EP1223259B1 - Reinforcement for columns supported slab floors as well as a method for manufacturing a reinforcement - Google Patents

Reinforcement for columns supported slab floors as well as a method for manufacturing a reinforcement Download PDF

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Publication number
EP1223259B1
EP1223259B1 EP01810299A EP01810299A EP1223259B1 EP 1223259 B1 EP1223259 B1 EP 1223259B1 EP 01810299 A EP01810299 A EP 01810299A EP 01810299 A EP01810299 A EP 01810299A EP 1223259 B1 EP1223259 B1 EP 1223259B1
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EP
European Patent Office
Prior art keywords
reinforcement
shear
elements
reinforcement elements
shear reinforcement
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 - Lifetime
Application number
EP01810299A
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German (de)
French (fr)
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EP1223259A1 (en
Inventor
Thomas Mösch
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Ancotech AG
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Ancotech AG
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Publication of EP1223259A1 publication Critical patent/EP1223259A1/en
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Publication of EP1223259B1 publication Critical patent/EP1223259B1/en
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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
    • E04C5/01—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
    • E04B5/43—Floor structures of extraordinary design; Features relating to the elastic stability; Floor structures specially designed for resting on columns only, e.g. mushroom floors

Definitions

  • the invention relates to a reinforcement of at least one upper and / or lower horizontal bending reinforcement and shear reinforcement elements for supported on columns flat slabs of steel or prestressed concrete, which in order to increase the carrying capacity of transverse stress zones, in particular punching zones in the area of these zones according to the requirements of the thrust cover is provided in the interior of the flat ceiling extending shear reinforcement elements, and that the shear reinforcement elements are arranged with respect to the longitudinal axis of the supports viewed in a horizontal plane at least approximately radially, and a method for producing such a reinforcement.
  • Object of the present invention is to provide a reinforcement of the type mentioned, which does not have the above-mentioned disadvantages, i. which in the hazardous areas, no risky weld has, in conjunction with which is not in the punching zone located adjacent, adjacent concrete, the lower reinforcement additionally supported, and is extremely simple in training, handling and storage.
  • the subject of the present invention is furthermore a method according to claim 7 for producing a reinforcement according to claim 1.
  • the reinforcement arranged in a ceiling 2 supported on a support 1 has an upper and a lower horizontal bending reinforcement 3 and 4, respectively.
  • the elements of the flat cover 2 with respect to the longitudinal axis 5 of the support 1 are radially arranged shear reinforcement elements 6 provided.
  • the shear reinforcement elements 6 consist, as shown in Figures 1 and 2 It can be seen from upright erect, perforated over its entire surface, preferably made of steel sheets, which extend beyond the punching endangered zone A out and there in non-punching endangered area of the ceiling 2 firmly in the concrete Flat ceiling 2 are anchored, which causes a significantly increased effectiveness of the shear reinforcement elements 6 in the punch-endangered area A.
  • the shear reinforcement elements 6 are supported on the lower and / or upper bending reinforcement 4 and 3 and / or, for example. attached with fastening wires.
  • FIGS. 3 to 6 analog FIGS. 3 to 6
  • arrangements of the shear reinforcement elements 6 are shown in the ground plan.
  • FIG. 3 are the shear reinforcement elements 6 welded together in the center, according to FIG. 4 loosely laid, ie, for example, by means of fastening wires or auxiliary structures attached to the upper and / or lower bending reinforcement 3 and 4, respectively FIG. 5 welded on its front sides with a steel core 7, according to FIG. 6 welded on its front side with a steel tube 8, and according to the FIGS. 7 and 8 by means of a welded on its top, extending over two opposing shear reinforcement elements 6 extending high-strength steel wire 9 additionally reinforced.
  • FIGS. 9 to 17 are shown in plan view respectively in side view different embodiments of inventive shear reinforcement elements 6, wherein the FIGS. 9 and 10 a shear reinforcement element 6 as shown in Figures 1 and 2 see, show, FIG. 11 shows a shear reinforcement element 6 provided with mutually staggered holes 10, FIG. 12 shows a two-part V-shaped welded together shear reinforcement element 6, FIG. 13 one of two about bolt 11 to a pair of sheets assembled shear reinforcement element 6, and FIG. 14 a shear reinforcement element 6 consisting of a V-shaped bent, perforated sheet metal.
  • the shear reinforcement elements 6 according to the FIGS. 16 and 17 are for their preparation in the openings 10 of the sheets according to FIG. 15 Bolt 12 ( Fig. 16) or 13 (Fig. 17 ) and welded to the sheet. In this way, projections for anchoring in the adjacent concrete when used in a reinforcement according to claim 1.
  • the bolt 13 can be like FIG. 17 be seen, for example, be provided with anchoring heads 14 at their two-sided ends.

