JPH03271466A - Method of introducing post-tension for frp tension member - Google Patents
Method of introducing post-tension for frp tension memberInfo
- Publication number
- JPH03271466A JPH03271466A JP7286590A JP7286590A JPH03271466A JP H03271466 A JPH03271466 A JP H03271466A JP 7286590 A JP7286590 A JP 7286590A JP 7286590 A JP7286590 A JP 7286590A JP H03271466 A JPH03271466 A JP H03271466A
- Authority
- JP
- Japan
- Prior art keywords
- tension
- sheath
- concrete
- frp
- unit
- 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
- 238000000034 method Methods 0.000 title claims description 8
- 239000004567 concrete Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims description 22
- 210000002435 tendon Anatomy 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 238000009415 formwork Methods 0.000 description 11
- 239000004760 aramid Substances 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000835 fiber Substances 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
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
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）製の緊張材を
埋設したコンクリート構造物あるいは部材にポストテン
ションを導入する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for introducing post-tension into a concrete structure or member in which tendons made of FRP (fiber-reinforced synthetic resin) are embedded.
Ｃ従来技術〕
芳香族ポリアミド繊維（アラミド繊維）や炭素繊維等を
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材は強度および引張弾性率が高く、コ
ンクリートにプレストレスを与える緊張材となし多く用
いられている。C Conventional technology] FRP materials made of aromatic polyamide fibers (aramid fibers), carbon fibers, etc. as reinforcement materials and epoxy resins, unsaturated polyester resins, etc. as base materials have high strength and tensile modulus, and give prestress to concrete. It is often used as tension material.
従来のこれらＦＲＰ材を用いたプレストレストコンクリ
ート構造物あるいは部材はすべてプレテンション導入法
によりつくられ、ポストテンション導入法はなかった。All conventional prestressed concrete structures or members using these FRP materials were created using the pre-tensioning method, and there was no post-tensioning method.
プレテンションを導入するには、例えば第５図のように
型枠１を囲み、対向する２側辺にジヤツキ２，２を有す
る方形のベツド枠３を製作し、他の対向する２辺間に、
型枠１内を挿通してＦＲＰ緊張材４を配し、その両端を
定着具５で固定してベツド３の辺に定着し、ジヤツキ２
を伸ばし、ヘッド枠３を反力点として緊張材を引張り、
型枠内のコンクリートが硬化した後、脱型し、緊張材端
部を切断することによりコンクリート部材にプレストレ
スを導入していた。To introduce pretension, for example, as shown in Fig. 5, a rectangular bed frame 3 is manufactured that surrounds the formwork 1 and has jacks 2, 2 on two opposing sides, and between the other two opposing sides. ,
The FRP tension material 4 is inserted through the formwork 1, fixed at both ends with the fixing device 5, fixed to the side of the bed 3, and then fixed to the side of the bed 3.
, stretch the tension material using the head frame 3 as a reaction force point,
After the concrete in the form has hardened, it is removed from the form and the ends of the tendons are cut to introduce prestress into the concrete member.
また、プレテンション導入用には第６図に示す定着具５
が一般に用いられている。すなわち截頭円錐形を中心軸
に沿い２つ割りした形状の２つの喫６，６間で、板状な
どの形状のＦＲＰロッドの緊張材４を挾み、この模を一
端が大径、他端が細径をなし、内部が截頭円錐形の空間
をなした筒体７に押入れ、楔６，６間で緊張材４を挟着
固定する構造であった。In addition, for introducing pretension, a fixing tool 5 shown in Fig. 6 is used.
is commonly used. In other words, a tension member 4 of an FRP rod having a plate shape or the like is sandwiched between two ends 6, 6, each having a truncated conical shape divided into two along the central axis, and the tension material 4 of an FRP rod having a shape such as a plate is sandwiched between the two ends. The tension member 4 was inserted into a cylinder 7 whose end had a small diameter and a truncated cone-shaped space inside, and the tension material 4 was clamped and fixed between wedges 6, 6.
