JP4325316B2 - Reinforcing structure and reinforcing method for concrete member - Google Patents

Reinforcing structure and reinforcing method for concrete member Download PDF

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JP4325316B2
JP4325316B2 JP2003303222A JP2003303222A JP4325316B2 JP 4325316 B2 JP4325316 B2 JP 4325316B2 JP 2003303222 A JP2003303222 A JP 2003303222A JP 2003303222 A JP2003303222 A JP 2003303222A JP 4325316 B2 JP4325316 B2 JP 4325316B2
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reinforcing
concrete
fixing
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JP2005068921A (en
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和貴 白井
英雄 勝俣
浩也 萩尾
耕三 木村
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Obayashi Corp
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Description

本発明は、コンクリート部材の補強構造及び補強方法に係り、特に、繊維強化樹脂によってコンクリート部材を補強する補強構造及び補強方法に関する。   The present invention relates to a reinforcing structure and a reinforcing method for a concrete member, and more particularly to a reinforcing structure and a reinforcing method for reinforcing a concrete member with fiber reinforced resin.

従来より、特許文献1に開示されるように、コンクリート梁等の開口部を有するコンクリート構造物の補強構造が知られている。この補強構造では、コンクリート構造物の開口部の周辺に、炭素繊維強化樹脂(CFRP)シートをその強化繊維の向きが互いに直交するように2方向に貼り付けることにより、開口部の周辺を補強して、ひび割れを生じにくくさせる。   Conventionally, as disclosed in Patent Document 1, a reinforcing structure for a concrete structure having an opening such as a concrete beam is known. In this reinforcing structure, the periphery of the opening is reinforced by attaching a carbon fiber reinforced resin (CFRP) sheet in two directions around the opening of the concrete structure so that the directions of the reinforcing fibers are orthogonal to each other. To prevent cracking.

また、非特許文献1には、L型断面のCFRP板を用いたコンクリート梁の補強構造が開示されている。この補強構造では、図6に示すように、断面形状がL型のCFRP板50がU型に組み合わされてコンクリート梁52に貼り付けられる。スラブ54の、コンクリート梁52の両脇の部分には、切り込み56が設けられており、CFRP板50の上端部がこの切り込み56へ差し込まれて接着剤で固定される。
特開平9−125601号公報 Sika社パンフレット"Shear Strengthening Sika CarboDur Composite Systems"
Non-Patent Document 1 discloses a concrete beam reinforcing structure using a CFRP plate having an L-shaped cross section. In this reinforcing structure, as shown in FIG. 6, a CFRP plate 50 having an L-shaped cross section is combined with a U shape and attached to a concrete beam 52. Cuts 56 are provided on both sides of the concrete beam 52 of the slab 54, and the upper end portion of the CFRP plate 50 is inserted into the cuts 56 and fixed with an adhesive.
JP-A-9-125601 Sika brochure "Shear Strengthening Sika CarboDur Composite Systems"

上記特許文献1に開示された補強構造では、CFRPシートをコンクリート構造物に接着するため、コンクリート表面の下地処理、プライマー塗布、含浸用樹脂の塗布、炭素繊維の巻き付け、樹脂の上塗り等の工程が必要となって、時間と手間がかかってしまううえ、CFRPシートにしわや気泡が入らないように施工に熟練が要求される。また、コンクリート梁を補強する場合のように施工場所が上方にあると、塗布した樹脂が垂れ落ちて作業員にかかったり、床を汚したりしてしまうという問題もある。   In the reinforcing structure disclosed in Patent Document 1, the CFRP sheet is bonded to the concrete structure, and therefore, the surface treatment of the concrete surface, primer application, resin application for impregnation, carbon fiber winding, resin top coating, and the like are performed. This requires time and labor, and skill is required for construction so that wrinkles and bubbles do not enter the CFRP sheet. In addition, when the construction site is at the upper position as in the case of reinforcing a concrete beam, there is a problem that the applied resin drips down and falls on an operator or soils the floor.

