JP2004332338A - Reinforced structure of concrete member having opening and reinforcing method - Google Patents

Reinforced structure of concrete member having opening and reinforcing method Download PDF

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Publication number
JP2004332338A
JP2004332338A JP2003128421A JP2003128421A JP2004332338A JP 2004332338 A JP2004332338 A JP 2004332338A JP 2003128421 A JP2003128421 A JP 2003128421A JP 2003128421 A JP2003128421 A JP 2003128421A JP 2004332338 A JP2004332338 A JP 2004332338A
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Japan
Prior art keywords
steel pipe
opening
concrete member
reinforcing
adhesive
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JP2003128421A
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Japanese (ja)
Inventor
Hideo Katsumata
英雄 勝俣
Kazuki Shirai
和貴 白井
Kozo Kimura
耕三 木村
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Obayashi Corp
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Obayashi Corp
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Priority to JP2003128421A priority Critical patent/JP2004332338A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforced structure of a concrete member having an opening capable of effectively reinforcing the concrete member having the opening without carrying out site welding. <P>SOLUTION: A steel pipe section 16 of a collar steel pipe 14 is inserted into the opening 12 bored in the existing beam 10 and is adhered with an adhesive 20. A collar plate 22 is mounted on the circumference of a projected part from the opening 12 of the steel pipe section 16. In one execution form, the steel pipe section 16 is inserted in a through-hole 22a of the collar plate 22, and the insertion section is adhered with an adhesive 24 of epoxy resin containing metal powder. In the other execution form, a screw cutting is made in the inner circumference of the through-hole 22a to mount it by screwing to the outer circumference of the steel pipe section 16. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、開口を有するコンクリート部材の補強構造および補強方法に係り、特に、コンクリート部材の開口部に鋼管を挿通して補強を行う構造および方法に関する。
【０００２】
【従来の技術】
既存建物の改修工事では、既存梁に配管等を通すため開口を穿つ場合がある。その場合、開口部において既存梁の強度が低下してしまうため、既存梁に何らかの補強を行うことが必要である。例えば特許文献１に開示される既存梁の補強方法では、既存梁に設けられた開口部に補強体を挿入することで、その開口部を補強している。図５は、この補強方法の概要を表す断面図である。同図に示すように、既存梁５０の補強に用いられる補強体５２は、筒状部５４と、筒状部５４の一端に設けられたつば板５６とを備えている。既存梁５０に設けられた開口５８の両側から、補強体５２の筒状部５４を挿入し、つば板５６をボルト６０で既存梁５０に締め付けると共に、つば板５６と既存梁５０の表面との間および筒状部５４と開口５８の内周面との間に接着剤を充填して、補強体５２を既存梁５０に固定する。
