EP1786990B1 - Dalle ou plancher en beton arme a corps creux - Google Patents

Dalle ou plancher en beton arme a corps creux Download PDF

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Publication number
EP1786990B1
EP1786990B1 EP05775015.0A EP05775015A EP1786990B1 EP 1786990 B1 EP1786990 B1 EP 1786990B1 EP 05775015 A EP05775015 A EP 05775015A EP 1786990 B1 EP1786990 B1 EP 1786990B1
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EP
European Patent Office
Prior art keywords
concrete
hollow body
double
dome
spacers
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.)
Active
Application number
EP05775015.0A
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German (de)
English (en)
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EP1786990A1 (fr
Inventor
Wilhelm Häussler
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.)
BAM AG
Original Assignee
BAM AG
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
Priority claimed from DE200420012814 external-priority patent/DE202004012814U1/de
Priority claimed from DE200520004622 external-priority patent/DE202005004622U1/de
Application filed by BAM AG filed Critical BAM AG
Publication of EP1786990A1 publication Critical patent/EP1786990A1/fr
Application granted granted Critical
Publication of EP1786990B1 publication Critical patent/EP1786990B1/fr
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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
    • E04C5/0645—Shear reinforcements, e.g. shearheads for floor slabs
    • 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
    • E04B5/326—Floor structures wholly cast in situ with or without form units or reinforcements with hollow filling elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
    • E04C5/203—Circular and spherical spacers

