JP3129636B2 - Adhesive reinforcement structure for reinforced concrete members - Google Patents
Adhesive reinforcement structure for reinforced concrete membersInfo
- Publication number
- JP3129636B2 JP3129636B2 JP07183083A JP18308395A JP3129636B2 JP 3129636 B2 JP3129636 B2 JP 3129636B2 JP 07183083 A JP07183083 A JP 07183083A JP 18308395 A JP18308395 A JP 18308395A JP 3129636 B2 JP3129636 B2 JP 3129636B2
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing
- steel plate
- concrete
- stiffener
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000011150 reinforced concrete Substances 0.000 title claims description 20
- 230000002787 reinforcement Effects 0.000 title claims description 16
- 230000001070 adhesive effect Effects 0.000 title description 13
- 239000000853 adhesive Substances 0.000 title description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 58
- 239000010959 steel Substances 0.000 claims description 58
- 239000004567 concrete Substances 0.000 claims description 33
- 230000003014 reinforcing effect Effects 0.000 claims description 33
- 239000003351 stiffener Substances 0.000 claims description 29
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 26
- 230000002093 peripheral effect Effects 0.000 claims description 21
- 238000005452 bending Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 6
- 230000000452 restraining effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
- Foundations (AREA)
- Rod-Shaped Construction Members (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】本願発明は、鋼板で被覆した
鉄筋コンクリート部材の鉄筋付着力補強構造に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure for reinforcing a reinforcing member of a reinforced concrete member covered with a steel plate.
【０００２】[0002]
【発明が解決しようとする課題】出願人等は、先に特願
平６−１６６６７８号において、主として中高層線路上
空利用建築物を対象とした力学性能に優れた鉄骨柱と杭
の接合部を提供することを目的として、鉄骨柱の下部を
杭頭部の鉄筋コンクリート内に埋め込んでなる鉄骨柱と
杭の接合部において、杭の外周全面または外周の一部を
外周補強鋼板で被覆し、鉄骨柱と外周補強鋼板間をスチ
フナー材でつないだ構造を提案している。SUMMARY OF THE INVENTION The applicant has previously disclosed in Japanese Patent Application No. Hei 6-166678 a joint between a steel column and a pile excellent in mechanical performance mainly for a building to be used above middle and high-rise railway lines. At the joint between the steel column and the pile, in which the lower part of the steel column is embedded in the reinforced concrete at the head of the pile, for the purpose of covering the entire outer periphery of the pile or a part of the outer periphery with the outer peripheral reinforcing steel plate, We have proposed a structure in which the outer peripheral reinforcing steel plates are connected with a stiffener.
【０００３】その場合、外周補強鋼板により杭のコンク
リートを外側から拘束するとともに、鉄骨柱から複合杭
に伝達する曲げモーメントの一部を負担し、さらにパン
チングシヤー等が問題となるはしあき距離が短い部分に
ついて、鉄骨柱と外周補強鋼板間をスチフナー材でつな
ぐことで破壊耐力を増大させている。In such a case, the concrete of the pile is constrained from the outside by the outer peripheral reinforcing steel plate, a part of the bending moment transmitted from the steel column to the composite pile is borne, and the clearance distance at which punching shear or the like becomes a problem is reduced. For the short part, the fracture strength is increased by connecting the steel column and the outer peripheral reinforcing steel plate with a stiffener material.
【０００４】しかし、その場合もコンクリート部分の主
筋の付着割裂破壊（主筋に対しコンクリートが剥離す
る）によって接合部が破壊する傾向があり、これに対し
外周を被覆する鋼板はその面外方向の曲げ剛性で抵抗す
るが、鋼板の幅厚比Ｂ／ｔ（図４参照）が大きい場合、
低荷重域で主筋のコンクリート付着割裂破壊が生じる。[0004] However, in this case as well, there is a tendency for the joint to break due to bond splitting failure of the main reinforcement of the concrete portion (concrete peeling from the main reinforcement), whereas the steel sheet covering the outer periphery is bent in the out-of-plane direction. Although it resists with rigidity, when the width-to-thickness ratio B / t (see FIG. 4) of the steel sheet is large,
Adhesive splitting failure of main reinforcement occurs in low load range.
