EP1869264B1 - Framework grid system - Google Patents
Framework grid system Download PDFInfo
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- EP1869264B1 EP1869264B1 EP06743294A EP06743294A EP1869264B1 EP 1869264 B1 EP1869264 B1 EP 1869264B1 EP 06743294 A EP06743294 A EP 06743294A EP 06743294 A EP06743294 A EP 06743294A EP 1869264 B1 EP1869264 B1 EP 1869264B1
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- elements
- grid system
- framework
- girder grid
- girder
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- 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
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/22—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material with parts being prestressed
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/14—Load-carrying floor structures formed substantially of prefabricated units with beams or girders laid in two directions
Definitions
- the present invention relates to a truss girder grid system with individual truss elements made of concrete, with a top chord and a bottom chord and diagonals as oblique pressure and / or tension bars or with a disc between upper and lower chord, the truss elements spatially in the form of a Carrier rust are arranged together.
- Truss frame systems according to the invention are used as roofs or ceiling systems, often also in combination with suitable ceiling panels.
- the individual truss elements are made separately and then firmly connected. The connection often happens by means of complicated node pieces, which provide a firm connection between the individual truss elements. Often also additional tensioning cables are used, which are guided by supports and thereby hold the individual truss elements or relieve the node pieces.
- the disadvantage here is a very costly design of the node pieces and an additional space required for suspending the individual truss elements.
- the achievable spans are also relatively low, so that a variety of supports or suspensions is required to hold the carrier grid system.
- FR 1560631 A discloses a support grid system according to the preamble of claim 1.
- Task is therefore to provide a truss girder system, which is composed of several truss elements and is very easy to manufacture and assemble.
- At least one biasing element is arranged in the upper and lower flange of the truss elements.
- the biasing elements extend through at least two truss elements and are biased so that occurring shear forces between the truss elements can be transmitted by overpressing the joint between the truss elements (1).
- the truss elements are individually connected to each other at the contact surfaces, for example by screws. They hold alone by the biasing elements, which press the two truss elements together.
- the truss elements can thereby be supported at their ends, without they move to their contact surfaces or the system sags inadmissible. In this way, many individual truss elements can be connected to each other, without support posts or suspensions are required at each junction.
- the items made of concrete are spatially strung together and clamped together by a subsequently introduced bias.
- the subsequent pretensioning of the upper and lower straps in both directions ensures the load capacity of the spatial system.
- the degree of bias is chosen so high that the shear forces can be transmitted in the overpressed joints. Due to the resulting spatial bearing effect, it is possible to subsequently offset the supports of the support system.
- the supports can be arranged in particular at the nodes of the support grate.
- the truss elements are arranged linearly one behind the other or in the nodes also branched. At the junctions, two, three or four truss elements meet. At a corresponding Training the node and leadership of the biasing elements, but it is also possible to juxtapose several truss elements.
- the dimensioning of the individual cross-sections and component dimensions is to be determined by a specially prepared static so that all occurring forces and load conditions are removed.
- the individual elements are made of concrete, for example in accordance with DIN 1045-1 - DIN 1045-4.
- a node piece is arranged.
- the truss elements consist of identical parts.
- the node pieces allow a branch of the truss elements to form a carrier grid.
- the node piece offers a contact surface for each truss element to be arranged and thus enables a defined arrangement of the individual truss elements together with the interposition of the node piece.
- knot pieces for corners of the carrier grate with two arranged truss elements, knot pieces for edge regions be provided with contact surfaces for three truss elements and node pieces for inner regions with contact surfaces for four or each for more truss elements.
- the biasing elements pass through at least one node piece.
- the contact pressure of the adjacent truss elements to the node piece can hereby be done very effectively by the subsequent tensioning of the biasing elements.
- clamping devices are provided at the ends of the carrier grid or at node pieces, which are arranged at the edge of the truss grid system. These clamping devices can fix, for example with wedges, the prestressed prestressing element.
- a biasing elements are particularly steel cables or threaded rods, which are arranged through the upper and lower flange of the aligned truss elements through.
- biasing elements made of carbon fiber or other materials can be used advantageously.
- cladding tubes or recesses are arranged in the upper and lower flange of the truss elements. Through these cladding tubes or recesses, the biasing elements are guided and allow the compression of the individual truss elements, optionally with interposed node pieces.
- each node piece is advantageously designed as support posts or from a support post supported. With a corresponding design of the system, it is not necessary that each node piece is also a support. Depending on the preload and design of the truss elements and node pieces, large spans can be bridged without support posts.
- the biasing force can be less than if no profiling is provided.
- the profiling is advantageously made very precise and the profiling has positive and negative shape elements which interlock and thus form a kind of teeth.
- the truss element has edge posts at its ends, this produces a very stable truss element which forms a defined contact surface and thus creates a firm and stable connection of the individual truss elements directly or indirectly with the interposition of knots.
- a truss element advantageously consists of a top flange, bottom flange, edge posts and diagonals.
- the diagonals of a truss element can be variably arranged. This means that the diagonals can be arranged as oblique tensile and pressure diagonals, as printed diagonals with vertical tension posts or as tension diagonals with vertical pressure posts. Depending on the field of application and required carrying capacity, the respective training may prove advantageous. Instead of the diagonal or post can also be arranged a disc between the upper and lower belt.
- the truss girder system has fewer contact surfaces which must be connected together by means of the pretension elements.
- the system can thereby be made even more stable, but in this way more specialized truss elements are required to form a kit with which almost any support grids can be put together.
- the knot and the support posts may be advantageous to use a steel reinforcement, high strength or ultra high strength concrete or concrete mixed with fibers of steel, plastic or other kind of material. Even self-compacting concrete has proven to be particularly advantageous for a fast and reliable production of the individual components.
- the truss element, the knot or the support post made of lightweight concrete, so especially in the use of lightweight concrete for the truss element even the weight to keep particularly low, whereby the bridged length can be made larger than when using a conventional concrete.
- FIG. 1 shows a perspective plan view of a section of a truss-grid system, which is composed of a plurality of individual truss elements 1.
- the individual truss elements 1 are connected to each other by means of knot pieces 2.
- supports 10 are provided, which are arranged below a node piece 2 or have integrated a corresponding node piece 2.
- the supports 10 are arranged at long intervals, ie only after every fifth truss element 1 again follows a support 10.
- the large spans of the truss girder system are caused by the bias, which run in Obergurt and Untergut the respective truss elements 1.
- the supports 10 can also be a suspension of the framework-carrier grid system carried by a not shown higher arranged support system.
- FIG. 2 a perspective view of a single truss element 1 is shown.
- the truss element 1 consists of a top flange 3 and a bottom flange 4 and two edge posts 5 and a plurality of diagonals 6.
- In the upper flange 3 and the lower flange 4 each have two biasing elements 7 and 8.
- the biasing elements 7 and 8 extend in a line through the mutually aligned truss elements 1 of the truss girder system according to FIG. 1 ,
- the individual truss elements 1 are pressed against each other or pressed against the node pieces 2. This creates a stable support grid system, which can be stretched by overpressing the thrust forces occurring over extremely high spans.
- the diagonals 6 are shown here by way of example as oblique pressure and Buchdiagonalen. But they can also be designed so that they work together as a draw or Druckdiagonalen in conjunction with vertical tension or pressure posts in a known manner.
- FIG. 2 illustrated tubular openings in which the biasing elements are guided, can also be provided that recesses in the upper chords 3 and lower chords 4 are arranged, in which the biasing elements 7 and 8 extend. It is essential that a compressive force can be exerted on the end faces of the truss element 1, whereby the thrust forces between the truss elements or the truss elements and the knot pieces can be transmitted by overpressing the joint between the truss elements 1.
- FIG. 3 a section of a junction in perspective view is shown.
- Four truss elements abut on contact surfaces 9 with their end faces against a node piece 2.
- the four truss elements 1 Connected are the four truss elements 1 with the biasing elements 7 in the upper chords 3 and the biasing elements 8 in the lower chords 4.
- Each two biasing elements 7 and 8 extend in the upper chords 3 and the lower chords 4 in one direction. Orthogonal thereto extend two further biasing elements 7 and 8 to a compound of the other two truss elements 1, which to curse each other, to create. If a biasing force is introduced into the biasing elements 7 and 8, the truss elements 1 are pressed against the node piece 2 and thus cause a stable structure.
- the node piece 2 can be supported by means of a support 10, if necessary, to support the truss girder system.
- FIG. 4 shows a schematic diagram of a profiling 11 an end face of the truss element 1.
- the profiling is in addition to the biasing force contributed to the fact that the transmission of shear forces of the truss-grid system is reliable.
- a corresponding corresponding profiling is provided on the contact surfaces 9 of the node piece 2.
- the profiling is in the form of positively and negatively emerging from the contact surface 9 elevations or depressions.
- the profiling 11 can be done in a clear shape, but also in a kind of micro-profiling. It is essential that the biasing force which press the truss elements 1 against each other or against the node piece 2 is supported. By profiling 11 can also be done in addition some stabilization in the lateral direction of the truss element 1.
- the individual truss elements 1 and 2 knot pieces After juxtaposing the individual truss elements 1 and 2 knot pieces, the individual components are clamped together by a subsequently introduced bias in the upper flange 3 and lower flange 4. The entire system is sustainable after toughening. Finally, the truss girder system can be assembled as an overall system, i. For example, be placed on the supports 10.
- the present invention is not limited to the illustrated embodiments.
