JP4068033B2 - Steel structure reinforcement method - Google Patents
Steel structure reinforcement method Download PDFInfo
- Publication number
- JP4068033B2 JP4068033B2 JP2003308357A JP2003308357A JP4068033B2 JP 4068033 B2 JP4068033 B2 JP 4068033B2 JP 2003308357 A JP2003308357 A JP 2003308357A JP 2003308357 A JP2003308357 A JP 2003308357A JP 4068033 B2 JP4068033 B2 JP 4068033B2
- Authority
- JP
- Japan
- Prior art keywords
- steel structure
- fiber sheet
- reinforcing
- steel
- thermosetting resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 88
- 239000010959 steel Substances 0.000 title claims description 88
- 238000000034 method Methods 0.000 title claims description 16
- 230000002787 reinforcement Effects 0.000 title description 15
- 239000000835 fiber Substances 0.000 claims description 49
- 230000003014 reinforcing effect Effects 0.000 claims description 37
- 239000002184 metal Substances 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 32
- 229920005989 resin Polymers 0.000 claims description 27
- 239000011347 resin Substances 0.000 claims description 27
- 229920001187 thermosetting polymer Polymers 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 14
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000004917 carbon fiber Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 229920000647 polyepoxide Polymers 0.000 description 5
- 239000003365 glass fiber Substances 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 239000012779 reinforcing material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229920006231 aramid fiber Polymers 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229920003369 Kevlar® 49 Polymers 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- OYQYHJRSHHYEIG-UHFFFAOYSA-N ethyl carbamate;urea Chemical compound NC(N)=O.CCOC(N)=O OYQYHJRSHHYEIG-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polyparaphenylene benzobisoxazole Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Images
Landscapes
- Working Measures On Existing Buildindgs (AREA)
- Bridges Or Land Bridges (AREA)
Description
本発明は、鋼構造物の補強方法に関し、さらに詳しくは、例えば鉄橋のトラスト構造などの、鋼構造物の効率的な補強方法に関わる。 The present invention relates to a method for reinforcing a steel structure, and more particularly to an efficient method for reinforcing a steel structure, such as a steel bridge trust structure.
鋼材は、優れた強度や靭性、高い弾性率などを備えることから、鉄橋のトラスト構造やその他の構造物に用いられている。この鋼構造物は、屋外に露出させて配置された場合、日光や風雨などに曝されると腐食により板厚が減少する、いわゆる減肉を生じ、構造特性が著しく低下することがある。
従来はこの減肉を生じた場合、補強用の鋼板をボルトや溶接、接着剤などで固定することで補強する方法がある(例えば、特許文献１参照。以下、従来技術１という。)。
Steel materials are used in steel bridge trust structures and other structures because they have excellent strength, toughness, high elastic modulus, and the like. When this steel structure is placed outdoors and exposed to sunlight or wind and rain, the thickness of the steel structure decreases due to corrosion, so-called thinning, and the structural characteristics may be significantly reduced.
Conventionally, when this thinning occurs, there is a method of reinforcing a steel plate for reinforcement by fixing it with bolts, welding, an adhesive or the like (for example, refer to
しかしながら、この従来技術１では、ボルトによる固定では補強用の鋼板と鋼構造物とを一体化することが容易でなく、溶接による場合は高度な溶接技術が必要とされるうえ、特に鉄橋のトラスト構造など高所での作業が極めて困難な問題がある。さらに、鋼構造物の補強対象となる部分の形状に厳密に合わせて補強用鋼板を制作する必要があるので、コストがかかり、作業性も問題がある。
また、接着剤による補強用鋼板の固定では、鋼構造物と補強用鋼板との接着力を十分に高くすることが容易でないために、剥離を生じる問題がある。
However, in this
In addition, the fixing of the reinforcing steel plate with an adhesive has a problem of causing peeling because it is not easy to sufficiently increase the adhesive force between the steel structure and the reinforcing steel plate.
