JPS6058351B2 - Shear reinforcement method for openings in reinforced concrete members - Google Patents
Shear reinforcement method for openings in reinforced concrete membersInfo
- Publication number
- JPS6058351B2 JPS6058351B2 JP9555378A JP9555378A JPS6058351B2 JP S6058351 B2 JPS6058351 B2 JP S6058351B2 JP 9555378 A JP9555378 A JP 9555378A JP 9555378 A JP9555378 A JP 9555378A JP S6058351 B2 JPS6058351 B2 JP S6058351B2
- Authority
- JP
- Japan
- Prior art keywords
- reinforced concrete
- openings
- opening
- concrete members
- plate
- 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
- 239000011150 reinforced concrete Substances 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 16
- 230000002787 reinforcement Effects 0.000 title claims description 6
- 239000004567 concrete Substances 0.000 claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920006337 unsaturated polyester resin Polymers 0.000 claims description 3
- 238000010008 shearing Methods 0.000 description 2
- 238000009415 formwork Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
- 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、例えば円孔を持つ
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
斜張力は円孔から充分離れた位置の４倍にも達するもの
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 shear force, the slope of the edge of the circular hole is The tension reaches four times as much as at a position far enough away 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粱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内に斜張力に対する必要な補強
を施すのが普通である。しかしながら、鉄筋コンクリー
ト部材の構築後において、設備の変更等によつて開口部
の位置の変更、又は新たに開口部の必要が生ずることが
しばしはあるものである。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に行うことが出
来る方法を提供するものである。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 this through-hole is at the center of the span, where shearing force is particularly low in the case of a girder member. In addition to taking precautions such as ensuring that the area is close to the concrete, it is common practice to provide necessary reinforcement against diagonal tension within the temporary frame that forms the opening using reinforcing bars, steel plates, etc. before pouring concrete. 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. The present invention provides the following advantages when providing an opening in the above-mentioned already constructed reinforced concrete member:
The present invention provides a method that can effectively and easily perform shear reinforcement of this opening.
以下に本発明の第１発明の方法を第１図及び第２図に示
す実施例に基き説明すると、第１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は、構造体の既
に構築された鉄筋コンクリート部材１の所要位置に、穿
孔機によつて貫通孔２を穿孔して開口部２’を形成し、
ついで鉄筋コンクリート部材１の両側に上記開口部２’
の周辺に新たにコンクリートを打継ぎして開口部２’の
周辺の部材断面を増大する板状膨出部３を一体に造成し
、ついで上記の板状膨出部３が硬化したのち、該板状膨
出部３に数個のＰＣ鋼棒５の挿通孔４を上記の貫通孔２
に平行に穿孔し、この挿通孔４にＰＣ鋼棒５を挿通して
その両端をナット６によつて緊張定着することを特徴と
するものである。The method of the first invention of the present invention will be explained below based on the embodiment shown in FIGS. 1 and 2. The method of shear reinforcement of an opening provided in a reinforced concrete member of the first invention Drilling through holes 2 with a drilling machine at required positions of the reinforced concrete member 1 to form openings 2';
Then, the openings 2' are formed on both sides of the reinforced concrete member 1.
A plate-shaped bulge 3 is integrally created around the opening 2' by newly pouring concrete to increase the cross section of the member around the opening 2', and then, after the plate-shaped bulge 3 has hardened, The insertion holes 4 for several PC steel rods 5 are inserted into the plate-shaped bulging portion 3 through the above-mentioned through holes 2.
A PC steel rod 5 is inserted into the insertion hole 4 and both ends thereof are fixed under tension with nuts 6.
更に上記の第１発明の方法について詳記すると、上記の
コンクリートの打継ぎは、打継ぎする板状膨出部３が鉄
筋コンクリート部材１のコンクリートに付着がよくなる
よう、打継ぎに先立ち鉄筋コンクリート部材１の開口部
２″の周辺の打継ぎする面に目荒しを施すものである。Further, to describe the method of the first invention in detail, in the above-mentioned concrete pouring, the reinforced concrete member 1 is bonded to the reinforced concrete member 1 prior to pouring so that the plate-shaped bulging portion 3 to be spliced adheres well to the concrete of the reinforced concrete member 1. The surface to be joined around the opening 2'' is roughened.
