WO1995013440A1 - Reinforcing steel mesh for concrete - Google Patents

Reinforcing steel mesh for concrete Download PDF

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Publication number
WO1995013440A1
WO1995013440A1 PCT/EP1994/003620 EP9403620W WO9513440A1 WO 1995013440 A1 WO1995013440 A1 WO 1995013440A1 EP 9403620 W EP9403620 W EP 9403620W WO 9513440 A1 WO9513440 A1 WO 9513440A1
Authority
WO
WIPO (PCT)
Prior art keywords
bars
longitudinal
concrete
cross bars
longitudinal bars
Prior art date
Application number
PCT/EP1994/003620
Other languages
German (de)
French (fr)
Inventor
Johannes Bucher
Original Assignee
Nemis Establishment
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 Nemis Establishment filed Critical Nemis Establishment
Publication of WO1995013440A1 publication Critical patent/WO1995013440A1/en

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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
    • E04C5/04—Mats
    • 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

Definitions

  • the invention relates to a reinforcement grid with straight longitudinal bars arranged in one plane and with straight cross bars which are connected to the longitudinal bars at intersection points, with an overlap area being provided on at least one longitudinal side of the reinforcement grid.
  • Such reinforcement grids or reinforcement mats are known in a variety of designs. They are laid overlapping with adjacent reinforcement grids in concrete formwork, which are then filled with heavy concrete.
  • At least some of the cross bars have at least one end section which lies between two crossing points with the longitudinal bars of the overlap area outside the cross bar axis. Extending outside the bar axis is understood to mean that the end section has at least one region lying or bent obliquely to the axis of the cross bar, which increases the bond effect with the concrete.
  • the end sections are corrugated parallel to the plane of the longitudinal bars, so that the transverse bars are readily associated with the longitudinal bars in the usual way
  • the corrugation can take place in any way, for example in the form of a sine curve or in a zigzag.
  • One embodiment provides that the wave height, ie the deviation from the rod axis, is at the end of the crossbar increases.
  • the number of cross bars provided with end sections extending outside the bar axis can be different for each reinforcement grid.
  • End sections of the cross bars are wound helically.
  • the end sections are thus designed like a corkscrew.
  • Reinforcement meshes according to the invention can be produced in conventional automatic strengthening systems, in which the cross bars are also removed from rings.
  • An area is corrugated, and the corrugated area is preferably cut into two corrugated end sections, which are then welded to the respective longitudinal bars in cycles.
  • Crossbars with end sections corrugated on one side can also be alternately provided in both overlap areas.
  • FIGS. 1 and 2 show a detail of top views of left longitudinal edge areas of reinforcement mats in two different versions
  • FIGS. 3 to 5 cross sections through the longitudinal edge areas in three different versions
  • FIG. 6 shows an end view with a schematic representation of the composite effect 1 and 3 or 2 and 3
  • FIG. 7 shows a corresponding end view of an embodiment according to FIGS. 1 and 4, 1 and 5, 2 and 4, or 2 and 5.
  • a reinforcement grid according to the invention has straight longitudinal bars 1 lying in one plane and transverse bars 2 lying above them, which are welded to one another at the crossing points.
  • the reinforcement grids are intended for overlapping laying with further reinforcement grids, which results in an overlap area 4 on each longitudinal edge.
  • the end section 3 of at least some cross bars 2 runs in the overlap region 4 outside the axis of the otherwise straight cross bar 2, with only one end section 3 of such a cross bar 2 in the drawing figures and the areas of the longitudinal bars 1 directly adjoining the crossing points are shown.
  • the end section 3 of the crossbar 2 can, for example, be corrugated in accordance with FIG. 3 in the lattice plane, the plane corrugation according to FIG. 1 remaining the same or increasing according to FIG. 2 towards the end of the crossbar 2.
  • composite action lines to the surrounding concrete 5, as shown schematically in FIG. 6, lie in an elliptical area, the longer axis of which is caused by three rod diameters if the shaft height and the shaft depth are each one rod diameter.
  • the end sections 3 of the cross bars 2 can also be corrugated perpendicular to the grating plane, the combination of the corrugations according to FIGS. 1 and 5 providing a corkscrew-like design.
  • the associated composite action lines for the surrounding concrete 5 are shown schematically in FIG. 7.
  • the area is circular, but at least half as large as in the case of a straight end section 3 lying in the axis. cuts, the width of the overlap of two reinforcement grids can be reduced to half the usual size.
  • the distances between the longitudinal bars 1 can be smaller in the overlap area 4 than in the rest of the reinforcement grid, as indicated in FIG. 1, 3 or 5 by the additional, central longitudinal bars 1.

Abstract

To improve the anchorage in concrete of a reinforcing steel mesh with straight longitudinal bars (1) in one plane and with straight cross bars (2) connecting the longitudinal bars (1), at least some of the cross bars (2) are wound in a wavy or helicoid line in their end section (3) outside the bar axis.

Description

Bewehrungsgitter Reinforcement mesh
Die Erfindung betrifft ein Bewehrungsgitter mit in einer Ebene angeordneten, geraden Längsstäben und mit geraden Querstäben, die mit den Längsstäben in Kreu¬ zungspunkten verbunden sind, wobei an zumindest einer Längsseite des Bewehrungsgitters ein Über¬ deckungsbereich gegeben ist.The invention relates to a reinforcement grid with straight longitudinal bars arranged in one plane and with straight cross bars which are connected to the longitudinal bars at intersection points, with an overlap area being provided on at least one longitudinal side of the reinforcement grid.
Derartige Bewehrungsgitter bzw. Bewehrungsmatten sind in einer Vielzahl von Ausführungen bekannt. Sie werden überdeckend mit benachbarten Bewehrungsgittern in Be¬ tonschalungen verlegt, die anschließend mit Schwerbeton gefüllt werden.Such reinforcement grids or reinforcement mats are known in a variety of designs. They are laid overlapping with adjacent reinforcement grids in concrete formwork, which are then filled with heavy concrete.
Um die Betonverankerung der Bewehrungsgitter im Über¬ deckungsbereich zu erhöhen, wird erfindungsgemäß vorge¬ schlagen, daß zumindest einige der Querstäbe zumindest einen Endabschnitt aufweisen, der zwischen zwei Kreu- zungspunkten mit den Längsstäben des Über¬ deckungsbereiches außerhalb der Querstabachse liegt. Unter außerhalb der Stabachse verlaufend wird dabei verstanden, daß der Endabschnitt mindestens einen schräg zur Achse des Querstabes liegenden bzw. geboge- nen Bereich aufweist, der die Verbundwirkung mit dem Beton erhöht.In order to increase the concrete anchoring of the reinforcement mesh in the overlap area, it is proposed according to the invention that at least some of the cross bars have at least one end section which lies between two crossing points with the longitudinal bars of the overlap area outside the cross bar axis. Extending outside the bar axis is understood to mean that the end section has at least one region lying or bent obliquely to the axis of the cross bar, which increases the bond effect with the concrete.
Die Endabschnitte sind in einer ersten Ausführung par¬ allel zur Ebene der Längsstäbe gewellt, sodaß die Quer- stäbe ohne weiteres mit den Längsstäben in üblicherIn a first embodiment, the end sections are corrugated parallel to the plane of the longitudinal bars, so that the transverse bars are readily associated with the longitudinal bars in the usual way
Weise verbindbar, insbesondere verschweißbar sind. Da¬ bei kann die Wellung in beliebiger Weise, etwa in Form einer Sinuskurve oder im Zickzack, erfolgen. Eine Aus¬ führung sieht dabei vor, daß die Wellenhöhe, also die Abweichung von der Stabachse, zum Ende des Querstabes hin zunimmt. Die Anzahl der mit außerhalb der Stabachse verlaufenden Endabschnitten versehenen Querstäbe pro Bewehrungsgitter kann verschieden sein.Can be connected, in particular welded. The corrugation can take place in any way, for example in the form of a sine curve or in a zigzag. One embodiment provides that the wave height, ie the deviation from the rod axis, is at the end of the crossbar increases. The number of cross bars provided with end sections extending outside the bar axis can be different for each reinforcement grid.
Eine weitere bevorzugte Ausführung sieht vor, daß dieAnother preferred embodiment provides that the
Endabschnitte der Querstäbe schraubenlinienartig gewun¬ den sind. Die Endabschnitte sind somit nach Art eines Korkenziehers gestaltet.End sections of the cross bars are wound helically. The end sections are thus designed like a corkscrew.
Erfindungsgemäße Bewehrungsgitter können in üblichen automatischen Festigungsanlagen produziert werden, in denen auch die Querstäbe von Ringen abgezogen werden. Dabei wird ein Bereich gewellt, und der gewellte Be¬ reich vorzugsweise in zwei gewellte Endabschnitte ge- schnitten, die dann taktweise mit den jeweiligen Längs¬ stäben verschweißt werden. Es ist aber auch denkbar, nur einseitig einen gewellten Endabschnitt vorzusehen. Querstäbe mit nur einseitig gewellten Endabschnitten können auch wechselweise in beiden Überdeckungsberei- chen vorgesehen werden.Reinforcement meshes according to the invention can be produced in conventional automatic strengthening systems, in which the cross bars are also removed from rings. An area is corrugated, and the corrugated area is preferably cut into two corrugated end sections, which are then welded to the respective longitudinal bars in cycles. However, it is also conceivable to provide a corrugated end section on only one side. Crossbars with end sections corrugated on one side can also be alternately provided in both overlap areas.
Nachstehend wird nun die Erfindung an Hand der Figuren der beiliegenden Zeichnung näher beschrieben, ohne dar¬ auf beschränkt zu sein.The invention will now be described in more detail below with reference to the figures in the accompanying drawing, without being limited thereto.
Die Fig. 1 und 2 zeigen im Ausschnitt Draufsichten auf linke Längsrandbereiche von Bewehrungsmatten in zwei verschiedenen Ausführungen, die Fig. 3 bis 5 Quer¬ schnitte durch die Längsrandbereiche in drei verschie- denen Ausführungen, die Fig.6 eine Stirnansicht mit schematischer Darstellung der Verbundwirkung zum Beton einer Ausführungen nach Fig. 1 und 3 bzw. 2 und 3, und die Fig. 7 eine entsprechende Stirnansicht einer Aus¬ führung nach Fig. 1 und 4, 1 und 5, 2 und 4, bzw. 2 und 5. Ein erfindungsgemäßes Bewehrungsgitter weist in einer Ebene liegende, gerade Längsstäbe 1 und darüber lie¬ gende Querstäbe 2 auf, die an den Kreuzungspunkten mit- einander verschweißt sind. Die Bewehrungsgitter sind zur überlappenden Verlegung mit weiteren Bewehrungsgit¬ tern bestimmt, woraus sich ein Überdeckungsbereich 4 an jedem Längsrand ergibt. Der Endabschnitt 3 zumindest einiger Querstäbe 2 verläuft im Überdeckungsbereich 4 außerhalb der Achse des sonst geraden Querstabes 2, wo¬ bei in den Zeichnungsfiguren jeweils nur ein Endab¬ schnitt 3 eines derartigen Querstabes 2 und die unmit¬ telbar an die Kreuzungspunkte anschließenden Bereiche der Längsstäbe 1 gezeigt sind.1 and 2 show a detail of top views of left longitudinal edge areas of reinforcement mats in two different versions, FIGS. 3 to 5 cross sections through the longitudinal edge areas in three different versions, and FIG. 6 shows an end view with a schematic representation of the composite effect 1 and 3 or 2 and 3, and FIG. 7 shows a corresponding end view of an embodiment according to FIGS. 1 and 4, 1 and 5, 2 and 4, or 2 and 5. A reinforcement grid according to the invention has straight longitudinal bars 1 lying in one plane and transverse bars 2 lying above them, which are welded to one another at the crossing points. The reinforcement grids are intended for overlapping laying with further reinforcement grids, which results in an overlap area 4 on each longitudinal edge. The end section 3 of at least some cross bars 2 runs in the overlap region 4 outside the axis of the otherwise straight cross bar 2, with only one end section 3 of such a cross bar 2 in the drawing figures and the areas of the longitudinal bars 1 directly adjoining the crossing points are shown.
Der Endabschnitt 3 des Querstabes 2 kann beispielsweise gemäß Fig. 3 in der Gitterebene gewellt sein, wobei die ebene Wellung gemäß Fig. 1 gleich bleiben oder gemäß Fig. 2 zum Ende des Querstabes 2 hin zunehmen kann. In diesen Beispielen liegen Verbundwirkungslinien zum um¬ gebenden Beton 5, wie in Fig. 6 schematisch gezeigt, in einem elliptischen Bereich, wobei dessen längere Achse durch drei Stabdurchmesser bedingt ist, wenn die Wel¬ lenhöhe und die Wellentiefe jeweils einen Stabdurch- messer betragen.The end section 3 of the crossbar 2 can, for example, be corrugated in accordance with FIG. 3 in the lattice plane, the plane corrugation according to FIG. 1 remaining the same or increasing according to FIG. 2 towards the end of the crossbar 2. In these examples, composite action lines to the surrounding concrete 5, as shown schematically in FIG. 6, lie in an elliptical area, the longer axis of which is caused by three rod diameters if the shaft height and the shaft depth are each one rod diameter.
Wie die Fig. 4 und 5 zeigen, können die Endabschnitte 3 der Querstäbe 2 zusätzlich auch senkrecht zur Gitter¬ ebene gewellt sein, wobei die Kombination der Wellungen nach den Fig. 1 und 5 eine korkenzieherartige Ausbil¬ dung liefert. Die zugehörigen Verbundwirkungslinien zum umgebenden Beton 5 sind schematisch in Fig. 7 gezeigt. Der Bereich ist kreisrund, jedoch zumindest um die Hälfte größer als bei einem in der Achse liegenden ge- raden Endabschnitt 3. Dank der Wellung der Endab- schnitte kann die Breite der Überlappung zweier Beweh¬ rungsgitter bis auf die Hälfte des bisher üblichen Aus¬ maßes verringert werden. Die Abstände zwischen den Längsstäben 1 können im Überdeckungsbereich 4 geringer als im übrigen Bewehrungsgitter sein, wie in Fig. 1, 3 oder 5 durch die zusätzlichen, mittleren Längsstäbe 1 angedeutet. 4 and 5 show, the end sections 3 of the cross bars 2 can also be corrugated perpendicular to the grating plane, the combination of the corrugations according to FIGS. 1 and 5 providing a corkscrew-like design. The associated composite action lines for the surrounding concrete 5 are shown schematically in FIG. 7. The area is circular, but at least half as large as in the case of a straight end section 3 lying in the axis. cuts, the width of the overlap of two reinforcement grids can be reduced to half the usual size. The distances between the longitudinal bars 1 can be smaller in the overlap area 4 than in the rest of the reinforcement grid, as indicated in FIG. 1, 3 or 5 by the additional, central longitudinal bars 1.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Bewehrungsgitter mit in einer Ebene angeordneten, geraden Längsstäben und mit geraden Querstäben, die mit den Längsstäben in Kreuzungspunkten ver¬ bunden sind, wobei an zumindest einer Längsseite des Bewehrungsgitters ein Überdeckungsbereich ge- geben ist, dadurch gekennzeichnet, daß zumindest einige der Querstäbe (2) zumindest einen Endab¬ schnitt (3) aufweisen, der zwischen zwei Kreu¬ zungspunkten mit den Längsstäben (1) des Über¬ deckungsbereiches (4) außerhalb der Querstabachse liegt.1. Reinforcement mesh with straight longitudinal bars arranged in one plane and with straight cross bars that are connected to the longitudinal bars at intersection points, with an overlap area being provided on at least one long side of the reinforcement mesh, characterized in that at least some of the cross bars ( 2) have at least one end section (3), which lies between two crossing points with the longitudinal bars (1) of the overlap area (4) outside the crossbar axis.
2. Bewehrungsgitter nach Anspruch 1, dadurch gekenn¬ zeichnet, daß die Endabschnitte (3) der Querstäbe (2) parallel zur Ebene der Längsstäbe (1) gewellt sind, wobei die Wellenhöhe zum Längsrand des Über¬ deckungsbereiches (4) vorzugsweise zunimmt.2. Reinforcement mesh according to claim 1, characterized gekenn¬ characterized in that the end portions (3) of the cross bars (2) are corrugated parallel to the plane of the longitudinal bars (1), the wave height to the longitudinal edge of the covering area (4) preferably increases.
3. Bewehrungsgitter nach Anspruch 1, dadurch gekenn¬ zeichnet, daß die Endabschnitte (3) der Querstäbe (2) schraubenlinienartig gewunden sind. 3. Reinforcement mesh according to claim 1, characterized gekenn¬ characterized in that the end portions (3) of the cross bars (2) are wound helically.
PCT/EP1994/003620 1993-11-09 1994-11-04 Reinforcing steel mesh for concrete WO1995013440A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT227493 1993-11-09
ATA2274/93 1993-11-09

