EP0153337B2 - Anchoring of free traction steel element of a construction part subjected to dynamic strength - Google Patents

Anchoring of free traction steel element of a construction part subjected to dynamic strength Download PDF

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Publication number
EP0153337B2
EP0153337B2 EP84902907A EP84902907A EP0153337B2 EP 0153337 B2 EP0153337 B2 EP 0153337B2 EP 84902907 A EP84902907 A EP 84902907A EP 84902907 A EP84902907 A EP 84902907A EP 0153337 B2 EP0153337 B2 EP 0153337B2
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Prior art keywords
tension elements
ring
tension
anchor body
bore
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EP84902907A
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German (de)
French (fr)
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EP0153337A1 (en
EP0153337B1 (en
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Peter Matt
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Losinger Holding AG
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Losinger AG
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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
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports

Definitions

  • the invention is based on anchoring free-swinging steel tensile elements of a dynamically stressed component, which tensile elements are deflected twice in the anchoring area, with an anchor body with mutually parallel bores through which the tensile elements are guided and at their ends in conically outwardly opening spaces of the bores are anchored by means of clamping wedges, support means being provided in the deflection area of the anchor body to absorb deflection forces, against which the tension elements bear, and with an expansion ring for bundling the tension elements emerging from the anchor body bores and passing through the expansion ring (CH-A-4 30 135 ).
  • the most commonly used solution consists of filling the anchoring area in a force-fitting manner with rods, wires or strands of a suspension cable.
  • potting anchoring is discussed in DE-A-2614 821.
  • a casting compound made of fine zinc or zinc alloys is provided, which has properties that prevent fretting corrosion.
  • the function of such backfilling is to gradually remove the force of the rods, wires or strands so that they no longer reach the deflection point on the support plate, or weaken it in a harmless manner. This measure in no way increases the vibration resistance of the rods, the wires or the strands.
  • the anchorages described in the last two publications relate only to the deflecting forces generated in the area of an anchor body or a support plate and in no way solve problems caused by deflecting forces acting on the second deflecting point, where the individual tension elements are bundled into one link.
  • the object of the invention is an anchoring of free-swinging steel tension elements of a dynamically stressed component, which enables the tension elements passing through the holes in the anchor body to be exposed to no friction, so that the tensile force is completely transmitted to the clamps with which the tension elements are anchored in the holes in the anchor body are.
  • the object is achieved with an anchoring according to the preamble of claim 1 by the features of the characterizing part of claim 1.
  • the diameter of each hole is advantageously 2 to 5 mm larger than that of the tension elements.
  • the tension member shown made of steel of a dynamically stressed component which tension member z. B. is a free-hanging suspension cable of a cable-stayed bridge, is fanned out on its end to be anchored in individual tension elements 4 (rods, wires or strands).
  • the part of the tension member to be anchored is arranged in a tubular guide sleeve 8.
  • the guide sleeve 8 can be made of plastic or sheet steel and is intended for concreting.
  • the end parts of the tension elements 4 are carried out through mutually parallel bores 2 of an anchor body 1. With the anchor body 1, a clamping ring 7 is screwed, which in turn is welded to the guide sleeve 8.
  • the anchor body 1 is usually made of steel.
  • the bores 2 have conically opening spaces 2a, in which clamping wedges 3 are inserted, by means of which the end parts of the tension elements 4 are anchored to the anchor body 1.
  • the diameter D of each bore 2 in its section 2c, which extends from the conically opening space 2a to approximately the outlet end 2b, is constant and larger than that d of the tension element 4.
  • the diameter D of each bore 2 is 2 to 5 mm larger than that of the tension elements 4.
  • oscillatable support means made of a material that is softer than the material of the anchor body 1 or the tension elements 4 lying against the support means 4 are provided.
  • the support means are only provided in the area of the outlet ends 2b.
  • the support means Consist of an elastically flexible ring 5, 13, 14, which is accommodated in a circular recess 11 in the wall of the outlet end 2b of each bore 2 and which oscillates with the tension element 4.
  • the rings 5, 13, 14 are advantageously glued to the wall of the circular recess 11.
  • the resilient ring 5, 13, 14 can have the shape of a polygon, a trapezoid or a circle.
  • the support means can consist of a perforated, resiliently flexible disk 6, which is held on the anchor body 1 by means of the clamping ring 7 on the outlet side of the bores 2, lying against the end face of the anchor body.
  • the holes 12 of the disk 6 are aligned with the bores 2 of the anchor body 1, so that the tension elements 4 emerging from the anchor body bores 2 pass through the holes 12.
  • the rings 5, 6, 13, 14, which are polygonal, trapezoidal or circular in cross-section the perforated edges of the disk 6 lie tightly against the tension elements 4.
  • the disc 6 vibrates with the tension elements 4 passing through its holes 12.
  • the expansion ring has an insert 10 lying on the tension elements 4 on its surface facing the tension elements 4. The material of the insert 10 is softer than that of the expansion ring 9 or the tension elements 4.
  • the free space between the tension elements and the bore walls in the anchor body means that the tension elements are not subjected to any friction, the tensile force being transmitted 100% directly to the terminals.
  • the measures described above significantly increase the vibration resistance and thus the service life of the tension elements both in the first deflection point on the anchor body and in the second deflection point on the expansion ring.

