JP4178102B2 - Seismic reinforcement method for steel pipe columns - Google Patents

Seismic reinforcement method for steel pipe columns Download PDF

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JP4178102B2
JP4178102B2 JP2003426122A JP2003426122A JP4178102B2 JP 4178102 B2 JP4178102 B2 JP 4178102B2 JP 2003426122 A JP2003426122 A JP 2003426122A JP 2003426122 A JP2003426122 A JP 2003426122A JP 4178102 B2 JP4178102 B2 JP 4178102B2
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steel pipe
pipe column
hole
filler
seismic reinforcement
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JP2005180128A (en
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規和 浅井
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トヨタＴ＆Ｓ建設株式会社
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Description

本発明は、例えば建築物、高架橋、高架道路などの鋼管柱の耐震補強方法に関する。   The present invention relates to a seismic reinforcement method for steel pipe columns such as buildings, viaducts, and elevated roads.

従来、前記のような鋼管柱において、既設の鋼管柱に、壁やブレースを用いず平面計画に変更なしで耐震補強をする方法として、図３に示すように、鋼管柱１０１の外側に溶接１０３により鉄板１０２を余分に接合したり、また、鋼管柱の外回りにコンクリートを打設して巻くものが知られている。   Conventionally, in a steel pipe column as described above, as a method of seismic reinforcement without changing a plane plan without using a wall or brace, an existing steel pipe column is welded 103 to the outside of the steel pipe column 101 as shown in FIG. It is known that the steel plate 102 is joined excessively by the above, or concrete is wound around the outer periphery of the steel pipe column.

前記従来の鉄板を溶接により接合する方法においては、新旧の鉄板の接合具合に難がある上に溶接そのものの品質確保の問題があり、更には溶接工の確保も難しく、現場で火を使う危険性もあり、溶接熱の影響も心配となる。   In the conventional method of joining the steel plates by welding, there is a difficulty in joining the old and new steel plates, there is a problem of ensuring the quality of the welding itself, and it is also difficult to secure the welder, and there is a danger of using fire on site There are also concerns about the effects of welding heat.

また、前記外回りにコンクリートを打設するものにおいては、柱自体がかなり大きくなり、平面計画にかなりの影響を及ぼす問題がある。
そこで本発明は前記の問題を解決する鋼管柱の耐震補強方法を提供することを目的とするものである。 In addition, in the case of placing concrete around the outside, the pillar itself becomes considerably large, which has a problem of having a considerable influence on the floor plan.
Accordingly, an object of the present invention is to provide a method for seismic reinforcement of a steel pipe column that solves the above-mentioned problems.

本発明は前記の課題を解決するために、請求項１記載の発明は、既設の鋼管柱に穴を穿設し、該穴から鋼管柱内に充填材を充填し、該鋼管柱の外周面に帯材を螺旋状に巻設することを特徴とするものである。 In order to solve the above-mentioned problems, the present invention is characterized in that a hole is formed in an existing steel pipe column, a filler is filled into the steel pipe column from the hole, and an outer peripheral surface of the steel pipe column is provided. It is characterized in that the strip is wound in a spiral shape .

請求項２記載の発明は、既設の鋼管柱の側壁上部に上部穴を穿設し、側壁下部に下部穴を穿設し、その下部穴から充填材を鋼管柱内に充填し、鋼管柱の外周面に螺旋状に帯材を巻設することを特徴とするものである。 According to the second aspect of the present invention, an upper hole is formed in the upper part of the side wall of the existing steel pipe column, a lower hole is formed in the lower part of the side wall, and a filler is filled into the steel pipe column from the lower hole. A band material is wound around the outer peripheral surface in a spiral shape .

請求項３記載の発明は、既設の鋼管柱の側壁上部に穴を穿設し、該穴から鋼管柱内に充填材を充填し、該鋼管柱の外周面に螺旋状に帯材を巻設することを特徴とするものである。 According to a third aspect of the present invention, a hole is formed in an upper portion of a side wall of an existing steel pipe column, a filler is filled into the steel pipe column from the hole, and a strip is wound spirally around the outer peripheral surface of the steel pipe column. It is characterized by doing.

請求項４記載の発明は、請求項１又は２又は３記載の発明において、前記充填材として、発泡系充填剤または軽量コンクリートを用いることを特徴とするものである。   A fourth aspect of the invention is characterized in that, in the invention of the first, second, or third aspect, a foamed filler or lightweight concrete is used as the filler.

