JP2012057338A - Concrete structure member using stainless steel reinforcing bars - Google Patents

Concrete structure member using stainless steel reinforcing bars Download PDF

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JP2012057338A
JP2012057338A JP2010200485A JP2010200485A JP2012057338A JP 2012057338 A JP2012057338 A JP 2012057338A JP 2010200485 A JP2010200485 A JP 2010200485A JP 2010200485 A JP2010200485 A JP 2010200485A JP 2012057338 A JP2012057338 A JP 2012057338A
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stainless steel
structural member
reinforcing bars
rebar
concrete
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Yoshio Shinoda
佳男 篠田
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NIPPON CONCRETE GIJUTSU KK
SHINWA CONCRETE KOGYO KK
TOEI CONCRETE Ltd
TOKYO CEMENT KOGYO KK
Yamau KK
Landes Co Ltd
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NIPPON CONCRETE GIJUTSU KK
SHINWA CONCRETE KOGYO KK
TOEI CONCRETE Ltd
TOKYO CEMENT KOGYO KK
Yamau KK
Landes Co Ltd
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Priority to JP2010200485A priority Critical patent/JP2012057338A/en
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Abstract

PROBLEM TO BE SOLVED: To provide a concrete structure member having an H-shaped, I-shaped, T-shaped or U-shaped cross sectional shape, which is easily manufactured, and for which the strength of the structure member can be improved while achieving weight reduction, the structure members can be easily joined together as well and the strength of a junction can be improved.SOLUTION: The concrete structure member using stainless steel reinforcing bars has an H-shaped, I-shaped, T-shaped or U-shaped cross sectional shape, axial reinforcement and tie hoops made of stainless steel reinforcing bars are arranged inside, and the axial reinforcement and the tie hoops made of ordinary reinforcing bars are arranged in a part where cover satisfying sufficient durability is secured.

Description

本発明は、基材にセメント系モルタルを使用し、ステンレス鉄筋、あるいはステンレス鉄筋と普通鉄筋を軸方向鉄筋、帯鉄筋に配筋したＨ型、Ｉ型、Ｔ型、Ｕ型のいずれかの断面形状を有するステンレス鉄筋使用コンクリート構造部材に関する。   The present invention uses a cement-based mortar as a base material, and has a stainless steel rebar, or a stainless steel rebar and a normal rebar arranged in an axial rebar or a belt rebar. The present invention relates to a concrete structural member using stainless steel reinforcing bars.

建築物や土木構造物の構造部材として用いるＩ型断面、Ｈ型断面、Ｔ型断面及びＵ型断面の構造部材は、曲げ耐力を低下させずに構造部材の重量を軽量化できるという利点を有している。Ｉ型断面、Ｈ型断面、Ｔ型断面及びＵ型断面の構造部材は鋼材では良く使用されている。普通コンクリート内に通常の補強鉄筋を配筋してＩ型断面、Ｈ型断面、Ｔ型断面及びＵ型断面の構造部材を形成することが考えられる。   Structural members with I-shaped, H-shaped, T-shaped and U-shaped cross-sections used as structural members for buildings and civil engineering structures have the advantage that the weight of the structural members can be reduced without reducing bending strength. is doing. Structural members having an I-shaped section, an H-shaped section, a T-shaped section, and a U-shaped section are often used in steel materials. It is conceivable to form a structural member having an I-shaped cross section, an H-shaped cross section, a T-shaped cross section, and a U-shaped cross section by arranging ordinary reinforcing steel bars in ordinary concrete.

また、特開２００２−２１０２３号公報には、繊維補強・超高強度コンクリートで形成されたＩ型断面の構造部材を橋脚の桁材として用いることが提案されている。また、特開２００５−２３６１３号公報には、普通コンクリートによって形成されたプレストレストコンクリート製のフランジ部と、繊維補強・超高強度コンクリートで形成されたウェブ部を一体に接合した断面Ｈ型の構造部材を形成することが提案されている。   Japanese Laid-Open Patent Publication No. 2002-21023 proposes using a structural member having an I-shaped cross section formed of fiber-reinforced / high-strength concrete as a bridge member. Japanese Patent Application Laid-Open No. 2005-23613 discloses an H-shaped structural member in which a flange portion made of prestressed concrete formed of ordinary concrete and a web portion formed of fiber-reinforced / high-strength concrete are integrally joined. Has been proposed to form.

