JP4460124B2 - Band plate composite FRP lattice material and concrete reinforcing method using the band plate composite FRP lattice material - Google Patents

Band plate composite FRP lattice material and concrete reinforcing method using the band plate composite FRP lattice material Download PDF

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JP4460124B2
JP4460124B2 JP2000231232A JP2000231232A JP4460124B2 JP 4460124 B2 JP4460124 B2 JP 4460124B2 JP 2000231232 A JP2000231232 A JP 2000231232A JP 2000231232 A JP2000231232 A JP 2000231232A JP 4460124 B2 JP4460124 B2 JP 4460124B2
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JP2002038655A (en
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健一 関根
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日鉄コンポジット株式会社
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    • 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

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  • Working Measures On Existing Buildindgs (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Road Paving Structures (AREA)
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  • Lining And Supports For Tunnels (AREA)
  • Reinforcement Elements For Buildings (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、格子状の繊維強化樹脂（ＦＲＰ）部材に、帯状シートのＦＲＰ部材を複合させた板複合ＦＲＰ格子材に関するものであり、特に、例えば、コンクリートの剥落防止部材として、例えばトンネル、更には、梁、柱、桁、壁、床板、煙突、給水槽等の補修、補強（以後単に「補強」という。）のために好適に使用し得るＦＲＰ帯板複合格子状ＦＲＰ部材に関するものであり、又、斯かる帯板複合ＦＲＰ格子材を使用したコンクリート補強方法に関するものである。
【０００２】
【従来の技術】
例えば、老朽化した、クラックの発生などの問題のあるトンネル内部のコンクリート剥落防止を目的としたトンネルの内面補強工法として、炭素繊維等の高強度強化繊維に常温硬化型エポキシ樹脂を十分に含浸させ、シート状に硬化させた連続繊維シート（ＦＲＰ材）をトンネル覆工部に接着樹脂にて貼り付ける工法が採用されているが、大量の常温接着樹脂を硬化させるため、施工も短時間で行うことが困難で、設計も高度な設計・施工技術を要し、高価な工法となり、対応可能な施工業者も限られる。
【０００３】
そこで、連続繊維シートを用いた工法より安価で、施工が確実・容易な、図９に示すようなＦＲＰ格子材１００が開発された。
【０００４】
このＦＲＰ格子材１００は、図１０をも参照するとよりよく理解されるように、通常、直角に交差して格子状に配置された複数の筋、即ち、縦格子筋１０１と横格子筋１０２とからなり、各筋１０１、１０２は、主にガラス繊維、炭素繊維、アラミド繊維等の強化繊維を一方向に並べて、ビニルエステル樹脂等のマトリックス樹脂を含浸させた帯状強化繊維を複数積層して形成されたものである。また、各筋１０１、１０２は、筋幅（ｗ）３〜１０ｍｍ、厚さ（ｔ）１〜５ｍｍ、であり、格子間距離（Ｗ１）３〜１５ｃｍの格子板状に成形硬化され、全体としてシート状のＦＲＰ格子材１００を形成する。このＦＲＰ格子材１００は、図１０に示すように筋の交差部分の厚さが他の部分の厚さと等しくなるように成形硬化されている。
【０００５】
このＦＲＰ格子材１００は、図１１のＦＲＰ格子材施工図に示すように、コンクリート３の表面に、アンカー４で固定することによりコンクリート構造物に取り付けられる。その後、ＦＲＰ格子材１００に、ポリマーセメント６を吹き付け、手塗りして、構築物と一体化させて所定の厚さＴ（＝１０ｍｍ〜２０ｍｍ）に被覆する。
【０００６】
このＦＲＰ格子材１００は鉄筋と同様の補強効果があり、鉄筋よりも軽くて、腐食も少なく、施工もアンカーでとめることができるため、施行が簡便である。
【０００７】
【発明が解決しようとする課題】
しかしながら、このＦＲＰ格子材１００をコンクリート表面に取りつけるに際して、図１２（ａ）のように、筋１０１、１０２を貫通してアンカーボルト４を打ち付けた場合には、アンカーボルト４が貫通している部分の筋１０１、１０２の繊維が切断され、本来のＦＲＰ材の強度が失われる。
【０００８】
一方、図１２（ｂ）のように、筋１０１、１０２の、特に交差部分近くの角の部分にて、座板５及びアンカーボルト４を利用して格子材１００を取り付けた場合には、アンカーボルト４及び座板５の一部分しか筋に接触しておらず、取付力が不足し、多数のアンカーを必要とした。
【０００９】
従って、ＦＲＰ格子材本来の補強性の維持、トンネル覆工部への取付安定性、更にはより補強力の増大等といった更なる改良が望まれていた。
【００１０】
従って、本発明の目的は、例えばコンクリート剥落防止材として、トンネル、梁、柱、桁、壁、床板、煙突、給水槽などにおいて、アンカーを用いて簡便に取り付けることができ、更に、強力な補強力を持つ帯板複合ＦＲＰ格子材を提供することである。
【００１１】
本発明の他の目的は、上記帯板複合ＦＲＰ格子材を使用して、補強作業を容易に、短時間に、かつ、確実に行うことのできる、例えば、トンネル、梁、柱、桁、壁、床板、煙突、給水槽などにおけるコンクリート剥落を防止するための補強方法を提供することである。
【００１２】
【課題を解決するための手段】
上記目的は本発明に係る帯板複合ＦＲＰ格子材、及び帯板複合ＦＲＰ格子材を使用した補強方法にて達成される。要約すれば、第１の本発明によれば、繊維強化樹脂とされる複数の筋を格子状に配置して形成されたＦＲＰ格子材と、前記ＦＲＰ格子材に規則的に或いは不規則的に所定の間隔を持って互いに平行に配列して取付けられた第１の帯板とを有する帯板複合ＦＲＰ格子材において、
