EP1703035A1 - Élément de construction pour armature de cisaillement et de poinçonnement - Google Patents

Élément de construction pour armature de cisaillement et de poinçonnement Download PDF

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Publication number
EP1703035A1
EP1703035A1 EP05026801A EP05026801A EP1703035A1 EP 1703035 A1 EP1703035 A1 EP 1703035A1 EP 05026801 A EP05026801 A EP 05026801A EP 05026801 A EP05026801 A EP 05026801A EP 1703035 A1 EP1703035 A1 EP 1703035A1
Authority
EP
European Patent Office
Prior art keywords
component according
force distribution
reinforcement
component
shear
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Withdrawn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
EP05026801A
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German (de)
English (en)
Inventor
Harald Braasch
Werner Venter
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.)
Schoeck Bauteile GmbH
Original Assignee
Schoeck Bauteile 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 Schoeck Bauteile GmbH filed Critical Schoeck Bauteile GmbH
Publication of EP1703035A1 publication Critical patent/EP1703035A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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

Definitions

  • the invention relates to a component for shear and / or punching shear reinforcement, in particular for transmitting power in the connection area of supports to reinforced components such as flat slabs and floor slabs, consisting of a plurality of substantially rod-shaped reinforcing elements which extend in the vertical plane and are arranged spaced from each other.
  • EP-A-1 033 454 describes a shear reinforcement element consisting of several mutually parallel reinforcing elements in the form of double-headed bolts and a reinforcing elements interconnecting connecting element, which between the upper and the lower bending reinforcement of the associated component is fixed to the reinforcing elements.
  • This does not serve as the connecting element for the required power transmission between the reinforcing elements, but instead provides the upper and lower bending reinforcement with the interposed vertical reinforcing elements for the desired thrust transfer, which takes place in a known manner to the truss model by the thrust is divided into each other subsequent vertical and diagonal force components (the vertical force components pass through the reinforcing elements and the diagonal force components from the upper bolt head of one reinforcing element to the lower bolt head of the adjacent reinforcing element).
  • the connecting element does not fix the individual reinforcing elements between the upper and lower bending reinforcement, but if this surrounds the upper end of the bolt heads of the reinforcing elements and is thus arranged in or on the upper bending reinforcement. Even then, the essential force transmission does not take place via the usually consisting of a C-shaped sheet metal connecting element, but at most on the adjacent upper bending reinforcement.
  • shear reinforcement elements are suitable for normal dimensioning, however, only for "normal" ceiling thicknesses;
  • efforts have increasingly been made to reduce the height of the components to be assembled with the shear reinforcement elements, in particular the flat slabs supported on supports, in order to save material on the one hand and to gain room height on the other hand.
  • the present invention seeks to provide a device for shear and / or shear reinforcement of the type mentioned available that either - at the same height - an increased load capacity or - with constant load - has a reduced required height.
  • the component has an additional force distribution element and that the force distribution element consists of high-strength concrete.
  • the force distribution element consists of high-strength concrete.
  • the force distribution element As a material for the force distribution element is a concrete in question, which is higher than the commonly used in-situ concrete, so at least the strength class C 60 or C 65 belongs. As a result, such a force distribution element interrupts the thrust force through the in-situ concrete similar to a steel reinforcement element; However, due to the concrete material, it is on the one hand significantly cheaper than the steel reinforcement elements produce and on the other hand, the concrete force distribution element can be arranged even in the corrosion prone edge region of the components to be reinforced, in which metal reinforcement elements may not extend.
  • the concrete force distribution elements it is of course particularly advantageous if they are positioned in that region of the components to be reinforced, which is exposed to the highest loads, namely in the support area of the components.
  • the force distribution element of the reinforcing elements mutually defining connecting element, so that the reinforcing elements, for example, poured into the concrete force distribution element and installed together with this on site.
  • the power distribution element supports all reinforcing elements of the same component to the shear or punching shear in terms of their shear force transmission.
  • the force distribution element can also be provided, for example, with a fairly wide underside due to the arbitrary configurability of the concrete, this underside can serve at the same time for positioning and extensive application of the entire component for shear or punching reinforcement on the lower bending reinforcement.
