JPH10331436A - Earthquake-resisting reinforcing structure for beam-column in existing structure - Google Patents

Earthquake-resisting reinforcing structure for beam-column in existing structure

Info

Publication number
JPH10331436A
JPH10331436A JP15447797A JP15447797A JPH10331436A JP H10331436 A JPH10331436 A JP H10331436A JP 15447797 A JP15447797 A JP 15447797A JP 15447797 A JP15447797 A JP 15447797A JP H10331436 A JPH10331436 A JP H10331436A
Authority
JP
Japan
Prior art keywords
column
existing
steel plate
reinforcing
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.)
Pending
Application number
JP15447797A
Other languages
Japanese (ja)
Inventor
Koichi Tamura
幸一 田村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taisei Corp
Original Assignee
Taisei Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Taisei Corp filed Critical Taisei Corp
Priority to JP15447797A priority Critical patent/JPH10331436A/en
Publication of JPH10331436A publication Critical patent/JPH10331436A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To reinforce a column for an RC-constructed existing structure by a steel plate and concrete without anew installing a brace material and an earthquake-resisting wall into the existing structure while increasing the strength of beams-columns by reinforcing the end sections of beams. SOLUTION: In the reinforcing structure to a reinforced concrete-constructed existing beam-column 11, a column type steel plate 1 is divided into the plural in the vertical direction, the existing column 11 is surrounded by the column type steel plates 1 and the column type steel plates 1 are welded and joined mutually, and sections among the column type steel plates 1 and the existing column 11 are filled with fillters 9 to form a steel-plate concrete column A while the Joining sections of the steel-plate concrete column A and the existing beam 21 are unified and connected through reinforcing metal fittings D, in which rib plates 14 are fixed onto horizontal plates 15.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、コンクリ−ト系の
既存構築物に対する耐震補強構造に関するものであっ
て、建築物や、道路及び鉄道等の高架式構築物などに適
用する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic reinforcement structure for an existing concrete building, and is applied to a building, an elevated structure such as a road and a railway.

【0002】[0002]

【従来の技術】従来より、鉄筋コンクリ−ト(以下、R
Cと略す。)造や鉄骨鉄筋コンクリ−ト造の既存構築物
に対して耐震補強を行う場合は、通常柱に鉄筋を巻付け
てコンクリ−トを打ち増ししたり、繊維シ−トや鋼板を
巻き付けて補強を行っている。しかし、既存柱と梁を一
体とした補強は特に行われていなかった。
2. Description of the Related Art Conventionally, reinforced concrete (hereinafter referred to as R
Abbreviated as C. ) When performing seismic reinforcement for existing structures such as steel structures and steel reinforced concrete structures, reinforced concrete is usually wrapped around pillars to add concrete, or reinforced with fiber sheets or steel plates. Is going. However, the existing columns and beams were not integrally reinforced.

【0003】[0003]

【発明が解決しようとする課題】近年における構築物の
耐震に関する意識の高まりから、RC造の既存構築物に
対して、従来よりも大きな地震が発生した場合を想定し
た耐震補強を行う要請が強くなっている。このような大
地震に対する耐震補強に、前記従来の補強を既存のRC
柱に適用すると、その柱自体は耐震性を発揮するが、同
柱と接続する梁は、通常柱と一体の耐震補強は行われて
いないため、柱と対比して耐力不足になることがある。
そのため、大梁は大地震時に亀裂が発生する恐れがあ
る。
In recent years, there has been an increasing demand for seismic reinforcement of existing RC structures in anticipation of a case where a larger earthquake has occurred than before. I have. For the seismic reinforcement against such a large earthquake, the above-mentioned conventional reinforcement is applied to existing RC.
When applied to a column, the column itself exhibits seismic resistance, but the beam connected to the column is usually not reinforced with seismic reinforcement integrated with the column, so the strength may be insufficient compared to the column .
Therefore, there is a possibility that the girder will crack during a large earthquake.

【0004】[0004]

【本発明の目的】上記のような課題を解決するためにな
された本発明は、既存構築物内に新たにブレ−ス材や耐
震壁を設けることなく、RC造の既存構築物の柱を鋼板
とコンクリ−トにより補強すると共に、梁の端部を補強
して柱梁の耐力の向上を図ることができる、既存構築物
における柱梁の耐震補強構造を提供することにある。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. Accordingly, the present invention is not to provide a new bracing material or earthquake-resistant wall in the existing structure, but to use a steel plate as a pillar of the existing RC structure. It is an object of the present invention to provide a seismic retrofitting structure for an existing building that can be reinforced by concrete and reinforced at the end of the beam to improve the strength of the beam.

【0005】[0005]

【課題を解決するための手段】前記の目的を達成するた
めに、本発明は、鉄筋コンクリ−ト造の既存の柱梁に対
する補強構造であって、柱型鋼板を、平断面で見て、既
存柱の略対角線が延びる接合部で縦方向に複数に分割
し、同柱型鋼板により既存柱を囲んで柱型鋼板同士を溶
接接合し、同柱型鋼板と前記既存柱との間に充填材を充
填して鋼板コンクリ−ト柱を形成すると共に、鋼板コン
クリ−ト柱と既存梁の接合部を、水平板にリブ板を固着
した補強金具を介して一体接合したことを特徴とした、
既存構築物における柱梁の耐震補強構造にある。
In order to achieve the above object, the present invention relates to a reinforcing structure for an existing reinforced concrete column and beam, wherein a columnar steel plate is viewed from a flat cross section. The existing column is divided into a plurality of sections in the longitudinal direction at a substantially diagonal line extending, and the existing column is surrounded by the same column type steel plate, and the column type steel plates are welded to each other, and the space between the column type steel plate and the existing column is filled. Filling the material to form a steel plate concrete pillar, and jointing the steel plate concrete pillar and the existing beam with a horizontal metal plate with a reinforcing plate fixed to a rib plate.
It is in the seismic retrofit structure of columns and beams in existing structures.

