EP2954124A1 - Wooden strut construction comprising a first strut support member and at least one second strut support member, said members being force-locked together at a node point - Google Patents

Wooden strut construction comprising a first strut support member and at least one second strut support member, said members being force-locked together at a node point

Info

Publication number
EP2954124A1
EP2954124A1 EP14705708.7A EP14705708A EP2954124A1 EP 2954124 A1 EP2954124 A1 EP 2954124A1 EP 14705708 A EP14705708 A EP 14705708A EP 2954124 A1 EP2954124 A1 EP 2954124A1
Authority
EP
European Patent Office
Prior art keywords
support member
rod
bar
construction according
force introduction
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
EP14705708.7A
Other languages
German (de)
French (fr)
Other versions
EP2954124B1 (en
Inventor
Wieland Becker
Jan Weber
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.)
Hochschule Trier - Trier University of Applied Sciences
Original Assignee
Hochschule Trier - Trier University of Applied Sciences
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 Hochschule Trier - Trier University of Applied Sciences filed Critical Hochschule Trier - Trier University of Applied Sciences
Publication of EP2954124A1 publication Critical patent/EP2954124A1/en
Application granted granted Critical
Publication of EP2954124B1 publication Critical patent/EP2954124B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
    • E04B1/2604—Connections specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/48—Dowels, i.e. members adapted to penetrate the surfaces of two parts and to take the shear stresses
    • E04B1/486—Shear dowels for wood
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
    • E04B1/2604—Connections specially adapted therefor
    • E04B2001/2668—Connections specially adapted therefor for members with a round cross-section
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
    • E04B1/2604—Connections specially adapted therefor
    • E04B2001/2676—Connector nodes

Definitions

  • the invention relates to a wooden bar construction with a first bar support member and at least one second bar support member, the non-positively in a node
  • Wooden bar structures composed of individual bar supports are known above all as statically supporting structures for buildings, halls, roofs and the like, but also as load-bearing structural elements such as trusses, masts, etc. They are used both to produce flat and three-dimensional
  • Characteristic of such bar constructions is that the individual bar support members, such as round or square timbers, converge like a truss in nodes. Since the power flow follows the longitudinal axes of the bar support members, this results in a load concentration and load deflection in the nodal area. The highly loaded nodes in this way is thus of central importance within the entire rod construction.
  • connection surfaces for the individual bar support members it is known to provide a node plate in the node, which has connection surfaces for the individual bar support members.
  • the node may be formed so that the connection surfaces are within the wood cross section, to which the bar support member is slotted normally, or outside of the wood cross section, for example, in gusset plates with shoe-shaped receptacles, in which the ends of the bar support members are inserted.
  • the frictional connection between gusset plate and bar support member is usually carried out across transversely to the rod support member longitudinal axis in the bar support member introduced dowels or nailing.
  • Shifting paths add up to a relatively large slip and thus undesirably large deformations of the overall construction. Overall, it was found in such bar structures that only 60% to 70% of the forces coming from the bar support members are transmitted in the junctions.
  • the invention is based on the object
  • the basic idea of the invention is to provide a molded body in the junction of a wooden bar construction which has defined force introduction surfaces for connecting a plurality of bar support members.
  • Rod construction occur only to a small extent.
  • a further advantage of the invention results from the load transfer behavior typical of bar structures, in which essentially only tensile and compressive forces occur in the individual bar support members, which are deflected at the junctions. In known rod constructions, this leads to an unfavorable stress of the rod support members in the node, since the introduction of force is directed obliquely to the fiber.
  • the moldings replace the bar support members in the nodes, so that the bar support members are claimed only fiber parallel.
  • This has the advantage that the inhomogeneous and anisotropic material properties of the material wood in the heavily loaded node at force application obliquely to the fiber are no longer relevant for the dimensioning of the rod support members.
  • the bar construction can therefore be designed not only more efficient and economical, but also slimmer and therefore more aesthetic.
  • the shaped body is preferably produced by the casting method, 3D printing process or by milling from a solid material and consists for example of cold ceramics, mineral casting, metal, plastic, in particular a thermoset, or of a cement or polymer-bound concrete.
  • This has the advantage that even spatially complex shapes can be realized in a simple manner.
  • it is possible to adapt the shape of the molded body to the force curve in order to avoid peak stresses within the cross section.
  • Moldings are available for load transfer while in less strong
  • the shaped body has a homogeneous structure, its mechanical properties are constant over the entire volume.
  • a nodal point according to the invention does not structurally impart a joint, but is able to absorb and transmit bending moments to a certain extent. This property can be improved if the connection of a bar support member to a shaped body has two or more rod-shaped, laterally spaced connecting elements, one of which acts under load as a push rod and another as a pull rod.
  • Miter cuts and the like are eliminated, which significantly reduces the effort involved in joinery.
  • Material properties ensures the pressure element for a defined power transmission from the rod support member to the molded body independent of the imperfections of the material wood.
  • the pressure element is positively embedded in a recess at the end of the rod support member and / or in the force introduction surface of the shaped body, whereby a positional fixation of the pressure element is first achieved.
  • the pressure element can be made of a material with ductile properties, which allows the reduction of stress peaks by deformation-induced load transfer. According to the invention, plastics with elasto-plastic behavior or suitable elastomers are preferred for this purpose. When using a pressure element with elastic properties, small
  • Suitable pressure elements consist for example of elastomers, preferably of Cloroprene rubber or natural rubber, in which optionally reinforcement inserts can be integrated.
  • the pressure element On its front side facing the shaped body, the pressure element can be provided with a profiling, so that transverse forces are not removed by the rod-shaped connecting element only in the transverse force load in the connection area, but also on the pressure element.
  • a pressure element with a cylindrical or disc-shaped shape, which sits coaxially on the rod-shaped connecting element. In this way, an extremely compact node structure is realized, which allows to lead several rod support members in the node together, without these interfere with each other.
  • Another embodiment provides, instead of the pressure ring, a hardenable
  • Potting compound adapts to the local geometric conditions in the hub and therefore is able to compensate for manufacturing or assembly-related tolerances.
  • the potting compound can have the same material properties in the set condition as the pressure element.
  • Another embodiment of the invention combines the two above-described solutions and their advantages by a pressure ring between the rod support member and molded body is arranged, which also forms the cavity for the potting compound at the same time.
  • the connecting elements are preferably glued or screwed into the bores.
  • FIG. 2 shows an oblique view of the embodiment of the invention shown in FIG. 1, FIG.
  • FIG. 5 is an oblique view of the molding shown in Fig. 4,
  • FIG. 6 is an oblique view of a fourth embodiment of the invention.
  • Fig. 7 is an oblique view of the molding shown in Fig. 6 including
  • Fig. 8 is a section through the embodiment shown in Fig. 6, and the
  • the bar support member 1 represents a diagonal strut whose longitudinal axis 3 at an angle ⁇ to the longitudinal axis 4 of the second bar support member 2, for example a support , runs.
  • a Shaped body 6 At the intersection of the longitudinal axis 3 of the first bar support member 1 with the peripheral surface 5 of the second bar support member 2 is a Shaped body 6, which is shown in Fig. 2 on a larger scale in an oblique view.
  • the molded body 6 is formed as a monolithic cast body 2 and has approximately wedge shape.
  • the molded body 6 consists of polymer concrete, so is composed of a mineral aggregate and a polymer matrix as a binder, this mixture optionally fibers for reinforcement and
  • Strength increase may contain.
  • Other materials such as metal, ceramic, high strength concrete and the like are also within the scope of the invention.