特開２００２−２１０２３号公報Japanese Patent Laid-Open No. 2002-21023 特開２００５−２３６１３号公報JP 2005-23613 A

しかしながら、鋼材でＩ型断面、Ｈ型断面、Ｔ型断面及びＵ型断面の構造部材を形成する場合、防錆処理が必要になるという問題と、接合に溶接作業が必要になるという問題を有する。また、普通コンクリート内に補強鉄筋を配筋する補強方式は、塩化物イオン、二酸化炭素、水などの腐食因子の浸入により補強鉄筋が腐食することを防止するため、厳しい腐食性環境下では鉄筋かぶりが１００ｍｍ以上となることがある。かぶりコンクリートの厚みの大きさは部材重量の増大を招き、軽量化が要求されるＩ型断面、Ｈ型断面、Ｔ型断面及びＵ型断面の構造部材として弱点を有するものであった。   However, when forming a structural member having an I-shaped cross section, an H-shaped cross section, a T-shaped cross section, or a U-shaped cross section with a steel material, there is a problem that a rust prevention treatment is necessary and a problem that a welding operation is necessary for joining. . In addition, the reinforcement method in which reinforcing steel bars are placed in ordinary concrete prevents the reinforcing steel bars from corroding due to the intrusion of corrosion factors such as chloride ions, carbon dioxide, and water. May be 100 mm or more. The thickness of the cover concrete increases the weight of the member, and has a weak point as a structural member having an I-type cross section, an H-type cross section, a T-type cross section, and a U-type cross section, which is required to be reduced in weight.

また、特許文献１、２に開示されている繊維補強・超高強度コンクリート製のＩ型断面やＨ型断面の構造部材は、その製造方法が補強繊維を均等に分散するための混練工程、蒸気養生工程等の製造工程が複雑であるという問題と、Ｉ型断面やＨ型断面の構造部材を接合するため、構造部材内に連結緊張材を通すための緊張用シースを予め設置し、緊張材を挿入してジャッキで緊張材を緊張させて連結することが必要であり、接合のため多くの作業が必要になるという問題を有する。   Also, the fiber-reinforced / ultra-high-strength concrete structural members disclosed in Patent Documents 1 and 2 have a kneading step, steam for uniformly dispersing the reinforcing fibers by the manufacturing method thereof, steam In order to join the manufacturing process such as the curing process and the structural member having the I-shaped cross section and the H-shaped cross section, a tension sheath is installed in advance to pass the connecting tendon in the structural member. It is necessary to insert the screw and to connect the tension material with the jack, and there is a problem that a lot of work is required for joining.

本発明は、上記従来技術の課題を解決する、製造が容易であり、軽量化を実現しつつ構造部材の強度を向上させることが可能で、構造部材同士の接合も容易で、且つ、接合部の強度を向上させることが可能なＨ型、Ｉ型、Ｔ型及びＵ型のいずれかの断面形状を有するコンクリート構造部材を提供することを目的とする。   The present invention solves the above-described problems of the prior art, is easy to manufacture, can improve the strength of the structural member while realizing weight reduction, and can easily join the structural members to each other. It aims at providing the concrete structural member which has any cross-sectional shape of H type, I type, T type, and U type which can improve the intensity | strength of.

本発明のステンレス鉄筋使用コンクリート構造部材は、前記課題を解決するために、Ｈ型、Ｉ型、Ｔ型及びＵ型のいずれかの断面形状を有し、内部にステンレス鉄筋からなる軸方向鉄筋、帯鉄筋を配筋したことを特徴とする。   In order to solve the above-mentioned problem, the concrete structural member using stainless steel reinforcing bar of the present invention has any one of H-shaped, I-shaped, T-shaped, and U-shaped cross-sections, and an axial reinforcing steel bar made of stainless steel inside, It is characterized by the arrangement of band reinforcement.

また、本発明のステンレス鉄筋使用コンクリート構造部材は、構造部材内部の十分な耐久性を満足するかぶりが確保される部分に普通鉄筋からなる軸方向鉄筋、帯鉄筋を配筋したことを特徴とする。   Further, the concrete structural member using stainless steel reinforcing bars according to the present invention is characterized in that axial reinforcing bars made of ordinary reinforcing steel bars and strip reinforcing steel bars are arranged in a portion where a cover satisfying sufficient durability inside the structural members is secured. .

また、本発明のステンレス鉄筋使用コンクリート構造部材は、前記コンクリート構造部材の端部から軸方向鉄筋を露出させ、露出した前記軸方向鉄筋を隣接するコンクリート構造部材との重ね継手あるいは連結具により端部同士を連結する機械式継手とすることを特徴とする。機械式継手とは、例えば、露出した軸方向鉄筋を連結具であるスリーブ等で連結する連結方式である。また、隣接する前記コンクリート構造部材の端部から露出した前記軸方向鉄筋に直交する方向に、補強を目的としたステンレス鉄筋を配置することも可能である。   Further, the concrete structural member using stainless steel reinforcing bars of the present invention has an axial rebar exposed from an end of the concrete structural member, and the exposed axial rebar is connected to an adjacent concrete structural member by a lap joint or a connector. It is characterized by making it a mechanical coupling which connects mutually. The mechanical joint is, for example, a connection method in which exposed axial rebars are connected by a sleeve or the like that is a connection tool. It is also possible to arrange a stainless steel reinforcing bar for the purpose of reinforcement in a direction perpendicular to the axial reinforcing bar exposed from the end of the adjacent concrete structural member.

