリブとを有し、前記リブは、前記主板部から内側に突出する第1突出部と、該第1突出部からさらに内側に突出する第2突出部とを有することを特徴とする。   Next, the steel sheet for concrete formwork according to claim 4 of the present invention is a steel sheet used as a permanent formwork of concrete by combining a plurality when combining or reinforcing a concrete frame. A rib formed at an end of the main plate portion, wherein the rib protrudes inward from the main plate portion and a second protrusion further protrudes inward from the first protrusion portion. It is characterized by having.

請求項4に記載のコンクリート型枠用鋼板によれば、リブにより鋼板が補強され、これによりコンクリート打設時において生じる側圧による鋼板の広がりが抑えられる。また、リブがコンクリート内に埋設されることでリブによるアンカー効果が得られ、結果として鋼板に対するコンクリートの付着強度が向上して両者の一体化が促進され、躯体の強度向上が図られる。特にリブは第2突出部があることで鋼板の内面から離間する方向へのコンクリートの動きが阻止され、コンクリートと鋼板との一体化が強固に保持される。   According to the steel sheet for concrete formwork according to claim 4, the steel sheet is reinforced by the ribs, and thereby the spread of the steel sheet due to the lateral pressure generated during the concrete placing is suppressed. Moreover, the anchor effect by a rib is acquired because a rib is embed | buried in concrete, As a result, the adhesion strength of the concrete with respect to a steel plate improves, integration of both is accelerated | stimulated, and the intensity | strength improvement of a housing is achieved. In particular, since the rib has the second projecting portion, the movement of the concrete in the direction away from the inner surface of the steel plate is prevented, and the integration of the concrete and the steel plate is firmly held.

請求項4に記載の鋼板においては、前記第1突出部は前記主板部に対し略直角に屈曲して突出し、前記第2突出部は前記第1突出部に対し略直角に屈曲して突出している形態を含む(請求項5)。   5. The steel plate according to claim 4, wherein the first protruding portion is bent and protruded at a substantially right angle with respect to the main plate portion, and the second protruding portion is bent and protruded at a substantially right angle with respect to the first protruding portion. (Claim 5).

本発明によれば、コンクリートの打設時に生じる側圧による鋼板の広がりが抑えられるとともに、鋼板に対するコンクリートの付着強度が向上して両者の一体化が促進されることによる躯体の強度向上が図られるコンクリート型枠用鋼板が提供されるといった効果を奏する。   According to the present invention, the spread of the steel plate due to the side pressure generated during the placement of the concrete is suppressed, and the strength of the frame is improved by improving the adhesion strength of the concrete to the steel plate and promoting the integration of both. There exists an effect that the steel plate for formwork is provided.

本発明の一実施形態に係る躯体である柱を示す側面図である。It is a side view which shows the pillar which is a housing concerning one Embodiment of this invention. 一実施形態の柱の一部破断側面図である。It is a partially broken side view of the pillar of one Embodiment. 一実施形態の柱の横断面図である。It is a cross-sectional view of the pillar of one Embodiment. 一実施形態の柱鋼板ユニットを示す横断面図であって、(a)は柱鋼板がコ字状の場合、(b)は柱鋼板がL字状の場合を示す。It is a cross-sectional view which shows the column steel plate unit of one Embodiment, Comprising: (a) shows the case where a column steel plate is U shape, (b) shows the case where a column steel plate is L shape. 一実施形態の柱鋼板の縦リブを示す断面図であって、(a)縦リブどうしが直接当接している状態、(b)縦リブ間に粘弾性部材を挟んだ状態を示している。It is sectional drawing which shows the vertical rib of the column steel plate of one Embodiment, Comprising: (a) The state where the vertical ribs contact | abut directly, (b) The state which pinched | interposed the viscoelastic member between the vertical ribs is shown. 一実施形態の柱鋼板の横リブを示す断面図であって、(a)横リブどうしが直接当接している状態、(b)横リブ間に粘弾性部材を挟んだ状態を示している。It is sectional drawing which shows the horizontal rib of the column steel plate of one Embodiment, Comprising: (a) The state which the horizontal rib contact | abuts directly, (b) The state which pinched | interposed the viscoelastic member between horizontal ribs is shown. 一実施形態の柱鋼板の内側を示す斜視図である。It is a perspective view which shows the inner side of the pillar steel plate of one Embodiment. 他の実施形態の柱鋼板の斜視図である。It is a perspective view of the pillar steel plate of other embodiments. さらに他の実施形態の柱鋼板の斜視図である。It is a perspective view of the pillar steel plate of other embodiment.

