JP2013189798A - Reinforcing method and reinforcing structure of steel structure - Google Patents

Reinforcing method and reinforcing structure of steel structure Download PDF

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JP2013189798A
JP2013189798A JP2012056492A JP2012056492A JP2013189798A JP 2013189798 A JP2013189798 A JP 2013189798A JP 2012056492 A JP2012056492 A JP 2012056492A JP 2012056492 A JP2012056492 A JP 2012056492A JP 2013189798 A JP2013189798 A JP 2013189798A
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fiber sheet
reinforcing fiber
steel
reinforcing
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JP5942497B2 (en
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Yasuyuki Kurihara
康行 栗原
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JFE Steel Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing method and reinforcing structure of a steel structure, capable of preventing peeling of a reinforcing fiber sheet even when a huge load for peeling an end of the reinforcing fiber sheet acts from an upper part or the load repeatedly acts, and preventing destruction of a steel member even if the reinforcing fiber sheet is peeled, in the steel structure for which the reinforcing fiber sheet is bonded to a lower surface where tensile force of the steel member mounted on a column member and coupled with a pin acts.SOLUTION: In the reinforcing method of a steel structure 1 for which a reinforcing fiber sheet 3 is bonded to a lower surface where tensile force of a steel member 2 mounted on a column member 4 and coupled with a pin acts, the reinforcing fiber sheet 3 is fixed to the column member 4 by a fixing member 7.

Description

本発明は、橋梁や工場などの天井クレーン走行桁などの鋼構造物の補強方法及び補強構造に関する。   The present invention relates to a method for reinforcing a steel structure such as a bridge or a traveling girder of an overhead crane such as a factory, and a reinforcing structure.

橋梁や工場などの天井クレーン走行桁などの鋼構造物を補強する方法として、例えば、図５に示す鋼構造物の補強方法が知られている（特許文献１参照）。図５は、従来の鋼構造物の補強方法を示すもので、鋼構造物の鋼部材を、その表面上に強化繊維シートを接着することにより補強する場合の要部を示す断面図である。
図５に示す鋼構造物の補強方法においては、先ず、鋼構造物１０１における鋼部材１０２の引張力の作用する表面（下面）に、端部１０４（１０４−１，１０４−２，…，１０４−ｎ）が階段状に重なるように複数枚の強化繊維シート１０３（１０３−１，１０３−２，…，１０３−ｎ）を接着する。そして、強化繊維シート３における階段状に重なった端部１０４に対し、それを覆うカバーシート１０５を、鋼部材１０２の表面と各強化繊維シート１０３の端部１０４とに接着することにより取り付ける。 As a method of reinforcing steel structures such as bridges and overhead crane traveling girders such as factories, for example, a steel structure reinforcing method shown in FIG. 5 is known (see Patent Document 1). FIG. 5 shows a conventional method for reinforcing a steel structure, and is a cross-sectional view showing a main part when a steel member of the steel structure is reinforced by adhering a reinforcing fiber sheet on the surface thereof.
In the steel structure reinforcement method shown in FIG. 5, first, end portions 104 (104-1, 104-2,..., 104 are formed on the surface (lower surface) on which the tensile force of the steel member 102 of the steel structure 101 acts. A plurality of reinforcing fiber sheets 103 (103-1, 103-2,..., 103-n) are bonded so that -n) overlaps stepwise. And the cover sheet 105 which covers it to the edge part 104 which overlapped in the step shape in the reinforcing fiber sheet 3 is attached by adhering to the surface of the steel member 102 and the edge part 104 of each reinforcing fiber sheet 103.

このように、鋼構造物１０１における鋼部材１０２の引張力の作用する表面（下面）に、強化繊維シート１０３を接着することにより、鋼構造物１０１における鋼部材１０２の引張力の作用する表面を補強することができ、当該鋼部材１０２に作用する応力を低減することができる。これにより、疲労耐久性を向上させることができる。また、強化繊維シート１０３は、鉄製の補強部材に比べて極めて軽く、補強部材を鋼構造物に取り付ける際に、溶接を用いないので、補強部材の施工を極めて簡便にすることができる。   In this way, by bonding the reinforcing fiber sheet 103 to the surface (lower surface) on which the tensile force of the steel member 102 in the steel structure 101 is bonded, the surface on which the tensile force of the steel member 102 in the steel structure 101 is applied. It can reinforce and the stress which acts on the said steel member 102 can be reduced. Thereby, fatigue durability can be improved. Further, the reinforcing fiber sheet 103 is extremely light compared to an iron reinforcing member, and since welding is not used when attaching the reinforcing member to the steel structure, the construction of the reinforcing member can be extremely simplified.

また、鋼構造物１０１における鋼部材１０２の引張力の作用する表面に、端部１０４が階段状に重なるように複数枚の強化繊維シート１０３を接着するので、鋼構造物の荷重または変形が増加した場合に強化繊維シートが端部から剥離することを効果的に防止することができる。
更に、強化繊維シート３における階段状に重なった端部１０４に対し、それを覆うカバーシート１０５を、鋼部材１０２の表面と各強化繊維シート１０３の端部１０４とに接着することにより取り付けるので、鋼構造物の荷重または変形が一層増加した場合に強化繊維シートが端部から剥離することをより一層効果的に防止することができる。 Further, since the plurality of reinforcing fiber sheets 103 are bonded to the surface of the steel structure 101 on which the tensile force of the steel member 102 acts so that the end portions 104 overlap in a stepped manner, the load or deformation of the steel structure increases. When it does, it can prevent effectively that a reinforced fiber sheet peels from an edge part.
Furthermore, since the cover sheet 105 that covers the end portion 104 overlapped in a staircase pattern in the reinforcing fiber sheet 3 is attached to the surface of the steel member 102 and the end portion 104 of each reinforcing fiber sheet 103, When the load or deformation of the steel structure further increases, the reinforcing fiber sheet can be more effectively prevented from peeling from the end.

特開２００７−３３２６７４号公報JP 2007-332673 A

しかしながら、この図５に示す従来の鋼構造物の補強方法にあっては、次の問題点があった。
即ち、鋼構造物１０１における鋼部材１０２の引張力の作用する表面に、端部１０４が階段状に重なるように複数枚の強化繊維シート１０３を接着し、かつ端部１０４を覆うカバーシート１０５を、鋼部材１０２の表面と各強化繊維シート１０３の端部１０４とに接着することにより取り付けて強化繊維シート１０３が端部１０４から剥離することをより一層効果的に防止することができるものの、図６（ａ）に示すように、鋼部材１０２（図６（ａ）にあっては、鋼部材は、天井クレーン（図示せず）が走行クレーン走行桁であってビルトＨなどで形成されている）に上方から更に大きな荷重Ｐが作用し、更にその過大な荷重Ｐが繰り返し鋼部材１０２に作用すると、図６（ｂ）に示すように、鋼部材１０２の下面に過大な引張力が繰り返し作用し、カバーシート１０５とともに繊維強化シート１０３の端部１０４が鋼部材１０２の表面から剥離してしまうことを防止することができず、結果的に鋼部材１０２が破壊してしまうことがあった。 However, the conventional method for reinforcing a steel structure shown in FIG. 5 has the following problems.
In other words, a plurality of reinforcing fiber sheets 103 are bonded to the surface of the steel structure 101 on which the tensile force of the steel member 102 acts so that the end portions 104 overlap in a stepped manner, and the cover sheet 105 covering the end portions 104 is formed. Although it is possible to more effectively prevent the reinforcing fiber sheet 103 from being peeled off from the end portion 104 by attaching it to the surface of the steel member 102 and the end portion 104 of each reinforcing fiber sheet 103, FIG. As shown in FIG. 6 (a), the steel member 102 (in FIG. 6 (a)), the overhead crane (not shown) is a traveling crane traveling girder and is formed of a built-in H or the like. ), When a larger load P is applied from above and the excessive load P is repeatedly applied to the steel member 102, an excessive tensile force is repeatedly applied to the lower surface of the steel member 102 as shown in FIG. It is not possible to prevent the end portion 104 of the fiber reinforced sheet 103 together with the cover sheet 105 from being peeled off from the surface of the steel member 102, and as a result, the steel member 102 may be destroyed. .

