JP2008143001A

JP2008143001A - Structure reinforcement method and fixing tool

Info

Publication number: JP2008143001A
Application number: JP2006332140A
Authority: JP
Inventors: Takahiro Sugano; 貴浩菅野; Shinji Matsuo; 伸二松尾; Hiroyuki Takahashi; 宏幸高橋; Akira Kobayashi; 朗小林; Masahiro Tateishi; 晶洋立石
Original assignee: Nippon Steel Composite Co Ltd; East Japan Railway Co
Current assignee: Nippon Steel Chemical and Materials Co Ltd; East Japan Railway Co
Priority date: 2006-12-08
Filing date: 2006-12-08
Publication date: 2008-06-26
Anticipated expiration: 2026-12-08
Also published as: JP4870537B2

Abstract

【課題】作業性が良く、また、強化繊維シート補強材の断面を欠損することがないか、或いは、最小限として、コンクリート構造物或いは鋼構造物のような構造物の補強を施工することのできる補強方法及び定着具を提供する。
【解決手段】定着具２０は、固定具２５により構造物１００に固定することのできる軸線方向に延在した棒状の定着体２１と、所定の幅と長さを備えたシート状とされる強化繊維シートにて作製され、一端部領域が定着体２１の周面に巻き付けられて定着体２１の周面に樹脂にて接着固定され、残りの領域は定着体２１に接着固定されることなく定着体２１から延在している定着用強化繊維シート補強材３０と、を有する。
【選択図】図２An object of the present invention is to improve workability and to reinforce a structure such as a concrete structure or a steel structure as long as the cross section of a reinforcing fiber sheet reinforcing material is not lost or is minimized. Provided is a reinforcing method and a fixing device.
A fixing device includes a rod-shaped fixing body that extends in an axial direction and can be fixed to a structure by a fixing device, and a reinforcing member that has a sheet shape having a predetermined width and length. It is made of a fiber sheet, one end region is wound around the peripheral surface of the fixing body 21 and bonded and fixed to the peripheral surface of the fixing body 21 with resin, and the remaining area is fixed without being fixed to the fixing body 21. A fixing reinforcing fiber sheet reinforcing material 30 extending from the body 21.
[Selection] Figure 2

Description

本発明は、強化繊維シート補強材を使用して土木建築構造物等であるコンクリート構造物、或いは、鋼構造物（本願明細書では、コンクリート構造物及び鋼構造物を含めて単に「構造物」という。）の曲げに対する補強を行う際に使用する定着具、及び、斯かる定着具を使用した補強方法に関するものである。 The present invention is a concrete structure such as a civil engineering structure using a reinforcing fiber sheet reinforcing material, or a steel structure (in the present specification, including a concrete structure and a steel structure, simply “structure”). This relates to a fixing device used for reinforcing the bending of the fixing device and a reinforcing method using the fixing device.

構造物の補強方法として、近年、既存或いは新設の構造物の表面に強化繊維シート補強材として１枚或いは複数枚の連続強化繊維シートを貼り付ける接着工法が開発されている。 As a method for reinforcing a structure, in recent years, a bonding method has been developed in which one or a plurality of continuous reinforcing fiber sheets are bonded to the surface of an existing or new structure as a reinforcing fiber sheet reinforcing material.

例えば、コンクリート構造物に強化繊維シート補強材を接着させ補強する場合には、設計上補強が必要な範囲から強化繊維シート補強材の定着長を考慮して貼り付ける必要がある。 For example, when reinforcing a reinforcing fiber sheet reinforcing material by adhering it to a concrete structure, it is necessary to apply the reinforcing fiber sheet reinforcing material in consideration of the fixing length of the reinforcing fiber sheet reinforcing material from the range where the reinforcing is necessary in terms of design.

しかしながら、定着長を確保できない場合は、強化繊維シート補強材の端部を鋼材で圧着し、鋼材をアンカーでコンクリート構造物に定着することが行われている。図１３に、現在行われているコンクリート梁１００を強化繊維シート補強材１０にて曲げ補強する場合の、強化繊維シート補強材１０の定着方法の一例を示す。 However, when the fixing length cannot be secured, the end of the reinforcing fiber sheet reinforcing material is pressure-bonded with a steel material, and the steel material is fixed to a concrete structure with an anchor. FIG. 13 shows an example of a fixing method for the reinforcing fiber sheet reinforcing material 10 when the concrete beam 100 currently being used is bent and reinforced with the reinforcing fiber sheet reinforcing material 10.

図１３の構成では、コンクリート梁１００の長手方向に沿って、梁１００の下面１０１に強化繊維シート補強材１０が貼り付けられている。強化繊維シート補強材１０は、その幅方向端部に、梁１００の長手方向に沿って延在する平らな鋼板１１０を配置し、アンカー１１１のような固定具にてコンクリート梁１００に定着している。このように一箇所で定着するのでアンカー１１１のためのアンカー孔１１２が多数必要となる。 In the configuration of FIG. 13, the reinforcing fiber sheet reinforcing material 10 is attached to the lower surface 101 of the beam 100 along the longitudinal direction of the concrete beam 100. The reinforcing fiber sheet reinforcing material 10 has a flat steel plate 110 extending along the longitudinal direction of the beam 100 at the end in the width direction, and is fixed to the concrete beam 100 with a fixture such as an anchor 111. Yes. Since fixing is performed at one place in this way, a large number of anchor holes 112 for the anchor 111 are required.

また、特許文献１に記載するように、図１４に示す構成では、コンクリート梁１００の長手方向に沿って、梁１００の下面１０１及び両側面１０２に強化繊維シート補強材１０が貼り付けられている。また、強化繊維シート補強材１０の幅方向端部は、梁１００の長手方向に沿って設けられた円柱形の定着体１１３に巻き付けられ、この定着体１１３をアンカー１１１にてコンクリート梁１００の天井部１０３に定着している。 Further, as described in Patent Document 1, in the configuration shown in FIG. 14, the reinforcing fiber sheet reinforcing material 10 is attached to the lower surface 101 and both side surfaces 102 of the beam 100 along the longitudinal direction of the concrete beam 100. . Further, the end portion in the width direction of the reinforcing fiber sheet reinforcing material 10 is wound around a columnar fixing body 113 provided along the longitudinal direction of the beam 100, and the fixing body 113 is anchored by the anchor 111 to the ceiling of the concrete beam 100. It is fixed on the portion 103.

しかしながら、本例は、コンクリート梁１００の剪断補強をなす場合の補強方法であって、強化繊維シート補強材１０における強化繊維２は、梁１００の下面１０１及び両側面１０２に延在したＵ字状にされて、梁１００の長手方向に沿って配列して設けられている。従って、強化繊維シート補強材１０の端部は、定着体１１３を用いて、アンカー１１１にてコンクリート梁１００の天井部１０３に固着することが必須である。 However, this example is a reinforcing method in the case of performing shear reinforcement of the concrete beam 100, and the reinforcing fibers 2 in the reinforcing fiber sheet reinforcing material 10 are U-shaped extending to the lower surface 101 and both side surfaces 102 of the beam 100. And arranged in the longitudinal direction of the beam 100. Therefore, it is essential that the end portion of the reinforcing fiber sheet reinforcing material 10 is fixed to the ceiling portion 103 of the concrete beam 100 with the anchor 111 using the fixing body 113.

もし、強化繊維シート補強材１０の積層数、即ち、強化繊維シートの枚数が増えた場合には、円柱形定着体１１３を大きくし、且つ、定着体１１３を固着するためのアンカー孔１１２を大きく且つ深くし、アンカー１１１による定着体１１３の固着力を増大させることが必要となる。このように、アンカー孔１１２を大きく、且つ、深くすることは、コンクリート構造物の破壊を招くといった虞が生じてくる。 If the number of reinforcing fiber sheet reinforcing members 10 stacked, that is, the number of reinforcing fiber sheets increases, the cylindrical fixing body 113 is enlarged and the anchor hole 112 for fixing the fixing body 113 is enlarged. It is necessary to increase the fixing force of the fixing body 113 by the anchor 111 by increasing the depth. Thus, making the anchor hole 112 larger and deeper may cause destruction of the concrete structure.

本発明者らの研究実験の結果によれば、強化繊維シート補強材による接着工法において、特に、同じ寸法の複数枚の強化繊維シート補強材をコンクリート構造物表面に積層して接着した場合において、上記定着方法を採用した場合には、次のような問題が発生することが分かった。
（１）強化繊維シート補強材を複数枚積層して接着した場合、同一位置で各層を接着することとなるが、設計上必要な定着長を確保できない場合は、強化繊維シート補強材にかかる引張力を固定具、例えば、アンカーの剪断耐力或いは鋼板の圧着による付着力との和で負担することになる。そのために、アンカーが多数必要となる。また、鋼板の面積が大きくなる。
（２）アンカーが同一定着位置で多数になる場合は、既設コンクリートの鉄筋の配置状況により、アンカー孔の削孔が容易に行えない可能性がある。
（３）高架橋などのコンクリート構造物では、仮設の足場での作業が主であるため、定着体としての鋼板の面積が大きくなった場合は、鋼板が非常に重く施工上困難となる場合が生じる。
（４）強化繊維シート補強材の使用枚数が増え、定着体を大きくする必要が生じた場合には、定着体固着のためのアンカー孔を深くし、又、大きくして、その固着力を増大させることが必要となり、そのために、コンクリート構造物を破壊する虞が生じてくる。 According to the results of our research experiments, in the bonding method using reinforcing fiber sheet reinforcing materials, particularly when a plurality of reinforcing fiber sheet reinforcing materials having the same dimensions are laminated and bonded to the concrete structure surface, It has been found that the following problems occur when the above fixing method is employed.
(1) When a plurality of reinforcing fiber sheet reinforcing materials are laminated and bonded, each layer is bonded at the same position, but if the fixing length necessary for the design cannot be secured, the tension applied to the reinforcing fiber sheet reinforcing material The force is borne by the sum of the shear strength of the fixture, for example, the anchor, or the adhesion force of the steel plate. Therefore, many anchors are required. Moreover, the area of a steel plate becomes large.
(2) When there are a large number of anchors at the same fixing position, there is a possibility that the drilling of the anchor hole cannot be easily performed depending on the arrangement state of the reinforcing bars of the existing concrete.
(3) In concrete structures such as viaducts, work on temporary scaffolds is the main, so when the area of a steel plate as a fixing body increases, the steel plate may be very heavy and difficult to construct. .
(4) When the number of reinforcing fiber sheet reinforcing materials used increases and the size of the fixing member needs to be increased, the anchor hole for fixing the fixing member is deepened and increased to increase its fixing force. Therefore, there is a risk of destroying the concrete structure.

そこで、本発明者らは、図１５に示すように、構造物１００の貼着面１０１に強化繊維シート１を複数枚積層して接着剤で貼付することにより構造物を補強する補強方法において、構造物１００の貼着面１０１に貼付した複数枚の強化繊維シート１の端部を、コンクリート構造物１００の貼着面側とは反対側の強化繊維シート１から貼着面側の強化繊維シート１へと所定枚数にて複数に分層し、分層された強化繊維シート１の所定枚数分の端部をそれぞれ、強化繊維シート１の長手方向に沿って異なる位置にて強化繊維シートの長手方向に直交して配置された複数の棒状定着体１２１に巻き付け、接着剤で接着し、定着体１２１を構造物１００に固定具１２２にて固着する、補強方法を開発した（特許文献２）。
特開平１０−２９８９３０号公報特願２００５−３５９５７９号 Therefore, the present inventors, as shown in FIG. 15, in a reinforcing method for reinforcing a structure by laminating a plurality of reinforcing fiber sheets 1 on the bonding surface 101 of the structure 100 and sticking with an adhesive, From the reinforcing fiber sheet 1 on the side opposite to the sticking surface side of the concrete structure 100, the ends of the plurality of reinforcing fiber sheets 1 stuck on the sticking surface 101 of the structure 100 are reinforced fiber sheets on the sticking surface side. 1 is divided into a plurality of layers by a predetermined number of sheets, and the end portions of the divided reinforcing fiber sheets 1 corresponding to the predetermined number of sheets are arranged at different positions along the longitudinal direction of the reinforcing fiber sheets 1. A reinforcing method has been developed in which a plurality of rod-like fixing bodies 121 arranged orthogonal to the direction are wound around and bonded with an adhesive, and the fixing body 121 is fixed to the structure 100 with a fixing tool 122 (Patent Document 2).
Japanese Patent Laid-Open No. 10-298930 Japanese Patent Application No. 2005-359579

上記特許文献２に記載する補強方法は、強化繊維シート補強材の断面を欠損することなく、コンクリート構造物或いは鋼構造物のような構造物の補強が可能である、といった利点を有している。しかし、次ような問題がある。 The reinforcing method described in Patent Document 2 has an advantage that a structure such as a concrete structure or a steel structure can be reinforced without losing the cross section of the reinforcing fiber sheet reinforcing material. . However, there are the following problems.