【０００３】
かかる補強方法によれば、既存梁５０の開口５８に圧縮力やせん断力が作用した場合に、この力を補強体５２の筒状部５４で受けることができるので、開口５８の周辺にひび割れなどの損傷が生ずるのを防止できる。また、筒状部５４の端部につば板５６が設けられていることで、補強体５２の強度が向上され、これにより筒状部５４の肉厚を小さく抑えることが可能となっている。
【０００４】
【特許文献１】
特開平５−３１１８９１号公報
【０００５】
【発明が解決しようとする課題】
しかしながら、上記の補強方法では開口５８に両側から２本の筒状部５４が挿入されるので、開口５８内部の筒状体は中央で分割された構成になる。このため、圧縮に対する筒状体の抵抗力が低下し、その分、補強効果が損なわれてしまう。
【０００６】
かかる問題を回避するため、図６に示すように、筒状部５４の先端を開口５８の反対側（図中右側）まで延長させて、つば板６２を溶接部６４において筒状部５４に現場で溶接することも考えられる。しかしながら、現場溶接では火花が飛び散るため、安全性の面から改修工事に適用することは好ましくない。
【０００７】
本発明は上記の点に鑑みてなされたものであり、現場溶接を行うことなく、開口を有するコンクリート部材を効果的に補強できるようにすることを目的とする。
【０００８】
【課題を解決するための手段】
上記の目的を達成するため、請求項１に記載された発明は、開口を有するコンクリート部材の補強構造であって、前記開口に鋼管が挿通されていると共に、当該鋼管には、前記コンクリート部材を両側から挟むようにつば板が設けられており、少なくとも一方のつば板はその中央部に設けられた貫通孔に前記鋼管が挿通され、この挿通部において接着剤により前記鋼管に接着されていることを特徴とする。
【０００９】
本発明によれば、コンクリート部材の開口に挿通される鋼管には、コンクリート部材を両側から挟むように２枚のつば板が取り付けられているので、これらつば板により鋼管が補強される。また、少なくとも一方のつば板は接着剤により鋼管に接着されるので、他方のつば板が設けられた鋼管を上記開口部に挿通させた後、現場でつば板を鋼管に接着することができる。したがって、本発明によれば、現場溶接を行うことなく、開口を有するコンクリート部材の補強を効果的に行うことができる。なお、本願発明において、コンクリート部材には、鉄筋コンクリート部材および鉄骨鉄筋コンクリート部等が含まれる。
【００１０】
また、請求項２に記載された発明は、請求項１記載の開口を有するコンクリート部材の補強構造において、前記接着剤は、金属粉入りの接着剤であることを特徴とする。
【００１１】
本発明によれば、つば板を金属粉入りの接着剤で鋼管に接着することで、つば板と鋼管との十分な接合強度が得られる。したがって、つば板と鋼管との間の応力伝達が確実に行われるようになり、これにより、補強効果は更に向上する。
【００１２】
また、請求項３に記載された発明は、開口を有するコンクリート部材の補強構造であって、前記開口に鋼管が挿通されていると共に、当該鋼管には、前記コンクリート部材を両側から挟むようにつば板が設けられており、少なくとも一方のつば板はその中央部に設けられた貫通孔の内縁がねじ切りされ、このねじ切り部が前記鋼管の外周面に設けられたねじ切り部にねじ込まれることにより前記鋼管に取り付けられていることを特徴とする。
【００１３】
本発明によれば、コンクリート部材の開口に挿通される鋼管には、コンクリート部材を両側から挟むように２枚のつば板が取り付けられているので、これらつば板により鋼管が補強される。また、少なくとも一方のつば板は鋼管にねじ込まれることにより鋼管に取り付けられるので、他方のつば板が設けられた鋼管を上記開口部に挿通させた後、つば板を鋼管にねじ込むことができる。したがって、本発明によれば、現場溶接を行うことなく、開口部を有するコンクリート部材の補強を効果的に行うことができる。また、つば板をコンクリート部材の表面に締め付けるようにねじ込むことで、鋼管に軸力を導入することができる。この場合、コンクリートが２枚のつば板の間で拘束されることにより補強効果は更に向上する。
【００１４】
また、請求項４に記載された発明は、開口を有するコンクリート部材の補強方法であって、前記開口に、つば付き鋼管をその先端が前記開口の反対側から突出するように挿通し、その突出部において前記つば付き鋼管の外周につば板を接着剤で接着することを特徴とする。
【００１５】
また、請求項５に記載された発明は、開口を有するコンクリート部材の補強方法であって、前記開口に、つば付き鋼管をその先端が前記開口の反対側から突出するように挿通し、その突出部において前記つば付き鋼管の外周に設けられたねじ切り部に、内縁にねじ切り部が設けられた貫通孔を有するつば板をねじ込むことを特徴とする。
【００１６】
【発明の実施の形態】
図１は、本発明の第１の実施形態である補強構造を示す断面図である。また、図２は図１の矢印ＩＩの向きから見た正面図である。
