EP0184995A2 - Système d'armature empêchant le cissaillement - Google Patents

Système d'armature empêchant le cissaillement Download PDF

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Publication number
EP0184995A2
EP0184995A2 EP85810587A EP85810587A EP0184995A2 EP 0184995 A2 EP0184995 A2 EP 0184995A2 EP 85810587 A EP85810587 A EP 85810587A EP 85810587 A EP85810587 A EP 85810587A EP 0184995 A2 EP0184995 A2 EP 0184995A2
Authority
EP
European Patent Office
Prior art keywords
push
connecting rods
bars
reinforcement
cross
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
EP85810587A
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German (de)
English (en)
Other versions
EP0184995B1 (fr
EP0184995A3 (en
Inventor
Ulisse C. Aschwanden
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to AT85810587T priority Critical patent/ATE65817T1/de
Publication of EP0184995A2 publication Critical patent/EP0184995A2/fr
Publication of EP0184995A3 publication Critical patent/EP0184995A3/de
Application granted granted Critical
Publication of EP0184995B1 publication Critical patent/EP0184995B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional [3D] extent, e.g. lattice girders
    • E04C5/0645Shear reinforcements, e.g. shearheads for floor slabs
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/43Floor structures of extraordinary design; Features relating to the elastic stability; Floor structures specially designed for resting on columns only, e.g. mushroom floors