つまり、特許文献２に記載の補強方法によると、接着樹脂が含浸された強化繊維シートを定着体に巻き取って施工する必要がある。しかし、樹脂含浸された強化繊維シートは、滑るため作業性が悪い。 In other words, according to the reinforcing method described in Patent Document 2, it is necessary to wind and apply the reinforcing fiber sheet impregnated with the adhesive resin around the fixing body. However, the reinforced fiber sheet impregnated with resin is slippery and has poor workability.

そこで、本発明の目的は、作業性が良く、また、強化繊維シート補強材の断面を欠損することがないか、或いは、最小限として、コンクリート構造物或いは鋼構造物のような構造物の補強を施工することのできる補強方法及び定着具を提供することである。 Accordingly, an object of the present invention is to improve workability and to reinforce a structure such as a concrete structure or a steel structure, as long as the cross section of the reinforcing fiber sheet reinforcing material is not lost or, as a minimum, It is providing the reinforcement method and fixing tool which can construct.

上記目的は本発明に係るコンクリート構造物或いは鋼構造物のような構造物の補強方法及び定着具にて達成される。要約すれば、第１の本発明によれば、
固定具により構造物に固定することのできる軸線方向に延在した棒状の定着体と、
所定の幅と長さを備えたシート状とされる強化繊維シートにて作製され、一端部領域が前記定着体の周面に巻き付けられて前記定着体の周面に樹脂にて接着固定され、残りの領域は前記定着体の周面に接着固定されることなく前記定着体から延在している定着用強化繊維シート補強材と、
を有することを特徴とする定着具が提供される。 The above object is achieved by a method for reinforcing a structure such as a concrete structure or steel structure and a fixing tool according to the present invention. In summary, according to the first invention,
A rod-like fixing body extending in the axial direction that can be fixed to the structure by a fixing tool;
It is made of a reinforcing fiber sheet that is in the form of a sheet having a predetermined width and length, one end region is wound around the peripheral surface of the fixing body, and is adhesively fixed to the peripheral surface of the fixing body with a resin, The remaining region is a fixing reinforcing fiber sheet reinforcing material extending from the fixing body without being adhesively fixed to the peripheral surface of the fixing body, and
There is provided a fixing device characterized by comprising:

第１の本発明の一実施態様によれば、前記定着体は、軸線方向の長さが前記定着用強化繊維シート補強材の幅と同じか、或いは幾分大きくされ、横断面形状が、円形、楕円形、長円形、或いは、隅角部が円弧状とされた多角形とされる柱状体又は円筒体である。 According to an embodiment of the first aspect of the present invention, the fixing body has an axial length equal to or somewhat larger than the width of the fixing reinforcing fiber sheet reinforcing material, and has a circular cross-sectional shape. A columnar body or a cylindrical body having an elliptical shape, an oval shape, or a polygonal shape in which corners are arcuate.

第１の本発明の他の実施態様によれば、前記定着用強化繊維シート補強材において、前記定着体の周面に接着固定されることなく前記定着体から延在している領域は、樹脂が含浸されていないか、又は、樹脂が含浸された半硬化状態のプリプレグシートであるか、又は、樹脂が含浸され硬化されている。 According to another embodiment of the first aspect of the present invention, in the reinforcing reinforcing fiber sheet reinforcing material, the region extending from the fixing body without being bonded and fixed to the peripheral surface of the fixing body is a resin. Is not impregnated, or is a semi-cured prepreg sheet impregnated with resin, or impregnated with resin and cured.

第２の本発明によれば、
構造物の貼着面に細長形状の強化繊維シート補強材を樹脂で接着することにより構造物を補強する補強方法において、
（ａ）構造物の貼着面の両端領域に位置して、上記構成の定着具である第１の定着具を配置し、少なくとも、前記第１の定着具から延在した第１の定着用強化繊維シート補強材を前記貼着面に樹脂にて接着し、且つ、前記第１の定着具の定着体を固定具にて構造物に固定し、
（ｂ）前記両第１の定着具の間の前記構造物の貼着面に第１の補強用強化繊維シート補強材を樹脂にて接着し、前記第１の補強用強化繊維シート補強材の両端継手領域が、前記両第１の定着具の前記第１の定着用強化繊維シート補強材と接合するようにした、
ことを特徴とする構造物の補強方法が提供される。 According to the second invention,
In a reinforcement method for reinforcing a structure by adhering an elongated reinforcing fiber sheet reinforcing material with a resin to a bonding surface of the structure,
(A) A first fixing device that is a fixing device having the above-described structure is disposed at both end regions of the attachment surface of the structure, and at least a first fixing device extending from the first fixing device. A reinforcing fiber sheet reinforcing material is bonded to the sticking surface with a resin, and the fixing body of the first fixing tool is fixed to a structure with a fixing tool;
(B) A first reinforcing reinforcing fiber sheet reinforcing material is bonded to a bonding surface of the structure between the first fixing tools with a resin, and the first reinforcing reinforcing fiber sheet reinforcing material Both end joint regions are joined to the first fixing reinforcing fiber sheet reinforcing material of the first fixing tools.
A method for reinforcing a structure is provided.

第２の本発明の一実施態様によれば、
（ｃ）更に、前記両第１の定着具の間の領域において、前記（ｂ）工程にて接着された前記第１の補強用強化繊維シート補強材に重なるようにして請求項１〜６のいずれかの項に記載の定着具である第２の定着具を配置し、少なくとも、前記第２の定着具から延在した第２の定着用強化繊維シート補強材を前記第１の補強用強化繊維シート補強材に積層して樹脂にて接着し、且つ、前記第２の定着具の定着体を固定具にて構造物に固定し、
（ｄ）前記両第２の定着具の間の領域において、前記第１の補強用強化繊維シート補強材に積層して、第２の補強用強化繊維シート補強材を樹脂にて接着し、前記第２の補強用強化繊維シート補強材の両端継手領域が、前記両第２の定着具の前記第２の定着用強化繊維シート補強材と接合するようにし、
（ｅ）必要に応じて、前記（ｃ）、（ｄ）工程を繰り返す。 According to one embodiment of the second invention,
(C) Further, in the region between the first fixing tools, the first reinforcing reinforcing fiber sheet reinforcing material bonded in the step (b) is overlapped with the first fixing tool. The second fixing tool, which is the fixing tool according to any one of the items, is disposed, and at least the second reinforcing reinforcing fiber sheet reinforcing material extending from the second fixing tool is used as the first reinforcing reinforcing material. Laminated on the fiber sheet reinforcing material and bonded with resin, and the fixing body of the second fixing tool is fixed to the structure with a fixing tool,
(D) In the region between the second fixing devices, the second reinforcing reinforcing fiber sheet reinforcing material is laminated on the first reinforcing reinforcing fiber sheet reinforcing material, and the second reinforcing reinforcing fiber sheet reinforcing material is bonded with a resin, Both end joint regions of the second reinforcing reinforcing fiber sheet reinforcing material are joined to the second fixing reinforcing fiber sheet reinforcing material of the second fixing tools;
(E) The steps (c) and (d) are repeated as necessary.

第３の本発明によれば、
構造物の貼着面に細長形状の強化繊維シート補強材を樹脂で接着することにより構造物を補強する補強方法において、
（ａ）構造物の貼着面に第１の補強用強化繊維シート補強材を樹脂にて接着し、
（ｂ）前記第１の補強用強化繊維シート補強材の両端領域に位置して、請求項１〜６のいずれかの項に記載の定着具である第１の定着具を配置し、少なくとも前記第１の定着具から延在した第１の定着用強化繊維シート補強材を前記第１の補強用強化繊維シート補強材の両端継手領域に積層して樹脂にて接着し、且つ、前記第１の定着具の定着体を固定具にて構造物に固定する、
ことを特徴とする構造物の補強方法が提供される。 According to the third invention,
In a reinforcement method for reinforcing a structure by adhering an elongated reinforcing fiber sheet reinforcing material with a resin to a bonding surface of the structure,
(A) Adhering the first reinforcing reinforcing fiber sheet reinforcing material to the attachment surface of the structure with a resin;
(B) The first fixing tool that is the fixing tool according to any one of claims 1 to 6 is disposed at both end regions of the first reinforcing reinforcing fiber sheet reinforcing material, and at least the The first fixing reinforcing fiber sheet reinforcing material extending from the first fixing tool is laminated on both end joint regions of the first reinforcing reinforcing fiber sheet reinforcing material and bonded with resin, and the first Fix the fixing body of the fixing tool to the structure with the fixing tool.
A method for reinforcing a structure is provided.

第３の本発明の一実施態様によれば、
（ｃ）更に、前記両第１の定着具の間の領域において、前記第１の補強用強化繊維シート補強材に積層して、第２の補強用強化繊維シート補強材を樹脂にて接着し、
（ｄ）前記両第１の定着具の間の領域において、前記（ａ）工程にて接着された前記第１の補強用強化繊維シート補強材に重なるようにして請求項１〜６のいずれかの項に記載の定着具である第２の定着具を配置し、前記第２の定着具から延在した第２の定着用強化繊維シート補強材を前記第２の補強用強化繊維シート補強材の両端継手領域に積層して樹脂にて接着し、且つ、前記第２の定着具の定着体を固定具にて構造物に固定し、
（ｅ）必要に応じて、前記（ｃ）、（ｄ）工程を繰り返す。 According to one embodiment of the third invention,
(C) Further, in the region between the first fixing devices, the second reinforcing reinforcing fiber sheet reinforcing material is laminated with the first reinforcing reinforcing fiber sheet reinforcing material, and the second reinforcing reinforcing fiber sheet reinforcing material is bonded with a resin. ,
(D) In the region between the first fixing members, the reinforcing fiber sheet reinforcing material for reinforcement that is bonded in the step (a) is overlapped with any one of claims 1 to 6. The second fixing tool, which is the fixing tool described in the above section, is disposed, and the second reinforcing reinforcing fiber sheet reinforcing material extended from the second fixing tool is used as the second reinforcing reinforcing fiber sheet reinforcing material. Are bonded to both end joint regions and bonded with resin, and the fixing body of the second fixing tool is fixed to the structure with a fixing tool,
(E) The steps (c) and (d) are repeated as necessary.

第２及び第３の本発明にて、他の一実施態様によれば、前記補強用強化繊維シート補強材は、前記構造物に貼着する前においては、樹脂未含浸シートであるか、又は、樹脂が含浸された半硬化状態のプリプレグシートである。 In the second and third aspects of the present invention, according to another embodiment, the reinforcing reinforcing fiber sheet reinforcing material is a resin non-impregnated sheet before being attached to the structure, or A semi-cured prepreg sheet impregnated with resin.

第２及び第３の本発明において、他の実施態様によれば、前記構造物は、コンクリート構造物或いは鋼構造物である。 In the second and third aspects of the present invention, according to another embodiment, the structure is a concrete structure or a steel structure.