しかして、コンクリートの打継ぎによる板状膨出部３の
コンクリートと既に構築された鉄筋コンクリート部材１
のコンクリートとの構造的一体化を確実にするため、第
１図及び第２図に例示するように、打継ぎした板状膨出
部３が硬化したのち、この部に数個のＰＣ鋼棒の挿通孔
４を上記の貫通孔２に平行に穿孔し、この挿通孔４にＰ
Ｃ鋼棒５を挿通してその両端をナット６によつて緊張定
着し、上記の板状膨出部３と既に構築された鉄筋コンク
リート部材１との接合面に圧縮応力を付与するものであ
る。つぎに、上記のコンクリートの打継ぎ施工において
、図示は省略したが、板状膨出部３の成型に適当な型枠
を鉄筋コンクリート部材１に取付けするものである。Therefore, the concrete of the plate-shaped bulging part 3 due to concrete pouring and the already constructed reinforced concrete member 1
In order to ensure structural integration with the concrete, several PC steel rods are inserted into this part after the spliced plate-shaped bulge part 3 has hardened, as illustrated in Figures 1 and 2. An insertion hole 4 is drilled in parallel to the above-mentioned through hole 2, and P is inserted into this insertion hole 4.
A C steel bar 5 is inserted and its both ends are tensioned and fixed with nuts 6 to apply compressive stress to the joint surface between the plate-shaped bulge 3 and the already constructed reinforced concrete member 1. Next, in the concrete pouring work described above, although not shown in the drawings, a formwork suitable for forming the plate-shaped bulging portion 3 is attached to the reinforced concrete member 1.
なお図面において８は打継ぎする部の補強筋てある。ま
た、本発明の実施において、上記した貫通孔２の位置は
、当然部材の受けるせん断力のできるだけ小さい所に定
められると共に、開口部貫通孔２の径もできるだけ小さ
く定められるものである。本発明の第１発明の方法は上
記のように行われるもので、既に構築された鉄筋コンク
リート部材１に設けられた開口部２″の両側周辺に新た
にコンクリートの打継ぎによつて一体に形成された板状
膨出部３によつて、貫通孔２により欠損される鉄筋コン
クリート部材１のコンクリートの断面積が補償されるの
で、該貫通孔２の部分の剛性を高め得ると共にせん断力
によつ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。In addition, in the drawing, 8 is a reinforcing bar at the part to be spliced. Further, in carrying out the present invention, the position of the above-mentioned through hole 2 is naturally determined at a place where the shearing force applied to the member is as small as possible, and the diameter of the opening through hole 2 is also determined to be as small as possible. The method of the first aspect of the present invention is carried out as described above, in which new concrete is integrally formed around both sides of the opening 2'' provided in the already constructed reinforced concrete member 1 by pouring concrete. The plate-shaped bulging portion 3 compensates for the cross-sectional area of the concrete of the reinforced concrete member 1 that is lost due to the through hole 2, so it is possible to increase the rigidity of the portion of the through hole 2, and to reduce the damage caused by shear force. The required resistance cross section against oblique tension can be sufficiently maintained.
また、本発明の方法は、現場でコンクリートの打継ぎに
よるものであるから、既に構築された鉄筋コンクリート
部材１に設ける開口部２″の形が円形でも角形でもその
大きさに対してその場で容易にそれに合わせて板状膨出
部３を成型できる点も便利である。つぎに、本発明の第
２発明の方法を第３図及び第４図に示す実施例に基き説
明する。In addition, since the method of the present invention is based on concrete pouring on site, it can be easily applied on the spot regardless of the size of the opening 2'' provided in the already constructed reinforced concrete member 1, whether circular or square. It is also convenient that the plate-shaped bulging portion 3 can be molded accordingly.Next, the method of the second aspect of the present invention will be explained based on the embodiment shown in FIGS. 3 and 4.
