DE4123595A1

DE4123595A1 - Pattern and layers of steel reinforcement in concrete. - consist of multiple layer arrangement of reinforcement bars in concrete plate forms, esp. in square forms.

Info

Publication number: DE4123595A1
Application number: DE19914123595
Authority: DE
Inventors: Stefan Prof Dipl Ing D Polonyi
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-07-17
Filing date: 1991-07-17
Publication date: 1993-01-21

Abstract

Three layers of steel reinforcement grids (4) are laid to form a reinforced concrete plate (1). The particular pattern arrangement of the reinforcement is designed to achieve max. strength. The three layers of steel grids may consist of rods at right-angles to each other. One of the grids may be laid at 45 degrees to the other grids USE/ADVANTAGE - A saving of 50% on steel reinforcement free laid. Strength of the reinforced structure is maximised.

Description

Die Erfindung betrifft eine Stahlbeton-Platte, insbesondere quadratische Stahlbeton-Platte.The invention relates to a reinforced concrete slab, in particular square Reinforced concrete slab.

Bei der Bewehrung von freigelagerten, quadratischen Stahlbeton-Platten kann gemäß der neuen Stahlbeton-Konzeption über 50% Stahl eingespart werden (1). Bei Rechteck- und Durchlaufplatten ist die Einsparung ge ringer, jedoch immer noch beträchtlich.For the reinforcement of exposed, square reinforced concrete slabs can save over 50% steel according to the new reinforced concrete concept be (1). With rectangular and continuous plates, the savings are ge wrestler, but still considerable.

Die optimale Bewehrungsanordnung wurde in Anlehnung an (1) in (2) ermittelt (Bild 1). Die Traglast der so bewehrten Platten ist durch einen Versuch noch zu bestätigen. Die Bewehrung durchlaufender Platten ist beispielhaft auf Bild 2 dargestellt. Ein Berechnungsverfahren für die Berechnung solcher Platten ist noch zu entwickeln.The optimal reinforcement arrangement was determined based on (1) in (2) ( Figure 1). The load-bearing capacity of the panels reinforced in this way has to be confirmed by a test. The reinforcement of continuous slabs is shown as an example in Figure 2. A calculation method for the calculation of such plates is still to be developed.

Nun stellte sich die Frage, wie dann diese, dem Tragverhalten besser angepaßte, Bewehrung mit geringem Lohnaufwand verlegt werden. Eine besondere Bedingung war, daß die Bewehrung nur in maximal drei La gen angeordnet werden darf. So ist der Bewehrungs-Teppich entwickelt worden.Now the question arose, how then this, the carrying behavior better adapted, reinforcement can be laid with low wages. A A special condition was that the reinforcement should only be used in a maximum of three may be ordered. This is how the reinforcement carpet is developed been.

Der Betonstahl-Teppich besteht aus parallelen Stäben, die mit zwei Stahlbändern mittels Widerstandsschweißung verbunden sind. Die Stahl bänder sichern den Stababstand und verhindern die Parallelverschie bung der Stäbe untereinander. Die geringe Dicke der Stahlbänder ge stattet es, die nächste Bewehrungslage in beliebiger Richtung aufzu legen, ohne daß die Anordnung der dritten Lage dadurch beeinflußt wird. Diese vorgefertigte Bewehrung kann wie ein Teppich auf- und ausgerollt werden. Die Betonstahl-Teppiche lassen sich angenehm trans portieren und verlegen. Überlappungsstöße sind nicht erforderlich.The reinforcing steel carpet consists of parallel bars with two Steel straps are connected by resistance welding. The steel Bands secure the bar spacing and prevent parallel displacement Exercise the bars with each other. The small thickness of the steel strips ge enables the next reinforcement layer to be opened in any direction without affecting the arrangement of the third layer becomes. This prefabricated reinforcement can be opened and closed like a carpet be rolled out. The reinforcing steel carpets can be pleasantly trans port and move. Overlap joints are not required.

Die Stäbe der Baustahl-Teppiche können an den gewünschten Stellen be reits mit Abstandshaltern versehen werden.The rods of the structural steel carpets can be in the desired places already be provided with spacers.

Die numerisch gesteuerte Fertigungsanlage hat einen denkbar geringen Platzbedarf, da die Betonstahl-Teppiche von der Rolle gefertigt und gleich wieder aufgerollt werden.The numerically controlled manufacturing plant has a very small one Requires space because the rebar rugs are made from the roll and be rolled up again immediately.

Die Bilder 3 bis 4 stellen weitere Ausführungsformen zur Ver legung von Bewehrungslagen in Stahlbeton-Platten dar.Figures 3 to 4 illustrate further embodiments for Ver interpretation of layers of reinforcement in reinforced concrete plates are.

1) Gersiek, M .:
Load-bearing behavior of square, freely rotatable and slidable reinforced concrete slabs depending on the reinforcement.
Dissertation University of Dortmund 1990.
2) Wittler, D .:
Reinforcement proposal for rectangular, freely rotatable, freely movable reinforced concrete slabs based on the plastic hinge theory.
Diploma thesis University of Dortmund 1990/91.

Claims

1. Reinforced concrete slab ( 1 ), in particular square reinforced concrete slab, with a reinforcing steel carpet ( 2 ) as reinforcement from up to three rollable or rolled-out reinforcement layers ( 3 ).

2. Reinforced concrete slab according to claim 1, characterized in that the reinforcement layers ( 3 ) with reinforcing bars ( 4 ) crossing in any direction can be rolled out or arranged one above the other.

3. Reinforced concrete slab according to claim 1 or 2, characterized in that the reinforcement layers ( 3 ) each from two ver in the roll-out direction, arranged at a predetermined distance from each other steel strips ( 5 ) and transversely to the roll-out direction at predetermined distances from each other parallel reinforcement bars ( 6 ) exist, which che fixed to the steel strips ( 5 ), z. B. are welded to the steel strips ( 6 ).

4. Reinforced concrete slab according to one of claims 1 to 3, characterized in that in the case of a square reinforced concrete slab ( 1 ) two reinforcement layers ( 3 ), each with a reinforcement carpet ( 2 ) at right angles or at 90 ° - Reinforcing bars ( 6 ) crossing angles and a further reinforcement layer ( 3 ) made of four reinforcement carpets ( 2 ) laid diagonally or at a 45 ° angle are provided, the four reinforcement carpets ( 2 ) having an uncovered central plate area ( 7 ). limit.

5. Reinforced concrete slab according to one of claims 1 to 4, characterized in that the reinforcement layers ( 3 ) are provided at predetermined points with spacers.