JPS5819915B2 - Shear reinforcement method for openings in reinforced concrete members - Google Patents
Shear reinforcement method for openings in reinforced concrete membersInfo
- Publication number
- JPS5819915B2 JPS5819915B2 JP53116105A JP11610578A JPS5819915B2 JP S5819915 B2 JPS5819915 B2 JP S5819915B2 JP 53116105 A JP53116105 A JP 53116105A JP 11610578 A JP11610578 A JP 11610578A JP S5819915 B2 JPS5819915 B2 JP S5819915B2
- Authority
- JP
- Japan
- Prior art keywords
- reinforced concrete
- hole
- holes
- precast concrete
- bolt
- 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
Links
Landscapes
- Working Measures On Existing Buildindgs (AREA)
Description
【発明の詳細な説明】
本発明は建造物等の構造体の既に構築された鉄筋コンク
リート部材に設ける開口部のせん断補強方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for shear reinforcing an opening provided in an already constructed reinforced concrete member of a structure such as a building.
一般に開口部を有する部材が外力を受けると、開口部の
周辺では応力集中が起るものであり、例へば、円孔を持
つ弾性無限板が一様なせん断力を受ける場合には円孔縁
の斜張力は円孔から光分離れた位置の４倍に達するもの
である。Generally, when a member with an opening is subjected to an external force, stress concentration occurs around the opening. For example, when an elastic infinite plate with a circular hole is subjected to a uniform shearing force, stress concentration at the edge of the circular hole occurs. The oblique tension reaches four times as much as the position optically separated from the circular hole.
このため、建造物の構造体において、鉄筋コンクリート
部材に設備配管用等の開口部である貫通孔を設ける場合
には、この貫通孔の位置を梁部材の場合にはせん断力の
特に小さいスパンの中央附近にするなどの配慮をすると
共に、コンクリートの打設前に予め鉄筋や鋼板等を用い
て開口部を形成する仮枠の周辺に斜張力に対する必要な
補強を施すのが普通である。For this reason, in the structure of a building, when providing a through hole, which is an opening for equipment piping, etc., in a reinforced concrete member, the location of the through hole is at the center of the span where the shear force is particularly low in the case of a beam member. It is common practice to take necessary measures to prevent diagonal tension from occurring around the temporary frame that forms the opening, using reinforcing bars, steel plates, etc. before pouring concrete.
しかしながら、鉄筋コンクリート部材の構築後において
、設備の変更等によって開口部の位置の変更、又は新た
に開口部の必要が生ずることがしばしばあるものである
。However, after constructing a reinforced concrete member, it often becomes necessary to change the position of the opening or create a new opening due to changes in equipment or the like.
本発明は、上記する既に構築された鉄筋コンクリート部
材に開口部を設ける場合に、この開口部のせん断補強を
有効かつ容易確実に行うことが出来る方法を提供するも
のである。The present invention provides a method that can effectively, easily and reliably perform shear reinforcement of an opening when an opening is provided in the above-mentioned already constructed reinforced concrete member.
以下に本発明の鉄筋コンクリート部材に設ける開口部の
せん断補強方法を説明すると、本方法は第１図乃至第４
図に例示するように、構造体の既に構築された鉄筋コン
クリート部材１０所要位置に、穿孔機によって下記する
プレキャストコンクリート補強板３の中央孔４に合わせ
て貫通孔５を穿孔すると共に該貫通孔５０周辺にプレキ
ャストコンクリート補強板３の周辺に設けたボルト孔６
に合わせてボルト挿通孔７を穿孔し、ついで鉄筋コンク
リート部材１０両側に、プレキャストコンクリート補強
板３を、その中央孔４とその周辺のボルト孔６を上記の
貫通孔５とボルト挿通孔７にそれぞれ合致させて当接し
、上記のボルト孔６とボルト挿通孔７を通じてＰＣ鋼棒
８を挿通し、このＰＣ鋼棒８を緊張定着して上記のプレ
キャストコンクリート補強板３を鉄筋コンクリート部材
１０両側に締付は固着せしめることを特徴とするもので
ある。The shear reinforcement method for openings provided in reinforced concrete members of the present invention will be explained below.