従来のプレテンション導入の方法は上記のようであるの
で、■必ず打設するコンクリート部材より大きい緊張用
の銅製ベツド枠が必要となり、大形部材を製作するには
不適である。■場所打ちコンクリート構造物、例えば橋
梁の張出し架設工法などには適用できなかった。■常に
部材に配置した緊張材総本数分の反力に見合うジヤツキ
容量を必要とする等の問題点があった。Since the conventional method of introducing pretension is as described above, (1) it necessarily requires a copper bed frame for tensioning that is larger than the concrete member to be cast, making it unsuitable for manufacturing large members. ■It could not be applied to cast-in-place concrete structures, such as bridge overhang construction methods. ■There were problems such as always requiring a jacking capacity corresponding to the reaction force of the total number of tension members arranged in the member.
〔課題を解決するための手段〕
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、コンクリートの打設に先だち、ＦＲＰ緊張材
を配筋すべき位置に沿いシース、およびその端部位置に
シース内に連通し打設コンクリート外面に開口する定着
具嵌込空間を有するポストテンション用アンカー体を配
置し、コンクリートを打設し硬化した後に、シースおよ
びアンカー体内に嵌込んだ定着具を挿通し配したＦＲＰ
緊張材端部を、アンカー体外側面を反力点となしジヤツ
キで引張り、アンカー体内定着具の楔で挟着固定してポ
ストテンションを導入することを特徴とするＦＲＰ緊張
材のポストテンション導入方法にある。[Means for Solving the Problems] This invention has been made by focusing on the above-mentioned problems, and its gist is that, prior to pouring concrete, a sheath is installed along the position where FRP tension material is to be placed, and A post-tensioning anchor body is placed at the end position and has an anchoring space that communicates with the inside of the sheath and opens on the outer surface of the poured concrete. FRP with fittings inserted through it
A method for introducing post-tension into an FRP tension material, characterized in that the end of the tension material is pulled with a jack using the outer surface of the anchor body as a reaction force point, and the post-tension is introduced by clamping and fixing it with a wedge of an anchor body fixing device. .
以下、ＦＲＰ緊張材としてアラミド繊維を強化材とした
板状ＦＲＰロッドを用いた実施例を図面を用い説明する
。先ずコンクリートの打設に先立ち、第１図のごとく型
枠８内のＦＲＰ９張材を配筋すべき位置に沿って、第２
図に示す緊張材を挿通ずる扁平形のシース９を配し、そ
の端部に型枠８内面に接しポストテンション用のアンカ
ー体１０を配置する。このアンカー体１０は鋼製で、内
部に従来のプレテンション導入用の定着具５の筒体７（
第６図参照）を嵌込みできる大径部と細径部とからなり
、両端が開口した嵌込空間１１を備え、大径部外縁部に
は定着フランジ１２が張出している。シース９とアンカ
ー体１０細径部端との間は第３図に示す接続シース １
３で連結して連通しており、アンカー体１０は大径部外
縁の定着フランジ１２面を型枠８内面に接し配置される
。なお１４はグラウト排出口である。Hereinafter, an example in which a plate-shaped FRP rod reinforced with aramid fibers is used as the FRP tension material will be described with reference to the drawings. First, before pouring concrete, as shown in Figure 1, the FRP9 tension material inside the formwork 8 is placed along the position where it should be reinforced.
A flat sheath 9 through which the tension material shown in the figure is inserted is arranged, and an anchor body 10 for post-tensioning is arranged at the end thereof in contact with the inner surface of the formwork 8. This anchor body 10 is made of steel, and has a cylindrical body 7 (
It consists of a large-diameter part and a small-diameter part into which a large-diameter part (see FIG. 6) can be fitted, and has a fitting space 11 that is open at both ends, and a fixing flange 12 protrudes from the outer edge of the large-diameter part. Between the sheath 9 and the narrow diameter end of the anchor body 10 is a connecting sheath 1 shown in FIG.
3 to communicate with each other, and the anchor body 10 is arranged so that the surface of the fixing flange 12 on the outer edge of the large diameter portion is in contact with the inner surface of the formwork 8. Note that 14 is a grout outlet.
