EP0016007B1 - Set of uni-oxially loaded, mesh-like reinforcing elements - Google Patents

Set of uni-oxially loaded, mesh-like reinforcing elements Download PDF

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Publication number
EP0016007B1
EP0016007B1 EP79900573A EP79900573A EP0016007B1 EP 0016007 B1 EP0016007 B1 EP 0016007B1 EP 79900573 A EP79900573 A EP 79900573A EP 79900573 A EP79900573 A EP 79900573A EP 0016007 B1 EP0016007 B1 EP 0016007B1
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reinforcement
reinforcing
elements
longitudinal reinforcement
reinforcing element
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French (fr)
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EP0016007A1 (en
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Franz Bucher
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/04Mats

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  • the invention relates to a set of uniaxial load-bearing, mat-like reinforcement elements of the same width for reinforced concrete slabs or the like, with an increasing tensile strength of the longitudinal reinforcement from reinforcement element to reinforcement element of the set.
  • Reinforcement meshes are manufactured in a large number of different types, which differ from each other in the distance between the longitudinal bars, the cross bars, the cross-sectional sizes, etc., but which have standardized lengths and widths. Such mats are usually produced in lengths of 6 m, while other lengths are also obtained by overlapping. Cuts require waste that can no longer be used, custom-made products, which of course are more expensive to order with longer delivery times, and the overlap of two mats requires careful laying and laying control. In practice, the dimensions of the reinforcement are treated as individual construction contracts. After determining the load, the engineer calculates each individual component and draws formwork and bending plans.
  • any required steel cross-sectional area required can be implemented in a wide range without loss, since the steel cross-section based on the meter width changes constantly between two limit values in relation to the different area that an element covers taking its distance from the neighboring element into account.
  • an element also covers areas of different sizes, so that the reinforcement can be adapted to the intended widths of a component significantly better than was previously the case.
  • the bar diameters in adjacent sets are selected such that the longitudinal bars have the same cross-sectional area within each set, but increasing cross-sectional areas from set to set. This ensures that elements with the same reference cross-sectional area but different numbers of rods result in different sets. For a specific related steel cross-sectional area, there are therefore always at least two elements that are different with regard to their rod spacing.
  • Reinforcement meshes of the same length and width are also combined into sets according to DE-AS 1 178192, the cross-sectional area of the longitudinal reinforcement increasing from reinforcement mesh to reinforcement mesh according to certain criteria.
  • This set of reinforcement meshes was also created in order to achieve simple adaptation of the reinforcement to increasing payloads with as few different meshes as possible.
  • AT-PS 314 162 describes a staggered surface reinforcement consisting of two overlapping reinforcement mats, each of which is shorter than the span of the reinforced concrete part to be manufactured.
  • the reinforcement meshes can be of the same or different lengths, have the same or different bar cross-sections, and form standardized parts of a modular system.
  • This area reinforcement is based on the knowledge that the steel cross-section is influenced 80% by the span and 20% by the loads and the plate thickness. This is an effort to cope with different spans and different load cases with as few different standardized mat types, and the overlap leads to a reduced number of different mat types. However, the laying itself is not made easier, but must be carried out and checked with particular care.
  • the object of the invention is now to create a set of mat-like reinforcement elements to create elements of the type mentioned at the outset, by means of which a further reduction in the types of reinforcement elements for everyday buildings, predominantly dedicated to residential purposes, called simplifying everyday construction, can be achieved, which enables simple counting without calculation and ultimately does not require any cuts.
  • the object is now achieved in that the length of the reinforcement elements of the set increases from reinforcement element to reinforcement element, and that the longitudinal reinforcement of each reinforcement element, which is preferably adapted to the moment, is designed for an essentially constant, approximately evenly distributed load per unit area that is common in everyday construction .
  • the length of the reinforcement elements increases from reinforcement element to reinforcement element in each case by approximately twice the minimum support length.
  • the invention is based on the following considerations: In the area of reinforced concrete application, a distinction can be made between the everyday buildings defined above and the so-called civil engineering, which deals with special construction tasks.
