EP1259679A1 - Ancrage pour element de traction precontraint et/ou charge et boite d'ancrage - Google Patents

Ancrage pour element de traction precontraint et/ou charge et boite d'ancrage

Info

Publication number
EP1259679A1
EP1259679A1 EP01907227A EP01907227A EP1259679A1 EP 1259679 A1 EP1259679 A1 EP 1259679A1 EP 01907227 A EP01907227 A EP 01907227A EP 01907227 A EP01907227 A EP 01907227A EP 1259679 A1 EP1259679 A1 EP 1259679A1
Authority
EP
European Patent Office
Prior art keywords
anchor
load
bushing
anchoring
anchor body
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
Application number
EP01907227A
Other languages
German (de)
English (en)
Other versions
EP1259679B1 (fr
Inventor
Johann Kollegger
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1259679A1 publication Critical patent/EP1259679A1/fr
Application granted granted Critical
Publication of EP1259679B1 publication Critical patent/EP1259679B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • 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

Definitions

  • the subject of the invention is an anchoring for a prestressed or loaded tensile element made of fiber composite material and an anchor bushing
  • tensile elements made of fiber composite materials have superior corrosion resistance to weather-related stresses and a lower weight
  • Tension elements made of fiber composite material generally consist of fibers that are arranged parallel to each other along the length of the tension elements and are, for example, embedded in a reaction resin matrix. Common fibers are built up with carbon, inorganic glass or aramid. Epoxy resins, unsaturated polyester resins, vinyl ester resins are used for the matrix , but also polymers with or without fillers are used
  • the fibers have both an elastic and brittle material behavior.
  • the matrix of the fiber composite causes the forces to be compared and the transfer of force from broken to intact fibers. In addition, the matrix reduces the lateral pressure of the fibers
  • Tension elements made of fiber composite material are made by pultrusion. Mainly circular wires and rods as well as strands of individual fibers are produced in cross-section.
  • a tension element can consist of several tension elements and a hollow tube to protect against water ingress and UV radiation
  • Tension elements made of non-metallic fiber composite material are mechanically anisotropic. Excellent material properties, such as high tensile strength and rigidity in the longitudinal direction, are opposed to many times lower strengths in the transverse direction
  • the tensile force is transmitted from the tension element to the clamping plates via frictional composite stresses.
  • the contact pressure of the clamping plates can be taken into account, taking into account the transverse pressure sensitivity of the tension elements.
  • Te made of non-metallic fiber composite material are set so that the contact pressure in the part of the anchor near the load is lower than in the part away from the load Failure of the anchoring under dynamic loading Due to the complex anchoring technology and the risk of premature failure under dynamic loading, it can be expected that anchoring anchors will no longer be used
  • a cylindrical casting anchor as a clamping sleeve anchor is described by Rostasy in the journal Bauingenieur, volume 73, page 301.
  • this anchor the tensile element made of fiber composite material is anchored in a steel sleeve with a casting material by adhesive bond and wedges.
  • This anchor causes a strong decrease in the Tractive force in the area of the wedge anchoring, since higher shear stresses are transmitted by the transverse pressure. Even transmission of the tractive force from the traction element into the anchoring is not possible with the clamping sleeve anchoring despite its elaborate design
  • the lateral pressure in conical encapsulation anchors in which the smallest cross-sectional area of the cavity is close to the load and thus the imaginary tip of the cone is arranged close to the load, increases the absorbable shear stress between the tension element and anchor body, but can also lead to early destruction of the tension element in the anchorage, as fiber composite materials are sensitive to lateral pressure
  • WO 95/29308 describes a conical casting anchor for non-metallic tensile elements made of fiber composite material, which has an anchor bushing with a conical cavity, the smallest cross-sectional area near the load and the largest cross-sectional area near the load, and an intermediate Anchor sleeve and tension elements arranged from an encapsulation body comprises a casting compound.
  • the encapsulation compound of the anchor body has different modulus of elasticity along its longitudinal extension. When the tension element enters the anchorage, the modulus of elasticity of the encapsulation compound is low and increases continuously to the part of the anchorage away from the load. With this graded design of the anchor body a more even power transmission from the tension element to the anchor bushing is to be achieved.
