EP0621380B1 - Armature pour le renforcement de structures en béton et procédé et dispositif de fabrication de cette armature - Google Patents

Armature pour le renforcement de structures en béton et procédé et dispositif de fabrication de cette armature Download PDF

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Publication number
EP0621380B1
EP0621380B1 EP94400821A EP94400821A EP0621380B1 EP 0621380 B1 EP0621380 B1 EP 0621380B1 EP 94400821 A EP94400821 A EP 94400821A EP 94400821 A EP94400821 A EP 94400821A EP 0621380 B1 EP0621380 B1 EP 0621380B1
Authority
EP
European Patent Office
Prior art keywords
ribs
strip
tape
faces
reinforcement
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 - Lifetime
Application number
EP94400821A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0621380A1 (fr
Inventor
Geoffroy Bollaert
Vincent Gillet
Georges Guerin
Alain Le Bon
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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 Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0621380A1 publication Critical patent/EP0621380A1/fr
Application granted granted Critical
Publication of EP0621380B1 publication Critical patent/EP0621380B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E04C5/01—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
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0023—Details, e.g. foundations

Definitions

  • the present invention relates to a reinforcement for reinforcing concrete structures and to a method and a device for manufacturing this reinforcement.
  • the embossing comprises reliefs formed, alternately, by projections delimiting bosses, and by hollows delimiting cells.
  • embossing makes it possible to obtain a good anchoring of the steel strip in the concrete having the effect of an almost total mobilization of the resistance of the reinforcement, this provided that the concrete used has a very high resistance and that the relative displacements between steel and concrete, during a traction exerted on this tape, are greater than a millimeter.
  • reinforcing tapes are generally packaged in reels so that at the time of their use the unrolled tapes present a very troublesome bending during the break of these tapes for the manufacture of reinforced concrete structures.
  • the object of the invention is in particular to optimize the mobilization of the resistance of steel ribbons intended to reinforce ordinary or lean concrete structures, when the relative displacements between steel and concrete are very small, this by providing ribbons of armature that can be conditioned in reels and which do not have bending after being unwound.
  • the subject of the invention is a reinforcement for the reinforcement of concrete structures, in particular concrete slabs or veils, comprising a coilable steel strip intended to be incorporated into the concrete, characterized in that the faces of the steel tape each comprise ribs arranged in at least one longitudinal row being substantially parallel to one another and inclined at an angle ⁇ relative to the longitudinal direction of the ribbon, each row of ribs being bordered laterally by smooth longitudinal zones coplanar with the faces ribbon.
  • the invention also relates to a device for manufacturing a steel strip of a reinforcing reinforcement for concrete structures or, in particular concrete slabs or veils, the reinforcement comprising a steel ribbon intended to be incorporated in concrete, said device being of the type comprising a frame, two parallel notching cylinders, each mounted on a drive shaft carried by bearings, means for adjusting the spacing between the notching cylinders and means of synchronized drive in rotation of said locking cylinders, characterized in that each locking cylinder comprises, on the one hand, a set of independent and juxtaposed discs mounted on the corresponding drive shaft and whose working faces are provided of projecting parts of conjugate shape to produce said ribs on the faces of the strip and, on the other hand, means of relative positioning of the projecting parts d e each disc with respect to the adjacent discs as a function of the distribution of the ribs on the faces of the strip, the discs of each assembly being connected to each other and to the corresponding drive shaft by connecting means.
  • FIG. 1 to 4 an armature according to a first embodiment of the invention comprising a steel strip 10 for reinforcing a concrete structure, for example a reinforced concrete pavement slab manufactured continuously.
  • the strip 10 can be made of galvanized steel.
  • each of the faces of the ribbon 10 has rectilinear ribs 12 arranged in two longitudinal rows R.
  • Each row R is arranged in one of the two halves of the ribbon 10 symmetrical with respect to the median longitudinal axis X of the ribbon 10.
  • the ribs 12 of each row R are substantially parallel to each other and inclined relative to the longitudinal direction of the ribbon 10 at an angle ⁇ having an absolute value preferably between 45 and 90 °.
  • the ribs 12 have an angle of inclination ⁇ of approximately 60 ° in absolute value.
  • the ribs 12 of one of the faces of the ribbon are symmetrical to the ribs of the other of the faces of the ribbon with respect to the median plane P of the ribbon parallel to the faces of this ribbon.
  • the ribs 12 of the same row R are spaced longitudinally between them at a constant pitch of between 3 and 20 mm, preferably between 5 and 10 mm.
  • the close ends of the ribs 12 of the two rows R are offset longitudinally between them and the ribs 12 of one of the rows R have an angle of inclination opposite to that of the ribs 12 of the other row R so as to form a pattern on the cob.
  • each row of ribs is bordered laterally by smooth longitudinal zones 14, the smooth zone 14 disposed between the two rows R being aligned with the median longitudinal axis X of the ribbon 10.