As illustrated in the figure, a through-hole 5 is bored in the required position of the already constructed reinforced concrete member 10 of the structure using a drilling machine in line with the center hole 4 of the precast concrete reinforcing plate 3 described below, and around the through-hole 50. Bolt holes 6 provided around the precast concrete reinforcing plate 3
Drill bolt insertion holes 7 according to the above, and then install precast concrete reinforcing plates 3 on both sides of the reinforced concrete member 10 so that the center hole 4 and the bolt holes 6 around it match the through holes 5 and bolt insertion holes 7, respectively. The PC steel rods 8 are inserted through the bolt holes 6 and the bolt insertion holes 7, and the precast concrete reinforcement plates 3 are tightened on both sides of the reinforced concrete member 10 by fixing the PC steel rods 8 under tension. It is characterized by being fixed.
なお図面において、２はコンクリート、９は鉄筋コンク
リート部材の主鉄筋を示している。In the drawings, 2 indicates concrete, and 9 indicates the main reinforcing bars of the reinforced concrete member.
又、第４図において、１０は鉄筋コンクリート部材１０
表面とプレキャストコンクリート補強板３との間及び該
補強板３と定着ナツト１１の座板１２との間に施された
セメントペースト又はセメントモルタルを示し、１３は
プレキャストコンクリート補強板３の補強筋を示してい
る。In addition, in FIG. 4, 10 is a reinforced concrete member 10.
Cement paste or cement mortar applied between the surface and the precast concrete reinforcing plate 3 and between the reinforcing plate 3 and the seat plate 12 of the fixing nut 11, and 13 indicates reinforcing bars of the precast concrete reinforcing plate 3. ing.
しかして、上記の鉄筋コンクリート部材１０貫通孔５の
穿孔において、貫通孔５の位置は当然せん断力のできる
だけ小さい所に定められ、又、開口部はできるだけ小さ
く定められるものである。Therefore, in drilling the through-hole 5 in the reinforced concrete member 10, the position of the through-hole 5 is naturally determined at a place where the shearing force is as small as possible, and the opening is determined to be as small as possible.
本発明の方法は上記のように行われるもので、鉄筋コン
クリート部材１における開口部において、穿孔された貫
通孔５０両側にＰＣ鋼棒８によって締付けて一体に固着
されたプレキャストコンクリ、−ト補強版３によって、
貫通孔５により欠損されるコツクリート２の断面積な補
償されるので、該貫通孔５の部分の剛性を高め得ると共
にせん断力によって生ずる斜張力に対する所要抵抗断面
を充分保持できる。The method of the present invention is carried out as described above, in which a precast concrete reinforcing plate 3 is fixed integrally with a PC steel rod 8 on both sides of a drilled through hole 50 at an opening in a reinforced concrete member 1. By,
Since the cross-sectional area of the cleat 2 that is missing due to the through-hole 5 is compensated for, the rigidity of the through-hole 5 portion can be increased, and the required cross-section for resistance to diagonal tension caused by shearing force can be sufficiently maintained.
又プレキャストコンクリート補強板３のＰＣ鋼棒による
締付は固着により、該補強板３と鉄筋コンクリート部材
１の構造的の一体化が確保されると共に貫通孔５０周辺
部のコンクリートに圧縮応力が付与されるので、この部
のせん断力に対するコンクリートの耐力を効果的に増強
せしめ得るものである。Furthermore, tightening of the precast concrete reinforcing plate 3 with the PC steel rod ensures structural integration of the reinforcing plate 3 and the reinforced concrete member 1, and imparts compressive stress to the concrete around the through hole 50. Therefore, the bearing capacity of concrete against shear force in this area can be effectively increased.
更に、本発明の方法は、予めプレキャストコンクリート
補強板３を作って置くことによって、容易迅速に施工で
きる利点も有する。Furthermore, the method of the present invention has the advantage that the precast concrete reinforcing plate 3 can be made and placed in advance so that construction can be carried out easily and quickly.