Definitions

  • the present invention relates to a reinforced concrete slab or - ceiling with arranged between the hollow bodies concrete webs and with a reinforcement layer over the hollow bodies and with a reinforcement layer under the hollow bodies. It further relates to a buoyancy-free hollow body for the production of such reinforced concrete hollow slabs or ceilings, which is designed as buoyancy-free, downwardly open and circumferentially closed container, in the ceiling wall vent holes are optionally provided, wherein the container has spacers. It further relates to a reinforced concrete hollow slab or blanket, which has said hollow body.
  • a reinforced concrete slab is from the EP 1 252 403 A1 known.
  • hollow body as for example in the Scriptures DE 200 04 140 U1 are described.
  • Each reinforcement layer consists of two superimposed layers of parallel reinforcing bars, wherein the bars of a reinforcing layer with respect to those of the other layer are twisted by an angle of preferably 90 degrees.
  • These reinforcements in conjunction with the pressure-resistant concrete, are intended to produce a bend-resistant plate / blanket capable of absorbing the local bending moments.
  • a panel / ceiling is also exposed to internal, vertical shear forces, ie shear forces.
  • the ability of a non-reinforced in the concrete webs hollow body plate / blanket for the removal of shear forces is severely limited due to the low computationally fixed concrete tensile strength and the cross-sectional weakening by the hollow body.
  • the object of the invention is to provide a cost-effective reinforced concrete - hollow slab or - ceiling with favorable structural behavior and with increased local ability to increase the ability to shear forces.
  • the object is achieved by a hollow body according to claim 7 and its use according to claim 1.
  • the invention thus provides, in addition to the already known instrument of vertical reinforcement in the concrete ridge nodes, further instruments which can be combined with this vertical reinforcement or with one another in order to adapt the lateral force carrying capacity of the locally existing load.
  • the said reinforcing instruments can be combined with each other and with those in the European patent application EP 1 252 403 A1 combine vertical reinforcements mentioned in the concrete web nodes, so that advantageously an increase in the lateral force capacity of the plate / ceiling can be achieved in the locally required extent.
  • combination possibilities for increasing the lateral force carrying capacity result.
  • hook monobloc anchors are installed in concrete ridge knots and / or in a concrete bridge as a vertical reinforcement and / or Stahlzugstreben.
  • These are rods made of reinforced ribbed steel with ribbed surface, the tensile force in the anchor below a, preferably as a flat cone, have head, as it double head anchor have two, and above for tensile force in the anchor have a hook, which installed a bar of the armor layer over surrounds the hollow bodies.
  • Z- or U-shaped bracket installed whose long enough for anchoring the tensile force in the bracket horizontal end leg at least each encompass the inner layer of the upper and lower horizontal armor layer.
  • This embodiment has the particular advantage of being able to set high computational lateral force capacity of reinforced concrete reinforced concrete components according to the reinforced concrete standards DIN 1045-1 and EC 2, and advantageously uses reinforcing bars that are simple and inexpensive to produce from reinforcing steel.
  • U and in particular Z-brackets have the advantage of being easy to install after laying the upper horizontal reinforcement layer.
  • the embodiment of arranging the vertical reinforcement in the concrete webs advantageously allows to reduce the horizontal spacing of the vertical reinforcing bars, where necessary, and thus to achieve increased lateral force carrying capacity.
  • a vertical reinforcing bar according to the invention is to be understood as meaning a single vertical reinforcing bar or a group of vertical reinforcing bars standing next to one another, which are sufficiently anchored in the concrete at the top and bottom, for example iron curved in the shape of a hat.
  • shear reinforcements in the form of so-called shear allowances between the upper and lower horizontal reinforcing layers can be avoided with the invention. These are less stable than bow or double headed anchors. Usual push supplements with tied or welded reinforcing bars are also consuming to manufacture and interfere with the installation of spacers between the hollow bodies.
  • the embodiment of the invention which uses hook mono-head anchors, offers particular advantages. Because a hook-mono head anchor is inexpensive to manufacture and grants a quick installation, since it is hung only on a bar of the reinforcement layer on the hollow bodies and, against slipping when concreting, must be connected by means of reinforcing tie wire with this.
  • the use of fiber concrete is advantageous because it the splitting tensile strength of the building material and thus the namely Carrying capacity of the printed diagonals increases in shearing stress adjusting internal framework.
  • Steel fibers are advantageously commercially available and can be procured at short notice. They are advantageously fully automatically produced inexpensively and also the introduction into the concrete is inexpensive. If the fibers, according to one embodiment, added only to the concrete for the concrete webs, the amount of fibers required reduces cost.
  • the object of the invention is, as already mentioned, achieved by a buoyancy-free hollow body according to claim 7, that the buoyancy-free hollow body has a conical or truncated pyramid-shaped circumference, the upper end forms a dome-like vault.
  • This geometric shape has over the conical containers used in practice greater stability for receiving the vertical loads, z.
  • weight of the upper reinforcement and fresh concrete in assembly work, reinforcement and concreting. When introducing concrete, this can be distributed quickly due to the aerodynamic shape.
  • due to the dome-like shape of the hollow body in the area above the hollow body in the hardened concrete, a statically favorable vault magnitude effect arises if this area is loaded by vertical loads.
  • the hollow bodies as upper spacers at least three radially arranged ribs, preferably offset by equal angles, are provided, which are integrally formed on the dome-like vault.
  • the buoyancy-free hollow body preferably made of recyclable plastic
  • the radially arranged ribs can be made together with the hollow body in one operation. This reduces the manufacturing costs and assembly times on the construction site.
  • the spacers also make it possible to use a particularly advantageous rollable reinforcement. As a result, the assembly time and thus the costs can be further reduced.
  • the buoyancy-free hollow body has an annular shoulder in the area between the conical or truncated pyramid-shaped circumference towards the dome-shaped arch. This allows the arrangement of several hollow body in the demand for a larger ceiling height.
  • the upper hollow body is then adapted in its lower opening diameter to the diameter of the annular shoulder of the lower hollow body. Depending on the static requirements so ceilings of different heights can be created without major installation effort.
  • the dome-like vault of the hollow body in cross section has approximately the shape of a half ellipse.
  • a foot ring forms the lower end of the hollow body. This increases the stability of the hollow body during assembly and also increases its stability.
