EP0122197A2 - Verankerungsvorrichtungen für eingefettete Spannglieder - Google Patents

Verankerungsvorrichtungen für eingefettete Spannglieder Download PDF

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Publication number
EP0122197A2
EP0122197A2 EP84400676A EP84400676A EP0122197A2 EP 0122197 A2 EP0122197 A2 EP 0122197A2 EP 84400676 A EP84400676 A EP 84400676A EP 84400676 A EP84400676 A EP 84400676A EP 0122197 A2 EP0122197 A2 EP 0122197A2
Authority
EP
European Patent Office
Prior art keywords
cover
face
anchoring device
skirt
bowl
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.)
Withdrawn
Application number
EP84400676A
Other languages
English (en)
French (fr)
Other versions
EP0122197A3 (de
Inventor
Daniel Thomarat
Bernard Amelot
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.)
Freyssinet International STUP SA
Original Assignee
Freyssinet International STUP SA
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 Freyssinet International STUP SA filed Critical Freyssinet International STUP SA
Publication of EP0122197A2 publication Critical patent/EP0122197A2/de
Publication of EP0122197A3 publication Critical patent/EP0122197A3/de
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to anchoring devices intended to retain the ends of reinforcement under tension and. intended to ensure the prestressing of concrete elements: these reinforcements being contained in sheaths filled with grease and preferably being constituted by a strand.
  • the larger diameter end of said housing, the smaller diameter end of this housing being itself tightly connected to the corresponding end of the sheath, in particular by means of a plastic funnel.
  • the cover is a part having a high mechanical resistance, generally made of metal, the base of which is screwed with the interposition of an annular seal on a complementary threaded collar of the plate.
  • the invention aims, above all, to overcome these drawbacks.
  • the invention includes, apart from these main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below.
  • the frame considered here intended to subject a concrete element or structure 1 to prestress by being tensioned between its two ends, is constituted by a strand 2 itself composed of wires 3 (FIG. 2) wound around a central wire 4 of slightly larger diameter.
  • this strand is itself enveloped by a sheath 5 made of plastic, for example polyethylene, and the volumes between this sheath and the constituent wires of the strand are filled with grease.
  • Such a cladding and such a lubrication have the double advantage of making possible the relative sliding of the frame relative to the sheath, after pouring the concrete around the latter, which facilitates the tensioning of said frame, and of protecting this reinforcement against corrosion, caused in particular by the action of humidity.
  • the anchoring device intended to retain one of the ends of the strand 2 comprises a metal plate 6, in particular. made of cast iron, thickened in its center and pierced in this center by a frustoconical housing 7.
  • This housing 7 is suitable for receiving the reinforcement end in question surrounded by a set of three jaws 8 forming a ring split longitudinally at 9: each of these jaws extends substantially over 120 ° around the axis common to the strand 2 and the housing 7 and has a cylindrical inner face adapted to match the strand and a frustoconical outer face complementary to the housing.
  • the edge of the mouth of small diameter of the frustoconical housing 7, or more precisely that of a cylindrical flange 10 axially extending this mouth, is connected in a relatively sealed manner to the end of the sheath 5 -: which sheath is interrupted by below the end of the frame 2 to allow the grips of the jaws 8 on this frame - by a suitable funnel 11 made of plastic material, a cylindrical end of which is force fitted onto said flange.
  • a notch 20 interrupts one of the three ribs 18 at an angle of the order of 30 °.
  • a cover 21 made of a slightly deformable plastic material such as polypropylene, molded, in particular by injection.
  • the terminal thinning in question corresponds to a removal of the thickness of the skirt inside of it and not outside.
  • the thickness of this thinned edge 25 is advantageously between 0.4 and 0.6 mm.
  • Each locking pin. 27 is here delimited laterally by two plane faces 29 parallel to the axis of the assembly and externally by a projecting dihedral at an acute angle comprising, on the side of the top of the cover, a plane face 30 perpendicular to this axis. and, on the other side, a face 31 slightly inclined on said axis.
  • the inclination in question is substantially equal to that of the frustoconical face 16 of the bowl.
  • each lug 27 is less than that of the intervals 19.
  • the axial distance between the transverse faces 30 of said lugs and the end edge of the skirt 24 is substantially equal to the axial distance between the flat bottom of the bowl 12 and the face of each rib 18, facing this bottom.
  • the coding lug 28 was in the form of a prismatic pad of generatrices parallel to the axis of the assembly and of semi-circular or rectangular director.
  • This lug is provided so as to be able to penetrate axially into the notch 20 and to come into angular abutment against the angular ends of this notch in order to determine the limit switches of the assembly.
  • Two ears 32 molded with the cover protrude from its neck 23 and facilitate manual control of its angular movements.
  • the thinned edge 25 of the skirt 24 comes into contact with the curved surface 14 of the bottom of the bowl.
  • the cover is then rotated in the screwing direction., Which angularly penetrates the pins 27 in the grooves in an arc defined between the ribs 18 and the frustoconical surface 16 of the bowl.
  • the cover 21 is then fixed in an extremely solid and rigorously tight manner on the bowl 12.
  • This device has clear advantages over those previously known, in particular as regards the low price and the simplicity of the assembly, which no longer requires the use of a seal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Sealing Devices (AREA)
  • Adornments (AREA)
  • Reinforcement Elements For Buildings (AREA)
EP84400676A 1983-04-06 1984-04-05 Verankerungsvorrichtungen für eingefettete Spannglieder Withdrawn EP0122197A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8305612A FR2543996B1 (fr) 1983-04-06 1983-04-06 Perfectionnements aux dispositifs d'ancrage pour armatures de precontrainte graissees
FR8305612 1983-04-06