図1は、本発明の一実施形態に係るコンクリート型枠用鋼板を用いて建造された躯体である柱1を示している。以下、柱1の建造後の構造と、それら構造を得る施工方法について説明する。   FIG. 1 shows a pillar 1 that is a frame constructed using a steel sheet for concrete formwork according to an embodiment of the present invention. Hereinafter, the structure after construction of the pillar 1 and the construction method for obtaining the structure will be described.

[1]柱の構造
図2および図3に示すように、柱1は横断面が正方形状であって、複数の柱鋼板ユニット10が下から上に積層されてなる永久的な柱型枠1Aの内部に、上下に延びる補強用の鉄筋篭100が配筋されるとともにコンクリートCが打設された構造を有している。鉄筋篭100は、柱型枠1Aの内面に近接して設けられて上下に延びる複数の主筋101と、これら主筋101の外側に上下方向に等間隔をおいて緊結される複数の帯筋102とから構成される。
[1] Column Structure As shown in FIGS. 2 and 3, the column 1 has a square cross section, and a permanent column mold 1A in which a plurality of column steel plate units 10 are stacked from the bottom to the top. The reinforcing steel bar 100 for reinforcement extending vertically is arranged inside and the concrete C is placed. The reinforcing bar rod 100 is provided in the vicinity of the inner surface of the columnar frame 1A and extends vertically, and a plurality of reinforcing bars 102 that are fastened to the outside of the main bars 101 at equal intervals in the vertical direction. Consists of

柱型枠1Aを構成する柱鋼板ユニット10は、図4(a)に示すように、柱1の外形形状に対応した形状の複数の柱鋼板(コンクリート型枠用鋼板)11が組み合わされ、これら柱鋼板11の外面全面に繊維シートFが巻かれて被覆されてなるものである。柱鋼板11は、長方形状の鋼板素材の長手方向両端側の2箇所を同じ方向に直角に折り曲げ加工してコ字状に形成した主板部12を主体とするもので、2枚1組で、両端どうしを対向させることで矩形状の柱の断面形状に対応した上下方向に開口する平面視正方形の箱状に組み合わされる。   As shown in FIG. 4A, the column steel plate unit 10 constituting the column mold 1A is a combination of a plurality of column steel plates (concrete steel plates) 11 having a shape corresponding to the outer shape of the column 1. A fiber sheet F is wound around and coated on the entire outer surface of the column steel plate 11. The column steel plate 11 is mainly composed of a main plate portion 12 formed in a U-shape by bending two portions on both ends in the longitudinal direction of a rectangular steel plate material at right angles to the same direction. By making both ends face each other, they are combined into a square box shape in plan view that opens in the vertical direction corresponding to the cross-sectional shape of the rectangular column.

柱鋼板11の寸法は柱1の寸法に応じて適宜に設定されるが、例えば厚さが1.6〜3.2mm程度、上下方向の高さが例えば300〜600mm程度のものが用いられる。図5(a)に示すように、柱鋼板11における主板部12の幅方向(水平方向)の両端側縁には、内側に突出する縦リブ8が、その側端部の全長にわたって形成されている。また、図6(a)に示すように、柱鋼板11の上下の端縁には、内側に突出する横リブ9が、それら端縁の全長にわたって形成されている。   The dimensions of the pillar steel plate 11 are appropriately set according to the dimensions of the pillar 1. For example, a steel sheet having a thickness of about 1.6 to 3.2 mm and a vertical height of about 300 to 600 mm is used. As shown to Fig.5 (a), the longitudinal rib 8 which protrudes inside is formed in the both ends side edge of the width direction (horizontal direction) of the main board part 12 in the column steel plate 11 over the full length of the side edge part. Yes. Moreover, as shown to Fig.6 (a), the horizontal rib 9 which protrudes inside is formed in the up-and-down edge of the column steel plate 11 over the full length of these edges.