  • Distanzianssbügel are distributed as lateral spacers to other hollow bodies evenly over the circumference of the hollow body, are arranged. They serve the simple and secure positioning and fixation of the raised hollow bodies on the lower reinforcement layer.
  • the Distanzianssbügel are U-shaped and preferably have a catch. With a safety catch is achieved that the complex wiring of the hollow body eliminated with each other and thereby the assembly times can be additionally shortened.
  • the molded in the dome-like vault spacers continue radially towards the periphery as a bead. Further advantageous embodiments are described in the subclaims.
  • hollow bodies can be stacked on top of each other in an intermeshing manner by means of suitable shaping during transport and storage.
  • the upper and the lower contour of the hollow body must be coordinated.
  • Z. b. bottom edges are provided by stacking webs, in which stacked hollow bodies sit one above the other.
  • stacking webs are arranged under the annular shoulder.
  • the stack webs improve the ability of the hollow body to accommodate vertical loads.
  • the object of the invention is finally particularly advantageous, as already mentioned by the use of a hollow body according to claim 7 in a reinforced concrete hollow slab or ceiling according to claim 1,
  • Such a reinforced concrete hollow body plate is advantageously further developed by the features of claim 1.
  • FIG. 1a is a part of a hollow body cover 1 in vertical section and in Fig. 1 b shown in plan view, with the air space in them enclosing hollow bodies 2, the reinforcement layer 3 on the hollow bodies and the reinforcement layer 4 under the hollow bodies.
  • Both reinforcing layers consist of two superimposed layers of reinforcing bars one above the other.
  • the hollow bodies 2 are arranged so that the axes of the concrete webs 5 between the hollow bodies 2 in the plan form a hexagonal honeycomb structure.
  • the vertical reinforcing bars 6, between which the steel struts 7 and diagonal crosses 8, not in the concrete ridge knots but in the concrete webs between two concrete ridge nodes are arranged. It is also possible that the vertical reinforcing bars 6 omitted.
  • FIGS. 2a to 2e show different configurations and under transverse force load 9 each case adjusting truss system consisting of steel struts 6, 7, 8 and concrete pressure struts 10, 11. Contrary to the simplified graphic representation of FIGS. 2a to 2e In fact, the trusses of the individual concrete webs are not all in the same vertical plane, but in the vertical planes through the vertical reinforcing bars 6 or through the concrete truss axles which lie in the vertical plane Fig. 1 are shown in plan view. Thus, the actual, formed by the steel struts and concrete pressure diagonal truss system is spatially, not even.
  • FIG. 2a shows the reinforcement system similar to that of the EP 1 252 403 A1 known system, but with vertical reinforcements, for example, hook-mono head anchors, Z-brackets or U-brackets instead of double-headed anchors or double-headed anchors in the concrete webs between the concrete web nodes, each with or without fiber reinforcement in the concrete.
  • the printed diagonal 10 is made of concrete or fiber concrete.
  • FIG. 2b shows the design with double-headed anchors 7 only in the inclined tension struts of adjusting inner truss structure.
  • here forms a framework with pressurized, approximately vertical bars of concrete 11 and two diagonals - a tensile steel 7 and a pressure-loaded concrete 10 - in this concrete bar from.
  • Figure 2d are the concrete pressure diagonals 10 of the system of FIG. 2a reinforced by here double-headed anchor 7 pressure-stressed in the axis of this pressure diagonal.
  • FIG. 3a shows an embodiment of the invention with hook mono-head anchor as a vertical reinforcement 12 in a concrete ridge node or a concrete bridge
  • FIG. 3b an embodiment of the invention with hook mono-head anchor as inclined Stahlzugstrebe 13 in a concrete bridge.
  • the hook mono-head anchor will be installed over a bar of the reinforcement layer hung over the hollow bodies and fixed by means of reinforcing binding wire to this rod.
  • FIG. 4 shows an embodiment of the invention with Z-brackets 14 or U-brackets 15 as vertical reinforcing bars 6 in a concrete ridge node or a concrete ridge. 5
  • FIG. 5 shows the perspective view of the hollow body according to the invention 2. Its circumference 17 is closed.
  • the illustrated hollow body 2 has a circular shape, wherein the hollow body is formed open at the bottom. The lower opening is bounded by a foot ring 22 which is integrally formed on the circumference 17.
  • the designed as a truncated cone circumference 17 continues upward into a horizontal annular shoulder 20, which then merges into the initially approximately vertical wall of a closed approximately elliptical dome-shaped vault 18.
  • Symmetrical to an imaginary vertical hollow body axis 28 facing radially outward upper spacers 19 are integrally formed on the dome.
  • the upper crest lines 29 are straight and lie in a direction parallel to the foot ring 22 parallel plane.
  • the invention also extends to bodies with a truncated pyramid-shaped circumference, for example with a hexagonal base.
  • the rib-shaped upper spacers 19 sweep from the center radially outwardly in about three quarters of the diameter of the foot ring 22. They then go over each in a bead 25 which is formed in the approximately elliptical dome-shaped vault 18. This bead 25 ends in turn on the annular shoulder 20. In this way, reinforce the upper spacers in conjunction with the bead 25, the dome-like vault 18th They are so long that all rods of the lower layer of the upper reinforcement layer 3 from the hollow body 2 and its neighbors are sufficiently supported.
  • vent holes 16 are provided symmetrically to the vertical hollow body axis 28.
  • FIG. 6 shows a cross section of the hollow body 2 with integrally formed spacers 19 in a built-in situation.
  • the foot ring 22 sits on.
  • the hollow body 2 is surrounded on all sides with concrete 30.
  • the concrete upper edge of the penetrating into the hollow body 2 from below concrete 30 is indicated by the reference numeral 31.
  • the casting of the concrete 30 is facilitated by the slope of the dome-like vault 18 and the radially disposed ribs 19, since the hollow body 2 can be easily flown around.
  • the radially arranged ribs 19 are separated from each other and not concentric converging, as in the Fig. 5 and Fig. 7 shown.
  • FIG. 7 shows a plan view of a hollow body according to the invention 2 with radially arranged spacers 19.
  • vent holes 16 are arranged on the surface of the dome-like vault 18 of the hollow body 2.
  • the radially arranged ribs 19 are arranged in a star shape converging.
  • the integrally formed on the dome-like vault 18 spacers 19 are produced in one operation with the hollow body 2, for example by injection molding.
  • the lower opening of the hollow body 2 is bounded by a foot ring 22. Within this foot ring 22 are six
  • Recesses 26 arranged, each offset by an angle of 60 degrees.
  • a further embodiment provides hollow body 2 arranged in a rectangular grid, whose four recesses are offset by 90 degrees.
  • This upwardly open recesses 26 summarize in the connection of the hollow body 2 to a honeycomb-shaped structure in FIG. 8 illustrated U-shaped Distanz michsbügel 23 with their downwardly directed legs 27. It engages behind in FIG. 8 and 9 shown locking device 24 positively the closed circumference 17th
  • FIG. 10 shows how a hollow body 2 according to the invention is set with stacking webs 32 on a further hollow body 2 according to the invention, wherein the stack web 32 is seated on the annular shoulder 20 of the frustoconical periphery 17.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Bridges Or Land Bridges (AREA)
  • Panels For Use In Building Construction (AREA)