（Ａ）前記各帯板は、平行な少なくとも２本の前記筋に重なるようにし、隣接した前記２本の筋にて形成される単位格子列を埋めるようにして、配置されるか、又は、
（Ｂ）前記各帯板は、平行な隣接する２本の前記筋にて形成される単位格子列の中央部で分割され、所定の間隙にて対向配置する態様で前記筋に取り付けられる、
ことを特徴とする帯板複合ＦＲＰ格子材を提供する。
【００１３】
第１の本発明の一実施態様によれば、複数の前記筋は互いに直交して格子状に配置されている。
【００１５】
第１の本発明の他の実施態様によれば、前記複数の筋は、互いに３〜１５ｃｍ離間して格子状に配置され、また、前記複数の筋は、幅が３〜１０ｍｍ、厚さが１〜５ｍｍとすることができる。
【００１６】
第１の本発明の他の実施態様によれば、前記各帯板は、帯状の繊維強化樹脂である。
【００１７】
第１の本発明の他の実施態様によれば、前記帯状の繊維強化樹脂は、強化繊維を少なくとも一方向に配列した帯状強化繊維シートにマトリクス樹脂を含浸し、硬化して形成されるか、前記帯状の繊維強化樹脂は、強化繊維を織成したクロス或いは強化繊維からなるマットにマトリクス樹脂を含浸し、硬化して形成される。
【００１８】
第１の本発明の他の実施態様によれば、前記各帯板は、繊維目付１００〜１０００ｇ／ｍ2、樹脂含浸量が３０〜７０ｗｔ％、厚さが１〜５ｍｍである。
【００１９】
第１の本発明の他の実施態様によれば、前記強化繊維は、炭素繊維、ガラス繊維、セラミックス繊維を含む無機繊維；ボロン、チタン、スチールなどの金属繊維；アラミド、ポリエステル、ポリエチレン、ナイロン、ＰＢО、高強度ポリプロピレンなどの有機繊維；などから選択されるいずれかの繊維であるか、或いは、前記繊維を複数種混入したハイブリッドタイプとされ、また、前記マトリクス樹脂は、ビニルエステル樹脂、不飽和ポリエステル樹脂、ポリアミド樹脂、常温硬化型エポキシ樹脂、熱硬化型エポキシ樹脂、ポリカーボネート樹脂、又は、ＭＭＡなどのラジカル反応系樹脂を少なくとも一種以上含む。
【００２０】
第２の本発明は、前記帯板複合ＦＲＰ格子材の、少なくとも前記帯板部分を、接着樹脂により、コンクリート構造物に張り付けることを特徴とするコンクリート補強方法を提供する。
【００２１】
第２の本発明の一実施態様によると、前記帯板複合ＦＲＰ格子材の前記帯板部分を利用してコンクリート構造物にアンカーどめされる。
【００２２】
第２の本発明の他の実施態様によると、複数の前記帯板複合ＦＲＰ格子材は、互いに隣り合った前記帯板複合ＦＲＰ格子材の帯板を互いに重ね合わせ、この重ね合わせた部分を貼り合わせて、コンクリート構造物にアンカーどめし、複数の前記帯板複合ＦＲＰ格子材を互いに接続する。
【００２３】
第２の本発明の他の実施態様によると、前記帯板複合ＦＲＰ格子材をコンクリート構造物に施工後に、必要に応じて更に、前記所定の帯板の上に帯状の繊維強化樹脂部材を、貼付する。
【００２４】
【発明の実施の形態】
以下、本発明に係る帯板複合ＦＲＰ格子材及び帯板複合ＦＲＰ格子材を使用したコンクリートの補強方法を図面に則して更に詳しく説明する。
【００２５】
実施例１
図１に本発明の帯板複合ＦＲＰ格子材１の一実施例を示す。本発明の帯板複合ＦＲＰ格子材１は、従来と同様の繊維強化樹脂（ＦＲＰ）にて形成されたＦＲＰ格子材１００に、帯板２００を複合させた構成に特徴を有する。帯板２００は、本実施例では、帯状の繊維強化樹脂（ＦＲＰ）にて作製されるものとする。
【００２６】
更に説明すると、本実施例にて、帯板複合ＦＲＰ格子材１は、図９及び図１０に示す従来のＦＲＰ格子材１００と同様のＦＲＰ格子材１００を有する。即ち、本実施例にて、ＦＲＰ格子材１００は、通常、直角に交差して格子状に配置された複数の筋、即ち、縦格子筋１０１と横格子筋１０２とを備えている。各筋１０１、１０２は、主にガラス繊維、炭素繊維、アラミド繊維等の強化繊維を一方向に並べて、ビニルエステル樹脂等のマトリックス樹脂を含浸させた強化繊維を複数積層し、硬化して形成される。ＦＲＰ格子材１００は、通常、筋幅（ｗ）３〜１０ｍｍ、厚さ（ｔ）１〜５ｍｍ、であり、格子間距離（Ｗ１）３〜１５ｃｍとされる。上述のように、各筋１０１、１０２は、互いに直交して配置されるが、所望に応じて互いに９０度以外の所定の角度にて交差し、格子状となるように構成することも可能である。
【００２７】
通常、強化繊維としてガラス繊維を使用した場合には、ＦＲＰ格子材１００は５００Ｎ／ｍｍ2以上の引張強度、３００００Ｎ／ｍｍ2以上の引張弾性率を有している。
【００２８】
又、このような構成のＦＲＰ格子材１００は、軽量で、耐食性であり、又、曲げ易く、施工性に優れている。また、図１０に示すように、筋１０１、１０２の交差部分が他の筋部分と略同一平面上にあり、薄いシート状とされ、重ねてもかさばらない。
【００２９】
更に、本実施例によると、シート状のＦＲＰ格子材１００の表面には、所定の間隔にて互いに平行にＦＲＰ帯板２００が取付けられる。
【００３０】
ＦＲＰ帯板２００は、本実施例では、縦格子筋１０１に沿って、２本の縦格子筋１０１に重なるようにし、同方向の単位格子列（本明細書では隣接する２本の筋にて形成される一方向の格子列を意味するものとする。）を埋めるようにして、配置される。ＦＲＰ帯板２００は、ＦＲＰ格子材１００の成形時に、完全に硬化しない状態にて、或いは樹脂未含浸にてＦＲＰ格子材１００に積層して取り付けられ、筋１０１、１０２と共に樹脂含浸、硬化されるので、帯板２００と筋１０１、１０２は一体化され、筋１０１、１０２と帯板２００は同一平面になる。帯板複合ＦＲＰ格子材１の作製方法は、上記のものに限定されるものではなく、種々の方法を採用し得る。
【００３１】
また、ＦＲＰ帯板２００は、図２に示すように、単位格子列９列置きといったように規則的に配置される。ただ、ＦＲＰ帯板２００の配置態様はこれに限定されるものではなく、ＦＲＰ格子材１００が使用される用途に応じて任意に配置される。一例を挙げれば、ＦＲＰ帯板２００は、例えば、筋１０１、１０２の間隔が５ｃｍとされる場合には、単位格子列９列置きに、又、筋１０１、１０２の間隔が１０ｃｍとされる場合には、単位格子列５列置きといった具合に配置することができる。
【００３２】
本実施例にて、ＦＲＰ帯板２００は、上述のように、帯状の繊維強化樹脂とされ、強化繊維を一方向に配列した帯状強化繊維シートにマトリクス樹脂を含浸し、硬化して形成される。又、帯状の強化繊維シートは、強化繊維を織成したクロス或いは強化繊維からなるマットとすることもできる。ＦＲＰ帯板２００における繊維目付は、１００〜１０００ｇ／ｍ2、樹脂含浸量は３０〜７０ｗｔ％、厚さは、通常、１〜５ｍｍとされる。
【００３３】
本発明におけるＦＲＰ筋及びＦＲＰ帯板に使用する強化繊維は、炭素繊維、ガラス繊維、セラミックス繊維を含む無機繊維；ボロン、チタン、スチールなどの金属繊維；アラミド、ポリエステル、ポリエチレン、ナイロン、ＰＢО、高強度ポリプロピレンなどの有機繊維；などから選択されるいずれかの繊維であるか、或いは、前記繊維を複数種混入したハイブリッドタイプとし得る。マトリクス樹脂としては、ビニルエステル樹脂、不飽和ポリエステル樹脂、ポリアミド樹脂、常温硬化型エポキシ樹脂、熱硬化型エポキシ樹脂、ポリカーボネート樹脂等の樹脂を使用することができる。