縦リブ8は、主板部12から内側に直角に屈曲して突出形成された第1突出部81と、第1突出部81からさらに内側に直角に屈曲して突出形成された第2突出部82とを有する2段屈曲構造である。一方、横リブ9も同様の2段屈曲構造であって、主板部12から内側に直角に屈曲して形成された第1突出部91と、第1突出部91からさらに内側に直角に屈曲して形成された第2突出部92とを有する。   The vertical ribs 8 are formed to protrude from the main plate portion 12 by being bent at right angles to the inside, and the second protrusion portions 82 are formed to be bent at a right angle from the first protrusion portion 81 to be protruded. Is a two-stage bent structure. On the other hand, the horizontal rib 9 has a similar two-stage bent structure, and is bent at a right angle inward from the main plate portion 12 and is bent at a right angle further inward from the first protrusion 91. And a second projecting portion 92 formed.

縦リブ8および横リブ9の各突出部81・82、91・92は、主板部12の端部を折り曲げ加工することによって形成される。縦リブ8および横リブ9の幅は、例えば20〜100mm程度である。各突出部81・82、91・92の幅は、図示例ではそれぞれ第1突出部81,91の方が第2突出部82,92よりもやや大きい寸法となっているが、寸法はこれに限定されず、必要に応じて適宜に設定される。   The protrusions 81, 82, 91, 92 of the vertical rib 8 and the horizontal rib 9 are formed by bending the end portion of the main plate portion 12. The width of the vertical rib 8 and the horizontal rib 9 is, for example, about 20 to 100 mm. The width of each of the protrusions 81, 82, 91, and 92 is slightly larger than the second protrusions 82 and 92 in the illustrated example. It is not limited, and is set appropriately as necessary.

図3および図7に示すように、柱鋼板11の主板部12の内面13には、内面13に沿って複数の鉄筋51が固着されている。鉄筋51は、真っ直ぐな素材鉄筋を直角に折り曲げ加工して得られ、この場合、柱鋼板11の幅方向と平行に延び、かつ、主板部12の内面13の両端にわたる長さを有しており、上下に等間隔をおいて複数本が内面13に例えばスポット溶接等の手段で固着されている。鉄筋51は、その外径分が内面13から突出していることになる。鉄筋51の径は適宜に洗濯されるが、例えば直径が10〜25mm程度のものが用いられる。   As shown in FIGS. 3 and 7, a plurality of reinforcing bars 51 are fixed to the inner surface 13 of the main plate portion 12 of the pillar steel plate 11 along the inner surface 13. The reinforcing bar 51 is obtained by bending a straight material reinforcing bar at a right angle. In this case, the reinforcing bar 51 extends in parallel with the width direction of the column steel plate 11 and has a length over both ends of the inner surface 13 of the main plate portion 12. A plurality of wires are fixed to the inner surface 13 by means such as spot welding at equal intervals in the vertical direction. The reinforcing bar 51 has an outer diameter protruding from the inner surface 13. The diameter of the reinforcing bar 51 is appropriately washed. For example, a diameter of about 10 to 25 mm is used.

2枚の柱鋼板11を箱状に組み合わせて柱鋼板ユニット10を構成する際には、縦リブ8の第1突出部81どうしを直接当接させ、この状態をクリップ等によって互いに摺動可能な程度に仮止めして接合状態を保持する。   When the column steel plate unit 10 is configured by combining the two column steel plates 11 in a box shape, the first protrusions 81 of the vertical ribs 8 are brought into direct contact with each other, and this state can be slid by a clip or the like. Temporarily fix to the extent and keep the joined state.

