EP1231331A2 - Acier à béton nervuré et béton armé - Google Patents

Acier à béton nervuré et béton armé Download PDF

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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
Application number
EP02002017A
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German (de)
English (en)
Other versions
EP1231331A3 (fr
EP1231331B1 (fr
Inventor
Jürgen Schulz
Richard Langenecker
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.)
Badische Stahlwerke AG
Original Assignee
Badische Stahlwerke 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 Badische Stahlwerke AG filed Critical Badische Stahlwerke AG
Publication of EP1231331A2 publication Critical patent/EP1231331A2/fr
Publication of EP1231331A3 publication Critical patent/EP1231331A3/fr
Application granted granted Critical
Publication of EP1231331B1 publication Critical patent/EP1231331B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E04C5/01—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)
EP02002017A 2001-02-08 2002-02-06 Acier à béton nervuré et béton armé Expired - Lifetime EP1231331B1 (fr)

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 (fr) 2002-08-14
EP1231331A3 EP1231331A3 (fr) 2002-12-04
EP1231331B1 EP1231331B1 (fr) 2006-12-20

Family

ID=7673249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02002017A Expired - Lifetime EP1231331B1 (fr) 2001-02-08 2002-02-06 Acier à béton nervuré et béton armé

Country Status (3)

Country Link
EP (1) EP1231331B1 (fr)
AT (1) ATE348923T1 (fr)
DE (2) DE10105667A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1512805A1 (fr) * 2002-02-18 2005-03-09 Max Aicher Acier d'armature cannelé tubulaire, procédé de fabrication d'un acier d'armature cannelé tubulaire et utilisation d'un acier d'armature tubulaire
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1609638A1 (de) * 1966-01-04 1970-07-30 Filiton Ag Bewehrungsstab fuer den Stahlbetonbau
FR2031405A7 (fr) * 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 (fr) * 1989-05-26 1990-11-28 Acor Aciers De Construction Rationalises Fil d'acier nervuré à haute adhérence et son procédé de fabrication
EP0451798A2 (fr) * 1990-04-09 1991-10-16 Aicher, Max, Dipl.-Ing. Armature de béton nervurée à nervures obliques laminées à froid

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD250972A1 (de) * 1986-07-14 1987-10-28 Brandenburg Stahl Walzwerk Profilierter betonbewehrungsstab

Patent Citations (9)

* Cited by examiner, † Cited by third party
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 (fr) * 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 (fr) * 1989-05-26 1990-11-28 Acor Aciers De Construction Rationalises Fil d'acier nervuré à haute adhérence et son procédé de fabrication
EP0451798A2 (fr) * 1990-04-09 1991-10-16 Aicher, Max, Dipl.-Ing. Armature de béton nervurée à nervures obliques laminées à froid

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1512805A1 (fr) * 2002-02-18 2005-03-09 Max Aicher Acier d'armature cannelé tubulaire, procédé de fabrication d'un acier d'armature cannelé tubulaire et utilisation d'un acier d'armature tubulaire
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 (fr) * 2016-12-23 2020-11-11 Igor Nikolaevich Tikhonov Tige d'armature à profil périodique

Also Published As

Publication number Publication date
DE10105667A1 (de) 2002-09-26
EP1231331A3 (fr) 2002-12-04
ATE348923T1 (de) 2007-01-15
EP1231331B1 (fr) 2006-12-20
DE50208977D1 (de) 2007-02-01

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