JPH11324223A - Reinforcing/repairing fiber sheet - Google Patents
Reinforcing/repairing fiber sheetInfo
- Publication number
- JPH11324223A JPH11324223A JP14205898A JP14205898A JPH11324223A JP H11324223 A JPH11324223 A JP H11324223A JP 14205898 A JP14205898 A JP 14205898A JP 14205898 A JP14205898 A JP 14205898A JP H11324223 A JPH11324223 A JP H11324223A
- Authority
- JP
- Japan
- Prior art keywords
- fiber sheet
- fiber
- sheet
- strength fibers
- strength
- 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
Landscapes
- Rod-Shaped Construction Members (AREA)
- Reinforcement Elements For Buildings (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は,各種構造物の補強
・補修用に用いる繊維シートの改善に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a fiber sheet used for reinforcing and repairing various structures.
【0002】[0002]
【従来の技術】高強度繊維を樹脂で帯状のシート状やフ
イルム状に成形した繊維シートや繊維テープ,或いは高
強度繊維を線状に加工した繊維ケーブルが各種構造物の
補強補修用材料として使用されている。例えば,炭素繊
維やアラミド繊維のように高強度の繊維をエポキシ樹脂
中に一方向或いは二方向に配列して帯状のシートとした
ものは,橋脚や橋桁の補強材料として注目されており,
該繊維をケーブル状に加工したり樹脂中で線状に成形し
たものはPC緊張材,アンカー材,コンクリート補強材
等に適用されている。2. Description of the Related Art A fiber sheet or fiber tape obtained by molding a high-strength fiber into a belt-like sheet or film with a resin, or a fiber cable obtained by processing a high-strength fiber into a linear shape is used as a material for reinforcing and repairing various structures. Have been. For example, strips made of high-strength fibers, such as carbon fibers and aramid fibers, arranged in one or two directions in epoxy resin have attracted attention as reinforcing materials for bridge piers and bridge girders.
The fiber processed into a cable or formed into a line in a resin is used as a PC tendon, an anchor, a concrete reinforcing material, or the like.
【0003】このような繊維補強プラスチックス(FR
P)が建設分野でも使用され始めたが,実際の使用にあ
たっては,それぞれの特徴が構造物の強度向上に最も寄
与するように工夫されねばならない。[0003] Such fiber reinforced plastics (FR)
P) has begun to be used in the construction field, but in actual use, it must be devised so that each feature contributes most to improving the strength of the structure.
【0004】例えば前記の繊維シートまたは繊維テープ
(以下,略して繊維シートと呼ぶ)を橋脚基部の補強に
適用する場合の施工例について見ると,橋脚の円周方向
に繊維シートを巻付ける方法と,橋脚の軸方向(縦方
向)に繊維シートを平行に並べて張り付ける方法とがあ
る。前者は橋脚のせん断補強,後者はじん性補強がなさ
れる。いずれも,その施工にあたっては,コンクリート
表面を下地処理(整形やサンダー掛け)して又はせずし
て,通常は繊維シートの含浸樹脂例えばエポキシ樹脂と
同種類の樹脂を下塗りし,その上に該繊維シートを貼付
け,次いで同じ樹脂を上塗りするという施工手順で行わ
れる。これが終われば,その上に保護モルタル仕上げが
通常行われる。For example, in the case of applying the above-mentioned fiber sheet or fiber tape (hereinafter simply referred to as fiber sheet) to reinforcement of a pier base, a method of winding a fiber sheet in a circumferential direction of a pier, There is a method in which fiber sheets are arranged in parallel in the axial direction (longitudinal direction) of the pier and attached. In the former, shear reinforcement of the pier is provided, and in the latter, toughness reinforcement. In either case, the concrete surface is treated with or without a foundation treatment (shaping or sanding), and is usually subbed with a resin impregnated with a fiber sheet, for example, the same resin as epoxy resin. This is done by applying a fiber sheet and then overcoating with the same resin. When this is done, a protective mortar finish is usually performed on it.