  • the production of a potting material in several layers is a complex process
  • the object of the present invention is to provide an anchoring for one or more tension elements made of non-metallic fiber composite material, which is simple to manufacture and allows a more uniform transmission of force along the tension element to the anchor bushing and enables a high level of durability under dynamic loads
  • the anchoring according to the invention for a prestressed and / or loaded tensile element made of a, in particular non-metallic, fiber composite material the tensile force of the tensile element via an anchor body made of hardened, in particular hardened, potting material onto an anchor bushing, which has different cross-sectional areas normal to the axis of the tension element, can be transferred, consists essentially in the fact that the inner wall of the anchor bush has a profile, and that the cross-sectional area of the anchor body is normal to the axis of the tension element in the near-load direction
  • Part of the armature bush is larger, in particular has a maximum value, and is smaller in the part remote from the load
  • Fiber composite materials usually consist of non-metal 1- see fibers, such as glass, carbon, aramid or others
  • Plastics that have a particularly high level of corrosion resistance to atmospheric stress. This allows tensile members with anchoring of the type used for structures such as bridges, high-rise structures, but also earth or rock anchors
  • the non-metallic fiber composite materials can have a particularly high tensile strength, but the strength is particularly low in the case of transverse loads. To take this into account, the tensile elements are fixed in an anchor bush with a
  • the anchor bush has at least two anchor bodies for receiving the tension elements, a particularly high mechanical anchoring of the tension elements in the anchor bush can be achieved
  • the end of the anchor bushing remote from the load consists of a plate and has the same at least one load-absorbing element which is oriented parallel, in particular parallel, to the tension element (s), an anchor bushing which is particularly capable of absorbing force can be obtained
  • the tensile strength of the solidified, in particular hardened, potting material of the anchor body is, in particular considerably, lower than the compressive strength, it can be achieved that cracks occur in the anchor body which lead to
  • the wall thickness in the part of the anchor bush close to the load is lower than in the part remote from the load, and the anchor bush is graded in such a way that when the tensile force is transmitted from the tension element via the anchor body to the anchor bush, the stress on the tension element upon entry into the anchor body due to the resilience in part of the anchor bush close to the load is reduced, so there is a particularly favorable balancing of the forces between the anchor bush and the anchor body and thus the
  • the anchor body is cylindrical in shape in the part of the anchor bushing remote from the load, a particularly long anchor body can be obtained, which is particularly favorable for the adjustability
  • the hardened, in particular hardened, potting material can be loaded by a, in particular variable, tensile force in such a way that it creeps, a more uniform transmission of force from the tensile element via the potting material to the anchor bushing can be achieved by the permanent deformation of the potting material
  • the hardened, in particular hardened, potting material can be loaded at elevated temperature by a tensile force that acts, in particular variable, over a longer period of time, then a more uniform transmission of the forces from the tensile element can be achieved can be reached on the anchor bushing via the casting compound, which has been subjected to permanent deformation
  • the anchor bushing according to the invention with at least one cavity with wall, which is open at at least one end, the cross-sectional area of the cavity varying normal to the longitudinal direction of the same, consists essentially in that the wall has a profile that is transverse, in particular normal , stretched to the longitudinal direction of the cavity
  • the wall has a profile that extends transversely, in particular normally, to the longitudinal direction of the cavity, it can be achieved that this profile provides a mechanical anchoring of the tension elements via the casting compound
  • the cavity can be filled particularly easily with the flowable mass, which solidifies or hardens
  • the anchor bush is closed at one end, this end having reduced cross-sectional areas of the cavity, then particularly high strengths for the anchor bush are ensures, whereby a smaller dimensioning of the same is possible with the same force absorption
  • Anchor body and the anchor bush allows
  • FIG. 3 shows a longitudinal section of a second embodiment of the anchoring according to the invention
  • FIG. 4 shows a longitudinal section of a third embodiment of the anchoring according to the invention
  • FIG. 5 shows a longitudinal section of a fourth embodiment of the anchoring according to the invention