図１および図２に示すように、本実施形態では、鉄筋コンクリートあるいは鉄骨鉄筋コンクリートの既存梁１０に円形の開口１２が設けられており、この既存梁１０の開口１２をつば付き鋼管１４を用いて補強する。つば付き鋼管１４は、鋼管部１６と、この鋼管部１６の一端に設けられたつば板１８とを有している。かかるつば付き鋼管１４の鋼管部１６を開口１２に挿入し、鋼管部１６の外周面と開口１２の内周面との間、および、つば板１８の裏面と既存梁１０の表面との間を夫々エポキシ樹脂系等の適宜な接着剤２０で接着する。なお、接着剤２０は、鋼管部１６を挿入する前に各接着面に予め塗布しておくものとする。つば付き鋼管１４は、既存梁１０の幅よりも少し大きな長さに設計されており、上記のように鋼管部１６が開口１２に挿入されると、鋼管部１６の先端が開口１２の反対側から突出する。この鋼管部１６の突出部分の外周につば板２２を取り付ける。つば板２２は中央部に鋼管部１６の外径よりも僅かに大きな径を有する貫通孔２２ａを備える円盤状の鋼板材であり、貫通孔２２ａに鋼管部１６が挿通され、この挿通部分の隙間に、例えば、金属粉入りのエポキシ樹脂系の接着剤２４（例えばアイ・ティ・ダブリュー・インダストリー株式会社製ＨＲ−３００など）が充填されることで、つば板２２が鋼管部１６に接着される。また、つば板２２の裏面は上記の接着剤２０により既存梁１０に接着される。なお、つば板２２の形状は円盤状に限らず、例えば三角形や四角形等の多角形状に構成されていてもよい。
【００１７】
以上のように、本実施形態では、開口１２に一本の鋼管部１６が挿通され、既存梁１０を両端から挟むようにつば板１８，２２が鋼管部１６に取り付けられた構成となる。このため、両側のつば板１８，２２により鋼管部１６が補強されるうえ、開口１２の内部で鋼管部１６が分割されることがないので、既存梁１０の圧縮力やせん断力に対して、鋼管部１６は十分に大きな抵抗力を発揮する。したがって、本実施形態によれば、開口１２を有する既存梁１０を効果的に補強することができる。
【００１８】
また、本実施形態では、つば板２２を接着材２４で鋼管部１６に接着するので、現場溶接を行うことが不要である。このため、現場での補強作業の安全性が高まり、改修工事への適用が可能となる。また、接着剤２４として金属粉入りの接着剤を用いているので、大きな接着強度が得られる。このため、つば板２２と鋼管部１６との間の応力伝達が確実に行われることとなり、つば板２２による鋼管部１６の補強効果を確保できる。
【００１９】
次に、本発明の第２の実施形態について説明する。図３は、本発明の第２の実施形態である補強構造の断面図である。また、図４は、図３の矢印ＩＶの向きから見た正面図である。なお、図３および図４において、上記図１および図２と同様の構成部分には同一の符号を付して説明を省略する。
【００２０】
本実施形態では、つば付き鋼管１４の鋼管部１６の先端部分の外周面と、つば板２２の貫通孔２２ａの内周にねじ切りしておく。そして、鋼管部１６を開口１２に挿入して接着剤２０で接着した後、つば板２２の貫通孔２２ａを鋼管部１６の外周のねじ切り部１６ａにねじ込んで、既存梁１０の表面へ締め付ける。なお、つば板２２の緩みを防止するため、つば板２２の裏面と既存梁１０の表面とを接着剤で接着することとしてもよく、また、つば板２２と既存梁１０との間にワッシャを介装してもよい。
【００２１】
本実施形態でも、上記第１実施形態と同様に、開口１２に挿通された一本の鋼管部１６に、既存梁１０を両端から挟むようにつば板１８，２２が取り付けられた構成となるので、開口１２を有する既存梁１０を効果的に補強することができる。そして、つば板２２を鋼管部１６へねじ込むことで両者間の応力伝達が確実に行われ、つば板２２による補強効果を確保できる。したがって、本実施形態でも、現場溶接を行うことなく、既存梁１０を効果的に補強することができる。
【００２２】
また、本実施形態では、つば板２２を既存梁１０の表面へ締め付けることにより、鋼管部１６へ軸力を導入できる。このため、２つのつば板が既存梁１０のコンクリートに圧着されてコンクリートが拘束されることにより、補強効果は更に向上する。
【００２３】
なお、上記各実施形態では、本発明が既存梁１０の補強に適用された場合について説明したが、既存梁に限らず、開口を有する鉄筋コンクリートや鉄骨鉄筋コンクリート等のコンクリート部材一般の補強へ適用が可能である。
【００２４】
また、上記各実施形態では、つば付き鋼管１４を用いて、その鋼管部１６に他方のつば板２２を接着またはねじ込むことにより取り付ける構成としたが、２枚のつば板の両方を鋼管に接着またはねじ込みにより取り付ける構成も本発明の範囲に含まれる。その場合、一方のつば板を鋼管に接着し、他方のつば板を鋼管にねじ込むことにより取り付けることも本発明の範囲に含まれる。
【００２５】
さらに、上記各実施形態では既存梁１０の開口１２が円形であるものとしたが、上記第１実施形態のようにつば板２２を接着する構成は、矩形の開口１２に角型の鋼管を挿通させて補強を行う場合にも適用が可能であり、そのような矩形開口を有するコンクリート部材を補強する構成も本発明の範囲に含まれる。
【００２６】
【発明の効果】
本発明によれば、現場溶接を行うことなく、開口部を有するコンクリート部材を効果的に補強することができる。
【図面の簡単な説明】
【図１】本発明の第１の実施形態である補強構造を示す断面図である。
【図２】図１の矢印ＩＩの向きから見た正面図である。
【図３】本発明の第２の実施形態である補強構造を示す断面図である。
【図４】図３の矢印ＩＶの向きから見た正面図である。
【図５】従来の既存梁の補強構造を示す断面図である。
【図６】図５の補強構造の変形例を示す断面図である。
【符号の説明】
１０ 既存梁
１２ 開口
１４ つば付き鋼管
１６ 鋼管部
１８ つば板