【０００５】したがって、接合部の保有耐力設計を達成
するためには付着割裂強度を増加させる必要がある。Therefore, it is necessary to increase the bond splitting strength in order to achieve the design of the holding strength of the joint.
【０００６】また、例えば、森下他；「鋼管で被覆補強
されたコンクリートと異形鉄筋の間の付着性状」、コン
クリート工学年次論文報告集９−２、１９８７年（以
下、文献１という）には、鉄筋コンクリート短柱を鋼管
で被覆補強した場合の鋼管補強短柱の復元力特性につい
て、コンクリートと異形鉄筋との付着性状が検討されて
おり、そこにはコンクリート断面外周を角形鋼管で被覆
補強した鉄筋付着試験から、角形鋼管で被覆補強してい
ない（すなわち鉄筋コンクリート断面のみの）場合に比
べ、鉄筋の付着割裂傷強度が高くなることが報告されて
いる。For example, see Morishita et al., "Adhesion between Concrete Reinforced with Steel Pipe and Reinforced Steel", Annual Report of Concrete Engineering, 9-2, 1987 (hereinafter referred to as Reference 1). As for the restoring force characteristics of steel pipe reinforced short columns when steel reinforced concrete short columns are covered and reinforced with steel pipes, the adhesive properties between concrete and deformed reinforcing steel have been studied. From the adhesion test, it is reported that the bond splitting strength of the reinforcing bar is higher than that in the case where the covering is not reinforced with the square steel pipe (that is, only the reinforced concrete section is used).
【０００７】鉄筋コンクリート断面部分については、材
軸方向の主筋と主筋の周りを取り巻くせん断補強筋とし
ての帯筋を配筋するのが普通であるが、外周を鋼板で補
強し、せん断補強を省略した鉄筋コンクリート部材は、
上述のように鋼板の幅厚比Ｂ／ｔが大きい場合、主筋の
コンクリート付着割裂破壊が生じやすい。[0007] In the section of reinforced concrete, it is common to arrange a main reinforcing bar in the direction of the material axis and a band reinforcing bar surrounding the main reinforcing bar, but the outer periphery is reinforced with a steel plate and the shear reinforcing is omitted. Reinforced concrete members
When the width-to-thickness ratio B / t of the steel sheet is large as described above, the concrete bond of the main bar is easily split and fractured.
【０００８】本願発明は、上述のような背景のもとに、
鋼板で被覆した鉄筋コンクリート部材について、鉄筋の
付着割裂強度を増すことで、部材全体としての耐力の向
上を図ったものである。The present invention is based on the above background,
With respect to a reinforced concrete member coated with a steel plate, the strength of the entire reinforcing member is improved by increasing the bond splitting strength of the reinforcing bar.
【０００９】[0009]
【課題を解決するための手段】本願発明の鉄筋コンクリ
ート部材の鉄筋付着力補強構造は、長手方向に延びる複
数本の主筋を配筋した鉄筋コンクリート部材の外周の全
面または一部を外周補強鋼板で被覆し、前記外周補強鋼
板の相対する面の鋼板間をコンクリート断面内に配した
前記鋼板の曲げ剛性を高めるためのスチフナーで連結す
ることにより、外周補強鋼板による内側のコンクリート
の拘束効果を高め、かつ長手方向の少なくとも前記スチ
フナーを設けた区間については帯筋を設けることなく、
前記主筋とコンクリート間の付着割裂破壊を抑制するよ
う構成したことを特徴とするものである。According to the present invention, there is provided a reinforcement reinforcing structure for a reinforced concrete member of the present invention, in which a whole or a part of the outer periphery of a reinforced concrete member provided with a plurality of main reinforcements extending in a longitudinal direction is covered with an outer peripheral reinforcing steel plate. By connecting the steel plates on the opposite surfaces of the outer peripheral reinforcing steel plate with a stiffener for increasing the bending rigidity of the steel plate arranged in the concrete cross section, the effect of restraining the inner concrete by the outer peripheral reinforcing steel plate is enhanced, and Direction at least the stee
For the section where the funer is provided, without providing a stirrup,
The present invention is characterized in that it is configured to suppress the bond splitting failure between the main reinforcement and the concrete.