第２発明の鉄筋コンクリート部材に設ける開口部のせん
断補強方法は、構造体の既に構築された鉄筋コンクリー
ト部材１の所要位置に、穿孔機によつて貫通孔２を穿孔
して開口部２″を形成し、ついて鉄筋コンクリート部材
１の両側の上記開口部２″の周辺のコンクリートの面に
エポキシ樹脂、不飽和ポリエステル樹脂などの強力樹脂
接着剤７を塗布し、その上に新たにコンクリートを打継
ぎして開口部２″の周辺の部材断面を増大する板状膨出
部３を一体に造成することを特徴とするものである。更
に説明すると、上記した開口部２″の周辺の打継ぎする
面に目荒しを施した面にエポキシ樹脂、不飽和ポリエス
テル樹脂等の強力樹脂接着剤７を塗布し、直に、すなわ
ち該接着剤７が硬化しない前に、コンクリートを打継ぎ
する。この接着剤７と打継ぎされたコンクリートの硬化
の進行を適当に調節することによつて、実験によれば極
めて強力に打継ぎされた板状膨出部３は、鉄筋コンクリ
ート部材１のコンクリートと一体となるものである。第
２発明の方法は、コンクリートの打継ぎの前に開口部の
周辺の打継ぎする面に強力樹脂接着剤７を塗布するだけ
で、板状膨出部３のコンクリートと既に構築された鉄筋
コンクリート部材１のコンクリートの構造的一体化がで
き、第１発明の方法より容易かつ簡単に施工できる特長
を有するものである。The shear reinforcing method for an opening provided in a reinforced concrete member according to the second invention involves drilling a through hole 2 with a drilling machine at a required position in a reinforced concrete member 1 that has already been constructed to form an opening 2''. Then, a strong resin adhesive 7 such as epoxy resin or unsaturated polyester resin is applied to the concrete surface around the opening 2'' on both sides of the reinforced concrete member 1, and new concrete is poured on top of it to open the opening. It is characterized by integrally forming a plate-shaped bulging part 3 that increases the cross section of the member around the opening 2''.To explain further, the part 2'' has an eye on the joining surface around the opening 2''. A strong resin adhesive 7 such as epoxy resin or unsaturated polyester resin is applied to the roughened surface, and concrete is poured immediately, that is, before the adhesive 7 hardens. By appropriately adjusting the progress of hardening of the adhesive 7 and the concrete that has been spliced, the plate-shaped bulge 3, which has been spliced extremely strongly according to experiments, can be integrated with the concrete of the reinforced concrete member 1. This is the result. The method of the second invention is such that the concrete of the plate-shaped bulge 3 and the already constructed reinforced concrete members are bonded together by simply applying a strong resin adhesive 7 to the surface to be joined around the opening before joining the concrete. This method has the advantage that the concrete of No. 1 can be structurally integrated, and it can be constructed more easily and easily than the method of the first invention.
添付の図面は、本発明の方法の態様を実施例によつて説
明するもので、第１図は本発明の第１発明の実施例の正
面図、第２図は前図のＡ−Ａ線に沿う縦断面図である。
つぎに第３図は本発明の第２発明の実施例の正面図、第
４図は前図のＢ−Ｂ線に沿う縦断面図である。１・・・
・・・鉄筋コンクリート部材、２・・・・・・貫通孔、
２Ｚ・・・・開口部、３・・・・・・板状膨出部、４・
・・・・・挿通孔、５・・・・・・ＰＣ鋼棒、６・・・
・・・ナット、７・・・・・・強力樹脂接着剤、８・・
・・・・補強筋。The accompanying drawings illustrate aspects of the method of the present invention by way of examples, and FIG. 1 is a front view of the first embodiment of the present invention, and FIG. 2 is a view taken along line A-A in the previous figure. FIG. Next, FIG. 3 is a front view of a second embodiment of the present invention, and FIG. 4 is a longitudinal sectional view taken along line B--B in the previous figure. 1...
