EP3339528B1 - Raccordement béton-bois et dispositif de fixation - Google Patents

Raccordement béton-bois et dispositif de fixation Download PDF

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Publication number
EP3339528B1
EP3339528B1 EP17204554.4A EP17204554A EP3339528B1 EP 3339528 B1 EP3339528 B1 EP 3339528B1 EP 17204554 A EP17204554 A EP 17204554A EP 3339528 B1 EP3339528 B1 EP 3339528B1
Authority
EP
European Patent Office
Prior art keywords
screw
concrete
timber
bearing surface
wood
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
Application number
EP17204554.4A
Other languages
German (de)
English (en)
Other versions
EP3339528A1 (fr
Inventor
Antonio Tresoldi
Luca MARCHI
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.)
Fischerwerke GmbH and Co KG
Original Assignee
Fischerwerke GmbH and Co KG
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 Fischerwerke GmbH and Co KG filed Critical Fischerwerke GmbH and Co KG
Publication of EP3339528A1 publication Critical patent/EP3339528A1/fr
Application granted granted Critical
Publication of EP3339528B1 publication Critical patent/EP3339528B1/fr
Active 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
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/168—Spacers connecting parts for reinforcements and spacing the reinforcements from the form
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
    • 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
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B2005/232—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with special provisions for connecting wooden stiffening ribs or other wooden beam-like formations to the concrete slab
    • E04B2005/237—Separate connecting elements

