EP0601426A1 - Multiple-part steel bars, in particular reinforcement bars, tension rods, anchorage bars or similar - Google Patents

Multiple-part steel bars, in particular reinforcement bars, tension rods, anchorage bars or similar Download PDF

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Publication number
EP0601426A1
EP0601426A1 EP93119168A EP93119168A EP0601426A1 EP 0601426 A1 EP0601426 A1 EP 0601426A1 EP 93119168 A EP93119168 A EP 93119168A EP 93119168 A EP93119168 A EP 93119168A EP 0601426 A1 EP0601426 A1 EP 0601426A1
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EP
European Patent Office
Prior art keywords
bar
partial
bars
wave
length
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EP93119168A
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German (de)
French (fr)
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EP0601426B1 (en
Inventor
Max Dipl.-Ing. Aicher
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Stahlwerk Annahuette Max Aicher & Co Kg GmbH
Stahlwerk Annahuette Max Aicher GmbH and Co KG
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Stahlwerk Annahuette Max Aicher & Co Kg GmbH
Stahlwerk Annahuette Max Aicher GmbH and Co KG
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    • 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
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction

Definitions

  • the invention relates to a multi-part steel rod, in particular concrete reinforcement rod, tie rod, anchor rod or the like.
  • Reinforcement elements in construction consist of one or more part systems, such as Single bars or bundles of several individual elements. These systems are usually used side by side depending on the intended use.
  • Reinforcement elements for reinforced concrete usually consist of individual steel bars that are embedded in the concrete of the relevant component.
  • Tendons for prestressed concrete can each consist of a single element, e.g. also a steel rod, or a bundle of several individual elements, e.g. Steel wires or steel wire strands, which are arranged in cladding tubes to secure their longitudinal mobility for prestressing against the hardened concrete.
  • the tendons can subsequently be combined with the relevant component by injecting cement glue or - with pre-tensioning without bond - injected with a corrosion protection compound for reasons of corrosion protection.
  • One-piece systems such as steel rods, have the advantage that they are provided with a screw thread and can thus be anchored directly by screwing on anchoring bodies or can be lengthened by means of sleeves.
  • wedge anchors are usually used for anchoring, with either each element individually or all elements being able to be tensioned and anchored.
  • the object of the invention is to achieve greater security against failure of the entire system in a one-piece system, such as a steel rod.
  • a hot-rolled concrete reinforcement or anchor rod is known consists of two or more parallel to each other and complementary to a total cross-section with a circular envelope of the additional partial rods, in each of which a thread-like ribbing suitable for the engagement of anchoring means is arranged on the outer surface of the entire rod (DE-AS 18 13 627).
  • Two or more individual elements which can also have an oval cross section, are thus connected to form a system which can be handled like a one-piece system, but in which each individual element nevertheless works for itself.
  • Oblique ribs are indeed arranged on the inner contact surfaces of the partial rods; but this is only intended to ensure that the partial bars are completely enclosed by grouting material during subsequent grouting with mortar.
  • a concrete reinforcement bar with hot-rolled, helically extending ribs which are arranged on two opposite sides of the bar circumference and form parts of a thread, the longitudinal section of the bar in the area of the ribs showing a regular smooth undulating course in which the wave crests the ribs and the troughs between the ribs form troughs in the otherwise circular core cross section (DE 35 17 638 C2).
  • the advantages of this rebar are primarily in the manufacturing process.
  • the flat troughs are intended to act as pressure points during rolling, through which the threaded ribs can be filled with material more easily and, above all, more evenly.
  • the rounded shape of the ribs is also said to promote the filling of the ribs during rolling.
  • the cross-sectional area of the rod is practically constant over its length, which is also advantageous for the rolling process.
  • the invention makes a reinforcement element that can be handled like a one-piece system, but is still a multi-piece proposed, in which the partial rods enter into a positive connection with one another over their entire length as a result of the profiling on their inner contact surfaces.
  • redundancy of the reinforcement elements is unknown for the first time in construction. Due to the evenly wavy profile, the partial rods with their inner contact surfaces fit exactly to one another, so that a force transmission from one partial rod to the other partial rod is ensured, provided that both rods are fixed against separation from one another.
  • the fixation In the case of a reinforcement element concreted in, this fixation is readily provided by the concrete surrounding the reinforcement element.
  • the fixation can be achieved in the normal course by means of a cladding tube, which in turn is concreted in and injected with cement mortar;
  • the fixation In the anchoring area, the fixation can be achieved by an anchoring body, generally referred to as a nut, which has a continuous internal thread corresponding to the profiling of the partial rods.
  • the length of the wave crests is expediently shorter in the internal thread of the nut and the length of the wave troughs is somewhat longer than the same length of the wave crests and wave troughs of the partial bars.
  • the steel rod 1 shown in FIGS. 1 to 3 consists of two partial rods 2 and 3, which are each of the same design. As can be seen in FIG. 1, the partial rods 2 and 3 have an essentially oval cross section with two opposing curved side surfaces 4 and 5 or 6 and 7 and straight or slightly curved end surfaces 8 and 9.
  • the partial rods 2 and 3 are provided with a wave-shaped profile 10, which forms wave crests 11 and wave troughs 12 in between (FIGS. 1 and 4).
  • the wave-shaped profiling 10 expediently follows a sine line, in which the wave crests 11 rise above the original circumference 13 of the rod core, indicated by dashed lines, and the wave troughs 12 form troughs below the circumference 13 of the rod core.
  • the profile 10 is uniform; the length l of the wave crests 11 and the wave troughs 12 is the same.
  • the profiling 10 follows a helical line, so that the wave crests 11 ribs and the wave troughs 12 fillets of a screwable thread.
  • the two sub-bars 2 and 3 are, as can be seen above all from Fig. 2, with their inwardly directed side surfaces 5 and 6 placed close to each other so that the crests 11 of a sub-bar 2 or 3 exactly in the troughs 12 of the adjacent Sub-bar 3 or 2 fit and vice versa.
  • the two bars 2 and 3 are positively interlocked with each other in the axial direction.
  • annular enclosure which, in the embodiment shown in FIGS. 2 and 3, consists of a nut 14 which has an internal thread 15 corresponding to the thread-like profile 10 of the bars 2 and 3.
  • the nut 14 stands here, for example, for an anchoring body that can be supported, for example, against an abutment plate, as well as for an encircling element or a connecting element arranged at any point along the length of the steel rod 1, e.g. a sleeve.
  • the profile of the internal thread 15 of the nut 14 has the same pitch s as the profile 10 of the partial bars 2 and 3, only due to the different diameter of the thread formed by the profiles 10 or the internal thread 15, the inclination of the threads to the longitudinal axis of the steel rod 1 for the partial bars 2 and 3 larger than for the nut 14.
  • the profiling of the internal thread 15 on the inside of the nut 14 basically follows the profiling 10 on the side surfaces 4, 5 or 6, 7 of the partial rods 2 and 3.
  • the measured between the turning points length l 1 of the wave crests 16 is less and the length l 2 of the wave troughs 17 is greater than the corresponding, respectively identical length l of the rods 2 and 3.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

