JP2004036219A - Reinforcing material - Google Patents

Reinforcing material Download PDF

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Publication number
JP2004036219A
JP2004036219A JP2002194706A JP2002194706A JP2004036219A JP 2004036219 A JP2004036219 A JP 2004036219A JP 2002194706 A JP2002194706 A JP 2002194706A JP 2002194706 A JP2002194706 A JP 2002194706A JP 2004036219 A JP2004036219 A JP 2004036219A
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JP
Japan
Prior art keywords
reinforcing
piece
adhesive
fixing
long fiber
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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
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JP2002194706A
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Japanese (ja)
Inventor
Toshiaki Ota
太田 俊昭
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.)
Kyushu TLO Co Ltd
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Kyushu TLO Co Ltd
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Publication date
Application filed by Kyushu TLO Co Ltd filed Critical Kyushu TLO Co Ltd
Priority to JP2002194706A priority Critical patent/JP2004036219A/en
Publication of JP2004036219A publication Critical patent/JP2004036219A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing material which can reinforce a structure by being mounted in a place, requiring reinforcement, of the structure made of wood, steel or concrete, in place of prestressing steel. <P>SOLUTION: An anchoring/coupling body T, which is provided with a locking pin 31 for locking a looped anchor piece 2, is provided in a continuous-fiber-reinforced plastic reinforcing body A which is equipped with a reinforcing-body main piece 1 elongated in one direction, and the anchor piece 2 integrally molded at the end of the piece 1. An adhesive 4 is wholly or partially applied to a continuous-fiber bundle 3; before the curing of the adhesive 4, a fixed tensile force is exerted on the bundle 3 along the direction of the elongation of the bundle 3; and after the curing of the adhesive 4, the fixed tensile force is released so that the pieces 1 and 2 can be integrally molded. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、補強材に関する。
【0002】
【従来の技術】
従来、PC鋼材を定着体を介して定着させる定着工法が開発されており、PC鋼材としては、例えば、PC鋼7本より線(JISG−3536)をさらに数本より合わせた多層PC鋼より線を用い、定着体は、PC鋼材の端部にスリーブ(いわゆる、マンション)を冷間加工によって一体化させ、同スリーブの外周面にネジ切りを行なって雄ネジ部を形成し、同雄ネジ部に雌ネジ体を螺着して定着するようにしている。
【0003】
【発明が解決しようとする課題】
ところが、上記したPC鋼材は、重量が大きいことから施工性に難があり、また、定着体を設ける際には、スリーブをPC鋼材の端部に冷間加工により一体化させなければならず、手間を要するという不具合がある。そのため、軽量で施工性が良く、しかも、定着が容易に行なえるPC鋼材の代替品の開発が望まれていた。
【0004】
【課題を解決するための手段】
そこで、本発明では、一方向に伸延する補強体本片と、同補強体本片の端部に一体成形したループ状のアンカー片とを具備する長繊維強化プラスチック補強体に、上記アンカー片を係止する係止ピンを設けた定着・連結体を装備し、補強体本片とアンカー片は、長繊維束に接着剤を全体的若しくは部分的に塗布し、同接着剤が硬化する前に長繊維束にその伸延方向に沿って一定の張力を加え、同接着剤が硬化した後に一定の張力を解放して一体成形したことを特徴とする補強材を提供するものである。
【0005】
また、本発明では、定着・連結体は、少なくともアンカー片を被覆・保護することができるように形成したことにも特徴を有する。
【0006】
【発明の実施の形態】
以下に、本発明の実施の形態について説明する。
【0007】
すなわち、本発明に係る補強材は、一方向に伸延する補強体本片と、同補強体本片の端部に一体成形したループ状のアンカー片とを具備する長繊維強化プラスチック補強体に、上記アンカー片を係止する係止ピンを設けた定着・連結体を装備し、補強体本片とアンカー片は、長繊維束に接着剤を全体的若しくは部分的に塗布し、同接着剤が硬化する前に長繊維束にその伸延方向に沿って一定の張力を加え、同接着剤が硬化した後に一定の張力を解放して一体成形している。
【0008】
そして、定着・連結体は、少なくともアンカー片を被覆・保護することができるように形成している。
【0009】
【実施例】
以下に、本発明の実施例を、図面を参照しながら説明する。
【0010】
〔第1実施例〕
図1及び図2に示すHは、本発明に係る第1実施例としての補強材であり、同補強材Hは、長繊維強化プラスチック補強体(以下「補強体」と略称する。)Aと定着・連結体Tとから構成している。
【0011】
(補強体の説明)
補強体Aは、図3及び図6に示すように、1次元的にプレストレスPを導入した被拘束体K1と、同被拘束体K1の外周面を被覆して、同被拘束体K1がその伸延方向と直交する方向に膨張する歪みを拘束する第1拘束体K2と、同第1拘束体K2の外周面に螺旋状に巻回して、上記被拘束体K1がその伸延方向と直交する方向に膨張する歪みを拘束する第2拘束体K3とを具備して、2次元的にプレストレスを導入してなるものである。
【0012】
そして、被拘束体K1は、図3に示すように、一方向に伸延する補強体本片1と、同補強体本片1の両端部に一体成形したアンカー片2,2とを具備しており、各アンカー片2はループ状に形成している。
【0013】
しかも、被拘束体K1は、図3〜図7に示すように、長繊維束3に接着剤4を全体的に塗布し、同接着剤4が硬化する前に長繊維束3(例えば、長繊維3aの束12,000本(12K))にその伸延方向に沿って一定の張力F(例えば、5kg)を加え、同接着剤4が硬化した後に一定の張力Fを解放して、硬化した接着剤4に長繊維束3の伸延方向に沿ったプレストレスPを導入してなるものである。
【0014】
すなわち、長繊維束3は、図3(a)に示すように、例えば、長繊維3aの束12,000本(12K)を、さらに120本集めて束ねたものを使用することができ、図3(b)に示すように、ボビン5に巻回されている長繊維束3を引き出すと共に、途中で液体状の接着剤4中に浸漬させてa方向に引き出すことにより、同長繊維束3に接着剤4を塗布する。6は接着剤槽、7は引き出しガイドローラ、8は浸漬ガイドローラである。
【0015】
そして、長繊維3aは、少なくとも腐食することがなく、しかも、軽量で引張に対して高強度のものであれば良く、好ましくは、耐衝撃性及び耐熱性に優れたものが良い。
【0016】
使用する長繊維3aとしては、例えば、炭素繊維、PBO(ポリパラフェニレンベンズオキサゾール)繊維、アラミド繊維、ケプラー繊維、及び、ザイロン繊維等がある。
【0017】
また、長繊維束3にあらかじめ一定の張力F(例えば、5kg)を加えるのは、プレストレスPを導入する以外に、長繊維3a,3a間の相対的な緩みやずれ変形、さらには、バラツキを是正するためでもある。
【0018】