【0006】[0006]

【発明の実施の形態】以下、図面を用いて本発明の実施
の形態を説明する。 <イ>前提条件 従来よりも大きな地震が発生した場合を想定した既存構
築物に対する耐震補強を行う場合に、本発明は、新たに
ブレ−ス材や耐震壁を設置することなく、短期間に、必
要且つ十分な耐震補強構造に改善するための要請に応え
るものである。本発明は、既存柱を補強して充填鋼板コ
ンクリ−ト柱を形成し、同コンクリ−ト柱と既存梁の接
合部に補強金具を介装して一体且つ強固に補強する。本
発明の実施例は、充填鋼板コンクリ−ト柱を中心にし
て、直交する両方向に既存梁が接続したときの梁端部の
補強状況が図1〜図4に示してあるが、構築物の骨組の
性状に応じて、一方向の梁、或いは特定の梁を補強対象
として行うことができるのは勿論であり、要は、柱とそ
の柱に接続する梁端部を一体且つ同時に耐震補強するこ
とが主旨である。
Embodiments of the present invention will be described below with reference to the drawings. <A> Prerequisites In the case where seismic retrofit is to be performed on existing structures assuming that a larger earthquake has occurred than before, the present invention can be implemented in a short period of time without installing new bracing materials or earthquake-resistant walls. It responds to the need to improve the necessary and sufficient seismic reinforcement structure. According to the present invention, an existing column is reinforced to form a filled steel plate concrete column, and a reinforcing metal is interposed at a joint between the concrete column and the existing beam to integrally and strongly reinforce the column. In the embodiment of the present invention, the reinforcement state of the beam end when the existing beam is connected in both directions perpendicular to each other with the filled steel plate concrete column as the center is shown in FIGS. Depending on the properties of the beam, it is of course possible to reinforce the beam in one direction or a specific beam, and the point is that the column and the beam end connected to the column are integrally and simultaneously reinforced with earthquake resistance. Is the gist.

【0007】<ロ>柱型鋼板の実施形態 柱型鋼板1,2,3は既存柱(RC柱)11を囲繞して
補強する鋼板で、その長さは同柱11の有効長さ、例え
ば、その階の床上端又は梁21上端から上階の梁22下
端までの高さとしている。 (a)図1及び図2に示す柱型鋼板1は、平面で見て、
円形鋼管を縦方向に2分割した半円形の鋼板で、既存柱
11の対角線X−Xが延びる接合部4で分割してある。
<B> Embodiments of Column Type Steel Plates The column type steel plates 1, 2, and 3 are steel plates surrounding and reinforcing an existing column (RC column) 11, the length of which is the effective length of the column 11, for example, And the height from the upper end of the floor or the beam 21 on the floor to the lower end of the beam 22 on the upper floor. (A) The columnar steel plate 1 shown in FIG. 1 and FIG.
It is a semicircular steel plate obtained by dividing a circular steel pipe into two in the vertical direction, and is divided at a joint 4 where a diagonal line XX of the existing column 11 extends.

【0008】(b)図3に示す柱型鋼板2は、角形鋼管
を柱の縦方向に2分割した略L形の鋼板である。この略
L形の鋼板2は、平面で見て、同角形鋼管のコ−ナ−近
傍のフラットな接合部5で2分割してある。
(B) The column-shaped steel plate 2 shown in FIG. 3 is a substantially L-shaped steel plate obtained by dividing a square steel pipe into two in the longitudinal direction of the column. This substantially L-shaped steel plate 2 is divided into two parts by a flat joint portion 5 near a corner of a square steel pipe when viewed in a plane.

【0009】(c)図4に示す柱型鋼板3は、4枚のス
キンプレ−ト13の各2枚を夫々溶接しL型に形成して
2分割してあり、既存柱11の対角線X−Xが延びる接
合部6で分割してある。
(C) The column-shaped steel plate 3 shown in FIG. 4 is formed by welding two of each of the four skin plates 13 to form an L-shape and is divided into two parts. It is divided at the junction 6 where X extends.

【0010】尚、前記の各柱型鋼板1,2,3は、2分
割した端面には同鋼板同士を溶接W接合するための開先
が形成してある。更に、開先の裏面には裏当て材を柱型
鋼板の一端に取付けておく(図示省略)。また、前記の
各柱型鋼板1,2,3は、2分割に限らず複数に分割
し、分割位置を限定するものではない。
Each of the column-shaped steel plates 1, 2, 3 has a groove for welding W-joining the steel plates to each other at two divided end faces. Further, a backing material is attached to one end of the columnar steel plate on the back surface of the groove (not shown). Further, each of the column-shaped steel plates 1, 2, and 3 is not limited to being divided into two, and may be divided into a plurality of parts, and the dividing position is not limited.

【0011】前記の各柱型鋼板1,2には、後述する補
強金具を取付けるためのボルト孔を明け、同柱型鋼板の
内側に、同ボルト孔に合わせて袋ナット20が装着して
ある。
A bolt hole is provided in each of the column-shaped steel plates 1 and 2 for mounting a reinforcing metal fitting to be described later, and a cap nut 20 is mounted inside the column-shaped steel plate in accordance with the bolt hole. .

