EP0260163B1 - Perfectionnements aux dispositifs d'ancrage des armatures tendues - Google Patents

Perfectionnements aux dispositifs d'ancrage des armatures tendues Download PDF

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Publication number
EP0260163B1
EP0260163B1 EP87401741A EP87401741A EP0260163B1 EP 0260163 B1 EP0260163 B1 EP 0260163B1 EP 87401741 A EP87401741 A EP 87401741A EP 87401741 A EP87401741 A EP 87401741A EP 0260163 B1 EP0260163 B1 EP 0260163B1
Authority
EP
European Patent Office
Prior art keywords
jaw
tapered end
anchoring device
lateral surface
cable
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
Application number
EP87401741A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0260163A1 (fr
Inventor
Pierre Jartoux
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
Priority to AT87401741T priority Critical patent/ATE46555T1/de
Publication of EP0260163A1 publication Critical patent/EP0260163A1/fr
Application granted granted Critical
Publication of EP0260163B1 publication Critical patent/EP0260163B1/fr
Expired 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

Definitions

  • the invention relates to devices for anchoring tensile reinforcements and more particularly to these devices, which comprise a longitudinally split annular jaw having a rough inner cylindrical surface, in particular ridged, and an outer lateral surface of frustoconical appearance, jaw which surrounds one end of the frame to be anchored and which cooperates with a complementary recess recessed in a rigid anchoring part, this housing being dimensioned in such a way that it contiguously surrounds the whole of the tapered end of the jaw.
  • the reinforcements considered by the word cables will be designated, for the purpose of simplification and without any limitation being implied, the reinforcements in question generally being constituted by cables or strands composed of several twisted wires, but which can also be formed differently. , for example by bars.
  • the jaw is practically undeformable and the variations in elongation of the cable result in relative displacements between the rough interior face of the thinnest end of the jaw. and the section of cable surrounded by this end.
  • This wear has the effect of tearing off said section of very small metal particles (generally iron) which oxidize rapidly and swell thereby: then migrating into the grain boundaries of the metallic structure constituting the cable section , these magnified oxide particles exert a wedge effect capable of bursting this structure and therefore of creating cracks in the cable, or even of breaking the latter.
  • very small metal particles generally iron
  • the object of the invention is, above all, to remedy this drawback.
  • the tapered jaws split according to the invention are chosen from those for which the half-angle at the top of the outer lateral surface, of frustoconical shape, of the tapered end is less than 10 ° (see for example the document US-A 3,163,904) and they are characterized in that the radial thickness E of the annular end portion of said tapered end is less than or equal to 1 / 10th of the internal radius R of this end.
  • 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.
  • Figures 1 and 2 of this drawing show respectively in axial section and in cross section along II-II, Figure 1, a cable anchoring device established according to the invention.
  • the cable 1 is here composed of twisted steel wires 2 and the anchoring device comprises a split jaw 3 of frustoconical shape suitable for jointing this cable and introduced into a complementary housing 4 it - even hollowed out in a rigid anchoring plate 5.
  • the split jaw is composed of three identical keys 6 forming by their lateral juxtaposition a ring whose inner surface is cylindrical of revolution and whose outer surface has a frustoconical shape of revolution.
  • the inner cylindrical face of the jaw is roughened by the formation of threads or ridges 7 or by bonding of abrasive grains.
  • the tapered end of the jaw is relatively thick, namely of the order of 2 mm or more as in known embodiments, this end is not deformable.
  • the tapered end of the jaw is given very thinness while intimately joining this end with the cable.
  • the sliding can occur without damage, the faces in contact then being both smooth and no disadvantage resulting from their relative displacements.
  • the great thinness of the tapered end of the jaw is defined as follows.
  • the thickness E of the terminal annular section of this end is at most equal to 1 / 10th of the internal radius R of this section.
  • the thickness E is between 0.5 and 0.8 mm.
  • the half-angle at the apex A of the lateral surface of revolution of frustoconical shape which externally delimits the tapered end of the jaw is less than 10 ° .
  • This half-angle A is preferably of the order of 5.5 ° .
  • said end does not protrude axially from the anchor plate 5: its end edge is on the contrary inside this plate.
  • the keys 6 are not only very thin, but also relatively long: their length L is generally greater than 30 times the thickness E of the terminal section of their tapered end as defined above.
  • the jaw was composed of three identical keys for which the dimensions E, R and L above were respectively 0.7 mm, 8 mm and 45 mm.
  • the outside diameter of the largest base of the jaw was 27 mm and the ridges 7 had a pitch of 0.5 mm and a depth of 0.3 mm.
  • the invention is in no way limited to those of its modes of application and embodiments which have been more especially envisaged; it embraces in particular the variants where the number of slots provided in each jaw, a number determining that of the keys making up the jaw, would be different from three and for example equal to one, two or four.