  • each rib 12 has an elongated shape and has a cross section delimited by an isosceles trapezoid.
  • the upper faces of the nevures may be located in the plane of the ribbon.
  • the ribs may have other possible shapes which are substantially rectilinear, in particular elongated S-shapes comprising a rectilinear central part and slightly curved ends.
  • each rib 12 is between 0.1 and 0.5 mm and the width of the base of each rib 12 is between 1 and 4 mm.
  • the width of the base of each rib 12 is equal to approximately 2.5 mm.
  • the ribbon 10 further comprises a slot 16 and a hook 18 arranged one and the other at opposite ends of the ribbon.
  • the lumen 16 has a generally rectangular shape and the hook 18 is formed by a generally rectangular puncture formed in the ribbon.
  • the angles of the light can be rounded.
  • the light 16 and the hook 18 form means for hooking the ribbon 10 in particular, either with another identical ribbon aligned with it during the manufacture of a reinforced concrete structure, or with a reel for winding the ribbon 10 comprising complementary hooking means of the hook or light.
  • the light 16 and the hook 18 are aligned along the median longitudinal axis X of the ribbon 10.
  • longitudinal rows of substantially rectilinear ribs are formed on the faces of a steel sheet or strip having a high yield strength preferably greater than 650 MPa.
  • Such a steel strip is obtained for example by hot rolling a steel strip of thickness between 1.5 and 6 mm having a carbon content of less than 0.9% by weight and an elastic limit equal to approximately 500 MPa, then by rolling this cold steel strip by work hardening by imposing a work hardening rate higher than 40%.
  • a steel strip is then obtained having a thickness between 0.8 and 2.5 mm and an elastic limit greater than 650 MPa.
  • the ribs are preferably formed by passing the steel strip continuously between two notching cylinders, each cylinder comprising juxtaposed discs having, on their contour in contact with the corresponding face of the strip, projecting parts opposite to those which the we want to form on this strip, so that the ribs of one of the faces of the strip are symmetrical to the ribs of the other of the faces relative to the median plane of the strip parallel to the faces of this strip.
  • the rows of ribs are formed side by side along the width of the strip, being spaced apart by smooth longitudinal zones, for example so as to reproduce over the width of the sheet a series of spiky patterns such as that shown on the figure 1.
  • the steel strip undergoes work hardening, the rate of which depends on the height of the ribs formed on the faces of the strip.
  • the steel strip After formation of the ribs, the steel strip is slit along smooth longitudinal zones chosen so as to form ribbons of desired width comprising at least one row of ribs on each of their faces.
  • the rib forming operation or the slitting operation may be preceded by a continuous galvanizing operation by dipping the strip.
  • the strip is slit so as to form ribbons with a width of between 30 and 40 mm, comprising two rows of ribs on each of their faces so as to form a spiky pattern as shown in FIG. 1. You can also split this ribbon in half along the middle smooth area.
  • the ribs can be formed by any means of cold work hardening of a steel strip obtained by cold or hot rolling, in such a way that after final work hardening, the elastic limit of the strip is high , preferably greater than 650 MPa.
  • the ribs can be hot formed on a steel strip of high yield strength, preferably greater than 650 MPa.
  • This ribbon 10B differs from the ribbon 10A in FIG. 1 in that the ribs 12 of each row R have an identical inclination relative to the median longitudinal axis X of the ribbon.
  • This ribbon 10C has a width substantially identical to that of the ribbon 10B shown in FIG. 6 but comprises four rows R of ribs narrower than the rows of ribs of the ribbon 10B.
  • the ribbon 10C comprises, on each side of the median longitudinal axis X, two rows R of ribs 12, the ribs arranged on the same side of the axis X having identical inclinations relative to this axis, and the ribs belonging with two rows arranged on either side of the X axis having opposite inclinations.
  • the ribbon can include any number of rows of ribs, that is to say an even number or an odd number.
  • each face of the steel strip comprises an even number of rows of ribs, these rows being distributed symmetrically with respect to the median longitudinal axis of the strip.
  • the manufacturing device shown in FIGS. 8 and 9 comprises a frame 20 comprising two pairs of columns 21 and 22 supported by a base plate 23 and connected together by crosspieces 24 and 25.
  • the columns 21 and 22 support the ends of two parallel drive shafts 26 and 27, by means of bearings, respectively 28 and 29.
  • the bearings 28 are each formed by a semi-cylindrical cradle 30 closed by a semi-cylindrical flange 31.
  • the bearings 29 each have a bearing 32.
  • the bearings 28 are also each formed by a semi-cylindrical cradle 33 closed by a semi-cylindrical flange 34.
  • the bearings 29 each include a pad 35.
  • the bearings 28 are associated with fixed plates 36, mounted on the columns 21 and 22.
  • the bearings 29 are associated with guide plates 37, mounted vertically displaceable on the columns 21 and 22.
  • each drive shaft 26 and 27 carries a notching cylinder, 40 and 41 respectively.
  • the drive of the shafts 26 and 27 and the notching cylinders 40 and 41 is produced in synchronism by pinions 38 and 39 respectively secured to the shafts 26 and 27, which mesh with a driving pinion, not shown.
  • the spacing between the notching cylinders 40 and 41 is adjusted using screws 42 and 43 acting on the upper plates 37.
  • Stops make it possible to limit the descent of the upper plates 37 and consequently of the bearings 29 and of the locking cylinder 41 in order to prevent this locking cylinder 41 from coming into contact with the locking cylinder 40.