２０ 接着剤
２２ つば板
２４ 接着剤[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a reinforcing structure and a reinforcing method for a concrete member having an opening, and more particularly, to a structure and a method for reinforcing by inserting a steel pipe into an opening of a concrete member.
[0002]
[Prior art]
In the renovation work of existing buildings, openings may be drilled to pass pipes etc. through existing beams. In that case, the strength of the existing beam is reduced at the opening, so it is necessary to provide some reinforcement to the existing beam. For example, in the method of reinforcing an existing beam disclosed in Patent Literature 1, the opening is reinforced by inserting a reinforcing member into an opening provided in the existing beam. FIG. 5 is a cross-sectional view illustrating the outline of the reinforcing method. As shown in the figure, the reinforcing body 52 used for reinforcing the existing beam 50 includes a tubular portion 54 and a flange plate 56 provided at one end of the tubular portion 54. The cylindrical portion 54 of the reinforcing member 52 is inserted from both sides of the opening 58 provided in the existing beam 50, and the flange plate 56 is fastened to the existing beam 50 with bolts 60. The reinforcing member 52 is fixed to the existing beam 50 by filling an adhesive between the space and the cylindrical portion 54 and the inner peripheral surface of the opening 58.
[0003]
According to such a reinforcing method, when a compressive force or a shearing force is applied to the opening 58 of the existing beam 50, the force can be received by the cylindrical portion 54 of the reinforcing member 52, and therefore, cracks and the like around the opening 58. Can be prevented from being damaged. In addition, since the flange plate 56 is provided at the end of the tubular portion 54, the strength of the reinforcing member 52 is improved, so that the thickness of the tubular portion 54 can be reduced.
[0004]
[Patent Document 1]
JP-A-5-318991
[Problems to be solved by the invention]
However, in the above-described reinforcing method, since the two tubular portions 54 are inserted into the opening 58 from both sides, the tubular body inside the opening 58 is divided at the center. For this reason, the resistance of the cylindrical body to compression is reduced, and the reinforcing effect is correspondingly impaired.
