JPH081084B2 - FRP tension material fixing method - Google Patents
FRP tension material fixing methodInfo
- Publication number
- JPH081084B2 JPH081084B2 JP28143593A JP28143593A JPH081084B2 JP H081084 B2 JPH081084 B2 JP H081084B2 JP 28143593 A JP28143593 A JP 28143593A JP 28143593 A JP28143593 A JP 28143593A JP H081084 B2 JPH081084 B2 JP H081084B2
- Authority
- JP
- Japan
- Prior art keywords
- frp
- tension
- fixing
- tension material
- concrete member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 title claims description 59
- 238000000034 method Methods 0.000 title claims description 20
- 239000004567 concrete Substances 0.000 claims description 30
- 239000000945 filler Substances 0.000 claims description 14
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 210000002435 tendon Anatomy 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ポストテンション方式
によってプレストレスを導入してコンクリート部材を補
強するＦＲＰ緊張材の定着方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing an FRP tension member which reinforces a concrete member by introducing prestress by a post tension method.
【０００２】[0002]
【従来の技術】従来のプレストレストコンクリート構造
におけるポストテンション方式では、緊張材として鋼材
をコンクリート部材内に貫通し、この鋼材をジャッキに
て所定強度まで引張って緊張し、端部を鋼製あるいはモ
ルタル製の定着具を用いてコンクリート部材端面に定着
している。2. Description of the Related Art In the conventional post-tensioning method for a prestressed concrete structure, a steel material is penetrated into a concrete member as a tension material, and this steel material is tensioned with a jack to a predetermined strength, and the end portion is made of steel or mortar. It is fixed to the end surface of the concrete member using the fixing tool.
【０００３】ところが緊張材としてＦＲＰ材を使用した
場合、現状では満足できるＦＲＰ製定着具がなく、また
上記従来の鋼製定着具を使用することは、不錆性という
利点を有するＦＲＰ緊張材を錆性の定着具にて定着する
ことになり、この利点に反することになる。この問題点
を解消するために例えば特願平４−７４４４が提案され
ている。かかる特願平４−７４４４では、図４の断面図
に示すようにコンクリート部材の両端面に外に向かって
開口する凹陥部を設け、ＦＲＰ緊張材を一束にして一端
の凹陥部から他端の凹陥部へコンクリート部材中に貫通
し、最初に一端の凹陥部においてＦＲＰ緊張材の一端を
充填材中に埋設して、充填材と一体にして定着し、次い
でＦＲＰ緊張材にテンションを導入した後、他端の凹陥
部においてＦＲＰ緊張材の他端を充填材中に埋設して、
充填材と一体にして定着するＦＲＰ緊張材の定着方法が
開示されている。However, when an FRP material is used as the tension material, there is no satisfactory FRP fixing tool at present, and the use of the above-mentioned conventional steel fixing tool makes it possible to obtain an FRP tension material having an advantage of antirust. It is fixed with a rust fixing device, which is against this advantage. To solve this problem, for example, Japanese Patent Application No. 4-7444 has been proposed. In such Japanese Patent Application No. 4-7444, as shown in the cross-sectional view of FIG. 4, recessed portions that open outward are provided on both end surfaces of the concrete member, and a bundle of FRP tension members is bundled to the other end. Of the FRP tension material is first embedded in the filling material in the depression portion at one end to be fixed integrally with the filling material, and then tension is introduced into the FRP tension material. After that, the other end of the FRP tension material is embedded in the filling material in the recessed portion at the other end,
A method of fixing an FRP tension material, which is fixed integrally with a filler, is disclosed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、一般的
に、コンクリート、セメントモルタル等の充填材と、そ
の内部に埋設されたＦＲＰ緊張材等の部材を確実に定着
させるためには、この充填材とＦＲＰ緊張材との間に充
分な付着強度を得る必要があり、さらにそのためには、
充填材とＦＲＰ緊張材表面との間に充分な接触面積が必
要になる。しかるに、特願平４−７４４４の定着方法で
は、一束に纏まっているか、あるいは一本に形成されて
いるＦＲＰ緊張材の両端部を充填材中に埋設するため、
ＦＲＰ緊張材と充填材との間に充分な接触面積が確保で
きない。したがって、充分な付着強度は確保できず、Ｆ
ＲＰ緊張材を確実に定着することができないという問題
点がある。However, in general, in order to securely fix the filler such as concrete or cement mortar and the member such as the FRP tension member embedded inside the filler, this filler is used. It is necessary to obtain sufficient adhesive strength with the FRP tension material, and for that purpose,
A sufficient contact area is required between the filler and the surface of the FRP tendon. However, in the fixing method of Japanese Patent Application No. 4-7444, since both ends of the FRP tension material that are bundled or formed into one bundle are embedded in the filler,
A sufficient contact area cannot be secured between the FRP tension material and the filler. Therefore, sufficient adhesion strength cannot be secured, and F
There is a problem that the RP tension material cannot be firmly fixed.