【００３４】
本発明の帯板複合ＦＲＰ格子材１は、ＦＲＰ格子材１００に、例えばＦＲＰとされる帯板２００を複合することによって、コンクリート構造物に取り付けた場合、より大きなコンクリート塊の剥落防止を達成し得る。
【００３５】
特に、本実施例の帯板複合ＦＲＰ格子材１は、上述のように、ＦＲＰ格子材１００と、ＦＲＰ帯板２００を材料としているので、軽く、巻回した状態でも搬送でき、運搬、加工が容易である。
【００３６】
上記構成の本発明の帯板複合ＦＲＰ格子材１をトンネル覆工部に設置した態様を図３に示す。帯板複合ＦＲＰ格子材１は、帯板２００がトンネルの周方向となるように配置される。
【００３７】
本発明の帯板複合ＦＲＰ格子材１は、帯板２００部分を接着樹脂によりコンクリート構造物に貼りつけられる。
【００３８】
更に、本発明の帯板複合ＦＲＰ格子材１は、図４に示すように、筋１０１、１０２に重ならない帯板２００部分に、好ましくは座板５を介してアンカーボルト４を打ち込むことによって固定することができる。従って、筋１０１、１０２の強化繊維を切断することはない。
【００３９】
上述のように、帯板複合ＦＲＰ格子材１は薄く、帯板部分に塗着された接着樹脂にてコンクリート構造物に貼りつけられた後に、アンカーボルト４を帯板２００に打ち込むことによってコンクリート構造物に固定されて取りつけられるので、図５に示すように、２枚の隣接する帯板複合ＦＲＰ格子材１Ａ、１Ｂを平面方向に接続するときは、接続する両帯板複合ＦＲＰ格子材１Ａ、１Ｂの帯板２００部分を重ね合わせて接着樹脂で接着し、アンカーボルト４を打ち込むことによって達成される。
【００４０】
このように、本発明の帯板複合ＦＲＰ格子材は、帯板を利用してアンカーボルト４によりコンクリート構造物に取付けることができるので、帯板２００をコンクリート構造物に接着する接着樹脂の硬化を待つといった必要はなく、補強作業を容易に、短時間に、且つ確実に行うことができ、更には、従来のＦＲＰ格子材に比べて、取りつけ安定性が優れている。
【００４１】
更に、コンクリート構造物に施工された帯板複合ＦＲＰ格子材１の補強を増大させることが必要な場合には、コンクリート構造物に施工された帯板複合ＦＲＰ格子材１の帯板２００部分の上に、帯状の繊維強化樹脂シートを接着樹脂で貼り付け、更にアンカーボルトで固定することもできる。この帯状の繊維強化樹脂シートは、帯板２００と同様の材料を使用することができる。
【００４２】
実施例２
実施例１では、帯板２００は、隣り合った２本の筋にて形成される単位格子列の全面にわたって取り付けられるものとしたが、図６に示すように、単位格子列の中央部にて分割され、間隙Ｇにて対向配置する態様で筋１０１、１０２に取りつけることも可能である。
【００４３】
この場合には、アンカーボルト４は、帯板２００を貫通させることなく、２枚の帯板２００の間隙Ｇ部分にアンカーボルト４を打ち込むことによって取りつけることもできる。勿論、座板５が帯板２００に適当な面積で接触する。
【００４４】
実施例３
図７に、本発明の帯板複合ＦＲＰ格子材の他の実施例を示す。本実施例では、更に第２の帯板２０１が、上記第１の帯板２００に交差する態様で配置し、ＦＲＰ格子材１００に取付けられる。
【００４５】
本実施例によれば、本発明の帯板複合ＦＲＰ格子材１の第２の帯板２０１配列方向における引張強度をも向上させることができ、帯板複合ＦＲＰ格子材１の補強効果を増大させる。
【００４６】
実施例４
図８に、本発明の帯板複合ＦＲＰ格子材の他の実施例を示す。本実施例では、帯板２００が、縦格子筋１０１に沿って、３本の縦格子筋１０１に重なるようにし、同方向の２列の単位格子列を埋めるようにして取り付けられる。
【００４７】
本実施例にて、ＦＲＰ帯板２００は、単位格子列６列置いて配置されているが、実施例１にて説明したように、ＦＲＰ帯板２００の配置態様はこれに限定されるものではなく、ＦＲＰ格子材１００が使用される用途に応じて任意に配置される。
【００４８】
本実施例の帯板複合ＦＲＰ格子材においても、帯板２００と交差する態様で第２の帯板を配置することも可能である。
【００４９】
実施例５
上記本発明の帯板複合ＦＲＰ格子材１を使用して、図３に示すように、トンネルの内側部分にコンクリート剥落防止のための補強工事をした。帯板複合ＦＲＰ格子材１は、図４に示すように、その帯板２００部分を利用して、座板５及びアンカーボルト４にてコンクリート面に取付けたが、筋部分を損傷することなく、容易に、迅速に、しかも極めて安定して設置することができた。
【００５０】
また、帯板複合ＦＲＰ格子材の帯板部分に、塊が引っ掛かるので、大きなコンクリート塊の剥落を防止できた。
【００５１】
【発明の効果】
以上説明したように，本発明によれば、繊維強化樹脂とされる複数の筋を格子状に配置して形成されたＦＲＰ格子材と、前記ＦＲＰ格子材に規則的に或いは不規則的に所定の間隔を持って互いに平行に配列して取付けられた第１の帯板とを有する帯板複合ＦＲＰ格子材において、
（Ａ）各帯板は、平行な少なくとも２本の筋に重なるようにし、隣接した２本の筋にて形成される単位格子列を埋めるようにして、配置されるか、又は、
（Ｂ）各帯板は、平行な隣接する２本の筋にて形成される単位格子列の中央部で分割され、所定の間隙にて対向配置する態様で筋に取り付けられる、
構成とされるので、従来のＦＲＰ格子板の長所である軽量、可撓性、耐食性、などの良好な性質は損なうことなく、大き目のコンクリート塊の剥落は帯板部をも利用して防止することができ、小さ目のコンクリート塊の剥落は筋にて防止することができ、広範囲なコンクリート剥落を有効に防止し得る。
【００５２】
また、本発明に係る帯板複合ＦＲＰ格子材を使用したコンクリート補強方法は、帯板複合ＦＲＰ格子材の、少なくとも帯板部分を、接着樹脂により、コンクリート構造物に貼り付けることができ、また、帯板複合ＦＲＰ格子材は、帯板を利用してアンカーボルトによりコンクリート構造物に取付けることができ、帯板複合ＦＲＰ格子材をコンクリート構造物表面に接着するための接着樹脂の硬化を待つといった必要はなく、補強作業を容易に、短時間に、且つ確実に行うことができ、更には、従来のＦＲＰ格子材に比べて、取り付け安定性が著しく向上する。
【図面の簡単な説明】
【図１】本発明に係る帯板複合ＦＲＰ格子材の一実施例の斜視図である。
【図２】本発明に係る帯板複合ＦＲＰ格子材の一実施例の平面図である。
【図３】本発明に係る帯板複合ＦＲＰ格子材をトンネル覆工部へ施工した態様を示す図である。
【図４】本発明に係る帯板複合ＦＲＰ格子材をアンカーどめした状態を説明する平面図である。
【図５】本発明に係る帯板複合ＦＲＰ格子材の接続方法を説明する断面図である。
【図６】本発明に係る帯板複合ＦＲＰ格子材の他の実施例の平面図である。
【図７】本発明に係る帯板複合ＦＲＰ格子材の他の実施例の平面図である。
【図８】本発明に係る帯板複合ＦＲＰ格子材の他の実施例の平面図である。
【図９】ＦＲＰ格子材の斜視図である。
【図１０】ＦＲＰ格子材の拡大斜視図である。
【図１１】従来のＦＲＰ格子材の施工態様を説明する施工図である。
【図１２】従来のＦＲＰ格子材のアンカーどめ態様を説明する平面図である。