すなわち、長繊維束3にあらかじめ一定の張力を加えた状態にて、同長繊維束3に接着剤4を全周(全長)にわたって塗布すると共に、同接着剤4を硬化させた後に、固定していた長繊維束3の両端部を後述する補強体製造装置Bに設けた係止片から取り外して、あらかじめ加えていた一定の張力F(例えば、5kg)を解放して、硬化した接着剤4に長繊維束3の伸延方向に沿ったプレストレスPを導入することができる。
【0019】
その結果、長繊維束3の引張強度のバラツキを小さくして、その有効引張強度を増大させると共に、取扱性を良好となすことができ、しかも、接着剤4による長繊維3aの相互の接着性を良好となすことができる。
【0020】
従って、接着剤4としては、高い接着強度を必要としないことから、常温で硬化する安価なものを使用することができ、例えば、常温(20℃〜30℃)で10時間〜48時間後に硬化し、引張強度σ=500kgf/cm〜1,000kgf/cmを有するものを使用することができ、硬化時間は、長繊維束3に直接電流を流してジュール熱(60℃〜70℃弱)を利用すれば、作業条件等に応じて接着剤4の種類を選択することにより、1時間〜2時間の範囲で設定することができる。
【0021】
しかも、かかる接着剤4が硬化した後には一定の張力を解放して、硬化した接着剤4に長繊維束3の伸延方向に沿ったプレストレスPを導入することにより、引張強度を良好に確保した被拘束体K1を、安価にかつ短時間に製造することができる。
【0022】
なお、接着剤4は、長繊維束3の全周(全長)にわたって塗布する以外に、所要の個所に部分的に塗布すると共に、硬化させることもできる。
【0023】
なお、補強体Aの形状は、上記したように直状に形成する場合に限られるものではなく、所要の形状に設計することができて、その他にも例えば、長繊維束3を「V」字状に形成することも、また、長繊維束3を門型に形成することもできる。
【0024】
第1拘束体K2は、図7及び図8に示すように、帯状の長繊維束3を被拘束体K1の外周面に一定の張力を加えながら巻き付けて形成している。
【0025】
第2拘束体K3は、図7及び図8に示すように、第1拘束体K2の外周面に紐状体を一定の張力を加えながら螺旋状に緩解して形成している。
【0026】
ここで、前記したように、本発明に係る補強体Aは、2次元的にプレストレスを導入してなるものであるが、長手方向をX軸、半径方向をr軸、そして、円周方向をθ軸とすれば、硬化した接着剤4にはX軸方向の応力σとr軸方向の応力σ(≒σθ)が働くことになり、σとσとで2次元、σとσとσθ(≒σ)とで3次元となる軸対称問題となるので、2次元的とした。
【0027】
(補強体製造装置の説明)
図8は、前記した補強体Aを製造する補強体製造装置Bを示しており、同補強体製造装置Bは、左右一対の軸支持台10,11を左右方向に一定の間隔を開けて配置し、両軸支持台10,11にそれぞれ回動軸12,13を左右方向に対向させて取り付け、各回動軸12,13に回転体14,15を介して係止片16,17を取り付ける一方、各軸支持台10,11の近傍位置には駆動用モータ18,19を配置して、各駆動用モータ18,19の出力軸20,21と各回動軸12,13との間に伝動ベルト22,23をプーリ24,25,26,27を介して連動連結している。
【0028】
(補強体の製造方法の説明)
次に、前記した補強体製造装置Bにより2次元的にプレストレスを導入した補強体Aの製造方法について説明する。
【0029】
(1)図8に示すように、補強体製造装置Bの両係止片16,17間に接着剤4を塗布した長繊維束3を一定の張力を加えながら所要回数にわたって平行弦状に掛け回して被拘束体K1となす。
【0030】
(2)図8に示すように、細幅帯状となして接着剤4を塗布した長繊維束3を、上記被拘束体K1の左側端部より一定の張力を加えながら螺旋状に巻き付けて被覆することにより第1拘束体K2となす。
【0031】
この際、第1拘束体K2は、細幅帯状となして接着剤4を塗布した長繊維束3の先端部を被拘束体K1である補強体本片1の左側端部に接着して、同状態にて引っ張って一定の張力を加えると共に、左右一対の駆動用モータ18,19を同調させて回動させて、左右一対の係止片16,17間に掛け回した被拘束体K1を左右一対の回動軸12,13の軸線廻りに回転させることにより、長繊維束3を補強体本片1の外周面に巻き付けることができ、さらに、同長繊維束3を補強体本片1と平行に右方向bへゆっくり移動させることにより、同補強体本片1の外周面に簡単に螺旋状に巻き付けて被覆(ラッピング)して形成することができる。cは、被拘束体K1の回転方向を示す。
【0032】
(3)図8に示すように、異形鉄筋と同様に、コンクリートとの付着性能を高める場合には、このラッピングと同時平行して、第1拘束体K2の外周面に第2拘束体K3としての繊維材等の紐状片を右方向dへゆっくり移動させながら略一定のピッチで螺旋状に巻き付ける。
【0033】
(4)図5に示すように、左右方向に1次元的に張力Fを加えられた被拘束体K1と、同被拘束体K1の外周面に被覆(ラッピング)した第1拘束体K2にそれぞれ塗布した接着剤4,4が硬化したところで、各係止片16,17に係止していたアンカー片2, 2を、各係止片16,17から取り外すことにより、加えていた一定の張力Fを開放する。
【0034】
このようにして、図6に示すように、硬化した接着剤4に被拘束体K1の伸延方向(左右方向)に沿ったプレストレスPと、図7に示すように、被拘束体K1の円周方向に沿ったプレストレス(図示せず)とを導入して、同被拘束体K1がその伸延方向と直交する方向(半径方向)に膨張する膨張力f1を第1・第2拘束体K2,K3により拘束して、両第1・第2拘束体K2,K3により被拘束体K1側へ作用する拘束力f2となして、被拘束体K1に導入した1次元的なプレストレスPを第1・第2拘束体K2,K3により封じ込めることができるようにしている。
【0035】
すなわち、1次元的にプレストレスPを導入した棒状の被拘束体K1では、一般に偏心力などによって反り易く、直線性を求められる長尺物に対しては一定の限界があるが、上記したように第1・第2拘束体K2,K3により拘束して2次元的にプレストレスPを導入した補強体Aでは、被拘束体K1に1次元的に作用するプレストレスPは、硬化した接着剤4のマトリックスを圧縮し、同被拘束体K1の方向に膨らもうとし、ひずみを生じる。
【0036】
これに対して、被拘束体K1をラッピングする外周の第1・第2拘束体K2,K3は、この膨らみを抑止し、同被拘束体K1の硬化した接着剤4のマトリックスはその反力として、外方から中心に向かう半径方向に圧縮力を受ける。
【0037】
その結果、被拘束体K1は、2方向(被拘束体K1の伸延方向とその半径方向)のプレストレスを受ける(コンファイン効果を得る)ことになる。これが2次元的なプレストレス原理を補強体Aに導入する例の1つであり、この種の棒材は、主として、引張力材や曲げ材や捩り材等として用いられることになる。
【0038】
このように、上記のようにして製造した棒状の補強体Aでは、被拘束体K1に導入した1次元的なプレストレスPを、設定した通りに確保することができるものである。
【0039】
(補強体の変容例の説明)
図9は、変容例としての補強体Aを示しており、同補強体Aは、被拘束体K1である補強体本片1の外周面に第2拘束体K3を巻回してなるものである。
【0040】
このようにして、被拘束体K1である補強体本片1を第2拘束体K3により拘束して2次元的にプレストレスを導入した補強体Aとなしている。
【0041】
(定着・連結体の説明)
定着・連結体Tは、図1及び図2に示すように、筒状に形成した定着・連結本片30と、同定着・連結本片30の端部に横断・貫通させた係止ピン31と、定着・連結本片30の外周面に形成した雄ネジ部30aにその内周面に形成した雌ネジ部32aを介して螺着した雌ネジ片32とから構成している。
【0042】
定着・連結本片30は、前記補強体Aのアンカー片2を挿入しかつ少なくとも同アンカー片2を被覆可能な筒状体に形成すると共に、一側端部に係止ピン挿入溝33を形成して、同係止ピン挿入溝33を介して定着・連結本片30に係止ピン31を挿入して、横断・貫通状態となすことができるようにする一方、他側端部には充填固化材受け部30cを形成している。
【0043】
従って、定着・連結本片30に補強体Aを連結する際には、定着・連結本片30中に挿通したアンカー片2を、同定着・連結本片30の一側端部より突出させ、同状態にてアンカー片2にあらかじめ係止ピン31を挿通しておき、同係止ピン31を係止ピン挿入溝33中に挿入・係止することにより、定着・連結本片30に補強体Aを定着・連結することができる。
【0044】
また、定着・連結本片30中には接着剤もしくは無収縮高強度モルタル等の充填固定材34を充填する。
【0045】
このようにして、補強体Aを定着・連結本片30と一体化させることができ、この際、補強体Aには第2拘束体K3を設けて、同第2拘束体K3への充填固定材34の付着性を良くしているため、補強体Aを定着・連結本片30に強固に一体化させて固定することができる。
【0046】
そして、定着・連結本片30の他側端部には充填固化材受け部30cを形成しているため、固化した充填固化材34が補強体Aを介して他側端部側へ引張力を受けた場合にも、同充填固化材34が他側端部側より抜け出るのを防止することができる。
【0047】
また、定着・連結本片30の内周面30bは、係止ピン31を挿通した一側端部より他側端部へ向けて漸次縮径させて形成することもでき、この場合には、上記した充填固化材受け部30cと内周面30bとが協働して、充填固化材34が他側端部側より抜け出るのを確実に防止することができる。
【0048】
(適用例)
図10及び図11は、前記した補強材Hのアースアンカーへの適用例を示しており、地滑りを起こす虞のある地山Dに岩盤Gに達する削孔35を形成し、同削孔35中に補強体Aを挿入して、同補強体Aの先端部をグラウトgにより岩盤Gに固定する一方、補強体Aの基端部に定着・連結体Tを定着・連結し、同定着・連結体Tの雌ネジ片32の端面を支持体36を介して台座37に当接させている。38は地中壁、39は多孔質細骨材のモルタルである。