  • the molded body 6 has a first force introduction surface 7 which is perpendicular to
  • first force introduction surface 7 has a circular shape, but it can also take any other arbitrary shape, for example, be square or rectangular.
  • a cylindrical cavity 8 is provided, which runs parallel to the longitudinal axis 3 and ends blindly in the molded body 6.
  • the first force introduction surface 7 serves as a support for the first bar support member 1.
  • the shaped body 6 On its side which is assigned to the second bar support member 2, the shaped body 6 has a second force introduction surface 9, which rests completely on the circumference 5 of the second bar support member 2.
  • the second force introduction surface 9 has a rectangular ground plan and, in the case of a round timber, runs curved as a second bar support member 2 and, in the case of a square timber, as a second bar support member 2.
  • Force introduction surface 9 may be provided with a profiling in order to bring about a toothing with the circumference 5 of the second rod support member 2 to increase the transferable force.
  • a recess 10 having a preferably cylindrical shape.
  • the lateral surface of the shaped body 6 results essentially from the entirety of all the first force introduction surface 7 and second force introduction surface 9 connecting
  • an inventive shaped body 6 is penetrated by two approximately parallel channels 11, which, starting from the lying between the first force introduction surface 7 and second force introduction surface 9 peripheral surface 12 to the second
  • Force introduction surface 9 extend and thereby directed perpendicular to the longitudinal axis 3 Course ends at the height of the recess 10 or higher.
  • the channels 1 1 serve to receive and guide fasteners, not shown.
  • the molded body 6 lies in its intended use with the second force introduction surface 9 over its entire surface on the circumference 5 of the second rod support member 2. This ensures a nail-like driven into the second rod support member 2, with its head positively engaging in the recess 10 centering mandrel 15 the
  • the load-bearing fastening means are not shown in Figs. 1 and 2, however, consist of high-strength bolts which extend through the channels 11 and extend with their threaded portion respectively in the solid wood of the second bar support member 2.
  • the channels 11 may be formed by sleeves embedded in the shaped body 6.
  • the second bar support member 2 may have at its periphery an axially acting abutment surface which receives the parallel to the longitudinal axis 4 force component from the shaped body 6.
  • the diameter of the blind hole 17 preferably corresponds to that of the cylindrical cavity 8 in the molded body 6.
  • the blind hole 17 intersects with a likewise extending from the end face 16 and extending coaxially to the longitudinal axis 3 circular cylindrical
  • Bar support member 1 For the inventive design of the node, the provision of the recess 18 is indeed advantageous, but not essential. Likewise, only the blind hole 17 could be arranged in the force introduction surface 7.
  • the connecting element 19 consists in the present example of a Steel bar with profiled peripheral surface, preferably with a circumferential external thread to improve the power transmission between the connecting element 19 and the first bar support member 1. This does not exclude that the connecting element 19 may also have a smooth surface in a simple embodiment.
  • composite materials such as glass fiber or carbon fiber reinforced plastics, which are easy and
  • a disk-shaped pressure element 20 is inserted coaxially with the axis 3 into the recess 18 of the first bar support member 1 and is axially penetrated by the connecting element 19.
  • the molded body 6 facing end face 21 of the pressure element 20 forms a projection on the end face 16 of the first rod support member 1, with the aim to initiate compressive forces on this end face 21 in the molding 6.
  • the pressure element 20 is made of a material with ductile properties, e.g. made of a suitable elastomer or of a plastic with elastic and / or plastic behavior.
  • the rod-shaped connecting element 19 and the pressure element 20 act together, wherein tensile forces from the connecting element 19, compressive forces together by the connecting element 19 and pressure element 20, transverse forces from the connecting element 19 and bending moments together from the connecting element 19 and pressure element 20th
  • connecting element 19 has elastic properties, small twists about the longitudinal axis of the connecting element 19 are permitted.
  • the interaction of connecting element 19 and elastic pressure element 20 results in a spring system whose spring stiffness over the diameter, the thickness and the
  • Material rigidity of the pressure element 20 can be adjusted.
  • Fig. 3 shows the implementation of the invention on a truss girder, of which only a longitudinal section is shown. Both upper flange and lower flange of the truss girder are each formed by a second truss member 2, which by means of the
  • Embodiment of the invention a molding 6 'before, resulting from a geometric fusion of two moldings 6 according to Figures 1 and 2, the first
  • Force introduction surface 7 ' which is arranged with respect to the plane of symmetry 22 mirror image of the first force introduction surface 7.
  • FIGS. 1 to 3 disclose molded bodies 6, 6 'in which the first force introduction surface 7 or 7' and the second force introduction surface 9
  • bar support member 1 extends and the force introduction surface 9 parallel to the bar support member second
  • Shaped body 6 " which serves at the upper end of a first bar support member 1 serving as a support, is connected to the shaped body 6" by four further bar support members 1 ', 1 ", 1"', 1 "", for example, the struts of a roof or ceiling construction form.
  • FIGS. 6 and 7 The subject matter of FIGS. 6 and 7 is a fourth embodiment of a knot formation according to the invention, which shows that spatially complex rod constructions can also be realized with the invention.
  • the peculiarity of this embodiment is that in the connection region of the bar support members 1, 1 ', 1 ", 1"' to the shaped body 6 "'particularly good bending moments can be transmitted.
  • the molded body 6 ' consists of a disk-like, multi-curved body, to which from different spatial directions 23, 23', 23", 23 "', 23" "arriving
  • Rod support members 1, 1 ', 1 ", 1"' connect.
  • the molded body 6 "'has force introduction surfaces 7, 7', 7", 7 "'with a rectangular plan, each
  • the bar support members 1, 1 ', 1 ", 1"' also have a rectangular cross-section which corresponds to the outline of the force introduction surfaces 7, 7 ', 7 ", 7"'.
  • In the end faces 16, 16 ', 16 "16"', 16 “” of the bar support members 1, 1 ', 1 ", 1'” are each introduced two blind holes, whose arrangement corresponds to the rod-shaped connecting elements 19, 19 'and the To serve the same.
  • the production of the finished knot shown in Figure 6 is done by joining the bar support members 1, 1 ', 1 ", 1"' with the molded body 6 "', wherein the rod-shaped connecting elements 19, 19' both in the cavities 8 in
  • Shaped body 6 "'and in the blind holes of the bar support members 1, 1', 1", 1 "'are anchored.
  • Embodiment by a pressure element which, as described in Figures 1 to 5, the rod-shaped connecting elements 19, 19 'encompassing between the end face 16 and the force introduction surface 7 is arranged.
  • the pressure element may be formed in one piece and be penetrated by two connecting elements 19, 19 'or consist of two separate parts, of which in each case a part is associated with a connecting element 19 or 19' or surrounds them like a ring.
  • the pressure element may be arranged in recesses in the force introduction surfaces or between plan
  • Figures 8 to 10 relate to constructive variations of the connection area between a first bar support member 1 and mold body 6, for all of the above
  • Fig. 8 shows the node-side end of a first bar support member 1, whose
  • the first bar support member 1 ends with a perpendicular to the axis 3 extending end face 16, which has a coaxial recess 18. From the bottom of the recess 18 extend axially parallel to the axis 3 two
  • the end face 16 axially opposite the force introduction surface 7 of the shaped body 6 is shown.
  • the force introduction surface 7 is also aligned perpendicular to the axis 3 and has a recess 18 axially opposite recess 24, from the bottom of two axially parallel cylindrical cavities 8, 8 'rich in the molding 6.
  • the cavities 8, 8 ' are aligned axially with the blind bores 17, 17'.
  • Push rod and the other rod-shaped connecting element acts as a pull rod.
  • Potting compound 26 the pressure element with which transverse forces are transmitted in the connecting joint and compressive forces in the axial direction.
  • FIG. 10 shows a combination of the embodiment of FIG. 9 with a pressure element 20 'between the first rod support member 1 and molded body 6.
  • the pressure element 20' has an annular shape and is arranged coaxially in radially clear distance from the rod-shaped connecting element 19.
  • the specific space for the potting compound 25 25 is thus formed by the cylindrical recess 18, the recess 24 and the pressure element 20 ', including the inner periphery of the pressure element 20' with the
  • a radial injection channel 27 extends into the space 25 inside.
  • the associated vent channel 28 also extends in the radial direction from the space 25 to the outer periphery of the first rod support member first

