JP2018009306A - Aseismatic reinforcement structure for steel structure made of h-section steel - Google Patents

Aseismatic reinforcement structure for steel structure made of h-section steel Download PDF

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JP2018009306A
JP2018009306A JP2016137225A JP2016137225A JP2018009306A JP 2018009306 A JP2018009306 A JP 2018009306A JP 2016137225 A JP2016137225 A JP 2016137225A JP 2016137225 A JP2016137225 A JP 2016137225A JP 2018009306 A JP2018009306 A JP 2018009306A
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steel
flange
reinforcing
fixing
web
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JP5999862B1 (en
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藤本 隆司
Takashi Fujimoto
隆司 藤本
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株式会社フジモト
Fujimoto:Kk
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PROBLEM TO BE SOLVED: To provide an aseismatic reinforcement structure for a steel structure made of an H-section steel, in which the aseismatic reinforcement structure has a simple structure, facilitates assembly work, facilitates work in a narrow work space, can significantly reduce an amount of a grout material to be filled, and can prevent deterioration of a high-strength fiber sheet that contributes toward attenuation of seismic energy and enhancement of tensile strength.SOLUTION: An aseismatic reinforcement structure includes: a steel structure made of an H-section steel having a flange on which a fixing hole is formed, and a web connecting both flanges; a reinforcement member having a high-strength fiber sheet disposed on an inner surface, having the fixing hole formed on both edges, and forming a closed space among the reinforcement member, the flange, and the web; a fixing member inserted into the fixing hole on both edges of the reinforcement member and the fixing hole formed on the flange, for fixing the reinforcement member on the steel structure made of the H-section steel; and a solidification material filled in the closed space among the reinforcement member, the flange, and the web.SELECTED DRAWING: Figure 1

Description

本発明は、H型鋼からなる鉄骨構造物の耐震補強構造に関する。   The present invention relates to a seismic reinforcement structure for steel structures made of H-shaped steel.
従来、H型鋼からなる鉄骨構造物の補強構造として、対向する一対のフランジと、その対向間隔内に設けたウェブとによって断面形状をH型としたH型鋼柱の外周を囲い鋼板で囲み、この囲い鋼板で囲んだ内側にグラウト材を充填するとともにグラウト材に軸方向筋を埋設して補強柱を構成するH型鋼柱の補強構造において、ウェブに平行な面側に配置する軸方向の総合曲げ耐力を、フランジに平行な面側に配置する軸方向筋の総合曲げ耐力より強くして、補強柱の全方向における曲げ耐力を均等にするH型鋼柱からなる鉄骨構造の補強構造が提案されている。また、囲い鋼板の外周に繊維シートを配置し、引張強度とエネルギー減衰性能を向上させる先行技術が存在する。   Conventionally, as a reinforcing structure of a steel structure made of H-shaped steel, the outer periphery of an H-shaped steel column having an H-shaped cross-section is surrounded by a steel plate with a pair of opposing flanges and a web provided within the facing interval. In the reinforcing structure of the H-shaped steel column, which is filled with grout material inside the enclosed steel plate and has axial streaks embedded in the grout material to constitute the reinforcing column, the total bending in the axial direction arranged on the side parallel to the web There has been proposed a reinforcing structure of a steel structure consisting of H-shaped steel columns that makes the yield strength stronger than the total bending strength of the axial streaks arranged on the side parallel to the flange, and equalizes the flexural strength in all directions of the reinforcing columns. Yes. In addition, there is a prior art in which a fiber sheet is disposed on the outer periphery of an enclosed steel plate to improve tensile strength and energy attenuation performance.
