JP2017030816A - Brace reinforcement structure - Google Patents

Brace reinforcement structure Download PDF

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JP2017030816A
JP2017030816A JP2015153325A JP2015153325A JP2017030816A JP 2017030816 A JP2017030816 A JP 2017030816A JP 2015153325 A JP2015153325 A JP 2015153325A JP 2015153325 A JP2015153325 A JP 2015153325A JP 2017030816 A JP2017030816 A JP 2017030816A
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brace
exterior body
support column
support
rod
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JP6622996B2 (en
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修弘 久部
Sanehiro Kube
修弘 久部
悠三 三橋
Yuzo Mitsuhashi
悠三 三橋
泰聰 長谷川
Hiroaki Hasegawa
泰聰 長谷川
忠史 金子
Tadashi Kaneko
忠史 金子
史也 清水
Fumiya Shimizu
史也 清水
健作 中谷
Kensaku Nakatani
健作 中谷
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Mitsubishi Chemical Engineering Corp
Mitsubishi Plastics Infratec Co Ltd
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Mitsubishi Chemical Engineering Corp
Mitsubishi Plastics Infratec Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To attain the practical use of a new reinforcement technique which substitutes for a reinforcement method using fire to obtain an equal reinforcement effect with the same, and to facilitate execution in a simple structure when a brace is to be reinforced for supporting an existing structure such as a spherical tank.SOLUTION: Connection parts of braces 4 attached in cross shape between a pole 3 and a pole 3 with the poles 3 are provided with rod attachment members 63, 64, 73, 74, and end parts of rods 8 arranged in an X shape in parallel with the braces 4 on both sides of the braces 4 are attached integrally respectively with the rod attachment members 63, 64 provided in connection parts of top end parts of the braces 8 with the poles 3 and the rod attachment members 73, 74 provided in connection parts of bottom end parts with the poles 3 to give the braces 4 tension.SELECTED DRAWING: Figure 3

Description

本発明は、圧縮ガスや液化ガスなどの貯槽として使用される球形タンクやその他の構造物の耐震性を高めるために、構造物を支持する脚部のブレースを補強する構造に関する。   The present invention relates to a structure that reinforces braces of leg portions that support a structure in order to increase the earthquake resistance of a spherical tank or other structure that is used as a storage tank for compressed gas or liquefied gas.

既設の球形タンクの支柱のブレースを補強する構造として、半割円筒管を組み合わせてなる円筒支持部材をブレースと支柱の外周面に装着して溶接一体化し、ブレースと支柱の外周を円筒支持部材で覆う構成のものや、ブレースが交差した部分に補強プレートを差し込み、これを交差部に溶接して固着する構成のものが知られている（例えば特許文献１，２参照）。   As a structure to reinforce the brace of the existing spherical tank column, a cylindrical support member composed of a split cylindrical tube is attached to the outer periphery of the brace and the column and welded together, and the outer periphery of the brace and column is formed by the cylindrical support member. A covering structure and a structure in which a reinforcing plate is inserted into a portion where the braces intersect and are welded and fixed to the intersecting portion are known (see, for example, Patent Documents 1 and 2).

特開２０１１−１８４０５６号公報JP 2011-184056 A 特開２０１３−１５４９３２号公報JP2013-154932A

先の大震災で高圧ガスが充填された球形タンクのブレースが損傷し、球形タンクの倒壊や火災爆発事故が発生したことを受けて、国から既設の球形タンクのブレースの耐震補強方法が通達されている。その通達で示されている補強方法は、ブレースがＸ字状に交差した部分や支柱と接続した部分に補強材を溶接して一体に固着するものであり、前記従来の補強構造はこれに則った構成のものといえる。   In response to the damage of the spherical tank brace filled with high-pressure gas due to the previous great earthquake and the collapse of the spherical tank and the fire explosion accident, the government has issued an earthquake-proof reinforcement method for the existing spherical tank brace. Yes. The reinforcing method shown in the notification is to weld the reinforcing material to the part where the braces intersected in an X-shape or the part connected to the support, and to fix them together, and the conventional reinforcing structure conforms to this. It can be said that it is the thing of the composition.