また、他の従来の鋼構造物の補強方法として、補強用鋼板に代えて、高強度繊維を接着剤で鋼構造物の表面に貼り付ける方法がある(例えば、特許文献２参照。以下、従来技術２という。)。
In addition, as another conventional method for reinforcing a steel structure, there is a method in which high-strength fibers are attached to the surface of the steel structure with an adhesive instead of a reinforcing steel plate (see, for example,
しかしながら、高強度繊維材は鋼材などに比べて十分に高い引張強度を備えるものの、弾性率については鋼材よりも小さい場合がある。このため、この従来技術２では、弾性率に基づいて設計された鋼構造物を補強する場合に、例えばアラミド繊維やガラス繊維では多量の繊維材を必要とし、安価に実施できない問題があった。また、弾性率の高い炭素繊維においては、炭素繊維が通電性であるために、鋼構造物の表面に貼り付けた場合、炭素繊維と鋼構造物の電位差から、鋼構造物の腐食が促進される問題があり、炭素繊維の使用は制限を受けやすい。
However, although a high-strength fiber material has a sufficiently high tensile strength as compared with a steel material or the like, the elastic modulus may be smaller than that of a steel material. For this reason, in this
本発明は上記の問題点を解消し、鋼構造物を簡便に補強できるうえ、鋼構造物の機械的強度や弾性率を高めるとともに靭性を向上させ、終局破壊強度を向上できる、鋼構造物の補強方法を提供することを技術的課題とする。 The present invention solves the above-mentioned problems and can easily reinforce the steel structure, and also increases the mechanical strength and elastic modulus of the steel structure and improves the toughness, and can improve the ultimate fracture strength. It is a technical problem to provide a reinforcing method.
本発明は上記の課題を解決するために、鋼構造物の補強方法において、鋼構造物(１)の表面に繊維製シート(２)と金属製補強体(３)とを熱硬化性樹脂を用いて貼り付けたのち、この熱硬化性樹脂を硬化させることを特徴とする。 In order to solve the above-mentioned problems, the present invention provides a method for reinforcing a steel structure in which a fiber sheet (2) and a metal reinforcement (3) are attached to the surface of the steel structure (1) with a thermosetting resin. After being used and pasted, this thermosetting resin is cured.
上記の繊維製シートは鋼構造物の表面に沿わせることにより、補強材の一部として作用するとともに、この繊維製シートを介して金属製補強体が鋼構造物に確りと固定される。この金属製補強体は弾性率が高いので、曲げ応力等に対して効果的に作用する。 The above-mentioned fiber sheet acts as a part of the reinforcing material by being along the surface of the steel structure, and the metal reinforcing body is securely fixed to the steel structure via the fiber sheet. Since this metal reinforcement has a high elastic modulus, it effectively acts against bending stress and the like.
鋼構造物の表面に直接金属製補強体を配置した場合は、この鋼構造物と金属製補強体の間の接着が弱く、外力が働くと容易にはがれる惧れがある。従って、鋼構造物の表面側から順に、繊維製シートと金属製補強体とを貼り付け、あるいはその上にさらに第２の繊維製シートを貼り付けることで、この繊維製シートを介して金属製補強体を鋼構造物に一層しっかりと固定することができる。 When a metal reinforcement is disposed directly on the surface of the steel structure, the adhesion between the steel structure and the metal reinforcement is weak and may be easily peeled off when an external force is applied. Therefore, in order from the surface side of the steel structure, the fiber sheet and the metal reinforcing body are attached, or the second fiber sheet is further attached thereon, and the metal sheet is interposed through the fiber sheet. The reinforcing body can be more firmly fixed to the steel structure.
