EP1231331A2 - Betonstahl mit Rippen, Stahlbeton - Google Patents
Betonstahl mit Rippen, Stahlbeton Download PDFInfo
- Publication number
- EP1231331A2 EP1231331A2 EP02002017A EP02002017A EP1231331A2 EP 1231331 A2 EP1231331 A2 EP 1231331A2 EP 02002017 A EP02002017 A EP 02002017A EP 02002017 A EP02002017 A EP 02002017A EP 1231331 A2 EP1231331 A2 EP 1231331A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- reinforcing steel
- rib
- ribs
- concrete
- reinforced concrete
- 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
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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
- E04C5/01—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 present invention relates to a rebar with ribs.
- the present Invention is used wherever reinforcing steel is used to manufacture Reinforced concrete can be used.
- the present invention is particularly applicable to the production of reinforced concrete, especially here in the production of reinforcing steel mesh and reinforcing steel preferably used in rings.
- reinforcing steel bars are laid crosswise on top of each other and welded at their points of contact.
- cold-rolled reinforcing steel is used.
- Reinforcing steel is also common on coils, so-called “rings”, wound up and transported on to the customer.
- this is a straightening or bending and Cutting machine fed, or for example a mesh machine to reinforcing steel mesh manufacture.
- the reinforcing steel is used in so-called roller straightening sets or alternatively straightened in rotor straightening sets. For a rebar higher Quality is increasingly used in hot-rolled reinforcing steel.
- FIG. 1a to 1d show reinforcing steel according to the prior art, as in the DIN number 488 or in building inspectorate approvals.
- the reinforcing steel 1 has four rows of (in the Ribs 2 from top to bottom.
- the rib pitch angle ⁇ between the longitudinal direction of the rib under consideration and the direction of the Longitudinal axis A of the reinforcing steel in the case of reinforcing steel according to the prior art about 60 °.
- the distance between two ribs 2 in the longitudinal direction (rib spacing) is c
- the rib head width of a rib 2 transverse to the longitudinal direction of the considered Rib is denoted by b. Is located between two adjacent ribs 2 a depression 8.
- FIG. 1d shows a section through the reinforcing steel 1 along the in FIG. 1b shown section line D.
- FIG. 1c 2a in FIG. 1c is the rib head surface
- 2b denotes the rib flank (on the other The side of the rib head surface 2a is also not visible in the drawing Rib flank present)
- 8 is the dip between two neighboring ones Ribs 2.
- 3 denotes the projection of a reinforcing steel in the longitudinal direction.
- the roughly circular contour is created by the backdrops one behind the other appearing and thus forming the circumferential contour ribs 2.
- the cutting contour 4 itself appears rather irregular. However, it occurs quite regularly in the manufacture of the reinforcing steel.
- the roughly square Basic shape 5 with possibly rounded edges and the ribs 2 by rolling rolled into the raw material. This can be hot rolling or cold rolling.
- the Overall structure in cross-sectional area can thus be imagined as ribs 2, which sit on a base body with a square cross-section (reference number 5).
- the actual cross-sectional contour 4 results depending on where the Cross section cuts the respective ribs.
- What has just been said applies to reinforcing steel with four rows of ribs.
- the rows of ribs are through in the longitudinal direction of the material running webs 6 (rib row spacing or roll gap) and, depending on the Basic shape (e.g. round, square, hexagonal, etc.) and the rib milling depth, e.g. T. separated from each other by further webs 7 ..
- the bond behavior of reinforcing steel in concrete is sketched in FIG. 2a.
- the association behavior specifies the force F with which the reinforcing steel must be pulled, so that there is a shift ⁇ 1 of the reinforcing steel in the concrete.
- the bond tension is shown over the extension path.
- the bond stress reaches a maximum.
- the strength of the reinforcing steel in the concrete decreases again because the bond of the Reinforcing steel weakened by shearing off the concrete base between the ribs becomes.
- FIG. 2b shows the expansion behavior of reinforcing steel.
- the reinforcing steel stretches in a first linear range, the elastic range, proportional to the applied force F up to a yield point F S.
- the rebar then plastically deforms. This deformation is not reversible.
- a fatigue test is shown in which the reinforcing steel is subjected to a periodically changing force that is less than F S. Although the applied force is so small that plastic deformation does not yet occur, such a load can lead to a fatigue fracture in the reinforcing steel.