【0012】<ハ>鋼板コンクリ−ト柱の実施形態 (a)円形の鋼板コンクリ−ト柱Aを図1及び図2に示
す。2分割した一対の半円形の柱型鋼板1,1により既
存柱11を囲繞する。その際、柱型鋼板1,1同士の接
合は、既存柱11の対角線X−Xが延びる接合部4,4
に位置するように設置して同柱型鋼板1,1同士を溶接
W接合している。同柱型鋼板1と既存柱11との間に充
填材g、例えばコンクリ−ト又はモルタルを充填して円
形の鋼板コンクリ−ト柱Aが形成してある。尚、7は既
存柱11の鉄筋、10及び12は夫々既存柱11の下階
柱及び上階柱である。
<C> Embodiment of Steel Plate Concrete Column (a) A circular steel plate concrete column A is shown in FIGS. The existing column 11 is surrounded by a pair of semicircular column-shaped steel plates 1 and 1 divided into two. At this time, the column-shaped steel plates 1 and 1 are joined to each other at joints 4 and 4 where the diagonal line XX of the existing column 11 extends.
And the same column-shaped steel plates 1 and 1 are welded to each other by welding. A filler g, for example, concrete or mortar, is filled between the column-type steel plate 1 and the existing column 11 to form a circular steel plate concrete column A. In addition, 7 is a reinforcing bar of the existing column 11, and 10 and 12 are a lower floor column and an upper floor column of the existing column 11, respectively.

【0013】(b)角形の鋼板コンクリ−ト柱Bを図3
に示す。角形鋼管を2分割した一対の略L形の柱型鋼板
2,2を既存柱11に対し相似形に囲繞する。その際、
柱型鋼板2,2同士の接合部5,5は、既存柱11の対
角線X−Xから若干離れて位置するように設置し、同柱
型鋼板2,2同士を溶接W接合している。同柱型鋼板2
と既存柱11との間に充填材gを充填して角形の鋼板コ
ンクリ−ト柱Bが形成してある。
(B) Square steel plate concrete pillar B is shown in FIG.
Shown in A pair of substantially L-shaped column-shaped steel plates 2 and 2 obtained by dividing a rectangular steel pipe into two are surrounded in a similar manner to the existing columns 11. that time,
The joints 5, 5 between the column-shaped steel plates 2, 2 are installed so as to be located slightly away from the diagonal line XX of the existing column 11, and the column-shaped steel plates 2, 2 are welded by W-joining. Column type steel plate 2
Filling material g is filled between the column 11 and the existing column 11 to form a square steel plate concrete column B.

【0014】(c)角形の鋼板コンクリ−ト柱Cを図4
に示す。2分割した一対のL形の柱型鋼板3,3を既存
柱11に対し相似形に囲繞する。その際、柱型鋼板3,
3同士の接合は、既存柱11の対角線X−Xが延びる接
合部6,6に位置するように設置して同柱型鋼板3,3
同士を溶接W接合している。 同柱型鋼板3と既存柱1
1との間に充填材gを充填して角形の鋼板コンクリ−ト
柱Cが形成してある。
(C) A square steel concrete pillar C is shown in FIG.
Shown in The pair of L-shaped column-shaped steel plates 3 and 3 which are divided into two are surrounded by a similar shape to the existing column 11. At that time,
The joints 3 are installed so as to be positioned at joints 6 and 6 where the diagonal line XX of the existing column 11 extends, and the column-type steel plates 3 and 3 are joined.
Are welded to each other. Column type steel plate 3 and existing column 1
1 is filled with a filler g to form a square steel plate concrete column C.

【0015】上記の各柱型鋼板1,2,3の接合部4,
5,6は、既存柱11の対角線X−X上に、又は対角線
X−Xから若干ずらして設置し、各柱型鋼板同士を溶接
W接合したことにより、後述の補強金具を各柱型鋼板
1,2,3に接合する際に、同各柱型鋼板1,2,3の
接合部4,5,6と干渉しないので取付けが容易とな
る。
The joints 4, 4 of the above-mentioned column-shaped steel plates 1, 2, 3
5, 6 are installed on the diagonal line XX of the existing column 11 or slightly displaced from the diagonal line XX, and the respective column-type steel plates are welded to each other by welding W, so that the reinforcing metal fittings to be described later are connected to the respective column-type steel plates. At the time of joining to the first, second, and third steel plates, they do not interfere with the joints 4, 5, and 6 of the respective column-shaped steel plates 1, 2, and 3, so that attachment becomes easy.

