JPH0972102A - Reinforcing structure of beam, floor or wall of building - Google Patents
Reinforcing structure of beam, floor or wall of buildingInfo
- Publication number
- JPH0972102A JPH0972102A JP7247059A JP24705995A JPH0972102A JP H0972102 A JPH0972102 A JP H0972102A JP 7247059 A JP7247059 A JP 7247059A JP 24705995 A JP24705995 A JP 24705995A JP H0972102 A JPH0972102 A JP H0972102A
- Authority
- JP
- Japan
- Prior art keywords
- frp sheet
- main
- auxiliary
- sheet
- frp
- 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
Links
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 18
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 17
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 17
- 230000002787 reinforcement Effects 0.000 claims 3
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920006332 epoxy adhesive Polymers 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000012783 reinforcing fiber Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
- E04G2023/0262—Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off
Landscapes
- Working Measures On Existing Buildindgs (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、建築物の梁、床ま
たは壁のようなコンクリート構造物を繊維強化プラスチ
ックシートによって補強する構造に関する。TECHNICAL FIELD The present invention relates to a structure for reinforcing a concrete structure such as a beam, floor or wall of a building with a fiber reinforced plastic sheet.
【０００２】[0002]
【従来の技術】建築物の梁または床のようなコンクリー
ト構造物に繊維強化プラスチックシート（以下ＦＲＰシ
ートという）を接着してコンクリート構造物を補強する
場合、コンクリート構造物に働く曲げモーメントによっ
てＦＲＰシートの端部が剥離すると、その後、剥離がＦ
ＲＰシートの全体に及び、ＦＲＰシートによる補強効果
が急激に低下することが知られている（特開平6-193280
号公報）。2. Description of the Related Art When a fiber reinforced plastic sheet (hereinafter referred to as FRP sheet) is adhered to a concrete structure such as a beam or floor of a building to reinforce the concrete structure, the FRP sheet is generated by a bending moment acting on the concrete structure. When the end of the peels off, the peeling is F
It is known that the reinforcing effect of the FRP sheet is drastically reduced over the entire RP sheet (Japanese Patent Laid-Open No. 6-193280).
Issue).
【０００３】[0003]
【発明が解決しようとする課題】したがって、ＦＲＰシ
ートの端部がコンクリート構造物から剥離するのを防止
することは補強効果を維持し、コンクリート構造物の破
壊強度を所定に保つ上で重要である。Therefore, it is important to prevent the end portion of the FRP sheet from peeling off from the concrete structure in order to maintain the reinforcing effect and to keep the breaking strength of the concrete structure at a predetermined level. .
【０００４】本発明は、ＦＲＰシートの端部が梁、床ま
たは壁から剥離するのを防止し、これによってＦＲＰシ
ートの補強効果を永続させ、梁、床または壁の破壊強度
を所定に保つことができる、建築物の梁、床または壁の
補強構造を提供する。The present invention prevents the end of the FRP sheet from peeling off from the beam, floor or wall, thereby making the reinforcing effect of the FRP sheet permanent and maintaining the breaking strength of the beam, floor or wall at a predetermined level. Providing reinforced structures for building beams, floors or walls.
【０００５】[0005]
【課題を解決するための手段】本発明は、下側面と２つ
の側面とを有する建築物の梁の前記下側面に梁の軸線方
向へ伸びる主のＦＲＰシートを接着して梁を補強する構
造であって、前記主のＦＲＰシートの軸線方向の各端部
を覆う補助のＦＲＰシートを備える。補助のＦＲＰシー
トは、前記梁の下側面および２つの側面にわたる長さを
有し、前記主のＦＲＰシートと前記梁の２つの側面とに
接着される。SUMMARY OF THE INVENTION The present invention is a structure for reinforcing a beam by bonding a main FRP sheet extending in the axial direction of the beam to the lower side surface of a building beam having a lower side surface and two side surfaces. In addition, the auxiliary FRP sheet for covering the respective axial end portions of the main FRP sheet is provided. An auxiliary FRP sheet has a length on the lower side of the beam and spans two sides and is adhered to the main FRP sheet and the two sides of the beam.
