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EP1248889A2 - Reinforced or pre-stressed concrete part which is subjected to a transverse force - Google Patents

Reinforced or pre-stressed concrete part which is subjected to a transverse force

Info

Publication number
EP1248889A2
EP1248889A2 EP01923551A EP01923551A EP1248889A2 EP 1248889 A2 EP1248889 A2 EP 1248889A2 EP 01923551 A EP01923551 A EP 01923551A EP 01923551 A EP01923551 A EP 01923551A EP 1248889 A2 EP1248889 A2 EP 1248889A2
Authority
EP
European Patent Office
Prior art keywords
reinforcement
concrete
flat
reinforced concrete
prestressed concrete
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.)
Granted
Application number
EP01923551A
Other languages
German (de)
French (fr)
Other versions
EP1248889B1 (en
Inventor
Oliver Matthaei
Hans-Peter ANDRÄ
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.)
Matthaei Oliver Dipl-Ing
Original Assignee
LEONHARDT ANDRAE und PARTNER BERATENDE INGENIEURE VBI GmbH
LEONHARDT ANDRAE und PARTNER B
Matthaei Oliver
Leonhardt Andra und Partner Beratende Ingenieure VBI 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 LEONHARDT ANDRAE und PARTNER BERATENDE INGENIEURE VBI GmbH, LEONHARDT ANDRAE und PARTNER B, Matthaei Oliver, Leonhardt Andra und Partner Beratende Ingenieure VBI GmbH filed Critical LEONHARDT ANDRAE und PARTNER BERATENDE INGENIEURE VBI GmbH
Publication of EP1248889A2 publication Critical patent/EP1248889A2/en
Application granted granted Critical
Publication of EP1248889B1 publication Critical patent/EP1248889B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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 reinforced concrete part which can be stressed by a transverse force.
  • a reinforced concrete part is also understood to mean a prestressed concrete part.
  • shear reinforcement is required for shear protection, among other things in the area of the supports.
  • shear reinforcement made of reinforcing steel in the form of S-hooks or stirrups, dowel bars, double-headed dowels, ironing mats, lattice girders, Tobler Walm, Geilinger collar, ironing mats, crack star.
  • a shear reinforcement made of reinforcing steel in the form of S-hooks or stirrups must, due to poor anchoring, enclose a usually existing longitudinal reinforcement to prevent the shear reinforcement from being torn out. This is very complex and costly. In the case of high degrees of bending tensile reinforcement and a high proportion of shear reinforcement, conventional stirrups are no longer applicable.
  • Dowel strips are usually placed on the lower formwork, so that the lower reinforcement layer is covered by the cross-section of the strip. The exact position and fixation of the bar is decisive for the load-bearing behavior.
  • the dowel strips are welded one-offs and are therefore expensive.
  • Double-headed dowels are usually threaded from above between the upper and lower layers of the existing longitudinal bending reinforcement. With high degrees of reinforcement of the bending tensile reinforcement and different mesh sizes of the upper and lower layer, this is very difficult, sometimes not installable. The double-headed dowels are custom-made and therefore cost-intensive.
  • Dowel strips and double-headed dowels are very common, but one is Series production is not economical because of the high storage costs. Another problem is the interchangeability and storage of different dowel strips and double-headed dowels on the construction site.
  • Tobler Walm and Geilinger Kragen are steel built-in parts that consist of welded steel profiles and are manufactured individually.
  • the support structures are steel-like to install and therefore complex and cost-intensive. Due to the large dead weight, the installation parts must be moved using lifting gear, e.g. with a crane.
  • this object is achieved by the subject matter of patent claim 1.
  • the flat reinforcement part enables transverse forces or moments to be better absorbed and distributed. If the first cracks appear in the concrete when the tensile strength is reached, the load can be distributed in a fan-like manner over the reinforcement part. A participation of the concrete for the tension struts is not necessary.
  • the loads are transferred via the reinforcement part directly according to the principle of minimum deformation work. This means that cracks caused by lateral forces remain small and the load capacity of the reinforced concrete part is maximized.
  • the reinforcement part thus takes over the function of the concrete after the tensile strength of the concrete has been reached.
  • the invention is developed with great advantage in accordance with the features of claims 2 and 3, since the load capacity of a reinforced concrete part can be increased in a very simple manner.
  • the object is achieved by the subject matter of patent claim 8.
  • Such a shaping makes it easy to install the reinforcement part between the upper and lower layers of the flexural reinforcement. No additional position safeguards are required.
  • the reinforcement part is placed on the lower reinforcement layer after installation and can therefore also serve as a spacer for the upper reinforcement layer.
  • the reinforcement part here comprises the continuous bending reinforcement of the support.
  • a fall protection of the flat slab is thus constructively fulfilled by the punching shear reinforcement.
  • a bending reinforcement in the pressure zone running over the support can therefore be omitted if necessary.
  • FIG. 1 is a vertical section through an embodiment of an arrangement according to the invention, seen along the line l-l of FIG. 2,
  • FIG. 2 is a plan view seen in the direction of arrow II of FIG. 1,
  • FIG. 3 is an enlarged view of a detail of FIG. 2,
  • FIG. 4 shows a representation of the load paths, in a sectional representation analogous to FIG. 1,
  • FIG. 5 shows a representation of the tension and compression struts, likewise in a sectional view analogous to FIG. 1,
  • FIGS. 1 to 3 are isometric illustrations of a reinforcement part used in FIGS. 1 to 3,
  • 7 is a side view of a reinforcement part
  • 8 is a sectional view taken along the line Vlll-Vlll of FIG. 7,
  • Fig. 9 is a section seen along the line IX-IX of Fig. 7, and
  • FIG. 10 is a sectional view taken along the line X-X of FIG. 7th
  • Fig. 1 shows in part a part of a building with a vertical element (column or wall) 10 made of reinforced concrete.
  • this vertical element 10 there are reinforcement elements 12, 14 in the form of reinforcement bars.
  • the support area of the support 10 is secured by steel brackets 16.
  • a reinforced concrete ceiling 20 is connected to the vertical element 10. (Alternatively, this can also be a bar system 20).
  • the ceiling 20 has an upper reinforcement 22 and a lower reinforcement 24, over which there is a concrete cover 26 and 28, respectively.
  • the blanket 20 is only shown as a cutout.
  • a reinforcement element 30, 32 has the shape of a V in plan, cf. Fig. 2, where two other reinforcements 34, 36 are shown.
  • a reinforcement element e.g. in the floor plan the shape of a U, or the shape of a hairpin, possible.
  • the reinforcements 30, 32 each protrude with their tips into the edge region of the vertical element 10 and encompass an associated reinforcement element 12, 14, cf. 1 and Fig. 3.
  • the flat reinforcement element 30, 32 is anchored horizontally on the vertical element 10, engages in it, and can introduce its vertical force component into the support area, which is secured by the bracket 16.
  • the reinforcement elements 30, 32, 34, 36 preferably consist of bent steel sheet, usually with a thickness in the range from 2 to 6 mm. That thickness depends on the static requirements. Possibly. the flat reinforcement elements can also be made from carbon fibers or a suitable plastic, or from composite material.
