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EP0050346A2 - Tête d'ancrage pour des torons ou câbles destinée à mettre sous tension des structures métalliques ou en béton - Google Patents

Tête d'ancrage pour des torons ou câbles destinée à mettre sous tension des structures métalliques ou en béton Download PDF

Info

Publication number
EP0050346A2
EP0050346A2 EP81108474A EP81108474A EP0050346A2 EP 0050346 A2 EP0050346 A2 EP 0050346A2 EP 81108474 A EP81108474 A EP 81108474A EP 81108474 A EP81108474 A EP 81108474A EP 0050346 A2 EP0050346 A2 EP 0050346A2
Authority
EP
European Patent Office
Prior art keywords
strands
plate
cables
adjoining
front plate
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
EP81108474A
Other languages
German (de)
English (en)
Other versions
EP0050346A3 (en
EP0050346B1 (fr
Inventor
Cesare Previdini
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.)
FIN EST SpA
PONTEGGI EST SpA
Original Assignee
FIN EST SpA
PONTEGGI EST SpA
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 FIN EST SpA, PONTEGGI EST SpA filed Critical FIN EST SpA
Publication of EP0050346A2 publication Critical patent/EP0050346A2/fr
Publication of EP0050346A3 publication Critical patent/EP0050346A3/en
Application granted granted Critical
Publication of EP0050346B1 publication Critical patent/EP0050346B1/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
    • E04C5/125—Anchoring devices the tensile members are profiled to ensure the anchorage, e.g. when provided with screw-thread, bulges, corrugations

Definitions

  • This invention relates to a head for positioning the ends of an assembly of cables or strands, prearranging the same for tensioning, and subdividing the stresses due to said tensioning, so that these stresses will be applied adeguately to the structure to be tensioned.
  • the distribution of the strands or cable on the outer front plate of a head has been carried out, so that one or more jacks putting the cable or individual strands under tension can be applied thereto.
  • the arrangement is such that the overall stress acts on the periphery of the outer front plate of the head. This involves a not optimum utilization of the available space and a non uniform distribution of the stresses to the plate, and accordingly to the metal or concrete structure on which said plate is mounted, making it necessary to dimension the metal or concrete structure for stresses existing only in zones of reduced dimensions.
  • the positioning obtained is not always stable since the outer front plate or plates may be displaced during casting.
  • the main object has been acomplished by providing that each connection of the strands or cables to the head bearing plate is provided at the vertices of a lattice formed by adjoining equilateral triangles.
  • an improvement of the invention provides that the plate periphery is provided with mutual coupling members defining the position of one plate relative to another plate. Particularly, it is contemplated that on at least some of its sides the plate periphery follows the same equilateral triangle configuration, passing approximately in the center lines of the triangle sides, whereby a plate can be arranged near another plate, the equilateral triangle lattice remaining unaltered also in the connecting zone between a plurality of adjoining plates.
  • the plates can be coupled either by superimposition or by juxtaposition or side by side arrangement, forming a set of mutual joints preventing the plates from being displaced during the concrete cast step, thus maintaining surely the position defined by the project.
  • a sleeve is preferably provided for improving the anchoring of the plate to the concrete.
  • a head according to the present invention comprises a cone 10 secured to the end of a sheath 12, having a series of tubes 11 branching off therefrom, one for each cable or strand, which tubes act as coatings therefor. They serve for leading the strands to the sleeves 24, then to the connections formed of holes 21, which are provided in the front plate 20.
  • the series of holes 21 is arranged at such a position as to form a lattice of adjoining equilateral triangles, at the vertices of which said holes 21 are provided. Reinforcing ribs 23 are provided between the holes 21.
  • the periphery 22 of plate 20 is provided with mutual coupling members 25 and 26 securing one plate relative to the adjoining plates. Further portions of this periphery 22 are shaped with projections 27 and recesses 28 which work as coupling members and placed in such a way as to be inserted between the sides of the various equilateral triangles, so that the arrangement of the strands of a plurality of adjoining plates always corresponds to .the vertices of equilateral triangles, as shown in Fig. 4. Thus, in this figure it will be seen that the distance d between two holes 21 remains unaltered even if measured between two holes 21 pertaining to two adjoining plates 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
EP81108474A 1980-10-22 1981-10-18 Tête d'ancrage pour des torons ou câbles destinée à mettre sous tension des structures métalliques ou en béton Expired EP0050346B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT25497/80A IT1133979B (it) 1980-10-22 1980-10-22 Testata di ancoraggio per trefoli o cavi atti a mettere in tensione strutture metalliche o in calcestruzzo
IT2549780 1980-10-22

Publications (3)

Publication Number Publication Date
EP0050346A2 true EP0050346A2 (fr) 1982-04-28
EP0050346A3 EP0050346A3 (en) 1982-07-14
EP0050346B1 EP0050346B1 (fr) 1985-01-16

Family

ID=11216873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108474A Expired EP0050346B1 (fr) 1980-10-22 1981-10-18 Tête d'ancrage pour des torons ou câbles destinée à mettre sous tension des structures métalliques ou en béton

Country Status (3)

Country Link
EP (1) EP0050346B1 (fr)
DE (1) DE3168371D1 (fr)
IT (1) IT1133979B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177433A (en) * 1985-06-26 1987-01-21 Manuf Aceros Caucho Sa Anchorage for stressed reinforcing tendon
US7049345B2 (en) 2001-06-29 2006-05-23 Genzyme Corporation Fat-binding polymers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB864170A (en) * 1958-11-01 1961-03-29 Carves Simon Ltd Improvements in and relating to anchoring means for wire cables
GB1256359A (en) * 1968-11-26 1971-12-08 Michael Robert Johns Improvements in prestressed concrete structures
AU484438B2 (en) * 1974-04-24 1975-10-30 Triple Bee Prestress (Proprietary) Limited A device for anchoring or coupling cables

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177433A (en) * 1985-06-26 1987-01-21 Manuf Aceros Caucho Sa Anchorage for stressed reinforcing tendon
US7049345B2 (en) 2001-06-29 2006-05-23 Genzyme Corporation Fat-binding polymers

Also Published As

Publication number Publication date
DE3168371D1 (en) 1985-02-28
EP0050346A3 (en) 1982-07-14
IT1133979B (it) 1986-07-24
IT8025497A0 (it) 1980-10-22
EP0050346B1 (fr) 1985-01-16

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