なお、図3、図4(a)、図7に示した柱鋼板11はコ字状に形成され、2枚1組で柱鋼板ユニット10が構成されるが、図4(b)に示すように、柱鋼板11をL字状のものとし、これを4枚1組で柱1の断面形状に組んで柱鋼板ユニット10を構成してもよい。このようなL字状の柱鋼板11の場合も、第1突出部81、第2突出部82を有する縦リブ8、および第1突出部91、第2突出部92を有する横リブ9が形成されるとともに、主板部12の内面13に複数の水平方向に延びる鉄筋51が固着される。   The steel plate 11 shown in FIGS. 3, 4 (a), and 7 is formed in a U shape, and the steel plate unit 10 is composed of a pair of two steel plates, but as shown in FIG. 4 (b). In addition, the column steel plate 11 may be L-shaped, and the column steel plate unit 10 may be configured by assembling the four steel plates 11 into a cross-sectional shape of the column 1 in one set. Also in the case of such an L-shaped column steel plate 11, the longitudinal rib 8 having the first projecting portion 81 and the second projecting portion 82, and the lateral rib 9 having the first projecting portion 91 and the second projecting portion 92 are formed. At the same time, a plurality of horizontal reinforcing bars 51 are fixed to the inner surface 13 of the main plate portion 12.

繊維シートFは、例えば帯状に加工した連続するシート状繊維に接着剤を含浸させたものを柱鋼板ユニット10の外面にテンションを付与しながら巻き付ける手法が好適である。このようにすると1枚の長い繊維シートFを柱鋼板ユニット10の表面全面に容易に張ることができ、含浸する接着剤によって巻き付けと同時に柱鋼板11の外面に接着させることができる。   As the fiber sheet F, for example, a method in which a continuous sheet-like fiber processed into a strip shape is impregnated with an adhesive is wound while applying tension to the outer surface of the column steel plate unit 10. In this way, one long fiber sheet F can be easily stretched over the entire surface of the column steel plate unit 10, and can be bonded to the outer surface of the column steel plate 11 simultaneously with winding with the impregnating adhesive.

繊維シートFの繊維材料は、例えばポリエチレン、カーボン、ガラス、ビニロン、アラミド等からなるものが挙げられるが、耐アルカリ性に優れたポリエチレンおよびカーボンが好適とされる。   Examples of the fiber material of the fiber sheet F include polyethylene, carbon, glass, vinylon, aramid, and the like, and polyethylene and carbon excellent in alkali resistance are preferable.

[2]柱の施工方法
次に、柱1を建造する施工方法を説明する。
上記のように、2枚の柱鋼板11を、両端の縦リブ8の第1突出部81どうしを当接させて箱状に組み合わせ、これら柱鋼板11の外面全面に繊維シートFを巻いて被覆した複数の柱鋼板ユニット10を、下層階の床スラブ上に順に積層して永久的な柱型枠1Aを構築する。柱型枠1Aを構築する際には、図6(a)に示すように、下側の柱鋼板11の横リブ9の第1突出部91に上側の柱鋼板11の横リブ9の第1突出部91を載置して重ね合わせ、上下の横リブ9の第1突出部91が直接面接触した状態とする。
[2] Column Construction Method Next, a method for constructing the column 1 will be described.
As described above, the two column steel plates 11 are combined in a box shape by bringing the first protrusions 81 of the longitudinal ribs 8 at both ends into contact with each other, and the fiber sheet F is wrapped around the entire outer surface of the column steel plates 11 to cover them. A plurality of column steel plate units 10 are sequentially laminated on the floor slab of the lower floor to construct a permanent column mold 1A. When constructing the column form frame 1A, as shown in FIG. 6A, the first protrusion 91 of the horizontal rib 9 of the lower column steel plate 11 projects the first rib 91 of the upper column steel plate 11 from the first. The protrusions 91 are placed and overlapped, and the first protrusions 91 of the upper and lower horizontal ribs 9 are in direct surface contact.

このように下側の柱鋼板ユニット10における各柱鋼板11の上端の横リブ9の第1突出部91に、上側の柱鋼板ユニット10における各柱鋼板11の下端の横リブ9の第1突出部91を載置して重ねながら、複数の柱鋼板ユニット10を多段に積層し、柱1の永久的な柱型枠1Aを構築する。なお、積層した柱鋼板ユニット10は、重ねた横リブ9どうしをクリップ等で互いに摺動可能な程度に仮止めして保持し、上下の柱鋼板ユニット10のずれを抑える。   As described above, the first protrusions 91 of the lower ribs 9 of the column steel plates 11 in the upper column steel plate unit 10 are projected to the first protrusions 91 of the upper ribs 9 of the column steel plates 11 of the lower column steel plate unit 10. A plurality of column steel plate units 10 are stacked in multiple stages while the portion 91 is placed and stacked, and a permanent column mold 1 </ b> A of the column 1 is constructed. Note that the stacked columnar steel plate units 10 temporarily hold the stacked horizontal ribs 9 so as to be slidable with clips or the like, and suppress the displacement of the upper and lower column steel plate units 10.

