EP0062096B1 - Concrete girder - Google Patents

Concrete girder Download PDF

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Publication number
EP0062096B1
EP0062096B1 EP81108538A EP81108538A EP0062096B1 EP 0062096 B1 EP0062096 B1 EP 0062096B1 EP 81108538 A EP81108538 A EP 81108538A EP 81108538 A EP81108538 A EP 81108538A EP 0062096 B1 EP0062096 B1 EP 0062096B1
Authority
EP
European Patent Office
Prior art keywords
profile
concrete
girder
shaped
box
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.)
Expired
Application number
EP81108538A
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German (de)
French (fr)
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EP0062096A3 (en
EP0062096A2 (en
Inventor
Heinrich Dr.-Ing. Bechert
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to AT81108538T priority Critical patent/ATE15395T1/en
Publication of EP0062096A2 publication Critical patent/EP0062096A2/en
Publication of EP0062096A3 publication Critical patent/EP0062096A3/en
Application granted granted Critical
Publication of EP0062096B1 publication Critical patent/EP0062096B1/en
Expired legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • 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
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members

Definitions

  • the invention relates to a concrete beam which has a T-profile at least on the upper part.
  • Such beams are manufactured in standard sizes, with a reusable formwork being provided for each size.
  • a larger span or a span between the standard sizes is required. Since the formwork for girders is relatively complicated, it is very expensive to produce special formwork for such intermediate or oversized sizes, which can then only be used in the rarest of cases.
  • GB-PS 560 243 shows a concrete beam in which the top chord is designed as a solid box. Although the form of the box reinforces the girder, it is also necessary to use special formwork for the production. In addition, the carrier is very heavy, requires a high amount of material and also has a large tipping load, so that the tipping stiffness is increased rather than reduced compared to normal carriers.
  • the carrier according to US Pat. No. 1,990,156 is a normal carrier which supports a blanket, the blanket serving as reinforcement and at the same time increasing the tilting rigidity. However, such a beam is neither suitable for free bracing nor to support openwork, non-load-bearing ceiling parts.
  • the object of the present invention is to provide a relatively light girder with a high load-bearing capacity and great tilting rigidity, for which standardized concrete girders are used, which can be enlarged in their span by a relatively simple additional formwork.
  • This is achieved by molding a hollow box-shaped concrete profile that is open at the bottom onto the top flange of the T-profile.
  • you can pre-concrete a standardized concrete beam and then concrete the box-shaped profile using a simple side panel on the top chord.
  • the tipping stability is increased.
  • Another advantage is the fact that the web height remains relatively small, so that the web thickness does not have to be increased unnecessarily. Furthermore, compacting with the vibrating bottle is achieved very cheaply.
  • the box girder is provided with a lost formwork, in particular filled with rigid foam.
  • a lost formwork in particular filled with rigid foam.
  • another formwork for example made of sheet metal, can also be used.
  • the process for producing the concrete girder according to the invention is carried out in several sections, with the girder being pre-concreted without a box profile, then formwork surfaces are attached to both sides of the top cover and a lost formwork between them, and then the hollow box-shaped concrete profile, which is open at the bottom, is concreted.
  • the drawing shows an embodiment of the invention, namely the cross section through a double-T-shaped concrete beam.
  • the beam 1 is a standard beam with the web 2, the beam 3 and the top 4.
  • a box-shaped hollow profile 5 is concreted, the inner cavity of which is filled with hard foam 6.
  • the standard support 1 is first pre-concreted, whereupon the rigid foam 6 is then placed on the top cover 4 and, as shown in dashed lines, 4 simple formwork boards 7 are arranged on the side of the top cover. Subsequently, the hollow box-shaped concrete profile 5, which is open at the bottom, is concreted onto the upper block 4.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

1. Concrete girder having a T-shaped profile at least in its upper part, characterised in that an open-bottomed hollow box-shaped concrete profile (5) is integrally moulded on the top chord (4) of the T-shaped profile.

Description

Die Erfindung bezieht sich auf einen Betonträger, der zumindest am Oberteil ein T-Profil aufweist. Derartige Träger werden in Normgrössen hergestellt, wobei für jede Grösse eine wiederverwendbare Schalung vorgesehen ist. Es ergeben sich nun Fälle, bei denen eine grössere oder eine zwischen den Normgrössen liegende Spannweite gefordert wird. Da die Schalungen für Träger verhältnismässig kompliziert sind, ist es sehr kostenaufwendig, wenn man für solche Zwischen- oder Übergrössen Spezialschalungen herstellt, die dann nur noch in den seltensten Fällen weiterverwendet werden können.The invention relates to a concrete beam which has a T-profile at least on the upper part. Such beams are manufactured in standard sizes, with a reusable formwork being provided for each size. There are now cases in which a larger span or a span between the standard sizes is required. Since the formwork for girders is relatively complicated, it is very expensive to produce special formwork for such intermediate or oversized sizes, which can then only be used in the rarest of cases.

