JPH08120948A - Reinforcing structure for existing concrete structure - Google Patents
Reinforcing structure for existing concrete structureInfo
- Publication number
- JPH08120948A JPH08120948A JP6211209A JP21120994A JPH08120948A JP H08120948 A JPH08120948 A JP H08120948A JP 6211209 A JP6211209 A JP 6211209A JP 21120994 A JP21120994 A JP 21120994A JP H08120948 A JPH08120948 A JP H08120948A
- Authority
- JP
- Japan
- Prior art keywords
- existing
- carbon fiber
- tape
- fixing hole
- reinforcement
- 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.)
- Granted
Links
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
- Reinforcement Elements For Buildings (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、炭素繊維等と樹脂の
複合材料からなる高強度繊維複合補強材を使用して既設
のコンクリート構造物を補強する補強構造に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure for reinforcing an existing concrete structure by using a high-strength fiber composite reinforcing material made of a composite material of carbon fibers and the like.
【０００２】[0002]
【従来の技術】近年、既設の鉄筋コンクリート構造物等
においては、構造部材の経年変化による劣化のために、
設計時の性能を保持できなくなった構造物や、より優れ
た性能を必要とされる構造物が散見されるようになって
きた。具体的にいえば、耐震性能の向上を目的とした補
強や、構造部材の劣化に対する補修、あるいは構造物の
機能性の向上を目的とした補強などが実施されている。2. Description of the Related Art In recent years, in existing reinforced concrete structures, etc., due to deterioration due to aging of structural members,
Structures that cannot maintain the performance at the time of design, and structures that require better performance have come to be seen. Specifically, reinforcement for the purpose of improving the seismic performance, repair for deterioration of structural members, or reinforcement for the purpose of improving the functionality of structures have been implemented.
【０００３】このような既存の鉄筋コンクリート構造物
に対する補強技術としては、従来、次に述べるような工
法が一般的に採用されてきており、数多い実績を有して
いる。As a reinforcing technique for such an existing reinforced concrete structure, conventionally, the following construction methods have been generally adopted and have many achievements.
【０００４】(1) 鉄筋コンクリートの増打ち これは、既存の鉄筋コンクリート面に鉄筋コンクリート
を打ち足して断面増加を図る工法である。図３に示すの
は、既設受台Ａ，既設底版Ｂ，ＲＣ杭などからなる耐震
対象機器の基礎補強の例であり、既設受台Ａにおける増
設する部分に、異径鉄筋の下端を削孔に挿入して樹脂接
着剤で固定するいわゆる樹脂アンカー５０を植設し、こ
の樹脂アンカー５０に受台補強配筋（フープ筋）５１を
定着させている。既設底版Ｂにおける増設部分には底版
補強配筋５２を配設している。また、既設と新設のコン
クリート打継面には、全てチッピングを施して不良箇所
を取り除き、削孔に基端部を挿入するタイプの彫込アン
カー（ジベル）５３を多数取付けて一体化を図ってい
る。(1) Overfilling of reinforced concrete This is a construction method for adding reinforced concrete to an existing reinforced concrete surface to increase the cross section. Fig. 3 shows an example of the basic reinforcement of the seismic resistant equipment consisting of the existing pedestal A, the existing bottom slab B, RC piles, etc. In the existing pedestal A, the lower end of the rebar with different diameter is drilled. A so-called resin anchor 50, which is inserted into and is fixed with a resin adhesive, is planted, and a pedestal reinforcing bar (hoop bar) 51 is fixed to the resin anchor 50. A bottom slab reinforcing bar 52 is arranged in an additional portion of the existing bottom slab B. In addition, all existing and new concrete joint surfaces are chipped to remove defective parts, and a large number of engraving anchors (gibels) 53 of the type in which the base end is inserted into the drilling hole are attached to achieve integration. There is.
【０００５】図４に示すのは、既設底版Ｂに立設された
既設柱Ｃの例であり、既設受台Ａと同様に、樹脂アンカ
ー５０と、補強配筋（フープ筋）５１と、彫込アンカー
（ジベル）５３を使用している。FIG. 4 shows an example of an existing column C which is erected on an existing bottom slab B, and like the existing pedestal A, a resin anchor 50, a reinforcing bar (hoop bar) 51, and a carving. An embedded anchor (gibel) 53 is used.