また、上記非特許文献1に開示された補強構造は、L型のCFRP板の端部をスラブに設けた切り込み56に差し込んで接着剤で固めて定着させる構成であるため、梁の両側にスラブが設けられている場合にしか適用することができない。また、スラブへの切り込みは例えばダイヤモンド製の刃を備えたチェーンソーで行う必要があるため、施工時に大きな騒音や振動が発生し、建物を使用しながらの改修には適用し難い。さらに、スラブが薄い場合にはCFRP板端部の定着長さを十分に確保できないという問題もある。また、梁の両側にスラブがある場合しか適用できないという問題もある。   Further, the reinforcing structure disclosed in Non-Patent Document 1 has a configuration in which an end portion of an L-shaped CFRP plate is inserted into a notch 56 provided in a slab and fixed with an adhesive, so that the slab is fixed to both sides of the beam. It can be applied only when In addition, since it is necessary to cut into the slab with a chainsaw equipped with a diamond blade, for example, large noise and vibration are generated during construction, and it is difficult to apply to renovation while using a building. Further, when the slab is thin, there is a problem that the fixing length of the end portion of the CFRP plate cannot be secured sufficiently. There is also a problem that it can be applied only when there are slabs on both sides of the beam.

本発明は上記の点に鑑みてなされたものであり、繊維補強樹脂を用いて優れた施工性でコンクリート部材を補強することが可能なコンクリート部材の補強構造及び方法を提供することを目的とする。   This invention is made | formed in view of said point, and it aims at providing the reinforcement structure and method of a concrete member which can reinforce a concrete member with the workability which was excellent using fiber reinforced resin. .

上記の目的を達成するため、本発明は、断面形状が略L型の繊維強化樹脂製板からなる補強部材の対をU型に組み合わせて、補強対象であるコンクリート部材の3面に跨るように貼り付け、当該U型に組み合わせた補強部材の端部の表面に定着部材を設け、前記コンクリート部材及び前記定着部材を貫通するように設けた貫通ボルトの、前記定着部材からの突出部分に取り付けたナットで前記定着部材を締め付けることにより、前記補強部材の端部を前記コンクリート部材の表面に定着したことを特徴とする部材の端部を定着部材によって前記コンクリート部材の表面に定着したことを特徴とする。 In order to achieve the above object, the present invention combines a pair of reinforcing members made of fiber reinforced resin plates having a substantially L-shaped cross section into a U shape so as to straddle three surfaces of a concrete member to be reinforced. A fixing member is provided on the surface of the end portion of the reinforcing member combined with the U shape, and a through bolt provided so as to penetrate the concrete member and the fixing member is attached to a protruding portion from the fixing member. The end of the reinforcing member is fixed on the surface of the concrete member by tightening the fixing member with a nut, and the end of the member is fixed on the surface of the concrete member by the fixing member. To do.

本発明によれば、断面形状が略L型の繊維強化樹脂製板からなる補強部材を貼り付けることによりコンクリート部材を補強するので、繊維強化樹脂を塗布するための施工の手間が省ける。また、略L型の補強部材をU型に組み合わせて用いるので、現場にてコンクリート部材の寸法に合わせて補強部材を施工することができる。さらに、補強部材の端部をコンクリート部材の表面に定着するので、例えばコンクリート梁を補強する際に隣接するスラブに補給部材を定着することが不要になる。また、補強部材の端部をコンクリート部材の表面に定着する構成であるため、スラブが薄い場合でも定着長さを十分に確保することができる。なお、本発明において、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材が含まれる。   According to the present invention, since the concrete member is reinforced by sticking the reinforcing member made of a fiber reinforced resin plate having a substantially L-shaped cross section, the labor for applying the fiber reinforced resin can be saved. Further, since the substantially L-shaped reinforcing member is used in combination with the U-shaped, the reinforcing member can be constructed on the site according to the size of the concrete member. Furthermore, since the end portion of the reinforcing member is fixed to the surface of the concrete member, it is not necessary to fix the supply member to the adjacent slab when reinforcing the concrete beam, for example. In addition, since the end of the reinforcing member is fixed to the surface of the concrete member, the fixing length can be sufficiently secured even when the slab is thin. In the present invention, the concrete member includes a reinforced concrete member and a steel reinforced concrete member.