【符号の説明】
１、１Ａ、１Ｂ 帯板複合ＦＲＰ格子材
３ コンクリート構造物
４ アンカーボルト
５ ＦＲＰ座板
６ ポリマーセメント
１００ ＦＲＰ格子材
１０１ 縦格子筋
１０２ 横格子筋
２００ 第１の帯板
２０１ 第２の帯板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate composite FRP lattice material obtained by combining a lattice-like fiber reinforced resin (FRP) member with an FRP member of a belt-like sheet, and particularly, for example, as a concrete peeling prevention member, for example, a tunnel, Relates to an FRP strip composite lattice FRP member that can be suitably used for repair and reinforcement (hereinafter simply referred to as “reinforcement”) of beams, columns, girders, walls, floor boards, chimneys, water tanks, etc. The present invention also relates to a concrete reinforcing method using such a strip composite FRP lattice material.
[0002]
[Prior art]
For example, as a method of reinforcing the inner surface of a tunnel for the purpose of preventing concrete peeling inside a tunnel that has problems such as aging and cracks, carbon fiber and other high-strength reinforcing fibers are sufficiently impregnated with room temperature curable epoxy resin. In addition, a continuous fiber sheet (FRP material) cured in the form of a sheet is applied to the tunnel lining part with an adhesive resin, but since a large amount of room temperature adhesive resin is cured, construction is also performed in a short time. It is difficult to design, requires advanced design and construction techniques, becomes an expensive construction method, and the number of contractors who can handle it is limited.
[0003]
Therefore, an FRP lattice material 100 as shown in FIG. 9 has been developed, which is cheaper than a construction method using a continuous fiber sheet and is reliable and easy to construct.
[0004]
As will be better understood with reference also to FIG. 10, the FRP lattice material 100 is generally composed of a plurality of lines arranged in a lattice pattern intersecting at right angles, that is, a vertical lattice line 101 and a horizontal lattice line 102. Each of the streaks 101 and 102 is formed by laminating a plurality of band-like reinforcing fibers in which reinforcing fibers such as glass fibers, carbon fibers, and aramid fibers are arranged in one direction and impregnated with a matrix resin such as a vinyl ester resin. It has been done. In addition, each of the stripes 101 and 102 has a stripe width (w) of 3 to 10 mm and a thickness (t) of 1 to 5 mm, and is molded and cured into a lattice plate shape having an interstitial distance (W1) of 3 to 15 cm. A sheet-like FRP lattice material 100 is formed. As shown in FIG. 10, the FRP lattice material 100 is molded and cured so that the thickness of the crossing portion of the streaks is equal to the thickness of the other portions.
[0005]
The FRP lattice material 100 is attached to a concrete structure by being fixed to the surface of the concrete 3 with anchors 4 as shown in the FRP lattice material construction diagram of FIG. Thereafter, the polymer cement 6 is sprayed on the FRP lattice material 100, and is applied by hand to be integrated with the structure and coated to a predetermined thickness T (= 10 mm to 20 mm).