【０００６】(2) 鋼板の貼付け これは、既存の鉄筋コンクリート面に鋼板を貼付け、曲
げ破壊に対する耐力の向上を図る工法である。図５に示
すのは、既設梁Ｄの下面に対する補強の例であり、鋼板
６０の貼着面にジベル６１を植設し、鋼板６０と既設梁
Ｄの境界面にエポキシ樹脂等の接着剤・シール材６２を
充填して接着し、一体化を図る。補強必要区間に対し
て両端部に必要な長さの定着区間を付加している。(2) Adhesion of steel plate This is a construction method for adhering a steel plate to an existing reinforced concrete surface to improve the proof strength against bending fracture. FIG. 5 shows an example of reinforcement for the lower surface of the existing beam D, in which a dowel 61 is planted on the bonding surface of the steel plate 60, and an adhesive such as epoxy resin is applied to the boundary surface between the steel plate 60 and the existing beam D. The sealing material 62 is filled and adhered to achieve integration. Fixing sections of the required length are added to both ends of the reinforcement necessary section.
【０００７】(3) 炭素繊維シートの貼付け これは、前記鋼板貼付工法における曲げに対する応力材
としてシート状の炭素繊維補強材を使用する工法であ
る。炭素繊維シート７０と既設梁Ｄのコンクリート表面
の接着はエポキシ樹脂接着剤７１を使用する。この場合
も、補強必要区間に対して所定長さの定着区間を加
えて、構造計算上必要な長さのシート貼付施工範囲を形
成している。(3) Bonding of carbon fiber sheet This is a method of using a sheet-like carbon fiber reinforcing material as a stress material against bending in the steel plate bonding method. An epoxy resin adhesive 71 is used to bond the carbon fiber sheet 70 and the concrete surface of the existing beam D. Also in this case, a fixing section having a predetermined length is added to the reinforcement necessary section to form a sheet sticking construction range having a length necessary for structural calculation.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、前述の
ような従来の工法は、一般的に次に示すような問題点を
抱えている。However, the above-mentioned conventional construction methods generally have the following problems.
【０００９】(1) 従来の鉄筋コンクリート増打工法や鋼
板貼付工法は、構造物としての機能性や施工時の作業性
の点で空間的な制約を受けることが多いという問題があ
り、また使用材料が多く、使用材料の自重が重いことな
どから、作業能率や作業安全性の面でも問題がある。(1) The conventional reinforced concrete hammering method and steel plate pasting method have a problem that they are often spatially restricted in terms of functionality as a structure and workability at the time of construction, and the material used. However, there is a problem in terms of work efficiency and work safety because the weight of the materials used is heavy.
【００１０】(2) 鋼板貼付工法や炭素繊維シート貼付工
法は、補強必要区間に定着区間を加え貼付区間を広げる
ことによって定着域を確保しているが、施工対象区間が
冗長になりがちであり、さらに柱〜梁の接合部分などの
ような部材変化点に使用する場合には有効な定着域を確
保することができず、適用が困難となる。(2) In the steel plate pasting method and the carbon fiber sheet pasting method, the fixing area is secured by adding the fixing section to the reinforcement required section to widen the sticking section, but the section to be constructed tends to be redundant. Further, when it is used at a member change point such as a joint portion of a pillar and a beam, an effective fixing area cannot be secured, which makes application difficult.
【００１１】なお、炭素繊維シート貼付工法で定着区間
を短縮する手段として、特開平４−１８９９７７号公報
に既存コンクリート躯体の補強構造が提案されている。
これは、図６に示すように、柱や梁などの既存コンクリ
ート躯体表面に、炭素繊維やアラミド繊維などからなる
テープ状あるいはシート状の高強度長繊維補強材８０を
繊維配向方向がコンクリート躯体長手方向に沿うように
添設し、この高強度長繊維補強材８０の両端部のみを接
着剤によりコンクリート躯体に固着してなる補強構造に
おいて、前記固着区間のコンクリート躯体の表面に、段
差部（ストランド状またはテープ状の高強度長繊維補強
材による凸部，モルタルを介して取付けた樹脂やステン
レス鋼板からなる凸部，削製された凹溝）８１を形成
し、この段差部８１の上に前記高強度長繊維補強材８０
を重ねて貼着し、さらにこの高強度長繊維補強材８０の
上に、ストランド状またはテープ状の高強度長繊維補強
材８２を繊維配向方向を周方向（コンクリート躯体長手
方向に直交する方向）に沿わせて配設し、高強度長繊維
補強材８０を湾曲させて段差部８１に係止させるもので
ある。As a means for shortening the fixing section in the carbon fiber sheet sticking method, Japanese Patent Laid-Open No. 4-189977 proposes a reinforcing structure for an existing concrete skeleton.
