EP1724406A2 - Elément de plancher en béton et coffrage correspondant - Google Patents

Elément de plancher en béton et coffrage correspondant Download PDF

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Publication number
EP1724406A2
EP1724406A2 EP06010126A EP06010126A EP1724406A2 EP 1724406 A2 EP1724406 A2 EP 1724406A2 EP 06010126 A EP06010126 A EP 06010126A EP 06010126 A EP06010126 A EP 06010126A EP 1724406 A2 EP1724406 A2 EP 1724406A2
Authority
EP
European Patent Office
Prior art keywords
ceiling element
concrete
formwork
reinforcement
element according
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.)
Withdrawn
Application number
EP06010126A
Other languages
German (de)
English (en)
Other versions
EP1724406A3 (fr
Inventor
Bruno O Dipl.-Ing. Fritz (FH)
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1724406A2 publication Critical patent/EP1724406A2/fr
Publication of EP1724406A3 publication Critical patent/EP1724406A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/02—Moulds with adjustable parts specially for modifying at will the dimensions or form of the moulded article
    • 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
    • E04B5/10—Load-carrying floor structures formed substantially of prefabricated units with metal beams or girders, e.g. with steel lattice girders

Definitions

  • the invention relates to a concrete ceiling element, which is prefabricated with a projecting reinforcement in a formwork, as well as an associated formwork for producing such a ceiling element.
  • Such ceiling elements made of concrete are prefabricated in large numbers in concrete plants.
  • a formwork is provided in the form of a production line, in which a reinforcement with spacers is inserted, wherein generally a protruding reinforcement in the form of lattice girders is used.
  • concrete is poured in order to shape the flat concrete slab in sections.
  • a concrete layer of about 8 to 10 cm thick must generally be placed in the level formwork. Especially with larger spans and high loads but also significantly stronger concrete slabs are required to minimize the deflection under load.
  • the invention has for its object to provide a ceiling element made of concrete, which allows a reduced material use with safe static, and to provide a corresponding formwork.
  • a convex concrete slab is created during concrete casting. That means the poured concrete slab in the central region has a greater thickness than in the support areas.
  • the convex elevation points upwards.
  • the ceiling element bends slightly due to its own weight and the subsequent ballast, so that then again results in a largely flat surface of the ceiling element, so taking into account the fürbön in the unloaded state upwardly convex surface of a flat surface approximates.
  • the extent of the convex elevation in the middle region of the concrete slab is thus substantially adapted to the weight and the later provided ballast and also to the shrinkage of the concrete and the span of the ceiling element.
  • the convex elevation in the middle region of the concrete slab per meter span is about 0.2 to 0.5 cm.
  • the corresponding formwork for the production of the ceiling element is then recessed, so slightly trough-shaped.
  • the extent of this concave depression is adjustable, in particular by acting on the main surface of the formwork with at least one hydraulic cylinder.
  • other adjusting elements may be provided, for example wedge surfaces or the like, in order to change the degree of deflection of the formwork body.
  • the reinforcement has at least one arcuate pull rod, which is supported with a plurality of support struts against the concrete slab or the local distribution reinforcement.
  • the tension rod is polygonal-shaped, so each kinked at the junction with the support struts something, so that the free areas of the tie rod between the support struts are each rectilinear.
  • the tie rod is welded or crimped to the section struts, as is known per se from lattice girders.
  • the top chords are cut open to achieve the kinking and thus polygonargenden course.
  • the Trennoder interfaces are then reinforced with structural steel allowances (simple steel rods) before they are cast with concrete, so later poured into the concrete slab.
  • a similar adaptation of the lattice girders can be achieved by varying the distances of the support struts. Thus, these may have greater distances in the central region than in the support area, whereby the lattice girder is designed to be softer in the middle region, but remains up to the static requirements.
  • a cross section through a production line for concrete parts is shown, namely here a ceiling element 1 made of concrete.
  • a formwork 4 For the production of a formwork 4 is provided, the main surface (so-called formwork) deepened to form a convex concrete slab 2 in the central region (concave or convex downwards) is formed.
  • a distribution reinforcement 3c in the form of conventional structural steel mesh is inserted in the concrete slab 2 to be cast.
  • This distributor reinforcement 3c can in this case be fixed by spacers with respect to the formwork skin of the formwork 4 before casting the concrete.
  • the distributor reinforcement 3c is thus adapted to the convex shape of the formwork skin of the formwork 4.
  • the protruding reinforcement 3 at least one arcuate tie rod 3a, which is supported with a plurality of support struts 3b against the reinforcement in the concrete slab 2.
  • the ceiling element 1 is removed from the formwork 4 and rotated by 180 ° (overhead).
  • the structure shown in Figure 2 namely with a convex elevation in the central region of the concrete slab 2.
  • the degree of convex elevation in the central region of the concrete slab 2 is selected in adaptation to the dead weight, the span and the proposed load such, that the ceiling element 1 in the installation or mounting state with attached load (see Fig .. 3) is largely flat, thus approaching a flat surface, as indicated in Fig. 3 and 4 with the horizontal line.
  • the convex elevation of the upper concrete surface of the ceiling element 1 according to FIG. 2, which is exaggerated here thus acts on load, in contrast to its own weight and the load of the deflection that occurs.
  • the tension rod 3a (in general, this is several per ceiling element 1) receives a bias, since first the elevation is reduced to the horizontal and then the deflection from the nuilline acts on further load. This favorable static measure contributes significantly to weight and material reduction.
  • Fig. 3 the loaded state of the ceiling element 1 with a high load, for example, by a patch in the middle cubic block, z. B. a heavy safe 6 shown schematically. This results in consideration of further loads a largely flat surface and thus a flat surface of the ceiling element 1.
  • the drawn here elevations in Fig. 1 and 2 are exaggerated for the purpose of explanation.
  • a rough guideline is given as a measure M (see also Fig. 4) for the convex elevation in the middle region of the concrete slab 2 per meter span about 0.2 to 0.5 cm, of course, concrete shrinkage and creep under load and later provided Loads are to be considered.
  • the degree of convex depression on the formwork or main surface of the formwork 4 is adjustable, in particular by Beschlagung with hydraulic cylinders 5, as indicated in Fig. 1.
  • the crowning or the degree of convexity can be adjusted quickly, even within a production line.
  • Fig. 4 two modified versions of the protruding reinforcement 3 for the ceiling element 1 are shown. While in Fig. 1 to 3 of the pull rod 3a is arcuate, this is polygonal in Fig. 4, formed above by this is kinked between the connection points to the support struts 3b, but in the free area between the support struts 3a is rectilinear. Thus, a part of a polygon arc is formed.
  • the connection between tie rod 3a and the support struts 3b is preferably welded or pressed, as is known per se from lattice girders.
  • a lattice girder is shown at the same reference numerals for functionally identical components as reinforcement 3, whose upper chords are separated to bend this multiple times for polygonal course, z. B. at the one-third points of the carrier length.
  • reinforcement 3 which are poured later in the concrete slab 2
  • reinforcing steel 3d are used for reinforcement.
  • In the middle region of the lattice girder may also be designed pliable, by the running here in waveform support struts 3b are arranged in their mutual distance larger than in the relatively rigid support area.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Civil Engineering (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Rod-Shaped Construction Members (AREA)
EP06010126A 2005-05-17 2006-05-17 Elément de plancher en béton et coffrage correspondant Withdrawn EP1724406A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200520007959 DE202005007959U1 (de) 2005-05-17 2005-05-17 Deckenelement aus Beton und zugehörige Schalung