Abstract

PCT No. PCT/CH84/00128 Sec. 371 Date Apr. 15, 1985 Sec. 102(e) Date Apr. 15, 1985 PCT Filed Aug. 15, 1984 PCT Pub. No. WO85/01080 PCT Pub. Date Mar. 14, 1985.The tension elements (4) of a tension member of steel are anchored at their ends in an anchor body (1), through whose bores (2) running parallel to one another are led, by means of wedge clamps (3). The diameter (D) of each bore (2) in its section (2c) is constant and larger than that (d) of the tension element (4). For the purpose of taking-up of deflecting forces, an elastically yielding ring (5) is provided for in the deflection region of the anchor body (1), which ring is accommodated in a circular recess (11) in the wall of the exit end (2b) of each bore (2). In the deflection region of the spreader ring (9), where the tension elements (4) run together into a bunch, an insert (10) is provided for, the material of which is softer than that of the spreader ring (9) or of the tension elements (4). Likewise the material of the ring (5) is softer than the material of the anchor body (1) or of the tension elements (4). In this anchoring, the deflecting forces acting upon the tension elements (4) are eliminated both on the first and on the second deflection location.

Description

Die Erfindung geht aus von einer Verankerung von freischwingenden Zugelementen aus Stahl eines dynamisch beanspruchten Bauteiles, welche Zugelemente im Verankerungsbereich zweimal abgelenkt sind, mit einem Ankerkörper mit zueinander parallel verlaufenden Bohrungen, durch welche die Zugelemente durchgeführt und an ihren Enden in sich konisch nach aussen öffnenden Räumen der Bohrungen mittels Klemmkeile verankert sind, wobei zwecks Aufnahme von Ablenkkräften im Ablenkbereich des Ankerkörpers Stützmittel vorgesehen sind, an welchen die Zugelemente anliegen, und mit einem Spreizring zum Bündeln der aus den Ankerkörperbohrungen austretenden und den Spreizring durchlaufenden Zugelemente (CH-A-4 30 135).The invention is based on anchoring free-swinging steel tensile elements of a dynamically stressed component, which tensile elements are deflected twice in the anchoring area, with an anchor body with mutually parallel bores through which the tensile elements are guided and at their ends in conically outwardly opening spaces of the bores are anchored by means of clamping wedges, support means being provided in the deflection area of the anchor body to absorb deflection forces, against which the tension elements bear, and with an expansion ring for bundling the tension elements emerging from the anchor body bores and passing through the expansion ring (CH-A-4 30 135 ).

Die Verankerung eines gespannten Zuggliedes für grosse Belastungen in einem Betonbauteil ist in der DE-A-27 53 112 beschrieben. Der innerhalb des Betonbauteiles liegende Teil des Zuggliedes hat keinen Verbund mit dem Betonbauteil, weil er von einem Umhüllungsrohr umgeben ist. Dieser Teil des Zuggliedes kann deshalb nach dem Entlasten und Lösen seiner Verankerung aus dem Betonbauteil entfernt werden. Dadurch wird eine spätere Auswechselbarkeit des Zuggliedes, das z. B. ein Schrägseil einer Schrägseilbrücke ist, ermöglicht, wenn das Schrägseil schadhaft geworden ist. Durch diese Lösung wird aber nicht der Bruchschaden durch auf die Schrägseile wirkende Ablenkkräfte beseitigt und die Schwingungsfestigkeit der Schrägseile nicht erhöht.The anchoring of a tensioned tension member for large loads in a concrete component is described in DE-A-27 53 112. The part of the tension member lying within the concrete component has no bond with the concrete component because it is surrounded by a sheathing tube. This part of the tension member can therefore be removed from the concrete component after relieving and releasing its anchoring. As a result, a later interchangeability of the tension member, the z. B. a cable-stayed of a cable-stayed bridge is made possible if the cable-stayed has become defective. However, this solution does not eliminate the breakage damage caused by deflecting forces acting on the stay cables and does not increase the vibration resistance of the stay cables.