[0006]
In order to avoid such a problem, as shown in FIG. 6, the distal end of the tubular portion 54 is extended to the opposite side (right side in the figure) of the opening 58, and the flange plate 62 is welded to the tubular portion 54 at the welded portion 64. Welding is also conceivable. However, since sparks are scattered in the field welding, it is not preferable to apply the present invention to repair work from the viewpoint of safety.
[0007]
The present invention has been made in view of the above points, and an object of the present invention is to enable a concrete member having an opening to be effectively reinforced without performing on-site welding.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is a reinforcing structure for a concrete member having an opening, wherein a steel pipe is inserted through the opening, and the concrete member is inserted into the steel pipe. A flange plate is provided so as to be sandwiched from both sides, and the steel pipe is inserted into a through hole provided in a central portion of at least one of the flange plates, and the steel pipe is bonded to the steel pipe with an adhesive at this insertion portion. It is characterized by.
[0009]
According to the present invention, since the steel pipe inserted into the opening of the concrete member is provided with the two flange plates so as to sandwich the concrete member from both sides, the steel pipe is reinforced by the flange plates. Further, since at least one of the brim plates is bonded to the steel pipe by the adhesive, the brim plate can be bonded to the steel pipe at the site after the steel pipe provided with the other brim plate is inserted through the opening. Therefore, according to the present invention, it is possible to effectively reinforce a concrete member having an opening without performing on-site welding. In the present invention, the concrete member includes a reinforced concrete member, a steel reinforced concrete part, and the like.
[0010]
The invention described in claim 2 is the reinforcing structure for a concrete member having an opening according to claim 1, wherein the adhesive is an adhesive containing metal powder.
[0011]
ADVANTAGE OF THE INVENTION According to this invention, sufficient joining strength of a brim board and a steel pipe is obtained by bonding a brim board to a steel pipe with the adhesive agent containing metal powder. Therefore, stress transmission between the brim plate and the steel pipe is ensured, and the reinforcing effect is further improved.
[0012]
The invention according to claim 3 is a reinforcing structure for a concrete member having an opening, wherein a steel pipe is inserted through the opening, and the steel pipe has a collar so as to sandwich the concrete member from both sides. A plate is provided, and at least one of the brim plates is threaded at an inner edge of a through hole provided at a central portion thereof, and the threaded portion is screwed into a threaded portion provided on an outer peripheral surface of the steel tube. It is characterized by being attached to.
[0013]
According to the present invention, since the steel pipe inserted into the opening of the concrete member is provided with the two flange plates so as to sandwich the concrete member from both sides, the steel pipe is reinforced by the flange plates. Further, since at least one of the brim plates is attached to the steel pipe by being screwed into the steel pipe, the brim plate can be screwed into the steel pipe after the steel pipe provided with the other brim plate is inserted through the opening. Therefore, according to the present invention, a concrete member having an opening can be effectively reinforced without performing on-site welding. Further, by screwing the brim plate so as to be fastened to the surface of the concrete member, an axial force can be introduced into the steel pipe. In this case, the reinforcing effect is further improved by the concrete being restrained between the two brim plates.
[0014]
The invention described in claim 4 is a method for reinforcing a concrete member having an opening, wherein a flanged steel pipe is inserted into the opening such that the tip projects from the opposite side of the opening, and the protrusion is formed. A flange plate is adhered to an outer periphery of the flanged steel pipe with an adhesive in the portion.
[0015]
The invention described in claim 5 is a method of reinforcing a concrete member having an opening, wherein a flanged steel pipe is inserted into the opening so that the tip projects from the opposite side of the opening, and the protrusion is formed. A flange plate having a through hole provided with a threaded portion on an inner edge thereof is screwed into a threaded portion provided on an outer periphery of the flanged steel pipe.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a sectional view showing a reinforcing structure according to the first embodiment of the present invention. FIG. 2 is a front view as viewed from the direction of arrow II in FIG.