【0005】前者のせん断補強の場合には,連続長さの
繊維シートを螺旋状にぐるぐる巻きして巻き上げ(また
は巻き下げ)することにより,必要面積を覆いつくすこ
とができる。すなわち,繊維シートは連続しているの
で,その始端も終端もその係止に特別な工夫はいらな
い。ところが,後者のじん性補強の場合には,一定の長
さに切断した繊維シートのそれぞれを橋脚の場合は縦方
向に(桁の場合には横方向に)並貼して必要面積を覆う
ので,各繊維シートの端部は自由端となる。この自由端
のままでは,その部分におけるじん性補強に寄与する程
度が低くなるので,この端部の係止に特別な工夫が必要
となる。[0005] In the former case of shear reinforcement, the required area can be covered by spirally winding and winding (or unwinding) a continuous-length fiber sheet. That is, since the fibrous sheet is continuous, no special measures are required for its locking at the beginning and end. However, in the latter case of toughening, the fiber sheets cut to a certain length are attached side by side in the vertical direction (in the case of girders) in the case of a bridge pier to cover the required area. The end of each fiber sheet is a free end. If this free end remains, the degree of contribution to toughness reinforcement at that portion will be low, so a special device is required to lock this end.
【0006】水平表面をもつ基礎の上に橋脚が立ち上が
っている場合に,一定長さの繊維シートを橋脚表面に垂
直方向に並貼する場合の下端の係止を例とすると,次の
ような4種の方法が提案された。When a pier stands on a foundation having a horizontal surface and the fiber sheet of a fixed length is vertically stuck to the pier surface in a vertical direction, for example, the lower end is locked as follows. Four methods have been proposed.
【0007】(1) 鉄板接着方式:繊維シートの下端を基
礎表面より若干上方に揃えて貼り,下方にL部またはフ
ランジ部をもつ鉄板で繊維シートの下端部を押えると共
に,基礎表面に載せたL部またはフランジ部に対してア
ンカーボルトを基礎中に垂直方向に打ち込んで該鉄板を
固定する。これにより,基礎部と橋脚部との間のせん断
補強およびじん性補強がなされる。(1) Iron plate bonding method: The lower end of the fiber sheet is adhered with the lower end of the fiber sheet aligned slightly above the base surface, and the lower end of the fiber sheet is pressed down with an iron plate having an L portion or a flange below, and placed on the base surface. An anchor bolt is driven into the foundation vertically to the L portion or the flange portion to fix the iron plate. As a result, shear reinforcement and toughness reinforcement between the foundation and the pier are provided.
【0008】(2) 鉄板接着およびアンカーボルト定着方
式:前記(1) の鉄板接着方式を行うと共に,繊維シート
の下端部を押さえている部分の鉄板に対して,アンカー
ボルトを橋脚中に水平方向に打ち込む。この橋脚中に打
ち込むアンカーボルトの数を増やすことにより,繊維シ
ートと鉄板との接合が強くなるので,基礎部と橋脚部と
の間のせん断補強およびじん性補強が一層良好となる。(2) Iron plate bonding and anchor bolt fixing method: The iron plate bonding method described in (1) above is performed, and the anchor bolts are horizontally inserted into the piers with respect to the iron plate at the lower end of the fiber sheet. Type in. By increasing the number of anchor bolts to be driven into the pier, the bonding between the fiber sheet and the iron plate is strengthened, so that the shear reinforcement and toughness reinforcement between the foundation and the pier are further improved.
【0009】(3) 鉄板・アンカーボルト定着方式:繊維
シートの下端を橋脚の最下端よりもはみ出させ,そのは
み出し部分を90°方向を変えて基礎表面に貼付ける。
そして,基礎表面に貼付けた繊維シートの端部に鉄板を
載せ,この鉄板の上らかアンカーボルトを基礎中に打ち
込む。そのさい,繊維シートが橋脚から基礎表面に方向
を変える部分でアールが発生して,このアール部分の裏
側で空洞が生ずるのを防止するために,予め橋脚根付け
部分にモルタルでアールに相当する盛り付けを行ってお
く。これにより,アール部分の裏側の空洞にモルタルが
充填されたことと同じことになる。この方法の良いとこ
ろは,基礎と橋脚の間を連続した繊維シートで連結でき
ることである。(3) Iron plate / anchor bolt fixing method: The lower end of the fiber sheet is protruded from the lowermost end of the pier, and the protruding portion is attached to the foundation surface by changing the direction by 90 °.