[0006]
Since this FRP lattice material 100 has the same reinforcing effect as a reinforcing bar, is lighter than a reinforcing bar, has little corrosion, and can be stopped by an anchor, it is easy to implement.
[0007]
[Problems to be solved by the invention]
However, when attaching the FRP lattice material 100 to the concrete surface, as shown in FIG. 12A, when the anchor bolt 4 is driven through the bars 101 and 102, the portion through which the anchor bolt 4 passes. The fibers of the streaks 101 and 102 are cut, and the strength of the original FRP material is lost.
[0008]
On the other hand, as shown in FIG. 12B, when the lattice material 100 is attached using the seat plate 5 and the anchor bolts 4 at the corners of the muscles 101 and 102, particularly near the intersection, Only a part of the bolt 4 and the seat plate 5 is in contact with the muscle, the mounting force is insufficient, and a large number of anchors are required.
[0009]
Therefore, further improvements such as maintaining the original reinforcing property of the FRP lattice material, mounting stability to the tunnel lining, and further increasing the reinforcing force have been desired.
[0010]
Therefore, the object of the present invention is to be able to easily attach using anchors in tunnels, beams, columns, girders, walls, floor boards, chimneys, water tanks, etc. It is to provide a strip composite FRP lattice material having strength.
[0011]
Another object of the present invention is to use the above-described strip composite FRP lattice material to perform a reinforcing operation easily, in a short time, and reliably, for example, tunnels, beams, columns, girders, walls. It is to provide a reinforcing method for preventing concrete peeling in floor boards, chimneys, water tanks and the like.
[0012]
[Means for Solving the Problems]
The above object is achieved by a strip composite FRP lattice material according to the present invention and a reinforcing method using the strip composite FRP lattice material. In summary, according to the first aspect of the present invention, an FRP lattice material formed by arranging a plurality of streaks, which are fiber reinforced resins, in a lattice shape, and the FRP lattice material regularly or irregularly. in strip composite FRP grating material to have a a first strip attached to arranged parallel to one another at a predetermined interval,
(A) Each of the strips is arranged so as to overlap at least two of the parallel stripes and fill a unit cell row formed by the adjacent two stripes, or
(B) Each of the strips is divided at a central portion of a unit cell array formed by two parallel adjacent stripes, and is attached to the stripes in a manner of being opposed to each other with a predetermined gap.
A strip composite FRP lattice material is provided.
[0013]
According to an embodiment of the first aspect of the present invention, the plurality of the streaks are arranged in a lattice pattern orthogonal to each other.
[0015]
According to another embodiment of the first aspect of the present invention, the plurality of streaks are arranged in a lattice pattern 3-15 cm apart from each other, and the plurality of streaks have a width of 3-10 mm and a thickness of It can be 1-5 mm.
[0016]
According to another embodiment of the first invention, each of the strips is a strip-shaped fiber reinforced resin.
[0017]
According to another embodiment of the first aspect of the present invention, the band-shaped fiber reinforced resin is formed by impregnating a matrix resin into a band-shaped reinforcing fiber sheet in which reinforcing fibers are arranged in at least one direction and curing the sheet. The band-shaped fiber reinforced resin is formed by impregnating a matrix resin made of cloth or a woven fiber made of reinforced fibers and then curing the matrix resin.
[0018]
According to another embodiment of the first invention, each of the band plates has a fiber basis weight of 100 to 1000 g / m 2 , a resin impregnation amount of 30 to 70 wt%, and a thickness of 1 to 5 mm.
[0019]
According to another embodiment of the first invention, the reinforcing fibers include inorganic fibers including carbon fibers, glass fibers, and ceramic fibers; metal fibers such as boron, titanium, and steel; aramids, polyesters, polyethylenes, nylons, PBO, organic fiber such as high-strength polypropylene, or the like, or a hybrid type in which a plurality of the fibers are mixed, and the matrix resin is a vinyl ester resin, unsaturated It includes at least one radical reaction resin such as polyester resin, polyamide resin, room temperature curable epoxy resin, thermosetting epoxy resin, polycarbonate resin, or MMA.
[0020]
2nd this invention provides the concrete reinforcement method characterized by sticking at least the said strip part of the said strip composite FRP lattice material to a concrete structure with adhesive resin.
[0021]
According to an embodiment of the second aspect of the present invention, the band plate portion of the band plate composite FRP lattice material is used to anchor to a concrete structure.
[0022]
According to another embodiment of the second aspect of the present invention, a plurality of the strip composite FRP lattice members are overlapped with each other adjacent to the strip composite FRP lattice members, and the overlapped portions are pasted. At the same time, it is anchored to the concrete structure, and the plurality of strip composite FRP lattice members are connected to each other.
[0023]
According to another embodiment of the second aspect of the present invention, after the strip composite FRP lattice material is applied to the concrete structure, if necessary, a strip-shaped fiber reinforced resin member is further formed on the predetermined strip. Affix it.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the strip composite FRP lattice material and the concrete reinforcing method using the strip composite FRP lattice material according to the present invention will be described in more detail with reference to the drawings.
[0025]
Example 1
FIG. 1 shows an embodiment of a strip composite FRP lattice material 1 of the present invention. The strip composite FRP lattice material 1 of the present invention is characterized in that the strip plate 200 is combined with the FRP lattice material 100 formed of the same fiber reinforced resin (FRP) as in the prior art. In this embodiment, the band plate 200 is made of a band-shaped fiber reinforced resin (FRP).
[0026]
More specifically, in this embodiment, the strip composite FRP lattice material 1 has the same FRP lattice material 100 as the conventional FRP lattice material 100 shown in FIGS. In other words, in the present embodiment, the FRP lattice material 100 is usually provided with a plurality of stripes that intersect at right angles and are arranged in a lattice pattern, that is, the vertical lattice stripes 101 and the horizontal lattice stripes 102. Each of the streaks 101 and 102 is mainly formed by arranging a plurality of reinforcing fibers impregnated with a matrix resin such as a vinyl ester resin by arranging reinforcing fibers such as glass fibers, carbon fibers, and aramid fibers in one direction. The The FRP lattice material 100 usually has a line width (w) of 3 to 10 mm, a thickness (t) of 1 to 5 mm, and an interstitial distance (W1) of 3 to 15 cm. As described above, the respective stripes 101 and 102 are arranged orthogonal to each other, but can be configured to cross each other at a predetermined angle other than 90 degrees and to form a lattice shape as desired. is there.