また、柱型枠1A内に、補強用の鉄筋篭100を配筋する。鉄筋篭100の配筋は柱鋼板ユニット10の積層とともに適宜行い、例えば先に主筋101を立てるとともに下から帯筋102を主筋101に緊結するか、予め組み立てた鉄筋篭100を柱型枠1Aの中に上から落とし込んで配筋し、柱鋼板ユニット10を、配筋した鉄筋篭100の周囲に順次積層させるなどの方法が採られる。   Further, reinforcing bar rods 100 for reinforcement are arranged in the column mold 1A. The reinforcing bar 100 is appropriately arranged together with the stacking of the column steel plate units 10, and for example, the main bar 101 is erected first and the band 102 is fastened to the main bar 101 from the bottom, or the pre-assembled reinforcing bar 100 is attached to the column mold 1A. For example, a method is adopted in which the steel plate unit 10 is dropped from above to arrange the bars, and the column steel plate units 10 are sequentially stacked around the reinforcing bar 100.

次に、鉄筋篭100が配筋された柱型枠1A内にコンクリートCを充填して打設し、コンクリートCを養生させる。コンクリートCは柱鋼板11の内面13に接触し、また、鉄筋51はコンクリートC内に埋設される。   Next, concrete C is filled and placed in the column mold 1A in which the reinforcing bar 100 is arranged, and the concrete C is cured. The concrete C contacts the inner surface 13 of the column steel plate 11, and the reinforcing bar 51 is embedded in the concrete C.

[3]実施形態の作用効果
上記のようにして建造された柱1においては、柱鋼板11を永久型枠として残すためこれら柱鋼板11が強度部材となり、また、柱鋼板11の外面に繊維シートFが接着されているため、曲げ抵抗、剪断抵抗、靱性といった各種強度が向上するとともに、軸方向耐力が向上する。
[3] Effect of Embodiment In the column 1 constructed as described above, the column steel plate 11 becomes a strength member in order to leave the column steel plate 11 as a permanent formwork, and a fiber sheet is formed on the outer surface of the column steel plate 11. Since F is bonded, various strengths such as bending resistance, shear resistance, and toughness are improved, and axial strength is improved.

特に、柱鋼板11においては、主板部12の内面13に複数本の鉄筋51が固着されたことにより補強され、これによりコンクリートCの打設時において生じる側圧による外側への広がりが抑えられる。また、鉄筋51がコンクリートC内に埋設されることで、鉄筋51を介してコンクリートCが柱鋼板11に固着するアンカー効果が得られ、結果として柱鋼板11に対するコンクリートCの付着強度が向上して両者の一体化が促進され、柱1の強度向上が図られる。   In particular, the pillar steel plate 11 is reinforced by the fact that a plurality of reinforcing bars 51 are fixed to the inner surface 13 of the main plate portion 12, thereby suppressing the outward spread due to the side pressure generated when the concrete C is placed. Further, by embedding the reinforcing bar 51 in the concrete C, an anchor effect that the concrete C is fixed to the column steel plate 11 through the reinforcing bar 51 is obtained, and as a result, the adhesion strength of the concrete C to the column steel plate 11 is improved. Integration of both is promoted, and the strength of the pillar 1 is improved.

