EP0027832B1 - Poutre en treillis tridimensionelle - Google Patents

Poutre en treillis tridimensionelle Download PDF

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Publication number
EP0027832B1
EP0027832B1 EP79104219A EP79104219A EP0027832B1 EP 0027832 B1 EP0027832 B1 EP 0027832B1 EP 79104219 A EP79104219 A EP 79104219A EP 79104219 A EP79104219 A EP 79104219A EP 0027832 B1 EP0027832 B1 EP 0027832B1
Authority
EP
European Patent Office
Prior art keywords
sheet metal
metal rail
lattice girder
concrete
side walls
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
EP79104219A
Other languages
German (de)
English (en)
Other versions
EP0027832A1 (fr
Inventor
Peter Dr. Schiessl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cessione kaiser - Omnia Bausysteme Vetriebsgesells
Original Assignee
Kaiser-Omnia Bausysteme & Co GmbH
Kaiser-Omnia Bausysteme & Co GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kaiser-Omnia Bausysteme & Co GmbH, Kaiser-Omnia Bausysteme & Co GmbH filed Critical Kaiser-Omnia Bausysteme & Co GmbH
Priority to DE7979104219T priority Critical patent/DE2964741D1/de
Priority to AT79104219T priority patent/ATE2453T1/de
Priority to EP79104219A priority patent/EP0027832B1/fr
Priority to NO801928A priority patent/NO801928L/no
Publication of EP0027832A1 publication Critical patent/EP0027832A1/fr
Application granted granted Critical
Publication of EP0027832B1 publication Critical patent/EP0027832B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/065—Light-weight girders, e.g. with precast parts

Definitions

  • the invention relates to a spatial lattice girder with an upper chord, designed as an upwardly open sheet metal rail with a bottom and with side walls for receiving concrete, on the side walls of which diagonals are welded from the outside, which connect the upper chord to a lower chord bar.
  • DE-C-2427168 describes such a spatial lattice girder.
  • the trough-shaped sheet metal rail is smooth.
  • the free edge sections of the side walls of the sheet metal rail are first widened outwards and then drawn inwards.
  • the side walls of the sheet metal rail taper upwards, so that the diagonals are spread apart in an end view of the lattice girder.
  • this lattice girder To produce this lattice girder, a welding electrode is inserted into the sheet metal rail, which completely fills its free cross section.
  • the distance between the upper edges of the sheet metal rail is therefore of the order of 1 to 2 cm.
  • this has the disadvantage that only a concrete with fine-grained aggregates and a relatively large amount of water can be poured into this very narrow sheet metal rail.
  • such concrete is characterized by a relatively large shrinkage when setting. Because the walls of the sheet metal rail are smooth in the longitudinal direction, there is therefore the risk that the set concrete rod will come loose from the bond with the sheet metal rail with only slight loads. Due to the poor bond between the sheet metal rail and the concrete and the small concrete cross-section in the top chord, the installation span of this lattice girder is only slightly increased by the concrete filling.
  • CH-A-391 245 describes a similar spatial lattice girder.
  • a diagonal is welded there to the bottom of a sheet metal rail.
  • This lattice girder is therefore not sufficiently stiffened in the lateral direction, so that no larger spans can be achieved with loads in the direction of its height.
  • the substantially U-shaped profiled sheet metal rail has waves on its inner surface which are intended to increase the surface area and thus to increase the bond strength with a pressure-resistant material inserted into the sheet metal rail. There u. a. Profiling of the sheet metal rail recommended in such a way that the side flanks of the sheet metal rail run back approximately semicircularly into the interior of the sheet metal rail.
  • DE-A-2446733 describes a composite ceiling consisting of a tension belt consisting of steel and also serving as formwork and a pressure belt consisting of concrete.
  • a tension belt consisting of steel and also serving as formwork
  • a pressure belt consisting of concrete.
  • the surfaces of the steel plates facing the concrete are provided with knobs. These knobs thus serve to improve the bond in the area of a tension element of a continuous rib ceiling.
  • the object of the invention is to further develop it in such a way that the mounting span is significantly improved by improving the bond between the sheet metal rail and the concrete entered and deformed into the sheet metal rail under loads in all directions.
  • the invention is characterized in that the sheet metal rail is provided over its length with projections arranged both in the longitudinal direction of the sheet metal rail and in the transverse direction of the sheet metal rail, which protrude into the interior of the sheet metal rail, and that the distance between the upper edges of the sheet metal rail at least Is 8 cm, so that a concrete with additives of usual grain sizes can be entered into the sheet metal rail.
  • the side walls of the sheet metal rail to the interior of the sheet in a manner known per se rail are inclined and their upper edges are angled inwards. This also improves the bond between the concrete and the sheet metal rail when the load is applied in the vertical direction. So that the shear-resistant bond achieved by the specified measures is maintained even with larger loads, a certain kink resistance must be ensured for the sheet metal rail.
  • the bottom of the sheet metal rail has a continuous bead in the longitudinal direction. The bending of the sheet metal rail serves the same purpose.
  • the projections can be designed in several ways, for example as tongues or knobs. It is preferred if the projections are designed as knobs pointing into the interior of the sheet metal rail, as is known per se, because this results in high shear surfaces on the knobs.
  • An upper chord 1 consists of a support-shaped sheet metal rail with a bottom 2 and side walls 3. Diagonals 4 are welded to the outer sides of the side walls 3. In the exemplary embodiment shown, these are wave-shaped, as can best be seen in FIG. 2. In the area of the lower ends of the diagonals, lower chord rods 5 are welded to the diagonals.
  • the bottom 2 and the side walls 3 of the upper flange have knobs 6 which are arranged at intervals from one another and point into the interior of the sheet metal rail.
  • the clear distance 7 between the upper edges 8 of the side walls 3 of the upper chord is at least 8 cm.
  • the sheet metal rail can also have bevels 10 on the upper edges of the side walls 3, in the floor 2 a continuous bead 11 in the longitudinal direction or other conventional stiffeners in the longitudinal and / or transverse direction .