As shown in FIG. 6, a tape-like or sheet-like high-strength long-fiber reinforcing material 80 made of carbon fiber or aramid fiber is attached to the surface of an existing concrete skeleton such as a pillar or a beam in the direction of the length of the concrete skeleton. In a reinforcing structure which is installed along the direction and in which only both ends of the high-strength long-fiber reinforcing material 80 are fixed to the concrete body with an adhesive, a step portion (strand) is formed on the surface of the concrete body in the fixing section. -Shaped or tape-shaped high-strength long-fiber reinforcing material-shaped convex portions, convex portions made of resin or stainless steel plate attached via mortar, and machined concave grooves) 81 are formed, and High strength long fiber reinforcement 80
Are laminated and adhered, and a strand-shaped or tape-shaped high-strength long-fiber reinforcing material 82 is further laminated on the high-strength long-fiber reinforcing material 80 in the circumferential direction (direction orthogonal to the longitudinal direction of the concrete frame). The high-strength long-fiber reinforcing material 80 is curved and locked to the step portion 81.
【００１２】このような補強構造であれば、高強度長繊
維補強材８０に作用する張力は、その両端部における接
着剤の剪断耐力に加えて、段差部による係止力が負担す
るので、固着区間を短縮することができ、全長が短いコ
ンクリート躯体でも所望の補強強度が得られ、また施工
が容易となるが、この場合でも柱〜梁などの接合部分の
ような部材変化点の補強に適用することができない。With such a reinforcing structure, the tension acting on the high-strength long-fiber reinforcing material 80 is borne by the locking force due to the step portion in addition to the shearing resistance of the adhesive at both ends thereof, so that the fixing is performed. The section can be shortened, the desired reinforcement strength can be obtained even with a concrete skeleton with a short total length, and the construction is easy, but even in this case, it is applied to the reinforcement of the member change points such as the joints of columns and beams. Can not do it.
【００１３】この発明は、前述のような問題点を解消す
べくなされたもので、その目的は、空間的な制約を受け
ることがなく、施工が容易で作業性・作業安全性などに
優れ、しかも柱〜梁の接合部など定着区間を確保できな
い場合に容易に適用できる既設コンクリート構造物の補
強構造を提供することにある。The present invention has been made to solve the above-mentioned problems, and its purpose is to be free from spatial restrictions, easy to construct, and excellent in workability and work safety. Moreover, it is to provide a reinforcing structure of an existing concrete structure that can be easily applied when a fixing section such as a joint between a pillar and a beam cannot be secured.
【００１４】[0014]
【課題を解決するための手段】本発明は、既設コンクリ
ート構造物のコンクリート躯体表面に、高強度繊維複合
補強材（炭素繊維，アラミド繊維などの長繊維とエポキ
シ樹脂などの樹脂からなる複合材料）を貼着し、この高
強度繊維複合補強材とコンクリート躯体とを一体化させ
ることにより補強する既設コンクリート構造物の補強構
造において、図１，図２に示すように、交差して接合さ
れているコンクリート躯体（例えば装置基礎の既設受台
Ａと既設受台Ｂ、あるいは既設柱Ｃと既設梁Ｄ）の一方
のコンクリート躯体の表面に、炭素繊維テープ１などの
テープ状の高強度繊維複合補強材をこのコンクリート躯
体の長手方向に沿って貼着し、他方のコンクリート躯体
に穿設された挿入固定孔２に前記テープ状高強度繊維複
合補強材の端部を挿入し、この挿入固定孔２にエポキシ
樹脂などの接着剤３を充填することにより前記テープ状
高強度繊維複合補強材の端部を固着する。The present invention provides a high-strength fiber composite reinforcing material (composite material consisting of long fibers such as carbon fibers and aramid fibers and resin such as epoxy resin) on the surface of a concrete skeleton of an existing concrete structure. In the reinforcing structure of an existing concrete structure, in which the high-strength fiber composite reinforcing material and the concrete skeleton are integrated to reinforce the existing concrete structure, as shown in FIG. 1 and FIG. On the surface of one of the concrete skeletons (for example, the existing pedestal A and the existing pedestal B of the equipment foundation, or the existing pillar C and the existing beam D), a tape-shaped high-strength fiber composite reinforcement material such as a carbon fiber tape 1 is provided on the surface of the concrete skeleton. Is adhered along the longitudinal direction of this concrete skeleton, and the end portion of the tape-shaped high-strength fiber composite reinforcing material is inserted into the insertion fixing hole 2 formed in the other concrete skeleton. Type to secure the ends of the tape-like high-strength fiber composite reinforcement by filling the adhesive 3 such as epoxy resin to the insertion fixing hole 2.