【００１０】主な用途としては、前述した特願平６−１
６６６７８号の場合と同様の既存の鉄道線路敷の上空に
跨る中高層線路上空利用建築物、河川、道路の上空に跨
る建築物における鉄骨柱と鋼板で被覆補強した鉄筋コン
クリート杭の接合部があるが、これらに限定されず、広
く土木、建築構造物における鋼板被覆鉄筋コンクリート
部材に適用可能である。The main use is as described in the above-mentioned Japanese Patent Application No. Hei.
There is a joint between a steel column and a steel reinforced concrete pile covered and reinforced with a steel plate in a building that spans the middle and high-rise tracks over the existing railway track floor similar to the case of 66678 No. The present invention is not limited to these, and is widely applicable to steel plate-coated reinforced concrete members in civil engineering and building structures.
【００１１】主筋の付着割裂破壊は、主筋に対しコンク
リートが剥離することにより生じるが、本願発明では、
鉄筋コンクリート部材の外周を被覆する鋼板がその面外
方向の曲げ剛性で抵抗し、相対する面の鋼板間を連結す
るスチフナーが鋼板の曲げ剛性を高め、付着割裂破壊を
抑制している。[0011] Adhesive splitting failure of the main reinforcing bar is caused by peeling of concrete from the main reinforcing bar.
The steel plate covering the outer periphery of the reinforced concrete member resists the bending rigidity in the out-of-plane direction, and the stiffener connecting the steel plates on the opposing surfaces increases the bending rigidity of the steel plate and suppresses the adhesive split fracture.
【００１２】スチフナーとしては、通常、鋼板が用いら
れるが、その他、溝形鋼や山形鋼等の形鋼あるいはラチ
ス材等でもよい。スチフナーの配置については、鉄筋コ
ンクリート部材の全長にわたって設ける場合と、一部の
区間にのみ設ける場合とが考えられる。As the stiffener, a steel plate is usually used, but other shapes such as a channel steel or an angle steel or a lattice material may be used. Regarding the arrangement of the stiffener, it is considered that the stiffener is provided over the entire length of the reinforced concrete member, or is provided only in a part of the section.
【００１３】そして、前述のように、鉄筋コンクリート
部材について、少なくともスチフナーを設けた区間につ
いては、主筋を取り巻くせん断補強のための帯筋を省略
する。 As described above , at least the section of the reinforced concrete member provided with the stiffener is provided.
In addition, the band for shear reinforcement surrounding the main bar is omitted.
【００１４】本願発明の補強構造の特徴として、上述の
ように主筋の付着割裂破壊が、外周を被覆する鋼板およ
び相対する面の鋼板間を連結するスチフナーによって抑
制されており、面倒な配筋作業を必要とする帯筋の省略
が可能である。As a feature of the reinforcing structure according to the present invention, as described above, the adhesive split fracture of the main reinforcement is suppressed by the steel plate covering the outer periphery and the stiffener connecting the steel plates on the opposite surfaces, and the troublesome arrangement work of the reinforcement is performed. Can be omitted.
【００１５】請求項２は、外周を被覆補強する鋼板につ
いて、内面にはコンクリートとのずれ止め（すべり止
め）を設けてある場合を限定したものである。ずれ止め
としては内面に突起を有する突起付き鋼板（圧延成形に
よる縞鋼板等）を用いたり、スタッドジベル等のシヤコ
ネクターを溶植する等して、コンクリートとの一体化を
図ることができる。[0015] The second aspect of the present invention limits the case where a steel plate for covering and reinforcing the outer periphery is provided with a slip prevention against the concrete on the inner surface. As a slip stopper, a steel plate having a protrusion on the inner surface (a striped steel plate formed by rolling or the like) can be used, or a shear connector such as a stud dowel can be planted to integrate with concrete.
【００１６】[0016]
【発明の実施の形態】図１〜図３は、それぞれ本願発明
の補強構造の一実施形態を示したものである。1 to 3 show one embodiment of a reinforcing structure of the present invention.
【００１７】図１は、コンクリート２の外周を補強鋼板
４で被覆した外鋼板被覆コンクリート部材１が偏平な断
面形状を有する場合であり、部材断面の弱軸方向に相対
する補強鋼板４間を鋼板からなる２枚のスチフナー５で
連結している。FIG. 1 shows a case where an outer steel sheet-coated concrete member 1 in which the outer periphery of concrete 2 is coated with a reinforcing steel sheet 4 has a flat cross-sectional shape. Are connected by two stiffeners 5 consisting of:
【００１８】外周補強鋼板４としては、偏平な断面形状
を有する角形鋼管等を用いることができ、内面にずれ止
めを有するものが望ましい。As the outer peripheral reinforcing steel plate 4, a rectangular steel pipe or the like having a flat cross section can be used, and it is desirable that the outer peripheral reinforcing steel plate 4 has a slip prevention on the inner surface.
【００１９】このような外鋼板被覆コンクリート部材１
は、例えば外周補強鋼板４としての角形鋼管の内面にス
チフナー５を溶接し、補強鋼板４とスチフナー５で囲ま
れる内側に主筋３を配筋した後、コンクリート２を打設
し、養生するといった工程で製造される。Such a concrete member 1 coated with an outer steel plate
Is, for example, a step of welding a stiffener 5 to the inner surface of a square steel pipe as the outer peripheral reinforcing steel plate 4, arranging the main reinforcing bar 3 on the inner side surrounded by the reinforcing steel plate 4 and the stiffener 5, and then casting and curing the concrete 2. Manufactured in.
【００２０】また、角形鋼管の内面へのスチフナー５の
溶接が難しい場合は、平板状の補強鋼板４とスチフナー
５を、順次、溶接等で組み立てていってもよい。If it is difficult to weld the stiffener 5 to the inner surface of the rectangular steel pipe, the flat reinforcing steel plate 4 and the stiffener 5 may be assembled sequentially by welding or the like.
【００２１】図示したように、鉄筋コンクリート部分の
帯筋を省略している（配筋していない）が、スチフナー
５の存在により帯筋以上の付着割裂破壊抑制効果が得ら
れる。また、鉄筋については、主筋３のみの配筋である
ため、配筋作業が大幅に簡略化される。As shown in the figure, the stirrups in the reinforced concrete portion are omitted (not arranging), but the presence of the stiffener 5 can provide an effect of suppressing adhesion splitting and breaking more than the stirrups. In addition, since the reinforcing bars are provided with only the main bars 3, the bar arranging operation is greatly simplified.
【００２２】図２は、図１の例に対し、スチフナー５の
枚数を３枚に増やし、主筋３の本数を減らした場合であ
る。FIG. 2 shows a case where the number of stiffeners 5 is increased to three and the number of main bars 3 is reduced as compared with the example of FIG.
【００２３】図３は、外鋼板被覆コンクリート部材１の
断面形状が正方形の場合であり、スチフナー５を直交す
る２方向に取り付け、外周補強鋼板４とスチフナー５で
囲まれる部分に主筋３を配筋し、コンクリート２を打設
した場合である。FIG. 3 shows a case where the cross-sectional shape of the outer steel plate-coated concrete member 1 is square. The stiffeners 5 are mounted in two orthogonal directions, and the main reinforcement 3 is arranged in a portion surrounded by the outer peripheral reinforcing steel plate 4 and the stiffener 5. Then, concrete 2 is cast.