An iron plate is placed on the end of the fiber sheet attached to the surface of the foundation, and an anchor bolt is driven into the foundation from above the iron plate. In this case, in order to prevent the fiber sheet from changing its direction from the pier to the foundation surface to form a radius, and to prevent a cavity from being formed behind the radius, a mortar should be applied to the pier rooting portion in advance by mortar. Keep going. This is the same as filling the mortar in the cavity on the back side of the radius portion. The advantage of this method is that it can be connected with a continuous fiber sheet between the foundation and the pier.
【0010】(4) 根巻きコンクリート中の鉄板・アンカ
ーボルト定着方式:繊維シートの下端を橋脚の最低部に
揃え,その上を鉄板巻きし,鉄板の上らかアンカーボル
トを橋脚中に打ち込んで鉄板で繊維シートの下端部を押
さえる。そして,橋脚を囲うように基礎上に型枠を組
み,コンクリートを打設して根巻きコンクリートを形成
する。これにより根巻きコンクリート中で繊維シートの
下端が鉄板とアンカーボルトで定着され,根巻きコンク
リートも強度補強に寄与することになる。(4) Anchoring method for iron plate and anchor bolt in root-wound concrete: Align the lower end of the fiber sheet with the lowest part of the pier, wrap the iron plate over it, and drive the anchor bolt on the iron plate into the pier. Press the lower end of the fiber sheet with an iron plate. Then, formwork is built on the foundation so as to surround the pier, and concrete is cast to form a rooted concrete. As a result, the lower end of the fiber sheet is fixed by the iron plate and the anchor bolts in the wrapped concrete, and the wrapped concrete also contributes to the strength reinforcement.
【0011】他方,橋桁のじん性補強のために橋桁裏面
にその軸方向に繊維シートを貼付ける場合には,所定の
長さに切断した多数枚の繊維シートを各端部を揃えて並
行に貼着することが行われるが,この場合には,各繊維
シートの端部を係止するのが困難なところでは,貼着ま
まとするか,或いは該端部を覆うように別の繊維シート
を直交する方向にクロスして重ね貼りする方法などが採
られている。いずれにしても,この場合には,繊維シー
トとコンクリート面との接着強度が十分でなければなら
ない。On the other hand, when a fiber sheet is stuck on the back side of the bridge girder in the axial direction to reinforce the toughness of the bridge girder, a large number of fiber sheets cut to a predetermined length are aligned in parallel at respective ends. Attachment is performed. In this case, where it is difficult to lock the end of each fiber sheet, the fiber sheet is left attached or another fiber sheet is covered so as to cover the end. Are crossed in a direction orthogonal to each other, and a method of overlapping and pasting is adopted. In any case, in this case, the adhesive strength between the fiber sheet and the concrete surface must be sufficient.
【0012】[0012]
【発明が解決しようとする課題】前記のように,構造物
の軸方向に繊維シートを貼着して構造物のじん性補強を
行う場合には,繊維シートの両端はそこで途切れた自由
端となり,この繊維シートの途切れた部分で補強がなさ
れず,このままでは,かえって,該自由端部分に応力集
中が発生する危険もある。このため,前記の(1) 〜(4)
のような定着方式が工夫されているが,いずれも鉄板や
アンカーボルトを使用するものであり,このため,作業
が煩雑になると共に,せっかくの繊維シートの特徴が生
かし切れないという問題がある。本発明はこのような問
題の解決を図ることを課題としたものである。As described above, when a fibrous sheet is adhered in the axial direction of a structure to reinforce the toughness of the structure, both ends of the fibrous sheet become free ends interrupted there. However, no reinforcement is made at the discontinuous portion of the fiber sheet, and there is a risk that stress concentration may occur at the free end portion. For this reason, the above (1) to (4)
Although such fixing methods have been devised, both use an iron plate and anchor bolts, and therefore, there is a problem that the operation becomes complicated and the characteristics of the fiber sheet cannot be fully utilized. An object of the present invention is to solve such a problem.
【0013】[0013]
【課題を解決するための手段】前記の課題を解決する繊
維シート材料として,本発明によれば,樹脂中に高強度
繊維を長手方向に配向してなる帯状の繊維シートの端部
に,そのシート端からのび出た該長手方向の高強度繊維
を束ねて形成した複数本のロッド部を設けてなる補強・
補修用繊維シートを提供する。According to the present invention, as a fiber sheet material which solves the above-mentioned problems, according to the present invention, a high-strength fiber is longitudinally oriented in a resin at an end of a strip-shaped fiber sheet. Reinforcement by providing a plurality of rods formed by bundling the high-strength fibers in the longitudinal direction extending from the end of the sheet
A repair fiber sheet is provided.