この様に型枠内にシースおよびアンカー体を配置し、ア
ンカー体の周囲に定着部の補強筋１５を配筋した後、コ
ンクリート１６を打設する。コンクリート１６が硬化し
た後、型枠８を解体撤去する。コンクリ−ｚ６ｍにはア
ンカー体１０の定着フランジ１２が一平面をなし位置し
、嵌込空間１１が開口する。この嵌込空間１１内に定着
具の筒体７を細径部を先にして嵌込み、ＦＲＰ緊張材４
を嵌込空間１１がら、シース９内に挿通し、その端部を
定着具筒体７内において喫６，６間で挟み、先端をコン
クリート１６外に引出しておく。After arranging the sheath and the anchor body in the formwork in this way, and arranging reinforcing bars 15 for the anchoring part around the anchor body, concrete 16 is poured. After the concrete 16 has hardened, the formwork 8 is dismantled and removed. The fixing flange 12 of the anchor body 10 is located in one plane on the concrete z6m, and the fitting space 11 is opened. The cylindrical body 7 of the fixing tool is fitted into this fitting space 11 with the narrow diameter part first, and the FRP tension material 4
is inserted into the sheath 9 through the fitting space 11, its end is sandwiched between the sleeves 6, 6 in the fixing tool cylinder 7, and the tip is pulled out of the concrete 16.
コノコンクリート１６表面に位置するアンカー体定着フ
ランジ１２面に接しジヤツキ１７を配置し、引出しであ
るＦＲＰ緊張材４の端部をジヤツキ把持部１８で把持し
、加圧板Ａ、Ｂ間に油圧をかけてジヤツキを伸ばし、ア
ンカー体定着フランジ１２面を反力点として緊張材４を
所定の張力に達するまで引張る。次に加圧板Ｂに油圧を
かけて喫６．６を押すことにより緊張材４は筒体７内で
模６．６間で挟着されて定着具５に固定され、定着具５
、アンカー体１ｏを介シてコンクリート１６に定着され
、コンクリート１６にポストテンションによるプレスト
レスが導入される。A jack 17 is placed in contact with the surface of the anchor body fixing flange 12 located on the surface of the conoconcrete 16, and the end of the FRP tension material 4, which is a drawer, is gripped by the jack grip part 18, and hydraulic pressure is applied between the pressure plates A and B. Then, the tension material 4 is pulled until a predetermined tension is reached, using the surface of the anchor body fixing flange 12 as a reaction force point. Next, by applying hydraulic pressure to the pressure plate B and pushing the clamp 6.6, the tension material 4 is clamped between the clamps 6.6 in the cylinder body 7 and fixed to the fixing tool 5.
, is fixed to the concrete 16 via the anchor body 1o, and prestress by post tension is introduced into the concrete 16.
このＦＲＰ緊張材のポストテンション導入方法によると
、■プレストレスの導入にベツド枠を必要としない。■
例えば橋梁の張出し架設工法などのような通常のポスト
テンション構造に応用できる。■複数の緊張材を並列配
筋する場合でも、緊張材１本分の容量を持つジヤツキで
順次緊張するので大容量のジヤツキを必要としない。According to this method of introducing post-tensioning of FRP tendons, ■ A bed frame is not required for introducing pre-stressing. ■
For example, it can be applied to normal post-tension structures such as bridge overhang construction methods. ■Even when multiple tension members are arranged in parallel, a jack with the capacity of one tension member is used to tension them one after another, so there is no need for large capacity jacks.