なお、図６（ａ），（ｂ）において、クレーン走行桁である鋼部材１０２の両端は、１対の柱部材１０６上に載置されてピン結合されている。ここで、「ピン結合」とは、鋼部材が柱部材上に載置された状態で凹凸結合しているものをいう。凹凸結合には、一方の部材が凹形状部分を有し、他方の部材がこの凹形状部分に嵌合する凸部分を有して結合している場合や、一方の部材を他方の部材にピンやボルトで結合している場合を含む。図６（ａ），（ｂ）において、各柱部材１０６は、垂直方向に延びる形鋼で形成される柱部１０７と柱部１０７の上面に接合された平板部１０８とからなり、鋼部材１０２を構成するＨ形鋼の下部フランジの下面と平板部１０８とがピン結合している。   6A and 6B, both ends of the steel member 102, which is a crane traveling beam, are placed on a pair of column members 106 and are pin-coupled. Here, the “pin coupling” means that the steel member is concavo-convex coupled in a state where it is placed on the column member. In the concave / convex coupling, one member has a concave portion and the other member has a convex portion that fits into the concave portion, or one member is pinned to the other member. Including cases where they are connected with bolts. 6A and 6B, each column member 106 includes a column portion 107 formed of a shape steel extending in the vertical direction and a flat plate portion 108 joined to the upper surface of the column portion 107. The lower surface of the lower flange of the H-shaped steel constituting the plate and the flat plate portion 108 are pin-coupled.

従って、本発明は上述の問題点を解決するためになされたものであり、その目的は、柱部材上に載置されてピン結合された鋼部材の引張力が作用する下面に強化繊維シートを接着した鋼構造物において、強化繊維シートの端部が剥離するような過大な荷重が上方から作用しあるいは当該荷重が繰り返し作用した場合でも、強化繊維シートの剥離を防止できるとともに、仮に強化繊維シートが剥離した場合でも、鋼部材の破壊を防止することができる鋼構造物の補強方法及び補強構造を提供することにある。   Accordingly, the present invention has been made to solve the above-described problems, and the object thereof is to provide a reinforcing fiber sheet on the lower surface on which a tensile force of a steel member placed on a pillar member and pin-coupled acts. In the bonded steel structure, it is possible to prevent the separation of the reinforcing fiber sheet even if an excessive load that causes the end of the reinforcing fiber sheet to peel off acts from above or the load repeatedly acts. An object of the present invention is to provide a steel structure reinforcing method and a reinforcing structure capable of preventing the steel member from being broken even when the steel is peeled off.

上記目的を達成するために、本発明のうち請求項１に係る鋼構造物の補強方法は、柱部材上に載置されてピン結合された鋼部材の引張力が作用する下面に強化繊維シートを接着した鋼構造物の補強方法であって、前記強化繊維シートを前記柱部材に固定部材により固定することを特徴としている。
また、本発明のうち請求項２に係る鋼構造物の補強方法は、請求項１記載の鋼構造物の補強方法において、前記固定部材は、帯状の強化繊維シートで構成され、前記固定部材を前記鋼部材に接着された前記強化繊維シート及び前記柱部材に接着により固定することにより前記強化繊維シートを前記柱部材に固定することを特徴としている。 In order to achieve the above object, a steel structure reinforcing method according to claim 1 of the present invention is a reinforcing fiber sheet on a lower surface on which a tensile force of a steel member placed on a pillar member and pin-coupled acts. Is a method of reinforcing a steel structure, wherein the reinforcing fiber sheet is fixed to the column member by a fixing member.
The steel structure reinforcing method according to claim 2 of the present invention is the steel structure reinforcing method according to claim 1, wherein the fixing member is formed of a belt-shaped reinforcing fiber sheet. The reinforcing fiber sheet is fixed to the column member by fixing the reinforcing fiber sheet and the column member bonded to the steel member by adhesion.

更に、本発明のうち請求項３に係る鋼構造物の補強方法は、請求項２記載の鋼構造物の補強方法において、帯状の強化繊維シートで構成される補強部材を、前記鋼部材に接着された前記強化繊維シート及び前記固定部材と、前記鋼部材とに接着により固定することを特徴としている。
また、本発明のうち請求項４に係る鋼構造物の補強方法は、請求項１記載の鋼構造物の補強方法において、前記固定部材は、剛性のある構造体で構成され、前記固定部材を前記柱部材に溶接により固定するとともに、前記固定部材を前記鋼部材に接着された前記強化繊維シートに接着又はボルトにより固定し、これにより前記強化繊維シートを前記柱部材に固定することを特徴としている。 Further, the steel structure reinforcing method according to claim 3 of the present invention is the steel structure reinforcing method according to claim 2, wherein a reinforcing member composed of a belt-shaped reinforcing fiber sheet is bonded to the steel member. The reinforcing fiber sheet, the fixing member, and the steel member are fixed by adhesion.
A steel structure reinforcing method according to claim 4 of the present invention is the steel structure reinforcing method according to claim 1, wherein the fixing member is formed of a rigid structure, and the fixing member is The fixing member is fixed to the column member by welding, and the fixing member is fixed to the reinforcing fiber sheet bonded to the steel member with an adhesive or a bolt, thereby fixing the reinforcing fiber sheet to the column member. Yes.

更に、本発明のうち請求項５に係る鋼構造物の補強構造は、請求項１乃至４のうちいずれか一項に記載の補強方法により補強されたことを特徴としている。
ここで、請求項１において、「ピン結合」とは、鋼部材が柱部材上に載置された状態で凹凸結合しているものをいう。凹凸結合には、一方の部材が凹形状部分を有し、他方の部材がこの凹形状部分に嵌合する凸部分を有して結合している場合や、一方の部材を他方の部材にピンやボルトで結合している場合を含む意である。
また、請求項１乃至４において、「強化繊維シート」とは、炭素繊維、金属繊維、ガラス繊維、又は有機繊維等の強化繊維を布状の薄いシート状にしたものをいう。強化繊維を一方向に配列したものであっても、そうでないシート状織物であってもよい意である。 Further, the steel structure reinforcing structure according to claim 5 of the present invention is reinforced by the reinforcing method according to any one of claims 1 to 4.
Here, in claim 1, “pin coupling” means that the steel member is concavo-convex coupled in a state of being placed on the column member. In the concave / convex coupling, one member has a concave portion and the other member has a convex portion that fits into the concave portion, or one member is pinned to the other member. Including the case where it is connected with bolts.
In addition, in claims 1 to 4, the “reinforcing fiber sheet” refers to a cloth-like thin sheet formed of reinforcing fibers such as carbon fibers, metal fibers, glass fibers, or organic fibers. This means that the reinforcing fibers may be arranged in one direction or may be a sheet-like woven fabric that is not.