【0014】また,本発明によれば,樹脂中に高強度繊
維を長手方向に配向してなる帯状の繊維シート部と,こ
の繊維シートの少なくとも一方の端部から所定の長さだ
け前記シート中の高強度繊維が収斂しつつのび出す遷移
部と,この遷移部の端部から所定の長さだけ該高強度繊
維を束ねて必要本数のロッドに加工してなるロッド部
と,からなる補強・補修用繊維シートを提供する。Further, according to the present invention, a strip-shaped fiber sheet portion in which high-strength fibers are oriented in a resin in a longitudinal direction, and a predetermined length from at least one end of the fiber sheet in the sheet. And a rod portion formed by bundling the high-strength fibers by a predetermined length from the end of the transition portion and processing the rod into a required number of rods. A repair fiber sheet is provided.
【0015】[0015]
【発明の実施の形態】本発明の繊維シートは端部をロッ
ド化したものであり,シート部もロッド部も連続した高
強度繊維で繋がっている点に特徴があり,このロッド部
を設けたことにより,繊維シートの端部を通常のケーブ
ル端の定着方式と同様にして構造体に定着させることが
できる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The fiber sheet of the present invention has a rod end, and is characterized in that both the sheet part and the rod part are connected by continuous high-strength fibers. This makes it possible to fix the end of the fiber sheet to the structure in the same manner as in a normal cable end fixing method.
【0016】本発明繊維シートの代表的な実施の形態を
図1に示した。図1に見られるように,この繊維シート
は,樹脂中に高強度繊維を長手方向に配向してなる帯状
の繊維シート1の端に,該シート1からのび出た繊維を
束ねたロッド部2を複数本形成したものである。FIG. 1 shows a typical embodiment of the fiber sheet of the present invention. As shown in FIG. 1, this fiber sheet is composed of a rod-shaped part 2 in which fibers extending from the sheet 1 are bundled at the end of a strip-shaped fiber sheet 1 in which high-strength fibers are oriented in a longitudinal direction in a resin. Are formed in a plurality.
【0017】繊維シート1は,従来のものと同様に,高
強度繊維例えばアラミド繊維(ポリ−P−フエニレンテ
レフタルアミドからなる繊維),炭素繊維,ガラス繊維
等を長手方向に配向して結合剤樹脂例えばエポキシ樹脂
やビニルエステル系の樹脂で固めたものである。長手方
向とは直交する方向に同様の高強度繊維を有する二方向
性の繊維シートであってもかまわない。この繊維シート
1の厚さや幅も,従来品と同様に各種のものであること
ができ,補強・補修する箇所に応じて適切な寸法形状の
ものを選べばよい。また,以下において便宜上,高強度
繊維としてアラミド繊維,結合剤樹脂としてエポシキ樹
脂を用いた繊維シートを例として説明するが,高強度繊
維や結合剤樹脂の種類はこれに限られるものではない。The fiber sheet 1 is made of high-strength fibers such as aramid fibers (fibers made of poly-P-phenylene terephthalamide), carbon fibers, glass fibers, etc., in the longitudinal direction, similar to the conventional ones. It is made of a resin such as an epoxy resin or a vinyl ester resin. A bidirectional fiber sheet having similar high-strength fibers in a direction orthogonal to the longitudinal direction may be used. The thickness and width of the fiber sheet 1 can be various as in the case of the conventional product, and an appropriate size and shape may be selected according to the location to be reinforced and repaired. For convenience, a fiber sheet using aramid fiber as the high-strength fiber and an epoxy resin as the binder resin will be described below as an example, but the types of the high-strength fiber and the binder resin are not limited thereto.
【0018】繊維シート1内の長手方向に配向している
各アラミド繊維をシート中のエポキシ樹脂からシート端
でのび出させ,図1の例では,それらを束ねて3本のロ
ッド2に加工してある。各ロッド2はシートと同じエポ
キシ樹脂で固めてある。より具体的には,三つ群に分け
たアラミド繊維をさらに必要な束に分け,各束をより線
(ストランド)にした状態でエポキシ樹脂で固定するこ
とにより,一本のロッド部2が形成されている。Each aramid fiber oriented in the longitudinal direction in the fiber sheet 1 is extended from the epoxy resin in the sheet at the end of the sheet, and in the example of FIG. It is. Each rod 2 is hardened with the same epoxy resin as the sheet. More specifically, the aramid fibers divided into three groups are further divided into necessary bundles, and each bundle is formed into a strand (strand) and fixed with epoxy resin to form one rod portion 2. Have been.