第１、第２及び第３の本発明にて、一実施態様によれば、前記定着用及び補強用強化繊維シート補強材は、強化繊維を一方向に配列した少なくとも１枚の一方向配列強化繊維シートか、又は、強化繊維で形成したシート状織物である少なくとも１枚の強化繊維シートにて構成される。 According to the first, second and third aspects of the present invention, according to one embodiment, the fixing and reinforcing reinforcing fiber sheet reinforcing material is at least one unidirectionally arranged reinforcing reinforcing fiber arranged in one direction. It is composed of at least one reinforcing fiber sheet which is a fiber sheet or a sheet-like woven fabric formed of reinforcing fibers.

第１、第２及び第３の本発明にて、他の実施態様によれば、前記強化繊維は、ＰＡＮ系或いはピッチ系炭素繊維；ボロン繊維、チタン繊維、スチール繊維などの金属繊維；アラミド、ＰＢＯ（ポリパラフェニレンベンズビスオキサゾール）、ポリアミド、ポリアリレート、ポリエステルなどの有機繊維；が単独で、又は、複数種混入してハイブリッドにて使用される。 In the first, second and third aspects of the present invention, according to another embodiment, the reinforcing fiber is a PAN-based or pitch-based carbon fiber; a metal fiber such as a boron fiber, a titanium fiber, or a steel fiber; Organic fibers such as PBO (polyparaphenylene benzbisoxazole), polyamide, polyarylate, and polyester are used alone or in a mixture of plural kinds.

第１、第２及び第３の本発明にて、他の実施態様によれば、前記樹脂は、常温硬化型或は熱硬化型のエポキシ樹脂、ビニールエステル樹脂、ＭＭＡ樹脂、不飽和ポリエステル樹脂、又はフェノール樹脂である。 In the first, second and third present inventions, according to another embodiment, the resin is a room temperature curable or thermosetting epoxy resin, a vinyl ester resin, an MMA resin, an unsaturated polyester resin, Or it is a phenol resin.

本発明によれば、作業性が良く、また、強化繊維シート補強材の断面を欠損することがないか、或いは、最小限として、コンクリート構造物或いは鋼構造物のような構造物の補強を施工することができる。 According to the present invention, workability is good, and the cross section of the reinforcing fiber sheet reinforcing material is not lost or, as a minimum, a structure such as a concrete structure or a steel structure is reinforced. can do.

以下、本発明に係るコンクリート構造物或いは鋼構造物のような構造物の補強方法及び定着具を図面に則して更に詳しく説明する。 Hereinafter, a method for reinforcing a structure such as a concrete structure or a steel structure and a fixing tool according to the present invention will be described in more detail with reference to the drawings.

実施例１
本発明の構造物の補強方法は、梁又は桁部材、更には、壁、柱部材、床版などのスラブ部材など、建築或いは土木構造物などであるコンクリート構造物或いは鋼構造物の補強、特に曲げ補強に際して広く適用し得るが、本実施例では、コンクリート梁の曲げ補強に適用した場合について説明する。 Example 1
The method for reinforcing a structure according to the present invention includes a beam or girder member, a wall, a column member, a slab member such as a floor slab, or the like, such as a concrete structure or a steel structure. Although it can apply widely at the time of bending reinforcement, a present Example demonstrates the case where it applies to the bending reinforcement of a concrete beam.

本発明は、構造物の貼着面に細長形状の強化繊維シート補強材を樹脂で接着することにより構造物を補強する補強方法に関するものであるが、図１に示すように、本発明の補強方法によれば、補強用の強化繊維シート補強材１０の長手方向両端部は、各々、この補強用強化繊維シート補強材１０とは別体として準備された定着具２０、２０を用いて構造物貼着面１０１に定着される。 The present invention relates to a reinforcing method for reinforcing a structure by adhering an elongated reinforcing fiber sheet reinforcing material to a bonding surface of the structure with a resin. As shown in FIG. According to the method, both ends in the longitudinal direction of the reinforcing fiber sheet reinforcing material 10 for reinforcement are structures using fixing tools 20 and 20 prepared separately from the reinforcing fiber sheet reinforcing material 10 for reinforcement. It is fixed on the sticking surface 101.

先ず、本発明にて使用する補強用強化繊維シート補強材１０を構成する強化繊維シートについて説明する。 First, the reinforcing fiber sheet constituting the reinforcing reinforcing fiber sheet reinforcing material 10 used in the present invention will be described.

（強化繊維シート）
図１１に、強化繊維シート１の一実施例を示す。 (Reinforced fiber sheet)
FIG. 11 shows an example of the reinforcing fiber sheet 1.

強化繊維シート１は、連続した強化繊維２を一様に引き揃え、一方向に配列した、所定の単位重量を有するものである。強化繊維シート１は、本実施例では、繊維長さ方向に沿った長さ（Ｌ０）が、繊維長さ方向に対して直交する幅（Ｗ０）より大きくされた、所謂、細長形状とされる。強化繊維シート１の長さ（Ｌ０）及び幅（Ｗ０）は、補強される構造物の寸法、形状に応じて適宜決定される。 The reinforcing fiber sheet 1 has a predetermined unit weight in which continuous reinforcing fibers 2 are uniformly aligned and arranged in one direction. In this embodiment, the reinforcing fiber sheet 1 has a so-called elongated shape in which the length (L0) along the fiber length direction is larger than the width (W0) perpendicular to the fiber length direction. . The length (L0) and width (W0) of the reinforcing fiber sheet 1 are appropriately determined according to the size and shape of the structure to be reinforced.

強化繊維２としては、ＰＡＮ系或いはピッチ系炭素繊維；ボロン繊維、チタン繊維、スチール繊維などの金属繊維；更には、アラミド、ＰＢＯ（ポリパラフェニレンベンズビスオキサゾール）、ポリアミド、ポリアリレート、ポリエステルなどの有機繊維；が単独で、又は、複数種混入してハイブリッドにて使用することができる。 Reinforcing fibers 2 include PAN-based or pitch-based carbon fibers; metal fibers such as boron fibers, titanium fibers, and steel fibers; and further, aramid, PBO (polyparaphenylene benzbisoxazole), polyamide, polyarylate, polyester, etc. Organic fibers can be used alone or in a hybrid mixed with a plurality of types.

又、強化繊維シート１は、取り扱いを容易とするために、図１１に示すように、強化繊維２を一方向に配列した強化繊維層４の片面、或いは、両面を、例えば直径２〜５０μｍのガラス繊維或いは有機繊維にて作製したメッシュ状の支持体シート３により支持した構成とすることもできる。 In order to facilitate the handling of the reinforcing fiber sheet 1, as shown in FIG. 11, one side or both sides of the reinforcing fiber layer 4 in which the reinforcing fibers 2 are arranged in one direction, for example, a diameter of 2 to 50 μm. It can also be set as the structure supported by the mesh-shaped support body sheet | seat 3 produced with the glass fiber or the organic fiber.

メッシュ状支持体シート３にて強化繊維層４を保持する方法としては、例えば、メッシュ状支持体シート３を構成する縦糸６及び横糸７の表面に低融点タイプの熱可塑性樹脂を予め含浸させておき、メッシュ状支持体シート３を強化繊維層４の両面に積層して加熱加圧し、メッシュ状支持体シート３の縦糸６及び横糸７の部分を強化繊維層４に溶着する。 As a method for holding the reinforcing fiber layer 4 on the mesh-like support sheet 3, for example, the surface of the warp yarn 6 and the weft yarn 7 constituting the mesh-like support sheet 3 is impregnated with a low melting point type thermoplastic resin in advance. Then, the mesh-like support sheet 3 is laminated on both surfaces of the reinforcing fiber layer 4 and heated and pressurized, and the warp yarn 6 and weft yarn 7 portions of the mesh-like support sheet 3 are welded to the reinforcing fiber layer 4.

別法として、図１２に示すように、強化繊維シート１は、一方向に配列された強化繊維２に対して直交して、繊維２のバラケ止めとして繊維５を横糸として一定の間隔にて打ち込み、所謂、織物（クロス）のような構造のシートとすることも可能である。繊維５としては、上述と同様に、例えば直径２〜５０μｍのガラス繊維或は有機繊維が使用可能であるが、ガラス繊維を芯部に有し、低融点の熱融着性ポリエステルをその周囲に配したような二重構造の複合繊維は、繊維束のバラケ防止効果が大きく、好ましく用いられる。この方法での、横糸の打ち込み間隔（ｐ）に特に制限はないが、作製されたシートの取り扱い性を考慮して、通常２５〜１００ｍｍ間隔の範囲で選定される。 Alternatively, as shown in FIG. 12, the reinforcing fiber sheet 1 is driven perpendicularly with respect to the reinforcing fibers 2 arranged in one direction, and the fibers 5 are driven at regular intervals as wefts to stop the fibers 2 from being separated. It is also possible to make a sheet having a structure like a so-called woven fabric (cloth). As the fiber 5, glass fiber or organic fiber having a diameter of 2 to 50 μm, for example, can be used in the same manner as described above. The double-structured composite fiber as arranged has a great effect of preventing the fiber bundle from being loosened and is preferably used. Although there is no particular limitation on the weft driving distance (p) in this method, it is usually selected in the range of 25 to 100 mm in consideration of the handleability of the produced sheet.

更に、図示してはいないが、強化繊維シート１は、強化繊維２を使用して織成された、繊維の主軸が２軸、３軸、４軸とされるシート状の織物とすることができる。例えば、織物としては、強化繊維２を二方向に配向させた平織物、綾織物、朱子織物や、強化繊維２を三方向、四方向に配向させた３軸、４軸織物などを使用することができる。 Furthermore, although not shown, the reinforcing fiber sheet 1 may be a sheet-like woven fabric woven using the reinforcing fibers 2 and having two, three, and four main axes of fibers. it can. For example, as the woven fabric, a plain woven fabric, a twill woven fabric, a satin woven fabric in which the reinforcing fibers 2 are oriented in two directions, a triaxial, a four-axial woven fabric in which the reinforcing fibers 2 are oriented in three or four directions, and the like are used. Can do.

また、強化繊維シート補強材１０は、１枚の強化繊維シート１で構成することもでき、又は、同じ構成の、或いは、異なる構成の複数枚の強化繊維シート１を積層して構成しても良い。 Further, the reinforcing fiber sheet reinforcing material 10 can be constituted by a single reinforcing fiber sheet 1 or can be constituted by laminating a plurality of reinforcing fiber sheets 1 having the same configuration or different configurations. good.

本発明の補強方法を実施する際に強化繊維シート補強材１０に含浸されるマトリクス樹脂（即ち、接着剤）は、熱硬化性樹脂とすることができ、熱硬化性樹脂としては、常温硬化型或は熱硬化型のエポキシ樹脂、ビニールエステル樹脂、ＭＭＡ樹脂、不飽和ポリエステル樹脂、又はフェノール樹脂を好適に使用し得る。又、樹脂含浸量、即ち、樹脂の強化繊維シート補強材１０に対する塗布量は、強化繊維シート補強材１０の繊維目付が１５０〜６００ｇ／ｍ²の範囲では、標準塗布量として０．６〜１．２ｋｇ／ｍ²とされる。 The matrix resin (that is, the adhesive) impregnated in the reinforcing fiber sheet reinforcing material 10 when the reinforcing method of the present invention is carried out can be a thermosetting resin. Alternatively, a thermosetting epoxy resin, vinyl ester resin, MMA resin, unsaturated polyester resin, or phenol resin can be preferably used. The amount of resin impregnation, that is, the amount of resin applied to the reinforcing fiber sheet reinforcing material 10 is 0.6 to 1 as the standard applying amount when the fiber basis weight of the reinforcing fiber sheet reinforcing material 10 is in the range of 150 to 600 g / m ^2. ² kg / m ² .

（定着具）
図２（ａ）、（ｂ）を参照して、本発明の補強方法にて使用する定着具２０について説明する。 (Fixing device)
With reference to FIG. 2 (a), (b), the fixing tool 20 used with the reinforcement method of this invention is demonstrated.