本発明のうち請求項１に係る鋼構造物の補強方法及び請求項５に係る鋼構造物の補強構造によれば、柱部材上に載置されてピン結合された鋼部材の引張力が作用する下面に接着した強化繊維シートを、柱部材に固定部材により固定するので、柱部材上に載置されてピン結合された鋼部材の引張力が作用する下面に強化繊維シートを接着した鋼構造物において、強化繊維シートの端部が剥離するような過大な荷重が上方から作用しあるいは当該荷重が繰り返し作用し鋼部材の下面に接着された強化繊維シートの端部が剥離しようとした場合に、柱部材に固定された固定部材から強化繊維シートに引張力が作用して強化繊維シートを拘束し、当該強化繊維シートの当該下面からの剥離を防止することができる。また、仮に、強化繊維シートが当該下面から剥離した場合でも、固定部材によって強化繊維シートを支えるため、重ね梁の効果が期待でき、鋼部材の破壊を防止することができるとともに、柱部材からの鋼部材の落下を防止することができる。   According to the steel structure reinforcing method according to claim 1 and the steel structure reinforcing structure according to claim 5 of the present invention, the tensile force of the steel member placed on the column member and pin-coupled acts. A steel structure in which a reinforcing fiber sheet is bonded to the lower surface on which the tensile force of the steel member placed on the column member and pin-bonded is fixed because the reinforcing fiber sheet bonded to the lower surface is fixed to the column member by a fixing member In an article, when an excessive load such that the end of the reinforcing fiber sheet is peeled off acts from above or the end of the reinforcing fiber sheet adhered to the lower surface of the steel member is repeatedly peeled off and the load is repeatedly applied. The tensile force acts on the reinforcing fiber sheet from the fixing member fixed to the column member to restrain the reinforcing fiber sheet, and the peeling of the reinforcing fiber sheet from the lower surface can be prevented. In addition, even if the reinforcing fiber sheet is peeled off from the lower surface, the reinforcing fiber sheet is supported by the fixing member, so that the effect of the stacked beam can be expected, the steel member can be prevented from being broken, and It is possible to prevent the steel member from falling.

また、本発明のうち請求項２に係る鋼構造物の補強方法によれば、請求項１記載の鋼構造物の補強方法において、前記固定部材は、帯状の強化繊維シートで構成され、前記固定部材を前記鋼部材に接着された前記強化繊維シート及び前記柱部材に接着により固定することにより、前記強化繊維シートを前記柱部材に固定するので、鋼部材に接着した強化繊維シートと同様の材質の強化繊維シートを固定部材として利用できるとともに、鋼部材の下面に接着された強化繊維シートを簡易な方法で柱部材に固定することができる。   Moreover, according to the steel structure reinforcing method according to claim 2 of the present invention, in the steel structure reinforcing method according to claim 1, the fixing member is formed of a belt-shaped reinforcing fiber sheet, and the fixing By fixing the reinforcing fiber sheet to the column member by bonding to the reinforcing fiber sheet and the column member bonded to the steel member, the same material as the reinforcing fiber sheet bonded to the steel member The reinforcing fiber sheet can be used as a fixing member, and the reinforcing fiber sheet bonded to the lower surface of the steel member can be fixed to the column member by a simple method.

更に、本発明のうち請求項３に係る鋼構造物の補強方法によれば、請求項２記載の鋼構造物の補強方法において、帯状の強化繊維シートで構成される補強部材を、前記鋼部材に接着された前記強化繊維シート及び前記固定部材と、前記鋼部材とに接着により固定するので、鋼部材に接着された強化繊維シートを柱部材に固定する固定部材及び強化繊維シートを更に補強部材によって鋼部材に固定できることになり、鋼構造物において、強化繊維シートの端部が剥離するような過大な荷重が上方から作用しあるいは当該荷重が繰り返し作用し鋼部材の下面に接着された強化繊維シートの端部が剥離しようとした場合に、補強部材の接着せん断力が強化繊維シートに作用して強化繊維シートを拘束し、当該強化繊維シートの前記下面からの剥離をより強固に防止することができる。また、鋼部材に接着した強化繊維シート及び固定部材７を構成する強化繊維シートと同様の材質の強化繊維シートを補強部材として利用できる   Furthermore, according to the method for reinforcing a steel structure according to claim 3 of the present invention, in the method for reinforcing a steel structure according to claim 2, the reinforcing member formed of a belt-like reinforcing fiber sheet is used as the steel member. Since the reinforcing fiber sheet and the fixing member bonded to the steel member are fixed to the steel member by bonding, the fixing member and the reinforcing fiber sheet for fixing the reinforcing fiber sheet bonded to the steel member to the column member are further reinforced. Reinforced fibers that can be fixed to the steel member by an excessive load acting on the steel structure from which the end of the reinforcing fiber sheet peels off from above or the load is repeatedly applied and adhered to the lower surface of the steel member When the end of the sheet is about to peel off, the adhesive shear force of the reinforcing member acts on the reinforcing fiber sheet to restrain the reinforcing fiber sheet, and the reinforcing fiber sheet is peeled off from the lower surface. Ri can be firmly prevented. Further, the reinforcing fiber sheet bonded to the steel member and the reinforcing fiber sheet made of the same material as the reinforcing fiber sheet constituting the fixing member 7 can be used as the reinforcing member.

また、本発明のうち請求項４に係る鋼構造物の補強方法によれば、請求項１記載の鋼構造物の補強方法において、前記固定部材は、剛性のある構造体で構成され、前記固定部材を前記柱部材に溶接により固定するとともに、前記固定部材を前記鋼部材に接着された前記強化繊維シートに接着又はボルトにより固定し、これにより前記強化繊維シートを前記柱部材に固定するので、剛性のある構造体を用いることによって請求項２で規定した固定方法よりも、強化繊維シートを柱部材により強固に固定することができる。   According to the steel structure reinforcing method according to claim 4 of the present invention, in the steel structure reinforcing method according to claim 1, the fixing member is formed of a rigid structure, and the fixing The member is fixed to the column member by welding, and the fixing member is fixed to the reinforcing fiber sheet bonded to the steel member with an adhesive or a bolt, thereby fixing the reinforcing fiber sheet to the column member. By using a rigid structure, the reinforcing fiber sheet can be more firmly fixed to the column member than the fixing method defined in claim 2.