A multipart steel bar, in particular a concrete-reinforcing bar, comprises two identical bar pieces (2, 3) which have an approximately oval cross-section and a thread-like, corrugated profiling (10) on the curved side surfaces. The bar pieces (2, 3) are arranged such that they are parallel to one another and make contact with one another in the longitudinal direction in such a manner that a corrugation peak of one bar piece (2) comes to lie in a corrugation valley of the other bar piece (3), said bar pieces (2, 3) forming an overall cross-section with a circular envelope. At least over sub-regions of their length, the bar pieces (2, 3) are fixed by an enclosing device (14) which prevents the bar pieces from separating from one another under loading and may exhibit a corresponding internal thread. The reinforcing bar thus forms a reinforcing element which, although it can be handled as a single-part system, is a multipart element, in the case of which the bar pieces, as a result of the profiling on their inner contact surface, undergo a mutual positively locking connection over their entire length, this permitting, in the installed state, a redundancy of the reinforcing elements which has been unknown in the building industry hitherto. <IMAGE>

Description

Die Erfindung betrifft einen mehrteiligen Stahlstab, insbesondere Betonbewehrungsstab, Spannstab, Ankerstab oder dergleichen.The invention relates to a multi-part steel rod, in particular concrete reinforcement rod, tie rod, anchor rod or the like.

Bewehrungselemente im Bauwesen, wie z.B. schlaffe Bewehrungen für Stahlbeton, Spannglieder für Spannbeton, Zug- oder Druckglieder für Erd- und Felsanker bzw. Pfähle usw. bestehen aus ein- oder mehrteiligen Systemen, wie z.B. Einzelstäben oder Bündeln aus mehreren Einzelelementen. Üblicherweise werden diese Systeme je nach Verwendungszweck nebeneinander verwendet. Bewehrungselemente für Stahlbeton bestehen in der Regel aus einzelnen Stahlstäben, die in den Beton des betreffenden Bauteils eingebettet sind. Spannglieder für Spannbeton können aus jeweils einem Einzelelement, z.B. ebenfalls einem Stahlstab, oder aus einem Bündel aus mehreren Einzelelementen, wie z.B. Stahldrähten oder Stahldrahtlitzen, bestehen, die zur Sicherung ihrer Längsbeweglichkeit zum Vorspannen gegen den erhärteten Beton in Hüllrohren angeordnet sind. Die Spannglieder können nachträglich durch Injizieren von Zementleim in Verbund mit dem betreffenden Bauteil gebracht oder - bei Vorspannung ohne Verbund - aus Gründen des Korrosionsschutzes mit einer Korrosionsschutzmasse injiziert werden.Reinforcement elements in construction, e.g. slack reinforcements for reinforced concrete, tendons for prestressed concrete, tension or compression elements for ground and rock anchors or piles etc. consist of one or more part systems, such as Single bars or bundles of several individual elements. These systems are usually used side by side depending on the intended use. Reinforcement elements for reinforced concrete usually consist of individual steel bars that are embedded in the concrete of the relevant component. Tendons for prestressed concrete can each consist of a single element, e.g. also a steel rod, or a bundle of several individual elements, e.g. Steel wires or steel wire strands, which are arranged in cladding tubes to secure their longitudinal mobility for prestressing against the hardened concrete. The tendons can subsequently be combined with the relevant component by injecting cement glue or - with pre-tensioning without bond - injected with a corrosion protection compound for reasons of corrosion protection.

Einteilige Systeme, wie z.B. Stahlstäbe, haben den Vorteil, daß sie mit Schraubgewinde versehen und so durch Aufschrauben von Verankerungskörpern unmittelbar verankert oder durch Muffen verlängert werden können. Bei mehrteiligen Systemen, wie z.B. Litzenbündeln, werden zur Verankerung üblicherweise Keilverankerungen verwendet, wobei entweder jedes Element einzeln oder alle Elemente gemeinsam gespannt und verankert werden können.One-piece systems, such as steel rods, have the advantage that they are provided with a screw thread and can thus be anchored directly by screwing on anchoring bodies or can be lengthened by means of sleeves. In multi-part systems, such as bundles of strands, wedge anchors are usually used for anchoring, with either each element individually or all elements being able to be tensioned and anchored.

Die Sicherheit von Bauwerken aus Stahl- oder Spannbeton hängt ganz wesentlich vom Bestand der Bewehrungselemente ab. Der die Bewehrungselemente umhüllende Beton, bei Spanngliedern der die Spannkanäle zur Herstellung eines nachträglichen Verbundes ausfüllende Zementmörtel, wirkt zwar korrosionsverhindernd. Gleichwohl liegen diese Bewehrungen unzugänglich und deshalb unkontrollierbar, wenn sie sich im Verbund mit dem betreffenden Bauteil befinden, auch nicht auswechselbar innerhalb des Bauwerks, so daß etwaige, den Bestand gefährdende Schäden, z.B. durch Korrosion, von außen nicht feststellbar sind. Zur Gewährleistung der Sicherheit behilft man sich deshalb damit, bei der Bemessung der Bewehrungseinlagen bzw. bei der Festsetzung der zulässigen Spannungen einen Sicherheitszuschlag in Ansatz zu bringen. Gleichwohl begegnen einteilige Systeme vor allem bei den Baubehörden immer stärkerer Skepsis, weil beim Versagen eines solchen Systems sofort das gesamte System ausfällt. Fällt demgegenüber bei mehrteiligen Systemen, z.B. einem Bündelspannglied, ein Element aus, können die übrigen Elemente die Sicherheit weiter gewährleisten.The safety of structures made of reinforced or prestressed concrete depends to a large extent on the existence of the reinforcement elements. The concrete enveloping the reinforcement elements, in the case of tendons the cement mortar filling the prestressing channels to produce a subsequent bond, does have a corrosion-preventing effect. Nevertheless, these reinforcements are inaccessible and therefore uncontrollable, if they are in connection with the relevant component, also not interchangeable within the structure, so that any damage that could endanger the existence, e.g. due to corrosion, cannot be determined from the outside. To ensure safety, one therefore helps by applying a safety margin when dimensioning the reinforcement inserts or when setting the permissible stresses. Nonetheless, one-piece systems are becoming increasingly skeptical, especially with the building authorities, because if such a system fails, the entire system immediately fails. On the other hand, if there are multi-part systems a bundle tendon, one element, the other elements can further ensure safety.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, bei einem einteiligen System, wie es beispielsweise einem Stahlstab entspricht, eine größere Sicherheit gegen Versagen des gesamten Systems zu erreichen.Against this background, the object of the invention is to achieve greater security against failure of the entire system in a one-piece system, such as a steel rod.

Zur Lösung dieser Aufgabe dient erfindungsgemäß die im Patentanspruch 1 angegebene Merkmalskombination.According to the invention, the combination of features specified in claim 1 is used to achieve this object.

Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.Advantageous further developments result from the subclaims.

Die Erfindung greift bei dieser Lösung teilweise zurück auf zwei an sich bekannte Gestaltungen. So ist einerseits ein warmgewalzter Betonbewehrungs- oder Ankerstab bekannt, der aus zwei oder mehr parallel zueinander verlaufenden und sich zu einem Gesamtquerschnitt mit kreisförmiger Umhüllender ergänzenden Teilstäben besteht, bei dem jeweils an der Außenfläche des Gesamtstabes eine für den Eingriff von Verankerungsmitteln geeignete gewindeartige Rippung angeordnet ist (DE-AS 18 13 627). Zwei oder mehr Einzelelemente, die auch ovalen Querschnitt haben können, sind so zu einem System verbunden, das zwar wie ein einteiliges System handhabbar ist, bei dem aber dennoch jedes Einzelelement für sich wirkt. An den inneren Berührungsflächen der Teilstäbe sind zwar Schrägrippen angeordnet; durch diese soll aber nur erreicht werden, daß die Teilstäbe beim nachträglichen Verpressen mit Mörtel vollständig von Verpreßmaterial umschlossen werden.With this solution, the invention partly makes use of two designs known per se. On the one hand, a hot-rolled concrete reinforcement or anchor rod is known consists of two or more parallel to each other and complementary to a total cross-section with a circular envelope of the additional partial rods, in each of which a thread-like ribbing suitable for the engagement of anchoring means is arranged on the outer surface of the entire rod (DE-AS 18 13 627). Two or more individual elements, which can also have an oval cross section, are thus connected to form a system which can be handled like a one-piece system, but in which each individual element nevertheless works for itself. Oblique ribs are indeed arranged on the inner contact surfaces of the partial rods; but this is only intended to ensure that the partial bars are completely enclosed by grouting material during subsequent grouting with mortar.

Weiterhin ist ein Betonbewehrungsstab mit warmgewalzten, schraubenlinienförmig verlaufenden Rippen bekannt, die an zwei einander gegenüberliegenden Seiten des Stabumfanges angeordnet sind und Teile eines Gewindes bilden, wobei der Längsschnitt des Stabes im Bereich der Rippen einen regelmäßigen glatten wellenförmigen Verlauf zeigt, in dem die Wellenberge die Rippen und die zwischen den Rippen gelegenen Wellentäler Mulden in dem ansonsten kreisförmigen Kernquerschnitt bilden (DE 35 17 638 C2). Die Vorteile dieses Bewehrungsstabes liegen vor allem im Herstellungsverfahren. Die flachen Mulden sollen beim Walzen als Druckstellen wirken, durch die die Gewinderippen leichter und vor allem gleichmäßiger mit Material ausgefüllt werden können. Durch die abgerundete Form der Rippen soll außerdem das Auffüllen der Rippen beim Walzen begünstigt werden. Die Querschnittsfläche des Stabes ist über dessen Länge praktisch konstant, was für den Walzvorgang ebenfalls vorteilhaft ist.Furthermore, a concrete reinforcement bar with hot-rolled, helically extending ribs is known, which are arranged on two opposite sides of the bar circumference and form parts of a thread, the longitudinal section of the bar in the area of the ribs showing a regular smooth undulating course in which the wave crests the ribs and the troughs between the ribs form troughs in the otherwise circular core cross section (DE 35 17 638 C2). The advantages of this rebar are primarily in the manufacturing process. The flat troughs are intended to act as pressure points during rolling, through which the threaded ribs can be filled with material more easily and, above all, more evenly. The rounded shape of the ribs is also said to promote the filling of the ribs during rolling. The cross-sectional area of the rod is practically constant over its length, which is also advantageous for the rolling process.

Mit der Erfindung wird ein zwar wie ein einteiliges System handhabbares, aber dennoch mehrteiliges Bewehrungselement vorgeschlagen, bei dem die Teilstäbe infolge der Profilierung an ihren inneren Berührungsflächen über ihre gesamte Länge eine formschlüssige Verbindung miteinander eingehen. Dadurch wird im eingebauten Zustand erstmals eine im Bauwesen bislang unbekannte Redundanz der Bewehrungselemente erreicht. Durch den gleichmäßig wellenförmigen Verlauf der Profilierung fügen sich die Teilstäbe mit ihren inneren Berührungsflächen exakt aneinander, so daß eine Kraftübertragung von einem Teilstab auf den anderen Teilstab gewährleistet ist, sofern beide Stäbe gegen eine Trennung voneinander fixiert sind.The invention makes a reinforcement element that can be handled like a one-piece system, but is still a multi-piece proposed, in which the partial rods enter into a positive connection with one another over their entire length as a result of the profiling on their inner contact surfaces. As a result, when installed, redundancy of the reinforcement elements is unknown for the first time in construction. Due to the evenly wavy profile, the partial rods with their inner contact surfaces fit exactly to one another, so that a force transmission from one partial rod to the other partial rod is ensured, provided that both rods are fixed against separation from one another.

Diese Fixierung ist bei einem einbetonierten Bewehrungselement ohne weiteres durch den das Bewehrungselement umgebenden Beton gegeben. Bei einem Spannglied kann die Fixierung im normalen Verlauf durch ein Hüllrohr erreicht werden, das seinerseits einbetoniert und mit Zementmörtel injiziert wird; im Verankerungsbereich kann die Fixierung durch einen Verankerungskörper, allgemein als Mutter bezeichnet, erreicht werden, der ein der Profilierung der Teilstäbe entsprechendes durchgehendes Innengewinde aufweist. Um das zum Aufschrauben der Mutter erforderliche Spiel zu schaffen, ist bei dem Innengewinde der Mutter zweckmäßig die Länge der Wellenberge etwas kürzer und die Länge der Wellentäler etwas länger ausgebildet als die jeweils gleiche Länge der Wellenberge und Wellentäler der Teilstäbe.In the case of a reinforcement element concreted in, this fixation is readily provided by the concrete surrounding the reinforcement element. In the case of a tendon, the fixation can be achieved in the normal course by means of a cladding tube, which in turn is concreted in and injected with cement mortar; In the anchoring area, the fixation can be achieved by an anchoring body, generally referred to as a nut, which has a continuous internal thread corresponding to the profiling of the partial rods. In order to create the play required for screwing on the nut, the length of the wave crests is expediently shorter in the internal thread of the nut and the length of the wave troughs is somewhat longer than the same length of the wave crests and wave troughs of the partial bars.

Die Erfindung wird nachstehend anhand der Zeichnung näher erläutert. Es zeigt

Fig. 1
einen Querschnitt durch einen aus zwei Teilstäben bestehenden Stahlstab gemäß der Erfindung,
Fig. 2
einen Längsschnitt durch den Stahlstab im Bereich einer Mutter,
Fig. 3
einen Querschnitt entlang der Linie III-III in Fig. 2 und
Fig. 4
den Profilverlauf an der Oberfläche eines Teilstabes und an der Innenseite der Mutter in auseinandergezogener vergrößerter Darstellung.
The invention is explained below with reference to the drawing. It shows
Fig. 1
3 shows a cross section through a steel rod according to the invention consisting of two partial rods,
Fig. 2
a longitudinal section through the steel rod in the area of a nut,
Fig. 3
a cross section along the line III-III in Fig. 2 and
Fig. 4
the profile course on the surface of a rod and on the inside of the nut in an exploded enlarged view.

Der in den Fig. 1 bis 3 dargestellte Stahlstab 1 besteht aus zwei Teilstäben 2 und 3, die jeweils gleich ausgebildet sind. Die Teilstäbe 2 und 3 besitzen, wie Fig. 1 erkennen läßt, im wesentlichen ovalen Querschnitt mit zwei einander gegenüberliegenden gekrümmten Seitenflächen 4 und 5 bzw. 6 und 7 und geraden oder schwach gekrümmten Stirnflächen 8 bzw. 9.The steel rod 1 shown in FIGS. 1 to 3 consists of two partial rods 2 and 3, which are each of the same design. As can be seen in FIG. 1, the partial rods 2 and 3 have an essentially oval cross section with two opposing curved side surfaces 4 and 5 or 6 and 7 and straight or slightly curved end surfaces 8 and 9.

Im Bereich der gekrümmten Seitenflächen 4 und 5 bzw. 6 und 7 sind die Teilstäbe 2 und 3 mit einer wellenförmigen Profilierung 10 versehen, die Wellenberge 11 und dazwischenliegende Wellentäler 12 bildet (Fig. 1 und Fig. 4). Die wellenförmige Profilierung 10 folgt zweckmäßig einer Sinuslinie, bei der sich die Wellenberge 11 über den - gestrichelt angedeuteten - ursprünglichen Umfang 13 des Stabkerns erheben und die Wellentäler 12 Mulden unterhalb des Umfangs 13 des Stabkerns bilden. Die Profilierung 10 ist gleichmäßig; die Länge l der Wellenberge 11 und der Wellentäler 12 ist gleich. Die Profilierung 10 folgt einer Schraubenlinie, so daß die Wellenberge 11 Rippen und die Wellentäler 12 Kehlen eines schraubbaren Gewindes bilden.In the area of the curved side surfaces 4 and 5 or 6 and 7, the partial rods 2 and 3 are provided with a wave-shaped profile 10, which forms wave crests 11 and wave troughs 12 in between (FIGS. 1 and 4). The wave-shaped profiling 10 expediently follows a sine line, in which the wave crests 11 rise above the original circumference 13 of the rod core, indicated by dashed lines, and the wave troughs 12 form troughs below the circumference 13 of the rod core. The profile 10 is uniform; the length l of the wave crests 11 and the wave troughs 12 is the same. The profiling 10 follows a helical line, so that the wave crests 11 ribs and the wave troughs 12 fillets of a screwable thread.

Die beiden Teilstäbe 2 und 3 sind, wie vor allem Fig. 2 erkennen läßt, mit ihren nach innen gerichteten Seitenflächen 5 und 6 einander berührend dicht aneinander gelegt, so daß die Wellenberge 11 eines Teilstabes 2 bzw. 3 genau in die Wellentäler 12 des benachbarten Teilstabes 3 bzw. 2 passen und umgekehrt. Die beiden Teilstäbe 2 und 3 sind so in axialer Richtung formschlüssig miteinander verzahnt.The two sub-bars 2 and 3 are, as can be seen above all from Fig. 2, with their inwardly directed side surfaces 5 and 6 placed close to each other so that the crests 11 of a sub-bar 2 or 3 exactly in the troughs 12 of the adjacent Sub-bar 3 or 2 fit and vice versa. The two bars 2 and 3 are positively interlocked with each other in the axial direction.

Dieser Formschluß läßt sich allerdings nur aufrecht erhalten, solange gewährleistet ist, daß die Teilstäbe 2 und 3 sich zum Beispiel bei unterschiedlichen Axialkräften nicht aus dem Formschluß voneinander lösen können. Dies wird durch eine ringförmige Umschließung erreicht, die in dem in den Fig. 2 und 3 dargestellten Ausführungsbeispiel aus einer Mutter 14 besteht, die ein der gewindeartigen Profilierung 10 der Stäbe 2 und 3 entsprechendes Innengewinde 15 aufweist. Die Mutter 14 steht hier beispielhaft für einen beispielsweise gegen eine Widerlagerplatte abstützbaren Verankerungskörper ebenso wie für ein an beliebigen Stellen entlang der Länge des Stahlstabes 1 angeordnetes Umschließungselement oder ein Verbindungselement, z.B. eine Muffe.However, this positive locking can only be maintained as long as it is ensured that the partial rods 2 and 3 cannot separate from the positive locking, for example with different axial forces. This is achieved by an annular enclosure which, in the embodiment shown in FIGS. 2 and 3, consists of a nut 14 which has an internal thread 15 corresponding to the thread-like profile 10 of the bars 2 and 3. The nut 14 stands here, for example, for an anchoring body that can be supported, for example, against an abutment plate, as well as for an encircling element or a connecting element arranged at any point along the length of the steel rod 1, e.g. a sleeve.

Die Profilierung des Innengewindes 15 der Mutter 14 besitzt die gleiche Steigung s wie die Profilierung 10 der Teilstäbe 2 und 3, nur ist infolge des unterschiedlichen Durchmessers des durch die Profilierungen 10 gebildeten Gewindes bzw. des Innengewindes 15 die Neigung der Gewindegänge zur Längsachse des Stahlstabes 1 bei den Teilstäben 2 und 3 größer als bei der Mutter 14.The profile of the internal thread 15 of the nut 14 has the same pitch s as the profile 10 of the partial bars 2 and 3, only due to the different diameter of the thread formed by the profiles 10 or the internal thread 15, the inclination of the threads to the longitudinal axis of the steel rod 1 for the partial bars 2 and 3 larger than for the nut 14.

Die Profilierung des Innengewindes 15 an der Innenseite der Mutter 14 folgt grundsätzlich der Profilierung 10 an den Seitenflächen 4, 5 bzw. 6, 7 der Teilstäbe 2 und 3. Um genügend Spiel zum Aufschrauben der Mutter 14 zu erreichen, ist - bei gleicher Gewindetiefe - die zwischen den Wendepunkten gemessene Länge l₁ der Wellenberge 16 geringer und die Länge l₂ der Wellentäler 17 größer als die entsprechende, jeweils gleiche Länge l der Stäbe 2 und 3.The profiling of the internal thread 15 on the inside of the nut 14 basically follows the profiling 10 on the side surfaces 4, 5 or 6, 7 of the partial rods 2 and 3. In order to achieve sufficient play for screwing on the nut 14, the measured between the turning points length l 1 of the wave crests 16 is less and the length l 2 of the wave troughs 17 is greater than the corresponding, respectively identical length l of the rods 2 and 3.