[0027]
Usually, when using glass fibers as reinforcing fibers, FRP grating member 100 has 500 N / mm 2 or more in tensile strength, the 30000 N / mm 2 or more tensile modulus.
[0028]
Further, the FRP lattice material 100 having such a configuration is lightweight, corrosion-resistant, easy to bend, and excellent in workability. Also, as shown in FIG. 10, the crossing portions of the streaks 101 and 102 are substantially on the same plane as the other streaks, and are formed in a thin sheet shape, so that they are not bulky.
[0029]
Further, according to the present embodiment, the FRP strips 200 are attached to the surface of the sheet-like FRP lattice material 100 in parallel with each other at a predetermined interval.
[0030]
In this embodiment, the FRP strip 200 is overlapped with the two vertical lattice stripes 101 along the vertical lattice stripes 101, and is arranged in the unit lattice row in the same direction (in this specification, by two adjacent stripes). It is assumed to mean a grid row formed in one direction.) The FRP band plate 200 is attached to the FRP lattice material 100 in a state where the FRP lattice material 100 is not completely cured or unimpregnated with the resin, and is impregnated and cured together with the streaks 101 and 102 when the FRP lattice material 100 is molded. Therefore, the strip 200 and the stripes 101 and 102 are integrated, and the stripes 101 and 102 and the strip 200 are in the same plane. The production method of the strip composite FRP lattice material 1 is not limited to the above, and various methods can be adopted.
[0031]
Further, as shown in FIG. 2, the FRP strips 200 are regularly arranged such as every nine unit cell rows. However, the arrangement | positioning aspect of the FRP strip 200 is not limited to this, It is arbitrarily arrange | positioned according to the use for which the FRP lattice material 100 is used. For example, in the FRP strip 200, for example, when the distance between the streaks 101 and 102 is 5 cm, the unit cell array is arranged every nine rows, and the distance between the streaks 101 and 102 is 10 cm. Can be arranged such as every 5 unit cell rows.
[0032]
In this embodiment, as described above, the FRP band plate 200 is a band-shaped fiber reinforced resin, and is formed by impregnating a matrix resin into a band-shaped reinforcing fiber sheet in which reinforcing fibers are arranged in one direction and curing. . The belt-like reinforcing fiber sheet may be a cloth made of woven reinforcing fibers or a mat made of reinforcing fibers. The fiber basis weight in the FRP strip 200 is 100 to 1000 g / m 2 , the resin impregnation amount is 30 to 70 wt%, and the thickness is usually 1 to 5 mm.
[0033]
The reinforcing fibers used for the FRP streaks and FRP strips in the present invention are inorganic fibers including carbon fibers, glass fibers and ceramic fibers; metal fibers such as boron, titanium and steel; aramid, polyester, polyethylene, nylon, PBO, high It can be any fiber selected from organic fibers such as strength polypropylene; or a hybrid type in which a plurality of the fibers are mixed. As the matrix resin, a resin such as a vinyl ester resin, an unsaturated polyester resin, a polyamide resin, a room temperature curable epoxy resin, a thermosetting epoxy resin, or a polycarbonate resin can be used.
[0034]
The band composite FRP lattice material 1 of the present invention achieves prevention of larger concrete lump removal when it is attached to a concrete structure by combining the FRP lattice material 100 with a band plate 200 made of, for example, FRP. obtain.
[0035]
In particular, since the strip composite FRP lattice material 1 of the present embodiment is made of the FRP lattice material 100 and the FRP strip 200 as described above, it can be transported in a light and wound state, and can be transported and processed. Easy.
[0036]
The aspect which installed the strip board composite FRP lattice material 1 of this invention of the said structure in the tunnel lining part is shown in FIG. The strip composite FRP lattice material 1 is disposed so that the strip 200 is in the circumferential direction of the tunnel.
[0037]
In the strip composite FRP lattice material 1 of the present invention, the strip 200 is bonded to a concrete structure with an adhesive resin.
[0038]
Furthermore, as shown in FIG. 4, the strip composite FRP lattice material 1 of the present invention is fixed by driving anchor bolts 4 into a portion of the strip 200 that does not overlap the stripes 101 and 102, preferably via the seat plate 5. can do. Therefore, the reinforcing fibers of the muscles 101 and 102 are not cut.
[0039]
As described above, the strip composite FRP lattice material 1 is thin, and after being attached to a concrete structure with an adhesive resin applied to the strip portion, the anchor bolt 4 is driven into the strip plate 200 to provide a concrete structure. As shown in FIG. 5, when two adjacent strip composite FRP lattice members 1A and 1B are connected in a plane direction, as shown in FIG. This is achieved by overlapping the 1B band plate 200 parts and bonding them with an adhesive resin, and driving the anchor bolts 4.
[0040]
Thus, since the strip composite FRP lattice material of the present invention can be attached to a concrete structure by the anchor bolt 4 using the strip, the adhesive resin that bonds the strip 200 to the concrete structure can be cured. There is no need to wait, and the reinforcement work can be performed easily, in a short time, and reliably, and further, the mounting stability is superior to the conventional FRP lattice material.
[0041]
Further, when it is necessary to increase the reinforcement of the strip composite FRP lattice material 1 applied to the concrete structure, the upper portion of the strip 200 of the composite strip FRP lattice material 1 applied to the concrete structure is used. Further, a belt-like fiber reinforced resin sheet can be attached with an adhesive resin, and further fixed with an anchor bolt. The belt-like fiber reinforced resin sheet can use the same material as that of the belt plate 200.
[0042]
Example 2
In the first embodiment, the band plate 200 is attached over the entire surface of the unit cell array formed by two adjacent streaks. However, as shown in FIG. It is also possible to attach to the muscles 101 and 102 in such a manner that they are divided and arranged opposite each other in the gap G.
[0043]
In this case, the anchor bolt 4 can be attached by driving the anchor bolt 4 into the gap G between the two strips 200 without penetrating the strips 200. Of course, the seat plate 5 contacts the strip plate 200 in an appropriate area.