Abstract

Reinforcement comprises at least one upper and/or lower horizontal bending reinforcement elements (6) and bent-up bar elements for flat roofs of steel or prestressed concrete placed on supports. The bending reinforcement elements are arranged in a radiated manner with respect to the longitudinal axis (5) of the support in a horizontal plane. The elements consist of sheets with recesses. An Independent claim is also included for a process for the production of the reinforcement.

Description

Die Erfindung betrifft eine Bewehrung aus mindestens einer oberen und/oder unteren horizontalen Biegebewehrung und Schubbewehrungselementen für auf Stützen aufgelagerte Flachdecken aus Stahl- oder Spannbeton, welche zur Erhöhung der Tragfähigkeit querkraftbeanspruchter Zonen, insbesondere durchstanzgefährdeter Zonen, im Bereich dieser Zonen den Erfordernissen der Schubdeckung entsprechend mit im Innern der Flachdecke sich erstreckenden Schubbewehrungselementen versehen ist, und dass die Schubbewehrungselemente bezüglich der Längsachse der Stützen in einer Horizontalebene betrachtet mindestens annähernd strahlenförmig angeordnet sind, sowie ein Verfahren zur Herstellung einer solchen Bewehrung.The invention relates to a reinforcement of at least one upper and / or lower horizontal bending reinforcement and shear reinforcement elements for supported on columns flat slabs of steel or prestressed concrete, which in order to increase the carrying capacity of transverse stress zones, in particular punching zones in the area of these zones according to the requirements of the thrust cover is provided in the interior of the flat ceiling extending shear reinforcement elements, and that the shear reinforcement elements are arranged with respect to the longitudinal axis of the supports viewed in a horizontal plane at least approximately radially, and a method for producing such a reinforcement.

Es ist bereits bekannt, in Zonen der vorangehend erwähnten durchstanzgefährdeten Art zusammengeschweisste, pilzförmige Armierungselemente einzusetzen, die jedoch den gravierenden Nachteil aufweisen, dass die über diese aufzunehmenden Kräfte unerwünschterweise über Schweissnähte dieser Armierungselemente geleitet werden, und die Letzteren zusätzlich einen wesentlichen Unterbruch der Betonstruktur an deren Einsatzstelle bewirken.It is already known to use welded together mushroom-shaped reinforcing elements in zones of the above-mentioned punch-endangered type, which, however, have the serious disadvantage that the forces to be absorbed by these are undesirably conducted via welds of these reinforcing elements, and the latter additionally a substantial interruption of the concrete structure at their Cause employment.

Aus der DE 19 741 509 A sowie der US-A-1,625,899 sind nur in der durchstanzgefährdete Zone angeordnete, relativ kompliziert ausgebildete, nicht mit einer unteren Biegebewehrung zusammenwirkende Bewehrung bekannt, welche den Nachteil aufweisen, dass ihre Ausbildung sowie ihre Anordnung beim Bau von Flachdecken, und deren Lagerhaltung in verschiedenen Grössen äusserst kompliziert ist.From the DE 19 741 509 A as well as the US-A-1,625,899 are only in the punching-risk zone arranged, relatively complicated trained, not cooperating with a lower bending reinforcement reinforcement known, which have the disadvantage that their training and their arrangement in the construction of flat ceilings, and their storage in different sizes is extremely complicated.

Aufgabe der vorliegenden Erfindung ist die Schaffung einer Bewehrung der eingangs erwähnten Art, welche die vorangehend angeführten Nachteile nicht aufweist, d.h. welche in den spannungsgefährdeten Bereichen, keine risikobehaftete Schweißnaht aufweist, in Verbund mit dem sich nicht in der durchstanzgefährdeten Zone sich befindenden, angrenzenden Beton steht, die untere Bewehrung zusätzlich abstützt, sowie äusserst einfach in der Ausbildung, Handhabung und Lagerhaltung ist.Object of the present invention is to provide a reinforcement of the type mentioned, which does not have the above-mentioned disadvantages, i. which in the hazardous areas, no risky weld has, in conjunction with which is not in the punching zone located adjacent, adjacent concrete, the lower reinforcement additionally supported, and is extremely simple in training, handling and storage.

Diese Aufgaben werden erfindungsgemäss nach Anspruch 1 gelöst.These objects are achieved according to claim 1 according to the invention.