- the tensioning of the biasing elements 7 and 8 takes place with a known clamping device, which is usually arranged at the respective end of a series of truss elements and knot pieces.
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Abstract
Description
Die vorliegende Erfindung betrifft ein Fachwerk-Trägerrost-System mit einzelnen Fachwerkelementen aus Beton, mit einem Obergurt und einem Untergurt sowie mit Diagonalen als schräge Druck- und/oder Zugstäbe oder mit einer Scheibe zwischen Ober- und Untergurt, wobei die Fachwerkelemente räumlich in Form eines Trägerrostes aneinander angeordnet sind.The present invention relates to a truss girder grid system with individual truss elements made of concrete, with a top chord and a bottom chord and diagonals as oblique pressure and / or tension bars or with a disc between upper and lower chord, the truss elements spatially in the form of a Carrier rust are arranged together.
Erfindungsgemäße Fachwerk-Trägerrost-Systeme werden als Dächer oder Deckensysteme, häufig auch in Kombination mit geeigneten Deckenplatten, eingesetzt. Die einzelnen Fachwerkelemente werden dabei separat hergestellt und anschließend fest miteinander verbunden. Die Verbindung geschieht häufig mittels komplizierter Knotenstücke, welche eine feste Verbindung zwischen den einzelnen Fachwerkelementen schaffen. Oft werden auch noch zusätzliche Spannseile verwendet, welche über Stützen geführt werden und dadurch die einzelnen Fachwerkelemente halten beziehungsweise die Knotenstücke entlasten. Nachteilig hierbei ist eine sehr kostenintensive Ausführung der Knotenstücke und ein zusätzlicher Raumbedarf zum Abhängen der einzelnen Fachwerkelemente. Die erzielbaren Stützweiten sind darüber hinaus relativ gering, so daß eine Vielzahl von Stützen oder Abhängungen erforderlich ist um das Trägerrost-System zu halten.Truss frame systems according to the invention are used as roofs or ceiling systems, often also in combination with suitable ceiling panels. The individual truss elements are made separately and then firmly connected. The connection often happens by means of complicated node pieces, which provide a firm connection between the individual truss elements. Often also additional tensioning cables are used, which are guided by supports and thereby hold the individual truss elements or relieve the node pieces. The disadvantage here is a very costly design of the node pieces and an additional space required for suspending the individual truss elements. The achievable spans are also relatively low, so that a variety of supports or suspensions is required to hold the carrier grid system.
Aufgabe ist es daher, ein Fachwerk-Trägerrost-System zu schaffen, welches aus mehreren Fachwerkelementen zusammengesetzt ist und sehr einfach herstellbar und montierbar ist.Task is therefore to provide a truss girder system, which is composed of several truss elements and is very easy to manufacture and assemble.
Die Aufgabe wird gelöst mit einem Fachwerk-Trägerrost-System mit den Merkmalen des Patentanspruchs 1.The object is achieved with a framework-carrier grid system with the features of
Erfindungsgemäß ist in dem Ober- und Untergurt der Fachwerkelemente jeweils mindestens ein Vorspannelement angeordnet. Die Vorspannelemente verlaufen durch mindestens zwei Fachwerkelemente und sind derart vorgespannt, daß auftretende Schubkräfte zwischen den Fachwerkelementen durch Überdrücken der Fuge zwischen den Fachwerkelementen (1) übertragen werden können. Hierdurch ist es nicht mehr erforderlich, daß die Fachwerkelemente an den Kontaktflächen einzeln, beispielsweise durch Schrauben, miteinander verbunden werden. Sie halten alleine durch die Vorspannelemente zusammen, welche die beiden Fachwerkelemente aneinander pressen. Die Fachwerkelemente können hierdurch an ihren Enden unterstützt werden, ohne daß sie sich an ihren Kontaktflächen verschieben oder das System unzulässig durchhängt. Auf diese Weise können viele einzelne Fachwerkelemente miteinander verbunden werden, ohne daß an jeder Verbindungsstelle Stützpfosten oder Abhängungen erforderlich sind.According to the invention, in each case at least one biasing element is arranged in the upper and lower flange of the truss elements. The biasing elements extend through at least two truss elements and are biased so that occurring shear forces between the truss elements can be transmitted by overpressing the joint between the truss elements (1). As a result, it is no longer necessary that the truss elements are individually connected to each other at the contact surfaces, for example by screws. They hold alone by the biasing elements, which press the two truss elements together. The truss elements can thereby be supported at their ends, without they move to their contact surfaces or the system sags inadmissible. In this way, many individual truss elements can be connected to each other, without support posts or suspensions are required at each junction.
Zum Aufbau des Systems werden die aus Beton hergestellten Einzelteile räumlich aneinandergereiht und durch eine nachträglich eingebrachte Vorspannung miteinander verspannt. Hierdurch entsteht ein räumliches Trägerrost-System aus Fachwerkelementen. Die nachträgliche Vorspannung der Ober- und Untergurte in beiden Richtungen gewährleistet die Tragfähigkeit des räumlichen Systems. Der Grad der Vorspannung wird dabei so hoch gewählt, daß die Schubkräfte in den überdrückten Fugen übertragen werden können. Aufgrund der so entstehenden räumlichen Tragwirkung besteht die Möglichkeit, die Stützen des Tragsystems auch nachträglich zu versetzen. Die Stützen können insbesondere an den Knotenpunkten des Trägerrostes angeordnet werden. Die Fachwerkelemente sind linear hintereinander oder in den Knotenpunkten auch verzweigt angeordnet. In den Knotenpunkten treffen zwei, drei oder vier Fachwerkelemente aneinander. Bei einer entsprechenden Ausbildung der Knoten und Führung der Vorspannelemente ist es aber auch möglich mehrere Fachwerkelemente aneinanderstoßen zu lassen.To build the system, the items made of concrete are spatially strung together and clamped together by a subsequently introduced bias. This creates a spatial grid system of truss elements. The subsequent pretensioning of the upper and lower straps in both directions ensures the load capacity of the spatial system. The degree of bias is chosen so high that the shear forces can be transmitted in the overpressed joints. Due to the resulting spatial bearing effect, it is possible to subsequently offset the supports of the support system. The supports can be arranged in particular at the nodes of the support grate. The truss elements are arranged linearly one behind the other or in the nodes also branched. At the junctions, two, three or four truss elements meet. At a corresponding Training the node and leadership of the biasing elements, but it is also possible to juxtapose several truss elements.
Die Dimensionierung der einzelnen Querschnitte und Bauteilabmessungen ist durch eine eigens dafür angefertigte Statik so zu bestimmen, daß alle auftretenden Kräfte und Lastzustände abgetragen werden. Die Einzelelemente werden aus Beton, beispielsweise gemäß DIN 1045-1 - DIN 1045-4 hergestellt.The dimensioning of the individual cross-sections and component dimensions is to be determined by a specially prepared static so that all occurring forces and load conditions are removed. The individual elements are made of concrete, for example in accordance with DIN 1045-1 - DIN 1045-4.
Zwischen den Fachwerkelementen ist ein Knotenstück angeordnet.Between the truss elements, a node piece is arranged.
Die Fachwerkelemente bestehen aus Gleichteilen. Die Knotenstücke ermöglichen eine Abzweigung der Fachwerkelemente zur Bildung eines Trägerrostes. Das Knotenstück bietet dabei für jedes anzuordnende Fachwerkelement eine Kontaktfläche und ermöglicht somit unter Zwischenschaltung des Knotenstückes ein definiertes Anordnen der einzelnen Fachwerkelemente aneinander. Es können beispielsweise Knotenstücke für Ecken des Trägerrostes mit zwei angeordneten Fachwerkelementen, Knotenstücke für Randbereiche mit Kontaktflächen für drei Fachwerkelemente und Knotenstücke für innere Bereiche mit Kontaktflächen für vier oder jeweils auch für mehr Fachwerkelemente vorgesehen sein.The truss elements consist of identical parts. The node pieces allow a branch of the truss elements to form a carrier grid. The node piece offers a contact surface for each truss element to be arranged and thus enables a defined arrangement of the individual truss elements together with the interposition of the node piece. For example, knot pieces for corners of the carrier grate with two arranged truss elements, knot pieces for edge regions be provided with contact surfaces for three truss elements and node pieces for inner regions with contact surfaces for four or each for more truss elements.
Die Vorspannelemente verlaufen durch mindestens ein Knotenstück. Die Anpressung der angrenzenden Fachwerkelemente an das Knotenstück kann hiermit sehr effektiv durch das nachträgliche Spannen der Vorspannelemente erfolgen. An einem Knotenstück, welches sich kreuzende Fachwerkelemente verbindet, ist darauf zu achten, daß die jeweiligen Vorspannelemente aneinander vorbei geführt werden, ohne sich zu behindern.The biasing elements pass through at least one node piece. The contact pressure of the adjacent truss elements to the node piece can hereby be done very effectively by the subsequent tensioning of the biasing elements. At a node piece, which connects intersecting truss elements, it is important to ensure that the respective biasing elements are guided past each other without hindering each other.
Zum Spannen der Vorspannelemente sind an den Enden des Trägerrostes beziehungsweise an Knotenstücken, welche am Rand des Fachwerk-Trägerrost-Systems angeordnet sind, Spanneinrichtungen vorgesehen. Diese Spanneinrichtungen können beispielsweise mit Keilen das vorgespannte Vorspannelement fixieren. Als Vorspannelemente eignen sich insbesondere Stahlseile oder Gewindestähle, welche durch den Ober- und Untergurt der miteinander fluchtenden Fachwerkelemente hindurch angeordnet sind. Alternativ können aber auch Vorspannelemente aus Kohlefaser oder anderen Materialien vorteilhaft eingesetzt werden.For tensioning the biasing elements clamping devices are provided at the ends of the carrier grid or at node pieces, which are arranged at the edge of the truss grid system. These clamping devices can fix, for example with wedges, the prestressed prestressing element. As a biasing elements are particularly steel cables or threaded rods, which are arranged through the upper and lower flange of the aligned truss elements through. Alternatively, however, biasing elements made of carbon fiber or other materials can be used advantageously.
Um den nachträglichen Einbau der Vorspannelemente zu ermöglichen, sind in dem Ober- und Untergurt der Fachwerkelemente Hüllrohre oder Aussparungen angeordnet. Durch diese Hüllrohre oder Aussparungen werden die Vorspannelemente geführt und ermöglichen das Zusammenpressen der einzelnen Fachwerkelemente, gegebenenfalls mit dazwischen angeordneten Knotenstücken.In order to enable the subsequent installation of the biasing elements, cladding tubes or recesses are arranged in the upper and lower flange of the truss elements. Through these cladding tubes or recesses, the biasing elements are guided and allow the compression of the individual truss elements, optionally with interposed node pieces.
Um das Fachwerk-Trägerrost-System zu tragen sind vorteilhafterweise einzelne Knotenstücke als Stützpfosten ausgebildet oder von einem Stützpfosten unterstützt. Bei einer entsprechenden Auslegung des Systems ist es aber nicht erforderlich, daß jedes Knotenstück auch eine Stütze ist. Je nach Vorspannung und Ausführung der Fachwerkelemente und Knotenstücke können große Spannweiten ohne Stützpfosten überbrückt werden.In order to carry the truss girder system, individual node pieces are advantageously designed as support posts or from a support post supported. With a corresponding design of the system, it is not necessary that each node piece is also a support. Depending on the preload and design of the truss elements and node pieces, large spans can be bridged without support posts.
An der Kontaktfuge des Fachwerkelements zu dem Knotenstück sind miteinander korrespondierende Profilierungen vorgesehen, so ist die Aufnahme der Schubkräfte in den Fugen besonders zuverlässig möglich. Die Vorspannkraft kann dabei geringer sein als wenn keine Profilierung vorgesehen ist. Die Profilierung ist vorteilhafterweise sehr präzise hergestellt und die Profilierung weist positive und negative Formelemente auf, welche ineinander greifen und damit eine Art Verzahnung bilden.At the contact joint of the truss element to the node piece corresponding profiles are provided, so the inclusion of the shear forces in the joints is particularly reliable possible. The biasing force can be less than if no profiling is provided. The profiling is advantageously made very precise and the profiling has positive and negative shape elements which interlock and thus form a kind of teeth.
Um eine besonders feste Verbindung an den Kontaktflächen zu erhalten ist vorteilhafterweise vorgesehen, daß in den Kontaktflächen zwischen den Fachwerkelementen und Knotenstücken oder Stützpfosten eine Fuge mit örtlichem Verguß mit Mörtel oder Kleber angeordnet ist. Durch das Vergießen der Fuge wird ein zusätzlicher Formschluß geschaffen, welcher die Schubkräfte übertragen kann. Sind vor dem örtlichen Verguß an den Kontaktflächen bereits Profilierungen vorgesehen, so wird hierdurch eine noch bessere Verbindung geschaffen.In order to obtain a particularly strong connection to the contact surfaces is advantageously provided that in the contact surfaces between the truss elements and node pieces or support posts a joint with local grout with mortar or adhesive is arranged. By casting the joint, an additional positive engagement is created, which can transmit the shear forces. If profilings are already provided on the contact surfaces in front of the local encapsulation, an even better connection is thereby created.
Weist das Fachwerkelement an seinen Enden Randpfosten auf, so wird hierdurch ein sehr stabiles Fachwerkelement geschaffen, welches eine definierte Kontaktfläche bildet und damit eine feste und stabile Verbindung der einzelnen Fachwerkelemente direkt oder indirekt unter Zwischenschaltung von Knotenstücken miteinander schafft.If the truss element has edge posts at its ends, this produces a very stable truss element which forms a defined contact surface and thus creates a firm and stable connection of the individual truss elements directly or indirectly with the interposition of knots.
Ein Fachwerkelement besteht vorteilhafterweise aus einem Obergurt, Untergurt, Randpfosten und den Diagonalen. Die Diagonalen eines Fachwerkelements können dabei variabel angeordnet werden. Das bedeutet, die Diagonalen können als schräge Zug- und Druckdiagonalen, als Druckdiagonalen mit senkrechten Zugpfosten oder als Zugdiagonalen mit senkrechten Druckpfosten angeordnet sein. Je nach Anwendungsgebiet und erforderlicher Tragfähigkeit können sich die jeweiligen Ausbildungen als vorteilhaft erweisen. Statt der Diagonalen bzw. Pfosten kann auch eine Scheibe zwischen Ober- und Untergurt angeordnet sein.A truss element advantageously consists of a top flange, bottom flange, edge posts and diagonals. The diagonals of a truss element can be variably arranged. This means that the diagonals can be arranged as oblique tensile and pressure diagonals, as printed diagonals with vertical tension posts or as tension diagonals with vertical pressure posts. Depending on the field of application and required carrying capacity, the respective training may prove advantageous. Instead of the diagonal or post can also be arranged a disc between the upper and lower belt.
Sind mehrere Fachwerkelemente und/oder ein Fachwerkelement mit einem Knotenstück monolithisch ausgebildet, so weist das Fachwerk-Trägerrost-System weniger Kontaktflächen auf, welche mittels der Vorspannelemente miteinder verbunden werden müssen. Das System kann hierdurch noch stabiler ausgebildet sein, allerdings sind hierdurch speziellere Fachwerkelemente erforderlich, um einen Baukasten zu bilden, mit welchem nahezu beliebige Trägerroste zusammengestellt werden können.If a plurality of truss elements and / or a truss element with a knot piece are monolithic, then the truss girder system has fewer contact surfaces which must be connected together by means of the pretension elements. The system can thereby be made even more stable, but in this way more specialized truss elements are required to form a kit with which almost any support grids can be put together.
Um die Fachwerkelemente, das Knotenstück und die Stützpfosten sehr stabil auszubilden, kann es vorteilhaft sein, eine Stahlarmierung beziehungsweise -bewehrung, hochfesten beziehungsweise ultrahochfesten Beton oder Beton, welcher mit Fasern aus Stahl, Kunstoff oder anders geartetem Material vermengt ist, zu verwenden. Auch selbstverdichtender Beton hat sich als besonders vorteilhaft für eine schnelle und zuverlässige Herstellung der einzelnen Bauteile erwiesen.To make the truss elements, the knot and the support posts very stable, it may be advantageous to use a steel reinforcement, high strength or ultra high strength concrete or concrete mixed with fibers of steel, plastic or other kind of material. Even self-compacting concrete has proven to be particularly advantageous for a fast and reliable production of the individual components.
Sind das Fachwerkelement, das Knotenstück oder der Stützpfosten aus Leichtbeton hergestellt, so ist insbesondere bei der Verwendung des Leichtbetons für das Fachwerkelement selbst das Eigengewicht besonders gering zu halten, wodurch die zu überbrückende Länge größer als bei Verwendung eines herkömmlichen Betons ausgeführt werden kann.If the truss element, the knot or the support post made of lightweight concrete, so especially in the use of lightweight concrete for the truss element even the weight to keep particularly low, whereby the bridged length can be made larger than when using a conventional concrete.
Weitere Vorteile der Erfindung sind in nachfolgenden Ausführungsbeispielen beschrieben. Es zeigt
-
Figur 1 - einen Ausschnitt eines Fachwerk-Trägerrost-Systems in perspek- tivischer Ansicht,
-
Figur 2 - ein Fachwerkelement,
-
Figur 3 - einen Knoten mit vier Fachwerkelementen,
-
Figur 4 - eine profilierte Stirnfläche eines Fachwerkelements.
- FIG. 1
- a section of a truss-girder system in perspective view,
- FIG. 2
- a truss element,
- FIG. 3
- a knot with four truss elements,
- FIG. 4
- a profiled end face of a truss element.
In
Die Diagonalen 6 sind hier beispielhaft als schräge Druck- und Zugdiagonalen dargestellt. Sie können aber auch so ausgeführt sein, daß sie als Zug- oder Druckdiagonalen in Verbindung mit senkrechten Zug- oder Druckpfosten in bekannter Weise zusammenarbeiten.The
Anstelle der in
In
Nach dem Aneinanderreihen der einzelnen Fachwerkelemente 1 und Knotenstücke 2 werden die Einzelbauteile durch eine nachträglich eingebrachte Vorspannung im Obergurt 3 und Untergurt 4 zusammengespannt. Das gesamte System ist nach dem Vorspannen tragfähig. Schließlich kann das Fachwerk-Trägerrost-System als Gesamtsystem montiert, d.h. beispielsweise auf die Stützen 10 gestellt werden.After juxtaposing the
Die vorliegende Erfindung ist nicht auf die dargestellten Ausführungen beschränkt. Das Anspannen der Vorspannelemente 7 und 8 erfolgt mit einer bekannten Spanneinrichtung, die meist am jeweiligen Ende einer Reihe von Fachwerkelementen und Knotenstücken angeordnet ist.The present invention is not limited to the illustrated embodiments. The tensioning of the
Claims (16)
- Girder grid system having individual elements (1) made of concrete,- having pretensioning elements (7,8) extending through at least two elements and pretensioned such that shear forces arising between the elements can be transferred by bridging the gap between the elements,- and a joint piece (2) is provided between the elements, through which the pretensioning elements (7,8) extend,characterized in that- the elements are framework elements (1) having a top flange (3) and a bottom flange (4) and having diagonals (6) as angled compression and/or tension members, or having a panel between the top and bottom flanges (3,4),- the framework elements (1) are spatially disposed adjacent to one another in the form of a girder grid,- at least one pretensioning element (7,8) is disposed in each of the top and bottom flange (3,4),- framework elements (1) of the girder grid are identical components,- the pretensioning elements (7,8) of the top and bottom flanges (3,4) are led past each other at a joint piece (2) connected crossing identical framework elements (1), wherein the top flanges (3) are disposed above the bottom flanges (4) in the crossing identical framework elements (1), and- profiles (11) corresponding to each other and having positive and negative form elements engaging in each other and thereby forming a type of dovetail connection are provided at a contact surface (9) of the framework element (1) to the joint piece (2).