Publications (2)

Publication Number Publication Date
EP0122197A2 true EP0122197A2 (de) 1984-10-17
EP0122197A3 EP0122197A3 (de) 1985-07-10

Family

ID=9287570

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400676A Withdrawn EP0122197A3 (de) 1983-04-06 1984-04-05 Verankerungsvorrichtungen für eingefettete Spannglieder

Country Status (2)

Country Link
EP (1) EP0122197A3 (de)
FR (1) FR2543996B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6138041A (ja) * 1984-07-25 1986-02-24 フレシネ　アンテルナシヨナル（エステ−ウ−ペ−） グリ−スをかぶつたプレストレス補強材用定着装置
US4616458A (en) * 1985-07-01 1986-10-14 Vsl Corporation Protective apparatus for tendons in tendon tensioning anchor assemblies
US6023894A (en) * 1998-01-15 2000-02-15 Sorkin; Felix L. Anchor of a post-tension anchorage system with an improved cap connection

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1216923A (en) * 1968-04-24 1970-12-23 Ccl Systems Ltd Improvements in or relating to anchorage assemblies for the prestressing of concrete structures
DE1917370A1 (de) * 1969-04-03 1970-11-19 Sager & Woerner Anordnung zum Schutze von Spanngliederverankerungen
DE8002045U1 (de) * 1980-01-26 1980-04-30 Dyckerhoff & Widmann Ag, 8000 Muenchen Wiedergewinnbares schalungsteil fuer den verankerungsbereich eines spannglieds in einem betonbauteil
US4348844A (en) * 1980-09-25 1982-09-14 Morris Schupack Electrically isolated reinforcing tendon assembly and method
FR2492870A1 (fr) * 1980-10-27 1982-04-30 Precontrainte Structures Ste F Tete d'ancrage de cable pour ouvrage en beton precontraint

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6138041A (ja) * 1984-07-25 1986-02-24 フレシネ　アンテルナシヨナル（エステ−ウ−ペ−） グリ−スをかぶつたプレストレス補強材用定着装置
US4616458A (en) * 1985-07-01 1986-10-14 Vsl Corporation Protective apparatus for tendons in tendon tensioning anchor assemblies
US6023894A (en) * 1998-01-15 2000-02-15 Sorkin; Felix L. Anchor of a post-tension anchorage system with an improved cap connection

Also Published As

Publication number Publication date
FR2543996A1 (fr) 1984-10-12
EP0122197A3 (de) 1985-07-10
FR2543996B1 (fr) 1985-11-15

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Effective date: 19870525

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18D Application deemed to be withdrawn

Effective date: 19871006

RIN1 Information on inventor provided before grant (corrected)

Inventor name: AMELOT, BERNARD

Inventor name: THOMARAT, DANIEL