【0016】<ニ>補強金具の実施形態 (a)補強金具Dを図5に、同金具Dの設置状態を図1
及び図2に示す。補強金具Dは、円形の鋼板コンクリ−
ト柱Aと接続する上下の既存梁21,22の接合部に介
装して,同鋼板コンクリ−ト柱Aと梁21,22を一体
化する金具である。補強金具Dは、側面から見て直角三
角形状であって、三角を形成する水平板16、垂直板1
7、斜板15とそれらにより囲まれたリブ板14とから
溶接により構成してある。補強金具Dの垂直板17は、
円形の柱型鋼板1の外径に合わせて円弧状にしてある。
水平板16も同様に垂直板17側が円弧状である。補強
金具Dの水平板16及び垂直板17には、アンカ−18
材及びボルト19が貫通する孔(符号省略)が夫々に複
数個(図示では各2箇所)明けてある。また、垂直板1
7のボルト孔と対応して柱型鋼板1にも孔が明けてあり
(図示省略)、柱型鋼板1の孔位置に袋ナット20が装
着してある(図1,図2)。尚、28はアンカ−材18
のナットである。
<D> Embodiment of Reinforcing Bracket (a) FIG. 5 shows the reinforcing bracket D, and FIG.
And FIG. The reinforcing bracket D is a circular steel plate concrete.
This is a metal fitting interposed between the upper and lower existing beams 21 and 22 connected to the column A to integrate the steel plate concrete column A with the beams 21 and 22. The reinforcing bracket D has a right-angled triangular shape when viewed from the side, and has a horizontal plate 16 and a vertical plate 1 forming a triangle.
7. The swash plate 15 and the rib plate 14 surrounded by the swash plate 15 are formed by welding. The vertical plate 17 of the reinforcing bracket D is
It is formed in an arc shape according to the outer diameter of the circular columnar steel plate 1.
Similarly, the horizontal plate 16 has an arc shape on the vertical plate 17 side. The horizontal plate 16 and the vertical plate 17 of the reinforcing bracket D are provided with anchors 18.
A plurality of holes (symbols are omitted) through which the material and the bolt 19 pass are respectively formed (two places in the figure). Also, the vertical plate 1
A hole is also formed in the columnar steel plate 1 corresponding to the bolt hole 7 (not shown), and a cap nut 20 is mounted at the hole position of the columnar steel plate 1 (FIGS. 1 and 2). 28 is an anchor material 18
The nut.

【0017】(b)補強金具Eを図6に示す。補強金具
Eは、水平板16に直角三角形の2枚のリブ板14,1
4が間隔をおいて取付けてある。図示の補強金具Eは、
水平板16及びリブ板14,14の基端部が鋼板コンク
リ−ト柱Aの柱型鋼板1の側面にブラケット状に接合し
た場合である。この接合は予め柱型鋼板1に溶接接合す
ることが好ましい。補強金具Eの水平板16は、4本の
アンカ−材18及びナット28により梁21と接合して
ある。
(B) FIG. 6 shows the reinforcing bracket E. The reinforcing bracket E is provided on the horizontal plate 16 with two right-angled triangular rib plates 14 and 1.
4 are mounted at intervals. The illustrated reinforcing bracket E is
In this case, the base end portions of the horizontal plate 16 and the rib plates 14, 14 are joined to the side surfaces of the column-shaped steel plate 1 of the steel plate concrete column A in a bracket shape. This joining is preferably performed by welding to the column-shaped steel sheet 1 in advance. The horizontal plate 16 of the reinforcing bracket E is joined to the beam 21 by four anchor members 18 and nuts 28.

【0018】(c)補強金具Fを図3に示す。補強金具
Fは、角形の鋼板コンクリ−ト柱B又はCと既存梁2
1,22の接合部に介装して固着する金具である。補強
金具Fは補強金具Dと同形であって、垂直板17´と水
平板16´、斜板15´とそれらにより囲まれたリブ板
14´とから三角形状に構成してある。尚、その他は図
1及び図2と同一である。
(C) FIG. 3 shows the reinforcing bracket F. The reinforcing bracket F is composed of a square steel plate concrete column B or C and an existing beam 2.
It is a metal fitting that is interposed and fixed at the joints of the first and second joints. The reinforcing member F has the same shape as the reinforcing member D, and is formed in a triangular shape by a vertical plate 17 ', a horizontal plate 16', a swash plate 15 'and a rib plate 14' surrounded by them. The rest is the same as FIG. 1 and FIG.

【0019】(d)補強金具Gを図4に示す。補強金具
Gは、角形の鋼板コンクリ−ト柱C又はBと既存梁2
1,22の接合部に介装して固着する金具である。図示
の補強金具Gは補強金具Eと同形であって、水平板16
' 及びリブ板14´,14´の基端部が鋼板コンクリ−
ト柱C又はBの柱型鋼板3又は2の側面にブラケット状
に接合した場合である。この接合は予め柱型鋼板3又は
2に溶接接合することが好ましい。補強金具Eの水平板
16´は、4本のアンカ−材18及びナット28により
梁21と接合してある。
(D) FIG. 4 shows the reinforcing bracket G. The reinforcing bracket G is composed of a square steel plate concrete column C or B and an existing beam 2.
It is a metal fitting that is interposed and fixed at the joints of the first and second joints. The illustrated reinforcing bracket G has the same shape as the reinforcing bracket E, and has a horizontal plate 16.
'And the base ends of the rib plates 14', 14 'are steel plate concrete.
This is a case where the column-shaped steel plate 3 or 2 of the column C or B is joined in a bracket shape to the side surface. This joining is preferably performed by welding to the column-shaped steel plate 3 or 2 in advance. The horizontal plate 16 ′ of the reinforcing bracket E is joined to the beam 21 by four anchor members 18 and nuts 28.