【0049】
このようにして、補強材Hをアースアンカーとして簡単にかつ確実に適用することができる。
【0050】
この際、補強材Hは、係止ピン31に補強体Aのアンカー片2を係止して機械的に固定しているだけであり、しかも、補強体Aは腐食しないことから、同補強体Aが腐食により切断されて遅れ破壊を生じて、定着・連結本片30や雌ネジ片32や支持体36等が飛散されるという不具合の発生を防止することができる。
【0051】
〔第2実施例〕
図12及び図13は、第2実施例としての補強材Hを示しており、同補強材Hは、図14にも示すように、四本の補強体A,A,A,Aを定着・連結体Tに定着・連結している。
【0052】
そして、定着・連結体Tは、前記した第1実施例としての補強材Hの定着・連結体Tと基本的構造を同じくしているが、定着・連結本片30に二個の係止ピン挿入溝33,33を定着・連結本片30の周方向に90度変位させて形成し、各係止ピン挿入溝33,33中にそれぞれ係止ピン31,31を挿通して、各係止ピン31,31にそれぞれ各補強体A,A,A,Aのアンカー片2 ,2,2,2を二本づつ係止している点で異なる。
【0053】
このようにして、二本の係止ピン31,31を定着・連結本片30に十字状に挿通・配置して、各係止ピン31,31に各補強体A,A,A,Aのアンカー片2,2,2,2をコンパクトに係止することができる。
【0054】
〔第3実施例〕
図15及び図16は、第3実施例としての補強材Hを示しており、同補強材Hは、六本の補強体A,A,A,A,A,Aを定着・連結体Tに定着・連結しており、同定着・連結体Tは、定着・連結本片42と被覆・保護片43とから形成している。
【0055】
そして、定着・連結片42は、外周面に雄ネジ部を形成した円筒状の前半連結部44と、同前半連結部44よりも段付き状に拡径させて外周面に雄ネジ部を形成した円筒状の後半定着部45とを一体成形してなり、後半定着部45の周面には軸線方向に伸延するアンカー片収容凹部46を、後半定着部45の円周方向に一定の間隔を開けて六個形成している。
【0056】
しかも、各アンカー片収容凹部46の前部にはアンカー片46を係止するための係止ピン47を突設している。
【0057】
また、被覆・保護片43は、内周面に雌ネジ部を形成した円筒状の被覆部48と、同被覆部48の前部外周面に六角形に膨出させて一体成形した回動操作部49とから形成しており、同回動操作部49にはそれぞれ樹脂充填孔50を形成している。
【0058】
このようにして、定着・連結片42の後半定着部45に形成した六個のアンカー片収容凹部46,46,46,46,46,46に、六本の補強体A,A,A,A,A,Aの各アンカー片2,2,2,2,2,2を収容すると共に、各アンカー片2を係止ピン47に係止し、同状態にて、後半定着部45の外周面に被覆・保護片43の被覆部48を螺着することにより、これらのアンカー片2,2,2,2,2,2の外周を被覆することができる。
【0059】
この際、六本の補強体A,A,A,A,A,Aは、後半定着部45の周面に沿って平行に配置することができ、これらの補強体A,A,A,A,A,Aの中途間にリング状のスペーサ51を配置して、これらの補強体A,A,A,A,A,Aを保形・支持させ、同状態にて、これらの補強体A,A,A,A,A,Aの外周に接着剤を塗布した第1拘束体K2を巻回(ラッピング)している。
【0060】
しかも、各アンカー片収容凹部46内には各樹脂充填孔50を通して樹脂等の充填固定材34を充填して、アンカー片2を保護している。
【0061】
なお、本実施例にかかる補強体Aは、第2拘束体K3を巻回しているが、同第2拘束体K3を巻回しない場合もある。
【0062】
(適用例)
図17は、第3実施例としての補強材Hのトラス構成部材への適用例を示しており、同補強材Hの両端部に設けた前半連結部44,44を、対向状態に配置した連結支持片52,52の連結用雌ネジ部54,54に螺着して連結することにより、トラス構造を簡単にかつ確実に構成することができ、この際、補強材Hは、引張部材として機能させることができる。53はスペーサである。
【0063】
〔第4実施例〕
図18は、第4実施例としての補強材Hを示しており、同補強材Hは、対向させて配置した二本の補強体A,Aのアンカー片2,2を定着・連結体Tにより連結するようにしている。
【0064】
ここで、一方の補強体Aは、アンカー片2,2を二又状に形成して、両アンカー片2,2間に他方の補強体Aのアンカー片2を配置することにより、後述する係止ピン31を介して両補強体本片1,1を略同一直線上に配置して、両補強体A,A間にて引張力がスムーズに伝達されるようにしている。
【0065】
そして、定着・連結体Tは、筒状に形成した定着・連結本片30と、同定着・連結本片30の中途部に横断・貫通させた係止ピン31とから構成している。55は係止ピン挿通孔である。
【0066】
このようにして、一方の補強体Aのアンカー片2を、係止ピン31を介して定着・連結本片30に定着・連結すると共に、他方の補強体Aのアンカー片2を、同係止ピン31を介して定着・連結本片30に定着・連結することにより、両補強体A,Aを簡単に連結することができる。
【0067】
従って、補強体Aを所要本数だけ定着・連結体Tにより連結することにより、所要長さの長尺の補強材Hを形成することができる。
【0068】
そして、かかる補強材Hは、引張部材として利用することができるため、プレテンション部材として、又は、ポストテンション部材として使用することができる。
【0069】
【発明の効果】
(1)請求項1記載の本発明に係る補強材は、一方向に伸延する補強体本片と、同補強体本片の端部に一体成形したループ状のアンカー片とを具備する長繊維強化プラスチック補強体に、上記アンカー片を係止する係止ピンを設けた定着・連結体を装備し、補強体本片とアンカー片は、長繊維束に接着剤を全体的若しくは部分的に塗布し、同接着剤が硬化する前に長繊維束にその伸延方向に沿って一定の張力を加え、同接着剤が硬化した後に一定の張力を解放して一体成形している。
【0070】
このようにして、補強材は、木製・鋼製・コンクリート製の構造物の補強を要する個所に、定着・連結体を介して取り付けることにより、PC鋼材に代えて構造物の補強を図ることができる。
【0071】
この際、補強体本片の端部に一体成形したループ状のアンカー片を、定着・連結体に設けた係止ピンに係止するようにしているため、同アンカー片と定着・連結体との連結を簡単にかつ確実に行なうことができる。
【0072】
しかも、長繊維束は、引張強度を有すると共に軽量であり、かつ、耐食性にも優れているため、土木・建築の既設構造物への長繊維強化プラスチック補強体の取付作業を楽にかつ安価に行うことができ、しかも、既設構造物の重量を大きく増大させることなく、同既設構造物の耐震補強も図れる。
【0073】
さらには、補強材は長繊維強化プラスチック補強体と定着・連結体とを装備しているため、同長繊維強化プラスチック補強体を、例えば、主筋材として使用する場合には、定着・連結体を介して長繊維強化プラスチック補強体同士の連結、ないしは長繊維強化プラスチック補強体と他物との連結を容易に行うことができる。
【0074】
従って、従来の配筋作業において、主筋材として使用していた鉄筋に代えて本発明に係る補強材を使用することにより、溶接作業を不要にすることができて、配筋作業の簡易化と大幅な配筋作業コストの削減が図れると共に、配筋作業時の安全性も向上させることができる。
【0075】
すなわち、長繊維強化プラスチック補強体を形成する長繊維束は、引張強度を有するため、主筋材として十分に機能させることができると共に、軽量(力学的に等価な鉄筋の重量の約40分の1)であるため、取扱性が良く、配筋作業を楽にしかも安全に行うことができる。
【0076】
そのため、熟練を要することなく配筋作業を行うことができて、作業効率と人件費の点から、配筋作業コストを大幅に削減することができる。
【0077】
そして、補強材では、防護用のキャップを被せる必要性がないことから、かかるキャップを被せる手間を省くことができて、この点からも、配筋作業を楽にしかも安全に行うことができる。
【0078】
しかも、従来使用している鉄筋は束ねることが困難でるが、補強材は、容易に束ねてコンパクト化することができて、鉄筋に比べて嵩張ることがない上に、大幅に軽量であるため、大量輸送が楽に行えると共に、輸送コストも大幅に削減することができる。
【0079】
さらには、長繊維強化プラスチック補強体は、耐食性に優れるため、鉄筋に比べて「かぶり」を大幅に小さく設定することができて、その分、コンクリート製構造物の横断面積を小さく設計することができる。
【0080】
従って、鉄筋を使用した場合に比べて、コンクリート製構造物の耐久性及び耐震性を向上させることができると共に、施工期間の短縮、及び、施工費の削減が図れる。
【0081】
すなわち、波際線(波打ち際から陸地側へ250m離れた地点)にコンクリート製構造物を構築する場合、その構造物の寿命保障を100年とすると、性能設計上、コンクリートを形成する水と普通セメントの比(いわゆる、水セメント比)が55%では、「かぶり」を約25cmにする必要性があるが、本発明では、主筋材を形成する長繊維束が腐食しないため、水セメント比や構造物の寿命保証に関わりなく、「かぶり」を可及的に小さく(例えば、2cm〜3cm)設定することができて、その分、コンクリート製構造物の断面積を大幅に小さく設計することができる。
【0082】
その結果、断面積の削減に比例して構造物の重量を軽減することができ、同構造物の重量軽減に比例して基礎の重量や耐震性能を軽減することができるため、基礎工事から構造物の構築作業まで全体的な施工時間や施工費を大幅に削減することができると共に、構造物の寿命を保証する性能設計を精度良く行うことができる。
【0083】
また、主筋材としての長繊維強化プラスチック補強体を形成する長繊維束が腐食しないため、コンクリート製構造物のメンテナンスを不要若しくは大幅に削減することができる。
【0084】