As shown in FIGS. 1 and 2, in the present embodiment, a circular opening 12 is provided in an existing beam 10 of reinforced concrete or steel-framed reinforced concrete, and the opening 12 of the existing beam 10 is reinforced using a steel pipe 14 with a collar. I do. The flanged steel pipe 14 has a steel pipe portion 16 and a flange plate 18 provided at one end of the steel pipe portion 16. The steel pipe portion 16 of the flanged steel pipe 14 is inserted into the opening 12, and between the outer peripheral surface of the steel pipe portion 16 and the inner peripheral surface of the opening 12, and between the back surface of the brim plate 18 and the surface of the existing beam 10. Each is bonded with an appropriate adhesive 20 such as an epoxy resin. Note that the adhesive 20 is applied to each bonding surface in advance before inserting the steel pipe portion 16. The flanged steel pipe 14 is designed to have a length slightly larger than the width of the existing beam 10, and when the steel pipe part 16 is inserted into the opening 12 as described above, the tip of the steel pipe part 16 is opposite to the opening 12. Project from A flange plate 22 is attached to the outer periphery of the projecting portion of the steel pipe portion 16. The flange plate 22 is a disk-shaped steel plate provided with a through hole 22a having a diameter slightly larger than the outer diameter of the steel pipe portion 16 at the center, and the steel pipe portion 16 is inserted into the through hole 22a. Is filled with, for example, an epoxy resin-based adhesive 24 containing metal powder (for example, HR-300 manufactured by ITW Industry Co., Ltd.), so that the brim plate 22 is bonded to the steel pipe portion 16. . Further, the back surface of the brim plate 22 is bonded to the existing beam 10 by the adhesive 20 described above. The shape of the brim plate 22 is not limited to a disk shape, but may be a polygonal shape such as a triangle or a quadrangle.
[0017]
As described above, in the present embodiment, one steel pipe portion 16 is inserted into the opening 12, and the flange plates 18 and 22 are attached to the steel pipe portion 16 so as to sandwich the existing beam 10 from both ends. Therefore, the steel pipe portion 16 is reinforced by the brim plates 18 and 22 on both sides, and the steel pipe portion 16 is not divided inside the opening 12. The steel pipe portion 16 exhibits a sufficiently large resistance. Therefore, according to the present embodiment, the existing beam 10 having the opening 12 can be effectively reinforced.
[0018]
Further, in this embodiment, since the brim plate 22 is bonded to the steel pipe portion 16 with the adhesive 24, it is not necessary to perform on-site welding. For this reason, the safety of reinforcement work on site is enhanced, and application to repair work is possible. Further, since an adhesive containing metal powder is used as the adhesive 24, a large adhesive strength can be obtained. For this reason, the stress transmission between the brim plate 22 and the steel pipe portion 16 is reliably performed, and the reinforcing effect of the brim plate 22 on the steel pipe portion 16 can be secured.
[0019]
Next, a second embodiment of the present invention will be described. FIG. 3 is a sectional view of a reinforcing structure according to a second embodiment of the present invention. FIG. 4 is a front view as viewed from the direction of arrow IV in FIG. In FIGS. 3 and 4, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.
[0020]
In the present embodiment, the outer peripheral surface of the tip portion of the steel pipe portion 16 of the flanged steel pipe 14 and the inner periphery of the through hole 22 a of the flange plate 22 are threaded. Then, after inserting the steel pipe portion 16 into the opening 12 and bonding with the adhesive 20, the through hole 22 a of the brim plate 22 is screwed into the threaded portion 16 a on the outer periphery of the steel pipe portion 16, and tightened to the surface of the existing beam 10. In order to prevent the brim plate 22 from loosening, the back surface of the brim plate 22 and the surface of the existing beam 10 may be bonded with an adhesive, and a washer may be provided between the brim plate 22 and the existing beam 10. You may interpose.