【０００５】本発明は上記問題点に着目してなされたも
のであり、その目的は、定着具等を使用せず、ＦＲＰ緊
張材と充填材との間の付着力を利用することによって、
ＦＲＰ緊張材をコンクリート部材端部に強固に定着でき
るＦＲＰ緊張材の定着方法を提供することにある。The present invention has been made in view of the above problems, and an object thereof is to utilize the adhesive force between the FRP tension material and the filler without using a fixing tool or the like.
An object of the present invention is to provide a fixing method for an FRP tension material that can firmly fix the FRP tension material to the end portion of the concrete member.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記課題を解
決するためになされたものであり、その要旨は、ポスト
テンション方式によってプレストレスを導入してコンク
リート部材を補強するＦＲＰ緊張材の定着方法であっ
て、前記コンクリート部材の両端面へと貫通する孔を有
する凹陥部を前記コンクリート部材の両端部側面に設
け、前記コンクリート部材内を貫通したＦＲＰ緊張材を
前記両凹陥部で分岐し、前記孔を貫通してテンションを
導入した後、前記凹陥部内に充填材を注入して前記ＦＲ
Ｐ緊張材を前記コンクリート部材に定着することを特徴
とするＦＲＰ緊張材の定着方法にある。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its gist is to fix an FRP tension member that reinforces a concrete member by introducing prestress by a post tension method. A method, wherein a concave portion having a hole penetrating to both end surfaces of the concrete member is provided on both end side surfaces of the concrete member, and an FRP tension member penetrating the inside of the concrete member is branched at the both concave portions, After the tension is introduced through the hole, a filling material is injected into the recessed portion to form the FR.
A method for fixing an FRP tension material is characterized in that a P tension material is fixed to the concrete member.
【０００７】[0007]
【作用】本発明のＦＲＰ緊張材の定着方法では、コンク
リート部材の両端側面に凹陥部を設け、一束のＦＲＰ緊
張材を前記コンクリート部材内に貫通して凹陥部で複数
の束に分岐し、ＦＲＰ緊張材を凹陥部に注入された充填
材と一体に埋設して定着する。ここで、ＦＲＰ緊張材は
凹陥部で分岐しており、充填材との間に充分な接触面積
が確保できるため付着強度も高まり、ＦＲＰ緊張材のコ
ンクリート部材への強固な定着が可能になる。In the method for fixing the FRP tension material of the present invention, concave portions are provided on both side surfaces of the concrete member, and one bundle of FRP tension material is penetrated into the concrete member to be branched into a plurality of bundles at the concave portions. The FRP tension material is embedded and fixed integrally with the filler material injected into the recess. Here, since the FRP tension material is branched at the recessed portion and a sufficient contact area can be secured with the filling material, the adhesion strength is increased and the FRP tension material can be firmly fixed to the concrete member.
【０００８】[0008]
【実施例】以下に、添付図面を参照しながら実施例につ
いて説明する。EXAMPLES Examples will be described below with reference to the accompanying drawings.
