EP2072706B1 - Decke bestehend aus Balken und Deckeneinschüben sowie aus einer nahtlos gegossenen Deckenplatte auf diesen Balken und Deckeneinschüben - Google Patents

Decke bestehend aus Balken und Deckeneinschüben sowie aus einer nahtlos gegossenen Deckenplatte auf diesen Balken und Deckeneinschüben Download PDF

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Publication number
EP2072706B1
EP2072706B1 EP08291184.3A EP08291184A EP2072706B1 EP 2072706 B1 EP2072706 B1 EP 2072706B1 EP 08291184 A EP08291184 A EP 08291184A EP 2072706 B1 EP2072706 B1 EP 2072706B1
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European Patent Office
Prior art keywords
face
floor
rib
keying
millimetres
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EP08291184.3A
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English (en)
French (fr)
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EP2072706A1 (de
Inventor
Thierry Haour
Jean-Paul Py
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KP1 SAS
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KP1 SAS
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    • 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
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/26—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with filling members between the beams
    • E04B5/261—Monolithic filling members

Definitions

  • the invention relates to a floor comprising concrete beams and formwork interjoists interposed between these beams having their edges resting on these beams, and a seamless casting compression slab on the beams and interjoists, each interjoists comprising two formwork portions defining with each beam cavities extending along these beams, the concrete contained in each cavity forming a keyway of the slab solidarisant this slab to the beam, each formwork portion having in cross section a bow shape of concavity turned towards the top delimiting the entire lower face of the keying, each beam comprising an upper face and two flanks at least partially embedded by the keyings of the compression slab.
  • the beams are installed, then interjoists between each pair of adjacent beams, before pouring concrete on the assembly to form the compression slab.
  • the flexural rigidity of such a floor is conditioned by the quality of the cohesion between the beams and the slab they support. This cohesion is considered satisfactory when the shear strength of the connection between the beam and the slab, parallel to the beam, is greater than a threshold value defined by regulation according to the configuration of the floor.
  • This resistance can be evaluated by exerting on the beam a longitudinal thrust force tending to extract it from the slab, up to the value of effort causing the decohesion of the beam and the slab. The shear strength is then deduced from this value and the geometric parameters of the beam.
  • the whole formed by the beam and the slab portion it carries is a rigidly secured whole.
  • the moment of inertia of this set is then high because it corresponds to the moment of inertia of the section that define together the beam and the slab portion, which gives the floor a high flexural rigidity.
  • the beam dissociates from the slab so that the moment of inertia of this set then corresponds only to the sum of the moment of inertia of the section of the beam and that of the section of the slab portion.
  • the moment of inertia of an element depends on its high cubic height, the sum of the moments of inertia of the beam and the portion of slab is much lower than the moment of inertia of the beam and the slab considered as a whole.
  • This shear strength can be provided by seams, that is to say by providing irons protruding from the upper faces of each beam, and which are embedded in the compression slab.
  • the shear resistance is obtained by providing keyings located at the lower face of the slab, which encircle the flanks of the beam to increase the shear strength of the junction of the beam with the slab.
  • It comprises a beam 1 having a symmetrical section with respect to a vertical median plane of symmetry PM, and having the shape of the inverted letter T. It comprises a sole 2 of rectangular section and a core 3 having a dovetail-shaped section which protrudes from an upper face of this sole 2.
  • the soul is delimited by a flat upper surface 4, extended by two sides 6 and 7 planes joining this upper face 4 to the sole 2. Each side is inclined relative to the median plane PM, an angle marked by 5 to form an edge marked by 8.
  • This floor also includes a interjoists partially represented in figure 1 it is marked by 9. It has a lower edge 10, bearing on a lateral upper face of the sole 2 and which runs along the lateral face 7 of the core 3, and a central arched portion 11 connected to this edge lower by an intermediate wall 12 of hollow form.
  • Each keyway runs along an upper portion of the core 4 while bearing on a side thereof.
  • the shape of the cross section of a keyway depends on the hollow intermediate wall 12 of the interlock form that delimits its underside.
  • the dovetail-section web must have sidewalls 6 and 7 inclined by an angle of at least six percent, and this web must have a height such that each sidewall 6, 7 forms an overhang 8 of at least four millimeters, considering the inclination to six percent.
  • This outline comprises a long base 14 of one hundred millimeters extending the upper face 4, a short base 16 of thirty millimeters, and a side 17 of forty millimeters joining these bases and skirting the flank 7.
  • the beam is pinched by the keyways over a relatively large height to improve the longitudinal shear strength of the junction.
  • this beam is concrete its surface has asperities, so that there is at the interface of the beam and the slab of the attachment forces that improve the shear strength of the assembly.
  • FR 2 323 835 describes a floor with the features of the preamble of claim 1.
  • the object of the invention is to provide a solution for reducing the cross section of the keyways to reduce the volume of concrete needed to cast the compression slab.
  • the subject of the invention is a floor according to the features of claim 1.
  • This specific profile of the beam flanks optimizes the distribution of the forces applied by this beam to the slab during a stress in longitudinal shear.
  • the cross section of the keyway can then be reduced without affecting the longitudinal shear strength of the connection of the beam with the slab.
  • each rib has in cross section a contour containing a rectangle having a small side parallel to the upper face and measuring at least four millimeters and a large side measuring at minus five millimeters.
  • each keyway has a lower face delimited in cross section by a lower arc inscribed in a trapezium having a large base of one hundred millimeters parallel to the upper face, a a small base of thirty millimeters, as well as a side of forty millimeters joining these bases, the junction of said side with the great base being situated on a lateral face of the rib.
  • the invention also relates to a floor as defined above, characterized in that the lower arc delimiting the lower face of the keyway has an arc shape of an ellipse centered on a lateral face of the rib and having its major axis oriented in a direction normal to this main face.
  • the invention also relates to a floor as defined above, characterized in that the base ellipse of the lower arc has a half-major axis measuring at least sixty millimeters and a half-small axis measuring forty millimeters.
  • the invention also relates to a floor as defined above, characterized in that each beam has its outer surface provided with asperities and / or reliefs.
  • the invention also relates to a floor as defined above, characterized in that each key rib has a so-called upper face extending in the extension of the upper face of the beam.
  • the invention also relates to a floor as defined above, characterized in that each rib has a so-called lower face oriented obliquely with respect to the main face from which it protrudes.
  • the invention also relates to a floor as defined above, characterized in that each keyway has reinforcements distributed at regular intervals along the beam, each reinforcement having a cross section extending beyond the lower arc.
  • the floor according to the invention which is represented in figure 2 comprises a beam 1 having an inverted T-section, which is symmetrical with respect to a vertical median plane PM, and a formwork interjoists and unrepresented compression slab which is cast on the seamless assembly.
  • the beam comprises a sole 21 of rectangular section, and a core 22 protruding from an upper face of this sole.
  • the core is delimited by a flat upper face 23, and by two sides 24 and 26 extending this upper face and extending generally parallel to the plane PM.
  • the flank 24 comprises a main face 27 plane and parallel to the plane PM, and a rib 28 also called key extending parallel to the general direction of the beam, and protruding laterally from the main face 27 being located in the area of the main face 27 which is closest to the upper face 23.
  • This rib is delimited by the upper face 23 in the upper part, as well as by a lateral face 29, and by an oblique face 31 joining this lateral face 29 to the main face 27.
  • the side face 29 extends perpendicular to the upper face 23, that is to say parallel to the plane PM, while the oblique face is inclined relative to this plane PM.
  • the junction between the upper face 23 and the lateral face 29 corresponds to an upper edge of the beam, indicated by 32.
  • the thickness of the rib denoted 33 and corresponding to the distance separating the lateral face 29 from the main face 27 in a direction normal to the plane PM, is between four and six millimeters.
  • This other rib 37 is also delimited in the upper part by the upper face 23, laterally by a lateral face 38 parallel to the plane PM, and in the lower part by an oblique face 39.
  • the junction of the upper face 23 with the lateral face 38 corresponds to an upper edge of the beam marked by 41.
  • This rib 37 has the same shape and the same dimensions as the rib 28.
  • the shuttering interlocking which is partially represented in figure 2 being identified by 42 comprises a lower edge 43 resting on a lateral upper face of the sole 21, and along the main face 36 of the sidewall 26.
  • This lower edge 43 is connected to a central vaulted portion of the interjoists, marked 44, by a hollow intermediate wall 46, the central portion 44 and the intermediate wall having opposite curvatures. So when the interjoists are in place as in the figure 2 its arched central portion 44 has its hollow face facing downwards while the intermediate wall 46 has its hollow face facing upwards.
  • the assembly formed by interjoists and beams delimits a lower surface on which is cast seamlessly compression slab not shown.
  • the intermediate wall 46 constitutes a formwork hollow portion of the interjoists whose hollow upper surface delimits a lower face of a keyway of this compression slab.
  • This keying extends to the key 37, so that the three outer faces of the key are coated by the keyway and the compression slab.
  • the keying is therefore delimited on the side of the beam by a portion of the main face 36 and the rib 37.
  • the lower face of this keying is itself delimited by the hollow or curved intermediate wall 46.
  • This curved intermediate wall 46 has a section in the form of an elliptical arc indicated by 47, corresponding to the lower right quarter of a base ellipse centered on the edge at a point marked by 40.
  • This point 40 is located on the lateral face 38 of the rib 37, being spaced from the lower edge of this lateral face by a distance marked by 34, and which is between five and twenty-five millimeters, preferably ten millimeters.
  • the semi-major axis of this ellipse is oriented horizontally and measures sixty millimeters, and its half-small axis, which is oriented vertically, measures forty millimeters.
  • the keying therefore has an outline, marked by 48 in the figure 2 , comprising a side 49 formed of three consecutive segments, a rectilinear upper side 51 extending parallel to the upper face 23, and a lower edge 47 in the shape of an elliptical arc.
  • the upper edge 51 is not physically embodied, since it corresponds to the junction of the slab body with the keying, the assembly being cast in a single operation.
  • the keying thus has a generally rectilinear shape with a cross section delimited by the contour 48, this form being given by the interjoists and the flank of girder.
  • the concrete beam has its outer surface advantageously provided with asperities or reliefs, which further increases the longitudinal shear strength of the junction.
  • the interjoists are provided to complete this basic form, for example every one hundred and fifty millimeters along the beam, by a transverse reinforcement, having a cross section significantly greater than the section defined by the contour 48.
  • the interjoists is advantageously made of molded plastic to form in it regularly spaced channels and extending perpendicular to the direction of the beam, to mold and delimit these reinforcements.
  • Such a channel located behind the cutting plane of the figure 2 is represented in it by the line 52 corresponding to the underside of this channel.
  • the beam has an upper portion that extends into the compression slab, that is to say beyond the lower face of the compression slab.
  • the invention is not limited to this floor structure, and it applies equally well to a structure in which the upper face of the beam is at a level which coincides with the level of the lower face of the compression slab .

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Floor Finish (AREA)
  • Road Paving Structures (AREA)

Claims (9)

  1. Decke, umfassend Betonträger (19) und Schalungseinschübe (42), die zwischen diesen Trägern (19) angeordnet sind, indem ihre Ränder (43) an diesen Trägern (19) anliegen, sowie eine nahtlos gegossene Druckbetonplatte auf den Trägern (19) und den Einschüben (42), wobei jeder Einschub (42) zwei Schalungsabschnitte (46) umfasst, die mit jedem Träger (19) Hohlräume definieren, die sich entlang dieser Träger (19) erstrecken, wobei der in jedem Hohlraum enthaltene Beton eine Keilverbindung für die Platte bildet, die diese Platte mit dem Träger (19) verbindet, wobei jeder Schalungsabschnitt (46) einen Querschnitt in Form eines Bogens mit einer nach oben gerichteten Konkavität hat, der die gesamte untere Fläche der Keilverbindung begrenzt, wobei jeder Träger (19) eine obere Fläche (23) sowie zwei Flanken (24, 26) umfasst, die zumindest teilweise von den Keilverbindungen der Druckbetonplatte umhüllt sind, dadurch gekennzeichnet, dass die Flanken (24, 26) jedes Trägers (19) zueinander parallele Hauptflächen (27, 36) aufweisen, und dass jede Flanke (24, 26) mit einer Längsrippe (28, 37) versehen ist, die einen Schlussstein bildet, der über ihre Hauptfläche (27, 36) hinausragt, wobei die den Schlussstein bildende Rippe (28, 37) von der Keilverbindung und der Druckbetonplatte eingehüllt ist.
  2. Decke nach Anspruch 1, dadurch gekennzeichnet, dass jede Rippe (28, 37) im Querschnitt eine Kontur aufweist, die ein Rechteck enthält, das eine kleine Seite hat, die parallel zur oberen Fläche ist und mindestens vier Millimeter misst, sowie eine große Seite, die mindestens fünf Millimeter misst.
  3. Decke nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass jede Keilverbindung eine untere Fläche aufweist, die im Querschnitt von einem unteren Bogen (47) begrenzt ist, der in ein Trapez (13) einbeschrieben ist, das eine große Basis (14) von 100 Millimetern hat, die parallel zur oberen Fläche (23) ist, eine kleine Basis (16) von 30 Millimetern, sowie eine Seite (17) von 40 Millimetern, die diese Basen (14, 16) verbindet, wobei sich die Verbindung der genannten Seite mit der großen Basis (14) auf einer Seitenfläche (29, 38) der Rippe (28, 37) befindet.
  4. Decke nach Anspruch 3, dadurch gekennzeichnet, dass der untere Bogen (47), der die untere Fläche der Keilverbindung begrenzt, eine Form eines Bogens einer Ellipse hat, die auf eine Seitenfläche (29, 38) der Rippe (28, 37) zentriert und deren große Achse in einer zu dieser Hauptfläche (27, 36) senkrechten Richtung ausgerichtet ist.
  5. Decke nach Anspruch 4, dadurch gekennzeichnet, dass die Grundellipse des unteren Bogens (47) eine große Halbachse hat, die mindestens sechzig Millimeter misst, sowie eine kleine Halbachse, die vierzig Millimeter misst.
  6. Decke nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeder Träger (19) an seiner Außenfläche mit Unebenheiten und/oder Erhebungen versehen ist.
  7. Decke nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jede einen Schlussstein bildende Rippe (28, 37) eine sogenannte obere Fläche aufweist, die sich in der Verlängerung der oberen Fläche (23) des Trägers erstreckt.
  8. Decke nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jede Rippe (28, 37) eine sogenannte untere Fläche (31, 39) umfasst, die in Bezug auf die Hauptfläche (27, 36), von der sie absteht, schräg ausgerichtet ist.
  9. Decke nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass jede Keilverbindung Verstärkungen aufweist, die in regelmäßigen Abständen entlang des Trägers verteilt sind, wobei jede Verstärkung einen Querschnitt hat, der sich über den unteren Bogen (47) hinaus erstreckt.
EP08291184.3A 2007-12-20 2008-12-15 Decke bestehend aus Balken und Deckeneinschüben sowie aus einer nahtlos gegossenen Deckenplatte auf diesen Balken und Deckeneinschüben Active EP2072706B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08291184T PL2072706T3 (pl) 2007-12-20 2008-12-15 Strop zawierający belki i wypełnienia jak również płyta wylewana bez szwu na tych belkach i wypełnieniach

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0708938A FR2925544B1 (fr) 2007-12-20 2007-12-20 Plancher comprenant des poutres et des entrevous ainsi q'une dalle coulee sans couture sur ces poutres et entrevous.

Publications (2)

Publication Number Publication Date
EP2072706A1 EP2072706A1 (de) 2009-06-24
EP2072706B1 true EP2072706B1 (de) 2015-07-29

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Application Number Title Priority Date Filing Date
EP08291184.3A Active EP2072706B1 (de) 2007-12-20 2008-12-15 Decke bestehend aus Balken und Deckeneinschüben sowie aus einer nahtlos gegossenen Deckenplatte auf diesen Balken und Deckeneinschüben

Country Status (5)

Country Link
EP (1) EP2072706B1 (de)
ES (1) ES2550156T3 (de)
FR (1) FR2925544B1 (de)
PL (1) PL2072706T3 (de)
PT (1) PT2072706E (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102251674A (zh) * 2011-06-05 2011-11-23 山东宁建建设集团有限公司 超长混凝土结构跳仓式无缝施工方法
CN102758437A (zh) * 2012-07-27 2012-10-31 上海建工集团股份有限公司 圆形基坑超大体积混凝土中心向四周放射状浇筑施工方法
FR3047757B1 (fr) * 2016-02-12 2020-12-04 Lesage Dev Rupteur thermique, entrevous isolant associe et plancher isolant obtenu

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1143740A (fr) * 1956-02-06 1957-10-04 élément préfabriqué pour la construction
FR1164226A (fr) * 1956-04-04 1958-10-07 Plancher
FR1203983A (fr) * 1958-08-01 1960-01-22 Prod Ind Sa Plancher à éléments préfabriqués
FR1216154A (fr) * 1959-02-10 1960-04-22 éléments de planchers préfabriqués et planchers construits avec ces éléments
FR2323835A1 (fr) * 1975-09-09 1977-04-08 Tech Tuiles Briques Centre Perfectionnements aux planchers a poutrelles et entrevous pour ameliorer leur isolation acoustique
NL7806703A (en) * 1978-06-21 1979-12-28 Bredero Nv U=shaped foam components in ground floor structure - locate with upright legs on shaped piece extending from foot flange underside
FR2472063A2 (fr) * 1979-12-20 1981-06-26 Saret Plancher-plafond
ES2161199B1 (es) * 2000-05-16 2002-07-01 Sanchez Jaime Enrique Jimenez Procedimiento de fabricacion de placa alveolar ligera materializada en obra, placa asi obtenida y su aplicacion en viviendas.
FR2829780B1 (fr) * 2001-09-18 2004-11-05 B D I Sas Entrevous isolant a hautes performances pour la construction de planchers

Also Published As

Publication number Publication date
EP2072706A1 (de) 2009-06-24
PL2072706T3 (pl) 2015-12-31
FR2925544B1 (fr) 2010-01-08
FR2925544A1 (fr) 2009-06-26
ES2550156T3 (es) 2015-11-04
PT2072706E (pt) 2015-11-04

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