EP0949389B1 - Dispositif d'ancrage pour tirants - Google Patents

Dispositif d'ancrage pour tirants Download PDF

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Publication number
EP0949389B1
EP0949389B1 EP99106872A EP99106872A EP0949389B1 EP 0949389 B1 EP0949389 B1 EP 0949389B1 EP 99106872 A EP99106872 A EP 99106872A EP 99106872 A EP99106872 A EP 99106872A EP 0949389 B1 EP0949389 B1 EP 0949389B1
Authority
EP
European Patent Office
Prior art keywords
tension member
anchorage device
tension
anchor
anchoring device
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
EP99106872A
Other languages
German (de)
English (en)
Other versions
EP0949389A1 (fr
Inventor
Michael Blaschko
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.)
Bilfinger SE
Original Assignee
Bilfinger Berger AG
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 Bilfinger Berger AG filed Critical Bilfinger Berger AG
Priority to EP03023075A priority Critical patent/EP1380705B1/fr
Publication of EP0949389A1 publication Critical patent/EP0949389A1/fr
Application granted granted Critical
Publication of EP0949389B1 publication Critical patent/EP0949389B1/fr
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
    • E04C5/127—The tensile members being made of fiber reinforced plastics
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
    • E04G2023/0262—Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off

Definitions

  • the invention relates to an anchoring device for tension members, in particular for Tension members made of fiber-reinforced plastic, with an anchoring body, through which the tension member is guided, and with at least two anchor wedges around the Tension member are arranged and with the help of the tension member in the anchor body is set, at least one protective element being provided between the anchor wedges and the tension member is arranged so that the force input done on the tension member indirectly via the protective element, and with the protective element in contact surfaces of the anchor wedges and / or surface of the protective element with recesses in contact with the anchor wedges is provided.
  • the tension member is guided through a sleeve or at the end provided with a sleeve.
  • the sleeve is then covered with a binder such as Example with resin, potted so that the tension member is fixed in the sleeve.
  • This Potting requires precise work and is very complex overall, so that Use of such potting anchors as a rule on construction sites is not economical.
  • clamping anchors In the case of clamping anchors, the tension member is guided through an anchoring body and fixed there using at least two anchor wedges, which are usually be arranged symmetrically around the tension member. The tension member is transverse to Longitudinal pressed. The resulting friction enables the pretension required force transmission into the tension member.
  • Clamp anchorages have that The advantage that they can be installed relatively easily at any point on a tension member are.
  • clamping anchors are only suitable to a limited extent for certain tension members. Particularly in the case of tension members that are highly sensitive to transverse pressure, i.e. tension members, which have an anisotropic material behavior, can in the range of Clamping anchorage occurring shear stress peaks to break, i.e. to tear off of the tension member. The possibilities of force application or load transfer are very limited here. Especially under dynamic load the efficiency of clamping anchors in such tension members is therefore relative bad.
  • tension members are here fiber-reinforced plastics - in particular from carbon fiber-reinforced plastics (CFK) - called.
  • CFRK carbon fiber-reinforced plastics
  • Such tension members are used, for example, as reinforcement elements used in concrete construction. The prestressing of the tension members or reinforcement elements leads here to an improved load-bearing behavior of the concrete component under working load.
  • the known anchoring device has an anchoring body through which the tension member is guided is, and two anchor wedges, which are arranged around the tension member and with their Help the tension member in the anchor body is fixed. Between the anchor wedges and the tension member is provided with a protective element. The one with the protective element surfaces of the anchor wedges in contact point at regular intervals trained recesses.
  • the anchoring device has an anchoring body through which the tension member is guided, and two anchor wedges arranged around the tension member become. Furthermore, there is a protective element between the anchor wedges and the tension member intended.
  • An anchoring device for tension members is also known from DE-A-25 15 423.
  • the anchoring device has an anchoring body through which the Tension member is guided, and two anchor wedges arranged around the tension member become.
  • a protective element is provided between the anchor wedges and the tension member.
  • DE 12 78 718 B describes an anchoring device for tension members with an anchoring body through which the tension member is guided, and with two anchor wedges are known, which are arranged around the tension member. Between Anchor wedges and the tension member, a protective element is arranged.
  • the invention is based on the object of an anchoring device in Specify the type in question, in which the shear stress peaks caused by the Cross pressure on the tension member arise, are reduced.
  • the anchoring device according to the invention achieves the above object by the features of claim 1. Thereafter, the aforementioned Anchoring device designed so that the density of the recesses in Direction of the loaded end of the tension member becomes larger.
  • the surface area of the protective element is reduced.
  • the arrangement and distribution of the recesses can be carried out on the tension member Control the lateral pressure of the thickness and the location. In addition, the the frictional forces caused by the transverse pressure are evened out.