Definitions

  • the invention relates to a wood-concrete connector with the features of the preamble of claim 1 and a fastening arrangement with such a wood-concrete connector.
  • a layer of concrete is often applied to an existing wooden ceiling.
  • the concrete layer can serve to improve the sound insulation, but in particular it strengthens the existing ceiling statically.
  • a static reinforcement In order for a static reinforcement to be achieved, however, it is necessary for a force transmission to take place parallel to the layers, i.e. a transmission of shear forces.
  • a wood-concrete connector is known, which is used to create a shear connection between a base made of wood and a layer of concrete attached thereto.
  • the wood-concrete connector consists of a sheet metal strip that is bent in such a way that it has a triangular cross-section.
  • a short side of the triangle is placed on the wood and a screw is screwed in a 45 degree wrap through one long side of the triangle and the opposite right angle into the wooden base.
  • the wood-concrete connectors are oriented in one direction on one half of the ceiling and in the opposite direction on the other half, so that the longitudinal axes of the screws point diagonally to the middle of the ceiling.
  • a metal grid is placed at a distance from the wooden base.
  • at least individual rods are attached to the wood-concrete connector, for example by welding. Concrete is then poured in such a way that both the wood-concrete connectors and the metal grid are completely surrounded by concrete. After curing, there is an effective bond between the concrete and the wooden substrate.
  • the wood-concrete connectors transfer shear forces and the metal grid acts as reinforcement within the concrete layer.
  • the object of the invention is to facilitate the production of such a wood-concrete composite.
  • the wood-concrete connector according to the invention has a body which has a contact surface for placing on a wooden base.
  • the body has a screw receptacle for a screw, with which the body can be screwed to the substrate.
  • a screw seat means a geometry that is suitable for receiving a screw in a predetermined orientation.
  • the geometry can be, for example, a cylindrical recess or two holes, with the geometry not having to be closed over the circumference.
  • the screw receptacle is designed in such a way that a screw is received by the body with its longitudinal screw axis at an angle of 20 to 80 degrees, in particular 30 to 60 degrees and preferably 40 to 50 degrees to the contact surface.
  • the screw with which the body is intended to be fastened to the wooden base, is screwed through the body into the wood at a defined angle.
  • the body also has a receiving device such that a rod of a metal grid can be received by the receiving device parallel to the contact surface.
  • the receiving device can comprise a snap-in device and/or a locking device, by means of which the rod is held in a form-fitting manner.
  • the receiving device serves to place the metal grid, ie a rod of the metal grid lies so far into the receiving device that it is held in a centering manner and is essentially secured against displacement.
  • the receiving device is groove-shaped.
  • a groove makes it possible for the rod of the metal grid to be received very easily.
  • the metal grid can first be placed roughly in such a way that the metal rod rests somewhere on the body, in order to then merely move the metal grid until the metal rod slips into the groove-shaped receiving device.
  • the groove-shaped receiving device can be so narrow that the rod lies in place with only a small part of its cross section, as if in a notch, or so wide that the cross section of the rod is completely received.
  • the body is designed and assembled in such a way that the direction of thrust, in which the screws are aligned, corresponds to the direction of the rod received by the receiving means.
  • the invention therefore proposes that the screw defines an imaginary shear plane in which the longitudinal axis of the screw lies, with the shear plane being perpendicular to the contact surface.
  • the receiving device is formed by a recess with a direction of longitudinal extension. This direction of longitudinal extent is essentially parallel to the contact surface and essentially parallel to the shear plane. The direction of longitudinal extension can in particular lie in the shear plane. If the wood-concrete connector has two screw mounts, which is preferred, then the mount is in particular in the middle between the two screw mounts.
  • the body also has a pointed projection projecting away from the abutment.
  • This projection serves to pre-fix the body like a nail in the wooden base before the body is fastened with the screw.
  • the contact surface is therefore only actually on the wooden base when the projection is driven into the wood.
  • several wood-concrete connectors can first be aligned along a line and pre-fixed with a hammer using the projections in such a way that they can no longer slip.
  • the pointed projection can contribute as much as possible to the transmission of shear forces to the wooden base, it has in particular an essentially triangular cross section, one side of which runs essentially perpendicular to the contact surface and the other side essentially parallel to the longitudinal axis of the screw.
  • the body has an impact surface, which is essentially parallel to the contact surface, for absorbing blows from a hammer.
  • a striking surface makes it clear to the user that a hammer can be used. But it also makes it clear where to hit.
  • the body can be designed in such a way that the forces generated by the punches are well distributed in the body. Also essential for the design of the geometry are the forces that are generated in the finished bond between the concrete and the wooden substructure via the body and the screw are transferred.
  • the body is preferably designed in such a way that little material is required for production and, on the other hand, there is effective resistance to the forces mentioned.
  • the body preferably has an undercut on an outside, as seen from a side facing away from the contact surface. This ensures that the concrete is secured against lifting perpendicular to the contact surface by means of a form fit on the body, as can occur in the case of complex stress conditions in a ceiling made of a wood-concrete composite.
  • the fastening arrangement according to the invention has a wood-concrete connector, as described above, and at least one screw, with which the wood-concrete connector is screwed to a wooden base.
  • a metal grid lies in the receiving device and the wood-concrete connector is arranged in a layer of concrete.
  • the wood-concrete connector 1 shown in the figures has a body 2 made of plastic. How from the Figures 1 and 2 it becomes clear that the body 2 has a rectangular bearing surface 4 on an underside 3 .
  • a top 5 forms a face 6, which is somewhat narrower, but longer than the contact surface 4, this face 6 is not continuous.
  • the impact surface 6 is interrupted in the middle transversely to its longitudinal extent by a groove-shaped recess 7, which forms a receiving device 8 for a rod 9 of a metal grid 10, whereupon in the course of description to figure 3 will be dealt with further.
  • two pockets 11 are arranged on the right and left of the recess 7, but these only serve to save material.
  • a front side 12 slopes downwards from the striking surface 6 towards the contact surface 4 , so that the front side 12 is at a 45-degree angle to the contact surface 4 .
  • a rear side 13 falls away from the striking surface 6, first perpendicularly to the striking surface 6 and then from about halfway up, slightly inclined toward the front side 12.
  • this inclined part of the rear side 13 cannot be seen and forms a first undercut 14.
  • a screw receptacle 15 in the form of a cylindrical hole 16 with a conical mouth 17 extends from the front side 12 to the right and left of the recess 7 to the contact surface 4.
  • the longitudinal extension of the screw receptacle 15 is perpendicular to the front side 12 and thus at a 45-degree angle. Angle to the contact surface 4 arranged.
  • the screw longitudinal axis S of a screw 18 inserted into the screw receptacle 15, as is only shown in figure 3 is shown is thus recorded at an angle of 45 degrees to the contact surface 4.
  • the projections 19 protrude from the contact surface 4, of which figure 1 however, one is hidden.
  • the projections 19 each have a triangular cross section in two mutually perpendicular planes.
  • a rear side 20 of the projection 18 runs perpendicularly to the contact surface 4 and a front side 21 parallel to the longitudinal axis S of the screw.
  • FIG 3 shows the use of the wood-concrete connector 1 in a fastening arrangement 22 according to the invention.
  • Several wood-concrete connectors 1 are arranged in a row on a base 23 made of wood.
  • the wood-concrete connectors 1 are first placed and aligned along a line (not shown) in such a way that a longitudinal extension direction A of the receiving devices 8 of the body 2 is parallel to this line.
  • the direction of longitudinal extent A is arranged parallel to a shear plane ES, which is arranged perpendicularly to the contact surface 4 and is defined by the longitudinal axis S of the screw.
  • ES shear plane
  • the shear plane ES agrees with the cutting plane of figure 2 match.
  • the Body 2 driven with the projections 19 ahead in the ground 23 until the contact surface 4 rests.
  • screws 18 are screwed through the screw receptacles 15 into the base 23 until heads 24 of the screws 18 come to rest in the mouth 17 .
  • the bodies 2 cannot slip, since the projections 19 secure them against slipping.
  • a roughly positioned metal grid 10 is placed on the bodies 2 , with the metal grid 10 not having to rest on all the bodies 2 .
  • the metal grid 10 consists of a large number of bars 9 which are arranged parallel and perpendicular to one another.
  • the metal grid 10 is then slightly shifted until at least one rod 9 slides into the receiving device 8 of the body 2 and is thus received by the body 2 .
  • the rod 9 is not completely in the receiving device 8, but protrudes similar to a notch only partially.
  • a layer of concrete 25 is applied by pouring in such a way that finally both the wood-concrete connectors 1 and the metal grid 10 are completely enclosed. Forces acting parallel to the contact surface 4 can be transmitted from the layer of concrete 25 to the wood-concrete connector 1 in particular via the rear sides 13 of the body 2 .
  • the first undercut 14 also prevents the layer of concrete 25 from lifting off the substrate 23.
  • Further undercuts 26, which are each arranged opposite one another on end faces 27 of the body 2 (see also figure 1 ) also contribute to this.
  • the front sides 27 and the rear side 13 form outer sides 28 with undercuts 14, 26.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)