  • each notching cylinder 40 and 41 comprises a set of independent and juxtaposed discs 44, mounted on the corresponding drive shaft 26 or 27.
  • the working faces 44A of the discs 44 are provided, for example, with projecting parts 44B (FIG. 11) of conjugate shape in order to produce the ribs 12 on the faces of the strip.
  • the manufacturing device comprises means for relative positioning of the protruding parts 44B of each disc 44 with respect to the adjacent discs 44 as a function of the distribution of the ribs 12 on the faces of the strip and means for connecting the discs 44 of each set therebetween and with the corresponding drive shaft 26 or 27.
  • the means for relative positioning of the projecting parts 44B of each disc 44 relative to the adjacent discs 44 are formed, as shown in FIG. 10, by transverse orifices 45, distributed angularly and radially on the lateral faces of each of said discs 44.
  • the axes of the orifices 45 are parallel to the axis of the corresponding drive shaft 26 or 27 of the discs 44.
  • each disc 44 has a central orifice 46 for the passage of the drive shaft 26 or 27.
  • each disc 44 is inclined at an angle ⁇ ′ relative to the axis of said disc, as shown in FIG. 11.
  • This angle ⁇ ' corresponds to the angle ⁇ of the ribs 12 which it is desired to form on the faces of the strip.
  • the user may have at his disposal several series of discs 44 whose angular distribution of the orifices 45 is different so as to be able to offset the protruding parts 44B by disc 44 relative to one or two adjacent discs which allows to form on the faces of the strip of rows of ribs 12 offset longitudinally therebetween.
  • the discs 44 can be inverted with respect to each other, as shown in FIG. 11, so that the projecting parts 44B of each disc 44 relative to the adjacent discs have opposite angles of inclination ⁇ '.
  • FIG. 12 there will be described a first embodiment of the means for connecting the disks 44 of the notching cylinder 40 with the drive shaft 26, the means for connecting the disks 44 of the notching cylinder 41 with the drive shaft 27 being identical.
  • These means for connecting the disks 44 with the drive shaft 26 are formed, on the one hand, by two parallel plates 50 and 51, enclosing said disks 44 and, on the other hand, by tie rods 52 connecting the two plates 50 and 51 and passing through the discs 44 through the orifices 45.
  • One of the plates for example the plate 50 carries the drive shaft 26, while the other plate 51 is crossed by said drive shaft 26.
  • the discs 44 are driven in rotation by the tie rods 52 cooperating with the plate 50.
  • the means for connecting the discs 44 with the drive shaft 26 are formed, on the one hand, by two parallel flanges 55 and 56, enclosing the discs 44 and integral in rotation with the drive shaft 26 by means of key 57 and, on the other hand, by tie rods 52 connecting the two flanges 55 and 56 and passing through the discs 44 through the orifices 45.
  • the means for connecting the disks 44 of the locking cylinder 41 with the drive shaft 27 are identical.
  • the drive shaft 26 or 27 can be formed of two half-shafts each carrying at one end a plate. Each half-shaft is mounted in a bearing supported by the columns 21 and 22.
  • the means for connecting the discs 44 with the plates of the two half-shafts are also formed by the tie rods 52 which pass through the said discs through the orifices 45. In this in this case, the discs 44 only have the orifices 45 for the passage of the tie rods 52.
  • the device also includes means for guiding upstream and downstream of the notching cylinders 40 and 41 relative to the direction of travel of said strip.
  • one of the guide means is formed by at least two grooved rollers 60 and 61 arranged on either side of the plane of the strip and each carried by an adjustable support, respectively 62 and 63.
  • Grooved rollers 60 and 61 make it possible to simultaneously counteract the saber effect and the ski effect of the strip.
  • the device also includes means for slitting the strip so as to form tapes of desired width and means for grinding the longitudinal edges of the tapes.
  • These means are constituted for example by a conventional cutting tool and by a grinding wheel allowing two adjacent edges to be ground simultaneously resulting from the slitting of the strip of tape.
  • the invention has many advantages.
  • the ribbon shape of the reinforcement according to the invention makes it possible to provide a very long reinforcement which can be packaged in a coil compatible with the manipulations usually carried out on a site.
  • the reinforcing tape according to the invention retains excellent flatness and straightness after unwinding.
  • T adherent surface per unit of length, section area higher than that of conventional reinforcements with circular sections.
  • This very good anchoring in the concrete results in a total mobilization of the resistance of the steel for relative displacements between the steel reinforcement and the concrete of at least a quarter of a millimeter due to cracks in the concrete of width low generally tolerated, especially for cracks less than 0.5 mm wide.
  • the reinforcing tapes according to the invention make it possible to obtain adhesion and anchoring in the concrete which can exceed the tensile strength of the reinforcement.
  • the reinforcement according to the invention has a very high anchoring capacity and very good mechanical qualities, in particular very good tensile strength.
  • the reinforcement according to the invention can be used simultaneously with an extruded concrete of the "slip form" type for the continuous production over a great length, of slabs or sails, of constant section.
  • the reinforcement according to the invention can be unwound for the successive or simultaneous reinforcement of the roadway, the aisles and the track separation walls.