  • the tension member should be as free as possible of shear stresses on the load side, since Shear stress peaks can cause the tension member to break here. Therefore the tension member can be tackled more strongly at the unloaded end. Now take that Density of the recesses in the direction of the loaded end of the tension member, so the contact surface and thus the contact pressure in the direction of the loaded In the end diminished. The contact pressure is smeared over the protective element and shifted towards the unloaded end of the tension member.
  • the protective element essentially depends on the type of tension member used.
  • the protective element could advantageously be in shape be formed a sleeve through which the strand-shaped tension member is guided.
  • this sleeve must be the tension member enclose as positively as possible.
  • the sleeve could be made from a deformable Material such as B. sheet, be made and have a slot.
  • Such one Sleeve could be used for assembly and adaptation to stranded tension members with different Diameter simply bent apart or pressed together become.
  • Tension members made of fiber-reinforced plastics are often in the form of strips or Slats in front.
  • An inventive designed for such band-shaped tension members Anchoring device comprises at least two plate-shaped protective elements, those on the two main surfaces of the band-shaped tension member be arranged opposite. The areal dimensioning of the plate-shaped Protective elements should be matched to the width of the band-shaped tension member become.
  • the shape of the recesses in the surface of the protective element plays a role in the Achievement of the desired effect only a subordinate role. So are punctiform Recesses are just as suitable as flat recesses. For manufacturing reasons have oriented themselves essentially perpendicular to the tension member Grooves in the surface of the anchor wedges and / or in the surface of the protective element proven to be advantageous.
  • the effect sought with the use of a protective element is then special well if the protective element is made of a material with a low modulus of elasticity, such as aluminum or copper.
  • a sliding layer is provided for the anchor wedges.
  • This sliding layer forms a defined one Sliding surface between the anchor wedges and the anchor body. A glide between the anchor wedges and the protective element and between the protective element and the tension member is at least largely avoided.
  • the sliding layer could advantageously be implemented in the form of a Teflon film.
  • an anchoring device 1 for a tension member 2 is shown, the one Anchoring body 3 comprises, through which the tension member 2 is guided.
  • the anchoring device 1 further comprises two anchor wedges 4, with the aid of which the tension member 2 is fixed in the anchoring body 3.
  • the tension member 2 in the embodiment shown here is a CFRP slat, i.e. around a band-shaped tension member 2 made of a carbon fiber reinforced Plastic. Accordingly, the anchoring device 1 also only two anchor wedges 4, which are symmetrical about the tension member 2, namely against the are arranged two main surfaces of the tension member 2.
  • the anchoring device 1 additionally comprises two protective elements 5, each arranged between the anchor wedges 4 and the tension member 2 are, so that the force input to the tension member 2 indirectly via the protective elements 5 is done.
  • the two protective elements 5 are protective plates that are directly on the two main surfaces of the tension member 2, arranged opposite each other are.
  • the surfaces of the anchor wedges 4 that are in contact with the protective elements 5 are provided with recesses 6, which is shown particularly clearly in FIG. 2 is, however, the increase in the density of the recesses 6 in the direction of the loaded end of the tension member 2 is not shown.
  • the grooves 6 only serve to reduce the contact surface the anchor wedges 4. Due to a non-uniform distribution of recesses There may be a non-uniform distribution in the surface of the anchor wedges the contact pressure can be achieved, which is particularly advantageous if one the ends, usually the loaded end of the tension member as free of shear stress as possible should be.
  • the protective plates 5 are made of one material Made with a low modulus of elasticity, namely made of aluminum, for example or copper.
  • sliding layer 7 on the surface of the anchor wedges facing away from the tension member 2 4 provided.
  • These sliding layers 7 are realized in the form of Teflon foils.
  • the sliding layers 7 facilitate the assembly of the anchoring device 1 in that as they represent defined sliding surfaces that cause the arrangement of the anchor wedges to slip 4 and protective plates 5 around the tension member 2 when inserted into the anchoring body 3 prevent.
  • the construction of a Anchoring device with anchoring body, anchor wedges and at least one Protection element high efficiency for both static and dynamic Loads reached.
  • the anchoring device according to the invention mount easily on the tension member. The tension members can simply transported on rolls to the construction site, cut to length on site and only then be provided with an anchoring device.
  • anchoring device proposed according to the invention is entirely especially for anchoring and prestressing tendons made of fiber-reinforced Plastics and especially tapes made of carbon fiber reinforced Suitable plastics, it can also in connection with others, for example strand-shaped Tension members made of other materials are used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Piles And Underground Anchors (AREA)
  • Heat Treatment Of Articles (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Joining Of Building Structures In Genera (AREA)

Claims (9)