[0021]
Also in the present embodiment, similar to the first embodiment, the brim plates 18 and 22 are attached to the single steel pipe portion 16 inserted into the opening 12 so as to sandwich the existing beam 10 from both ends. The existing beam 10 having the opening 12 can be effectively reinforced. Then, by screwing the collar plate 22 into the steel pipe portion 16, stress transmission between the two is reliably performed, and the reinforcing effect of the collar plate 22 can be secured. Therefore, also in this embodiment, the existing beam 10 can be effectively reinforced without performing on-site welding.
[0022]
Further, in the present embodiment, an axial force can be introduced into the steel pipe portion 16 by fastening the brim plate 22 to the surface of the existing beam 10. For this reason, the reinforcing effect is further improved by pressing the two brim plates against the concrete of the existing beam 10 and restraining the concrete.
[0023]
In each of the above embodiments, the case where the present invention is applied to reinforcement of the existing beam 10 has been described. However, the present invention is not limited to the existing beam, and can be applied to general reinforcement of concrete members such as reinforced concrete having openings and steel reinforced concrete. It is.
[0024]
Further, in each of the above embodiments, the other flange plate 22 is attached to the steel pipe portion 16 by bonding or screwing the steel pipe portion 16 using the flanged steel pipe 14, but both the two flange plates are bonded to the steel pipe. A configuration for mounting by screwing is also included in the scope of the present invention. In this case, it is also within the scope of the present invention to attach one of the brim plates to the steel pipe and screw the other brim plate to the steel pipe.
[0025]
Further, in each of the above embodiments, the opening 12 of the existing beam 10 is circular. However, as in the first embodiment, the configuration in which the flange plate 22 is bonded is such that a rectangular steel pipe is inserted into the rectangular opening 12. The present invention can also be applied to the case where reinforcement is performed by reinforcing the concrete member, and a configuration for reinforcing a concrete member having such a rectangular opening is also included in the scope of the present invention.
[0026]
【The invention's effect】
According to the present invention, a concrete member having an opening can be effectively reinforced without performing on-site welding.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a reinforcing structure according to a first embodiment of the present invention.
FIG. 2 is a front view as seen from the direction of arrow II in FIG.
FIG. 3 is a sectional view showing a reinforcing structure according to a second embodiment of the present invention.
FIG. 4 is a front view as viewed from a direction of an arrow IV in FIG. 3;
FIG. 5 is a cross-sectional view showing a conventional existing beam reinforcing structure.
FIG. 6 is a sectional view showing a modification of the reinforcing structure of FIG.
[Explanation of symbols]
10 existing beam 12 opening 14 steel pipe with brim 16 steel pipe part 18 brim plate 20 adhesive 22 brim plate 24 adhesive

Claims (5)

開口を有するコンクリート部材の補強構造であって、前記開口に鋼管が挿通されていると共に、当該鋼管には、前記コンクリート部材を両側から挟むようにつば板が設けられており、少なくとも一方のつば板はその中央部に設けられた貫通孔に前記鋼管が挿通され、この挿通部において接着剤により前記鋼管に接着されていることを特徴とする補強構造。A reinforcing structure for a concrete member having an opening, wherein a steel pipe is inserted through the opening, and the steel pipe is provided with a brim plate so as to sandwich the concrete member from both sides, and at least one brim plate is provided. The reinforcing structure is characterized in that the steel pipe is inserted into a through hole provided in a central portion of the steel pipe, and the steel pipe is bonded to the steel pipe with an adhesive at the insertion part. 前記接着剤は、金属粉入りの接着剤であることを特徴とする請求項１記載の開口を有するコンクリート部材の補強構造。