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EP0248865B1 - Cable de precontrainte pour unites en beton prefabrique - Google Patents

Cable de precontrainte pour unites en beton prefabrique Download PDF

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Publication number
EP0248865B1
EP0248865B1 EP19870900151 EP87900151A EP0248865B1 EP 0248865 B1 EP0248865 B1 EP 0248865B1 EP 19870900151 EP19870900151 EP 19870900151 EP 87900151 A EP87900151 A EP 87900151A EP 0248865 B1 EP0248865 B1 EP 0248865B1
Authority
EP
European Patent Office
Prior art keywords
wires
core part
cable
outer wires
twisted around
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
EP19870900151
Other languages
German (de)
English (en)
Other versions
EP0248865A1 (fr
Inventor
Ilmari Paakkinen
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.)
Partek Oy AB
Original Assignee
Partek Oy AB
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 Partek Oy AB filed Critical Partek Oy AB
Priority to AT87900151T priority Critical patent/ATE51665T1/de
Publication of EP0248865A1 publication Critical patent/EP0248865A1/fr
Application granted granted Critical
Publication of EP0248865B1 publication Critical patent/EP0248865B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0693—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a strand configuration
    • 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
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2024—Strands twisted
    • D07B2201/2029—Open winding
    • D07B2201/2031—Different twist pitch
    • D07B2201/2032—Different twist pitch compared with the core
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D07B2201/2061—Cores characterised by their structure comprising wires resulting in a twisted structure
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2015—Construction industries
    • D07B2501/2023—Concrete enforcements

Definitions

  • the present invention relates to a prestressing cable for precast concrete units, said cable comprising a core part and outer wires twisted around the core part, the core part comprising two wires twisted around each other, the section of the said wires being based on a circle, or one wire twisted around its own axis and having a flattened section.
  • prestressing cables of steel are used and are subjected to a tensile strain before casting of the concrete structure.
  • Most commonly the cable consists of six individual wires twisted around a core wire.
  • the object of the present invention is to improve the adherence of the cable to the concrete.
  • the prestressing cable in accordance with the invention is characterized in that the direction of twisting of the core part is opposite to the direction of twisting of the outer wires.
  • the core part of the cable in accordance with the first embodiment of the invention consists of two wires 1 whose section is circular ( Figures 1 to 4). These two wires are twisted around each other.
  • the twisting of the core part is right-handed, i.e. S-spiral.
  • outer wires 2 Around the core part, six outer wires 2 have been twisted, whose section is also circular and whose diameter is about 1s times the diameter of the wires 1 in the core part ( Figures 3 and 4).
  • the direction of twisting of the outer wires is opposite to the direction of twisting of the wires in the core part.
  • the direction of twisting of the outer wires is left-handed, i.e. Z-spiral.
  • the pitch of the spiral of the outer wires is considerably higher than the pitch of the spiral of the core part. This means that, within a certain length of cable, the number of windings of the core part is clearly higher than the number of windings of the outer wires.
  • Figures 5 and 6 show an alternative embodiment of a core part.
  • the core part consists of a flattened wire 3, which is twisted around its own axis.
  • the direction and the pitch of the spiral are similar to those in the core part shown in Figures 1 and 2.
  • the dimensioning of the section of the core wire is most appropriately such that its largest diameter is equal to the diameter of the outer wires 2, whereas the smallest diameter, perpendicular to the largest diameter, is one half of the largest diameter.
  • the invention is not confined to the embodiments described above.
  • the number of outer wires may be different from six. For example, four wires is enough, depending on the ratio of the diameter of the outer wires to the section of the core part.
  • Figure 7 an embodiment is shown in which the diameter of the outer wires is equal to the diameter of the two wires in the core part, and the number of the outer wires is eight.
  • the figure shows three adjoining sections at intervals of 1/8 of the pitch.
  • the pitch of the spirals of the core wires and of the outer wires is the same.
  • the core wires are denoted with letter symbols a, b, and some of the outer wires are denoted with letter symbols e to h, whereby the effect of opposite twisting directions is seen clearly.
  • the outer face of the wires may be smooth, or the wire faces may be provided with projections or recesses to improve the adherence.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ropes Or Cables (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

Le câble ci-décrit comprend une partie âme autour de laquelle sont torsadés des fils extérieurs (2). La partie âme est constituée de deux fils (1) torsadés l'un autour de l'autre, la section desdits fils étant basée sur un cercle, ou bien d'un seul fil (3) torsadé autour de son propre axe et présentant une section aplatie. Le sens de torsion de la partie âme (1 ou 3) est contraire au sens de torsion des fils extérieurs (2).

