EP0506715B1 - Profiled sheet metal shuttering for composite concrete ceilings - Google Patents

Profiled sheet metal shuttering for composite concrete ceilings Download PDF

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Publication number
EP0506715B1
EP0506715B1 EP91900667A EP91900667A EP0506715B1 EP 0506715 B1 EP0506715 B1 EP 0506715B1 EP 91900667 A EP91900667 A EP 91900667A EP 91900667 A EP91900667 A EP 91900667A EP 0506715 B1 EP0506715 B1 EP 0506715B1
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EP
European Patent Office
Prior art keywords
sheet metal
ribs
profiled sheet
folds
composite concrete
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Expired - Lifetime
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EP91900667A
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German (de)
French (fr)
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EP0506715A1 (en
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Helmut Gerhard Katzenberger
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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
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
    • E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
    • E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
    • E04B5/40—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element with metal form-slabs

Definitions

  • the invention relates to a formwork made of profiled sheet for composite concrete slabs, with downwardly open, mutually parallel ribs with a trapezoidal cross-section and with arranged between the ribs, parallel to these, upwardly directed folds made of sheet metal, the webs of which lie against each other , wherein for the improvement of the bond between the profiled sheet and the concrete at least part of the folds is corrugated in the longitudinal direction.
  • Formwork made of profiled sheet for composite concrete slabs are known, for example, from DE-OS 22 52 988 and from AT-PS 365 267.
  • Such formwork made of profiled sheet has the advantage over a wooden formwork that the lower support required during concreting is less bulky, which leaves space for working under the concrete slab. It is also advantageous that the profiled sheet absorbs tensile stresses on the lower surface of the finished concrete slab, whereby the thickness of the concrete slab can be reduced.
  • the folds pointing upwards have indentations of various types. So shows z. B. the AT-PS 365 267 folds, which are provided with compression depressions on the upper edge of the fold. Using these compression depressions, attempts were made to improve the adhesion between the concrete and the formwork made of profiled sheet metal.
  • Swiss patent specification 644 922 describes a formwork made of profiled sheet metal with parallel ribs and folds arranged between the ribs, which are formed by two webs lying flat against one another. The folds only have deformations at their upper edges, which should help to improve the bond between the concrete and the metal sheet.
  • the object of the invention is to improve a formwork of profiled sheet of the type mentioned in such a way that the bond between the profiled sheet and the concrete is improved.
  • the free edge of the folds describes an approximately horizontal wave in which the ratio of amplitude to half the wavelength is between 0.01 and 0.07.
  • one embodiment of the invention provides that a fold is arranged off-center between every two ribs.
  • FIG. 1 shows a schematic diagram of the composite concrete floor
  • FIG. 2 shows a top view of a fold
  • FIG. 3 shows a section through a profiled sheet
  • FIG. 4 shows a section through stacked profiled sheets.
  • the support beams, on which the profiled sheets are placed next to one another during the production of a ceiling, are not shown in the figures of the drawing, since they are designed according to the known prior art.
  • the profile sheets can also be connected to one another in a conventional manner by spot welding.
  • each profiled sheet 1 has ribs 3 pointing upwards towards the concrete 2.
  • the ribs 3 are parallel to each other and open at the bottom. In the exemplary embodiment, they have a trapezoidal cross section, the longer of the two parallel trapezoidal sides being at the top.
  • these folds 4 are continuously corrugated in the longitudinal direction.
  • the corrugation is such that the upper fold edge 5 deviates the furthest from the vertical longitudinal central plane of the fold 4, while the lower fold edge 6 lies practically in the vertical longitudinal central plane of the fold 4.
  • the ratio of the amplitude a of a wave described by the upper fold edge 5 to the half wavelength 1/2 of the fold 4 is between 0.01 and 0.07, advantageously around 0.033.
  • the ratio of the web height d of a fold 4 to the height h of a rib 3 is between 0.2 and 0.6, advantageously around 0.3.
  • the profiled sheet 1 is firmly anchored in the concrete 2.
  • the profiled sheets 1, as shown in FIG. 4 can be stacked one inside the other.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Macromonomer-Based Addition Polymer (AREA)

Abstract

Profiled sheet metal shuttering (1) for composite concrete ceilings (2) has parallel ribs (3) of trapezoidal cross-section which open downward and folds (4) in the sheet metal which open upward between the ribs (3). The folds (4) are corrugated in the longitudinal direction. The amplitudes of the generatrices of the corrugations reach a maximum at the free, upper edge (5) of the fold and decrease to zero at the lower edge (6). The ratio of the amplitude (a) to the half-wavelength (1/2) at the upper edge (5) of the fold is between 0.01 and 0.07.