Zweckmässige Weiterausgestaltungen der erfindungsgemässen Bewehrung sind Gegenstand der Ansprüche 2 bis 6.Advantageous further developments of the inventive reinforcement are the subject of claims 2 to 6.

Gegenstand der vorliegenden Erfindung ist ferner ein Verfahren nach Anspruch 7 zur Herstellung einer Bewehrung nach Anspruch 1.The subject of the present invention is furthermore a method according to claim 7 for producing a reinforcement according to claim 1.

Nachstehend wird die Erfindung anhand der Zeichnung beispielsweise erläutert:The invention is explained below with reference to the drawing, for example:

Es zeigen:

Fig. 1 und Fig. 2
im Aufriss sowie im Grundriss eine erste beispielsweise Ausführungsform einer erfindungsgemässen Bewehrung in einer auf einer Stütze aufgelagerten Flachdecke;
Fig. 3 bis 7
im Grundriss beispielsweise Anordnungen von erfindungsgemässen Schubbewehrungselementen in auf Stützen aufgelagerten Flachdecken;
Fig. 8
einen Schnitt längs der Linie VIII - VIII in Figur 7; und
Fig. 9 bis Fig. 17
im Grundriss sowie in Seitenansicht verschiedene Ausführungsformen von erfindungsgemässen Schubbewehrungselementen.
Show it:
Fig. 1 and Fig. 2
in elevation and in plan a first example embodiment of an inventive reinforcement in a supported on a support flat ceiling;
Fig. 3 to 7
in plan view, for example, arrangements of shear reinforcement elements according to the invention in flat slabs supported on supports;
Fig. 8
a section along the line VIII - VIII in FIG. 7 ; and
Fig. 9 to Fig. 17
in plan view and side view of various embodiments of inventive shear reinforcement elements.

Wie aus den Figuren 1 und 2 ersichtlich, weist die in einer auf einer Stütze 1 aufgelagerten Decke 2 angeordnete Bewehrung eine obere sowie eine untere horizontale Biegebewehrung 3 bzw. 4 auf. Zur Erhöhung der Tragfähigkeit der durchstanzgefährdeten Zone A, welche sich z.B. in der Schweiz nach der SIA-Norm 162 ermitteln lässt, sind im Bereich dieser Zone A den Erfordernissen der Schubdeckung entsprechend im Innern der Flachdecke 2 bezüglich der Längsachse 5 der Stütze 1 strahlenförmig angeordnete Schubbewehrungselemente 6 vorgesehen.Like from the Figures 1 and 2 As can be seen, the reinforcement arranged in a ceiling 2 supported on a support 1 has an upper and a lower horizontal bending reinforcement 3 and 4, respectively. In order to increase the load-bearing capacity of the zone A to be pierced, which can be determined, for example, in Switzerland according to SIA Standard 162, in the region of this zone A, the elements of the flat cover 2 with respect to the longitudinal axis 5 of the support 1 are radially arranged shear reinforcement elements 6 provided.

Die Schubbewehrungselemente 6 bestehen, wie aus den Figuren 1 und 2 ersichtlich, aus hochkant aufgestellten, über ihre gesamte Fläche gelochten, vorzugsweise aus Stahl bestehenden Blechen, welche sich über die durchstanzgefährdete Zone A hinaus erstrecken und dort im nicht durchstanzgefährdeten Bereich der Decke 2 fest im Beton der Flachdecke 2 verankert sind, was eine wesentlich erhöhte Wirksamkeit der Schubbewehrungselemente 6 im durchstanzgefährdeten Bereich A bewirkt.The shear reinforcement elements 6 consist, as shown in Figures 1 and 2 It can be seen from upright erect, perforated over its entire surface, preferably made of steel sheets, which extend beyond the punching endangered zone A out and there in non-punching endangered area of the ceiling 2 firmly in the concrete Flat ceiling 2 are anchored, which causes a significantly increased effectiveness of the shear reinforcement elements 6 in the punch-endangered area A.

Die Schubbewehrungselemente 6 sind dabei an der unteren und/oder oberen Biegebewehrung 4 bzw. 3 abgestützt und/oder z.B. mit Befestigungsdrähten befestigt.The shear reinforcement elements 6 are supported on the lower and / or upper bending reinforcement 4 and 3 and / or, for example. attached with fastening wires.

Aus den zu Figur 2 analogen Figuren 3 bis 6 sind im Grundriss weitere beispielsweise Anordnungen der Schubbewehrungselemente 6 dargestellt.Out of the too FIG. 2 analog FIGS. 3 to 6 For example, arrangements of the shear reinforcement elements 6 are shown in the ground plan.

In Figur 3 sind die Schubbewehrungselemente 6 im Zentrum miteinander verschweisst, gemäss Figur 4 lose verlegt, d.h. zum Beispiel mittels Befestigungsdrähten oder Hilfskonstruktionen an der oberen und/oder unteren Biegebewehrung 3 respektive 4 befestigt, gemäss Figur 5 über ihre Stirnseiten mit einem Stahlkern 7 verschweisst, gemäss Figur 6 über ihre Stirnseite mit einem Stahlrohr 8 verschweisst, und gemäss den Figuren 7 und 8 mittels eines auf ihrer Oberseite angeschweissten, sich über zwei einander gegenüberliegenden Schubbewehrungselementen 6 sich erstreckenden hochfesten Stahldrahtes 9 zusätzlich verstärkt.In FIG. 3 are the shear reinforcement elements 6 welded together in the center, according to FIG. 4 loosely laid, ie, for example, by means of fastening wires or auxiliary structures attached to the upper and / or lower bending reinforcement 3 and 4, respectively FIG. 5 welded on its front sides with a steel core 7, according to FIG. 6 welded on its front side with a steel tube 8, and according to the FIGS. 7 and 8 by means of a welded on its top, extending over two opposing shear reinforcement elements 6 extending high-strength steel wire 9 additionally reinforced.

In den Figuren 9 bis 17 sind im Grundriss respektive in Seitenansicht verschiedene Ausführungsformen von erfindungsgemässen Schubbewehrungselementen 6 dargestellt, wobei die Figuren 9 und 10 ein Schubbewehrungselement 6 wie aus den Figuren 1 und 2 ersichtlich, zeigen, Figur 11 zeigt ein mit zueinander versetzt angeordneten Löchern 10 versehenes Schubbewehrungselement 6, Figur 12 zeigt ein aus zwei Teilen V-förmig zusammengeschweisstes Schubbewehrungselement 6, Figur 13 ein aus zwei über Bolzen 11 zu einem Blechpaar zusammengesetztes Schubbewehrungselement 6, und Figur 14 ein aus einem V-förmig abgekanteten, gelochten Blech bestehendes Schubbewehrungselement 6.In the FIGS. 9 to 17 are shown in plan view respectively in side view different embodiments of inventive shear reinforcement elements 6, wherein the FIGS. 9 and 10 a shear reinforcement element 6 as shown in Figures 1 and 2 see, show, FIG. 11 shows a shear reinforcement element 6 provided with mutually staggered holes 10, FIG. 12 shows a two-part V-shaped welded together shear reinforcement element 6, FIG. 13 one of two about bolt 11 to a pair of sheets assembled shear reinforcement element 6, and FIG. 14 a shear reinforcement element 6 consisting of a V-shaped bent, perforated sheet metal.

Bei den Schubbewehrungselementen 6 gemäss den Figuren 16 und 17 werden zu deren Herstellung in die Öffnungen 10 der Bleche gemäss Figur 15 Bolzen 12 (Fig. 16) oder 13 (Fig. 17) eingepresst und mit dem Blech verschweisst. Auf diese Weise entstehen Vorsprünge zur Verankerung im angrenzenden Beton bei deren Einsatz in einer Bewehrung gemäss Patentanspruch 1. Zur besseren Verankerung im Beton können die Bolzen 13 dabei wie aus Figur 17 ersichtlich, an ihren beidseitigen Enden z.B. mit Verankerungsköpfen 14 versehen sein.In the shear reinforcement elements 6 according to the FIGS. 16 and 17 are for their preparation in the openings 10 of the sheets according to FIG. 15 Bolt 12 ( Fig. 16) or 13 (Fig. 17 ) and welded to the sheet. In this way, projections for anchoring in the adjacent concrete when used in a reinforcement according to claim 1. For better anchoring in concrete, the bolt 13 can be like FIG. 17 be seen, for example, be provided with anchoring heads 14 at their two-sided ends.

Claims (7)

  1. Reinforcement comprising at least an upper and/or lower horizontal flexural reinforcement and shear reinforcement elements for reinforced concrete or prestressed concrete slab floors supported on columns which, in order to increase the load-bearing capacity of zones subjected to shearing forces and at risk of punching, is, in the area of these zones, provided with shear reinforcement elements extending within the interior of the slab floor so as to fulfil the requirements in terms of shear capacity, said shear reinforcement elements (6) being arranged, viewed in a horizontal plane, in an approximately ray-formed configuration in relation to the longitudinal axis (5) of the columns (1), characterised in that the shear reinforcement elements (6) consist of perforated metal plates, and/or metal plates provided with projections, set up on their edge on the upper side of the lower flexural reinforcement (4), which extend beyond the punch-endangered zone (A).
  2. Reinforcement according to claim 1, characterised in that two adjacent metal plates are bent into a V-shape to form a shear reinforcement element (6) composed of a single piece.
  3. Reinforcement according to claim 1, characterised in that two adjacent shear reinforcement elements are welded together in a V-shape.
  4. Reinforcement according to one of the claims 1 to 3, characterised in that the shear reinforcement elements (6), are welded together on their inwards-facing end faces, viewed in a radial direction, directly or via a steel core (7) or a steel tube (8).
  5. Reinforcement according to one of the claims 1 to 4, characterised in that the perforated areas account, in terms of area, for at least 5%, preferably at least 15% of a side surface of a metal plate.
  6. Reinforcement according to one of the claims 1 to 5, characterised in that the metal plates have perforations and/or projections (12, 13) distributed over their entire surface.
  7. Method for the manufacture of a reinforcement according to claim 1, characterised in that, so as to fulfil the requirements in terms of shear capacity, a plurality of shear reinforcement elements (6) extending beyond the punch-endangered zone (A) are laid edge-up on the upper side of the lower flexural reinforcement (4) and are fixed to this if necessary, then the upper flexural reinforcement (3) is installed, and the shear reinforcement elements (6) are fixed to the upper flexural reinforcement (3) if necessary.
EP01810299A 2001-01-12 2001-03-26 Reinforcement for columns supported slab floors as well as a method for manufacturing a reinforcement Expired - Lifetime EP1223259B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH392001 2001-01-12
CH392001 2001-01-12

Publications (2)

Publication Number Publication Date
EP1223259A1 EP1223259A1 (en) 2002-07-17
EP1223259B1 true EP1223259B1 (en) 2008-10-01

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EP01810299A Expired - Lifetime EP1223259B1 (en) 2001-01-12 2001-03-26 Reinforcement for columns supported slab floors as well as a method for manufacturing a reinforcement

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EP (1) EP1223259B1 (en)
AT (1) ATE409788T1 (en)
DE (1) DE50114362D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008012547U1 (en) * 2008-09-23 2010-02-11 Ancotech Ag Arrangement for reinforcing a concrete structure against punching in the area of the support of a ceiling element on a support and punching shear reinforcement element for this purpose

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004005916A1 (en) * 2004-02-06 2005-09-01 Tue, Nguyen Viet, Prof. Dr.-Ing.habil. Mounting part e.g. for concrete for increasing load under pressure, has special fitting for concrete to be applied with tubular pipe arranged between load introduction surfaces
GB2419142B (en) * 2004-10-15 2007-01-10 Structural Systems Shearhead
RU2460856C1 (en) * 2010-12-27 2012-09-10 Государственное образовательное учреждение высшего профессионального образования "Уральский государственный университет путей сообщения" (УрГУПС) Slab reinforcement joint

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR332797A (en) * 1902-06-13 1903-11-06 Fritz Pohlmann Reinforced cement beam system
AT382188B (en) * 1984-07-24 1987-01-26 Avi Alpenlaendische Vered SHOE REINFORCEMENT SYSTEM FOR SURFACE STRUCTURES
DE19712283C1 (en) * 1997-03-24 1998-05-28 Max Boegl Stahl Und Anlagenbau Steel reinforcing cap for flat roof at support
DE19741509B4 (en) * 1997-09-20 2004-03-11 Stahl + Verbundbau Gesellschaft für industrielles Bauen m.b.H. Column head extension as punching shear reinforcement in reinforced concrete slabs
DE19756358A1 (en) * 1997-12-18 1999-07-01 Deha Ankersysteme Shear reinforcement for flat slabs and dowel strips for this

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008012547U1 (en) * 2008-09-23 2010-02-11 Ancotech Ag Arrangement for reinforcing a concrete structure against punching in the area of the support of a ceiling element on a support and punching shear reinforcement element for this purpose
EP2166171A1 (en) 2008-09-23 2010-03-24 Ancotech Ag Device for reinforcing a concrete structure against punching around the support area of a floor slab and punching reinforcing element for same
EP2166172A1 (en) 2008-09-23 2010-03-24 Ancotech Ag Device for reinforcing a concrete structure against punching around the support area of a floor slab and punching reinforcing element for same

Also Published As

Publication number Publication date
EP1223259A1 (en) 2002-07-17
DE50114362D1 (en) 2008-11-13
ATE409788T1 (en) 2008-10-15

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