JPH047444A - Method for fixing frp tendon - Google Patents
Method for fixing frp tendonInfo
- Publication number
- JPH047444A JPH047444A JP10777690A JP10777690A JPH047444A JP H047444 A JPH047444 A JP H047444A JP 10777690 A JP10777690 A JP 10777690A JP 10777690 A JP10777690 A JP 10777690A JP H047444 A JPH047444 A JP H047444A
- Authority
- JP
- Japan
- Prior art keywords
- tendons
- frp
- fixing
- tension
- grout
- 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.)
- Pending
Links
- 210000002435 tendon Anatomy 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 44
- 239000004567 concrete Substances 0.000 claims abstract description 17
- 239000011440 grout Substances 0.000 claims abstract description 16
- 230000003014 reinforcing effect Effects 0.000 abstract description 8
- 230000000994 depressogenic effect Effects 0.000 abstract 6
- 230000002787 reinforcement Effects 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 239000004760 aramid Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 229920003235 aromatic polyamide Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はFRP (繊維強化合成樹脂製)緊張材にポ
ストテンションを導入してコンクリート材を補強する際
の緊張材端部の定着方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for fixing the ends of FRP (fiber-reinforced synthetic resin) tendons when reinforcing concrete material by introducing post-tension into the tendons.
芳香族ポリアミド繊維(アラミド繊維)、炭素繊維ある
いはガラス繊維等を強化材とし、エポキシ樹脂、不飽和
ポリエステル樹脂等を母材としたFRP材は引張強度お
よび引張弾性率が高く、かつ腐食環境に強く、耐久性が
優れているので、コンクリート材の補強材、就中テンシ
ョンを導入した緊張材としての利用が注目されている。FRP materials made of aromatic polyamide fibers (aramid fibers), carbon fibers, glass fibers, etc. as reinforcement materials and epoxy resins, unsaturated polyester resins, etc. as base materials have high tensile strength and tensile modulus, and are resistant to corrosive environments. Due to its excellent durability, it is attracting attention for its use as a reinforcing material for concrete, especially as a tension material.
ところが、FRPロッド等の緊張材を用いるためにはそ
の端を固定しなければならないが、鋼材のように定着具
を螺着等の手段で取付けることはできない。このために
従来は例えば、截頭円錐形の空間を有する筒形の定着具
内に挿入した2つ割の楔形コーン間でFRP緊張材を挟
み把持して定着具を取付けていた。あるいは、筒形の定
着具内にFRP緊張材を挿入し、定着具内に合成樹脂等
を充填して固着し、定着具を取付けていた。しかし、楔
形コーン間で挟着把持する手段は緊張材強度に対し効率
が低く、合成樹脂で固着する手段は長期的にみて、信頼
性が乏しかった。However, in order to use tension materials such as FRP rods, the ends must be fixed, but unlike steel materials, fixing devices cannot be attached by means such as screwing. For this purpose, conventionally, for example, the fixing tool was attached by sandwiching and gripping the FRP tension material between two wedge-shaped cones inserted into a cylindrical fixing tool having a truncated cone-shaped space. Alternatively, the FRP tension material is inserted into a cylindrical fixing device, and the fixing device is filled with a synthetic resin or the like and fixed, thereby attaching the fixing device. However, the means of clamping and gripping between wedge-shaped cones has a low efficiency with respect to the strength of the tendon, and the means of fixing with synthetic resin has poor reliability in the long term.
この発明は上記問題点に着目しなされたものであり、そ
の要旨はFRP緊張材にポストテンションを導入して補
強すべきコンクリート材のFRP緊張材端部位置に予め
外面に開口する。凹陥部を設け、コンクリート材内を貫
通し、一端部をコンクリート材に固定したFRP緊張材
の他端部を前記凹陥部から引出しテンションを導入した
後、その凹陥部内にグラウトを充填し定着することを特
徴とするFRP緊張材の定着方法にある。This invention has been made with attention to the above-mentioned problems, and the gist thereof is to introduce post-tension into the FRP tendon and to open it in advance on the outside at the end position of the FRP tendon of the concrete material to be reinforced. A recess is provided, the other end of the FRP tension material is penetrated through the concrete material and one end is fixed to the concrete material, and the other end is pulled out from the recess to introduce tension, and then the grout is filled and fixed in the recess. A method for fixing FRP tension material is provided.
第1図はFRP緊張材にポストテンションを導入して補
強し、梁を構成すべきコンクリート材1であり、予め、
長さ方向に沿い緊張材を挿通ずるシース2が埋設してあ
り、その両端部にシース2に連通し、外面に開口した先
細筒形の凹陥部3,3が穿設しである。Figure 1 shows concrete material 1 that is to be reinforced by introducing post-tension into FRP tension material to form a beam.