Diese Nachteile versucht die Lehre nach der CH - A-541 693 zu beseitigen. Zwecks Aufnahme der Ablenkkräfte der hinter dem Ankerkörper zu einem Bündel zusammenlaufenden Drähte werden in Ablenkbereich des Ankerkörpers Stützmittel eingeführt, gegen welche die Drähte anliegen. Ausserdem zentrieren diese Stützmittel die Drähte gegenüber dem Ankerkörper in einer vorbestimmten Lage. Zu diesem Zweck sind die Stützmittel in den Räumen zwischen den Drähten und der jeweiligen Bohrungswand eingefügt und füllen diese Räume aus. Die Stüzmittel bestehen aus einem Material, das weicher ist als das Material der Drähte und/oder des Ankerkörpers. Durch diese Massnahme wird zwar die Reibung an den Ablenkstellen der Drähte herabgesezt, um einen Reibungsund Korrosionsbruch weitgehend zu vermeiden. Die Reibung und der Bruch werden aber nicht vollständig eliminiert, gerade aus dem Grunde, dass die Räume zwischen den Drähten und der jeweiligen Bohrungswand vollständig mit den Stützmitteln ausgefüllt sind und die Drähte dicht an den Bohrungswänden über die gesamte Länge der Bohrungen anliegen, so dass sie nicht unbehindert schwingen können.The teaching according to CH - A-541 693 tries to overcome these disadvantages. In order to absorb the deflection forces of the wires converging behind the armature body into a bundle, support means are introduced into the deflection area of the armature body, against which the wires rest. In addition, these support means center the wires in a predetermined position with respect to the anchor body. For this purpose, the support means are inserted in the spaces between the wires and the respective bore wall and fill these spaces. The support means consist of a material that is softer than the material of the wires and / or the anchor body. With this measure, the friction at the deflection points of the wires is reduced in order to largely avoid friction and corrosion breakage. However, the friction and breakage are not completely eliminated, precisely because the spaces between the wires and the respective hole wall are completely filled with the support means and the wires lie tightly against the hole walls over the entire length of the holes, so that they cannot swing freely.

Die meistgebrauchte Lösung besteht in einer mit Stäben, Drähten oder Litzen eines Aufhängekabels kraftschlüssig verbundenen Verfüllung des Verankerungsbereiches. Eine solche Vergussverankerung ist in der DE-A-2614 821 erörtert. Im Bereich derAblenkstelle an dem der Abstützplatte zugewandten Ende der Ankerhülle ist eine Vergussmasse aus Feinzink oder Zinklegierungen vorgesehen, die reibkorrosionsverhindernde Eigenschaften aufweist. Die Funktion einer solchen Verfüllung besteht darin, die Kraft der Stäbe, Drähte oder Litzen allmählich abzutragen, so dass sie die Ablenkstelle bei der Abstützplatte nicht mehr, oder auf ungefährliche Weise abgeschwächt, erreicht. Durch diese Massnahme wird keineswegs die Schwingungsfestigkeit der Stäbe, der Drähte bzw. der Litzen erhöht.The most commonly used solution consists of filling the anchoring area in a force-fitting manner with rods, wires or strands of a suspension cable. Such potting anchoring is discussed in DE-A-2614 821. In the area of the deflection point on the end of the anchor sleeve facing the support plate, a casting compound made of fine zinc or zinc alloys is provided, which has properties that prevent fretting corrosion. The function of such backfilling is to gradually remove the force of the rods, wires or strands so that they no longer reach the deflection point on the support plate, or weaken it in a harmless manner. This measure in no way increases the vibration resistance of the rods, the wires or the strands.

Die in den zwei letztgenannten Veröffentlichungen beschriebenen Verankerungen beziehen sich nur auf die im Bereich eines Ankerkörpers bzw. einer Abstützplatte entstehenden Ablenkkräfte und keineswegs Probleme lösen, die durch auf der zweiten Ablenkstelle wirkende Ablenkkräfte, wo die einzelnen Zugelemente zu einem Glied gebündelt werden, verursacht sind.The anchorages described in the last two publications relate only to the deflecting forces generated in the area of an anchor body or a support plate and in no way solve problems caused by deflecting forces acting on the second deflecting point, where the individual tension elements are bundled into one link.