また、本発明は、断面形状が略L型の繊維強化樹脂製板からなる補強部材の対をU型に組み合わせて、補強対象であるコンクリート部材の3面に跨るように貼り付け、当該U型に組み合わせた補強部材の端部の表面に定着部材を設け、前記コンクリート部材の表面に打設したあと施工アンカーを前記定着部材に貫通させ、当該あと施工アンカーの前記定着部材からの突出部分に取り付けたナットで前記定着部材を締め付けることにより、前記補強部材の端部を前記コンクリート部材の表面に定着したことを特徴とするFurther, the present invention combines a pair of reinforcing members made of fiber reinforced resin plates having a substantially L-shaped cross section into a U shape, and pastes the U member so as to straddle three surfaces of a concrete member to be reinforced. A fixing member is provided on the surface of the end portion of the reinforcing member combined with the fixing member. The fixing member is fastened to the surface of the concrete member by tightening the fixing member with a nut .

また、本発明の別の一態様では、前記コンクリート部材の表面にあと施工アンカーを打設し、該あと施工アンカーに取り付けたナットで前記定着部材を締め付けることにより前記補強部材を定着する。   In another aspect of the present invention, a post-construction anchor is placed on the surface of the concrete member, and the fixing member is fixed by tightening the fixing member with a nut attached to the post-construction anchor.

なお、本発明の一態様において、前記コンクリート部材はコンクリート梁であり、前記補強部材は前記コンクリート梁の両側面及び下面を跨ぐように設けられる。   In one aspect of the present invention, the concrete member is a concrete beam, and the reinforcing member is provided so as to straddle both side surfaces and the lower surface of the concrete beam.

本発明によれば、繊維補強樹脂を用いて優れた施工性でコンクリート部材を補強することができる。   According to the present invention, a concrete member can be reinforced with excellent workability using a fiber reinforced resin.

図1は、本発明の第1の実施形態であるコンクリート部材の補強構造を示す断面図であり、図2は図1の矢印IIの向きから見た正面図である。図1及び図2に示すように、本実施形態では、鉄筋コンクリート製あるいは鉄骨鉄筋コンクリート製の梁(以下、コンクリート梁という)10に円形の開口部12が設けられており、この開口部12の周辺を補強部材14により補強するものとしている。   FIG. 1 is a cross-sectional view showing a concrete member reinforcing structure according to a first embodiment of the present invention, and FIG. 2 is a front view seen from the direction of arrow II in FIG. As shown in FIGS. 1 and 2, in this embodiment, a circular opening 12 is provided in a beam 10 (hereinafter referred to as a concrete beam) made of reinforced concrete or steel reinforced concrete. The reinforcing member 14 is used for reinforcement.

補強部材14は、炭素繊維強化樹脂(CFRP)などの繊維強化樹脂からなる断面形状が略L型の板材である。図1に示されるように、補強部材14は対となってU型に組み合わされており、コンクリート梁10を下側から、両側面および下面を跨ぐように、接着材によりコンクリート梁10に接着されている。また、コンクリート梁10の下面部の補強部材14が重なり合う部分では、補強部材14が互いに接着材16で接着されている。図2に示されるように、U型に組み合わされた補強部材14の対はコンクリート梁10の長手方向に複数設けられており、補強部材14の各上端部の表面には、複数の補強部材14に亘って、定着部材としての鋼製の定着プレート18が接着剤16により接着されている。本実施形態では、図2に示されるように、定着プレート18を開口部12の両側の部分に分割している。   The reinforcing member 14 is a plate material having a substantially L-shaped cross section made of a fiber reinforced resin such as carbon fiber reinforced resin (CFRP). As shown in FIG. 1, the reinforcing members 14 are paired and combined in a U shape, and the concrete beam 10 is bonded to the concrete beam 10 with an adhesive so as to straddle both sides and the lower surface from the lower side. ing. In addition, the reinforcing members 14 are bonded to each other with an adhesive 16 in a portion where the reinforcing members 14 on the lower surface portion of the concrete beam 10 overlap. As shown in FIG. 2, a plurality of pairs of reinforcing members 14 combined in a U shape are provided in the longitudinal direction of the concrete beam 10, and a plurality of reinforcing members 14 are provided on the surface of each upper end portion of the reinforcing member 14. In the meantime, a steel fixing plate 18 as a fixing member is bonded by an adhesive 16. In the present embodiment, as shown in FIG. 2, the fixing plate 18 is divided into portions on both sides of the opening 12.