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

Abstract

The invention relates to a wooden strut construction comprising a first strut support member and at least one other strut support member, said members being force-locked together at a node point. A moulded body is situated in the region of the node point, said body having a first force transfer surface for connecting the first strut support member and at least one second force transfer surface for connecting the other strut support member. In order to improve the load transfer behaviour of the strut construction and to reduce deformations due to the load, according to the invention the first force transfer surface runs perpendicularly to the longitudinal axis of the first strut support member, at least one cylindrical cavity is located in the moulded body, said cavity running from the first force transfer surface coaxially with or parallel to the longitudinal axis of the first strut support member, at least one bore, which is coaxial with or parallel to the longitudinal axis of the first strut support member, is located in the end of the first strut support member facing towards the first force transfer surface, and a respective strut-type connecting element is anchored in a force-locked manner in both the at least one cylindrical cavity in the moulded body and in the at least one bore in the first strut support member.

Description

Stabkonstruktion aus Holz mit einem ersten Stabtragglied und mindestens einem zweiten Stabtragglied, die in einem Knotenpunkt kraftschlüssig miteinander  Bar construction made of wood with a first bar support member and at least one second bar support member, the non-positively in a node with each other
verbunden sind are connected
Beschreibung: Technisches Gebiet: Description: Technical area:
Die Erfindung betrifft eine Stabkonstruktion aus Holz mit einem ersten Stabtragglied und mindestens einem zweiten Stabtragglied, die in einem Knotenpunkt kraftschlüssig The invention relates to a wooden bar construction with a first bar support member and at least one second bar support member, the non-positively in a node
miteinander verbunden sind, entsprechend dem Oberbegriff des Patentanspruchs 1. are interconnected, according to the preamble of claim 1.
Stand der Technik: State of the art:
Aus einzelnen Stabtraggliedern zusammengesetzte Stabkonstruktionen aus Holz sind vor allem als statisch tragende Strukturen für Gebäude, Hallen, Dächer und dergleichen bekannt, aber auch als lastabtragende Bauelemente wie zum Beispiel Fachwerkträger, Masten etc. Sie dienen sowohl zur Herstellung flächiger als auch dreidimensionaler Wooden bar structures composed of individual bar supports are known above all as statically supporting structures for buildings, halls, roofs and the like, but also as load-bearing structural elements such as trusses, masts, etc. They are used both to produce flat and three-dimensional
Tragwerke. Structures.
Charakteristisch für derartige Stabkonstruktionen ist, dass die einzelnen Stabtragglieder, wie zum Beispiel Rund- oder Kanthölzer, fachwerkartig in Knotenpunkten zusammenlaufen. Da der Kraftfluss den Längsachsen der Stabtragglieder folgt, kommt es auf diese Weise zu einer Lastkonzentration und Lastumlenkung im Knotenbereich. Den auf diese Weise hoch belasteten Knotenpunkten kommt somit eine zentrale Bedeutung innerhalb der gesamten Stabkonstruktion zu. Characteristic of such bar constructions is that the individual bar support members, such as round or square timbers, converge like a truss in nodes. Since the power flow follows the longitudinal axes of the bar support members, this results in a load concentration and load deflection in the nodal area. The highly loaded nodes in this way is thus of central importance within the entire rod construction.
Zur Verbindung zweier oder mehrerer Stabtragglieder ist es bekannt, im Knotenpunkt ein Knotenblech vorzusehen, das Anschlussflächen für die einzelnen Stabtragglieder aufweist. Der Knotenpunkt kann dabei so ausgebildet sein, dass die Anschlussflächen innerhalb des Holzquerschnitts liegen, wozu das Stabtragglied im Regelfall geschlitzt ist, oder außerhalb des Holzquerschnitts zum Beispiel bei Knotenblechen mit schuhförmigen Aufnahmen, in die die Enden der Stabtragglieder eingelegt werden. Die kraftschlüssige Verbindung zwischen Knotenblech und Stabtragglied erfolgt im Regelfall über quer zur Stabtraggliedlängsachse in das Stabtragglied eingebrachte Dübel oder eine Vernagelung. For connecting two or more bar support members, it is known to provide a node plate in the node, which has connection surfaces for the individual bar support members. The node may be formed so that the connection surfaces are within the wood cross section, to which the bar support member is slotted normally, or outside of the wood cross section, for example, in gusset plates with shoe-shaped receptacles, in which the ends of the bar support members are inserted. The frictional connection between gusset plate and bar support member is usually carried out across transversely to the rod support member longitudinal axis in the bar support member introduced dowels or nailing.
BESTÄTIGUNGSKOPIE Bei dieser Verbindungsart erweist es sich zunächst als nachteilig, dass durch das Schlitzen des Holzquerschnitts und/oder das Anordnen von Querdübeln die zur Lastabtragung zur Verfügung stehende Holzquerschnittsfläche verringert wird, mit der Folge einer verminderten Tragfähigkeit der Stabkonstruktion. CONFIRMATION COPY In this type of connection, it initially proves to be disadvantageous that the wood cross-sectional area available for load transfer is reduced by slitting the wood cross-section and / or arranging transverse dowels, with the consequence of reduced load bearing capacity of the bar construction.
Typisch für derartige Stabkonstruktionen ist zudem, dass deren volle Tragfähigkeit erst durch Aktivierung der Lochleibungsflächen erreicht wird. Die dafür notwendigen minimalen Typical of such rod designs is also that their full carrying capacity is achieved only by activating the Lochleibungsflächen. The necessary minimum
Verschiebewege summieren sich zu einem verhältnismäßig großen Schlupf und damit unerwünscht großen Verformungen der Gesamtkonstruktion. Insgesamt wurde bei solchen Stabkonstruktionen festgestellt, dass in den Knotenpunkten lediglich 60 % bis 70 % der aus den Stabtraggliedern kommenden Kräfte übertragen werden. Shifting paths add up to a relatively large slip and thus undesirably large deformations of the overall construction. Overall, it was found in such bar structures that only 60% to 70% of the forces coming from the bar support members are transmitted in the junctions.
Daneben ist es auch bekannt, Stabtragglieder aus Holz nach Zimmermannsart mittels Zapfen, Knaggen und dergleichen zu verbinden. Das dieser Verbindungsart zugrunde liegende Prinzip beruht darauf, die Kraftüberleitung durch Herstellung eines Formschlusses zu bewerkstelligen. Der Nachteil liegt jedoch in der sehr zeitintensiven Herstellung der Formschlussmittel aufgrund deren vorgegebenen Geometrie und der eingeschränkten Einsetzbarkeit dieser Verbindungsart aufgrund der abnehmenden Kraftübertragung bei größer werdenden Kraft-Faser Winkeln. In addition, it is also known to connect wooden support members by Zimmermannsart by means of pins, catches and the like. The underlying principle of this type of connection is based on the transfer of force by producing a positive connection to accomplish. The disadvantage, however, is the very time-consuming production of the positive locking means due to their given geometry and the limited applicability of this type of connection due to the decreasing power transmission at increasing force-fiber angles.
Darstellung der Erfindung: Presentation of the invention:
Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, das Against this background, the invention is based on the object
Lastabtragungsverhalten von Stabkonstruktionen in deren Knotenpunkten zu verbessern und lastbedingte Verformungen zu minimieren. Improve load transfer behavior of bar structures in their nodes and to minimize load-induced deformations.
Diese Aufgabe wird durch eine Stabkonstruktion mit den Merkmalen des Patentanspruchs 1 gelöst. This object is achieved by a rod construction with the features of patent claim 1.
Vorteilhafte Ausführungsformen ergeben sich aus den Unteransprüchen. Advantageous embodiments will be apparent from the dependent claims.
Der Grundgedanke der Erfindung besteht darin, im Knotenpunkt einer Stabkonstruktion aus Holz einen Formkörper vorzusehen, der definierte Krafteinleitungsflächen zum Anschluss mehrerer Stabtraggliedern besitzt. Durch die erfindungsgemäße Ausbildung der Verbindung zwischen Formkörper und Stabtraggliedern ist im Verbindungsbereich jeglicher Schlupf aus der Stabkonstruktion eliminiert, mit dem Vorteil, dass Verformungen innerhalb der The basic idea of the invention is to provide a molded body in the junction of a wooden bar construction which has defined force introduction surfaces for connecting a plurality of bar support members. As a result of the inventive construction of the connection between the shaped body and the bar support members, any slippage in the connection area is eliminated from the bar construction, with the advantage that deformations within the bar structure are eliminated
Stabkonstruktion in nur geringem Umfang auftreten. Ein weiterer Vorteil der Erfindung ergibt sich aus dem für Stabkonstruktionen typischen Lastabtragungsverhalten, bei dem in den einzelnen Stabtraggliedern im Wesentlichen nur Zug- und Druckkräfte auftreten, die in den Knotenpunkten umgelenkt werden. Bei bekannten Stabkonstruktionen führt dies zu einer ungünstigen Beanspruchung der Stabtragglieder im Knotenpunkt, da die Krafteinleitung schräg zur Faser gerichtet ist. Rod construction occur only to a small extent. A further advantage of the invention results from the load transfer behavior typical of bar structures, in which essentially only tensile and compressive forces occur in the individual bar support members, which are deflected at the junctions. In known rod constructions, this leads to an unfavorable stress of the rod support members in the node, since the introduction of force is directed obliquely to the fiber.
Gemäß der Erfindung ersetzen die Formkörper die Stabtragglieder in den Knotenpunkten, so dass die Stabtragglieder nur noch faserparallel beansprucht werden. Dies hat den Vorteil, dass die inhomogenen und anisotropen Materialeigenschaften des Werkstoffs Holz im hoch belasteten Knotenpunkt bei Krafteinleitung schräg zur Faser nicht mehr maßgebend für die Dimensionierung der Stabtragglieder sind. Stattdessen kann durch das Vorsehen eines Formkörpers aus einem homogenen Material mit definierten Materialeigenschaften speziell auf die im Knotenpunkt vorherrschende Belastung abgestellt werden. Die Stabkonstruktion kann daher nicht nur leistungsfähiger und wirtschaftlicher, sondern auch schlanker und damit ästhetischer konzipiert werden. According to the invention, the moldings replace the bar support members in the nodes, so that the bar support members are claimed only fiber parallel. This has the advantage that the inhomogeneous and anisotropic material properties of the material wood in the heavily loaded node at force application obliquely to the fiber are no longer relevant for the dimensioning of the rod support members. Instead, by providing a shaped body of a homogeneous material with defined material properties, it is possible to focus specifically on the load prevailing in the nodal point. The bar construction can therefore be designed not only more efficient and economical, but also slimmer and therefore more aesthetic.