  • FIG. 6 shows a longitudinal section of a fifth embodiment of the anchoring according to the invention
  • 7 shows a cross section along the line VII-VII in FIG. 6,
  • FIG. 8 shows a longitudinal section of a sixth embodiment of the anchoring according to the invention
  • FIG. 10 shows a longitudinal section of a seventh embodiment of the anchoring according to the invention.
  • FIG. 11 shows a cross section along the line XI-XI in FIG. 10
  • FIG. 1 A longitudinal section through a first embodiment of an anchoring according to the invention is shown in FIG. 1
  • the anchor bushing 4 is made of steel and was produced using milling tools. However, those made of fiber composite materials can also be used.
  • the anchoring shown in FIG. 1 is threaded on the outside
  • the anchor body 6 consists of a hardened potting material 3
  • the potting material are epoxy resins, Dywipox (registered trademark of Dyckerhoff Systems
  • Tension element 2 and the anchor body 6 is required in order to transmit the tensile force from the tension member 1 to the anchor body 6 with only one tension element 2.
  • the tension member is made of carbon fibers with a diameter of 10 ⁇ m, which is made of epoxy resins
  • the anchor body 6 of the anchoring shown in FIG. 1 has the shape of a truncated cone. In a cross section through the part 41 of the anchor near to the load according to FIG. 2, the anchor body 6 has a larger cross-sectional area than in a cross section in the part 42 away from the load Shape of the anchor body 6 is achieved that the composite stresses between the tension element 2 and anchor body 6 are distributed more evenly than in a cylindrical or conical casting anchor of conventional type
  • the anchor bushing 4 serves as a form for the manufacture of the anchor body 6.
  • the inner wall 44 of the anchor bushing 4 must be such that the anchor body 6 is not pulled out of the anchor bushing 4 when the tension element 2 is loaded. A suitable machining of the inner wall 44 of the anchor bushing
  • FIG. 3 shows a longitudinal section of the anchoring according to the invention according to FIG. 1 in a modified embodiment.
  • the inner wall 44 of the anchor bushing 4 is also shown
  • Steps 46 are provided, on which the anchor body 6 is supported when the tension element 2 is loaded.
  • a suitable shaping of the steps 46 with respect to the distance and inclination to the tension element 2 can influence the shear stress curve along the tension element 2.
  • several truncated cone-shaped configurations can also be achieved. close to the load have a smaller cross section than remote from the load, so that em mechanical clamping of the tension member in the anchor body is achieved
  • FIG. 4 shows a longitudinal section of the anchoring according to the invention according to FIG. 1 in a modified embodiment.
  • the area of the anchor body 6 normal to the tension element 2 increases steadily in the part of the anchor 41 near the load and is constant in the part 42 remote from the load.
  • This anchoring thus represents an extension of the known cylindrical casting anchors.
  • Anchoring shown has a profile 45 of the inner wall 44 and releases the force on an anchor plate 60
  • FIG. 5 shows a longitudinal section of the anchoring according to the invention according to FIG. 1 in a modified embodiment.
  • the inner wall 44 of the anchor bushing 4 has only one step 46, which absorbs a substantial part of the force. The remaining part of the force is transmitted via the anchor body 6 on the profiling 45 of the inner wall 44 of the
  • FIG. 6 a longitudinal section of the anchoring according to the invention according to FIG. 1 is shown in a modified form.
  • the tension member 1 consists of three tension elements 2
  • the tension member 1 consists of three tension elements 2 made of fiber composite material. Each tension element 2 is embedded in a conical anchor body 6.
  • the anchor bodies 6 are 8 parallel to the axis of the tension member 1 A section along the line IX-IX through the anchoring is shown in Fig. 9
  • the tension member 1 consists of six tension elements 2 made of fiber composite material.
  • the anchor bushing 4 has a plate 70 at the end remote from the load, to which a load-bearing element 80 has the tension elements 2 the force via composite stresses to the anchor body 6 widened in the part 41 close to the load.
  • the anchor body 6 transmits the tensile force to the inner wall 44 and the load-bearing element 80, which protrudes into the anchor body 6 like a mandrel.
  • E section along the line XI-XI through the Anchoring is shown in Fig
  • the wall can be provided with a separating agent, for example silicone oil, before pouring the liquid potting material into the anchor socket, so that no adhesive bond occurs
  • a separating agent for example silicone oil
  • the shape of the anchor body 6 is not limited to the shapes shown in FIGS. 1 to 11 Cross-sectionally non-circular anchoring bodies 6 are formed, which allow transmission of the tensile force with shear stresses uniformly distributed along the tensile element 2