Claims (12)

  1. Utilisation d'un corps creux libre de flotter, selon l'une des revendications 7 à 12, dans une plaque ou un plafond (1) de corps creux en béton armé, avec des traverses en béton (5) agencées entre des corps creux (2) et avec une couche d'armature (3) au-dessus des corps creux (2), ainsi qu'avec une couche d'armature (4) en dessous des corps creux (2), le béton (30) d'au moins une traverse en béton (5) présentant au moins un renfort en acier (7), notamment une ancre à deux têtes, l'ancre à deux têtes étant agencée de façon inclinée, l'ancre à deux têtes s'étendant approximativement à partir du point d'intersection entre la verticale et la couche d'armature supérieure (3) dans un noeud de traverses en béton, et approximativement jusqu'au point d'intersection entre la verticale et la couche d'armature inférieure (4) dans un noeud de traverses en béton voisin, une ancre à deux têtes étant en outre prévue dans au moins une traverse en béton (5), laquelle est agencée de façon inclinée contre la première ancre à deux têtes, de manière à former conjointement une armature en forme de croix en diagonale.
  2. Utilisation selon la revendication 1, dans laquelle des barres d'armature verticales (6) sont prévues dans les noeuds de traverses en béton.
  3. Utilisation selon la revendication 1 ou 2, dans laquelle les barres d'armature verticales (6) sont également ou exclusivement agencées dans les traverses en béton (5) entre les noeuds de traverses en béton.
  4. Utilisation selon l'une des revendications 1 à 3, dans laquelle les barres d'armature verticales (6) sont conçues comme au moins une ancre à une tête en crochet (12) et/ou comme au moins un arceau en Z (14) et/ou comme au moins un arceau en U (15).
  5. Utilisation selon l'une des revendications 1 à 4, dans laquelle des traverses en acier (7) inclinées sous tension sont conçues comme une ancre à une tête en crochet (13) dans au moins une traverse en béton (5).
  6. Utilisation selon l'une des revendications 1 à 5, dans laquelle des fibres résistantes à la traction sont prévues dans le béton d'au moins une traverse en béton (5).
  7. Corps creux libre de flotter (2) pour la réalisation de plaques ou de plafonds (1) constitués de corps creux en béton armé, selon la revendication 1, conçu comme un récipient fermé sur le pourtour et ouvert vers le bas, le récipient comprenant des espaceurs, le corps creux libre de flotter (2) présentant un pourtour en forme de cône ou de pyramide tronquée (17), et sa partie terminale supérieure formant une voûte du genre coupole (18), la voûte du genre coupole (18) présentant un contour approximativement semi-ellipsoïde (21) dans sa section transversale, caractérisé en ce qu'il est prévu des espaceurs supérieurs, dont les lignes de crête supérieures s'étendent dans un plan parallèle à l'ouverture du récipient et sont formées sur la voûte du genre coupole (18), et en ce que le corps creux (2) présente un gradin annulaire (20) dans la région située entre le pourtour en forme de cône ou de pyramide tronquée (17) et la voûte du genre coupole (18).
  8. Corps creux libre de flotter (2) selon la revendication 7, caractérisé en ce qu'en guise d'espaceur supérieur, il est prévu au moins trois nervures (19) décalées selon des angles identiques et agencées radialement, lesquelles sont formées sur la voûte du genre coupole (18).
  9. Corps creux libre de flotter (2) selon l'une des revendications 7 à 8, caractérisé en ce qu'un anneau de pied (22) forme la partie terminale inférieure du corps creux (2).
  10. Corps creux libre de flotter (2) selon l'une des revendications 7 à 9, caractérisé en ce que des arceaux de mise à distance (23) sont répartis de façon homogène sur le pourtour du corps creux (2) en tant qu'espaceurs latéraux par rapport à d'autres corps creux (2), les arceaux de mise à distance (23) étant conçus en forme de U et présentant une sécurité d'encliquetage (24).
  11. Corps creux libre de flotter (2) selon l'une des revendications 7 à 10, caractérisé en ce que les espaceurs (19) formés dans la voûte du genre coupole (18) se prolongent radialement jusqu'au pourtour en tant que moulure (25), et/ou en ce que les espaceurs supérieurs (19) sont conçus de façon à se rejoindre de façon centrée.
  12. Corps creux libre de flotter (2) selon l'une des revendications 7 à 11, caractérisé en ce que des traverses d'empilage (32) sont agencées sous le gradin annulaire (20).
EP05775015.0A 2004-08-13 2005-08-12 Dalle ou plancher en beton arme a corps creux Active EP1786990B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE200420012814 DE202004012814U1 (de) 2004-08-13 2004-08-13 Auftriebsfreier Hohlkörper
DE200520004622 DE202005004622U1 (de) 2005-03-19 2005-03-19 Verstärkung von Hohlkörperbetondecken
PCT/EP2005/008819 WO2006018253A1 (fr) 2004-08-13 2005-08-12 Dalle ou plancher en beton arme a corps creux

Publications (2)

Publication Number Publication Date
EP1786990A1 EP1786990A1 (fr) 2007-05-23
EP1786990B1 true EP1786990B1 (fr) 2015-12-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05775015.0A Active EP1786990B1 (fr) 2004-08-13 2005-08-12 Dalle ou plancher en beton arme a corps creux

Country Status (8)

Country Link
US (1) US7540121B2 (fr)
EP (1) EP1786990B1 (fr)
AU (1) AU2005274371B2 (fr)
CA (1) CA2576027C (fr)
EA (1) EA009028B1 (fr)
ES (1) ES2565411T3 (fr)
PL (1) PL1786990T3 (fr)
WO (1) WO2006018253A1 (fr)

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IT1310542B1 (it) * 1999-03-03 2002-02-18 Valerio Pontarolo Elemento modulare per vespaio e solaio
DE10004640A1 (de) * 2000-02-03 2001-08-09 Haeussler Planung Gmbh Hohlkörper mit Abstandhaltern
BE1015117A5 (nl) * 2002-09-23 2004-10-05 Belvi Nv Prefabelement en werkwijze voor het vervaardigen ervan.
US20070214740A1 (en) * 2003-12-23 2007-09-20 The Australian Steel Company (Operations) Pty Ltd Cavity Former

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US20070271864A1 (en) 2007-11-29
AU2005274371B2 (en) 2010-11-11
EA009028B1 (ru) 2007-10-26
US7540121B2 (en) 2009-06-02
PL1786990T3 (pl) 2016-09-30
EA200700209A1 (ru) 2007-06-29
ES2565411T3 (es) 2016-04-04
CA2576027A1 (fr) 2006-02-23
CA2576027C (fr) 2011-03-01
WO2006018253A1 (fr) 2006-02-23
AU2005274371A1 (en) 2006-02-23
EP1786990A1 (fr) 2007-05-23

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