A sheath 2 through which the tendon is inserted in the longitudinal direction is embedded, and tapered cylindrical recesses 3, 3 communicating with the sheath 2 and open to the outside are bored at both ends thereof.
このコンクリート材1のシース2内に第2図のように、
アラミド繊維を強化材としエポキシ樹脂を母材とするF
RPロッドの緊張材4の束を挿通セットし、一方の端部
(図面右側)を固定端となし先ず固定する。すなわち、
凹陥部3内に引出しである緊張材4の周囲に補強用の鉄
筋又はFRPロンドの補強筋5を配筋した後、凹陥部3
内にグラウト6を充填し、アンカ一部7を形成し、緊張
材の一端部を固定する。Inside the sheath 2 of this concrete material 1, as shown in Fig. 2,
F with aramid fiber as reinforcement material and epoxy resin as base material
A bundle of tension material 4 of the RP rod is inserted and set, and one end (on the right side in the drawing) is used as a fixed end and is first fixed. That is,
After arranging reinforcement reinforcing bars or FRP iron reinforcing bars 5 around the tension material 4, which is a drawer, in the recessed part 3, the recessed part 3 is
It is filled with grout 6 to form an anchor portion 7 and to secure one end of the tendon.
グラウト6が硬化した後、第3図のように、緊張材4の
他端部を凹陥部3から外側に引出し、楔形コーン8,8
間で把持して定着具9を取付ける。この定着具9を介し
て緊張材4を、ジヤツキあるいは牽引装置等で引張り、
所望の力のテンションを与える。この状態で定着具9を
取付けた緊張枠10とコンクリート材lとの間に固定プ
レー)11を介挿し、緊張材4を仮固定し、凹陥部3内
の緊張材4の周囲に補強筋5を配筋した後、グラウト6
を充填し、アンカ一部7を形成する。グラウトの硬化に
より、テンションを与えた緊張材4の他端部は固定、定
着されるので、定着具9を取外し、緊張材4の余長部分
を切断する。After the grout 6 has hardened, as shown in FIG.
Attach the fixing tool 9 by gripping it between the two. The tension material 4 is pulled through this fixing device 9 with a jack or a traction device, and
Give the desired force tension. In this state, a fixing plate 11 is inserted between the tensioning frame 10 to which the fixing device 9 is attached and the concrete material l, the tensioning material 4 is temporarily fixed, and reinforcing bars 5 are placed around the tensioning material 4 in the concave portion 3. After placing reinforcement, grout 6
is filled to form the anchor part 7. As the grout hardens, the other end of the tensioned tension material 4 is fixed and fixed, so the fixing tool 9 is removed and the excess length of the tension material 4 is cut.
最後に、シース2内にもグラウト6を注入する。このグ
ラウトはシース2内の緊張材4の保護に有効であるが必
ずしも必要としない。Finally, grout 6 is also injected into the sheath 2. Although this grout is effective in protecting the tendons 4 within the sheath 2, it is not necessary.
上記実施例では、凹陥部3内に鉄筋又はFRPロッドの
補強筋5を配しグラウト6の固結力を高め、アンカ一部
強度の向上を図ったが、このほか、例えば、第5図のよ
うに、凹陥部3内に嵌挿できる形状をなし、シース2と
連通する透孔12を有する鋼製のケーシング13を用い
、グラウト6を充填してアンカ一部7を形成してもよい
。In the above embodiment, reinforcing bars 5 such as reinforcing bars or FRP rods are placed inside the concave portion 3 to increase the consolidation force of the grout 6 and improve the strength of a portion of the anchor. The anchor portion 7 may be formed by filling the grout 6 with a steel casing 13 having a shape that can be fitted into the recess 3 and having a through hole 12 communicating with the sheath 2.
この発明でいうFRP緊張材は炭素繊維、芳香族ポリア
ミド繊維、あるいはガラス繊維等を強化材とするFRP
材であり、その形状は丸棒、異形棒、あるいは帯状、ス
トランド状等であり、−本あるいは複数本引揃え用いる
。The FRP tension material referred to in this invention is FRP reinforced with carbon fiber, aromatic polyamide fiber, glass fiber, etc.
The shape is a round bar, irregularly shaped bar, band shape, strand shape, etc., and one or more pieces are used in a row.