ここで、長繊維束にあらかじめ一定の張力を加えるのは、長繊維間の相対的な緩みやずれ変形、さらには、バラツキを是正するためである。
【0085】
すなわち、長繊維束にあらかじめ一定の張力を加えた状態にて、同長繊維束に接着剤を全体的若しくは部分的に塗布し、同接着剤が硬化する前に長繊維束にその伸延方向に沿って一定の張力を加え、同接着剤が硬化した後に一定の張力を解放して、硬化した接着剤に長繊維束の伸延方向に沿ったプレストレスを導入することができる。
【0086】
その結果、長繊維束の引張強度のバラツキを小さくして、その有効引張強度を増大させると共に、取扱性を良好となすことができ、しかも、接着剤による長繊維の相互の接着性を良好となすことができる。
【0087】
従って、接着剤としては、高い接着強度を必要としないことから、常温で硬化する安価なものを使用することができる。
【0088】
特に、長繊維強化プラスチック補強体の接着剤として、フェノール樹脂系の接着剤を用いた場合には、同長繊維強化プラスチック補強体が不燃性ないしは難燃性になる等の利点を有するため、建築物等に対しては耐火性の面において有利となる。
【0089】
(2)請求項2記載の本発明では、定着・連結体は、少なくともアンカー片を被覆・保護することができるように形成している。
【0090】
このようにして、少なくともアンカー片を定着・連結体により被覆・保護することにより、同アンカー片の損傷等を防止して、補強材の機能を良好に確保することができるようにしている。
【図面の簡単な説明】
【図1】本発明に係る補強材の断面正面図。
【図2】同補強材の側面図。
【図3】長繊維強化プラスチック補強体の正面図。
【図4】長繊維束と同長繊維束に接着剤を塗布する工程説明図。
【図5】2次元的にプレストレスを導入して製造する補強体の製造過程説明図。
【図6】同補強体の製造過程説明図。
【図7】同補強体の断面説明図。
【図8】補強体の製造装置。
【図9】変容例としての補強体の正面図。
【図10】補強体のアースアンカーへの適用例を示す断面説明図。
【図11】同補強体の基端部の拡大断面正面図。
【図12】第2実施例としての補強材の補強体と係止ピンの斜視図。
【図13】同補強材の断面正面図。
【図14】同補強材の側面図。
【図15】第3実施例としての補強材の分解斜視図。
【図16】同補強材の斜視図。
【図17】同補強材のトラス構成部材への適用例を示す説明図。
【図18】第5実施例としての補強材の断面正面図。
【符号の説明】
A 長繊維強化プラスチック補強体
H 補強材
T 定着・連結体
1 補強体本片
2 アンカー片
3 長繊維束
4 接着剤
5 ボビン
6 接着剤槽
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a reinforcement.
[0002]
[Prior art]
Conventionally, a fixing method for fixing a PC steel material via a fixing body has been developed. As the PC steel material, for example, a multilayer PC steel wire obtained by further combining several PC steel 7 strands (JISG-3536) is used. In the fixing body, a sleeve (so-called condominium) is integrated with the end of the PC steel material by cold working, and the outer peripheral surface of the sleeve is threaded to form a male screw portion. A female screw body is screwed into and fixed.
[0003]
[Problems to be solved by the invention]
However, the above-mentioned PC steel material has difficulty in workability due to its large weight, and when a fixing body is provided, the sleeve must be integrated with the end of the PC steel material by cold working. There is a problem that it takes time. Therefore, it has been desired to develop a substitute for a PC steel material that is lightweight, has good workability, and can be easily fixed.
[0004]
[Means for Solving the Problems]
Therefore, in the present invention, the above-mentioned anchor piece is attached to a long-fiber-reinforced plastic reinforcing body comprising a main body piece extending in one direction and a loop-shaped anchor piece integrally formed at an end of the main body piece. Equipped with a fixing / connecting body provided with a locking pin for locking, the main body of the reinforcing body and the anchor piece apply the adhesive to the long fiber bundle entirely or partially, before the adhesive hardens. It is an object of the present invention to provide a reinforcing material characterized in that a certain tension is applied to the long fiber bundle in the direction of elongation thereof, and after the adhesive is cured, the certain tension is released to integrally form the bundle.
[0005]
Further, the present invention is characterized in that the fixing / connecting body is formed so as to cover and protect at least the anchor piece.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
[0007]
That is, the reinforcing material according to the present invention is a long-fiber reinforced plastic reinforcement comprising a reinforcing body piece extending in one direction and a loop-shaped anchor piece integrally formed at an end of the reinforcing body piece. Equipped with a fixing / connecting body provided with a locking pin for locking the anchor piece, the reinforcing body main piece and the anchor piece apply the adhesive to the long fiber bundle entirely or partially, and the adhesive is Before curing, a certain tension is applied to the long fiber bundle along the direction of elongation, and after the adhesive cures, a certain tension is released to form an integral body.
[0008]
The fixing / connecting body is formed so as to cover and protect at least the anchor piece.
[0009]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
[First embodiment]
H shown in FIG. 1 and FIG. 2 is a reinforcing material as a first embodiment according to the present invention, and the reinforcing material H is a long fiber reinforced plastic reinforcement (hereinafter abbreviated as “reinforcement”) A. And a fixing / connecting body T.