【０００９】図１乃至図３は本発明のＦＲＰ緊張材の定
着方法をコンクリート製主桁に適用した実施例であり、
図１はポストテンション方式によりプレストレスを導入
して補強すべきコンクリート製主桁材１の斜視図を示し
ている。図１のコンクリート製主桁材１は、長手方向に
ＦＲＰ緊張材を挿通するために予め一本のシース管６が
埋設されており、このシース管６に連通するように両端
部の上フランジ表面に長方体形状の凹陥部２が予め形成
されている。この凹陥部２は、コンクリート製主桁材１
の中央部３、両側部４、端部５及び下端部７（図２参
照）によって囲まれて立方体形状に形成されており、さ
らに端部５にはシース管６から分岐して延長するＦＲＰ
緊張材を挿通するために、シース管８が凹陥部２から端
面１４へと貫通するように予め埋設されている。また、
端面１４には、固定金物を仮固定するために底面の傾斜
した切欠き部１５が、シース管８と連通する位置に形成
されている。ここで、シース管６は一束に纏まったＦＲ
Ｐ緊張材が挿通可能な径とし、一方、シース管８は分岐
したＦＲＰ緊張材が挿通可能な径とする。したがって、
シース管８は、シース管６よりも大径のシース管を用い
る。なお、端部５のシース管８及びシース管６の本数
は、上記の一本ずつに限定されず、所要プレストレス量
に応じて主桁材１に配設されるＦＲＰ緊張材の束数にし
たがい、適宜定めることが可能であり、またこれらのシ
ース管の配列は、縦列、横列、縦横複数列、あるいは整
列させずに分散させて埋設してもよく、さらに、凹陥部
２の形状及び配設位置も、シース管６から分岐して延長
する複数のＦＲＰ緊張材が埋設可能であれば、上記長方
体形状及び上フランジ表面の配設位置に限定されない。FIGS. 1 to 3 show an embodiment in which the method for fixing FRP tendons of the present invention is applied to a concrete main girder.
FIG. 1 shows a perspective view of a concrete main girder material 1 to be reinforced by introducing prestress by a post tension method. In the concrete main girder material 1 of FIG. 1, one sheath tube 6 is embedded in advance in order to insert the FRP tension material in the longitudinal direction, and the upper flange surface of both ends is communicated with this sheath tube 6. The rectangular recess 2 is formed in advance. This recess 2 is the main girder material 1 made of concrete.
Is formed into a cubic shape by being surrounded by the central portion 3, both side portions 4, the end portion 5 and the lower end portion 7 (see FIG. 2), and the end portion 5 further extends by branching from the sheath tube 6.
In order to insert the tension member, the sheath tube 8 is embedded in advance so as to penetrate from the concave portion 2 to the end surface 14. Also,
On the end surface 14, a cutout portion 15 having an inclined bottom surface is formed at a position communicating with the sheath tube 8 in order to temporarily fix the fixed hardware. Here, the sheath tube 6 is a bundle of FRs.
The diameter of the P-tension material can be inserted, while the diameter of the sheath tube 8 is such that the branched FRP-tension material can be inserted. Therefore,
As the sheath tube 8, a sheath tube having a larger diameter than that of the sheath tube 6 is used. The number of the sheath pipes 8 and the sheath pipes 6 at the end portion 5 is not limited to the above-mentioned ones, but may be the number of bundles of the FRP tension members arranged in the main girder member 1 according to the required prestress amount. Therefore, the sheath tubes can be appropriately determined, and the arrangement of these sheath tubes may be arranged in columns, rows, a plurality of rows and columns, or may be embedded without being aligned, and further, the shape and arrangement of the recesses 2 may be set. The installation position is not limited to the above rectangular parallelepiped shape and the installation position of the upper flange surface as long as a plurality of FRP tension members branching from the sheath tube 6 and extending can be embedded.
【００１０】次に、図２（ａ）〜（ｂ）及び図３（ａ）
〜（ｄ）に示す図１のＡ−Ａ断面図にしたがって本発明
のＦＲＰ緊張材の定着方法を工程順に説明する。最初
に、図３（ａ）に示すコンクリート製主桁材１（図１と
同一）を形成した後、図３（ｂ）に示すように、コンク
リート製主桁材１のシース管６内に複数のストランドか
らなる一束のＦＲＰ緊張材１３を貫通し、両凹陥部２で
それぞれＦＲＰストランド一本々々に分岐したＦＲＰ緊
張材の全てをスパイラル筋１６に挿通し、さらにこのＦ
ＲＰ緊張材１３をそれぞれ端部５のシース管８に挿通
し、切欠き部１５から引き出す。ここで、ＦＲＰ緊張材
とは、炭素繊維、アラミド繊維またはガラス繊維等を強
化材とする繊維強化プラスチック材料によるストランド
状の緊張材である。なお、両凹陥部２では上記スパイラ
ル筋１６を用いないで、一本々々に分岐したＦＲＰスト
ランドのみを配設しても良い。また、両凹陥部２で複数
のＦＲＰストランドに分岐したＦＲＰ緊張材１３は、以
下、図示の便宜のために、二本のＦＲＰストランド１３
ａ，１３ｂにより図示して説明する。Next, FIGS. 2 (a)-(b) and FIG. 3 (a)
The method for fixing the FRP tendon material of the present invention will be described in the order of steps with reference to the sectional view taken along line AA of FIG. First, after forming the concrete main girder material 1 (same as in FIG. 1) shown in FIG. 3 (a), as shown in FIG. All of the FRP tension material that has penetrated through a bundle of FRP tension material 13 composed of strands of FRP and branched into two FRP strands at the biconcave recesses 2 respectively.
Each of the RP tension members 13 is inserted into the sheath tube 8 of the end portion 5 and pulled out from the cutout portion 15. Here, the FRP tension material is a strand-shaped tension material made of a fiber reinforced plastic material having carbon fiber, aramid fiber, glass fiber or the like as a reinforcement material. In the biconcave portion 2, the spiral streaks 16 may not be used, and only the FRP strands branched one by one may be arranged. In addition, the FRP tension material 13 branched into a plurality of FRP strands at the biconcave portion 2 will be described below with two FRP strands 13 for convenience of illustration.
A and 13b are shown and demonstrated.
【００１１】次に、図３（ｃ）、図２（ａ）及び（ｂ）
に示すように、両端面１４から引き出されたＦＲＰスト
ランド１３ａ，１３ｂの両方の端を定着コーン１１の孔
に挿通し、この孔内でＦＲＰストランド１３ａ，１３ｂ
を挾むように楔１２を取付け、さらに、この定着コーン
１１においてＦＲＰストランド１３ａ，１３ｂの両端を
ジャッキ（図示せず）で引張るとともに、楔１２を定着
コーン１１の孔に押し入れてＦＲＰストランド１３ａ，
１３ｂを定着する。そして、両凹陥部２、シース管６及
びシース管８内にコンクリート、セメントモルタル、樹
脂モルタル等の充填材１０を注入する。なお、分岐した
ＦＲＰストランド一本々々の間隔が十分維持できるよう
に、前記定着コーン１１の孔は十分大きく形成し、また
前記楔１２の厚さも十分確保する。Next, FIGS. 3 (c), 2 (a) and 2 (b)
As shown in FIG. 2, both ends of the FRP strands 13a and 13b pulled out from both end surfaces 14 are inserted into the holes of the fixing cone 11, and the FRP strands 13a and 13b are inserted in the holes.
The wedge 12 is attached so as to sandwich the FRP strands 13a and 13b in the fixing cone 11, and both ends of the FRP strands 13a and 13b are pulled by jacks (not shown).
Fix 13b. Then, a filler 10 such as concrete, cement mortar, resin mortar or the like is injected into the biconcave portion 2, the sheath tube 6 and the sheath tube 8. In addition, the holes of the fixing cone 11 are formed sufficiently large and the thickness of the wedge 12 is sufficiently secured so that the distance between the branched FRP strands can be sufficiently maintained.
【００１２】両凹陥部２の充填材が硬化した後にジャッ
キを取外すとともに、定着コーン１１及び楔１２等の固
定金具も取外し撤去し、その後、切欠き部１５に充填材
１０を注入する（図３（ｄ）参照）。After the filling material of the biconcave portion 2 is hardened, the jack is removed, and the fixing fittings such as the fixing cone 11 and the wedge 12 are also removed and then the filling material 10 is injected into the cutout portion 15 (FIG. 3). (See (d)).
【００１３】なお、上記実施例ではシース管６、シース
管８及び切欠き部１５に充填材を注入したが、特に充填
材を注入しなくても良い。Although the filler is injected into the sheath tube 6, the sheath tube 8 and the notch 15 in the above embodiment, it is not necessary to inject the filler.
【００１４】[0014]
【発明の効果】本発明のＦＲＰ緊張材の定着方法は、Ｆ
ＲＰ緊張材がコンクリート部材の端部の凹陥部において
複数に分岐しているため、一束に纏まっている時より
も、この凹陥部に注入された充填材との付着力が向上
し、したがって、このＦＲＰ緊張材の端部を定着金具等
で固定しなくても充分強固に定着することが可能となっ
た。The method of fixing the FRP tendon material of the present invention is
Since the RP tension material is branched into a plurality of recesses at the end of the concrete member, the adhesive force with the filler injected into the recesses is improved as compared with the case where the RP tension members are bundled together, and therefore, It became possible to firmly fix the FRP tension material without fixing the end portion with a fixing metal fitting or the like.