また、本発明のステンレス鉄筋使用コンクリート構造部材は、製造時、型枠内にステンレス鉄筋、あるいはステンレス鉄筋と普通鉄筋からなる軸方向鉄筋、帯鉄筋を配置し、前記型枠内に充填するセメント系部材に膨張材を混入し、前記軸方向鉄筋及び前記帯鉄筋を介してプレストレスト力を導入することを特徴とする。   Further, the concrete structural member using stainless steel reinforcing bars according to the present invention is a cement system in which stainless steel reinforcing bars or axial reinforcing bars made of stainless steel reinforcing bars and ordinary reinforcing steel bars are disposed in the mold during manufacture, and the mold is filled with the reinforcing bars. An expansion material is mixed in the member, and a prestressed force is introduced through the axial rebar and the band rebar.

Ｈ型、Ｉ型、Ｔ型及びＵ型のいずれかの断面形状を有し、内部にステンレス鉄筋からなる軸方向鉄筋、帯鉄筋を配筋したことにより、かぶりコンクリートの厚みを小さくでき、通常のセメント系部材を用いて薄肉軽量化され強度の大きいＨ型、Ｉ型、Ｔ型及びＵ型のいずれかの断面形状のコンクリート構造部材とすることが可能となる。また、通常のセメント系部材を用いて成形できるので、既存の製造設備で製造が可能であるため、新たな設備投資が不要であり、低コストで製造が可能となる。
構造部材内部の十分な耐久性を満足するかぶりが確保される部分に普通鉄筋からなる軸方向鉄筋、帯鉄筋を配筋することで、かぶりコンクリートの厚みを小さくできるという作用を維持しつつ、高価なステンレス鉄筋の使用量を抑制し製造コストを低減することが可能となる。
また、コンクリート構造部材の端部から軸方向鉄筋を露出させ、前記露出した軸方向鉄筋を隣接するコンクリート構造部材との重ね継手とすることで、隣接する部材同士を構造的に一体化することが可能となる。また、コンクリート構造部材の端部に連結具であるスリーブ等を配置し露出した軸方向鉄筋同士を連結することで機械式継手として容易に接合することが可能となる。
製造時、型枠内にステンレス鉄筋からなる軸方向鉄筋、帯鉄筋を配置し、前記型枠内に充填するセメント系部材に膨張材を混入し、前記軸方向鉄筋及び前記帯鉄筋を介してプレストレスト力を導入することにより、コンクリート構造部材をより薄肉軽量化することが可能となる。 It has a cross-sectional shape of any one of H type, I type, T type and U type, and by arranging axial rebars and strip rebars made of stainless steel bars inside, it is possible to reduce the thickness of the cover concrete, It is possible to obtain a concrete structural member having a cross-sectional shape of any of H-type, I-type, T-type, and U-type that is thin and lightweight and has high strength using a cement-based member. Moreover, since it can shape | mold using a normal cement-type member, since it can manufacture with the existing manufacturing equipment, a new capital investment is unnecessary and it can manufacture at low cost.
It is expensive while maintaining the effect that the thickness of the cover concrete can be reduced by arranging axial rebars and strip rebars made of ordinary rebar in the part where the cover that satisfies the sufficient durability inside the structural member is secured It is possible to reduce the manufacturing cost by suppressing the amount of stainless steel rebar used.
Further, by exposing the axial rebar from the end portion of the concrete structural member and using the exposed axial rebar as a lap joint with the adjacent concrete structural member, the adjacent members can be structurally integrated. It becomes possible. Moreover, it becomes possible to join easily as a mechanical joint by arrange | positioning the sleeve etc. which are a coupling tool in the edge part of a concrete structure member, and connecting the exposed axial direction reinforcing bars.
At the time of manufacturing, axial rebars and band rebars made of stainless steel rebar are placed in the mold, and an expansion material is mixed into the cement-based member filling the mold, and prestressed via the axial rebar and the band rebar By introducing the force, the concrete structural member can be made thinner and lighter.

本発明のＨ型のステンレス鉄筋使用コンクリート構造部材を示す図である。It is a figure which shows the H-shaped stainless steel rebar use concrete structural member of this invention. 本発明のＴ型のステンレス鉄筋使用コンクリート構造部材を示す図である。It is a figure which shows the T type | mold stainless steel rebar use concrete structural member of this invention. 本発明のＵ型のステンレス鉄筋使用コンクリート構造部材を示す図である。It is a figure which shows the U-shaped stainless steel rebar use concrete structure member of this invention. （ａ）（ｂ）（ｃ）（ｄ）本発明のステンレス鉄筋使用コンクリート構造部材の接合の工程を示す図である。(A) (b) (c) (d) It is a figure which shows the process of the joining of the concrete structure member using stainless steel rebar of this invention. （ａ）（ｂ）（ｃ）（ｄ）本発明のステンレス鉄筋使用コンクリート構造部材のスリーブ（機械式継手）を用いた接合の工程を示す図である。(A) (b) (c) (d) It is a figure which shows the process of the joining using the sleeve (mechanical coupling) of the concrete structural member using stainless steel reinforcement of this invention. 本発明のステンレス鉄筋使用コンクリート構造部材を直交する方向に接合する状態を示す図である。It is a figure which shows the state which joins the stainless steel reinforcement use concrete structure member of this invention in the direction orthogonally crossed.