【０００６】好ましい態様では、前記主のＦＲＰシート
の中央部を覆う第２の補助のＦＲＰシートを備える。第
２の補助のＦＲＰシートは、前記梁の下側面および２つ
の側面にわたる長さを有し、前記主のＦＲＰシートと前
記梁の２つの側面とに接着される。In a preferred mode, a second auxiliary FRP sheet covering the central portion of the main FRP sheet is provided. A second auxiliary FRP sheet has a length that spans the underside and two sides of the beam and is bonded to the main FRP sheet and the two sides of the beam.
【０００７】本発明はまた、建築物の床または壁の１つ
の面に一方向へ伸びる主のＦＲＰシートを接着して床ま
たは壁を補強する構造であって、前記主のＦＲＰシート
の前記一方向の各端部を覆う補助のＦＲＰシートを備え
る。補助のＦＲＰシートは、前記一方向に直行する方向
へ配置され、前記主のＦＲＰシートの端部に接着され
る。The present invention also has a structure for adhering a main FRP sheet extending in one direction to one surface of a floor or wall of a building to reinforce the floor or wall. An auxiliary FRP sheet covering each end of the direction is provided. The auxiliary FRP sheet is arranged in a direction orthogonal to the one direction and is bonded to an end portion of the main FRP sheet.
【０００８】[0008]
【作用および効果】曲げモーメントによって主のＦＲＰ
シートが引っ張られるが、主のＦＲＰシートの各端部は
補助のＦＲＰシートで覆われ、この補助のＦＲＰシート
に接着されているため、主のＦＲＰシートの端部は梁、
床または壁から剥離しない。[Action and effect] Main FRP by bending moment
Although the sheet is pulled, since each end of the main FRP sheet is covered with the auxiliary FRP sheet and adhered to this auxiliary FRP sheet, the end of the main FRP sheet is a beam,
Does not peel off floors or walls.
【０００９】主のＦＲＰシートの端部が建築物の梁、床
または壁から剥離しないため、梁、床または壁は、主の
ＦＲＰシートによって補強された状態を永続的に維持す
る。したがって、主のＦＲＰシートで補強されることに
より高められた所定の破壊強度を有することとなる。加
えて、補助のＦＲＰシートによって補強効果が高められ
る上、ＦＲＰシートを使用する補強構造であるため、施
工性や工期短縮性、経済性に優れ、作業性がよい。以上
の作用および効果は全ての発明に共通する。Since the ends of the main FRP sheet do not peel off from the beams, floors or walls of the building, the beams, floors or walls remain permanently reinforced by the main FRP sheet. Therefore, it has a predetermined breaking strength increased by being reinforced with the main FRP sheet. In addition, since the reinforcing effect is enhanced by the auxiliary FRP sheet, and because the reinforcing structure uses the FRP sheet, it is excellent in workability, work period shortening property, economical efficiency, and workability is good. The above operations and effects are common to all the inventions.
【００１０】請求項１に記載の発明によれば、補助のＦ
ＲＰシートがＵ字状に接着されているため、主のＦＲＰ
シートの端部を非常に堅固に拘束することができる。According to the invention of claim 1, the auxiliary F
Since the RP sheet is bonded in a U shape, the main FRP
The edges of the seat can be restrained very tightly.
【００１１】そして、請求項２に記載の発明によれば、
主のＦＲＰシートの端部だけでなく中央部を非常に堅固
に拘束することができる。梁に荷重が加わると、梁の中
央部の下側面に曲げひびわれが発生する結果、主のＦＲ
Ｐシートが中央部から端部に向けて剥離することがある
が、請求項２に記載の発明によれば、端部においてもま
た中央部においても、主のＦＲＰシートが梁から剥離す
るのを防止することができるAccording to the second aspect of the present invention,
Not only the ends but also the center of the main FRP sheet can be restrained very firmly. When a load is applied to the beam, bending cracks occur on the lower side surface of the center part of the beam, and as a result, the main FR
Although the P sheet may peel off from the central portion toward the end portion, according to the invention of claim 2, it is possible to prevent the main FRP sheet from peeling off from the beam at both the end portion and the central portion. Can be prevented
【００１２】請求項３に記載の発明によれば、床または
壁のような平板状のコンクリート構造物において、主の
ＦＲＰシートの端部が剥離するのを防止できる。According to the third aspect of the invention, in a flat concrete structure such as a floor or a wall, it is possible to prevent the end portion of the main FRP sheet from peeling off.