Description

Die Erfindung bezieht sich auf eine Schalung aus Profilblech für Betonverbunddecken, mit nach unten offenen, zueinander parallelen Rippen mit trapezförmigem Querschnitt und mit zwischen den Rippen angeordneten, zu diesen parallel verlaufenden, nach oben gerichteten, aus dem Blech gebogenen Falten, deren Stege aneinander an liegen, wobei für die Verbesserung des Verbundes zwischen dem Profilblech und dem Beton mindestens ein Teil der Falten in Längsrichtung gewellt ist.The invention relates to a formwork made of profiled sheet for composite concrete slabs, with downwardly open, mutually parallel ribs with a trapezoidal cross-section and with arranged between the ribs, parallel to these, upwardly directed folds made of sheet metal, the webs of which lie against each other , wherein for the improvement of the bond between the profiled sheet and the concrete at least part of the folds is corrugated in the longitudinal direction.

Schalungen aus Profilblech für Betonverbunddecken sind beispielsweise aus der DE-OS 22 52 988 und aus der AT-PS 365 267 bekannt. Eine derartige Schalung aus Profilblech hat gegenüber einer Holzverschalung den Vorteil, daß die während des Betonierens erforderliche untere Abstützung weniger sperrig ist, womit unter der Betonplatte Platz zum Arbeiten verbleibt. Weiters ist es vorteilhaft, daß das Profilblech an der unteren Fläche der fertiggestellten Betonplatte Zugspannungen aufnimmt, wodurch die Stärke der Betonplatte verringert werden kann. Zur Aufnahme von Zugbeanspruchungen, die in der Ebene der Betonplatte vorkommen, weisen die nach oben gerichteten Falten Einbeulungen verschiedener Art auf. So zeigt z. B. die AT-PS 365 267 Falten, die mit Stauchvertiefungen am oberen Faltenrand versehen sind. Mittels dieser Stauchvertiefungen versuchte man die Haftung zwischen dem Beton und der Schalung aus Profilblech zu verbessern.Formwork made of profiled sheet for composite concrete slabs are known, for example, from DE-OS 22 52 988 and from AT-PS 365 267. Such formwork made of profiled sheet has the advantage over a wooden formwork that the lower support required during concreting is less bulky, which leaves space for working under the concrete slab. It is also advantageous that the profiled sheet absorbs tensile stresses on the lower surface of the finished concrete slab, whereby the thickness of the concrete slab can be reduced. In order to absorb tensile loads that occur in the plane of the concrete slab, the folds pointing upwards have indentations of various types. So shows z. B. the AT-PS 365 267 folds, which are provided with compression depressions on the upper edge of the fold. Using these compression depressions, attempts were made to improve the adhesion between the concrete and the formwork made of profiled sheet metal.

Es ist jedoch statisch erwiesen, daß die Zugspannungen am unteren Rand der Falte am größten und am oberen Rand der Falte am kleinsten sind. Die Stauchvertiefungen gemäß der genannten AT-PS befinden sich daher statisch gesehen an einer ungünstigen Stelle der Falte.However, it has been shown statically that the tensile stresses are greatest at the lower edge of the fold and smallest at the upper edge of the fold. The upsetting depressions according to the mentioned AT-PS are therefore statically seen at an unfavorable point of the fold.

Die Schweizer Patentschrift 644 922 beschreibt eine Schalung aus Profilblech mit parallelen Rippen und zwischen den Rippen angeordneten Falten, die von zwei flach aneinander anliegenden Stegen gebildet werden. Die Falten weisen lediglich an ihren oberen Rändern Verformungen auf, die helfen sollen, den Verbund zwischen Beton und Metallblech zu verbessern.Swiss patent specification 644 922 describes a formwork made of profiled sheet metal with parallel ribs and folds arranged between the ribs, which are formed by two webs lying flat against one another. The folds only have deformations at their upper edges, which should help to improve the bond between the concrete and the metal sheet.

Aus der DE-OS 36 28 861 ist eine Schalung aus Profilblech für Betonverbunddecken mit nach unten offenen, zueinander parallelen Rippen der eingangs erwähnten Art bekannt. Zwischen den Rippen verlaufen aus dem Blech gebogene Falten. Die Falten sind in Längsrichtung gewellt.From DE-OS 36 28 861 a formwork made of profiled sheet for composite concrete slabs with downwardly open, mutually parallel ribs of the type mentioned is known. Wrinkles made of sheet metal run between the ribs. The folds are corrugated in the longitudinal direction.

Aufgabe der Erfindung ist es, eine Schalung aus Profilblech der eingangs erwähnten Art dahingehend zu verbessern, daß der Verbund zwischen dem Profilblech und dem Beton verbessert wird.The object of the invention is to improve a formwork of profiled sheet of the type mentioned in such a way that the bond between the profiled sheet and the concrete is improved.

