EP1437451A1 - Draht-förmiges Element für Stahlbeton - Google Patents

Draht-förmiges Element für Stahlbeton Download PDF

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Publication number
EP1437451A1
EP1437451A1 EP04366001A EP04366001A EP1437451A1 EP 1437451 A1 EP1437451 A1 EP 1437451A1 EP 04366001 A EP04366001 A EP 04366001A EP 04366001 A EP04366001 A EP 04366001A EP 1437451 A1 EP1437451 A1 EP 1437451A1
Authority
EP
European Patent Office
Prior art keywords
wire
notches
element according
wires
wire element
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
EP04366001A
Other languages
English (en)
French (fr)
Other versions
EP1437451B1 (de
Inventor
André Demonte
Jean-Pascal Leloire
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.)
Fontainunion Sa
Original Assignee
Fontainunion 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 Fontainunion Sa filed Critical Fontainunion Sa
Publication of EP1437451A1 publication Critical patent/EP1437451A1/de
Application granted granted Critical
Publication of EP1437451B1 publication Critical patent/EP1437451B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D07B1/08—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core the layers of which are formed of profiled interlocking wires, i.e. the strands forming concentric layers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
    • 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
    • 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
    • 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
    • D07B2201/2001—Wires or filaments
    • D07B2201/2002—Wires or filaments characterised by their cross-sectional shape
    • 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
    • D07B2201/2001—Wires or filaments
    • D07B2201/2007—Wires or filaments characterised by their longitudinal shape
    • 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 wire elements for reinforcing steel suitable for use as reinforcements, for example in the form of sheets metal, for the construction of roads, towpaths, etc ... and more generally of any reinforced concrete structure that can be built continuously or is likely to be.
  • the continuous construction of concrete road sections armed for example requires a long and tedious job of reinforcement when, as this is generally the case, the metal tablecloth is constructed from bars delivered in boots cut to a length of about a dozen meters and one must be dropped off following the other then tie them at the end two by two as the advancement of the structure by providing for an overlap length between bars consecutive not necessary to the robustness of the structure.
  • the present invention aims to reduce the assembly work of the reinforcement and avoid bad reinforcement links in the longitudinal direction.
  • the subject of the invention is a wire element for reinforcing reinforced concrete for the production of continuous structures, element characterized in that it consists of a strand comprising a central core surrounded by a series of '' at least six notched steel wires wound helically around it to form an outer layer, in that said winding helices have a pitch of between 125 and 400 mm approximately, and in that said strand is made of steel ensuring, on the one hand, a breaking strength of between 800 and 1,400 N / mm 2 approximately and, on the other hand, a straightness such that its maximum deflection is less than approximately 25 mm for 1 m in length, a once the coiled strand is deployed.
  • notched wire is meant a wire having on the surface a series of notches, or teeth, in relief.
  • a notched wire within the meaning of the invention does not include surface wires indented, that is to say with hollow imprints.
  • the notched wire will preferably be substantially symmetrical.
  • the notches will however advantageously oriented in a direction forming an angle substantially constant with respect to the central axis of the wire. This angle is for example between 2 and 60 °, advantageously between 5 and 45 ° and preferably around 30 °.
  • the body, or central core is itself advantageously a steel wire, which wire can be smooth, notched or indented on the surface. It advantageously presents a cross section at least equal to 1.03 times the average cross section of the notched wires which surround it and which conventionally have a diameter between 3 and 6 mm.
  • the helix pitch of the winding of the wires around the core is advantageously substantially constant and preferably between 200 and 300 mm.
  • the wired concrete reinforcing element according to the invention can be of monolayer type surrounding the central core or multi-layer type.
  • element may have a single layer of six wires wrapped helically around the core central.
  • the element comprises two superimposed layers surrounding the central body, the outer layer being formed of nine notched wires, while the inner layer is also formed by nine wires, this inner layer surrounding the central wire.
  • the wires of the inner layer can be smooth, notched them also, or present intaglio prints.
  • the element is made of a medium carbon steel grade, for example 0.46% C (in any case less than 0.6% and preferably between 0.3 and 0.6%) ensuring a breaking strength of between 1,000 and 1,300 N / mm 2 approximately and a straightness such that its maximum residual deflection, coming from its plastic deformation on a winding support, is less than approximately 25 mm per meter of length (and preferably as low as possible) when it comes to be unwound from its support at the time of its deployment during the construction of the concrete structure for which it is intended, the roadway in particular. It will be noted that its diameter is of the order of 50 times and more less than that of the winding mandrel which receives it.
  • the notched wires of the layer external have at least two distinct series of notches: the notches of a first series being carried by a longitudinal zone of the surface of the wire distinct from the zone longitudinal of the surface which carries the notches of the second series.
  • the notches have preferably a height between 0.25 and 0.60 mm, a width at the top between 1 and 1.5 mm, a length between 3 and 5 mm, and are arranged, for each series, one after the other with a spacing of between 3 and 6 mm.
  • the reinforcing wire element according to the invention advantageously has an overall cross section of between 90 and 200 mm 2 .
  • the element has undergone a thermo-mechanical treatment at a temperature between 200 and 500 ° C, and preferably between 350 and 450 ° C, said treatment being carried out continuously on the element subjected to an elongation between 0.5 and 2%, preferably about 1%.
  • thermo-mechanical treatment allows if necessary, relax certain mechanical constraints linked to the manufacturing process, but also to increase its elastic limit Re.
  • a major advantage of the invention is to be able present to the realization of a reinforced concrete structure in front of or which can be built in continuous, in particular at the parade on the site of use itself, a wire element of flexible steel reinforcement, with surface anchoring notches, and can be rolled out on site from its support reel as the work progresses, therefore in length infinite theoretical, in other words which, unlike rigid bars, does not require overlap length to be tied to ensure its continuity once deposited in the work in progress.
