EP0222845A1 - Gewindestab. - Google Patents
Gewindestab.Info
- Publication number
- EP0222845A1 EP0222845A1 EP86903213A EP86903213A EP0222845A1 EP 0222845 A1 EP0222845 A1 EP 0222845A1 EP 86903213 A EP86903213 A EP 86903213A EP 86903213 A EP86903213 A EP 86903213A EP 0222845 A1 EP0222845 A1 EP 0222845A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ribs
- threaded rod
- section
- bar
- threaded
- 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.)
- Granted
Links
- 230000002787 reinforcement Effects 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 6
- 239000004567 concrete Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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 reinforcement bar, in particular a tensioning bar, according to the preamble of claim 1, ie. H. on a threaded rod.
- Such threaded rods are known from DE-PS 17 84 630.
- This threaded rod has hot-rolled ribs which run in the shape of a very outer line and are arranged on two opposite sides of the rod circumference and form parts of a thread.
- the full height of the ribs only extends over about a third of the rod circumference and, with their end faces merging into the smooth rod surface of the core cross section, are inclined towards one another.
- 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. B. as slack reinforcement bars in reinforced concrete buildings or as tension rods in prestressed concrete buildings or z. 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 number of rejects.
- the invention is based on the object of specifying a threaded rod of the type in question which can be easily manufactured, has high mechanical strength and high fatigue strength even in the event of load changes and in which the required tolerances, in particular in the area of connections, such as socket connections or connection points can be reduced.
- the cross-section of the threaded ribs has a smooth course, a trough being provided between adjacent threaded ribs, which trough smoothly adjoins the course of the ribs.
- 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 containing the center of the threaded ribs. Opposing 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 one another, 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 intersecting plane of symmetry of the threaded rod 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 required tolerances for socket connections can also be reduced, so that threaded rods assembled via 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 thread stack, 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.
- Figure 1 is a view of a threaded rod according to the invention with a partial longitudinal cross section
- Figure 2 shows a cross section longitudinally through the threaded rod
- Figure 3 is a plan view of a threaded rod according to the invention.
- 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 K 1 and K 2, 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, as shown in FIG. 2.
- FIG 3 shows locations with the same radii of the threaded rod, including the line Rmax corresponding to the maximum radius of the threaded rod in the highest area of the threaded ribs, the line RK corresponding to the radius of the rod core and the deepest point of the troughs Rmin corresponding to the minimum radius of the threaded rod. Some intermediate lines with the same radius are also shown. This shows the smooth and smooth transition between threaded ribs and hollows as well as between hollows and rod core. The height of the threaded ribs is generally chosen to be greater than the depth of the troughs, in each case in relation to the core cross section.
- 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 threaded 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)
- Shovels (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Amplifiers (AREA)
Description
Claims
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 |
---|---|---|---|
DE19853517638 DE3517638A1 (de) | 1985-05-15 | 1985-05-15 | Gewindestab |
DE3517638 | 1985-05-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0222845A1 true EP0222845A1 (de) | 1987-05-27 |
EP0222845B1 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 (de) |
EP (1) | EP0222845B1 (de) |
JP (1) | JPH0660519B2 (de) |
AT (1) | ATE85382T1 (de) |
BR (1) | BR8606675A (de) |
DE (2) | DE3517638A1 (de) |
SU (1) | SU1558305A3 (de) |
WO (1) | WO1986006777A1 (de) |
Families Citing this family (16)
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 |
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)
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 (de) * | 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 |
-
1985
- 1985-05-15 DE DE19853517638 patent/DE3517638A1/de active Granted
-
1986
- 1986-05-15 BR BR8606675A patent/BR8606675A/pt not_active IP Right Cessation
- 1986-05-15 WO PCT/DE1986/000207 patent/WO1986006777A1/de active IP Right Grant
- 1986-05-15 DE DE8686903213T patent/DE3687693D1/de not_active Expired - Fee Related
- 1986-05-15 AT AT86903213T patent/ATE85382T1/de not_active IP Right Cessation
- 1986-05-15 US US07/040,783 patent/US4811541A/en not_active Expired - Fee Related
- 1986-05-15 JP JP61502947A patent/JPH0660519B2/ja not_active Expired - Lifetime
- 1986-05-15 EP EP86903213A patent/EP0222845B1/de not_active Expired - Lifetime
-
1987
- 1987-01-14 SU SU874028843A patent/SU1558305A3/ru active
Non-Patent Citations (1)
Title |
---|
See references of WO8606777A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE3687693D1 (de) | 1993-03-18 |
JPS63500191A (ja) | 1988-01-21 |
BR8606675A (pt) | 1987-08-11 |
DE3517638A1 (de) | 1986-11-20 |
JPH0660519B2 (ja) | 1994-08-10 |
US4811541A (en) | 1989-03-14 |
DE3517638C2 (de) | 1989-02-02 |
EP0222845B1 (de) | 1993-02-03 |
WO1986006777A1 (en) | 1986-11-20 |
SU1558305A3 (ru) | 1990-04-15 |
ATE85382T1 (de) | 1993-02-15 |
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