Dies wird erfindungsgemäß dadurch erreicht, daß der freie Rand der Falten eine etwa horizontale Welle beschreibt, bei der das Verhältnis von Amplitude zur halben Wellenlänge zwischen 0,01 und 0,07 liegt.This is achieved according to the invention in that the free edge of the folds describes an approximately horizontal wave in which the ratio of amplitude to half the wavelength is between 0.01 and 0.07.

Praktische Versuche haben ergeben, daß nur, wenn das Verhältnis Amplitude zur Wellenlänge innerhalb dieses Bereiches liegt, der optimale Verbund zwischen Schalung und Beton erreicht wird.Practical tests have shown that the optimum bond between formwork and concrete can only be achieved if the ratio of amplitude to wavelength lies within this range.

Um das Stapeln der Schalung zu erleichtern, ist in einem Ausführungsbeispiel der Erfindung vorgesehen, daß zwischen je zwei Rippen eine Falte außermittig angeordnet ist.In order to facilitate the stacking of the formwork, one embodiment of the invention provides that a fold is arranged off-center between every two ribs.

Nachfolgend wir ein Ausführungsbeispiel der Erfindung anhand der Figuren der beiliegenden Zeichnung beschrieben.An exemplary embodiment of the invention is described below with reference to the figures in the accompanying drawing.

Die Fig. 1 zeigt ein schematisch gehaltenes Schaubild der Betonverbunddecke, die Fig. 2 zeigt eine Draufsicht auf eine Falte, die Fig. 3 zeigt einen Schnitt durch ein Profilblech und die Fig. 4 zeigt einen Schnitt durch gestapelte Profilbleche.1 shows a schematic diagram of the composite concrete floor, FIG. 2 shows a top view of a fold, FIG. 3 shows a section through a profiled sheet and FIG. 4 shows a section through stacked profiled sheets.

Die Trägerbalken, auf die bei der Herstellung einer Decke die Profilbleche nebeneinander aufgelegt werden, sind in den Figuren der Zeichnung nicht gezeigt, da sie nach dem bekannten Stand der Technik ausgeführt sind. Die Profilbleche können ebenso in herkömmlicher Weise durch Punktschweißen miteinander verbunden sein.The support beams, on which the profiled sheets are placed next to one another during the production of a ceiling, are not shown in the figures of the drawing, since they are designed according to the known prior art. The profile sheets can also be connected to one another in a conventional manner by spot welding.

Wie aus den Figuren ersichtlich, weist jedes Profilblech 1 nach oben zum Beton 2 weisende Rippen 3 auf. Die Rippen 3 sind zueinander parallel und nach unten offen. Im Ausführungsbeispiel haben sie Trapezquerschnitt, wobei die längere der beiden parallelen Trapezseiten oben ist.As can be seen from the figures, each profiled sheet 1 has ribs 3 pointing upwards towards the concrete 2. The ribs 3 are parallel to each other and open at the bottom. In the exemplary embodiment, they have a trapezoidal cross section, the longer of the two parallel trapezoidal sides being at the top.

Zwischen den Rippen 3 sind ebenfalls nach oben zum Beton 2 gebogene Falten 4 vorgesehen.Between the ribs 3, folds 4 bent upwards towards the concrete are also provided.

Diese Falten 4 sind im Ausführungsbeispiel durchgehend in Längsrichtung gewellt ausgeführt.In the exemplary embodiment, these folds 4 are continuously corrugated in the longitudinal direction.

Die Wellung ist derart, daß der obere Faltenrand 5 am weitesten von der lotrechten Längsmittelebene der Falte 4 abweicht, während der untere Faltenrand 6 praktisch in der lotrechten Längsmittelebene der Falte 4 liegt.The corrugation is such that the upper fold edge 5 deviates the furthest from the vertical longitudinal central plane of the fold 4, while the lower fold edge 6 lies practically in the vertical longitudinal central plane of the fold 4.

Das Verhältnis der Amplitude a einer vom oberen Faltenrand 5 beschriebenen Welle zur halben Wellenlänge l/2 der Falte 4 liegt erfindungsgemäß zwischen 0,01 und 0,07, vorteilhaft bei etwa 0,033.According to the invention, the ratio of the amplitude a of a wave described by the upper fold edge 5 to the half wavelength 1/2 of the fold 4 is between 0.01 and 0.07, advantageously around 0.033.

Das Verhältnis der Steghöhe d einer Falte 4 zur Höhe h einer Rippe 3 liegt zwischen 0,2 und 0,6, vorteilhaft bei etwa 0,3.The ratio of the web height d of a fold 4 to the height h of a rib 3 is between 0.2 and 0.6, advantageously around 0.3.