本発明の実施の形態を図により説明する。図１は、本発明のステンレス鉄筋使用コンクリート構造部材の一実施形態の断面図である。   Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of an embodiment of a concrete structural member using stainless steel rebar of the present invention.

Ｈ又はＩ型断面の構造部材は、一般的に鋼材で形成され、建築物の柱、梁、また橋梁の桁等として用いられる。Ｈ又はＩ型断面の構造部材を通常のコンクリートで形成する場合、部材表面からの塩化物イオン、二酸化炭素、水などの腐食因子の浸入による鉄筋の腐食を防止するために、かぶりコンクリートの厚みを大きくしなければならず、そのため、構造部材の重量が大きくなり、軽量化が要求される建築物、土木構造物の構造部材として弱点を有するものであった。   A structural member having an H or I-shaped cross section is generally formed of a steel material, and is used as a pillar, beam, bridge girder, or the like of a building. When forming a structural member of H or I type cross section with ordinary concrete, the thickness of the cover concrete should be reduced in order to prevent corrosion of the reinforcing bars due to the intrusion of corrosion factors such as chloride ions, carbon dioxide and water from the surface of the member. Therefore, the weight of the structural member is increased, and the structural member of a building or civil engineering structure that is required to be reduced in weight has a weak point.

図１に示されるステンレス鉄筋使用コンクリート構造部材１は、従来のコンクリート構造部材の持つ課題を解決したＨ又はＩ型断面の構造部材で、曲げ耐力を低下させずに構造部材の重量を軽量化できるという利点を有している。Ｈ又はＩ型断面のステンレス鉄筋使用コンクリート構造部材１は、上フランジ２と下フランジ３がウェブ４で連結され、断面Ｈ又はＩ字の形状をしている。   A concrete structural member 1 using stainless steel rebar shown in FIG. 1 is a structural member having an H or I-shaped cross section that solves the problems of conventional concrete structural members, and can reduce the weight of the structural members without reducing bending strength. Has the advantage. The concrete structural member 1 using a stainless steel reinforcing bar having an H or I type cross section has an upper flange 2 and a lower flange 3 connected by a web 4 and has a cross section H or I shape.

Ｈ又はＩ型断面のステンレス鉄筋使用コンクリート構造部材１の上フランジ２と下フランジ３がウェブ４の内部にステンレス鉄筋からなる軸方向鉄筋５と帯鉄筋６が配筋される。必要に応じて中間帯鉄筋７を配筋しても良い。上フランジ２と下フランジ３とをウェブ４を介して強固に連結するために、上フランジ２と下フランジ３の間を連結するステンレス鉄筋からなる連結帯鉄筋８を配筋する。コンクリート構造部材内で普通鉄筋で十分な耐久性を満足するかぶりが確保される部分には、図１に示されるように、普通鉄筋を軸方向鉄筋１６として使用することが可能である。ステンレス鉄筋は普通鉄筋に比較して高価であるため、普通鉄筋を併用することで、かぶりコンクリートの厚みを小さくできるという作用を維持しつつ、ステンレス鉄筋の使用量を抑制し製造コストを低減することが可能となる。   The upper flange 2 and the lower flange 3 of the concrete structural member 1 using stainless steel reinforcing bars having an H or I-shaped cross section are arranged in the web 4 with axial reinforcing bars 5 and band reinforcing bars 6 made of stainless steel reinforcing bars. You may arrange the intermediate strip reinforcing bar 7 as needed. In order to firmly connect the upper flange 2 and the lower flange 3 via the web 4, a connecting band reinforcing bar 8 made of a stainless steel rebar connecting the upper flange 2 and the lower flange 3 is arranged. As shown in FIG. 1, a normal reinforcing bar can be used as an axial reinforcing bar 16 in a portion where a cover satisfying sufficient durability with a normal reinforcing bar is secured in the concrete structural member. Since stainless steel rebar is expensive compared to ordinary rebar, the amount of stainless steel rebar used can be reduced and manufacturing costs can be reduced while maintaining the effect of reducing the thickness of the cover concrete by using ordinary rebar together. Is possible.