図２（ａ）、（ｂ）に示すように、定着具２０は、定着体２１と、定着用強化繊維シート補強材３０とを有し、定着用強化繊維シート補強材３０は、その一端３１が定着体２１の周面に１回又は複数回巻き付けられ、樹脂（接着剤）にて定着体２１の周面に接着固定される。 2A and 2B, the fixing device 20 includes a fixing body 21 and a fixing reinforcing fiber sheet reinforcing material 30, and the fixing reinforcing fiber sheet reinforcing material 30 has one end 31 thereof. Is wound around the peripheral surface of the fixing body 21 once or a plurality of times, and is fixed to the peripheral surface of the fixing body 21 with a resin (adhesive).

一方、定着用強化繊維シート補強材３０の他端３２は、定着体２１の周面に接着されることなく、延在し、自由端とされる。定着用強化繊維シート補強材３０の幅（Ｗｘ）は、補強用強化繊維シート補強材１０と積層して互いに接合されるので、通常、補強用強化繊維シート補強材１０の幅、即ち、強化繊維シート１の幅（Ｗ０）と同じとされる。 On the other hand, the other end 32 of the fixing reinforcing fiber sheet reinforcing material 30 extends without being bonded to the peripheral surface of the fixing body 21 to be a free end. The width (Wx) of the reinforcing reinforcing fiber sheet reinforcing material 30 is laminated with the reinforcing reinforcing fiber sheet reinforcing material 10 and joined to each other. It is the same as the width (W0) of the sheet 1.

定着用強化繊維シート補強材３０の前記自由端３２の長さＬｆは、詳しくは、図１に関連して後述するように、補強用強化繊維シート補強材１０との継手部領域４０の長さＬｊをどの程度必要とするかによって決定されるものである。定着体２１の中央部から自由端先端までの長さをＬｆとすれば、Ｌｆは１００ｍｍ以上、通常、Ｌｆは１００〜５００ｍｍとされる。 The length Lf of the free end 32 of the reinforcing reinforcing fiber sheet reinforcing material 30 is the length of the joint region 40 with the reinforcing reinforcing fiber sheet reinforcing material 10, as will be described in detail later with reference to FIG. It is determined by how much Lj is required. If the length from the central portion of the fixing body 21 to the free end tip is Lf, Lf is 100 mm or more, and normally Lf is 100 to 500 mm.

先ず、定着体２１について説明する。定着体２１は、軸線方向に延在する、所謂、棒状の部材であって、軸線方向の長さ（Ｌｘ）は、定着用強化繊維シート補強材３０の幅（Ｗ０）と同じか、或いは幾分大きくされている。 First, the fixing member 21 will be described. The fixing member 21 is a so-called rod-like member extending in the axial direction, and the length (Lx) in the axial direction is the same as the width (W0) of the reinforcing reinforcing fiber sheet reinforcing material 30 or a certain number. Has been a minute bigger.

また、定着体２１は、本実施例では断面形状が長円形（トラック形）とされる柱状体とされる。即ち、本実施例にて、定着体２１は、横断面形状にて、平行な平面部２２ａ、２２ｂと、この平面部２２ａ、２２ｂに連接して形成される湾曲部２３ａ、２３ｂにて形成される。 In addition, the fixing body 21 is a columnar body whose cross-sectional shape is an oval (track shape) in this embodiment. In other words, in this embodiment, the fixing body 21 is formed of parallel plane portions 22a and 22b and curved portions 23a and 23b formed to be connected to the plane portions 22a and 22b in a cross-sectional shape. The

しかし、定着体２１は、上記形状に限定されるものではなく、定着用強化繊維シート補強材３０が巻き付けられる構造であれば、任意の形状とすることができる。例えば、図４（ａ）〜（ｆ）に示すように、断面形状が長円形（トラック形）とされる定着体（図４（ａ））のほかに、円形の定着体（図４（ｂ））、更に、長方形（図４（ｃ））、正方形（図４（ｄ））、三角形（図４（ｅ））などとされる隅角部が円弧状とされた多角形の定着体、また、断面形状が楕円形などとされる周面が曲面とされる定着体（図４（ｆ））、など種々の断面形状をした柱状体であるか、或いは、図示してはいないが中空形状の円筒体とされる棒状の定着体２１を使用することができる。 However, the fixing body 21 is not limited to the above shape, and may have any shape as long as the fixing reinforcing fiber sheet reinforcing material 30 is wound around. For example, as shown in FIGS. 4A to 4F, in addition to a fixing body (FIG. 4A) whose cross-sectional shape is an oval (track shape), a circular fixing body (FIG. 4B). )), And further, a polygonal fixing body in which corners such as rectangles (FIG. 4C), squares (FIG. 4D), and triangles (FIG. 4E) are arc-shaped, Further, it is a columnar body having various cross-sectional shapes such as a fixing body (FIG. 4 (f)) whose peripheral surface is an elliptical cross-section, or is hollow although not shown. A rod-shaped fixing body 21 having a cylindrical shape can be used.

定着用強化繊維シート補強材３０は、上記補強用強化繊維シート補強材１０と同じ構成とすることができる。 The fixing reinforcing fiber sheet reinforcing material 30 can have the same configuration as the reinforcing reinforcing fiber sheet reinforcing material 10.

つまり、定着用強化繊維シート補強材３０は、上述した強化繊維シート１を使用することができる。また、同じ構成の強化繊維シート１を複数枚、或いは、異なる構成の複数枚の強化繊維シート１を積層して構成しても良い。 That is, the reinforcing fiber sheet 1 described above can be used as the reinforcing reinforcing fiber sheet reinforcing material 30. Further, a plurality of reinforcing fiber sheets 1 having the same configuration or a plurality of reinforcing fiber sheets 1 having different configurations may be laminated.

定着用強化繊維シート補強材３０は、定着用強化繊維シート補強材３０の一端部３１を定着体２１の周面に巻き付け、樹脂にて接着固定される。例えば、定着用強化繊維シート補強材３０の一端部３１に樹脂を含浸させ、定着体２１の周面に巻き付け、接着固定することができる。必要に応じて、予め、定着体周面に樹脂（接着剤）を塗布しておいても良い。 The fixing reinforcing fiber sheet reinforcing material 30 is formed by winding one end portion 31 of the fixing reinforcing fiber sheet reinforcing material 30 around the peripheral surface of the fixing body 21 and bonding and fixing it with a resin. For example, one end portion 31 of the reinforcing reinforcing fiber sheet reinforcing material 30 can be impregnated with resin and wound around the peripheral surface of the fixing body 21 to be bonded and fixed. If necessary, a resin (adhesive) may be applied to the peripheral surface of the fixing body in advance.

なお、樹脂は、定着用強化繊維シート補強材３０の全体に含浸して、硬化することもできるが、定着用強化繊維シート補強材３０の定着体２１に巻き付けた部分のみに塗布（含浸）して、硬化し、定着体２１の周面に巻き付けられていない部分には、樹脂を含浸させないのが好ましい。もし、定着用強化繊維シート補強材３０として、樹脂が含浸され、半硬化状態とされたプリプレグシートを使用した場合には、定着用強化繊維シート補強材３０は、定着体２１に巻き付けた部分のみを硬化し、その他の領域は、樹脂を硬化させないのが好ましい。それは、定着具２０をコンクリート構造物の被補強面、即ち、貼着面１０１に接着する際、定着用強化繊維シート補強材３０が構造物の補強面の凹凸に追従して有効に接着するようにするためである。 The resin can be impregnated in the entire fixing reinforcing fiber sheet reinforcing material 30 and cured, but is applied (impregnated) only to a portion of the fixing reinforcing fiber sheet reinforcing material 30 wound around the fixing body 21. Thus, it is preferable that the resin is not impregnated into a portion which is cured and is not wound around the peripheral surface of the fixing body 21. If a prepreg sheet that has been impregnated with resin and is in a semi-cured state is used as the reinforcing reinforcing fiber sheet reinforcing material 30, the fixing reinforcing fiber sheet reinforcing material 30 has only a portion wound around the fixing body 21. It is preferable not to cure the resin in other regions. That is, when the fixing tool 20 is bonded to the surface to be reinforced of the concrete structure, that is, the bonding surface 101, the fixing reinforcing fiber sheet reinforcing material 30 follows the unevenness of the reinforcing surface of the structure and effectively bonds. It is to make it.

使用する樹脂（接着剤）は、上述した補強用強化繊維シート補強材１０に含浸されるマトリクス樹脂と同じとすることができ、熱硬化性樹脂が好ましく、上記種々の熱硬化性樹脂を使用することができる。 The resin (adhesive) to be used can be the same as the matrix resin impregnated in the reinforcing reinforcing fiber sheet reinforcing material 10 described above, preferably a thermosetting resin, and the above-described various thermosetting resins are used. be able to.

また、詳しくは、後述するように、定着具２０は、例えばアンカーのような固定具２５によりコンクリート構造物１００に取り付けられる。従って、定着用強化繊維シート補強材３０が巻き付けられた定着体２１には、図２（ｂ）に図示するように、定着体２１の軸線方向に所定の間隔Ｐｘにて、複数の、本実施例では、２個の貫通孔、即ち、アンカー孔２４が穿設される。 Further, as will be described in detail later, the fixing tool 20 is attached to the concrete structure 100 by a fixing tool 25 such as an anchor. Therefore, the fixing body 21 around which the reinforcing reinforcing fiber sheet reinforcing material 30 is wound is provided with a plurality of the present embodiments at a predetermined interval Px in the axial direction of the fixing body 21 as shown in FIG. In the example, two through holes, that is, anchor holes 24 are formed.

このとき、貫通孔の周囲の定着用強化繊維シート補強材３０は、アンカー孔２４を避けるように、両側に寄せ、アンカー孔２４を穿設することにより、切断されることがないようにするのが好ましい。 At this time, the reinforcing reinforcing fiber sheet reinforcing material 30 around the through hole is moved to both sides so as to avoid the anchor hole 24, and the anchor hole 24 is formed so as not to be cut. Is preferred.

アンカー孔２４の穿設位置は上記実施例に限定されるものではない。図３（ａ）、（ｂ）に他の実施例を示す。 The drilling position of the anchor hole 24 is not limited to the above embodiment. FIGS. 3A and 3B show another embodiment.

図３（ａ）の実施例によれば、アンカー孔２４は、定着用強化繊維シート補強材３０が巻き付けられた領域ではない位置、即ち、定着体２１の軸線方向において、定着用強化繊維シート補強材３０が巻き付けられた領域よりも軸線方向外方の位置に形成されている。この実施例は、コンクリート梁１００における補強用強化繊維シート補強材１０の貼着面１０１の幅が、貼付される補強用強化繊維シート補強材１０の幅（Ｗ０）より大きく、梁１００の貼着面１０１にアンカー２５のための削孔が可能な場合には、好適に採用し得る。 According to the embodiment of FIG. 3 (a), the anchor hole 24 is in a position that is not an area around which the fixing reinforcing fiber sheet reinforcing material 30 is wound, that is, in the axial direction of the fixing body 21. It is formed at a position outward in the axial direction with respect to the region around which the material 30 is wound. In this embodiment, the width of the sticking surface 101 of the reinforcing reinforcing fiber sheet reinforcing material 10 in the concrete beam 100 is larger than the width (W0) of the reinforcing reinforcing fiber sheet reinforcing material 10 to be stuck, and the sticking of the beam 100 is performed. If the surface 101 can be drilled for the anchor 25, it can be preferably used.

又、図３（ｂ）の実施例によれば、定着体２１は、その軸線方向長さ（Ｌｘ）が、定着用強化繊維シート補強材３０の幅（Ｗ０）と実質的に同じか或いは若干長くされ、その両端面に一体に支持板２６の一端が取り付けられている。支持板２６は、他端がコンクリート梁１００の側面部１０２へと延在しており、また、支持板２６にはアンカー２５を挿通させるための貫通孔２４が形成されている。 Further, according to the embodiment of FIG. 3B, the fixing member 21 has an axial length (Lx) substantially the same as or slightly the width (W0) of the reinforcing reinforcing fiber sheet reinforcing material 30. One end of the support plate 26 is integrally attached to both end faces thereof. The other end of the support plate 26 extends to the side surface portion 102 of the concrete beam 100, and the support plate 26 is formed with a through hole 24 through which the anchor 25 is inserted.