【図１】図１は本発明のＦＲＰ緊張材の定着方法を適用
するコンクリート製主桁材の斜視図を示している。FIG. 1 is a perspective view of a concrete main girder material to which the method for fixing an FRP tendon material of the present invention is applied.
【図２】図２（ａ）は、図３（ｃ）の一部拡大図であ
り、さらに図２（ｂ）は図２（ａ）の一部拡大図であ
る。2 (a) is a partially enlarged view of FIG. 3 (c), and FIG. 2 (b) is a partially enlarged view of FIG. 2 (a).
【図３】図３（ａ）〜（ｄ）は、図１のＡ−Ａ断面図で
あり、本発明の工程順序の説明図である。3A to 3D are cross-sectional views taken along the line AA of FIG. 1 and are explanatory views of a process sequence of the present invention.
【図４】図４は、従来例を示す断面図である。FIG. 4 is a cross-sectional view showing a conventional example.
１ コンクリート製主桁材（コンクリート部材） ２ 凹陥部 ８ シース管（両端面へと貫通する孔） １０ 充填材 １３ ＦＲＰ緊張材 １３ａ，１３ｂ ＦＲＰストランド １４ 両端面（コンクリート部材の両端面） DESCRIPTION OF SYMBOLS 1 Concrete main girder material (concrete member) 2 Recessed part 8 Sheath pipe (hole penetrating to both end surfaces) 10 Filling material 13 FRP tension material 13a, 13b FRP strand 14 Both end surfaces (both end surfaces of concrete member)
Claims (1)
レスを導入してコンクリート部材を補強するＦＲＰ緊張
材の定着方法であって、 前記コンクリート部材の両端面へと貫通する孔を有する
凹陥部を前記コンクリート部材の両端部側面に設け、前
記コンクリート部材内を貫通したＦＲＰ緊張材を前記両
凹陥部で分岐し、前記孔を貫通してテンションを導入し
た後、前記凹陥部内に充填材を注入して前記ＦＲＰ緊張
材を前記コンクリート部材に定着することを特徴とする
ＦＲＰ緊張材の定着方法。1. A method for fixing an FRP tension member, which reinforces a concrete member by introducing prestress by a post-tension method, comprising: forming a concave portion having a hole penetrating to both end faces of the concrete member in the concrete member. FRP tension material provided on both side surfaces and penetrating the inside of the concrete member is branched at the biconcave recesses, a tension is introduced through the holes, and then a filler is injected into the concavities to perform the FRP tension. A method for fixing FRP tension material, which comprises fixing the material to the concrete member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28143593A JPH081084B2 (en) | 1993-11-10 | 1993-11-10 | FRP tension material fixing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28143593A JPH081084B2 (en) | 1993-11-10 | 1993-11-10 | FRP tension material fixing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07133648A JPH07133648A (en) | 1995-05-23 |
| JPH081084B2 true JPH081084B2 (en) | 1996-01-10 |
Family
ID=17639133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28143593A Expired - Lifetime JPH081084B2 (en) | 1993-11-10 | 1993-11-10 | FRP tension material fixing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH081084B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631836A (en) * | 2014-12-08 | 2015-05-20 | 永升建设集团有限公司 | Post-tensioning-method retard-bonded pre-stress cast-in-place concrete construction method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102032160B1 (en) * | 2019-03-13 | 2019-10-15 | (주)삼현피에프 | Prestressed concrete girder for bridge and method thereof |
| JP7186669B2 (en) * | 2019-06-13 | 2022-12-09 | 三井住友建設株式会社 | Concrete floor slab and method for repairing concrete floor slab |
| JP2024059303A (en) * | 2022-10-18 | 2024-05-01 | 三井住友建設株式会社 | Method for fastening FRP tendons and structure for fastening FRP tendons |
| JP2024059295A (en) * | 2022-10-18 | 2024-05-01 | 三井住友建設株式会社 | Method for fastening FRP tendons and structure for fastening FRP tendons |
-
1993
- 1993-11-10 JP JP28143593A patent/JPH081084B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631836A (en) * | 2014-12-08 | 2015-05-20 | 永升建设集团有限公司 | Post-tensioning-method retard-bonded pre-stress cast-in-place concrete construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07133648A (en) | 1995-05-23 |
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