構造部材の内部の補強鉄筋を耐腐食性のステンレス鉄筋とすることで、構造部材の強度を維持してかぶりコンクリートの厚みを小さくすることができ、Ｈ又はＩ型断面の構造部材の薄肉化、軽量化が実現できる。ステンレス鉄筋をＪＩＳ 鉄筋コンクリート用ステンレス異形棒鋼 ＪＩＳ Ｇ４３２２とすることでコンクリートとの付着性能が向上する。   By using a corrosion-resistant stainless steel reinforcing bar inside the structural member, the thickness of the cover concrete can be reduced while maintaining the strength of the structural member. Weight reduction can be realized. Adhesion performance with concrete is improved by using JIS G4322 as the stainless steel bar for reinforced concrete.

Ｈ又はＩ型断面のステンレス鉄筋使用コンクリート構造部材１の製造時、型枠内に充填する材料として、セメント系部材に膨張材を加えて成形することにより、型枠内部に配置されたステンレス鉄筋、あるいはステンレス鉄筋と普通鉄筋からなる軸方向鉄筋５、１６及び帯鉄筋６を介して成形されるコンクリート構造部材にプレストレスト力を導入することが可能となり、Ｈ又はＩ型断面のステンレス鉄筋使用コンクリート構造部材１の薄肉軽量化を一層促進することが可能となる。   When manufacturing a concrete structural member 1 using a stainless steel reinforcing bar having an H or I-shaped cross section, as a material to be filled in the mold, by adding an expansion material to a cement-based member and molding the stainless steel reinforcing bar disposed inside the mold, Alternatively, it becomes possible to introduce a prestressed force into a concrete structural member formed through the axial rebars 5 and 16 and the belt rebar 6 made of stainless steel bars and ordinary reinforcing bars, and use H or I type cross section stainless steel reinforcing concrete structural members. It becomes possible to further promote the reduction in thickness and weight of 1.

図２に示されるステンレス鉄筋使用コンクリート構造部材１は、Ｔ型断面の構造部材で、曲げ耐力を低下させずに構造部材を薄肉軽量化できるという利点を有している。Ｔ型断面のステンレス鉄筋使用コンクリート構造部材１は、フランジ９とウェブ１０とがＴ形に連結された形状をしている。   The concrete structural member 1 using stainless steel reinforcing bars shown in FIG. 2 is a structural member having a T-shaped cross section, and has an advantage that the structural member can be reduced in thickness and weight without reducing bending strength. The concrete structural member 1 using a stainless steel reinforcing bar having a T-shaped cross section has a shape in which a flange 9 and a web 10 are connected in a T shape.

Ｔ型断面のステンレス鉄筋使用コンクリート構造部材１のフランジ９とウェブ１０の内部にステンレス鉄筋からなる軸方向鉄筋５と帯鉄筋６が配筋される。必要に応じて中間帯鉄筋７を配筋しても良い。フランジ９とウェブ１０を強固に連結するために、フランジ９とウェブ１０の間を連結するステンレス鉄筋からなる連結帯鉄筋８を配筋する。構造部材内部で十分な耐久性を満足するかぶりが確保される部分では、普通鉄筋を軸方向鉄筋１６として併用して使用することが可能となる。ステンレス鉄筋は普通鉄筋に比較して高価であるため、普通鉄筋を併用することで、かぶりコンクリートの厚みを小さくできるという作用を維持しつつ、ステンレス鉄筋の使用を抑制し製造コストを低減することが可能となる。   Inside the flange 9 and the web 10 of the concrete structural member 1 using a stainless steel reinforcing bar having a T-shaped section, an axial reinforcing bar 5 and a belt reinforcing bar 6 made of stainless steel reinforcing bars are arranged. You may arrange the intermediate strip reinforcing bar 7 as needed. In order to firmly connect the flange 9 and the web 10, a connecting band reinforcing bar 8 made of a stainless steel rebar connecting the flange 9 and the web 10 is arranged. It is possible to use a normal reinforcing bar in combination as the axial reinforcing bar 16 in a portion where a cover satisfying sufficient durability is secured inside the structural member. Stainless steel rebar is expensive compared to ordinary rebar, so using normal rebar together can reduce the manufacturing cost by suppressing the use of stainless steel while maintaining the effect of reducing the thickness of the cover concrete. It becomes possible.

構造部材の内部の補強鉄筋を耐腐食性のステンレス鉄筋とすることで、構造部材の強度を維持してかぶりコンクリートの厚みを小さくすることができ、Ｔ型断面の構造部材の薄肉化、軽量化が実現できる。ステンレス鉄筋をＪＩＳ 鉄筋コンクリート用ステンレス異形棒鋼 ＪＩＳ Ｇ４３２２とすることでコンクリートとの付着性能が向上する。コンクリート構造部材にプレストレスト力を導入する構成は、上記Ｈ又はＩ型断面のステンレス鉄筋使用コンクリート構造部材１と同様であるので説明を省略する。   By using a corrosion-resistant stainless steel reinforcing bar inside the structural member, the strength of the structural member can be maintained and the thickness of the cover concrete can be reduced, and the structural member with a T-shaped cross section can be made thinner and lighter. Can be realized. Adhesion performance with concrete is improved by using JIS G4322 as the stainless steel bar for reinforced concrete. The configuration for introducing the prestressing force to the concrete structural member is the same as that of the above-described H or I-shaped stainless steel reinforced concrete structural member 1, and the description thereof will be omitted.

