EP0197912B1 - Verankerung für Spannglieder - Google Patents

Verankerung für Spannglieder Download PDF

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Publication number
EP0197912B1
EP0197912B1 EP86890031A EP86890031A EP0197912B1 EP 0197912 B1 EP0197912 B1 EP 0197912B1 EP 86890031 A EP86890031 A EP 86890031A EP 86890031 A EP86890031 A EP 86890031A EP 0197912 B1 EP0197912 B1 EP 0197912B1
Authority
EP
European Patent Office
Prior art keywords
anchoring
wedge
stressing
anchoring body
pressed
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
Application number
EP86890031A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0197912A3 (en
EP0197912A2 (de
Inventor
Hermann Dipl.-Ing. Thal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vorspann Technik GmbH
Original Assignee
Vorspann Technik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Vorspann Technik GmbH filed Critical Vorspann Technik GmbH
Publication of EP0197912A2 publication Critical patent/EP0197912A2/de
Publication of EP0197912A3 publication Critical patent/EP0197912A3/de
Application granted granted Critical
Publication of EP0197912B1 publication Critical patent/EP0197912B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E04C5/122—Anchoring devices the tensile members are anchored by wedge-action
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/39—Cord and rope holders
    • Y10T24/3969—Sliding part or wedge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7062—Clamped members
    • Y10T403/7064—Clamped members by wedge or cam
    • Y10T403/7066—Clamped members by wedge or cam having actuator