この発明でいうグラウトは、セメントペースト、セメン
トモルタル、合成樹脂ペースト(例えばエポキシ樹脂系
ペースト状組成物)、合成樹脂混入レジンモルタル等で
あり、F R,P緊張材の種類、形状あるいはコンクリ
ート材の使用目的等に応じ選択する。The grout referred to in this invention includes cement paste, cement mortar, synthetic resin paste (e.g., epoxy resin paste composition), resin mortar mixed with synthetic resin, etc., and depends on the type and shape of F R and P tendons, or the type of concrete material. Select according to the purpose of use, etc.
凹陥部の深さ、容積は緊張材に作用するテンシコン、あ
るいは緊張材の太さ、本数等の条件によりかわる。深さ
に比例して緊張材の定着強度を高めることができる。The depth and volume of the recess vary depending on conditions such as the tensile force acting on the tension material, the thickness of the tension material, and the number of tension materials. The anchoring strength of the tension material can be increased in proportion to the depth.
このFRP緊張材の定着方法はポストテンションを与え
た緊張材の端部を、コンクリート材に穿設した凹陥部に
グラウトを充填しアンカー部を形成する簡易な手段で定
着することができる。凹陥部の深さ、容積、あるいはグ
ラウトの種類、組成等を選定し用いることにより、十分
な定着強度と長期耐用できる耐久性とを付与することが
できる。This method of fixing the FRP tendon can fix the end of the post-tensioned tendon by a simple method of filling a recess drilled in the concrete material with grout to form an anchor part. By selecting and using the depth and volume of the recessed portion, or the type and composition of the grout, sufficient fixing strength and long-term durability can be imparted.
第1.2,3.4図はそれぞれ実施例のコンクリート材
のFRP緊張材の定着方法を工程順に示す断面図、第5
図はアンカ一部の別の態様例を示す部分断面図である。
■・・・コンクリート材、2・・・シース、3・・・凹
陥部、4・・・FRPロッドの緊張材、訃・・補強筋、
6・・・グラウト、7・・・アンカ一部、訃・・樹形コ
ーン、9・・・定着具、10・・・緊張枠、11・・・
固定プレート、12・・・透孔、13・・・ケーシング
。Figures 1.2 and 3.4 are cross-sectional views showing the method of fixing FRP tendons for concrete materials in the order of steps in the example, and Figure 5.
The figure is a partial sectional view showing another embodiment of a part of the anchor. ■... Concrete material, 2... Sheath, 3... Concave portion, 4... FRP rod tension material, butt... Reinforcement bar,
6... Grout, 7... Part of the anchor, butt... Tree-shaped cone, 9... Anchor, 10... Tension frame, 11...
Fixed plate, 12... Through hole, 13... Casing.
Claims (1)
すべきコンクリート材のFRP緊張材端部位置に予め外
面に開口する凹陥部を設け、コンクリート材内を貫通し
、一端部をコンクリート材に固定したFRP緊張材の他
端部を前記凹陥部から引出しテンションを導入した後、
その凹陥部内にグラウトを充填し定着することを特徴と
するFRP緊張材の定着方法。(1) Post-tensioning is introduced into the FRP tendon to provide a recess that opens to the outside in advance at the end position of the FRP tendon of the concrete material to be reinforced, penetrates the inside of the concrete material, and fixes one end to the concrete material. After pulling out the other end of the FRP tension material from the recess and introducing tension,
A method for fixing FRP tension material, characterized by filling and fixing grout in the recessed part.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10777690A JPH047444A (en) | 1990-04-24 | 1990-04-24 | Method for fixing frp tendon |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10777690A JPH047444A (en) | 1990-04-24 | 1990-04-24 | Method for fixing frp tendon |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH047444A true JPH047444A (en) | 1992-01-10 |
Family
ID=14467730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10777690A Pending JPH047444A (en) | 1990-04-24 | 1990-04-24 | Method for fixing frp tendon |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH047444A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06330585A (en) * | 1993-05-25 | 1994-11-29 | Unyusho Kowan Gijutsu Kenkyusho | Anchorage method for frp tendon for prestressed concrete pavement |
JPH07119301A (en) * | 1993-10-22 | 1995-05-09 | Kajima Corp | Manufacture of non-metal anchoring part |
JP2002326644A (en) * | 2001-04-27 | 2002-11-12 | Nissui Pharm Co Ltd | Cap |
-
1990
- 1990-04-24 JP JP10777690A patent/JPH047444A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06330585A (en) * | 1993-05-25 | 1994-11-29 | Unyusho Kowan Gijutsu Kenkyusho | Anchorage method for frp tendon for prestressed concrete pavement |
JPH07119301A (en) * | 1993-10-22 | 1995-05-09 | Kajima Corp | Manufacture of non-metal anchoring part |
JP2002326644A (en) * | 2001-04-27 | 2002-11-12 | Nissui Pharm Co Ltd | Cap |
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