接着剤16としては、エポキシ系接着剤等、適宜な接着剤を用いることができるが、例えば、シーカデュア30(商品名)のように粘性の高い接着剤を用いれば、コンクリート梁10のような上部作業でも接着剤が垂れ落ちることがなく、施工性が向上する。   As the adhesive 16, an appropriate adhesive such as an epoxy-based adhesive can be used. For example, if an adhesive having high viscosity such as Sea Cadure 30 (trade name) is used, the upper part such as the concrete beam 10 is used. Even during work, the adhesive does not sag and the workability is improved.

コンクリート梁10には、その幅方向に貫通する貫通穴22が設けられており、この貫通穴22に貫通ボルト24が挿通されている。貫通ボルト24の両端は、定着プレート18を貫通して、定着プレート18から突出し、この突出部分にナット26が締め付けられている。このようにして、補強部材14の上端部がコンクリート梁10に定着されている。なお、貫通ボルト24を挿通させるための貫通穴22は、例えばコアドリルにより施工することにより、施工時に発生する振動や騒音を小さく抑えることができる。 The concrete beam 10 is provided with a through hole 22 penetrating in the width direction, and a through bolt 24 is inserted into the through hole 22. Both ends of the through-bolt 24 extends through the constant wear plate 18, protrude from the fixing plate 18, a nut 26 is fastened to this protruding portion. In this way, the upper end portion of the reinforcing member 14 is fixed to the concrete beam 10. In addition, the through-hole 22 for allowing the through-bolt 24 to be inserted can be suppressed by, for example, a core drill to reduce vibration and noise generated during the construction.

図3は、本発明の第2の実施形態の補強構造を示すコンクリート梁10の正面図である。上記図2に示す実施形態では、定着プレート18を開口部12の両側に分割しているが、本実施形態では、定着プレート18を分割しないで一体化している。なお、図3では、開口部12が大きいために定着プレート18を開口部12の形状に合わせて切り欠いた例を示している。   FIG. 3 is a front view of the concrete beam 10 showing the reinforcing structure of the second embodiment of the present invention. In the embodiment shown in FIG. 2, the fixing plate 18 is divided on both sides of the opening 12. However, in this embodiment, the fixing plate 18 is integrated without being divided. 3 shows an example in which the fixing plate 18 is cut out in accordance with the shape of the opening 12 because the opening 12 is large.

図4は、本発明の第3の実施形態の補強構造を示すコンクリート梁10の断面図である。この実施形態では、コンクリート梁10に貫通ボルト24を挿通させるのではなく、あと施工アンカー30を施工して、定着プレート18およびナット26により補強部材14を定着している。この実施形態では、コンクリート梁10に貫通穴を設ける必要がないので、例えば、コンクリート梁10が鉄骨鉄筋コンクリート製であって梁中央に鉄骨が存在するために貫通穴を設けることができない場合に好適である。   FIG. 4 is a cross-sectional view of the concrete beam 10 showing the reinforcing structure of the third embodiment of the present invention. In this embodiment, the through bolt 24 is not inserted into the concrete beam 10, but a post-construction anchor 30 is installed, and the reinforcing member 14 is fixed by the fixing plate 18 and the nut 26. In this embodiment, since it is not necessary to provide a through hole in the concrete beam 10, for example, it is suitable when the concrete beam 10 is made of steel reinforced concrete and the through hole cannot be provided because the steel frame exists in the center of the beam. is there.

