EP3211151A1 - Support de bois en forme de jonction de lamelles - Google Patents

Support de bois en forme de jonction de lamelles Download PDF

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Publication number
EP3211151A1
EP3211151A1 EP16157661.6A EP16157661A EP3211151A1 EP 3211151 A1 EP3211151 A1 EP 3211151A1 EP 16157661 A EP16157661 A EP 16157661A EP 3211151 A1 EP3211151 A1 EP 3211151A1
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EP
European Patent Office
Prior art keywords
lamella
wood
lamellae
type
modulus
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.)
Withdrawn
Application number
EP16157661.6A
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German (de)
English (en)
Inventor
Mathias Hofmann
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.)
Hess Timber & Co KG GmbH
Original Assignee
Hess Timber & Co KG GmbH
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 Hess Timber & Co KG GmbH filed Critical Hess Timber & Co KG GmbH
Priority to EP16157661.6A priority Critical patent/EP3211151A1/fr
Publication of EP3211151A1 publication Critical patent/EP3211151A1/fr
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E04C3/122—Laminated

Definitions

  • the invention relates to a timber carrier according to the preamble of claim 1.
  • Such carriers must be designed to accommodate the corresponding loads in appropriate massiveness. This not only leads to a cost increase but also to an increase in weight, whereby the forces to be absorbed via the supporting structure in turn are relatively reduced.
  • a lattice girder for a framework likewise likewise comprises, as is known, a top chord and a lower chord disposed at a greater distance therefrom, which are generally arranged running parallel to one another. Between the upper and the lower belt are then offset in the longitudinal direction of the carrier offset from each other and arranged diagonally aligned struts, which act and serve depending on the force stress as compression struts or tension struts. It can be distinguished between an overstretched and under-stressed support structure.
  • constructions have also become known in timber construction, for example using glued laminated timber (BSH).
  • BSH glued laminated timber
  • a method for producing a longitudinal connection of timber components and a corresponding wooden component is, for example, from EP 2 227 605 B1 known.
  • the wooden support known therefrom comprises a support web extending in the longitudinal direction of the wood support, in which recesses are incorporated. These recesses extend only over a partial height of the support web.
  • the wood carrier itself can be made of veneer wood panels (FSH), which comparatively are inexpensive to produce.
  • FSH veneer wood panels
  • the provided in the prior art upper belt covering the recesses introduced in the carrier may for example consist of glulam (BSH) or veneer lumber (FSH) or include these materials. For this purpose, conifers as well as hardwoods can be used.
  • Object of the present invention is based on the generic state of the art to provide an improved wooden beams, which can accommodate the highest possible loads and also has advantages over previous solutions in so far as that the wood support according to the invention can not suddenly fail by at Overload of the carrier suddenly breaks without notice.
  • the wooden support according to the invention consists of a lamellar binder which on the one hand has a high degree of robustness and on the other hand is characterized by its ductile carrying behavior.
  • a breakage of the timber girder does not occur. If the timber carrier could no longer take up the load, it is unpredictable and spontaneously the wearer suddenly broke, ie in its entire cross-section, so that its supporting function so suddenly eliminated.
  • the wood support according to the invention in the form of a lamella binder has the significant advantage that a sudden failure of the lamellar binder is avoided.
  • a fracture of the lamellar binder due to excessive loads or overloads would initially announce only by a partial failure of individual lamellae. This breach announcement is audible and clearly visible.
  • the lamellar binder is not yet broken with respect to remaining lamellae or layers of wood.
  • the wooden support according to the invention has at least three lamellae, layers or layers, the two outer layers, layers or lamellae, for example, consist of glued laminated timber (BSH) and in between a middle lamella, layer or layer is glued, which consists for example of laminated veneer lumber (LVL).
  • BSH laminated laminated timber
  • LDL laminated veneer lumber
  • the at least three lamellae, layers or layers comprising wood beams two outer slats, layers or Layers, for example, made of laminated veneer lumber (LVL) are formed, and that in between a middle layer is glued, which consists for example of glued laminated timber (BSH).
  • the modulus of elasticity of the lamellae preferably made of laminated veneer lumber (LVL or FSH) has a value which is equal to or greater than the value of the modulus of elasticity of the lamella, preferably consisting of glulam (BSH), Layer or layer. It is preferably sufficient if the modulus of this BSH slat, for example, max. 50% above the modulus of elasticity of the glued laminated timber lamella.
  • the lamellae which are preferably made of glued laminated timber or of laminated veneer lumber, have different strengths.
  • the strength is known to be defined by the voltage to be absorbed (whose unit is measured N / mm 2 ).
  • the strength of preferably veneer lumber ( LVL) existing lamellae on the strength of preferably made of glulam (BSH) lamellae is provided.
  • the strength of the respective example of veneer lumber (LVL) existing lamella should be at least a factor of 1.4, and preferably 1.5 ... 2.0. It is in the Usually sufficient, if the strength preferably of the laminated veneer lamella is not more than four times as large as the strength of the glued laminated timber used to a slat connector preferably used.
  • the inventive solution with the explained different modulus of elasticity and / or the different strengths of the slats ensures that it can only come to a failure of individual slats in a multi-lamella wood support, in particular to a failure of the individual slats in the form of glued laminated timber , this failure taking place beginning from the Switzerlandzonenrand upwards. Even if such a slat, for example consisting of laminated timber, breaks, the remaining slats and in particular the remaining one or more veneer plywood slats can still take up the necessary carrying forces.
  • the lamella composite according to the invention consists at least predominantly of wood, wood components and / or wood-based materials or at least predominantly comprises wood, wood components and / or wood-based materials.
  • the preferred advantages according to the invention can be realized if the described laminated composite consists of at least 70%, preferably at least 80%, 90%, or at least 95% of wood, wood components and / or wood-based materials or at least 70%, 80%. , 90% or at least 95% wood, wood components and / or wood-based materials.
  • the remaining portion may be supplemented by other materials and materials having the desired characteristics as explained above.
  • the percentages given above mean percentages by volume and / or percentages by weight. In this case, these percentages relate to the respective total lamellar connectors and preferably to the individual lamella types.
  • FIG. 1 is shown in a schematic side view and in Figure 2 in a schematic plan view of a wooden support 1, which is formed in the invention in the manner of a lamellar binder 3.
  • FIG. 3a is a cross section along the line III - III through FIG. 1 played.
  • the wooden beam in the manner of a lamellar binder thus comprises in the embodiment shown three standing slats L, namely a first central or central slat L1, sandwiched between two outer Slats L2 is included. All three blades are connected to each other non-positively, in particular glued.
  • the lamellar binder according to FIGS. 1, 2 or 3a has, for example, a length X, a height H and a width or thickness B, as shown Figures 1 and 2 can be seen.
  • a veneer lumber wood is therefore a wood material, as it is often used in timber construction.
  • veneer plywood usually consists of about 3 mm thick peeled veneers. This softwood is often used. Also in use are also the most diverse hardwoods. This veneer plywood can then be used for surface structures as well as for solid wood beams in the form of beams, etc.
  • veneer lumbers these are preferably glued together in a parallel fiber shape so that material properties such as strength values are strong are directional. You can - as will be discussed below - but also in layers, for example, glued to each other by 90 ° or in another angular position. This results in different or constant strength values in different directions.
  • middle slat L L1 is formed in contrast to the outer slats L2 not from veneer lumber but from glued laminated timber, which is also abbreviated hereafter BSH.
  • Glued laminated timber is understood as meaning glued woods, which as a rule comprise at least four board layers and are preferably glued together in the same fiber direction. These glulam beams are also often used in engineering timber construction to absorb high static forces here.
  • the middle slat L1 can be composed of several board layers or board layers 11.
  • 8 board timbers are glued together, each with their large side surface.
  • the peculiarity of this invention timber carrier or lamellar binder is now characterized by the fact that the lamellae L, L1, L2 formed from different woods and / or produced using different woods at least have an approximately equal or not too different from each other modulus E.
  • the laminated wood-lamella L1 is optimized with respect to its load-bearing behavior by the veneer lumber slats L2.
  • the modulus of elasticity of existing veneer plywood or veneer plywood lamella L, L2 has an E-module, which corresponds to the modulus of elasticity of this embodiment, the average glulam lamella L, L1 or greater.
  • the modulus of elasticity of laminated glued laminated lath L1 is only 50% higher than the modulus of elasticity of laminated veneer lamellae L2.
  • the modulus of elasticity of the laminated timber slat L1 or the corresponding slat L1 is generally only about 45%, preferably only at most 40%, 35%, 30%, 25%, 20%, 15%, 10% and preferably only by 5% above the modulus of elasticity of the further lamella L2, ie preferably the laminated veneer lamella L2.
  • the strength is defined as the voltage to be absorbed in N / mm 2 .
  • the strength of the laminated veneer lamella L2 is greater than the strength of the laminated timber lamella L1.