[0011]
(Description of reinforcement)
As shown in FIGS. 3 and 6, the reinforcing member A covers the constrained body K1 into which the prestress P is introduced one-dimensionally and the outer peripheral surface of the constrained body K1. A first restraining body K2 for restraining distortion expanding in a direction perpendicular to the direction of extension, and a spirally wound outer peripheral surface of the first restraining body K2, whereby the restrained body K1 is orthogonal to the direction of extension. And a second restraining body K3 for restraining the strain expanding in the direction, and prestress is introduced two-dimensionally.
[0012]
As shown in FIG. 3, the constrained body K1 includes a main body 1 of the reinforcing body extending in one direction, and anchor pieces 2 and 2 integrally formed at both ends of the main body 1 of the same reinforcing body. Each anchor piece 2 is formed in a loop shape.
[0013]
In addition, as shown in FIGS. 3 to 7, the constrained body K1 applies the adhesive 4 to the long fiber bundle 3 as a whole, and before the adhesive 4 cures, the long fiber bundle 3 (for example, the long fiber bundle 3). A constant tension F (for example, 5 kg) was applied to the 12,000 bundles (12K) of the fibers 3a along the direction of extension, and after the adhesive 4 was cured, the constant tension F was released and cured. The prestress P is introduced into the adhesive 4 along the direction in which the long fiber bundle 3 extends.
[0014]
That is, as shown in FIG. 3A, for example, a bundle of 12,000 bundles (12K) of long fibers 3a and 120 bundles can be used, as shown in FIG. As shown in FIG. 3B, the long fiber bundle 3 wound around the bobbin 5 is pulled out, and is dipped in the liquid adhesive 4 on the way to be drawn out in the direction a. Is applied with an adhesive 4. 6 is an adhesive tank, 7 is a draw-out guide roller, and 8 is an immersion guide roller.
[0015]
The long fiber 3a should be at least non-corrosive, lightweight, and high in tensile strength, and preferably has excellent impact resistance and heat resistance.
[0016]
Examples of the long fibers 3a to be used include carbon fibers, PBO (polyparaphenylenebenzoxazole) fibers, aramid fibers, Kepler fibers, and Zylon fibers.
[0017]
Applying a constant tension F (for example, 5 kg) to the long fiber bundle 3 in advance is not only the introduction of the prestress P, but also the relative looseness and shear deformation between the long fibers 3a, 3a, and variation. It is also to correct.
[0018]
That is, while applying a constant tension to the long fiber bundle 3 in advance, the adhesive 4 is applied to the entire long fiber bundle 3 over the entire circumference (full length), and after the adhesive 4 is cured, it is fixed. The both ends of the long fiber bundle 3 are removed from a locking piece provided in a reinforcing body manufacturing apparatus B, which will be described later, and a predetermined tension F (for example, 5 kg) previously applied is released, and the cured adhesive 4 is removed. The prestress P along the direction of extension of the long fiber bundle 3 can be introduced into the slab.
[0019]
As a result, the dispersion of the tensile strength of the long fiber bundle 3 can be reduced, the effective tensile strength can be increased, and the handleability can be improved. In addition, the mutual adhesion of the long fibers 3a by the adhesive 4 can be improved. Can be made favorable.
[0020]
Accordingly, since the adhesive 4 does not require high adhesive strength, an inexpensive one that cures at room temperature can be used. For example, the adhesive 4 cures at room temperature (20 ° C. to 30 ° C.) after 10 hours to 48 hours. And tensile strength σ p = 500kgf / cm 2 ~ 1,000kgf / cm 2 When the joule heat (60 ° C. to 70 ° C. or less) is used by applying an electric current directly to the long fiber bundle 3, the curing time depends on the type of the adhesive 4. Can be set within a range of 1 hour to 2 hours.
[0021]
In addition, after the adhesive 4 is hardened, a certain tension is released, and a prestress P is introduced into the hardened adhesive 4 along the direction in which the long fiber bundle 3 extends, thereby ensuring good tensile strength. The restrained member K1 can be manufactured at low cost and in a short time.
[0022]
In addition to applying the adhesive 4 over the entire circumference (full length) of the long fiber bundle 3, the adhesive 4 can be partially applied to a required portion and cured.
[0023]
The shape of the reinforcing member A is not limited to the case where the reinforcing member A is formed in a straight shape as described above, but can be designed to have a desired shape. It can be formed in a letter shape, or the long fiber bundle 3 can be formed in a portal shape.
[0024]
As shown in FIGS. 7 and 8, the first constraint body K2 is formed by winding a belt-like long fiber bundle 3 around the outer peripheral surface of the restrained body K1 while applying a constant tension.
[0025]
As shown in FIGS. 7 and 8, the second restraining body K3 is formed by loosening a cord-like body on the outer peripheral surface of the first restraining body K2 in a spiral while applying a constant tension.
[0026]
Here, as described above, the reinforcing body A according to the present invention is one in which prestress is introduced two-dimensionally. The longitudinal direction is the X axis, the radial direction is the r axis, and the circumferential direction is the Is the θ axis, the cured adhesive 4 has a stress σ in the X-axis direction. x And r-axis stress σ r (≒ σ θ ) Will work, and σ x And σ r And two-dimensional, σ x And σ r And σ θ (≒ σ r ) Causes a three-dimensional problem of axial symmetry, so two-dimensional.
[0027]
(Explanation of reinforcement production equipment)
FIG. 8 shows a reinforcing-body manufacturing apparatus B for manufacturing the above-described reinforcing body A. The reinforcing-body manufacturing apparatus B has a pair of left and right shaft supports 10 and 11 arranged at predetermined intervals in the left-right direction. Then, the rotating shafts 12 and 13 are attached to the both shaft supports 10 and 11 so as to face each other in the left-right direction, and the locking pieces 16 and 17 are attached to the rotating shafts 12 and 13 via the rotating bodies 14 and 15. Drive motors 18 and 19 are arranged in the vicinity of the shaft supports 10 and 11, and a transmission belt is provided between the output shafts 20 and 21 of the drive motors 18 and 19 and the rotation shafts 12 and 13. 22, 23 are interlockingly connected via pulleys 24, 25, 26, 27.
[0028]
(Explanation of the manufacturing method of the reinforcement)
Next, a description will be given of a method of manufacturing the reinforcing member A in which prestress is introduced two-dimensionally by the above-described reinforcing member manufacturing apparatus B.
[0029]
(1) As shown in FIG. 8, the long fiber bundle 3 coated with the adhesive 4 is applied between the locking pieces 16 and 17 of the reinforcing body manufacturing apparatus B in a parallel chord shape a required number of times while applying a constant tension. Turn to form the restrained body K1.
[0030]
(2) As shown in FIG. 8, the long fiber bundle 3 formed into a narrow band shape and coated with the adhesive 4 is spirally wound from the left end of the constrained body K1 while applying a constant tension to cover it. By doing so, the first constraint body K2 is formed.
[0031]
At this time, the first constraining body K2 is formed by adhering the distal end of the long fiber bundle 3 coated with the adhesive 4 in the form of a narrow band to the left end of the reinforcing body main piece 1 which is the constrained body K1. In the same state, a certain tension is applied by pulling, and the pair of left and right driving motors 18 and 19 are tuned and rotated to rotate the restrained body K1 hung between the pair of left and right locking pieces 16 and 17. By rotating the pair of left and right rotating shafts 12 and 13 around the axis, the long fiber bundle 3 can be wound around the outer peripheral surface of the main body 1 of the reinforcing member. By moving slowly in the right direction b in parallel with the above, the reinforcing body main piece 1 can be formed by simply spirally winding around the outer peripheral surface and covering (wrapping). c indicates the rotation direction of the constrained body K1.
[0032]
(3) As shown in FIG. 8, in the case of increasing the adhesion performance to concrete, similarly to the deformed reinforcing bar, in parallel with this lapping, a second constraint K3 is formed on the outer peripheral surface of the first constraint K2. Is wound spirally at a substantially constant pitch while slowly moving the string-like piece of the fiber material or the like in the right direction d.