...Reinforced concrete member, 2...Through hole,
2Z...opening, 3...plate-like bulge, 4.
...Insertion hole, 5...PC steel rod, 6...
...Nut, 7...Strong resin adhesive, 8...
...Reinforcement bars.
Claims (1)
要位置に、穿孔機によつて貫通孔を穿孔して開口部を形
成し、ついで鉄筋コンクリート部材の両側の上記開口部
の周辺に新たにコンクリートを打継ぎして開口部の周辺
の部材断面を増大する板状膨出部を一体に造成し、つい
で上記の板状膨出部が硬化したのち、該板状膨出部に数
個のＰＣ鋼棒の挿通孔を上記の貫通孔に平行に穿孔し、
この挿通孔にＰＣ鋼棒を挿通してその両端をナットによ
つて緊張定着することを特徴とする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。 ２ 構造体の既に構築された鉄筋コンクリート部材の所
要位置に、穿孔機によつて貫通孔を穿孔して開口部を形
成し、ついで鉄筋コンクリート部材の両側の上記開口部
の周辺のコンクリートの面にエポキシ樹脂、不飽和ポリ
エステル樹脂などの強力樹脂接着剤を塗布し、その上に
新たにコンクリートを打継ぎして開口部の周辺の部材断
面を増大する板状膨出部を一体に造成することを特徴と
する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。[Claims] 1. Openings are formed by drilling through holes with a drilling machine at predetermined positions in reinforced concrete members that have already been constructed in the structure, and then around the openings on both sides of the reinforced concrete members. A new plate-shaped bulging part is created by pouring new concrete to increase the cross section of the member around the opening, and then, after the plate-shaped bulging part has hardened, several The insertion holes of PC steel rods are drilled in parallel to the above-mentioned through-holes,
A method for shear reinforcing an opening in a reinforced concrete member, which comprises inserting a PC steel rod into the insertion hole and fixing both ends of the rod under tension with nuts. 2. Use a drilling machine to drill through holes in the required positions of the already constructed reinforced concrete members of the structure to form openings, and then apply epoxy resin to the concrete surface around the openings on both sides of the reinforced concrete members. , is characterized by applying a strong resin adhesive such as unsaturated polyester resin and pouring new concrete on top of it to create a plate-shaped bulge that increases the cross section of the member around the opening. A shear reinforcement method for openings in reinforced concrete members.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9555378A JPS6058351B2 (en) | 1978-08-04 | 1978-08-04 | Shear reinforcement method for openings in reinforced concrete members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9555378A JPS6058351B2 (en) | 1978-08-04 | 1978-08-04 | Shear reinforcement method for openings in reinforced concrete members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5523236A JPS5523236A (en) | 1980-02-19 |
| JPS6058351B2 true JPS6058351B2 (en) | 1985-12-19 |
Family
ID=14140762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9555378A Expired JPS6058351B2 (en) | 1978-08-04 | 1978-08-04 | Shear reinforcement method for openings in reinforced concrete members |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6058351B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62131847U (en) * | 1986-02-14 | 1987-08-20 | ||
| JPS62218165A (en) * | 1986-03-19 | 1987-09-25 | Nec Corp | Thermal transfer recording and recording system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61266760A (en) * | 1985-05-20 | 1986-11-26 | 株式会社大林組 | Shearing reinfrcement method of opening part provided to reinforced concrete member |
| JP4547875B2 (en) * | 2003-07-16 | 2010-09-22 | 株式会社大林組 | Concrete reinforcing structure and reinforcing method |
-
1978
- 1978-08-04 JP JP9555378A patent/JPS6058351B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62131847U (en) * | 1986-02-14 | 1987-08-20 | ||
| JPS62218165A (en) * | 1986-03-19 | 1987-09-25 | Nec Corp | Thermal transfer recording and recording system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5523236A (en) | 1980-02-19 |
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