  • the factor F by which the strength of the laminated veneer lamella L2 is greater than the strength of the laminated lamella L1 should preferably be at least 1.4, preferably at least 1.5, 1.6, 1.7, 1.8, 1.9 or at least 2.0. In the same way, however, this value can also be significantly higher, such that the aforementioned factor F is, for example, at least 2.1, 2.2, 2.3... 3.8, 3.9 and preferably at least 4.0.
  • the factor by which the strength of the lamella L2 consisting of laminated veneer lumber LVL is not greater than 4, preferably less than 3.9, 3.8, 3, compared with the lamination L1 consisting of glulam BSH . 7, 3.6, 3.5, 3.4, 3.3, 3.2, 3.1, 3.0 .
  • the lamellar binder according to the invention shows a behavior in which announces a possible breakage by a partial failure of a lamination L1 formed from glulam BSH. This partial failure is easily audible by a loud bang and visually also clearly visible. Nevertheless, the lamellar binder still carries, so that appropriate security measures can be initiated quickly.
  • This support or fracture behavior according to the invention arises because laminations are glued together with the same or with a similar modulus of elasticity.
  • This modulus of elasticity ultimately means that the individual lamellae have a similar expansion behavior and oppose a more or less equal resistance to elastic deformation.
  • the vote is such that the modulus of the slats L2, which are made of laminated veneer lumber LVL, is equal to or greater than the modulus of elasticity of laminated glulam BSH comprehensive lamellae, so that targeted - in a breakage trap - initially the glued laminated timber BSH comprehensive Slat breaks.
  • the strength of the laminations L2 comprising the laminated veneer lumber materials is preferably 1.4 to 4 times greater than the strength of the laminated laths or lamellae, there is no brittle fracture (total failure of the binder). as would normally be the case with a pure prior art glulam beam.
  • FIG. 4 Based on FIG. 4 an alternative embodiment is shown in which also three blades L are glued together.
  • the middle lamella L2 consists of a lamella L made of laminated veneer lumber LVL.
  • this laminated veneer lamella L2 is then in each case a lamella L1 consisting of glulam BSH non-positively connected, preferably fixed by means of sizing.
  • the lamellae L1 thus preferably consist of a glued laminated timber structure, as described on the basis of the preceding exemplary embodiment according to FIGS FIGS. 3a to 3c was explained.
  • the lamella L2 persists in the variant FIG. 4 preferably from a construction, as has been explained with reference to the preceding drawings.
  • At least one upright lamellar connector which comprises at least three lamellae in one of the abovementioned sequences.
  • the structure of the slats is designed alternately transversely to their primary stress and stress direction, according to the explanations given above.
  • the structure is preferably symmetrical with respect to the vertical orientation V, ie generally symmetrical with respect to a central symmetry plane S.
  • This central plane of symmetry runs through the middle of the central lamella L1 in the exemplary embodiment FIGS. 3a to 3c or by the middle of the lamella L2 according to the embodiment according to FIG. 4 .
  • the respectively further outwardly adjoining further lamellae from the respective other wood material are insofar preferably also the same, ie constructed symmetrically, which is the use of the corresponding Woods, their composition and their width across the plane of symmetry.
  • This carrying or breaking behavior is achieved for the first time in a carrier made of wood components, because slats of wood and wood materials with the same or similar modulus E, but different strengths, are glued together.
  • the voltages present in the carrier are distributed over a constant cross-section with a constant modulus of elasticity across the carrier width under vertical load constant.
  • lamellar material for a glued laminated timber BSH and other veneer lumber LVL (sometimes abbreviated FSH also known) used.
  • FSH veneer lumber
  • other wood-based materials may also be added to the lamellar materials mentioned, or may replace them in part, for example wood-based materials with or without transverse layers (as required).
  • the tensile or pressure zones occurring depending on the constructive use can additionally be reinforced locally by high-strength lamellae.
  • the result is a further increase in the payload and rigidity of the binder cross-sections.
  • the carrier components are preferably connected to each other non-positively (for example by gluing).
  • the slats are block-glued, as has been described with reference to the embodiments.
  • FIG. 5 provides an extension to the embodiments Figure 3a - 3c represents.
  • a layer of glued-laminated glulam is externally glued on. This results in a 5-lamella structure, which is provided as preferred is also formed again symmetrically to the central symmetry or vertical plane S and V.
  • the corresponding example shows FIG. 6 for the reverse layer construction.
  • each still another layer provided, namely in this variant, in turn following the glulam slat L1 another outer slat L2 made of veneer lumber LVL.
  • the structure is again symmetrical to the mean vertical and / or symmetry plane V, S.