本発明に係る鋼構造物の補強構造の第１実施形態を示し、（Ａ）は正面図、（Ｂ）は底面図である。但し、（Ｂ）においては、柱部材における柱部を省略してある。1st Embodiment of the reinforcement structure of the steel structure which concerns on this invention is shown, (A) is a front view, (B) is a bottom view. However, in (B), the column part in the column member is omitted. 図１（Ａ）における２−２線に沿う断面図である。It is sectional drawing which follows the 2-2 line in FIG. 図１示す鋼構造物の補強構造において、鋼部材に上方から強化繊維シートの端部が剥離するような過大な荷重が上方から作用し、更にその過大な荷重が繰り返し鋼部材に作用した場合の説明図である。In the steel structure reinforcement structure shown in FIG. 1, an excessive load acts on the steel member from above so that the end of the reinforcing fiber sheet peels from above, and the excessive load repeatedly acts on the steel member. It is explanatory drawing. 本発明に係る鋼構造物の補強構造の第２実施形態を示し、（Ａ）は正面図、（Ｂ）は（Ａ）における４Ｂ−４Ｂ線に沿う断面図である。2nd Embodiment of the reinforcement structure of the steel structure which concerns on this invention is shown, (A) is a front view, (B) is sectional drawing which follows the 4B-4B line in (A). 従来の鋼構造物の補強方法を示すもので、鋼構造物の鋼部材を、その表面上に炭素繊維シートを接着することにより補強する場合の要部を示す断面図である。The conventional steel structure reinforcement method is shown, It is sectional drawing which shows the principal part in the case of reinforcing the steel member of a steel structure by adhere | attaching a carbon fiber sheet on the surface. 図５に示す従来の鋼構造物の補強方法において、鋼部材に上方から過大な荷重が作用し、更にその過大な荷重が繰り返し鋼部材に作用した場合の説明図である。In the conventional steel structure reinforcement method shown in FIG. 5, it is explanatory drawing when an excessive load acts on a steel member from the upper part, and also the excessive load acts on a steel member repeatedly.

以下、本発明の実施の形態を図面を参照して説明する。図１は、本発明に係る鋼構造物の補強構造の第１実施形態を示し、（Ａ）は正面図、（Ｂ）は底面図である。但し、（Ｂ）においては、柱部材における柱部を省略してある。図２は、図１（Ａ）における２−２線に沿う断面図である。
図１に示す鋼構造物１は、工場における天井クレーン走行桁に適用されるもので、クレーン走行桁である鋼部材２の長手方向（図１（Ａ）における左右方向）の両端が、１対の柱部材４上に載置されてピン結合されている。ここで、「ピン結合」とは、鋼部材２が柱部材４上に載置された状態で凹凸結合しているものをいう。凹凸結合には、一方の部材が凹形状部分を有し、他方の部材がこの凹形状部分に嵌合する凸部分を有して結合している場合や、一方の部材を他方の部材にピンやボルトで結合している場合を含む。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1: shows 1st Embodiment of the reinforcement structure of the steel structure based on this invention, (A) is a front view, (B) is a bottom view. However, in (B), the column part in the column member is omitted. FIG. 2 is a cross-sectional view taken along line 2-2 in FIG.
A steel structure 1 shown in FIG. 1 is applied to an overhead crane traveling girder in a factory, and a pair of ends of a steel member 2 that is a crane traveling girder in the longitudinal direction (left-right direction in FIG. 1A) is a pair. It is mounted on the column member 4 and is pin-coupled. Here, “pin coupling” means that the steel member 2 is concavo-convex coupled in a state of being placed on the column member 4. In the concave / convex coupling, one member has a concave portion and the other member has a convex portion that fits into the concave portion, or one member is pinned to the other member. Including cases where they are connected with bolts.

各柱部材４は、垂直方向に延びる形鋼で形成される柱部５と柱部５の上面に接合された平板部６とからなる。平板部６は、矩形状の板部材で、その主面を構成する下面が柱部５の上面に接合されている。
鋼部材２は、Ｈ形鋼で形成されるクレーン走行桁であって、垂直方向に延びるウェブ２ａと、ウェブ２ａの上下両端に設けられた一対の上側フランジ２ｂ及び下側フランジ２ｃとからなる。そして、下側フランジ２ｃの両端が各柱部材４の平板部６上に載置され、下側フランジ２ｃと平板部６とがピン結合されている。そして、天井クレーン（図示せず）の荷重が上方から鋼部材２の上側フランジ２ｂに下方に向けて作用するようになっている。鋼部材２に対し、上方から荷重が作用すると、鋼部材２を構成するＨ形鋼が長手方向の略中央部が下側凸となるように変形し、上側フランジ２ｂの上面に圧縮力が作用し、下側フランジ２ｃの下面に引張力が作用することになる。 Each column member 4 includes a column portion 5 formed of a shape steel extending in the vertical direction and a flat plate portion 6 joined to the upper surface of the column portion 5. The flat plate portion 6 is a rectangular plate member, and the lower surface constituting the main surface thereof is joined to the upper surface of the column portion 5.
The steel member 2 is a crane traveling girder formed of H-shaped steel, and includes a web 2a extending in the vertical direction and a pair of upper flange 2b and lower flange 2c provided at both upper and lower ends of the web 2a. Both ends of the lower flange 2c are placed on the flat plate portion 6 of each column member 4, and the lower flange 2c and the flat plate portion 6 are pin-coupled. And the load of an overhead crane (not shown) acts downward on the upper flange 2b of the steel member 2 from above. When a load acts on the steel member 2 from above, the H-shaped steel constituting the steel member 2 is deformed so that the substantially central portion in the longitudinal direction is convex downward, and a compressive force acts on the upper surface of the upper flange 2b. Then, a tensile force acts on the lower surface of the lower flange 2c.

そして、鋼部材２を構成するＨ形鋼の引張力が作用する下側フランジ２ｃの下面には、１対の柱部材４間における当該下面のほぼ全域を覆うように強化繊維シート３が接着により固定されている。強化繊維シート３は、複数枚（本実施形態にあっては２枚）の強化繊維シート３ａ，３ｂからなり、これら複数枚の強化繊維シート３ａ，３ｂが、鋼部材２を構成するＨ形鋼の引張力が作用する下側フランジ２ｃの下面に重ねて接着されている。各強化繊維シート３ａ，３ｂは、炭素繊維、金属繊維、ガラス繊維、又は有機繊維等の強化繊維を布状の薄いシート状にしたものをいい、強化繊維を一方向に配列したものであっても、そうでないシート状織物であってもよい。   The reinforcing fiber sheet 3 is bonded to the lower surface of the lower flange 2c on which the tensile force of the H-shaped steel constituting the steel member 2 acts so as to cover almost the entire area of the lower surface between the pair of column members 4. It is fixed. The reinforcing fiber sheet 3 includes a plurality (two in the present embodiment) of reinforcing fiber sheets 3 a and 3 b, and the plurality of reinforcing fiber sheets 3 a and 3 b constitute the H-shaped steel constituting the steel member 2. Are attached to the lower surface of the lower flange 2c on which the tensile force acts. Each of the reinforcing fiber sheets 3a and 3b is a fiber-like thin sheet-like reinforcing fiber such as carbon fiber, metal fiber, glass fiber, or organic fiber, and the reinforcing fibers are arranged in one direction. However, it may be a sheet-like woven fabric that is not so.