Aus der DE-C-27 04 818 ist eine Verankerung eines Bündelspanngliedes für Spannbeton bekannt. Um die Länge der trompetenartigen Erweiterung der Umhüllung möglichst kurz zu halten und dennoch eine Beschädigung der Einzelelemente zu vermeiden wird ein längs dem Spannglied beweglicher Abstandhalter aus Kunststoff verwendet, der eine Anzahl von durch rohrförmige Hülsen gebildete radial zueinander angeordnete Ausnehmungen zur Aufnahme der Einzelelemente des Spanngliedes aufweist. An der Uebergangsstelle zwischen der trompetenartigen Erweiterung und dem eigentlichen Hüllrohr sind Umwicklungen vorhanden, die die infolge der Umlenkung entstehenden, radial nach aussen gerichteten Umlenkkräfte aufnehmen. Nach dem Spannen des Spanngliedes wird in den Hohlraum der Uebergangshülse Zementleim injiziert. Nach dem Aushärten des Zemendeimes sind die Einzelelemente des Spanngliedes und der Abstandhalter selbst nach allfälligen Rissbildungen im Verpressmörtel nicht völlig frei beweglich.DE-C-27 04 818 anchoring a bundle tendon for prestressed concrete is known. In order to keep the length of the trumpet-like expansion of the casing as short as possible and still avoid damaging the individual elements, a spacer made of plastic that is movable along the tendon is used, which has a number of radially arranged recesses formed by tubular sleeves for receiving the individual elements of the tendon . At the transition point between the trumpet-like extension and the actual cladding tube there are wraps which absorb the radially outward deflection forces which arise as a result of the deflection. After the tendon has been tensioned, cement paste is injected into the cavity of the transition sleeve. After the cement paste has hardened, the individual elements of the tendon and the spacer are not completely free to move, even after any cracks have formed in the grout.

Aus den "Mitteilungen des Institutes für Bautechnik", Ausgabe 6/1981, ist es im Zusammenhang mit Spanngliedem eines Schlaufenverankers bekannt, am Ende des Hüllrohres einen Stahlring zur Aufnahme der radial nach aussen gerichteten Umlenkkräfte vorzusehen. Zwischen den äusseren Einzelelementen des Spanngliedes und dem Stahlring ist zum Schutz des Spanngliedes vor Reibungsschäden ein Kunststoffrohr eingesetzt. Im Bereich des Stahlringes zwischen den Einzelelementen des Spanngliedes befindet sich eine Dichtungsmasse, die einerseits die Einzelelemente voneinander auf Abstand hält und andererseits verhindert, dass Verpressmörtel in das Hüllrohr gelangen kann.From the "Announcements of the Institute for Building Technology", edition 6/1981, it is known in connection with the tendons of a loop anchor to provide a steel ring at the end of the cladding tube to absorb the radially outward deflecting forces. A plastic tube is inserted between the outer individual elements of the tendon and the steel ring to protect the tendon from friction damage. In the area of the steel ring between the individual elements of the tendon there is a sealing compound which, on the one hand, keeps the individual elements at a distance from one another and, on the other hand, prevents grout from getting into the cladding tube.

Es ist Aufgabe der Erfindung, eine Verankerung von freischwingenden Zugelementen aus Stahl eines dynamisch beanspruchten Bauteiles zu schaffen, die es ermöglicht, dass die die Bohrungen des Ankerkörpers durchsetzenden Zugelemente keiner Reibung ausgesetzt werden, so dass die Zugkraft vollständig auf die Klemmen übertragen wird, mit denen die Zugelemente in den Bohrungen des Ankerkörpers verankert sind.The object of the invention is an anchoring of free-swinging steel tension elements of a dynamically stressed component, which enables the tension elements passing through the holes in the anchor body to be exposed to no friction, so that the tensile force is completely transmitted to the clamps with which the tension elements are anchored in the holes in the anchor body are.

Die Aufgabe wird bei einer Verankerung nach dem Oberbegriff des Patentanspruches 1 durch die Merkmale des kennzeichnenden Teiles des Patentanspruches 1 gelöst.The object is achieved with an anchoring according to the preamble of claim 1 by the features of the characterizing part of claim 1.

Mit Vorteil ist der Durchmesser jeder Bohrung um 2 bis 5 mm grösser als derjenige der Zugelemente.The diameter of each hole is advantageously 2 to 5 mm larger than that of the tension elements.

