JPH0643314Y2 - Tension end fixing device - Google Patents
Tension end fixing deviceInfo
- Publication number
- JPH0643314Y2 JPH0643314Y2 JP1989007147U JP714789U JPH0643314Y2 JP H0643314 Y2 JPH0643314 Y2 JP H0643314Y2 JP 1989007147 U JP1989007147 U JP 1989007147U JP 714789 U JP714789 U JP 714789U JP H0643314 Y2 JPH0643314 Y2 JP H0643314Y2
- Authority
- JP
- Japan
- Prior art keywords
- bearing plate
- fixing
- tension member
- tension
- metal fitting
- 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
Landscapes
- Piles And Underground Anchors (AREA)
- Bridges Or Land Bridges (AREA)
- Reinforcement Elements For Buildings (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、プレストレストコンクリート構造におけるPC
鋼材や、鉄骨アーチ型ドームにおける鉄骨端部引張材、
斜張橋における吊斜材、アースアンカーにおける引張材
等の各種緊張材の端部を構造体に定着させるための緊張
材の端部定着装置に関する。[Detailed Description of the Invention] (Industrial application field) The present invention is a PC in a prestressed concrete structure.
Steel materials, steel frame end tension materials in steel arch dome,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension member end fixing device for fixing the ends of various tension members such as a suspended diagonal member in a cable-stayed bridge and a tension member in an earth anchor to a structure.
（従来の技術） 一般にプレストレストコンクリート構造においては、第
４図（イ）に示すようにコンクリート構造体１内に挿通
したPC鋼材からなる緊張材２の端部を、該構造体１の端
部に設けた支圧板３に通し、その外側にて定着金具４に
より抜け止めしている。また鉄骨アーチ型ドームにおい
ては、第４図（ロ）に示すようにアーチ型鉄骨５の端部
に支圧板３を突出させ、これに貫通させたPC鋼材からな
る緊張材２の端部を支圧板３の外側にて定着金具４にて
抜け止めしている。更に、斜張橋においては第４図
（ハ）に示すように支柱６と橋桁７に支持させた支圧板
3,3に吊り斜材８を貫通させ、その両者の外側にて定着
金具4,4にて抜け止めしている。更にまた、アースアン
カーにおいては第４図（ニ）に示すように、地中のアン
カーコンクリート９に一端を定着させたPC鋼材からなる
緊張材２の先端を、法面に敷設した法枠ブロック10に貫
通させ、表面側に支圧板３に通して定着金具４にて抜け
止めしている。(Prior Art) Generally, in a prestressed concrete structure, as shown in FIG. 4 (a), the end of the tension member 2 made of PC steel inserted in the concrete structure 1 is attached to the end of the structure 1. It is passed through the pressure bearing plate 3 provided and is prevented from coming off by the fixing metal fitting 4 on the outside thereof. Further, in the steel-frame arch type dome, as shown in FIG. 4B, the pressure bearing plate 3 is projected to the end of the arch type steel frame 5 and the end of the tension member 2 made of PC steel penetrated through the pressure bearing plate 3 is supported. A fixing metal fitting 4 prevents the pressure plate 3 from coming off outside the pressure plate 3. Further, in the cable-stayed bridge, as shown in FIG.
Suspended diagonal members 8 are penetrated through 3,3, and fixing metal fittings 4,4 prevent them from coming out on the outside of both. Furthermore, in the earth anchor, as shown in FIG. 4 (d), the method frame block 10 in which the tip of the tension material 2 made of PC steel having one end fixed to the anchor concrete 9 in the ground is laid on the slope. Through the pressure bearing plate 3, and the fixing metal fitting 4 prevents the pressure bearing plate 3 from coming off.
このような各種緊張材の端部を定着する定着金具４とし
ては、第５図（イ）に示すように、複数の緊張材2,2…
…を貫通させる定着ヘッド11が使用され、この定着ヘッ
ド11に対して緊張材２を抜け止めさせ、ナット12によっ
て支圧板３に支持させる形式のものや、第５図（ロ）に
示すように緊張材２にナット13を螺嵌し、これを支圧板
３に支持させるものがある。As shown in FIG. 5 (a), the fixing metal fitting 4 for fixing the end portions of such various tension members, as shown in FIG.
A fixing head 11 that penetrates the fixing head 11 is used, and the tension member 2 is prevented from coming off from the fixing head 11, and is supported by the bearing plate 3 by the nut 12, or as shown in FIG. There is one in which a nut 13 is screwed into the tension member 2 and is supported by the bearing plate 3.