【0019】繊維シート1とロッド部2との間には,シ
ート端からロッド部2に向かうにつれて繊維束が収斂す
る中間体が存在するが,このシート形状からロッド形状
に形状が変化する部分を遷移部と名付けることにする。
この遷移部3も,エポキシ樹脂で固めるが,場合によっ
てはアラミド繊維が露出したままとして,この部分を軟
質な帯域としてもよい。いずれにしても,ロッド部2を
軸方向に引張応力を加えた場合に,遷移部3とロッド部
2との境界でアラミド繊維がばらけないように該境界部
で急激な勾配変化を持たないようにすると共に,ロッド
部2ではストランドとするか組紐状として樹脂で固める
のがよい。必要に応じて,該境界部に輪留めを嵌めても
よい。There is an intermediate between the fiber sheet 1 and the rod portion 2 where the fiber bundle converges from the sheet end toward the rod portion 2. It will be named transition part.
The transition portion 3 is also hardened with an epoxy resin, but in some cases, the aramid fiber may be left exposed, and this portion may be a soft band. In any case, when a tensile stress is applied to the rod portion 2 in the axial direction, there is no sharp gradient change at the boundary between the transition portion 3 and the rod portion 2 so that the aramid fiber does not disperse at the boundary. At the same time, it is preferable that the rod portion 2 is made of a strand or a braid and solidified with resin. If necessary, a buckle may be fitted to the boundary.
【0020】このようにして本発明の繊維シートは,樹
脂中に高強度繊維を長手方向に配向してなる帯状の繊維
シート部1と,この繊維シート1の少なくとも一方の端
部から所定の長さだけ前記シート中の高強度繊維が収斂
しつつのび出す遷移部3と,この遷移部3の端部から所
定の長さだけ該高強度繊維を束ねて必要本数のロッドに
加工してなるロッド部2とを有する。As described above, the fiber sheet of the present invention comprises a band-shaped fiber sheet portion 1 in which high-strength fibers are oriented in a resin in a longitudinal direction, and a predetermined length from at least one end of the fiber sheet 1. A transition section 3 from which the high-strength fibers in the sheet converge and extend, and a rod formed by bundling the high-strength fibers by a predetermined length from the end of the transition section 3 and processing the required number of rods. Part 2.
【0021】この繊維シートは,従来の繊維シートと同
様に,繊維シート部1を構造体に接合樹脂例えばエポキ
シ樹脂を用いて貼着することにより,構造体の補修・補
強用に供するが,シート端にロッド部2を有するので,
特に構造体の軸方向に貼着してじん性補強を行う場合の
端部定着を簡易且つ確実に行うことができる。例えば橋
脚の表面に本発明の繊維シートを縦方向に並貼する場合
の下端の定着については,図2のようにして行うことが
できる。This fiber sheet is used for repair / reinforcement of the structure by attaching the fiber sheet portion 1 to the structure using a bonding resin, for example, an epoxy resin, similarly to the conventional fiber sheet. Since it has a rod part 2 at the end,
In particular, end fixing in the case where toughening is performed by sticking in the axial direction of the structure can be easily and reliably performed. For example, the fixing of the lower end when the fiber sheets of the present invention are stuck on the surface of the pier in the vertical direction can be performed as shown in FIG.
【0022】図2(a)は,橋脚4が基礎5に立ち上が
っている場合の橋脚半身略断面を,また図2(b)はそ
の半身略側面を示すものであるが,その橋脚表面に本発
明の繊維シートの繊維シート部1を縦方向に並貼し,各
下端のロッド部2を基礎5内に埋設し,遷移部3に対し
ては,その上に別の繊維シート6を水平方向に巻き付け
たものである。FIG. 2 (a) shows a schematic cross section of a pier half when the pier 4 stands on the foundation 5, and FIG. 2 (b) shows a schematic side view of the pier. The fiber sheet portions 1 of the fiber sheet of the invention are stuck in a vertical direction, the rod portions 2 at each lower end are buried in a foundation 5, and another fiber sheet 6 is placed on the transition portion 3 in a horizontal direction. It is wrapped around.
