JPH04203058A - Spacer device for batten like tendon - Google Patents
Spacer device for batten like tendonInfo
- Publication number
- JPH04203058A JPH04203058A JP33423190A JP33423190A JPH04203058A JP H04203058 A JPH04203058 A JP H04203058A JP 33423190 A JP33423190 A JP 33423190A JP 33423190 A JP33423190 A JP 33423190A JP H04203058 A JPH04203058 A JP H04203058A
- Authority
- JP
- Japan
- Prior art keywords
- tendon
- sheath
- spacer
- blanks
- shaped
- 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.)
- Granted
Links
- 210000002435 tendon Anatomy 0.000 title claims abstract description 84
- 125000006850 spacer group Chemical group 0.000 title claims abstract description 51
- 239000000463 material Substances 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 4
- 229920006231 aramid fiber Polymers 0.000 abstract description 2
- 239000003822 epoxy resin Substances 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 229920000647 polyepoxide Polymers 0.000 abstract description 2
- 239000012779 reinforcing material Substances 0.000 abstract description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 abstract 1
- 239000011440 grout Substances 0.000 description 5
- 239000002390 adhesive tape Substances 0.000 description 4
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 3
- 239000011151 fibre-reinforced plastic Substances 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010959 steel Substances 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〕
この発明は帯板状テンドン素材を用い、ポストテンショ
ン方式によりコンクリート部材にプレストレス力を導入
する場合に用いるシース内のスペーサ装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a spacer device within a sheath used when applying a prestress force to a concrete member using a post-tension method using a band-like tendon material.
従来のポストテンション用のテンドンは断面が円形か、
それに近いものであり、これを用いてコンクリートにプ
レストレス力を導入するときにはスペーサを用いないか
、円筒状のシース内に第４図に示す多数のテンドンに挿
通孔１がある円形断面をした棒状の一体形スペーサ２を
用いていた。Conventional tendons for post-tensioning have a circular cross section or
It is similar to that, and when using this to introduce prestress force into concrete, a spacer is not used, or a bar-shaped rod with a circular cross section has a number of tendons with insertion holes 1 as shown in Figure 4 in a cylindrical sheath. An integral spacer 2 was used.
ところが近年、テンドンとコンクリートとの付着強度を
向上させる目的でテンドンの断面を長方形となし、表面
に凹凸加工を施したＦＲＰ（繊維強化プラスチック）製
等の帯板状のテンドン素材が用いられるようになったが
、この様なテンドンに適したスペーサがなかった。However, in recent years, in order to improve the adhesion strength between tendons and concrete, band-shaped tendon materials such as FRP (fiber-reinforced plastic) with a rectangular cross section and textured surfaces have been used. However, there was no spacer suitable for this kind of tendon.
ポストテンション方式により、構造物を構築する場合、
コンクリート打設後にテンドンを緊張するので、コンク
リートとテンドンの付着を切る必要があり、テンドンを
シースの中に入れて配筋する。また、シースを介してテ
ンドンと周囲のコンクリートとの付着を確保する目的、
およびテンドンが鋼製の場合にテンドンの腐食を防止す
る目的でシース内にグラウトをするすることが一般的で
ある。When constructing a structure using the post-tension method,
Since the tendons are under tension after concrete is poured, it is necessary to cut the adhesion between the concrete and the tendons, and then place the tendons in a sheath and place reinforcement. In addition, the purpose is to ensure adhesion between the tendon and the surrounding concrete through the sheath,
When the tendon is made of steel, it is common to grout the inside of the sheath to prevent corrosion of the tendon.
テンドンは通常、外力に対して効率よく働くように、曲
げ上げまたは、曲げ下げて配置するのが一般的である。Tendons are generally bent up or bent down so that they work efficiently against external forces.
この様な場合、テンドンを緊張するとテンドンが直線に
なろうとするため、曲げ上げ、曲げ下げ部分の凸部にお
いてシースとテンドンおよび帯板状のテンドン素材相互
が接触する。そのために、帯板状のテンドン素材を用い
る場合にはテンドンの角に傷が付く、またはテンドン素
材が縦割れを起す、テンドン素材間にグラウトがまわり
込まなくなる等の欠点が起り易かった。In such a case, when the tendon is tensed, the tendon tends to straighten, so that the sheath, the tendon, and the band-like tendon material come into contact with each other at the convex portions of the bent-up and bent-down portions. Therefore, when using a band-like tendon material, disadvantages such as damage to the corners of the tendon, vertical cracking of the tendon material, and failure of grout to wrap between the tendon materials tend to occur.