上記の金属製補強体の材質は特定の材質に限定されないが、力学特性的には弾性率が高いほど好ましく、具体的にはステンレス鋼材や防錆処理を施した鋼材などが好ましい。
上記の金属製補強体の形態は特に限定されないが、板状や線状が好ましい。板状の場合には、取扱いの容易さやコスト等の観点から、幅は５〜２００mm、好ましくは１０〜１００mmのものが用いられ、厚さは０.２〜２.５mmのものが用いられるが、特にこれらの寸法に限定されるものではない。また、線状の場合には、その直径は０.２〜３.５mmのものが用いられるが、特にこれらの寸法に限定されるものではない。
上記の金属製補強体は、鋼構造物の表面形状が円筒面などの曲面である場合、この鋼構造物の表面形状にあった形状に加工しても良い。
The material of the metal reinforcing body is not limited to a specific material, but the higher the modulus of elasticity, the more preferable in terms of mechanical properties. Specifically, a stainless steel material or a steel material subjected to rust prevention treatment is preferable.
Although the form of said metal reinforcement body is not specifically limited, Plate shape and linear shape are preferable. In the case of a plate, from the viewpoint of ease of handling and cost, a width of 5 to 200 mm, preferably 10 to 100 mm, and a thickness of 0.2 to 2.5 mm are used. However, it is not particularly limited to these dimensions. In the case of a linear shape, a diameter of 0.2 to 3.5 mm is used, but it is not particularly limited to these dimensions.
When the surface shape of the steel structure is a curved surface such as a cylindrical surface, the metal reinforcing body may be processed into a shape that matches the surface shape of the steel structure.
上記の繊維製シートの材質としては、例えばポリビニル繊維、ポリエステル繊維、ポリアミド繊維、パラ系アラミド繊維、全芳香族ポリエステル繊維、ポリパラフェニレンベンゾビスオキサゾール繊維、炭素繊維及びガラス繊維などを挙げることができる。ただし、炭素繊維の場合には、通常、鋼構造物や補強用鋼板と絶縁する必要がある。
上記の繊維製シートの形態としては織物、編物又は不織布であってもよい。織物としては平織、綾織などが挙げられる。繊維製シートの目付は例えば５０〜２０００g/m2が好ましい。
Examples of the material for the fiber sheet include polyvinyl fiber, polyester fiber, polyamide fiber, para-aramid fiber, wholly aromatic polyester fiber, polyparaphenylene benzobisoxazole fiber, carbon fiber, and glass fiber. . However, in the case of carbon fiber, it is usually necessary to insulate from a steel structure or a reinforcing steel plate.
The fiber sheet may be a woven fabric, a knitted fabric or a non-woven fabric. Examples of the woven fabric include plain weave and twill weave. The basis weight of the fiber sheet is preferably, for example, 50 to 2000 g / m 2 .
上記の熱硬化性樹脂としては、例えばエポキシ樹脂、メタクリレート樹脂、不飽和ポリエステル樹脂又はビニルエステル樹脂、ウレアウレタン樹脂等の公知の熱硬化性樹脂が挙げられる。このなかで、常温硬化型エポキシ樹脂が好ましい。この場合の標準使用量は繊維製シートの種類にもよるが、下塗りの場合、０.２〜２kg/m2であり、上塗りの場合は０.２〜１kg/m2である(全体では０.５〜３.０kg/m2の範囲となる)。 Examples of the thermosetting resin include known thermosetting resins such as epoxy resins, methacrylate resins, unsaturated polyester resins or vinyl ester resins, and urea urethane resins. Among these, a room temperature curing type epoxy resin is preferable. The standard amount of the case will depend on the type of textile sheet, when the undercoat is 0.2~2kg / m 2, in the case of top coat is 0.2~1kg / m 2 (in total 0 0.5 to 3.0 kg / m 2 ).
本発明は上記のように構成され作用することから、次の効果を奏する。
即ち、熱硬化性樹脂を用いて、鋼構造物の表面に繊維製シートと金属製補強体を貼り付けたのち、この熱硬化性樹脂を、例えば常温下などで、硬化させるだけであるので、溶接装置など大型の設備を必要とせず、簡単に施行できるうえ、上記の繊維シートを介して金属製補強体を鋼構造物に確りと固定することができ、容易に剥離することがなく、鋼構造物を確実に補強することができる。
Since the present invention is configured and operates as described above, the following effects can be obtained.