従って、定着用強化繊維シート補強材３０の端部が巻き付けられた定着体２１は、支持板２６の貫通孔２４を利用して、アンカー２５によりコンクリート構造物１００の側面部１０２に取り付けられる。この実施例は、コンクリート梁１００における補強用強化繊維シート補強材１０の貼着面１０１の幅が、貼付される補強用強化繊維シート補強材１０の幅（Ｗ０）と実質的に同じ大きさとされるか、或いは、梁１００の貼着面１０１にアンカー２５のための削孔が極めて困難な場合に、好適に採用される。 Therefore, the fixing body 21 around which the end portion of the fixing reinforcing fiber sheet reinforcing material 30 is wound is attached to the side surface portion 102 of the concrete structure 100 by the anchor 25 using the through hole 24 of the support plate 26. In this embodiment, the width of the sticking surface 101 of the reinforcing reinforcing fiber sheet reinforcing material 10 in the concrete beam 100 is substantially the same as the width (W0) of the reinforcing reinforcing fiber sheet reinforcing material 10 to be applied. Alternatively, it is preferably employed when drilling for the anchor 25 is extremely difficult on the sticking surface 101 of the beam 100.

本発明者らは、定着具２０における定着体２１の形状と、強化繊維シート１の巻き付け回数との関連について検討した。次に、その検討結果について説明する。 The inventors examined the relationship between the shape of the fixing body 21 in the fixing tool 20 and the number of windings of the reinforcing fiber sheet 1. Next, the examination result will be described.

（試験１）
図６に、本検討に使用した試験装置２００の概略構成を示す。 (Test 1)
FIG. 6 shows a schematic configuration of the test apparatus 200 used in this study.

図示するように、定着体２１としては、断面が円形とされる長さ（Ｌｘ）が６．８ｃｍの円柱体を使用した。定着体２１は、両端面に一体に形成した取付部２０Ｆを固定治具２０１の上に載置し、取付具２０２にて回転しないようにして固定した。定着体２１の直径（Ｄ）は、下記表１に示すように、２０ｍｍ、４０ｍｍ、６０ｍｍのものを用意した。 As shown in the figure, a cylindrical body having a circular section (Lx) of 6.8 cm was used as the fixing body 21. The fixing body 21 was mounted on a fixing jig 201 with mounting portions 20F formed integrally on both end surfaces, and fixed by a mounting tool 202 so as not to rotate. The diameter (D) of the fixing member 21 was 20 mm, 40 mm, and 60 mm as shown in Table 1 below.

定着用強化繊維シート補強材３０としては、図１１に示す構成の、強化繊維として炭素繊維を一方向に引き揃えて作製された炭素繊維シート１を使用した。本検討で使用した炭素繊維シート１は、日鉄コンポジット株式会社製の高強度型の炭素繊維シートＦＴＳ−Ｃ１−３０（公称引張強度３４００Ｎ／ｍｍ²）を用いた。炭素繊維シート１の幅（Ｗ０）は、１２．５ｍｍであった。 As the reinforcing reinforcing fiber sheet reinforcing material 30, the carbon fiber sheet 1 having the configuration shown in FIG. 11 and made by aligning carbon fibers as reinforcing fibers in one direction was used. As the carbon fiber sheet 1 used in this study, a high-strength carbon fiber sheet FTS-C1-30 (nominal tensile strength 3400 N / mm ² ) manufactured by Nippon Steel Composite Co., Ltd. was used. The width (W0) of the carbon fiber sheet 1 was 12.5 mm.

炭素繊維シート１は、その一方の端部を、図示するように、円形断面を有する定着体２１に巻き付け、定着体２１の周面にエポキシ樹脂で固定した。 As shown in the drawing, the carbon fiber sheet 1 was wound around a fixing body 21 having a circular cross section, and fixed to the peripheral surface of the fixing body 21 with an epoxy resin.

一方、炭素繊維シート１の他方の端部（タブ付け部）１Ｆは、定着体２１から上方へと垂直に持ち上げ、引張試験装置（図示せず）に取り付けた。炭素繊維シート１の上端タブ付け部１Ｆの長さ（Ｌ１）は６０ｍｍ、タブ付け部１Ｆから定着体２１に対する巻き付け開始部までの長さ（Ｌ２）は２５０ｍｍであった。 On the other hand, the other end portion (tab attaching portion) 1F of the carbon fiber sheet 1 was lifted vertically upward from the fixing body 21 and attached to a tensile test apparatus (not shown). The length (L1) of the upper end tab attaching portion 1F of the carbon fiber sheet 1 was 60 mm, and the length (L2) from the tab attaching portion 1F to the winding start portion with respect to the fixing body 21 was 250 mm.

実験変数は、定着体２１の円柱断面の直径（Ｄ）と巻き付け回数とした。 The experimental variables were the diameter (D) of the cylindrical section of the fixing body 21 and the number of windings.

炭素繊維シート試験片１は、７体とし、また、予め、炭素繊維シート１の物性を調べるために通常の連続繊維シートの引張試験を行った。 The carbon fiber sheet test piece 1 was made into seven bodies, and in order to examine the physical properties of the carbon fiber sheet 1, a normal continuous fiber sheet tensile test was performed in advance.

試験結果として、引張強度の平均値を、表１及び図７に示す。この試験結果から、直径が２０ｍｍの円形断面を持つ定着体２１に巻くことにより、炭素繊維シート１が破断に至ることが確認された。又、定着体２１を用いた試験片は、定着体２１の径と、定着体２１への試験片の巻き数とが大きいほど強度がでることが分かった。 As test results, the average values of tensile strength are shown in Table 1 and FIG. From this test result, it was confirmed that the carbon fiber sheet 1 was broken by being wound around the fixing body 21 having a circular cross section with a diameter of 20 mm. It was also found that the strength of the test piece using the fixing body 21 increases as the diameter of the fixing body 21 and the number of windings of the test piece around the fixing body 21 increase.

定着体２１の直径（Ｄ）が４０ｍｍ、６０ｍｍで、２周巻きの試験片では、公称引張強度（３４００Ｎ／ｍｍ²）を上回る。 The fixing member 21 has a diameter (D) of 40 mm and 60 mm, and exceeds the nominal tensile strength (3400 N / mm ² ) in a two-turn test piece.

破断位置は、いずれの試験体も定着体近傍の破断が主であった。巻き付け位置において繊維方向が変化するため、応力集中が定着体近傍で起こっていると考えられる。 As for the breaking position, all of the specimens were mainly broken in the vicinity of the fixing body. Since the fiber direction changes at the winding position, it is considered that stress concentration occurs near the fixing body.

定着体２１の直径（Ｄ）が大きいほど応力集中が小さくなるため、直径（Ｄ）が４０ｍｍ以上で且つ２周以上巻き付けることが好ましいと考えられる。 Since the stress concentration becomes smaller as the diameter (D) of the fixing body 21 is larger, it is considered preferable that the diameter (D) is 40 mm or more and it is wound more than two times.

（試験２）
試験１とは異なる炭素繊維シート１を使用し、定着体２１の直径（Ｄ）としては、下記表２に示すように、４０ｍｍ、６０ｍｍのものを使用した以外は、試験１と同じ試験装置２００を使用し、同様の試験片を作製し、同様の方法にて、試験を行った。 (Test 2)
The same test apparatus 200 as in Test 1 except that a carbon fiber sheet 1 different from Test 1 is used, and the diameter (D) of the fixing body 21 is 40 mm or 60 mm as shown in Table 2 below. The same test piece was produced using this and tested in the same manner.

この試験２で使用した炭素繊維シート１は、図１１に示す構成の、強化繊維として炭素繊維を一方向に引き揃えて作製された、日鉄コンポジット株式会社製の高強度型の炭素繊維シートＦＴＳ−Ｃ１−６０（公称引張強度３４００Ｎ／ｍｍ²）を用いた。炭素繊維シート１の幅（Ｗ０）は、試験１の場合と同様に、１２．５ｍｍであった。 The carbon fiber sheet 1 used in this test 2 is a high-strength carbon fiber sheet FTS manufactured by Nittsu Composite Co., Ltd., produced by aligning carbon fibers as reinforcing fibers in one direction, having the configuration shown in FIG. -C1-60 (nominal tensile strength 3400 N / mm ² ) was used. The width (W0) of the carbon fiber sheet 1 was 12.5 mm, as in Test 1.

試験結果として、引張強度の平均値を、表２及び図８に示す。この試験結果から、直径（Ｄ）が２０ｍｍの円形断面を持つ定着体２１に巻くことにより、炭素繊維シート１が破断に至ることが確認された。又、定着体２１を用いた試験片は、定着体２１の径と、定着体２１への試験片の巻き数とが大きいほど強度がでることが分かった。 As a test result, the average value of tensile strength is shown in Table 2 and FIG. From this test result, it was confirmed that the carbon fiber sheet 1 was broken by being wound around the fixing body 21 having a circular cross section with a diameter (D) of 20 mm. It was also found that the strength of the test piece using the fixing body 21 increases as the diameter of the fixing body 21 and the number of windings of the test piece around the fixing body 21 increase.

（補強方法）
次に、図１及び図２を参照して、本発明の補強方法の一実施例について説明する。本実施例ではコンクリート梁１００を曲げ補強するものとする。 (Reinforcing method)
Next, an embodiment of the reinforcing method of the present invention will be described with reference to FIGS. In this embodiment, the concrete beam 100 is bent and reinforced.

尚、本実施例では、強化繊維シート１は、繊維径７〜１０μｍ程度のモノフィラメントを、例えば、約６０００〜２４０００本収束した繊維束、即ち、炭素繊維２を使用し、この炭素繊維を均一に引き揃え、一方向に配列した炭素繊維シートであった。炭素繊維シートの厚さは０．０８３〜０．３３３ｍｍ（繊維目付１５０〜６００ｇ／ｍ²）であった。 In this embodiment, the reinforcing fiber sheet 1 uses a monofilament having a fiber diameter of about 7 to 10 μm, for example, a fiber bundle in which about 6000 to 24,000 fibers are converged, that is, carbon fibers 2, and the carbon fibers are uniformly distributed. The carbon fiber sheets were aligned and aligned in one direction. The thickness of the carbon fiber sheet was 0.083 to 0.333 mm (fiber basis weight 150 to 600 g / m ² ).

本実施例に従って補強用強化繊維シート補強材１０及び定着用強化繊維シート補強材３０は、上記強化繊維シート１を１枚、或いは、複数枚積層して作製することができる。 According to this embodiment, the reinforcing reinforcing fiber sheet reinforcing material 10 and the fixing reinforcing fiber sheet reinforcing material 30 can be produced by laminating one or a plurality of the reinforcing fiber sheets 1.

補強用強化繊維シート補強材１０は、補強すべき貼着面の幅及び長さに適合する寸法とされる。本実施例では、幅（Ｗ０）４００ｍｍ、長さ（Ｌ０）２５００ｍｍとした。また、定着用強化繊維シート補強材３０は、補強用強化繊維シート補強材１０と同じ構成とした。 The reinforcing reinforcing fiber sheet reinforcing material 10 has dimensions that match the width and length of the sticking surface to be reinforced. In this embodiment, the width (W0) is 400 mm and the length (L0) is 2500 mm. The reinforcing reinforcing fiber sheet reinforcing material 30 has the same configuration as the reinforcing reinforcing fiber sheet reinforcing material 10.

定着具２０としては、本実施例では、図２（ａ）、（ｂ）に示すように、両端湾曲部２３ａ、２３ｂと上下の平面部２２ａ、２２ｂとにて形成される断面形状が長円形（トラック形）の柱状体を使用した。具体的には、定着体２１は鋼材にて作製し、両端円弧状部の半径Ｒは、２０ｍｍ、幅Ｌｙは、９４ｍｍ、軸線方向の長さＬｘは、定着用強化繊維シート補強材３０の幅Ｗ０と同じ４００ｍｍとした。 In this embodiment, as the fixing device 20, as shown in FIGS. 2A and 2B, the cross-sectional shape formed by the both-end curved portions 23a and 23b and the upper and lower flat portions 22a and 22b is an oval. A (track-shaped) columnar body was used. Specifically, the fixing body 21 is made of a steel material, the radius R of the arc-shaped portions at both ends is 20 mm, the width Ly is 94 mm, and the length Lx in the axial direction is the width of the reinforcing reinforcing fiber sheet reinforcing material 30. It was set to 400 mm which is the same as W0.