図5は、本発明の第4の実施形態の補強構造を示すコンクリート梁10の断面図である。本実施形態では、上記図1及び図2に示す実施形態において、貫通ボルト24としてPC鋼棒などの緊張材を使用すると共に、ナット26と定着プレート18との間に例えば皿ばね等の弾性部材32を介装した構成としている。このような構成によれば、ナット26を締め込んで緊張材である貫通ボルト24に張力を導入することにより、長期にわたって定着プレート18による定着力を確保することができ、定着プレート18による補強部材14の定着効果を大幅に向上させることができる。なお、図5の例では、弾性部材32を貫通ボルト24の両端に設けているが、一端側にのみ設けるようにしてもよい。   FIG. 5 is a cross-sectional view of the concrete beam 10 showing the reinforcing structure of the fourth embodiment of the present invention. In the present embodiment, in the embodiment shown in FIGS. 1 and 2, a tension member such as a PC steel bar is used as the through bolt 24, and an elastic member such as a disc spring is provided between the nut 26 and the fixing plate 18. 32 is interposed. According to such a configuration, the fixing force by the fixing plate 18 can be secured over a long period of time by tightening the nut 26 and introducing tension to the through bolt 24 that is a tension material, and the reinforcing member by the fixing plate 18 14 fixing effect can be greatly improved. In the example of FIG. 5, the elastic members 32 are provided at both ends of the through bolt 24, but may be provided only at one end side.

以上説明した本発明の各実施形態の補強構造によれば、次のような効果を得ることができる。   According to the reinforcing structure of each embodiment of the present invention described above, the following effects can be obtained.

(1)CFRPからなる補強部材14がコンクリート梁10の表面に定着されるため、補強部材16に含まれる補強炭素繊維がコンクリート梁10に生じた応力に抵抗することで、高い補強性能が得ることができる。 (1) Since the reinforcing member 14 made of CFRP is fixed on the surface of the concrete beam 10, the reinforcing carbon fiber contained in the reinforcing member 16 resists stress generated in the concrete beam 10, thereby obtaining high reinforcing performance. Can do.

(2)上記各実施形態の補強構造では、コンクリート梁10に貫通穴22を設けて、この貫通穴22に貫通ボルト24を挿通し、定着プレート18およびナット26により補強部材14をコンクリート梁10に定着することができる。ここで、上述した通り、貫通穴22は、コアドリルを用いることにより施工に伴って発生する振動や騒音を小さく抑えることができ、また、定着プレート18及びナット26による定着作業には振動や騒音はほとんど発生しないことはいうまでもない。したがって、コンクリート梁10の補強工事には大きな振動や騒音が生ずる工程が含まれないので、建物の居住環境に悪影響を与えることがなく、したがって、建物を利用しながらの補修改修工事にも適用することが可能である。 (2) In the reinforcing structure of each of the above embodiments, the through hole 22 is provided in the concrete beam 10, the through bolt 24 is inserted into the through hole 22, and the reinforcing member 14 is attached to the concrete beam 10 by the fixing plate 18 and the nut 26. It can be fixed. Here, as described above, the through hole 22 can suppress the vibration and noise generated by the construction by using the core drill, and the fixing work by the fixing plate 18 and the nut 26 is free from vibration and noise. Needless to say, it hardly occurs. Therefore, the reinforcement work of the concrete beam 10 does not include a process that generates large vibrations and noises, so that it does not adversely affect the living environment of the building, and is therefore applicable to repair and repair work while using the building. It is possible.