また、柱鋼板11は縦リブ8および横リブ9によっても補強され、コンクリートCの打設時において生じる側圧による柱鋼板11の広がりが抑えられる。また、縦リブ8および横リブ9がコンクリートC内に埋設されることで縦リブ8および横リブ9によるアンカー効果が得られ、結果として柱鋼板11に対するコンクリートCの付着強度が向上して両者の一体化が促進され、柱1の強度向上が図られる。特に横リブ9に第2突出部92があることで柱鋼板11の内面13から離間する方向へのコンクリートCの動きが阻止され、コンクリートCと柱鋼板11との一体化が強固に保持される。   Further, the column steel plate 11 is also reinforced by the vertical ribs 8 and the horizontal ribs 9, and the spread of the column steel plate 11 due to the lateral pressure generated when the concrete C is placed is suppressed. Further, the vertical ribs 8 and the horizontal ribs 9 are embedded in the concrete C, so that the anchor effect by the vertical ribs 8 and the horizontal ribs 9 is obtained. As a result, the adhesion strength of the concrete C to the column steel plate 11 is improved, Integration is promoted, and the strength of the pillar 1 is improved. In particular, the presence of the second protrusion 92 in the lateral rib 9 prevents the movement of the concrete C in the direction away from the inner surface 13 of the column steel plate 11, and the integration of the concrete C and the column steel plate 11 is firmly maintained. .

また、地震等で大きな力を受けた場合においては、接触している縦リブ8間および横リブ9間に摩擦が生じ、この摩擦力が振動を抑制するダンパーとなる。このため地震力に対する制震効果が、次のように発揮される。   Further, when a large force is received due to an earthquake or the like, friction is generated between the contacting vertical ribs 8 and the horizontal ribs 9, and this friction force becomes a damper that suppresses vibration. For this reason, the seismic control effect against the seismic force is demonstrated as follows.

すなわち、横リブ9間においては、水平方向に揺れる地震力を受けると、柱鋼板11が横方向に個々に移動したり、変形(剪断変形と呼ばれる)したりし、横リブ9が相対変位して第1突出部91どうしが擦れ合い、両者の間に摩擦が生じる。この場合の摩擦力は、上側の柱鋼板11の横リブ9から下側の柱鋼板11のリブ9にかかる荷重に応じたものとなるが、下側のリブ9はその荷重を上側のリブ9から直接受けるため、下側のリブ9が受ける荷重は大きい。このため地震力に抗する摩擦力も大きなものとなり、その摩擦力がダンパーとなって水平方向への鋼板11の移動が抑制され、制震効果が顕著に得られる。   That is, between the horizontal ribs 9, when subjected to a seismic force that shakes in the horizontal direction, the column steel plates 11 individually move in the horizontal direction or deform (called shear deformation), and the horizontal ribs 9 are relatively displaced. Thus, the first protrusions 91 rub against each other, and friction is generated between them. The frictional force in this case corresponds to the load applied from the lateral rib 9 of the upper column steel plate 11 to the rib 9 of the lower column steel plate 11, and the lower rib 9 applies the load to the upper rib 9. The load that the lower rib 9 receives is large because it is received directly from the bottom. For this reason, the frictional force against the seismic force becomes large, the frictional force becomes a damper, the movement of the steel plate 11 in the horizontal direction is suppressed, and the seismic control effect is remarkably obtained.

一方、地震によって上下方向に揺れる地震力を受けると、柱鋼板11は上下方向に個々に移動したり、また変形(上記の剪断変形)したりし、縦リブ8が相対変位して第1突出部81が互いに擦れ合い、両者の間に摩擦が生じる。このように当接する縦リブ8の第1突出部81間に発生する摩擦力がダンパーとなって上下方向への柱鋼板11の移動が抑制され、制震効果が顕著に得られる。   On the other hand, when receiving an earthquake force that shakes in the vertical direction due to an earthquake, the column steel plates 11 move individually in the vertical direction or are deformed (the above-described shear deformation), and the vertical ribs 8 are relatively displaced and the first protrusions are caused. The portions 81 rub against each other, and friction occurs between them. The frictional force generated between the first protrusions 81 of the vertical ribs 8 that contact in this way becomes a damper, and the movement of the column steel plate 11 in the vertical direction is suppressed, and the vibration control effect is remarkably obtained.