  • the element advantageously has a length at least 100 meters, in particular at least 500 meters, preferably at least 1 000 meters.
  • the invention also relates to the use of a wire element according to the invention to form a reinforcement in any concrete structure in front of or capable of being continuously produced on its site of use, and therefore such a reinforced concrete structure with a reinforcement at least partially formed with a wire element according to the invention.
  • the invention also relates to the packaging of the wire element according to the invention in the form of a coil, the diameter of the element to be wound being chosen to be less than 50 times and more the diameter of the support mandrel which receives it.
  • the coil thus has an element length which can be adapted as required, for example example a length of 100 m, 500 m, 1,000 m, 2,000 m, 4,000 m, 5,000 m, 10,000 m, see more.
  • the invention also relates to a process for preparing a wired reinforcing element according to the invention, in which the successive portions of a element according to the invention are subjected to a thermo-mechanical treatment at a temperature between 200 and 500 ° C under an elongation between 0.5 and 2% for a period of 1 to 30 seconds, before being subjected to forced cooling to quickly lower its temperature below 150 ° C.
  • the reinforcing element (seven-wire) shown in Figures 1 and 2 includes a smooth steel wire 1 forming the central core of the element and a series of six steel wires notches 2 forming a compact outer layer covering the central core 1.
  • the notches are formed at the end of the drawing operation which makes it possible to obtain the desired diameter from a wire rod supplied with crowns.
  • the drawn wire passes in a finishing cage with honeycombed rollers which print the notches on the surface of the wire. After stranding, a heat treatment is carried out (see below), the strand is then wound and directed towards the expedition park.
  • the average diameter of the steel wires 1 and 2 is for example around 4 to 5 mm.
  • the average diameter of a notched wire is calculated on the basis of its weight per unit of length.
  • the diameter of the wire 1 constituting the core is for example equal to approximately 1.03 to 1.05 times the average diameter of a notched wire.
  • the notched steel wires 2 are twisted around the central core 1 using a traditional stranding machine for cables to ultimately form a continuous twisted web enveloping the nucleus. During the stranding, each wire 2 thus follows a shaped path propeller whose pitch P is substantially constant and corresponds to approximately 23 cm.
  • the wires 2 have three rows of notches occupying three respectively separate longitudinal areas of the surface 20, 21, 22. Each row extends substantially parallel to the axis of the wire considered (see in Figure 3 wire 2 before its helical positioning).
  • the rows of notches 20, 21, 22 extend over the surface of the wire in forming a constant angle with respect to the central axis 24 of the wire considered (this angle corresponds to the angle between the central axis and the plane of symmetry 25 of a notch).
  • the notches have for example a height "h" of about 0.4mm, a width of the base LB of about 1.6mm, a width at the top LS of about 1.2mm, and a spacing E between two successive notches of about 2.6mm (the notches are therefore arranged helically one after the other along the wire with a PP pitch of about 4.2 mm.
  • the rows of notches are for example arranged along longitudinal zones offset by 120 ° therebetween in order to be regularly distributed over the surface of the wire.
  • the notches of a row are advantageously offset relative to the longitudinal position of the notches.
  • the notches have for example a length "1" corresponding to approximately 100-120 ° of the circumference of the wire.
  • the total cross section of the element is for example around 90 to 200 mm 2 for a diameter of the element from 11 to 19 mm.
  • the notches or teeth wires 2 are placed naturally so as to form stops which oppose longitudinal movements of the wires 2 relative to the core wire 1.
  • the wire element shown in Figures 1 and 2 is advantageously subjected to a heat treatment under traction.
  • processing is done in a way continues on successive portions of the element.
  • This treatment is for example carried out at a temperature of approximately 400 ° C. while ensuring a tensile elongation of 1% of the portion during its heat treatment.
  • the heat treatment is carried out during a ten seconds.
  • the portion is sprayed of water or passes into a water bath so as to lower suddenly (almost instantaneous) its temperature below 100 ° C.
  • This treatment eliminates tensions present during the manufacture of the element, but also to increase its limit of elasticity Re for an elongation of less than 0.5%, for example for an elongation 0.2%.
  • the steel of wires 1 and 2 according to the invention is preferably chosen in a "semi-hard" grade, with low or medium carbon (ie with a carbon content not exceeding 0.6% by weight) facilitating cold notching, and so that, on the one hand, the tensile strength Rm of the element is between 800 and 1400 N / mm 2 and preferably between 1100 and 1200 N / mm 2 , and that, on the other hand, after having been unwound from a coil 10 with a central mandrel 11 (see FIGS.
  • Tests were carried out with strands according to the invention (breaking strength Rm of 1100 N / mm 2 , cross section of approximately 95 mm 2 notched peripheral wires around a smooth steel wire) and with conventional bars with a diameter of the order of 14 -16 mm.
  • the element according to the invention is then advantageously used to produce continuous longitudinal reinforcement for concrete track sections, providing a significant reduction in the work of assembling the reinforcement and avoiding bad reinforcing links in the longitudinal direction.
  • the central core is preferably also made of steel, as the sons around him are not necessarily an obligation. Other materials may be appropriate. However, care will be taken to ensure that they can high temperatures of the strand heat treatment, if this is to take place.
  • a notch zone can have a different orientation than the other zones relative to the axis some thread.
  • notching or “notches” it should be understood that it is a question of relief patterns to ensure an anchoring effect of the concrete on the surface of the wire.
  • These patterns in relief can be discontinuous patterns (teeth) distributed on the surface of the wire, as described in the examples above. They can also be continuous patterns, then forming rather ribs on the surface of the wire, it being understood however that in such a variant of realization, we lose a little specific surface for anchoring the concrete, all things equal moreover, compared to the tooth variant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Panels For Use In Building Construction (AREA)
EP04366001A 2003-01-08 2004-01-07 Draht-förmiges Element für Stahlbeton Expired - Lifetime EP1437451B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE200300016 2003-01-08
BE2003/0016A BE1015295A3 (fr) 2003-01-08 2003-01-08 Element de renforcement pour beton.