然し乍ら、従来の補強構造と前記通達で示された補強方法は、何れも補強材の固着に火気を使用するため工事の際に充填されていたガスを抜き取ってタンクを空にしておく必要があり、また、ブレースや支柱を切断して補強材を外付けするものであるため難易度の高い改造工事となり、工期が長期化すること及び施工コストが高くなることは避けられない。
既設の球形タンクのブレースを含む脚部を耐震補強することは急務であるが、前記火気を使用する補強方法と同等の補強効果が得られ、且つより短い工期で施工可能な補強構造が実現できれば実用上好ましい。 However, both the conventional reinforcing structure and the reinforcing method shown in the above notification require that the tank is emptied by extracting the gas filled during construction because fire is used to fix the reinforcing material. In addition, since the bracing and supporting columns are cut and the reinforcing material is externally attached, the remodeling work has a high degree of difficulty, and it is inevitable that the construction period is prolonged and the construction cost is increased.
It is urgent to seismically reinforce the legs including the braces of existing spherical tanks, but if a reinforcing structure equivalent to the reinforcing method using fire can be obtained and construction that can be performed in a shorter construction period can be realized. Practically preferred.

本発明は従来技術の有するこのような問題点に鑑み、球形タンクなどの既設の構造物を支持する支柱のブレースを補強するにあたり、火気を使用する補強方法に代えて、これと同等の補強効果が得られ且つシンプルな構造で施工がし易い新たな補強手法の実用化を図ることを課題とする。   In view of such problems of the prior art, the present invention replaces a reinforcing method using fire in reinforcing a brace of a column that supports an existing structure such as a spherical tank, and has the same reinforcing effect. It is an object of the present invention to realize a new reinforcing method that is easy to construct with a simple structure.

前記課題を解決するため本発明は、構造物を支持する支柱と支柱の間にＸ字形に取り付けられるブレースを補強する構造において、
ブレースの上端部と支柱との接続部にブレースと支柱の外周面を一体に覆う上側外装体、ブレースの下端部と支柱との接続部にブレースと支柱の外周面を一体に覆う下側外装体がそれぞれ取り付けられ、
ブレースの左右両側に当該ブレースの上下端部間に沿って平行にロッドがそれぞれ配置され、
それぞれのロッドの上下端部が上側外装体と下側外装体に接続された構成を有することを特徴とする。 In order to solve the above problems, the present invention provides a structure for reinforcing a brace attached in an X shape between a column supporting a structure and the column,
Upper exterior body that integrally covers the outer peripheral surface of the brace and the support post at the connection portion between the upper end portion of the brace and the support column, and a lower exterior body that integrally covers the outer periphery surface of the brace and the support at the connection portion between the lower end portion of the brace and the support column. Each is attached,
Rods are arranged in parallel on the left and right sides of the brace along the upper and lower ends of the brace,
The upper and lower ends of each rod are connected to the upper exterior body and the lower exterior body.

前記のブレースの補強構造において、ロッドは炭素繊維強化プラスチックからなるロッドの使用が好適である。
また、ブレースの上下端部と支柱との接続部に取り付ける外装体は、支柱及びブレースの外周面と外装体の内周面の間に膨張モルタルが充填されて、外装体が支柱及びブレースに固着されるように設けられていることが好ましい。 In the brace reinforcing structure, it is preferable to use a rod made of carbon fiber reinforced plastic.
The exterior body attached to the connection part between the upper and lower ends of the brace and the support column is filled with expansion mortar between the outer peripheral surface of the support column and the brace and the inner peripheral surface of the exterior body, and the exterior body is fixed to the support column and the brace. It is preferable to be provided.

また、本発明のブレースの補強構造は、構造物を支持する支柱と支柱の間にＸ字形に取り付けられたブレースの支柱との接続部にロッド取り付け部材を設け、ブレースの上端部と支柱との接続部に設けられたロッド取り付け部材とブレースの下端部と支柱との接続部に設けられたロッド取り付け部材に、ブレースの両側でブレースと平行にＸ字形に配置されたロッドの端部をそれぞれ一体に取り付けて、ブレースに張力が与えられるように構成されたことを特徴とする。   In the brace reinforcing structure of the present invention, a rod attachment member is provided at a connection portion between the support column supporting the structure and the support column of the brace attached in an X shape between the support column, and the upper end of the brace and the support column are connected. The rod attachment member provided at the connection part, the rod attachment member provided at the connection part between the lower end of the brace and the support column, and the rod end arranged in an X shape in parallel with the brace on both sides of the brace are integrated respectively. And the brace is configured to be tensioned.