【００１５】テープ状高強度繊維複合補強材は、その両
端部を挿入固定孔２にそれぞれ挿入してエポキシ樹脂な
どの接着剤３により固着してもよいし、例えば既設受台
Ａの場合には、一端部を挿入固定孔２とエポキシ樹脂な
どの接着剤３による固着とし、他端部は炭素繊維シート
４などのシート状高強度繊維複合補強材によるフープ巻
きで定着する。The tape-shaped high-strength fiber composite reinforcing material may be inserted at both ends into the insertion fixing holes 2 and fixed by an adhesive 3 such as an epoxy resin. For example, in the case of an existing pedestal A, , One end is fixed to the insertion fixing hole 2 with an adhesive 3 such as an epoxy resin, and the other end is fixed by hoop winding with a sheet-like high strength fiber composite reinforcing material such as a carbon fiber sheet 4.
【００１６】[0016]
【作用】以上のような構成において、薄くて細長い炭素
繊維テープ１などのテープ状高強度繊維複合補強材を使
用して補強するため、施工に際して空間的な制約を受け
ることがなく、軽量でハンドリング性が良いなどから、
作業能率，作業安全性の向上を図れる。また、補強完成
後における構造物の断面変化が僅少であり、また死荷重
の増加も無視できるので、構造系の変化を伴うことはな
い。With the above-mentioned structure, since the tape-shaped high-strength fiber composite reinforcing material such as the thin and long carbon fiber tape 1 is used for reinforcement, there is no space restriction during the construction, and it is lightweight and easy to handle. Because of the good nature,
Work efficiency and work safety can be improved. Further, since the cross-section change of the structure after the completion of reinforcement is slight and the increase of dead load can be ignored, the structure system is not changed.
【００１７】テープ状高強度繊維複合補強材の端部を挿
入固定孔２に挿入してエポキシ樹脂などの接着剤３によ
り固着するため、柱〜梁や，受台〜底版などの接合部に
おいて定着区間を確保できない場合に容易に適用でき
る。さらに、シート状の応力材を挿入固定する場合に
は、相手側のコンクリート躯体の主筋を切断して打設す
ることになり、有効な補強とはなり得ないが、テープ状
高強度繊維複合補強材であれば、薄く幅が小さいため、
前述のような心配がなく、有効な補強をなし得る。Since the end portion of the tape-shaped high-strength fiber composite reinforcing material is inserted into the insertion fixing hole 2 and fixed by the adhesive 3 such as epoxy resin, it is fixed at the joint portion such as the pillar-beam or the pedestal-bottom plate. It can be easily applied when a section cannot be secured. Furthermore, when inserting and fixing a sheet-shaped stress material, the main reinforcement of the concrete frame on the other side is cut and placed, which cannot be effective reinforcement, but tape-shaped high-strength fiber composite reinforcement If the material is thin, the width is small,
Without the above-mentioned concerns, effective reinforcement can be achieved.
【００１８】なお、テープ状高強度繊維複合補強材はあ
る程度の剛性を有しているので、挿入固定孔２に容易に
挿入することができる。Since the tape-shaped high strength fiber composite reinforcing material has a certain degree of rigidity, it can be easily inserted into the insertion fixing hole 2.
【００１９】テープ状高強度繊維複合補強材の他端部を
シート状高強度繊維複合補強材で定着する場合には、テ
ープ状高強度繊維複合補強材が薄いため確実に巻き付け
ることができ、またフープ効果により定着効果が大きく
なり、定着長を低減することができる。When the other end of the tape-shaped high-strength fiber composite reinforcement material is fixed with the sheet-shaped high-strength fiber composite reinforcement material, the tape-shaped high-strength fiber composite reinforcement material can be reliably wound because it is thin. The fixing effect is increased by the hoop effect, and the fixing length can be reduced.
【００２０】[0020]
【実施例】以下、この発明を図示する一実施例に基づい
て説明する。図１は、石油精製工場における耐震対象機
器の基礎の既設受台Ａに適用した補強例である。既設受
台Ａは既設底版Ｂの上に計４つ突設されており、既設受
台Ａのの領域が既設断面において耐震補強が必要とさ
れる領域であり、の領域が受台〜底版の接合部分、即
ち部材変化点における定着領域である。の領域は部材
の途中における通常の定着領域である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an illustrated embodiment. FIG. 1 is an example of reinforcement applied to an existing pedestal A of a base of equipment to be seismic resistant in an oil refinery. A total of four existing pedestals A are projected on the existing slab B. The area of the existing pedestal A is the area where seismic reinforcement is required in the existing cross section, and the area of the pedestal to the slab is It is a joining portion, that is, a fixing area at a member change point. The area is a normal fixing area in the middle of the member.