  • the reinforcement elements 30, 32, 34, 36 are flat.
  • the reinforcement element 32 stands on the lower reinforcement 24, which is arranged within the concrete ceiling 20.
  • the upper reinforcement 22 rests on the reinforcement element 32 and is in turn arranged in the upper concrete cover 26.
  • the reinforcement element has 32 recesses (holes) 40, the diameter of which is adapted to the grain size of the concrete used and is usually larger than 32 mm. It also has recesses 42 on its lower edge region, the diameter of which is usually greater than 32 mm.
  • the recesses 40, 42 which can also be referred to as openings, are preferably circular and are arranged vertically one above the other in this exemplary embodiment.
  • the concrete 29 After the introduction of the concrete 29, the concrete 29 extends through each of these recesses 40, 42 and forms "concrete dowels" there, that is to say anchorages which serve to push forces from the concrete 29 into the respective flat reinforcement element 30, 32, 34, or 36 initiate.
  • the reinforcement elements 30, 32, 34, 36 are preferably provided with beads 44 (FIG. 8) in their central region in order to achieve better anchoring in the concrete 29.
  • the reinforcement elements are also preferably provided with recesses 46 at the upper edge and with recesses 48 at the lower edge. This makes these edges look serrated. These lateral recesses 46, 48 improve the absorption of horizontal forces by the reinforcement element in question.
  • FIG. 1 also shows how a lateral force Q acts on the ceiling 20 on the left and right.
  • a counterforce F counteracts these forces Q from below.
  • a right-hand turning moment M acts on the right and a left-turning moment M 'of the same magnitude acts on the left.
  • Fig. 4 shows in radial section the load paths in a conventional manner Presentation.
  • the reference numerals are the same as in FIGS. 1 to 3.
  • a crack zone is indicated, in which one or more cracks occur in the concrete 29 under high loads and where the ceiling 20 would normally break under too high loads.
  • the fracture surface then has the shape of a funnel or cone, and this is why one speaks of a "punching cone". It can be seen that there are many load paths 52 which run transversely and partly approximately perpendicular to this crack zone 50 and therefore counteract a break at this point.
  • the struts emanating from the support 10 are pressure struts. They anchor themselves in the inner area of the "punching cone" on the upper concrete dowels, that is, the concrete dowels in the recesses 40. This is the introduction of the load into the flat reinforcement part 32. From this anchoring, the struts run, as shown, only in the flat reinforcement part 32, and a push field is formed. This causes a flat load transfer in the reinforcement part 32 up to the non-thrust-critical area, which lies outside the crack zone 50.
  • Fig. 5 shows, also in a conventional representation, the tension or compression struts in section.
  • the tension struts run transversely and approximately perpendicular to the crack zone 50, that is to say transversely and partially perpendicular to the “punching cone”, and that they therefore counteract a break at this point.
  • anchoring options in the area of the "concrete dowels" mentioned (at the recesses 40, 42). If the first cracks occur in the concrete 29 when the tensile strength is reached, the load is distributed in the manner of a fan over the entire flat reinforcement part 32 to form the “concrete anchors”, as is clearly shown in FIGS. 4 and 5.
  • the loads are transferred via the flat reinforcement element 30, 32 directly according to the principle of the minimum of the deformation work.
  • the cracks 50 caused by the shear force thus remain small, and a maximum load-bearing capacity of the ceiling 20 is obtained.
  • the flat reinforcement element 32 takes over the function of the concrete. Assuming a rigid body mechanism in the load state, that is to say a separation of the remaining ceiling 20 from the punching cone 50, the transverse force transmission takes place exclusively via the flat reinforcement element 32. The bending and shear reinforcement is decoupled.
  • the failure of an arrangement shown should be done with sufficient advance notice.
  • the ductility of the flat reinforcement element 30, 32 is important for this. In such an arrangement, the transverse forces are namely transmitted via the flat reinforcement element 30, 32.
  • the flat reinforcement element 30, 32 which is preferably made of steel, fails, and the failure is a ductile steel failure and not a brittle concrete failure in the form of a shear-pressure fracture, i.e. the failure announces itself and does not occur suddenly. This is also important in earthquakes.
  • the "concrete dowels" in the recesses 40, 42 have a sufficiently elastic behavior, and if one of these concrete dowels fails, the neighboring concrete dowels will take over the load, i.e. there is only a rearrangement of the load.
  • the recesses 40, 42 and the beads 44 support the concrete dowels when anchoring the oblique struts.
  • reinforcement bars can be passed through the recesses 40, 42, and these can also be attached to these recesses with crimped wires. This gives you a further improvement.
  • FIG. 6 shows an isometric illustration of the reinforcement part 32 of FIGS. 1 to 3. The same reference numerals are used.
  • FIGS. 1 to 3 show details of the embodiment according to FIGS. 1 to 3 in different sectional planes.

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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)
  • Rod-Shaped Construction Members (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

The invention relates to a reinforced or pre-stressed concrete part which is subjected to a transverse force (Q). The upper and lower face of said part are provided with a reinforcement layer (22, 24). At least one planar reinforcement part (30, 32, 34, 36) is provided between said reinforcement layers to protect against shearing. The reinforcement part extends essentially at right angles to a surface of the reinforced concrete part, substantially spanning the entire distance between the reinforcement layers (22, 24) and transversally to at least one cracking zone (50) which appears in the reinforced or pre-stressed concrete part when the latter is under stress.

Description

Querkraftbeanspruchtes Stahl- oder Spannbetonteil Shear-stressed steel or prestressed concrete part
Die Erfindung betrifft ein Stahlbetonteil, welches durch eine Querkraft beanspruchbar ist. Unter Stahlbetonteil wird im folgenden auch ein Spannbetonteil verstanden.The invention relates to a reinforced concrete part which can be stressed by a transverse force. In the following, a reinforced concrete part is also understood to mean a prestressed concrete part.
Bei derartigen Stahlbeton- oder Spannbetonteilen, z.B. einer gestützten Stahlbetondecke, ist unter anderem im Bereich der Stützen eine Schubbewehrung zur Schubsicherung notwendig.With such reinforced concrete or prestressed concrete parts, e.g. a supported reinforced concrete slab, shear reinforcement is required for shear protection, among other things in the area of the supports.
Als Schubbewehrung sind u.a. bekannt: Schubbewehrung aus Betonstahl in Form von S-Haken oder Bügeln, Dübelleisten, Doppelkopfdübel, Bügelmatten, Gitterträger, Tobler Walm, Geilinger Kragen, Bügelmatten, Riss Stern.As shear reinforcement, known: shear reinforcement made of reinforcing steel in the form of S-hooks or stirrups, dowel bars, double-headed dowels, ironing mats, lattice girders, Tobler Walm, Geilinger collar, ironing mats, crack star.