また、地震等で大きな力を受け、柱鋼板11とともに縦リブ8および横リブ9が動く場合においては、縦リブ8とコンクリートCとの間、あるいは横リブ9とコンクリートCとの間にも摩擦が生じる場合があり、この摩擦力が、振動を抑制するダンパーとなって地震力に対する制震効果が発揮される。   Further, when the vertical rib 8 and the horizontal rib 9 move together with the column steel plate 11 due to a large force due to an earthquake or the like, friction is also generated between the vertical rib 8 and the concrete C or between the horizontal rib 9 and the concrete C. This frictional force acts as a damper that suppresses vibration, and exhibits a seismic control effect against seismic force.

なお、上記実施形態では、縦リブ8の第1突出部81どうし、横リブ9の第1突出部91どうしを直接接触させた状態としているが、図5(b)、図6(b)に示すように、第1突出部81間、第1突出部8間に粘弾性部材6を挟んだ状態としてもよい。粘弾性部材6としては、例えば天然ゴム、合成ゴム等のゴムを材料としたものが用いられる。このように縦リブ8間や横リブ9間に粘弾性部材6を挟むと、地震等によって振動を受けた際に、粘弾性部材6によって粘弾性ダンパー効果が生じ、制震性が効果的に発揮される。このため、揺れを減衰させて揺れを早く抑えたり、揺れを小さくしたりする効果を得る。   In the above-described embodiment, the first protrusions 81 of the vertical ribs 8 and the first protrusions 91 of the horizontal ribs 9 are in direct contact with each other, but FIG. 5B and FIG. As shown, the viscoelastic member 6 may be sandwiched between the first protrusions 81 and between the first protrusions 8. As the viscoelastic member 6, for example, a material made of rubber such as natural rubber or synthetic rubber is used. When the viscoelastic member 6 is sandwiched between the vertical ribs 8 and the horizontal ribs 9 in this way, the viscoelastic member 6 produces a viscoelastic damper effect when receiving vibration due to an earthquake or the like, and the damping performance is effectively improved. Demonstrated. For this reason, the effect which attenuates a shake and suppresses a shake quickly, or makes a shake small is acquired.

[4]他の実施形態
上記鉄筋51は本発明の補強材の一例であってこれに限定されない。例えば同じ鉄筋であっても、図8(a)に示すように鉛直方向(上下方向に沿う)に延びる状態に柱鋼板11の主板部12の内面13に複数の鉄筋51を間隔をおいて固着する形態や、図8(b)に示すように水平方向および鉛直方向に延びる複数の鉄筋51を格子状に組んで固着する形態が挙げられる。
[4] Other Embodiments The reinforcing bar 51 is an example of a reinforcing material of the present invention, and is not limited thereto. For example, even with the same reinforcing bar, a plurality of reinforcing bars 51 are fixed to the inner surface 13 of the main plate portion 12 of the column steel plate 11 at intervals in a state extending in the vertical direction (along the vertical direction) as shown in FIG. And a form in which a plurality of reinforcing bars 51 extending in the horizontal direction and the vertical direction are assembled in a lattice shape and fixed as shown in FIG. 8B.

また、図9(a)に示すように、複数の短い棒状の鉄筋52を補強材とし、複数の鉄筋52を柱鋼板11の内面13に適宜間隔をあけて直角に立設した状態で固着したり、図9(b)に示すように、コ字状に折り曲げ加工した鋼板55を補強材とし、複数の鋼板55の一端面を柱鋼板11の主板部12の内面13に合わせて立てた状態で内面13に固着してもよい。上記鉄筋51や鋼板55は柱鋼板11の内面13からある程度突出しており、その突出長さは例えば各リブ8,9の幅程度の長さである。   Further, as shown in FIG. 9 (a), a plurality of short bar-shaped reinforcing bars 52 are used as reinforcing materials, and the plurality of reinforcing bars 52 are fixed to the inner surface 13 of the column steel plate 11 at right angles with appropriate intervals. 9B, the steel plate 55 bent into a U-shape is used as a reinforcing material, and one end surface of the plurality of steel plates 55 is set up in accordance with the inner surface 13 of the main plate portion 12 of the column steel plate 11. May be fixed to the inner surface 13. The rebar 51 and the steel plate 55 protrude from the inner surface 13 of the column steel plate 11 to some extent, and the protruding length is, for example, about the width of the ribs 8 and 9.

