EP0040815A2 - Site-assembled composite beam - Google Patents

Site-assembled composite beam Download PDF

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Publication number
EP0040815A2
EP0040815A2 EP81103888A EP81103888A EP0040815A2 EP 0040815 A2 EP0040815 A2 EP 0040815A2 EP 81103888 A EP81103888 A EP 81103888A EP 81103888 A EP81103888 A EP 81103888A EP 0040815 A2 EP0040815 A2 EP 0040815A2
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EP
European Patent Office
Prior art keywords
web
section
ceiling
composite
chord
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EP81103888A
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German (de)
French (fr)
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EP0040815A3 (en
EP0040815B1 (en
Inventor
Ulrich Fiergolla
Josef Rottmayr
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Individual
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Priority to AT81103888T priority Critical patent/ATE9020T1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
    • E04C3/294—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete of concrete combined with a girder-like structure extending laterally outside the element
    • 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
    • E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement

Definitions

  • the invention relates to a composite beam in assembly design as a rigid connection of prefabricated ceiling panels.
  • the steel structure consists of trusses with L-lower chords, e.g. U.S. Patent 19 79 643; 40 56 908, and DE-OS 21 23 351, or from honeycomb carriers according to US-PS 41 15 971.
  • the individual ceiling tiles are prefabricated in transportable sizes in the workshop and put together on the construction site to form a ceiling or a bridge.
  • the individual ceiling panels can be reinforced concrete panels or composite constructions with uniaxial steel constructions, the composite being carried out as in the local construction methods (DE-OS 21 53 495, US-PS 20 00 110).
  • Composite beams with prefabricated ceiling panels are known e.g. from the bridge construction.
  • prefabricated ceiling panels are screwed onto a double-T beam so that they are non-slipping (HV connection according to DIN 1050).
  • the plate joints are filled with in-situ concrete.
  • headed dowels or oarlocks are welded onto the top chord of a double-T beam in such a way that they protrude into recesses in the ceiling panels, which are filled with in-situ concrete. After the concrete has hardened in the panel joints and the recesses, a composite beam is available as a rigid connection for prefabricated ceiling panels. This type of design is also assumed in DE-AS 15 34 703 "ceiling construction in composite girder construction".
  • Such composite beams have various disadvantages. What they all have in common is that the shear connection between the belts by means of composite means, such as non-slip screwing or oarlocks, has a single cut and therefore requires a high amount of composite means.
  • the upper chord is weakened by individual recesses with inferior in-situ concrete filling or continuous loss of cross-section due to the space required for the screw connection.
  • This has a particularly disadvantageous effect on edge beams because a distribution of the upper chord force in the ceiling tile results in cross-sectional twisting of the composite beam.
  • the upper flange of the double-T profile is arranged under the ceiling panel in all of the above-mentioned designs, that is to say statically unfavorable and hardly used.
  • a specific disadvantage of the composite girder mentioned last is the interruption of the bending stiffness of the ceiling slab transverse to the composite girder axis, which is mandatory with this embodiment. This makes e.g. cantilevering the ceiling panels is not possible or only with additional effort.
  • the invention has for its object to provide a composite girder in assembly design as a rigid connection of prefabricated ceiling panels, which allows the necessary shear connection between the belts with less effort, which allows a statically better material utilization and which maintains the bending stiffness of the ceiling panels across the composite girder direction without additional effort.
  • this object is achieved according to the invention in that the top flange and the web are divided into sections, the length of which in is essentially equal to the width of the associated ceiling tile that the upper flange and a part of the web of each section adjacent to it are embedded in the prefabrication of the ceiling tile, and that during assembly the web parts of each section projecting downward from the ceiling tiles with their lower Parts are connected to the continuous bottom chord.
  • the top chord has no weakening recesses.
  • the cross-sectional parts, in particular of the upper chord, are at the statically most favorable point.
  • the bending stiffness of the ceiling tiles in the direction across the beam is undisturbed.
  • the web or each web plate of each section consists of one half of a zigzag-shaped wide flat steel.
  • the lower reinforcement of the ceiling slab can be guided transversely to the composite girder plane during the prefabrication through the openings.
  • connection between the web of each section and the continuous lower chord must transmit the forces occurring from the web to the lower chord or from the lower chord to the web.
  • Form-fit connections are best suited for this purpose, but they require tight tolerances during prefabrication. According to claim 4, therefore, non-positive connections are preferred in which the web and lower flange are pressed or clamped so tightly that the forces are transmitted directly from the web to the lower flange or vice versa by static friction.
  • Slip-resistant screw connections are particularly suitable for this, in which screws made of heavy-duty material are tightened with a prescribed, high tightening torque and then press the elements to be connected together with a correspondingly high pressure. Such screws usually sit with play in the connection holes. It is therefore preferred according to claim 6, in each case open in the web downwards.
  • FIG. 1 essentially shows the connection of a composite girder according to the invention, namely the parts of two web sections la, lb, two upper belt sections 2a, 2b and two ceiling plates 3a, 3b, which are adjacent to the connecting joint or the joint, and a continuous lower belt 4 , which consists of two L-profiles in the illustrated exemplary embodiment.
  • Each web section la, 1b consists of three zigzag halved broad flat steels as web plates, to which the upper chord profiles 2a and 2b are welded. They are concreted into the ceiling slabs 3a and 3b in the workshop.
  • the continuous lower flange 4 is fastened to the support end supports (e.g. supports) and raised in the middle of the field by assembly supports.
  • the web plates la, b concreted in are inserted between the lower flange profiles 4a, b and connected to them by means of non-slip screw connection 5. Either holes or slots open at the bottom can be provided for the HV bolts in the multi-wall sheets. Tolerances across the composite girder plane are compensated by forcing the flexible web plates 1 in the direction of escape of the lower flange 4.
  • the outer multi-wall panels are spread downwards during assembly and the lower flange profiles are pressed apart. Spacers 6 serve this purpose.
  • Additional profiles 7 are screwed to both sides of a butt joint in the lower flange, or other reinforcements in order to transmit the transverse force which arises at the joint.
  • the pressure force transmission of the upper chord at the abutment of the ceiling slabs 3a, 3b is produced by an inserted steel piece 8 and the concrete filling 9.
  • Modifications to the construction shown are obvious for the person skilled in the art. Instead of a lower flange made of two L-profiles, a single T-profile can also be used, the multi-wall sheets then lying on the outside. Conversely, all of the multi-wall sheets can also lie close together so that they can be inserted together between L-profiles of the lower flange, the distance between the two lower flange profiles is then correspondingly larger.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • Composite Materials (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Bridges Or Land Bridges (AREA)
  • Load-Bearing And Curtain Walls (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Tents Or Canopies (AREA)