請求項５記載の発明は、請求項１乃至４のいずれか１項に記載の発明において、前記帯材として、炭素繊維またはアラミド繊維またはポリエステル繊維またはガラス繊維、またはこれらの繊維からなるシートを用いることを特徴とするものである。 According to a fifth aspect, the invention according to any one of claims 1 to 4, as the strip material, using a sheet made of carbon fibers or aramid fibers or polyester fibers or glass fibers or these fibers, It is characterized by this.

本発明によれば、充填材の充填により鋼管柱の内側への座屈を阻止し、帯材により鋼管柱の外側への座屈を阻止して、耐震補強効果を高めることができる。   ADVANTAGE OF THE INVENTION According to this invention, the buckling to the inner side of a steel pipe column can be prevented by filling with a filler, and the buckling to the outer side of a steel pipe column can be prevented by a strip | belt material, and a seismic reinforcement effect can be heightened.

また、既設の鋼管柱への穴明け作業と充填材の充填作業と帯材の巻き作業であるため、前記従来の鉄板の溶接による補強に比べて、特殊な技術を必要とする作業員が不要で、かつ安全な作業で行える。   In addition, because it is a drilling work to an existing steel pipe column, a filling work of a filler, and a winding work of a strip, an operator who requires a special technique is not required compared with the conventional reinforcement by welding of an iron plate. And can be done safely.

また、前記鋼管柱の外周面にコンクリートを打設するものに比べて、鋼管柱自体の大きさをあまり変えずに補強が行え、平面計画にもほとんど影響しない。   Further, as compared with the case of placing concrete on the outer peripheral surface of the steel pipe column, the steel pipe column itself can be reinforced without changing much in size, and the plan plan is hardly affected.

また、請求項４記載の発明によれば、鋼管柱の重量を大きく増すことなく補強でき、構造的な影響を少なくすることができる。   Further, according to the invention described in claim 4, it is possible to reinforce without greatly increasing the weight of the steel pipe column and to reduce the structural influence.

更に、請求項５記載の発明によれば、引っ張りに強い帯材により鋼管柱の外側への座屈止め効果を高めることができる。   Furthermore, according to the fifth aspect of the present invention, the effect of preventing buckling of the steel pipe column to the outside can be enhanced by the band material resistant to pulling.

本発明を実施するための最良の形態を図に示す実施例に基づいて説明する。   BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described based on an embodiment shown in the drawings.

本発明の耐震補強方法を施す対象物は、例えば建築物や高架橋、高架道路などの鋼管柱であり、図１（ａ）に示すように、地上或いは下階などの下部１と被支承物や上階などの上部２間に立設される鋼管柱３である。この鋼管柱３は既設の柱であり、その柱の横断面形状は円形、四角形などであり、特に形状は問わない。   The object to which the seismic retrofitting method of the present invention is applied is, for example, a steel pipe column such as a building, a viaduct, an elevated road, etc. As shown in FIG. It is the steel pipe pillar 3 standingly arranged between upper parts 2, such as an upper floor. The steel pipe column 3 is an existing column, and the cross-sectional shape of the column is a circle, a rectangle, or the like, and the shape is not particularly limited.

この立設された鋼管柱３に、現場において図１（ｂ）に示すように、側壁上部に上部穴４を穿ち、側壁下部に下部穴５を穿つ。この下部穴５には注入管６を付設するとよい。   As shown in FIG. 1 (b), the steel pipe column 3 is pierced with an upper hole 4 in the upper part of the side wall and a lower hole 5 in the lower part of the side wall. An injection tube 6 may be attached to the lower hole 5.

次に、前記下部穴５、注入管６を付設した場合にはこの注入管６を通じて図１（ｃ）に示すように鋼管柱３内に充填材７を注入し、鋼管柱３内の略上端部まで満たす。この充填材７としては、コンクリートや発泡系充填剤を使用する。コンクリートとしては軽量コンクリートが望ましく、また、発砲系充填剤としては、ウレタン系やフェノール系などの樹脂を発泡剤で発泡させるものを使用する。また、充填方法としては、コンクリートポンプなどの適宜なポンプＰを使用してホース８により充填材７を鋼管柱３内に圧送する。   Next, when the lower hole 5 and the injection pipe 6 are provided, the filler 7 is injected into the steel pipe column 3 through the injection pipe 6 as shown in FIG. Fill up to the department. As the filler 7, concrete or foaming filler is used. As the concrete, lightweight concrete is desirable, and as the foaming filler, a resin that foams a resin such as urethane or phenol with a foaming agent is used. Moreover, as a filling method, the filling material 7 is pumped into the steel pipe column 3 by the hose 8 using an appropriate pump P such as a concrete pump.