Definitions

  • the invention relates to a shear reinforcement system to ensure the load-bearing capacity of zones of reinforced concrete plates that are subject to shear forces, in particular zones of flat slabs that are at risk of punching, each with a lower and upper reinforcement included therein, running parallel to the flat slab and comprising at least one reinforcement layer.
  • a common example of such a reinforced concrete slab is the flat ceiling above an extensive underground parking space for commercial vehicles, on which there is a parking lot, and which rests all around on walls, but between them on a support or the majority thereof.
  • a shear load acts on the ceiling, but a much larger one on the much smaller circumference of a column.
  • an upward transverse force acts on the ceiling, but immediately outside this area there is a downward force of the same amount from the weight of the ceiling and its load, i.e. along the circumference of the column, the ceiling is severely sheared and in the surrounding zone Bend claims what is known to be a very unfavorable type of stress in concrete. This creates the danger that the ceiling will be punched through there.
  • zones of reinforced concrete slabs e.g. Flat ceilings
  • an extremely complex and dense steel reinforcement e.g. consisting of lower and upper reinforcement layers crossing one another in the longitudinal and transverse directions, connected by countless individual so-called push bars, the placement and fastening of which is extremely critical, and when assembling you usually have to do spacing -Devices to help and you can at least partially the reinforcement bars just insert lengthways.
  • Some embodiments of the new push reinforcement system have the common feature that the connecting rods directly above and / or under the webs of the push bar in a mutual distance parallel to each other, which is smaller than the push bar width, and that the push bars are perpendicular to the connecting rods and along these, at least insofar as it is not the outer on both sides, so alternately laterally offset that they are at least two each Cross connecting rods and, thanks to the arrangement and firm connection at the intersection points, bring about a firm connection of all connecting rods with one another, so that the drawer element as a whole forms a coherent whole.
  • the push bars in the direction of the connecting rods are at least approximately evenly spaced in rows and they are laterally offset along one of the connecting rods in such a way that they alternate between this and the adjacent connecting rod on the left, this and the adjacent connecting rod on the right, and the two left and right adjacent connecting rods, but then do not cross the relevant connecting rod itself and are firmly connected to it.
  • At least some of the connecting rods can be interrupted where push bars cross the two connecting rods on the left and right, but not the connecting rod in question.
  • the other of these variants maintains the uniformity of the structure when assembling two or more push cage elements in that push bars of full width are alternately provided at least along one outer connecting bar, which push bars cross the outer and the next inner connecting bar and are firmly connected thereto, and push bars of less , eg half width, which only cross the outer connecting rod and are firmly connected to it.
  • Another embodiment with the aforementioned common feature is designed so that the distance from push bar to push bar in the direction of the connecting rods is alternately equal to a constant value and zero, and that in the latter case the two adjoining push bars 33 forming a pair of push bars are laterally offset from each other that one leg of one is in the middle between the legs of the other. In this case, equal distances between the push arm legs in the longitudinal direction and in the transverse direction are made possible, which will be discussed in more detail below.
  • longitudinal connecting rods and cross connecting rods are provided as connecting rods, each of which runs parallel to one another at a distance from rod to rod approximately equal to twice the push bar width, cross each other at right angles and at their crossing points are firmly connected to each other, and that push bars are arranged transversely to each longitudinal connecting rod, which they cross in the middle of their web, where they are firmly connected to it. It is then expedient to arrange the push bars on the longitudinal connecting rods approximately in the middle between the transverse connecting rods. So this is a very regular arrangement: the individual push bars are aligned with each other in the longitudinal and transverse directions. They do not have to connect connecting rods, but the cross-connecting rods serve this purpose separately,
  • a variant of this is that longitudinal and transverse connecting rods are provided as connecting rods, each of which is at a distance from rod to rod equal to the push bar width, cross each other at right angles and is firmly connected to one another at their crossing points, and that the push bar is transverse stand on two adjacent longitudinal connecting rods and cross them at the lower end of their legs, where they are firmly connected to them.
  • the smaller distances between the connecting rods compared to the previous one, as well as the additional connection of two rods by the push bar naturally lead to greater stability of the entire push basket element;
  • the first step here is to attach the push bars as regularly as in the previous arrangement, i.e. such that they are aligned with each other in the longitudinal and transverse directions, and the thrust arm legs can also be given equal distances in both directions.
  • a connection at the crossing points can be e.g. Manufacture by using a pipe fitting consisting of three mutually perpendicular pieces of pipe and inserting the longitudinal and transverse connecting rod as well as the push bracket leg in order to glue them, e.g. with an epoxy resin with hardener or with a cyanoacrylate.
  • the push bars laterally offset, so that they alternately connect this along a longitudinal connecting rod with the one on the left and the one on the right.
  • the cross-connecting rods can also be omitted.
  • the push bars are hook-like bent by at least approximately 180 ° in such a way that bars of the upper reinforcement can be inserted into the hook-like bends, and that the push bars are aligned for the same purpose so that the hook-like bends are aligned with one another in rows.
  • the legs of the push bars can each have the same distances from one another in the longitudinal direction and in the transverse direction.
  • the arm leg density is then isotropic. This is advantageous if the transverse force is approximately the same in both directions or approximately constant around the support. Another advantage is that with large transverse forces you can choose correspondingly small stirrup leg distances without necessarily having to accept smaller ones in one direction, which results in a corresponding saving in material.
  • the other embodiments with a fundamentally anisotropic stirrup leg density are in place when transverse forces of different magnitudes are specified in the longitudinal and transverse directions; of course such drawer elements must then be correctly arranged on the construction site - not rotated by 90 °, i.e. then they are not easily foolproof.
  • the connecting rods or the longitudinal connecting rods and / or the transverse connecting rods have a smaller mutual distance in the area of the edges of the drawer element than in the middle, and / or that transverse connecting rods are only provided in the relevant edge areas in addition to the longitudinal connecting rods .
  • the described embodiments suggest others to those skilled in the art, including those where the drawer element is not, as is most often used, rectangular or in plan is square, but has such a shape that it can be inscribed in a parallelogram, circle or circle sector.
  • the connecting rods can run parallel to two mutually opposite parallelogram sides or be arranged radially.
  • the material from which the drawer element is made is worth mentioning, because it plays a crucial role in the strength and durability of a building in places of high stress.
  • the durability is not a decisive factor or, in the opinion of the owner, besides irrelevant of the costs, the drawer element can consist of ordinary reinforcing steel in the way that has long been common for reinforcement parts.
  • the drawer element be made of smooth or at least partially profiled round steel, which is coated with a corrosion-resistant and diffusion-tight plastic, or of stainless steel.
  • a corrosion-resistant and diffusion-tight plastic or of stainless steel.
  • the suitability of the latter is beyond question and the higher costs are disproportionate to the damage it prevents.
  • Certain acids, to a certain extent, are attacked by certain acids if they are very dilute and therefore have a high degree of dissociation, but this is only manifested by a surface discoloration, which is not accompanied by a noticeable increase in volume.
  • Cocosamine after curing, this is sufficiently elastic even without a plasticizer, so that it does not form any cracks as a coating, and is perfectly diffusion-tight even against the smallest molecules, and it is also one of the few plastics that are permanently resistant to those pollutants. However, this does not exclude that other plastics with properties suitable for the present purpose are found.
  • FIG. 1 shows on a support 1, which is indicated with a bold square, a section of a flat slab 2, while the new shear reinforcement system in it hinted at with four composite drawer elements 3 or a correspondingly larger, and with longitudinally extending lower and upper reinforcement layers 4, 4 'and transverse and lower and upper reinforcement layers 5, 5 ".
  • FIG. 1 is viewed as a view from above
  • FIG. 2 is the section through the support 1 of the same arrangement seen from the lower edge of the sheet
  • the representation of the drawer element 3 in FIG. 2 could only correspond to a specific embodiment - the one from FIGS. 9 to 11 was chosen - but is not to be understood in particular why here also all parts of the drawer element, generally meant according to the invention, are denoted uniformly by 3.
  • a first embodiment of the drawer element is shown in Figures 3 to 5; in Figure 3 in top view, in Figure 4 in side view from the direction in Figure 3 below, in Figure 5 for illustration in perspective.
  • the mutual distance from connecting rods 32 is smaller than the width of push bars 30, each of which is firmly connected to the two connecting bars 32 crossing it, while narrower push bars 31 at the edge ensure a more uniform finish.
  • the mutual spacing of connecting rods 35 is smaller than the width of push bars 33 crossing them, each of which crosses two connecting rods and is firmly connected thereto; the mutual distance of the push bars 33 in the direction of the connecting rods 35 is, however, alternately equal to a constant value and equal to zero, while the legs of the push bars in this direction and transversely to them have the same distances.
  • narrower push brackets 34 ensure a uniform closure and the connecting rods 35 are provided at a smaller distance and cross-connecting rods 36 for stiffening the push basket element.
  • FIG. 9 to 11 represent a third embodiment of the drawer element, in which push brackets 37 are fastened on longitudinal connecting rods 38 crossing them, which in turn are connected and held together by cross-connecting rods 39.
  • the distances between the push handle legs can be kept the same lengthways and crossways.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Wire Processing (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
EP85810587A 1984-12-12 1985-12-11 Système d'armature empêchant le cissaillement Expired - Lifetime EP0184995B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810587T ATE65817T1 (de) 1984-12-12 1985-12-11 Schubbewehrungssystem.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH591084 1984-12-12
CH5910/84 1984-12-12