Claims (3)

Mehrteiliger Stahlstab, insbesondere Betonbewehrungsstab, Spannstab, Ankerstab oder dergleichen, gekennzeichnet durch die Kombination folgender Merkmale: a) der Stahlstab (1) besteht aus zwei gleich ausgebildeten Teilstäben (2, 3) mit etwa ovalem Querschnitt und gewindeartiger Profilierung (10) an den gekrümmten Seitenflächen (4, 5 bzw. 6, 7), b) die Profilierung (10) der Teilstäbe (2, 3) zeigt im Längsschnitt entlang einer Axialebene einen gleichmäßig wellenförmigen Verlauf, bei dem die Wellenberge (11) und die Wellentäler (12) jeweils die gleiche Länge (l) aufweisen, c) die Teilstäbe (2, 3) sind parallel zueinander und einander in Längsrichtung berührend so angeordnet, daß ein Wellenberg (11) des einen Teilstabes (2 bzw. 3) in ein Wellental (12) des anderen Teilstabes (3 bzw. 2) zu liegen kommt und daß sie einen Gesamtquerschnitt mit kreisförmiger Umhüllender bilden, wobei d) der Krümmungsradius der Seitenflächen (4, 5 bzw. 6, 7) der Teilstäbe (2, 3) dem Radius der Umhüllenden entspricht und e) die Teilstäbe (2, 3) zumindest über Teilbereiche ihrer Länge durch eine eine Trennung der Teilstäbe (2, 3) voneinander verhindernde Umschließung fixiert sind. Multi-part steel rod, in particular concrete reinforcement rod, tension rod, anchor rod or the like, characterized by the combination of the following features: a) the steel rod (1) consists of two identically designed partial rods (2, 3) with an approximately oval cross-section and thread-like profiling (10) on the curved side surfaces (4, 5 and 6, 7), b) the profiling (10) of the partial rods (2, 3) shows in longitudinal section along an axial plane a uniform wave-like course, in which the wave crests (11) and the wave troughs (12) each have the same length (l), c) the partial bars (2, 3) are arranged parallel to each other and touching each other in the longitudinal direction so that a wave crest (11) of one partial bar (2 or 3) into a trough (12) of the other partial bar (3 or 2) comes to rest and that they form an overall cross-section with a circular envelope, whereby d) the radius of curvature of the side surfaces (4, 5 or 6, 7) of the partial rods (2, 3) corresponds to the radius of the envelope and e) the partial bars (2, 3) are fixed at least over partial areas of their length by a separation preventing the partial bars (2, 3) from one another. Stahlstab nach Anspruch 1, dadurch gekennzeichnet, daß die Wellenberge (11) der Teilstäbe (2, 3) Gewinderippen und die Wellentäler (12) Gewindekehlen bilden und daß die Umschließung aus einer mit einem entsprechenden Innengewinde (15) versehenen Mutter (14) besteht.Steel rod according to claim 1, characterized in that the wave crests (11) of the partial rods (2, 3) form threaded ribs and the wave troughs (12) form fillets and that the enclosure consists of a nut (14) provided with a corresponding internal thread (15). Stahlstab nach Anspruch 2, dadurch gekennzeichnet, daß das Innengewinde (15) der Mutter (14) so ausgebildet ist, daß bei gleicher Steigung (s) die Länge (l₁) der Wellenberge (16) kürzer und die Länge (l₂) der Wellentäler (17) länger ist als die jeweils gleiche Länge (l) der Wellenberge (11) und Wellentäler (12) der Teilstäbe (2 bzw. 3).Steel rod according to claim 2, characterized in that the internal thread (15) of the nut (14) is designed such that, with the same pitch (s), the length (l₁) of the wave crests (16) shorter and the length (l₂) of the wave troughs (17) is longer than the same length (l) of the wave crests (11) and wave troughs (12) of the partial bars (2 and 3).
EP93119168A 1992-12-05 1993-11-29 Multiple-part steel bars, in particular reinforcement bars, tension rods, anchorage bars or similar Expired - Lifetime EP0601426B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4240968A DE4240968C1 (en) 1992-12-05 1992-12-05 Multi-part steel rod, in particular concrete reinforcement rod, tension rod or the like
DE4240968 1992-12-05

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EP0601426A1 true EP0601426A1 (en) 1994-06-15
EP0601426B1 EP0601426B1 (en) 1996-05-22