【００１３】[0013]
【発明の実施の形態】本発明に係る補強構造は、主のＦ
ＲＰシートを建築物の梁の下側面、床の下側面または壁
の外側面に接着して梁、床または壁を補強する。主のＦ
ＲＰシートは、繊維強化プラスチックの板またはプリプ
レグと呼称されるものを含むもので、炭素繊維、アラミ
ド繊維、ガラス繊維またはビニロン繊維のような強化繊
維を、エポキシ樹脂、不飽和ポリエステル樹脂またはポ
リウレタン樹脂のようなそれ自体公知の熱硬化性のマト
リックス樹脂に埋設して薄く形成される。強化繊維は繊
維メッシュとして、または繊維を一方向へ配列した繊維
集合体として埋設される。主のＦＲＰシートはコイル状
に巻き付けて、または積層して現場に搬入される。補助
のＦＲＰシートは主のＦＲＰシートと同じものを使用す
る。BEST MODE FOR CARRYING OUT THE INVENTION The reinforcing structure according to the present invention has a main F
The RP sheet is bonded to the lower surface of the beam, the lower surface of the floor or the outer surface of the wall of the building to reinforce the beam, floor or wall. Lord F
The RP sheet includes what is called a plate or prepreg made of fiber reinforced plastic, and is made of a reinforcing fiber such as carbon fiber, aramid fiber, glass fiber or vinylon fiber, which is made of epoxy resin, unsaturated polyester resin or polyurethane resin. It is thinly formed by embedding it in a thermosetting matrix resin known per se. The reinforcing fibers are embedded as a fiber mesh or a fiber aggregate in which fibers are arranged in one direction. The main FRP sheet is wound into a coil or laminated and carried to the site. The auxiliary FRP sheet is the same as the main FRP sheet.
【００１４】現場では、補強すべき梁、床または壁の表
面の下地処理をし、清掃する。梁、床または壁にひびわ
れや欠損箇所がある場合には、修復してから下地処理を
する。次いで、前記表面に、たとえばエポキシ系樹脂の
プライマを塗布し、コンクリートに浸透させる。その
後、プライマと同じ種類であるエポキシ系の接着剤を
梁、床または壁の表面に塗布し、主のＦＲＰシートを前
記表面に接着する。すなわち、補強すべきコンクリート
構造物が梁の場合には、梁の下側面に梁の軸線方向へ伸
びる主のＦＲＰシートを接着する。また、補強すべきコ
ンクリート構造物が床の場合には床の下側面に、壁の場
合には壁の外側面に一方向へ伸びる主のＦＲＰシートを
接着する。接着が完了した後、主のＦＲＰシートに硬化
剤を塗布して主のＦＲＰシートを硬化させる。主のＦＲ
Ｐシートの硬化が完了した後、または硬化が完了する前
に、補助のＦＲＰシートを主のＦＲＰシートの端部に接
着し、さらに、補助のＦＲＰシートを梁ではＵ字状に梁
に接着し、床または壁では主のＦＲＰシートの一方向に
直行する方向へ接着し、硬化させる。At the site, the surface of the beam, floor or wall to be reinforced is ground and cleaned. If the beam, floor or wall is cracked or missing, repair it before applying groundwork. Then, a primer of, for example, an epoxy resin is applied to the surface and impregnated with concrete. Then, an epoxy adhesive, which is the same type as the primer, is applied to the surface of the beam, floor or wall, and the main FRP sheet is adhered to the surface. That is, when the concrete structure to be reinforced is a beam, the main FRP sheet extending in the axial direction of the beam is bonded to the lower surface of the beam. If the concrete structure to be reinforced is a floor, the main FRP sheet that extends in one direction is bonded to the lower surface of the floor, and if it is a wall, to the outer surface of the wall. After the bonding is completed, a curing agent is applied to the main FRP sheet to cure the main FRP sheet. FR of the Lord
After the curing of the P sheet is completed or before the curing is completed, the auxiliary FRP sheet is adhered to the end portion of the main FRP sheet, and further, the auxiliary FRP sheet is adhered to the beam in a U shape in the beam. For floors or walls, the main FRP sheet is bonded and cured in a direction orthogonal to one direction.