ここで、強化繊維シート３を、鋼部材２を構成するＨ形鋼の引張力が作用する下側フランジ２ｃの下面に接着することにより、鋼部材２の引張力の作用する下面を補強することができ、当該鋼部材２に作用する応力を低減することができる。これにより、疲労耐久性を向上させることができる。また、強化繊維シート３は、鉄製の補強部材に比べて極めて軽く、補強部材を鋼構造物に取り付ける際に、溶接を用いないので、補強部材の施工を極めて簡便にすることができる。   Here, the lower surface of the steel member 2 on which the tensile force acts is reinforced by adhering the reinforcing fiber sheet 3 to the lower surface of the lower flange 2c on which the tensile force of the H-shaped steel constituting the steel member 2 acts. The stress acting on the steel member 2 can be reduced. Thereby, fatigue durability can be improved. Further, the reinforcing fiber sheet 3 is extremely light compared to an iron reinforcing member, and since welding is not used when attaching the reinforcing member to the steel structure, the construction of the reinforcing member can be extremely simplified.

そして、強化繊維シート３は、図１（Ａ），（Ｂ）に示すように、強化繊維シート３の長手方向両端において、１対の固定部材７により、１対の柱部材４の平板部６に固定されている。このため、図３に示すように、１対の柱部材４上に載置されてピン結合された鋼部材２の引張力が作用する下側フランジ２ｃの下面に強化繊維シート３を接着した鋼構造物１において、強化繊維シート３の長手方向両端部が剥離するような過大な荷重Ｐが上方から作用しあるいは当該荷重Ｐが繰り返し作用し鋼部材２の下面に接着された強化繊維シート３の長手方向両端部が剥離しようとした場合に、各柱部材４に固定された各固定部材７から強化繊維シート３に引張力Ｆ１が作用して強化繊維シート３を拘束し、当該強化繊維シート３の、鋼部材２の下面からの剥離を防止することができる。また、仮に、強化繊維シート３が当該下面から剥離した場合でも、各固定部材７によって強化繊維シート３を支えるため、重ね梁の効果が期待でき、鋼部材２の破壊を防止することができるとともに、各柱部材４からの鋼部材２の落下を防止することができる。   And as shown in FIG. 1 (A), (B), the reinforcing fiber sheet 3 is a flat plate portion 6 of a pair of column members 4 by a pair of fixing members 7 at both ends in the longitudinal direction of the reinforcing fiber sheet 3. It is fixed to. For this reason, as shown in FIG. 3, the steel in which the reinforcing fiber sheet 3 is bonded to the lower surface of the lower flange 2 c on which the tensile force of the steel member 2 placed on the pair of column members 4 and pin-coupled acts. In the structure 1, an excessive load P that peels off both ends of the reinforcing fiber sheet 3 in the longitudinal direction acts from above or the load P repeatedly acts and is bonded to the lower surface of the steel member 2. When both ends in the longitudinal direction are about to be peeled off, the tensile force F1 acts on the reinforcing fiber sheet 3 from each fixing member 7 fixed to each column member 4 to restrain the reinforcing fiber sheet 3, and the reinforcing fiber sheet 3 The peeling from the lower surface of the steel member 2 can be prevented. In addition, even if the reinforcing fiber sheet 3 is peeled off from the lower surface, the reinforcing fiber sheet 3 is supported by the fixing members 7, so that the effect of the stacked beams can be expected and the steel member 2 can be prevented from being broken. The steel member 2 can be prevented from dropping from each column member 4.

ここで、各固定部材７は、帯状の強化繊維シートで構成される。そして、各固定部材７を、鋼部材２に接着された強化繊維シート３及び各柱部材４に接着により固定することにより強化繊維シート３を各柱部材４に固定する。各固定部材７をよる強化繊維シート３の具体的な固定方法については、後に詳述する。
また、鋼部材２に接着された強化繊維シート３の長手方向両端部及び１対の固定部材７は、帯状の強化繊維シートで構成される１対の補強部材８により鋼部材２に固定される。各補強部材８を、鋼部材２に接着された強化繊維シート３及び各固定部材７と、鋼部材２とに接着により固定する。各補強部材８を用いた強化繊維シート３及び各固定部材７の具体的な固定方法は、後に詳述する。 Here, each fixing member 7 is configured by a belt-like reinforcing fiber sheet. Then, the reinforcing fiber sheet 3 is fixed to each column member 4 by fixing each fixing member 7 to the reinforcing fiber sheet 3 and each column member 4 bonded to the steel member 2 by adhesion. A specific fixing method of the reinforcing fiber sheet 3 using the fixing members 7 will be described in detail later.
Moreover, the longitudinal direction both ends of the reinforcing fiber sheet 3 bonded to the steel member 2 and the pair of fixing members 7 are fixed to the steel member 2 by a pair of reinforcing members 8 formed of a belt-like reinforcing fiber sheet. . Each reinforcing member 8 is fixed to the reinforcing fiber sheet 3 and each fixing member 7 bonded to the steel member 2 and the steel member 2 by bonding. A specific fixing method of the reinforcing fiber sheet 3 and the fixing members 7 using the reinforcing members 8 will be described in detail later.

これにより、鋼部材２に接着された強化繊維シート３を１対の柱部材４に固定する１対の固定部材７及び強化繊維シート３を更に１対の補強部材８によって鋼部材２に固定できることになり、鋼構造物１において、図３に示すように、強化繊維シート３の端部が剥離するような過大な荷重Ｐが上方から作用しあるいは当該荷重Ｐが繰り返し作用し鋼部材２の下面に接着された強化繊維シート３の長手両端部が剥離しようとした場合に、各補強部材８の接着せん断力Ｆ２が強化繊維シート３に作用して強化繊維シート３を拘束し、当該強化繊維シート３の当該下面からの剥離をより強固に防止することができる。   Accordingly, the pair of fixing members 7 for fixing the reinforcing fiber sheet 3 bonded to the steel member 2 to the pair of column members 4 and the reinforcing fiber sheet 3 can be further fixed to the steel member 2 by the pair of reinforcing members 8. In the steel structure 1, as shown in FIG. 3, an excessive load P that causes the end of the reinforcing fiber sheet 3 to peel off acts from above or the load P repeatedly acts to lower the bottom surface of the steel member 2. When the longitudinal end portions of the reinforcing fiber sheet 3 bonded to each other are to be peeled off, the adhesive shear force F2 of each reinforcing member 8 acts on the reinforcing fiber sheet 3 to restrain the reinforcing fiber sheet 3, and the reinforcing fiber sheet 3 can be more securely prevented from peeling from the lower surface.

次に、鋼構造物１の補強方法について、手順を追って説明する。
先ず、図１において、鋼部材２を構成するＨ形鋼の下側フランジ２ｃの下面に、強化繊維シート３を接着により固定する。この固定に際しては、先ず、当該下面に、エポキシ樹脂やアクリル樹脂等を成分とする樹脂接着剤を塗布し、当該樹脂接着剤が固化しないうちに、１層目の強化繊維シート３ａを樹脂接着剤が塗布された下側フランジ２ｃの下面に重ねる。次いで、強化繊維シート３ａの上（下面）にさらに同様の樹脂接着剤を塗布し、２層目の強化繊維シート３ｂを樹脂接着剤が塗布された強化繊維シート３ａの上（下面）に重ねる。そして、樹脂接着剤を固化させる。これにより、鋼部材２を構成するＨ形鋼の下側フランジ２ｃの下面に、強化繊維シート３が固定される。 Next, a method for reinforcing the steel structure 1 will be described step by step.
First, in FIG. 1, the reinforcing fiber sheet 3 is fixed to the lower surface of the lower flange 2c of the H-shaped steel constituting the steel member 2 by adhesion. When fixing, first, a resin adhesive containing epoxy resin, acrylic resin, or the like as a component is applied to the lower surface, and the first reinforcing fiber sheet 3a is bonded to the resin adhesive before the resin adhesive solidifies. Is applied to the lower surface of the lower flange 2c. Next, the same resin adhesive is further applied on the reinforcing fiber sheet 3a (lower surface), and the second-layer reinforcing fiber sheet 3b is stacked on the reinforcing fiber sheet 3a to which the resin adhesive is applied (lower surface). Then, the resin adhesive is solidified. Thereby, the reinforcing fiber sheet 3 is fixed to the lower surface of the lower flange 2c of the H-shaped steel constituting the steel member 2.