Der Erfindungsgegenstand derAnsprüche 1 bis 5 wird nachstehend anhand der Zeichnung beispielsweise näher erläutert. Es zeigen

  • Fig. 1 eine Ansicht teilweise im Längsschnitt einer Verankerung mit zweimal abgelenkten Zugelementen,
  • Fig. 2 einen Teillängsschnitt einer anderen Ausführungsform der Verankerung im grösseren Massstab, in welchem nur der Ankerkörper mit einem Zugelement dargestellt ist,
  • Fig. 3 eine Seitenansicht einer durchlöcherten, elastisch nachgiebigen Scheibe nach der Fig. 1,
  • Fig. 4 einen Teillängsschnitt einer noch weiteren Ausführungsform, in welchem der Ankerkörper teilweise nur mit einer Bohrung und einem durch sie durchgeführten Zugelement dargerstellt ist, und
  • Fig. 5 einen Teillängsschnitt einer noch weiteren Ausführungsform, in welchem der Ankerkörper teilweise nur mit einer Bohrung und einem durch die Bohrung durchgeführten Zugelement dargestellt ist.
The subject matter of claims 1 to 5 is explained in more detail below with reference to the drawing, for example. Show it
  • 1 is a view partially in longitudinal section of an anchorage with twice deflected tension elements,
  • 2 shows a partial longitudinal section of another embodiment of the anchoring on a larger scale, in which only the anchor body is shown with a tension element,
  • 3 is a side view of a perforated, resilient disc according to FIG. 1,
  • Fig. 4 is a partial longitudinal section of yet another embodiment, in which the anchor body is partially shown only with a bore and a traction element performed by it, and
  • Fig. 5 is a partial longitudinal section of yet another embodiment, in which the anchor body is partially shown only with a bore and a pulling element carried through the bore.

Das dargestellte Zugglied aus Stahl eines dynamisch beanspruchten Bauteiles, welches Zugglied z. B. ein freischwingendes Aufhängekabel einer Schrägseilbrücke ist, ist auf seinem zu verankemden Ende in einzelne Zugelemente 4 (Stäbe, Drähte oder Litzen) aufgefächert. Der zu verankernde Teil des Zuggliedes ist in einer rohrförmigen Führungshülle 8 angeordnet. Die Führungshülle 8 kann aus Kunststoff oder Stahlblech bestehen und ist zum Einbetonieren bestimmt. Die Endteile der Zugelemente 4 sind durch zueinander parallel verlaufende Bohrungen 2 eines Ankerkörpers 1 durchgeführt. Mit dem Ankerkörper 1 ist ein Klemmring 7 verschraubt, der seinerseits mit der Führungshülle 8 verschweisst ist. Der Ankerkörper 1 besteht üblicherweise aus Stahl.The tension member shown made of steel of a dynamically stressed component, which tension member z. B. is a free-hanging suspension cable of a cable-stayed bridge, is fanned out on its end to be anchored in individual tension elements 4 (rods, wires or strands). The part of the tension member to be anchored is arranged in a tubular guide sleeve 8. The guide sleeve 8 can be made of plastic or sheet steel and is intended for concreting. The end parts of the tension elements 4 are carried out through mutually parallel bores 2 of an anchor body 1. With the anchor body 1, a clamping ring 7 is screwed, which in turn is welded to the guide sleeve 8. The anchor body 1 is usually made of steel.

Die Bohrungen 2 weisen einerseits sich konisch nach aussen öffnende Räume 2a auf, in welcher Klemmkeile 3 eingesetzt sind, mittels welcher die Endteile der Zugelemente 4 am Ankerkörper 1 verankertsind. Der Durchmesser D jeder Bohrung 2 in ihrem Abschnitt 2c, der sich von dem sich konisch nach aussen öffnenden Raum 2a bis annähernd zum Austrittsende 2b erstreckt, ist gleichbleibend und grösser als derjenige d des Zugelementes 4. Der Durchmesser D jeder Bohrung 2 ist um 2 bis 5 mm grösser als derjenige d der Zugelemente 4.On the one hand, the bores 2 have conically opening spaces 2a, in which clamping wedges 3 are inserted, by means of which the end parts of the tension elements 4 are anchored to the anchor body 1. The diameter D of each bore 2 in its section 2c, which extends from the conically opening space 2a to approximately the outlet end 2b, is constant and larger than that d of the tension element 4. The diameter D of each bore 2 is 2 to 5 mm larger than that of the tension elements 4.