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Claims (4)

1. Poutre en treillis tridimensionnelle comportant une membrure supérieure (1) constituée par un profilé en tôle ouvert vers le haut et pourvu d'un fond (2) et de parois latérales (3) servant à recevoir du béton (9) sur lesdites parois latérales (3), duquel sont soudées extérieurement des diagonales (4) assurant chaque fois la liaison de la membrure supérieure (1) avec une barre (5) de membrure inférieure, caractérisée en ce que le profilé en tôle est pourvu sur sa longueur de saillies disposées à intervalles aussi bien dans la direction longitudinale que dans la direction transversale du profilé en tôle et qui pénètrent dans son volume intérieur et en ce que la distance (7) entre les bords supérieurs (8) du profilé en tôle est d'au moins 8 cm de sorte qu'un béton contenant des additifs de granulométrie classique peut être introduit dans le profilé en tôle.
2. Poutre en treillis selon la revendication 1, caractérisée en ce que les saillies sont agencées sous la forme de bossages (6) pénétrant dans le volume intérieur du profilé en tôle.
3. Poutre en treillis selon l'une des revendications 1 ou 2, caractérisée en ce que les parois latérales (3) du profilé en tôle sont inclinées vers le volume intérieur dudit profilé et en ce que leurs bords supérieurs (15) sont pliés vers l'intérieur.
4. Poutre en treillis selon l'une des revendications 1 à 3, caractérisée en ce que le fond (2) du profilé en tôle comporte une rainure (11) continue dans la direction longitudinale.
EP79104219A 1979-10-30 1979-10-30 Poutre en treillis tridimensionelle Expired EP0027832B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE7979104219T DE2964741D1 (en) 1979-10-30 1979-10-30 Three-dimensional lattice girder
AT79104219T ATE2453T1 (de) 1979-10-30 1979-10-30 Raeumlicher gittertraeger.
EP79104219A EP0027832B1 (fr) 1979-10-30 1979-10-30 Poutre en treillis tridimensionelle
NO801928A NO801928L (no) 1979-10-30 1980-06-27 Tredimensjonal gitterbjelke.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP79104219A EP0027832B1 (fr) 1979-10-30 1979-10-30 Poutre en treillis tridimensionelle

Publications (2)

Publication Number Publication Date
EP0027832A1 EP0027832A1 (fr) 1981-05-06
EP0027832B1 true EP0027832B1 (fr) 1983-02-09

Family

ID=8186225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104219A Expired EP0027832B1 (fr) 1979-10-30 1979-10-30 Poutre en treillis tridimensionelle

Country Status (3)

Country Link
EP (1) EP0027832B1 (fr)
AT (1) ATE2453T1 (fr)
DE (1) DE2964741D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669243A (en) * 1985-11-06 1987-06-02 Truswal Systems Corporation Fire protective system and method for a support structure
SI2189586T1 (sl) * 2008-11-19 2011-08-31 Cobiax Technologies Ag Panelni element z armaturo

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1231873B (de) * 1960-08-27 1967-01-05 Bautechnik Anstalt Traeger fuer Bauzwecke
BE597004A (fr) * 1960-11-14 1961-03-01 Jacques Werman Elément de construction, son procédé de fabrication et ses applications.

Also Published As

Publication number Publication date
DE2964741D1 (en) 1983-03-17
EP0027832A1 (fr) 1981-05-06
ATE2453T1 (de) 1983-03-15

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