  • the force distribution element but also at least indirectly on one of the reinforcing elements mutually determining - for example made of steel - fastener and / or be fixed to the reinforcing elements, so as an additional component due to the connection with the connecting element or the reinforcing elements during positioning of the device for thrust or punching reinforcement automatically to get into the correct installation position.
  • it can support the component for shear or punching reinforcement (or replace other conventional parts of the component for shear reinforcement), that the force distribution element acts as a spacer for bearing the component for shear reinforcement on a lower concrete formwork for the reinforced component.
  • the orientation of the reinforcing elements preferably made of steel double-headed studs with end studs, which are made of steel (or similar material), these are expediently arranged in a vertical plane, either being oriented exactly vertically or even in one may extend to the vertical deviating direction;
  • these inclined reinforcing elements in the vertical plane approximately perpendicular to the theoretical Schubrissverlauf that would set without such reinforcing elements, so that there is an activation of these reinforcing elements, which is associated with less slippage or deformation, as in exactly vertical Arrangement.
  • This also means a corresponding increase in the carrying capacity.
  • Another advantage results from the fact that the inclined reinforcement elements - at least with their upper element sections - can be arranged closer to the support in the horizontal direction, which improves the connection of the shear and / or punching reinforcement element and thus its function again.
  • the inclined reinforcement elements extend in the installed in connection region of columns state at an angle of between 30 ° and 60 ° relative to the vertical and in particular at an angle of 45 °, adjacent reinforcing elements may be arranged on the one hand parallel to each other, but on the other hand also different May have inclinations.
  • the force distribution element is arranged at least on the side facing the support for the shear or punching shear, then it is not only in the higher loaded area, but it can also serve to identify the installation orientation or even a marking in the form of a Have marker. As a result, it can be ensured, for example, with inclined reinforcement elements, that the reinforcement elements are installed at the correct inclination and not be installed by interchanging the orientation of the device for shear or punching shear with opposite slope.
  • the force distribution element In order to improve the composite of the force distribution element with its environment and in particular with the surrounding in-situ concrete of the component to be reinforced, it is recommended that the force distribution element is profiled on its outer surfaces. This ensures that the power flow is not simply diverted around the force distribution element, but that it is actually introduced into this by the bond between the power distribution element and in-situ concrete and intercepted by this and redistributed.
  • the dimensioning of the force distribution element it is recommended that it should have a width and a length at least in the order of a few centimeters, relative to a horizontal cross-section, in order to absorb forces accordingly.
  • shape of various variants are conceivable; However, cuboids, cylinders, etc. are the most suitable ones, which should above all have a relatively large horizontal base area compared with their other extent.
  • FIG. 1 shows a component according to the invention for pushing or punching shear reinforcement 1, which is in the form of a component 2 reinforced with it
  • Flat ceiling 2 is arranged, which in turn is supported on a support 3.
  • the support 3 has, in vertical section from FIG. 1, exemplary vertical support reinforcement elements 4, which extend up into the area of the flat ceiling 2. There, they overlap an upper bending reinforcement 5 of the flat ceiling 2 and a lower bending reinforcement 6, which consist of intersecting reinforcing bars or grid-shaped reinforcing mats.
  • the component for shear or punching shear reinforcement 1 is arranged such that it is limited in height precisely to the area between the upper bending reinforcement 5 and the lower bending reinforcement 6 of the flat ceiling 2.
  • the component for shear or punching shear reinforcement 1 consists of a plurality of mutually parallel and extending in a vertical plane double headed bolt 7, 8 with terminal bolt heads 7a, 7b, 8a, 8b, which are positioned in alignment with the upper and lower bending reinforcement.
  • the reinforcing elements 7, 8 are arranged inclined in the vertical plane to the vertical, of course, an orientation is possible in which the reinforcing elements extend exactly in the vertical direction.
  • the reinforcing elements 7, 8 are fixed to each other via a connecting element 9, which extends in a horizontal plane parallel to the upper and lower bending reinforcement.
  • this connecting element 9 not only provides for the definition of the individual reinforcing elements, but also serves spacers 10, 11 for fixing the position by the connecting element via the spacers 10, 11 are placed on the lower concrete formwork before concreting the flat ceiling 2.
  • the spacers consist of concrete base plates 10 a and metal U-shaped brackets 10 b, on which the connecting element 9 is placed, as can be seen from the detail 1 a.
  • the concrete base plate 10a represents the force distribution element according to the invention and is arranged not only in the lower corrosion prone border area below the lower bending reinforcement 6, but also in the critical support near area of the flat ceiling in which shear cracks would occur if the flat ceiling 2 had no shear reinforcement element.
  • Such a thrust crack course is indicated for illustrative purposes on the left side of the support and provided with the reference numeral 15. Along this shear crack the flat ceiling would tear without shear or punching shear reinforcement and pierce the support through the flat ceiling accordingly.
  • the force distribution element 10a which consists of higher-strength or high-performance concrete. If one compares the right side of the support 3 and the placement of the force distribution element 10a in the transition region from support to flat ceiling and faces this position the Schubrissverlauf 15 on the left side of the support, it is easy to see that the force distribution element 10a is located exactly where the shear crack would otherwise occur. However, it should be noted here that the shear crack course, in particular, depending on the load capacity of the flat ceiling, of course, can turn out differently. In any case, it is advisable to arrange the force distribution element 10a in the area of the flat ceiling as close as possible to the support.
  • the spacer 11 may be constructed in a manner similar to the spacer 10, but the lower base plate 11a of the spacer 11 will hardly act as a force distribution element due to the position away from the support.
  • Figure 2 shows a similar design of a device for shear or punching shear reinforcement 21, wherein the same components are provided with the same reference numerals.
  • the structural element for shear or punching shear reinforcement 21 differs from the structural element for shear or shear reinforcement 1 of FIG. 1 only in that the connecting element 9 is supported by spacers 11, 12, 13 on the lower concrete formwork (or during concreting)
  • the spacer 12 is also still located at a distance from the support and should therefore have hardly any force distribution function, whereas the spacer 13 is arranged at the same position as the spacer 10 of FIG. 1 acting as a force distribution element 10a.
  • the lower base plate 13a of the spacer 13 is made much smaller than the force distribution element 10a of Figure 1, since the connecting element 9 has a further force distribution element 14, which is located above the lower bending reinforcement adjacent to the column reinforcement 4.
  • This force distribution element 14 consists of a cuboid concrete block, however, is carried out on its the reinforcing elements 7, 8 facing side surface inclined in adaptation to the inclination of the reinforcing elements 7, 8.
  • the spacers 12, 13 are connected to not only the Force distribution element 14, but to position the entire component for shear or punching reinforcement 21 height.
  • FIG. 3 shows a component for shear or punching reinforcement 31, which requires no spacers, in that the connecting element 19 consists of higher-strength concrete and itself forms the force distribution element, wherein the connection or force distribution element 19 is provided with a flat, large-area underside 19a , so that it forms a flat and stable bearing surface of the component for shear or punching reinforcement 31 on the lower bending reinforcement 6.
  • the component for shear reinforcement 31 can do without spacers and yet be arranged in height in the flat ceiling 2. This can also be seen from the vertical section of FIG.
  • the reinforcing elements 7, 8 are inclined to the vertical in the vertical plane, it is important for a stable positional fixing that the force distribution element 19 and the connecting element 19 accordingly over a large part of the total length of the device Pushing or punching reinforcement 31 runs.
  • the force distribution element according to the invention clearly indicates the required installation position by either a mark is provided on it or it acts as a marker itself to ensure installation in that the reinforcing elements are arranged so inclined to the flat ceiling 2 or support 3 that the upper ends of the reinforcing elements 7, 8, ie the upper bolt heads 7a, 8a are positioned closer to the support than the lower bolt heads 7b, 8b.
  • the present invention offers the advantage of being able to provide, with the aid of the force distribution element, a very cost-effective component which can be positioned virtually anywhere and even positioned in the region susceptible to corrosion, which increases the carrying capacity of the conventional shear or punching reinforcement elements and thus makes it possible for the flat ceilings can be made correspondingly thinner, in an example, about instead of 35 cm thick only 30 cm must be strong. This saves not only 5cm concrete height over the entire surface of the flat ceiling, but also gains on the other side also 5cm usable room height.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Working Measures On Existing Buildindgs (AREA)
EP05026801A 2005-02-16 2005-12-08 Élément de construction pour armature de cisaillement et de poinçonnement Withdrawn EP1703035A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510007193 DE102005007193A1 (de) 2005-02-16 2005-02-16 Bauelement zur Schub- bzw. Durchstanzbewehrung

Publications (1)

Publication Number Publication Date
EP1703035A1 true EP1703035A1 (fr) 2006-09-20

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ID=36228803

Family Applications (1)

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EP05026801A Withdrawn EP1703035A1 (fr) 2005-02-16 2005-12-08 Élément de construction pour armature de cisaillement et de poinçonnement

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EP (1) EP1703035A1 (fr)
DE (1) DE102005007193A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1411090A (en) * 1971-12-30 1975-10-22 Gleisberg K D Spacer
DE3015407A1 (de) * 1980-04-22 1981-10-29 Andrä, Wolfhart, Dr.-Ing., 7000 Stuttgart Bewehrungselement zur uebertragung von querkraeften in plattenartigen traggliedern, z.b. flachdecken
DE29903114U1 (de) * 1999-02-20 1999-05-20 Syspro-Gruppe Betonbauteile e.V., 68766 Hockenheim Durchstanzbewehrung
EP1033454A2 (fr) * 1999-03-02 2000-09-06 SCHÖCK BAUTEILE GmbH Elément de construction pour armature de cisaillement
DE20120678U1 (de) * 2001-12-20 2002-03-14 Walter Bau Ag Ausbildung eines Knotenpunktes zwischen einer Stahlbetonstütze und einer Flachdecke aus Stahlbeton in einem Geschossbau
WO2005098160A1 (fr) * 2004-04-06 2005-10-20 Technische Universität Wien Element prefabrique en beton a haute resistance destine a une jonction de plancher pour piliers
EP1630315A1 (fr) * 2004-08-21 2006-03-01 Schöck Bauteile GmbH Élément de construction pour armature de cisaillement et de poinconnement

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1411090A (en) * 1971-12-30 1975-10-22 Gleisberg K D Spacer
DE3015407A1 (de) * 1980-04-22 1981-10-29 Andrä, Wolfhart, Dr.-Ing., 7000 Stuttgart Bewehrungselement zur uebertragung von querkraeften in plattenartigen traggliedern, z.b. flachdecken
DE29903114U1 (de) * 1999-02-20 1999-05-20 Syspro-Gruppe Betonbauteile e.V., 68766 Hockenheim Durchstanzbewehrung
EP1033454A2 (fr) * 1999-03-02 2000-09-06 SCHÖCK BAUTEILE GmbH Elément de construction pour armature de cisaillement
DE20120678U1 (de) * 2001-12-20 2002-03-14 Walter Bau Ag Ausbildung eines Knotenpunktes zwischen einer Stahlbetonstütze und einer Flachdecke aus Stahlbeton in einem Geschossbau
WO2005098160A1 (fr) * 2004-04-06 2005-10-20 Technische Universität Wien Element prefabrique en beton a haute resistance destine a une jonction de plancher pour piliers
EP1630315A1 (fr) * 2004-08-21 2006-03-01 Schöck Bauteile GmbH Élément de construction pour armature de cisaillement et de poinconnement

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