That is, using a thermosetting resin, after pasting a fiber sheet and a metal reinforcement on the surface of a steel structure, this thermosetting resin is only cured at room temperature, for example, Large equipment such as welding equipment is not required and can be easily implemented, and the metal reinforcing body can be securely fixed to the steel structure via the fiber sheet, and it is not easily peeled off. The structure can be reliably reinforced.
そして、上記の繊維製シートは補強材の一部として作用し、特に高強度繊維を用いた場合は引張強度が高く、金属製補強体とともに鋼構造物の強度性能を効率よく高めることができ、終局破壊強度を向上できる。また、補強用鋼板を用いる前記の従来技術１と比べて形状的制約が少なく、施工が容易である。しかも、上記の金属製補強体は優れた靭性を備えるうえ、弾性率が高く、曲げ応力等に対して効果的に作用するので、鋼構造物に曲げ応力等が加わった際の、クラック発生などを効果的に防止でき、繊維製シートのみで補強する前記の従来技術２に比べて、大幅に安価に実施することができる。
And the above fiber sheet acts as a part of the reinforcing material, particularly when high strength fibers are used, the tensile strength is high, and the strength performance of the steel structure can be efficiently enhanced together with the metal reinforcing body, Ultimate fracture strength can be improved. Moreover, there are few shape restrictions compared with the said
以下、本発明の実施の形態を図面に基づき説明する。
図１は本発明の実施形態を示し、補強された鋼構造物の要部を拡大した一部破断斜視図である。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment of the present invention, and is a partially broken perspective view showing an enlarged main part of a reinforced steel structure.
図１に示すように、Ｈ型鋼などの鋼構造物(１)の表面には、最初に繊維製シート(２)が貼り付けられ、この繊維製シート(２)の外側に複数の長尺金属製補強板(３)が、その長さ方向を鋼構造物(１)の長さ方向と平行に配置され、さらにその外側に第２の繊維製シート(４)が貼り付けられ、これらの各補強材(２・３・４)が、熱硬化性樹脂により固定されている。 As shown in FIG. 1, a fiber sheet (2) is first attached to the surface of a steel structure (1) such as an H-shaped steel, and a plurality of long metals are attached to the outside of the fiber sheet (2). The reinforcing plate (3) is arranged with its length direction parallel to the length direction of the steel structure (1), and the second fiber sheet (4) is attached to the outside thereof. The reinforcing material (2, 3, 4) is fixed by a thermosetting resin.
次に、上記の鋼構造物(１)の表面に各補強材を固定する手順について説明する。
最初に、上記の鋼構造物(１)は、好ましくは予め表面処理が施される。
即ち、鋼構造物(１)の表面がグラインダー等で研磨され、錆や微細な凹凸部、汚れなどが除去される。グラインダーとしては例えばバフ加工用のグラインダーでよい。この研磨処理は鋼構造物(１)表面の錆や汚れなど、表面上の弱い層を除去するものであり、サンドブラストなど他の研磨方法によって行ってもよい。なお、鋼構造物(１)の表面に脆弱層がない等の場合はこの研磨処理を省いてもよい。
Next, the procedure for fixing each reinforcing material to the surface of the steel structure (1) will be described.
First, the steel structure (1) is preferably subjected to surface treatment in advance.
That is, the surface of the steel structure (1) is polished with a grinder or the like to remove rust, fine irregularities, dirt, and the like. The grinder may be a buffing grinder, for example. This polishing treatment is for removing weak layers on the surface such as rust and dirt on the surface of the steel structure (1), and may be performed by other polishing methods such as sandblasting. In the case where there is no fragile layer on the surface of the steel structure (1), this polishing treatment may be omitted.