これによれば、ブレースの外側でブレースと平行に配置されたロッドを、その両端部をブレースと支柱との接続部に一体に取り付けてブレースを補強することで、地震発生時の揺れなどで支柱が揺動したときにブレースにかかる外力がこれと平行に取り付けられたロッドに分散されて、ブレース同士の交差部分やブレースと支柱の接続部にかかる応力の増大が抑えられ、これにより前記ブレースの交差部分や支柱との接続部の剛性が高められて変形や破損が生じ難くなり、支柱の耐震強度を高めることができる。
また、既設の構造物に対して、ブレースの交差部分などを部分的に切断したり溶接したりする加工は不要であり、火気を使用しないためタンクなどにガスを充填したままで施工が可能であり、工期を長期化することなく低廉な施工コストでブレースを補強することが可能である。 According to this, the rod arranged parallel to the brace outside the brace is attached to both ends of the brace and the brace and the brace to reinforce the brace. The external force applied to the brace when it swings is distributed to the rods attached in parallel to this, and the increase in stress applied to the intersection of the braces and the connection between the braces and the struts is suppressed, thereby The rigidity of the intersection and the connecting portion with the column is increased, so that deformation and breakage hardly occur, and the seismic strength of the column can be increased.
In addition, it is not necessary to cut or weld the intersections of braces, etc., to existing structures, and because it does not use fire, construction can be performed with the tank filled with gas. Yes, it is possible to reinforce braces at a low construction cost without lengthening the construction period.

本発明の補強構造を適用してブレースを補強した球形タンクの脚部の要部外観図である。It is a principal part external view of the leg part of the spherical tank which applied the reinforcement structure of this invention and reinforced the brace. 図１の脚部の要部外観斜視図である。It is a principal part external appearance perspective view of the leg part of FIG. （Ａ）は脚部の外略正面図、（Ｂ）はその概略側面図である。(A) is an external schematic front view of a leg part, (B) is the schematic side view. （Ａ），（Ｂ）は上側外装体を構成する外装部材の表側外観図、平面図及び裏側外観図である。(A) and (B) are the front side external view of the exterior member which comprises an upper exterior body, a top view, and a back side external view. （Ａ），（Ｂ）は下側外装体を構成する外装部材の表側外観図、平面図及び裏側外観図である。(A), (B) is the front side external view of the exterior member which comprises a lower exterior body, a top view, and a back side external view.

本発明の好適な実施の形態を、図面を参照して説明する。
図１は本発明を適用してブレースを補強した球形タンクの脚部を示しており、図中、符号１は高圧ガスが貯蔵される球形タンク、２は球形タンク１を支持する脚部、３，４はそれぞれ脚部２を構成する支柱とブレースである。 Preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a leg of a spherical tank to which a brace is reinforced by applying the present invention. In the figure, reference numeral 1 denotes a spherical tank in which high-pressure gas is stored, 2 denotes a leg for supporting the spherical tank 1, 3 , 4 are struts and braces constituting the leg 2 respectively.

脚部２は、上端部に球形タンク１の外周面に接続してこれを支持する支持部（図示せず）を備えた鋼管からなる支柱３を基礎５上に立設し、隣接する支柱３，３の側面間にＸ字形に組んだ鋼管からなるブレース４,４を一体に取り付けて構成されている。ブレース４，４は、その交差部分と支柱３との接続部をそれぞれブレース４，４同士の接合部及びブレース４の端部と支柱３との接合部を溶接により一体に固着して固定してある。   The leg 2 has a support 3 (not shown), which is connected to the outer peripheral surface of the spherical tank 1 at the upper end and supports the support 3 (not shown). , 3 are configured by integrally attaching braces 4 and 4 made of steel pipes assembled in an X shape between the side surfaces. The braces 4 and 4 are fixed by fixing the joints between the intersections and the columns 3 by welding the joints between the braces 4 and 4 and the joints between the ends of the braces 4 and the columns 3 by welding. is there.

そして、本形態では、ブレース４の上下端部の支柱３との接続部に、それぞれ接続部の外周面を覆う上側外装体６と下側外装体７を取り付け、ブレース４の外側でブレース４と平行に配置したロッド８の両端部を上下の外装体６，７に接続して上下の外装体６，７間にロッド８を張ることで、ブレース４に張力を与えて補強するように構成してある。   And in this form, the upper exterior body 6 and the lower exterior body 7 which cover the outer peripheral surface of a connection part are attached to the connection part with the support | pillar 3 of the upper and lower end part of the brace 4, respectively, Both ends of the rod 8 arranged in parallel are connected to the upper and lower exterior bodies 6 and 7, and the rod 8 is stretched between the upper and lower exterior bodies 6 and 7, so that the brace 4 is tensioned and reinforced. It is.