特許第5725486号公報Japanese Patent No. 5725486
しかしながら、従来のH型鋼からなる鉄骨構造物の補強構造は、H型鋼からなる鉄骨構造物の周囲を囲い鋼板で囲み、囲い鋼板で囲んだ内側にグラウト材を充填するため、グラウト材を充填する空間が大きく充填するグラウト材の量を大きくなるという問題を有する。また、H型鋼からなる鉄骨構造物を補強する場合、場合によってはH型鋼からなる鉄骨構造物の一方の側だけしか空き空間が無いこともあり、H型鋼からなる鉄骨構造物の全周を囲い鋼板で囲むことができないという問題を有していた。また、囲い鋼板の外周に繊維シートを配置する従来技術においては、繊維シートが環境下に曝されるため、紫外線等により劣化しその性能が著しく低下するという問題を有していた。   However, in the conventional reinforcing structure of a steel structure made of H-shaped steel, the steel structure made of H-shaped steel is surrounded by a surrounding steel plate, and the grout material is filled inside because it is enclosed by the surrounding steel plate. There is a problem that the amount of grout material to be filled is large. In addition, when reinforcing a steel structure made of H-shaped steel, there may be a vacant space only on one side of the steel structure made of H-shaped steel, and encloses the entire circumference of the steel structure made of H-shaped steel. It had a problem that it could not be surrounded by a steel plate. Moreover, in the prior art which arrange | positions a fiber sheet on the outer periphery of an enclosure steel plate, since the fiber sheet was exposed to an environment, there existed a problem that the performance deteriorated remarkably by an ultraviolet-ray etc.
本発明は、従来技術のもつ課題を解決する、構造が簡単で組み立て作業が容易で、狭い作業空間での作業も容易にでき、充填するグラウト材の量も大幅に減らすことができ、地震エネルギーの減衰、引張強度の向上に寄与する高強度繊維シートの劣化を防止することが可能なH型鋼からなる鉄骨構造物の耐震補強構造を提供することを目的とする。   The present invention solves the problems of the prior art, has a simple structure, is easy to assemble, can easily work in a narrow work space, can greatly reduce the amount of grout material to be filled, An object of the present invention is to provide a seismic reinforcement structure for a steel structure made of H-shaped steel that can prevent deterioration of a high-strength fiber sheet that contributes to the improvement of damping and tensile strength.
本発明のH型鋼からなる鉄骨構造物の耐震補強構造は、前記課題を解決するために、固定用孔を形成したフランジと両フランジ間を連結するウェブを有するH型鋼からなる鉄骨構造物と、内面に高強度繊維シートを配置し、両端に固定用孔を形成しフランジ、ウェブとの間に閉じた空間を形成する補強部材と、補強部材の両端の固定用孔とフランジに形成した固定用孔に挿入して補強部材をH型鋼からなる鉄骨構造物に固定する固定部材と、補強部材とフランジ、ウェブとの間の閉じた空間に充填される固化材と、を備えることを特徴とする。   In order to solve the above problems, the seismic reinforcement structure for a steel structure made of H-shaped steel according to the present invention includes a steel structure made of H-shaped steel having a flange formed with a fixing hole and a web connecting between both flanges. A high strength fiber sheet is arranged on the inner surface, fixing holes are formed on both ends, a flange, a reinforcing member that forms a closed space between the web, and fixing holes formed on the fixing holes and flanges on both ends of the reinforcing member A fixing member that is inserted into the hole to fix the reinforcing member to the steel structure made of H-shaped steel, and a solidified material that fills a closed space between the reinforcing member, the flange, and the web. .
また、本発明のH型鋼からなる鉄骨構造物の耐震補強構造は、一端をウェブに溶着される定着部材を備えることを特徴とする。   Moreover, the seismic reinforcement structure of the steel structure which consists of H-shaped steel of this invention is equipped with the fixing member welded to a web by one end.
また、本発明のH型鋼からなる鉄骨構造物の耐震補強構造は、補強部材をウェブの一方の側のフランジ又はウェブの両方の側のフランジに固定することを特徴とする。   Moreover, the seismic reinforcement structure for steel structures made of H-shaped steel according to the present invention is characterized in that the reinforcing member is fixed to the flange on one side of the web or the flange on both sides of the web.
また、本発明のH型鋼からなる鉄骨構造物の耐震補強構造は、フランジと補強部材の固定部に補強プレートを配置することを特徴とする。   Moreover, the seismic strengthening structure for steel structures made of H-shaped steel according to the present invention is characterized in that a reinforcing plate is arranged at a fixing portion between the flange and the reinforcing member.
