JP4290634B2 - Reinforcing method and reinforcing device for reinforced concrete bar member - Google Patents
Reinforcing method and reinforcing device for reinforced concrete bar member Download PDFInfo
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- JP4290634B2 JP4290634B2 JP2004325183A JP2004325183A JP4290634B2 JP 4290634 B2 JP4290634 B2 JP 4290634B2 JP 2004325183 A JP2004325183 A JP 2004325183A JP 2004325183 A JP2004325183 A JP 2004325183A JP 4290634 B2 JP4290634 B2 JP 4290634B2
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Description
本発明は高架橋柱・橋脚・橋台・建築の柱や梁等の鉄筋コンクリート棒部材の補強方法及び補強装置に関するものである。 The present invention relates to a reinforcing method and a reinforcing device for a reinforced concrete bar member such as a viaduct column, a pier, an abutment, a building column or a beam.
鉄筋コンクリート柱に対する耐震補強方法として、柱の隅角部と山形鋼間にモルタルを充填して固定し、各隅角部の山形鋼間を鋼棒で締結して柱の長手方向に直交する方向に取り囲んで補強する方法が提案されている（特許文献１）。
また、鋳鉄製のアングル継手を柱の各隅角部に配置し、アングル継手間を補強用鋼棒で締結して柱の長手方向に直交する方向に取り囲んで補強するものも提案されている（特許文献２）。
In addition, a cast iron angle joint is disposed at each corner of the column, and the angle joint is fastened with a reinforcing steel rod to surround and reinforce in a direction perpendicular to the longitudinal direction of the column ( Patent Document 2).
上記提案のものは、撤去工事を極力抑え、狭隘な空間での施工が可能であるが、特許文献１では柱と山形鋼との間にモルタルを充填して固定しているため、現地でのモルタルの施工が必要となり、そのため、工期、工事費がかかるという問題があった。また、特許文献２の方法では、鋳鉄製のアングル継手を用いるため高価であるとともに、アングル継手が補強用鋼材の引っ張り力を負担しているため、大きな鋼材径の引っ張り力にはアングル継手が対応できないという問題があった。 The above proposal can suppress the removal work as much as possible and can be installed in a narrow space. However, in Patent Document 1, since the mortar is filled and fixed between the pillar and the angle iron, Mortar construction was required, which caused a problem that the construction period and construction cost were high. Further, in the method of Patent Document 2, since an angle joint made of cast iron is used, it is expensive and the angle joint bears the tensile force of the reinforcing steel material. Therefore, the angle joint can handle the tensile force of a large steel material diameter. There was a problem that I could not.
本発明は上記課題を解決しようとするもので、工期の短縮、工事費の削減ならびに狭隘な空間での施工を可能にし、かつ大きな補強用鋼材径の使用にも対応できるようにすることを目的とする。
そのために本発明の鉄筋コンクリート柱の補強方法は、内面形状を棒部材隅角部の形状に倣うように形成した内側山形鋼と外側山形鋼の各２辺間に鋼板を介在させた定着部材の内側山形鋼の内面を鉄筋コンクリート棒部材の各隅角部に施工し、外側山形鋼の各２辺を貫通させた補強用鋼棒で各隣接隅角部の定着部材間を相互に締結し、鉄筋コンクリート棒部材を長手方向に直交する方向に取り囲んで補強することを特徴とする。
また、本発明の鉄筋コンクリート棒部材の補強装置は、鉄筋コンクリート棒部材の各隅角部に定着部材を施工し、定着部材相互間を締結して鉄筋コンクリート棒部材を長手方向に直交する方向に取り囲んで補強する装置であって、内側山形鋼の内面が棒部材隅角部の形状に倣うように形成され、内側山形鋼と外側山形鋼の各２辺間に鋼板を介在させた定着部材と、前記外側山形鋼の２辺を貫通し隣接隅角部の定着部材間を締結する補強用鋼棒とからなることを特徴とする。
The present invention is intended to solve the above-mentioned problems, and aims to shorten the construction period, reduce the construction cost, enable construction in a confined space, and cope with the use of a large steel diameter for reinforcement. And
For this purpose, the reinforcing method for a reinforced concrete column according to the present invention is an inner surface of a fixing member in which a steel plate is interposed between two sides of an inner angle iron and an outer angle steel formed so that the inner surface shape follows the shape of a corner of a bar member. The inner surface of the angle steel is installed at each corner of the reinforced concrete bar member, and the fixing members at the adjacent corners are mutually fastened with reinforcing steel bars that penetrate each of the two sides of the outer angle steel. The member is surrounded and reinforced in a direction orthogonal to the longitudinal direction.
In addition, the reinforcing device for a reinforced concrete bar member according to the present invention is constructed by installing a fixing member at each corner of the reinforced concrete bar member and fastening the fixing members to surround the reinforced concrete bar member in a direction perpendicular to the longitudinal direction. A fixing member in which an inner surface of the inner chevron is formed to follow the shape of the corner of the bar member, and a steel plate is interposed between each of the two sides of the inner chevron and the outer chevron, and the outer It consists of a reinforcing steel rod that passes through two sides of an angle steel and fastens between fixing members at adjacent corners.
