EP0222845B1 - Gewindestab - Google Patents

Gewindestab Download PDF

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Publication number
EP0222845B1
EP0222845B1 EP86903213A EP86903213A EP0222845B1 EP 0222845 B1 EP0222845 B1 EP 0222845B1 EP 86903213 A EP86903213 A EP 86903213A EP 86903213 A EP86903213 A EP 86903213A EP 0222845 B1 EP0222845 B1 EP 0222845B1
Authority
EP
European Patent Office
Prior art keywords
ribs
section
rod
threaded rod
wave
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86903213A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0222845A1 (de
Inventor
Ulrich Dr. Finsterwalder
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.)
Stahlwerk Annahuette Max Aicher & Co KG Te H GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT86903213T priority Critical patent/ATE85382T1/de
Publication of EP0222845A1 publication Critical patent/EP0222845A1/de
Application granted granted Critical
Publication of EP0222845B1 publication Critical patent/EP0222845B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
    • 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 concrete reinforcing bar, in particular a tensioning bar, according to the preamble of claim 1, d. H. on a threaded rod.
  • Such threaded rods are known from DE-PS 17 84 630.
  • This threaded rod has hot-rolled, helically extending ribs which are arranged on two opposite sides of the rod circumference and form parts of a thread.
  • the ribs only extend in their full height over about a third of the rod circumference and are inclined towards one another with their end faces which merge into the smooth rod surface of the core cross section.
  • the ribs, which are rolled onto the circular core cross section have a trapezoidal cross section with slightly rounded throats.
  • Such threaded rods are used, for example, as slack rebars in reinforced concrete structures or as tension rods in prestressed concrete structures or e.g. B. also used in cables of cable-stayed bridges.
  • this threaded rod is advantageous, since during hot rolling the threaded ribs are more easily filled with material, which reduces the amount of waste.
  • a reinforcement bar for concrete structures is known, which, however, is not designed as a threaded bar.
  • the aim of this reinforcement bar is to achieve a surface surface that is as smooth as possible in order to keep the shear and shear forces and the creep of the bar as small as possible.
  • the reinforcement bar has a variable cross-section, which periodically changes from a transverse ellipse into a circle, from this into a vertical ellipse and then again into a circle.
  • the center of gravity of this rebar is a straight line and runs through the centers of the circles and ellipses.
  • the cross section of this reinforcing bar should be approximately constant over its entire length.
  • This known reinforcement bar can be produced, for example, by rolling, for example starting from a uniformly elliptically shaped steel bar. In such a rolling process, it is relatively difficult to ensure the straightness of the bar with low manufacturing tolerances.
  • the invention has for its object to provide a threaded rod of the type in question, which can be easily manufactured, has high mechanical strength and high fatigue strength even with load changes and in which the required tolerances are reduced, particularly in the area of connections, such as socket connections or connection points can.
  • the cross-section of the thread ribs shows a smooth course, wherein a trough is provided between adjacent thread ribs, which adjoins the course of the ribs smoothly.
  • These ribs are placed on the otherwise circular core cross section, the troughs located between the ribs engaging in the core cross section.
  • the shallow hollows merge into the surface of the core cross-section with an almost constant transition.
  • the flat troughs act as pressure points during rolling, through which the threaded ribs are filled evenly and more easily with material.
  • the deepest point of the troughs lies in the longitudinal plane of symmetry of the threaded rod, which contains the center of the thread ribs. Opposite troughs serve as pressure points in pairs.
  • the filling of the ribs during rolling is also favored by the rounded shape in the area of the back of the threaded ribs.
  • the cross-sectional area of the threaded rod is practically constant over its length, which is also advantageous for the rolling process.
  • the end faces of the threaded ribs are inclined towards each other as in the known threaded rod according to the patent 17 84 630. This is necessary to enable the threaded rod to exit the rollers after hot rolling and to straighten the threaded rod later.
  • the regular smooth undulating course of ribs and subsequent troughs in the longitudinal plane of symmetry of the threaded rod intersecting the ribs can, for. B. be composed of two circular sections; a course is also possible which follows a sine, for example.
  • each trough is opposed by a threaded rib on the radially opposite side of the threaded rod and the threaded ribs next to the rod core contribute to the transmission of the clamping force.
  • the tolerances required for socket connections can also be reduced, so that threaded rods assembled over socket connections can also be better used in slack reinforcements.
  • the possibility of reducing the tolerances of threaded rods and sleeves also results from the fact that the tools required to produce the threaded rod, in particular the rollers, have a longer service life due to the lack of grooves and edges; the rollers can also be made mechanized. The use of cutters is also possible.
  • FIG. 1 shows part of a threaded rod 1 with threaded ribs 2 and troughs 3 lying between them shown.
  • the threaded ribs 2 extend on both sides of the threaded rod 1 in each case approximately over a third of the rod circumference and merge with the mutually inclined end faces 4 into the otherwise circular rod core 5.
  • the troughs 3 engage in the rod core 5.
  • the course of the threaded ribs 2 and trough in a longitudinal section containing the central axis 6 of the threaded rod 1 is uniformly undulating, for example, according to FIG. 1, is composed of two circular sections K1 and K2, so that there are no notches or throats during rolling.
  • the edges 7 of the threaded ribs 2 at the transition into the inclined end faces 4 are rounded off, as is shown in FIG. 2.
  • the cross-sectional shape of the ribs and troughs therefore does not have to be the same.
  • the shape of the troughs is also exemplary. It is essential that they engage locally between the thread ribs in the core cross section and thus as pressure points Act. They are dimensioned so that during the rolling process, by engaging in the core cross-section between the ribs, these are filled with material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Amplifiers (AREA)
  • Shovels (AREA)
EP86903213A 1985-05-15 1986-05-15 Gewindestab Expired - Lifetime EP0222845B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86903213T ATE85382T1 (de) 1985-05-15 1986-05-15 Gewindestab.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3517638 1985-05-15
DE19853517638 DE3517638A1 (de) 1985-05-15 1985-05-15 Gewindestab