固定用孔を形成したフランジと両フランジ間を連結するウェブを有するH型鋼からなる鉄骨構造物と、内面に高強度繊維シートを配置し、両端に固定用孔を形成しフランジ、ウェブとの間に閉じた空間を形成する補強部材と、補強部材の両端の固定用孔とフランジに形成した固定用孔に挿入して補強部材をH型鋼からなる鉄骨構造物に固定する固定部材と、補強部材とフランジ、ウェブとの間の閉じた空間に充填される固化材と、を備えることで、構造が簡単で組み立て作業が容易で、狭い作業空間での作業も容易にでき、充填するグラウト材の量も大幅に減らすことができ、地震エネルギーの減衰、引張強度の向上に寄与する高強度繊維シートの劣化を防止することが可能となる。
一端をウェブに溶着される定着部材を備えることで、固化材との一体化を促進し耐震性能を向上することが可能となる。
補強部材をウェブの一方の側のフランジ又はウェブの両方の側のフランジに固定することで、耐震補強するH型鋼からなる鉄骨構造物の状態に応じた耐震補強をすることが可能となる。
フランジと補強部材の固定部に補強プレートを配置することで、大地震による大きな変位に対しても耐える固定部とすることが可能となる。
A steel structure made of H-shaped steel having a flange formed with fixing holes and a web connecting the two flanges, a high-strength fiber sheet is arranged on the inner surface, fixing holes are formed on both ends, and between the flange and the web A reinforcing member that forms a closed space, a fixing member that is inserted into a fixing hole at both ends of the reinforcing member and a fixing hole formed in the flange, and fixes the reinforcing member to the steel structure made of H-shaped steel, and the reinforcing member And a solidified material filled in a closed space between the flange and the web, the structure is simple, the assembly work is easy, the work in a narrow work space is easy, and the grout material to be filled The amount can also be greatly reduced, and it becomes possible to prevent deterioration of the high-strength fiber sheet that contributes to attenuation of seismic energy and improvement of tensile strength.
By providing a fixing member whose one end is welded to the web, it is possible to promote integration with the solidifying material and improve seismic performance.
By fixing the reinforcing member to the flange on one side of the web or the flange on both sides of the web, it becomes possible to perform seismic reinforcement according to the state of the steel structure made of H-shaped steel to be seismically strengthened.
By disposing the reinforcing plate on the fixing portion between the flange and the reinforcing member, it is possible to make the fixing portion resistant to a large displacement due to a large earthquake.
本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention.
本発明のH型鋼からなる鉄骨構造物の耐震補強構造の実施の形態を図により説明する。   Embodiments of the seismic reinforcement structure for steel structures made of H-shaped steel according to the present invention will be described with reference to the drawings.
フランジ2とウェブ3を有するH型鋼からなる鉄骨構造物1は、構造物の柱や梁として用いられる。図1は、ウェブ3の一方の側を補強する実施形態を示す。フランジ2には、所定高さ毎に固定用孔を形成する。また、ウェブ3には、所定高さ毎に前方に伸びる定着部材4の一端を溶接により固定する。定着部材4の固定位置は、フランジ2に形成した固定用孔の位置と異なるようにし、タイロッド等の固定部材と定着部材4が干渉しないようにする。   A steel structure 1 made of an H-shaped steel having a flange 2 and a web 3 is used as a pillar or beam of the structure. FIG. 1 shows an embodiment in which one side of the web 3 is reinforced. A fixing hole is formed in the flange 2 at every predetermined height. Further, one end of a fixing member 4 extending forward at every predetermined height is fixed to the web 3 by welding. The fixing position of the fixing member 4 is different from the position of the fixing hole formed in the flange 2 so that the fixing member such as a tie rod and the fixing member 4 do not interfere with each other.