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Publication Number Publication Date
WO1995013440A1 true WO1995013440A1 (en) 1995-05-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011107848A2 (en) * 2010-03-02 2011-09-09 Anil Krishna Kar Improved reinforcing bar and method for manufacturing the same
FR3104569A1 (en) 2019-12-16 2021-06-18 Saint-Gobain Adfors Textile structure based on glass fibers with parylene coating

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR886983A (en) * 1940-12-30 1943-10-29 Process for anchoring pre-tensioned reinforcing wires in the manufacture of reinforced concrete
FR887116A (en) * 1942-09-21 1943-11-04 Process for increasing the bond strength of steel wires in the production of pre-tensioned concrete parts
FR1169408A (en) * 1957-03-13 1958-12-29 Tension iron serving as reinforcement for reinforced concrete
DE1509046A1 (en) * 1963-03-15 1969-03-13 Baustahlgewebe Gmbh Welded wire mesh
DE2354132A1 (en) * 1973-10-29 1975-05-07 Rehm Gallus Steel concrete-reinforcing mesh - with loop bends contour matching cross-section of cross-running rods
FR2270410A1 (en) * 1974-03-05 1975-12-05 Vigliano Marcel Steel reinforcement for concrete slabs - has side by side coils with turns interconnected, overlapping or tangential
DE3513235A1 (en) * 1984-04-19 1985-10-31 Franz Dipl.-Ing. Innsbruck Bucher Reinforcing mat or the like
DE3524700A1 (en) * 1984-07-19 1986-01-30 Vorspann-Technik GmbH, Salzburg Anchoring knot on a tensioning cord and method for manufacturing the same as well as device for implementing the method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR886983A (en) * 1940-12-30 1943-10-29 Process for anchoring pre-tensioned reinforcing wires in the manufacture of reinforced concrete
FR887116A (en) * 1942-09-21 1943-11-04 Process for increasing the bond strength of steel wires in the production of pre-tensioned concrete parts
FR1169408A (en) * 1957-03-13 1958-12-29 Tension iron serving as reinforcement for reinforced concrete
DE1509046A1 (en) * 1963-03-15 1969-03-13 Baustahlgewebe Gmbh Welded wire mesh
DE2354132A1 (en) * 1973-10-29 1975-05-07 Rehm Gallus Steel concrete-reinforcing mesh - with loop bends contour matching cross-section of cross-running rods
FR2270410A1 (en) * 1974-03-05 1975-12-05 Vigliano Marcel Steel reinforcement for concrete slabs - has side by side coils with turns interconnected, overlapping or tangential
DE3513235A1 (en) * 1984-04-19 1985-10-31 Franz Dipl.-Ing. Innsbruck Bucher Reinforcing mat or the like
DE3524700A1 (en) * 1984-07-19 1986-01-30 Vorspann-Technik GmbH, Salzburg Anchoring knot on a tensioning cord and method for manufacturing the same as well as device for implementing the method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011107848A2 (en) * 2010-03-02 2011-09-09 Anil Krishna Kar Improved reinforcing bar and method for manufacturing the same
WO2011107848A3 (en) * 2010-03-02 2011-11-03 Anil Krishna Kar Improved reinforcing bar and method for manufacturing the same
CN102782229A (en) * 2010-03-02 2012-11-14 阿尼尔·克里希纳·卡尔 Improved reinforcing bar and method for manufacturing the same
CN102782229B (en) * 2010-03-02 2016-03-02 阿尼尔·克里希纳·卡尔 For improving the improvement reinforcing rib in reinforced concrete structure life-span
FR3104569A1 (en) 2019-12-16 2021-06-18 Saint-Gobain Adfors Textile structure based on glass fibers with parylene coating
WO2021123583A1 (en) 2019-12-16 2021-06-24 1/1Saint-Gobain Adfors Glass-fibre textile structure with parylene coating

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