Claims (5)

  1. Elément (1) de liaison bois-béton, comportant un corps (2) muni d'une surface de contact (4) dévolue à la mise en place sur une structure sous-jacente (23) en bois, et d'un logement (15) de vis conçu de telle sorte qu'une vis (18) dudit élément de liaison (1), par laquelle le corps (2) peut être assujetti par vissage à la structure sous-jacente (23), soit reçue par ledit corps (2) en décrivant, par son axe longitudinal (S), un angle de 20 à 80 degrés, notamment de 30 à 60 degrés, et préférentiellement de 40 à 50 degrés par rapport à la surface de contact (4), lequel corps (2) est doté d'un dispositif de réception (8), de façon telle qu'une baguette (9) d'un treillis métallique (10) puisse être reçue par ledit dispositif de réception (8), parallèlement à ladite surface de contact (4), lequel dispositif de réception (8) revêt la forme d'une rainure, sachant qu'à l'état monté de l'élément de liaison (1), dans lequel le corps est assujetti par vissage à la structure sous-jacente à l'aide de la vis, ladite vis (18) définit un plan virtuel de poussée (ES) dans lequel se trouve l'axe longitudinal (S) de ladite vis, ledit plan de poussée (ES) se dressant perpendiculairement à la surface de contact (4), et de façon telle que ledit dispositif de réception (8) soit formé par un évidement (7) dont la direction (A) de l'étendue longitudinale est, pour l'essentiel, parallèle à ladite surface de contact (4) et substantiellement parallèle audit plan de poussée (ES), caractérisé par le fait que la baguette (9) du treillis métallique (10) est intégrée, dans le dispositif de réception (8), d'une ampleur telle qu'elle soit retenue avec effet de centrage et soit, pour l'essentiel, arrêtée à l'encontre d'un déplacement.
  2. Elément de liaison bois-béton selon la revendication 1, caractérisé par le fait qu'une saillie pointue (19) dépasse au-delà de la surface de contact (4).
  3. Elément de liaison bois-béton selon la revendication 1 ou 2, caractérisé par le fait que le corps (2) est pourvu d'une surface de percussion (6) substantiellement parallèle à la surface de contact (4), conçue pour recevoir des coups de marteau.
  4. Elément de liaison bois-béton selon l'une des revendications précédentes, caractérisé par le fait que le corps (2) est muni d'une contre-dépouille (14, 26), sur une face extérieure (28), en observant à partir d'un côté pointant à l'opposé de la surface de contact (4).
  5. Agencement de fixation (22) équipé d'un élément (1) de liaison bois-béton conforme à l'une des revendications précédentes, caractérisé par le fait que l'élément (1) de liaison bois-béton est vissé à une structure sous-jacente (23) en bois, à l'aide d'une vis (18), un treillis métallique (10) est intégré dans le dispositif de réception (8), et ledit élément (1) de liaison bois-béton est logé dans une couche de béton (25).
EP17204554.4A 2016-12-20 2017-11-30 Raccordement béton-bois et dispositif de fixation Active EP3339528B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016125008.2A DE102016125008A1 (de) 2016-12-20 2016-12-20 Holz-Beton-Verbinder und Befestigungsanordnung

Publications (2)

Publication Number Publication Date
EP3339528A1 EP3339528A1 (fr) 2018-06-27
EP3339528B1 true EP3339528B1 (fr) 2022-03-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17204554.4A Active EP3339528B1 (fr) 2016-12-20 2017-11-30 Raccordement béton-bois et dispositif de fixation

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EP (1) EP3339528B1 (fr)
DE (1) DE102016125008A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4339387A1 (fr) * 2022-09-16 2024-03-20 Hans-Ulrich Terkl Logement de vis et procédé de fixation amovible d'un élément en béton sur une structure de support

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1123107A (en) * 1914-02-04 1914-12-29 Frank J Darr Reinforcing-bar support.

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2698652B1 (fr) * 1992-12-01 1995-03-17 Michel Barra Procédé et dispositifs de renforcement de planchers bois.
FR2727993A1 (fr) * 1994-12-13 1996-06-14 Soprese Structure mixte bois-beton destinee notamment a la realisation de tabliers d'ouvrages d'art
DE19522280A1 (de) * 1995-06-20 1997-01-02 Kunz Gmbh & Co Einrichtung zur Festlegung von Bewehrungen
DE19602400A1 (de) * 1996-01-24 1997-07-31 Heinz Wieland Holz/Beton-Verbund
US6363679B1 (en) * 1999-06-11 2002-04-02 Flannery, Inc. Fastening device
DE10039264A1 (de) * 2000-08-11 2002-02-28 Ricky Selle Verbindungsmittel zur Schubkraftübertragung in Holz - Verbund - Biegeträgern
CH695620A5 (it) * 2001-08-07 2006-07-14 Full Restore Ltd Elemento per il fissaggio di un getto di calcestruzzo su strutture metalliche o lignee.
DE202007000776U1 (de) * 2006-09-04 2007-05-31 Com-Ing Ag Montagelehre, Einlegeelement zur Erzeugung von Schraubenkanälen in einem flächigen Betonelement, Holz/Beton-Verbundelement und Holz/Beton-Verbundtragwerk
DE102009008720A1 (de) * 2009-02-06 2010-08-12 Swg Schraubenwerk Gaisbach Gmbh Verbindungselement
DE102009013146A1 (de) * 2009-03-05 2010-09-09 Swg Schraubenwerk Gaisbach Gmbh Beschlagelement
ITRM20130722A1 (it) 2013-12-24 2015-06-25 Mario Martina Connettore antiscorrimento secondo le sollecitazioni prevalenti a trazione e compressione

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1123107A (en) * 1914-02-04 1914-12-29 Frank J Darr Reinforcing-bar support.

Also Published As

Publication number Publication date
DE102016125008A1 (de) 2018-06-21
EP3339528A1 (fr) 2018-06-27

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