【００２１】このような構造において、テープ長手方向
に配向された炭素長繊維にエポキシ樹脂を含浸させた、
例えば幅２ｃｍ，厚さ０．２ｃｍ程度（設計強度約４０
００ｋｇ／本）の炭素繊維テープ１を使用し、この炭素
繊維テープ１を既設受台Ａの４側面にそれぞれ複数本添
設する。また、この炭素繊維テープ１は、その繊維配向
方向、即ちテープ長手方向が既設受台Ａの上下方向に沿
うように添設し、既設受台Ａの上端から定着領域の下
端まで延在する長さとし、側面における横方向には所定
の間隔をおいて配設する。In such a structure, long carbon fibers oriented in the longitudinal direction of the tape are impregnated with an epoxy resin,
For example, a width of about 2 cm and a thickness of about 0.2 cm (design strength of about 40 cm
(00 kg / piece) of carbon fiber tape 1 is used, and a plurality of carbon fiber tapes 1 are attached to each of the four side surfaces of the existing pedestal A. Further, the carbon fiber tape 1 is attached so that its fiber orientation direction, that is, the tape longitudinal direction is along the vertical direction of the existing pedestal A, and extends from the upper end of the existing pedestal A to the lower end of the fixing area. The side surfaces are arranged at a predetermined distance in the lateral direction.
【００２２】既設底版Ｂには、既設受台Ａの側面に連続
するような挿入固定孔２を削孔する。この挿入固定孔２
は、断面円形あるいは長方形とし、炭素繊維テープ１の
幅より若干大きめの径あるいは横幅とし、また深さは２
００ｍｍ程度として充分な定着領域が得られるように
する。このような挿入固定孔２に炭素繊維テープ１の下
端部を挿入した後、エポキシ樹脂系接着剤３を充填して
固化させることにより、炭素繊維テープ１の下端部を定
着させる。The existing bottom slab B is provided with an insertion fixing hole 2 continuous with the side surface of the existing pedestal A. This insertion fixing hole 2
Has a circular or rectangular cross section, has a diameter or width slightly larger than the width of the carbon fiber tape 1, and has a depth of 2
It is set to about 00 mm so that a sufficient fixing area can be obtained. After the lower end portion of the carbon fiber tape 1 is inserted into the insertion fixing hole 2 as described above, the epoxy resin adhesive 3 is filled and solidified to fix the lower end portion of the carbon fiber tape 1.
【００２３】定着領域には、縦横に配向された炭素長
繊維にエポキシ樹脂を含浸させた炭素繊維シート４を使
用し、この炭素繊維シート４を炭素繊維テープ１の上か
らフープ巻きし、接着剤で定着させる。In the fixing area, a carbon fiber sheet 4 obtained by impregnating longitudinally and transversely oriented carbon long fibers with an epoxy resin is used. The carbon fiber sheet 4 is wound on the carbon fiber tape 1 by a hoop to form an adhesive. Fix with.
【００２４】以上のような構成において、次のように既
設受台Ａへの補強工法を行う。With the above structure, a method of reinforcing the existing pedestal A is performed as follows.
【００２５】(1) 既設受台Ａの周囲の土を排除し、既設
受台Ａの４側面の洗浄と研磨を行う。(1) The soil around the existing pedestal A is removed, and the four side surfaces of the existing pedestal A are cleaned and polished.
【００２６】同時に既設底版Ｂには挿入固定孔２を穿設
する。この挿入固定孔２は炭素繊維テープ１に対応した
小さな孔であり、適当な位置を選択することにより、既
設底版Ｂの主筋を切断することがない。At the same time, an insertion fixing hole 2 is formed in the existing bottom slab B. This insertion fixing hole 2 is a small hole corresponding to the carbon fiber tape 1, and by selecting an appropriate position, the main bar of the existing bottom plate B is not cut.
【００２７】(2) 工場または現場において、炭素繊維に
樹脂を含浸させて圧着成型した炭素繊維テープ１と炭素
繊維シート４を用意し、炭素繊維テープ１を既設受台Ａ
の４側面に貼付する。(2) A carbon fiber tape 1 and a carbon fiber sheet 4 in which carbon fibers are impregnated with resin and pressure-molded are prepared in a factory or on-site, and the carbon fiber tape 1 is installed on an existing cradle A.
Attach it to the four sides.
【００２８】(3) 炭素繊維テープ１は上端部を定着領域
の部分において既設受台Ａに定着させておき、この状
態で炭素繊維テープ１の下端部を挿入固定孔２に挿入す
る。ここで、炭素繊維テープ１はある程度の剛性を有し
ているので、挿入固定孔２に容易に挿入することができ
る。(3) The carbon fiber tape 1 has its upper end fixed to the existing pedestal A in the fixing region, and the lower end of the carbon fiber tape 1 is inserted into the insertion fixing hole 2 in this state. Here, since the carbon fiber tape 1 has a certain degree of rigidity, it can be easily inserted into the insertion fixing hole 2.