前記上側外装体６と下側外装体７は、金属を切削した切削品、金属を溶接した溶接品、溶かした金属を鋳物に流し込んで成形される鋳造品などを用いることができ、ともにブレース４と支柱３の接続部の外周面の片方の半面に嵌合する外装部材６Ａ，７Ａと、これと対となってもう片方の半面に嵌合する外装部材６Ｂ，７Ｂからなっており、互いに対となる外装部材６Ａ，６Ｂと外装部材７Ａ，７Ｂをそれぞれブレース４の上下の支柱３との接続部に向かい合わせに嵌め合せて一体に連結することで、接続部の外周面全体を覆って取り付けられるように形成してある。   The upper exterior body 6 and the lower exterior body 7 may be a cut product obtained by cutting a metal, a weld product obtained by welding a metal, a cast product formed by pouring molten metal into a casting, and the like. And the outer member 6A, 7A that fits on one half of the outer peripheral surface of the connecting portion of the support column 3, and the outer member 6B, 7B that fits on the other half of the outer surface. The exterior members 6A and 6B and the exterior members 7A and 7B to be connected to the connection parts of the upper and lower support columns 3 of the brace 4 face each other and are integrally connected to cover the entire outer peripheral surface of the connection parts. It is formed to be.

詳しくは、上側外装体６の外装部材６Ａと外装部材６Ｂは、図４に示されるように、その裏面側に、当該裏面側の中央で適宜な長さで下方へ伸びていて円筒を半割した如き湾曲した断面形状の凹面部６１と、凹面部６１の上部左右両側から分岐して斜め下方へそれぞれ伸びていて同じく円筒を半割した如き湾曲した断面形状の凹面部６２，６２を有し、その表面側であって前記凹面部６２，６２の外側面の部分にロッド取り付け部６３，６４を一体に設けて形成してある。   Specifically, as shown in FIG. 4, the exterior member 6A and the exterior member 6B of the upper exterior body 6 extend downward at an appropriate length at the center of the rear surface side and halve the cylinder. A concave surface portion 61 having a curved cross-sectional shape as described above, and concave surface portions 62 and 62 having a curved cross-sectional shape that diverges from both the left and right sides of the upper portion of the concave surface portion 61 and extends obliquely downward and halves the cylinder. The rod mounting portions 63 and 64 are integrally formed on the outer surface of the concave surface portions 62 and 62 on the surface side.

凹面部６１は、支柱３の外周半面に嵌着するように、その断面内径寸法を支柱３の外径と略同じかそれよりも５〜１５ｍｍ程度大きな寸法に設定し、また、凹面部６２，６２は、ブレース４の外周半面に嵌着するように、その断面内径寸法をブレース４の外径と略同じかそれよりも数ｍｍ大きな寸法に設定してそれぞれ形成されており、各凹面部６１，６２，６２の周辺には各凹面部の湾曲した縁部から外方へ直角に折れて突出したフランジ部６５を一体に設けてある。凹面部６１と凹面部６２，６２の分岐部分の下側にもフランジ部６５を扇状に張り出してある。フランジ部６５の面内には、後述する留めネジ（図示せず）が貫通する複数の通孔６６が、各凹面部６１，６２，６２の縁部に沿って所定の間隔を開けて形成してある。
また、ロッド取り付け部６３，６４は、ともに中央にロッド８の端部が挿通する孔部６３ａ，６４ａを有する筒形をなし、前記凹面部６２，６２の軸方向と孔部６３ａ，６４ａの中心線に沿った方向を平行に揃えて凹面部６２，６２の外側面に一体に設けてある。また、図４中の平面図に示されるように、ロッド取り付け部６３，６４は、凹面部６２の外側面からのロッド取り付け部６３の孔部６３ａまでの間隔（Ｓ１）をロッド取り付け部６４の孔部６４ａまでの間隔（Ｓ２）よりも大きく（Ｓ１＞Ｓ２）設定して形成してある。 The concave surface portion 61 has a cross-sectional inner diameter dimension set to be approximately the same as the outer diameter of the support column 3 or about 5 to 15 mm larger than the outer diameter of the support column 3 so as to be fitted to the outer peripheral half surface of the support column 3. Each of the concave portions 61 is formed so that the inner diameter of the cross section is set to be approximately the same as the outer diameter of the brace 4 or a few mm larger than the outer diameter of the brace 4 so as to be fitted to the outer peripheral half surface of the brace 4. , 62 and 62 are integrally provided with a flange portion 65 which is bent at a right angle outward from the curved edge portion of each concave surface portion and protrudes. A flange portion 65 is also fanned out below the branch portion of the concave surface portion 61 and the concave surface portions 62 and 62. In the surface of the flange portion 65, a plurality of through holes 66 through which a retaining screw (not shown) to be described later passes are formed at predetermined intervals along the edge portions of the respective concave surface portions 61, 62, 62. It is.
The rod attachment portions 63 and 64 are both cylindrical in shape having holes 63a and 64a through which the end portions of the rod 8 are inserted, and the axial directions of the concave surfaces 62 and 62 and the centers of the holes 63a and 64a. The direction along the line is aligned in parallel and is integrally provided on the outer surface of the concave surface portions 62 and 62. Further, as shown in the plan view in FIG. 4, the rod attachment portions 63 and 64 have an interval (S1) from the outer surface of the concave portion 62 to the hole 63a of the rod attachment portion 63. It is formed to be larger (S1> S2) than the interval (S2) to the hole 64a.