[0033]
(4) As shown in FIG. 5, the restrained body K1 to which the tension F is applied one-dimensionally in the left-right direction and the first restrained body K2 covering (wrapping) the outer peripheral surface of the restrained body K1 are respectively provided. When the applied adhesives 4 and 4 have hardened, the anchor pieces 2 and 2 that have been locked on the locking pieces 16 and 17 are removed from the locking pieces 16 and 17 to apply a constant tension. Release F.
[0034]
In this way, as shown in FIG. 6, the pre-stress P along the extension direction (left-right direction) of the constrained body K1 is applied to the cured adhesive 4 and the circle of the constrained body K1 as shown in FIG. By introducing a prestress (not shown) along the circumferential direction, the expansion force f1 for expanding the constrained body K1 in a direction (radial direction) orthogonal to the extension direction of the constrained body K1 is increased by the first and second constraining bodies K2. , K3, and the one-dimensional prestress P introduced into the constrained body K1 as the constraining force f2 acting on the constrained body K1 by the first and second constraining bodies K2, K3. The first and second restraining members K2 and K3 can be used for containment.
[0035]
That is, in the rod-shaped constrained body K1 in which the prestress P is introduced one-dimensionally, it is generally easily warped due to an eccentric force or the like, and there is a certain limit for a long object requiring linearity. In the reinforcing member A in which the prestress P is introduced two-dimensionally by being constrained by the first and second constraining members K2 and K3, the prestress P acting one-dimensionally on the constrained member K1 is hardened adhesive. 4 is compressed and tries to expand in the direction of the constrained body K1, thereby causing distortion.
[0036]
On the other hand, the first and second restraining members K2 and K3 on the outer periphery for wrapping the restraining member K1 suppress this bulging, and the matrix of the cured adhesive 4 of the restraining member K1 acts as a reaction force. And compressive force in the radial direction from the outside toward the center.
[0037]
As a result, the constrained body K1 receives prestress in two directions (the extension direction of the constrained body K1 and its radial direction) (obtains a confine effect). This is one example of introducing the two-dimensional prestress principle into the reinforcing member A, and this type of bar is mainly used as a tensile member, a bending member, a torsion member, or the like.
[0038]
Thus, in the bar-shaped reinforcing member A manufactured as described above, the one-dimensional prestress P introduced into the constrained member K1 can be secured as set.
[0039]
(Explanation of the transformation example of the reinforcement)
FIG. 9 shows a reinforcing body A as a modified example. The reinforcing body A is formed by winding a second restraining body K3 around the outer peripheral surface of a reinforcing body main piece 1 which is a restrained body K1. .
[0040]
In this way, the main body 1 of the reinforcing body, which is the constrained body K1, is constrained by the second constraining body K3 to form the reinforcing body A in which prestress is introduced two-dimensionally.
[0041]
(Explanation of fixing / connecting body)
As shown in FIGS. 1 and 2, the fixing / connecting body T includes a fixing / connecting main piece 30 formed in a tubular shape, and a locking pin 31 traversed and penetrated through an end of the identification attaching / connecting main piece 30. And a female screw piece 32 screwed to a male screw part 30a formed on the outer peripheral surface of the fixing / connection main piece 30 via a female screw part 32a formed on the inner peripheral surface thereof.
[0042]
The fixing / connecting main piece 30 is formed into a tubular body into which the anchor piece 2 of the reinforcing body A can be inserted and at least covers the anchor piece 2, and a locking pin insertion groove 33 is formed at one end. Then, the locking pin 31 is inserted into the fixing / connecting main piece 30 through the locking pin insertion groove 33 so that the fixing pin 31 can be in the crossing / penetration state, while the other end is filled. A solidified material receiving portion 30c is formed.
[0043]
Therefore, when connecting the reinforcing member A to the fixing / connecting piece 30, the anchor piece 2 inserted into the fixing / connecting piece 30 is made to protrude from one side end of the identification attaching / connecting piece 30. In the same state, the locking pin 31 is inserted through the anchor piece 2 in advance, and the locking pin 31 is inserted and locked into the locking pin insertion groove 33, thereby reinforcing the fixing / connecting main piece 30. A can be fixed and connected.
[0044]
The fixing / connecting main piece 30 is filled with a filling and fixing material 34 such as an adhesive or a non-shrinkable high-strength mortar.
[0045]
In this manner, the reinforcing member A can be integrated with the fixing / connecting main piece 30. At this time, the reinforcing member A is provided with the second restraining member K3, and is filled and fixed to the second restraining member K3. Since the adhesiveness of the material 34 is improved, the reinforcing member A can be firmly integrated with the fixing / connecting main piece 30 and fixed.
[0046]
Since the filling and solidifying material receiving portion 30c is formed at the other end of the fixing / connecting main piece 30, the solidified filling and solidifying material 34 applies a tensile force to the other end through the reinforcing member A. Even when it is received, it is possible to prevent the same solidified material 34 from coming out from the other end.
[0047]
Further, the inner peripheral surface 30b of the fixing / connecting main piece 30 can be formed by gradually reducing the diameter from one side end through which the locking pin 31 is inserted toward the other side end. In this case, The above-described filled solidified material receiving portion 30c and the inner peripheral surface 30b cooperate to reliably prevent the filled solidified material 34 from falling out from the other end.
[0048]
(Application example)
FIGS. 10 and 11 show an example in which the above-mentioned reinforcing material H is applied to an earth anchor. A drill hole 35 reaching a rock mass G is formed in a ground D where a landslide may occur. The reinforcing member A is inserted into the rocker G, and the front end of the reinforcing member A is fixed to the bedrock G by grout g. The end surface of the female screw 32 of the body T is in contact with the pedestal 37 via the support 36. 38 is an underground wall, 39 is a mortar of porous fine aggregate.
[0049]
In this way, the reinforcing material H can be easily and reliably applied as a ground anchor.
[0050]
At this time, the reinforcing member H is only mechanically fixed by locking the anchor piece 2 of the reinforcing member A to the locking pin 31. Further, since the reinforcing member A does not corrode, the reinforcing member H It is possible to prevent the occurrence of a problem that the fixing / connection main piece 30, the female screw piece 32, the support member 36, and the like are scattered due to the fact that A is cut by corrosion to cause delayed destruction.
[0051]
[Second embodiment]
12 and 13 show a reinforcing member H as a second embodiment. As shown in FIG. 14, the reinforcing member H has four reinforcing members A, A, A, and A fixed thereto. It is fixed and connected to the connecting body T.
[0052]
The fixing / connecting body T has the same basic structure as the fixing / connecting body T of the reinforcing material H as the first embodiment described above. The insertion grooves 33, 33 are formed by being displaced by 90 degrees in the circumferential direction of the fixing / connecting main piece 30, and the locking pins 31, 31 are inserted into the locking pin insertion grooves 33, 33, respectively. The difference is that two anchor pieces 2, 2, 2, 2 of each reinforcing member A, A, A, A are respectively locked to the pins 31, 31.
[0053]
In this manner, the two locking pins 31, 31 are inserted and arranged in a cross shape in the fixing / connecting main piece 30, and the respective reinforcing pins A, A, A, A, A are inserted into the locking pins 31, 31. The anchor pieces 2, 2, 2, 2 can be locked compactly.
[0054]
[Third embodiment]
FIGS. 15 and 16 show a reinforcing member H as a third embodiment. The reinforcing member H is formed by fixing six reinforcing members A, A, A, A, A, A to a fixing / connecting member T. The identification and connection body T is fixed and connected, and is formed of a fixing and connection piece 42 and a covering and protecting piece 43.
[0055]
The fixing / connecting piece 42 has a cylindrical front half connecting portion 44 having a male screw portion formed on the outer peripheral surface, and a stepped shape larger than the front half connecting portion 44 to form a male screw portion on the outer peripheral surface. The second half fixing portion 45 is formed integrally with the cylindrical second half fixing portion 45, and an anchor piece accommodating concave portion 46 extending in the axial direction is formed on the peripheral surface of the second half fixing portion 45 at a constant interval in the circumferential direction of the second half fixing portion 45. Open to form six.