下部穴５（注入管６）から充填材７を鋼管柱３内に圧送すると、鋼管柱３内の空気は上部穴４から外部へ押し出され、充填材７内に空洞部が発生することなく充填材７が良好に充填される。   When the filler 7 is pumped into the steel pipe column 3 from the lower hole 5 (injection pipe 6), the air in the steel pipe column 3 is pushed out from the upper hole 4 to fill the filler 7 without generating a cavity. The material 7 is filled well.

次に、前記の充填作業が終了した後、ホース８、注入管６を使用した場合はその注入管６を外し、鋼管柱３内の充填材７を自然硬化させる。   Next, when the hose 8 and the injection pipe 6 are used after the filling operation is completed, the injection pipe 6 is removed and the filler 7 in the steel pipe column 3 is naturally hardened.

また、前記の鋼管柱３の外周面に図１（ｄ）に示すように、繊維または繊維シートからなる帯材９を接着剤で貼り付けて巻き付ける。この帯材９は鋼管柱３の外周面に、その上下の一方から他方へ一連に巻きつけるとよい。この帯材９の繊維または繊維シートとしては炭素繊維、アラミド繊維、ポリエステル繊維、ガラス繊維などの繊維を束にしてロープ状にしたもの、またはこの繊維を用いて織成或いは編成したシート状のものである。   Moreover, as shown in FIG.1 (d), the strip 9 which consists of a fiber or a fiber sheet is affixed on an outer peripheral surface of the said steel pipe pillar 3 with an adhesive agent, and is wound. The strip 9 may be wound around the outer peripheral surface of the steel pipe column 3 in a series from one of the upper and lower sides to the other. As the fiber or fiber sheet of the strip 9, the fiber, carbon fiber, aramid fiber, polyester fiber, glass fiber, or the like is bundled to form a rope, or the sheet is woven or knitted using this fiber. It is.

次に、図１（ｅ）に示すように、前記帯材９の外面に仕上げ塗料１０を吹き付け或いは塗布などで施す。   Next, as shown in FIG. 1E, a finish paint 10 is applied to the outer surface of the strip 9 by spraying or coating.

以上のような施工により、次のような効果を発揮する。
鋼管柱３内に充填材７が充填されるため、鋼管柱３の内側への座屈が阻止され、また、鋼管柱３の外周面に帯材９を巻き付けたことにより鋼管柱３の外側への座屈も阻止される。したがって、地震時における鋼管柱３の座屈破損を防止する補強効果が高くなる。また、鋼管柱３内に充填する充填材７として軽量コンクリートや発泡系充填剤を使用することにより、鋼管柱の重量を大きく増すことなく補強できる。 The following effects are exhibited by the above construction.
Since the steel tube column 3 is filled with the filler 7, buckling to the inside of the steel tube column 3 is prevented, and the strip 9 is wound around the outer peripheral surface of the steel tube column 3 to the outside of the steel tube column 3. Buckling is also prevented. Therefore, the reinforcement effect which prevents the buckling failure of the steel pipe column 3 at the time of an earthquake becomes high. Further, by using lightweight concrete or foaming filler as the filler 7 filled in the steel pipe column 3, it can be reinforced without greatly increasing the weight of the steel pipe column.

また、前記従来の鉄板を溶接するものに比べて、施工上においては、溶接工などの特殊な技術を必要とする作業員が不要になり、火の危険性も極端に少なくなる。また、構造上においては、溶接熱の影響もなく、溶接に比べて品質確保が容易である。   In addition, compared to the conventional welding of steel plates, workers who require special techniques such as a welder are not required in construction, and the risk of fire is extremely reduced. In terms of structure, it is easy to ensure quality compared to welding without the influence of welding heat.

また、前記鋼管柱の外回りにコンクリートを打設するものに比べて、柱自体の大きさも変らず、平面計画にもほとんど影響せず、更に、補強後の重量も大きく増えず、構造的にも影響は少ない。   In addition, the size of the column itself does not change compared to the case where concrete is placed around the steel pipe column, and the plan is hardly affected. The impact is small.