(3)コンクリート梁10の表面に下地処理を施した後、接着剤を塗布して、L型に成形されたCFRP製の補強部材14を貼り付けるだけでよく、プライマー塗布、含浸用樹脂の塗布、炭素繊維の巻き付け、樹脂の上塗りといった煩雑な工程が不要となるため、工期の短縮を図ることができる。 (3) After applying the surface treatment to the surface of the concrete beam 10, it is only necessary to apply an adhesive and affix the CFRP reinforcing member 14 formed into an L shape, and apply primer and impregnating resin. In addition, since complicated processes such as winding of carbon fiber and overcoating of resin are not necessary, the construction period can be shortened.

(4)定着プレート18の寸法を自由に設定することができるので、必要な定着力に応じて定着プレート18を設計することで、十分な定着力を確保することができる。 (4) Since the dimensions of the fixing plate 18 can be set freely, it is possible to secure a sufficient fixing force by designing the fixing plate 18 according to the necessary fixing force.

(5)補強部材14の端部をコンクリート梁10に直接定着する構成のため、非特許文献1に開示される補強構造のように梁の両側にスラブが存在する場合に限られることがなく、コンクリート梁10の片側あるいは両側にスラブが存在しない場合にも適用が可能である。 (5) Due to the configuration in which the end of the reinforcing member 14 is directly fixed to the concrete beam 10, it is not limited to the case where slabs exist on both sides of the beam as in the reinforcing structure disclosed in Non-Patent Document 1. The present invention can also be applied when there is no slab on one side or both sides of the concrete beam 10.

(6)L型の補強部材14をU型に組み合わせて補強を行うので、現場にてコンクリート梁10の幅に合わせて2枚の補強部材14の間隔を調整し、また、補強部材14の余分な部分を切り取るなどして、種々の形状・寸法のコンクリート梁10に適応することができる。また、現場にて補強部材14を対応種々の形状・寸法のコンクリート梁10に適用することができる。 (6) Since the L-shaped reinforcing member 14 is combined with the U-shaped reinforcement, the distance between the two reinforcing members 14 is adjusted in accordance with the width of the concrete beam 10 at the site, and the extra reinforcing member 14 It is possible to adapt to the concrete beam 10 having various shapes and dimensions by cutting out various parts. Further, the reinforcing member 14 can be applied to the concrete beam 10 having various shapes and dimensions at the site.

(7)図5に示す実施形態のように、ナットと定着部材との間に弾性部材を介装することにより、補強部材14の定着効果を大幅に向上させることができる。 (7) By fixing the elastic member between the nut and the fixing member as in the embodiment shown in FIG. 5, the fixing effect of the reinforcing member 14 can be greatly improved.

なお、上記各実施形態では、本発明が開口部12を備えるコンクリート梁10を対象として、開口部12の周辺部を補強する場合について説明したが、本発明はこれに限らず、開口部の無い梁のせん断補強を行う場合にも適用が可能である。また、梁に限らず、柱やその他の各種コンクリート部材(鉄筋コンクリート部材、鉄骨鉄筋コンクリート部材を含む)の補強にも適用が可能である。柱のように四方からの補強が可能なコンクリート部材の場合には、U型に組み合わせたL型の補強部材を2組、互いに対向するようにコンクリート部材の両側から貼り付ける構成としてもよく、そのような構成も本発明の範囲に含まれる。   In each of the above embodiments, the case where the present invention reinforces the peripheral portion of the opening 12 for the concrete beam 10 including the opening 12 has been described. However, the present invention is not limited thereto, and there is no opening. The present invention can also be applied to the case where shear reinforcement of a beam is performed. Moreover, it is applicable not only to a beam but also to reinforcement of columns and other various concrete members (including reinforced concrete members and steel reinforced concrete members). In the case of a concrete member that can be reinforced from four sides, such as a pillar, two sets of L-shaped reinforcing members combined with a U shape may be attached from both sides of the concrete member so as to face each other. Such a configuration is also included in the scope of the present invention.