  1. Dispositif d'ancrage (1) pour des tirants (2), en particulier pour des tirants en matière synthétique renforcée par des fibres, avec un corps d'ancrage (3), dans lequel le tirant est guidé, et avec au moins deux cales d'ancrage (4) qui sont disposées autour du tirant (2) et à l'aide desquelles le tirant est fixé dans le corps d'ancrage (3), au moins un élément de protection (5) étant prévu qui est disposé entre les cales d'ancrage (4) et le tirant (2) de telle manière que l'introduction de force sur le tirant (2) se produit indirectement par l'intermédiaire de l'élément de protection (5), et les surfaces des cales d'ancrage (4) qui se trouvent en contact avec l'élément de protection (5) et/ou la surface de l'élément de protection (5) qui se trouve en contact avec les cales d'ancrage (5) sont munies d'évidements (6),
    caractérisé par le fait que la densité des évidements (6) augmente en direction de l'extrémité chargée du tirant (2).
  2. Dispositif d'ancrage pour un tirant en forme de cordon selon la revendication 1,
    caractérisé par le fait que l'élément de protection est réalisé en forme de douille.
  3. Dispositif d'ancrage selon la revendication 2,
    caractérisé par le fait que la douille est fendue.
  4. Dispositif d'ancrage (1) pour un tirant (2) en forme de bande selon la revendication 1 ou 2,
    caractérisé par le fait qu'au moins deux éléments de protection (5) en forme de plaque sont prévus.
  5. Dispositif d'ancrage (1) selon l'une des revendications 1 à 4,
    caractérisé par le fait que les évidements (6) sont réalisés sous forme de rainures (6) orientées essentiellement orthogonalement au tirant (2).
  6. Dispositif d'ancrage (1) selon l'une des revendications 1 à 4,
    caractérisé par le fait que l'élément de protection (5) est fabriqué en un matériau ayant un faible module d'élasticité.
  7. Dispositif d'ancrage (1) selon la revendication 6,
    caractérisé par le fait que l'élément de protection (5) est fabriqué en aluminium ou en cuivre.
  8. Dispositif d'ancrage (1) selon l'une des revendications 1 à 6,
    caractérisé par le fait qu'une couche de glissement (7) est disposée sur la surface des cales d'ancrage (4) écartée du tirant (2).
  9. Dispositif d'ancrage (1) selon la revendication 8,
    caractérisé par le fait que la couche de glissement (7) est réalisée sous forme d'une feuille de téflon.
EP99106872A 1998-04-08 1999-04-07 Dispositif d'ancrage pour tirants Expired - Lifetime EP0949389B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03023075A EP1380705B1 (fr) 1998-04-08 1999-04-07 Utilisation d'un dispositif d'ancrage pour tirants

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19815823 1998-04-08
DE19815823A DE19815823C2 (de) 1998-04-08 1998-04-08 Verankerungsvorrichtung für Zugglieder

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP03023075.9 Division-Into 2003-10-14

Publications (2)

Publication Number Publication Date
EP0949389A1 EP0949389A1 (fr) 1999-10-13
EP0949389B1 true EP0949389B1 (fr) 2004-06-16

Family

ID=7864042

Family Applications (2)

Application Number Title Priority Date Filing Date
EP99106872A Expired - Lifetime EP0949389B1 (fr) 1998-04-08 1999-04-07 Dispositif d'ancrage pour tirants
EP03023075A Expired - Lifetime EP1380705B1 (fr) 1998-04-08 1999-04-07 Utilisation d'un dispositif d'ancrage pour tirants

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP03023075A Expired - Lifetime EP1380705B1 (fr) 1998-04-08 1999-04-07 Utilisation d'un dispositif d'ancrage pour tirants

Country Status (3)

Country Link
EP (2) EP0949389B1 (fr)
AT (2) ATE279608T1 (fr)
DE (3) DE19815823C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8327506B2 (en) 2007-01-09 2012-12-11 Wireco Worldgroup Inc. Socketing material and speltered assembly for terminating tension member
DE102013225124A1 (de) 2012-12-18 2014-06-18 Wobben Properties Gmbh Anker, Spannvorrichtung, Windenergieanlage und Verfahren zum Zugspannen von Zugsträngen an einem Anker