次に、上記の鋼構造物(１)の表面が乾燥されていることを確認したのち、例えば粘度の低い常温硬化型エポキシ樹脂のプライマーがローラー、刷毛等で塗布される。このとき、上記の鋼構造物(１)の表面に段差がある場合は、エポキシ系パテ等の不陸調整材を用いて平坦に仕上げるのが好ましい。上記のプライマー樹脂使用量は表面の状態にもよるが通常０.１〜０.３kg/m2である。なお、プライマー処理における樹脂の種類には前記の熱硬化性樹脂と同種類とするのが好ましい。また、上記のプライマーには、鋼構造物の防触を目的とした防錆材料など、任意の成分を必要に応じて添加しても良い。 Next, after confirming that the surface of the steel structure (1) is dried, for example, a primer of low-temperature-setting epoxy resin having a low viscosity is applied with a roller, a brush or the like. At this time, when there is a step on the surface of the steel structure (1), it is preferable to finish it flat using a non-land surface adjusting material such as epoxy putty. The amount of the primer resin used is usually 0.1 to 0.3 kg / m 2 depending on the surface condition. In addition, it is preferable to make it the same kind as the said thermosetting resin in the kind of resin in primer processing. Moreover, you may add arbitrary components, such as a rust prevention material for the purpose of the anti-corrosion of a steel structure, to said primer as needed.
次に、上記の熱硬化性樹脂が上記の鋼構造物(１)の表面に下塗りされたのち、上記の繊維製シート(２)が鋼構造物(１)の表面に貼り付けられ、次いで上記の金属製補強板(３)が、その長さ方向を上記の鋼構造物(１)の補強を必要とする方向と平行にして上記の繊維製シート(２)の外側に配置される。そして上記の下塗り熱硬化性樹脂が繊維製シート(２)へ十分含浸したことが確認された後、さらにその上に同じく熱硬化性樹脂の上塗りが行われる。この場合の標準使用量は繊維の種類にもよるが、下塗りの場合０.２〜２kg/m2であり、上塗りの場合は０.２〜１kg/m2である(全体では０.５〜３.０kg/m2の範囲となる)。 Next, after the thermosetting resin is primed on the surface of the steel structure (1), the fiber sheet (2) is attached to the surface of the steel structure (1), and then the above-mentioned The metal reinforcing plate (3) is disposed outside the fiber sheet (2) with its length direction parallel to the direction in which the steel structure (1) needs to be reinforced. Then, after it is confirmed that the undercoat thermosetting resin is sufficiently impregnated into the fiber sheet (2), the thermosetting resin is further overcoated in the same manner. Standard amount in this case varies depending on the kind of fiber, the case of the undercoat was 0.2~2kg / m 2, in the case of top coat is 0.2~1kg / m 2 (0.5~ the entire The range is 3.0 kg / m 2 ).
次に、第２の繊維製シート(４)が上記の金属製補強板(３)の上に、上記の鋼構造物や金属製補強板(３)の補強を必要とする方向と交差する方向に、好ましくは直角方向に貼り付けられ、上記と同種の熱硬化性樹脂が上塗りされる。なお、この第２の繊維製シート(４)や上記の繊維製シート(２)は、上記の鋼構造物(１)が鋼管である場合など、鋼構造物(１)の周囲に捲き付けることができる場合は、それぞれの繊維シート(２・４)を鋼構造物(１)の表面に捲きつけても良い。 Next, the direction in which the second fiber sheet (4) intersects the direction in which the steel structure or the metal reinforcing plate (3) needs to be reinforced on the metal reinforcing plate (3). In addition, it is preferably attached in a right angle direction, and a thermosetting resin of the same kind as above is overcoated. The second fiber sheet (4) and the fiber sheet (2) should be wound around the steel structure (1), such as when the steel structure (1) is a steel pipe. If it is possible, each fiber sheet (2, 4) may be rubbed against the surface of the steel structure (1).