Publications (2)

Publication Number Publication Date
EP0222845A1 EP0222845A1 (de) 1987-05-27
EP0222845B1 true EP0222845B1 (de) 1993-02-03

Family

ID=6270882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86903213A Expired - Lifetime EP0222845B1 (de) 1985-05-15 1986-05-15 Gewindestab

Country Status (8)

Country Link
US (1) US4811541A (enrdf_load_stackoverflow)
EP (1) EP0222845B1 (enrdf_load_stackoverflow)
JP (1) JPH0660519B2 (enrdf_load_stackoverflow)
AT (1) ATE85382T1 (enrdf_load_stackoverflow)
BR (1) BR8606675A (enrdf_load_stackoverflow)
DE (2) DE3517638A1 (enrdf_load_stackoverflow)
SU (1) SU1558305A3 (enrdf_load_stackoverflow)
WO (1) WO1986006777A1 (enrdf_load_stackoverflow)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3703974A1 (de) * 1987-02-10 1988-08-18 Dyckerhoff & Widmann Ag Zugglied aus hochfesten fasern
DE8717650U1 (de) * 1987-09-11 1989-08-31 ARBED S.A., Luxemburg/Luxembourg Betonbewehrungsstab, insbesondere Betonrippenstab
DE8717648U1 (de) * 1987-09-11 1989-09-28 ARBED S.A., Luxemburg/Luxembourg Warmgewalzter Betonbewehrungsstab, insbesondere Betonrippenstab
DE3816930A1 (de) * 1988-05-11 1989-11-23 Heribert Hiendl Rueckbiegefaehiger betonstahl
USD315415S (en) 1989-08-22 1991-03-12 Anthony Richard Y Decorative vertical support
DE4240968C1 (de) * 1992-12-05 1994-02-10 Aicher Max Mehrteiliger Stahlstab, insbesondere Betonbewehrungsstab, Spannstab oder dergleichen
AUPQ624600A0 (en) * 2000-03-15 2000-04-06 Gray, Evelyn Frances Process for forming a threaded member
DE10105667A1 (de) * 2001-02-08 2002-09-26 Badische Stahlwerke Gmbh Betonstahl mit Rippen, Stahlbeton
US7624556B2 (en) 2003-11-25 2009-12-01 Bbv Vorspanntechnik Gmbh Threaded deformed reinforcing bar and method for making the bar
BRPI0403995A (pt) * 2004-07-12 2006-02-21 Bmp Siderurgia S A vergalhão com núcleo octogonal destinado à construção civil
US7802951B2 (en) * 2006-12-18 2010-09-28 Sandisk Corporation Anti-rotational adhesive insert
WO2011163449A1 (en) 2010-06-24 2011-12-29 Nucor Steel Birmingham, Inc. A tensionable threaded rebar bolt
CL2010000889A1 (es) * 2010-08-20 2011-03-11 Pablo Covarrubias Torres Jaun Barra de acero con resaltes,para conformar armaduras de hormigones, para que el hormigon permanezca en la zona elastica de resistencia a la compresion, con una tension menor al 50% de la tension de rotura y donde la barra posee un diametro d, resaltes dispuestos a una distancia l entre si y de una altura h, con un area menor a un cuarto del perimetro por l
US9010165B2 (en) 2011-01-18 2015-04-21 Nucor Corporation Threaded rebar manufacturing process and system
US9243406B1 (en) * 2015-01-21 2016-01-26 TS—Rebar Holding, LLC Reinforcement for reinforced concrete
CN107130739A (zh) * 2017-06-12 2017-09-05 姚圣法 适用于混凝土的钢筋
US10260234B1 (en) * 2017-12-22 2019-04-16 Yu-Liang Kuo Deformed reinforcing bar, truss structure, and floor module structure