上記定着体２１に、定着用強化繊維シート補強材３０の一端３１を、１．５〜２回巻き付け、エポキシ樹脂にて定着体２１の周面に接着して硬化した。残余部分３２には樹脂含浸はしなかった。樹脂未含浸の長さＬｆは、３４７ｍｍであった。定着用強化繊維シート補強材３０の定着体２１の周面に接着された樹脂含浸部３１と未含浸部３２と連接部は、本実施例のように、断面形状が長円形（トラック形）とされる柱状体を使用した場合には、平面部２２ａの中央部近傍にて連続するのが好ましい。 One end 31 of the reinforcing reinforcing fiber sheet reinforcing material 30 was wound around the fixing body 21 1.5 to 2 times, and adhered to the peripheral surface of the fixing body 21 with an epoxy resin and cured. The remaining portion 32 was not impregnated with resin. The resin non-impregnated length Lf was 347 mm. The resin-impregnated portion 31, the non-impregnated portion 32, and the connecting portion adhered to the peripheral surface of the fixing body 21 of the reinforcing reinforcing fiber sheet reinforcing material 30 have an oval cross section (track shape) as in this embodiment. When the columnar body is used, it is preferable that the columnar body is continuous in the vicinity of the central portion of the flat surface portion 22a.

定着体２１には、互いに平行な平面部２２ａ、２２ｂを貫くようにして、長手方向に対称配置にて間隔（Ｐｘ）２２０ｍｍにて、直径３１ｍｍのアンカー孔２４を形成した。 The fixing body 21 was formed with anchor holes 24 having a diameter of 31 mm at intervals (Px) of 220 mm in a symmetrical arrangement in the longitudinal direction so as to penetrate the plane portions 22a and 22b parallel to each other.

本実施例では、アンカー孔２４を形成するに際して強化繊維を切断しないように、定着用強化繊維シート補強材３０は、定着体２１に巻き付け、樹脂接着後、硬化する前に、アンカー孔周辺の強化繊維は、アンカー孔２４の両側にずらし、強化繊維が存在しないアンカー孔形成領域Ｓを設けた。 In this embodiment, the reinforcing reinforcing fiber sheet reinforcing material 30 is wound around the fixing body 21 and is strengthened around the anchor hole before being cured after being bonded to the resin so that the reinforcing fiber is not cut when the anchor hole 24 is formed. The fiber was shifted to both sides of the anchor hole 24 to provide an anchor hole forming region S where no reinforcing fiber was present.

尚、補強用強化繊維シート補強材１０は、構造物１００の貼着面１０１に貼着されるが、本明細書にて、「内側」とは、コンクリート梁１００のような構造物のシート貼着面１０１側を意味し、「外側」とはこのシート貼着面１０１より離れる方向を意味する。又、強化繊維シート補強材１０がシート貼着面１０１に接着され補強に供される際の、強化繊維シート補強材１０の両端部から中央部に向かう方向を「内方」とし、その両端部側を「外方」と呼ぶ。 The reinforcing reinforcing fiber sheet reinforcing material 10 is stuck to the sticking surface 101 of the structure 100. In this specification, “inner side” means a sheet sticking of a structure such as the concrete beam 100. The attachment surface 101 side is meant, and “outside” means a direction away from the sheet attachment surface 101. Further, when the reinforcing fiber sheet reinforcing material 10 is bonded to the sheet adhering surface 101 and used for reinforcement, the direction from both ends of the reinforcing fiber sheet reinforcing material 10 toward the center is defined as “inward”, and the both end portions The side is called “outside”.

本実施例では、図１（ａ）、（ｂ）に示すように、補強すべきコンクリート梁１００の被補強面、即ち、シート貼着面１０１には、その両端領域に位置して、定着具２０、２０が配置される。本実施例のように、定着体２１の断面形状が長円形とされる場合には、定着用強化繊維シート補強材３０の未含浸部分３２が位置する定着体２１の平面部２２ａがシート貼着面１０１に接合するようにして配置される。定着体２１の平面部２２ａ及び定着用繊維強化シート補強材３０の自由端部３２と、シート貼着面１０１との間には、接着剤を下塗りしておくのが好ましい。 In this embodiment, as shown in FIGS. 1 (a) and 1 (b), the fixing surface of the concrete beam 100 to be reinforced, that is, the sheet adhering surface 101, is located at both end regions. 20 and 20 are arranged. When the cross-sectional shape of the fixing body 21 is oblong as in the present embodiment, the flat portion 22a of the fixing body 21 where the unimpregnated portion 32 of the reinforcing reinforcing fiber sheet reinforcing material 30 is located is attached to the sheet. It arrange | positions so that it may join to the surface 101. FIG. It is preferable to undercoat an adhesive between the flat portion 22 a of the fixing body 21 and the free end portion 32 of the fixing fiber-reinforced sheet reinforcing material 30 and the sheet sticking surface 101.

次に、定着具２０は、定着体２１に形成されたアンカー孔２４を利用して、固定具としてのアンカー２５によりコンクリート構造物１００に取り付けられる。この状態で、定着具２０の定着用強化繊維シート補強材３０とシート貼着面１０１との間に塗布された樹脂が硬化され、定着具２０がコンクリート構造物１００に固着される。 Next, the fixing tool 20 is attached to the concrete structure 100 by the anchor 25 as a fixing tool using the anchor hole 24 formed in the fixing body 21. In this state, the resin applied between the fixing reinforcing fiber sheet reinforcing material 30 of the fixing tool 20 and the sheet attaching surface 101 is cured, and the fixing tool 20 is fixed to the concrete structure 100.

その後、本実施例によれば、図１（ａ）、（ｂ）に示すように、両定着具２０、２０の間のコンクリート梁シート貼着面１０１に接着剤を下塗りし、そして、準備された補強用強化繊維シート補強材１０をコンクリート梁シート貼着面１０１に貼り付ける。 Thereafter, according to the present embodiment, as shown in FIGS. 1A and 1B, an adhesive is primed on the concrete beam sheet adhering surface 101 between the two fixing tools 20 and 20, and prepared. The reinforcing reinforcing fiber sheet reinforcing material 10 is attached to the concrete beam sheet attaching surface 101.

このとき、補強用強化繊維シート補強材１０と定着用強化繊維シート補強材３０とは、長手方向にて所定長さＬｊだけ重なり合う継手部４０を形成するように積層して接合される。本発明者らの研究実験の結果によると、この継手部４０の長さＬｊは、補強用強化繊維シート補強材１０の端部を定着するには、５０〜５００ｍｍ程度とすることにより良好な結果を達成し得ることが分かった。本実施例では、２００ｍｍとした。 At this time, the reinforcing reinforcing fiber sheet reinforcing material 10 and the fixing reinforcing fiber sheet reinforcing material 30 are laminated and joined so as to form a joint portion 40 that overlaps by a predetermined length Lj in the longitudinal direction. According to the results of the research experiments by the present inventors, the length Lj of the joint portion 40 is preferably about 50 to 500 mm in order to fix the end portion of the reinforcing reinforcing fiber sheet reinforcing material 10. It was found that can be achieved. In this example, it was 200 mm.

次いで、コンクリート梁シート貼着面１０１に貼着した補強用強化繊維シート補強材１０に対して、脱泡ローラ（図示せず）を使用して脱泡・含浸させる。更に、必要に応じて、補強用強化繊維シート補強材１０に接着剤、即ち、マトリクス樹脂を塗布（上塗り）し、強化繊維シート補強材１０にマトリクス樹脂を十分に含浸させ、強化繊維シート補強材１０をコンクリート梁シート貼着面１０１に接着する。そして、硬化させる。 Next, the reinforcing reinforcing fiber sheet reinforcing material 10 attached to the concrete beam sheet attaching surface 101 is defoamed and impregnated using a defoaming roller (not shown). Furthermore, if necessary, an adhesive, that is, a matrix resin is applied (overcoated) to the reinforcing reinforcing fiber sheet reinforcing material 10, and the reinforcing fiber sheet reinforcing material 10 is sufficiently impregnated with the matrix resin, thereby reinforcing the reinforcing fiber sheet reinforcing material. 10 is bonded to the concrete beam sheet attaching surface 101. Then, it is cured.

上記実施例では、図１（ａ）、（ｂ）に示すように、コンクリート梁１００のシート貼着面１０１には、補強用強化繊維シート補強材１０と、その両端に配置された定着具２０、２０とにて構成される補強層が一層だけ貼着されるものとして説明した。 In the said Example, as shown to Fig.1 (a), (b), in the sheet sticking surface 101 of the concrete beam 100, the reinforcing fiber sheet reinforcing material 10 for reinforcement and the fixing tool 20 arrange | positioned at the both ends are provided. , 20 and the reinforcing layer composed of only one layer has been described.

つまり、上記構成の本実施例の補強方法は、構造物１００の貼着面１０１に細長形状の補強用強化繊維シート補強材１０を樹脂で接着することにより構造物を補強する補強方法において、
（ａ）構造物１００の貼着面１０１の両端領域に位置して、上記構成の定着具２０を配置し、少なくとも、定着具２０から延在した定着用強化繊維シート補強材３２を貼着面１０１に樹脂にて接着し、且つ、定着具２０の定着体２１を固定具２５にて構造物１００に固定し、
（ｂ）両定着具２０、２０の間の構造物１００の貼着面１０１に、両端継手領域４０が、両定着具２０、２０の定着用強化繊維シート補強材３２と接合するようにして、補強用強化繊維シート補強材１０を樹脂にて接着する、
構成とされる。 That is, the reinforcing method of the present embodiment having the above-described configuration is a reinforcing method for reinforcing a structure by adhering an elongated reinforcing reinforcing fiber sheet reinforcing material 10 to a sticking surface 101 of the structure 100 with a resin.
(A) The fixing device 20 having the above-described configuration is disposed at both end regions of the bonding surface 101 of the structure 100, and at least the fixing reinforcing fiber sheet reinforcing material 32 extending from the fixing device 20 is bonded to the bonding surface. 101 is bonded with resin, and the fixing body 21 of the fixing tool 20 is fixed to the structure 100 with the fixing tool 25.
(B) The both-end joint region 40 is bonded to the fixing reinforcing fiber sheet reinforcing material 32 of both the fixing tools 20, 20 on the sticking surface 101 of the structure 100 between the both fixing tools 20, 20, The reinforcing reinforcing fiber sheet reinforcing material 10 is bonded with resin.
It is supposed to be configured.

しかし、本発明はこれに限定されるものではなく、図５に示すように、更に、追加の補強層を積層することも可能である。 However, the present invention is not limited to this, and an additional reinforcing layer can be further laminated as shown in FIG.

図５の実施例によれば、図１（ａ）、（ｂ）に示すと同様にして、コンクリート梁１００のシート貼着面１０１に、第１の定着具２０Ａと第１の補強用強化繊維シート補強材１０Ａとを貼着して第１の補強層を形成する。 According to the embodiment of FIG. 5, the first fixing tool 20 </ b> A and the first reinforcing reinforcing fiber are applied to the sheet sticking surface 101 of the concrete beam 100 in the same manner as shown in FIGS. 1 (a) and 1 (b). The first reinforcing layer is formed by sticking the sheet reinforcing material 10A.

更に、本実施例によると、第１の定着具２０Ａと第１の補強用強化繊維シート補強材１０Ａとにて形成された第１の補強層の上に、第２の定着具２０Ｂと第２の補強用強化繊維シート補強材１０Ｂとを、同様の方法により、貼着し、第２の補強層を形成する。 Furthermore, according to the present embodiment, the second fixing tool 20B and the second fixing tool 20B are formed on the first reinforcing layer formed by the first fixing tool 20A and the first reinforcing reinforcing fiber sheet reinforcing material 10A. The reinforcing reinforcing fiber sheet reinforcing material 10B is adhered by the same method to form a second reinforcing layer.