また、下側外装体７の外装部材７Ａと外装部材７Ｂも、上側外装体６の外装部材６Ａと外装部材６Ｂと同様に形成してある。すなわち、図５に示されるように、外装部材７Ａと外装部材７Ｂは、その裏面側に、当該裏面側の中央で適宜な長さで上方へ伸びていて円筒を半割した如き湾曲した断面形状の凹面部７１と、凹面部７１の上部左右両側から分岐して斜め上方へそれぞれ伸びていて同じく円筒を半割した如き湾曲した断面形状の凹面部７２，７２を有し、その表面側であって前記凹面部７２，７２の外側面の部分にロッド取り付け部７３，７４を一体に設けて形成してある。   The exterior member 7A and the exterior member 7B of the lower exterior body 7 are also formed in the same manner as the exterior member 6A and the exterior member 6B of the upper exterior body 6. That is, as shown in FIG. 5, the exterior member 7A and the exterior member 7B have curved cross-sectional shapes that extend upward at an appropriate length at the center of the rear surface side and halve the cylinder. The concave surface portion 71 and the concave surface portions 72 and 72 which are branched from both the left and right sides of the upper portion of the concave surface portion 71 and extend obliquely upward and have a curved cross-sectional shape like a half of a cylinder are also formed on the surface side. The rod mounting portions 73 and 74 are integrally formed on the outer surface portions of the concave surface portions 72 and 72.

凹面部７１は、その断面内径寸法を支柱３の外径と略同じかそれよりも数ミリ大きい寸法に設定し、凹面部７２，７２は、その断面内径寸法をブレース４の外径と略同じかそれよりも数ミリ大きい寸法に設定してそれぞれ形成されているとともに、各凹面部７１，７２，７２の周辺には各凹面部の湾曲した縁部から外方へ直角に折れて突出したフランジ部７５を一体に設けて形成され、さらに、凹面部７１と凹面部７２，７２の分岐部分の上側にもフランジ部７５を扇状に張り出してある。フランジ部７５の面内には、留めネジが貫通する複数の通孔７６が、各凹面部７１，７２，７２の縁部に沿って所定の間隔を開けて形成してある。また、凹面部７１の下部表面側にも、基礎５の上面に重なるフランジ部７５を設けてある。
また、ロッド取り付け部７３，７４は、上側外装体６のロッド取り付け部６３，６４と同様に、ともに中央にロッド８の端部が挿通する孔部７３ａ，７４ａを有する筒形をなし、前記凹面部７２，７２の軸方向と孔部７３ａ，７４ａの中心線に沿った方向を平行に揃えて凹面部７２，７２の外側面に一体に設けてある。また、図５中の平面図に示されるように、凹面部７２の外側面からのロッド取り付け部７３の孔部７３ａまでの間隔（Ｓ１）をロッド取り付け部７４の孔部７４ａまでの間隔（Ｓ２）よりも大きく（Ｓ１＞Ｓ２）設定して形成してある。 The concave surface portion 71 has a cross-sectional inner diameter dimension set to be substantially the same as the outer diameter of the support column 3 or a few millimeters larger than that, and the concave surface portions 72 and 72 have a cross-sectional inner diameter dimension substantially equal to the outer diameter of the brace 4. A flange that is formed to have a size of several millimeters larger than that, and is formed around each concave surface portion 71, 72, 72 by bending outward from the curved edge portion of each concave surface portion at a right angle. The flange portion 75 is formed in a fan shape on the upper side of the branch portion of the concave surface portion 71 and the concave surface portions 72 and 72. In the surface of the flange portion 75, a plurality of through holes 76 through which the retaining screw passes are formed at predetermined intervals along the edges of the concave surface portions 71, 72, 72. Further, a flange portion 75 that overlaps the upper surface of the foundation 5 is also provided on the lower surface side of the concave surface portion 71.
Also, the rod attachment portions 73 and 74 have a cylindrical shape having hole portions 73a and 74a through which the end portions of the rod 8 are inserted in the center, similarly to the rod attachment portions 63 and 64 of the upper exterior body 6, and the concave surface. The axial directions of the portions 72 and 72 and the direction along the center line of the holes 73a and 74a are aligned in parallel and are provided integrally on the outer surface of the concave portions 72 and 72. Further, as shown in the plan view of FIG. 5, the distance (S1) from the outer surface of the concave portion 72 to the hole 73a of the rod attachment portion 73 is the distance (S2) to the hole 74a of the rod attachment portion 74. ) Larger than (S1> S2).