図２は第２実施例を示す。
本第２実施例は、既設の鋼管柱３の側壁上部に穴１１を穿設し、該穴１１から充填材７を鋼管柱３内に充填するようにしたものである。この充填材の充填方法は、ホース１２を使用して前記のようにポンプで圧送して行ってもよく、また、穴１１から自然落下的に充填してもよい。 FIG. 2 shows a second embodiment.
In the second embodiment, a hole 11 is formed in the upper portion of the side wall of the existing steel pipe column 3, and the filler 7 is filled into the steel pipe column 3 from the hole 11. This filling material may be filled by pumping using the hose 12 as described above, or may be filled in a natural drop from the hole 11.

また、充填材７の充填後に、鋼管柱３の外面に、前記と同様に帯材９を巻設し、更に仕上げ塗料１０を施す。
本実施例においても前記第１実施例と同様の効果を発揮できる。 Further, after the filling material 7 is filled, the band material 9 is wound around the outer surface of the steel pipe column 3 in the same manner as described above, and the finish paint 10 is further applied.
Also in this embodiment, the same effect as in the first embodiment can be exhibited.

（ａ）〜（ｅ）は本発明の補強工程の第１実施例を示す図。(A)-(e) is a figure which shows 1st Example of the reinforcement process of this invention. 本発明の第２実施例を示す鋼管柱の断面図。Sectional drawing of the steel pipe pillar which shows 2nd Example of this invention. 従来の補強構造を示す図。The figure which shows the conventional reinforcement structure.

符号の説明Explanation of symbols

３ 鋼管柱
４ 上部穴
５ 下部穴
７ 充填材
９ 帯材
１１ 穴 3 Steel tube pillar 4 Upper hole 5 Lower hole 7 Filler 9 Band material 11 Hole

Claims (5)

既設の鋼管柱に穴を穿設し、該穴から鋼管柱内に充填材を充填し、該鋼管柱の外周面に帯材を螺旋状に巻設することを特徴とする鋼管柱の耐震補強方法。 Seismic reinforcement of a steel pipe column characterized in that a hole is drilled in an existing steel pipe column, a filler is filled into the steel pipe column from the hole, and a strip is spirally wound around the outer peripheral surface of the steel pipe column Method. 既設の鋼管柱の側壁上部に上部穴を穿設し、側壁下部に下部穴を穿設し、その下部穴から充填材を鋼管柱内に充填し、鋼管柱の外周面に帯材を螺旋状に巻設することを特徴とする鋼管柱の耐震補強方法。 An upper hole is drilled in the upper part of the side wall of the existing steel pipe column, a lower hole is drilled in the lower part of the side wall, a filler is filled into the steel pipe column from the lower hole, and a strip is spiraled on the outer peripheral surface of the steel pipe column A method for seismic reinforcement of steel pipe columns, characterized by being wound around. 既設の鋼管柱の側壁上部に穴を穿設し、該穴から鋼管柱内に充填材を充填し、該鋼管柱の外周面に帯材を螺旋状に巻設することを特徴とする鋼管柱の耐震補強方法。 A steel pipe column characterized in that a hole is drilled in the upper side wall of an existing steel pipe column, a filler is filled into the steel pipe column from the hole, and a strip is spirally wound around the outer peripheral surface of the steel pipe column Seismic reinforcement method. 前記充填材として、発砲系充填剤または軽量コンクリートを用いることを特徴とする請求項１又は２又は３記載の鋼管柱の耐震補強方法。   4. The method for seismic reinforcement of steel pipe columns according to claim 1, 2 or 3, wherein a foaming filler or lightweight concrete is used as the filler. 前記帯材として、炭素繊維またはアラミド繊維またはポリエステル繊維またはガラス繊維、またはこれらの繊維からなるシートを用いることを特徴とする請求項１乃至４のいずれか１項に記載の鋼管柱の耐震補強方法。 As the strip material, carbon fibers or aramid fibers or polyester fibers or glass fibers or Retrofit method of the steel pipe column according to any one of claims 1 to 4, characterized in that a sheet made of these fibers, .
JP2003426122A 2003-12-24 2003-12-24 Seismic reinforcement method for steel pipe columns Expired - Fee Related JP4178102B2 (en)

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