Definitions

  • the invention relates to anchoring for tendons, in particular for prestressing strands or tendons, the tendon being anchored in at least one anchor body by means of at least two pressed parts which are penetrated by it and arranged one behind the other.
  • a conventional anchor body is designed as a cone ring, in which an at least two-part ring wedge is used, the inner wall of which is serrated.
  • the teeth of the inner wall press into the surface of the tendon and create notches.
  • the cross-section of the notches can cause the tendon to tear at these points in the event of briefly high static loads or in the case of long-term dynamic loads.
  • SU-A-897 999 describes an anchoring in which the tendons are anchored in an anchor body by means of two ring wedges made of the same material. These sit in conical openings, which are both on the side facing the building and on the opposite side. Therefore, the disadvantages listed in the previous paragraph occur unabated in this version.
  • the object of the invention is to provide an anchoring and a method for producing the same, by means of which the above risk of premature tearing of the tendon is eliminated or reduced to a minimum.
  • the anchoring of the type mentioned at the outset is characterized in that the pressing part which is more distant from the structure is harder or as hard as the tendon and the pressing part which is closer to the structure is softer than the tendon.
  • the pressed part closer to the structure is made of plastic or soft metal, whereby soft metal is understood to be a metal which is softer than the tendon, e.g. not hardened steel.
  • a layer of plastic or soft metal is provided on the inside in the pressed part closer to the building.
  • the anchor body consists of a first anchor body which is further away from the building and a second anchor body which is closer to the building, the pressed parts being designed as anchor wedges.
  • the anchor body is designed as a one-piece anchor body, at least the pressed part which is more distant from the structure being designed as an anchor wedge.
  • the pressing part closer to the building either has a cylindrical shape or it is designed as an anchor wedge, the cone tip of which is directed away from the building.
  • a method for producing an anchor according to the first embodiment is characterized in that the tendon is tensioned first, whereupon the anchor wedge of the first anchor body is pressed in by inserting an intermediate member between the first and the second anchor body, during which the first anchor body is pressed over the intermediate member supports the second anchor body, then the intermediate member is removed and the anchor wedge of the second anchor body is then pressed in via the first anchor body.
  • a method for producing an anchor according to the second embodiment is characterized in that the tendon is first tensioned, whereupon the anchor wedge is pressed into the anchor body by inserting an intermediate member between the anchor body and an anchor plate, during which the anchor body is pressed onto the anchor plate via the intermediate member supported, then the intermediate member removed, and then the cylindrical press part or the anchor wedge is pressed over the anchor body.
  • Fig. 1 denotes the tendon in the form of a tendon, tension wire or the like.
  • 2 denotes a first anchor body in the form of a cone ring, which is supported via an intermediate member 3 in the form of a two-part washer ring on a second anchor body 4, which is also designed as a cone ring and is supported on an anchor plate 5.
  • anchor wedges 6 and 7 are used in the form of ring wedges.
  • the anchoring is produced in such a way that the tendon 1 is tensioned first, whereupon the anchor wedge 6 is pressed into the first anchor body 2, during which the anchor member 4 is supported on the anchor body 4 via the intermediate member 3. Thereafter, the two-part intermediate member 3 is removed, the tendon 1 being re-tensioned, so that the first anchor body 2 lifts slightly from the intermediate member 3. Then the tendon 1 is relaxed, so that the first anchor body 2 on the anchor wedge 7 of the second anchor body 4 initially rests, as shown in FIG. 2, whereupon the anchor wedge 7 is pressed into the second anchor body 4 via the first anchor body 2 by further releasing the tension member 1 until the first anchor body 2 rests directly on the second anchor body 4, as shown in Fig. 3.
  • the pressing in can also be carried out or supported mechanically by means of a pressing device. If necessary, however, a small distance between the two anchor bodies 2 and 4 can also be maintained, ie the first anchor body 2 is supported in the end position on the anchor wedge 7 of the second anchor body 4. When pressed in, the softer material of the anchor wedge 7 penetrates or "flows" into the cavities between the prestressing strands.
  • the anchor bodies 2 'and 4' accordingly each have three conical openings, into which the anchor wedges 2 'and 4' are inserted. Accordingly, the intermediate member 3 'has three openings.
  • the anchor plate 5 ' has only one opening for the passage of the three tendons 1.
  • the anchoring takes place in the same way as in the first embodiment, i.e. the installation phases shown in FIGS. 4, 5 and 6 correspond to those of FIGS. 1 to 3.
  • Plastic or soft metal is preferably used as the material for the anchor wedges 7 of the second anchor body 4 or 4 ', whereby soft metal is to be understood as a metal which is softer than the tendon, e.g. not hardened steel.
  • soft metal is to be understood as a metal which is softer than the tendon, e.g. not hardened steel.
  • FIGS. 7 and 8 it is provided that these consist partly of plastic or soft metal.
  • a conical inner part 8 made of plastic or soft metal is provided, which is surrounded by a conical outer part 9.
  • a cylindrical inner part 8 'made of plastic or soft metal is provided, which is surrounded by a conical outer part 9'.
  • the inner parts 8, 8 'and the outer parts 9, 9' can either be loosely inserted or e.g. be connected by gluing.
  • a sleeve made of plastic or soft metal is mounted on the tendon 1, which corresponds to the inner part 8 or 8 ', on which the outer part 9 or 9'
  • FIG. 9 shows a diagram of the tension force curve V o along the tendon 1 in its longitudinal axis X.
  • I denotes the free area of the tendon 1, II the area within the second anchor body 4, and 111 the area within the first anchor body 2. It is It can be seen that the tension force decreases by AV within the second anchor body 4 and is reduced to zero within the first anchor body 2 (curve a).
  • Curve b drawn with a broken line shows the tension force curve if only the first anchor body 2 were present.
  • the anchor is particularly suitable for use with cable-stayed bridge constructions.
  • the pressing part 7 ' has a cylindrical shape and is located together with the armature wedge 6 in a one-piece armature body 8. Between the armature body 8 and the armature plate 5, an intermediate member 3 in the form of a two-part washer is provided .
  • the anchoring is produced in such a way that the tendon 1 is tensioned first, whereupon the anchor wedge 6 is pressed into the anchor body 8, while the latter is supported on the anchor plate 5 via the intermediate member 3. Thereafter, the intermediate member 3 is removed, the tendon 1 being re-tensioned, so that the anchor body 8 lifts slightly from the intermediate member 3. Subsequently, the tendon 1 is relaxed, so that the anchor body 8 initially rests on the end face of the cylindrical pressing part 7 ', as shown in FIG. 11, whereupon by further relaxing the tendon 1, the pressing part 7' is pressed into the anchor body 8 or into the Cavities of the tendon 1 take place until the anchor body 8 rests directly on the anchor plate 5, as shown in FIG. 12.
  • the pressing can in turn be carried out mechanically by means of a pressing device, or it can be supported. If necessary, a small distance between the anchor body 8 and the anchor plate 5 can also be maintained, so that the anchor body 8 is supported in the end position on the pressing part 7 'on the anchor plate 5.
  • the pressing part is designed as an anchor wedge 7 ′′, the cone tip of which, however, is directed away from the building.
  • the anchoring is produced in the same way as in the third exemplary embodiment, so that a description thereof is unnecessary. It goes without saying that the embodiments of the pressed parts or anchor wedges according to FIGS. 7 and 8 can also be used in the embodiments according to FIGS. 10 to 12 and 13 to 15, and that these embodiments also for several tendons, similar to in 4 to 6, can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Piles And Underground Anchors (AREA)
  • Bridges Or Land Bridges (AREA)
  • Reinforcement Elements For Buildings (AREA)
EP86890031A 1985-03-05 1986-02-13 Verankerung für Spannglieder Expired - Lifetime EP0197912B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0064685A AT390100B (de) 1985-03-05 1985-03-05 Verankerung fuer spannglieder
AT646/85 1985-03-05

Publications (3)

Publication Number Publication Date
EP0197912A2 EP0197912A2 (de) 1986-10-15
EP0197912A3 EP0197912A3 (en) 1987-05-27
EP0197912B1 true EP0197912B1 (de) 1990-04-11

Family

ID=3496085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86890031A Expired - Lifetime EP0197912B1 (de) 1985-03-05 1986-02-13 Verankerung für Spannglieder

Country Status (5)