Landscapes

  • Architecture (AREA)
  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Ropes Or Cables (AREA)
  • Prostheses (AREA)
  • Piles And Underground Anchors (AREA)
  • Bridges Or Land Bridges (AREA)
  • Clamps And Clips (AREA)
  • Cable Accessories (AREA)
  • Vehicle Body Suspensions (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Joining Of Building Structures In Genera (AREA)
EP87401741A 1986-07-31 1987-07-24 Perfectionnements aux dispositifs d'ancrage des armatures tendues Expired EP0260163B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87401741T ATE46555T1 (de) 1986-07-31 1987-07-24 Verankerungsvorrichtung fuer spannbewehrungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8611140A FR2602258B1 (fr) 1986-07-31 1986-07-31 Perfectionnements aux dispositifs d'ancrage des armatures tendues
FR8611140 1986-07-31

Publications (2)

Publication Number Publication Date
EP0260163A1 EP0260163A1 (fr) 1988-03-16
EP0260163B1 true EP0260163B1 (fr) 1989-09-20

Family

ID=9337935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87401741A Expired EP0260163B1 (fr) 1986-07-31 1987-07-24 Perfectionnements aux dispositifs d'ancrage des armatures tendues

Country Status (10)

Country Link
US (1) US4941303A (zh)
EP (1) EP0260163B1 (zh)
JP (1) JPS6343046A (zh)
CN (1) CN1008826B (zh)
AT (1) ATE46555T1 (zh)
DE (1) DE3760589D1 (zh)
ES (1) ES2010712B3 (zh)
FR (1) FR2602258B1 (zh)
GR (1) GR3000161T3 (zh)
TR (1) TR23353A (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.
DK0710313T3 (da) * 1994-04-25 2000-09-25 Empa Forankring for højydelsesfiberkompositmaterialetråde
US7118299B2 (en) * 2001-01-23 2006-10-10 Erico International Corporation Reinforcing bar connection and method
JP4822853B2 (ja) * 2006-01-18 2011-11-24 タマホーム 株式会社 鉄筋係止具
US7765752B2 (en) * 2008-02-20 2010-08-03 Hayes Specialty Machining, Ltd. Anchor system with substantially longitudinally equal wedge compression
AU2010336022B2 (en) * 2009-12-23 2014-08-14 Geotech Pty Ltd An anchorage system
CN104019186A (zh) * 2014-06-11 2014-09-03 无锡通用钢绳有限公司 一种钢丝绳夹紧装置
CN106018416B (zh) * 2015-09-10 2018-08-07 泰州市恒信建设工程质量检测有限公司 桥梁检测装置及其检测方法

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250101B (zh) * 1967-09-14
BE544574A (zh) *
US2180866A (en) * 1938-07-20 1939-11-21 John A Cryer Connector
US2294398A (en) * 1940-12-10 1942-09-01 Ralph M Ferguson Terminal fitting for flexible or semiflexible cable
FR1237901A (fr) * 1959-06-25 1960-08-05 Stup Procedes Freyssinet Perfectionnements aux dispositifs d'ancrage des armatures de précontrainte
GB880224A (en) * 1959-07-27 1961-10-18 P S C Equipment Ltd Improvements in or relating to anchorage devices
GB895519A (en) * 1959-09-10 1962-05-02 P S C Equipment Ltd Improvements in or relating to externally-tapered split sleeves
US3163904A (en) * 1963-06-24 1965-01-05 Supreme Products Corp Strand chucks
BE759109A (fr) * 1969-12-31 1971-04-30 Joslyn Mfg And Supply Cy Raccords d'extremite pour tiges en fibre de verre devant resister a descharges de traction elevees
US3673644A (en) * 1970-07-10 1972-07-04 Howlett Machine Works Tendon anchorage
US3703748A (en) * 1970-08-14 1972-11-28 Kelly Systems Inc Anchor for post-tensioning prestressed concrete
US4144686A (en) * 1971-07-22 1979-03-20 William Gold Metallic beams reinforced by higher strength metals
JPS545990Y2 (zh) * 1972-05-02 1979-03-17
GB1478309A (en) * 1973-08-23 1977-06-29 Ccl Systems Ltd Anchorage assembly for use in the prestressing of concrete structures
DE2550137C3 (de) * 1975-11-07 1979-01-18 Gallus Prof. Dr.-Ing. 8000 Muenchen Rehm Keilverankerung für hochfeste Zugglieder
FR2516573A1 (fr) * 1981-11-17 1983-05-20 Freyssinet Int Stup Ancrage a clavettes pour armature de precontrainte soumise a des efforts frequemment variables
FR2524030A1 (fr) * 1982-03-25 1983-09-30 Precontrainte Ste Fse Tete d'ancrage pour tirant composite precomprime a raccourcissement progressif
DE3224702C2 (de) * 1982-07-02 1986-01-16 Dyckerhoff & Widmann AG, 8000 München Vorrichtung zum Verankern und Koppeln eines Bündelspannglieds für Spannbeton

Also Published As

Publication number Publication date
US4941303A (en) 1990-07-17
CN1008826B (zh) 1990-07-18
TR23353A (tr) 1989-12-19
EP0260163A1 (fr) 1988-03-16
FR2602258B1 (fr) 1988-11-04
GR3000161T3 (en) 1990-12-31
ATE46555T1 (de) 1989-10-15
DE3760589D1 (en) 1989-10-26
ES2010712B3 (es) 1989-12-01
CN87105250A (zh) 1988-02-10
FR2602258A1 (fr) 1988-02-05
JPS6343046A (ja) 1988-02-24

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BE570406A (zh)

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