補強部材5は、鋼板等の強度の大きな材料で形成される。補強部材5の両端には、フランジ2に形成した固定用孔と合致するように所定高さ毎に固定用孔を形成する。図では補強部材5の断面形状をコ字形にしているが、半円形等どのような形状であっても良い。   The reinforcing member 5 is formed of a material having high strength such as a steel plate. At both ends of the reinforcing member 5, fixing holes are formed at predetermined heights so as to match the fixing holes formed in the flange 2. In the drawing, the cross-sectional shape of the reinforcing member 5 is U-shaped, but it may be any shape such as a semicircular shape.
補強部材5の内面には高強度繊維シート6が接着剤を介して配置する高強度繊維シート6の材料をカーボン繊維、アラミド繊維、ポリエチレン繊維及びポリアレート繊維のいずれかとすることで、引張強度の大きな材料で高強度繊維シート6を形成することが可能となる。高強度繊維シート6を補強部材5の内面に配置する作用、効果については後述する。   The material of the high-strength fiber sheet 6 that the high-strength fiber sheet 6 is disposed on the inner surface of the reinforcing member 5 via an adhesive is any one of carbon fiber, aramid fiber, polyethylene fiber, and polyarate fiber, thereby providing high tensile strength. It becomes possible to form the high-strength fiber sheet 6 with a material. Operations and effects of disposing the high-strength fiber sheet 6 on the inner surface of the reinforcing member 5 will be described later.
鉄骨構造物1の補強長さに応じた長さの補強部材5を用意し、内面に高強度繊維シート6を接着剤を介して配置する作業は工場で実施する。現場では、H型鋼からなる鉄骨構造物1のウェブ3に所定間隔毎に定着部材4を溶接により固定する作業と、フランジ2に所定間隔毎に固定孔を削孔する作業を実施する。   The reinforcing member 5 having a length corresponding to the reinforcing length of the steel structure 1 is prepared, and the work of arranging the high-strength fiber sheet 6 on the inner surface with an adhesive is performed at the factory. At the site, an operation of fixing the fixing member 4 to the web 3 of the steel structure 1 made of H-shaped steel by welding at predetermined intervals and an operation of drilling the fixing holes to the flange 2 at predetermined intervals are performed.
H型鋼からなる鉄骨構造物1の一方のフランジ2上に補強部材5の両端の固定用孔がフランジ2に形成した固定用孔の位置と合致するように配置する。補強部材5の固定用孔とフランジ2の固定用孔に両端に雄ネジ部を形成したタイロッド等の固定部材7を挿入する。固定部材7に補強プレート8を配置し、固定部材7の雄ネジ部にナット9を螺着して補強部材5をH型鋼からなる鉄骨構造物1に固定する。補強プレート8は、地震時の変位により固定部が損傷を受けるのを防止する。   It arrange | positions so that the fixing hole of the both ends of the reinforcement member 5 may correspond with the position of the fixing hole formed in the flange 2 on one flange 2 of the steel structure 1 which consists of H-shaped steel. A fixing member 7 such as a tie rod having male screw portions formed at both ends is inserted into the fixing hole of the reinforcing member 5 and the fixing hole of the flange 2. A reinforcing plate 8 is disposed on the fixing member 7, and a nut 9 is screwed onto the male screw portion of the fixing member 7 to fix the reinforcing member 5 to the steel structure 1 made of H-shaped steel. The reinforcing plate 8 prevents the fixed part from being damaged due to the displacement during the earthquake.
H型鋼からなる鉄骨構造物1のウェブ3、フランジ2と補強部材5で囲まれた空間に軸方向筋10を配筋する。必要に応じて軸方向筋10に副筋を配筋しても良い。   The axial reinforcement 10 is arranged in the space surrounded by the web 3, the flange 2 and the reinforcing member 5 of the steel structure 1 made of H-shaped steel. You may arrange a secondary muscle in the axial direction muscle 10 as needed.