【００２４】図４は、本願発明の原理を示したもので、
本願発明における鉄筋付着力補強構造は、割裂力に対
し、外周を被覆している鋼板４の曲げ剛性（Ｅ・Ｉ）
（ここで、Ｅはヤング係数、Ｉは断面２次モーメント）
で抵抗し、鋼板４の曲げ変形量（δv ）を抑制すること
によって、付着力を高めることができる。FIG. 4 shows the principle of the present invention.
In the reinforcing structure of the reinforcing steel according to the present invention, the bending stiffness (E · I) of the steel plate 4 covering the outer periphery against the splitting force.
(Where E is Young's modulus, I is the second moment of area)
By suppressing the amount of bending deformation (δ v ) of the steel sheet 4, the adhesive force can be increased.
【００２５】また、鋼板４の曲げ変形量（δv ）は、外
周を被覆している鋼板４の幅厚比（Ｂ／ｔ）に依存する
ため、幅厚比（Ｂ／ｔ）を小さくする（割裂力ｓに対す
る拘束力を増す）と付着割裂強度は増す結果となる。Further, since the amount of bending deformation (δ v ) of the steel plate 4 depends on the width / thickness ratio (B / t) of the steel plate 4 covering the outer periphery, the width / thickness ratio (B / t) is reduced. (Increasing the binding force against the splitting force s) results in an increase in the bond splitting strength.
【００２６】以上から、幅厚比（Ｂ／ｔ）を小さくする
手段として、例えば図１〜図３のような形で、スチフナ
ー５を外周を被覆している鋼板４に取り付けることで、
実質的に幅厚比（Ｂ／ｔ）を小さくすることができ、付
着力を補強することができる。As described above, as a means for reducing the width-thickness ratio (B / t), for example, the stiffener 5 is attached to the steel plate 4 covering the outer periphery in the form shown in FIGS.
The width / thickness ratio (B / t) can be substantially reduced, and the adhesive force can be reinforced.
【００２７】図５は、１柱１杭基礎構造に適用した場合
の先願である特願平６−１６６６７８号の構造（ケース
１）と本願発明の補強構造（ケース２）の付着試験に用
いた供試体１０（縮小模型）の説明図であり、(a) は右
半分がケース１の鉛直断面、左半分がケース２の側面、
(b) は右半分がケース１の鉛直断面、左半分がケース２
の正面、(c) はケース１の鉄骨柱１８と杭１１の接合部
の水平断面、(d) はケース２の鉄骨柱１８と杭１１の接
合部の水平断面を示している。FIG. 5 shows an adhesion test between the structure of Japanese Patent Application No. 6-166678 (Case 1), which is a prior application, and the reinforcing structure (Case 2) of the present invention when applied to a one-column, one-pile foundation structure. It is an explanatory view of the test sample 10 (reduced model) which was shown, (a), the right half is a vertical section of the case 1, the left half is the side of the case 2,
In (b), the right half is the vertical section of Case 1 and the left half is Case 2.
(C) shows a horizontal section of the joint between the steel column 18 and the pile 11 of the case 1, and (d) shows a horizontal section of the junction between the steel column 18 and the pile 11 of the case 2.
【００２８】ケース１は、特願平６−１６６６７８号の
構造に相当するものであり、外周補強鋼板１４を有する
杭１１部分については、鉄骨柱１８と外周補強鋼板１４
との間をスチフナー１７で連結し、その両側については
鉄筋コンクリート構造の通常の配筋方法である主筋１３
と帯筋１６からなる配筋を行っている。The case 1 corresponds to the structure of Japanese Patent Application No. 6-166678. The pile 11 having the outer peripheral reinforcing steel plate 14 has a steel column 18 and an outer peripheral reinforcing steel plate 14.