Zwecks Aufnahme von Ablenkkräften im Ablenkbereich des Ankerkörpers 1 sind schwingbare Stützmittel aus einem Material vorgesehen, das weicher ist als das Material des Ankerkörpers 1 oder der gegen die Stützmittel anliegenden Zugelemente 4. Die Stützmittel sind nur im Bereich der Austrittsenden 2b vorgesehen. Das Stützmittel kann, wie aus den Fig. ersichtlich ist, aus jeweils einem in einer Kreisaussparung 11 in der Wandung des Austrittsendes 2b jeder Bohrung 2 untergebrachten, elastisch nachgiebigen Ring 5, 13, 14 bestehen, der mit dem Zugelement 4 mitschwingt. Mit Vorteil sind die Ringe 5, 13, 14 an der Wandung der Kreisausnehmung 11 verleimt. Im Querschnitt kann der elastisch nachgiebige Ring 5, 13, 14 die Form eines Mehreckes, eines Trapezes oder eines Kreises haben.In order to absorb deflection forces in the deflection area of the anchor body 1, oscillatable support means made of a material that is softer than the material of the anchor body 1 or the tension elements 4 lying against the support means 4 are provided. The support means are only provided in the area of the outlet ends 2b. The support means, as can be seen from the FIG., Consist of an elastically flexible ring 5, 13, 14, which is accommodated in a circular recess 11 in the wall of the outlet end 2b of each bore 2 and which oscillates with the tension element 4. The rings 5, 13, 14 are advantageously glued to the wall of the circular recess 11. In cross section, the resilient ring 5, 13, 14 can have the shape of a polygon, a trapezoid or a circle.

Anstelle der Ringe 5, 13, 14 kann das Stützmittel aus einer durchlöcherten, elastisch nachgiebigen Scheibe 6 bestehen, die an der Austrittsseite der Bohrungen 2, an der Ankerkörperstirnseite anliegend, an dem Ankerkörper 1 mittels des Klemmringes 7 festgehalten ist. Die Löcher 12 der Scheibe 6 sind mit den Bohrungen 2 des Ankerkörpers 1 ausgerichtet, so dass die aus den Ankerkörperbohrungen 2 auftretenden Zugelemente 4 die Löcher 12 durchlaufen. Auch in diesem Fall, wie bei den Ringen 5, 6, 13, 14, die im Querschnitt mehreck-, trapez- oder kreisförmig sind, liegen die Lochränder der Scheibe 6 dicht an den Zugelementen 4 an. Somit schwingt die Scheibe 6 mit den ihre Löcher 12 durchlaufenden Zugelementen 4 mit.Instead of the rings 5, 13, 14, the support means can consist of a perforated, resiliently flexible disk 6, which is held on the anchor body 1 by means of the clamping ring 7 on the outlet side of the bores 2, lying against the end face of the anchor body. The holes 12 of the disk 6 are aligned with the bores 2 of the anchor body 1, so that the tension elements 4 emerging from the anchor body bores 2 pass through the holes 12. In this case too, as with the rings 5, 6, 13, 14, which are polygonal, trapezoidal or circular in cross-section, the perforated edges of the disk 6 lie tightly against the tension elements 4. Thus, the disc 6 vibrates with the tension elements 4 passing through its holes 12.

Die aufgefächerten, verankerten Zugelemente 4, die aus den Ankerkörperbohrungen 2 austreten, laufen durch einen in der Führungshülle 8 angeordneten Spreizring 9, mittels welchen die Zugelemente 4 zu einem gebündelten, nicht dargestellten Zugglied zusammengefügt werden. Dies ist die zweite Ablenkstelle, in welcher auf die Zugelemente Ablenkkräfte wirken. Zwecks Aufnahme der Ablenkkräfte auf dieser zweiten Ablenkstelle weist der Spreizring auf seiner den Zugelementen 4 zugewandten Fläche eine an den Zugelementen 4 anliegende Einlage 10 auf. Das Material der Einlage 10 ist weicher als dasjenige des Spreizringes 9 oder der Zugelemente 4.The fanned out, anchored tension elements 4, which emerge from the anchor body bores 2, run through an expansion ring 9 arranged in the guide sleeve 8, by means of which the tension elements 4 are joined to form a bundled tension element, not shown. This is the second deflection point, in which deflection forces act on the tension elements. For the purpose of absorbing the deflection forces on this second deflection point, the expansion ring has an insert 10 lying on the tension elements 4 on its surface facing the tension elements 4. The material of the insert 10 is softer than that of the expansion ring 9 or the tension elements 4.