【0020】(e)補強金具Hを図7に示す。補強金具
Hは、円形の鋼板コンクリ−ト柱Aと既存梁21,22
の接合部に介装して固着する金具である。補強金具H
は、下水平板26、垂直板27及び上水平板25とで、
側面から見てコの字型を形成し、上下水平板25,26
と垂直板27との間にリブ板24を取付けた構成になっ
ている。補強金具Hの下水平板26及び垂直板27に
は、アンカ−材18及びボルト19が挿通する孔が夫々
に複数個(図示では各4箇所)明けてある。補強金具H
の垂直板27は、円形の柱型鋼板1の外径に合わせて円
弧状にしてある。
(E) The reinforcing bracket H is shown in FIG. The reinforcing bracket H is made of a circular steel plate concrete column A and existing beams 21 and 22.
This is a metal fitting that is interposed and fixed at the joint of (1). Reinforcing bracket H
Is a lower horizontal plate 26, a vertical plate 27 and an upper horizontal plate 25,
A U-shape is formed when viewed from the side, and upper and lower horizontal plates 25 and 26 are formed.
And a vertical plate 27 with a rib plate 24 attached thereto. The lower horizontal plate 26 and the vertical plate 27 of the reinforcing metal H are provided with a plurality of holes (four in the drawing) through which the anchor members 18 and the bolts 19 are inserted. Reinforcing bracket H
Vertical plate 27 is formed in an arc shape in accordance with the outer diameter of the circular columnar steel plate 1.

【0021】前記補強金具Hは、角形の鋼板コンクリ−
ト柱B(又はC)と既存梁21,22の接合部に設置す
る場合は、垂直板27をフラットとし、また上下水平板
25,26の基端面をフラットにして用いる。尚、その
他は図5と同一にしてある。
The reinforcing bracket H is a square steel plate concrete.
When it is installed at the joint between the column B (or C) and the existing beams 21 and 22, the vertical plate 27 is made flat and the base end surfaces of the upper and lower horizontal plates 25 and 26 are made flat. The rest is the same as FIG.

【0022】(f)補強金具Iを図8に示す。補強金具
Iは、水平板26に長方形の2枚のリブ板24,24が
間隔をおいて取付けてある。補強金具Iは、水平板26
及びリブ板24,24の基端部が円形の鋼板コンクリ−
ト柱Aの柱型鋼板1の側面にブラケット状に接合した場
合である。水平板26は4本のアンカ−材18及びナッ
ト28により既存梁21と接合してある。
(F) FIG. 8 shows the reinforcing bracket I. The reinforcing bracket I has two rectangular rib plates 24, 24 attached to a horizontal plate 26 at an interval. The reinforcing bracket I is a horizontal plate 26
And a steel plate concrete in which the base ends of the rib plates 24, 24 are circular.
This is a case where the column A is joined to the side surface of the columnar steel plate 1 in a bracket shape. The horizontal plate 26 is joined to the existing beam 21 by four anchor members 18 and nuts 28.

【0023】前記補強金具Iは、角形の鋼板コンクリ−
ト柱B(又はC)と既存梁21,22の接合部に設置す
る場合は、水平板26及びリブ板24,24の基端面を
フラットにして用いる。尚、前記各補強金具のリブ板1
4,24は必要に応じて複数枚とする。
The reinforcing bracket I is a square steel plate concrete.
When it is installed at the joint between the pillars B (or C) and the existing beams 21 and 22, the horizontal plate 26 and the base plates of the rib plates 24 and 24 are flattened. In addition, the rib plate 1 of each of the reinforcing fittings
The numbers 4 and 24 are plural as required.

【0024】<ホ>補強金具と鋼板コンクリ−ト柱及び
既存梁との接合の形態 (a)補強金具Dを鋼板コンクリ−ト柱Aと既存梁2
1,22の接合部に取付けた場合を図1、図2及び図5
に示す。(後付工法) 図示によると、鋼板コンクリ−ト柱Aの形成後、同柱A
と梁21,22の接合部に補強金具Dが上下に各4個据
付けてある。その据付け方法は、先ず上部梁22の下面
及び下部梁21の上面にアンカ−材18をセットする。
アンカ−材18のセットは、彫込み又は打込みアンカ−
など公知の手段による。次いで、補強金具Dを、同金具
の水平板16が梁21,22に、垂直材17が鋼板コン
クリ−ト柱Aの柱型鋼板1に、夫々アンカ−材18及び
ボルト19により据付けてある。28はアンカ−材18
のナット、20はボルト19用の袋ナットである。更
に、柱型鋼板1に垂直材17を溶接接合してある。
<E> Form of joining of reinforcing metal to steel plate concrete column and existing beam (a) Reinforcement metal D is connected to steel plate concrete column A and existing beam 2
1, 2, and 5 show cases where the light emitting device is attached to the joints 1 and 22.
Shown in (Retrofitting method) According to the figure, after the steel plate concrete column A is formed, the column A
Four reinforcing brackets D are installed at the upper and lower sides of the joint between the beams 21 and 22, respectively. First, the anchor members 18 are set on the lower surface of the upper beam 22 and the upper surface of the lower beam 21.
The set of anchor materials 18 can be engraved or driven in.
By a known means. Next, the reinforcing member D is mounted on the horizontal plates 16 and the beams 21 and 22 and the vertical member 17 is mounted on the column-shaped steel plate 1 of the steel plate concrete column A by the anchor member 18 and the bolt 19, respectively. 28 is an anchor material 18
Reference numeral 20 denotes a cap nut for the bolt 19. Further, a vertical member 17 is welded to the columnar steel plate 1.