（考案が解決しようとする問題点） 上述のような従来の緊張材２の端部定着構造では、支圧
板３の平らな表面に定着金具４を当接させるものである
ため、支圧板３の角度によって定着金具４の軸心方向が
決まるため、第６図に示すように支圧板３が傾いて取り
付けられると定着金具４の緊張材挿通孔4aの軸心ａと、
これに通された緊張材２の軸心ｂとの角度にずれが生
じ、定着部分にてPC鋼材等の緊張材に曲げ力が働くこと
となり、その曲げ部分ｃに応力が集中し、地震等によっ
て一時的に大きな引張力が加わったような場合に、これ
が設計時の安全率の範囲内であっても緊張材２に破断が
生じる虞れがあるという問題があった。(Problems to be Solved by the Invention) In the conventional end fixing structure for the tension member 2 as described above, since the fixing metal fitting 4 is brought into contact with the flat surface of the pressure bearing plate 3, the pressure bearing plate 3 is Since the axial direction of the fixing metal fitting 4 is determined by the angle, when the pressure bearing plate 3 is tilted and attached as shown in FIG. 6, the axial center a of the tension member insertion hole 4a of the fixing metal fitting 4,
There is a deviation in the angle with the axis b of the tension member 2 passed through this, and bending force acts on the tension member such as PC steel at the fixing portion, stress concentrates on the bending portion c, and an earthquake or the like occurs. Therefore, when a large tensile force is temporarily applied, the tension member 2 may be broken even if the tensile force is within the safety factor in design.
本考案は、このような従来の問題にかんがみ、緊張材の
定着部分において、定着金具の緊張材挿通孔の軸心と、
張設された緊張材の軸心とが常に平行になり、定着部分
に応力集中が生じない端部定着装置の提供を目的とした
ものである。In view of such a conventional problem, the present invention, in the fixing portion of the tension member, has the axial center of the tension member insertion hole of the fixing metal fitting,
The purpose of the present invention is to provide an end fixing device in which the axis of the tensioned tension member is always parallel to each other and stress concentration does not occur in the fixing portion.
（課題を達成するための手段） 上述の如き従来の問題を解決し、所期の目的を達成する
本考案の要旨とするところは、コンクリート等の構造物
に支持される支圧板と、該支圧板に貫通させたPC鋼材等
の緊張材を、該支圧板に対して抜け止めする定着金具と
を備えてなる緊張材の端部定着装置において、前記支圧
板と定着金具との対向面を互いに嵌まり合う球面とな
し、その両対向面間に潤滑材層を介在させたことに存す
る。(Means for Achieving the Problem) The gist of the present invention, which solves the above-mentioned conventional problems and achieves the intended purpose, is to provide a bearing plate supported by a structure such as concrete and the bearing plate. In an end fixing device for a tension member, which comprises a fixing member for preventing a tension member such as a PC steel material penetrating the pressure plate from coming off from the pressure plate, the opposing surfaces of the pressure plate and the fixing member are mutually It consists of a spherical surface that fits together, and a lubricant layer is interposed between the opposing surfaces.
（作用） 上述の如き本考案の緊張材の端部定着装置では、支圧板
が傾いて取り付けられ、定着金具の軸心と緊張材の軸心
にずれが生じたとしても、緊張の際に定着金具に旋回力
が加わると支圧板と定着金具間の球面が潤滑材層を介し
てすべり、両軸心が一致する方向に旋回し、緊張材に曲
げ方向の力が加わることなく定着がなされる。(Operation) In the tension member end fixing device of the present invention as described above, even if the bearing plate is attached in a tilted manner and the axis of the fixing metal fitting and the axis of the tension member are deviated, they are fixed when tension occurs. When a turning force is applied to the metal fitting, the spherical surface between the bearing plate and the fixing fitting slips through the lubricant layer, and turns in a direction where both axes coincide with each other, so that the tension material is fixed without applying bending force. .
（実施例） 次に本考案の実施例を第１図〜第３図について説明す
る。(Embodiment) Next, an embodiment of the present invention will be described with reference to FIGS.