図３に示されるステンレス鉄筋使用コンクリート構造部材１は、Ｕ型断面の構造部材で、曲げ耐力を低下させずに構造部材を薄肉軽量化できるという利点を有している。Ｕ型断面のステンレス鉄筋補強コンクリート部材１は、ウェブ１１の両端にフランジ１２が連結され断面Ｕ字形の形状をしている。   3 is a structural member having a U-shaped cross section, and has an advantage that the structural member can be thinned and lightened without lowering the bending strength. The U-shaped cross section of the stainless steel reinforced concrete member 1 has a U-shaped cross section in which a flange 12 is connected to both ends of a web 11.

Ｕ型断面のステンレス鉄筋使用コンクリート構造部材１のウェブ１１とフランジ１２の内部にステンレス鉄筋からなる軸方向鉄筋５と帯鉄筋６が配筋される。必要に応じて中間帯鉄筋７を配筋しても良い。ウェブ１１とフランジ１２を強固に連結するために、フランジ１２とウェブ１１の間を連結するステンレス鉄筋からなる連結帯鉄筋８を配筋する。構造部材内部で十分な耐久性を満足するかぶりが確保される部分では、普通鉄筋を軸方向鉄筋１６として併用して使用することが可能となる。ステンレス鉄筋は普通鉄筋に比較して高価であるため、普通鉄筋を併用することで、かぶりコンクリートの厚みを小さくできるという作用を維持しつつ、ステンレス鉄筋の使用量を抑制し製造コストを低減することが可能となる。   Inside the web 11 and the flange 12 of the U-shaped cross section of the stainless steel reinforcing-concrete concrete structural member 1, the axial rebar 5 and the strip rebar 6 made of stainless steel rebar are laid. You may arrange the intermediate strip reinforcing bar 7 as needed. In order to firmly connect the web 11 and the flange 12, a connecting band reinforcing bar 8 made of a stainless steel rebar connecting the flange 12 and the web 11 is arranged. It is possible to use a normal reinforcing bar in combination as the axial reinforcing bar 16 in a portion where a cover satisfying sufficient durability is secured inside the structural member. Since stainless steel rebar is expensive compared to ordinary rebar, the amount of stainless steel rebar used can be reduced and manufacturing costs can be reduced while maintaining the effect of reducing the thickness of the cover concrete by using ordinary rebar together. Is possible.

構造部材の内部の補強鉄筋を耐腐食性の高いステンレス鉄筋とすることで、構造部材の強度を維持してかぶりコンクリートの厚みを小さくすることができ、Ｕ型断面の構造部材の薄肉化、軽量化が実現できる。ステンレス鉄筋をＪＩＳ 鉄筋コンクリート用ステンレス異形棒鋼 ＪＩＳ Ｇ４３２２とすることでコンクリートとの付着性能が向上する。コンクリート構造部材にプレストレスト力を導入する構成は、上記Ｈ又はＩ型断面のステンレス鉄筋使用コンクリート構造部材１と同様であるので説明を省略する。 By using high- corrosion-resistant stainless steel reinforcing bars inside the structural members, the strength of the structural members can be maintained and the thickness of the cover concrete can be reduced. Can be realized. Adhesion performance with concrete is improved by using JIS G4322 as the stainless steel bar for reinforced concrete. The configuration for introducing the prestressing force to the concrete structural member is the same as that of the above-described H or I-shaped stainless steel reinforced concrete structural member 1, and the description thereof will be omitted.

図４（ａ）（ｂ）（ｃ）（ｄ）は、本発明のステンレス補強コンクリート構造部材１を直列に接合する場合の一実施形態を示す。   4 (a), (b), (c), and (d) show an embodiment in which the stainless steel reinforced concrete structural members 1 of the present invention are joined in series.

図４（ａ）に示されるように、隣接するステンレス鉄筋補強コンクリート部材１Ａ、１Ｂの端部から軸方向鉄筋５ａ，５ｂを所定長さ露出させる。図４（ｂ）に示される工程では、隣接するステンレス鉄筋補強コンクリート部材１Ａ、１Ｂを接合位置に位置させる。隣接するステンレス鉄筋補強コンクリート部材１Ａ、１Ｂの端部から露出した軸方向鉄筋５ａと５ｂが重ね継手となる。図４（ｃ）に示される工程では、重ね継手を構成する露出した軸方向鉄筋５ａ、５ｂと直交する方向のステンレス鉄筋からなる補強鉄筋１３を配筋する。図４（ｄ）に示す工程では、接合部に型枠を設置し、セメント系部材からなる固化剤を充填して固化させ、接合部コンクリート１４が形成される。   As shown in FIG. 4A, the axial rebars 5a and 5b are exposed for a predetermined length from the end portions of the adjacent stainless steel reinforcing steel reinforcing concrete members 1A and 1B. In the step shown in FIG. 4B, the adjacent stainless steel reinforcing steel reinforcing concrete members 1A and 1B are positioned at the joining position. The axial rebars 5a and 5b exposed from the ends of the adjacent stainless steel reinforcing steel reinforcing concrete members 1A and 1B are lap joints. In the step shown in FIG. 4C, reinforcing reinforcing bars 13 made of stainless steel reinforcing bars in a direction orthogonal to the exposed axial reinforcing bars 5a and 5b constituting the lap joint are arranged. In the step shown in FIG. 4 (d), a formwork is installed at the joint, and a solidifying agent made of a cement-based member is filled and solidified to form the joint concrete 14.

図５（ａ）（ｂ）（ｃ）（ｄ）は、本発明のステンレス補強コンクリート構造部材１を直列に接合する場合の他の実施形態を示す。   FIGS. 5A, 5B, 5C, and 5D show another embodiment in which the stainless steel reinforced concrete structural member 1 of the present invention is joined in series.

図５（ａ）に示されるように、隣接するステンレス鉄筋補強コンクリート部材１Ａ、１Ｂの端部から軸方向鉄筋５ａ、５ｂを所定長さが露出させる。図５（ｂ）に示される工程では、隣接するステンレス鉄筋補強コンクリート部材１Ａ、１Ｂを接合位置に位置させる。隣接するステンレス鉄筋補強コンクリート部材１Ａ、１Ｂの端部から露出した軸方向鉄筋５ａと５ｂ同士をスリーブ等の連結具１５で連結して機械式継手とする。機械式継手としては、スリーブ等の連結具１５のほかに、例えば、露出した軸方向鉄筋５ａと５ｂ同士を番線等で連結しても良い。図５（ｃ）に示される工程では、連結部材１５で連結された露出した軸方向鉄筋５ａ、５ｂと直交する方向のステンレス鉄筋からなる補強鉄筋１３を配筋する。図５（ｄ）に示す工程では、接合部に型枠を設置し、セメント系部材からなる固化剤を充填して固化させ、接合部コンクリート１４が形成される。露出した軸方向鉄筋５ａ、５ｂを重ね継ぎ手、あるいは連結具１５で連結して機械式継手とすることで、隣接する部材同士を構造的に一体化することが可能となり、コンクリート構造部材の端部に連結部であるスリーブ等を配置し露出した軸方向鉄筋同士を連結することで機械式継手として容易に接合することが可能となる。   As shown in FIG. 5A, a predetermined length of the axial rebars 5a and 5b is exposed from the ends of the adjacent stainless steel reinforcing steel reinforcing concrete members 1A and 1B. In the step shown in FIG. 5 (b), the adjacent stainless steel reinforcing steel reinforcing concrete members 1A and 1B are positioned at the joining position. The axial rebars 5a and 5b exposed from the ends of the adjacent stainless steel reinforcement reinforced concrete members 1A and 1B are connected by a connector 15 such as a sleeve to form a mechanical joint. As the mechanical joint, in addition to the coupling tool 15 such as a sleeve, for example, the exposed axial rebars 5a and 5b may be coupled by a wire or the like. In the step shown in FIG. 5C, reinforcing reinforcing bars 13 made of stainless steel reinforcing bars in a direction orthogonal to the exposed axial reinforcing bars 5a and 5b connected by the connecting member 15 are arranged. In the step shown in FIG. 5 (d), a formwork is installed at the joint, and a solidifying agent made of a cement-based member is filled and solidified, whereby the joint concrete 14 is formed. Adjacent members can be structurally integrated by connecting the exposed axial rebars 5a and 5b with a lap joint or a connector 15 to form a mechanical joint. It is possible to easily join as a mechanical joint by disposing a sleeve or the like as a connecting portion and connecting the exposed axial rebars to each other.

図６は、ステンレス補強コンクリート構造部材１を直交する方向に接合する場合の実施形態を示す。   FIG. 6 shows an embodiment in which the stainless steel reinforced concrete structural member 1 is joined in a direction orthogonal to each other.