[0044]
Example 3
FIG. 7 shows another embodiment of the strip composite FRP lattice material of the present invention. In the present embodiment, the second strip 201 is further arranged in a manner intersecting the first strip 200 and attached to the FRP lattice material 100.
[0045]
According to the present embodiment, the tensile strength in the arrangement direction of the second strip 201 of the strip composite FRP lattice material 1 of the present invention can be improved, and the reinforcing effect of the strip composite FRP lattice 1 is increased. .
[0046]
Example 4
FIG. 8 shows another embodiment of the strip composite FRP lattice material of the present invention. In the present embodiment, the band plate 200 is attached so as to overlap the three vertical lattice stripes 101 along the vertical lattice stripes 101 and fill the two unit lattice rows in the same direction.
[0047]
In the present embodiment, the FRP strips 200 are arranged in six unit cell rows. However, as described in the first embodiment, the arrangement of the FRP strips 200 is not limited to this. Rather, the FRP lattice material 100 is arbitrarily arranged depending on the application in which it is used.
[0048]
Also in the strip composite FRP lattice material of the present embodiment, it is possible to dispose the second strip in a manner that intersects with the strip 200.
[0049]
Example 5
Using the strip composite FRP lattice material 1 of the present invention, as shown in FIG. 3, reinforcement work for preventing concrete peeling was performed on the inner part of the tunnel. As shown in FIG. 4, the band plate composite FRP lattice material 1 is attached to the concrete surface with the seat plate 5 and the anchor bolt 4 using the band plate 200 portion, but without damaging the muscle portion, It was easy, quick and extremely stable.
[0050]
Further, since the lump is caught on the band plate portion of the band plate composite FRP lattice material, the large concrete lump can be prevented from being peeled off.
[0051]
【The invention's effect】
As described above , according to the present invention , an FRP lattice material formed by arranging a plurality of streaks, which are fiber reinforced resins, in a lattice shape, and the FRP lattice material is regularly or irregularly defined. in strip composite FRP grating material with a spacing to have a a first strip attached to arranged parallel to one another,
(A) Each strip is arranged so as to overlap at least two parallel stripes and fill a unit cell row formed by two adjacent stripes, or
(B) Each strip is divided at the center of the unit cell array formed by two parallel adjacent stripes, and is attached to the stripes in a manner of facing each other with a predetermined gap.
Because it is configured, the good properties such as light weight, flexibility, corrosion resistance, etc. that are the advantages of the conventional FRP lattice plate are not impaired, and the stripping of large concrete blocks is also prevented using the strip plate portion. The small concrete block can be prevented from peeling off with a streak, and a wide range of concrete peeling can be effectively prevented.
[0052]
Moreover, the concrete reinforcement method using the strip composite FRP lattice material according to the present invention can attach at least the strip portion of the strip composite FRP lattice material to the concrete structure with an adhesive resin. The strip composite FRP lattice material can be attached to the concrete structure by anchor bolts using the strip plate, and it is necessary to wait for the curing of the adhesive resin for bonding the strip composite FRP lattice material to the concrete structure surface. However, the reinforcing operation can be performed easily, in a short time, and reliably, and the mounting stability is significantly improved as compared with the conventional FRP lattice material.
[Brief description of the drawings]
FIG. 1 is a perspective view of an embodiment of a strip composite FRP lattice material according to the present invention.
FIG. 2 is a plan view of an embodiment of a strip composite FRP lattice material according to the present invention.
FIG. 3 is a view showing a mode in which a strip composite FRP lattice material according to the present invention is applied to a tunnel lining portion.
FIG. 4 is a plan view for explaining a state in which a strip composite FRP lattice material according to the present invention is anchored.
FIG. 5 is a cross-sectional view illustrating a method for connecting strip composite FRP lattice members according to the present invention.
FIG. 6 is a plan view of another embodiment of the strip composite FRP lattice material according to the present invention.
FIG. 7 is a plan view of another embodiment of a strip composite FRP lattice material according to the present invention.
FIG. 8 is a plan view of another embodiment of the strip composite FRP lattice material according to the present invention.
FIG. 9 is a perspective view of an FRP lattice material.
FIG. 10 is an enlarged perspective view of an FRP lattice material.
FIG. 11 is a construction diagram illustrating a construction mode of a conventional FRP lattice material.
FIG. 12 is a plan view for explaining an anchoring mode of a conventional FRP lattice material.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 1A, 1B Strip composite FRP lattice material 3 Concrete structure 4 Anchor bolt 5 FRP seat plate 6 Polymer cement 100 FRP lattice material 101 Vertical lattice reinforcement 102 Horizontal lattice reinforcement 200 First belt strip 201 Second strip

Claims (15)