Are connected by a stiffener 17, and on both sides thereof, a main reinforcing bar 13 which is a normal reinforcing method of a reinforced concrete structure is used.
And a bar arrangement 16.
【００２９】ケース２は、本願発明の構造に相当するも
のであり、弱軸方向について、間隔をおいてスチフナー
１５で相対する鋼板１４どうしを連結し、外周補強鋼板
１４によるコンクリート１２の拘束効果を高め、主筋１
３の付着割裂破壊を抑制する構造となっている。また、
帯筋１６は用いていない。The case 2 corresponds to the structure of the present invention, and connects the steel plates 14 facing each other with a stiffener 15 at a distance in the weak axis direction, thereby reducing the restraining effect of the outer peripheral reinforcing steel plate 14 on the concrete 12. Raise the main bar 1
3 has a structure that suppresses the adhesive split fracture. Also,
The stirrup 16 is not used.
【００３０】図６は、図５の供試体１０についての付着
試験結果の一つとして、柱頭水平力Ｑと柱頭水平変形量
δT の関係を示したものである。FIG. 6 shows the relationship between the horizontal capital Q and the horizontal deformation δ T as one of the results of the adhesion test on the specimen 10 of FIG.
【００３１】ケース１では主筋１３が降伏し、接合部天
端位置で鉄骨柱１８が曲げ降伏した後、全体の主筋１３
が付着割裂破壊して最大耐力が決まり、ケース２ではス
チフナー１５間の一部主筋１３のみ付着割裂破壊し、柱
頭水平変形量が２００mmに達した時点で実験を終了し
た。In the case 1, the main reinforcing bar 13 yields, and the steel column 18 bends and yields at the joint top position.
, And the maximum proof stress was determined. In Case 2, only the main reinforcement 13 between the stiffeners 15 was subjected to adhesive splitting failure, and the experiment was terminated when the horizontal deformation of the stigma reached 200 mm.
【００３２】また、図中、破線で示したものは、付着割
裂破壊を拘束しない場合の計算値である。In the figure, the values indicated by broken lines are calculated values when bond splitting fracture is not restricted.
【００３３】これらから、本願発明における付着割裂破
壊の抑制効果が確認された。From these, it was confirmed that the effect of suppressing the adhesive splitting fracture in the present invention was obtained.
【００３４】 鉄筋コンクリート部材の外周を鋼板で
被覆し、相対する面の鋼板をスチフナーで連結すること
で鋼板の曲げ剛性が高まり、その結果、外周補強鋼板に
よる内側のコンクリートの拘束効果が高まり、主筋とコ
ンクリート間の付着割裂破壊が抑制され、すなわち鉄筋
のコンクリート付着力が補強でき、部材耐力、じん性の
向上が図れる。[0034] Covering the outer periphery of the reinforced concrete member with a steel plate, and connecting the steel plates on opposing surfaces with a stiffener.
Increases the bending stiffness of the steel sheet, and as a result,
The effect of the concrete on the inside is increased,
Bond Splitting breakdown between Nkurito is suppressed, i.e. concrete adhesive force you to reinforcing rebar, parts material yield strength, improvement of toughness achieved.
【００３５】 スチフナーはあらかじめ工場で外周の
鋼板と一体化することで、現場作業が容易となり、また
帯筋の省略により配筋作業が大幅に簡略化される。The stiffener is previously integrated with the steel plate on the outer periphery at the factory, thereby facilitating the on-site work, and the omission of the stirrup greatly simplifies the reinforcing work.
【００３６】 外周補強鋼板によるコンクリートの拘
束により、コンクリート部分の耐力が増し、さらに外周
補強鋼板の内面にずれ止めを設けることで、外周補強鋼
板とコンクリートとの間に付着力が生じ、コンクリート
の拘束効果が増す。[0036] The restraint of the concrete by the outer peripheral reinforcing steel plate increases the strength of the concrete portion, and furthermore, by providing a slip stopper on the inner surface of the outer peripheral reinforcing steel plate, an adhesive force is generated between the outer peripheral reinforcing steel plate and the concrete, and the concrete is restrained. The effect increases.