上下の外装体６，７間に架設するロッド８は、引っ張り強度及び弾性率が高い、炭素繊維強化プラスチック製のものの使用が好適であるが、設計上要求される強度や弾性率を備えた他の繊維強化素材のものを用いてもよい。使用するロッド８の太さ、本数などは、補強するブレース４の寸法などに応じて適宜に選定される。   The rod 8 installed between the upper and lower exterior bodies 6 and 7 is preferably made of carbon fiber reinforced plastic having high tensile strength and elastic modulus, but has other strength and elastic modulus required in design. The fiber reinforced material may be used. The thickness and number of rods 8 to be used are appropriately selected according to the dimensions of the brace 4 to be reinforced.

前記構成の上下の外装体６，７とロッド８は、既設の球形タンク１の脚部２に対して、以下のようにして一体に取り付けられる。   The upper and lower exterior bodies 6, 7 and the rod 8 having the above-described configuration are integrally attached to the legs 2 of the existing spherical tank 1 as follows.

先ず、上側外装体６は、ブレース４の上端部と支柱３との接続部の表面に、その内外両側から外装部材６Ａと外装部材６Ｂを嵌め合せて、両外装部材６Ａ，６Ｂで接続部を挟み込み、互いのフランジ部６５，６５に形成された通孔６６，６６にボルトなどの留めネジを挿通し、且つ貫通したネジ端部にナットを締め付けて固定する。
同様に、下側外装体７は、基礎５の上方のブレース４の下端部と支柱３との接続部の表面に、その内外両側から外装部材７Ａと外装部材７Ｂを嵌め合せて、両外装部材７Ａ，７Ｂで接続部を挟み込み、互いのフランジ部７５，７５に形成された通孔７６，７６に留めネジを挿通し、且つ貫通したネジ端部にナットを締め付けて固定する。 First, the upper exterior body 6 is fitted on the surface of the connection portion between the upper end portion of the brace 4 and the support column 3 from the inner and outer sides of the exterior member 6A and the exterior member 6B, and the connection portion is formed by both the exterior members 6A and 6B. The pin is sandwiched, a fastening screw such as a bolt is inserted into the through holes 66 and 66 formed in the flange portions 65 and 65, and a nut is fastened and fixed to the threaded end portion that penetrates.
Similarly, the lower exterior body 7 is formed by fitting the exterior member 7A and the exterior member 7B on the surface of the connecting portion between the lower end portion of the brace 4 above the foundation 5 and the support column 3 from both the inside and outside thereof. The connecting portion is sandwiched between 7A and 7B, a fastening screw is inserted into the through holes 76 and 76 formed in the flange portions 75 and 75, and a nut is fastened and fixed to the threaded end portion that penetrates.

次いで、前記接続部に取り付けられた上下の外装体６，７の凹面部６１，７１の内面と支柱３の外周面との間及び凹面部６２，６２，７２，７２の内面とブレース４の内周面との間に膨張モルタルを充填し、これを固化させて上下の外装体６，７を支柱３及びブレース４に一体に固着する。   Next, between the inner surfaces of the concave surface portions 61, 71 of the upper and lower exterior bodies 6, 7 attached to the connection portion and the outer peripheral surface of the support column 3, and the inner surfaces of the concave surface portions 62, 62, 72, 72 and the brace 4 The expansion mortar is filled between the peripheral surface and solidified to fix the upper and lower exterior bodies 6 and 7 to the support column 3 and the brace 4 integrally.