H型鋼からなる鉄骨構造物1のウェブ3、フランジ2と補強部材5で囲まれた空間にグラウト等の固化材を充填し、養生して固化させ、H型鋼からなる鉄骨構造物1と補強部材5を一体化し、H型鋼からなる鉄骨構造物1の耐震補強構造とする。   The space surrounded by the web 3 of the steel structure 1 made of H-shaped steel, the flange 2 and the reinforcing member 5 is filled with a solidifying material such as grout, cured and solidified, and the steel structure 1 made of H-shaped steel and the reinforcing member 5 is integrated into a seismic reinforcement structure for the steel structure 1 made of H-shaped steel.
補強部材5の内側に配置した高強度繊維シート6は、環境下に曝されることが無いので劣化が防止され、地震エネルギーの減衰性能、引張強度の向上性能を維持することが可能となる。   Since the high-strength fiber sheet 6 disposed inside the reinforcing member 5 is not exposed to the environment, deterioration is prevented, and it is possible to maintain seismic energy attenuation performance and tensile strength improvement performance.
H型鋼からなる鉄骨構造物1のウェブ3、フランジ2と補強部材5で囲まれた空間に配置される定着部材4、軸方向筋10は、固化材と一体化しH型鋼からなる鉄骨構造物1の耐震性能を向上させる。   The web 3 of the steel structure 1 made of H-shaped steel, the fixing member 4 disposed in the space surrounded by the flange 2 and the reinforcing member 5, and the axial streak 10 are integrated with the solidification material and are made of the H-shaped steel. Improve the earthquake resistance performance.
図2は、ウェブ3の両方の側を補強する実施形態を示し、図3は、図2のA−A線切断面図である。ウェブ3を挟んだ両側のフランジ2には、所定高さ毎に固定用孔を形成する。また、ウェブ3の両側に所定高さ毎に前方に伸びる定着部材4の一端を溶接により固定する。定着部材4の固定位置は、フランジ2に形成した固定用孔の位置と異なるようにし、タイロッド等の固定部材と定着部材4が干渉しないようにする。   FIG. 2 shows an embodiment in which both sides of the web 3 are reinforced, and FIG. 3 is a sectional view taken along line AA of FIG. Fixing holes are formed at predetermined heights on the flanges 2 on both sides of the web 3. Further, one end of the fixing member 4 extending forward at every predetermined height is fixed to both sides of the web 3 by welding. The fixing position of the fixing member 4 is different from the position of the fixing hole formed in the flange 2 so that the fixing member such as a tie rod and the fixing member 4 do not interfere with each other.
補強部材5は、鋼板等の強度の大きな材料で形成される。補強部材5の両端には、フランジ2に形成した固定用孔と合致するように所定高さ毎に固定用孔を形成する。図では補強部材5の断面形状をコ字形にしているが、半円形等どのような形状であっても良い。   The reinforcing member 5 is formed of a material having high strength such as a steel plate. At both ends of the reinforcing member 5, fixing holes are formed at predetermined heights so as to match the fixing holes formed in the flange 2. In the drawing, the cross-sectional shape of the reinforcing member 5 is U-shaped, but it may be any shape such as a semicircular shape.
補強部材5の内面には高強度繊維シート6が接着剤を介して配置する高強度繊維シート6の材料をカーボン繊維、アラミド繊維、ポリエチレン繊維及びポリアレート繊維のいずれかとすることで、引張強度の大きな材料で高強度繊維シート6を形成することが可能となる。   The material of the high-strength fiber sheet 6 that the high-strength fiber sheet 6 is disposed on the inner surface of the reinforcing member 5 via an adhesive is any one of carbon fiber, aramid fiber, polyethylene fiber, and polyarate fiber, thereby providing high tensile strength. It becomes possible to form the high-strength fiber sheet 6 with a material.