上記の手順により、鋼構造物(１)の表面には、繊維製シート(２)と金属製補強板(３)と第２の繊維製シート(４)とが順に貼り付けられる。このため、上記の鋼構造物(１)と金属製補強板(３)はいずれもこの間に介在する繊維製シート(２)に密着しており、従って、金属製補強板(３)は鋼構造物(１)に高い接着強度で固定することができる。 By the above procedure, the fiber sheet (2), the metal reinforcing plate (3), and the second fiber sheet (4) are attached to the surface of the steel structure (1) in this order. For this reason, both the steel structure (1) and the metal reinforcing plate (3) are in close contact with the fiber sheet (2) interposed therebetween, and therefore the metal reinforcing plate (3) is a steel structure. It can be fixed to the object (1) with high adhesive strength.
上記の繊維製シート(２・４)を鋼構造物(１)の表面に接着する際には、脱泡ローラーやゴムへらを使用して空気溜まりが残らないようにしごきながら、鋼構造物(１)の表面に貼付けることが望ましい。
また、繊維製シート(２・４)や金属製補強板(３)を接着したのち、上記の繊維製シート(２・４)に含浸した熱硬化性樹脂は、ビニールシート等で蔽って養生させることが好ましい。
なお、上記の繊維製シート(２・４)と金属製補強板(３)で補強された鋼構造物(１)は、さらに樹脂系塗装材料等を表面に塗布することもできる。
When adhering the fiber sheet (2.4) to the surface of the steel structure (1), use a defoaming roller or a rubber spatula to squeeze out the air pool and leave the steel structure ( It is desirable to affix to the surface of 1).
In addition, after bonding the fiber sheet (2, 4) or the metal reinforcing plate (3), the thermosetting resin impregnated in the fiber sheet (2, 4) is covered with a vinyl sheet and cured. It is preferable to make it.
The steel structure (1) reinforced with the fiber sheet (2, 4) and the metal reinforcing plate (3) can be further coated with a resin coating material or the like.
上記の実施形態では鋼構造物(１)としてＨ型鋼を用いたが、本発明により適用される鋼構造物はこの形状の鋼材に限定されるものではなく、他の形状や構造のものであってもよいことは、いうまでもない。 In the above embodiment, H-shaped steel is used as the steel structure (1). However, the steel structure applied according to the present invention is not limited to the steel material of this shape, and is of other shapes and structures. Needless to say, it may be.
次に、本発明の補強方法により鋼構造物を補強した場合の具体的な補強効果を、実施例に基づいて説明する。 Next, the concrete reinforcement effect at the time of reinforcing a steel structure with the reinforcement method of this invention is demonstrated based on an Example.
補強される鋼構造物(１)としては、厚さ５mm、幅１０cm、長さ４０cmの鋼板を用いた。そしてこの鋼構造物(１)の表面を予め研磨したのち、常温硬化型エポキシ樹脂プライマー（住友ゴム工業株式会社製、商品名：GB30）を０.２kg/m2塗布した。そして、含浸接着剤として同じく常温硬化型エポキシ樹脂（住友ゴム工業株式会社製、商品名：GB35）をその外周表面にローラーで均一に塗布し、最初に繊維製シート(２)を貼り付け、その外側に厚さ２mmの金属製補強板(３)を、その長さ方向が鋼構造物(１)の長さ方向と平行になるように貼り付けたのち、上記の熱硬化性樹脂を上塗りした。そしてさらにその外側に、第２の繊維製シート(４)を１層巻き付け、熱硬化性樹脂を上塗りした。なお、上記の熱硬化性樹脂の量はいずれも０.５kg/m2であった。
そしてその後、上記の熱硬化性樹脂を硬化させて試験体を得た。
As the steel structure (1) to be reinforced, a steel plate having a thickness of 5 mm, a width of 10 cm, and a length of 40 cm was used. And after grind | polishing the surface of this steel structure (1) previously, 0.2 kg / m < 2 > of normal temperature hardening type epoxy resin primers (the Sumitomo Rubber Industries Ltd. make, brand name: GB30) were apply | coated. Then, a room temperature curing type epoxy resin (manufactured by Sumitomo Rubber Industries, Ltd., trade name: GB35) is uniformly applied to the outer peripheral surface with a roller as an impregnation adhesive, and a fiber sheet (2) is first attached, A metal reinforcing plate (3) with a thickness of 2 mm was attached to the outside so that the length direction was parallel to the length direction of the steel structure (1), and then the above thermosetting resin was overcoated. . Further, on the outer side, one layer of the second fiber sheet (4) was wound and overcoated with a thermosetting resin. The amount of the above thermosetting resin was 0.5 kg / m 2 .