Abstract

A compound girder of an on-site assembly type is assembled to include components which rigidly interconnect two or more prefabricated ceiling panels (3a, 3b) in a bending stiff manner. The compound girder includes for each ceiling panel (3a, 3b) at least one web section (1a, 1b) and an upper chord section (2a, 2b). The girder further includes a continuous length lower chord (4). The lower chord (4) takes up the tension and shearing loads. The individual web sections (1a, 1b) are secured to the lower chord (4) by screw connections which prevent a sliding displacement between the connected elements relative to each other.

Description

Die Erfindung betrifft einen Verbundträger in Montagebauweise als biegesteife Verbindung vorgefertigter Deckenplatten.The invention relates to a composite beam in assembly design as a rigid connection of prefabricated ceiling panels.

Früher wurden Verbundkonstruktionen generell in Ortbauweise ausgeführt, d.h. es wurde eine Stahlkonstruktion erstellt, deren oberer Bereich an Ort und Stelle einbetoniert wurde. Für diese Herstellungsart sind verschiedene Stahlkonstruktionen bekannt.In the past, composite constructions were generally carried out in place, i.e. a steel structure was created, the upper area of which was concreted in place. Various steel structures are known for this type of production.

So ist aus der DE-PS 76 977 bekannt, Stegplatten normal aus der Betonplatte heraustreten zu lassen und diese am freien Ende mit Winkeleisen als Gurt auszustatten, wobei zum Schutz vor Temperaturspannungen die Stegplatten durch Fugen unterteilt sein können.For example, it is known from DE-PS 76 977 to allow web plates to emerge normally from the concrete plate and to equip them at the free end with angle irons as belts, whereby the web plates can be divided by joints to protect them from temperature stresses.

Ferner ist es aus der US-PS 10 47 030 bekannt, zwischen zwei L-Eisen als Untergurt Diagonalstäbe einzuschrauben, deren oberes Ende einbetoniert wird. Der Zwischenraum zwischen Untergurt und Beton wird dabei ausgemauert.Furthermore, it is known from US-PS 10 47 030 to screw diagonal bars between two L-bars as the lower chord, the upper end of which is concreted in. The space between the lower flange and concrete is bricked up.

Auch ist bekannt, daß die Stahlkonstruktion aus Fachwerken mit L-Untergurten besteht, z.B. US-PS 19 79 643; 40 56 908, und DE-OS 21 23 351, oder aus Wabenträgern gemäß US-PS 41 15 971.It is also known that the steel structure consists of trusses with L-lower chords, e.g. U.S. Patent 19 79 643; 40 56 908, and DE-OS 21 23 351, or from honeycomb carriers according to US-PS 41 15 971.

Heute sind Verbundkonstruktionen vorwiegend in Fertigteilbauweise Ublich. Dabei werden die einzelnen Deckenplatten werkstattmäßig in transportablen Größen vorgefertigt und auf der Baustelle zur Decke oder einer Brücke zusammengesetzt. Die einzelnen Deckenplatten können Stahlbetonplatten sein oder Verbundkonstruktionen mit einachsig verlaufenden Stahlkonstruktionen, wobei der Verbund wie bei den Ortbauweisen erfolgt (DE-OS 21 53 495, US-PS 20 00 110).Today, composite structures are mostly used in prefabricated construction. The individual ceiling tiles are prefabricated in transportable sizes in the workshop and put together on the construction site to form a ceiling or a bridge. The individual ceiling panels can be reinforced concrete panels or composite constructions with uniaxial steel constructions, the composite being carried out as in the local construction methods (DE-OS 21 53 495, US-PS 20 00 110).

Um aus diesen einzelnen Deckenplatten eine zusammenhängende Decke aufzubauen, ist es Ublich, diese auf UnterzUge aufzulagern. Es ist möglich, solche Unterzüge zusammen mit den Deckenplatten als Verbundträger auszubilden..Zweck eines derartigen Verbundträgers ist es, zwei oder mehr Deckenplatten so miteinander zu verbinden, daß eine Tragwirkung quer zum Fugenverlauf der Deckenplatten entsteht, wobei die Deckenplatten selbst einen Gurt des Verbundträgers bilden.In order to build a cohesive ceiling from these individual ceiling panels, it is customary to support them on joists. It is possible to form such joists together with the ceiling panels as composite beams. The purpose of such a composite beam is to connect two or more ceiling panels so that one The load-bearing effect is created transversely to the course of the ceiling tiles, whereby the ceiling tiles themselves form a belt for the composite girder.

Bekannt sind Verbundträger mit vorgefertigten Deckenplatten z.B. aus dem BrUckenbau. Hierbei werden vorgefertigte Deckenplatten auf einen Doppel-T-Träger gleitfest aufgeschraubt (HV-Verbindung nach DIN 1050). Die Plattenfugen erhalten eine Ortbetonfüllung. Bei einer anderen AusfUhrungsart werden statt der gleitfesten Verschraubung Kopfbolzendübel oder Dollen derart auf den Obergurt eines Doppel-T-Trägers geschweißt, daß sie in Aussparungen der Deckenplatten hineinragen, die mit Ortbeton gefüllt werden. Nach Erhärten des Betons in den Plattenfugen und den Aussparungen ist ein Verbundträger als biegesteife Verbindung vorgefertigter Deckenplatten vorhanden. Von dieser AusfUhrungsart wird auch in der DE-AS 15 34 703 "Deckenkonstruktion in Verbundträgerbauweise" ausgegangen.Composite beams with prefabricated ceiling panels are known e.g. from the bridge construction. Here, prefabricated ceiling panels are screwed onto a double-T beam so that they are non-slipping (HV connection according to DIN 1050). The plate joints are filled with in-situ concrete. In another embodiment, instead of the non-slip screw connection, headed dowels or oarlocks are welded onto the top chord of a double-T beam in such a way that they protrude into recesses in the ceiling panels, which are filled with in-situ concrete. After the concrete has hardened in the panel joints and the recesses, a composite beam is available as a rigid connection for prefabricated ceiling panels. This type of design is also assumed in DE-AS 15 34 703 "ceiling construction in composite girder construction".

Es ist weiterhin bekannt, die in Trägerrichtung verlaufenden Kanten von Deckenplatten mit Winkelstählen, an die Kopfbolzen geschweißt sind, zu versehen und mit einem durchgehenden Doppel-T-Träger gleitfest zu verschrauben (DE-OS 25 26 278 "Deckenkonstruktion in Verbundträgerbauweise").It is also known to provide the edges of ceiling tiles running in the direction of the support with angle steel to which the head bolts are welded and to screw them together with a continuous double T-beam (DE-OS 25 26 278 "ceiling construction in composite support construction").

Derartige Verbundträger weisen verschiedene Nachteile auf. Allen gemeinsam ist, daß die Schubverbindung zwischen den Gurten durch Verbundmittel,wie gleitfeste Verschraubung oder Dollen, einschnittig ist und damit einen hohen Aufwand an Verbundmitteln erfordert.Such composite beams have various disadvantages. What they all have in common is that the shear connection between the belts by means of composite means, such as non-slip screwing or oarlocks, has a single cut and therefore requires a high amount of composite means.

Es ist weiterhin generell von Nachteil, daß der Obergurt durch Einzelaussparungen mit geringerwertiger OrtbetonfUllung oder durchgehenden Querschnittsverlust wegen des Platzbedarfs für die Verschraubung geschwächt wird. Dies wirkt sich bei Randträgern besonders unvorteilhaft aus, da eine Verteilung der Obergurtkraft in der Deckenplatte Querschnittsverdrillungen des Verbundträgers zur Folge hat. Außerdem ist bei allen genannten Ausführungen der obere Flansch des Doppel-T-Profils unter der Deckenplatte angeordnet, also statisch ungünstig und kaum ausgenutzt.It is also generally a disadvantage that the upper chord is weakened by individual recesses with inferior in-situ concrete filling or continuous loss of cross-section due to the space required for the screw connection. This has a particularly disadvantageous effect on edge beams because a distribution of the upper chord force in the ceiling tile results in cross-sectional twisting of the composite beam. In addition, the upper flange of the double-T profile is arranged under the ceiling panel in all of the above-mentioned designs, that is to say statically unfavorable and hardly used.

Ein spezifischer Nachteil des zuletzt angeführten Verbundträgers ist die mit dieser AusfUhrungsart zwingend verbundene Unterbrechung der Biegesteifigkeit der Deckenplatte quer zur Verbundträgerachse. Dadurch ist z.B. eine Auskragung der Deckenplatten gar nicht oder nur mit zusätzlichem Aufwand möglich.A specific disadvantage of the composite girder mentioned last is the interruption of the bending stiffness of the ceiling slab transverse to the composite girder axis, which is mandatory with this embodiment. This makes e.g. cantilevering the ceiling panels is not possible or only with additional effort.

Der Erfindung liegt die Aufgabe zugrunde, einen Verbundträger in Montagebauweise als biegesteife Verbindung vorgefertigter Deckenplatten zu schaffen, der die notwendige Schubverbindung zwischen den Gurten mit geringerem Aufwand zuläßt, der eine statisch bessere Materialausnutzung gestattet und der die Biegesteifigkeit der Deckenplatten quer zur Verbundträgerrichtung ohne Zusatzaufwand erhält.The invention has for its object to provide a composite girder in assembly design as a rigid connection of prefabricated ceiling panels, which allows the necessary shear connection between the belts with less effort, which allows a statically better material utilization and which maintains the bending stiffness of the ceiling panels across the composite girder direction without additional effort.

Ausgehend von einem Verbundträger in Montagebauweise als biegesteife Verbindung vorgefertigter Deckenplatten, bestehend aus einem mit den einzelnen Deckenplatten verbundenen Träger aus Obergurt, Steg und durchgehendem Untergurt, wird diese Aufgabe erfindungsgemäß dadurch gelöst, daß der Obergurt und der Steg in Abschnitte aufgeteilt sind, deren Länge im wesentlichen gleich der Breite der zugehörigen Deckenplatte ist, daß der Obergurt und ein an diesen angrenzender Teil des Steges jedes Abschnittes bei der Vorfertigung der Deckenplatte in diese eingebettet sind, und daß bei der Montage die aus den Deckenplatten nach unten vorstehenden Stegteile jedes Abschnittes mit ihren unteren Teilen mit dem durchgehenden Untergurt verbunden sind.Starting from a composite girder in assembly design as a rigid connection of prefabricated ceiling panels, consisting of a carrier connected to the individual ceiling panels made of top flange, web and continuous bottom flange, this object is achieved according to the invention in that the top flange and the web are divided into sections, the length of which in is essentially equal to the width of the associated ceiling tile that the upper flange and a part of the web of each section adjacent to it are embedded in the prefabrication of the ceiling tile, and that during assembly the web parts of each section projecting downward from the ceiling tiles with their lower Parts are connected to the continuous bottom chord.

Die mit der Erfindung erzielten Vorteile sind:

  • Die Verbindungsmittel für die Schubübertragung können, bei gleicher Festigkeit, um das Mehrfache geringer dimensioniert werden.
The advantages achieved with the invention are:
  • The connecting means for the thrust transmission can be dimensioned several times smaller with the same strength.

Der Obergurt hat keine schwächenden Aussparungen.The top chord has no weakening recesses.

Die Querschnittsteile, insbesondere des Obergurts, liegen an der statisch günstigsten Stelle.The cross-sectional parts, in particular of the upper chord, are at the statically most favorable point.

Die Biegesteifigkeit der Deckenplatten in Richtung quer zum Träger ist ungestört vorhanden.The bending stiffness of the ceiling tiles in the direction across the beam is undisturbed.

Spezielle Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen. So hat die Auflösung der Stege in mehrere dünne Stegplatten gemäß Anspruch 2 die Auswirkung, daß bei der Montage Fertigungstoleranzen in Richtung quer zum Träger aufgenommen werden. Die elastischen Stegplatten werden leicht in die Fluchtrichtung des durchgehenden Untergurts gezwängt. Durch die feste Verbindung der Stegplatten untereinander am Untergurt ist die Gesamtstabilität eines derartigen Steges im Vergleich mit einem nicht in mehrere Stegplatten aufgelösten Steg nur wenig geringer.Special embodiments of the invention result from the subclaims. So the dissolution of the webs in several thin multi-wall sheets according to claim 2 has the effect that manufacturing tolerances are recorded in the direction transverse to the carrier. The elastic multi-wall sheets are easily forced into the direction of escape of the continuous lower flange. Due to the fixed connection of the web plates to one another on the lower flange, the overall stability of such a web is only slightly less in comparison with a web that is not broken down into several web plates.

Die erwünschte Durchlässigkeit der Träger für Installationsleitungen sowie Materialeinsparungen werden dadurch erreicht, daß gemäß Anspruch 3 der Steg bzw. jede Stegplatte jedes Abschnittes aus einer Hälfte eines zickzackförmig geteilten Breitflachstahls besteht. Außerdem kann bei dieser Ausgestaltung bei der Vorfertigung durch die öffnungen die untere Bewehrung der Deckenplatte quer zur Verbundträgerebene geführt werden.The desired permeability of the supports for installation lines and material savings are achieved in that, according to claim 3, the web or each web plate of each section consists of one half of a zigzag-shaped wide flat steel. In addition, in this configuration, the lower reinforcement of the ceiling slab can be guided transversely to the composite girder plane during the prefabrication through the openings.

Die Verbindung zwischen dem Steg jedes Abschnittes und dem durchgehenden Untergurt muß die auftretenden Kräfte vom Steg auf den Untergurt bzw. vom Untergurt auf den Steg übertragen. Dazu sind zwar formschlüssige Verbindungen an sich am besten geeignet, diese erfordern jedoch enge Toleranzen bei der Vorfertigung. Gemäß Anspruch 4 werden deshalb kraftschlUssige Verbindungen bevorzugt, bei denen Steg und Untergurt so fest zusammengepreßt oder -geklemmt werden, daß die Kräfte durch Haftreibung unmittelbar vom Steg auf den Untergurt bzw. umgekehrt Ubertragen werden. Speziell geeignet sind hierfür gleitfeste Verschraubungen, bei denen Schrauben aus hochbelastbarem Material mit einem vorgeschriebenen, hohen Anzugsmoment angezogen werden und daraufhin die zu verbindenden Elemente mit einem entsprechend hohen Druck aufeinander pressen. Solche Schrauben sitzen Ublicherweise mit Spiel in den Verbindungslöchern. Es wird deshalb gemäß Anspruch 6 bevorzugt, im Steg jeweils nach unten offene. Schlitze zur Aufnahme der Schrauben vorzusehen, denn damit wird die Vorfertigung erheblich vereinfacht, weil die Lage der Schraublöcher im Steg große Toleranzen aufweisen kann, das gilt insbesondere für die vertikale Lage; erfreulicherweise kann dadurch zusätzlich die Montage auf der Baustelle vereinfacht werden, weil die Schrauben bereits in den Untergurt eingesetzt werden können, ehe die Deckenplatten montiert werden.The connection between the web of each section and the continuous lower chord must transmit the forces occurring from the web to the lower chord or from the lower chord to the web. Form-fit connections are best suited for this purpose, but they require tight tolerances during prefabrication. According to claim 4, therefore, non-positive connections are preferred in which the web and lower flange are pressed or clamped so tightly that the forces are transmitted directly from the web to the lower flange or vice versa by static friction. Slip-resistant screw connections are particularly suitable for this, in which screws made of heavy-duty material are tightened with a prescribed, high tightening torque and then press the elements to be connected together with a correspondingly high pressure. Such screws usually sit with play in the connection holes. It is therefore preferred according to claim 6, in each case open in the web downwards. Provide slots for receiving the screws, because this simplifies the prefabrication considerably because the position of the screw holes in the web can have large tolerances, this applies in particular to the vertical position; Fortunately, this can also simplify assembly on the construction site because the screws can already be inserted into the lower flange before the ceiling panels are installed.

In der Zeichnung ist ein AusfUhrungsbeispiel der Erfindung dargestellt, und zwar zeigt

  • Fig. 1 einen Teil eines montierten Verbundträgers in seitlicher Ansicht mit Schnitt durch die zugehörigen Teile von zwei an" einanderstoßenden Deckenplatten,
  • Fig. 2 einen Schnitt längs der Linie I-I, und
  • Fig. 3 einen Schnitt längs der Linie II-II.
In the drawing, an exemplary embodiment of the invention is shown and shows
  • 1 shows a part of an assembled composite beam in a side view with a section through the associated parts of two "abutting ceiling panels,"
  • Fig. 2 shows a section along the line II, and
  • Fig. 3 shows a section along the line II-II.

In Fig. 1 ist im wesentlichen die Verbindung eines Verbundträgers nach der Erfindung dargestellt, nämlich die jeweils an die Verbindungsfuge oder den Stoß angrenzenden Teile von zwei Stegabschnitten la, lb, zwei Obergurtabschnitten 2a, 2b und zwei Deckenplatten 3a, 3b sowie ein durchgehender Untergurt 4, der im dargestellten Ausfuhrungsbeispiel aus zwei L-Profilen besteht.1 essentially shows the connection of a composite girder according to the invention, namely the parts of two web sections la, lb, two upper belt sections 2a, 2b and two ceiling plates 3a, 3b, which are adjacent to the connecting joint or the joint, and a continuous lower belt 4 , which consists of two L-profiles in the illustrated exemplary embodiment.

Jeder Stegabschnitt la, 1b besteht aus drei zickzackförmig halbierten Breitflachstählen als Stegplatten, an die die Obergurtprofile 2a bzw. 2b angeschweißt sind. Sie sind werkstattmäßig in die Deckenplatten 3a bzw. 3b einbetoniert. Der durchgehende Untergurt 4 ist an den Trägerendauflagern (z. B. Stützen) befestigt und durch MontagestUtzen in Feldmitte überhöht. Die einbetonierten Stegplatten la, b sind zwischen die Untergurtprofile 4a, b eingeschoben und mit ihnen durch gleitfeste Verschraubung 5 verbunden. Dabei können für die HV-Schraubbolzen in den Stegplatten entweder Löcher oder nach unten offene Schlitze vorgesehen werden. Toleranzen quer zur Verbundträgerebene werden ausgeglichen, indem die biegsamen Stegplatten 1 in die Fluchtrichtung des Untergurts 4 gezwängt werden. Um das Einführen der Stegplatten 1 zwischen die Untergurtprofile 4 zu erleichtern, werden bei der Montage die äußeren Stegplatten nach unten hin gespreizt und die Untergurtprofile auseinandergedrückt. Dazu dienen Abstandhalter 6.Each web section la, 1b consists of three zigzag halved broad flat steels as web plates, to which the upper chord profiles 2a and 2b are welded. They are concreted into the ceiling slabs 3a and 3b in the workshop. The continuous lower flange 4 is fastened to the support end supports (e.g. supports) and raised in the middle of the field by assembly supports. The web plates la, b concreted in are inserted between the lower flange profiles 4a, b and connected to them by means of non-slip screw connection 5. Either holes or slots open at the bottom can be provided for the HV bolts in the multi-wall sheets. Tolerances across the composite girder plane are compensated by forcing the flexible web plates 1 in the direction of escape of the lower flange 4. In order to facilitate the insertion of the multi-wall sheets 1 between the lower flange profiles 4, the outer multi-wall panels are spread downwards during assembly and the lower flange profiles are pressed apart. Spacers 6 serve this purpose.

An einer Stoßfuge sind im Untergurt Zusatzprofile 7 beiderseits mit angeschraubt, oder andere Verstärkungen, um die an der Fuge entstehende Querkraft zu übertragen. Die Druckkraftübertragung des Obergurts an der Stoßstelle der Deckenplatten 3a, 3b wird durch ein eingelegtes Stahlstück 8 und die Betonfüllung 9 hergestellt. Abwandlungen der dargestellten Konstruktion ergeben sich für den Fachmann von selbst. So kann statt eines Untergurtes aus zwei L-Profilen auch ein einziges T-Profil verwendet werden, die Stegplatten liegen dann außen an. Umgekehrt können auch alle Stegplatten eng aneinander liegen, so daß sie gemeinsam zwischen L-Profile des Untergurtes eingeschoben werden können, der Abstand der beiden Untergurtprofile ist dann entsprechend größer.Additional profiles 7 are screwed to both sides of a butt joint in the lower flange, or other reinforcements in order to transmit the transverse force which arises at the joint. The pressure force transmission of the upper chord at the abutment of the ceiling slabs 3a, 3b is produced by an inserted steel piece 8 and the concrete filling 9. Modifications to the construction shown are obvious for the person skilled in the art. Instead of a lower flange made of two L-profiles, a single T-profile can also be used, the multi-wall sheets then lying on the outside. Conversely, all of the multi-wall sheets can also lie close together so that they can be inserted together between L-profiles of the lower flange, the distance between the two lower flange profiles is then correspondingly larger.

Claims (6)

1. Verbundträger in Montagebauweise als biegesteife Verbindung vorgefertigter Deckenplatten (3), bestehend aus einem mit den einzelnen Deckenplatten (3) verbundenen Träger aus Obergurt (2), Steg (1).und durchgehendem Untergurt (4), dadurch gekennzeichnet, daß der Obergurt (2) und der Steg (1) in Abschnitte aufgeteilt sind, deren Länge im wesentlichen gleich der Breite der zugehörigen Deckenplatte (3) ist, daß der Obergurt (2) und ein an diesem angrenzender Teil des Steges (1) jedes Abschnittes bei der Vorfertigung der Deckenplatte (3) in diese eingebettet sind, und daß bei der Montage die aus den Deckenplatten (3) nach unten vorstehenden Stegteile (1) jedes Abschnittes mit ihren unteren Teilen mit dem durchgehenden Untergurt (4) verbunden sind.1. composite girder in assembly design as a rigid connection of prefabricated ceiling panels (3), consisting of a with the individual ceiling panels (3) connected carrier of the upper chord (2), web (1). And continuous lower chord (4), characterized in that the upper chord (2) and the web (1) are divided into sections, the length of which is substantially equal to the width of the associated ceiling plate (3), that the upper flange (2) and an adjoining part of the web (1) of each section at the Prefabrication of the ceiling plate (3) are embedded in this, and that during assembly the web parts (1) projecting downwards from the ceiling plates (3) of each section are connected with their lower parts to the continuous lower flange (4). 2. Verbundträger nach Anspruch 1, dadurch gekennzeichnet, daß der Steg (1) jedes Abschnittes aus mehreren Stegplatten besteht.2. Composite beam according to claim 1, characterized in that the web (1) of each section consists of several web plates. 3. Verbundträger nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Steg(1) bzw. jede Stegplatte jedes Abschnittes aus einer Hälfte eines zickzackförmig geteilten Breitflachstahls besteht.3. Composite girder according to claim 1 or 2, characterized in that the web (1) or each web plate of each section consists of half of a zigzag divided broad flat steel. 4. Verbundträger nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß der Steg (1) jedes Abschnittes mit dem Untergurt (4) kraftschlüssig verbunden ist.4. composite carrier according to claim 1, 2 or 3, characterized in that the web (1) of each section with the lower flange (4) is non-positively connected. 5. Verbundträger nach Anspruch 4, dadurch gekennzeichnet, daß der Steg (1) jedes Abschnittes mit dem Untergurt (4) durch gleitfeste Verschraubung (5) verbunden ist.5. Composite carrier according to claim 4, characterized in that the web (1) of each section is connected to the lower flange (4) by means of non-slip screw connection (5). 6. Verbundträger nach Anspruch 5, dadurch gekennzeichnet, daß der Steg (1) jedes Abschnittes nach unten offene Schlitze zur Aufnahme der Schrauben (5) aufweist.6. Composite carrier according to claim 5, characterized in that the web (1) of each section has downwardly open slots for receiving the screws (5).
EP81103888A 1980-05-23 1981-05-20 Site-assembled composite beam Expired EP0040815B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81103888T ATE9020T1 (en) 1980-05-23 1981-05-20 COMPOSITE CARRIER IN PRE-ASSEMBLED CONSTRUCTION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803019744 DE3019744A1 (en) 1980-05-23 1980-05-23 ASSEMBLY STRUCTURAL JOINTS AS REINFORCED CONNECTION OF PRE-FABRED CEILING PANELS
DE3019744 1980-05-23

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EP0040815A2 true EP0040815A2 (en) 1981-12-02
EP0040815A3 EP0040815A3 (en) 1982-02-24
EP0040815B1 EP0040815B1 (en) 1984-08-15

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US (1) US4416099A (en)
EP (1) EP0040815B1 (en)
JP (1) JPS579944A (en)
AT (1) ATE9020T1 (en)
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DE (2) DE3019744A1 (en)

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EP1278922A1 (en) * 2000-04-26 2003-01-29 Flex-Frame L.L.C Open web dissymmetric beam construction
CN103556780A (en) * 2013-10-29 2014-02-05 刘阳 Flange buckling-preventing section steel and concrete composite beam
CN104947837A (en) * 2015-06-25 2015-09-30 宁波大学 Prefabricated steel bar truss combined floor and splicing method thereof
AT517824A1 (en) * 2015-09-21 2017-04-15 Franz Oberndorfer Gmbh & Co Kg Slab, in particular floor or ceiling slab for a building
CN110359358A (en) * 2019-06-06 2019-10-22 浙江大学 Steel-concrete combined structure taper cast iron bolt connection piece
FR3114823A1 (en) * 2020-10-07 2022-04-08 Aevia Modular bridge system and method of making same

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EP1278922A1 (en) * 2000-04-26 2003-01-29 Flex-Frame L.L.C Open web dissymmetric beam construction
EP1278922A4 (en) * 2000-04-26 2007-01-03 Girder Slab Technologies Llc Open web dissymmetric beam construction
CN103556780A (en) * 2013-10-29 2014-02-05 刘阳 Flange buckling-preventing section steel and concrete composite beam
CN103556780B (en) * 2013-10-29 2016-05-18 华侨大学 The anti-buckling shape steel-concrete combined beam in a kind of edge of a wing
CN104947837A (en) * 2015-06-25 2015-09-30 宁波大学 Prefabricated steel bar truss combined floor and splicing method thereof
AT517824A1 (en) * 2015-09-21 2017-04-15 Franz Oberndorfer Gmbh & Co Kg Slab, in particular floor or ceiling slab for a building
AT517824B1 (en) * 2015-09-21 2017-10-15 Franz Oberndorfer Gmbh & Co Kg Slab, in particular floor or ceiling slab for a building
CN110359358A (en) * 2019-06-06 2019-10-22 浙江大学 Steel-concrete combined structure taper cast iron bolt connection piece
FR3114823A1 (en) * 2020-10-07 2022-04-08 Aevia Modular bridge system and method of making same
WO2022074146A1 (en) * 2020-10-07 2022-04-14 Aevia Modular bridge system and method for producing same

Also Published As

Publication number Publication date
CA1160469A (en) 1984-01-17
DE3019744A1 (en) 1981-12-03
US4416099A (en) 1983-11-22
EP0040815A3 (en) 1982-02-24
DE3165537D1 (en) 1984-09-20
EP0040815B1 (en) 1984-08-15
ATE9020T1 (en) 1984-09-15
JPS579944A (en) 1982-01-19

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