Die GB-PS 560 243 zeigt einen Betonträger, bei welchem der Obergurt als massiver Kasten ausgebildet ist. Zwar ergibt sich durch die Kastenform eine Verstärkung des Trägers, jedoch ist es auch hier notwendig, zur Herstellung eine Spezialschalung zu verwenden. Hinzu kommt, dass der Träger ein sehr hohes Gewicht aufweist, einen hohen Materialaufwand beansprucht und ausserdem eine grosse Kipplast aufweist, so dass die Kippsteifigkeit gegenüber normalen Trägern eher erhöht anstatt verringert ist. Bei dem Träger nach der US-PS 1 990 156 handelt es sich um einen normalen Träger, der eine Decke stützt, wobei die Decke zur Verstärkung dient und gleichzeitig die Kippsteifigkeit erhöht. Ein solcher Träger ist jedoch weder für eine freie Verspannung noch zur Unterstützung von durchbrochenen, nichttragenden Deckenteilen geeignet.GB-PS 560 243 shows a concrete beam in which the top chord is designed as a solid box. Although the form of the box reinforces the girder, it is also necessary to use special formwork for the production. In addition, the carrier is very heavy, requires a high amount of material and also has a large tipping load, so that the tipping stiffness is increased rather than reduced compared to normal carriers. The carrier according to US Pat. No. 1,990,156 is a normal carrier which supports a blanket, the blanket serving as reinforcement and at the same time increasing the tilting rigidity. However, such a beam is neither suitable for free bracing nor to support openwork, non-load-bearing ceiling parts.

Die Aufgabe der vorliegenden Erfindung ist es, einen relativ leichten Träger mit hoher Tragkraft und grosser Kippsteifigkeit zu schaffen, für welchen genormte Betonträger verwendet werden, die durch eine relativ einfache Zusatzschalung in ihrer Spannweite vergrössert werden können. Dies wird durch die Anformung eines nach unten offenen, hohlkastenförmigen Betonprofiles auf den Obergurt des T-Profiles erreicht. Hierbei kann man einen genormten Betonträgervorbetonieren und dann anschliessend mittels einer einfachen Seitenverschalung auf dem Obergurt das kastenförmige Profil anbetonieren. Durch die Verstärkung des Obergurts wird zusätzlich die Kippstabilität erhöht. Als weiterer Vorteil ergibt sich der Umstand, dass die Steghöhe relativ klein bleibt, so dass auch die Stegdicke nicht unnötig verstärkt werden muss. Des weiteren erreicht man ein sehr günstiges Verdichten mit der Rüttelflasche.The object of the present invention is to provide a relatively light girder with a high load-bearing capacity and great tilting rigidity, for which standardized concrete girders are used, which can be enlarged in their span by a relatively simple additional formwork. This is achieved by molding a hollow box-shaped concrete profile that is open at the bottom onto the top flange of the T-profile. Here you can pre-concrete a standardized concrete beam and then concrete the box-shaped profile using a simple side panel on the top chord. By strengthening the top chord, the tipping stability is increased. Another advantage is the fact that the web height remains relatively small, so that the web thickness does not have to be increased unnecessarily. Furthermore, compacting with the vibrating bottle is achieved very cheaply.

Nach einem weiteren Merkmal der Erfindung ist der Hohlkasten mit einer verlorenen Schalung versehen, insbesondere mit Hartschaum ausgefüllt. Anstelle des Hartschaums kann auch eine andere Schalung, beispielsweise aus Blech, verwendet werden.According to a further feature of the invention, the box girder is provided with a lost formwork, in particular filled with rigid foam. Instead of the rigid foam, another formwork, for example made of sheet metal, can also be used.

Das Verfahren zur Herstellung des erfindungsgemässen Betonträgers erfolgt in mehreren Abschnitten, wobei zunächst der Träger ohne Kastenprofil vorbetoniert, dann beiderseits des Oberzugs Schalflächen und zwischen diesen eine verlorene Schalung angebracht werden und anschliessend das nach unten offene, hohlkastenförmige Betonprofil anbetoniert wird.The process for producing the concrete girder according to the invention is carried out in several sections, with the girder being pre-concreted without a box profile, then formwork surfaces are attached to both sides of the top cover and a lost formwork between them, and then the hollow box-shaped concrete profile, which is open at the bottom, is concreted.