【0023】すなわち,従来と同様に,繊維シートの含
浸樹脂例えばエポキシ樹脂と同種類の樹脂を下塗りし,
その上に繊維シート部1を縦方向に隙間なく貼付けるの
であるが,ロッド部2は,予め基礎5に穿孔したボルト
孔に挿入し,ロックボルト工法等と同様に定着剤(通常
はセメントペーストまたはモルタル)で該ボルト孔内で
固定する。そして,繊維シート部1とロッド部2との間
の遷移部3に対して繊維シート(またはテープ)6を橋
脚円周方向に巻付ける。そのあと,必要に応じて繊維シ
ートの全表面に同じエポキシ樹脂を上塗りし,さらにモ
ルタル仕上げを行うことによって施工が完了する。That is, as in the prior art, the same impregnating resin as the fiber sheet, for example, the same kind of resin as the epoxy resin, is used for undercoating.
The fiber sheet part 1 is stuck on it without any gap in the vertical direction. The rod part 2 is inserted into a bolt hole previously drilled in the foundation 5, and a fixing agent (usually cement paste) is inserted in the same manner as in the rock bolt method. Or mortar) is fixed in the bolt hole. Then, a fiber sheet (or tape) 6 is wound around the transition portion 3 between the fiber sheet portion 1 and the rod portion 2 in the circumferential direction of the pier. Then, if necessary, the same epoxy resin is overcoated on the entire surface of the fiber sheet, and the mortar finish is applied to complete the construction.
【0024】各繊維シートの上端については,ロッド部
2を設けないで,従来と同様に橋脚最上端で各シートの
端面を揃え,その上から,必要幅だけ橋脚円周方向に繊
維シートまたはテープを巻付けるという方法で対処する
こともできるが,場合によっては,ロッド部2を設け
て,前記の基礎への定着法と同じ方法を,上部構造体に
対して行うこともできる。また,上部構造体から,各ロ
ッド部2を定着させるための固定具(例えば橋脚円周方
向に巻付けた鉄板)を支持させ,この固定具にロッド部
2の端部を,公知のケーブル端の定着具と同じものを用
いて,接合するという方法を採用することもできる。At the upper end of each fiber sheet, the rod sections 2 are not provided, and the end faces of the sheets are aligned at the uppermost end of the pier as in the prior art. However, in some cases, the same method as the above-described method of fixing to the foundation can be applied to the upper structure by providing the rod portion 2. In addition, a fixing device (for example, an iron plate wound in the circumferential direction of the pier) for fixing each rod portion 2 is supported from the upper structure, and the end portion of the rod portion 2 is connected to a known cable end. It is also possible to adopt a method of joining using the same fixing device as the above.
【0025】図3は,橋桁のじん性補強のために本発明
の繊維シートを橋桁7の裏面に桁の軸方向に並貼した例
を示すもので,繊維シート部1を桁全長にわたって図2
の場合と同様に並貼し,ロッド部2を,予め桁支持構造
体8(橋脚)に穿孔したボルト孔に挿入し,定着剤を用
いて該ボルト孔内で固定したものである。そして,遷移
部3に対しては,繊維シートとは直交する方向に他の繊
維シート9(またはテープ)を貼付ける。図3には見え
ないが,繊維シート部1の他方の端部も,図示と同様に
他方の桁支持構造体にロッド部2を固定し,遷移部3に
対しては同様に他の繊維シートまたはテープを直交する
方向に貼付ける。そのあと,必要に応じて繊維シートの
全表面に同じエポキシ樹脂を上塗りし,さらにモルタル
仕上げを行うことによって施工が完了する。FIG. 3 shows an example in which the fiber sheet of the present invention is stuck on the back surface of the bridge girder 7 in the axial direction of the girder to reinforce the toughness of the bridge girder.
The rod portions 2 are inserted into bolt holes previously drilled in the girder support structure 8 (pier), and fixed in the bolt holes using a fixing agent. Then, another fiber sheet 9 (or tape) is attached to the transition portion 3 in a direction orthogonal to the fiber sheet. Although not visible in FIG. 3, the other end of the fiber sheet portion 1 is also fixed with the rod portion 2 to the other girder support structure in the same manner as shown, and the other fiber sheet portion is similarly fixed to the transition portion 3. Or attach the tape in a direction perpendicular to it. Then, if necessary, the same epoxy resin is overcoated on the entire surface of the fiber sheet, and the mortar finish is applied to complete the construction.