【００２９】(4) 挿入固定孔２内にエポキシ樹脂系接着
剤３を充填して炭素繊維テープ１の下端部を定着させ
る。(4) The insertion fixing hole 2 is filled with the epoxy resin adhesive 3 to fix the lower end portion of the carbon fiber tape 1.
【００３０】(5) 炭素繊維シート４を定着領域におい
て炭素繊維テープ１の上端部の上からフープ巻きにし、
接着剤で定着させる。ここで、炭素繊維テープ１は薄く
細長い部材であり、この上から炭素繊維シート４を巻き
付けてもアンボンドになる可能性は少なく、炭素繊維テ
ープ１を既設受台Ａに強固に定着させることができる。(5) The carbon fiber sheet 4 is wound in a hoop from the upper end of the carbon fiber tape 1 in the fixing area,
Fix with adhesive. Here, the carbon fiber tape 1 is a thin and long member, and even if the carbon fiber sheet 4 is wound on it, there is little possibility of becoming an unbond, and the carbon fiber tape 1 can be firmly fixed to the existing cradle A. .
【００３１】さらに、これに炭素繊維シート４のフープ
効果が加わり、定着長を低減することができる。Furthermore, the hoop effect of the carbon fiber sheet 4 is added to this, and the fixing length can be reduced.
【００３２】なお、以上は既設受台Ａの補強について説
明したが、既設底版Ｂの補強や柱〜梁の接合部の補強な
どにも適用できることはいうまでもない。既設底版Ｂの
場合には、図２（ａ）に示すように、既設受台Ａに水平
な挿入固定孔２を穿設し、あるいは既設定盤Ｂに斜めの
挿入固定孔２を穿設するなどし、この挿入固定孔２に炭
素繊維テープ１の両端部をそれぞれ挿入し、エポキシ樹
脂系接着剤３で定着させる。Although the reinforcement of the existing pedestal A has been described above, it goes without saying that it can also be applied to the reinforcement of the existing bottom slab B, the reinforcement of the column-beam joint, and the like. In the case of the existing bottom slab B, as shown in FIG. 2A, a horizontal insertion fixing hole 2 is bored in the existing pedestal A, or an oblique insertion fixing hole 2 is bored in the preset board B. Then, both ends of the carbon fiber tape 1 are inserted into the insertion fixing holes 2 and fixed with the epoxy resin adhesive 3.
【００３３】柱〜梁の接合部の場合も、図２（ｂ）に示
すように、既設柱Ｃに水平な挿入固定孔２を穿設し、こ
の挿入固定孔２に炭素繊維テープ１の一端部を挿入し、
エポキシ樹脂系接着剤３で定着させる。炭素繊維テープ
１の他端部は、炭素繊維シート４によるフープ巻きで定
着し、あるいは挿入固定孔２とエポキシ樹脂系接着剤３
による定着などとする。Also in the case of a column-beam joint, as shown in FIG. 2B, a horizontal insertion fixing hole 2 is bored in the existing column C, and one end of the carbon fiber tape 1 is inserted into this insertion fixing hole 2. Insert the section,
Fix with the epoxy resin adhesive 3. The other end of the carbon fiber tape 1 is fixed by hoop winding with the carbon fiber sheet 4, or the insertion fixing hole 2 and the epoxy resin adhesive 3
For example, by fixing.
【００３４】[0034]
【発明の効果】前述の通り、この発明は、交差して接合
されているコンクリート躯体の一方のコンクリート躯体
表面に、高強度繊維テープをこのコンクリート躯体の長
手方向に沿って貼着し、他方のコンクリート躯体に穿設
された挿入固定孔に前記高強度繊維テープの端部を挿入
し、この挿入固定孔に接着剤を充填して固着するように
したため、次のような効果を奏する。As described above, according to the present invention, the high-strength fiber tape is adhered to the surface of one of the concrete skeletons which are crossed and joined together along the longitudinal direction of the concrete skeleton, and the other Since the end portion of the high-strength fiber tape is inserted into the insertion fixing hole formed in the concrete skeleton and the insertion fixing hole is filled with the adhesive and fixed, the following effects are obtained.
【００３５】(1) 薄くて細長い高強度繊維テープをコン
クリート躯体に貼着するため、空間的な制約を受けるこ
とがなく、軽量でハンドリング性が良く、作業能率・作
業安全性などの大幅な向上を図れる。さらに、薄くて細
長い高強度繊維テープを使用しているため、補強完成後
の構造物における断面変化が僅少であり、また死荷重の
増加が無視できるので構造系の変化を伴うことがない利
点もある。(1) Since a thin and long high-strength fiber tape is attached to a concrete skeleton, it is light in weight and easy to handle without being restricted in space, and its work efficiency and work safety are greatly improved. Can be achieved. Furthermore, since thin and long high-strength fiber tape is used, the cross-sectional change in the structure after completion of reinforcement is minimal, and the increase in dead load is negligible, which also has the advantage of not changing the structural system. is there.