本発明は、内側山形鋼と外側山形鋼の各２辺間に鋼板を介在させて各棒部材隅角部に設置した定着部材間を鋼棒で締結するようにしたので、現場でのモルタルの使用が必要なく、市販の形鋼の組み合わせで製作可能となるため、施工性がよく工事費の削減、狭隘な空間での施工が可能であり、かつ鋼板で圧縮荷重を受けるため大きな補強用鋼材径の使用にも問題なく対応することができる。 In the present invention, a steel plate is interposed between each of the two sides of the inner angle steel and the outer angle steel, and the fixing members installed at the corners of each bar member are fastened with steel bars. It is not necessary to use, and can be manufactured with a combination of commercially available shape steels. Therefore, workability is good, construction costs can be reduced, construction in a confined space is possible, and a steel plate receives a compressive load. The use of the diameter can be handled without any problem.
以下、本発明の実施の形態について説明する。なお、以下では断面矩形の柱を例にとって説明するが、本発明は、断面矩形に限定されるものではなく、断面が任意の多角形にも適用可能であり、また、柱に限定されるものではなく、梁等のコンクリート製棒状部材を補強するのにも適用可能である。
図１は本実施形態の既設柱の補強方法を説明する断面図である。
既設柱４は、例えば既設の橋脚・橋台・建築等の角形の鉄筋コンクリート柱である。この既設柱４の各隅角部に、その内面形状が柱の隅角部形状に倣った等辺（必要に応じて不等辺であってもよい）の山形鋼２を所定長さに切断して施工し、さらに鋼板３を介在させて所定長さに切断した等辺（必要に応じて不等辺であってもよい）の山形鋼１を施工し、山形鋼１と山形鋼２の各２辺の間に鋼板３，３を挟持して定着部材を施工する。次いで、外側の山形鋼１の２辺を貫通する補強用鋼棒５，５で隣接隅角部の定着部材間を連結する。なお、鋼板３，３はそれぞれ補強用鋼棒５，５の上側か下側に避けた位置に設けられる。次いで、補強用鋼棒５，５端部をナット６，６で締めて各隅角部の定着部材間を強固に締結することにより、既設柱を長手方向に直交する方向に取り囲んで補強する。
Embodiments of the present invention will be described below. In the following, a column having a rectangular cross section will be described as an example. However, the present invention is not limited to a rectangular cross section, and the cross section can be applied to an arbitrary polygon and is limited to a column. Instead, the present invention can be applied to reinforce a concrete rod-like member such as a beam.
FIG. 1 is a cross-sectional view illustrating a method for reinforcing an existing pillar according to the present embodiment.
The existing pillar 4 is a rectangular reinforced concrete pillar such as an existing pier, abutment, or architecture. At each corner portion of the existing column 4, the angle steel 2 having an inner surface that conforms to the shape of the corner portion of the column is cut into a predetermined length. Construction of the angle steel 1 of equal sides (which may be unequal sides if necessary) cut by a predetermined length with the steel plate 3 interposed between the two sides of the angle steel 1 and the angle steel 2 The fixing member is constructed by sandwiching the steel plates 3 and 3 therebetween. Next, the fixing members at adjacent corners are connected by reinforcing steel bars 5 and 5 penetrating the two sides of the outer angle steel 1. The steel plates 3 and 3 are provided at positions avoiding the upper side or the lower side of the reinforcing steel rods 5 and 5, respectively. Next, the ends of the reinforcing steel rods 5 and 5 are tightened with nuts 6 and 6 to firmly fasten the fixing members between the corners, so that the existing columns are surrounded and reinforced in a direction perpendicular to the longitudinal direction.
なお、施工性を向上させるために、施工前にあらかじめ、鋼板３を山形鋼１または山形鋼２に接着または溶接しておくようにしてもよく、或いは、鋼板３を山形鋼１と山形鋼２に接着または溶接しておくようにしてもよい。 In addition, in order to improve workability, the steel plate 3 may be bonded or welded to the angle steel 1 or the angle steel 2 in advance before the construction, or the steel plate 3 is angled steel 1 and angle steel 2. You may make it adhere | attach or weld to.
このように、補強用鋼棒６で締結すると山形鋼１から鋼板３に圧縮荷重がかかり、この圧縮荷重が山形鋼２を通して既設柱５に加えられる。山形鋼と鋼板には圧縮荷重がかかるだけであるので大口径の補強用鋼棒で締結しても強度的に問題はない。なお、山形鋼２の２辺は鋼板よりも外側まで延びていることが望ましい。 As described above, when the reinforcing steel rod 6 is fastened, a compression load is applied from the angle steel 1 to the steel plate 3, and this compression load is applied to the existing column 5 through the angle steel 2. Since the angle steel and the steel plate are only subjected to a compressive load, there is no problem in strength even if they are fastened with a large-diameter reinforcing steel rod. In addition, it is desirable that the two sides of the angle steel 2 extend outside the steel plate.