- An object of the present invention is to provide a reinforcing steel, which can be used in mat machines or automatic straightening and ironing machines, without problems during processing on the machine.
- This small rib inclination angle ⁇ relative to Reinforcing steel axes have several advantages: Studies have shown that one such a low angle of inclination of the ribs significantly improves the fatigue properties can be achieved, i.e. a fatigue fracture of the reinforcing steel occurs less often or only after a longer time than with conventional reinforcing steel with a larger rib inclination angle. It occurs in the invention Reinforcing steel with a reduced rib inclination angle, less striking edges in the longitudinal direction of the reinforcing steel.
- the rib inclination angle is for all ribs of the reinforcing steel is essentially the same. So you can achieve the above Benefits over the entire length of the reinforcing steel.
- a rib head width b of the ribs is greater than 0.2 times, preferably less than 0.5 times of the nominal diameter, and more preferably 0.3 times to 0.4 times the Nominal diameter.
- the object of the present invention can also be achieved by that the ratio of the rib width in the longitudinal direction b 'to the rib spacing c in the direction of the reinforcing steel axis greater than 0.35, preferably greater than 0.4 is preferably greater than 0.45. This also leads to a more even distribution on the enveloping in the direction of the rod, which has the advantages mentioned above.
- This ratio of the rib width in the longitudinal direction to the rib spacing is suitable also when used in high-strength concrete or for an application in self-compacting concrete (SVB, slump according to ASTM at least 60 cm, preferably at least 65 cm, more preferably at least 70 cm).
- the reinforcing steel is preferably produced by hot rolling.
- the preferably rod-shaped, but often also supplied as a coil Reinforcing steel have several rows of ribs, preferably 4. However, it can 2, 3 or 6 rows of ribs can also be provided.
- the degree of rib coverage is preferably greater than 45%, more preferably greater than 50%, more preferably greater than 55%.
- the minimum value of the related rib surface is preferably in the range between 30% below and 30% above the minimum value prescribed in DIN 488 . This applies above all to reinforcing bars with a nominal diameter of greater than or equal to 4 mm.
- the invention further relates to a reinforced concrete with a reinforcing steel, which is designed as described above, wherein concrete with a compressive strength is used which is greater than 55 N / mm 2 , preferably greater than 65 N / mm 2 , ie high-strength concrete.
- the present invention also relates to the use of reinforcing steel, wherein the reinforcing steel is preferably used for the production of reinforced concrete with high-strength concrete with a strength of 55 N / mm 2 or greater, preferably 65 N / mm 2 and greater.
- the present invention is of course not limited to high strength concrete, it can also be used with self-compacting or other concrete.
- the rib pitch angle ⁇ is between 25 ° and 55 ° and preferably about 40 ° +/- 5%.
- the rib head width b is greater than 0.2 times and preferably less than 0.5 times of the diameter.
- the diameter can be the nominal diameter (i.e. the Diameter of an equally heavy rod with a circular cross-section). It can but also about the maximum diameter (corresponding to contour 3 in Fig. 1d) act or the diameter that results from the valleys 2c.
- the characteristic with regard to the rib inclination angle ⁇ can be independent of or together can be realized with the features mentioned below. Also the characteristics mentioned below with regard to rib head width b, the rib width b 'in the longitudinal direction, the related rib area and the degree of rib coverage can be viewed on their own as the subject of the invention.
- the rib head width b is larger than in the case of reinforcing steel according to the prior art.
- the ratio of the rib width in the longitudinal direction b 'to the rib spacing c is larger than 0.35, which is not the case with state of the art reinforcing steel. There is this ratio is less than 0.35.
- the invention is Reinforcing steel shown with four rows of ribs. However, it can just as well a different number of rows of ribs can be used.
- the rows of ribs preferably extend in the longitudinal direction of the reinforcing steel. In Fig. 3b there are two indicated by the reference numerals 9 and 10.
- the rows of ribs are each limited by webs 6 and 7 if necessary.
- connection of the larger rib width in the longitudinal direction b 'and the smaller one Rib inclination angle ⁇ leads to better rib filling, especially in combination and therefore less ovality. This results in one if possible large area on the envelope, evenly distributed in the longitudinal direction. These geometric properties improve the processing options on the processing machines, jamming of the reinforcing bars in the machine is prevented. There is also a larger welding area available which improves the connection between two welded reinforcing bars.