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EP (1) EP0601426B1 (en)
AT (1) ATE138441T1 (en)
CZ (1) CZ263493A3 (en)
DE (2) DE4240968C1 (en)
HU (1) HUT68318A (en)
PL (1) PL301222A1 (en)
SK (1) SK136293A3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPQ624600A0 (en) * 2000-03-15 2000-04-06 Gray, Evelyn Frances Process for forming a threaded member

Citations (10)

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Publication number Priority date Publication date Assignee Title
GB881839A (en) * 1957-03-22 1961-11-08 Erich Lubbert Improvements in or relating to reinforcing rods for concrete
DE1231963B (en) * 1960-03-14 1967-01-05 Chester I Williams Clamp for connecting rods or the like, in particular for connecting rods for stiffening concrete parts
DE1659137A1 (en) * 1967-06-19 1970-12-17 Krupp Ag Huettenwerke Concrete rebar
FR2060222A7 (en) * 1969-09-16 1971-06-18 Talobre Joseph Antoine
FR2315589A1 (en) * 1975-06-23 1977-01-21 Kobe Steel Ltd STEEL BAR INTENDED FOR THE REINFORCEMENT OF CONCRETE AND NON-CIRCULAR CROSS-SECTION
DE2730023A1 (en) * 1977-07-02 1979-01-18 Dyckerhoff & Widmann Ag Concrete reinforcing rod assembly with overall round cross=section - with ribs in plane vertical to longitudinal axis, offset on opposite sides
DE2925917B1 (en) * 1979-06-27 1980-09-25 Krupp Ag Huettenwerke Concrete reinforcement bar, especially tie rod
US4362423A (en) * 1980-09-08 1982-12-07 Williams Form Engineering Corporation Coupling for coil-thread rebar
DE3722062A1 (en) * 1987-07-03 1989-01-12 Dyckerhoff & Widmann Ag Method for fastening a metallic sleeve on a stranded steel wire by extrusion
CH674321A5 (en) * 1987-10-12 1990-05-31 Moos Stahl Ag Method to produce split anchor bolts - makes anchor in two halves by rolling with grooves for bonding agent and rolled-on oblique ribs forming thread when halves put together

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
DE1813627C3 (en) * 1968-12-10 1976-09-16 Gerhard Dipl Ing Kuelessa HOT ROLLED CONCRETE REINFORCEMENT OR ANCHOR BAR
DE3517638A1 (en) * 1985-05-15 1986-11-20 Ulrich Dr.Ing. e.h. Dr.Ing. 8000 München Finsterwalder THREADED ROD

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB881839A (en) * 1957-03-22 1961-11-08 Erich Lubbert Improvements in or relating to reinforcing rods for concrete
DE1231963B (en) * 1960-03-14 1967-01-05 Chester I Williams Clamp for connecting rods or the like, in particular for connecting rods for stiffening concrete parts
DE1659137A1 (en) * 1967-06-19 1970-12-17 Krupp Ag Huettenwerke Concrete rebar
FR2060222A7 (en) * 1969-09-16 1971-06-18 Talobre Joseph Antoine
FR2315589A1 (en) * 1975-06-23 1977-01-21 Kobe Steel Ltd STEEL BAR INTENDED FOR THE REINFORCEMENT OF CONCRETE AND NON-CIRCULAR CROSS-SECTION
DE2730023A1 (en) * 1977-07-02 1979-01-18 Dyckerhoff & Widmann Ag Concrete reinforcing rod assembly with overall round cross=section - with ribs in plane vertical to longitudinal axis, offset on opposite sides
DE2925917B1 (en) * 1979-06-27 1980-09-25 Krupp Ag Huettenwerke Concrete reinforcement bar, especially tie rod
US4362423A (en) * 1980-09-08 1982-12-07 Williams Form Engineering Corporation Coupling for coil-thread rebar
DE3722062A1 (en) * 1987-07-03 1989-01-12 Dyckerhoff & Widmann Ag Method for fastening a metallic sleeve on a stranded steel wire by extrusion
CH674321A5 (en) * 1987-10-12 1990-05-31 Moos Stahl Ag Method to produce split anchor bolts - makes anchor in two halves by rolling with grooves for bonding agent and rolled-on oblique ribs forming thread when halves put together

Also Published As

Publication number Publication date
EP0601426B1 (en) 1996-05-22
SK136293A3 (en) 1994-06-08
CZ263493A3 (en) 1994-06-15
ATE138441T1 (en) 1996-06-15
PL301222A1 (en) 1994-06-13
HU9303455D0 (en) 1994-04-28
DE59302684D1 (en) 1996-06-27
DE4240968C1 (en) 1994-02-10
HUT68318A (en) 1995-06-28

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