使用する補強用鋼棒の径（ｒ）、等辺山形鋼１（外側）の辺の長さ（Ｌ１）と等辺山形鋼２（内側）の辺の長さ（Ｌ２）、鋼板の断面寸法（長辺Ａ、短辺Ｂ）の例は表１の通りである。 The diameter (r) of the reinforcing steel rod used, the side length (L1) of the equilateral angle steel 1 (outside), the side length (L2) of the equilateral angle steel 2 (inside), and the cross-sectional dimension of the steel plate (long) Examples of side A and short side B) are shown in Table 1.
表１ ┌────┬─────┬─────┬───────┐ │鋼棒径 │山形鋼１ │山形鋼２ │ 鋼板 │ ├────┬─────┼─────┼───┬───┤ │ｒ(mm) │Ｌ１(mm) │Ｌ２(mm) │Ａ(mm)│Ｂ(mm)│ ├────┼─────┼─────┼───┼───┤ │ １９ │ ９０ │１２０ │５０ │２２ │ │ ２３ │１００ │１３０ │５０ │２８ │ │ ２６ │１３０ │１５０ │６５ │３０ │ │ ３２ │１３０ │１７５ │６５ │３６ │ └────┴─────┴─────┴───┴───┘ 図２は本発明の定着部材を説明する図であり、図２（ａ）は断面図、図２（ｂ）、（ｃ）は側面図である。
図２（ａ）は、山形鋼１、鋼板３、鋼棒５のみ示した断面図であり、図２（ａ）の矢印Ａ方向、矢印Ｂ方向から見た側面図がそれぞれ図２（ｂ）、図２（ｃ）である。図２に示すように、鋼棒５を避けるように、鋼板３が配置され、この例では鋼棒の上側と下側に分割して配置している。図示の例では、所定間隔ごとに山形鋼に４段鋼板が設置されているが、この段数は任意に変更してもよい。また、このような構成の定着部材を単位として、柱の高さ方向に複数設置して補強するようにしてもよい。
Table 1 ┌────┬─────┬─────┬───────┐ │ Steel bar diameter │ Angle steel 1 │ Angle steel 2 │ Steel plate │ ├────┬─ ────┼─────┼───┬───┤ │r (mm) │L1 (mm) │L2 (mm) │A (mm) │B (mm) │ ├──── ┼─────┼─────┼───┼───┤ │ 19 │ 90 │120 │50 │22 │ │ 23 │100 │130 │50 │28 │ │ 26 │130 │150 │ 65 │30 │ │ 32 │130 │175 │65 │36 │ └────┴─────┴─────┴───┴───┘ Fig. 2 shows the fixing member of the present invention. FIG. 2A is a cross-sectional view, and FIGS. 2B and 2C are side views.
FIG. 2A is a cross-sectional view showing only the angle steel 1, the steel plate 3, and the steel bar 5, and the side views seen from the arrow A direction and the arrow B direction of FIG. FIG. 2 (c). As shown in FIG. 2, the steel plate 3 is arrange | positioned so that the steel rod 5 may be avoided, and in this example, it has divided | segmented and arrange | positioned on the upper side and the lower side of a steel rod. In the example shown in the figure, a four-stage steel plate is installed on the angle steel at every predetermined interval, but the number of stages may be arbitrarily changed. Further, a plurality of fixing members having such a configuration may be installed and reinforced in the height direction of the column.
本発明によれば、現場でのモルタルの使用が必要なく、市販の形鋼の組み合わせで製作可能となるため、施工性がよく工事費の削減、狭隘な空間での施工が可能であるので産業上の利用価値は極めて大きい。 According to the present invention, it is not necessary to use mortar on site, and it can be manufactured with a combination of commercially available steel shapes. Therefore, the workability is good, construction costs can be reduced, and construction in a narrow space is possible. The above utility value is extremely large.
１，２…山形鋼、３…鋼板、４…既設柱、５…補強用鋼棒、６…ナット。 1, 2 ... Angle steel, 3 ... Steel plate, 4 ... Existing pillar, 5 ... Reinforcing steel rod, 6 ... Nut.
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| JP2004325183A JP4290634B2 (en) | 2004-11-09 | 2004-11-09 | Reinforcing method and reinforcing device for reinforced concrete bar member |
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| JP2004325183A JP4290634B2 (en) | 2004-11-09 | 2004-11-09 | Reinforcing method and reinforcing device for reinforced concrete bar member |
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| JP4290634B2 true JP4290634B2 (en) | 2009-07-08 |
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| JP6176385B1 (en) * | 2016-12-07 | 2017-08-09 | 株式会社神島組 | Reinforcement fittings for concrete piers, reinforcement equipment for concrete piers, and reinforcement methods for concrete piers |
| CN109371858B (en) * | 2018-11-28 | 2024-01-12 | 南京工业大学 | Device for increasing longitudinal supporting length of main beam for existing bridge |
| CN113389271A (en) * | 2021-07-15 | 2021-09-14 | 辽宁工程技术大学 | Novel assembled concrete beam column node |
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