Es ist bekannt, dass z. B. bei einer Oberspannung von 50% der Nennzugfestigkeit der hochwertigen Stahldrähte oder Litzen eines Aufhängekabels Schwingbreiten erzielt werden, die grösser oder gleich 200 N/mm2 sind. Dies führt dazu, dass sich die Drähte bzw. Litzen oder Stäbe in den Ankerkörperbohrungen, durch welche sie durchgeführt sind, gegen die Bohrlochwandungen, in Richtung der Drahtbündelachse anpressen und beim Austritt aus dem Ankerkörper einen Knick bilden. Dasselbe betrifft die zweite Ablenkstelle im Bereich des Spreizringes. Solche Knicke führen dann zu einer ganz erheblichen Abminderung der Schwingfestigkeit und endlich zum Bruch der Drähte bzw. der Litzen oder der Stäbe an den Ablenkstellen. Durch den freien Raum zwischen den Zugelementen und den Bohrungswandungen im Ankerkörper wird demgegenüber erreicht, dass die Zugelemente keiner Reibung unterworfen sind, wobei die Zugkraft 100%ig direkt auf die Klemmen übertragen wird. Durch die oben beschriebenen Massnahmen wird die Schwingungsfestigkeit und somit die Lebensdauer der Zugelemente sowohl in der ersten Ablenkstelle am Ankerkörper als auch in der zweiten Ablenkstelle am Spreizring wesentlich erhöht.It is known that e.g. B. With an upper tension of 50% of the nominal tensile strength of the high-quality steel wires or strands of a suspension cable, vibration widths that are greater than or equal to 200 N / mm 2 can be achieved. The result of this is that the wires or strands or rods in the anchor body bores through which they are led press against the borehole walls in the direction of the wire bundle axis and form a kink when they emerge from the anchor body. The same thing affects the second deflection point in the area of the expansion ring. Such kinks then lead to a very considerable reduction in the fatigue strength and finally to the breakage of the wires or the strands or the rods at the deflection points. By contrast, the free space between the tension elements and the bore walls in the anchor body means that the tension elements are not subjected to any friction, the tensile force being transmitted 100% directly to the terminals. The measures described above significantly increase the vibration resistance and thus the service life of the tension elements both in the first deflection point on the anchor body and in the second deflection point on the expansion ring.

Claims (3)

1. Anchorage of freely oscillating steel tension elements (4) of a dynamically stressed structural component, which tension elements (4) are deflected twice in the anchorage region, with an anchor body (1) with bores (2) running parallel to one another, through which the tension elements (4) are led and are anchored at their ends by means of wedge clamps (3) in spaces (2a) of the bores. (2) opening conically outwards, supporting means, against which the tension elements (4) rest, being provided in the deflection region of the anchor body (1) for the purpose of taking up deflecting forces, with a spreader ring (9) for bunching the tension elements (4) leaving the anchor body bores (2) and passing through the spreader ring (9) and with at least one supporting means disposed in the region of the exit ends (2b), the diameter (D) of each bore (2) in the section (2c) from the space (2a) opening conically outwards up to approximately the exit end (2b) is constant and larger than that (d) of the tension element (4), characterized in that one supporting means is provided for each of the tension elements (4), in that the supporting means each comprise a resiliently yielding ring (5, 13, 14) accommodated in a circular recess (11) in the wall of the exit end (2b) of each bore (2), which ring oscillates with the tension element (4), and in that the spreader ring (9) has on its surface facing the tension elements (4) an insert (10) resting against the tension elements (4), which insert is made of a softer material than that of the spreader ring (9) or of the tension elements (4).
2. Anchorage according to claim 1, characterized in that the diameter (D) of each bore (2) is larger by 2 to 5 mm than that (d) of the tension elements (4).
3. Anchorage according to claim 1 or 2, characterized in that each resiliently yielding ring (5, 6, 13, 14) is polygonal, trapezoidal, or circular in cross-section.
EP84902907A 1983-08-22 1984-08-15 Anchoring of free traction steel element of a construction part subjected to dynamic strength Expired - Lifetime EP0153337B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84902907T ATE24222T1 (en) 1983-08-22 1984-08-15 ANCHORING OF FREE-SPANING STEEL TENSION ELEMENTS OF A DYNAMICALLY STRESSED COMPONENT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4567/83A CH662595A5 (en) 1983-08-22 1983-08-22 ANCHORING OF FREELY SWINGING STEEL ELEMENTS OF A DYNAMICALLY STRESSED COMPONENT.
CH4567/83 1983-08-22

Publications (3)

Publication Number Publication Date
EP0153337A1 EP0153337A1 (en) 1985-09-04
EP0153337B1 EP0153337B1 (en) 1986-12-10
EP0153337B2 true EP0153337B2 (en) 1991-09-25