Publications (3)

Publication Number Publication Date
EP0184995A2 true EP0184995A2 (fr) 1986-06-18
EP0184995A3 EP0184995A3 (en) 1988-08-31
EP0184995B1 EP0184995B1 (fr) 1991-07-31

Family

ID=4301373

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810587A Expired - Lifetime EP0184995B1 (fr) 1984-12-12 1985-12-11 Système d'armature empêchant le cissaillement

Country Status (3)

Country Link
EP (1) EP0184995B1 (fr)
AT (1) ATE65817T1 (fr)
DE (1) DE3583662D1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0414484A1 (fr) * 1989-08-21 1991-02-27 Square Grip Limited Armature pour chapiteau de colonne
GB2235226A (en) * 1989-08-21 1991-02-27 Square Grip Ltd Shearhead
EP0781891A1 (fr) * 1995-12-30 1997-07-02 Ancotech Ag Armature pour planchers à dalles supportés par des colonnes, élément d'armature de cisaillement ainse qu'un procédé pour la fabrication d'une armature
WO1997036067A1 (fr) * 1996-03-26 1997-10-02 Sicon S.R.O. Joint d'elements de construction en beton
GB2328455A (en) * 1996-08-21 1999-02-24 Jubin Motamed Concrete slab shear reinforcement
DE10312181A1 (de) 2003-03-19 2004-09-30 Spannverbund Gesellschaft für Verbundträger mbH Kombination aus einem Geilinger-Stahlpilz und einer Stahlbetondecke
WO2005003482A1 (fr) * 2003-07-01 2005-01-13 Onesteel Reinforcing Pty Ltd Element de renforcement
WO2011067027A1 (fr) * 2009-12-03 2011-06-09 Fischer Rista Ag Dispositif d'armature
ITMI20100357A1 (it) * 2010-03-05 2011-09-06 Pigazzi Reti S R L Elementi di armatura a punzonamento - taglio per piastre in cemento armato
WO2022058695A1 (fr) * 2020-09-21 2022-03-24 Ecole Nationale Des Ponts Et Chaussees Cage d'armature de renforcement d'une poutre en béton
CN116037461A (zh) * 2022-11-30 2023-05-02 安徽马钢矿业资源集团南山矿业有限公司 一种加强型振动筛筛梁