Die Zeichnung zeigt ein Ausführungsbeispiel der Erfindung und zwar den Querschnitt durch einen Doppel-T-förmigen Betonträger.The drawing shows an embodiment of the invention, namely the cross section through a double-T-shaped concrete beam.

Bei dem Träger 1 handelt es sich um einen Normträger mit dem Steg 2, dem Unterzug 3 und dem Oberzug 4. Am Oberzug 4 ist ein kastenförmiges Hohlprofil 5 anbetoniert, dessen innerer Hohlraum mit Hartschaum 6 ausgefüllt ist.The beam 1 is a standard beam with the web 2, the beam 3 and the top 4. On the top 4, a box-shaped hollow profile 5 is concreted, the inner cavity of which is filled with hard foam 6.

Zur Herstellung dieses Trägers wird zunächst der Normträger 1 vorbetoniert, worauf dann anschliessend der Hartschaum 6 auf den Oberzug 4 aufgesetzt und, wie gestrichelt dargestellt, seitlich des Oberzugs 4 einfache Schalbretter 7 angeordnet werden. Anschliessend wird dann das nach unten offene, hohlkastenförmige Betonprofil 5 an den Oberzug 4 anbetoniert.To produce this support, the standard support 1 is first pre-concreted, whereupon the rigid foam 6 is then placed on the top cover 4 and, as shown in dashed lines, 4 simple formwork boards 7 are arranged on the side of the top cover. Subsequently, the hollow box-shaped concrete profile 5, which is open at the bottom, is concreted onto the upper block 4.

Claims (3)

1. Concrete girder having a T-shaped profile at least in its upper part, characterised in that an open-bottomed hollow box-shaped concrete profile (5) is integrally moulded on the top chord (4) of the T-shaped profile.
2. Girder according to Claim 1, characterised in that the hollow box (5) is provided with a disposable shuttering and is in particular filled with hard foam (6).
3. A method of producing a concrete girder, the girder (1) being pre-concreted without the box profile (5) after which shuttering (7) is applied to both sides of the top chord (4), according to one or more of the preceding Claims, characterised in that between the shuttering faces (7) there is provided a disposable shuttering, particularly of hard foam (6), after which the open-bottomed hollow box-shaped concrete profile (5) is concreted into place.
EP81108538A 1981-03-31 1981-10-20 Concrete girder Expired EP0062096B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81108538T ATE15395T1 (en) 1981-03-31 1981-10-20 CONCRETE BEAM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3112763A DE3112763A1 (en) 1981-03-31 1981-03-31 "CONCRETE CARRIER"
DE3112763 1981-03-31

Publications (3)

Publication Number Publication Date
EP0062096A2 EP0062096A2 (en) 1982-10-13
EP0062096A3 EP0062096A3 (en) 1983-05-18
EP0062096B1 true EP0062096B1 (en) 1985-09-04

Family

ID=6128846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108538A Expired EP0062096B1 (en) 1981-03-31 1981-10-20 Concrete girder

Country Status (3)

Country Link
EP (1) EP0062096B1 (en)
AT (1) ATE15395T1 (en)
DE (1) DE3112763A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022174926A1 (en) * 2021-02-22 2022-08-25 Ipr - Intelligente Peripherien Für Roboter Gmbh Running rail for a robot, robot system having a running rail of this type, and method for producing a running rail of this type

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2292278B1 (en) * 2004-10-01 2009-03-01 Structural Research, S.L. PROCEDURE FOR THE MANUFACTURE OF A STRUCTURAL ELEMENT FOR VIADUCTS, BRIDGES OR SIMILAR AND RESULTING STRUCTURAL ELEMENT.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1990156A (en) * 1932-12-15 1935-02-05 Leonie S Young Reenforced concrete joist
GB560243A (en) * 1942-10-09 1944-03-27 William George Shipwright Improvements in framed concrete building construction
GB856677A (en) * 1958-08-22 1960-12-21 Monsanto Chemicals Improvements relating to concrete structures
US3336708A (en) * 1964-11-16 1967-08-22 Robert D Rambelle Shoring member for use as temporary support of concrete slabs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022174926A1 (en) * 2021-02-22 2022-08-25 Ipr - Intelligente Peripherien Für Roboter Gmbh Running rail for a robot, robot system having a running rail of this type, and method for producing a running rail of this type

Also Published As

Publication number Publication date
EP0062096A3 (en) 1983-05-18
EP0062096A2 (en) 1982-10-13
ATE15395T1 (en) 1985-09-15
DE3112763A1 (en) 1982-10-07

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