The reinforcing structure for a concrete member having an opening according to claim 1, wherein the adhesive is an adhesive containing metal powder. 開口を有するコンクリート部材の補強構造であって、前記開口に鋼管が挿通されていると共に、当該鋼管には、前記コンクリート部材を両側から挟むようにつば板が設けられており、少なくとも一方のつば板はその中央部に設けられた開口の内縁にねじ切りされ、このねじ切り部が前記鋼管の外周面に設けられたねじ切り部にねじ込まれることにより前記鋼管に取り付けられていることを特徴とする補強構造。A reinforcing structure for a concrete member having an opening, wherein a steel pipe is inserted through the opening, and the steel pipe is provided with a brim plate so as to sandwich the concrete member from both sides, and at least one brim plate is provided. Is threaded at an inner edge of an opening provided at a central portion thereof, and the threaded portion is attached to the steel pipe by being screwed into a threaded portion provided on an outer peripheral surface of the steel pipe. 開口を有するコンクリート部材の補強方法であって、前記開口に、つば付き鋼管をその先端が前記開口の反対側から突出するように挿通し、その突出部において前記つば付き鋼管の外周につば板を接着剤で接着することを特徴とするコンクリート部材の補強方法。A method for reinforcing a concrete member having an opening, wherein a flanged steel pipe is inserted into the opening so that a tip thereof protrudes from the opposite side of the opening, and a brim plate is provided on an outer periphery of the flanged steel pipe at the protrusion. A method for reinforcing a concrete member, characterized by bonding with an adhesive. 開口を有するコンクリート部材の補強方法であって、前記開口に、つば付き鋼管をその先端が前記開口の反対側から突出するように挿通し、その突出部において前記つば付き鋼管の外周に設けられたねじ切り部に、内縁にねじ切り部が設けられた貫通孔を有するつば板をねじ込むことを特徴とするコンクリート部材の補強方法。A method for reinforcing a concrete member having an opening, wherein a flanged steel pipe is inserted into the opening so that a tip thereof protrudes from the opposite side of the opening, and is provided on an outer periphery of the flanged steel pipe at a protrusion. A method for reinforcing a concrete member, characterized by screwing a flange plate having a through hole provided with a threaded portion on an inner edge into the threaded portion.
JP2003128421A 2003-05-06 2003-05-06 Reinforced structure of concrete member having opening and reinforcing method Pending JP2004332338A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2434615A (en) * 2006-01-25 2007-08-01 Cliff Thomas Device for modification, repair or framing of an aperture in a board
KR100764069B1 (en) 2006-07-19 2007-10-05 주식회사 엘앤에스메탈 Reparing method for damaged hole
JP2009197431A (en) * 2008-02-20 2009-09-03 Maeda Kosen Co Ltd Reinforcing material made of fiber, and reinforcing structure of building skeleton opening using the same
JP5107479B1 (en) * 2012-08-07 2012-12-26 株式会社塩浜工業 Reinforced concrete opening method and reinforced concrete opening structure
CN107100324A (en) * 2017-06-27 2017-08-29 厦门大学嘉庚学院 It is a kind of to strengthen punch reinforced beam bearing capacity and the device of anti-seismic performance
CN116122617A (en) * 2023-01-31 2023-05-16 华南理工大学 Hole reinforcing system and method for web plate hole reinforced concrete beam in reconstruction engineering

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2434615A (en) * 2006-01-25 2007-08-01 Cliff Thomas Device for modification, repair or framing of an aperture in a board
GB2434615B (en) * 2006-01-25 2008-12-24 Cliff Thomas Method And Device For Framing Apertures In Building Boards
KR100764069B1 (en) 2006-07-19 2007-10-05 주식회사 엘앤에스메탈 Reparing method for damaged hole
JP2009197431A (en) * 2008-02-20 2009-09-03 Maeda Kosen Co Ltd Reinforcing material made of fiber, and reinforcing structure of building skeleton opening using the same
JP5107479B1 (en) * 2012-08-07 2012-12-26 株式会社塩浜工業 Reinforced concrete opening method and reinforced concrete opening structure
CN107100324A (en) * 2017-06-27 2017-08-29 厦门大学嘉庚学院 It is a kind of to strengthen punch reinforced beam bearing capacity and the device of anti-seismic performance
CN116122617A (en) * 2023-01-31 2023-05-16 华南理工大学 Hole reinforcing system and method for web plate hole reinforced concrete beam in reconstruction engineering

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