Eine Schubbewehrung aus Betonstahl in Form von S-Haken oder Bügeln muss aus Gründen der schlechten Verankerung eine meist vorhandene Biege- Längsbewehrung umschließen, um ein Ausreißen der Schubbewehrung zu verhindern. Dies ist sehr aufwendig und kostenintensiv. Bei hohen Bewehrungsgraden der Biegezugbewehrung und hohem Schubbewehrungsanteil gelten herkömmliche Bügel als nicht mehr einbaubar.A shear reinforcement made of reinforcing steel in the form of S-hooks or stirrups must, due to poor anchoring, enclose a usually existing longitudinal reinforcement to prevent the shear reinforcement from being torn out. This is very complex and costly. In the case of high degrees of bending tensile reinforcement and a high proportion of shear reinforcement, conventional stirrups are no longer applicable.
Dübelleisten werden meistens auf die untere Schalung gestellt, so dass die untere Bewehrungslage vom Leistenquerschnitt umfasst wird. Hierbei ist die genaue Lage und Fixierung der Leiste für das Tragverhalten ausschlaggebend. Die Dübelleisten sind geschweißte Einzelanfertigungen und somit teuer.Dowel strips are usually placed on the lower formwork, so that the lower reinforcement layer is covered by the cross-section of the strip. The exact position and fixation of the bar is decisive for the load-bearing behavior. The dowel strips are welded one-offs and are therefore expensive.
Doppelkopfdübel werden gewöhnlich von oben zwischen die obere und untere Lage der vorhandenen Biege-Längsbewehrung eingefädelt. Bei hohen Bewehrungsgraden der Biegezugbewehrung und unterschiedlichen Maschenweiten der oberen und unteren Lage ist dies sehr schwierig, mitunter nicht einbaubar. Die Doppelkopfdübel sind Einzelanfertigungen und somit kostenintensiv.Double-headed dowels are usually threaded from above between the upper and lower layers of the existing longitudinal bending reinforcement. With high degrees of reinforcement of the bending tensile reinforcement and different mesh sizes of the upper and lower layer, this is very difficult, sometimes not installable. The double-headed dowels are custom-made and therefore cost-intensive.
Dübelleisten und Doppelkopfdübel sind sehr gebräuchlich, jedoch ist eine Serienfertigung wegen der hohen Lagerhaltungskosten nicht wirtschaftlich. Ein Problem ist auch die Verwechselbarkeit und Lagerung verschiedener Dübelleisten und Doppelkopfdübel auf der Baustelle.Dowel strips and double-headed dowels are very common, but one is Series production is not economical because of the high storage costs. Another problem is the interchangeability and storage of different dowel strips and double-headed dowels on the construction site.
Tobler Walm und Geilinger Kragen sind Stahleinbauteile, die aus zusammengeschweißten Stahlprofilen bestehen und einzeln angefertigt werden. Die Auflagerkonstruktionen sind stahlbaumäßig einzubauen und somit aufwändig und lohnintensiv. Das Versetzen der Einbauteile muss wegen des großen Eigengewichts mit Hebezeug, z.B. mit einem Kran, erfolgen.Tobler Walm and Geilinger Kragen are steel built-in parts that consist of welded steel profiles and are manufactured individually. The support structures are steel-like to install and therefore complex and cost-intensive. Due to the large dead weight, the installation parts must be moved using lifting gear, e.g. with a crane.
Sämtliche gebräuchlichen Lösungen sind in ihrer Wirkungsweise abhängig vom Werkstoff Beton. Verfolgt man die Lastabtragung (Verlauf der Querkräfte), so wird mehrmals die Last in die Bewehrungselemente ein- und ausgeleitet, bis sie in den schubunkritischen Bereich gelangt. Hierbei kann ein Versagen infolge Schub- oder Druckbruchs, oder ein Ausreißen der Bewehrungselemente, auftreten.The effectiveness of all common solutions depends on the material concrete. If you follow the load transfer (course of the transverse forces), the load is passed into and out of the reinforcement elements several times until it reaches the non-shear critical area. Failure due to shear or pressure rupture or tearing of the reinforcement elements can occur.
Es ist daher eine Aufgabe der Erfindung, ein neues, mit einer Querkraft beanspruchbares Stahlbeton- oder Spannbetonteil bereitzustellen.It is therefore an object of the invention to provide a new reinforced concrete or prestressed concrete part that can be subjected to a transverse force.
Nach einem ersten Aspekt der Erfindung wird diese Aufgabe gelöst durch den Gegenstand des Patentanspruchs 1. Durch das flächige Bewehrungsteil können Querkräfte oder Momente besser aufgenommen und verteilt werden. Treten bei Erreichen der Zugfestigkeit des Betons die ersten Risse in diesem auf, so kann die Last fächerartig über das Bewehrungsteil verteilt werden. Eine Mitwirkung des Betons für die Zugstreben ist nicht erforderlich. Die Lasten werden über das Bewehrungsteil direkt nach dem Prinzip des Minimums der Formänderungsarbeit abgetragen. Somit bleiben querkraftbedingte Risse klein, und die Traglast des Stahlbetonteils wird maximiert. Das Bewehrungsteil übernimmt somit nach Erreichen der Zugfestigkeit des Betons die Funktion des Betons.According to a first aspect of the invention, this object is achieved by the subject matter of patent claim 1. The flat reinforcement part enables transverse forces or moments to be better absorbed and distributed. If the first cracks appear in the concrete when the tensile strength is reached, the load can be distributed in a fan-like manner over the reinforcement part. A participation of the concrete for the tension struts is not necessary. The loads are transferred via the reinforcement part directly according to the principle of minimum deformation work. This means that cracks caused by lateral forces remain small and the load capacity of the reinforced concrete part is maximized. The reinforcement part thus takes over the function of the concrete after the tensile strength of the concrete has been reached.
Dabei wird die Erfindung mit großem Vorteil gemäß den Merkmalen der Ansprüche 2 und 3 weitergebildet, da man so die Traglast eines Stahlbetonteils in sehr einfacher Weise erhöhen kann. Nach einem weiteren Aspekt der Erfindung wird die gestellte Aufgabe gelöst durch den Gegenstand des Patentanspruchs 8. Durch eine derartige Formung ist ein leichter Einbau des Bewehrungsteils zwischen der oberen und unteren Lage der Biegezugbewehrung möglich. Es werden keine zusätzlichen Lagesicherungen benötigt. Hierbei wird das Bewehrungsteil nach Einbau der unteren Bewehrungslage auf diese abgestellt und kann somit der oberen Bewehrungslage zusätzlich als Abstandshalter dienen.The invention is developed with great advantage in accordance with the features of claims 2 and 3, since the load capacity of a reinforced concrete part can be increased in a very simple manner. According to a further aspect of the invention, the object is achieved by the subject matter of patent claim 8. Such a shaping makes it easy to install the reinforcement part between the upper and lower layers of the flexural reinforcement. No additional position safeguards are required. The reinforcement part is placed on the lower reinforcement layer after installation and can therefore also serve as a spacer for the upper reinforcement layer.