【0026】以上の例に限らす,一般建造物の柱,梁,
スラブ,壁等に対しても,本発明の繊維シートはロッド
部2を構造体に定着させることができる。The columns and beams of general buildings are not limited to the above examples.
The fiber sheet of the present invention can fix the rod portion 2 to the structure also for slabs, walls, and the like.
【0027】[0027]
【発明の効果】以上説明したように,本発明の繊維シー
トは,ロッド部でその端部を構造体に定着させることが
できるので,シート端部でも軸方向の引張応力や曲げ応
力に対しての補強が十分になされるという優れた効果を
奏する。また,ロッド端の定着はケーブル端の定着と同
様に施工が容易であるから,施工性も良好であり,各種
構造物の補強・補修用繊維シートとして従来のものには
ない実用的な効果を奏する。As described above, since the end of the fiber sheet of the present invention can be fixed to the structure by the rod portion, the fiber sheet of the present invention is not affected by the tensile stress or bending stress in the axial direction even at the end of the sheet. This has an excellent effect that the reinforcement is sufficiently performed. In addition, the anchoring at the rod end is as easy as the anchoring at the cable end, so the workability is good, and the fiber sheet for reinforcing and repairing various structures has a practical effect not found in the past. Play.
【図1】本発明の繊維シートの端部構造の例を示す斜視
図である。FIG. 1 is a perspective view showing an example of an end structure of a fiber sheet of the present invention.
【図2】本発明に従う繊維シートを用いて橋脚のじん性
補強を行う例を示す橋脚下部の状態を示す図であり,図
2(a)はその橋脚半身略断面図,図2(b)はその橋
脚半身側面図である。FIG. 2 is a diagram showing a state of a lower part of a pier showing an example of toughening a pier using a fiber sheet according to the present invention, and FIG. 2 (a) is a schematic sectional view of the pier half body, FIG. Is a side view of the pier half body.
【図3】本発明に従う繊維シートを用いて橋桁のじん性
補強を行う例を示す部分断面図である。FIG. 3 is a partial cross-sectional view showing an example of toughening a bridge girder using a fiber sheet according to the present invention.
1 繊維シート部 2 ロッド部 3 遷移部 4 橋脚 5 基礎 6 遷移部の上に貼付けた他の繊維シート 7 橋桁 8 橋桁支持構造体 9 遷移部の上に貼付けた他の繊維シート DESCRIPTION OF SYMBOLS 1 Fiber sheet part 2 Rod part 3 Transition part 4 Bridge pier 5 Foundation 6 Other fiber sheet stuck on transition part 7 Bridge girder 8 Bridge girder support structure 9 Other fiber sheet stuck on transition part
Claims (5)
てなる帯状の繊維シートの端部に,そのシート端からの
び出た該長手方向の高強度繊維を束ねて形成した複数本
のロッド部を設けてなる補強・補修用繊維シート。1. A plurality of long-strength fibers formed by bundling the longitudinal high-strength fibers protruding from the end of the sheet at the end of a strip-shaped fiber sheet in which high-strength fibers are oriented in a longitudinal direction in a resin. A fiber sheet for reinforcement and repair with a rod.
てなる帯状の繊維シート部と,この繊維シートの少なく
とも一方の端部から所定の長さだけ前記シート中の高強
度繊維が収斂しつつのび出す遷移部と,この遷移部の端
部から所定の長さだけ該高強度繊維を束ねて必要本数の
ロッドに加工してなるロッド部と,からなる補強・補修
用繊維シート。2. A band-like fiber sheet portion in which high-strength fibers are oriented in a resin in a longitudinal direction, and the high-strength fibers in the sheet converge by a predetermined length from at least one end of the fiber sheet. A reinforcing and repairing fiber sheet comprising: a transition portion extending and extending; and a rod portion formed by bundling the high-strength fibers by a predetermined length from an end portion of the transition portion and processing into a required number of rods.
またはガラス繊維である請求項1または2に記載のロッ
ド部をもつ補強・補修用繊維シート。3. The reinforcing / repairing fiber sheet having a rod portion according to claim 1, wherein the high-strength fiber is an aramid fiber, a carbon fiber, or a glass fiber.