【００１５】[0015]
【実施例】図１に示した補強構造は、下側面１１と２つ
の側面１２、１３とを有する建築物の梁１０の下側面１
１に梁の軸線方向へ伸びる主のＦＲＰシート１６を接着
して梁１０を補強するもので、補助のＦＲＰシート２０
を備える。主のＦＲＰシート１６および補助のＦＲＰシ
ート２０は、炭素繊維を一方向に配列した繊維集合体を
エポキシ系のマトリック樹脂に埋設して強化したもので
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The reinforcing structure shown in FIG. 1 comprises a lower surface 1 of a building beam 10 having a lower surface 11 and two side surfaces 12, 13.
The main FRP sheet 16 that extends in the axial direction of the beam is bonded to the beam 1 to reinforce the beam 10, and the auxiliary FRP sheet 20
Is provided. The main FRP sheet 16 and the auxiliary FRP sheet 20 are reinforced by embedding a fiber assembly in which carbon fibers are arranged in one direction in an epoxy-based matrix resin.
【００１６】補助のＦＲＰシート２０は、主のＦＲＰシ
ート１６の軸線方向の２つの端部１７のそれぞれを覆う
もので、梁１０の下側面１１および２つの側面１２、１
３にわたる長さを有する。The auxiliary FRP sheet 20 covers each of the two axial end portions 17 of the main FRP sheet 16, and includes a lower side surface 11 and two side surfaces 12, 1 of the beam 10.
It has a length of three.
【００１７】梁１０の下側面１１にエポキシ系のプライ
マを塗布し、さらにエポキシ系の接着剤を塗布し、主の
ＦＲＰシート１６を梁１０の下側面１１に接着する。そ
の後、梁１０の各端部、すなわち柱２２に隣接する部分
の２つの側面１２、１３にエポキシ系のプライマを塗布
し、さらに主のＦＲＰシート１６の端部１７と梁の２つ
の側面１２、１３とにエポキシ系の接着剤を塗布し、未
硬化の補助のＦＲＰシート２０を主のＦＲＰシート１６
の端部１７と梁の２つの側面１２、１３とに接着する。
接着した状態では、補助のＦＲＰシート２０の端部２１
が上階の床２４に達する長さにすることが好ましいが、
端部２１は梁１０の高さの半分程度まで伸ばせばよい。An epoxy-based primer is applied to the lower side surface 11 of the beam 10 and an epoxy-based adhesive is further applied to bond the main FRP sheet 16 to the lower side surface 11 of the beam 10. After that, an epoxy-based primer is applied to each end of the beam 10, that is, the two side faces 12 and 13 of the portion adjacent to the pillar 22, and further, the end 17 of the main FRP sheet 16 and the two side faces 12 of the beam, 13 is coated with an epoxy adhesive, and the uncured auxiliary FRP sheet 20 is used as the main FRP sheet 16
To the ends 17 and the two side faces 12 and 13 of the beam.
In the bonded state, the end portion 21 of the auxiliary FRP sheet 20 is
Is preferably long enough to reach the floor 24 on the upper floor,
The end portion 21 may be extended to about half the height of the beam 10.
【００１８】図示の実施例では、主のＦＲＰシート１６
の中央部１８を覆う第２の補助のＦＲＰシート２６を備
える。この補助のＦＲＰシート２６は、補助のＦＲＰシ
ート２０と同様に、梁１０の下側面１１および２つの側
面１２、１３にわたる長さを有し、主のＦＲＰシート１
６の中央部１８と梁の２つの側面１２、１３とに接着さ
れている。梁１０に荷重が加わると、梁１０は下方へた
わむが、このたわみによって梁１０の下側面１１から２
つの側面１２、１３に向けてひびわれが発生することが
ある。そして、ひびわれが発生すると、主のＦＲＰシー
ト１６がひびわれの箇所から端部１７に向けて剥離する
が、補助のＦＲＰシート２６を設けることによって主の
ＦＲＰシートの中央部を拘束して中央部の剥離を防止す
ることができる。In the illustrated embodiment, the main FRP sheet 16
And a second auxiliary FRP sheet 26 covering the central portion 18 of the. The auxiliary FRP sheet 26, like the auxiliary FRP sheet 20, has a length that extends over the lower side surface 11 and the two side surfaces 12, 13 of the beam 10 and is similar to the main FRP sheet 1.