  • a set of prefabricated beams, which are used together with packing elements for the manufacture of prefabricated ceilings, can already be found in AT-PS 3 05 567 - a prefabricated beam is assigned to each span range. However, these are all reinforced equally, so that the tensile strength decreases with increasing length. Only the combination with fillers in different widths and heights enables the reinforcement elements to be used in the desired manner even with larger spans. In the case of reinforcements for on-site concreting to be laid on the construction site, this type of simplification is not possible without special laying instructions and laying checks, since a co-determining element corresponding to the filler is missing.
  • each mat-like reinforcement element according to the invention is matched to the clear width and is therefore designed differently for each reinforcement element of the set, the number of types to be produced is considerably reduced compared to conventional reinforcement elements, with the elimination of the calculation of those which are separate and others for the case Combinations of conventional reinforcement elements, the difficult installation and the necessary control result in significant time and cost savings.
  • the counting of the number of pieces for the installation width and the lining up of the reinforcement elements according to the invention is necessary.
  • the mat-like reinforcement elements can have, for example, between 2 and 6 m length differences of 20 cm and between 6 and 8 m length differences of 25 cm for clear widths.
  • the longitudinal reinforcement of a reinforcement element consists of reinforcement bars with the same cross-section. It is now provided according to the invention that the longitudinal reinforcement of the reinforcement elements of the set consists, in a manner known per se, of reinforcement bars with a cross section increasing from reinforcement element to reinforcement element.
  • An embodiment of the set according to the invention which reduces the transport weight and the steel requirement provides that the longitudinal reinforcement of a reinforcement element consists of reinforcement bars with the same steel quality and the longitudinal reinforcement of the reinforcement elements of the set consists of reinforcement bars with steel quality increasing from reinforcement element to reinforcement element, so that the cross section of the bars in all reinforcement elements can remain the same.
  • the reinforcement elements of the set can have a width for plate-shaped components, which one by the distance between two Ribs of a reinforced concrete rib ceiling corresponds to a certain unit of width (between 50 and 90 cm).
  • the table below shows reinforcement elements according to the invention from the set for clear widths between 2.00 m and 6.00 m.
  • the load on a reinforced concrete component made with reinforcement elements according to the invention can even be varied, although the design was carried out exclusively according to the tensile force resulting from a constant load capacity.
  • the load can be increased without reinforcement of the longitudinal reinforcement by increasing the ceiling thickness, whereby for the usual ceiling thicknesses in the table an increase of 2 cm means an increase of the load by 500 N / m 2 .
  • the limited usability in the table for slab thicknesses of 14, 16 and 18 cm does not depend on the reinforcement elements according to the invention but only on the slab thickness itself.
  • the tension wide, dependent tensile force can be used for successive areas of clear widths, these reinforcement elements of uniform width exceeding the support lengths, the number of which can be counted down to the laying width and can be laid by unskilled forces without further calculation and special laying regulations.
  • the number of reinforcement elements in the set corresponds to the clear width areas that occur in everyday construction, so that storage is limited to the lengths mentioned, cuts and losses of reinforcement steel as well as the production of special sizes and the complex overlapping of reinforcement elements are avoided.
  • the reinforcement element of this embodiment is composed of a flat mat part and a mat part which is integrated into this and has a beam-like shape, transverse reinforcement bars 3 being bent in a bow-like manner in the beam-like mat part.
  • the longitudinal reinforcement 8 is preferably adapted to the course of the moment.
  • each reinforcement element 1 is assigned to a span 6 and protrudes about this by twice the minimum support length 4.
  • This longitudinal reinforcement 8 of each reinforcement element of the series is designed for approximately the same uniformly distributed load, the length 7 of the reinforcement elements 1 in each case about twice the minimum support length 4 increases.
  • the reinforcement elements 1 for spans 6 between 2 and 6 m are graduated by 20 cm, between 6 and 8 m by 25 cm.
  • the gradations by twice the minimum support length 4 can be clearly seen from FIG. 2, in which all reinforcement elements 1 are shown lying on one side, aligned on a support.
  • the increasing tensile strength of the longitudinal reinforcement 8 within the set can be achieved, for example, by longitudinal reinforcement bars 2, the cross-section of which increases from reinforcement element to reinforcement element and / or whose steel quality increases.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