て,これと直交する方向に配向した高強度繊維をシート
中に含有する請求項1,2または3に記載の補強・補修
用繊維シート。4. The reinforcing / repairing fiber sheet according to claim 1, wherein the sheet contains, in addition to the high-strength fiber oriented in the longitudinal direction, high-strength fiber oriented in a direction perpendicular to the longitudinal direction. .
または組紐状にして樹脂で固定化してなる請求項1,
2,3または4に記載の補強・補修用繊維シート。5. The rod portion is formed by forming a bundle of high-strength fibers into a more linear or braided shape and fixing the bundle with a resin.
5. The fiber sheet for reinforcement and repair according to 2, 3, or 4.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14205898A JP3350447B2 (en) | 1998-05-11 | 1998-05-11 | Fiber sheet for reinforcement and repair |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14205898A JP3350447B2 (en) | 1998-05-11 | 1998-05-11 | Fiber sheet for reinforcement and repair |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11324223A true JPH11324223A (en) | 1999-11-26 |
JP3350447B2 JP3350447B2 (en) | 2002-11-25 |
Family
ID=15306447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14205898A Expired - Lifetime JP3350447B2 (en) | 1998-05-11 | 1998-05-11 | Fiber sheet for reinforcement and repair |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3350447B2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002129753A (en) * | 2000-10-25 | 2002-05-09 | Nippon Ps:Kk | Reinforcing method for concrete structure |
JP2002285461A (en) * | 2001-03-26 | 2002-10-03 | Chishin Go | Fiber-reinforced sheet and method for reinforcement of structure |
JP2007009482A (en) * | 2005-06-29 | 2007-01-18 | Nittetsu Corrosion Prevention Co Ltd | Reinforcing structure and reinforcing method of concrete structure |
JP2007308894A (en) * | 2006-05-16 | 2007-11-29 | Abe Nikko Kogyo:Kk | Structure for reinforcing structure |
JP2010196270A (en) * | 2009-02-23 | 2010-09-09 | Taisei Corp | Structure for reinforcing existing building |
JP2010203153A (en) * | 2009-03-04 | 2010-09-16 | Kawasaki Heavy Ind Ltd | Fiber sheet for fiber reinforced resin having stress-relaxing area |
JP2013189798A (en) * | 2012-03-13 | 2013-09-26 | Jfe Steel Corp | Reinforcing method and reinforcing structure of steel structure |
JP5974157B1 (en) * | 2015-12-02 | 2016-08-23 | 株式会社ブルーム | Reinforced structure of reinforced concrete structure |
-
1998
- 1998-05-11 JP JP14205898A patent/JP3350447B2/en not_active Expired - Lifetime
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002129753A (en) * | 2000-10-25 | 2002-05-09 | Nippon Ps:Kk | Reinforcing method for concrete structure |
JP2002285461A (en) * | 2001-03-26 | 2002-10-03 | Chishin Go | Fiber-reinforced sheet and method for reinforcement of structure |
JP4644874B2 (en) * | 2001-03-26 | 2011-03-09 | 智深 呉 | Reinforcing fiber sheet and method for reinforcing structure |
JP2007009482A (en) * | 2005-06-29 | 2007-01-18 | Nittetsu Corrosion Prevention Co Ltd | Reinforcing structure and reinforcing method of concrete structure |
JP4608376B2 (en) * | 2005-06-29 | 2011-01-12 | 日鉄防蝕株式会社 | Reinforcing structure and reinforcing method for concrete structure |
JP2007308894A (en) * | 2006-05-16 | 2007-11-29 | Abe Nikko Kogyo:Kk | Structure for reinforcing structure |
JP2010196270A (en) * | 2009-02-23 | 2010-09-09 | Taisei Corp | Structure for reinforcing existing building |
JP2010203153A (en) * | 2009-03-04 | 2010-09-16 | Kawasaki Heavy Ind Ltd | Fiber sheet for fiber reinforced resin having stress-relaxing area |
JP2013189798A (en) * | 2012-03-13 | 2013-09-26 | Jfe Steel Corp | Reinforcing method and reinforcing structure of steel structure |
JP5974157B1 (en) * | 2015-12-02 | 2016-08-23 | 株式会社ブルーム | Reinforced structure of reinforced concrete structure |
Also Published As
Publication number | Publication date |
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JP3350447B2 (en) | 2002-11-25 |
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