また、本発明の鋼板は柱の建造に限定されることなく、例えば柱と梁が交差する柱・梁接合部や床スラブ、壁等の躯体に適用することができる。   Moreover, the steel plate of the present invention is not limited to the construction of a pillar, and can be applied to a housing such as a pillar / beam joint where a pillar and a beam intersect, a floor slab, or a wall.

1…柱(躯体)
1A…柱型枠
8…縦リブ
9…横リブ
11…柱鋼板(コンクリート型枠用鋼板)
12…主板部
13…鋼板の内面
51…鉄筋(補強材)
52…鉄筋(補強材)
55…鋼板(補強材)
81,91…第1突出部
82,92…第2突出部
C…コンクリート
1 ... Pillar (frame)
DESCRIPTION OF SYMBOLS 1A ... Column formwork 8 ... Vertical rib 9 ... Horizontal rib 11 ... Column steel plate (steel plate for concrete formwork)
12 ... Main plate 13 ... Inner surface 51 of steel plate ... Reinforcement (reinforcing material)
52 ... Reinforcing bars (reinforcing materials)
55 ... Steel (reinforcing material)
81, 91 ... 1st protrusion part 82, 92 ... 2nd protrusion part C ... Concrete

Claims (5)

コンクリートによる躯体を建造または補強するにあたり、コンクリートの永久型枠として用いられる鋼板であって、コンクリートが接触する内面に、該内面から突出する補強材が設けられていることを特徴とするコンクリート型枠用鋼板。   A concrete formwork, which is a steel plate used as a permanent formwork for concrete in the construction or reinforcement of a concrete frame, wherein a reinforcing material protruding from the inner face is provided on the inner face where the concrete contacts. Steel plate. 前記補強材は鉄筋であって、複数の該鉄筋が前記内面に沿って水平方向および/または鉛直方向に延びる状態に前記鋼板に固着されていることを特徴とする請求項1に記載のコンクリート型枠用鋼板。   2. The concrete mold according to claim 1, wherein the reinforcing material is a reinforcing bar, and the plurality of reinforcing bars are fixed to the steel plate in a state of extending in a horizontal direction and / or a vertical direction along the inner surface. Steel plate for frames. 前記補強材は棒状あるいは板状であって、前記内面に立設される状態に該内面に固着されていることを特徴とする請求項1に記載のコンクリート型枠用鋼板。   The steel sheet for concrete formwork according to claim 1, wherein the reinforcing material is rod-shaped or plate-shaped, and is fixed to the inner surface so as to stand on the inner surface. コンクリートによる躯体を建造または補強するにあたり、複数を組み合わせることでコンクリートの永久型枠として用いられる鋼板であって、
主板部と、該主板部の端部に形成されたリブとを有し、
前記リブは、前記主板部から内側に突出する第1突出部と、該第1突出部からさらに内側に突出する第2突出部とを有することを特徴とするコンクリート型枠用鋼板。
A steel plate that is used as a permanent formwork for concrete by combining a plurality of them when building or reinforcing a concrete frame,
Having a main plate portion and a rib formed at an end of the main plate portion;
The steel plate for concrete formwork, wherein the rib has a first projecting portion projecting inward from the main plate portion and a second projecting portion projecting further inward from the first projecting portion.
前記第1突出部は前記主板部に対し略直角に屈曲して突出し、前記第2突出部は前記第1突出部に対し略直角に屈曲して突出していることを特徴とする請求項4に記載のコンクリート型枠用鋼板。   The said 1st protrusion part bends and protrudes in the substantially right angle with respect to the said main board part, The said 2nd protrusion part is bent and protruded in the substantially right angle with respect to the said 1st protrusion part, It is characterized by the above-mentioned. The steel sheet for concrete molds as described.
JP2014079062A 2014-04-08 2014-04-08 Steel plate for concrete mold Pending JP2015200097A (en)

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JPH0223608U (en) * 1988-08-03 1990-02-16
JPH02115437A (en) * 1988-10-25 1990-04-27 Kiyoshi Kaneda Form for constructing compound wall of steel plate and concrete
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JPS63233133A (en) * 1987-03-19 1988-09-28 鹿島建設株式会社 Steel plate/concrete panel structure
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