Publications (2)

Publication Number Publication Date
EP1437451A1 true EP1437451A1 (de) 2004-07-14
EP1437451B1 EP1437451B1 (de) 2008-05-21

Family

ID=32476778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04366001A Expired - Lifetime EP1437451B1 (de) 2003-01-08 2004-01-07 Draht-förmiges Element für Stahlbeton

Country Status (4)

Country Link
EP (1) EP1437451B1 (de)
AT (1) ATE396311T1 (de)
BE (1) BE1015295A3 (de)
DE (1) DE602004013852D1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1409150A1 (de) * 1958-11-05 1970-02-12 Hufnagl Walter Bewehrungseinlage fuer Betonbauteile
FR1586725A (de) * 1967-10-04 1970-02-27
DE2009150A1 (de) * 1970-02-27 1971-09-02 Stahlwerke Peine Salzgitter AG, 315OPeine Betonbewehrungsstab mit warmgewalzten Rippen
US3716982A (en) * 1969-11-17 1973-02-20 T Morohashi Extra coarse-laid wire rope for reinforced concrete
US3847002A (en) * 1972-06-13 1974-11-12 Suzuke Metal Ind Co Ltd Method of producing steel wire and strand for pre-stressed concrete construction
EP0199461A2 (de) * 1985-03-19 1986-10-29 BRIDON plc Herstellung von strangförmigen Elementen wie Litzen und Seile
WO1987003322A1 (en) * 1985-11-26 1987-06-04 "December 4." Drótmüvek Strand for stressed concrete structure and process for its production
EP0656441A1 (de) * 1993-12-02 1995-06-07 HIEN ELECTRIC INDUSTRIES, Ltd. Drahtlitze mit einer Korrosionsschutzbeschichtung und Verfahren zu deren Herstellung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1409150A1 (de) * 1958-11-05 1970-02-12 Hufnagl Walter Bewehrungseinlage fuer Betonbauteile
FR1586725A (de) * 1967-10-04 1970-02-27
US3716982A (en) * 1969-11-17 1973-02-20 T Morohashi Extra coarse-laid wire rope for reinforced concrete
DE2009150A1 (de) * 1970-02-27 1971-09-02 Stahlwerke Peine Salzgitter AG, 315OPeine Betonbewehrungsstab mit warmgewalzten Rippen
US3847002A (en) * 1972-06-13 1974-11-12 Suzuke Metal Ind Co Ltd Method of producing steel wire and strand for pre-stressed concrete construction
EP0199461A2 (de) * 1985-03-19 1986-10-29 BRIDON plc Herstellung von strangförmigen Elementen wie Litzen und Seile
WO1987003322A1 (en) * 1985-11-26 1987-06-04 "December 4." Drótmüvek Strand for stressed concrete structure and process for its production
EP0656441A1 (de) * 1993-12-02 1995-06-07 HIEN ELECTRIC INDUSTRIES, Ltd. Drahtlitze mit einer Korrosionsschutzbeschichtung und Verfahren zu deren Herstellung

Also Published As

Publication number Publication date
DE602004013852D1 (de) 2008-07-03
ATE396311T1 (de) 2008-06-15
EP1437451B1 (de) 2008-05-21
BE1015295A3 (fr) 2005-01-11

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