And after that, said thermosetting resin was hardened and the test body was obtained.
上記の繊維製シート(２)としては、アラミド繊維(東レデュポン株式会社製、商品名ケブラー４９)製シート(目付け量２８０ｇ/m2、耐力４０ｔｆ/ｍ)を用いた。
また、上記の第２の繊維製シート(４)としては、実施例１では上記のアラミド繊維製シートを、実施例２ではガラス繊維(Ｅガラス繊維)製シート(目付け量３００ｇ/m2)を、実施例３ではビニロン繊維製シート(目付け量３００ｇ/m2)を、それぞれ用いた。
As the fiber sheet (2), an aramid fiber sheet (trade name Kevlar 49, manufactured by Toray DuPont Co., Ltd.) (weight per unit area 280 g / m 2 , yield strength 40 tf / m) was used.
In addition, as the second fiber sheet (4), in Example 1, the aramid fiber sheet is used, and in Example 2, the glass fiber (E glass fiber) sheet (weight per unit area: 300 g / m 2 ) is used. In Example 3, vinylon fiber sheets (weight per unit area 300 g / m 2 ) were used.
上記の試験体は、ＪＩＳ Ｚ ２２４８に準拠する試験方法で曲げ強度を測定した。即ち、スパン間距離を２００mmとし、２つの支えは円形でその半径が５mm、中間押金具は半径が５mmの半円断面の、３点曲げ方式とした。試験体は補強面を下とし、クロスヘッド速度は２mm/分とした。これらの測定結果を、上記の補強を施していない鋼板を比較例として対比しながら、表１に示す。 Said test body measured bending strength with the test method based on JISZ2248. That is, the distance between the spans was 200 mm, the two supports were circular, the radius was 5 mm, and the intermediate metal fitting was a three-point bending method with a semicircular cross section having a radius of 5 mm. The test body had the reinforcing surface down and the crosshead speed was 2 mm / min. These measurement results are shown in Table 1 while comparing the steel sheets not subjected to the above-mentioned reinforcement as comparative examples.
上記の測定結果から明らかなように、本発明ではいずれの繊維材料を用いた場合であっても、鋼構造物(１)に金属製補強板(３)が、曲げ試験中に剥離することなく確りと固定されており、金属製補強板(３)による補強効果を良好に発揮させることができた。 As is clear from the above measurement results, in the present invention, the metal reinforcing plate (3) is not peeled off during the bending test even if any fiber material is used in the present invention. It was firmly fixed and the reinforcing effect by the metal reinforcing plate (3) could be exhibited well.
本発明は鉄骨構造物など、各種の鋼構造物に適用されるが、特に鉄橋など、屋外で露出される鋼構造物に好適である。 The present invention is applied to various steel structures such as a steel structure, and is particularly suitable for steel structures exposed outdoors such as an iron bridge.