また、上記各実施形態では、補強部材14をCFRPにより構成するものとしたが、本発明はこれに限らず、例えば、ガラス繊維補強樹脂(GFRP)など、他の繊維補強樹脂(FRP)で補強部材を構成してもよい。   In each of the above embodiments, the reinforcing member 14 is made of CFRP. However, the present invention is not limited to this, and is reinforced with other fiber reinforced resin (FRP) such as glass fiber reinforced resin (GFRP). You may comprise a member.

また、上記実施形態では、補強対象であるコンクリート梁10がほぼ直角のコーナー部を有しているものとしたが、これに限らず、コーナー部に面取りが施されていて、補強部材14がそのコーナー部に沿って屈曲されている構成であってもよい。コンクリート梁の両コーナーが上記のように面取りされている場合には、そのコーナー部の面を一つの面として数えると、U型に組み合わせた部材は計5面に貼り付けられるが、そのような場合も、U型に組み合わされた補強部材が両側面及び下面の3面に亘って貼り付けられており、本発明の範囲に含まれる。   Moreover, in the said embodiment, although the concrete beam 10 which is a reinforcement object shall have a substantially right-angled corner part, not only this but the corner part is chamfered and the reinforcement member 14 is the The structure bent along the corner part may be sufficient. When both corners of a concrete beam are chamfered as described above, if the surfaces of the corners are counted as one surface, the members combined in the U shape can be attached to a total of five surfaces. Also in this case, the reinforcing member combined with the U shape is attached to the three surfaces of the both side surfaces and the lower surface, and is included in the scope of the present invention.

本発明の第1の実施形態であるコンクリート部材の補強構造を示す断面図である。It is sectional drawing which shows the reinforcement structure of the concrete member which is the 1st Embodiment of this invention. 図1の矢印IIの向きから見た正面図である。It is the front view seen from the direction of arrow II of FIG. 本発明の第2の実施形態の補強構造を示すコンクリート梁の正面図である。It is a front view of the concrete beam which shows the reinforcement structure of the 2nd Embodiment of this invention. 本発明の第3の実施形態の補強構造を示すコンクリート梁の断面図である。It is sectional drawing of the concrete beam which shows the reinforcement structure of the 3rd Embodiment of this invention. 本発明の第4の実施形態の補強構造を示すコンクリート梁の断面図である。It is sectional drawing of the concrete beam which shows the reinforcement structure of the 4th Embodiment of this invention. 従来のコンクリート梁の補強構造を示す断面図である。It is sectional drawing which shows the reinforcement structure of the conventional concrete beam.

符号の説明Explanation of symbols

10 コンクリート梁
12 開口部
14 補強部材
16 定着プレート(定着部材)
22 貫通穴
24 貫通ボルト
26 ナット
30 あと施工アンカー
10 Concrete beam 12 Opening 14 Reinforcement member 16 Fixing plate (fixing member)
22 Through hole 24 Through bolt 26 Nut 30 Post-installed anchor

Claims (6)