Eine bevorzugte Weiterbildung der Erfindung ist Gegenstand des Anspruchs 9. Das Bewehrungsteil umfasst hierbei die durchlaufende Biegebewehrung der Stütze. Somit wird eine Absturzsicherung der Flachdecke konstruktiv durch die Durchstanz-Bewehrung erfüllt. Eine über die Stütze verlaufende Biegebewehrung in der Druckzone kann somit ggf. entfallen.A preferred development of the invention is the subject of claim 9. The reinforcement part here comprises the continuous bending reinforcement of the support. A fall protection of the flat slab is thus constructively fulfilled by the punching shear reinforcement. A bending reinforcement in the pressure zone running over the support can therefore be omitted if necessary.
Weitere Einzelheiten und vorteilhafte Weiterbildungen der Erfindung ergeben sich aus dem im folgenden beschriebenen und in der Zeichnung dargestellten Ausführungsbeispiel, sowie aus den Unteransprüchen. Es zeigt:Further details and advantageous developments of the invention result from the exemplary embodiment described below and shown in the drawing, and from the subclaims. It shows:
Fig. 1 einen Vertikalschnitt durch eine Ausführungsform einer erfindungsgemäße Anordnung, gesehen längs der Linie l-l der Fig. 2,1 is a vertical section through an embodiment of an arrangement according to the invention, seen along the line l-l of FIG. 2,
Fig. 2 einen Grundriss, gesehen in Richtung des Pfeiles II der Fig. 1 ,2 is a plan view seen in the direction of arrow II of FIG. 1,
Fig. 3 eine vergrößerte Darstellung einer Einzelheit der Fig. 2,3 is an enlarged view of a detail of FIG. 2,
Fig. 4 eine Darstellung der Lastpfade, in einer Schnittdarstellung analog Fig. 1 ,4 shows a representation of the load paths, in a sectional representation analogous to FIG. 1,
Fig. 5 eine Darstellung der Zug- und Druckstreben, ebenfalls in einer Schnittdarstellung analog Fig. 1 ,5 shows a representation of the tension and compression struts, likewise in a sectional view analogous to FIG. 1,
Fig. 6 eine isometrische Darstellung eines bei den Figuren 1 bis 3 verwendeten Bewehrungsteils,6 is an isometric illustration of a reinforcement part used in FIGS. 1 to 3,
Fig. 7 eine Seitenansicht eines Bewehrungsteils, Fig. 8 einen Schnitt, gesehen längs der Linie Vlll-Vlll der Fig. 7,7 is a side view of a reinforcement part, 8 is a sectional view taken along the line Vlll-Vlll of FIG. 7,
Fig. 9 einen Schnitt, gesehen längs der Linie IX-IX der Fig. 7, undFig. 9 is a section seen along the line IX-IX of Fig. 7, and
Fig. 10 einen Schnitt, gesehen längs der Linie X-X der Fig. 7.10 is a sectional view taken along the line X-X of FIG. 7th
Fig. 1 zeigt im Ausschnitt einen Teil eines Bauwerks mit einem vertikalen Element (Stütze oder Wand) 10 aus Stahlbeton. In diesem vertikalen Element 10 befinden sich Bewehrungselemente 12, 14 in Form von Bewehrungsstäben. Der Auflagerbereich der Stütze 10 ist durch Stahlbügel 16 gesichert.Fig. 1 shows in part a part of a building with a vertical element (column or wall) 10 made of reinforced concrete. In this vertical element 10 there are reinforcement elements 12, 14 in the form of reinforcement bars. The support area of the support 10 is secured by steel brackets 16.
Mit dem vertikalen Element 10 ist eine Stahlbetondecke 20 verbunden. (Alternativ kann dies auch ein Balkensystem 20 sein). Die Decke 20 hat eine obere Bewehrung 22 und eine untere Bewehrung 24, über denen sich jeweils eine Betonüberdeckung 26 bzw. 28 befindet. Die Decke 20 ist nur im Auschnitt dargestellt.A reinforced concrete ceiling 20 is connected to the vertical element 10. (Alternatively, this can also be a bar system 20). The ceiling 20 has an upper reinforcement 22 and a lower reinforcement 24, over which there is a concrete cover 26 and 28, respectively. The blanket 20 is only shown as a cutout.
Zwischen den Bewehrungen 22, 24, und bevorzugt als Abstandshalter für diese, befinden sich flächige Bewehrungselemente, die in Fig. 1 für den linken Teil der Decke 20 mit 30 und für den rechten Teil mit 32 bezeichnet sind. Beim bevorzugten Ausführungsbeispiel hat ein solches Bewehrungselement 30, 32 im Grundriss die Form eines V, vgl. Fig. 2, wo noch zwei andere Bewehrungen 34, 36 dargestellt sind. Alternativ wäre z.B. im Grundriss die Form eines U, oder die Form einer Haarnadel, möglich.Between the reinforcements 22, 24, and preferably as a spacer for them, are flat reinforcement elements, which are designated in FIG. 1 for the left part of the ceiling 20 with 30 and for the right part with 32. In the preferred embodiment, such a reinforcement element 30, 32 has the shape of a V in plan, cf. Fig. 2, where two other reinforcements 34, 36 are shown. Alternatively, e.g. in the floor plan the shape of a U, or the shape of a hairpin, possible.
Die Bewehrungen 30, 32 ragen jeweils mit ihren Spitzen bis in den Randbereich des vertikalen Elements 10 und umgreifen dort ein zugeordnetes Bewehrungselement 12, 14, vgl. Fig. 1 und Fig. 3. Dadurch ist das flächige Bewehrungselement 30, 32 am vertikalen Element 10 horizontal verankert, greift in dieses ein, und kann seine Vertikalkraft-Komponente in den Auflagerbereich einleiten, der durch die Bügel 16 gesichert ist.The reinforcements 30, 32 each protrude with their tips into the edge region of the vertical element 10 and encompass an associated reinforcement element 12, 14, cf. 1 and Fig. 3. As a result, the flat reinforcement element 30, 32 is anchored horizontally on the vertical element 10, engages in it, and can introduce its vertical force component into the support area, which is secured by the bracket 16.
Bevorzugt bestehen die Bewehrungselemente 30, 32, 34, 36 aus gebogenem Stahlblech, gewöhnlich mit einer Dicke im Bereich von 2 bis 6 mm. Diese Dicke richtet sich nach den statischen Erfordernissen. Ggf. können die flächigen Bewehrungselemente auch aus Kohlefasern oder einem geeigneten Kunststoff hergestellt werden, oder aus Kompositmaterial.The reinforcement elements 30, 32, 34, 36 preferably consist of bent steel sheet, usually with a thickness in the range from 2 to 6 mm. That thickness depends on the static requirements. Possibly. the flat reinforcement elements can also be made from carbon fibers or a suitable plastic, or from composite material.
Die Bewehrungselemente 30, 32, 34, 36 sind flächig ausgebildet. Zum Beispiel steht das Bewehrungselement 32 auf der unteren Bewehrung 24 auf, die innerhalb der Betondecke 20 angeordnet ist. Die obere Bewehrung 22 liegt auf dem Bewehrungselement 32 auf und ist ihrerseits in der oberen Betonabdeckung 26 angeordnet. An seinem oberen Randbereich hat das Bewehrungselement 32 Ausnehmungen (Löcher) 40, deren Durchmesser an die Körnung des verwendeten Betons angepasst und gewöhnlich größer als 32 mm ist. Ebenso hat es an seinem unteren Randbereich Ausnehmungen 42, deren Durchmesser gewöhnlich größer als 32 mm ist. Die Ausnehmungen 40, 42, die man auch als Durchbrechungen bezeichnen kann, sind bevorzugt kreisrund ausgeführt und sind bei diesem Ausführungsbeispiel senkrecht übereinander angeordnet. Nach dem Einbringen des Betons 29 erstreckt sich durch jede dieser Ausnehmungen 40, 42 der Beton 29 und bildet dort "Betondübel", also Verankerungen, die dazu dienen, Schubkräfte aus dem Beton 29 in das betreffende flächige Bewehrungselement 30, 32, 34, oder 36 einzuleiten.The reinforcement elements 30, 32, 34, 36 are flat. For example, the reinforcement element 32 stands on the lower reinforcement 24, which is arranged within the concrete ceiling 20. The upper reinforcement 22 rests on the reinforcement element 32 and is in turn arranged in the upper concrete cover 26. At its upper edge region, the reinforcement element has 32 recesses (holes) 40, the diameter of which is adapted to the grain size of the concrete used and is usually larger than 32 mm. It also has recesses 42 on its lower edge region, the diameter of which is usually greater than 32 mm. The recesses 40, 42, which can also be referred to as openings, are preferably circular and are arranged vertically one above the other in this exemplary embodiment. After the introduction of the concrete 29, the concrete 29 extends through each of these recesses 40, 42 and forms "concrete dowels" there, that is to say anchorages which serve to push forces from the concrete 29 into the respective flat reinforcement element 30, 32, 34, or 36 initiate.
Femer sind die Bewehrungselemente 30, 32, 34, 36 bevorzugt in ihrem Mittelbereich mit Sicken 44 (Fig. 8) versehen, um eine bessere Verankerung im Beton 29 zu bewirken. Auch sind die Bewehrungselemente bevorzugt am oberen Rand mit Ausnehmungen 46 und am unteren Rand mit Ausnehmungen 48 versehen. Diese Ränder sehen dadurch gezahnt aus. Diese seitlichen Ausnehmungen 46, 48 verbessern die Aufnahme von horizontalen Kräften durch das betreffende Bewehrungselement.Furthermore, the reinforcement elements 30, 32, 34, 36 are preferably provided with beads 44 (FIG. 8) in their central region in order to achieve better anchoring in the concrete 29. The reinforcement elements are also preferably provided with recesses 46 at the upper edge and with recesses 48 at the lower edge. This makes these edges look serrated. These lateral recesses 46, 48 improve the absorption of horizontal forces by the reinforcement element in question.
Fig. 1 zeigt auch, wie an der Decke 20 links und rechts eine Querkraft Q angreift. Von unten wirkt diesen Kräften Q eine Gegenkraft F entgegen. Ferner greift rechts ein rechtsdrehendes Moment M und links ein dem Betrag nach gleich großes linksdrehendes Moment M' an. Diese Kräfte und Momente bewirken in der Decke 20 entsprechende Zug- und Schubspannungen.1 also shows how a lateral force Q acts on the ceiling 20 on the left and right. A counterforce F counteracts these forces Q from below. Furthermore, a right-hand turning moment M acts on the right and a left-turning moment M 'of the same magnitude acts on the left. These forces and moments cause corresponding tensile and shear stresses in the ceiling 20.
Fig. 4 zeigt im radialen Schnitt die Lastpfade in einer üblichen Art der Darstellung. Die Bezugszeichen sind dieselben wie bei Fig. 1 bis 3. Bei 50 ist eine Risszone angedeutet, in der bei hoher Belastung ein oder mehrere Risse im Beton 29 auftreten und wo die Decke 20 bei zu hoher Belastung gewöhnlich brechen würde. Die Bruchfläche hat dann etwa die Form eines Trichters oder Kegels, und man spricht deshalb auch von einem "Durchstanzkegel". Man erkennt, dass viele Lastpfade 52 vorhanden sind, welche quer und teilweise etwa senkrecht zu dieser Risszone 50 verlaufen und deshalb einem Bruch an dieser Stelle entgegenwirken.Fig. 4 shows in radial section the load paths in a conventional manner Presentation. The reference numerals are the same as in FIGS. 1 to 3. At 50, a crack zone is indicated, in which one or more cracks occur in the concrete 29 under high loads and where the ceiling 20 would normally break under too high loads. The fracture surface then has the shape of a funnel or cone, and this is why one speaks of a "punching cone". It can be seen that there are many load paths 52 which run transversely and partly approximately perpendicular to this crack zone 50 and therefore counteract a break at this point.
Die von der Stütze 10 ausgehenden Streben sind Druckstreben. Sie verankern sich im inneren Bereich des "Durchstanzkegels" an den oberen Betondübeln, also den Betondübeln in den Ausnehmungen 40. Dies ist die Lasteinleitung in das flächige Bewehrungsteil 32. Ab dieser Verankerung verlaufen die Streben, wie dargestellt, nur im flächigen Bewehrungsteil 32, und es bildet sich ein Schubfeld. Dieses bewirkt eine flächige Lastabtragung im Bewehrungsteil 32 bis in den schubunkritischen Bereich, welcher außerhalb der Risszone 50 liegt.The struts emanating from the support 10 are pressure struts. They anchor themselves in the inner area of the "punching cone" on the upper concrete dowels, that is, the concrete dowels in the recesses 40. This is the introduction of the load into the flat reinforcement part 32. From this anchoring, the struts run, as shown, only in the flat reinforcement part 32, and a push field is formed. This causes a flat load transfer in the reinforcement part 32 up to the non-thrust-critical area, which lies outside the crack zone 50.
Fig. 5 zeigt, ebenfalls in einer üblichen Darstellung, die Zug- bzw. Druckstreben im Schnitt. Auch hier erkennt man, dass die Zugstreben quer und etwa senkrecht zur Risszone 50 verlaufen, also quer und teilweise senkrecht zum "Durchstanzkegel", und dass sie deshalb einem Bruch an dieser Stelle entgegenwirken. Im Bereich der erwähnten "Betondübel" (an den Ausnehmungen 40, 42) finden sich nämlich viele Verankerungsmöglichkeiten. Treten bei Erreichen der Zugfestigkeit die ersten Risse im Beton 29 auf, so wird die Last nach Art eines Fächers über das gesamte flächige Bewehrungsteil 32 zu den "Betondübeln" verteilt, wie das die Fig. 4 und 5 anschaulich zeigen. Eine Mitwirkung des Betons 29 für die Zugstreben ist nicht erforderlich. Die Lasten werden über das flächige Bewehrungselement 30, 32 direkt nach dem Prinzip des Minimums der Formänderungsarbeit abgetragen. Somit bleiben die querkraftbedingten Risse 50 klein, und man erhält eine maximale Tragkraft der Decke 20.Fig. 5 shows, also in a conventional representation, the tension or compression struts in section. Here, too, it can be seen that the tension struts run transversely and approximately perpendicular to the crack zone 50, that is to say transversely and partially perpendicular to the “punching cone”, and that they therefore counteract a break at this point. There are many anchoring options in the area of the "concrete dowels" mentioned (at the recesses 40, 42). If the first cracks occur in the concrete 29 when the tensile strength is reached, the load is distributed in the manner of a fan over the entire flat reinforcement part 32 to form the “concrete anchors”, as is clearly shown in FIGS. 4 and 5. A participation of the concrete 29 for the tension struts is not necessary. The loads are transferred via the flat reinforcement element 30, 32 directly according to the principle of the minimum of the deformation work. The cracks 50 caused by the shear force thus remain small, and a maximum load-bearing capacity of the ceiling 20 is obtained.
Wenn also die Zugfestigkeit des Betons 29 in den Zug-Fachwerkstäben erreicht ist, übernimmt das flächige Bewehrungselement 32 die Funktion des Betons. Unterstellt man im Traglastzustand einen Starrkörpermechanismus, also eine Abtrennung der restlichen Decke 20 vom Durchstanzkegel 50, so erfolgt die Querkraftübertragung ausschließlich über das flächige Bewehrungselement 32. Es findet eine Entkopplung der Biege- und Schubbewehrung statt.When the tensile strength of the concrete 29 in the tensile truss bars has been reached, the flat reinforcement element 32 takes over the function of the concrete. Assuming a rigid body mechanism in the load state, that is to say a separation of the remaining ceiling 20 from the punching cone 50, the transverse force transmission takes place exclusively via the flat reinforcement element 32. The bending and shear reinforcement is decoupled.
Wenn der Grenzzustand der Tragfähigkeit erreicht ist, sollte das Versagen einer dargestellten Anordnung mit ausreichender Vorankündigung erfolgen. Hierfür ist die Duktilität des flächigen Bewehrungselements 30, 32 von Bedeutung. Bei einer solchen Anordnung werden nämlich die Querkräfte über das flächige Bewehrungselement 30, 32 übertragen. Wenn also die Tragkraft erreicht ist, versagt das flächige Bewehrungselement 30, 32, das bevorzugt aus Stahl hergestellt ist, und das Versagen ist ein duktiles Stahlversagen und nicht ein sprödes Betonversagen in Form eines Schub-Druckbruchs, d.h. das Versagen kündigt sich an und erfolgt nicht plötzlich. Dies ist auch wichtig bei Erdbeben.When the limit state of the load-bearing capacity is reached, the failure of an arrangement shown should be done with sufficient advance notice. The ductility of the flat reinforcement element 30, 32 is important for this. In such an arrangement, the transverse forces are namely transmitted via the flat reinforcement element 30, 32. When the load-bearing capacity is reached, the flat reinforcement element 30, 32, which is preferably made of steel, fails, and the failure is a ductile steel failure and not a brittle concrete failure in the form of a shear-pressure fracture, i.e. the failure announces itself and does not occur suddenly. This is also important in earthquakes.
Die "Betondübel" in den Ausnehmungen 40, 42 haben ein ausreichend elastisches Verhalten, und bei Ausfall eines dieser Betondübel werden die benachbarten Betondübel die Last übernehmen, d.h. es findet lediglich eine Umlagerung der Last statt. Die Ausnehmungen 40, 42 und die Sicken 44 unterstützen die Betondübel bei Verankerung der schrägen Druckstreben.The "concrete dowels" in the recesses 40, 42 have a sufficiently elastic behavior, and if one of these concrete dowels fails, the neighboring concrete dowels will take over the load, i.e. there is only a rearrangement of the load. The recesses 40, 42 and the beads 44 support the concrete dowels when anchoring the oblique struts.
Bei Bedarf können durch die Ausnehmungen 40, 42 Bewehrungsstäbe durchgeführt werden, und diese können auch mit Rödeldrähten an diesen Ausnehmungen befestigt werden. Dadurch erhält man eine weitere Verbesserung.If necessary, reinforcement bars can be passed through the recesses 40, 42, and these can also be attached to these recesses with crimped wires. This gives you a further improvement.
Fig. 6 zeigt eine isometrische Darstellung des Bewehrungsteils 32 der Fig. 1 bis 3. Es werden die gleichen Bezugszeichen verwendet.FIG. 6 shows an isometric illustration of the reinforcement part 32 of FIGS. 1 to 3. The same reference numerals are used.
Die Fig. 7, 8, 9 und 10 zeigen Einzelheiten des Ausführungsbeispiels gemäß den Fig. 1 bis 3 in verschiedenen Schnittebenen.7, 8, 9 and 10 show details of the embodiment according to FIGS. 1 to 3 in different sectional planes.
Naturgemäß sind im Rahmen der vorliegenden Erfindung vielfache weitere Abwandlungen und Modifikationen möglich. Naturally, numerous further modifications and modifications are possible within the scope of the present invention.

Claims

Patentansprüche claims
1. Stahlbeton- oder Spannbetonteil, welches durch eine Querkraft (Q) beanspruchbar ist und im montierten Zustand eine obere Seite und eine untere Seite aufweist, und in welchem im Bereich der oberen Seite (26) eine obere1. reinforced concrete or prestressed concrete part, which can be stressed by a transverse force (Q) and has an upper side and a lower side in the assembled state, and in which in the area of the upper side (26) an upper
Bewehrungslage (22) und im Bereich der unteren Seite (28) eine untereReinforcement layer (22) and a lower one in the area of the lower side (28)
Bewehrungslage (24) vorgesehen ist, ferner mit mindestens einem flächigen Bewehrungsteil (30, 32, 34, 36), welches zwischen der oberen Bewehrungslage (22) und der unterenReinforcement layer (24) is provided, furthermore with at least one flat reinforcement part (30, 32, 34, 36), which is between the upper reinforcement layer (22) and the lower one
Bewehrungslage (24) angeordnet ist, sich im wesentlichen über den gesamten Bereich zwischen diesenReinforcement layer (24) is arranged, essentially over the entire area between them
Bewehrungslagen (22, 24) erstreckt, im wesentlichen rechtwinklig zu einer Oberfläche des Stahl- oderReinforcement layers (22, 24) extends substantially perpendicular to a surface of the steel or
Spannbetonteils (20) verläuft, und welches bei einer Beanspruchung (Q; M) des Stahlbeton- oderPrestressed concrete part (20), and which with a stress (Q; M) of the reinforced concrete or
Spannbetonteils eine flächige Lastabtragung durch das flächigePrestressed concrete part a flat load transfer through the flat
Bewehrungsteil (30, 32, 34, 36) ermöglicht.Reinforcement part (30, 32, 34, 36) allows.
2. Stahlbeton- oder Spannbetonteil nach Anspruch 1 , bei welchem sich das flächige Bewehrungsteil (30, 32, 34, 36) beidseits einer Risszone (50) erstreckt, welche in dem Stahlbeton- oder Spannbetonteil (20) auftritt, wenn bei einer Beanspruchung (Q; M) die Zugfestigkeit des Betons (29) des Stahlbeton- oder Spannbetonteils (20) überschritten wird.2. Reinforced concrete or prestressed concrete part according to claim 1, in which the flat reinforcement part (30, 32, 34, 36) extends on both sides of a crack zone (50) which occurs in the reinforced concrete or prestressed concrete part (20) when a load ( Q; M) the tensile strength of the concrete (29) of the reinforced concrete or prestressed concrete part (20) is exceeded.
3. Stahlbeton- oder Spannbetonteil nach Anspruch 1 oder 2, bei welchem das flächige Bewehrungsteil (30, 32, 34, 36) Verankerungsmittel (40, 42) zur Verankerung des Betons am flächigen Bewehrungsteil (30, 32, 34, 36) aufweist, um über diese bei einer Beanspruchung (Q; M) des Stahlbetonoder Spannbetonteils (20) eine Einleitung von Schubkräften aus dem Beton in das flächige Bewehrungsteil (30, 32, 34, 36) zu ermöglichen.3. Reinforced concrete or prestressed concrete part according to claim 1 or 2, in which the flat reinforcement part (30, 32, 34, 36) has anchoring means (40, 42) for anchoring the concrete to the flat reinforcement part (30, 32, 34, 36), in order to enable shear forces from the concrete to be introduced into the flat reinforcement part (30, 32, 34, 36) when the reinforced concrete or prestressed concrete part (20) is subjected to a load (Q; M).
4. Stahlbeton- oder Spannbetonteil nach Anspruch 3, bei welchem die Verankerungsmittel (40, 42) des flächigen Bewehrungsteils (30, 32, 34, 36) beiderseits einer Risszone (50) vorgesehen sind, welche bei einer Beanspruchung (Q; M) in dem Stahlbeton- oder Spannbetonteil (20) auftritt, wenn die Zugfestigkeit des Betons (29) des Stahlbeton- oder Spannbetonteils (20) überschritten wird.4. Reinforced concrete or prestressed concrete part according to claim 3, wherein the anchoring means (40, 42) of the flat reinforcement part (30, 32, 34, 36) are provided on both sides of a crack zone (50), which at a Stress (Q; M) occurs in the reinforced concrete or prestressed concrete part (20) when the tensile strength of the concrete (29) of the reinforced concrete or prestressed concrete part (20) is exceeded.
5. Stahlbeton- oder Spannbetonteil nach Anspruch 3 oder 4, bei welchem die Verankerungsmittel als eine Mehrzahl von Ausnehmungen (40, 42) ausgebildet sind, deren Größe derart ausgebildet ist, dass sich Betondübel darin ausbilden.5. Reinforced concrete or prestressed concrete part according to claim 3 or 4, in which the anchoring means are designed as a plurality of recesses (40, 42), the size of which is designed such that concrete dowels form therein.
6. Stahlbeton- oder Spannbetonteil nach einem der Ansprüche 1 bis 5, bei welchem das flächige Bewehrungsteil (30, 32, 34, 36) Sicken (44) aufweist.6. Reinforced concrete or prestressed concrete part according to one of claims 1 to 5, in which the flat reinforcement part (30, 32, 34, 36) has beads (44).
7. Stahlbeton- oder Spannbetonteil nach einem der Ansprüche 1 bis 6, bei welchem an mindestens einem Rand des flächigen Bewehrungsteils (30, 32) Aussparungen (46, 48) vorgesehen sind, welche sich zu diesem Rand hin öffnen.7. Reinforced concrete or prestressed concrete part according to one of claims 1 to 6, in which recesses (46, 48) are provided on at least one edge of the flat reinforcement part (30, 32), which open towards this edge.
8. Stahlbeton- oder Spannbetonteil nach einem der Ansprüche 1 bis 7, bei welchem das flächige Bewehrungsteil (30, 32, 34, 36) im Grundriss eine Form aufweist, welche nach Art eines U, V, einer Haarnadel, oder dergleichen ausgebildet ist (Fig. 2, 3).8. Reinforced concrete or prestressed concrete part according to one of claims 1 to 7, in which the flat reinforcement part (30, 32, 34, 36) has a shape in the plan, which is designed in the manner of a U, V, a hairpin, or the like ( Fig. 2, 3).
9. Stahlbeton- oder Spannbetonteil nach Anspruch 8, bei welchem das flächige Bewehrungsteil (30, 32, 34, 36) ein Bewehrungselement (12, 4) eines vertikalen Elements (10) umgreift.9. Reinforced concrete or prestressed concrete part according to claim 8, in which the flat reinforcement part (30, 32, 34, 36) engages around a reinforcement element (12, 4) of a vertical element (10).
10. Stahlbeton- oder Spannbetonteil nach Anspruch 9, bei welchem das Bewehrungselement (12, 14) des vertikalen Elements (10) im wesentlichen im Inneren eines Scheitels des dieses Bewehrungselement (12, 14) umgreifenden flächigen Bewehrungsteils (30, 32) angeordnet ist.10. Reinforced concrete or prestressed concrete part according to claim 9, in which the reinforcement element (12, 14) of the vertical element (10) is arranged substantially inside an apex of the flat reinforcement part (30, 32) encompassing this reinforcement element (12, 14).
11. Stahlbeton- oder Spannbetonteil nach einem der vorhergehenden Ansprüche, bei welchem das flächige Bewehrungsteil (30, 32, 34, 36) gewellt ist. 11. Reinforced concrete or prestressed concrete part according to one of the preceding claims, in which the flat reinforcement part (30, 32, 34, 36) is corrugated.
12. Stahlbeton- oder Spannbetonteil nach einem der vorhergehenden Ansprüche, bei welchem das flächige Bewehrungsteil (30, 32, 34, 36) im wesentlichen senkrecht zwischen den Bewehrungslagen (22, 24) verläuft.12. Reinforced concrete or prestressed concrete part according to one of the preceding claims, in which the flat reinforcement part (30, 32, 34, 36) extends substantially perpendicularly between the reinforcement layers (22, 24).
13. Stahlbeton- oder Spannbetonteil nach einem der vorhergehenden Ansprüche, bei welchem das flächige Bewehrungsteil hutförmig gebogen ist.13. Reinforced concrete or prestressed concrete part according to one of the preceding claims, in which the flat reinforcement part is hat-shaped.
14. Stahlbeton- oder Spannbetonteil nach einem der Ansprüche 1 bis 12, bei welchem das flächige Bewehrungsteil trapezförmig gebogen ist.14. Reinforced concrete or prestressed concrete part according to one of claims 1 to 12, in which the flat reinforcement part is bent trapezoidally.
15. Stahlbeton- oder Spannbetonteil nach einem der vorhergehenden Ansprüche, bei welchem im flächigen Bewehrungsteil Ausnehmungen (40, 42) vorgesehen sind, durch welche Bewehrungsstäbe durchgesteckt sind.15. Reinforced concrete or prestressed concrete part according to one of the preceding claims, in which recesses (40, 42) are provided in the flat reinforcement part, through which reinforcement bars are inserted.
16. Stahlbeton- oder Spannbetonteil nach Anspruch 15, bei welchem die Bewehrungsstäbe an den Ausnehmungen (40, 42) befestigt sind.16. Reinforced concrete or prestressed concrete part according to claim 15, in which the reinforcing bars are fastened to the recesses (40, 42).
17. Stahlbeton- oder Spannbetonteil nach einem der vorhergehenden Ansprüche, bei welchem das flächige Bewehrungsteil (30, 32, 34, 36) als Abstandshalter zwischen der oberen Bewehrungslage (22) und der unteren Bewehrungslage (24) ausgebildet ist.17. Reinforced concrete or prestressed concrete part according to one of the preceding claims, in which the flat reinforcement part (30, 32, 34, 36) is designed as a spacer between the upper reinforcement layer (22) and the lower reinforcement layer (24).
18. Stahlbeton- oder Spannbetonteil nach einem der vorhergehenden Ansprüche, bei welchem das flächige Bewehrungsteil (30, 32, 34, 36) aus Stahlblech ausgebildet ist.18. Reinforced concrete or prestressed concrete part according to one of the preceding claims, in which the flat reinforcement part (30, 32, 34, 36) is made of sheet steel.
19. Stahlbeton- oder Spannbetonteil nach einem der Ansprüche 1 bis 17, bei welchem das flächige Bewehrungsteil aus einem Kohlefaser-Werkstoff ausgebildet ist.19. Reinforced concrete or prestressed concrete part according to one of claims 1 to 17, in which the flat reinforcement part is formed from a carbon fiber material.
20. Stahlbeton- oder Spannbetonteil nach einem der Ansprüche 1 bis 17, bei welchem das flächige Bewehrungsteil aus einem Kunststoff oder einem Komposit-Werkstoff ausgebildet ist.20. Reinforced concrete or prestressed concrete part according to one of claims 1 to 17, in which the flat reinforcement part is formed from a plastic or a composite material.
21. Stahlbeton- oder Spannbetonteil nach einem der Ansprüche 3 bis 20, bei welchem die Verankerungsmittel (40, 42) an einem oberen und einem unteren Randbereich des flächigen Bewehrungsteils (30, 32) ausgebildet sind.21. Reinforced concrete or prestressed concrete part according to one of claims 3 to 20, which the anchoring means (40, 42) are formed on an upper and a lower edge region of the flat reinforcement part (30, 32).
22. Verfahren zum Herstellen eines für eine Querkraftbeanspruchung geeigneten Stahl- oder Spannbetonteils, mit folgenden Schritten: a) Eine untere Bewehrungslage wird errichtet; b) mindestens ein flächiges Bewehrungsteil zur Schubbewehrung wird auf die untere Bewehrungslage gelegt, so dass es im wesentlichen rechtwinklig zu dieser verläuft; c) eine obere Bewehrungslage wird auf dieses mindestens eine flächige Bewehrungsteil gelegt, so dass es als Abstandshalter zwischen der unteren und der oberen Bewehrungslage dient; d) das aus der unteren Bewehrungslage, dem mindestens einen flächigen Bewehrungsteil, und der oberen Bewehrungslage gebildete Teil wird mit Beton vergossen.22. A method for producing a steel or prestressed concrete part suitable for a shear load, with the following steps: a) a lower reinforcement layer is erected; b) at least one flat reinforcement part for shear reinforcement is placed on the lower reinforcement layer so that it is essentially perpendicular to it; c) an upper reinforcement layer is placed on this at least one flat reinforcement part, so that it serves as a spacer between the lower and the upper reinforcement layer; d) the part formed from the lower reinforcement layer, the at least one flat reinforcement part, and the upper reinforcement layer is poured with concrete.
23. Verfahren nach Anspruch 22, bei welchem das flächige Bewehrungsteil so auf die untere Bewehrungslage gelegt wird, dass es ein Bewehrungselement (12, 14) eines vertikalen Teils (10) umschließt.23. The method according to claim 22, wherein the flat reinforcement part is placed on the lower reinforcement layer such that it encloses a reinforcement element (12, 14) of a vertical part (10).
24. Stahlbeton- oder Spannbetonteil, welches durch eine Querkraft beanspruchbar ist und im montierten Zustand eine obere Seite und eine untere Seite aufweist, und in welchem im Bereich der oberen Seite (26) eine obere24. Reinforced concrete or prestressed concrete part, which can be loaded by a transverse force and has an upper side and a lower side in the assembled state, and in which an upper side in the region of the upper side (26)
Bewehrungslage (22) und im Bereich der unteren Seite (28) eine untereReinforcement layer (22) and a lower one in the area of the lower side (28)
Bewehrungslage (24) vorgesehen ist, ferner mit mindestens einem flächigen Bewehrungsteil (30, 32, 34, 36), welches zwischen der oberen Bewehrungslage (22) und der unterenReinforcement layer (24) is provided, furthermore with at least one flat reinforcement part (30, 32, 34, 36), which is between the upper reinforcement layer (22) and the lower one
Bewehrungslage (24) angeordnet ist, sich im wesentlichen über den gesamten Bereich zwischen diesenReinforcement layer (24) is arranged, essentially over the entire area between them
Bewehrungslagen (22, 24) erstreckt, im wesentlichen rechtwinklig zu einer Oberfläche des Stahlbeton- oderReinforcement layers (22, 24) extends, substantially perpendicular to a surface of the reinforced concrete or
Spannbetonteils (20) verläuft, und welches mit einer Mehrzahl von Ausnehmungen (40, 42) versehen ist, durch welche sich Betondübel erstrecken, welche bei einer Beanspruchung (Q; M) des Stahlbeton- oder Spannbetonteils eine flächige Lastabtragung durch das flächige Bewehrungsteil (30, 32, 34, 36) ermöglichen. Prestressed concrete part (20), and which is provided with a plurality of recesses (40, 42), through which concrete dowels extend which, when the reinforced concrete or prestressed concrete part is stressed (Q; M), enable a flat load transfer through the flat reinforcement part (30, 32, 34, 36).
EP01923551A 2000-01-20 2001-01-20 Slab reinforcement and its method of manufacturing Expired - Lifetime EP1248889B1 (en)

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DE10002383 2000-01-20
DE10002383A DE10002383A1 (en) 2000-01-20 2000-01-20 Transverse stressed steel or stressed concrete part has reinforcement layers on surfaces and a flat surface component placed at right angles to surface and over entire structural thickness between reinforcement layers
PCT/EP2001/000634 WO2001053623A2 (en) 2000-01-20 2001-01-20 Reinforced or pre-stressed concrete part which is subjected to a transverse force

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EP1248889A2 true EP1248889A2 (en) 2002-10-16
EP1248889B1 EP1248889B1 (en) 2012-01-18

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US20030154674A1 (en) 2003-08-21
WO2001053623A2 (en) 2001-07-26
ATE542000T1 (en) 2012-02-15
WO2001053623A3 (en) 2002-02-28
AU2001250302A1 (en) 2001-07-31
EP1248889B1 (en) 2012-01-18
DE10002383A1 (en) 2001-07-26
US7874110B2 (en) 2011-01-25

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