  • an odd-numbered lamellar structure is preferred, ie a lamellar binder with 3, 5, 7 or more lamellae, in which preferably each a veneer lumber slat L2 and a glued laminated lath L1 alternate, ie in the direction in which the individual disks are non-positively connected preferably by gluing together.
  • FIG. 1 modified embodiment received in side view, which shows large transverse through the lamellar binder through openings 31 and other smaller openings 33 on the other hand.
  • openings can be introduced into the binder and run, for example, between the two opposite generally larger-sized side surfaces 5.
  • These openings can serve, for example, that in certain cases other support and / or ceiling structures and / or conduit systems including light pipe systems, etc. therethrough can be moved.
  • Also in this case can be ensured by appropriate gluing of the individual slats as well as by specific orientations of the fibers, for example, the veneer lumber slats be that the voltages and carrying forces introduced into the lamellar binder, in particular in the area in front of and behind the openings, can be received via the material areas of the lamellar binder formed laterally by the openings.
  • the lamellae are aligned in the vertical direction V in all the embodiments shown, i. that usually the individual lamellae L, L1 and L2 are aligned in the vertical direction, ie extend in the height direction H with their greater extent, wherein the extension in height direction H for each lamella L, L1, L2 is usually greater than that in the width direction B extending extension.
  • the thickness of the illustrated lamella L2, in particular in the form of laminated veneer lumber LVL lamella L2 has a thickness which corresponds to the thickness of the individual lamellae L1 preferably in the form of glulam wood layers BSH or less than 90%, preferably less than 80%, 60% , 40% or less than 20% of it deviates.
  • the thickness or width B of the lamella L2 preferably made of laminated veneer lumber LVL preferably has a thickness which corresponds to the thickness of the lamella L1 preferably in the form of glulam BSH or at least not less than 10% of this value.
  • the thickness of the laminated lath L1 may preferably be between 20 cm and a minimum value of 10% thereof, ie 2 cm.
  • the illustrated embodiments have been explained so that preferably the veneer lumber lamination L2 has the same or up to a maximum of 50% greater modulus of elasticity than the glulam lamella L1, and that the strength of the laminated veneer lamella L2 is preferably at least 1.4 to preferably 4.0 times greater than the strength of the glulam lamella L1.
  • the modulus of elasticity of the lamination type L2 in general and the laminated veneer lamella L2 in particular preferably at most 45%, particularly preferably at most 40%, 35%, 30%, 25%, 20%, 15%, 10% and preferably only a maximum of 5% greater than the modulus of elasticity of the other plate type L1, in particular in the form of the laminated glued laminated lath L1.
  • the invention can be realized so that the lamellae L, L1 and L2 are made of wood components, ie made of wood and wood-based materials, wherein the at least two different lamellae as described have the same or a correspondingly similar modulus of elasticity, but different Strengths, with the above limits.
  • a limitation to the laminated veneer lamella and / or the glulam lamella is not so far, although the preferred embodiments have been explained with reference to these types of lamellae.
  • the lamella assembly comprising at least three lamellae always comprises two louvers L1 of a first louver type and at least one louver L2 of a second louver type or conversely two louvers L2 of the second louver type and at least one lamination L1 of the first louver type.
  • the lamellae L1 and L2 in this case, too, those properties, as explained with reference to the above-mentioned embodiments with reference to the existing of glulam or veneer lumber wood slats.
  • glulam and veneer lumber have been addressed.
  • Both conifers and hardwood or hardwood hybrid products can be used for the structural implementation within the scope of the invention.
  • beech glulam and beech hybrid glulam can be used.
  • especially hardwood and hardwood hybrid glued laminated timber is suitable.
  • Other hardwood products may also include or consist of laminated veneer lumber (LVL), including thermally modified wood, especially when used outdoors. Restrictions on certain types of wood do not exist in principle.
  • the lamellar composite as a whole and / or the individual connected to the lamellar composite Slats predominantly or at least more than 70 weight and / or volume percent, preferably at least 80, 85, 90, 95, 96, 97, 98 or at least 99 weight percent and / or volume percent of wood, wood products and / or wood components exist (apart from the still to be used in addition non-positive connections, preferably in the form of glue, etc.).
  • Glulam is also frequently spoken of, ie a term formed from the words "glued laminated timber", which stands for glued laminated timber.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
EP16157661.6A 2016-02-26 2016-02-26 Support de bois en forme de jonction de lamelles Withdrawn EP3211151A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16157661.6A EP3211151A1 (fr) 2016-02-26 2016-02-26 Support de bois en forme de jonction de lamelles