【0025】(b)補強金具Eを鋼板コンクリ−ト柱A
と既存梁21,22の接合部に取付けた場合を図6に示
す。(先付工法) 先ず、補強金具Eは、鋼板コンクリ−ト柱Aの形成前
に、予め柱型鋼板1にブラケット状に先付けしおてお
く。即ち、柱型鋼板1に補強金具Eの水平板16及び2
枚のリブ板14,14の基端部が溶接接合してある。次
いで、この補強金具Eを取付けた柱型鋼板1を、補強金
具Eが既存梁21,22に位置するようにして既存柱1
1を囲み、補強金具Eの水平板16及び既存梁21,2
2にアンカ−材18をセットしてナット28締めする。
次ぎに、柱型鋼板1,1同士を溶接Wし充填材により鋼
板コンクリ−ト柱Aを形成する。
(B) Reinforcing bracket E is made of steel plate concrete column A
FIG. 6 shows a case where the antenna is attached to the joint between the existing beams 21 and 22. (Pre-adhesive construction method) First, before forming the steel plate concrete column A, the reinforcing bracket E is pre-attached to the column-shaped steel plate 1 in a bracket shape. That is, the horizontal plates 16 and 2 of the reinforcing bracket E are
The base ends of the rib plates 14 are welded. Next, the column-shaped steel plate 1 to which the reinforcing metal fitting E is attached is moved so that the reinforcing metal fitting E is positioned on the existing beams 21 and 22.
1, the horizontal plate 16 of the reinforcing metal E and the existing beams 21 and
The anchor material 18 is set on the nut 2 and the nut 28 is tightened.
Next, the column-shaped steel plates 1 and 1 are welded to each other, and a steel plate concrete column A is formed with a filler.

【0026】(c)前記(a)と(b)の併用による接
合。鋼板コンクリ−ト柱Aの柱脚と下部梁21の接合部
に前記(b)の先付工法を用い、鋼板コンクリ−ト柱A
の柱頭と上部梁22の接合部に前記(a)の後付工法を
用いて接合してもよい。また上記を逆にして、鋼板コン
クリ−ト柱Aの柱頭と上部梁22の接合部に前記(b)
の先付工法を用い、鋼板コンクリ−ト柱Aの柱脚と下部
梁21の接合部に前記(a)の後付工法を用いて接合し
てもよい。
(C) Joining by using the above (a) and (b) together. At the joint between the column base of the steel plate concrete column A and the lower beam 21, the precast method shown in FIG.
May be joined to the joint between the capital and the upper beam 22 by using the retrofitting method (a). In addition, the above is reversed, and the above-mentioned (b) is attached to the joint portion between the column cap of the steel plate concrete column A and the upper beam 22.
And the lower beam 21 may be joined to the joint between the column base of the steel plate concrete column A and the lower beam 21 by using the post-installation method (a).

【0027】(d)角形の鋼板コンクリ−ト柱B(又は
C)の場合も、補強金具F,G,H,Iを用いて、前記
補強金具D,Eによる既存梁21,22と円形の鋼板コ
ンクリ−ト柱Aの接合の場合と同様に行うことができ
る。
(D) Also in the case of the square steel plate concrete pillar B (or C), the existing beams 21 and 22 by the reinforcing brackets D and E are formed by using the reinforcing brackets F, G, H and I. It can be performed in the same manner as in the case of joining the steel plate concrete column A.

【0028】(e)補強金具による接合の変化例として
下記のようにすることができる。補強金具D(図1,図
2,図5),F(図3),H(図7)において、垂直板
17,17´,27を省略し、水平板16,16´,2
6,25、リブ板14,14´,24及び斜板15,1
5´を予め柱型鋼板に溶接接合してもよい(先付工
法)。それによりボルト19及び袋ナット20が省略で
きる。
(E) An example of a change in the joining by the reinforcing metal can be as follows. In the reinforcing brackets D (FIGS. 1, 2 and 5), F (FIG. 3) and H (FIG. 7), the vertical plates 17, 17 'and 27 are omitted, and the horizontal plates 16, 16' and 2 are omitted.
6, 25, rib plates 14, 14 ', 24 and swash plate 15, 1
5 'may be welded to a columnar steel plate in advance (pre-adhesion method). Thereby, the bolt 19 and the cap nut 20 can be omitted.

【0029】(f)補強金具による接合の更なる変化例
として下記のようにすることができる。補強金具D(図
1,図2,図5),F(図3),H(図7)の垂直板1
7,17´,27を省略した補強金具、或いは補強金具
E(図6),G(図4),I(図8)を、鋼板コンクリ
−ト柱A,B,Cの柱頭柱脚と上下梁21,22の接合
部に据付けてもよい(後付工法)。その場合、前記各補
強金具D,E,F,G,H,Iにおける水平板16,1
6´,26,25は上下梁21,22のアンカ−18に
セットし、リブ板14,14´,24及び斜板15,1
5´は前記柱A,B,Cの柱型鋼板1,2,3に溶接接
合する。それによりボルト19及び袋ナット20が省略
できる。
(F) As a further modification example of the joining by the reinforcing metal, the following can be performed. Vertical plate 1 of reinforcing metal fittings D (FIGS. 1, 2 and 5), F (FIG. 3) and H (FIG. 7)
7, 17 'and 27 are omitted, or the reinforcing brackets E (FIG. 6), G (FIG. 4) and I (FIG. 8) are vertically attached to the column bases of the steel plate concrete columns A, B and C. It may be installed at the joint between the beams 21 and 22 (a retrofitting method). In that case, the horizontal plates 16, 1 in each of the reinforcing brackets D, E, F, G, H, I are used.
6 ', 26, 25 are set on the anchors 18 of the upper and lower beams 21, 22 and the rib plates 14, 14', 24 and the swash plates 15, 1 are set.
5 'is welded to the column-shaped steel plates 1, 2, 3 of the columns A, B, C. Thereby, the bolt 19 and the cap nut 20 can be omitted.

