EP0260163A1 - Verankerungsvorrichtung für Spannbewehrungen - Google Patents
Verankerungsvorrichtung für Spannbewehrungen Download PDFInfo
- Publication number
- EP0260163A1 EP0260163A1 EP87401741A EP87401741A EP0260163A1 EP 0260163 A1 EP0260163 A1 EP 0260163A1 EP 87401741 A EP87401741 A EP 87401741A EP 87401741 A EP87401741 A EP 87401741A EP 0260163 A1 EP0260163 A1 EP 0260163A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jaw
- tapered end
- anchoring device
- lateral surface
- outer lateral
- 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
Links
Images
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 reinforcement 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 shape, 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 ° and they are characterized in that 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 half-angle at the top of the outer lateral surface, of frustoconical shape, of the tapered end of the jaw is of the order of 5 to 6 °
- - the half-angle at the top according to the preceding paragraph decreases and tends towards zero in the direction of the terminal edge of the tapered end
- - the length of the jaw is greater than 30 times the radial thickness E above
- the portion of the internal face of the housing receiving the jaw, which surrounds the tapered end of this jaw and is applied contiguously against this end, is polished
- a lubricant is interposed between the tapered end of the jaw and the opposite face of the housing with which this end cooperates.
- 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 made rough 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 slippages can occur without damage, the faces in contact being then both smooth and no inconvenience 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; on the contrary, it embraces all the variants thereof, in particular those 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)
- Piles And Underground Anchors (AREA)
- Clamps And Clips (AREA)
- Prostheses (AREA)
- Bridges Or Land Bridges (AREA)
- Cable Accessories (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Vehicle Body Suspensions (AREA)
- Joining Of Building Structures In Genera (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
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 true EP0260163A1 (de) | 1988-03-16 |
EP0260163B1 EP0260163B1 (de) | 1989-09-20 |
Family
ID=9337935
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87401741A Expired EP0260163B1 (de) | 1986-07-31 | 1987-07-24 | Verankerungsvorrichtung für Spannbewehrungen |
Country Status (10)
Country | Link |
---|---|
US (1) | US4941303A (de) |
EP (1) | EP0260163B1 (de) |
JP (1) | JPS6343046A (de) |
CN (1) | CN1008826B (de) |
AT (1) | ATE46555T1 (de) |
DE (1) | DE3760589D1 (de) |
ES (1) | ES2010712B3 (de) |
FR (1) | FR2602258B1 (de) |
GR (1) | GR3000161T3 (de) |
TR (1) | TR23353A (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995029308A1 (de) * | 1994-04-25 | 1995-11-02 | Eidgenössische Materialprüfungs- und Forschungsanstalt Empa | Verankerung für hochleistungsfaserverbundwerkstoff-drähte |
Families Citing this family (7)
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. |
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 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
FR2069424A5 (de) * | 1969-12-31 | 1971-09-03 | Joslyn Mfg & Supply Co | |
DE2550137A1 (de) * | 1975-11-07 | 1977-05-12 | Rehm Gallus | Keilverankerung fuer 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 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1250101B (de) * | 1967-09-14 | |||
BE544574A (de) * | ||||
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 |
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 (de) * | 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 |
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 |
-
1986
- 1986-07-31 FR FR8611140A patent/FR2602258B1/fr not_active Expired
-
1987
- 1987-07-24 ES ES87401741T patent/ES2010712B3/es not_active Expired
- 1987-07-24 AT AT87401741T patent/ATE46555T1/de not_active IP Right Cessation
- 1987-07-24 EP EP87401741A patent/EP0260163B1/de not_active Expired
- 1987-07-24 DE DE8787401741T patent/DE3760589D1/de not_active Expired
- 1987-07-29 TR TR544/87A patent/TR23353A/xx unknown
- 1987-07-31 CN CN87105250A patent/CN1008826B/zh not_active Expired
- 1987-07-31 JP JP62192543A patent/JPS6343046A/ja active Pending
-
1988
- 1988-11-08 US US07/270,432 patent/US4941303A/en not_active Expired - Lifetime
-
1989
- 1989-09-21 GR GR89400067T patent/GR3000161T3/el unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
FR2069424A5 (de) * | 1969-12-31 | 1971-09-03 | Joslyn Mfg & Supply Co | |
DE2550137A1 (de) * | 1975-11-07 | 1977-05-12 | Rehm Gallus | Keilverankerung fuer 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 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995029308A1 (de) * | 1994-04-25 | 1995-11-02 | Eidgenössische Materialprüfungs- und Forschungsanstalt Empa | Verankerung für hochleistungsfaserverbundwerkstoff-drähte |
Also Published As
Publication number | Publication date |
---|---|
US4941303A (en) | 1990-07-17 |
DE3760589D1 (en) | 1989-10-26 |
TR23353A (tr) | 1989-12-19 |
EP0260163B1 (de) | 1989-09-20 |
GR3000161T3 (en) | 1990-12-31 |
ES2010712B3 (es) | 1989-12-01 |
CN87105250A (zh) | 1988-02-10 |
FR2602258A1 (fr) | 1988-02-05 |
CN1008826B (zh) | 1990-07-18 |
ATE46555T1 (de) | 1989-10-15 |
FR2602258B1 (fr) | 1988-11-04 |
JPS6343046A (ja) | 1988-02-24 |
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