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Piles And Underground Anchors (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Pens And Brushes (AREA)
  • Reinforcement Elements For Buildings (AREA)
EP01907227A 2000-03-03 2001-02-21 Ancrage pour element de traction precontraint et/ou charge et boite d'ancrage Expired - Lifetime EP1259679B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10010564A DE10010564C1 (de) 2000-03-03 2000-03-03 Verankerung für ein Zugelement aus Faserverbundwerkstoff
DE10010564 2000-03-03
PCT/AT2001/000043 WO2001065023A1 (fr) 2000-03-03 2001-02-21 Ancrage pour element de traction precontraint et/ou charge et boite d'ancrage

Publications (2)

Publication Number Publication Date
EP1259679A1 true EP1259679A1 (fr) 2002-11-27
EP1259679B1 EP1259679B1 (fr) 2006-06-28

Family

ID=7633487

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01907227A Expired - Lifetime EP1259679B1 (fr) 2000-03-03 2001-02-21 Ancrage pour element de traction precontraint et/ou charge et boite d'ancrage

Country Status (5)

Country Link
EP (1) EP1259679B1 (fr)
AT (1) ATE331857T1 (fr)
AU (1) AU2001235228A1 (fr)
DE (2) DE10010564C1 (fr)
WO (1) WO2001065023A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112469873A (zh) * 2018-06-25 2021-03-09 碳连接股份公司 锚套筒和锚系统

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1668202A1 (fr) * 2003-10-03 2006-06-14 University Of Waterloo Systeme d'ancrage en tension
AT412564B (de) * 2003-12-22 2005-04-25 Burtscher Stefan L Dipl Ing Dr Keilverankerung für vorgespannte und/oder belastete zugelemente
DE102004038082B4 (de) * 2004-07-28 2008-02-28 Technische Universität Dresden Verankerung von faserverstärkten Zugstangen
DE102005038541A1 (de) * 2005-08-16 2007-03-01 Kollegger, Johann, Prof. Dr.-Ing. Vorgespannte Flächentragwerke aus Faserbeton und textilbewehrtem Beton
DE102009016693A1 (de) * 2009-04-07 2010-10-14 Thomas Friedrich Ankerhülse für die Verankerung von vorgespannten Bewehrungselementen
DE102010010347A1 (de) * 2010-03-05 2011-09-08 Hermann Weiher Vorrichtung zur Verankerung von Zuggliedern
CN102644242A (zh) * 2011-02-17 2012-08-22 上海方济减震器材有限公司 拉索橡胶减振器齿形锲块
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
DE102014200153B4 (de) 2014-01-08 2022-02-17 Rud Ketten Rieger & Dietz Gmbh U. Co. Kg Zugstange aus faserverstärktem Kunststoff mit um wenigstens einen Flanschkörper herum reichenden Fasern
WO2018081895A1 (fr) * 2016-11-04 2018-05-11 Al Mayah Adil Système d'ancrage de polymères renforcés par des fibres

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099109A (en) * 1958-03-01 1963-07-30 Zueblin Ag Device for anchoring tensioning elements
DE2705483A1 (de) * 1977-02-10 1978-08-17 Bayer Ag Vorrichtung zur verankerung von zuggliedern aus hochfesten werkstoffen
FR2686916A1 (fr) * 1992-01-31 1993-08-06 Sif Entreprise Bachy Dispositif d'ancrage d'un faisceau de joncs fibreux.
AU686782B2 (en) * 1994-04-25 1998-02-12 Eidgenossische Materialprufungs- Und Forschungsanstalt Empa Anchorage device for high-performance fiber composite cables

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0165023A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112469873A (zh) * 2018-06-25 2021-03-09 碳连接股份公司 锚套筒和锚系统

Also Published As

Publication number Publication date
DE10010564C1 (de) 2001-07-05
AU2001235228A1 (en) 2001-09-12
WO2001065023A1 (fr) 2001-09-07
ATE331857T1 (de) 2006-07-15
DE50110337D1 (de) 2006-08-10
EP1259679B1 (fr) 2006-06-28

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