Der Formkörper wird vorzugsweise im Formgussverfahren, 3D-Printverfahren oder durch Fräsen aus einem Vollmaterial hergestellt und besteht beispielsweise aus Kaltkeramik, Mineralguss, Metall, Kunststoff, insbesondere einem Duroplasten, oder aus einem zement- oder polymergebundenen Beton. Das bringt den Vorteil, dass selbst räumlich komplexe Formgebungen auf einfache Art und Weise realisierbar sind. So ist es möglich, die Gestalt des Formkörpers an den Kraftverlauf anzupassen, um Spitzenspannungen innerhalb des Querschnitts zu vermeiden. Bei geeigneter Materialwahl liegen die Festigkeiten des The shaped body is preferably produced by the casting method, 3D printing process or by milling from a solid material and consists for example of cold ceramics, mineral casting, metal, plastic, in particular a thermoset, or of a cement or polymer-bound concrete. This has the advantage that even spatially complex shapes can be realized in a simple manner. Thus, it is possible to adapt the shape of the molded body to the force curve in order to avoid peak stresses within the cross section. With a suitable choice of material, the strengths of the
Formkörpers weit über denen des anzuschließenden Stabtragglieds, mit dem Vorteil, dass innerhalb der Stabkonstruktion in Bereichen mit hoher Lastkonzentration hochfeste Shaped body far above that of the bar support member to be connected, with the advantage that within the rod construction in areas with high load concentration high-strength
Formkörper zur Lastabtragung zur Verfügung stehen, während in weniger stark Moldings are available for load transfer while in less strong
beanspruchten Bereichen die vergleichsweise geringere Festigkeit der Stabtragglieder aus Holz für die Lastabtragung ausreicht. Das spezifische Tragverhalten der Stabkonstruktion folgt auf diese Weise der Intensität der Belastungen, wodurch unwirtschaftliche claimed areas the comparatively lower strength of the wooden beam support members is sufficient for the load transfer. The specific load-bearing behavior of the bar construction follows in this way the intensity of the loads, thereby uneconomic
Überdimensionierungen vermieden werden. Da der Formkörper eine homogene Struktur besitzt, sind dessen mechanische Eigenschaften über das gesamte Volumen konstant. Oversizing be avoided. Since the shaped body has a homogeneous structure, its mechanical properties are constant over the entire volume.
Sicherheitsbeiwerte zur Berücksichtigung des Faserverlaufs sowie der Anisotropie und Inhomogenität des Werkstoffs Holz können daher niedriger angesetzt werden, was ebenfalls zu einer schlankeren und wirtschaftlicheren Bauweise fühlt. Da bei einer erfindungsgemäßen Stabkonstruktion jeglicher Schlupf aus dem statischen System eliminiert ist, verkörpert ein erfindungsgemäße Knotenpunkt in statischer Hinsicht kein Gelenk, sondern ist in der Lage, in bestimmtem Umfang Biegemomente aufzunehmen und zu übertragen. Diese Eigenschaft kann verbessert werden, wenn der Anschluss eines Stabtragglieds an einen Formkörper zwei oder mehr stabförmige, seitlich beabstandete Verbindungselemente aufweist, von denen eines unter Last als Druckstab und ein anderes als Zugstab wirkt. Therefore, safety factors to take into account the grain shape as well as the anisotropy and inhomogeneity of the material wood can be set lower, which also leads to a slimmer and more economical construction. Since in a bar construction according to the invention any slip is eliminated from the static system, a nodal point according to the invention does not structurally impart a joint, but is able to absorb and transmit bending moments to a certain extent. This property can be improved if the connection of a bar support member to a shaped body has two or more rod-shaped, laterally spaced connecting elements, one of which acts under load as a push rod and another as a pull rod.
Ein weiterer Vorteil der Erfindung wird beim Abbinden einer Stabkonstruktion deutlich. Durch die Anordnung erfindungsgemäßer Formkörper in den Knotenpunkten, genügt es, die einzelnen Stabtragglieder mittels eines einfach auszuführenden Kappschnitts senkrecht zur ihrer Längsachse abzulängen. Zeit- und arbeitsintensives Aufreißen von Winkeln, Another advantage of the invention will become apparent when setting a rod construction. By arranging molded bodies according to the invention in the nodal points, it is sufficient to cut the individual bar support members perpendicular to their longitudinal axis by means of a simple cut-off cut. Time and labor intensive tearing of angles,
Gehrungsschnitten und dergleichen entfällt, wodurch sich der Aufwand beim Abbund entscheidend verringert. Miter cuts and the like are eliminated, which significantly reduces the effort involved in joinery.
Gemäß einer vorteilhaften Ausführungsform der Erfindung ist zwischen der ersten According to an advantageous embodiment of the invention is between the first
Krafteinleitungsfläche des Formkörpers und dem Ende des ersten Stabtragglieds ein kraftübertragendes Druckelement angeordnet. Aufgrund seiner homogenen Force introduction surface of the molding and the end of the first rod support member arranged a force-transmitting pressure element. Because of its homogeneous
Materialeigenschaften sorgt das Druckelement für eine definierte Kraftübertragung vom Stabtragglied zum Formkörper unabhängig von den Imperfektionen des Werkstoffs Holz. Material properties ensures the pressure element for a defined power transmission from the rod support member to the molded body independent of the imperfections of the material wood.
In Weiterbildung dieser Ausführungsform ist das Druckelement formschlüssig in eine Ausnehmung am Ende des Stabtragglieds und/oder in der Krafteinleitungsfläche des Formkörpers eingelassen, wodurch zunächst eine Lagefixierung des Druckelements erreicht wird. Durch vollflächiges Einkleben des Druckelements in eine oder gegebenenfalls beide Ausnehmung werden darüber hinaus Druckkräfte zwischen Stabtragglied und Formkörper nicht nur in der Stoßfläche übertragen, sondern zusätzlich über die Umfangsfläche des Druckelements. Im Hinblick auf ein optisch ansprechendes Erscheinungsbild wird das Druckelement fast vollständig von der Ausnehmung aufgenommen und ist daher quasi nicht sichtbar. In a further development of this embodiment, the pressure element is positively embedded in a recess at the end of the rod support member and / or in the force introduction surface of the shaped body, whereby a positional fixation of the pressure element is first achieved. By full-surface gluing of the pressure element in one or optionally both recess pressure forces between the rod support member and molded body are not only transmitted in the abutment surface, but also on the peripheral surface of the pressure element. With regard to a visually appealing appearance, the pressure element is almost completely absorbed by the recess and is therefore virtually invisible.
Das Druckelement kann aus einem Material mit duktilen Eigenschaften bestehen, was den Abbau von Spannungsspitzen durch verformungsbedingte Lastumlagerung ermöglicht. Erfindungsgemäß bevorzugt sind hierzu Kunststoffe mit elasto-plastischem Verhalten oder geeignete Elastomere. Bei Verwendung eines Druckelements mit elastischen Eigenschaften können kleine The pressure element can be made of a material with ductile properties, which allows the reduction of stress peaks by deformation-induced load transfer. According to the invention, plastics with elasto-plastic behavior or suitable elastomers are preferred for this purpose. When using a pressure element with elastic properties, small
Verdrehungen um die zentrische Achse des Stahlstabes zugelassen werden, so dass im Zusammenspiel ein zug-, druck- und biegebeanspruchbarer Anschluss an den Knotenpunkt mit einer einstellbaren Federsteifigkeit entsteht. Dabei kann die Federsteifigkeit über den Durchmesser, die Dicke und die Materialsteifigkeit des Druckelements eingestellt werden. Imperfektionen, zum Beispiel Schiefstellungen aus asymmetrischen Lasten können somit elegant und zwängungsarm im Knotenpunkt übertragen werden. Geeignete Druckelemente bestehen beispielsweise aus Elastomeren, vorzugsweise aus Cloroprenkautschuk oder Naturkautschuk, in die gegebenenfalls Bewehrungseinlagen integriert sein können. Twists about the central axis of the steel bar are allowed, so that in interaction creates a zug-, pressure and bending-resistant connection to the node with an adjustable spring stiffness. In this case, the spring stiffness on the diameter, the thickness and the material stiffness of the pressure element can be adjusted. Imperfections, for example, inclinations of asymmetric loads can thus be transmitted elegantly and with little constraint in the junction. Suitable pressure elements consist for example of elastomers, preferably of Cloroprene rubber or natural rubber, in which optionally reinforcement inserts can be integrated.
An seiner dem Formkörper zugewandten Stirnseite kann das Druckelement mit einer Profilierung versehen sein, so dass bei einer Querkraftbeanspruchung im Anschlussbereich Querkräfte nicht allein vom stabförmigen Verbindungselement abgetragen werden, sondern zusätzlich auch über das Druckelement. On its front side facing the shaped body, the pressure element can be provided with a profiling, so that transverse forces are not removed by the rod-shaped connecting element only in the transverse force load in the connection area, but also on the pressure element.
Bevorzugt ist ferner ein Druckelement mit zylindrischer oder scheibenförmiger Gestalt, das koaxial auf dem stabförmigen Verbindungselement sitzt. Auf diese Weise ist ein äußerst kompakter Knotenaufbau verwirklicht, der es erlaubt, auch mehrere Stabtragglieder im Knotenpunkt zusammen zu führen, ohne dass diese sich gegenseitig behindern. Also preferred is a pressure element with a cylindrical or disc-shaped shape, which sits coaxially on the rod-shaped connecting element. In this way, an extremely compact node structure is realized, which allows to lead several rod support members in the node together, without these interfere with each other.
Eine andere Ausführungsform sieht vor, anstelle des Druckrings eine erhärtbaren Another embodiment provides, instead of the pressure ring, a hardenable
Vergussmasse in einen entsprechenden Hohlraum einzubringen, die Vergussmasse nach dem Abbinden also das Druckelement bildet. Dies hat den Vorteil, dass sich die Apply potting compound in a corresponding cavity, the potting compound thus forms the pressure element after setting. This has the advantage that the
Vergussmasse den lokalen geometrischen Gegebenheiten im Knotenpunkt anpasst und daher in der Lage ist, fertigungs- oder montagebedingte Toleranzen auszugleichen. Die Vergussmasse kann dabei im abgebundenen Zustand die gleichen Materialeigenschaften aufweisen wie das Druckelement. Potting compound adapts to the local geometric conditions in the hub and therefore is able to compensate for manufacturing or assembly-related tolerances. The potting compound can have the same material properties in the set condition as the pressure element.
Eine weitere Ausführungsform der Erfindung kombiniert die beiden vorbeschriebenen Lösungen und deren Vorteile, indem ein Druckring zwischen Stabtragglied und Formkörper angeordnet ist, der zugleich den Hohlraum für die Vergussmasse mitbildet. Another embodiment of the invention combines the two above-described solutions and their advantages by a pressure ring between the rod support member and molded body is arranged, which also forms the cavity for the potting compound at the same time.
Zur Herstellung einer starren völlig schlupffreien Verbindung zwischen erstem Stabtragglied und Formkörper sind die Verbindungselemente vorzugsweise in die Bohrungen eingeklebt oder eingeschraubt. Kurze Beschreibung der Zeichnungen: To produce a rigid, completely slip-free connection between the first rod support member and the molded body, the connecting elements are preferably glued or screwed into the bores. Brief description of the drawings:
Die Erfindung wird nachstehend anhand in den Zeichnungen dargestellter The invention will be illustrated below with reference to the drawings