そして、一の支柱３に固定された上側外装体６のロッド取り付け部６３，６４と、これに隣接した支柱３に固定された下側外装体７のロッド取り付け部７３，７４との間にロッド８を架設する。
ロッド８の架設は、前記隣接する支柱３，３間に取り付けられたブレース４の上下端部の接続部で、ブレース４に沿ってその外側で互いに向き合うように配置された上側外装体６のロッド取り付け部６３の孔部６３ａ又はロッド取り付け部６４の孔部６４ａと、下側外装体７のロッド取り付け部７３の孔部７３ａ又はロッド取り付け部７４の孔部７４ａにロッド８の端部をそれぞれ通し、ロッド８にテンションを与えた状態で各ロッド取り付け部にロッド８の端部を固定することにより行われ、これにより、支柱３，３の間にＸ字形に取り付けられたブレース４の内側と外側で、ロッド８がブレース４と平行にＸ字形に支柱３，３間に配置されて固定される。 Then, the rod is fixed between the rod mounting portions 63 and 64 of the upper exterior body 6 fixed to the one support column 3 and the rod mounting portions 73 and 74 of the lower exterior body 7 fixed to the support column 3 adjacent thereto. 8 is installed.
The rod 8 is constructed by connecting the upper and lower ends of the brace 4 attached between the adjacent columns 3 and 3, and the rod of the upper exterior body 6 arranged along the brace 4 so as to face each other on the outside. The end portion of the rod 8 is passed through the hole portion 63a of the attachment portion 63 or the hole portion 64a of the rod attachment portion 64 and the hole portion 73a of the rod attachment portion 73 of the lower exterior body 7 or the hole portion 74a of the rod attachment portion 74, respectively. The end of the rod 8 is fixed to each rod mounting portion in a state where tension is applied to the rod 8, whereby the inside and outside of the brace 4 attached in an X shape between the support columns 3 and 3. Then, the rod 8 is arranged between the support columns 3 and 3 in an X shape parallel to the brace 4 and fixed.

本形態の補強構造によれば、ブレース４の外側でブレース４と平行に配置されたロッド８を、その両端部をブレース４と支柱３との接続部に固着した上下の外装体６，７に一体に取り付けてブレース４を補強してあるので、地震発止時の揺れなどで支柱が揺動したときにブレース４にかかる外力がこれと平行に取り付けられたロッド８に分散されて、ブレース４同士の交差部分やブレース４と支柱３の接続部にかかる応力の増大が抑えられ、これにより前記ブレース４の交差部分や支柱３との接続部の変形や破損が生じ難くなって脚部２の耐震強度を高めることができる。
また、既設の構造物に対して、煩雑な加工や火気を用いることなく施工可能であり、工期を長期化することなく低廉な施工コストでブレース４を補強することが可能である。 According to the reinforcing structure of the present embodiment, the rod 8 arranged parallel to the brace 4 on the outside of the brace 4 is attached to the upper and lower exterior bodies 6, 7 having both end portions fixed to the connecting portion between the brace 4 and the column 3. Since the brace 4 is reinforced by attaching it integrally, the external force applied to the brace 4 when the column swings due to shaking at the time of the earthquake stop is distributed to the rod 8 attached in parallel to the brace 4. An increase in stress applied to the intersection between the braces 4 and the connection portion between the brace 4 and the support column 3 is suppressed, thereby making it difficult for deformation and breakage of the intersection between the brace 4 and the connection portion with the support column 3 to occur. Seismic strength can be increased.
Moreover, it is possible to construct an existing structure without using complicated processing and fire, and the brace 4 can be reinforced at a low construction cost without lengthening the construction period.

なお、図示した上下の外装体６，７の形態は一例であり、本発明はこれに限定されず、他の適宜な形態で構成することが可能である。外装体６，７とは異なる形状の部材を用いて、或いは支柱３とブレース４の接続部に直にロッド取り付け部６３，６４，７３，７４を取り付けるようにしてもよい。
また、本発明は筋交いであるブレースを支柱に取り付け構成される脚部を備えた、球形タンク以外の既設の構造物に脚部の補強に適用が可能である。 In addition, the form of the upper and lower exterior bodies 6 and 7 illustrated is an example, and the present invention is not limited to this, and can be configured in other appropriate forms. The rod attachment parts 63, 64, 73, 74 may be attached directly to the connecting part between the support column 3 and the brace 4 using a member having a shape different from that of the exterior bodies 6, 7.
In addition, the present invention can be applied to the reinforcement of the leg portion in an existing structure other than the spherical tank provided with the leg portion configured to attach braces that are braces to the support column.