Claims (4)

1. Câble de précontrainte pour unités en béton préfabriqué, ledit câble comprenant une partie d'âme et des fils métalliques externes (2) torsadés autour de la partie de l'âme, la partie de l'âme comprenant deux fils métalliques (1) torsadés l'un autour de l'autre, la section desdits fils métalliques (1) étant basée sur un cercle, ou bien un fil (3) torsadé autour de son propre axe et ayant une section aplatie, caractérisé en ce que la direction de torsion de la partie de l'âme (1 ou 3) est opposée à la direction de torsion des fils externes (2).
2. Câble de précontrainte selon la revendication 1, où le rapport du pas de la spirale de la partie de l'âme (1 ou 3) au pas de la spirale des fils externes est compris entre 2 et 0,3.
3. Câble de précontrainte selon la revendication 1 ou la revendication 2, où les faces des fils externes (2) sont lisses ou profilées.
4. Câble de précontrainte selon l'une quelconque des revendications 1 à 3, où le diamètre des fils externes (2) est sensiblement égal au diamètre des deux fils (1) de l'âme et le nombre des fils externes (2) est de huit.
EP19870900151 1985-11-27 1986-12-10 Cable de precontrainte pour unites en beton prefabrique Expired EP0248865B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87900151T ATE51665T1 (de) 1985-11-27 1986-12-10 Vorgespannte kabel fuer spannbeton.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI854697A FI73039C (fi) 1985-11-27 1985-11-27 FOERSPAENNINGSKABEL FOER BETONGELEMENT. SIIRRETTY PAEIVAEMAEAERAE-FOERSKJUTET DATUM PL 14 ç 11.12.85
FI854697 1985-12-11

Publications (2)

Publication Number Publication Date
EP0248865A1 EP0248865A1 (fr) 1987-12-16
EP0248865B1 true EP0248865B1 (fr) 1990-04-04

Family

ID=8521751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870900151 Expired EP0248865B1 (fr) 1985-11-27 1986-12-10 Cable de precontrainte pour unites en beton prefabrique

Country Status (11)

Country Link
EP (1) EP0248865B1 (fr)
JP (1) JPS63502843A (fr)
AU (1) AU6779887A (fr)
DD (1) DD254755A5 (fr)
DE (1) DE3670118D1 (fr)
FI (1) FI73039C (fr)
GR (1) GR862888B (fr)
HU (1) HU205417B (fr)
NZ (1) NZ218599A (fr)
PT (1) PT83912B (fr)
WO (1) WO1987003636A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0723591B2 (ja) * 1988-12-07 1995-03-15 株式会社ブリヂストン ゴム物品補強用スチールコード及び空気入りラジアルタイヤ
WO1993001375A1 (fr) * 1991-07-09 1993-01-21 Severo-Kavkazsky Territorialny Kooperativno-Gosudarstvenny Nauchno-Issledovatelsky I Proektny Institut Agropromyshlennogo Komplexa Cable metallique d'armature

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US952161A (en) * 1906-11-01 1910-03-15 George S Whyte Non-rotating wire rope.
BE593899A (fr) * 1959-08-11
BE654920A (fr) * 1964-10-28 1965-02-15
SE340875B (fr) * 1970-03-12 1971-12-06 Straengbetong Ab
GB1311914A (en) * 1970-09-05 1973-03-28 Kobe Steel Ltd Steel cord
US3996733A (en) * 1976-01-27 1976-12-14 Uniroyal Inc. Reinforcing cord construction
DE2755667A1 (de) * 1977-12-14 1979-06-21 Continental Gummi Werke Ag Stahlseil als festigkeitstraeger in gummiartikeln, insbesondere in luftreifen

Also Published As

Publication number Publication date
DD254755A5 (de) 1988-03-09
AU6779887A (en) 1987-06-30
PT83912B (en) 1989-01-03
HU205417B (en) 1992-04-28
WO1987003636A1 (fr) 1987-06-18
DE3670118D1 (de) 1990-05-10
PT83912A (en) 1987-01-01
FI73039C (fi) 1987-08-10
FI73039B (fi) 1987-04-30
HUT44304A (en) 1988-02-29
EP0248865A1 (fr) 1987-12-16
NZ218599A (en) 1989-07-27
JPS63502843A (ja) 1988-10-20
FI854697A0 (fi) 1985-11-27
GR862888B (en) 1987-04-08

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