Ausführungsbeispiele näher erläutert, wobei weitere Merkmale und Vorteile der Erfindung offenbar werden. Für gleiche oder funktionsgleiche Merkmale werden dabei gleiche Embodiments explained in more detail, wherein further features and advantages of the invention will become apparent. For the same or functionally identical characteristics are the same
Bezugszeichen verwendet, soweit dies vorteilhaft erscheint. Used reference numerals, as far as this appears advantageous.
Es zeigt It shows
Fig. 1 einen Vertikalschnitt durch eine erste Ausführungsform der Erfindung, 1 is a vertical section through a first embodiment of the invention,
Fig. 2 eine Schrägansicht auf die in Fig. 1 dargestellte Ausführungsform der Erfindung, FIG. 2 shows an oblique view of the embodiment of the invention shown in FIG. 1, FIG.
Fig. 3 einen Teillängsschnitt durch eine zweite Ausführungsform der Erfindung, 3 is a partial longitudinal section through a second embodiment of the invention,
Fig. 4 eine Schrägansicht auf eine dritte Ausführungsform der Erfindung, 4 is an oblique view of a third embodiment of the invention,
Fig. 5 eine Schrägansicht auf den in Fig. 4 dargestellten Formkörper, 5 is an oblique view of the molding shown in Fig. 4,
Fig. 6 eine Schrägansicht auf eine vierte Ausführungsform der Erfindung, 6 is an oblique view of a fourth embodiment of the invention,
Fig. 7 eine Schrägansicht des in Fig. 6 dargestellten Formkörpers einschließlich Fig. 7 is an oblique view of the molding shown in Fig. 6 including
stabförmiger Verbindungselemente,  rod-shaped connecting elements,
Fig. 8 einen Schnitt durch die in Fig. 6 dargestellte Ausführungsform, und die Fig. 8 is a section through the embodiment shown in Fig. 6, and the
Fig. 9 und 10 jeweils einen Schnitt durch weitere Ausführungsformen der Erfindung mit einer innenliegenden Vergussmasse im Anschlussbereich. 9 and 10 each show a section through further embodiments of the invention with an internal potting compound in the connection area.
Wege zur Ausführung der Erfindung und gewerbliche Verwertbarkeit: Ways to carry out the invention and commercial usability:
Die Fig. 1 und 2 zeigen eine erste Ausführungsform eines erfindungsgemäßen Anschlusses eines ersten Stabtragglieds 1 an ein zweites Stabtragglied 2. Das Stabtragglied 1 stellt eine Diagonalstrebe dar, deren Längsachse 3 in einem Winkel α zur Längsachse 4 des zweiten Stabtragglieds 2, zum Beispiel einer Stütze, verläuft. Im Schnittpunkt der Längsachse 3 des ersten Stabtragglieds 1 mit der Umfangsfläche 5 des zweiten Stabtragglieds 2 ist ein Formkörper 6 angeordnet, der in Fig. 2 in größerem Maßstab in einer Schrägansicht dargestellt ist. 1 and 2 show a first embodiment of a connection according to the invention of a first bar support member 1 to a second bar support member 2. The bar support member 1 represents a diagonal strut whose longitudinal axis 3 at an angle α to the longitudinal axis 4 of the second bar support member 2, for example a support , runs. At the intersection of the longitudinal axis 3 of the first bar support member 1 with the peripheral surface 5 of the second bar support member 2 is a Shaped body 6, which is shown in Fig. 2 on a larger scale in an oblique view.
Der Formkörper 6 ist als monolithischer Gusskörper 2 ausgebildet und besitzt etwa Keilform. Im vorliegenden Ausführungsbeispiel besteht der Formkörper 6 aus Polymerbeton, setzt sich also zusammen aus einem mineralischen Zuschlag und einer Polymermatrix als Bindemittel, wobei diese Mischung gegebenenfalls noch Fasern zur Bewehrung und The molded body 6 is formed as a monolithic cast body 2 and has approximately wedge shape. In the present embodiment, the molded body 6 consists of polymer concrete, so is composed of a mineral aggregate and a polymer matrix as a binder, this mixture optionally fibers for reinforcement and
Festigkeitssteigerung enthalten kann. Andere Materialien wie zum Beispiel Metall, Keramik, hochfester Beton und dergleichen liegen ebenfalls im Rahmen der Erfindung. Strength increase may contain. Other materials such as metal, ceramic, high strength concrete and the like are also within the scope of the invention.
Der Formkörper 6 weist eine erste Krafteinleitungsfläche 7 auf, die senkrecht zur The molded body 6 has a first force introduction surface 7 which is perpendicular to
Längsachse 3 des ersten Stabtragglieds 1 verläuft. Im vorliegenden Ausführungsbeispiel besitzt die erste Krafteinleitungsfläche 7 Kreisform, sie kann aber auch jede andere beliebige Form annehmen, beispielsweise quadratisch oder rechteckförmig ausgebildet sein. Im Schnittpunkt der Längsachse 3 mit der ersten Krafteinleitungsfläche 7 ist ein zylindrischer Hohlraum 8 vorgesehen, der parallel zur Längsachse 3 verläuft und blind im Formkörper 6 endet. Die erste Krafteinleitungsfläche 7 dient als Auflager für das erste Stabtragglied 1. Longitudinal axis 3 of the first bar support member 1 extends. In the present embodiment, the first force introduction surface 7 has a circular shape, but it can also take any other arbitrary shape, for example, be square or rectangular. At the intersection of the longitudinal axis 3 with the first force introduction surface 7, a cylindrical cavity 8 is provided, which runs parallel to the longitudinal axis 3 and ends blindly in the molded body 6. The first force introduction surface 7 serves as a support for the first bar support member 1.
An seiner dem zweiten Stabtragglied 2 zugeordneten Seite besitzt der Formkörper 6 eine zweite Krafteinleitungsfläche 9, die vollflächig am Umfang 5 des zweiten Stabtragglieds 2 anliegt. Die zweite Krafteinleitungsfläche 9 besitzt im vorliegenden Ausführungsbeispiel rechteckförmigen Grundriss und verläuft im Falle eines Rundholzes als zweites Stabtragglied 2 gekrümmt und im Falle eines Kantholzes als zweites Stabtragglied 2 plan. Die On its side which is assigned to the second bar support member 2, the shaped body 6 has a second force introduction surface 9, which rests completely on the circumference 5 of the second bar support member 2. In the present exemplary embodiment, the second force introduction surface 9 has a rectangular ground plan and, in the case of a round timber, runs curved as a second bar support member 2 and, in the case of a square timber, as a second bar support member 2. The
Krafteinleitungsfläche 9 kann mit einer Profilierung versehen sein, um zur Steigerung der übertragbaren Kraft eine Verzahnung mit dem Umfang 5 des zweiten Stabtragglieds 2 herbeizuführen. Im Schnittpunkt der Längsachse 3 mit der zweiten Krafteinleitungsfläche 9 sieht man eine Vertiefung 10 mit vorzugsweise zylindrischer Gestalt. Force introduction surface 9 may be provided with a profiling in order to bring about a toothing with the circumference 5 of the second rod support member 2 to increase the transferable force. At the intersection of the longitudinal axis 3 with the second force introduction surface 9 can be seen a recess 10 having a preferably cylindrical shape.
Die Mantelfläche des Formkörpers 6 ergibt sich im Wesentlichen aus der Gesamtheit aller die erste Krafteinleitungsfläche 7 und zweite Krafteinleitungsfläche 9 verbindenden The lateral surface of the shaped body 6 results essentially from the entirety of all the first force introduction surface 7 and second force introduction surface 9 connecting
Mantellinien. Daraus resultiert eine räumlich konvexe Form des Formkörpers 6. Surface lines. This results in a spatially convex shape of the shaped body 6.
Darüber hinaus ist ein erfindungsgemäßer Formkörper 6 von zwei in etwa parallelen Kanälen 11 durchsetzt, die sich ausgehend von der zwischen erster Krafteinleitungsfläche 7 und zweiter Krafteinleitungsfläche 9 liegenden Umfangsfläche 12 zur zweiten In addition, an inventive shaped body 6 is penetrated by two approximately parallel channels 11, which, starting from the lying between the first force introduction surface 7 and second force introduction surface 9 peripheral surface 12 to the second
Krafteinleitungsfläche 9 erstrecken und dabei mit senkrecht zur Längsachse 3 gerichtetem Verlauf auf Höhe der Vertiefung 10 oder höher enden. Die Kanäle 1 1 dienen der Aufnahme und Führung von nicht dargestellten Befestigungsmitteln. Force introduction surface 9 extend and thereby directed perpendicular to the longitudinal axis 3 Course ends at the height of the recess 10 or higher. The channels 1 1 serve to receive and guide fasteners, not shown.
Wie aus Fig. 1 ersichtlich, liegt der Formkörper 6 im bestimmungsgemäßen Gebrauch mit der zweiten Krafteinleitungsfläche 9 vollflächig am Umfang 5 des zweiten Stabtragglieds 2 an. Dabei gewährleistet ein nagelartig in das zweite Stabtragglied 2 eingetriebener, mit seinem Kopf formschlüssig in die Vertiefung 10 eingreifender Zentrierdorn 15 die As can be seen from FIG. 1, the molded body 6 lies in its intended use with the second force introduction surface 9 over its entire surface on the circumference 5 of the second rod support member 2. This ensures a nail-like driven into the second rod support member 2, with its head positively engaging in the recess 10 centering mandrel 15 the
bestimmungsgemäße relative Lage des Formkörpers 6 gegenüber dem zweiten intended relative position of the shaped body 6 relative to the second
Stabtragglied 2. Die lastaufnehmenden Befestigungsmittel sind in den Fig. 1 und 2 nicht dargestellt, bestehen jedoch aus hochfesten Schraubbolzen, die sich durch die Kanäle 11 hindurch erstrecken und mit ihrem Gewindeabschnitt jeweils in das Vollholz des zweiten Stabtragglieds 2 reichen. Um die von den Befestigungsmitteln ausgehende Sprengwirkung zu vermindern, können die Kanäle 11 von in den Formkörper 6 eingebetteten Hülsen gebildet sein. Zusätzlich kann das zweite Stabtragglied 2 an seinem Umfang eine axial wirkende Anschlagfläche aufweisen, die die zur Längsachse 4 parallele Kraftkomponente aus dem Formkörper 6 aufnimmt. Bar support member 2. The load-bearing fastening means are not shown in Figs. 1 and 2, however, consist of high-strength bolts which extend through the channels 11 and extend with their threaded portion respectively in the solid wood of the second bar support member 2. In order to reduce the explosive effect emanating from the fastening means, the channels 11 may be formed by sleeves embedded in the shaped body 6. In addition, the second bar support member 2 may have at its periphery an axially acting abutment surface which receives the parallel to the longitudinal axis 4 force component from the shaped body 6.
Für den Anschluss des ersten Stabtragglieds 1 weist dessen der Krafteinleitungsfläche 7 zugeordnetes Ende eine ausgehend von dessen Stirnseite 16 sich koaxial zur Längsachse 3 erstreckende Sacklochbohrung 17 auf, die beispielsweise 15 cm in das erste Stabtragglied 1 hinein reichen kann. Der Durchmesser der Sachlochbohrung 17 entspricht vorzugsweise dem des zylindrischen Hohlraums 8 im Formkörper 6. For the connection of the first bar support member 1, the force introduction surface 7 associated with the end of a starting from the end face 16 coaxially to the longitudinal axis 3 extending blind hole 17, which may extend for example 15 cm in the first bar support member 1 into it. The diameter of the blind hole 17 preferably corresponds to that of the cylindrical cavity 8 in the molded body 6.
Die Sacklochbohrung 17 überschneidet sich mit einer ebenfalls von der Stirnseite 16 ausgehenden und sich koaxial zur Längsachse 3 erstreckende kreiszylindrischen The blind hole 17 intersects with a likewise extending from the end face 16 and extending coaxially to the longitudinal axis 3 circular cylindrical
Ausnehmung 18 mit einem im Vergleich zur Bohrung 17 größeren Durchmesser und geringerer axialer Tiefe. Zusammen ergeben die Sacklochbohrung 17 und die Recess 18 with a larger diameter compared to the bore 17 and lower axial depth. Together, the blind hole 17 and the result
kreiszylindrische Ausnehmung 18 eine Art Stufenbohrung am Ende des ersten circular cylindrical recess 18 a kind of stepped bore at the end of the first
Stabtragglieds 1. Für die erfindungsgemäße Ausbildung des Knotenpunkts ist das Vorsehen der Ausnehmung 18 zwar vorteilhaft, aber nicht unbedingt notwendig. Ebenso könnte lediglich die Sacklochbohrung 17 in der Krafteinleitungsfläche 7 angeordnet sein. Bar support member 1. For the inventive design of the node, the provision of the recess 18 is indeed advantageous, but not essential. Likewise, only the blind hole 17 could be arranged in the force introduction surface 7.
Der Kraftschluss zwischen erstem Stabtragglied 1 und Formkörper 6 erfolgt über ein stabförmiges Verbindungselement 19, dessen eines Ende kraftschlüssig in der Bohrung 7 des ersten Stabtragglieds 1 und dessen anderes Ende kraftschlüssig in dem zylindrischen Hohlraum 8 im Formkörper 6 verankert ist, beispielsweise durch Kleben, Schrauben oder Einbetonieren. Das Verbindungselement 19 besteht im vorliegenden Beispiel aus einem Stahlstab mit profilierter Umfangsfläche, vorzugsweise mit einem umlaufenden Außengewinde, um die Kraftübertragung zwischen Verbindungselement 19 und erstem Stabtragglied 1 zu verbessern. Das schließt nicht aus, dass das Verbindungselement 19 in einer einfachen Ausführungsform auch eine glatte Oberfläche aufweisen kann. Neben Stahl als Werkstoff für das Verbindungselement 19 eignen sich auch Verbundwerkstoffe wie zum Beispiel glasfaser- oder kohlefaserverstärkte Kunststoffe, die sich als leicht und The frictional connection between the first rod support member 1 and molded body 6 via a rod-shaped connecting element 19, one end of which is non-positively anchored in the bore 7 of the first rod support member 1 and the other end non-positively in the cylindrical cavity 8 in the molded body 6, for example by gluing, screws or in concrete. The connecting element 19 consists in the present example of a Steel bar with profiled peripheral surface, preferably with a circumferential external thread to improve the power transmission between the connecting element 19 and the first bar support member 1. This does not exclude that the connecting element 19 may also have a smooth surface in a simple embodiment. In addition to steel as a material for the connecting element 19 are also composite materials such as glass fiber or carbon fiber reinforced plastics, which are easy and
korrosionsbeständig erweisen. corrosion resistant.
o  O
Ferner geht aus den Figuren 1 und 2 hervor, dass ein scheibenförmiges Druckelement 20 koaxial zur Achse 3 in die Ausnehmung 18 des ersten Stabtragglieds 1 eingesetzt und dabei vom Verbindungselement 19 axial durchsetzt ist. Die dem Formkörper 6 zugewandten Stirnseite 21 des Druckelements 20 bildet einen Überstand über die Stirnseite 16 des ersten Stabtragglieds 1 aus, mit dem Ziel, Druckkräfte über diese Stirnseite 21 in den Formkörper 6 einzuleiten. Das Druckelement 20 besteht aus einem Material mit duktilen Eigenschaften, z.B. aus einem geeigneten Elastomer oder aus einem Kunststoff mit elastischem und/oder plastischem Verhalten.  Furthermore, it can be seen from FIGS. 1 and 2 that a disk-shaped pressure element 20 is inserted coaxially with the axis 3 into the recess 18 of the first bar support member 1 and is axially penetrated by the connecting element 19. The molded body 6 facing end face 21 of the pressure element 20 forms a projection on the end face 16 of the first rod support member 1, with the aim to initiate compressive forces on this end face 21 in the molding 6. The pressure element 20 is made of a material with ductile properties, e.g. made of a suitable elastomer or of a plastic with elastic and / or plastic behavior.
Zur Lastabtragung wirken das stabförmige Verbindungselement 19 und das Druckelement 20 zusammen, wobei Zugkräfte vom Verbindungselement 19, Druckkräfte gemeinsam vom Verbindungselement 19 und Druckelement 20, Querkräfte vom Verbindungselement 19 und Biegemomente gemeinsam vom Verbindungselement 19 und Druckelement 20 For load transfer, the rod-shaped connecting element 19 and the pressure element 20 act together, wherein tensile forces from the connecting element 19, compressive forces together by the connecting element 19 and pressure element 20, transverse forces from the connecting element 19 and bending moments together from the connecting element 19 and pressure element 20th
aufgenommen werden. Besitzt das Druckelement 20 elastische Eigenschaften, so werden kleine Verdrehungen um die Längsachse des Verbindungselements 19 zugelassen. Im Zusammenwirken von Verbindungselement 19 und elastischem Druckelement 20 ergibt sich ein Federsystem, dessen Federsteifigkeit über den Durchmesser, die Dicke und die be recorded. If the pressure element 20 has elastic properties, small twists about the longitudinal axis of the connecting element 19 are permitted. The interaction of connecting element 19 and elastic pressure element 20 results in a spring system whose spring stiffness over the diameter, the thickness and the
Materialsteifigkeit des Druckelements 20 eingestellt werden. Material rigidity of the pressure element 20 can be adjusted.
Fig. 3 zeigt die Umsetzung der Erfindung an einem Fachwerkträger, von dem lediglich ein Längsabschnitt dargestellt ist. Sowohl Obergurt als auch Untergurt des Fachwerkträgers werden jeweils von einem zweiten Stabtragglied 2 gebildet, die mittels der als Fig. 3 shows the implementation of the invention on a truss girder, of which only a longitudinal section is shown. Both upper flange and lower flange of the truss girder are each formed by a second truss member 2, which by means of the
Diagonalstreben wirkenden Stabtragglieder 1 und 1' verbunden sind. Diagonal struts acting bar support members 1 and 1 'are connected.
Zum Anschluss der diagonal verlaufenden Stabtragglieder 1 liegt es - wenn auch nicht zeichnerisch dargestellt - im Rahmen der Erfindung, deren Enden jeweils mittels eines Formkörpers 6 entsprechend der Figuren 1 und 2 an die zweiten Stabtragglieder 2 anzuschließen. Dabei würden in einem Knotenpunkt jeweils zwei Formkörper 6 mit umgekehrter Ausrichtung bezüglich der Längsachse 4 der zweiten Stabtragglieder 2 unmittelbar benachbart zueinander angeordnet sein. For connecting the diagonally extending bar support members 1 it is - although not shown in the drawing - within the scope of the invention to connect the ends of each of which by means of a shaped body 6 according to Figures 1 and 2 to the second bar support members 2. In this case, two moldings 6 would in each case with a node reverse orientation with respect to the longitudinal axis 4 of the second bar support members 2 may be arranged immediately adjacent to each other.
Um den Anschlussbereich kompakter zu gestalten, sieht die in Fig. 3 dargestellte To make the connection area more compact, the illustrated in Fig. 3
Ausführungsform der Erfindung einen Formkörper 6' vor, der sich aus einer geometrischen Verschmelzung zweier Formkörper 6 gemäß der Figuren 1 und 2 ergibt, deren erste Embodiment of the invention, a molding 6 'before, resulting from a geometric fusion of two moldings 6 according to Figures 1 and 2, the first
Krafteinleitungsflächen 7 entgegengesetzt ausgerichtet sind. Auf diese Weise ergibt sich eine spiegelbildliche Ausbildung des Formkörpers 6 bezüglich der senkrecht zur Längsachse 4 verlaufenden Symmetrieebene 22. Force introduction surfaces 7 are aligned opposite. In this way, a mirror image of the shaped body 6 with respect to the plane perpendicular to the longitudinal axis 4 symmetry plane 22 results.
Der auf diese Weise zustande kommende Formkörper 6' besitzt eine im Vergleich zur Ausführungsform gemäß den Figuren 1 und 2 vergrößerte zweite Krafteinleitungsfläche 9, die zur Anlage und Kraftüberleitung in das zweite Stabtragglied 2 dient, eine erste The resulting in this way shaped body 6 'has a comparison with the embodiment according to Figures 1 and 2 enlarged second force introduction surface 9, which serves for conditioning and force transfer into the second rod support member 2, a first
Krafteinleitungsfläche 7 zum Anschluss des ersten Stabtragglieds 1 und eine weitere Force introduction surface 7 for connecting the first rod support member 1 and another
Krafteinleitungsfläche 7', die bezüglich der Symmetrieebene 22 spiegelbildlich zur ersten Krafteinleitungsfläche 7 angeordnet ist. Force introduction surface 7 ', which is arranged with respect to the plane of symmetry 22 mirror image of the first force introduction surface 7.
Hinsichtlich des Anschlusses der Stabtragglieder 1 an die erste Krafteinleitungsfläche 7 bzw. weitere Krafteinleitungsfläche T sowie der Stabtragglieds 2 an die zweite With regard to the connection of the rod support members 1 to the first force introduction surface 7 or further force introduction surface T and the rod support member 2 to the second
Krafteinleitungsfläche 9 gelten die in den Figuren 1 und 2 gemachten Ausführungen sinngemäß, so dass um Wiederholungen zu vermeiden, auf die dortigen Ausführungen Bezug genommen wird. Force introduction surface 9 apply the statements made in Figures 1 and 2 mutatis mutandis, so that in order to avoid repetition, reference is made to the statements there.
Die Ausführungsformen gemäß der Figuren 1 bis 3 offenbaren Formkörper 6, 6', bei denen die erste Krafteinleitungsfläche 7 bzw. 7' und die zweite Krafteinleitungsfläche 9 The embodiments according to FIGS. 1 to 3 disclose molded bodies 6, 6 'in which the first force introduction surface 7 or 7' and the second force introduction surface 9
unterschiedlicher Art sind, da die Krafteinleitungsflächen 7, 7' senkrecht zum Different types are because the force introduction surfaces 7, 7 'perpendicular to
anzuschließenden Stabtragglied 1 verläuft und die Krafteinleitungsfläche 9 parallel zum Stabtragglied 2. to be connected bar support member 1 extends and the force introduction surface 9 parallel to the bar support member second
Davon unterscheiden sich die Ausführungsformen gemäß den Figuren 4 bis 7, indem die Krafteinleitungsflächen 7, 7', 7", 7"' der Formkörper 6", 6"' alle vom gleichen Typ sind, bei dem die Krafteinleitungsfläche 7, 7', 7", 7"' senkrecht zur Faser des anzuschließenden Stabtragglieds ausgerichtet sind. This differs from the embodiments according to FIGS. 4 to 7 in that the force introduction surfaces 7, 7 ', 7 ", 7"' of the shaped bodies 6 ", 6" 'are all of the same type, in which the force introduction surface 7, 7', 7 ", 7" 'are aligned perpendicular to the fiber of the rod support to be connected.
Die in den Figuren 4 und 5 offenbarte Ausführungsform der Erfindung zeigt einen The disclosed in Figures 4 and 5 embodiment of the invention shows a
Formkörper 6", der am oberen Ende eines als Stütze dienenden ersten Stabtragglieds 1 dient. An den Formkörper 6" sind vier weitere Stabtragglieder 1', 1", 1"', 1 "" angeschlossen, die beispielsweise die Streben einer Dach- oder Deckenkonstruktion bilden. Der Anschluss der Stabtragglieder 1 , 1', 1", 1"', 1"" erfolgt über die vom Formkörper 6" gebildeten Shaped body 6 ", which serves at the upper end of a first bar support member 1 serving as a support, is connected to the shaped body 6" by four further bar support members 1 ', 1 ", 1"', 1 "", for example, the struts of a roof or ceiling construction form. The connection of the bar support members 1, 1 ', 1 ", 1"', 1 "" via the molded body 6 "formed
Krafteinleitungsflächen 7, 7', 7", 7"' die jeweils senkrecht zur Längsachse 3 der ihnen zugeordneten Stabtragglieder 1 , 1', 1", 1"', 1 "" verlaufen. Der zug- druckkraftfeste und Anschluss der einzelnen Stabtragglieder 1 , 1', 1", 1"', 1"" an den Formkörper 6" erfolgt mittels eines stabförmigen Verbindungselemente 9 und eines Druckelements 20 und entspricht somit sinngemäß dem unter den Figuren 1 , 2 und 3 beschriebenen Anschluss des ersten Stabtragglieds 1 an den Formkörper 6. Um Wiederholungen zu vermeiden, wird auf die dortigen Ausführungen verwiesen. Force introduction surfaces 7, 7 ', 7 ", 7"' each perpendicular to the longitudinal axis 3 of their associated bar support members 1, 1 ', 1 ", 1"', 1 "" run. The tension-pressure-resistant and connection of the individual bar support members 1, 1 ', 1 ", 1"', 1 "" to the shaped body 6 "is effected by means of a rod-shaped connecting elements 9 and a pressure element 20 and thus corresponds mutatis mutandis to those in the figures 1, 2nd and 3 described connection of the first rod support member 1 to the molded body 6. In order to avoid repetition, reference is made to the statements there.