It is adhered to the central part 18 of 6 and the two side faces 12, 13 of the beam. When a load is applied to the beam 10, the beam 10 bends downward.
A crack may occur toward one of the side surfaces 12 and 13. Then, when a crack is generated, the main FRP sheet 16 is peeled from the cracked portion toward the end portion 17, but by providing the auxiliary FRP sheet 26, the central portion of the main FRP sheet is restrained and the central portion of the central portion is cut off. Peeling can be prevented.
【００１９】図２に示した補強構造は、建築物の床３０
の下側面に一方向へ伸びる主のＦＲＰシート３２を接着
して床３０を補強する構造であって、主のＦＲＰシート
３２の前記一方向の各端部を覆う補助のＦＲＰシート３
４を備える。床３０をＦＲＰシートで補強する場合、一
般には、複数の所定幅のＦＲＰシート３２を隣り合せに
並べ、全てのＦＲＰシート３２が前記一方向へ伸びるよ
うに配列する。補助のＦＲＰシート３４は、前記一方向
に直行する方向へ配置され、主のＦＲＰシート３２の端
部に接着される結果、全てのＦＲＰシート３２が伸びて
いる方向に直交して位置することとなる。The reinforcing structure shown in FIG. 2 has a floor 30 of a building.
A structure that reinforces the floor 30 by adhering a main FRP sheet 32 extending in one direction to the lower side surface of the main FRP sheet 32, and an auxiliary FRP sheet 3 that covers each end of the main FRP sheet 32 in the one direction.
4 is provided. When the floor 30 is reinforced with FRP sheets, generally, a plurality of FRP sheets 32 having a predetermined width are arranged side by side, and all the FRP sheets 32 are arranged so as to extend in the one direction. The auxiliary FRP sheets 34 are arranged in a direction orthogonal to the one direction, and as a result of being bonded to the end portions of the main FRP sheets 32, all the FRP sheets 32 are positioned orthogonally to the extending direction. Become.
【００２０】床３０を主のＦＲＰシートで補強する場
合、主のＦＲＰシートを互いに直交する二方向に配列す
ることがある。すなわち、複数の主のＦＲＰシート３２
を図示の一方向へ、複数の主のＦＲＰシート３６を前記
一方向に直行する一方向へ配列する場合、主のＦＲＰシ
ート３２の端部を補助のＦＲＰシート３４で覆い、主の
ＦＲＰシート３６の端部を補助のＦＲＰシートで覆うよ
うにする。When the floor 30 is reinforced with the main FRP sheets, the main FRP sheets may be arranged in two directions orthogonal to each other. That is, the plurality of main FRP sheets 32
When arranging the plurality of main FRP sheets 36 in one direction orthogonal to the one direction in the drawing, the end portion of the main FRP sheet 32 is covered with the auxiliary FRP sheet 34, and the main FRP sheet 36 is Cover the edge of the sheet with an auxiliary FRP sheet.
【００２１】前記床３０についての実施例は、壁の場合
にも適用できる。壁の場合には、その外側面に主のＦＲ
Ｐシートを接着し、その端部を補助のＦＲＰシートで覆
うようにする。The embodiment of the floor 30 is also applicable to the case of walls. In the case of a wall, the outside FR is the main FR
The P sheet is adhered, and its end is covered with the auxiliary FRP sheet.
【００２２】ところで、ＦＲＰシートがコンクリート構
造物から剥離するのは、ＦＲＰシートとコンクリート構
造物との間にある接着剤が剥離するのではなく、コンク
リート構造物の表面部分がコンクリート構造物から剥離
する結果であると考えられる。すなわち、コンクリート
構造物の表面部分の付着力は接着剤の接着力より小さい
ため、ＦＲＰシートが引っ張り力を受けると、その引っ
張り力がＦＲＰシートの端部からコンクリート構造物の
表面部分に加わり、その表面部分がコンクリート構造物
から剥離する。そこで、補助のＦＲＰシート２０、２６
の端部が梁１０から剥離するのを防ぐために、図１に示
すように、アンカプレート４０をアンカボルト４２によ
って梁１０に固着しておき、補助のＦＲＰシート２０、
２６の端部をアンカプレート４０に接着することが好ま
しい。これは、特に、補助のＦＲＰシートに十分な長さ
をとることができない場合に有効である。By the way, the reason why the FRP sheet is peeled off from the concrete structure is not that the adhesive between the FRP sheet and the concrete structure is peeled off, but the surface portion of the concrete structure is peeled off from the concrete structure. Probably the result. That is, since the adhesive force of the surface portion of the concrete structure is smaller than the adhesive force of the adhesive, when the FRP sheet receives a tensile force, the tensile force is applied to the surface portion of the concrete structure from the end portion of the FRP sheet. The surface part peels off from the concrete structure. Therefore, the auxiliary FRP sheets 20, 26
In order to prevent the end portion of the beam from peeling off from the beam 10, the anchor plate 40 is fixed to the beam 10 by anchor bolts 42 as shown in FIG.