断面形状が略L型の繊維強化樹脂製板からなる補強部材の対をU型に組み合わせて、補強対象であるコンクリート部材の3面に跨るように貼り付け、当該U型に組み合わせた補強部材の端部の表面に定着部材を設け、前記コンクリート部材及び前記定着部材を貫通するように設けた貫通ボルトの、前記定着部材からの突出部分に取り付けたナットで前記定着部材を締め付けることにより、前記補強部材の端部を前記コンクリート部材の表面に定着したことを特徴とするコンクリート部材の補強構造。 A pair of reinforcing members made of fiber reinforced resin plates having a substantially L-shaped cross-section is combined with a U shape and pasted over three surfaces of a concrete member to be reinforced, and the reinforcing member combined with the U shape The reinforcing member is provided by fixing a fixing member on a surface of an end portion , and tightening the fixing member with a nut attached to a protruding portion from the fixing member of a through bolt provided to penetrate the concrete member and the fixing member. A reinforcing structure for a concrete member, wherein an end of the member is fixed to the surface of the concrete member. 前記ナットと前記定着部材との間に弾性部材を介装したことを特徴とする請求項1記載のコンクリート部材の補強構造。   2. The concrete member reinforcing structure according to claim 1, wherein an elastic member is interposed between the nut and the fixing member. 断面形状が略L型の繊維強化樹脂製板からなる補強部材の対をU型に組み合わせて、補強対象であるコンクリート部材の3面に跨るように貼り付け、当該U型に組み合わせた補強部材の端部の表面に定着部材を設け、前記コンクリート部材の表面に打設したあと施工アンカーを前記定着部材に貫通させ、当該あと施工アンカーの前記定着部材からの突出部分に取り付けたナットで前記定着部材を締め付けることにより、前記補強部材の端部を前記コンクリート部材の表面に定着したことを特徴とするコンクリート部材の補強構造。 A pair of reinforcing members made of fiber reinforced resin plates having a substantially L-shaped cross-section is combined with a U shape and pasted over three surfaces of a concrete member to be reinforced, and the reinforcing member combined with the U shape A fixing member is provided on the surface of the end, and after being placed on the surface of the concrete member, the fixing anchor is passed through the fixing member, and the fixing member is attached to a protruding portion of the fixing anchor from the fixing member. reinforcing structure of the tightening, the reinforcing member, wherein the to Turkey Nkurito member that the end was fixed to the surface of the concrete member. 前記コンクリート部材はコンクリート梁であり、前記補強部材を前記コンクリート梁の両側面及び下面を跨ぐように設けたことを特徴とする請求項1〜のうち何れか1項記載のコンクリート部材の補強構造。 The concrete member reinforcing structure according to any one of claims 1 to 3 , wherein the concrete member is a concrete beam, and the reinforcing member is provided so as to straddle both side surfaces and a lower surface of the concrete beam. . 略L型の断面形状を有する繊維強化樹脂製板からなる補強部材をU型に組み合わせて、補強対象であるコンクリート部材の3面に跨るように貼り付け、当該U型に組み合わせた補強部材の端部の表面に定着部材を設け、前記コンクリート部材及び前記定着部材を貫通するように設けた貫通ボルトの、前記定着部材からの突出部分に取り付けたナットで前記定着部材を締め付けることにより、前記補強部材の端部を前記コンクリート部材定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 reinforcing member made of a fiber reinforced resin plate having a substantially L-shaped cross-sectional shape is combined with a U shape and pasted across three surfaces of a concrete member to be reinforced, and the end of the reinforcing member combined with the U shape The reinforcing member is provided by fixing a fixing member on a surface of the portion, and tightening the fixing member with a nut attached to a protruding portion from the fixing member of a through bolt provided to penetrate the concrete member and the fixing member. method for reinforcing a concrete member, characterized in that to fix the end to the concrete member. 断面形状が略L型の繊維強化樹脂製板からなる補強部材の対をU型に組み合わせて、補強対象であるコンクリート部材の3面に跨るように貼り付け、当該U型に組み合わせた補強部材の端部の表面に定着部材を設け、前記コンクリート部材の表面に打設したあと施工アンカーを前記定着部材に貫通させ、当該あと施工アンカーの前記定着部材からの突出部分に取り付けたナットで前記定着部材を締め付けることにより、前記補強部材の端部を前記コンクリート部材の表面に定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 pair of reinforcing members made of fiber reinforced resin plates having a substantially L-shaped cross-section is combined with a U shape and pasted over three surfaces of a concrete member to be reinforced, and the reinforcing member combined with the U shape A fixing member is provided on the surface of the end, and after being placed on the surface of the concrete member, the fixing anchor is passed through the fixing member, and the fixing member is attached to a protruding portion of the fixing anchor from the fixing member. A method for reinforcing a concrete member, comprising fixing an end portion of the reinforcing member to a surface of the concrete member by tightening a screw .
JP2003303222A 2003-08-27 2003-08-27 Reinforcing structure and reinforcing method for concrete member Expired - Fee Related JP4325316B2 (en)

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