[0056]
Moreover, a locking pin 47 for locking the anchor piece 46 is provided at the front of each of the anchor piece accommodating recesses 46.
[0057]
The covering / protecting piece 43 has a cylindrical covering portion 48 having a female screw portion formed on an inner peripheral surface thereof, and a rotating operation integrally formed by bulging into a hexagonal shape on a front outer peripheral surface of the covering portion 48. The rotary operation part 49 is formed with a resin filling hole 50.
[0058]
In this manner, the six reinforcements A, A, A, A, A are provided in the six anchor piece receiving recesses 46, 46, 46, 46, 46, 46 formed in the rear fixing section 45 of the fixing / connecting piece 42. , A, and A, the anchor pieces 2, 2, 2, 2, 2, 2 are accommodated, and each anchor piece 2 is locked on a locking pin 47. By screwing the covering portion 48 of the covering / protecting piece 43 onto the outer periphery of the anchor piece 2, 2, 2, 2, 2, 2, it can be covered.
[0059]
At this time, the six reinforcements A, A, A, A, A, A can be arranged in parallel along the peripheral surface of the latter half fixing portion 45, and these reinforcements A, A, A, A, A , A, A, a ring-shaped spacer 51 is arranged in the middle, and these reinforcing members A, A, A, A, A, A, A are shaped and supported. , A, A, A, A, A, the first restraining body K2 having an adhesive applied to the outer periphery thereof is wound (wrapped).
[0060]
In addition, each anchor piece accommodating recess 46 is filled with a filling material 34 such as resin through each resin filling hole 50 to protect the anchor piece 2.
[0061]
In addition, although the reinforcement body A according to the present embodiment winds the second constraint body K3, the reinforcement body A may not wind the second constraint body K3 in some cases.
[0062]
(Application example)
FIG. 17 shows an example in which the reinforcing member H is applied to a truss constituent member as the third embodiment, and the first half connecting portions 44, 44 provided at both ends of the reinforcing member H are connected in a facing state. The truss structure can be simply and reliably configured by screwing and connecting to the connecting female screw portions 54 of the support pieces 52, 52. At this time, the reinforcing member H functions as a tension member. Can be done. 53 is a spacer.
[0063]
[Fourth embodiment]
FIG. 18 shows a reinforcing member H as a fourth embodiment. The reinforcing member H is formed by fixing and connecting the anchor pieces 2 and 2 of two reinforcing members A and A arranged to face each other. They are connected.
[0064]
Here, one reinforcing member A is formed by forming the anchor pieces 2 and 2 in a bifurcated shape, and by disposing the anchor piece 2 of the other reinforcing member A between the two anchor pieces 2 and 2, The two main reinforcement pieces 1 and 1 are arranged on substantially the same straight line via the retaining pin 31 so that the tensile force is smoothly transmitted between the two reinforcements A and A.
[0065]
The fixing / connecting body T is composed of a fixing / connecting main piece 30 formed in a tubular shape, and a locking pin 31 traversed and penetrated in the middle of the identification attaching / connecting main piece 30. Reference numeral 55 denotes a locking pin insertion hole.
[0066]
In this way, the anchor piece 2 of one reinforcing member A is fixedly connected to the fixing / connecting main piece 30 via the locking pin 31 and the anchor piece 2 of the other reinforcing member A is locked together. By fixing and connecting to the fixing / connecting main piece 30 via the pin 31, the two reinforcing bodies A can be easily connected.
[0067]
Therefore, by connecting the required number of the reinforcing members A by the fixing / connecting members T, it is possible to form the reinforcing member H having a required length.
[0068]
And since such a reinforcing material H can be used as a tension member, it can be used as a pretension member or a post tension member.
[0069]
【The invention's effect】
(1) The reinforcing material according to the first aspect of the present invention is a long fiber comprising: a main body of a reinforcing body extending in one direction; and a loop-shaped anchor piece integrally formed at an end of the main body of the reinforcing body. The reinforced plastic reinforcement is equipped with a fixing / connecting body provided with a locking pin for locking the anchor piece, and the reinforcing piece and the anchor piece are entirely or partially coated with an adhesive to the long fiber bundle. Then, a certain tension is applied to the long fiber bundle in the elongation direction before the adhesive is hardened, and a certain tension is released after the adhesive is hardened to form an integral body.
[0070]
In this way, the reinforcing material is attached to the place where reinforcement of the wooden / steel / concrete structure is required via the anchoring / connecting body, so that the structure can be reinforced in place of the PC steel material. it can.
[0071]
At this time, since the loop-shaped anchor piece integrally formed at the end of the main body of the reinforcing member is locked to the locking pin provided on the fixing / connecting body, the anchor piece and the fixing / connecting body are connected to each other. Can be easily and reliably connected.
[0072]
Moreover, since the long fiber bundle has a tensile strength, is lightweight, and has excellent corrosion resistance, the work of attaching the long fiber reinforced plastic reinforcement to the existing structure of civil engineering and construction can be performed easily and at low cost. The seismic reinforcement of the existing structure can be achieved without significantly increasing the weight of the existing structure.
[0073]
Furthermore, since the reinforcing material is equipped with a long fiber reinforced plastic reinforcement and a fixing / connecting body, when the same long fiber reinforced plastic reinforcing body is used as a main reinforcement, for example, the fixing / connecting body is used. The connection between the long-fiber-reinforced plastic reinforcements or the connection between the long-fiber-reinforced plastic reinforcement and another object can be easily performed.
[0074]
Therefore, in the conventional reinforcing work, by using the reinforcing material according to the present invention instead of the reinforcing steel used as the main reinforcing material, the welding work can be made unnecessary, and the reinforcing work can be simplified. It is possible to significantly reduce the reinforcing work cost and improve the safety at the time of the reinforcing work.
[0075]
That is, since the long fiber bundle forming the long fiber reinforced plastic reinforcement has a tensile strength, it can function sufficiently as a main reinforcing member, and can be lightened (about 40 times less than the weight of a mechanically equivalent reinforcing bar). ), The handleability is good, and the bar arrangement work can be performed easily and safely.
[0076]
Therefore, the arrangement work can be performed without skill, and the arrangement work cost can be significantly reduced in terms of work efficiency and labor cost.
[0077]
And, since there is no need to put a protective cap on the reinforcing material, the labor for putting on such a cap can be omitted, and from this point also, the reinforcing work can be performed easily and safely.
[0078]
In addition, it is difficult to bundle the reinforcing bars used in the past, but the reinforcing material can be easily bundled and compacted, it is not bulky compared to the reinforcing bars, and it is significantly lighter, Mass transportation can be performed easily, and transportation costs can be greatly reduced.
[0079]
Furthermore, since the long fiber reinforced plastic reinforcement has excellent corrosion resistance, the "cover" can be set significantly smaller than that of rebar, and the cross-sectional area of a concrete structure can be designed accordingly. it can.
[0080]
Therefore, the durability and the earthquake resistance of the concrete structure can be improved as compared with the case where a reinforcing bar is used, and the construction period can be shortened and the construction cost can be reduced.
[0081]
That is, when a concrete structure is constructed on the shoreline (a point 250 m away from the shore to the land side), assuming that the service life of the structure is 100 years, the water that forms the concrete and the ordinary cement When the ratio (so-called water-cement ratio) is 55%, it is necessary to set the “cover” to about 25 cm. However, in the present invention, since the long fiber bundle forming the main reinforcement does not corrode, Regardless of the service life guarantee of the object, the "fogging" can be set as small as possible (for example, 2 cm to 3 cm), and accordingly, the cross-sectional area of the concrete structure can be designed to be much smaller. .
[0082]
As a result, the weight of the structure can be reduced in proportion to the reduction of the cross-sectional area, and the weight and seismic performance of the foundation can be reduced in proportion to the weight reduction of the structure. It is possible to greatly reduce the entire construction time and construction cost up to the construction work of the object, and to accurately perform the performance design that guarantees the life of the structure.