- the improved geometry results in the processing of the reinforced concrete less noise, especially in roller straightening systems and roller guides and less impact on mechanical, dynamic and geometric Properties due to the processing machines used. This means, that the processing of preferably hot-rolled steel significantly is improved.
- Reinforced concrete can be produced with a reinforcing steel as described above.
- the reinforced concrete then has a concrete and the reinforcing steel described above.
- the concrete preferably has a strength which is greater than 55 N / mm 2 .
- the use of the reinforcing steel described above for the production of reinforced concrete is also an aspect of the invention.
- the concrete used preferably has a strength of at least 55 N / mm 2 , more preferably at least 65 N / mm 2 .
- the stated strength is a compressive strength.
- Fig. 4 shows a sketch for determining the degree of rib coverage, where c is the Rib spacing, b is the rib head width and l 'the rib length.
- the degree of rib coverage is - clearly speaking - the proportion of the hatched area A on the envelope in relation to the total envelope of the reinforcing steel, where the areas of webs 6 and 7, if applicable, are included.
- the required degree of rib coverage has the advantage that the smoothness and improve the directionality of the reinforced concrete. Likewise, the risk of snagging is processing less, and the weldability is due to the larger contact areas better.
- Typical diameter of rod-shaped material of the reinforcing steel is a minimum of 4 mm, maximum 65 mm, preferably minimum 6 mm, maximum 32 mm.
- Typical lengths rod-shaped material is a minimum of 2 m, a maximum of 30 m, preferably minimal 6m, maximum 24m.
- Typical diameters of rebar rings are minimal 0.5 m, maximum 2 m, preferably minimum 0.7 m, maximum 1.8 m.
- the reinforcing steel can also be mat-shaped. Then here are bars that are like above are formed, connected to one another in a lattice shape, preferably welded.
- the reinforcing steel can also be used as prefabricated or built-in reinforcement, e.g. B. as Lattice girder, reinforcement cage or reinforcement bracket or rod designed in a fixed length his.
- the new geometry i.e. the wider rib and the lower rib inclination angle of a hot-rolled reinforcing steel that can be processed well.
- the reinforcing steel according to the invention are naturally cold rolled.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
Description
- Fig. 1a bis 1d
- eine Seitenansicht, eine um die Längsachse um 90° gedrehte Seitenansicht, eine perspektivische Ansicht sowie einen Schnitt an der Linie D von Fig. 1b eines Betonstahls nach dem Stand der Technik,
- Fig. 2a
- schematisch das Verbundverhalten von Betonstahl in Beton und Fig. 2b eine Dehnungskurve für Betonstahl,
- Fig. 3a und 3b
- zwei um 90° um die Längsachse gedrehte Ansichten eines erfindungsgemäßen Betonstahls, und
- Fig. 4
- eine Skizze zur Ermittlung des Rippenbedeckungsgrades.
- hS
- die mittlere Höhe eines beliebigen Schrärippenabschnitts der Länge Δl der in x Abschnitte unterteilten Schrägrippe
- β
- die Neigung der Rippen zur Stabachse hin
- dS
- der Nenndurchmesser des Stabes in mm
- cS
- der Mittenabstand der Schrärippen in mm
- k
- die Anzahl der Schrägrippen am Umfang
- m
- die Anzahl der Schrägrippen je Reihe
- i
- die Anzahl der Längsrippen
- hl
- die Höhe der Längsrippen
- (n), (n, l)
- Laufvariablen sind.
Claims (11)
- Betonstahl (1), insbesondere nach Anspruch 1 oder 2, mit Rippen (2), dadurch gekennzeichnet, daß eine Rippenkopfbreite b der Rippen (2) größer als das 0,2fache, vorzugsweise kleiner als das 0,5-fache, weiter vorzugsweise das 0,3- bis 0,4-fache, noch weiter vorzugsweise das 0,32- bis 0,37-fache des Nenndurchmessers beträgt.
- Betonstahl (1) mit Rippen (2), dadurch gekennzeichnet, daß der Rippenneigungswinkel β zur Längsachse des Betonstahls 25° bis 55°, vorzugsweise 35° bis 45°, weiter vorzugsweise 37° bis 42° beträgt.
- Betonstahl (1) nach Anspruch 1, dadurch gekennzeichnet, daß der Rippenneigungswinkel für alle Rippen (2) im wesentlichen gleich ist.
- Betonstahl (1), insbesondere nach einem der vorherigen Ansprüche, mit Rippen (2), dadurch gekennzeichnet, daß das Verhältnis der Rippenbreite in Längsrichtung b' zum Rippenabstand c in Richtung der Betonstahlachse (A) größer 0,35 ist, vorzugsweise größer 0,40, weiter vorzugsweise größer 0,45 .
- Betonstahl (1) nach einem der vorherigen Ansprüche dadurch gekennzeichnet, daß der Betonstahl stabfömig ausgebildet ist.
- Betonstahl (1) nach einem der vorherigen Ansprüche dadurch gekennzeichnet, daß der Betonstahl durch Warmwalzen hergestellt ist.
- Betonstahl (1) nach einem der vorherigen Ansprüche dadurch gekennzeichnet, daß er mehrere Rippenreihen aufweist, vorzugsweise vier.
- Betonstahl (1) nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Rippenbedeckungsgrad größer 45 %, vorzugsweise größer 50 %, weiter vorzugsweise größer 55 % ist.
- Betonstahl (1) nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die bezogene Rippenfläche fR kleiner als 130 % der in DIN 488 vorgeschriebenen Mindestwertes, vorzugsweise kleiner als 115 %, weiter vorzugsweise kleiner 100 % ist.
- Stahlbeton (1) mit einem Betonstahl nach einem der vorstehenden Ansprüche und einem Beton, vorzugsweise einer Festigkeit, die größer als 55 N/mm2 ist, weiter vorzugsweise größer als 65 N/mm2.
- Verwendung von Betonstahl nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Betonstahl zur Herstellung von Stahlbeton mit Beton mit einer Festigkeit von vorzugsweise größer 55 N/mm2, weiter vorzugsweise größer 65 N/mm2 verwendet wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10105667 | 2001-02-08 | ||
DE10105667A DE10105667A1 (de) | 2001-02-08 | 2001-02-08 | Betonstahl mit Rippen, Stahlbeton |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1231331A2 true EP1231331A2 (de) | 2002-08-14 |
EP1231331A3 EP1231331A3 (de) | 2002-12-04 |
EP1231331B1 EP1231331B1 (de) | 2006-12-20 |
Family
ID=7673249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02002017A Expired - Lifetime EP1231331B1 (de) | 2001-02-08 | 2002-02-06 | Betonstahl mit Rippen, Stahlbeton |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1231331B1 (de) |
AT (1) | ATE348923T1 (de) |
DE (2) | DE10105667A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1512805A1 (de) * | 2002-02-18 | 2005-03-09 | Max Aicher | Rohrförmiger gerippter Bewehrungsstahl, Verfahren zum Herstellen eines rohrförmigen gerippten Bewehrungsstahls und Verwendung eines rohrförmigen Bewehrungsstahls |
CN101942887A (zh) * | 2010-09-09 | 2011-01-12 | 天津市建科机械制造有限公司 | 四面带肋钢筋 |
CN102102424A (zh) * | 2011-03-03 | 2011-06-22 | 天津市银龙预应力钢材集团有限公司 | 一种带有断续螺旋肋的无脊钢筋 |
CN110392759A (zh) * | 2016-12-23 | 2019-10-29 | 伊戈尔·尼古拉耶维奇·吉洪诺夫 | 带肋的加强杆 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1609638A1 (de) * | 1966-01-04 | 1970-07-30 | Filiton Ag | Bewehrungsstab fuer den Stahlbetonbau |
FR2031405A7 (de) * | 1969-02-13 | 1970-11-20 | Hochwald Drahtwerk Gmbh | |
DE1759485A1 (de) * | 1968-05-06 | 1971-07-08 | Schwarz & Meissner Bewehrungst | Bewehrungsstab |
GB1277899A (en) * | 1968-06-25 | 1972-06-14 | Baustahlgewebe Gmbh | Improvements in or relating to rods for making spot-welded reinforcing mats for use in reinforced concrete |
DE2123818A1 (de) * | 1971-05-13 | 1973-01-04 | Meyer Stahl Draht U Roehrenwer | Gerippter betonbewehrungsstab und vorrichtung zu seiner herstellung |