【0030】前記各補強金具の据付けに際し、同金具の
水平板16,26とRC梁21,22との接合面に隙間
が生じるときは、予めモルタルや樹脂等により平滑にす
るか、同金具を据付けた後に上記材料を隙間に注入する
ことにより密着性がよくなる。
When a gap is formed between the horizontal plates 16, 26 of the metal fittings and the RC beams 21, 22 when the reinforcing metal fittings are installed, the reinforcing metal fittings may be smoothed in advance using mortar or resin, or the metal fittings may be used. By injecting the above material into the gap after installation, the adhesion is improved.

【0031】また、前記各補強金具の各水平板及び垂直
板のアンカ−孔を長孔とすることにより、同金具の据付
け精度の調節が可能となる。
Further, by making the anchor holes of the horizontal plate and the vertical plate of each of the reinforcing members long, it is possible to adjust the installation accuracy of the metal members.

【0032】[0032]

【作用】[Action]

<イ>構築物の骨組に地震時の水平力が作用した時の梁
の応力及び曲げ耐力の比較を図9に示す。補強前の骨組
の設計用水平力がPのときの梁22の曲げモ−メントは
破線で示してある。その時、梁22のj−j面に最大モ
−メントM1 が、n−n面にM2が夫々生じる。補強後
の梁22の曲げモ−メントは実線で示してある。この
時、梁22のk−k面に最大モ−メントM1 ´が、n−
n面(非補強面)にM2 ´が夫々生じる。従って、この
最大モ−メントM1 ´(>M1 )により補強金具(例え
ばA)を設定し、梁22の曲げ耐力は非補強面のモ−メ
ントM2 ´(>M2 )により決まる。即ち、M2 ´=M
1 , M2 ´>M2 から補強後の骨組に作用する水平
力をP´(>P)とすれば
<B> FIG. 9 shows a comparison between the beam stress and the bending strength when a horizontal force during an earthquake acts on the frame of the structure. The bending moment of the beam 22 when the design horizontal force of the framework before reinforcement is P is indicated by a broken line. At that time, maximum j-j surface of the beam 22 mode - Instrument M 1 is, M 2 is respectively generated in the n-n plane. The bending moment of the reinforced beam 22 is shown by a solid line. At this time, the maximum moment M 1 ′ on the kk plane of the beam 22 is n−
M 2 ′ is generated on the n-plane (non-reinforced surface). Therefore, a reinforcing bracket (for example, A) is set by the maximum moment M 1 ′ (> M 1 ), and the bending strength of the beam 22 is determined by the moment M 2 ′ (> M 2 ) of the non-reinforced surface. That is, M 2 ′ = M
1 , the horizontal force acting on the reinforced frame from M 2 ′> M 2 is P ′ (> P)

【0033】 P´=P×M2 ´/M2 =P×M1 /M2 P ′ = P × M 2 ′ / M 2 = P × M 1 / M 2

【0034】故に、補強後の梁22の曲げ耐力は、補強
前のそれのM1 /M2 倍に改善される。尚、補強金具の
設置範囲は、梁端部から梁の内法スパンL0 の1/4以
内とすることが好ましい。
Therefore, the bending strength of the beam 22 after reinforcement is improved to M 1 / M 2 times that before reinforcement. Incidentally, the range of setting the metal fitting, it is preferably within 1/4 the inner size span L 0 of the beam from the beam end.

【0035】[0035]

【発明の効果】本発明は以上説明したようになるから次
のような効果を得ることができる。 <イ>既存のRC柱は、同柱の対角する縦方向に分割し
た鋼板により補強したことによって、充填鋼板コンクリ
−ト柱として機能し、柱の曲げ・剪断耐力が著しく向上
すると共に、補強柱と既存梁の接合部に補強金具の設置
が容易となり、既存梁は補強金具の方杖効果により曲げ
耐力が向上する。 <ロ>上記により、構築物内に、新たにブレ−ス材や耐
震壁を設けることなく、構築物の使用形態を変えずに耐
震性能の向上が図れる。 <ハ>既存梁は端部だけを補強するので、作業手間が少
なく施工期間の短縮、及びコストの低減が図れる。
As described above, the present invention has the following effects. <A> Existing RC columns function as filled steel plate concrete columns by reinforcing them with steel plates divided diagonally in the longitudinal direction of the same columns, significantly improving the bending and shear strength of the columns and reinforcing them. It is easy to install a reinforcing bracket at the joint between the column and the existing beam, and the bending strength of the existing beam is improved due to the brace effect of the reinforcing bracket. <B> As described above, the seismic performance can be improved without providing a new bracing material or an earthquake-resistant wall in the structure, and without changing the usage of the structure. <C> Since only the end of the existing beam is reinforced, the work is reduced and the construction period is shortened and the cost is reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明に係る、柱型鋼板により補強した円形
鋼板コンクリ−ト柱、及び第1実施例の補強金具の設置
状態の正面図
FIG. 1 is a front view of a circular steel plate concrete column reinforced by a column-type steel plate according to the present invention, and a reinforcing metal fitting of the first embodiment installed.

【図2】 図1の平断面図FIG. 2 is a plan sectional view of FIG.