１…鋼構造物
２…繊維製シート
３…金属製補強材(金属製補強板、ステンレス鋼板)
４…第２の繊維製シート
DESCRIPTION OF
4 ... Second fiber sheet
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003308357A JP4068033B2 (en) | 2003-09-01 | 2003-09-01 | Steel structure reinforcement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003308357A JP4068033B2 (en) | 2003-09-01 | 2003-09-01 | Steel structure reinforcement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005076300A JP2005076300A (en) | 2005-03-24 |
| JP4068033B2 true JP4068033B2 (en) | 2008-03-26 |
Family
ID=34410852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003308357A Expired - Fee Related JP4068033B2 (en) | 2003-09-01 | 2003-09-01 | Steel structure reinforcement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4068033B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011162985A (en) * | 2010-02-08 | 2011-08-25 | Taiheiyo Cement Corp | Structure for reinforcing steel girder, and method for constructing the same |
| JP5688525B2 (en) * | 2010-08-31 | 2015-03-25 | 国立大学法人長岡技術科学大学 | Steel fiber reinforced resin repair reinforcement structure and repair reinforcement method |
| JP2013189845A (en) * | 2012-02-14 | 2013-09-26 | Ihi Corp | Repair structure of steel material |
| KR101399578B1 (en) * | 2013-08-28 | 2014-05-27 | 주식회사 이원그린텍 | Wall repairing method using frp |
| JP5946948B1 (en) * | 2015-12-07 | 2016-07-06 | 阪神高速技術株式会社 | Method for removing steel slab and concrete layer of steel slab |
| JP6427624B1 (en) * | 2017-05-16 | 2018-11-21 | 阿南電機株式会社 | Repair method of steel structure |
| JP6399623B1 (en) * | 2017-08-21 | 2018-10-03 | 槇谷 榮次 | Damping and seismic reinforcement structure for concrete structures |
| JP6304914B1 (en) * | 2017-10-27 | 2018-04-04 | 槇谷 榮次 | Seismic reinforcement structure for existing or new steel structures |
-
2003
- 2003-09-01 JP JP2003308357A patent/JP4068033B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005076300A (en) | 2005-03-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5820435B2 (en) | Method for reinforcing steel structure and elastic layer forming material for reinforcing steel structure | |
| JP2008063758A (en) | Structure reinforcing method | |
| JP4068033B2 (en) | Steel structure reinforcement method | |
| US3646651A (en) | Abrasion and corrosion resistant composite structural materials and the like | |
| JP2001303715A (en) | Metal tubular column, and reinforcing method thereof | |
| JP5645440B2 (en) | Structure reinforcement method | |
| JP5478651B2 (en) | Reinforcing method and reinforcing structure for concrete structure, and elastic layer forming material for reinforcing concrete structure | |
| TWI832842B (en) | Laminated materials for reinforcing structures, reinforcing methods and reinforcing structures | |
| JP3415107B2 (en) | Method for reinforcing concrete structure and reinforcing structure | |
| JP6327634B2 (en) | Repair and reinforcement method for steel structures | |
| JP7153995B1 (en) | Coating agent application method, fiber sheet, and fiber sheet construction method | |
| JP3816064B2 (en) | Method for reinforcing concrete structures | |
| JP4127811B2 (en) | Reinforcement method for steel structure | |
| JP6980365B2 (en) | How to reinforce a steel chimney | |
| KR100433379B1 (en) | Panel for reinforcing conc'c body and reinforcing method using the same | |
| JP2015124552A (en) | Method for repairing and reinforcing steel bridge and reinforcement structure | |
| JP3443497B2 (en) | Reinforcement method of structure with reinforced fiber sheet | |
| JP3553865B2 (en) | Method of reinforcing steel structure and buffer layer for reinforcing steel structure | |
| JPH06327380A (en) | Fishing rod | |
| JPH0593463A (en) | Reinforcing method for existing concrete structure | |
| JP4130781B2 (en) | Fiber reinforced plastic boards and concrete structures | |
| JP2003055966A (en) | Preparation method of prestressed concrete pile member | |
| JP6900938B2 (en) | Heavy-duty anticorrosion coated steel and its manufacturing method | |
| JPH1144099A (en) | Repaired and reinforced concrete structure and method for repairing and reinforcing the same | |
| JP2851680B2 (en) | How to reinforce structures |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20060612 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20070727 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070731 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070926 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20071106 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20071218 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20080109 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110118 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 Ref document number: 4068033 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110118 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120118 Year of fee payment: 4 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130118 Year of fee payment: 5 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140118 Year of fee payment: 6 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |