EP2851479B1 - Système de renforcement contre le poinconnement avec des tiges transversales ayant des têtes d'ancrage - Google Patents
Système de renforcement contre le poinconnement avec des tiges transversales ayant des têtes d'ancrage Download PDFInfo
- Publication number
- EP2851479B1 EP2851479B1 EP14000488.8A EP14000488A EP2851479B1 EP 2851479 B1 EP2851479 B1 EP 2851479B1 EP 14000488 A EP14000488 A EP 14000488A EP 2851479 B1 EP2851479 B1 EP 2851479B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rods
- curved
- slab
- reinforcement
- studs
- 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.)
- Active
Links
- 238000004873 anchoring Methods 0.000 title claims description 14
- 230000002787 reinforcement Effects 0.000 title description 24
- 239000004567 concrete Substances 0.000 claims description 11
- 239000000203 mixtures Substances 0.000 claims description 5
- 230000003014 reinforcing Effects 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 2
- 230000000875 corresponding Effects 0.000 claims 2
- 210000001699 lower leg Anatomy 0.000 claims 1
- 230000002093 peripheral Effects 0.000 claims 1
- 238000004080 punching Methods 0.000 description 13
- 238000005452 bending Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002184 metals Substances 0.000 description 2
- 230000003068 static Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000835 fibers Substances 0.000 description 1
- 238000005755 formation reactions Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 materials Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reactions Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/43—Floor structures of extraordinary design; Features relating to the elastic stability; Floor structures specially designed for resting on columns only, e.g. mushroom floors
-
- 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
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0645—Shear reinforcements, e.g. shearheads for floor slabs
Description
- Les zones d'appui des dalles en béton armé et/ou précontraint sont soumises à des efforts de flexion et de cisaillement très importants. Elles sont ainsi souvent déterminantes pour la résistance et la capacité de déformation de la structure [1].The support zones of the reinforced and / or prestressed concrete slabs are subjected to very high bending and shearing forces. They are thus often determining for the resistance and the capacity of deformation of the structure [1].
- Des défaillances dans les zones d'appui ont normalement lieu par poinçonnement du béton [1], c'est-à-dire, par la formation d'une fissure conique provoquant la pénétration de la surface d'appui dans la dalle (voir
figure 1 ). Afin d'augmenter la résistance et la capacité de déformation de ces régions, différentes solutions ont été appliquées dans le passé :
- 1. Modifier les dimensions de la surface d'appui et/ou les armatures flexionnelles de la dalle.
- 2. Disposer une tête métallique permettant d'élargir la surface d'appui de la dalle (solution souvent adoptée pour de sollicitations très importantes).
- 3. Plier les barres d'armature de flexion pour leur permettre de reprendre l'effort tranchant. Cette solution a été pratiquement abandonnée depuis les années 60's mais elle est encore présente dans quelques systèmes spéciales d'armature, plutôt pour l'amélioration de la capacité de déformation des dalles en béton.
- 4. Ajouter des armatures transversales (de dimensions et propriétés comparables à l'armature à la flexion de la dalle) façonnées spécifiquement afin d'empêcher à la fissure conique de poinçonnement de s'ouvrir sans contrôle.
- 5. Disposer de fibres dans le béton (éléments linéaires en acier ou plastique de faible diamètre et longueur et orientées de façon aléatoire).
- 1. Modify the dimensions of the support surface and / or the flexural reinforcement of the slab.
- 2. Arrange a metal head to widen the support surface of the slab (solution often adopted for very important solicitations).
- 3. Bend rebar flexion to allow them to regain shear strength. This solution has been practically abandoned since the 1960's, but it is still present in some special reinforcement systems, rather for improving the deformation capacity of concrete slabs.
- 4. Add transverse reinforcement (of similar dimensions and properties to the slab reinforcement) specifically shaped to prevent the conical punching crack from opening unchecked.
- 5. Place fibers in the concrete (linear steel or plastic elements of small diameter and length and oriented randomly).
- Des étriers (barres d'armatures ordinaires) façonnés de façon a faciliter la pose de l'armature de flexion (
figure 2a ) - Paniers d'armatures, avec plusieurs brins d'armature ancrées par adhérence (
figure 2b ) - Barres d'armatures droites avec tête d'ancrage, disposées en vertical ou inclinées (une ou plusieurs barres de montage pouvant être présent dans un côté afin de faciliter la pose des éléments,
figure 2c,d ) - Barres d'armatures droites avec tête d'ancrage d'un côté et soudés sur un rail de l'autre (
figure 2e )
- Stirrups (ordinary reinforcing bars) shaped to facilitate the installation of the bending reinforcement (
figure 2a ) - Reinforced baskets, with several reinforcement strands anchored by adhesion (
figure 2b ) - Straight rebar with anchoring head, arranged vertically or inclined (one or more mounting bars may be present in one side to facilitate installation of the elements,
Figure 2c, d ) - Straight rebars with anchor heads on one side and welded to one rail on the other (
figure 2e )
- D'accroitre les performances statiques par rapport à des armatures avec têtes d'ancrage verticales (voir
figure 3 ). Ceci est justifié par la présence des éléments courbes inclinés dans la zone où ils sont interceptés par la fissure de poinçonnement - De profiter des avantages de pose de tiges verticales pour les zones avec armature flexionelle non parallèle aux tiges ou loin de la zone de rupture (voir
figure 5 )
- To increase the static performances compared to reinforcements with vertical anchoring heads (see
figure 3 ). This is justified by the presence of inclined curved elements in the area where they are intercepted by the punching crack - Take advantage of the advantages of vertical rods for zones with non-parallel flexionelle reinforcement to the stems or far from the rupture zone (see
figure 5 )
- [1] Muttoni, A. Punching shear strength of reinforced concrete slabs without transverse reinforcement, ACI Structural Journal, Farmington Hills, Mich., Vol. 105, No. 4, 2008, pp. 440-450 [1] Muttoni, A. Punching Shear Strength of Reinforced Concrete Slabs Without Transverse Reinforcement, ACI Structural Journal, Farmington Hills, Mich., Vol. 105, No. 4, 2008, pp. 440-450
- [2] Fernández Ruiz, M., Muttoni, A. Punching shear strength of reinforced concrete slabs with transverse reinforcement, ACI Structural Journal, Farmington Hills, Mich., Vol. 106, No. 4, 2009, pp. 485-494 [2] Fernández Ruiz, M., Muttoni, A. Punching Shear Strength of Reinforced Concrete Slabs with Transverse Reinforcement, ACI Structural Journal, Farmington Hills, Mich., Vol. 106, No. 4, 2009, pp. 485-494
- [3] Fernández Ruiz, M., Muttoni, A., Performance and design of punching shear reinforcing systems, 3rd International fib congress, Washington, USA, 2010, 15 p.[3] Fernández Ruiz, M., Muttoni, A., Performance and Design of Punching Shear Reinforcing Systems, 3rd International Fib Congress, Washington, USA, 2010, 15 p .
- AAT
- ETAT DE L'ARTSTATE OF THE ART
- Figure 1:Figure 1:
- Fissure de poinçonnement se développant dans une zone d'appui d'une dalle sans armature transversale.Punching crack developing in a bearing zone of a slab without transverse reinforcement.
- Figure 2:Figure 2:
- Exemples de systèmes d'armature de poinçonnement existants: (a) étriers; (b) cages d'étriers; (c) goujons verticaux; (d) goujons inclinés ; (e) goujons soudés sur un rail ; et (f) armature collée.Examples of existing punching armature systems: (a) stirrups; (b) stirrup cages; (c) vertical studs; (d) inclined studs; (e) studs welded to a rail; and (f) glued reinforcement.
- Figure 3:Figure 3:
- Performance de systèmes d'armatures contre le poinçonnement en fonction de leur ancrage et type d'armature (adapté de [3]).Performance of reinforcement systems against punching according to their anchorage and type of reinforcement (adapted from [3]).
- BB
- INVENTIONINVENTION
- Figure 4:Figure 4:
- Section transversale d'une dalle renforcée avec l'invention proposée : plusieurs goujons courbes sont disposés à proximité de la colonne (zone de sollicitations maximales) tandis que de goujons droites sont disposés dans les régions moins sollicitées.Cross section of a reinforced slab with the proposed invention: several curved studs are arranged near the column (maximum stress zone) while straight studs are arranged in less stressed regions.
- Figure 5:Figure 5:
- Vue en plan de la disposition des pièces et de l'armature de flexion de la dalle.Plan view of the layout of the pieces and the bending reinforcement of the slab.
- Figure 6A:Figure 6A:
- Ancre avec 2 pliages dans deux directions opposées en forme de «S».Anchor with 2 folds in two opposite directions in the shape of "S".
- Figure 6B:Figure 6B:
- Ancre avec une succession de pliages ponctuels et une partie droite entre les pliages ou ancres avec deux ou plusieurs pliages ponctuels et une partie droite entre les pliages.Anchor with a succession of punctual folds and a straight part between the folds or anchors with two or more punctual folds and a straight part between the bends.
- Figure 7A:Figure 7A:
- Ancre avec pieds agrandi par une augmentation de volume.Anchor with feet enlarged by an increase in volume.
- Figure 7B:Figure 7B:
- Ancre avec au minimum une tête non perpendiculaire à la tige.Anchor with at least one head not perpendicular to the stem.
- Figure 7C:Figure 7C:
- Ancre avec une tête agrandie pour améliorer l'introduction des efforts dans le béton.Anchor with an enlarged head to improve the introduction of efforts into the concrete.
Claims (12)
- Système de renforcement contre le poinçonnement d'une dalle en béton comprenant des tiges, qui s'étendent, lorsque le système est installé dans la dalle, transversalement par rapport à la dalle, lesdites tiges sont composées d'une barre avec une tête d'ancrage transversales à chaque extrémité de ladite barre, lesdites têtes d'ancrage ayant un diamètre plus large que le diamètre de la barre, lesdites tiges ayant, lorsque le système est installé dans la dalle, une tête d'ancrage située à proximité de la surface supèrieure de la dalle et une tête d'ancrage située à proximité de la surface inférieure de la dalle, caractérisé en ce que la barre desdites tiges est courbée entre lesdites têtes d'ancrage.
- Système selon revendication 1, caractérisée en ce que les barres courbées ont au moins une région droite.
- Système selon revendication 1 ou 2, caractérisée en ce que les barres courbées ont au moins une région verticale en relation de la dalle en béton.
- Système selon un des revendications 1 à 3, caractérisée en ce que les barres courbées ont au moins deux pliages dans directions égales ou différentes.
- Système selon un des revendications 1 à 4, caractérisée en ce que les barres courbées composent conjointes une forme a voute.
- Système selon un des revendications 1 à 5, caractérisée en ce que au moins un des tètes ancrage est positionnée à angle non-droit en relation d'extrémité corrélative du barre courbées.
- Système selon un des revendications 1 à 6, caractérisée en ce que au moins un des tètes ancrage est positionnée à angle droit en relation d'extrémité corrélative des barres courbées.
- Système selon un des revendications 1 à 7, caractérisée en ce que les barres courbées ont pour tète ancrage inferieure un pied agrandi en relation du chevet d'ancrage.
- Système selon un des revendications 1 à 8, caractérisée en ce que les barres courbées ont pour leur extrémité inferieure une zone agrandie en relation du reste des barres courbées ou droites.
- Système selon un des revendications 1 à 9, caractérisée en ce qu'il contient une combinaison des tiges avec des barres courbées et des tiges avec des barres droites.
- Système selon revendication 10, caractérisée en ce que les tiges avec des barres courbées sont disposées a proximité de la région d'appui tandis que les tiges avec des barres droites sont disposées dans de région plus éloignées.
- Système selon un des revendications 1 a 11, caractérisée en ce que les barres courbées ou droites sont inclinées dans la zone d'une dalle en béton ou ils sont interceptes far des fissure de poinçonnement éventuelles.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00566/13A CH707571A1 (fr) | 2013-02-12 | 2013-02-12 | Système de renforcement contre le poinçonnement avec des tiges ou des barres transversales ayant des têtes d'ancrage. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2851479A2 EP2851479A2 (fr) | 2015-03-25 |
EP2851479A3 EP2851479A3 (fr) | 2015-06-03 |
EP2851479B1 true EP2851479B1 (fr) | 2017-06-14 |
Family
ID=51301029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14000488.8A Active EP2851479B1 (fr) | 2013-02-12 | 2014-02-12 | Système de renforcement contre le poinconnement avec des tiges transversales ayant des têtes d'ancrage |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2851479B1 (fr) |
CH (1) | CH707571A1 (fr) |
DK (1) | DK2851479T3 (fr) |
ES (1) | ES2640338T3 (fr) |
PT (1) | PT2851479T (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK3070225T3 (da) | 2015-03-17 | 2020-03-02 | Halfen Gmbh | Gennemstansningsarmeringselement og konstruktion med en plade med et gennemstansningsarmeringselement |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2930221A (en) * | 1951-10-20 | 1960-03-29 | Lally Column Co | Head plate for structural columns |
DE29820985U1 (de) * | 1998-10-07 | 1999-01-28 | Frisch Hans | Schubbewehrungselement zur Schubbewehrung von Stahlbetonplatten und Stahlbetonplatte |
JP2005133360A (ja) * | 2003-10-29 | 2005-05-26 | Hitachi Plant Eng & Constr Co Ltd | ジベル後入れ型埋込金物 |
DE102004040584A1 (de) * | 2004-08-21 | 2006-02-23 | Schöck Bauteile GmbH | Bauelement zur Schubbewehrung |
EP1754843A1 (fr) * | 2005-08-18 | 2007-02-21 | SCHÖCK BAUTEILE GmbH | Élément de construction pour armature de cisaillement |
EP2239391A1 (fr) * | 2009-04-06 | 2010-10-13 | Ecole Polytechnique Fédérale de Lausanne | Élément de renforcement pour construction en béton |
US8220219B2 (en) * | 2010-12-03 | 2012-07-17 | Martter Richard P | Reinforcing assembly, and reinforced concrete structures using such assembly |
-
2013
- 2013-02-12 CH CH00566/13A patent/CH707571A1/fr not_active Application Discontinuation
-
2014
- 2014-02-12 DK DK14000488.8T patent/DK2851479T3/en active
- 2014-02-12 EP EP14000488.8A patent/EP2851479B1/fr active Active
- 2014-02-12 PT PT140004888T patent/PT2851479T/pt unknown
- 2014-02-12 ES ES14000488.8T patent/ES2640338T3/es active Active
Also Published As
Publication number | Publication date |
---|---|
DK2851479T3 (en) | 2017-09-11 |
EP2851479A3 (fr) | 2015-06-03 |
EP2851479A2 (fr) | 2015-03-25 |
PT2851479T (pt) | 2017-08-31 |
ES2640338T3 (es) | 2017-11-02 |
CH707571A1 (fr) | 2014-08-15 |
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