【図3】(a) 柱型鋼板により補強した角形鋼板コン
クリ−ト柱、及び第3実施例の補強金具の設置状態の平
断面図
FIG. 3A is a cross-sectional plan view of a square steel plate concrete column reinforced with a column-type steel plate and a reinforcing bracket of the third embodiment installed.

【図3】(b) 上記(a)の部分断面図FIG. 3 (b) is a partial sectional view of the above (a).

【図4】(a) 他の角形鋼板コンクリ−ト柱、及び第
4実施例の補強金具の設置状態の平断面図
FIG. 4 (a) is a cross-sectional plan view showing the installation state of another square steel plate concrete pillar and the reinforcing bracket of the fourth embodiment.

【図4】(b) 上記(a)の部分断面図FIG. 4 (b) is a partial sectional view of the above (a).

【図5】 鋼板コンクリ−ト柱と梁の接合部に設置した
の第1実施例の補強金具の斜視図
FIG. 5 is a perspective view of a reinforcing bracket of the first embodiment installed at a joint between a steel plate concrete column and a beam.

【図6】 第2実施例の補強金具の斜視図FIG. 6 is a perspective view of a reinforcing bracket according to a second embodiment.

【図7】 第5実施例の補強金具の斜視図FIG. 7 is a perspective view of a reinforcing bracket according to a fifth embodiment.

【図8】 第6実施例の補強金具の斜視図FIG. 8 is a perspective view of a reinforcing bracket according to a sixth embodiment.

【図9】 耐震補強前と後の梁の作用力及び曲げ耐力の
比較説明図
FIG. 9 is an explanatory diagram for comparing the acting force and bending strength of the beam before and after the seismic reinforcement.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】鉄筋コンクリ−ト造の既存の柱梁に対する
補強構造であって、 柱型鋼板を縦方向に複数に分割し、 同柱型鋼板により既存柱を囲んで柱型鋼板同士を溶接接
合し、 同柱型鋼板と前記既存柱との間に充填材を充填して鋼板
コンクリ−ト柱を形成すると共に、鋼板コンクリ−ト柱
と既存梁の接合部を、補強金具を介して一体接合したこ
とを特徴とする、 既存構築物における柱梁の耐震補強構造。
Claims: 1. A reinforcing structure for an existing reinforced concrete column-beam, wherein a column-type steel plate is divided into a plurality of pieces in a longitudinal direction, and the column-type steel plate is surrounded by the column-type steel plate and welded to each other. A filler is filled between the column type steel plate and the existing column to form a steel plate concrete column, and a joint between the steel plate concrete column and the existing beam is integrated with a reinforcing metal fitting. A seismic reinforcement structure for columns and beams in existing structures, characterized by being joined.
【請求項2】請求項1に記載の既存構築物における柱梁
の耐震補強構造において、 柱型鋼板を、平断面で見て、既存柱の略対角線が延びる
接合部で縦方向に2分割したことを特徴とする、 既存構築物における柱梁の耐震補強構造。
2. The seismic strengthening structure of a column-beam in an existing structure according to claim 1, wherein the column-shaped steel plate is divided into two in a vertical direction at a joint where a substantially diagonal line of the existing column extends in a plan view. A seismic retrofit structure for columns and beams in existing structures.
【請求項3】請求項1又は2に記載の既存構築物におけ
る柱梁の耐震補強構造において、 補強金具は、水平板にリブ板を固着して構成したことを
特徴とする、 既存構築物における柱梁の耐震補強構造。
3. The column-beam in an existing structure according to claim 1 or 2, wherein the reinforcing member is formed by fixing a rib plate to a horizontal plate. Seismic reinforcement structure.
JP15447797A 1997-05-28 1997-05-28 Earthquake-resisting reinforcing structure for beam-column in existing structure Pending JPH10331436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15447797A JPH10331436A (en) 1997-05-28 1997-05-28 Earthquake-resisting reinforcing structure for beam-column in existing structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15447797A JPH10331436A (en) 1997-05-28 1997-05-28 Earthquake-resisting reinforcing structure for beam-column in existing structure

Publications (1)

Publication Number Publication Date
JPH10331436A true JPH10331436A (en) 1998-12-15

Family

ID=15585115

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15447797A Pending JPH10331436A (en) 1997-05-28 1997-05-28 Earthquake-resisting reinforcing structure for beam-column in existing structure

Country Status (1)

Country Link
JP (1) JPH10331436A (en)

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JP2008014028A (en) * 2006-07-06 2008-01-24 Asanuma Corp Existing column reinforcing method and its structure
ITVV20080007A1 (en) * 2008-07-15 2008-10-14 Michele Miceli STRUCTURAL ELEMENTS INCLINED TO ATTACK THE FEET OF THE PILLARS TO THE FOUNDATIONS TO IMPROVE THE RESISTANCE OF THE BUILDINGS TO THE EARTHQUAKES.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008014028A (en) * 2006-07-06 2008-01-24 Asanuma Corp Existing column reinforcing method and its structure
JP4616807B2 (en) * 2006-07-06 2011-01-19 株式会社淺沼組 Strengthening method and structure of existing pillars
CH699432B1 (en) * 2006-12-21 2010-03-15 Stahlton Ag Device for strengthening connection between column and surface element, particularly flat slab or foundation or intermediate floor, has flange element with brackets, where two brackets are arranged parallel to surface element
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JP2016183488A (en) * 2015-03-26 2016-10-20 一般社団法人 レトロフィットジャパン協会 Reinforcing structure for existing column
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