- The girder grid system according to one of the preceding claims, characterized in that the pretensioning elements (7,8) are pretensioned at at least one end of the girder grid system.
- The girder grid system according, to one of the preceding claims, characterized in that sleeve tubes or recesses for subsequent installation of the pretensioning elements (7,8) are disposed in the top and bottom flange (3).
- The girder grid system according to one of the preceding claims, characterized in that individual joint pieces (2) are designed for supporting the loads of the framework girder grid system as supporting pillars (10), or are supported by a support post (10).
- The girder grid system according to one of the preceding claims, characterized in that the profiling brings about a stabilization in the lateral direction of the framework element (1).
- The girder grid system according to one of the preceding claims, characterized in that the profiling comprises a significant shaping or is a type of microprofiling.
- The girder grid system according to one of the preceding claims, characterized in that a particularly profiled gap having local grouting is disposed in the contact surfaces (9) between the framework elements (1) and joint pieces (2) or support posts (10).
- The girder grid system according to one of the preceding claims, characterized in that the framework element (1) comprises edge posts (5), at the ends thereof.
- The girder grid system according to one of the preceding claims, characterized in that the diagonals (6) are conceived as angled compression diagonals having vertical tension posts.
- The girder grid system according to one of the preceding claims, characterized in that the diagonals (6) are conceived as angled tension diagonals having vertical compression posts.
- The girder grid system according to one of the preceding claims, characterized in that a plurality of framework elements (1) and/or a framework element (1) having a joint piece (2) are designed monolithically.
- The girder grid system according to one of the preceding claims, characterized in that the framework element (1) and/or the joint piece (2) and/or the support post (10) comprise a steel reinforcement.
- The girder grid system according to one of the preceding claims, characterized in that the framework element (1) and/or the joint piece (2) and/or the support post (10) are made of high-strength or ultra high-strength concrete.
- The girder grid system according to one of the preceding claims, characterized in that the framework element (1) and/or the joint piece (2) and/or the support post (10) are made of concrete blended with fibers made of steel, plastic, or other types of material.
- The girder grid system according to one of the preceding claims, characterized in that the framework element (1) and/or the joint piece (2) and/or the support post (10) are made of self-compacting concrete.
- The girder grid system according to one of the preceding claims, characterized in that the framework element (1) and/or the joint piece (2) and/or the support post (10) are made of lightweight concrete.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005017366A DE102005017366A1 (en) | 2005-04-14 | 2005-04-14 | Truss girder grid system |
PCT/EP2006/061572 WO2006108867A1 (en) | 2005-04-14 | 2006-04-13 | Framework grid system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1869264A1 EP1869264A1 (en) | 2007-12-26 |
EP1869264B1 true EP1869264B1 (en) | 2011-04-13 |
Family
ID=36658921
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06743294A Not-in-force EP1869264B1 (en) | 2005-04-14 | 2006-04-13 | Framework grid system |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1869264B1 (en) |
AT (1) | ATE505602T1 (en) |
DE (2) | DE102005017366A1 (en) |
WO (1) | WO2006108867A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007037436A1 (en) * | 2007-08-08 | 2009-02-12 | MAX BÖGL Fertigteilwerke GmbH & Co. KG | Fire wall or complex separation wall e.g. for building made from pre-fabricated concrete elements, has several similar panels which are made from concrete precast and have horizontal part |
CN102888930A (en) * | 2011-07-18 | 2013-01-23 | 湖南邱则有专利战略策划有限公司 | Assembled type hollow grid plate floor system |
CN107035044A (en) * | 2017-05-19 | 2017-08-11 | 易筑集合(北京)科技有限公司 | A kind of light steel composite floor system structure bearing system |
CN107254917B (en) * | 2017-07-11 | 2022-08-09 | 浙江东南网架股份有限公司 | Super-large-span multi-order secondary prestressed steel truss structure and construction method thereof |
CN110821037A (en) * | 2019-12-20 | 2020-02-21 | 重庆交通大学 | T-shaped beam and box beam with fiber reinforced composite grid web |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE861315C (en) * | 1951-10-12 | 1952-12-29 | Gustav Schneider | Hollow stone for ceilings and walls |
DE1609806A1 (en) * | 1967-03-08 | 1970-04-30 | Roehle Dipl Ing Friedrich | Process for the production of prestressed concrete beams |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE85165C (en) * | ||||
FR992377A (en) * | 1944-06-24 | 1951-10-17 | Rigid floor in prefabricated elements | |
DE975592C (en) * | 1948-04-22 | 1962-02-01 | Dyckerhoff & Widmann Ag | Process for the production of a truss bridge made of reinforced concrete and movable scaffolding for carrying out the process |
DE869976C (en) * | 1948-10-02 | 1953-03-09 | Gollnow U Sohn J | Trusses, especially for bridge constructions, and procedures for their assembly |
DE921283C (en) * | 1948-10-02 | 1954-12-13 | Adolf Dr-Ing Koch | Construction element, in particular made of reinforced concrete, or auxiliary construction element made of another material with a joint that is resistant to bending, shear and torsion |
DE911329C (en) * | 1951-09-26 | 1954-05-13 | Max Gessner Dipl Ing Dipl Ing | Truss with reinforced concrete belts |
US2925727A (en) * | 1954-08-11 | 1960-02-23 | Gilbert Ash Ltd | Prestressed concrete floor, roof and like structures |
DE1193225B (en) * | 1956-03-17 | 1965-05-20 | Dyckerhoff & Widmann Ag | Reinforced concrete truss |
CH367963A (en) * | 1959-01-15 | 1963-03-15 | Ernst Dipl Ing Waelli | Process for the production of a carrier grate ceiling and carrier grate ceiling produced according to this method |
FR1560631A (en) * | 1968-02-09 | 1969-03-21 | ||
CH575524A5 (en) * | 1974-04-18 | 1976-05-14 | Peter Emil | |
DE2600602A1 (en) * | 1975-01-31 | 1976-08-05 | Betschart Anton Peter Dipl Ing | Floor slab support structure for multistorey buildings - has grid of beams with detachable connectors for beam members |
DE3114719C2 (en) * | 1981-04-11 | 1983-04-28 | Stahlwerke Peine-Salzgitter Ag, 3150 Peine | Truss |
DE3833202C2 (en) * | 1988-09-30 | 1994-04-14 | Dyckerhoff & Widmann Ag | Beam-like supporting element made of prestressed concrete |
DE4003207A1 (en) * | 1990-02-03 | 1991-08-08 | Heuer Michael Andree | Lightweight framework constructions - are made from series of interlocking and preferably similar components which are made of FRP with fibres suitably disposed to transmit loads |
DE4026008A1 (en) * | 1990-08-14 | 1992-02-20 | Harald Schmitt | Pretensioned components for bridge construction - comprise standard design of prefab reinforced concrete units adapted for assembly as bridges |
US6920728B2 (en) * | 2002-09-25 | 2005-07-26 | James M. Powers | Column and beam construction and method |
DE20309447U1 (en) * | 2003-06-18 | 2003-09-11 | Wec Turmbau Gmbh | Self-sealing concrete used as a transport concrete for concrete products comprises Portland cement, hard coal fly ash, a concrete liquefier, a flux additive and an accelerator |
-
2005
- 2005-04-14 DE DE102005017366A patent/DE102005017366A1/en not_active Withdrawn
-
2006
- 2006-04-13 AT AT06743294T patent/ATE505602T1/en active
- 2006-04-13 WO PCT/EP2006/061572 patent/WO2006108867A1/en not_active Application Discontinuation
- 2006-04-13 DE DE502006009300T patent/DE502006009300D1/en active Active
- 2006-04-13 EP EP06743294A patent/EP1869264B1/en not_active Not-in-force
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE861315C (en) * | 1951-10-12 | 1952-12-29 | Gustav Schneider | Hollow stone for ceilings and walls |
DE1609806A1 (en) * | 1967-03-08 | 1970-04-30 | Roehle Dipl Ing Friedrich | Process for the production of prestressed concrete beams |
Also Published As
Publication number | Publication date |
---|---|
EP1869264A1 (en) | 2007-12-26 |
DE502006009300D1 (en) | 2011-05-26 |
ATE505602T1 (en) | 2011-04-15 |
WO2006108867A1 (en) | 2006-10-19 |
WO2006108867A8 (en) | 2007-12-21 |
DE102005017366A1 (en) | 2006-10-19 |
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