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  • Architecture (AREA)
  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Bridges Or Land Bridges (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Road Paving Structures (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Sewage (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Saccharide Compounds (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
EP94400821A 1993-04-20 1994-04-14 Armature pour le renforcement de structures en béton et procédé et dispositif de fabrication de cette armature Expired - Lifetime EP0621380B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9304647A FR2704255B1 (fr) 1993-04-20 1993-04-20 Armature pour le renforcement de structures en beton et procede de fabrication de cette armature.
FR9304647 1993-04-20

Publications (2)

Publication Number Publication Date
EP0621380A1 EP0621380A1 (fr) 1994-10-26
EP0621380B1 true EP0621380B1 (fr) 1997-08-27

Family

ID=9446244

Family Applications (1)

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EP94400821A Expired - Lifetime EP0621380B1 (fr) 1993-04-20 1994-04-14 Armature pour le renforcement de structures en béton et procédé et dispositif de fabrication de cette armature

Country Status (11)

Country Link
US (2) US5613340A (fi)
EP (1) EP0621380B1 (fi)
JP (1) JP2882749B2 (fi)
AT (1) ATE157420T1 (fi)
AU (1) AU676885B2 (fi)
CA (1) CA2121656A1 (fi)
DE (1) DE69405144D1 (fi)
FI (1) FI101731B (fi)
FR (1) FR2704255B1 (fi)
NO (1) NO312305B1 (fi)
ZA (1) ZA942673B (fi)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2746120B1 (fr) * 1996-03-15 1998-06-12 Glissiere de securite, procede de mise en place de telle glissiere et machine de mise en oeuvre de ce procede
JP2007245199A (ja) * 2006-03-16 2007-09-27 Calsonic Kansei Corp 波板の製造装置
DE102009048425A1 (de) * 2009-10-06 2011-04-07 Häussler Innovation GmbH Verfahren und Vorrichtung zur Herstellung geschweißter Verbindungen
US20120255336A1 (en) * 2011-04-06 2012-10-11 Chauncey Edward W Systems and methods for corrugating a metallic tape
FR2990710B1 (fr) * 2012-05-18 2015-02-20 Soc Civ D Brevets Matiere Barre d'armature a adherence amelioree
KR102109568B1 (ko) * 2019-11-06 2020-05-12 엠에스파이프 주식회사 파이프형 철근 및 그의 제조방법

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Also Published As

Publication number Publication date
FI101731B1 (fi) 1998-08-14
US5613340A (en) 1997-03-25
US5809819A (en) 1998-09-22
NO312305B1 (no) 2002-04-22
FI941807A (fi) 1994-10-21
FI941807A0 (fi) 1994-04-19
ATE157420T1 (de) 1997-09-15
JP2882749B2 (ja) 1999-04-12
DE69405144D1 (de) 1997-10-02
AU676885B2 (en) 1997-03-27
ZA942673B (en) 1995-10-19
JPH0790984A (ja) 1995-04-04
FR2704255B1 (fr) 1995-07-13
NO941399D0 (no) 1994-04-18
NO941399L (no) 1994-10-21
EP0621380A1 (fr) 1994-10-26
AU5949594A (en) 1994-10-27
CA2121656A1 (fr) 1994-10-21
FR2704255A1 (fr) 1994-10-28
FI101731B (fi) 1998-08-14

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