次いで、帯状の強化繊維シートで構成される１対の固定部材７を用いて、強化繊維シート３を１対の柱部材４の平板部６に固定する。具体的には、図１（Ａ），（Ｂ）に示すように、各固定部材７の一端の内側面を強化繊維シート３の一側面に接着剤により接着固定し、固定部材７を引っ張りつつ平板部６の外周を巻くようにして固定部材７の内側面を平板部の外周面に接着し、固定部材７の他端を強化繊維シート３の他側面に接着剤により接着固定する。これにより、強化繊維シート３は１対の柱部材４の平板部６に固定される。   Next, the reinforcing fiber sheet 3 is fixed to the flat plate portion 6 of the pair of column members 4 using a pair of fixing members 7 formed of a belt-shaped reinforcing fiber sheet. Specifically, as shown in FIGS. 1A and 1B, the inner surface of one end of each fixing member 7 is bonded and fixed to one side surface of the reinforcing fiber sheet 3 with an adhesive, and the fixing member 7 is pulled. The inner surface of the fixing member 7 is bonded to the outer peripheral surface of the flat plate portion so that the outer periphery of the flat plate portion 6 is wound, and the other end of the fixing member 7 is bonded and fixed to the other side surface of the reinforcing fiber sheet 3 with an adhesive. Thereby, the reinforcing fiber sheet 3 is fixed to the flat plate portion 6 of the pair of column members 4.

そして、最後に、帯状の強化繊維シートで構成される１対の補強部材８を用いて、強化繊維シート３及び固定部材７を更に鋼部材２に固定する。具体的には、図１（Ａ）,（Ｂ）及び図２に示すように、各補強部材８の一端の内側面を鋼部材２の下側フランジ２ｃの一方側上面に接着剤により接着固定し、補強部材８を引っ張りつつ下側フランジ２ｃの一側面、固定部材７の外側面及び強化繊維シート３の一側面、強化繊維シート３の下面、固定部材７の外側面及び強化繊維シート３の他側面の順に補強部材８の内側面を接着し、補強部材８の他端の内側面を鋼部材２の下側フランジ２ｃの他方側上面に接着剤により接着固定する。これにより、強化繊維シート３及び１対の固定部材７は、鋼部材２に固定される。   Finally, the reinforcing fiber sheet 3 and the fixing member 7 are further fixed to the steel member 2 by using a pair of reinforcing members 8 formed of a belt-shaped reinforcing fiber sheet. Specifically, as shown in FIGS. 1A, 1B, and 2, the inner surface of one end of each reinforcing member 8 is bonded and fixed to the upper surface of one side of the lower flange 2c of the steel member 2 with an adhesive. Then, while pulling the reinforcing member 8, one side surface of the lower flange 2 c, the outer surface of the fixing member 7 and one side surface of the reinforcing fiber sheet 3, the lower surface of the reinforcing fiber sheet 3, the outer surface of the fixing member 7, and the reinforcing fiber sheet 3 The inner surface of the reinforcing member 8 is bonded in the order of the other surface, and the inner surface of the other end of the reinforcing member 8 is bonded and fixed to the upper surface of the other side of the lower flange 2c of the steel member 2 with an adhesive. Thereby, the reinforcing fiber sheet 3 and the pair of fixing members 7 are fixed to the steel member 2.

このように、１対の柱部材４上に載置されてピン結合された鋼部材２の引張力が作用する下面に接着した強化繊維シート３を、１対の柱部材４に１対の固定部材７により固定する。これにより、前述したように、１対の柱部材４上に載置されてピン結合された鋼部材２の引張力が作用する下面に強化繊維シート３を接着した鋼構造物１において、強化繊維シート３の端部が剥離するような過大な荷重Ｐが上方から作用しあるいは当該荷重Ｐが繰り返し作用し鋼部材２の下面に接着された強化繊維シート３の長手方向両端部が剥離しようとした場合に、各柱部材４に固定された各固定部材７から強化繊維シート３に引張力Ｆ１が作用して強化繊維シート３を拘束し、当該強化繊維シート３の当該下面からの剥離を防止することができる。また、仮に、強化繊維シート３が当該下面から剥離した場合でも、各固定部材７によって強化繊維シート３を支えるため、重ね梁の効果が期待でき、鋼部材２の破壊を防止することができるとともに、各柱部材４からの鋼部材２の落下を防止することができる。   In this manner, the reinforcing fiber sheet 3 bonded to the lower surface on which the tensile force of the steel member 2 placed on the pair of column members 4 and pin-coupled is applied is fixed to the pair of column members 4 as a pair. It is fixed by the member 7. Thus, as described above, in the steel structure 1 in which the reinforcing fiber sheet 3 is bonded to the lower surface on which the tensile force of the steel member 2 placed on the pair of column members 4 and pin-coupled acts, the reinforcing fiber An excessive load P such that the end of the sheet 3 is peeled off acts from above or the load P is repeatedly acted and both longitudinal ends of the reinforcing fiber sheet 3 bonded to the lower surface of the steel member 2 are about to peel off. In this case, the tensile force F1 acts on the reinforcing fiber sheet 3 from each fixing member 7 fixed to each column member 4 to restrain the reinforcing fiber sheet 3 and prevent the peeling of the reinforcing fiber sheet 3 from the lower surface. be able to. In addition, even if the reinforcing fiber sheet 3 is peeled off from the lower surface, the reinforcing fiber sheet 3 is supported by the fixing members 7, so that the effect of the stacked beams can be expected and the steel member 2 can be prevented from being broken. The steel member 2 can be prevented from dropping from each column member 4.

また、各固定部材７は、帯状の強化繊維シートで構成され、各固定部材７を鋼部材２に接着された強化繊維シート３及び各柱部材４に接着により固定することにより、強化繊維シート３を１対の柱部材４に固定するので、鋼部材２に接着した強化繊維シート３と同様の材質の強化繊維シートを固定部材７として利用できるとともに、鋼部材２の下面に接着された強化繊維シートを簡易な方法で柱部材４に固定することができる。   Each fixing member 7 is composed of a belt-shaped reinforcing fiber sheet, and the fixing fiber sheet 3 is fixed to the reinforcing fiber sheet 3 bonded to the steel member 2 and each column member 4 by bonding. Is fixed to the pair of column members 4, the reinforcing fiber sheet made of the same material as the reinforcing fiber sheet 3 bonded to the steel member 2 can be used as the fixing member 7, and the reinforcing fiber bonded to the lower surface of the steel member 2. The sheet can be fixed to the column member 4 by a simple method.