[0083]
In addition, since the long fiber bundle forming the long fiber reinforced plastic reinforcement as the main reinforcement does not corrode, maintenance of the concrete structure can be eliminated or greatly reduced.
[0084]
Here, the reason why a constant tension is applied to the long fiber bundle in advance is to correct the relative loosening and shear deformation between the long fibers, and furthermore, the dispersion.
[0085]
That is, in a state where a certain tension is applied to the long fiber bundle in advance, the adhesive is applied to the long fiber bundle in whole or in part, and the long fiber bundle is applied to the long fiber bundle in the direction of extension before the adhesive is cured. A certain tension is applied along the adhesive, and a certain tension is released after the adhesive is cured, so that a prestress along the elongation direction of the long fiber bundle can be introduced into the cured adhesive.
[0086]
As a result, the dispersion of the tensile strength of the long fiber bundle can be reduced, the effective tensile strength can be increased, and the handleability can be improved. In addition, the mutual adhesion of the long fibers by the adhesive can be improved. I can do it.
[0087]
Therefore, an inexpensive adhesive that cures at room temperature can be used because it does not require high adhesive strength.
[0088]
In particular, when a phenolic resin-based adhesive is used as an adhesive for a long-fiber-reinforced plastic reinforcement, the same long-fiber-reinforced plastic reinforcement has advantages such as incombustibility or flame retardancy. It is advantageous in terms of fire resistance for objects and the like.
[0089]
(2) According to the second aspect of the present invention, the fixing / connecting body is formed so as to cover and protect at least the anchor piece.
[0090]
In this way, by covering and protecting at least the anchor piece with the anchoring / connecting body, damage to the anchor piece and the like can be prevented, and the function of the reinforcing material can be secured well.
[Brief description of the drawings]
FIG. 1 is a sectional front view of a reinforcing material according to the present invention.
FIG. 2 is a side view of the reinforcing member.
FIG. 3 is a front view of a long fiber reinforced plastic reinforcement.
FIG. 4 is an explanatory view of a long fiber bundle and a step of applying an adhesive to the same long fiber bundle.
FIG. 5 is an explanatory view of a manufacturing process of a reinforcing member manufactured by introducing two-dimensional prestress.
FIG. 6 is an explanatory view of a manufacturing process of the reinforcing member.
FIG. 7 is an explanatory sectional view of the reinforcing body.
FIG. 8 is an apparatus for manufacturing a reinforcing member.
FIG. 9 is a front view of a reinforcing body as a modification.
FIG. 10 is an explanatory cross-sectional view showing an application example of a reinforcing body to a ground anchor.
FIG. 11 is an enlarged cross-sectional front view of a base end of the reinforcement.
FIG. 12 is a perspective view of a reinforcing member of a reinforcing material and a locking pin as a second embodiment.
FIG. 13 is a sectional front view of the reinforcing member.
FIG. 14 is a side view of the reinforcing member.
FIG. 15 is an exploded perspective view of a reinforcing member according to a third embodiment.
FIG. 16 is a perspective view of the reinforcing member.
FIG. 17 is an explanatory view showing an example in which the reinforcing material is applied to a truss component.
FIG. 18 is a sectional front view of a reinforcing member according to a fifth embodiment.
[Explanation of symbols]
A long fiber reinforced plastic reinforcement
H reinforcement
T fixation, connection
1 Reinforcement main piece
2 Anchor pieces
3 long fiber bundle
4 adhesive
5 bobbins
6 adhesive tank

Claims (2)

一方向に伸延する補強体本片と、同補強体本片の端部に一体成形したループ状のアンカー片とを具備する長繊維強化プラスチック補強体に、上記アンカー片を係止する係止ピンを設けた定着・連結体を装備し、
補強体本片とアンカー片は、長繊維束に接着剤を全体的若しくは部分的に塗布し、同接着剤が硬化する前に長繊維束にその伸延方向に沿って一定の張力を加え、同接着剤が硬化した後に一定の張力を解放して一体成形したことを特徴とする補強材。
A locking pin for locking the anchor piece to a long-fiber reinforced plastic reinforcement body including a main body piece extending in one direction and a loop-shaped anchor piece integrally formed at an end of the main body piece. Equipped with a fixing and connecting body with
The reinforcing piece and the anchor piece are applied with an adhesive to the long fiber bundle entirely or partially, and before the adhesive hardens, a constant tension is applied to the long fiber bundle along the direction of extension, and the same. A reinforcing material characterized in that a certain amount of tension is released after the adhesive has hardened, and the molding is integrally formed.
定着・連結体は、少なくともアンカー片を被覆・保護することができるように形成したことを特徴とする請求項1記載の補強材。The reinforcing material according to claim 1, wherein the fixing / connecting body is formed so as to cover and protect at least the anchor piece.
JP2002194706A 2002-07-03 2002-07-03 Reinforcing material Pending JP2004036219A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007074840A1 (en) * 2005-12-27 2007-07-05 Toshiaki Ohta Fiber-reinforced plastic rod, structure made of carbon-fiber-reinforced plastic, and structural body constituted of the structure made of carbon-fiber-reinforced plastic
EP1945878A1 (en) * 2005-11-04 2008-07-23 BBA Blackbull AS Reinforcement for concrete elements and system and method for producing reinforced concrete elements
DE102007011987A1 (en) * 2007-03-09 2008-09-18 Technische Universität Chemnitz Tension rod system for building and hall girder, has metal casings connected with tension rod in force fit, form fit and material fit manner, where metal casings exhibit fire-retardant enclosure including internal teeth
WO2011059062A1 (en) * 2009-11-13 2011-05-19 日本コアパートナー株式会社 Solar power device suspended in air
CN104802230A (en) * 2015-05-05 2015-07-29 南京林业大学 Prestress reinforced recombined bamboo production mold
JP2017030816A (en) * 2015-08-03 2017-02-09 三菱樹脂インフラテック株式会社 Brace reinforcement structure
JP2020117602A (en) * 2019-01-22 2020-08-06 戸田建設株式会社 Structure with stripe-shaped fiber-reinforced reinforcer and method for manufacturing the same
CN112064504A (en) * 2020-09-09 2020-12-11 清华大学 Self-anchored carbon fiber inhaul cable

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1945878A1 (en) * 2005-11-04 2008-07-23 BBA Blackbull AS Reinforcement for concrete elements and system and method for producing reinforced concrete elements
EP1945878A4 (en) * 2005-11-04 2014-09-10 Reforcetech As Reinforcement for concrete elements and system and method for producing reinforced concrete elements
WO2007074840A1 (en) * 2005-12-27 2007-07-05 Toshiaki Ohta Fiber-reinforced plastic rod, structure made of carbon-fiber-reinforced plastic, and structural body constituted of the structure made of carbon-fiber-reinforced plastic
JP5048516B2 (en) * 2005-12-27 2012-10-17 俊昭 太田 Carbon fiber reinforced plastic structure and housing formed from this carbon fiber reinforced plastic structure
DE102007011987A1 (en) * 2007-03-09 2008-09-18 Technische Universität Chemnitz Tension rod system for building and hall girder, has metal casings connected with tension rod in force fit, form fit and material fit manner, where metal casings exhibit fire-retardant enclosure including internal teeth
WO2011059062A1 (en) * 2009-11-13 2011-05-19 日本コアパートナー株式会社 Solar power device suspended in air
CN104802230A (en) * 2015-05-05 2015-07-29 南京林业大学 Prestress reinforced recombined bamboo production mold
JP2017030816A (en) * 2015-08-03 2017-02-09 三菱樹脂インフラテック株式会社 Brace reinforcement structure
JP2020117602A (en) * 2019-01-22 2020-08-06 戸田建設株式会社 Structure with stripe-shaped fiber-reinforced reinforcer and method for manufacturing the same
JP7218187B2 (en) 2019-01-22 2023-02-06 戸田建設株式会社 Structural structure provided with streaky fiber reinforced reinforcing material and method for manufacturing the same
CN112064504A (en) * 2020-09-09 2020-12-11 清华大学 Self-anchored carbon fiber inhaul cable

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