ウェブ3を挟んだ両側のフランジ2に図1に示される実施形態と同様な手順で補強部材5を固定し、軸方向筋10を配筋し、H型鋼からなる鉄骨構造物1のウェブ3、フランジ2と補強部材5で囲まれた空間にグラウト等の固化材を充填し、養生して固化させ、H型鋼からなる鉄骨構造物1と補強部材5を一体化し、H型鋼からなる鉄骨構造物1の耐震補強構造とする。   The reinforcing member 5 is fixed to the flanges 2 on both sides of the web 3 in the same manner as in the embodiment shown in FIG. 1, the axial reinforcement 10 is arranged, the web 3 of the steel structure 1 made of H-shaped steel, A space surrounded by the flange 2 and the reinforcing member 5 is filled with a solidifying material such as grout, cured and solidified, and the steel structure 1 made of H-shaped steel and the reinforcing member 5 are integrated to form a steel structure made of H-shaped steel. 1 seismic reinforcement structure.
以上のように、本発明のH型鋼からなる鉄骨構造物の耐震補強構造によれば、構造が簡単で組み立て作業が容易で、狭い作業空間での作業も容易にでき、充填するグラウト材の量も大幅に減らすことができ、地震エネルギーの減衰、引張強度の向上に寄与する高強度繊維シートの劣化を防止することが可能となる。   As described above, according to the seismic reinforcement structure for steel structures made of H-shaped steel according to the present invention, the structure is simple, the assembly work is easy, the work in a narrow work space can be easily performed, and the amount of grout material to be filled Therefore, it is possible to prevent the deterioration of the high-strength fiber sheet that contributes to the attenuation of the seismic energy and the improvement of the tensile strength.
1:鉄骨構造物、2:フランジ、3:ウェブ、4:定着部材、5:補強部材、6:高強度繊維シート、7:固定部材、8:補強プレート、9:ナット、10:軸方向筋   1: Steel structure, 2: Flange, 3: Web, 4: Fixing member, 5: Reinforcing member, 6: High strength fiber sheet, 7: Fixing member, 8: Reinforcing plate, 9: Nut, 10: Axial streak

Claims (4)

  1. 固定用孔を形成したフランジと両フランジ間を連結するウェブを有するH型鋼からなる鉄骨構造物と、
    内面に高強度繊維シートを配置し、両端に固定用孔を形成しフランジ、ウェブとの間に閉じた空間を形成する補強部材と、
    補強部材の両端の固定用孔とフランジに形成した固定用孔に挿入して補強部材をH型鋼からなる鉄骨構造物に固定する固定部材と、
    補強部材とフランジ、ウェブとの間の閉じた空間に充填される固化材と、
    を備えることを特徴とするH型鋼からなる鉄骨構造物の耐震補強構造。
    A steel structure made of H-shaped steel having a flange formed with a fixing hole and a web connecting the two flanges;
    A reinforcing member that arranges a high-strength fiber sheet on the inner surface, forms fixing holes at both ends, and forms a closed space between the flange and the web;
    A fixing member that is inserted into fixing holes at both ends of the reinforcing member and fixing holes formed in the flange and fixes the reinforcing member to the steel structure made of H-shaped steel;
    A solidified material filled in a closed space between the reinforcing member, the flange, and the web;
    An anti-seismic reinforcement structure for a steel structure made of H-shaped steel.
  2. 一端をウェブに溶着される定着部材を備えることを特徴とする請求項1に記載のH型鋼からなる鉄骨構造物の耐震補強構造。   The seismic reinforcement structure for a steel structure made of H-shaped steel according to claim 1, further comprising a fixing member having one end welded to the web.
  3. 補強部材をウェブの一方の側のフランジ又はウェブの両方の側のフランジに固定することを特徴とする請求項1又は2に記載のH型鋼からなる鉄骨構造物の耐震補強構造。   The seismic reinforcement structure for steel structure comprising H-shaped steel according to claim 1 or 2, wherein the reinforcing member is fixed to a flange on one side of the web or a flange on both sides of the web.
  4. フランジと補強部材の固定部に補強プレートを配置することを特徴とする請求項1ないし3のいずれか1項に記載のH型鋼からなる鉄骨構造物の耐震補強構造。   4. A seismic reinforcement structure for steel structure made of H-shaped steel according to any one of claims 1 to 3, wherein a reinforcement plate is disposed at a fixed portion between the flange and the reinforcement member.
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