繊維強化樹脂とされる複数の筋を格子状に配置して形成されたＦＲＰ格子材と、前記ＦＲＰ格子材に規則的に或いは不規則的に所定の間隔を持って互いに平行に配列して取付けられた第１の帯板とを有する帯板複合ＦＲＰ格子材において、
前記各帯板は、平行な少なくとも２本の前記筋に重なるようにし、隣接した前記２本の筋にて形成される単位格子列を埋めるようにして、配置されることを特徴とする帯板複合ＦＲＰ格子材。An FRP lattice material formed by arranging a plurality of streaks made of fiber reinforced resin in a lattice shape, and attached to the FRP lattice material regularly or irregularly with a predetermined interval in parallel. In the strip composite FRP lattice material having the first strip formed,
Each of the strips is arranged so as to overlap at least two of the parallel streaks and to fill a unit cell row formed by the adjacent two streaks. Composite FRP lattice material. 繊維強化樹脂とされる複数の筋を格子状に配置して形成されたＦＲＰ格子材と、前記ＦＲＰ格子材に規則的に或いは不規則的に所定の間隔を持って互いに平行に配列して取付けられた第１の帯板とを有する帯板複合ＦＲＰ格子材において、
前記各帯板は、平行な隣接する２本の前記筋にて形成される単位格子列の中央部で分割され、所定の間隙にて対向配置する態様で前記筋に取り付けられることを特徴とする帯板複合ＦＲＰ格子材。An FRP lattice material formed by arranging a plurality of streaks made of fiber reinforced resin in a lattice shape, and attached to the FRP lattice material regularly or irregularly with a predetermined interval in parallel. In the strip composite FRP lattice material having the first strip formed,
Each of the strips is divided at a central portion of a unit cell array formed by two parallel adjacent stripes, and is attached to the stripes so as to face each other with a predetermined gap. Strip composite FRP lattice material. 複数の前記筋は互いに直交して格子状に配置されていることを特徴とする請求項１又は２の帯板複合ＦＲＰ格子材。  The strip composite FRP lattice material according to claim 1 or 2, wherein the plurality of streaks are arranged orthogonally to each other in a lattice shape. 前記複数の筋は、互いに３〜１５ｃｍ離間して格子状に配置されることを特徴とする請求項１〜３のいずれかの項に記載の帯板複合ＦＲＰ格子材。The strip composite FRP lattice material according to any one of claims 1 to 3 , wherein the plurality of streaks are arranged in a lattice shape with a spacing of 3 to 15 cm from each other. 前記複数の筋は、幅が３〜１０ｍｍ、厚さが１〜５ｍｍとされることを特徴とする請求項４の帯板複合ＦＲＰ格子材。5. The strip composite FRP lattice material according to claim 4 , wherein the plurality of stripes have a width of 3 to 10 mm and a thickness of 1 to 5 mm. 前記各帯板は、帯状の繊維強化樹脂であることを特徴とする請求項１〜５のいずれかの項に記載の帯板複合ＦＲＰ格子材。The strip composite FRP lattice material according to any one of claims 1 to 5 , wherein each of the strips is a strip-like fiber reinforced resin. 前記帯状の繊維強化樹脂は、強化繊維を少なくとも一方向に配列した帯状強化繊維シートにマトリクス樹脂を含浸し、硬化して形成されることを特徴とする請求項６の帯板複合ＦＲＰ格子材。7. The strip composite FRP lattice material according to claim 6 , wherein the strip-shaped fiber reinforced resin is formed by impregnating a matrix resin into a strip-shaped reinforcing fiber sheet in which reinforcing fibers are arranged in at least one direction and curing. 前記帯状の繊維強化樹脂は、強化繊維を織成したクロス或いは強化繊維からなるマットにマトリクス樹脂を含浸し、硬化して形成されることを特徴とする請求項６の帯板複合ＦＲＰ格子材。7. The strip composite FRP lattice material according to claim 6 , wherein the belt-shaped fiber reinforced resin is formed by impregnating a matrix resin into a mat made of cloth or reinforcing fibers woven with reinforcing fibers and curing. 前記各帯板は、繊維目付１００〜１０００ｇ／ｍ2、樹脂含浸量が３０〜７０ｗｔ％、厚さが１〜５ｍｍであることを特徴とする請求項７又は８の帯板複合ＦＲＰ格子材。Each strip is fibrous basis weight 100~1000g / m 2, 30~70wt% resin impregnation amount, the strip composite FRP grating material according to claim 7 or 8 thickness, characterized in that a 1 to 5 mm. 前記強化繊維は、炭素繊維、ガラス繊維、セラミックス繊維を含む無機繊維；ボロン、チタン、スチールなどの金属繊維；アラミド、ポリエステル、ポリエチレン、ナイロン、ＰＢО、高強度ポリプロピレンなどの有機繊維；などから選択されるいずれかの繊維であるか、或いは、前記繊維を複数種混入したハイブリッドタイプとされることを特徴とする請求項７、８又は９の帯板複合ＦＲＰ格子材。The reinforcing fibers are selected from inorganic fibers including carbon fibers, glass fibers, and ceramic fibers; metal fibers such as boron, titanium, and steel; organic fibers such as aramid, polyester, polyethylene, nylon, PBO, and high-strength polypropylene; The strip composite FRP lattice material according to claim 7, 8 or 9 , wherein the fiber plate is a hybrid type in which a plurality of types of fibers are mixed. 前記マトリクス樹脂は、ビニルエステル樹脂、不飽和ポリエステル樹脂、ポリアミド樹脂、常温硬化型エポキシ樹脂、熱硬化型エポキシ樹脂、ポリカーボネート樹脂、又は、ＭＭＡなどのラジカル反応系樹脂を少なくとも一種以上含むことを特徴とする請求項７〜１０のいずれかの項に記載の帯板複合ＦＲＰ格子材。The matrix resin includes at least one radical reaction resin such as vinyl ester resin, unsaturated polyester resin, polyamide resin, room temperature curable epoxy resin, thermosetting epoxy resin, polycarbonate resin, or MMA. The strip composite FRP lattice material according to any one of claims 7 to 10 . 請求項１〜１１のいずれかの項に記載の前記帯板複合ＦＲＰ格子材の、少なくとも前記帯板部分を、接着樹脂により、コンクリート構造物に張り付けることを特徴とするコンクリート補強方法。Said strip composite FRP grating material according to any one of claims 1 to 11, at least the strip portions, by an adhesive resin, reinforced concrete wherein the pasting the concrete structure. 前記帯板複合ＦＲＰ格子材の前記帯板部分を利用してコンクリート構造物にアンカーどめされることを特徴とする請求項１２のコンクリート補強方法。The concrete reinforcing method according to claim 12 , wherein the band plate portion of the band plate composite FRP lattice material is anchored to a concrete structure. 複数の前記帯板複合ＦＲＰ格子材は、互いに隣り合った前記帯板複合ＦＲＰ格子材の帯板を互いに重ね合わせ、この重ね合わせた部分を貼り合わせて、コンクリート構造物にアンカーどめし、複数の前記帯板複合ＦＲＰ格子材を互いに接続することを特徴とする請求項１２又は１３のコンクリート補強方法。A plurality of the strip composite FRP lattice members adjacent to each other are overlapped with each other, and the overlapped portions are bonded together to be anchored to the concrete structure. The concrete reinforcing method according to claim 12 or 13 , wherein the strip composite FRP lattice members are connected to each other. 前記帯板複合ＦＲＰ格子材をコンクリート構造物に施工後に、必要に応じて更に、前記所定の帯板の上に帯状の繊維強化樹脂部材を、貼付することを特徴とする請求項１２、１３又は１４のコンクリート補強方法。Said strip composite FRP grating material after construction in a concrete structure, further optionally, a strip-shaped fiber-reinforced resin member on the predetermined strip of claim 12, 13 or, characterized in that affixed 14 concrete reinforcement methods.
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