EP0077952B1 - Procédé d'assemblage par adhérence d'aciers à béton dans la construction en béton armé - Google Patents

Procédé d'assemblage par adhérence d'aciers à béton dans la construction en béton armé Download PDF

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Publication number
EP0077952B1
EP0077952B1 EP19820109318 EP82109318A EP0077952B1 EP 0077952 B1 EP0077952 B1 EP 0077952B1 EP 19820109318 EP19820109318 EP 19820109318 EP 82109318 A EP82109318 A EP 82109318A EP 0077952 B1 EP0077952 B1 EP 0077952B1
Authority
EP
European Patent Office
Prior art keywords
thread
washout
sleeve
region
taper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19820109318
Other languages
German (de)
English (en)
Other versions
EP0077952A1 (fr
Inventor
Rolf Dipl.-Ing. Knodel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wayss and Freytag AG
Original Assignee
Wayss and Freytag AG
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 Wayss and Freytag AG filed Critical Wayss and Freytag AG
Publication of EP0077952A1 publication Critical patent/EP0077952A1/fr
Application granted granted Critical
Publication of EP0077952B1 publication Critical patent/EP0077952B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—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
    • E04C5/165—Coaxial connection by means of sleeves

Definitions

  • the invention relates to a method for the positive connection of ;; reinforcing bars in reinforced concrete construction by means of a screw sleeve, the bar ends to be connected being peeled and provided with a rolled-up thread, which in the outlet area has a conical thread core which increases in diameter towards the thread end, onto which the sleeve is forcibly screwed onto the rod in such a way that a plastic deformation occurs in the tapering thread area.
  • the rod connection has approximately the same load-bearing capacity as the unimpeded rod. While the steel flows outside the socketed area under load until it breaks, it elongates and contracts to the same extent so that the rod cross-section becomes smaller and smaller, in the threaded area there is a bond between the rod and the socket, which prevents the rod from flowing under the socket . In the thread area there is therefore no reduction in the cross-section of the rod as long as the connection between the sleeve and the rod remains intact. If the bond fails in the first thread of the sleeve, the flow process continues into the thread area, further threads become disengaged due to the transverse contraction of the rod and the connection breaks like a zipper.
  • the rods are peeled at their ends with a constant diameter before the thread is rolled up.
  • the thread tips are therefore not fully formed during the rolling process.
  • the invention makes it its task to design the thread runout of the rod end thread in such a way that even the critical first threads come fully into engagement with the sleeve immediately at the beginning of the rolled thread, so that steel with unfavorable flow behavior can also be connected without reducing the load-bearing capacity.
  • the object is achieved by the method described in claim 1. Due to the conical peeling in the thread runout, more material remains in this area, so that the thread tips are fully formed during the subsequent rolling process.
  • the conically widened diameter of the rolled thread in the rod end area brings an additional improvement in the load-bearing capacity if, in the subsequent work step, the sleeve is unscrewed and deformed in the threads of the outlet area.
  • a roller tool for producing the rod end thread according to the invention is proposed.
  • the degree of taper of the outside diameter of the rod end thread is limited by the elasticity of the sleeve. As a rule, the sleeve will have a constant thread.
  • the load-bearing capacity of the socket connection can be further improved if the taper of the thread ends is further enlarged and the socket thread is also conical at the ends.
  • the gain in load-bearing capacity must, however, be bought with a more complex production of the socket thread in this solution.
  • the sleeve thread may only have a conicity that is all the less less than the sleeve's elasticity allows without tearing.
  • the invention opens up many possible variations in adapting the screwed socket connection to the properties of the available steel grades from an economic point of view.
  • the invention is illustrated by 5 figures and one way of carrying it out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)

Claims (2)

1. Procédé de jonction à effet de force de fers à béton dans la construction en béton armé au moyen d'un manchon filete, en vue de quoi les extrémités des barres à assembler sont prévues écroûtées et pourvues d'un filetage roulé qui présente dans la région de fin du filetage un noyau à fond de filet en tronc de cône à diamètre croissant en direction de l'extrémité du filetage, de sorte que le manchon est vissé à force sur la barre et qu'il se produit une déformation plastique dans la région de la fin du filetage, caractérisé en ce que, dans la région de la fin du filetage, pendant l'opération d'écroûtage nécessaire avant la formation du filetage par roulage, le diamètre de la partie écroûtée va en croissant en tronc de cône, et le filetage obtenu par roulage a un diamètre extérieur qui va en croissant en tronc de cône vers la fin du filetage, la conicité de ce filetage de l'extrémité de la barre étant limitée à une mesure telle qu'un manchon à diamètre intérieur du filetage constant ou à filetage à conicité dans la région de la fin du filetage inférieure à celle de la barre, ne se fend pas quand il est vissé sur la barre.
2. Outil à rouler les filetages destiné à la mise en oeuvre du procédé selon la revendication 1, caractérisé en ce que le diamètre extérieur (14) du rouleau va en se rétrécissant en tronc de cône dans la région de la fin du filetage (15), de sorte que l'on peut avec cet outil réaliser sur la barre (17) un filetage (18,19) à diamètre extérieur croissant.
EP19820109318 1981-10-22 1982-10-08 Procédé d'assemblage par adhérence d'aciers à béton dans la construction en béton armé Expired EP0077952B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3141928 1981-10-22
DE19813141928 DE3141928C2 (de) 1981-10-22 1981-10-22 Bewehrungsstab für Stahlbeton

Publications (2)

Publication Number Publication Date
EP0077952A1 EP0077952A1 (fr) 1983-05-04
EP0077952B1 true EP0077952B1 (fr) 1986-09-03

Family

ID=6144643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820109318 Expired EP0077952B1 (fr) 1981-10-22 1982-10-08 Procédé d'assemblage par adhérence d'aciers à béton dans la construction en béton armé

Country Status (2)

Country Link
EP (1) EP0077952B1 (fr)
DE (1) DE3141928C2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4819469A (en) * 1987-03-18 1989-04-11 Erico International Corporation Method for rolling tapered threads on bars
NL1005655C2 (nl) * 1997-03-27 1998-09-29 Hendrik Van De Riet Systeem voor het verbinden van voorwerpen.
DE19753755C2 (de) * 1997-12-04 2001-07-05 Deha Ankersysteme Schlupfarme Schraubverbindung für Stäbe im Bauwesen mit geometrisch definierter Konterung
ATE347640T1 (de) 2002-08-13 2006-12-15 Halfen Gmbh & Co Kg Schraubverbindung für kraftübertragende stäbe
CN110016995B (zh) * 2019-04-28 2021-07-13 山东大学 一种用于钢筋连接的滑动式三瓣套筒

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB672946A (en) * 1949-07-22 1952-05-28 Mccalls Macalloy Ltd Nuts, bolts and tie bars
DE1194552B (de) * 1961-06-26 1965-06-10 Beton & Monierbau Ag Zugbolzenmuffe zum Anschluss an walzprofilierte Vorspannstaebe mit kreisrundem Kernquerschnitt
DE1659264C3 (de) * 1967-09-12 1975-08-21 Wayss & Freytag Ag, 6000 Frankfurt Verfahren zum Verbinden der Enden von gerippten Betonbewehrungsstäben

Also Published As

Publication number Publication date
DE3141928A1 (de) 1983-05-11
EP0077952A1 (fr) 1983-05-04
DE3141928C2 (de) 1984-12-20

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