Elongated carrier reinforcement elements (1) have the same width and staged lengths (7). The staggering correspond preferably to the double of the lengths (4) supported by re-inforced concrete elements. The tensile strength of the elongate elements is calculated so that each element (1) is submitted to the same strain by surface unit. In this way, for 75% of the constructions (houses, etc.) reinforcement adapted to different spans, consisting of reinforcement elements (1) arranged side by side are obtained.

Description

Die Erfindung bezieht sich auf einen Satz von einachsig tragenden, mattenartigen Bewehrungselementen gleicher Breite für Stahlbetonmassivdecken od. dgl., mit einer von Bewehrungselement zu Bewehrungselement des Satzes ansteigenden Zugkraftaufnahmefähigkeit der Längsbewehrung.The invention relates to a set of uniaxial load-bearing, mat-like reinforcement elements of the same width for reinforced concrete slabs or the like, with an increasing tensile strength of the longitudinal reinforcement from reinforcement element to reinforcement element of the set.

Charakteristik des bekannten Standes der TechnikCharacteristic of the known prior art

Bewehrungsmatten werden in einer Vielzahl von verschiedenen Typen gefertigt, die sich untereinander durch den Abstand der Längsstäbe, der Querstäbe, durch die Querschnittsgrö- ßen usw. unterscheiden, die jedoch genormte Längen und Breiten aufweisen. Üblicherweise werden derartige Matten in Längen von 6 m erzeugt, während andere Längen auch durch Überlappung erhalten werden. Zuschnitte bedingen einen nicht weiter verwendbaren Abfall, Sonderanfertigungen die selbstverständlich teurere Herstellunq auf Bestellung mit längeren Lieferzeiten und die Überlappung zweier Matten eine sorgfältige Verlegung und Verlegekontrolle. In der Praxis werden die Bemessungen der Bewehrungen als Einzelbauaufträge behandelt. Der Ingenieur berechnet nach Ermittlung der Belastung jedes einzelne Bauglied und zeichnet Schal- und Biegepläne. Hiezu stehen ihm verschiedene Tabellen zur Verfügung, beispielsweise die Tabelle 8 im »Manuale dell'ingegnere civile e industriale«, 80. Ausgabe, 1971, Seite 712. Es folgen lohnintensives, zeitraubendes Schneiden, Biegen und Verlegen der Bewehrung (der Stab- bzw. Mattenbewehrung mit all ihren Fehlerquellen), die eine Baustellenabnahme durch den Ingenieur unbedingt notwendig machen.Reinforcement meshes are manufactured in a large number of different types, which differ from each other in the distance between the longitudinal bars, the cross bars, the cross-sectional sizes, etc., but which have standardized lengths and widths. Such mats are usually produced in lengths of 6 m, while other lengths are also obtained by overlapping. Cuts require waste that can no longer be used, custom-made products, which of course are more expensive to order with longer delivery times, and the overlap of two mats requires careful laying and laying control. In practice, the dimensions of the reinforcement are treated as individual construction contracts. After determining the load, the engineer calculates each individual component and draws formwork and bending plans. Various tables are available for this purpose, for example Table 8 in the "Manuale dell'ingegnere civile e industriale", 80th edition, 1971, page 712. This is followed by wage-intensive, time-consuming cutting, bending and laying of the reinforcement (the bar or Mesh reinforcement with all its sources of error), which make it absolutely necessary for the engineer to accept the construction site.

Es ist daher bereits versucht worden, diese Unzulänglichkeiten zu beheben und Bewehrungsmatten auf Vorrat herzustellen, wobei die große Zahl von allen Anforderungen entsprechenden Mattentypen herabgesetzt werden sollte.Attempts have therefore already been made to remedy these shortcomings and to produce reinforcement meshes in stock, the large number of mesh types which meet all requirements being reduced.

Beispielsweise ist aus der AT-PS 322 168 der Satz der eingangs genannten Art bekanntgeworden, der hinsichtlich der Belastbarkeit aufeinanderfolgende Bewehrungsmatten gleicher Länge beinhaltet, wobei die Längsstabanzahl von Matte zu Matte bei gleichbleibender Breite um eins erhöht ist. Aus dieser gegenseitigen Abstimmung der im Satz aufeinanderfolgenden Bewehrungselemente ergibt sich die Möglichkeit, die Elemente entweder dicht nebeneinander oder in einem wählbaren Abstand zu verlegen, der maximal dem Wert des Abstandes zwischen den Längsstäben in den Bewehrungselementen entspricht, und dadurch eine kontinuierliche Variation des bezogenen Stahlquerschnittes zu erzielen. Dadurch läßt sich in einem weiten Bereich jede beliebige erforderliche bezogene Stahlquerschnittsfläche ohne Verlust realisieren, da sich der auf den Meter Breite bezogene Stahlquerschnitt im Verhältnis zu der unterschiedlichen Fläche, die ein Element unter Berücksichtigung seines Abstandes vom Nachbarelement deckt, stetig zwischen zwei Grenzwerten ändert. Darüber hinaus deckt aber auch ein Element, je nach dem gewählten Abstand zum Nachbarelement, verschieden große Flächen, so daß die Bewehrung den vorgesehenen Breiten eines Bauteils bedeutend besser angepaßt werden kann als dies bisher der Fall war. Weiters sind in benachbarten Sätzen die Stabdurchmesser so gewählt, daß die Längsstäbe innerhalb jedes Satzes gleiche Querschnittsfläche, von Satz zu Satz aber zunehmende Querschnittsflächen haben. Hierdurch wird erreicht, daß sich in verschiedenen Sätzen Elemente mit gleicher bezogener Querschnittsfläche, aber unterschiedlicher Stabanzahl ergeben. Für eine bestimmte bezogene Stahlquerschnittsfläche stehen daher stets mindestens zwei hinsichtlich ihres Stababstandes unterschiedliche Elemente zur Verfügung.For example, from AT-PS 322 168 the sentence of the type mentioned at the outset has become known, which contains successive reinforcement meshes of the same length with regard to the load-bearing capacity, the length of the longitudinal bars being increased by one from mesh to mesh with the same width. This mutual coordination of the reinforcement elements that follow one another in the set results in the possibility of laying the elements either close to each other or at a selectable distance that corresponds at most to the value of the distance between the longitudinal bars in the reinforcement elements, and thereby a continuous variation of the related steel cross-section achieve. As a result, any required steel cross-sectional area required can be implemented in a wide range without loss, since the steel cross-section based on the meter width changes constantly between two limit values in relation to the different area that an element covers taking its distance from the neighboring element into account. In addition, depending on the selected distance to the neighboring element, an element also covers areas of different sizes, so that the reinforcement can be adapted to the intended widths of a component significantly better than was previously the case. Furthermore, the bar diameters in adjacent sets are selected such that the longitudinal bars have the same cross-sectional area within each set, but increasing cross-sectional areas from set to set. This ensures that elements with the same reference cross-sectional area but different numbers of rods result in different sets. For a specific related steel cross-sectional area, there are therefore always at least two elements that are different with regard to their rod spacing.