【図１】 本願発明の一実施形態を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】 本願発明の他の実施形態を示す断面図であ
る。FIG. 2 is a cross-sectional view showing another embodiment of the present invention.
【図３】 本願発明のさらに他の実施形態を示す断面図
である。FIG. 3 is a sectional view showing still another embodiment of the present invention.
【図４】 本願発明の補強構造の作用に関する説明図で
ある。FIG. 4 is an explanatory diagram relating to the operation of the reinforcing structure of the present invention.
【図５】 １柱１杭基礎構造に適用した場合の本願発明
の補強構造と、先願である特願平６−１６６６７８号の
構造の付着試験に用いた供試体の説明図である。FIG. 5 is an explanatory view of a reinforcing structure according to the present invention when applied to a one-pillar one-pile foundation structure and a specimen used for an adhesion test of the structure of Japanese Patent Application No. 6-166678, which is a prior application.
【図６】 付着試験結果を柱頭水平力と柱頭水平変形量
との関係で比較したグラフである。FIG. 6 is a graph comparing the results of the adhesion test in relation to the capital of the capital and the amount of horizontal deformation of the capital.
１…鋼板被覆コンクリート部材、２…コンクリート、３
…主筋、４…外周補強鋼板、５…スチフナー、１０…供
試体、１１…杭部分、１２…コンクリート、１３…主
筋、１４…外周補強鋼板、１５…スチフナー、１６…帯
筋、１７…スチフナー、１８…鉄骨柱、１９…固定用フ
ーチング部1: steel plate-coated concrete member, 2: concrete, 3
... Main reinforcement, 4 ... Outer peripheral reinforcement steel plate, 5 ... Stiffener, 10 ... Test specimen, 11 ... Pile part, 12 ... Concrete, 13 ... Main reinforcement, 14 ... Outer peripheral reinforcement steel plate, 15 ... Stiffener, 16 ... Strip reinforcement, 17 ... Stiffener, 18 ... steel column, 19 ... footing for fixing
───────────────────────────────────────────────────── フロントページの続き (72)発明者 石橋 輝樹 東京都国分寺市光町２丁目８番地38 財 団法人鉄道総合技術研究所内 (72)発明者 蓮田 常雄 東京都国分寺市光町２丁目８番地38 財 団法人鉄道総合技術研究所内 (72)発明者 宍戸 唯一 大阪市中央区北浜４丁目５番33号 住友 金属工業株式会社内 (72)発明者 高田 啓一 大阪市中央区北浜４丁目５番33号 住友 金属工業株式会社内 (72)発明者 原田 昭穂 東京都千代田区大手町２丁目６番３号 新日本製鐵株式会社内 (72)発明者 吉田 映 東京都千代田区丸の内１丁目１番２号 日本鋼管株式会社内 (56)参考文献 特開 平３−2454（ＪＰ，Ａ) 特開 昭63−272845（ＪＰ，Ａ) 特開 平７−26568（ＪＰ，Ａ) 実開 平５−61314（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) E02D 5/30 E02D 27/12 E04B 1/16 E04C 3/293 E04C 3/34 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Teruki Ishibashi 2-8-8 Hikaricho, Kokubunji-shi, Tokyo 38 Inside the Railway Technical Research Institute (72) Tsuneo Hasuda 2-8-8 Hikaricho, Kokubunji-shi, Tokyo 38 Inside the Railway Technical Research Institute (72) Inventor Shishido is the only 4-5-33 Kitahama, Chuo-ku, Osaka City Inside Sumitomo Metal Industries, Ltd. (72) Inventor Keiichi Takada 4-5-33 Kitahama, Chuo-ku, Osaka City No. Sumitomo Metal Industries Co., Ltd. (72) Inventor Akiho Harada 2-6-3 Otemachi, Chiyoda-ku, Tokyo Nippon Steel Corporation (72) Inventor Akira Yoshida 1-1-2, Marunouchi, Chiyoda-ku, Tokyo No. Nippon Kokan Co., Ltd. (56) References JP-A-3-2454 (JP, A) JP-A-63-272845 (JP, A) JP-A-7-26568 (JP, A) Hei 5-61314 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) E02D 5/30 E02D 27/12 E04B 1/16 E04C 3/293 E04C 3/34
Claims (2)
た鉄筋コンクリート部材の外周の全面または一部を外周
補強鋼板で被覆し、前記外周補強鋼板の相対する面の鋼
板間をコンクリート断面内に配した前記鋼板の曲げ剛性
を高めるためのスチフナーで連結することにより、外周
補強鋼板による内側のコンクリートの拘束効果を高め、
かつ長手方向の少なくとも前記スチフナーを設けた区間
については帯筋を設けることなく、前記主筋とコンクリ