隣接するステンレス鉄筋補強コンクリート部材１Ａ、１Ｂを直交する位置に配置する。隣接するステンレス鉄筋補強コンクリート部材１Ａ、１Ｂの端部から軸方向鉄筋５ａ、５ｂを所定長さが露出させる。直交する位置に配置されたステンレス鉄筋補強コンクリート部材１Ａ、１Ｂの端部から露出した軸方向鉄筋５ａ、５ｂが接合部で交差して配置される。この状態で型枠を設置し、セメント系部材からなる固化剤を充填して固化させ、接合部コンクリートを形成する。隣接するステンレス鉄筋補強コンクリート部材１Ａ、１Ｂを直交して接合するケースにおいては、露出した軸方向鉄筋５ａ、５ｂが接合部で交差して配置されることで、その接合部の強度を増加することが可能となる。   Adjacent stainless steel reinforced concrete members 1A and 1B are arranged at orthogonal positions. A predetermined length of the axial rebars 5a and 5b is exposed from the ends of the adjacent stainless steel reinforcing steel reinforcing concrete members 1A and 1B. The axial rebars 5a and 5b exposed from the end portions of the stainless steel reinforcing bar reinforced concrete members 1A and 1B arranged at orthogonal positions are arranged so as to intersect each other at the joint. In this state, a formwork is installed, and a solidifying agent made of a cement-based member is filled and solidified to form joint concrete. In the case where the adjacent stainless steel reinforcement reinforced concrete members 1A and 1B are joined at right angles, the exposed axial rebars 5a and 5b are arranged so as to intersect each other at the joint, thereby increasing the strength of the joint. Is possible.

以上のように、本発明のステンレス鉄筋使用コンクリート構造部材１は、かぶりコンクリートの厚みを小さくでき、通常のセメント系部材を用いて薄肉軽量化され強度の大きいＨ型、Ｉ型、Ｔ型及びＵ型のいずれかの断面形状のコンクリート構造部材とすることが可能となる。   As described above, the concrete structural member 1 using stainless steel rebar according to the present invention can reduce the thickness of the cover concrete, and is thin, light weight and high in strength by using a normal cement-based member. It becomes possible to make a concrete structural member having any cross-sectional shape of the mold.

１：ステンレス鉄筋使用コンクリート構造部材、２：上フランジ、３：下フランジ、４：ウェブ、５：軸方向鉄筋、６：帯鉄筋、７：中間帯鉄筋、８：連結帯鉄筋、９：フランジ、１０：ウェブ、 １１：ウェブ、１２：フランジ、１３：補強鉄筋 、１４：接合部コンクリート、１５：連結具、１６：普通鉄筋   1: concrete structural member using stainless steel rebar, 2: upper flange, 3: lower flange, 4: web, 5: axial rebar, 6: rebar, 7: intermediate rebar, 8: connecting rebar, 9: flange 10: Web, 11: Web, 12: Flange, 13: Reinforcing bar, 14: Concrete joint, 15: Connecting tool, 16: Normal reinforcing bar

Claims (4)

Ｈ型、Ｉ型、Ｔ型及びＵ型のいずれかの断面形状を有し、
内部にステンレス鉄筋からなる軸方向鉄筋、帯鉄筋を配筋したことを特徴とするステンレス鉄筋使用コンクリート構造部材。 It has a cross-sectional shape of any of H type, I type, T type and U type,
A concrete structural member using stainless steel rebar, characterized by the arrangement of axial rebar made of stainless steel rebar and band rebar inside. 構造部材内部の十分な耐久性を満足するかぶりが確保される部分に普通鉄筋からなる軸方向鉄筋、帯鉄筋を配筋したことを特徴とする請求項１に記載のステンレス鉄筋使用コンクリート構造部材。   2. The concrete structural member using stainless steel reinforcing bars according to claim 1, wherein axial reinforcing bars and band reinforcing bars made of ordinary reinforcing bars are arranged in a portion where a cover satisfying sufficient durability inside the structural member is secured. 前記コンクリート構造部材の端部から軸方向鉄筋を露出させ、露出した軸方向鉄筋を隣接するコンクリート構造部材との重ね継手あるいは連結具により端部同士を連結する機械式継手とすることを特徴とする請求項１または２に記載のステンレス鉄筋使用コンクリート構造部材。   An axial rebar is exposed from an end of the concrete structural member, and the exposed axial rebar is a mechanical joint that connects ends by a lap joint or a connecting tool with an adjacent concrete structural member. A concrete structural member using stainless steel reinforcing bars according to claim 1 or 2. 製造時、型枠内にステンレス鉄筋、あるいはステンレス鉄筋と普通鉄筋からなる軸方向鉄筋、帯鉄筋を配筋し、前記型枠内に充填するセメント系部材に膨張材を混入し、前記軸方向鉄筋及び前記帯鉄筋を介してプレストレスト力を導入することを特徴とする請求項１ないし３のいずれか1項に記載のステンレス鉄筋使用コンクリート構造部材。   At the time of manufacture, stainless steel reinforcing bars, or axial reinforcing bars made of stainless steel and ordinary reinforcing steel bars or strip reinforcing bars are placed in the mold, and an expansion material is mixed into the cement-based member filling the mold, and the axial reinforcing bars The prestressed force is introduced through the band reinforcing bar and the concrete structural member using the stainless steel reinforcing bar according to any one of claims 1 to 3.
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