Bewehrungsmatten gleicher Länge und Breite sind auch nach der DE-AS 1 178192 zu Sätzen zusammengefaßt, wobei die Querschnittsfläche der Längsbewehrung von Bewehrungsmatte zu Bewehrungsmatte nach bestimmten Kriterien zunimmt. Auch dieser Satz von Bewehrungsmatten wurde geschaffen, um eine einfache Anpassung der Bewehrung an steigende Nutzlasten mit möglichst wenig verschiedenen Matten zu erzielen.Reinforcement meshes of the same length and width are also combined into sets according to DE-AS 1 178192, the cross-sectional area of the longitudinal reinforcement increasing from reinforcement mesh to reinforcement mesh according to certain criteria. This set of reinforcement meshes was also created in order to achieve simple adaptation of the reinforcement to increasing payloads with as few different meshes as possible.

Die AT-PS 314 162 beschreibt eine gestaffelte Flächenbewehrung aus zwei einander überlappt verlegten Bewehrungsmatten, von denen jede kürzer als die Spannweite des herzustellenden Stahlbetonteils ist. Die Bewehrungsmatten können gleich oder verschieden lang sein, gleiche oder verschiedene Stabquerschnitte aufweisen, und bilden genormte Teile eines Baukastensystems. Diese Flächenbewehrung beruht auf der Erkenntnis, daß der Stahlquerschnitt zu 80% von der Spannweite und zu 20% von den Belastungen und der Plattenstärke beeinflußt wird. Es liegt hierin das Bemühen, mit möglichst wenig verschieden genormten Mattentypen unterschiedlichen Spannweiten und unterschiedlichen Belastungsfällen gerecht zu werden, und die Überlappung führt zu einer verringerten Zahl von verschiedenen Mattentypen. Die Verlegung selbst wird jedoch nicht erleichtert, sondern muß besonders sorgfältig erfolgen und kontrolliert werden.AT-PS 314 162 describes a staggered surface reinforcement consisting of two overlapping reinforcement mats, each of which is shorter than the span of the reinforced concrete part to be manufactured. The reinforcement meshes can be of the same or different lengths, have the same or different bar cross-sections, and form standardized parts of a modular system. This area reinforcement is based on the knowledge that the steel cross-section is influenced 80% by the span and 20% by the loads and the plate thickness. This is an effort to cope with different spans and different load cases with as few different standardized mat types, and the overlap leads to a reduced number of different mat types. However, the laying itself is not made easier, but must be carried out and checked with particular care.

Aufgabe der ErfindungObject of the invention

Die Aufgabe der Erfindung liegt nun darin, einen Satz von mattenartigen Bewehrungselementen der eingangs genannten Art zu schaffen, durch die eine weitere Reduzierung der Bewehrungselementetypen für alltägliche, vorwiegend Wohnzwecken gewidmete Bauten, vereinfachend Alltagsbau genannt, erzielt werden kann, die eine einfache Abzählung ohne Berechnung ermöglicht, und schließlich keine Zuschnitte erfordert.The object of the invention is now to create a set of mat-like reinforcement elements to create elements of the type mentioned at the outset, by means of which a further reduction in the types of reinforcement elements for everyday buildings, predominantly dedicated to residential purposes, called simplifying everyday construction, can be achieved, which enables simple counting without calculation and ultimately does not require any cuts.

Darlegung des Wesens der ErfindungState the nature of the invention

Erfindungsgemäß wird die gestellte Aufgabe nun dadurch gelöst, daß die Länge der Bewehrungselemente des Satzes von Bewehrungselement zu Bewehrungselement zunimmt, und daß die vorzugsweise dem Momentenverlauf angepaßte Längsbewehrung jedes Bewehrungselementes für eine im wesentlichen konstante, im Alltagsbau übliche, etwa gleichmäßig verteilte Auflast pro Flächeneinheit ausgelegt ist.According to the invention, the object is now achieved in that the length of the reinforcement elements of the set increases from reinforcement element to reinforcement element, and that the longitudinal reinforcement of each reinforcement element, which is preferably adapted to the moment, is designed for an essentially constant, approximately evenly distributed load per unit area that is common in everyday construction .

Insbesondere ist dabei vorgesehen, daß die Länge der Bewehrungselemente, wie bei Fertigteilträgern an sich bekannt, von Bewehrungselement zu Bewehrungselement jeweils etwa um die doppelte Mindestauflagerlänge zunimmt.In particular, it is provided that the length of the reinforcement elements, as is known per se in precast girders, increases from reinforcement element to reinforcement element in each case by approximately twice the minimum support length.

Die Erfindung geht dabei von folgenden Überlegungen aus: Im Bereich der Stahlbetonanwendung kann man zwischen den vorstehend definierten Alltagsbauten und dem sogenannten Ingenieurbau unterscheiden, der sich mit speziellen Bauaufgaben beschäftigt.The invention is based on the following considerations: In the area of reinforced concrete application, a distinction can be made between the everyday buildings defined above and the so-called civil engineering, which deals with special construction tasks.

Das Verhältnis zueinander steht, wenn man von einer vereinfachten statistischen Auffassung ausgeht, ungefähr 75% für den Alltagsbau zu 25% für den Ingenieurbau. Der Ingenieurbau mit seinen speziellen Aufgaben erfordert in jedem Fall eine besondere Bearbeitung, die jedoch für den Alltagsbau ausschaltbar ist.The relationship to each other is, if one assumes a simplified statistical view, about 75% for everyday construction to 25% for civil engineering. Civil engineering with its special tasks requires special processing in any case, but this can be switched off for everyday construction.

Statistische Untersuchungen über die Auflast der Bauteile (Decken, Stürze, Unterzüge) im Alltagsbau brachten in den üblichen Spannweitenbereichen einen immer konstanten Wert mit einem Schwankungsbereich von ±5%. Dieser Schwankungsbereich ist ohne Bedeutung, da er durch die Sicherheitsfaktoren sowohl bei Stahl als auch bei Beton in der Bandbreite der Belastungen für den Alitagsbau ohnedies abgedeckt ist. Es kann daher im Alltagsbau ohne weiteres von einer im wesentlichen konstanten Auflast ausgegangen werden, so daß als einzig bestimmende Größe die Spannweite bzw. vereinfachend die lichte Weite verbleibt.Statistical investigations of the load on the components (ceilings, lintels, beams) in everyday construction showed a constant value with a fluctuation range of ± 5% in the usual span ranges. This fluctuation range is irrelevant, since it is covered by the safety factors for both steel and concrete in the range of loads for the daily construction anyway. In everyday construction, it can therefore be assumed that the load is essentially constant, so that the only determining factor is the span or, for simplification, the clear width.

Ein Satz von vorgefertigten Trägern, die zusammen mit Füllkörpern für die Herstellung von Fertigteildecken dienen, ist zwar bereits der AT-PS 3 05 567 zu entnehmen - dabei ist jedem Spannweitenbereich ein vorgefertigter Träger zugeordnet. Diese sind jedoch alle gleich bewehrt, so daß die Zugkraftaufnahmefähigkeit mit steigender Länge sinkt. Erst die Kombination mit Füllkörpern in verschiedenen Breiten und Höhen ermöglicht es, die Bewehrungselemente auch bei größeren Spannweiten in der gewünschten Weise einzusetzen. Bei auf der Baustelle zu verlegenden Bewehrungen für Ortbetonierung ist eine Vereinfachung dieser Art ohne besondere Verlegeanweisung und Verlegekontrolle nicht möglich, da ein mitbestimmendes, dem Füllkörper entsprechendes Element fehlt.A set of prefabricated beams, which are used together with packing elements for the manufacture of prefabricated ceilings, can already be found in AT-PS 3 05 567 - a prefabricated beam is assigned to each span range. However, these are all reinforced equally, so that the tensile strength decreases with increasing length. Only the combination with fillers in different widths and heights enables the reinforcement elements to be used in the desired manner even with larger spans. In the case of reinforcements for on-site concreting to be laid on the construction site, this type of simplification is not possible without special laying instructions and laying checks, since a co-determining element corresponding to the filler is missing.

Trotzdem die Längsbewehrung jedes erfindungsgemäßen mattenartigen Bewehrungselementes auf die lichte Weite abgestimmt ist, und daher für jedes Bewehrungselement des Satzes anders ausgelegt ist, verringert sich die Zahl der zu erzeugenden Typen gegenüber herkömmlichen Bewehrungselemente beträchtlich, wobei der Wegfall der Berechnung der für den Fall gesonderten und anderen Kombinationen von herkömmlichen Bewehrungselementen, der erschwerten Verlegung und der erforderlichen Kontrolle bedeutende Ersparnisse an Zeit und Kosten erbringt. Für die Bemessung der Bewehrung in den erwähnten Alltagsbauten ist nur die Festlegung der lichten Weite, die Abzählung der Stückzahlen für die Verlegebreite und die Aneinanderreihung der erfindungsgemäßen Bewehrungselemente erforderlich.In spite of the fact that the longitudinal reinforcement of each mat-like reinforcement element according to the invention is matched to the clear width and is therefore designed differently for each reinforcement element of the set, the number of types to be produced is considerably reduced compared to conventional reinforcement elements, with the elimination of the calculation of those which are separate and others for the case Combinations of conventional reinforcement elements, the difficult installation and the necessary control result in significant time and cost savings. For the dimensioning of the reinforcement in the mentioned everyday buildings only the determination of the clear width, the counting of the number of pieces for the installation width and the lining up of the reinforcement elements according to the invention is necessary.

Diese Arbeitsschritte sind leicht und auch von bewehrungstechnisch ungebildeten Personen ohne Probleme durchführbar.These work steps are easy and can also be carried out by people who are not well trained in reinforcement technology.

Die mattenartigen Bewehrungselemente können beispielsweise für lichte Weiten zwischen 2 und 6 m Längenunterschiede von 20 cm und zwischen 6 und 8 m Längenunterschiede von 25cm aufweisen.The mat-like reinforcement elements can have, for example, between 2 and 6 m length differences of 20 cm and between 6 and 8 m length differences of 25 cm for clear widths.

Für lichte Weiten zwischen 2 und 8 m ergeben sich daraus nur 25 verschiedene Bewehrungselemente in gestaffelten Längen und unterschiedlicher Auslegung der Längsbewehrung, die sämtlichen Anforderungen genügen, wobei deren statistische Erfassung ergab, daß bereits mit 15 verschieden langen, erfindungsgemäßen Bewehrungselementen für 90% der Alltagsbauten das Auslangen gefunden wird.For clear widths between 2 and 8 m, this results in only 25 different reinforcement elements in staggered lengths and different designs of the longitudinal reinforcement, which meet all requirements, whereby their statistical recording showed that with 15 differently long reinforcement elements according to the invention for 90% of everyday buildings Auslangen is found.

In einer Ausführung besteht die Längsbewehrung e:nes Bewehrungselementes, wie nach der AT-PS 322168, aus Bewehrungsstäben mit gleichem Querschnitt. Dabei ist nun erfindungsgemäß vorgesehen, daß die Längsbewehrung der Bewehrungselemente des Satzes in an sich bekannter Weise aus Bewehrungsstäben mit von Bewehrungselement zu Bewehrungselement ansteigendem Querschnitt besteht. Eine das Transportgewicht und den Stahlbedarf verringernde Ausführung des erfindungsgemäßen Satzes sieht vor, daß die Längsbewehrung eines Bewehrungselementes aus Bewehrungsstäben mit gleicher Stahlqualität und die Längsbewehrung der Bewehrungselemente des Satzes aus Bewehrungsstäben mit sich von Bewehrungselement zu Bewehrungselement erhöhender Stahlqualität bestehen, so daß der Querschnitt der Stäbe in allen Bewehrungselementen gleich bleiben kann.In one version, the longitudinal reinforcement of a reinforcement element, as in AT-PS 322168, consists of reinforcement bars with the same cross-section. It is now provided according to the invention that the longitudinal reinforcement of the reinforcement elements of the set consists, in a manner known per se, of reinforcement bars with a cross section increasing from reinforcement element to reinforcement element. An embodiment of the set according to the invention which reduces the transport weight and the steel requirement provides that the longitudinal reinforcement of a reinforcement element consists of reinforcement bars with the same steel quality and the longitudinal reinforcement of the reinforcement elements of the set consists of reinforcement bars with steel quality increasing from reinforcement element to reinforcement element, so that the cross section of the bars in all reinforcement elements can remain the same.

Die Bewehrungselemente des Satzes können für plattenförmige Bauteile eine Breite aufweisen, die einer durch den Abstand zwischen zwei Rippen einer Stahlbetonrippendecke bestimmten Breiteneinheit (zwischen 50 und 90 cm) entspricht.The reinforcement elements of the set can have a width for plate-shaped components, which one by the distance between two Ribs of a reinforced concrete rib ceiling corresponds to a certain unit of width (between 50 and 90 cm).

Die nachstehende Tabelle zeigt erfindungsgemäße Bewehrungselemente aus dem Satz für lichte Weiten zwischen 2,00 mund 6,00 m.

Figure imgb0001
The table below shows reinforcement elements according to the invention from the set for clear widths between 2.00 m and 6.00 m.
Figure imgb0001

Wie aus der Tabelle ersichtlich, kann sogar die Auflast eines mit erfindungsgemäßen Bewehrungselementen hergestellten Stahlbetonbauteiles variiert werden, obwohl die Bemessung ausschließlich nach der aus einer konstanten Belastbarkeit resultierenden Zugkraft erfolgte. Die Erhöhung der Auflast kann ohne Verstärkung der Längsbewehrung durch Erhöhung der Dekkendicke erfolgen, wobei bei den in der Tabelle für den Alltagsbau üblichen Deckendicken eine Erhöhung um 2 cm eine Vergrößerung der Auflast um 500 N/m2 bedeutet. Die in der Tabelle bei Deckendicken von 14, 16 und 18 cm begrenzte Verwendbarkeit ist nicht von den erfindungsgemäßen Bewehrungselementen sondern nur von der Deckendicke selbst abhängig.As can be seen from the table, the load on a reinforced concrete component made with reinforcement elements according to the invention can even be varied, although the design was carried out exclusively according to the tensile force resulting from a constant load capacity. The load can be increased without reinforcement of the longitudinal reinforcement by increasing the ceiling thickness, whereby for the usual ceiling thicknesses in the table an increase of 2 cm means an increase of the load by 500 N / m 2 . The limited usability in the table for slab thicknesses of 14, 16 and 18 cm does not depend on the reinforcement elements according to the invention but only on the slab thickness itself.

Unter der Voraussetzung der im Alltagsbau statistisch nachweisbaren im wesentlichen konstanten Auflast und bei Bemessung der Längsbewehrung auf Grund der nach einer quadratischen Gleichung zunehmenden, von der Spannweite abhängigen Zugkraft können für aufeinanderfolgende Bereiche lichter Weiten diese um die Auflagerlängen übertreffende Bewehrungselemente einheitlicher Breite verwendet werden, deren Anzahl auf die Verlegebreite abgezählt und ohne weitere Berechnung und besondere Verlegevorschriften von ungelernten Kräften verlegt werden kann. Die Anzahl der Bewehrungselemente des Satzes entspricht der im Alltagsbau vorkommenden Bereiche lichter Weiten, so daß die Lagerhaltung auf die erwähnten Längen beschränkt ist, Zuschnitte und Verluste an Bewehrungsstahl sowie die Herstellung von Sondergrößen sowie die aufwendige Überlappung von Bewehrungselementen vermieden werden.Assuming the statistically verifiable essentially constant load in everyday construction and when dimensioning the longitudinal reinforcement due to the increasing by a quadratic equation, the tension wide, dependent tensile force can be used for successive areas of clear widths, these reinforcement elements of uniform width exceeding the support lengths, the number of which can be counted down to the laying width and can be laid by unskilled forces without further calculation and special laying regulations. The number of reinforcement elements in the set corresponds to the clear width areas that occur in everyday construction, so that storage is limited to the lengths mentioned, cuts and losses of reinforcement steel as well as the production of special sizes and the complex overlapping of reinforcement elements are avoided.

Beschreibung eines bevorzugten AusführungsbeispielsDescription of a preferred embodiment

Nachstehend wird nun die Erfindung an Hand der Figuren der beiliegenden Zeichnung näher beschrieben, ohne jedoch darauf beschränkt zu sein. Es zeigt

  • Fig. 1 in Schrägansicht eine bevorzugte Ausführung eines Bewehrungselementes aus einem erfindungsgemäßen Satz,
  • Fig. 2 schematisch mehrere Bewehrungselemente aus einem erfindungsgemäßen Satz in einer vergleichenden Gegenüberstellung.
The invention will now be described in more detail below with reference to the figures of the accompanying drawing, but without being restricted thereto. It shows
  • 1 in an oblique view a preferred embodiment of a reinforcement element from a set according to the invention,
  • Fig. 2 shows schematically several reinforcement elements from a set according to the invention in a comparative comparison.

Ein Bewehrungselement 1 nach Fig. 1 besteht aus Längsbewehrungsstäben 2 und Querbewehrungsstäben 3, die miteinander verschweißt sind. Das Bewehrungselement dieser Ausführung setzt sich aus einem ebenen Mattenteil und einem in diesen integrierten, trägerähnlich geformten Mattenteil zusammen, wobei im trägerähnlichen Mattenteil Querbewehrungsstäbe 3 bügelartig abgebogen sind. Die Längsbewehrung 8 ist vorzugsweise an den Momentverlauf angepaßt.1 consists of longitudinal reinforcement bars 2 and transverse reinforcement bars 3, which are welded together. The reinforcement element of this embodiment is composed of a flat mat part and a mat part which is integrated into this and has a beam-like shape, transverse reinforcement bars 3 being bent in a bow-like manner in the beam-like mat part. The longitudinal reinforcement 8 is preferably adapted to the course of the moment.

Wie Fig. 2 zeigt, ist jedes Bewehrungselement 1 einer Spannweite 6 zugeordnet und überragt diese etwa um die doppelte Mindestauflagerlänge 4. Diese Längsbewehrung 8 jedes Bewehrungselementes der Reihe ist jeweils für etwa dieselbe gleichmäßig verteilte Auflast ausgelegt, wobei die Länge 7 der Bewehrungselemente 1 jeweils um etwa die doppelte Mindestauflagerlänge 4 zunimmt. Beispielsweise sind die Bewehrungselemente 1 für Spannweiten 6 zwischen 2 und 6 m um 20 cm, zwischen 6 und 8 m um 25 cm abgestuft. Die Abstufungen um die doppelte Mindestauflagerlänge 4 sind aus Fig. 2 deutlich erkennbar, in der alle Bewehrungselemente 1 einseitig ausgerichtet auf einem Auf!ager aufliegend dargestellt sind.As shown in FIG. 2, each reinforcement element 1 is assigned to a span 6 and protrudes about this by twice the minimum support length 4. This longitudinal reinforcement 8 of each reinforcement element of the series is designed for approximately the same uniformly distributed load, the length 7 of the reinforcement elements 1 in each case about twice the minimum support length 4 increases. For example, the reinforcement elements 1 for spans 6 between 2 and 6 m are graduated by 20 cm, between 6 and 8 m by 25 cm. The gradations by twice the minimum support length 4 can be clearly seen from FIG. 2, in which all reinforcement elements 1 are shown lying on one side, aligned on a support.

Wie erwähnt, kann die innerhalb des Satzes ansteigende Zugkraftaufnahmefähigkeit der Längsbewehrung 8 beispielsweise durch Längsbewehrungsstäbe 2 erzielt werden, deren Querschnitt von Bewehrungselement zu Bewehrungselement ansteigt und/oder deren Stahlqualität sich erhöht.As mentioned, the increasing tensile strength of the longitudinal reinforcement 8 within the set can be achieved, for example, by longitudinal reinforcement bars 2, the cross-section of which increases from reinforcement element to reinforcement element and / or whose steel quality increases.

Claims (4)

1. A set of uniaxially supporting, mat-like reinforcing elements (1) of equal width for steel-reinforced concrete floors or the like, having a tensile load carrying capacity in respect of the longitudinal reinforcement (8), which rises from one reinforcing element of the set to another, characterised in that the length (7) of the reinforcing elements (1) of the set increases from one reinforcing element to another, and that the longitudinal reinforcement (8) of each reinforcing element (1), which longitudinal reinforcement is preferably adapted to the moment characteristics, is designed for a substantial constant, approximately uniformly distributed applied load per unit of area, being the load which is usual in ordinary everyday building.
2. A set according to claim 1 characterised in that the length (7) of the reinforcing elements (1) increases from each reinforcing element to another approximately by double the minimum bearing length (4), as is known per se in relation to prefabricated bearers.
3. A set according to claim 1 or c!aim 2 wherein the longitudinal reinforcement (8) of a reinforcing element (1) comprises reinforcing bars (2) of the same cross-section, characterised in that the longitudinal reinforcement (8) of the reinforcing elements (1) of the set comprises in per se known manner, reinforcing bars (2) with a cross-section which increases form one reinforcing element to the other.
4. A set according to claim 1 or claim 2 characterised in that the longitudinal reinforcement (8) of a reinforcing element (1) comprises reinforcing bars (2) of the same quality of steel and the longitudinal reinforcement (8) of the reinforcing elements (1) of the set comprises reinforcing bars (2) with a quality of steel which is increased from one reinforcing element to another.
EP79900573A 1978-06-19 1980-01-29 Set of uni-oxially loaded, mesh-like reinforcing elements Expired EP0016007B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT442978A AT355273B (en) 1978-06-19 1978-06-19 ROW OF UNIFORM REINFORCEMENTS
AT4429/78 1978-06-19

Publications (2)

Publication Number Publication Date
EP0016007A1 EP0016007A1 (en) 1980-10-01
EP0016007B1 true EP0016007B1 (en) 1982-06-02

Family

ID=3563909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79900573A Expired EP0016007B1 (en) 1978-06-19 1980-01-29 Set of uni-oxially loaded, mesh-like reinforcing elements

Country Status (12)

Country Link
EP (1) EP0016007B1 (en)
JP (1) JPS55500712A (en)
AT (1) AT355273B (en)
BE (1) BE877036A (en)
CH (1) CH647291A5 (en)
DD (1) DD144431A5 (en)
DE (2) DE7936810U1 (en)
HU (1) HU180433B (en)
IT (1) IT1121431B (en)
MX (1) MX148393A (en)
NL (1) NL7904716A (en)
WO (1) WO1980000089A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088072B1 (en) * 1982-03-02 1986-06-04 BUCHER, Franz Reinforcing elements

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1178192B (en) * 1955-07-30 1964-09-17 Willi Neumann Dr Reinforcement mesh row with increasing useful cross-section
AT305567B (en) * 1965-09-24 1973-03-12 Karl Leitl Dipl Ing Set of prefabricated beams for the production of precast ceilings

Also Published As

Publication number Publication date
DD144431A5 (en) 1980-10-15
EP0016007A1 (en) 1980-10-01
NL7904716A (en) 1979-12-21
CH647291A5 (en) 1985-01-15
ATA442978A (en) 1979-07-15
AT355273B (en) 1980-02-25
DE7936810U1 (en) 1980-07-03
BE877036A (en) 1979-10-15
DE2962993D1 (en) 1982-07-22
WO1980000089A1 (en) 1980-01-24
MX148393A (en) 1983-04-18
IT7923632A0 (en) 1979-06-15
HU180433B (en) 1983-03-28
JPS55500712A (en) 1980-10-02
IT1121431B (en) 1986-04-02

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