更に、帯状の強化繊維シートで構成される１対の補強部材８を、鋼部材２に接着された強化繊維シート３及び１対の固定部材７と、鋼部材２とに接着により固定するので、前述したように、鋼部材２に接着された強化繊維シート３を１対の柱部材４に固定する１対の固定部材７及び強化繊維シート３を更に１対の補強部材８によって鋼部材２に固定できることになり、鋼構造物１において、強化繊維シート３の端部が剥離するような過大な荷重Ｐが上方から作用しあるいは当該荷重Ｐが繰り返し作用し鋼部材２の下面に接着された強化繊維シート３の長手方向両端部が剥離しようとした場合に、各補強部材８の接着せん断力Ｆ２が強化繊維シート３に作用して強化繊維シート３を拘束し、当該強化繊維シート３の前記下面からの剥離をより強固に防止することができる。また、鋼部材２に接着した強化繊維シート３及び固定部材７を構成する強化繊維シートと同様の材質の強化繊維シートを補強部材８として利用できる。   Further, since the pair of reinforcing members 8 formed of the belt-shaped reinforcing fiber sheet is fixed to the reinforcing fiber sheet 3 and the pair of fixing members 7 bonded to the steel member 2 and the steel member 2 by bonding, As described above, the pair of fixing members 7 for fixing the reinforcing fiber sheet 3 bonded to the steel member 2 to the pair of column members 4 and the reinforcing fiber sheet 3 are further joined to the steel member 2 by the pair of reinforcing members 8. In the steel structure 1, an excessive load P that peels off the end of the reinforcing fiber sheet 3 acts from above or the load P is repeatedly acted and bonded to the lower surface of the steel member 2. When both longitudinal ends of the fiber sheet 3 are about to peel, the adhesive shear force F2 of each reinforcing member 8 acts on the reinforcing fiber sheet 3 to restrain the reinforcing fiber sheet 3, and the lower surface of the reinforcing fiber sheet 3 Stronger peeling from It is possible to prevent the. Further, a reinforcing fiber sheet made of the same material as the reinforcing fiber sheet constituting the reinforcing fiber sheet 3 and the fixing member 7 bonded to the steel member 2 can be used as the reinforcing member 8.

次に、本発明に係る鋼構造物の補強構造の第２実施形態を説明する。図４は、本発明に係る鋼構造物の補強構造の第２実施形態を示し、（Ａ）は正面図、（Ｂ）は（Ａ）における４Ｂ−４Ｂ線に沿う断面図である。図４（Ａ），（Ｂ）において、図１（Ａ），（Ｂ）及び図２に示す部材と同一の部材については同一の符号を付し、その説明は省略することがある。   Next, a second embodiment of the steel structure reinforcement structure according to the present invention will be described. FIG. 4: shows 2nd Embodiment of the reinforcement structure of the steel structure based on this invention, (A) is a front view, (B) is sectional drawing which follows the 4B-4B line in (A). 4A and 4B, the same members as those shown in FIGS. 1A and 1B and FIG. 2 are denoted by the same reference numerals, and the description thereof may be omitted.

図４（Ａ），（Ｂ）に示す鋼構造物１の補強構造は、図１（Ａ），（Ｂ）及び図２に示す補強構造と基本構成は同様であるが、固定部材の構成が異なっている。
即ち、図１（Ａ），（Ｂ）及び図２に示す補強構造においては、各固定部材７が、帯状の強化繊維シートで構成され、各固定部材７を、鋼部材２に接着された強化繊維シート３及び各柱部材４に接着により固定することにより強化繊維シート３を各柱部材４に固定する。これに対して、図４（Ａ）,（Ｂ）に示す補強構造においては、各固定部材９は、剛性のある構造体で構成されている。具体的に述べると、各固定部材９は、矩形形状の鋼製の平板部９ａと、平板部９ａの下面であって幅方向両端に設けられた三角形状の１対の鋼製のリブ９ｂとから構成されている。各リブ９ｂの上下方向に延びる側面が平板部９ａの一側面と面一になるように各リブ９ｂが平板部９ａに接合されている。そして、各固定部材９を構成する平板部９ａの前記一側面及び各リブ９ｂの前記側面が、柱部材４の柱部５に溶接により固定される。また、固定部材９を構成する平板部９ａの上面が接着又はボルトにより強化繊維シート３に固定される。これにより、強化繊維シート３は柱部材４に固定される。 The reinforcing structure of the steel structure 1 shown in FIGS. 4 (A) and 4 (B) has the same basic structure as the reinforcing structure shown in FIGS. 1 (A), 1 (B) and 2, but the structure of the fixing member is the same. Is different.
That is, in the reinforcing structure shown in FIGS. 1A, 1B, and 2, each fixing member 7 is composed of a belt-like reinforcing fiber sheet, and each fixing member 7 is reinforced by being bonded to the steel member 2. The reinforcing fiber sheet 3 is fixed to each column member 4 by fixing to the fiber sheet 3 and each column member 4 by adhesion. On the other hand, in the reinforcing structure shown in FIGS. 4A and 4B, each fixing member 9 is formed of a rigid structure. More specifically, each fixing member 9 includes a rectangular steel flat plate portion 9a, and a pair of triangular steel ribs 9b provided at both ends in the width direction on the lower surface of the flat plate portion 9a. It is composed of Each rib 9b is joined to the flat plate portion 9a so that a side surface extending in the vertical direction of each rib 9b is flush with one side surface of the flat plate portion 9a. Then, the one side surface of the flat plate portion 9a constituting each fixing member 9 and the side surface of each rib 9b are fixed to the column portion 5 of the column member 4 by welding. Further, the upper surface of the flat plate portion 9a constituting the fixing member 9 is fixed to the reinforcing fiber sheet 3 by adhesion or bolts. Thereby, the reinforcing fiber sheet 3 is fixed to the column member 4.

そして、鋼構造物１の補強方法について、手順を追って説明すると、先ず、図４（Ａ），（Ｂ）において、図１（Ａ）,(Ｂ)に示す場合と同様に、鋼部材２を構成するＨ形鋼の下側フランジ２ｃの下面に、強化繊維シート３を接着により固定する。強化繊維シート３を前記下面に固定する手順は、前述と同様である。
次いで、各固定部材９を構成する平板部９ａの一側面及び各リブ９ｂの側面を、柱部材４の柱部５に溶接により固定する。また、固定部材９を構成する平板部９ａの上面を接着又はボルトにより強化繊維シート３に固定する。これにより、強化繊維シート３は柱部材４に固定される。
この鋼構造物１の補強方法によれば、固定部材９として剛性のある構造体を用いることによって、図１（Ａ）,(Ｂ)及び図２で説明した固定方法よりも、強化繊維シート３を柱部材４により強固に固定することができる。
以上、本発明の実施形態について説明してきたが、本発明はこれに限定されずに種々の変更、改良を行うことができる。 Then, the reinforcing method of the steel structure 1 will be described step by step. First, in FIGS. 4 (A) and 4 (B), the steel member 2 is formed as in the case shown in FIGS. 1 (A) and 1 (B). The reinforcing fiber sheet 3 is fixed to the lower surface of the lower flange 2c of the H-shaped steel to be formed by adhesion. The procedure for fixing the reinforcing fiber sheet 3 to the lower surface is the same as described above.
Next, one side surface of the flat plate portion 9 a and each side surface of each rib 9 b constituting each fixing member 9 are fixed to the column portion 5 of the column member 4 by welding. Further, the upper surface of the flat plate portion 9a constituting the fixing member 9 is fixed to the reinforcing fiber sheet 3 by bonding or bolts. Thereby, the reinforcing fiber sheet 3 is fixed to the column member 4.
According to the reinforcing method of the steel structure 1, the reinforcing fiber sheet 3 is used by using a rigid structure as the fixing member 9, rather than the fixing method described in FIGS. 1 (A), (B) and FIG. 2. Can be firmly fixed by the column member 4.
As mentioned above, although embodiment of this invention has been described, this invention is not limited to this, A various change and improvement can be performed.