添付の図面は、本発明の方法の態様を実施例によって説
明するもので、第１図は本発明に使用するプレキャスト
コンクリート補強板の斜面図、第２図は鉄筋コンクリー
ト部材に貫通孔とボルト挿通孔を穿孔した状態を示す要
部の縦断面図、第３図は本発明の方法を実施した開口部
の正面図、第４図は前置のＡ−Ａ線に沿う縦断面図であ
る。
１・・・・・・鉄筋コンクリート部材、２・・・・・・
コンクリート、３・・・・・・プレキャストコンクリー
ト補強板、４・・・・・・中央孔、５・・・・・・貫通
孔、６・・・・・・ボルト孔、７・・・・・・ボルト挿
通孔、８・・・・・・ＰＣ鋼棒、９・・・・・・主鉄筋
、１０・・・・・・セメントペースト又はセメントモル
タル、１１・・・・・・定着ナツト、１２・・・・・・
座板、１３・・・・・・補強筋。The attached drawings are for explaining aspects of the method of the present invention by examples. Figure 1 is a slope view of a precast concrete reinforcing plate used in the present invention, and Figure 2 is a diagram showing through holes and bolt insertion holes in a reinforced concrete member. FIG. 3 is a front view of the opening in which the method of the present invention has been carried out, and FIG. 4 is a longitudinal sectional view taken along line A-A in the foregoing. 1...Reinforced concrete members, 2...
Concrete, 3... Precast concrete reinforcement plate, 4... Center hole, 5... Through hole, 6... Bolt hole, 7...・Bolt insertion hole, 8...PC steel bar, 9...Main reinforcing bar, 10...Cement paste or cement mortar, 11...Fixing nut, 12・・・・・・
Seat plate, 13... Reinforcement bar.
Claims (1)
要位置に、穿孔機によって下記するプレキャストコンク
リート補強板の中央孔に合わせて貫通孔を穿孔すると共
に該貫通孔の周辺にプレキャストコンクリート補強板の
周辺に設けたボルト孔ニ合ワせてボルト挿通孔を穿孔し
、ついで鉄筋コンクリート部材の両側に、プレキャスト
コンクリート補強板を、その中央孔とその周辺のボルト
孔を上記の貫通孔とボルト挿通孔にそれぞれ合致させて
当接し、上記のボルト孔とボルト挿通孔を通じてＰＣ鋼
棒を挿通し、このＰＣ鋼棒を緊張定着して上記のプレキ
ャストコンクリート補強板を鉄筋コンクリート部材の両
側に締付は固着せしめることを特徴とする鉄筋コンクリ
ート部材の開口部に設けるせん断補強方法。1. Drill a through hole in the required position of the already constructed reinforced concrete member of the structure using a drilling machine to match the center hole of the precast concrete reinforcing plate as described below, and provide the holes around the precast concrete reinforcing plate around the through hole. Drill bolt insertion holes to match the bolt holes mentioned above, and then place precast concrete reinforcing plates on both sides of the reinforced concrete member, aligning the center hole and the bolt holes around it with the through holes and bolt insertion holes, respectively. A PC steel rod is inserted through the bolt hole and the bolt insertion hole, and the precast concrete reinforcing plate is tightened and fixed to both sides of the reinforced concrete member by tension-fixing the PC steel rod. A method of shear reinforcement provided at openings in reinforced concrete members.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53116105A JPS5819915B2 (en) | 1978-09-20 | 1978-09-20 | Shear reinforcement method for openings in reinforced concrete members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53116105A JPS5819915B2 (en) | 1978-09-20 | 1978-09-20 | Shear reinforcement method for openings in reinforced concrete members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5542958A JPS5542958A (en) | 1980-03-26 |
| JPS5819915B2 true JPS5819915B2 (en) | 1983-04-20 |
Family
ID=14678813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53116105A Expired JPS5819915B2 (en) | 1978-09-20 | 1978-09-20 | Shear reinforcement method for openings in reinforced concrete members |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5819915B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6122715U (en) * | 1984-07-16 | 1986-02-10 | 傳祥 李 | cardboard packaging box |
| JPS61103311U (en) * | 1984-12-12 | 1986-07-01 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS531320A (en) * | 1976-06-26 | 1978-01-09 | Kajita Koumuten Kk | Method of supporting pipe penetrating oil prevention bank |
-
1978
- 1978-09-20 JP JP53116105A patent/JPS5819915B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6122715U (en) * | 1984-07-16 | 1986-02-10 | 傳祥 李 | cardboard packaging box |
| JPS61103311U (en) * | 1984-12-12 | 1986-07-01 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5542958A (en) | 1980-03-26 |
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