Publications (2)

Publication Number Publication Date
EP1724406A2 true EP1724406A2 (fr) 2006-11-22
EP1724406A3 EP1724406A3 (fr) 2008-04-16

Family

ID=36686766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06010126A Withdrawn EP1724406A3 (fr) 2005-05-17 2006-05-17 Elément de plancher en béton et coffrage correspondant

Country Status (2)

Country Link
EP (1) EP1724406A3 (fr)
DE (1) DE202005007959U1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015102455A1 (de) * 2015-02-20 2016-08-25 Christmann & Pfeifer Construction Gmbh & Co. Kg Parkdeckmodul und demontierbares Parkdeck

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE561945A (fr) * 1957-10-26 1957-11-14
DE1941870A1 (de) * 1968-08-19 1970-02-26 Procedes Nouveaux De Construct Verfahren und Vorrichtung zur Herstellung von zwei vorgebogenen Traegern
FR2593536A1 (fr) * 1986-01-27 1987-07-31 Bouygues Sa Structures en beton arme et en acier, notamment pour realiser des poutres et, en particulier, des poutres a usage de pannes.
US4700516A (en) * 1981-11-25 1987-10-20 Keith And Grossman Leasing Company Composite, pre-stressed structural member and method of forming same
FR2600358A2 (fr) * 1986-06-23 1987-12-24 Bouygues Sa Poutres en beton arme et en acier de grande portee
FR2612545A1 (fr) * 1987-03-19 1988-09-23 Laloux Michel Modules de coffrages reutilisables permettant la constitution de formes architecturales variees
JPH07251415A (ja) * 1994-03-15 1995-10-03 Hitachi Ltd 曲線桁用モールド装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1941662B2 (de) * 1968-10-14 1979-02-01 Vyskumnyustav Pozemnich Staveb, Prag Decke
DE2153495A1 (de) * 1971-10-27 1973-05-10 Rheinstahl Ag Fertigteildeckenplatte fuer den montagebau
DE2649936C2 (de) * 1976-10-30 1982-09-16 Kinkel, Horst, Dr.-Ing., 6078 Neu-Isenburg Behälter aus Stahlbeton und Verfahren zur Errichtung desselben
DE3723629A1 (de) * 1987-07-17 1989-01-26 Johann Dipl Ing Kollegger Verfahren zur herstellung von bewehrten schalen
DE19823610B4 (de) * 1998-05-27 2005-03-31 Florian-Peter Kosche Schaltisch und Verfahren zur Herstellung von doppelt gekrümmten Bauteilen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE561945A (fr) * 1957-10-26 1957-11-14
DE1941870A1 (de) * 1968-08-19 1970-02-26 Procedes Nouveaux De Construct Verfahren und Vorrichtung zur Herstellung von zwei vorgebogenen Traegern
US4700516A (en) * 1981-11-25 1987-10-20 Keith And Grossman Leasing Company Composite, pre-stressed structural member and method of forming same
FR2593536A1 (fr) * 1986-01-27 1987-07-31 Bouygues Sa Structures en beton arme et en acier, notamment pour realiser des poutres et, en particulier, des poutres a usage de pannes.
FR2600358A2 (fr) * 1986-06-23 1987-12-24 Bouygues Sa Poutres en beton arme et en acier de grande portee
FR2612545A1 (fr) * 1987-03-19 1988-09-23 Laloux Michel Modules de coffrages reutilisables permettant la constitution de formes architecturales variees
JPH07251415A (ja) * 1994-03-15 1995-10-03 Hitachi Ltd 曲線桁用モールド装置

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Publication number Publication date
EP1724406A3 (fr) 2008-04-16
DE202005007959U1 (de) 2006-06-29

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