Family

ID=4278496

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Application Number Title Priority Date Filing Date
EP84902907A Expired - Lifetime EP0153337B2 (en) 1983-08-22 1984-08-15 Anchoring of free traction steel element of a construction part subjected to dynamic strength

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US (1) US4592181A (en)
EP (1) EP0153337B2 (en)
JP (1) JPS60156849A (en)
AT (1) ATE24222T1 (en)
AU (1) AU577305B2 (en)
BR (1) BR8407028A (en)
CA (1) CA1226749A (en)
CH (1) CH662595A5 (en)
DE (1) DE3461668D1 (en)
DK (1) DK152066C (en)
ES (1) ES293240Y (en)
IN (1) IN161218B (en)
IT (1) IT1179065B (en)
MX (1) MX168404B (en)
MY (1) MY100102A (en)
PT (1) PT79111B (en)
WO (1) WO1985001080A1 (en)
ZA (1) ZA846389B (en)

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FR2592666B1 (en) * 1986-01-07 1988-03-11 Sogelerg SUPPORT SYSTEM BY FLEXIBLE CABLE WITH LOCAL BUILT-IN, ESPECIALLY FOR BRIDGE BRIDGES
FR2613815B1 (en) * 1987-04-10 1989-06-23 Bouygues Offshore TENSILE STEEL TUBE, PARTICULARLY FOR PRODUCING ANCHORING LINES FOR TENSION LINE TYPE PRODUCTION PLATFORMS, PROCESS FOR HANDLING AND SETTING UP SUCH A TUBE, AND PLATFORM COMPRISING SUCH A TUBE
FR2623551B1 (en) * 1987-11-25 1992-04-24 Freyssinet Int Stup IMPROVEMENTS ON SURFACES AND THEIR COMPONENTS
CH683850A5 (en) * 1991-07-10 1994-05-31 Keller Paul Ingb Ag Anchoring element.
JP2693700B2 (en) * 1993-06-16 1997-12-24 鹿島建設株式会社 Method for fixing carbon fiber reinforced plastic strands
JP3035901B2 (en) * 1994-08-29 2000-04-24 住友電気工業株式会社 Fixing member and fixing section of PC steel strand
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DE19801786A1 (en) * 1998-01-19 1999-07-29 Suspa Spannbeton Gmbh Anchor system for tensioners and anchors in prestressed concrete construction
FR2794484B1 (en) * 1999-06-03 2001-08-03 Freyssinet Int Stup DEVICE FOR ANCHORING A STRUCTURAL CABLE
CN102154861B (en) * 2011-04-11 2012-10-10 江苏法尔胜新日制铁缆索有限公司 Ultrahigh fatigue stress amplitude resistant steel cable
GB2514621B (en) * 2013-05-31 2020-04-15 Vsl Int Ag Cable anchorage
DE102013215136A1 (en) * 2013-08-01 2015-02-05 Dywidag-Systems International Gmbh Corrosion-protected tension member and plastically deformable disc made of anti-corrosion material for such a tension member
CN103388379B (en) * 2013-08-06 2016-02-10 天津鑫坤泰预应力专业技术有限公司 A kind of finished steel strand bundle
WO2016063960A1 (en) * 2014-10-22 2016-04-28 新日鉄住金エンジニアリング株式会社 Cable, and cable production method

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Also Published As

Publication number Publication date
IN161218B (en) 1987-10-17
MX168404B (en) 1993-05-24
ES293240U (en) 1988-01-16
CH662595A5 (en) 1987-10-15
ATE24222T1 (en) 1986-12-15
PT79111A (en) 1984-09-01
WO1985001080A1 (en) 1985-03-14
DK152066C (en) 1988-06-06
IT1179065B (en) 1987-09-16
ES293240Y (en) 1988-09-16
CA1226749A (en) 1987-09-15
DK174685A (en) 1985-04-18
US4592181A (en) 1986-06-03
DK152066B (en) 1988-01-25
MY100102A (en) 1989-10-10
EP0153337A1 (en) 1985-09-04
IT8467836A1 (en) 1986-02-21
IT8467836A0 (en) 1984-08-21
EP0153337B1 (en) 1986-12-10
JPH0336088B2 (en) 1991-05-30
BR8407028A (en) 1985-07-30
PT79111B (en) 1986-06-03
ZA846389B (en) 1985-03-27
AU3216184A (en) 1985-03-29
DK174685D0 (en) 1985-04-18
AU577305B2 (en) 1988-09-22
JPS60156849A (en) 1985-08-17
DE3461668D1 (en) 1987-01-22

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