例えば、鋼構造物１として天井クレーンの走行桁を例に説明したが、鋼構造物１は、柱部材上に鋼部材が載置されてピン結合され、鋼部材に上方から荷重が作用し鋼部材の下面に引張力が作用する構造のものであれば、天井クレーンの走行桁に限られるものではない。また、鋼部材２が、Ｈ形鋼で構成されている例を説明したが、Ｈ形鋼で構成されるものに限らず、上方から荷重が作用した際に下面に引張力が作用する構造のものであればよい。
また、鋼部材２の下面に接着される強化繊維シート３は、２枚の強化繊維シート３ａ，３ｂで構成されているが、１枚でも２枚より多くてもよい。 For example, although the traveling girder of the overhead crane has been described as an example of the steel structure 1, the steel structure 1 has a steel member placed on a pillar member and pin-coupled, and a load is applied to the steel member from above and the steel structure 1 is steel. As long as it has a structure in which a tensile force acts on the lower surface of the member, it is not limited to a traveling girder of an overhead crane. Moreover, although the steel member 2 demonstrated the example comprised by H-section steel, it is not restricted to what is comprised by H-section steel, When a load acts from upper direction, the structure where a tensile force acts on a lower surface Anything is acceptable.
Further, the reinforcing fiber sheet 3 bonded to the lower surface of the steel member 2 is composed of two reinforcing fiber sheets 3a and 3b, but may be one or more than two.

また、固定部材は、強化繊維シート３を柱部材４に固定するものであればよく、帯状の強化繊維シートで構成されて鋼部材２に接着された強化繊維シート３及び柱部材４に接着により固定したり、あるいは、剛性のある構造体で構成された固定部材を柱部材４に溶接により固定するとともに、固定部材を鋼部材２に接着された強化繊維シート３に接着又はボルトにより固定するものに限られない。
また、剛性のある構造体で固定部材９を構成した場合、その形状は、平板部９ａと平板部９ａに接合される１対のリブ９ｂで形成される必要はなく、また、材質は鋼製でなくてもよい。
更に、帯状の強化繊維シートで構成される補強部材８を、必ずしも用いなくても良い。 The fixing member only needs to fix the reinforcing fiber sheet 3 to the column member 4. The fixing member is bonded to the reinforcing fiber sheet 3 and the column member 4 which are formed of a band-like reinforcing fiber sheet and bonded to the steel member 2. Fixing or fixing a fixing member composed of a rigid structure to the column member 4 by welding, and fixing the fixing member to the reinforcing fiber sheet 3 bonded to the steel member 2 by bonding or bolts Not limited to.
Further, when the fixing member 9 is constituted by a rigid structure, the shape thereof does not need to be formed by the flat plate portion 9a and the pair of ribs 9b joined to the flat plate portion 9a, and the material is made of steel. Not necessarily.
Furthermore, the reinforcing member 8 composed of a belt-shaped reinforcing fiber sheet is not necessarily used.

１ 鋼構造物
２ 鋼部材
２ａ ウェブ
２ｂ 上側フランジ
２ｃ 下側フランジ
３，３ａ，３ｂ 強化繊維シート
４ 柱部材
５ 柱部
６ 平板部
７ 固定部材
８ 補強部材
９ 固定部材
９ａ 平板部
９ｂ リブ
１０１ 鋼構造物
１０２ 鋼構造物
１０３ 強化繊維シート
１０４ 端部
１０５ カバーシート
１０６ 柱部材
１０７ 柱部
１０８ 平板部 DESCRIPTION OF SYMBOLS 1 Steel structure 2 Steel member 2a Web 2b Upper flange 2c Lower flange 3, 3a, 3b Reinforcing fiber sheet 4 Column member 5 Column 6 Flat plate portion 7 Fixing member 8 Reinforcement member 9 Fixing member 9a Flat plate portion 9b Rib 101 Steel structure Material 102 Steel structure 103 Reinforcing fiber sheet 104 End portion 105 Cover sheet 106 Column member 107 Column portion 108 Flat plate portion

Claims (5)

柱部材上に載置されてピン結合された鋼部材の引張力が作用する下面に強化繊維シートを接着した鋼構造物の補強方法であって、
前記強化繊維シートを前記柱部材に固定部材により固定することを特徴とする鋼構造物の補強方法。 A steel structure reinforcing method in which a reinforcing fiber sheet is bonded to a lower surface on which a tensile force of a steel member placed on a pillar member and pin-coupled acts,
A method for reinforcing a steel structure, wherein the reinforcing fiber sheet is fixed to the column member by a fixing member. 前記固定部材は、帯状の強化繊維シートで構成され、前記固定部材を前記鋼部材に接着された前記強化繊維シート及び前記柱部材に接着により固定することにより前記強化繊維シートを前記柱部材に固定することを特徴とする請求項１記載の鋼構造物の補強方法。   The fixing member is composed of a belt-shaped reinforcing fiber sheet, and the fixing member is fixed to the column member by fixing the fixing member to the reinforcing fiber sheet and the column member bonded to the steel member. The method for reinforcing a steel structure according to claim 1, wherein: 帯状の強化繊維シートで構成される補強部材を、前記鋼部材に接着された前記強化繊維シート及び前記固定部材と、前記鋼部材とに接着により固定することを特徴とする請求項２記載の鋼構造物の補強方法。   3. The steel according to claim 2, wherein a reinforcing member composed of a belt-shaped reinforcing fiber sheet is fixed to the reinforcing fiber sheet and the fixing member bonded to the steel member and the steel member by bonding. How to reinforce a structure. 前記固定部材は、剛性のある構造体で構成され、前記固定部材を前記柱部材に溶接により固定するとともに、前記固定部材を前記鋼部材に接着された前記強化繊維シートに接着又はボルトにより固定し、これにより前記強化繊維シートを前記柱部材に固定することを特徴とする請求項１記載の鋼構造物の補強方法。   The fixing member is composed of a rigid structure, and the fixing member is fixed to the column member by welding, and the fixing member is fixed to the reinforcing fiber sheet bonded to the steel member by bonding or bolts. Then, the reinforcing fiber sheet is fixed to the column member, thereby reinforcing the steel structure according to claim 1. 請求項１乃至４のうちいずれか一項に記載の補強方法により補強されたことを特徴と鋼構造物の補強構造。   Reinforced by the reinforcing method according to any one of claims 1 to 4, and a steel structure reinforcing structure.
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