ート間の付着割裂破壊を抑制するよう構成したことを特
徴とする鉄筋コンクリート部材の鉄筋付着力補強構造。1. A reinforced concrete member having a plurality of main reinforcing bars extending in a longitudinal direction, the entire outer periphery or a part of the outer periphery is covered with an outer peripheral reinforcing steel plate. By connecting with a stiffener for increasing the bending rigidity of the arranged steel plate, the effect of restraining the inner concrete by the outer peripheral reinforcing steel plate is increased,
And a section provided with at least the stiffener in the longitudinal direction
The reinforcing structure for reinforcing a reinforcing bar of a reinforced concrete member, wherein the reinforcing bar is provided so as to suppress the bond splitting failure between the main bar and the concrete without providing a reinforcing bar.
れ止めを設けてある請求項１記載の鉄筋コンクリート部
材の鉄筋付着力補強構造。2. A rebar adhesion reinforcement structure of the concrete member according to claim 1, wherein the displacement preventing is provided between the concrete on the inner surface of the steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07183083A JP3129636B2 (en) | 1995-07-19 | 1995-07-19 | Adhesive reinforcement structure for reinforced concrete members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07183083A JP3129636B2 (en) | 1995-07-19 | 1995-07-19 | Adhesive reinforcement structure for reinforced concrete members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0931974A JPH0931974A (en) | 1997-02-04 |
| JP3129636B2 true JP3129636B2 (en) | 2001-01-31 |
Family
ID=16129472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07183083A Expired - Fee Related JP3129636B2 (en) | 1995-07-19 | 1995-07-19 | Adhesive reinforcement structure for reinforced concrete members |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3129636B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11566800B2 (en) | 2019-03-19 | 2023-01-31 | Lg Electronics Inc. | Air purifier and air purifying system |
| US11623173B2 (en) | 2019-03-19 | 2023-04-11 | Lg Electronics Inc. | Air purifier, air purifying system, and method of controlling air purifying system |
| US11629873B2 (en) | 2019-03-19 | 2023-04-18 | Lg Electronics Inc. | Air purifying system and method for controlling the air purifying system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590397B (en) * | 2012-08-13 | 2016-03-30 | 上海中技桩业股份有限公司 | A kind of partial prestressing part non-prestressed concrete hollow square pile |
-
1995
- 1995-07-19 JP JP07183083A patent/JP3129636B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11566800B2 (en) | 2019-03-19 | 2023-01-31 | Lg Electronics Inc. | Air purifier and air purifying system |
| US11623173B2 (en) | 2019-03-19 | 2023-04-11 | Lg Electronics Inc. | Air purifier, air purifying system, and method of controlling air purifying system |
| US11629873B2 (en) | 2019-03-19 | 2023-04-18 | Lg Electronics Inc. | Air purifying system and method for controlling the air purifying system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0931974A (en) | 1997-02-04 |
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