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH701682A1 (de) 2009-08-21 2011-02-28 Sybaco Ag Durchstanzbewehrung.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT331469B (de) * 1974-06-26 1976-08-25 Hofstadter Dipl Ing Erich Bewehrung
ATE62043T1 (de) * 1983-08-26 1991-04-15 Best Baueisen & Stahl Bewehrung fuer stahlbetonkonstruktionen.

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0414484A1 (fr) * 1989-08-21 1991-02-27 Square Grip Limited Armature pour chapiteau de colonne
GB2235226A (en) * 1989-08-21 1991-02-27 Square Grip Ltd Shearhead
EP0414485A3 (en) * 1989-08-21 1991-05-15 Square Grip Limited Shearhead reinforcement
GB2235226B (en) * 1989-08-21 1993-08-18 Square Grip Ltd Shearhead reinforcement
EP0781891A1 (fr) * 1995-12-30 1997-07-02 Ancotech Ag Armature pour planchers à dalles supportés par des colonnes, élément d'armature de cisaillement ainse qu'un procédé pour la fabrication d'une armature
WO1997036067A1 (fr) * 1996-03-26 1997-10-02 Sicon S.R.O. Joint d'elements de construction en beton
US6058669A (en) * 1996-03-26 2000-05-09 Sicon, S.R.O. Joint of concrete building elements
GB2328455A (en) * 1996-08-21 1999-02-24 Jubin Motamed Concrete slab shear reinforcement
DE10312181A1 (de) 2003-03-19 2004-09-30 Spannverbund Gesellschaft für Verbundträger mbH Kombination aus einem Geilinger-Stahlpilz und einer Stahlbetondecke
DE10312181B4 (de) 2003-03-19 2018-03-29 spannverbund GmbH Kombination aus einer Deckenstütze mit einem Stahlpilz und einer Stahlbetondecke
WO2005003482A1 (fr) * 2003-07-01 2005-01-13 Onesteel Reinforcing Pty Ltd Element de renforcement
WO2011067027A1 (fr) * 2009-12-03 2011-06-09 Fischer Rista Ag Dispositif d'armature
ITMI20100357A1 (it) * 2010-03-05 2011-09-06 Pigazzi Reti S R L Elementi di armatura a punzonamento - taglio per piastre in cemento armato
EP2363546A1 (fr) * 2010-03-05 2011-09-07 PIGAZZI RETI S.r.l. Eléments d'armature de cisaillement et de poinçonnement pour dalles en béton armé
WO2022058695A1 (fr) * 2020-09-21 2022-03-24 Ecole Nationale Des Ponts Et Chaussees Cage d'armature de renforcement d'une poutre en béton
FR3114330A1 (fr) * 2020-09-21 2022-03-25 Ecole Nationale Des Ponts Et Chaussees Cage d’armature de renforcement d’une poutre en béton
CN116037461A (zh) * 2022-11-30 2023-05-02 安徽马钢矿业资源集团南山矿业有限公司 一种加强型振动筛筛梁

Also Published As

Publication number Publication date
ATE65817T1 (de) 1991-08-15
EP0184995B1 (fr) 1991-07-31
DE3583662D1 (de) 1991-09-05
EP0184995A3 (en) 1988-08-31

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