FR2350441A1 (fr) * | 1976-05-07 | 1977-12-02 | Centre Rech Metallurgique | Rond a beton en acier avec nervures longitudinales diametralement opposees et des nervures obliques |
US4811541A (en) * | 1985-05-15 | 1989-03-14 | Ulrich Finsterwalder | Threaded bar |
EP0399910A1 (de) * | 1989-05-26 | 1990-11-28 | Acor Aciers De Construction Rationalises | Rippenstahl mit hoher Haftfestigkeit und dessen Herstellungsverfahren |
EP0451798A2 (de) * | 1990-04-09 | 1991-10-16 | Aicher, Max, Dipl.-Ing. | Betonrippenstahl mit kaltgewalzten Schrägrippen |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD250972A1 (de) * | 1986-07-14 | 1987-10-28 | Brandenburg Stahl Walzwerk | Profilierter betonbewehrungsstab |
-
2001
- 2001-02-08 DE DE10105667A patent/DE10105667A1/de not_active Ceased
-
2002
- 2002-02-06 EP EP02002017A patent/EP1231331B1/de not_active Expired - Lifetime
- 2002-02-06 DE DE50208977T patent/DE50208977D1/de not_active Expired - Lifetime
- 2002-02-06 AT AT02002017T patent/ATE348923T1/de active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1609638A1 (de) * | 1966-01-04 | 1970-07-30 | Filiton Ag | Bewehrungsstab fuer den Stahlbetonbau |
DE1759485A1 (de) * | 1968-05-06 | 1971-07-08 | Schwarz & Meissner Bewehrungst | Bewehrungsstab |
GB1277899A (en) * | 1968-06-25 | 1972-06-14 | Baustahlgewebe Gmbh | Improvements in or relating to rods for making spot-welded reinforcing mats for use in reinforced concrete |
FR2031405A7 (de) * | 1969-02-13 | 1970-11-20 | Hochwald Drahtwerk Gmbh | |
DE2123818A1 (de) * | 1971-05-13 | 1973-01-04 | Meyer Stahl Draht U Roehrenwer | Gerippter betonbewehrungsstab und vorrichtung zu seiner herstellung |
FR2350441A1 (fr) * | 1976-05-07 | 1977-12-02 | Centre Rech Metallurgique | Rond a beton en acier avec nervures longitudinales diametralement opposees et des nervures obliques |
US4811541A (en) * | 1985-05-15 | 1989-03-14 | Ulrich Finsterwalder | Threaded bar |
EP0399910A1 (de) * | 1989-05-26 | 1990-11-28 | Acor Aciers De Construction Rationalises | Rippenstahl mit hoher Haftfestigkeit und dessen Herstellungsverfahren |
EP0451798A2 (de) * | 1990-04-09 | 1991-10-16 | Aicher, Max, Dipl.-Ing. | Betonrippenstahl mit kaltgewalzten Schrägrippen |
Non-Patent Citations (2)
Title |
---|
"DIN 488, Teil 2: Betonstahl; betonstabstahl, Masse und Gewichte" Juni 1986 (1986-06) , DIN DEUTSCHES INSTITUT F]R NORMUNG E.V. , BERLIN XP002208101 * Seite 1 - Seite 5 * * |
PETERSEN, CHRISTIAN: "Stahlbau" 1993 , FRIEDR. VIEWEG & SOHN VERLAGSGESELLSCHAFT MBH , BRAUNSCHWEIG/WIESBADEN XP002208100 * Seite 31 * * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1512805A1 (de) * | 2002-02-18 | 2005-03-09 | Max Aicher | Rohrförmiger gerippter Bewehrungsstahl, Verfahren zum Herstellen eines rohrförmigen gerippten Bewehrungsstahls und Verwendung eines rohrförmigen Bewehrungsstahls |
CN101942887A (zh) * | 2010-09-09 | 2011-01-12 | 天津市建科机械制造有限公司 | 四面带肋钢筋 |
CN102102424A (zh) * | 2011-03-03 | 2011-06-22 | 天津市银龙预应力钢材集团有限公司 | 一种带有断续螺旋肋的无脊钢筋 |
CN110392759A (zh) * | 2016-12-23 | 2019-10-29 | 伊戈尔·尼古拉耶维奇·吉洪诺夫 | 带肋的加强杆 |
EP3561195A4 (de) * | 2016-12-23 | 2020-11-11 | Igor Nikolaevich Tikhonov | Gerippter bewehrungsstab |
Also Published As
Publication number | Publication date |
---|---|
DE10105667A1 (de) | 2002-09-26 |
EP1231331A3 (de) | 2002-12-04 |
ATE348923T1 (de) | 2007-01-15 |
EP1231331B1 (de) | 2006-12-20 |
DE50208977D1 (de) | 2007-02-01 |
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