Gegenstand der Figuren 6 und 7 ist eine vierte Ausführungsform einer erfindungsgemäßen Knotenausbildung, die zeigt, dass auch räumlich komplexe Stabkonstruktionen mit der Erfindung realisierbar sind. Die Besonderheit dieser Ausführungsform besteht darin, dass im Anschlussbereich der Stabtragglieder 1 , 1', 1", 1"' an den Formkörper 6"' besonders gut Biegemomente übertragen werden können. The subject matter of FIGS. 6 and 7 is a fourth embodiment of a knot formation according to the invention, which shows that spatially complex rod constructions can also be realized with the invention. The peculiarity of this embodiment is that in the connection region of the bar support members 1, 1 ', 1 ", 1"' to the shaped body 6 "'particularly good bending moments can be transmitted.
Der Formkörper 6'" besteht aus einem scheibenartigen, mehrfach gekrümmten Körper, an den aus unterschiedlichen Raumrichtungen 23, 23', 23", 23"', 23"" ankommende The molded body 6 '"consists of a disk-like, multi-curved body, to which from different spatial directions 23, 23', 23", 23 "', 23" "arriving
Stabtragglieder 1 , 1', 1", 1 "' anschließen. Zu diesem Zweck besitzt der Formkörper 6"' Krafteinleitungsflächen 7, 7', 7", 7"' mit rechteckförmigem Grundriss, wobei jede Rod support members 1, 1 ', 1 ", 1"' connect. For this purpose, the molded body 6 "'has force introduction surfaces 7, 7', 7", 7 "'with a rectangular plan, each
Krafteinleitungsfläche 7, 7', 7", 7"' seitlich beabstandete achsparallele zylindrische Force introduction surface 7, 7 ', 7 ", 7"' laterally spaced axially parallel cylindrical
Hohlräume 8 aufweist, die jeweils zur Aufnahme stabförmiger Verbindungselemente 19, 19' dienen. Has cavities 8, which each serve to receive rod-shaped connecting elements 19, 19 '.
Die Stabtragglieder 1 , 1', 1", 1"' besitzen ebenfalls einen rechteckförmigen Querschnitt, der dem Umriss der Krafteinleitungsflächen 7, 7', 7", 7"' entspricht. In die Stirnseiten 16, 16', 16" 16"', 16"" der Stabtragglieder 1 , 1', 1", 1'" sind jeweils zwei Sacklochbohrungen eingebracht, deren Anordnung der der stabförmigen Verbindungselemente 19, 19' entspricht und die zur Aufnahme derselben dienen. Die Herstellung des in Figur 6 dargestellten fertigen Knotens geschieht durch Zusammenfügen der Stabtragglieder 1 , 1', 1", 1"' mit dem Formkörper 6"', wobei die stabförmigen Verbindungselemente 19, 19' sowohl in den Hohlräumen 8 im The bar support members 1, 1 ', 1 ", 1"' also have a rectangular cross-section which corresponds to the outline of the force introduction surfaces 7, 7 ', 7 ", 7"'. In the end faces 16, 16 ', 16 "16"', 16 "" of the bar support members 1, 1 ', 1 ", 1'" are each introduced two blind holes, whose arrangement corresponds to the rod-shaped connecting elements 19, 19 'and the To serve the same. The production of the finished knot shown in Figure 6 is done by joining the bar support members 1, 1 ', 1 ", 1"' with the molded body 6 "', wherein the rod-shaped connecting elements 19, 19' both in the cavities 8 in
Formkörper 6"' als auch in den Sacklochbohrungen der Stabtragglieder 1 , 1', 1", 1"' verankert sind. Shaped body 6 "'and in the blind holes of the bar support members 1, 1', 1", 1 "'are anchored.
Nicht dargestellt, aber im Rahmen der Erfindung liegend ist eine Ergänzung dieser Not shown, but within the scope of the invention is a supplement of this
Ausführungsform durch ein Druckelement, das, wie unter den Figuren 1 bis 5 beschrieben, die stabförmigen Verbindungselemente 19, 19' umgreifend zwischen der Stirnseite 16 und der Krafteinleitungsfläche 7 angeordnet ist. Das Druckelement kann dabei einteilig ausgebildet sein und von beiden Verbindungselementen 19, 19' durchsetzt sein oder aus zwei getrennten Teilen bestehen, von denen jeweils ein Teil einem Verbindungselement 19 oder 19' zugeordnet ist bzw. diese ringartig umgreift. Dabei kann das Druckelement in Vertiefungen in den Krafteinleitungsflächen angeordnet sein oder zwischen plan Embodiment by a pressure element which, as described in Figures 1 to 5, the rod-shaped connecting elements 19, 19 'encompassing between the end face 16 and the force introduction surface 7 is arranged. The pressure element may be formed in one piece and be penetrated by two connecting elements 19, 19 'or consist of two separate parts, of which in each case a part is associated with a connecting element 19 or 19' or surrounds them like a ring. In this case, the pressure element may be arranged in recesses in the force introduction surfaces or between plan
verlaufenden Krafteinleitungsflächen. extending force introduction surfaces.
Die Figuren 8 bis 10 betreffen konstruktive Variationen des Anschlussbereichs zwischen einem ersten Stabtragglied 1 und Formkörper 6, die für alle der vorbeschriebenen Figures 8 to 10 relate to constructive variations of the connection area between a first bar support member 1 and mold body 6, for all of the above
Ausführungsformen gelten. Embodiments apply.
In Fig. 8 sieht man das knotenseitige Ende eines ersten Stabtragglieds 1, dessen In Fig. 8 shows the node-side end of a first bar support member 1, whose
Längsachse wiederum mit 3 bezeichnet ist. Das erste Stabtragglied 1 endet mit einer lotrecht zur Achse 3 verlaufenden Stirnseite 16, die eine koaxiale Ausnehmung 18 aufweist. Vom Grund der Ausnehmung 18 erstrecken sich achsparallel zur Achse 3 zwei Longitudinal axis is again denoted by 3. The first bar support member 1 ends with a perpendicular to the axis 3 extending end face 16, which has a coaxial recess 18. From the bottom of the recess 18 extend axially parallel to the axis 3 two
Sacklochbohrungen 17, 17'. Blind holes 17, 17 '.
Der Stirnseite 16 axial gegenüberliegend ist die Krafteinleitungsfläche 7 des Formkörpers 6 dargestellt. Die Krafteinleitungsfläche 7 ist ebenfalls senkrecht zur Achse 3 ausgerichtet und weist eine der Ausnehmung 18 axial gegenüberliegende Vertiefung 24 auf, von deren Grund aus zwei achsparallele zylindrische Hohlräume 8, 8' in den Formkörper 6 reichen. Die Hohlräume 8, 8' fluchten dabei axial mit den Sacklochbohrungen 17, 17'. The end face 16 axially opposite the force introduction surface 7 of the shaped body 6 is shown. The force introduction surface 7 is also aligned perpendicular to the axis 3 and has a recess 18 axially opposite recess 24, from the bottom of two axially parallel cylindrical cavities 8, 8 'rich in the molding 6. The cavities 8, 8 'are aligned axially with the blind bores 17, 17'.
Stabförmige Verbindungselemente 19, 19' sind mit ihrem einen Ende in die Rod-shaped connecting elements 19, 19 'are with their one end in the
Sacklochbohrungen 17, 17' und mit ihrem anderen Ende in die Hohlräume 8, 8' eingesetzt und dort verankert, beispielsweise verklebt oder verschraubt. Der von der Ausnehmung 18 und Vertiefung 24 gemeinsam gebildete Raum 25 dient der formschlüssigen Aufnahme eines Druckelements 20. Insofern unterscheidet sich diese Ausführungsform gegenüber der in den Figuren 1 bis 3 beschriebenen im Wesentlichen durch die Anordnung eines zweiten stabförmigen Verbindungselemente 19', was den Knoten besonders dazu befähigt, auch Biegemomente aufzunehmen, wobei das eine stabförmige Verbindungselement als Blind holes 17, 17 'and inserted with its other end into the cavities 8, 8' and anchored there, for example glued or screwed. The space 25 formed jointly by the recess 18 and recess 24 serves for the positive reception of a pressure element 20. Insofar this embodiment differs from that described in FIGS. 1 to 3 essentially by the arrangement of a second rod-shaped connecting element 19 ', which is particularly advantageous for the node capable of taking also bending moments, which is a rod-shaped connecting element as
Druckstab und das andere stabförmige Verbindungselement als Zugstab wirkt. Push rod and the other rod-shaped connecting element acts as a pull rod.
Aus der in Fig. 9 dargestellten Variante geht hervor, dass die Stirnseite 16 des ersten Stabtragglieds 1 und die Krafteinleitungsfläche 7 des Formkörpers 6 unter Kontakt flächig aneinander liegen und von einem stabförmigen Verbindungselement 19 zusammengehalten sind. Der von Ausnehmung 18 und Vertiefung 24 gebildete Raum 25 dient bei dieser Variante zur Aufnahme einer erhärtbaren Vergussmasse 26, die nachträglich in den Raum 25 injiziert wird. Zu diesem Zweck ist im Endbereich des ersten Stabtragglieds 1 ein schräg radial verlaufender Injektionskanal 27 angeordnet, der in der zylindrischen Ausnehmung 18 endet, sowie ein radial verlaufender Entlüftungskanal 28, der vom Raum 25 zum From the variant shown in Fig. 9 it is apparent that the end face 16 of the first rod support member 1 and the force introduction surface 7 of the molding 6 lie flat against each other under contact and are held together by a rod-shaped connecting element 19. The space 25 formed by recess 18 and recess 24 is used in this Variant for receiving a hardenable potting compound 26, which is subsequently injected into the space 25. For this purpose, an obliquely radially extending injection channel 27 is arranged in the end region of the first rod support member 1, which ends in the cylindrical recess 18, and a radially extending vent channel 28, from the space 25 to
Außenumfang des ersten Stabtragglieds 1 führt. Nach ihrem Aushärten bildet die Outside circumference of the first bar support member 1 leads. After curing, the forms
Vergussmasse 26 das Druckelement, mit der in der Anschlussfuge Querkräfte und in axialer Richtung Druckkräfte übertragen werden. Potting compound 26 the pressure element with which transverse forces are transmitted in the connecting joint and compressive forces in the axial direction.
Die in Fig. 10 dargestellte Variante zeigt eine Kombination der Ausführungsform gemäß Fig. 9 mit einem Druckelement 20' zwischen erstem Stabtragglied 1 und Formkörper 6. Das Druckelement 20' besitzt ringförmige Gestalt und ist koaxial in radial lichtem Abstand zum stabförmigen Verbindungselement 19 angeordnet. Der für die Vergussmasse 26 bestimmte Raum 25 wird somit von der zylindrischen Ausnehmung 18, der Vertiefung 24 und dem Druckelement 20' gebildet, wozu der Innenumfang des Druckelements 20' mit den The variant shown in Fig. 10 shows a combination of the embodiment of FIG. 9 with a pressure element 20 'between the first rod support member 1 and molded body 6. The pressure element 20' has an annular shape and is arranged coaxially in radially clear distance from the rod-shaped connecting element 19. The specific space for the potting compound 25 25 is thus formed by the cylindrical recess 18, the recess 24 and the pressure element 20 ', including the inner periphery of the pressure element 20' with the
Umfangsflächen der Ausnehmung 18 und der Vertiefung 24 fluchtet. Im Bereich des Peripheral surfaces of the recess 18 and the recess 24 is aligned. In the area of
Druckelements 20' erstreckt sich ein radialer Injektionskanal 27 in den Raum 25 hinein. Der dazugehörige Entlüftungskanal 28 erstreckt sich ebenfalls in radialer Richtung vom Raum 25 zum Außenumfang des ersten Stabtragglieds 1. Pressure element 20 ', a radial injection channel 27 extends into the space 25 inside. The associated vent channel 28 also extends in the radial direction from the space 25 to the outer periphery of the first rod support member first
Die Erfindung ist nicht auf die in den einzelnen Ausführungsformen beschriebenen The invention is not limited to those described in the individual embodiments
Merkmalskombinationen beschränkt, sondern umfasst ebenso Kombinationen von Combinations of features limited, but also includes combinations of
Merkmalen unterschiedlicher Ausführungsformen, soweit sich diese dem Fachmann ohne weiteres erschließen. Features of different embodiments, as far as they are readily apparent to those skilled in the art.