勿論、必要に応じて、更に、第３層、第４層、といった補強層を形成することも可能である。 Of course, if necessary, a reinforcing layer such as a third layer or a fourth layer may be formed.

つまり、本実施例によれば、図５にて、
（ｃ）更に、上記第１層の補強層を構成する両第１の定着具２０Ａ、２０Ａの間の領域において、既に接着された第１の補強用強化繊維シート補強材１０Ａに重なるようにして上記構成の定着具である第２の定着具２０Ｂ、２０Ｂを配置し、少なくとも、第２の定着具２０Ｂから延在した第２の定着用強化繊維シート補強材３２Ｂを第１の補強用強化繊維シート補強材１０Ａに積層して樹脂にて接着し、且つ、第２の定着具２０Ｂの定着体２１Ｂを固定具２４にて構造物１００に固定し、
（ｄ）両第２の定着具２０Ｂ、２０Ｂの間の領域において、第１の補強用強化繊維シート補強材１０Ａに積層して、両端継手領域４０が、両第２の定着具２０Ｂ、２０Ｂの第２の定着用強化繊維シート補強材３２Ｂと接合するようにして、第２の補強用強化繊維シート補強材１０Ｂを樹脂にて接着し、
（ｅ）必要に応じて、前記（ｃ）、（ｄ）工程を繰り返す、
ことが可能である。 That is, according to the present embodiment, in FIG.
(C) Further, in the region between the first fixing devices 20A and 20A constituting the first reinforcing layer, the first reinforcing reinforcing fiber sheet reinforcing material 10A that has already been bonded is overlapped. The second fixing tools 20B and 20B, which are the fixing tools having the above-described configuration, are arranged, and at least the second fixing reinforcing fiber sheet reinforcing material 32B extending from the second fixing tool 20B is used as the first reinforcing reinforcing fiber. The sheet reinforcing material 10A is laminated and bonded with resin, and the fixing body 21B of the second fixing tool 20B is fixed to the structure 100 with the fixing tool 24.
(D) In the region between both the second fixing tools 20B, 20B, the two reinforcing joints 40B are laminated on the first reinforcing reinforcing fiber sheet reinforcing material 10A so that the both-end joint region 40 of the two fixing tools 20B, 20B. Adhering the second reinforcing reinforcing fiber sheet reinforcing material 10B with a resin so as to be joined to the second fixing reinforcing fiber sheet reinforcing material 32B,
(E) Repeat the steps (c) and (d) as necessary.
It is possible.

尚、複数の補強層を積層する場合には、外層の定着具は、内層の定着力を損なわないように、図５に示すように、内層の定着用及び補強用強化繊維シート補強材が積層された継手部４０の領域は避けて、補強用強化繊維シート補強材１０のみとされる領域に位置するように配置するのが好ましい。 In the case of laminating a plurality of reinforcing layers, the outer layer fixing tool is laminated with reinforcing fiber sheet reinforcing materials for fixing and reinforcing the inner layer as shown in FIG. 5 so as not to impair the fixing power of the inner layer. It is preferable to dispose the region of the joint portion 40 so as to be located in a region where only the reinforcing reinforcing fiber sheet reinforcing material 10 is used.

本実施例によれば、作業性が良く、また、強化繊維シート補強材の断面を欠損することがないか、或いは、最小限として、コンクリート構造物或いは鋼構造物のような構造物の補強を施工することができる。 According to this embodiment, the workability is good, and the cross section of the reinforcing fiber sheet reinforcing material is not lost or, as a minimum, the structure such as a concrete structure or a steel structure is reinforced. Can be constructed.

実施例２
上記実施例１では、先ず、定着具２０を構造物１００の貼着面１０１に接着して固定し、その後、補強用強化繊維シート補強材１０を、その両端部が、両定着具２０、２０の定着用強化繊維シート補強材３２と積層し、継手部４０を形成するようにして、樹脂にて接着し、固定する、構成とした。 Example 2
In the first embodiment, first, the fixing tool 20 is bonded and fixed to the sticking surface 101 of the structure 100, and then the reinforcing reinforcing fiber sheet reinforcing material 10 is fixed to both fixing tools 20, 20 at both ends. The fixing reinforcing fiber sheet reinforcing material 32 is laminated, and the joint portion 40 is formed, and is bonded and fixed with a resin.

これに対して、本実施例では、図９（ａ）、（ｂ）に示すように、先ず、補強用強化繊維シート補強材１０を、構造物１００の貼着面１０１に接着して固定し、その後、その両端部領域に両定着具２０、２０を配置し、両定着具２０、２０の定着用強化繊維シート補強材３２が、補強用強化繊維シート補強材１０の両端部に積層し、継手部４０を形成するようにして、樹脂にて接着し、固定する、構成とすることも可能である。 In contrast, in this example, as shown in FIGS. 9A and 9B, first, the reinforcing reinforcing fiber sheet reinforcing material 10 is bonded and fixed to the sticking surface 101 of the structure 100. Thereafter, the fixing devices 20 and 20 are disposed in the both end regions, and the fixing reinforcing fiber sheet reinforcing material 32 of the fixing devices 20 and 20 is laminated on both end portions of the reinforcing reinforcing fiber sheet reinforcing material 10, It is also possible to adopt a configuration in which the joint portion 40 is formed and bonded and fixed with resin.

つまり、本実施例によれば、構造物１００の貼着面１０１に細長形状の強化繊維シート補強材１０を樹脂で接着することにより構造物を補強する補強方法において、
（ａ）構造物１００の貼着面１０１に補強用強化繊維シート補強材１０を樹脂にて接着し、
（ｂ）補強用強化繊維シート補強材１０の両端領域に位置して、上記構成の定着具２０を配置し、少なくとも、定着具２０から延在した定着用強化繊維シート補強材３２を補強用強化繊維シート補強材１０の両端継手領域４０に積層して樹脂にて接着し、且つ、定着具２０の定着体２１を固定具２５にて構造物１００に固定する、
構成とされる。 That is, according to the present embodiment, in the reinforcing method for reinforcing the structure by adhering the elongated reinforcing fiber sheet reinforcing material 10 to the sticking surface 101 of the structure 100 with a resin,
(A) Adhering the reinforcing reinforcing fiber sheet reinforcing material 10 to the sticking surface 101 of the structure 100 with a resin;
(B) The fixing tool 20 having the above-described configuration is disposed at both end regions of the reinforcing reinforcing fiber sheet reinforcing material 10, and at least the fixing reinforcing fiber sheet reinforcing material 32 extending from the fixing tool 20 is strengthened for reinforcing. The fiber sheet reinforcing material 10 is laminated on both end joint regions 40 and bonded with resin, and the fixing body 21 of the fixing tool 20 is fixed to the structure 100 with the fixing tool 25.
It is supposed to be configured.

しかし、本発明はこれに限定されるものではなく、図１０に示すように、更に、追加の補強層を積層することも可能である。 However, the present invention is not limited to this, and an additional reinforcing layer can be further laminated as shown in FIG.

図１０の実施例によれば、図９（ａ）、（ｂ）に示すと同様にして、コンクリート梁１００のシート貼着面１０１に、第１の定着具２０Ａと第１の補強用強化繊維シート補強材１０Ａとを貼着して第１の補強層を形成する。 According to the embodiment of FIG. 10, the first fixing tool 20 </ b> A and the first reinforcing reinforcing fiber are formed on the sheet sticking surface 101 of the concrete beam 100 in the same manner as shown in FIGS. 9A and 9B. The first reinforcing layer is formed by sticking the sheet reinforcing material 10A.

つまり、本実施例によれば、図１０にて、
（ｃ）更に、両第１の定着具２０Ａの間の領域において、第１の補強用強化繊維シート補強材１０Ａに積層して、第２の補強用強化繊維シート補強材１０Ｂを樹脂にて接着し、
（ｄ）両第１の定着具２０Ａ、２０Ａの間の領域において、前記（ａ）工程にて接着された第１の補強用強化繊維シート補強材１０Ａに重なるようにして上記構成の第２の定着具２０Ｂを配置し、第２の定着具２０Ｂから延在した第２の定着用強化繊維シート補強材３２Ｂを第２の補強用強化繊維シート補強材１０Ｂの両端継手領域４０に積層して樹脂にて接着し、且つ、第２の定着具２０Ｂの定着体２１Ｂを固定具２５にて構造物１００に固定し、
（ｅ）必要に応じて、前記（ｃ）、（ｄ）工程を繰り返す、
ことが可能である。 That is, according to the present embodiment, in FIG.
(C) Further, in the region between both the first fixing devices 20A, the second reinforcing reinforcing fiber sheet reinforcing material 10B is laminated with the first reinforcing reinforcing fiber sheet reinforcing material 10A and is bonded with a resin. And
(D) In the region between both the first fixing devices 20A and 20A, the second reinforcing fiber sheet reinforcing material 10A bonded in the step (a) overlaps with the first reinforcing reinforcing fiber sheet reinforcing material 10A. A fixing tool 20B is disposed, and a second fixing reinforcing fiber sheet reinforcing material 32B extending from the second fixing tool 20B is laminated on both end joint regions 40 of the second reinforcing reinforcing fiber sheet reinforcing material 10B. And fixing the fixing body 21B of the second fixing tool 20B to the structure 100 with the fixing tool 25,
(E) Repeat the steps (c) and (d) as necessary.
It is possible.

尚、複数の補強層を積層する場合には、外層の定着具は、内層の定着力を損なわないように、図１０に示すように、内層の定着用及び補強用強化繊維シート補強材が積層された継手部４０の領域は避けて、補強用強化繊維シート補強材１０のみとされる領域に位置するように配置するのが好ましい。 In addition, when laminating a plurality of reinforcing layers, the outer layer fixing tool is laminated with reinforcing fiber sheet reinforcing materials for fixing and reinforcing the inner layer as shown in FIG. 10 so as not to impair the fixing power of the inner layer. It is preferable to dispose the region of the joint portion 40 so as to be located in a region where only the reinforcing reinforcing fiber sheet reinforcing material 10 is used.

本実施例においても、実施例１と同様に、作業性が良く、また、強化繊維シート補強材の断面を欠損することがないか、或いは、最小限として、コンクリート構造物或いは鋼構造物のような構造物の補強を施工することができる。 In this embodiment, as in the first embodiment, the workability is good, and the cross section of the reinforcing fiber sheet reinforcing material is not lost or, as a minimum, like a concrete structure or a steel structure. Reinforcement of simple structures can be performed.

実施例３
上記実施例１、２では、樹脂が未だ含浸されていない強化繊維シート１、即ち、補強用強化繊維シート補強材１０を使用し、コンクリート構造物表面に貼着するに際して、樹脂を強化繊維シート補強材１０に含浸させ、コンクリート構造物表面１０１に接着するものとしたが、既に樹脂が含浸されたプリプレグの形態とされる強化繊維シート補強材１０を使用することもできる。 Example 3
In Examples 1 and 2 described above, the reinforcing fiber sheet 1 not yet impregnated with the resin, that is, the reinforcing reinforcing fiber sheet reinforcing material 10 is used, and the resin is reinforced with the reinforcing fiber sheet when the resin is stuck to the concrete structure surface. Although the material 10 is impregnated and adhered to the surface 101 of the concrete structure, the reinforcing fiber sheet reinforcing material 10 in the form of a prepreg already impregnated with a resin can also be used.

つまり、予めマトリクス樹脂を含浸し、プリプレグの形態とされる樹脂含浸強化繊維シート補強材１０、即ち、プリプレグシートを接着剤にてコンクリート構造物などの貼着面１０１に接着することも可能である。 That is, it is also possible to pre-impregnate the matrix resin and pre-form the resin-impregnated reinforcing fiber sheet reinforcing material 10, that is, the prepreg sheet to the bonding surface 101 such as a concrete structure with an adhesive. .