Nachdem der vergossene Beton abgebunden hat, ist das Profilblech 1 fest im Beton 2 verankert.After the poured concrete has set, the profiled sheet 1 is firmly anchored in the concrete 2.

Da die Falten 4 jeweils um das Maß f von der Mitte zwischen zwei benachbarten Rippen 3 versetzt sind, können die Profilbleche 1, wie in der Fig. 4 gezeigt, ineinander gestapelt werden.Since the folds 4 are offset by the dimension f from the center between two adjacent ribs 3, the profiled sheets 1, as shown in FIG. 4, can be stacked one inside the other.

Claims (6)

  1. Profiled sheet metal shuttering for composite concrete ceilings, with downwardly open ribs which are parallel to each other with a trapeziform cross-section, and with folds bent from the sheet metal arranged between the ribs and running parallel thereto, which project upwardly, the webs of which lie close together, wherein in order to improve the connection between the profiled sheet metal and the concrete at least a part of the folds is corrugated in the longitudinal direction, characterised in that the free edge (5) of the folds (4) describes an approximately horizontal wave, the ratio of the amplitude (a) to the half wave length (l/2) of which is between 0.01 and 0.07.
  2. Profiled sheet metal shuttering for composite concrete ceilings according to claim 1, characterised in that the ratio of the amplitude (a) to the half wave length (l/2) is approximately 0.033.
  3. Profiled sheet metal shuttering for composite concrete ceilings particularly according to claim 1 or 2, with downwardly open ribs which are parallel to each other with a trapeziform cross-section and with folds bent from the sheet metal arranged between the ribs and running parallel thereto which project upwardly, the webs of which lie close together, which are provided with shaping in order to improve the connection between the profiled sheet metal and the concrete, characterised in that between every two ribs (3) a fold (4) is arranged off-centre.
  4. Profiled sheet metal shuttering for composite concrete ceilings according to claim 3, characterised in that all the folds (4) are offset by the same amount (f), in the same direction, from the centre between two ribs (3).
  5. Profiled sheet metal shuttering for composite concrete ceilings according to at least one of claims 1 to 4, characterised in that the ratio of the height (d) of the folds (4) to the height (h) of the ribs (3) is between 0.2 and 0.6.
  6. Profiled sheet metal shuttering for composite concrete ceilings according to claim 5, characterised in that the ratio of the height (d) of the folds (4) to the height (h) of the ribs (3) is approximately 0.3.
EP91900667A 1989-12-19 1990-12-18 Profiled sheet metal shuttering for composite concrete ceilings Expired - Lifetime EP0506715B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT287689 1989-12-19
AT2876/89 1989-12-19
PCT/AT1990/000124 WO1991009185A1 (en) 1989-12-19 1990-12-18 Profiled sheet metal shuttering for composite concrete ceilings

Publications (2)

Publication Number Publication Date
EP0506715A1 EP0506715A1 (en) 1992-10-07
EP0506715B1 true EP0506715B1 (en) 1994-11-02

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EP91900667A Expired - Lifetime EP0506715B1 (en) 1989-12-19 1990-12-18 Profiled sheet metal shuttering for composite concrete ceilings

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EP (1) EP0506715B1 (en)
AT (1) ATE113686T1 (en)
DE (1) DE59007660D1 (en)
WO (1) WO1991009185A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100362179C (en) * 2002-12-22 2008-01-16 邱则有 Component for cast-in-situ reinforced concrete
WO2006064989A1 (en) * 2004-12-16 2006-06-22 B.B.M Korea Co., Ltd Deck plate for reinforced concrete structure and structure construction method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3812636A (en) * 1971-05-26 1974-05-28 Robertson Co H H Sheet metal decking unit and composite floor construction utilizing the same
DE2252988A1 (en) * 1972-10-28 1974-05-09 Bernhard Dr Ing Unger COMPOSITE PANEL MADE OF CONCRETE AND A TRAPEZOIDAL SHEET
AT390093B (en) * 1985-08-27 1990-03-12 Katzenberger Helmut PROFILE SHEET FOR CONCRETE COMPOSITE CEILINGS
AT390095B (en) * 1985-11-13 1990-03-12 Katzenberger Helmut Shuttering arrangement comprising profiled metal sheet for concrete composite floors
PT83026A (en) * 1986-07-21 1987-01-26 Pentti Vainionpaa Compound slab section

Also Published As

Publication number Publication date
ATE113686T1 (en) 1994-11-15
EP0506715A1 (en) 1992-10-07
WO1991009185A1 (en) 1991-06-27
DE59007660D1 (en) 1994-12-08

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