第１．２，３．４図は実施例を示すものであって、第１
図はコンクリート打設時の型枠内断面図、第２．３図は
シースおよび接続シースの斜視図、第４図は緊張材を引
張り、ポストテンション導入時の断面図、第５図（ａ）
、 （ｂ）は従来のプレテンション導入方法による型枠
、ヘッド枠の平面図および側面図、第６図は従来の定着
具の斜視図である。
１・・・型枠、２・・・ジヤツキ、３・・・ベツド枠、
４・・・ＦＲＰ緊張材、５・・・定着具、６・・・模、
７・・・筒体、８・・・型枠、９・・・シース、１０・
・・アンカー体、１１・・・嵌込空間、１２・・・定着
フランジ、１３・・・接続シース、１４・・・グラウト
排出口、１５・・・補強筋、１６・・・コンクリート、
１７・・・ジヤツキ、１８・・・把持部。
第１図
第４図
第５図
（ａ）
（ｂ）
第２図
第３図
第６図Figures 1.2 and 3.4 show examples, and the first
The figure is a cross-sectional view of the inside of the formwork during concrete pouring, Figures 2.3 are perspective views of the sheath and connecting sheath, Figure 4 is a cross-sectional view of tension members being stretched and post tension introduced, and Figure 5 (a).
, (b) is a plan view and a side view of a formwork and a head frame according to a conventional pretension introduction method, and FIG. 6 is a perspective view of a conventional fixing device. 1... Formwork, 2... Jacket, 3... Bed frame,
4...FRP tension material, 5...fixer, 6...model,
7... Cylindrical body, 8... Formwork, 9... Sheath, 10.
...Anchor body, 11... Fitting space, 12... Fixing flange, 13... Connection sheath, 14... Grout outlet, 15... Reinforcement bar, 16... Concrete,
17... Jacket, 18... Gripping part. Figure 1 Figure 4 Figure 5 (a) (b) Figure 2 Figure 3 Figure 6
Claims (1)
筋すべき位置に沿うシース、およびそのシース端部位置
にシース内に連通し打設コンクリート外面に開口する定
着具嵌込空間を有するポストテンション用アンカー体を
配置し、コンクリートを打設し硬化した後に、シースお
よびアンカー体内に嵌込んだ定着具を挿通し配したＦＲ
Ｐ緊張材端部を、アンカー体外側面を反力点となしジャ
ッキで引張り、アンカー体内定着具の楔で挟着固定して
ポストテンションを導入することを特徴とするＦＲＰ緊
張材のポストテンション導入方法。(1) Prior to pouring concrete, a post that has a sheath along the position where the FRP tendons are to be reinforced, and a space at the end of the sheath for fitting a fixing device that communicates with the sheath and opens to the outer surface of the poured concrete. After the tension anchor body is placed and concrete is poured and hardened, the sheath and anchor fitted into the anchor body are inserted through the FR.
A method for introducing post-tension into an FRP tension material, which comprises: pulling the end of the P tension material with a jack using the outer surface of the anchor body as a reaction force point, and clamping and fixing the end portion with a wedge of an anchor body fixing device to introduce post-tension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7286590A JPH03271466A (en) | 1990-03-22 | 1990-03-22 | Method of introducing post-tension for frp tension member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7286590A JPH03271466A (en) | 1990-03-22 | 1990-03-22 | Method of introducing post-tension for frp tension member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03271466A true JPH03271466A (en) | 1991-12-03 |
Family
ID=13501659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7286590A Pending JPH03271466A (en) | 1990-03-22 | 1990-03-22 | Method of introducing post-tension for frp tension member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03271466A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132709A (en) * | 2013-03-18 | 2013-06-05 | 中国建筑第八工程局有限公司 | Method to replace reinforcing mesh piece with fiber reinforce plastic (FRP) ribs |
| JP2019064054A (en) * | 2017-09-29 | 2019-04-25 | 株式会社栗本鐵工所 | Insertion tool for sheath connection port molding, molding method of sheath connection port and installation method of concrete segment |
-
1990
- 1990-03-22 JP JP7286590A patent/JPH03271466A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132709A (en) * | 2013-03-18 | 2013-06-05 | 中国建筑第八工程局有限公司 | Method to replace reinforcing mesh piece with fiber reinforce plastic (FRP) ribs |
| JP2019064054A (en) * | 2017-09-29 | 2019-04-25 | 株式会社栗本鐵工所 | Insertion tool for sheath connection port molding, molding method of sheath connection port and installation method of concrete segment |
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