Country Link
US (1) US4744691A (enrdf_load_stackoverflow)
EP (1) EP0197912B1 (enrdf_load_stackoverflow)
JP (1) JPS61211555A (enrdf_load_stackoverflow)
AT (1) AT390100B (enrdf_load_stackoverflow)
DE (1) DE3670331D1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2372036A1 (de) 2010-03-22 2011-10-05 Hermann Thal Verankerung für Spannglieder

Families Citing this family (24)

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FR2686915B1 (fr) * 1992-01-31 1998-10-16 Gtm Batimen Travaux Publ Dispositif pour l'ancrage sous tension de tirants en materiau composite.
ATE150123T1 (de) * 1993-01-11 1997-03-15 Vsl Int Ag Spannverankerung für mindestens ein innerhalb eines hüllrohres verlaufendes zugelement und verfahren zum herstellen der spannverankerung
ATE192528T1 (de) * 1994-04-25 2000-05-15 Empa Verankerung für hochleistungsfaserverbundwerkstoff-drähte
US5630301A (en) * 1995-05-25 1997-05-20 Harris P/T, A Division Of Harris Steel Limited Anchorage assembly and method for post-tensioning in pre-stressed concrete structures
US5718090A (en) * 1996-06-24 1998-02-17 Wei-Hwang; Lin Prestressed concrete tensioning system
NO322852B1 (no) * 2000-05-31 2006-12-11 Aker Kvaerner Subsea As Terminering av strekklegeme
US5890684A (en) * 1997-03-24 1999-04-06 Stewart; Troy Duncan Electrical connector apparatus and method for stranded cable
US6220902B1 (en) 1999-05-13 2001-04-24 Unit Electrical Engineering Ltd. Method and apparatus for connecting an object to a device
FR2798409B1 (fr) * 1999-09-15 2002-01-04 Freyssinet Int Stup Systeme de connection d'un cable a une structure d'ouvrage de construction
EP1507050A1 (de) * 2003-08-13 2005-02-16 Sika Technology AG Krafteinleitungselement
AT412564B (de) 2003-12-22 2005-04-25 Burtscher Stefan L Dipl Ing Dr Keilverankerung für vorgespannte und/oder belastete zugelemente
RU2398083C2 (ru) * 2005-12-01 2010-08-27 Нок Лок Лайсензинг Лимитед Крепежное устройство для опор
JP4822853B2 (ja) * 2006-01-18 2011-11-24 タマホーム 株式会社 鉄筋係止具
ES2317743B1 (es) * 2006-06-30 2010-02-05 Tecnicas Del Pretensado Y Servicios Auxiliares, S.L. Sistema de estanqueidad para anclajes en puentes atirantados.
EP2371753A1 (de) * 2010-03-29 2011-10-05 Inventio AG Seilklemme
CN102363959B (zh) * 2011-11-23 2014-06-04 上海强劲地基工程股份有限公司 一种节能型压力分散式抗浮桩抗拔筋体连接结构
EP2631392A1 (de) * 2012-02-21 2013-08-28 Sika Technology AG Vorrichtung zur Krafteinleitung in Zugglieder aus faserverstärkten Kunststoff-Flachbandlamellen
CN104870728B (zh) * 2012-12-18 2018-03-02 乌本产权有限公司 锚、张紧设备、风能设备和用于将拉绳在锚上张紧的方法
US10753111B2 (en) * 2016-05-12 2020-08-25 Velocitel, Inc. Rod de-tensioning device
JP6901965B2 (ja) * 2017-12-26 2021-07-14 三井住友建設株式会社 定着具
US11174651B1 (en) 2020-06-30 2021-11-16 Frank Fischer Tensioning system and method
CN112376803A (zh) * 2020-11-18 2021-02-19 南通装配式建筑与智能结构研究院 一种frp钢绞线复合筋锚具及锚固方法
CN112647429B (zh) * 2020-12-23 2022-07-26 蒋友富 一种带有锚固装置的箱梁及箱梁桥
US12054947B1 (en) * 2024-01-08 2024-08-06 King Faisal University Multi-layer wedge anchorage for FRP plates and FRP tendons

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US1529734A (en) * 1924-06-28 1925-03-17 Barbour Russell Clyde Multiple-stage fishing tool
AT233785B (de) * 1959-05-12 1964-05-25 Antonio Dipl Ing Brandestini Drahtbündelverankerung für Spannbetonkonstruktionen
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NL293083A (nl) * 1962-05-23 1965-07-26 Hutten Und Bergwerke Rheinhausen Ag Wigverankering voor wapeningsstaven voor voorgespannen beton
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2372036A1 (de) 2010-03-22 2011-10-05 Hermann Thal Verankerung für Spannglieder

Also Published As

Publication number Publication date
US4744691A (en) 1988-05-17
EP0197912A3 (en) 1987-05-27
ATA64685A (de) 1989-08-15
EP0197912A2 (de) 1986-10-15
AT390100B (de) 1990-03-12
JPH0325665B2 (enrdf_load_stackoverflow) 1991-04-08
DE3670331D1 (de) 1990-05-17
JPS61211555A (ja) 1986-09-19

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