第１図は斜張橋の吊り斜材や、鉄筋アーチ型ドームの引
張材等の緊張材の端部定着に実施した例を示している。
同図において２は緊張材であり、３は支圧板、４は定着
金具である。この定着金具４は外周に雄ねじ20を成型さ
せた円筒金具21と、該円筒金具21の外周に螺嵌させたナ
ット22と、このナット22と支圧板３との間に介在させた
座金23を有している。また円筒金具21内には短円柱状の
定着ヘッド24が収容され、この定着ヘッド24に複数の緊
張材2,2……の端部を貫通させ、それぞれ圧着グリップ2
5によって抜け止めさせている。FIG. 1 shows an example in which the suspension diagonal members of a cable-stayed bridge and tension members such as tension members of a reinforcing bar arch dome are fixed to the ends.
In the figure, 2 is a tension member, 3 is a bearing plate, and 4 is a fixing metal fitting. The fixing fitting 4 includes a cylindrical fitting 21 having a male screw 20 formed on the outer circumference thereof, a nut 22 screwed onto the outer circumference of the cylindrical fitting 21, and a washer 23 interposed between the nut 22 and the bearing plate 3. Have In addition, a short cylindrical fixing head 24 is accommodated in the cylindrical metal fitting 21, and the ends of the plurality of tension members 2, 2 ...
It is prevented from coming off by 5.
このように構成される定着金具４の座金23の支圧板側に
球形をした凸型滑り面26が成型されているとともに、こ
れに対向する支圧板３の表面には、凸型滑り面26と互い
に嵌まり合う球形をした凹型滑り面27が成型され、その
凹型滑り面27に固形潤滑材層28が被着されている。A spherical convex slide surface 26 is formed on the bearing plate side of the washer 23 of the fixing metal fitting 4 configured as described above, and the convex slide surface 26 and the convex slide surface 26 are formed on the surface of the bearing plate 3 facing this. A spherical concave sliding surface 27 that fits with each other is molded, and a solid lubricant layer 28 is applied to the concave sliding surface 27.
このように構成される定着装置は、円筒金具21をジャッ
キにて引張し、緊張材２を緊張させた状態でナット22を
螺進させて支圧板３に支持させるものであり、緊張材２
の引張応力の方向が支圧板の端面に対して垂直でない場
合には、両滑り面26,27間が相互に移動し、緊張材２に
曲げ応力が働かない状態で定着される。In the fixing device configured as described above, the cylindrical metal fitting 21 is pulled by a jack, and the tension member 2 is tensioned, and the nut 22 is screwed to be supported by the bearing plate 3.
If the direction of the tensile stress is not perpendicular to the end face of the bearing plate, the sliding surfaces 26 and 27 move relative to each other, and the tension member 2 is fixed without bending stress.
第２図はプレストレストコンクリートやアースアンカー
の引張材として使用されるPC鋼棒からなる緊張材の端部
定着に実施した例を示しており、同図において２は緊張
材であり、３は支圧板、４は定着金具である。緊張材２
は端部に雄ねじ29が成型されている。そして、定着金具
４は雄ねじ29に螺嵌したナットからなっている。この定
着金具４の支圧板側面には球状をした凸型滑り面26が成
型され、支圧板３の表面にはこの凸滑り面26が互いに嵌
まり合う球形の凹型滑り面27が成型させている。Fig. 2 shows an example in which the tension member made of PC steel rod used as a tension member for prestressed concrete and earth anchor was fixed to the end portion. In the figure, 2 is a tension member and 3 is a bearing plate. Reference numeral 4 is a fixing metal fitting. Tension material 2
Has an external thread 29 molded at the end. The fixing fitting 4 is composed of a nut screwed into the male screw 29. A spherical convex sliding surface 26 is formed on the side of the pressure bearing plate of the fixing member 4, and a spherical concave sliding surface 27 is formed on the surface of the pressure bearing plate 3 where the convex sliding surfaces 26 are fitted to each other. .
第３図はPC鋼棒を緊張材として使用した場合の他の例を
示している。この実施例では、定着金具４としてナット
30と座金31を使用し、座金31に凸型滑り面26が成型され
ている。その他は、第２図の実施例と同じである。FIG. 3 shows another example of using a PC steel rod as a tendon. In this embodiment, a nut is used as the fixing fitting 4.
30 and a washer 31 are used, and a convex slide surface 26 is molded on the washer 31. Others are the same as the embodiment of FIG.