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB150451A (en) * 1919-06-07 1920-09-07 Improved Twisted Steel Bar Com Improvements relating to reinforced concrete construction
BE464437A (enrdf_load_stackoverflow) * 1944-05-26 1945-05-31 Eugene Freyssinet
FR1109237A (fr) * 1954-07-20 1956-01-24 Union Siderurgique Lorraine Si Armature pour béton armé
GB835934A (en) * 1956-11-12 1960-05-25 Erich Luebbert Improvements in or relating to prestressed concrete
GB881839A (en) * 1957-03-22 1961-11-08 Erich Lubbert Improvements in or relating to reinforcing rods for concrete
FR1189577A (fr) * 1958-01-07 1959-10-05 Cie De Pont A Mousson Armature perfectionnée pour élément de construction en béton précontraint et élément en comportant application
CH418584A (de) * 1963-09-04 1966-08-15 Salm Mathias Distanzhalter für Armierungseisen
DE1905704U (de) * 1964-04-30 1964-12-03 Maximilianshuette Eisenwerk Als betonbewehrung dienender spannstahl.
DE1659125A1 (de) * 1967-09-23 1970-07-02 Ilseder Huette Bewehrungs-,vorzugsweise Spannstahl
US3561185A (en) * 1968-02-12 1971-02-09 Dyckerhoff & Widmann Ag Armoring and stressing rod for concrete
DE1784630C2 (de) * 1968-08-29 1974-09-19 Dyckerhoff & Widmann Ag, 8000 Muenchen Betonbewehrungsstab, insbesondere Spannstab
US3782839A (en) * 1970-09-01 1974-01-01 Salzgitter Peine Stahlwerke Reinforcing bar, bolt or the like
JPS521918A (en) * 1975-06-23 1977-01-08 Kobe Steel Ltd Special form steel bar for strengthening concrete

Also Published As

Publication number Publication date
ATE85382T1 (de) 1993-02-15
JPS63500191A (ja) 1988-01-21
DE3517638C2 (enrdf_load_stackoverflow) 1989-02-02
JPH0660519B2 (ja) 1994-08-10
EP0222845A1 (de) 1987-05-27
SU1558305A3 (ru) 1990-04-15
DE3517638A1 (de) 1986-11-20
DE3687693D1 (de) 1993-03-18
US4811541A (en) 1989-03-14
BR8606675A (pt) 1987-08-11
WO1986006777A1 (en) 1986-11-20

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