It is preferable to bond the ends of 26 to the anchor plate 40. This is particularly effective when the auxiliary FRP sheet cannot have a sufficient length.
【００２３】ＦＲＰシートは、図３に示すような荷重対
変位特性を有する。すなわち、荷重が大きくなるにつれ
て変位が大きくなり、Ａ1 の状態となる。ＦＲＰシート
の端部が点Ａ2 で剥離すると、結局、コンクリート構造
物は破断するため、その後荷重はＡ3 のように急激に低
下する。これに対して、ＦＲＰシートの端部が剥離しな
い場合には、ＦＲＰシートで補強したことによりＡ4 の
ように大きな荷重体変位特性が得られる。The FRP sheet has a load-displacement characteristic as shown in FIG. That is, the displacement increases as the load increases, and the state becomes A 1 . When the end portion of the FRP sheet peels off at the point A 2 , the concrete structure eventually breaks, and the load then sharply decreases like A 3 . On the other hand, when the end portion of the FRP sheet is not peeled off, a large load body displacement characteristic like A 4 can be obtained by reinforcing the FRP sheet.
【図１】本発明に係る建築物の梁の補強構造の実施例
で、（ａ）は軸線方向に沿って切断した断面図、（ｂ）
は軸線に直交する断面図である。FIG. 1 is an embodiment of a reinforcing structure for a building beam according to the present invention, in which (a) is a cross-sectional view taken along the axial direction, (b).
FIG. 4 is a cross-sectional view orthogonal to the axis.
【図２】本発明に係る建築物の床の補強構造の実施例を
示す底面図である。FIG. 2 is a bottom view showing an embodiment of a building floor reinforcing structure according to the present invention.
【図３】ＦＲＰシートの荷重対変位の特性図である。FIG. 3 is a characteristic diagram of load versus displacement of an FRP sheet.
１０、梁 １１ 下側面 １２、１３ 側面 １６、３２、３６ 主のＦＲＰシート ２０、２６、３４、３８ 補助のＦＲＰシート ３０ 床 10, beam 11 lower side surface 12, 13 side surface 16, 32, 36 main FRP sheet 20, 26, 34, 38 auxiliary FRP sheet 30 floor
───────────────────────────────────────────────────── フロントページの続き (72)発明者 林田 則光 茨城県つくば市大字鬼ヶ窪字下山1043番１ 株式会社熊谷組技術研究所内 (72)発明者 辻村 知明 茨城県つくば市大字鬼ヶ窪字下山1043番１ 株式会社熊谷組技術研究所内 (72)発明者 内藤 猛 静岡県駿東郡長泉町上土狩字高石234番地 東邦レーヨン株式会社研究所内 (72)発明者 安藤 正人 静岡県駿東郡長泉町上土狩字高石234番地 東邦レーヨン株式会社研究所内 (72)発明者 浅野 幸雄 新潟県上越市大字中田原１番地 株式会社 有沢製作所中田原工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norimitsu Hayashida 1043-1, Shimoyama, Onigakushi, Tsukuba-shi, Ibaraki Prefecture Kumagai Gumi Technical Research Institute, Inc. (72) Tomoaki Tsujimura Onigakubo, Tsukuba-shi, Ibaraki Prefecture Characters Shimoyama 1043-1 Kumagaya Gumi Technology Research Institute Co., Ltd. (72) Inventor Takeshi Naito 234 Takaishi Kamitokari, Nagaizumi-cho, Sunto-gun, Shizuoka Prefecture Toho Rayon Co., Ltd. Research Institute (72) Masato Ando Uesuchikari, Choizumi-cho, Sunto-gun, Shizuoka Prefecture Address 234 Takaishi, Toho Rayon Co., Ltd. (72) Inventor Yukio Asano 1 Nakatawara, Joetsu City, Niigata Prefecture Arizawa Manufacturing Nakatahara Plant
Claims (3)
梁の前記下側面に梁の軸線方向へ伸びる主の繊維強化プ
ラスチックシートを接着して梁を補強する構造であっ
て、前記主の繊維強化プラスチックシートの軸線方向の
各端部を覆う補助の繊維強化プラスチックシートを備
え、該補助の繊維強化プラスチックシートは、前記梁の
下側面および２つの側面にわたる長さを有し、前記主の
繊維強化プラスチックシートと前記梁の２つの側面とに
接着される、建築物の梁の補強構造。1. A structure for reinforcing a beam by adhering a main fiber-reinforced plastic sheet extending in an axial direction of the beam to the lower side surface of a building beam having a lower side surface and two side surfaces, A fiber reinforced plastic sheet covering each axial end of the fiber reinforced plastic sheet, the auxiliary fiber reinforced plastic sheet having a length over the lower side and two sides of the beam, A reinforcing structure for a building beam, which is adhered to the fiber-reinforced plastic sheet of claim 1 and two sides of the beam.