Claims

Patentansprüche: claims:
1. Stabkonstruktion aus Holz mit einem ersten Stabtragglied (1) und mit mindestens einem weiteren Stabtragglied (V, 1", 1"', 1"', 2), die in einem Knotenpunkt 1. Bar construction made of wood with a first bar support member (1) and with at least one further bar support member (V, 1 ", 1" ', 1 "', 2), in a node
kraftschlüssig miteinander verbunden sind, wozu im Bereich des Knotenpunkts ein Formkörper (6, 6', 6", 6"') angeordnet ist, der eine erste Krafteinleitungsfläche (7) zum Anschluss des ersten Stabtragglieds (1) und mindestens eire zweite  in the region of the nodal point a shaped body (6, 6 ', 6 ", 6"') is arranged, which has a first force introduction surface (7) for connecting the first rod support member (1) and at least eire second
Krafteinleitungsfläche (7', 7", 7'", 7"', 9) zum Anschluss des weiteren Stabtragglieds (1\ 1", 1 ", 1 ", 1 "", 2) aufweist, dadurch gekennzeichnet, dass  Force introduction surface (7 ', 7 ", 7'", 7 "', 9) for connecting the further rod support member (1 \ 1", 1 ", 1", 1 "", 2), characterized in that
- die erste Krafteinleitungsfläche (7) senkrecht zur Längsachse (3) des ersten  - The first force introduction surface (7) perpendicular to the longitudinal axis (3) of the first
Stabtragglieds (1) verläuft,  Bar support member (1) runs,
- in dem Formkörper (6, 6', 6", 6"') ausgehend von der ersten Krafteinleitungsfläche (7) koaxial oder achsparallel zur Längsachse (3) des ersten Stabtragglieds (1) mindestens ein zylindrischer Hohlraum (8) angeordnet ist,  - in the molded body (6, 6 ', 6 ", 6"') starting from the first force introduction surface (7) coaxially or axially parallel to the longitudinal axis (3) of the first rod support member (1) at least one cylindrical cavity (8) is arranged,
- in dem der ersten Krafteinleitungsfläche (7) zugewandten Ende des ersten  - In the first force introduction surface (7) facing the end of the first
Stabtragglieds (1) mindestens eine zur Längsachse (3) des ersten Stabtragglieds (1) koaxiale oder achsparallele Bohrungen (17) angeordnet ist, und  Bar support member (1) at least one to the longitudinal axis (3) of the first rod support member (1) coaxial or axially parallel holes (17) is arranged, and
- sowohl in dem mindestens einen zylindrischen Hohlraum (8) im Formkörper (6, 6', 6", 6"') als auch in der mindestens einen Bohrung (17) im ersten Stabtragglied (1) ein stabförmiges Verbindungselement (19) jeweils kraftschlüssig verankert ist.  - In both the at least one cylindrical cavity (8) in the molded body (6, 6 ', 6 ", 6"') and in the at least one bore (17) in the first rod support member (1) a rod-shaped connecting element (19) each non-positively is anchored.
2. Stabkonstruktion nach Anspruch 1 , dadurch gekennzeichnet, dass zwischen der ersten Krafteinleitungsfläche (7) und dem Ende des ersten Stabtragglieds (1) ein kraftübertragendes Druckelement (20) angeordnet ist. 2. Rod construction according to claim 1, characterized in that between the first force introduction surface (7) and the end of the first rod support member (1) a force-transmitting pressure element (20) is arranged.
3. Stabkonstruktion nach Anspruch 2, dadurch gekennzeichnet, dass das Ende des ersten Stabtragglieds (1) eine sich axial erstreckende Ausnehmung (18) aufweist, in der das Druckelement (20) angeordnet ist. 3. Bar construction according to claim 2, characterized in that the end of the first bar support member (1) has an axially extending recess (18) in which the pressure element (20) is arranged.
4. Stabkonstruktion nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass das 4. Bar construction according to claim 2 or 3, characterized in that the
Druckelement (20) aus einem starren Material oder einem Material mit elastischen oder duktilen Eigenschaften gebildet ist, vorzugsweise aus einem Elastomer.  Pressure element (20) is formed of a rigid material or a material having elastic or ductile properties, preferably made of an elastomer.
5. Stabkonstruktion nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass das Druckelement (20) an den kraftübertragenden Flächen eine Profilierung aufweist. 5. Bar construction according to one of claims 2 to 4, characterized in that the pressure element (20) has a profiling on the force-transmitting surfaces.
6. Stabkonstruktion nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass das Druckelement (20) als Zylinder oder als Scheibe ausgebildet ist und axial von dem stabförmigen Verbindungselement (19) durchsetzt ist. 6. Bar construction according to one of claims 2 to 5, characterized in that the pressure element (20) is designed as a cylinder or as a disk and is axially penetrated by the rod-shaped connecting element (19).
7. Stabkonstruktion nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das stabförmige Verbindungselement (19) in eine oder beide Bohrungen (17, 17') eingeklebt, eingeschraubt oder eingegossen ist. 7. Rod construction according to one of claims 1 to 6, characterized in that the rod-shaped connecting element (19) in one or both holes (17, 17 ') glued, screwed or cast.
8. Stabkonstruktion nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die zweite Krafteinleitungsfläche (7', 7", 7"', 7"") analog der ersten 8. Bar construction according to one of claims 1 to 7, characterized in that the second force introduction surface (7 ', 7 ", 7"', 7 "") analogous to the first
Krafteinleitungsfläche (7) nach einem der Ansprüche 1 bis 7 ausgebildet ist.  Force introduction surface (7) is designed according to one of claims 1 to 7.
9. Stabkonstruktion nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die zweite Krafteinleitungsfläche (9) parallel zur Längsachse (4) des zweiten 9. bar construction according to one of claims 1 to 7, characterized in that the second force introduction surface (9) parallel to the longitudinal axis (4) of the second
Stabtragglieds (2) verläuft und am Umfang (5) des zweiten Stabtragglieds (2) angeordnet ist.  Bar support member (2) extends and on the circumference (5) of the second bar support member (2) is arranged.
10. Stabkonstruktion nach Anspruch 9, dadurch gekennzeichnet, dass in der von zweiter Krafteinleitungsfläche (9) und zweitem Stabtragglied (2) gebildeten Kontaktfläche Formschlussmittel zur gegenseitigen Zentrierung angeordnet sind. 10. Bar construction according to claim 9, characterized in that in the second force introduction surface (9) and second bar support member (2) formed contact surface interlocking means are arranged for mutual centering.
11. Stabkonstruktion nach Anspruch 10, dadurch gekennzeichnet, dass die 11. Rod construction according to claim 10, characterized in that the
Formschlussmittel einen Zentrierdorn (15) am zweiten Stabtragglied (2) umfassen, der in eine Vertiefung (10) in der zweiten Krafteinleitungsfläche (9) eingreift.  Forming means comprise a centering pin (15) on the second rod support member (2) which engages in a recess (10) in the second force introduction surface (9).
12. Stabkonstruktion nach einem der Ansprüche 9 bis 11 , gekennzeichnet durch 12. Bar construction according to one of claims 9 to 11, characterized by
Spannmittel, die den Formköper (6, 6') durchdringen und sich im Bereich der zweiten Krafteinleitungsfläche (9) in das zweite Stabtragglied (2) hinein erstrecken.  Clamping means which penetrate the shaped body (6, 6 ') and extend in the region of the second force introduction surface (9) into the second bar support member (2).
13. Stabkonstruktion nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, dass das zweite Stabtragglied (2) an seinem Umfang eine axial wirkende Anschlagfläche aufweist, die mit einer axial wirkenden Anschlagfläche am Formkörper (6, 6') zusammenwirkt. 13. Bar construction according to one of claims 9 to 12, characterized in that the second bar support member (2) has at its periphery an axially acting abutment surface which cooperates with an axially acting abutment surface on the shaped body (6, 6 ').
14. Stabkonstruktion nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass der Formkörper (6, 6', 6"', 6"') als monolithischer Gusskörper ausgebildet ist. 14. Bar construction according to one of claims 1 to 13, characterized in that the shaped body (6, 6 ', 6 "', 6"') is designed as a monolithic cast body.
15. Stabkonstruktion nach Anspruch 14, dadurch gekennzeichnet, dass der Formkörper (6, 6', 6", 6"') Bewehrungselemente aufweist, vorzugsweise Bewehrungsfasern. 15. Rod construction according to claim 14, characterized in that the shaped body (6, 6 ', 6 ", 6"') has reinforcing elements, preferably reinforcing fibers.
16. Stabkonstruktion nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass der Formkörper (6, 6', 6", 6"') aus Kaltkeramik, Kunststoff, Metall, Beton, Mineralguss, vorzugsweise Polymerbeton oder hochfestem Beton besteht. 16. Bar construction according to one of claims 1 to 15, characterized in that the shaped body (6, 6 ', 6 ", 6"') consists of cold ceramics, plastic, metal, concrete, mineral casting, preferably polymer concrete or high-strength concrete.
17. Stabkonstruktion nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass das erste Stabtragglied (1) mit mehreren stabförmigen Verbindungselementen (19, 19') mit dem Formkörper (6, 6', 6", 6"') verbunden ist, vorzugsweise mit zwei oder drei Verbindungselementen (19, 19'). 17. Bar construction according to one of claims 1 to 16, characterized in that the first bar support member (1) with a plurality of rod-shaped connecting elements (19, 19 ') with the shaped body (6, 6', 6 ", 6" ') is connected, preferably with two or three connecting elements (19, 19 ').
18. Stabkonstruktion nach einem der Ansprüche 1 bis 17, dadurch gekennzeichnet, dass der Formkörper (6) im Bereich der ersten Anschlussfläche (7) eine der stirnseitigen Ausnehmung (18) im ersten Stabtragglied (1) axial gegenüberliegende Ausnehmung (24) aufweist, wobei der durch die beiden Ausnehmungen (18, 24) gebildete 18. Bar construction according to one of claims 1 to 17, characterized in that the shaped body (6) in the region of the first connection surface (7) one of the frontal recess (18) in the first rod support member (1) axially opposite recess (24), wherein formed by the two recesses (18, 24)
Gesamthohlraum (25) mit einer erhärtbaren Vergussmasse (26) ausgefüllt ist.  Whole cavity (25) is filled with a hardenable potting compound (26).
19. Stabkonstruktion nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, dass zwischen der ersten Anschlussfläche (7) und dem Ende des ersten Stabtragglieds (1) ein ringförmiges Druckelement (20') angeordnet ist und der Bereich radial innerhalb des Druckelements (20') mit einer erhärtbaren Vergussmasse (26) ausgefüllt ist. 19. Rod construction according to one of claims 1 to 18, characterized in that between the first connection surface (7) and the end of the first rod support member (1) an annular pressure element (20 ') is arranged and the region radially within the pressure element (20'. ) is filled with a hardenable potting compound (26).
20. Stabkonstruktion nach Anspruch 18 oder 19, dadurch gekennzeichnet, dass die 20. Bar construction according to claim 18 or 19, characterized in that the
Vergussmasse nach ihrem Erhärten starr ist oder elastische, elasto-plastische oder duktile Eigenschaften besitzt.  Potting compound is rigid after its hardening or has elastic, elasto-plastic or ductile properties.
EP14705708.7A 2013-02-08 2014-02-08 Wooden strut construction comprising a first strut support member and at least one second strut support member, said members being force-locked together at a node point Active EP2954124B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013002105.7A DE102013002105A1 (en) 2013-02-08 2013-02-08 Bar construction made of wood with a first bar support member and at least one second second bar support member which are non-positively connected to each other in a node
PCT/EP2014/000348 WO2014121946A1 (en) 2013-02-08 2014-02-08 Wooden strut construction comprising a first strut support member and at least one second strut support member, said members being force-locked together at a node point

Publications (2)

Publication Number Publication Date
EP2954124A1 true EP2954124A1 (en) 2015-12-16
EP2954124B1 EP2954124B1 (en) 2018-01-31

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Application Number Title Priority Date Filing Date
EP14705708.7A Active EP2954124B1 (en) 2013-02-08 2014-02-08 Wooden strut construction comprising a first strut support member and at least one second strut support member, said members being force-locked together at a node point

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Country Link
EP (1) EP2954124B1 (en)
DE (1) DE102013002105A1 (en)
WO (1) WO2014121946A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190161957A1 (en) * 2016-06-27 2019-05-30 Loggo Ip Pty Ltd Apparatus and Methods For Connecting Timber Flanges
DE102019132272A1 (en) * 2019-11-28 2021-06-02 Seele Group Gmbh CONNECTING NODES FOR A BAR CONSTRUCTION AND BAR CONSTRUCTION WITH SUCH A CONNECTING NODE

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Publication number Priority date Publication date Assignee Title
AT340112B (en) * 1975-10-02 1977-11-25 Rosenberger Gertrude BAR CONNECTION FOR CREATING SPATIAL BAR WORKS
DE2847545A1 (en) * 1978-11-02 1980-05-22 Siegfried Plocher Wooden bar metal joint device - has flat steel plates welded on stop face on metal connecting piece
DE3026689C2 (en) * 1980-07-15 1982-08-12 Mero-Raumstruktur GmbH & Co Würzburg, 8700 Würzburg Junction connection for wooden bars of trusses, especially space trusses
NL8703076A (en) * 1987-12-18 1989-07-17 Pieter De Jong WOOD CONNECTION.
DE4341490A1 (en) * 1993-12-06 1995-06-08 Peter Bertsche Connection system
DE10027430C2 (en) * 2000-06-02 2002-04-18 Walter Stumpf Connecting node elements and connecting rods for the construction of rod-node space trusses
DE202007014884U1 (en) * 2007-10-25 2008-01-03 Bohrenkämper, Gustav connecting fitting

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Title
See references of WO2014121946A1 *

Also Published As

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DE102013002105A1 (en) 2014-08-14
WO2014121946A1 (en) 2014-08-14
EP2954124B1 (en) 2018-01-31

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