また、同様に、定着具においては、定着体に巻き付け固定された部分以外の定着用強化繊維シート補強材３２も又、コンクリート構造物表面に貼着するに際して、樹脂を強化繊維シート補強材１０に含浸させ、コンクリート構造物表面１０１に接着するものとしたが、定着用強化繊維シート補強材３０として、既に樹脂が含浸されたプリプレグの形態とされる定着用強化繊維シート補強材３０を使用することもできる。この場合には、上述したように、定着体２１に巻き付けた部分のみが硬化されているのが好ましい。 Similarly, in the fixing tool, when the reinforcing reinforcing fiber sheet reinforcing material 32 other than the portion wound and fixed to the fixing body is also adhered to the surface of the concrete structure, the resin is applied to the reinforcing fiber sheet reinforcing material 10. Although impregnated and adhered to the concrete structure surface 101, the fixing reinforcing fiber sheet reinforcing material 30 in the form of a prepreg already impregnated with resin is used as the fixing reinforcing fiber sheet reinforcing material 30. You can also. In this case, as described above, it is preferable that only the portion wound around the fixing body 21 is cured.

本実施例においても、マトリクス樹脂は、実施例１で説明したと同様に、熱硬化性樹脂とすることができ、熱硬化性樹脂としては、常温硬化型或は熱硬化型のエポキシ樹脂、ビニールエステル樹脂、ＭＭＡ樹脂、不飽和ポリエステル樹脂、又はフェノール樹脂を好適に使用し得る。 Also in this embodiment, the matrix resin can be a thermosetting resin as described in the first embodiment. As the thermosetting resin, a room temperature curable epoxy resin, a thermosetting epoxy resin, a vinyl resin can be used. An ester resin, an MMA resin, an unsaturated polyester resin, or a phenol resin can be preferably used.

本発明に従った構造物の補強方法の一実施例を説明するための図である。It is a figure for demonstrating one Example of the reinforcement method of the structure according to this invention. 本発明に従った定着具の一実施例を説明するための図である。It is a figure for demonstrating one Example of the fixing tool according to this invention. 本発明に従った定着具の他の実施例を説明するための図である。It is a figure for demonstrating the other Example of the fixing tool according to this invention. 定着体の構成を示す断面図である。FIG. 3 is a cross-sectional view illustrating a configuration of a fixing body. 本発明に従った構造物の補強方法の他の実施例を説明するための図である。It is a figure for demonstrating the other Example of the reinforcement method of the structure according to this invention. 本発明に従った構造物の補強方法の効果を検討するための試験装置の概略構成図である。It is a schematic block diagram of the testing apparatus for examining the effect of the reinforcement method of the structure according to this invention. 定着体の直径と巻き数と、引張強度との関係を示すグラフである。3 is a graph showing the relationship between the diameter and the number of windings of a fixing body and the tensile strength. 定着体の直径と巻き数と、引張強度との関係を示すグラフである。3 is a graph showing the relationship between the diameter and the number of windings of a fixing body and the tensile strength. 本発明に従った構造物の補強方法の他の実施例を説明するための図である。It is a figure for demonstrating the other Example of the reinforcement method of the structure according to this invention. 本発明に従った構造物の補強方法の他の実施例を説明するための図である。It is a figure for demonstrating the other Example of the reinforcement method of the structure according to this invention. 本発明にて使用することのできる強化繊維シートの一実施例を示す斜視図である。It is a perspective view which shows one Example of the reinforced fiber sheet which can be used by this invention. 本発明にて使用することのできる強化繊維シートの他の実施例を示す斜視図である。It is a perspective view which shows the other Example of the reinforcing fiber sheet which can be used by this invention. 従来の構造物の補強方法における強化繊維シートの定着方法を説明するための図である。It is a figure for demonstrating the fixing method of the reinforced fiber sheet in the reinforcement method of the conventional structure. 従来の構造物の補強方法における強化繊維シートの定着方法を説明するための図である。It is a figure for demonstrating the fixing method of the reinforced fiber sheet in the reinforcement method of the conventional structure. 先の提案に係る構造物の補強方法における強化繊維シートの定着方法を説明するための図である。It is a figure for demonstrating the fixing method of the reinforced fiber sheet in the reinforcing method of the structure based on the previous proposal.

Explanation of symbols

１強化繊維シート
２強化繊維
３支持体
４強化繊維層
５バラケ止め繊維
１０補強用強化繊維シート補強材
２０定着具
２１定着体
２４定着体貫通孔
２５アンカー（固定具）
２６支持板
３０定着用強化繊維シート補強材
３１定着用強化繊維シート補強材の巻付け部
３２定着用強化繊維シート補強材の自由端部
１００構造物
１０１構造物貼着面
１０２構造物側面 DESCRIPTION OF SYMBOLS 1 Reinforcing fiber sheet 2 Reinforcing fiber 3 Support body 4 Reinforcing fiber layer 5 Anti-separation fiber 10 Reinforcing reinforcing fiber sheet reinforcing material 20 Fixing tool 21 Fixing body 24 Fixing body through hole 25 Anchor (fixing tool)
26 support plate 30 reinforcing fiber sheet reinforcing material for fixing 31 winding portion of reinforcing fiber sheet reinforcing material for fixing 32 free end of reinforcing fiber sheet reinforcing material for fixing 100 structure 101 structure attaching surface 102 structure side surface

Claims

A rod-like fixing body extending in the axial direction that can be fixed to the structure by a fixing tool;
It is made of a reinforcing fiber sheet that is in the form of a sheet having a predetermined width and length, one end region is wound around the peripheral surface of the fixing body, and is adhesively fixed to the peripheral surface of the fixing body with a resin, The remaining region is a fixing reinforcing fiber sheet reinforcing material extending from the fixing body without being adhesively fixed to the peripheral surface of the fixing body, and
A fixing device characterized by comprising:

The fixing body has an axial length equal to or somewhat larger than the width of the fixing reinforcing fiber sheet reinforcing material, and has a cross-sectional shape of a circle, an ellipse, an oval, or a corner portion. The fixing device according to claim 1, wherein the fixing tool is a polygonal columnar body or a cylindrical body.

In the reinforcing reinforcing fiber sheet reinforcing material, the region extending from the fixing body without being bonded and fixed to the peripheral surface of the fixing body is not impregnated with resin or impregnated with resin. 3. The fixing device according to claim 1, wherein the fixing device is a semi-cured prepreg sheet, or is impregnated with a resin and cured.

The fixing reinforcing fiber sheet reinforcing material is at least one unidirectionally arranged reinforcing fiber sheet in which reinforcing fibers are arranged in one direction, or at least one reinforcing fiber sheet which is a sheet-like woven fabric formed of reinforcing fibers. The fixing device according to claim 1, wherein the fixing device is configured as described above.

The reinforcing fibers include PAN-based or pitch-based carbon fibers; metal fibers such as boron fibers, titanium fibers, and steel fibers; organic fibers such as aramid, PBO (polyparaphenylene benzbisoxazole), polyamide, polyarylate, and polyester; The fixing device according to claim 4, wherein the fixing device is used alone or in a hybrid mixed with a plurality of types.

6. The resin according to claim 1, wherein the resin is a room temperature curing type or thermosetting type epoxy resin, vinyl ester resin, MMA resin, unsaturated polyester resin, or phenol resin. Fixing tool.

In a reinforcement method for reinforcing a structure by adhering an elongated reinforcing fiber sheet reinforcing material with a resin to a bonding surface of the structure,
(A) The first fixing device which is the fixing device according to any one of claims 1 to 6 is disposed at both end regions of the attachment surface of the structure, and at least the first fixing device is disposed. Bonding the first fixing reinforcing fiber sheet reinforcing material extending from the fixture to the sticking surface with a resin, and fixing the fixing body of the first fixing fixture to the structure with a fixture,
(B) A first reinforcing reinforcing fiber sheet reinforcing material is bonded to a bonding surface of the structure between the first fixing tools with a resin, and the first reinforcing reinforcing fiber sheet reinforcing material Both end joint regions are joined to the first fixing reinforcing fiber sheet reinforcing material of the first fixing tools.
A method of reinforcing a structure characterized by the above.

(C) Further, in the region between the first fixing tools, the first reinforcing reinforcing fiber sheet reinforcing material bonded in the step (b) is overlapped with the first fixing tool. The second fixing tool, which is the fixing tool according to any one of the items, is disposed, and at least the second reinforcing reinforcing fiber sheet reinforcing material extending from the second fixing tool is used as the first reinforcing reinforcing material. Laminated on the fiber sheet reinforcing material and bonded with resin, and the fixing body of the second fixing tool is fixed to the structure with a fixing tool,
(D) In the region between the second fixing devices, the second reinforcing reinforcing fiber sheet reinforcing material is laminated on the first reinforcing reinforcing fiber sheet reinforcing material, and the second reinforcing reinforcing fiber sheet reinforcing material is bonded with a resin, Both end joint regions of the second reinforcing reinforcing fiber sheet reinforcing material are joined to the second fixing reinforcing fiber sheet reinforcing material of the second fixing tools;
(E) Repeat the steps (c) and (d) as necessary.
The method of reinforcing a structure according to claim 7.

In a reinforcement method for reinforcing a structure by adhering an elongated reinforcing fiber sheet reinforcing material with a resin to a bonding surface of the structure,
(A) Adhering the first reinforcing reinforcing fiber sheet reinforcing material to the attachment surface of the structure with a resin;
(B) The first fixing tool that is the fixing tool according to any one of claims 1 to 6 is disposed at both end regions of the first reinforcing reinforcing fiber sheet reinforcing material, and at least the The first fixing reinforcing fiber sheet reinforcing material extending from the first fixing tool is laminated on both end joint regions of the first reinforcing reinforcing fiber sheet reinforcing material and bonded with resin, and the first Fix the fixing body of the fixing tool to the structure with the fixing tool.
A method of reinforcing a structure characterized by the above.

(C) Further, in the region between the first fixing devices, the second reinforcing reinforcing fiber sheet reinforcing material is laminated with the first reinforcing reinforcing fiber sheet reinforcing material, and the second reinforcing reinforcing fiber sheet reinforcing material is bonded with a resin. ,
(D) In the region between the first fixing members, the reinforcing fiber sheet reinforcing material for reinforcement that is bonded in the step (a) is overlapped with any one of claims 1 to 6. The second fixing tool, which is the fixing tool described in the above section, is disposed, and the second reinforcing reinforcing fiber sheet reinforcing material extended from the second fixing tool is used as the second reinforcing reinforcing fiber sheet reinforcing material. Are bonded to both end joint regions and bonded with resin, and the fixing body of the second fixing tool is fixed to the structure with a fixing tool,
(E) Repeat the steps (c) and (d) as necessary.
The method for reinforcing a structure according to claim 9.

The reinforcing reinforcing fiber sheet reinforcing material is at least one unidirectionally arranged reinforcing fiber sheet in which reinforcing fibers are arranged in one direction, or at least one reinforcing fiber sheet which is a sheet-like woven fabric formed of reinforcing fibers. The method of reinforcing a structure according to any one of claims 7 to 10, wherein the structure is structured as described above.

The reinforcing fibers include PAN-based or pitch-based carbon fibers; metal fibers such as boron fibers, titanium fibers, and steel fibers; organic fibers such as aramid, PBO (polyparaphenylene benzbisoxazole), polyamide, polyarylate, and polyester; The method for reinforcing a structure according to claim 11, wherein the structure is used alone or in a hybrid mixed with a plurality of types.

13. The resin according to claim 7, wherein the resin is a room temperature curable or thermosetting epoxy resin, a vinyl ester resin, an MMA resin, an unsaturated polyester resin, or a phenol resin. Method of reinforcing the structure.

8. The reinforcing fiber sheet reinforcing material is a resin non-impregnated sheet or a semi-cured prepreg sheet impregnated with a resin before being attached to the structure. The method for reinforcing a structure according to any one of items 13 to 13.

The method for reinforcing a structure according to any one of claims 7 to 14, wherein the structure is a concrete structure or a steel structure.