中央部を覆う第２の補助の繊維強化プラスチックシート
を備え、該第２の補助の繊維強化プラスチックシート
は、前記梁の下側面および２つの側面にわたる長さを有
し、前記主の繊維強化プラスチックシートと前記梁の２
つの側面とに接着される、請求項１に記載の建築物の梁
の補強構造。2. A second auxiliary fiber reinforced plastic sheet covering a central portion of the main fiber reinforced plastic sheet, wherein the second auxiliary fiber reinforced plastic sheet is provided on a lower surface and two side surfaces of the beam. The length of the main fiber-reinforced plastic sheet and the beam of 2
The reinforcement structure for a building beam according to claim 1, wherein the reinforcement structure is attached to one side surface.
へ伸びる主の繊維強化プラスチックシートを接着して床
または壁を補強する構造であって、前記主の繊維強化プ
ラスチックシートの前記一方向の各端部を覆う補助の繊
維強化プラスチックシートを備え、該補助の繊維強化プ
ラスチックシートは、前記一方向に直行する方向へ配置
され、前記主の繊維強化プラスチックシートの端部に接
着される、建築物の床または壁の補強構造。3. A structure for reinforcing a floor or wall by adhering a main fiber-reinforced plastic sheet extending in one direction to one surface of a floor or wall of a building, wherein the main fiber-reinforced plastic sheet is An auxiliary fiber-reinforced plastic sheet covering each end in one direction is provided, the auxiliary fiber-reinforced plastic sheet is arranged in a direction orthogonal to the one direction, and is adhered to an end of the main fiber-reinforced plastic sheet. Reinforcement structure of building floor or wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7247059A JPH0972102A (en) | 1995-09-01 | 1995-09-01 | Reinforcing structure of beam, floor or wall of building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7247059A JPH0972102A (en) | 1995-09-01 | 1995-09-01 | Reinforcing structure of beam, floor or wall of building |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0972102A true JPH0972102A (en) | 1997-03-18 |
Family
ID=17157815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7247059A Pending JPH0972102A (en) | 1995-09-01 | 1995-09-01 | Reinforcing structure of beam, floor or wall of building |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0972102A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002004759A3 (en) * | 2000-07-07 | 2002-04-25 | Josef Scherer | Reinforcement for construction surfaces |
| CN107816218A (en) * | 2017-10-28 | 2018-03-20 | 温州威泰建设有限公司 | A kind of bracing means and its construction method of beams of concrete and sheet material |
-
1995
- 1995-09-01 JP JP7247059A patent/JPH0972102A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002004759A3 (en) * | 2000-07-07 | 2002-04-25 | Josef Scherer | Reinforcement for construction surfaces |
| CN107816218A (en) * | 2017-10-28 | 2018-03-20 | 温州威泰建设有限公司 | A kind of bracing means and its construction method of beams of concrete and sheet material |
| CN107816218B (en) * | 2017-10-28 | 2019-11-12 | 温州威泰建设有限公司 | A kind of bracing means and its construction method of beams of concrete and plate |
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