【００３６】(2) 高強度繊維テープの端部を挿入固定孔
に挿入して接着剤により固着するため、柱〜梁や，受台
〜底版などの接合部のように定着区間を確保できない場
合に容易に適用できる。(2) When the end portion of the high-strength fiber tape is inserted into the insertion fixing hole and fixed by an adhesive, when a fixing section cannot be secured like a joint portion such as a pillar-beam or a pedestal-bottom plate. Can be easily applied to.
【００３７】(3) 高強度繊維テープであれば、薄く幅が
小さいため、相手側のコンクリート躯体の主筋を切断し
て打設する心配がなく、有効な補強をなし得る。また、
炭素繊維の優れた引張性能により、鉄筋の場合より打設
数量を低減でき、既設底版を傷める可能性も少なくな
る。(3) Since the high-strength fiber tape is thin and has a small width, it is possible to effectively reinforce without worrying about cutting and placing the main bar of the concrete skeleton on the other side. Also,
Due to the excellent tensile performance of carbon fiber, the number of castings can be reduced and the possibility of damaging the existing bottom slab is reduced compared to the case of reinforcing bars.
【００３８】(4) 高強度繊維テープの他端部を高強度繊
維シートで定着する場合には、高強度繊維テープが薄い
ため確実に巻き付けることができ、またフープ効果によ
り定着効果が大きくなり、定着長を低減することができ
る。(4) When fixing the other end of the high-strength fiber tape with the high-strength fiber sheet, the high-strength fiber tape is thin, so that it can be securely wound, and the hoop effect increases the fixing effect. The fixing length can be reduced.
【図１】この発明に係る補強構造の一実施例であり、
（ａ）は部分縦断面図、（ｂ）は平面図、（ｃ）は部分
拡大断面図である。FIG. 1 is an example of a reinforcing structure according to the present invention,
(A) is a partial longitudinal sectional view, (b) is a plan view, and (c) is a partially enlarged sectional view.
【図２】この発明に係る補強構造の他の実施例を示す概
略断面図である。FIG. 2 is a schematic sectional view showing another embodiment of the reinforcing structure according to the present invention.
【図３】従来の鉄筋コンクリート増打工法を装置基礎に
適用した例であり、（ａ）は側面図、（ｂ）は平面図で
ある。FIG. 3 is an example in which a conventional reinforced concrete hammering method is applied to a device foundation, (a) is a side view, and (b) is a plan view.
【図４】従来の鉄筋コンクリート増打工法を既設柱に適
用した場合の側面図である。FIG. 4 is a side view when a conventional reinforced concrete driving method is applied to an existing column.
【図５】（ａ）は従来の鋼板貼付工法を示す概略正面
図、（ｂ）は従来の炭素繊維シート貼付工法を示す概略
正面図である。FIG. 5A is a schematic front view showing a conventional steel plate pasting method, and FIG. 5B is a schematic front view showing a conventional carbon fiber sheet pasting method.
【図６】従来の炭素繊維シート貼付工法において定着区
間の短縮を図った補強構造の例を示し、（ａ）は断面
図、（ｂ）は正面図である。FIG. 6 shows an example of a reinforcing structure in which a fixing section is shortened in a conventional carbon fiber sheet sticking method, (a) is a sectional view, and (b) is a front view.
１…炭素繊維テープ ２…挿入固定孔 ３…エポキシ樹脂系接着剤 ４…炭素繊維シート Ａ…既設受台 Ｂ…既設底板 Ｃ…既設柱 Ｄ…既設梁 1 ... Carbon fiber tape 2 ... Insertion fixing hole 3 ... Epoxy resin adhesive 4 ... Carbon fiber sheet A ... Existing pedestal B ... Existing bottom plate C ... Existing column D ... Existing beam
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松本 良雄 神奈川県横浜市中区千鳥町８番地 日本石 油株式会社中央技術研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Matsumoto 8 Chidori-cho, Naka-ku, Yokohama-shi, Kanagawa Nihon Sekiyu Co., Ltd. Central Technology Research Institute
Claims (2)
躯体表面に高強度繊維複合補強材を貼着し、この高強度
繊維複合補強材とコンクリート躯体とを一体化させるこ
とにより補強する既設コンクリート構造物の補強構造に
おいて、 交差して接合されているコンクリート躯体の一方のコン
クリート躯体表面に、テープ状の高強度繊維複合補強材
をこのコンクリート躯体の長手方向に沿って貼着し、他
方のコンクリート躯体に穿設された挿入固定孔に前記テ
ープ状高強度繊維複合補強材の端部を挿入し、この挿入
固定孔に接着剤を充填することにより前記テープ状高強
度繊維複合補強材の端部を固着してなることを特徴とす
る既設コンクリート構造物の補強構造。1. Reinforcement of an existing concrete structure, which comprises reinforcing a high-strength fiber composite reinforcing material on the surface of a concrete structure of an existing concrete structure and integrating the high-strength fiber composite reinforcing material and the concrete structure. In the structure, a tape-shaped high-strength fiber composite reinforcing material is attached to the surface of one of the concrete frames that are joined by crossing along the longitudinal direction of this concrete frame, and the other concrete frame is drilled. The end portion of the tape-shaped high-strength fiber composite reinforcing material is inserted into the inserted fixing hole, and the end portion of the tape-shaped high-strength fiber composite reinforcing material is fixed by filling the insertion fixing hole with an adhesive. Reinforcement structure of existing concrete structure characterized by being.