１ 球形タンク、２ 脚部、３ 支柱、４ ブレース、５ 基礎、６ 上側外装体、６Ａ，６Ｂ 外装部材、６３，６４ ロッド取り付け部、７ 下側外装体、７Ａ，７Ｂ 外装部材、７３，７４ ロッド取り付け部、８ ロッド

DESCRIPTION OF SYMBOLS 1 Spherical tank, 2 leg part, 3 support | pillar, 4 brace, 5 foundation, 6 upper exterior body, 6A, 6B exterior member, 63,64 rod attachment part, 7 lower exterior body, 7A, 7B exterior member, 73,74 Rod mounting part, 8 rod

Claims (4)

構造物を支持する支柱と支柱の間に取り付けられるブレースを補強する構造において、
ブレースの上端部と支柱との接続部にブレースと支柱の外周面を一体に覆う上側外装体、ブレースの下端部と支柱との接続部にブレースと支柱の外周面を一体に覆う下側外装体がそれぞれ取り付けられ、
ブレースの左右両側に当該ブレースの上下端部間に沿って平行にロッドがそれぞれ配置され、
それぞれのロッドの上下端部が上側外装体と下側外装体に接続された構成を有することを特徴とするブレースの補強構造。 In the structure that reinforces the brace attached between the column and the column that supports the structure,
Upper exterior body that integrally covers the outer peripheral surface of the brace and the support post at the connection portion between the upper end portion of the brace and the support column, and a lower exterior body that integrally covers the outer periphery surface of the brace and the support at the connection portion between the lower end portion of the brace and the support column. Each is attached,
Rods are arranged in parallel on the left and right sides of the brace along the upper and lower ends of the brace,
A brace reinforcing structure comprising upper and lower ends of each rod connected to an upper exterior body and a lower exterior body. 炭素繊維強化プラスチックからなるロッドを用いてなる請求項１に記載のブレースの補強構造。   The brace reinforcing structure according to claim 1, wherein a rod made of carbon fiber reinforced plastic is used. 支柱及びブレースの外周面と外装体の内周面の間に膨張モルタルが充填されて外装体が支柱及びブレースに固着された構成を有することを特徴とする請求項１又は２に記載のブレースの補強構造。   3. The brace according to claim 1, wherein an expansion mortar is filled between an outer peripheral surface of the support and the brace and an inner peripheral surface of the exterior body, and the exterior body is fixed to the support and the brace. Reinforced structure. 構造物を支持する支柱と支柱の間にＸ字形に取り付けられたブレースの支柱との接続部にロッド取り付け部材を設け、ブレースの上端部と支柱との接続部に設けられたロッド取り付け部材とブレースの下端部と支柱との接続部に設けられたロッド取り付け部材に、ブレースの両側でブレースと平行にＸ字形に配置されたロッドの端部をそれぞれ一体に取り付けて、ブレースに張力が与えられるように構成されたことを特徴とするブレースの補強構造。
A rod attachment member is provided at the connection portion between the support column supporting the structure and the support column of the brace attached in an X shape between the support columns, and the rod attachment member and brace provided at the connection portion between the upper end of the brace and the support column. The rod attachment member provided at the connecting part between the lower end of the brace and the support column is attached to the ends of the rods arranged in an X shape in parallel with the brace on both sides of the brace, so that tension can be applied to the brace. A brace reinforcement structure characterized by being configured in the above.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5324623A (en) * 1976-08-19 1978-03-07 Nippon Oil Co Ltd Method of reinforcing bracing members for spherical tanks and reinforced bracing members therefor
JPH09242373A (en) * 1996-03-06 1997-09-16 Kokichi Yamamoto Collapse preventive structure of wooden building
JPH10292636A (en) * 1997-04-15 1998-11-04 Taisei Corp Structure reinforcing brace of existing building
JP2004036219A (en) * 2002-07-03 2004-02-05 Sangaku Renkei Kiko Kyushu:Kk Reinforcing material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5324623A (en) * 1976-08-19 1978-03-07 Nippon Oil Co Ltd Method of reinforcing bracing members for spherical tanks and reinforced bracing members therefor
JPH09242373A (en) * 1996-03-06 1997-09-16 Kokichi Yamamoto Collapse preventive structure of wooden building
JPH10292636A (en) * 1997-04-15 1998-11-04 Taisei Corp Structure reinforcing brace of existing building
JP2004036219A (en) * 2002-07-03 2004-02-05 Sangaku Renkei Kiko Kyushu:Kk Reinforcing material

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