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Application Number Priority Date Filing Date Title
EP16157661.6A EP3211151A1 (fr) 2016-02-26 2016-02-26 Support de bois en forme de jonction de lamelles

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EP3211151A1 true EP3211151A1 (fr) 2017-08-30

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08187706A (ja) * 1995-01-10 1996-07-23 Misawa Homes Co Ltd 集成材
DE102010000201A1 (de) * 2009-02-05 2011-02-17 Eichinger Schreinerei Gmbh Holzverbundbauelement und Gebäudeteil mit mehreren solcher Bauelemente
EP2227605B1 (fr) 2007-12-19 2013-05-01 Mathias Hofmann Procédé de production d'un assemblage longitudinal pour composants en bois, et composant en bois correspondant
JP2014094497A (ja) * 2012-11-09 2014-05-22 Akita Prefectural Univ 単板集成材積層体
WO2015120865A1 (fr) 2014-02-13 2015-08-20 Hess Timber Gmbh & Co. Kg Poutre en bois

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08187706A (ja) * 1995-01-10 1996-07-23 Misawa Homes Co Ltd 集成材
EP2227605B1 (fr) 2007-12-19 2013-05-01 Mathias Hofmann Procédé de production d'un assemblage longitudinal pour composants en bois, et composant en bois correspondant
DE102010000201A1 (de) * 2009-02-05 2011-02-17 Eichinger Schreinerei Gmbh Holzverbundbauelement und Gebäudeteil mit mehreren solcher Bauelemente
JP2014094497A (ja) * 2012-11-09 2014-05-22 Akita Prefectural Univ 単板集成材積層体
WO2015120865A1 (fr) 2014-02-13 2015-08-20 Hess Timber Gmbh & Co. Kg Poutre en bois

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