物の補強構造において、テープ状高強度繊維複合補強材
の挿入固定孔と反対側の端部を、シート状高強度繊維複
合補強材によるフープ巻きで定着してなることを特徴と
する既設コンクリート構造物の補強構造。2. The reinforcing structure for an existing concrete structure according to claim 1, wherein an end portion of the tape-shaped high-strength fiber composite reinforcing material on the side opposite to the insertion fixing hole is formed by a sheet-shaped high-strength fiber composite reinforcing material. Reinforcement structure of existing concrete structure characterized by being fixed by winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6211209A JP2796501B2 (en) | 1994-09-05 | 1994-09-05 | Reinforcement structure for existing concrete structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6211209A JP2796501B2 (en) | 1994-09-05 | 1994-09-05 | Reinforcement structure for existing concrete structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08120948A true JPH08120948A (en) | 1996-05-14 |
| JP2796501B2 JP2796501B2 (en) | 1998-09-10 |
Family
ID=16602140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6211209A Expired - Fee Related JP2796501B2 (en) | 1994-09-05 | 1994-09-05 | Reinforcement structure for existing concrete structures |
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| Country | Link |
|---|---|
| JP (1) | JP2796501B2 (en) |
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|---|---|---|---|---|
| KR100408437B1 (en) * | 1997-09-16 | 2003-12-06 | 신닛뽄세이테쯔 카부시키카이샤 | Structure for reinforcing concrete member and reinforcing method |
| JP2006052633A (en) * | 2004-07-15 | 2006-02-23 | Mitsubishi Kagaku Sanshi Corp | Structure and its reinforcing member and method |
| JP2006057420A (en) * | 2004-08-24 | 2006-03-02 | Shimizu Corp | Reinforcing structure of masonry columnar body |
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1994
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100408437B1 (en) * | 1997-09-16 | 2003-12-06 | 신닛뽄세이테쯔 카부시키카이샤 | Structure for reinforcing concrete member and reinforcing method |
| KR100567343B1 (en) * | 2002-10-31 | 2006-04-04 | 주식회사 웅천텍스텍 | The method for manufacturing and composition of KIMCHI dressing materials and KIMCHI |
| JP2006052633A (en) * | 2004-07-15 | 2006-02-23 | Mitsubishi Kagaku Sanshi Corp | Structure and its reinforcing member and method |
| JP2006057420A (en) * | 2004-08-24 | 2006-03-02 | Shimizu Corp | Reinforcing structure of masonry columnar body |
| JP2011202459A (en) * | 2010-03-26 | 2011-10-13 | Sumitomo Mitsui Construction Co Ltd | Aseismatic reinforcing structure and method for rc deck slab |
| JP2013256788A (en) * | 2012-06-12 | 2013-12-26 | Toa Harbor Works Co Ltd | Structure body and lining method using fiber-reinforced cementitious composite with multiple fine cracks |
| JP2014051825A (en) * | 2012-09-07 | 2014-03-20 | Ohbayashi Corp | Aseismic reinforcement structure for reinforced concrete |
| JP2014051826A (en) * | 2012-09-07 | 2014-03-20 | Ohbayashi Corp | Aseismic reinforcement structure for reinforced concrete |
| JP2014206017A (en) * | 2013-04-15 | 2014-10-30 | ファイベックス株式会社 | Anchorage structure for tension member |
| CN112431430A (en) * | 2020-10-21 | 2021-03-02 | 北京工业大学 | Reinforcing protection device for beam-column joint and mounting method thereof |
| CN112431430B (en) * | 2020-10-21 | 2022-10-28 | 北京工业大学 | Reinforcing protection device for beam-column joint and mounting method thereof |
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|---|---|
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