この発明は上記事情に鑑みなされたものである。その目
的はテンドンの損傷発生を防止することができ、グラウ
トの充填性がよく、しかも、テンドン断面の対角線の長
さをシース内径の近くまで広げることができて、シース
内径を著しく小となし、コンクリート部材厚さを薄くす
ることができる帯板状テンドン用スペーサ装置を提案す
るにある。This invention was made in view of the above circumstances. The purpose of this is to prevent damage to the tendons, provide good grout filling properties, and increase the length of the diagonal line of the tendon cross section to near the inner diameter of the sheath, making the inner diameter of the sheath significantly smaller. An object of the present invention is to propose a spacer device for a band-like tendon that can reduce the thickness of a concrete member.
この帯板状テンドン用スペーサ装置は、断面円形のシー
ス内に挿通した並列する複数の帯板状テンドン素材から
なるテンドンにポストテンション方式によりプレストレ
ス力を導入するに用いる帯板状テンドン用スペーサ装置
において、前記テンドン素材表面とシース内面との間に
シース内面と曲率半径が等しい断面欠円形の帽子状スペ
ーサ、前記テンドン素材相互間に断面長方形の板状スペ
ーサを配してなることを特徴とする。This spacer device for band-like tendons is used to introduce a prestress force by a post-tension method to tendons made of a plurality of parallel band-like tendon materials inserted into a sheath with a circular cross section. , characterized in that a cap-shaped spacer with a circular cross-section having a radius of curvature equal to the inner surface of the sheath is arranged between the surface of the tendon material and the inner surface of the sheath, and a plate-shaped spacer with a rectangular cross-section between the tendon materials. .
この実施例はアラミド繊維（芳香族ポリアミド繊維）を
強化材、エポキシ樹脂をマトリックス材とするＦＲＰ製
の帯板状テンドン素材３を用いた。第１図は並列する複
数のテンドン素材３からなるテンドン４を断面円形のシ
ース５内に挿通したものである。テンドン４の外側に位
置する１つのテンドン素材３表面とシース５内面との間
には、シース内面との曲率半径（シース幅方向断面）と
曲率半径が等しい円弧面６と弦平面７で囲まれた断面欠
円形の帽子状スペーサ８が弦平面７をテンドン素材３表
面に添付け、円弧面６をシース５内面に向は配しである
。In this example, a band-shaped tendon material 3 made of FRP was used, in which aramid fiber (aromatic polyamide fiber) was used as a reinforcing material and epoxy resin was used as a matrix material. In FIG. 1, a tendon 4 made of a plurality of tendon materials 3 arranged in parallel is inserted into a sheath 5 having a circular cross section. Between the surface of one tendon material 3 located on the outside of the tendon 4 and the inner surface of the sheath 5, there is an arcuate surface 6 and a chordal plane 7, which have a radius of curvature equal to that of the inner surface of the sheath (cross section in the sheath width direction). A cap-shaped spacer 8 with a circular cross-section attaches the chordal plane 7 to the surface of the tendon material 3, and the arcuate surface 6 is oriented toward the inner surface of the sheath 5.
また、テンドン素材３．３間には断面長方形の板状スペ
ーサ９が配しである。Further, a plate-shaped spacer 9 having a rectangular cross section is arranged between the tendon materials 3.3.
帽子状スペーサ８はテンドン４の外側に位置する２つの
テンドン素材３の表面とシース５内面との間に配しても
よいが、少なくとも曲線状に配置されるテンドンの曲線
内側にあるテンドン素材３面とシース５との間に配置す
ればよい。The cap-shaped spacer 8 may be arranged between the surfaces of the two tendon materials 3 located on the outside of the tendon 4 and the inner surface of the sheath 5, but at least the tendon materials 3 located on the inside of the curve of the tendons arranged in a curved shape. It may be placed between the surface and the sheath 5.
帽子状スペーサ８と板状スペーサ９とは同−断面上に存
在しないとテンドン４に面外せん断力が作用するという
新な問題が発生する。このために、例えば第２１！Ｉの
ごとく、帽子状スペーサ８．板状スペーサ９およびテン
ドン素材３を粘着テープ１０等で捲き、あるいは相互間
を接着剤により固着し一体化する。強固に一体化でき、
緊張時にテンドン素材、帽子状スペーサ、板状スペーサ
が同一の動きをする時は問題ないが、粘着テープ等で一
体化した場合は、テンドン素材と各スペーサとの摩擦力
の大小によって、緊張時にテンドン素材とスペーサがず
れる恐れが生じる。そこで、この様な場合は帽子状スペ
ーサまたは板状スペーサのいずれか一方を十分に長くと
り、緊張時にスペーサが多少ずれても同一位置でスペー
サ群を構成するようにする。If the cap-shaped spacer 8 and the plate-shaped spacer 9 do not exist on the same cross section, a new problem arises in that an out-of-plane shearing force acts on the tendon 4. For this purpose, for example, the 21st! Cap-shaped spacer 8 as shown in I. The plate-shaped spacer 9 and the tendon material 3 are rolled up with an adhesive tape 10 or the like, or they are fixed together with an adhesive to be integrated. Can be strongly integrated,
There is no problem if the tendon material, cap-shaped spacer, and plate-shaped spacer move in the same manner during tension, but if they are integrated with adhesive tape, etc., the tendon material may move when tensioned depending on the magnitude of the frictional force between the tendon material and each spacer. There is a risk that the material and spacer may become misaligned. Therefore, in such a case, either the cap-shaped spacer or the plate-shaped spacer should be made sufficiently long so that even if the spacer is slightly shifted during tensioning, the spacer group is configured at the same position.
または、各スペーサのテンドン素材と接する面に突起を
設けるなどして、テンドン素材とスペーサ間の摩擦係数
を大となし、各スペアすとテンドンが同一の動きを示す
ようにする。Alternatively, by providing a protrusion on the surface of each spacer that comes into contact with the tendon material, the coefficient of friction between the tendon material and the spacer is increased so that the tendons exhibit the same movement when each spacer is used.
シース内に挿通したテンドンを緊張し、コンクリート部
材に効率よくプレストレスを導入するためには、シース
と帽子状スペーサ間の摩擦を低減せしめると効果的であ
る。In order to tension the tendons inserted into the sheath and efficiently introduce prestress into the concrete member, it is effective to reduce the friction between the sheath and the cap-shaped spacer.
そこで、例えば第２図のごとく、帽子状スペーサ８の円
弧面に摩擦低減用のテフロンテーブ１１を貼着けてシー
スとスペーサ間の摩擦力を低減させる。Therefore, as shown in FIG. 2, for example, a Teflon tape 11 for reducing friction is attached to the arcuate surface of the cap-shaped spacer 8 to reduce the frictional force between the sheath and the spacer.
このスペーサ装置は以上の構成からなり、複数の並列す
るテンドン素材からなるテンドンは、断面円形のシース
との間にシース内面と曲率半径が等しい断面欠円形の帽
子状スペーサが配してあり、テンドン素材間には板状ス
ペーサが配してあって、テンドン素材とシース内面間お
よびテンドン素材間に接触が起らず、テンドン素材の損
傷が防止できる。また、テンドン素材間、テンドン素材
とシース内面の間にスペーサ厚さの間隔が保たれ、グラ
ウトの回りがよい。 このスペーサ装置は第３図のごと
く、断面円形シース５内に、複数の並列する帯板状テン
ドン素材３を帽子状スペーサ８と板状スペーサ９を用い
て挿通し、テンドン４の長方形の断面の対角線長さｌを
シース５内の内径まで拡げることができる。This spacer device has the above-mentioned structure. The tendon is made of a plurality of tendon materials arranged in parallel, and a cap-shaped spacer with a circular cross-section having the same radius of curvature as the inner surface of the sheath is arranged between the tendon and the sheath with a circular cross-section. A plate-shaped spacer is arranged between the materials, so that contact does not occur between the tendon material and the inner surface of the sheath and between the tendon materials, and damage to the tendon materials can be prevented. In addition, the spacing equal to the spacer thickness is maintained between the tendon materials and between the tendon materials and the inner surface of the sheath, allowing for good grout coverage. As shown in FIG. 3, this spacer device inserts a plurality of parallel strip-shaped tendon materials 3 into a sheath 5 with a circular cross section using a cap-shaped spacer 8 and a plate-shaped spacer 9, and forms a rectangular cross-section of the tendon 4. The diagonal length l can be extended to the inner diameter within the sheath 5.
この発明は以上の通りであり、次の効果を奏する。 This invention is as described above, and has the following effects.
■ テンドンの損傷が防止できる。■ Damage to tendons can be prevented.
■ 欠陥部分がないグラウトの注入が可能となる。■ It becomes possible to inject grout without defective parts.
■ シースの径を細くして、コンクリート部材の経済的
な断面設計が可能となる。■ By reducing the diameter of the sheath, economical cross-sectional design of concrete members is possible.
第１図は実施例のスペーサ装置を用いシース内に挿通し
たテンドンの断面図、第２図はテンドン素材とスペーサ
を粘着テープで固着一体化したテンドンの斜視図、第３
図は長方形断面の対角線長さをシース内径に近づけたテ
ンドンの断面図、第４図は従来の断面円形のテンドン用
のスペーサの斜視図である。
１・・・テンドン挿通孔、２・・・一体形スペーサ、３
・・・帯板状テンドン素材、４・・・テンドン、５・・
・シース、６・・・円弧円、７・・・弦平面、８・・・
帽子状スペーサ、９・・・平板状スペーサ、１０・・・
粘着テープ、１１・・・テフロンテープ。
第 １ 閃
第３図
＼・′
第２図
第４図Fig. 1 is a sectional view of a tendon inserted into a sheath using the spacer device of the embodiment, Fig. 2 is a perspective view of a tendon in which the tendon material and spacer are fixed and integrated with adhesive tape, and Fig. 3
The figure is a cross-sectional view of a tendon in which the diagonal length of the rectangular cross-section is close to the inner diameter of the sheath, and FIG. 4 is a perspective view of a conventional spacer for a tendon with a circular cross-section. 1...Tendon insertion hole, 2...Integrated spacer, 3
...Strip-like tendon material, 4...Tendon, 5...
・Sheath, 6... Arc circle, 7... Chord plane, 8...
Hat-shaped spacer, 9... Flat plate-shaped spacer, 10...
Adhesive tape, 11...Teflon tape. 1st Flash Figure 3＼・' Figure 2 Figure 4
Claims (1)
板状テンドン素材からなるテンドンにポストテンション
方式によりプレストレス力を導入するに用いる帯板状テ
ンドン用スペーサ装置において、前記テンドン素材表面
とシース内面との間にシース内面と曲率半径が等しい断
面欠円形帽子状スペーサ、前記テンドン素材相互間に断
面長方形の板状スペーサを配してなることを特徴とする
帯板状テンドン用スペーサ装置。(1) In a spacer device for a band-shaped tendon used to introduce a prestress force by a post-tension method to a tendon made of a plurality of parallel band-shaped tendon materials inserted into a sheath with a circular cross section, the surface of the tendon material 1. A spacer device for a band-like tendon, comprising: a hat-shaped spacer with a circular cross-section having a radius of curvature equal to that of the inner surface of the sheath; and a plate-shaped spacer with a rectangular cross-section between the tendon materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33423190A JPH0788710B2 (en) | 1990-11-30 | 1990-11-30 | Spacer device for strip-shaped tendon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33423190A JPH0788710B2 (en) | 1990-11-30 | 1990-11-30 | Spacer device for strip-shaped tendon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04203058A true JPH04203058A (en) | 1992-07-23 |
| JPH0788710B2 JPH0788710B2 (en) | 1995-09-27 |
Family
ID=18275015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33423190A Expired - Fee Related JPH0788710B2 (en) | 1990-11-30 | 1990-11-30 | Spacer device for strip-shaped tendon |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0788710B2 (en) |
-
1990
- 1990-11-30 JP JP33423190A patent/JPH0788710B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0788710B2 (en) | 1995-09-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |