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EP0215148A1 - Connecting means for a composite concrete supporting construction - Google Patents

Connecting means for a composite concrete supporting construction Download PDF

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Publication number
EP0215148A1
EP0215148A1 EP85111721A EP85111721A EP0215148A1 EP 0215148 A1 EP0215148 A1 EP 0215148A1 EP 85111721 A EP85111721 A EP 85111721A EP 85111721 A EP85111721 A EP 85111721A EP 0215148 A1 EP0215148 A1 EP 0215148A1
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EP
European Patent Office
Prior art keywords
concrete
holes
slab
bars
profile
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EP85111721A
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German (de)
French (fr)
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EP0215148B1 (en
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Wolfhart Dr.-Ing. Andrä
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Priority to AT85111721T priority Critical patent/ATE59685T1/en
Priority to DE8585111721T priority patent/DE3581080D1/en
Priority to EP85111721A priority patent/EP0215148B1/en
Publication of EP0215148A1 publication Critical patent/EP0215148A1/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/293Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
    • E04C3/294Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete of concrete combined with a girder-like structure extending laterally outside the element
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17Floor structures partly formed in situ
    • E04B5/23Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/29Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated the prefabricated parts of the beams consisting wholly of metal

Definitions

  • Composite means for transmitting forces between the steel girder and the concrete slab in the case of composite girder structures which consist of steel profile bars welded in the longitudinal direction onto the belt of the girder and which engage in the concrete of the slab are known.
  • Compound material made of flat bars with a rectangular cross-section, which are closely spaced on one side with transverse ribs and rest on the belt of the steel girder with the other, smooth side and are connected to this by fillet welds.
  • the welded flat bar creates a toothing in the contact surface between the concrete slab and the steel belt, through which shear forces can be transmitted in the longitudinal direction of the beam.
  • shear forces can be transmitted in the longitudinal direction of the beam.
  • reinforcement loops or headed dowels running in the direction of the slab thickness are additionally required, which are welded onto the belt or flat bar and anchored in the concrete slab.
  • Head bolts can also be anchored in a corresponding manner.
  • the transmission of the shear force takes place here by means of teeth, the concrete teeth engaging in the web holes of the U-profile from above. Compared to the perforated flat steel profile, it is advantageous here that there are also larger aggregate grains . in the center of the hole in front of the U-bar, which increases the shear strength in the horizontal shear surface in the upper edge of the U-bar.
  • the dowels or loops can only be installed at the construction site without welding and in a simple manner, they are still used by specially trained, i.e. reinforcement elements provided with thickened sections. Furthermore, the web parts of the U-profile that remain between the holes are subjected to bending in the vertical direction due to the anchoring of the dowels or loops, which locally leads to larger hole spacings. Furthermore, it must be ensured that when concreting the slab the Profile enclosed cavity is properly filled with concrete.
  • the disadvantage here is that dirt or water can easily accumulate in the cavity, which makes it difficult to produce perfect concrete quality in this highly stressed area. (The same naturally also applies to the concrete in the perforated area of the flat bar).
  • the invention is therefore based on the object to achieve the anchoring of the concrete slab without special loops or dowels and to increase the load-bearing capacity of the profiled bars as a compound and thus to make better use of them in economic and constructive terms.
  • the solution consists in that the cross-sectional parts of the profiled bars which generally protrude at right angles from the carrier belt are provided with through holes at close intervals, the clear width of which is greater than the diameter of the largest grain of the concrete and that thus two-section, dowel-like connections between the concrete slab and profile bar are formed by the concrete in the hole area in the horizontal direction.
  • the shear surfaces run perpendicular. This means that shear forces that are twice as high can be transmitted with the same hole cross-section and through holes, since the dowel-like connections between the concrete slab and profile bar can be used in two sections.
  • the generally perpendicular, perforated cross-sectional parts also prevent the accumulation of dirt or water in the perforated area and ensure the production of perfect concrete at this point.
  • a very significant advantage of the design or arrangement of the profiled bars according to the invention is that shear forces can be transmitted in any direction via the concrete which penetrates through the holes in the profiled bar in a dowel manner, i.e. So also at right angles to the level of the belt surface so that the concrete slab is prevented from lifting from the steel belt from the outset.
  • FIGS. 1 to 4 Vertical sections through the bonded area at right angles to the beam span or in the case of FIGS. 1b and 4b also in the direction of the beam span are shown here.
  • Fig. 1 shows a profile bar 2 with a rectangular cross-section, which is welded with its narrow side by 2 fillet welds 4 in the longitudinal direction on the carrier belt 1.
  • the profile bar 2 (flat bar) has holes 3 in its cross-sectional part projecting from the belt at close intervals, as can be seen from FIG. 1b.
  • a U-profile with flanges 7 projecting from the belt is welded onto the carrier belt 1 with the aid of the two fillet welds 4.
  • Holes 3 are made in close spacing in both flanges 7.
  • a multi-section dowel is thus obtained between the concrete slab and the carrier belt.
  • bow-like reinforcement bars 8 are inserted, which are anchored in the steel plate 6.
  • short steel bolts 5 can also be inserted through the holes, which fill the entire hole cross section and can be hooked into the stirrup-like reinforcing bars running in the longitudinal direction.
  • T-section is shown as a profile bar, which is welded with its flange on both sides by fillet welds 4 on the carrier belt and holes 3 are provided in the projecting web at close intervals.
  • T-profiles can be of advantage if the profile is deformed along the weld seams, e.g. B. can arise from punching holes, should be avoided.
  • the plate reinforcement is placed on the protruding web of the T-profile from above, so it does not engage in the holes.
  • the concrete slab is anchored to the belt by means of the dowel effect of the concrete in the perforated area by simple thin reinforcement bars 8 which are hooked into a part of the holes and perforated bars are used.
  • FIG. 4 again shows a profile bar 2 with a rectangular cross-section.
  • the large holes 3 which can be round or rectangular
  • smaller additional holes 9 are arranged.
  • bars 5 for example the reinforcement bars of the transverse plate reinforcement
  • the bond is made on the one hand - through the concrete dowels in the hole area, on the other hand through hook-like reinforcing bars that encompass the transverse reinforcement of the slab.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Laminated Bodies (AREA)

Abstract

The sectional bars (2) are welded to the girder chord (1) in the longitudinal direction and engage into the concrete of the slab (6). The parts of the sectional bars (2) generally projecting at right angles from the girder chord (1) are provided with continuous holes (3) at narrow intervals. The concrete passing through the holes (3) in a dowel-like manner makes two-shear shear connections between the concrete slab (6) and sectional bar (2), via which shearing forces can be transmitted in any direction in the girder plane. This prevents the concrete slab from being lifted off, so that, in principle, no special loops or dowels are needed for the tension-resistant connection between the girder chord (2) and concrete slab (6). The effect of the horizontal concrete dowels can be increased by means of bolts and/or reinforcing bars (5) which are inserted through the holes (3). <IMAGE>

Description

Verbundmittel zur Übertragung von Kräften zwischen Stahlträger und Betonplatte bei Verbundtragwerken, die aus stählernen, in Längsrichtung auf den Gurt des Trägers aufgeschweissten Profilstäben bestehen und in den Beton der Platte eingreifen sind bekannt.Composite means for transmitting forces between the steel girder and the concrete slab in the case of composite girder structures which consist of steel profile bars welded in the longitudinal direction onto the belt of the girder and which engage in the concrete of the slab are known.

Bekannt sind z.B. Verbundmittel aus Flachstäben mit Rechteck-Querschnitt, die auf einer Seite mit Querrippen in engen Abständen versehen sind und mit der anderen, glatten Seite auf dem Gurt des Stahlträgers aufliegen und mit diesem durch Kehlnähte verbunden sind.For example, Compound material made of flat bars with a rectangular cross-section, which are closely spaced on one side with transverse ribs and rest on the belt of the steel girder with the other, smooth side and are connected to this by fillet welds.

Bekannt ist auch, bei Flachstäben anstelle der Querrippen Löcher in engen Abständen anzuordnen.It is also known to arrange holes at flat intervals instead of the transverse ribs in flat bars.

In beiden Fällen wird durch den aufgeschweissten Flachstab eine Verzahnung in der Kontaktfläche zwischen Betonplatte und Stahlgurt hergestellt, durch die Scherkräfte in Trägerlängsrichtung übertragen werden können. Zur Obertragung von rechtwinklig hierzu verlaufenden, die Platte abhebenden Kräften werden zusätzlich in Richtung der Plattendicke verlaufende Bewehrungsschlaufen oder Kopfbolzendübel benötigt, die auf dem Gurt bzw. dem Flachstab angeschweisst und in der Betonplatte verankert sind.In both cases, the welded flat bar creates a toothing in the contact surface between the concrete slab and the steel belt, through which shear forces can be transmitted in the longitudinal direction of the beam. For the transmission of forces at right angles to this, lifting off the slab, reinforcement loops or headed dowels running in the direction of the slab thickness are additionally required, which are welded onto the belt or flat bar and anchored in the concrete slab.

Diese Schlaufen oder Bolzen sind beim Transport der Stahlträger oft hinderlich oder setzen - wenn sie erst auf der Baustelle angeschweisst werden - hierfür besondere Massnahmen voraus, die sich preislich ungünstig auswirken.These loops or bolts are often a hindrance when transporting the steel girders or - if they are only welded on at the construction site - require special measures that have an unfavorable price.

Aus diesem Grunde wurde schon vorgeschlagen, Stäbe mit U-Querschnitt zu verwenden, diese mit ihren beiden Flanschenden durch Kehlnähte an den Trägergurt anzuschliessen und den Steg des U-Querschnittes mit Löchern in engen Abständen zu versehen. In diese Löcher können an der Baustelle in den statisch erforderlichen Abständen von oben her bügelartige Bewehrungselemente gesteckt werden, die mit verdickten Enden versehen sind und nach dem Betonieren in dem vom U-Profil umschlossenen Betonkern verankert sind.For this reason, it has already been proposed to use rods with a U cross section, to connect them with their two flange ends to the support belt by fillet welds, and to provide the web of the U cross section with holes at close spacings. In these holes, at the construction site, stirrup-like reinforcement elements can be inserted from above at the statically required intervals, which are provided with thickened ends and, after concreting, are anchored in the concrete core enclosed by the U-profile.

In entsprechender Weise können auch Kopfbolzen.-Dübel verankert werden.Head bolts can also be anchored in a corresponding manner.

Die Ubertragung der Scherkraft erfolgt hier durch Verzahnung, wobei die Betonzähne von oben in die Steglöcher des U-Profils eingreifen. Vorteilhaft ist hier im Vergleich zum gelochten Flachstahlprofil, dass sich auch grössere Zuschlagkörner .im Lochbereich mittig vor den U-Steg setzen können, wodurch die Scherfestigkeit in der horizontalen Abscherfläche in Oberkante U-Steg erhöht wird.The transmission of the shear force takes place here by means of teeth, the concrete teeth engaging in the web holes of the U-profile from above. Compared to the perforated flat steel profile, it is advantageous here that there are also larger aggregate grains . in the center of the hole in front of the U-bar, which increases the shear strength in the horizontal shear surface in the upper edge of the U-bar.

Obwohl bei dieser Lösung die Dübel bzw. Schlaufen ohne Schweissung und auf einfache Weise erst an der Baustelle eingebaut werden können, so setzt sie doch besonders ausgebildete, d.h. mit Verdickungen versehene Bewehrungselemente voraus. Weiter werden die zwischen den Löchern stehengebliebenen Stegteile des U-Profils durch die Verankerung der Dübel bzw. Schlaufen in vertikaler Richtung auf Biegung beansprucht, was örtlich zu grösseren Lochabständen führt.. Darüberhinaus muss sichergestellt sein, dass beim Betonieren der Platte der durch das U-Profil umschlossene Hohlraum einwandfrei mit Beton verfüllt ist. Hier wirkt sich nachteilig aus, dass sich im Hohlraum leicht Schmutz oder Wasser ansammeln kann, was die Herstellung einer einwandfreien Betonqualität in diesem hoch beanspruchten Bereich erschwert. ( Das gleiche gilt natürlich auch für den Beton im Lochbereich des Flachstabes ).Although with this solution the dowels or loops can only be installed at the construction site without welding and in a simple manner, they are still used by specially trained, i.e. reinforcement elements provided with thickened sections. Furthermore, the web parts of the U-profile that remain between the holes are subjected to bending in the vertical direction due to the anchoring of the dowels or loops, which locally leads to larger hole spacings. Furthermore, it must be ensured that when concreting the slab the Profile enclosed cavity is properly filled with concrete. The disadvantage here is that dirt or water can easily accumulate in the cavity, which makes it difficult to produce perfect concrete quality in this highly stressed area. (The same naturally also applies to the concrete in the perforated area of the flat bar).

Berücksichtigt man noch die durch das gelochte U-Profil gegenüber dem gelochten Flachstab bedingten Material-Mehrkosten, so ist durch diese Lösung keine wesentlich ins Gewicht fallende Einsparung zu erzielen.If one also takes into account the additional material costs caused by the perforated U-profile compared to the perforated flat bar, this solution does not result in any significant savings.

Der Erfindung liegt daher die Aufgabe zugrunde, die Verankerung der Betonplatte ohne besondere Schlaufen oder Dübel zu erreichen und die Tragfähigkeit der Profilstäbe als Verbundmittel zu erhöhen und sie damit in wirtschaftlicher und in konstruktiver Hinsicht besser auszunutzen.The invention is therefore based on the object to achieve the anchoring of the concrete slab without special loops or dowels and to increase the load-bearing capacity of the profiled bars as a compound and thus to make better use of them in economic and constructive terms.

Die Lösung besteht darin, dass die vom Trägergurt im allgemeinen rechtwinkelig abstehenden Querschnittsteile der Profilstäbe mit durchgehenden Löchern in engen Abständen versehen sind,deren lichte Weite grösser als der Durchmesser des Grösstkornes des Betons ist und dass somit durch den Beton im Lochbereich in horizontaler Richtung zweischnittige, dübelartige Verbindungen zwischen Betonplatte und Profilstab ausgebildet sind. Anstelle der bisher waagrechten Scherflächen zwischen Beton und Profilstab bzw. Trägergurt verlaufen die Scherflächen also lotrecht. Damit können bei gleichem Lochquerschnitt und durchgehenden Löchern doppelt so hohe Scherkräfte übertragen werden, da die dübelartigen Verbindungen zwischen Betonplatte und Profilstab zweischnittig ausgenutzt werden können.The solution consists in that the cross-sectional parts of the profiled bars which generally protrude at right angles from the carrier belt are provided with through holes at close intervals, the clear width of which is greater than the diameter of the largest grain of the concrete and that thus two-section, dowel-like connections between the concrete slab and profile bar are formed by the concrete in the hole area in the horizontal direction. Instead of the previously horizontal shear surfaces between the concrete and the profile bar or carrier belt, the shear surfaces run perpendicular. This means that shear forces that are twice as high can be transmitted with the same hole cross-section and through holes, since the dowel-like connections between the concrete slab and profile bar can be used in two sections.

Durch die im allgemeinen lotrecht stehenden, mit Löchern versehenen Querschnittsteile ist darüberhinaus die Ansammlung von Schmutz oder Wasser im Lochbereich vermieden und die Herstellung eines einwandfreien Betons an dieser Stelle sichergestellt.The generally perpendicular, perforated cross-sectional parts also prevent the accumulation of dirt or water in the perforated area and ensure the production of perfect concrete at this point.

. Ein ganz wesentlicher Vorteil der erfindungsgemässen Ausbildung bzw. Anordnung der Profilstäbe besteht jedoch darin, dass über den die Löcher im Profilstab dübelartig durchsetzenden Beton Scherkräfte in beliebiger Richtung übertragen werden können, d.h. also auch rechtwinklig zur Ebene der Gurtfläche so dass damit von vornherein ein Abheben der Betonplatte vom Stahlgurt verhindert wird.. A very significant advantage of the design or arrangement of the profiled bars according to the invention, however, is that shear forces can be transmitted in any direction via the concrete which penetrates through the holes in the profiled bar in a dowel manner, i.e. So also at right angles to the level of the belt surface so that the concrete slab is prevented from lifting from the steel belt from the outset.

Es sind damit keine Schlaufen oder Dübel zur zugfesten Verbindung zwischen Stahlgurt und Betonplatte erforderlich, sofern die Zug- bzw. Scherfestigkeit des Betons im Lochbereich nicht überschritten wird.No loops or dowels are required for the tensile connection between the steel belt and the concrete slab, provided the tensile or shear strength of the concrete in the hole area is not exceeded.

Darüberhinaus besteht die Möglichkeit, die quer zur Trägerspannrichtung verlaufende untere Plattenbewehrung ganz oder teilweise durch die Löcher hindurch zu führen und damit die Wirkung der horizontalen Betondübel wesentlich zu erhöhen.In addition, there is the possibility of leading the lower plate reinforcement running transversely to the beam tensioning direction completely or partially through the holes and thus significantly increasing the effect of the horizontal concrete dowels.

Weiter kann mit Hilfe von dicken stählernen Bolzen, die durch einzelne Löcher hindurch gesteckt sind, die Kraftübertragung zwischen Gurt und Platte im Lochbereich praktisch unbegrenzt vergrössert werden. Damit ergibt sich auch die Möglichkeit, die untere Plattenquerbewehrung von oben auf die Profilstäbe aufzulegen und sich damit der jeweils erforderlichen Betondeckung der Platte ausserhalb des Stahlgurtes anzupassen.Furthermore, with the help of thick steel bolts that are inserted through individual holes, the force transmission between the belt and the plate in the hole area can be increased practically indefinitely. This also makes it possible to place the lower transverse reinforcement on the profile bars from above and thus to adapt to the required concrete cover of the slab outside the steel belt.

Die verschiedenen Ausbildungsformen der Profilleisten und die damit verbundenen konstruktiven Möglichkeiten zur Herstellung des Verbundes zwischen Stahlträger und Betonplatte werden in den folgenden Figuren 1 bis 4 beispielhaft erläutert. Hier sind jeweils Vertikalschnitte durch den Verbundbereich rechtwinklig zur Trägerspannweite bzw. bei Figur 1 b und 4 b auch in Richtung der Trägerspannweite dargestellt.The various design forms of the profile strips and the associated design options for producing the bond between the steel girder and the concrete slab are explained by way of example in the following FIGS. 1 to 4. Vertical sections through the bonded area at right angles to the beam span or in the case of FIGS. 1b and 4b also in the direction of the beam span are shown here.

Fig. 1 zeigt einen Profilstab 2 mit Rechteck-Querschnitt, der mit seiner Schmalseite durch 2 Kehlnähte 4 in Längsrichtung auf den Trägergurt 1 aufgeschweisst ist. Der Profilstab 2 (Flachstab) weist in seinem vom Gurt abstehenden Querschnittsteil Löcher 3 in engen Abständen auf,wie aus Fig. 1 b hervorgeht.Fig. 1 shows a profile bar 2 with a rectangular cross-section, which is welded with its narrow side by 2 fillet welds 4 in the longitudinal direction on the carrier belt 1. The profile bar 2 (flat bar) has holes 3 in its cross-sectional part projecting from the belt at close intervals, as can be seen from FIG. 1b.

Durch einige dieser Löcher sind Stäbe der unteren Querbewehrung der Stahlbetonplatte 6 hindurchgesteckt, wodurch die Tragfähigkeit des . Dübels wesentlich erhöht wird.Through some of these holes, the bars of the lower transverse reinforcement of the reinforced concrete plate 6 are inserted, whereby the load-bearing capacity of the. Dowel is significantly increased.

In Fig. 2 ist auf den Trägergurt 1 ein U-Profil mit vom Gurt abstehenden Flanschen 7 mit Hilfe der beiden Kehlnähte 4 angeschweisst. In beiden Flanschen 7 sind Löcher 3 in engen Abständen angebracht. Man erhält damit eine vieischnittige Verdübelung zwischen Betonplatte und Trägergurt. Durch einige der einander gegenüberliegende Löcher sind bügelartige Bewehrungsstäbe 8 hindurchgesteckt, die in der Stahlplatte 6 verankert sind. Es können aber auch, wie gestrichelt eingezeichnet ist, kurze Stahlbolzen 5 durch die Löcher hindurch gesteckt werden, die den ganzen Lochquerschnitt ausfüllen und in die in Längsrichtung verlaufende bügelartige Bewehrungsstäbe eingehängt werden können.In Fig. 2, a U-profile with flanges 7 projecting from the belt is welded onto the carrier belt 1 with the aid of the two fillet welds 4. Holes 3 are made in close spacing in both flanges 7. A multi-section dowel is thus obtained between the concrete slab and the carrier belt. Through some of the holes opposite each other bow-like reinforcement bars 8 are inserted, which are anchored in the steel plate 6. However, as shown in dashed lines, short steel bolts 5 can also be inserted through the holes, which fill the entire hole cross section and can be hooked into the stirrup-like reinforcing bars running in the longitudinal direction.

In Fig. 3 ist als Profilstab ein T-Querschnitt dargestellt, der mit seinem Flansch beidseitig durch Kehlnähte 4 auf den Trägergurt aufgeschweisst ist und in dessen abstehenden Steg Löcher 3 in engen Abständen vorgesehen sind. T-Profile können von Vorteil sein, wenn Verformungen des Profils längs der Schweissnähte, die z. B. durch das Stanzen von Löchern entstehen können, vermieden werden sollen.In Fig. 3 a T-section is shown as a profile bar, which is welded with its flange on both sides by fillet welds 4 on the carrier belt and holes 3 are provided in the projecting web at close intervals. T-profiles can be of advantage if the profile is deformed along the weld seams, e.g. B. can arise from punching holes, should be avoided.

Die Plattenbewehrung ist von oben auf den abstehenden Steg des T-Profils aufgelegt, greift also in die Löcher nicht ein. Die Verankerung der Betonplatte mit dem Gurt erfolgt ausser durch die Dübelwirkung des Betons im Lochbereich durch einfache, in einen Teil der Löcher eingehängte beiderseits mit Haken versehene, dünne Bewehrungsstäbe 8. In entsprechender Weise können natürlich auch I-Profile oder T-Profile mit obenliegendem Flansch und jeweils gelochten Stegen verwendet werden.The plate reinforcement is placed on the protruding web of the T-profile from above, so it does not engage in the holes. The concrete slab is anchored to the belt by means of the dowel effect of the concrete in the perforated area by simple thin reinforcement bars 8 which are hooked into a part of the holes and perforated bars are used.

In Fig. 4 ist nochmals ein Profilstab 2 mit Rechteck-Querschnitt dargestellt. Wie im Längsschnitt Fig. 4 b zu erkennen sind ausser den grossen Löchern 3 die rund oder auch rechteckig sein können, kleinere Zusatzlöcher 9 angeordnet. Durch diese kleineren Löcher können Stäbe 5, z.B. die Bewehrungsstäbe der Plattenquerbewehrung hindurchgeschoben und in der für die Betondeckung erforderlichen Höhenlage gehaltenwerden. Der Verbund erfolgt auch hier wieder einerseits - durch die Betondübel im Lochbereich, andererseits durch hakenartige Bewehrungsstäbe, die die Querbewehrung der Platte umfassen.4 again shows a profile bar 2 with a rectangular cross-section. As can be seen in the longitudinal section in FIG. 4 b, in addition to the large holes 3, which can be round or rectangular, smaller additional holes 9 are arranged. Through these smaller holes, bars 5, for example the reinforcement bars of the transverse plate reinforcement, can be pushed through and held at the height required for the concrete cover. Here, too, the bond is made on the one hand - through the concrete dowels in the hole area, on the other hand through hook-like reinforcing bars that encompass the transverse reinforcement of the slab.

Die wirtschaftlichen und konstruktiven Vorteile von Profilstäben als Verbundmittel in den hier dargestellten, erfindungsgemässen Anwendungsbeispielen liegen auf der Hand. Es können durch die zweischnittigen dübelartigen Verbindungen Verbundkräfte in beliebigen, in der Trägerebene liegenden Richtungen übertragen werden. Durch die sowieso vorhandene Querbewehrung der Platte wird die Verdübelungswirkung im Lochbereich der Stege erheblich vergrössert. Zusätzliche Verankerungen der Platte am Gurt sind, wenn überhaupt erforderlich, durch im Betonbau übliche Haken oder Bügel ohne Schweissverbindungen möglich. Das Einbringen des Betons in den Lochbereich bringt keinerlei Probleme. Hinzu kommt, dass die erfindungsgemässe Lösung zur Obertragung der Verbundkräfte allen Anforderungen hinsichtlich der Duktilität im Bruchzustand durch Variation der Lochgrössen und Lochabstände gerecht wird.The economic and constructive advantages of profile bars as composite means in the application examples according to the invention shown here are obvious. Thanks to the two-section dowel-like connections, composite forces can be transmitted in any direction lying in the beam plane. Due to the existing transverse reinforcement of the slab, the dowelling effect in the hole area of the webs is considerably increased. Additional anchorings of the plate to the belt are possible, if necessary at all, by means of hooks or brackets, which are common in concrete construction, without welded connections. Introducing the concrete into the hole area does not cause any problems. In addition, the solution according to the invention for transferring the composite forces meets all requirements with regard to ductility in the fracture state by varying the hole sizes and hole spacing.

Claims (4)

1. Verbundmittel aus stählernen Profilstäben für Verbundtragwerke zur Übertragung von in Trägerebene beliebig gerichteten Kräften zwischen Stahlträger und Betonplatte, die in Längsrichtung auf den Trägergurt aufgeschweisst sind und in den Beton der Platte eingreifen, dadurch gekennzeichnet, dass die vom Trägergurt im allgemeinen rechtwinkelig abstehenden Querschnittsteile der Profilstäbe mit durchgehenden Löchern in engen Abständen versehen sind, deren lichte Weite grösser als der Durchmesser des Grösstkornes des Betons ist, und dass somit durch den Beton im Lochbereich zweischnittige , dübelartige Verbindungen zwischen Betonplatte und Profilstab ausgebildet sind.1. Compound of steel profile bars for composite structures for the transmission of forces in the plane of the beam between the steel beam and the concrete slab, which are welded to the beam in the longitudinal direction and engage in the concrete of the slab, characterized in that the cross-sectional parts of the beam that protrude generally at right angles Profile bars are provided with through holes at close intervals, the clear width of which is larger than the diameter of the largest grain of the concrete, and that thus two-section, dowel-like connections between the concrete slab and profile bar are formed by the concrete in the hole area. 2. Verbundmittel nach Anspruch 1, dadurch gekennzeichnet, dass durch einen Teil der Löcher und/oder durch in grösseren Abständen und/oder mit kleineren Lichtweiten zusätzlich angeordnete Löcher Bewehrungsstäbe, Haken, Dollen oder dergleichen hindurchgesteckt sind, die den Lochquerschnitt ganz oder teilweise ausfüllen.2. Compound according to claim 1, characterized in that reinforcement bars, hooks, oarlocks or the like are inserted through part of the holes and / or through holes additionally arranged at larger distances and / or with smaller light widths, which completely or partially fill the hole cross section. 3. Verbundmittel nach Anspruch 1, dadurch gekennzeichnet, dass ein Teil der Löcher konisch hergestellt ist und dass durch diese Löcher entsprechend konische Dübel hindurchgesteckt sind.3. Compound according to claim 1, characterized in that a part of the holes is made conical and that corresponding conical dowels are inserted through these holes. 4. Verbundmittel nach Anspruch 1, dadurch gekennzeichnet, dass mehrere Profilstäbe nebeneinander in Längsrichtung auf den Gurt aufgeschweisst sind.4. Compound according to claim 1, characterized in that a plurality of profile bars are welded side by side in the longitudinal direction on the belt.
EP85111721A 1985-09-17 1985-09-17 Connecting means for a composite concrete supporting construction Expired - Lifetime EP0215148B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT85111721T ATE59685T1 (en) 1985-09-17 1985-09-17 JOINTS FOR REINFORCED CONCRETE COMPOSITE STRUCTURES.
DE8585111721T DE3581080D1 (en) 1985-09-17 1985-09-17 COMPOSITES FOR REINFORCED CONCRETE STRUCTURES.
EP85111721A EP0215148B1 (en) 1985-09-17 1985-09-17 Connecting means for a composite concrete supporting construction

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EP85111721A EP0215148B1 (en) 1985-09-17 1985-09-17 Connecting means for a composite concrete supporting construction

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EP0215148B1 EP0215148B1 (en) 1991-01-02

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0345620A2 (en) * 1988-06-07 1989-12-13 Hans-Peter Dr.-Ing. Andrä Concrete beam with t-beam form
EP0369914A1 (en) * 1988-11-16 1990-05-23 Centre D'etudes Techniques De L'equipement De L'est Method for joining a matrix material to a functional support, and devices manufactured according to this method
FR2736667A1 (en) * 1995-07-13 1997-01-17 Est Centre Tech Equip DEVICE FOR CONNECTING THE CORE OF A METAL PROFILE TO CONCRETE IN A MIXED CONSTRUCTION
EP0826848A2 (en) * 1996-08-29 1998-03-04 Richard Prof. Dr.-Ing. Rojek Device for the concentrated introduction of forces into concrete
WO2020061663A1 (en) * 2018-09-27 2020-04-02 Prates Aguiar Otavio Steel component spiralled along a helical reinforcement bar for forming mixed connections and elements

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20070384A (en) * 2007-05-16 2008-11-17 Rautaruukki Oyj The composite beam structure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1922340A (en) * 1930-09-22 1933-08-15 Leonie S Young Concrete construction
DE821215C (en) * 1949-12-13 1951-11-15 Bergbau Und Huettenbedarf Ag F Shear protection for composite beams
US3736716A (en) * 1970-04-11 1973-06-05 Long Span Bridge Consultants I Means for reducing slippage of steel beam relative to concrete slab

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1922340A (en) * 1930-09-22 1933-08-15 Leonie S Young Concrete construction
DE821215C (en) * 1949-12-13 1951-11-15 Bergbau Und Huettenbedarf Ag F Shear protection for composite beams
US3736716A (en) * 1970-04-11 1973-06-05 Long Span Bridge Consultants I Means for reducing slippage of steel beam relative to concrete slab

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0345620A2 (en) * 1988-06-07 1989-12-13 Hans-Peter Dr.-Ing. Andrä Concrete beam with t-beam form
EP0345620A3 (en) * 1988-06-07 1991-12-27 Hans-Peter Dr.-Ing. Andrä Concrete beam with t-beam form
EP0369914A1 (en) * 1988-11-16 1990-05-23 Centre D'etudes Techniques De L'equipement De L'est Method for joining a matrix material to a functional support, and devices manufactured according to this method
WO1990005818A1 (en) * 1988-11-16 1990-05-31 Centre D'etudes Techniques De L'equipement De L'est Method for making integral a mass of material with a functional support, and devices thus obtained
FR2736667A1 (en) * 1995-07-13 1997-01-17 Est Centre Tech Equip DEVICE FOR CONNECTING THE CORE OF A METAL PROFILE TO CONCRETE IN A MIXED CONSTRUCTION
WO1997003260A1 (en) * 1995-07-13 1997-01-30 Centre D'etudes Techniques De L'equipement De L'est Device for joining the web of a metal section to concrete in a composite construction
EP0826848A2 (en) * 1996-08-29 1998-03-04 Richard Prof. Dr.-Ing. Rojek Device for the concentrated introduction of forces into concrete
EP0826848A3 (en) * 1996-08-29 1999-04-21 Richard Prof. Dr.-Ing. Rojek Device for the concentrated introduction of forces into concrete
WO2020061663A1 (en) * 2018-09-27 2020-04-02 Prates Aguiar Otavio Steel component spiralled along a helical reinforcement bar for forming mixed connections and elements

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DE3581080D1 (en) 1991-02-07
EP0215148B1 (en) 1991-01-02
ATE59685T1 (en) 1991-01-15

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