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080279622A1 (en) * 2003-10-03 2008-11-13 University Of Waterloo Tension Anchorage System
AT412564B (de) * 2003-12-22 2005-04-25 Burtscher Stefan L Dipl Ing Dr Keilverankerung für vorgespannte und/oder belastete zugelemente
CN102482845B (zh) * 2009-08-12 2014-11-12 东京制纲株式会社 用于纤维增强塑料线绳体的端部锚固结构及方法
CN101929221A (zh) * 2010-02-10 2010-12-29 山东省建筑科学研究院 纤维增强塑料片材用主动式锚夹具
EP2420622A1 (fr) 2010-08-18 2012-02-22 Sika Technology AG Dispositif d'introduction de force dans des éléments de traction à partir de lamelles de bandes plates en matière synthétique renforcées en fibres
CN101967867A (zh) * 2010-10-27 2011-02-09 西南交通大学 通用型碳纤维筋夹片式锚具
EP2447446A1 (fr) * 2010-10-28 2012-05-02 Sika Technology AG Ancrage terminal d'éléments de traction sur des supports en béton armé
EP2631392A1 (fr) * 2012-02-21 2013-08-28 Sika Technology AG Dispositif d'introduction de force dans des éléments de traction à partir de lamelles de bandes plates en matière synthétique renforcées en fibres
EP4520869B1 (fr) * 2023-09-06 2025-12-31 Marti AG Bern Système de tête d'ancrage
US12054947B1 (en) * 2024-01-08 2024-08-06 King Faisal University Multi-layer wedge anchorage for FRP plates and FRP tendons

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
US2009318A (en) * 1929-10-29 1935-07-23 Highfield John Somerville Method of joining together or anchoring wire cables and apparatus therefor
US2357733A (en) * 1942-02-03 1944-09-05 Columbus Mckinnon Chain Corp Anchor for flexible cables and a method of securing the same thereto
US2441304A (en) * 1947-10-13 1948-05-11 Maxwell A West Cable clamp
DE1278718B (de) * 1962-06-30 1968-09-26 Rudolf Buehrer Vorrichtung zum Greifen und Verankern eines walzprofilierten Spannstabs, insbesondere eines Stabs mit Schraegrippen
DE6601081U (de) * 1966-03-23 1969-04-03 Rehm G Vorrichtung zur verankerung von stahlstaeben bzw. stahldraehten u. dgl. mit profilierter oberflaeche
GB1434716A (en) * 1972-08-02 1976-05-05 Ccl Systems Ltd Wedge type anchorage devices
AT328156B (de) * 1974-04-26 1976-03-10 Felten & Guilleaume Ag Oester Verankerungsvorrichtung fur verbundstrange aus einem kunststoffkorper und in diesen eingebetteten insbesondere parallelen drahten
US4367568A (en) * 1980-05-24 1983-01-11 Strabag Bau-Ag Anchorage devices for a tension wire bundle of tension wires
JPS58102845A (ja) * 1981-12-14 1983-06-18 Mitsubishi Heavy Ind Ltd ワイヤ−ロ−プのグリツプ装置
DD214419A1 (de) * 1983-03-10 1984-10-10 Verkehrswesen Hochschule Kerbwirkungsarme zentrische seilendbefestigung
FR2562927B1 (fr) * 1984-04-12 1988-03-18 Guinet Derriaz Dalle de pierre a armature de precontrainte et procede pour sa fabrication
DE3438355A1 (de) * 1984-10-19 1986-04-24 Philipp Holzmann Ag, 6000 Frankfurt Keilverankerung fuer spanndrahtlitzen
FR2708017B1 (fr) * 1993-07-21 1995-09-22 Freyssinet Int Stup Perfectionnements aux mors tronconiques d'ancrage pour câbles et à leurs procédés de mise en Óoeuvre.
DE19730174C2 (de) * 1997-07-15 2001-12-06 Bilfinger Berger Bau Bauteil

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8327506B2 (en) 2007-01-09 2012-12-11 Wireco Worldgroup Inc. Socketing material and speltered assembly for terminating tension member
DE102013225124A1 (de) 2012-12-18 2014-06-18 Wobben Properties Gmbh Anker, Spannvorrichtung, Windenergieanlage und Verfahren zum Zugspannen von Zugsträngen an einem Anker
WO2014095330A1 (fr) 2012-12-18 2014-06-26 Wobben Properties Gmbh Boulon d'ancrage, dispositif tendeur, éolienne et procédé pour tendre des éléments de traction à un boulon d'ancrage
US9677275B2 (en) 2012-12-18 2017-06-13 Wobben Properties Gmbh Anchor, tensioning device, wind energy plant and method for tensioning tensile cords on an anchor

Also Published As

Publication number Publication date
DE59909716D1 (de) 2004-07-22
DE59910866D1 (de) 2004-11-18
EP0949389A1 (fr) 1999-10-13
DE19815823A1 (de) 1999-10-21
EP1380705A3 (fr) 2004-01-28
EP1380705B1 (fr) 2004-10-13
ATE279608T1 (de) 2004-10-15
EP1380705A2 (fr) 2004-01-14
DE19815823C2 (de) 2000-11-30
ATE269462T1 (de) 2004-07-15

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