（考案の効果） 上述したように本考案の緊張材の端部定着装置は、支圧
板と定着金具との接合部を互いに嵌まり合う球面状とな
し、その間に潤滑材層を介在させたことにより、緊張材
の引張応力によって曲げ方向の力が生じると、そのモー
メントによって支圧板に対する定着金具の方向が変更さ
れ、緊張材に曲げ力が加わることがなくなり、応力集中
によって破断する虞れがなく、安定性の高い定着が得ら
れることとなったものである。(Effect of the Invention) As described above, in the end portion fixing device of the tension member of the present invention, the joint between the pressure bearing plate and the fixing metal member is formed into a spherical shape that fits with each other, and the lubricant layer is interposed between them. Thus, when a tensile force of the tension member causes a force in the bending direction, the moment changes the direction of the fixing metal fitting with respect to the pressure plate, and the bending force is not applied to the tension member, and there is no risk of breakage due to stress concentration. However, a highly stable fixing can be obtained.
第１図〜第３図はそれぞれ本考案の別々の実施例を示す
断面図、第４図（イ）〜（ニ）はそれぞれ従来の緊張材
の別々の使用例の側面図、第５図（イ）（ロ）はそれぞ
れ従来の定着装置の別々の例を示す断面図、第６図は緊
張材に曲げモーメントが生じる場合の例を示す断面図で
ある。 ２……緊張材、３……支圧板、４……定着金具、26……
凸型滑り面、27……凹型滑り面、28……潤滑材層、1 to 3 are sectional views showing different embodiments of the present invention, FIGS. 4 (a) to 4 (d) are side views showing different usage examples of conventional tendons, and FIG. 5 ( (A) and (b) are cross-sectional views showing different examples of the conventional fixing device, and FIG. 6 is a cross-sectional view showing an example in which a bending moment is generated in the tension member. 2 ... Tension material, 3 ... Pressure plate, 4 ... Fixing metal fitting, 26 ...
Convex sliding surface, 27 …… Concave sliding surface, 28 …… Lubricant layer,
Claims (1)
板と、該支圧板に貫通させたPC鋼材等の緊張材を、該支
圧板に対して抜け止めする定着金具とを備えてなる緊張
材の端部定着装置において、前記支圧板と定着金具との
対向面を互いに嵌まり合う球面となし、その両対向面間
に潤滑材層を介在させたことを特徴としてなる緊張材の
端部定着装置。1. A tension comprising a bearing plate supported by a structure such as concrete, and a fixing metal fitting for preventing a tension member such as a PC steel material penetrating the bearing plate from coming off the bearing plate. In the end portion fixing device of the material, the opposing surfaces of the pressure bearing plate and the fixing metal member are formed as spherical surfaces that fit with each other, and the lubricant layer is interposed between the opposing surfaces. Fixing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989007147U JPH0643314Y2 (en) | 1989-01-25 | 1989-01-25 | Tension end fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989007147U JPH0643314Y2 (en) | 1989-01-25 | 1989-01-25 | Tension end fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0299125U JPH0299125U (en) | 1990-08-07 |
| JPH0643314Y2 true JPH0643314Y2 (en) | 1994-11-09 |
Family
ID=31211920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989007147U Expired - Lifetime JPH0643314Y2 (en) | 1989-01-25 | 1989-01-25 | Tension end fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0643314Y2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0739925Y2 (en) * | 1992-12-07 | 1995-09-13 | 川田建設株式会社 | Fixing structure at the end of diagonal cable |
| JP2816807B2 (en) * | 1994-02-22 | 1998-10-27 | 株式会社松田平田 | End support structure for tendon |
| JP4683939B2 (en) * | 2005-01-27 | 2011-05-18 | 株式会社安部日鋼工業 | Fixing pressure plate and PC member |
| JP6491030B2 (en) * | 2015-04-23 | 2019-03-27 | 三井住友建設株式会社 | Anchor cable fixing structure |
| JP7041425B2 (en) * | 2017-11-01 | 2022-03-24 | 吉佳エンジニアリング株式会社 | Load transmission part structure from anchor to pressure receiving plate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2735493C2 (en) * | 1977-08-05 | 1981-10-15 | Siemens AG, 1000 Berlin und 8000 München | A method for manufacturing a liquid crystal cell and a liquid crystal cell manufactured thereafter |
| DE3339058C2 (en) * | 1983-10-28 | 1987-04-23 | Dyckerhoff & Widmann AG, 8000 München | Exposed tensionable tension member |
-
1989
- 1989-01-25 JP JP1989007147U patent/JPH0643314Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0299125U (en) | 1990-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |