EP0433224B1 - Zusammengesetztes Tragelement - Google Patents

Zusammengesetztes Tragelement Download PDF

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Publication number
EP0433224B1
EP0433224B1 EP90810917A EP90810917A EP0433224B1 EP 0433224 B1 EP0433224 B1 EP 0433224B1 EP 90810917 A EP90810917 A EP 90810917A EP 90810917 A EP90810917 A EP 90810917A EP 0433224 B1 EP0433224 B1 EP 0433224B1
Authority
EP
European Patent Office
Prior art keywords
support element
elements
individual
individual elements
concrete
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90810917A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0433224A1 (de
Inventor
Julius Prof. Natterer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Priority to AT90810917T priority Critical patent/ATE88780T1/de
Publication of EP0433224A1 publication Critical patent/EP0433224A1/de
Application granted granted Critical
Publication of EP0433224B1 publication Critical patent/EP0433224B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—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
    • 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
    • E04B2005/232—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with special provisions for connecting wooden stiffening ribs or other wooden beam-like formations to the concrete slab
    • E04B2005/237—Separate connecting elements

Definitions

  • the invention relates to a composite support element according to the preamble of claim 1.
  • Reinforced concrete elements are often used as a supporting element in the building industry, for example for ceiling constructions, bridges or for other supporting structures. A considerable amount of concrete is used, which does not have a load-bearing function, but only the function of corrosion protection for the internal steel elements. In contrast, when using composite support elements with the same rigidity, often lighter constructions can be realized and further advantages can be achieved.
  • a composite support element consists of at least two individual elements. The individual elements forming such a composite supporting element can be, for example, a concrete slab and wooden beams or wooden beams interacting with this concrete slab.
  • Such a composite load-bearing element that is subjected to bending is generally used in such a way that the concrete beam absorbs the compressive forces and the wooden beam absorbs the tensile forces.
  • This typical division of functions for such a composite construction has the result that shear forces occur between the individual elements of the composite supporting element.
  • These thrust forces must be transferred using suitable lanyards. This can be done, for example, using dowels that are concreted into the concrete beam on the one hand and that pass through the wooden beam on the other hand, for example, to be braced on the side of the wooden beam via a thread. For one A large number of dowels are required to transmit the shear forces acting transversely to the joint. If the shear forces are not transmitted in a force-fitting manner, however, the dowels are loaded in the transverse direction, which can lead to loosening and thus a loss of rigidity.
  • angled anchoring is carried out, i.e. the dowels are arranged at an angle.
  • a large number of dowels are also required here, but angled dowels are also susceptible to loosening.
  • positive connections between the supporting individual elements are also known, as is described, for example, in French patent application 2,568,610.
  • both of the aforementioned connections have the disadvantage that the shrinkage that occurs in the concrete and in the belt plate or wooden element in any case can lead to a loosening of the positive connection, which in turn results in a considerable loss of rigidity of the assembled support element.
  • the present invention is therefore based on the object of creating a composite support element in which the transmission means between the individual elements are designed in such a way that the disadvantages occurring in the known designs of such support elements are avoided.
  • a support element is to be created which is easy to manufacture, that is to say requires a few dowels or other clamping means, and its high level even in the event of shrinkage in wood and / or in concrete Maintains rigidity.
  • the type of toothing carried out between the individual elements of the assembled support element in connection with a compressive force acting perpendicular to the support axis enables a prestressed positive connection.
  • the shear forces are deflected in the direction perpendicular to the flanks present between the individual elements.
  • the prestressing of the positive connection has the effect that the rigidity of the assembled support element is maintained even in the event of shrinkage occurring in the supporting individual elements.
  • FIG. 1 shows an overview drawing of a composite support element according to the invention.
  • the support element is composed of the individual elements 1, 2.
  • the first individual element 1 is designed in the form of a number of wooden beams and the second individual element 2 in the form of a plate-shaped concrete element.
  • the composite support element shown can be, for example, a ceiling construction used in construction.
  • formwork boards 3 can also be seen, which are fastened with the aid of squared timbers 4 in relation to the first supporting element 1 in order to be able to insert the concrete slab 2.
  • the composite supporting element shown is stressed by the inherent weight of the concrete slab 2 and the loads thereon on bending.
  • the support element 2 located above has the task of absorbing the compressive stresses which occur, while the lower support element 1 is the tensile stresses which occur as a result of the bending load records.
  • Such a composite construction has the advantage that the concrete element 2 is only loaded under pressure and no precautions have to be taken in the concrete for absorbing tensile stresses.
  • shear forces occurring between the individual elements must be transmitted in the joint 6. This transfer of the thrust forces takes place by a positive connection in such a way that a toothing 7 is provided between the individual elements 1, 2.
  • Fig. 2 shows a longitudinal section along the line A-A of the composite support member shown in Fig. 1.
  • the active surfaces 8, 9 of the individual elements 1, 2 are formed into a tooth profile.
  • serrations 7 are arranged at some distance from each other.
  • the active surface 8 of the first support element 1, which in the example described here is made of wood, is in each case designed with a notch-shaped depression, for example a cutout, at the corresponding points.
  • the concrete is introduced, which forms the supporting individual element after the setting.
  • the concrete fills in the depressions 10 present in the first individual element and forms tooth-shaped elevations 11 that are complementary to the depressions 10.
  • FIG. 2 force vectors 12, 13, 14 are additionally entered in order to illustrate the mode of action of the toothing of the active surfaces 8, 9.
  • the shear force 12 acting between the individual elements is broken down at the toothing into a force component 13 directed perpendicular to the tooth flank and into a component 14 directed parallel to the respective tooth flank.
  • the force component 14 directed parallel to the tooth flank causes the individual element 2 to be lifted. Consequently, a compressive force acting between the support elements 1, 2 is required which counteracts this lift.
  • the required amount of this pressure force depends on the dimensioning, load and design of the assembled support element. If the individual element 2 consists of concrete, that is to say has a relatively high dead weight, the required compressive force between the individual elements can already be applied by this dead weight. At higher loads or when the upper individual element is too light, it is necessary to provide clamping elements between the individual elements.
  • Such a clamping element is shown in Fig. 3 on an enlarged scale.
  • the clamping element is represented by a threaded bolt 15, the head 15a of which is supported on the individual element 2 via a washer 16 and which is separated from the concrete of the element 2 by means of a sleeve 17.
  • a sleeve 17 Such a separation is necessary to ensure that the force is applied in the vertical direction.
  • the clamping element On the opposite side, that is to say on the individual element 1, the clamping element is continuous and is supported by a nut 18 on the counter surface 19 of the individual element 2.
  • other designs of the clamping element are also possible. So can instead of a bolt head 15a, which protrudes upward from the support element 2, the clamping element can also be concreted.
  • the part of the clamping element interacting with the support element 1 is glued into a bore in the support element 1.
  • the clamping element is subjected to tension and thus prevents lifting of the supporting element 2 from the supporting element 1. This can occur in particular when high individual loads act on one side on the composite supporting element.
  • the transmission means are prestressed between the individual elements.
  • Means for generating a pretension can be, for example, the nut 18 shown in FIG. 3 together with the thread of the bolt.
  • the bolt 15 is prestressed by tightening the nut 18. Because of this compressive force, force components act in the oblique flanks of the toothing 7, even in the unloaded state, which are opposed to the force components which act on the tooth flank when the support element is loaded and are designated 13 and 14 in FIG. 2. In this way, an increased stiffness of the support element according to the invention is achieved in the loaded state.
  • the clamping element can also be tensioned against elastic tensioning means, for example a plate spring assembly 20.
  • elastic tensioning means for example a plate spring assembly 20.
  • the elastic element can also on the opposite side 19, i.e. be arranged on the side of the individual element 1.
  • the elastic element can be designed in the form of disc springs, spring springs or other elastic means. It is also possible to use swelling agents which are arranged in the concrete and which expand after the absorption of moisture from the concrete, via which expansion a prestressing force is applied to the clamping element.
  • the active surface 8 of the individual element 1 is formed at some distance from a fillet 21, that is to say a recess with rounded flanks.
  • the positive connection is generated via this fillet and the complementarily shaped elevation 22 on the other individual element 1.
  • the active surface 8 of the wooden support 1 interacting with the concrete slab 2 is worked out to form a wave profile 23.
  • the clamping elements which are designed for example in the form of a bolt 15, are each in the Troughs 24 of the individual element 1 arranged.
  • the distances between the clamping elements depend on the design and load of the support element. However, it is generally smaller than the number of profile shafts and in any case significantly smaller than the number of clamping elements to be provided in conventional composite girders.
  • the inventive design of the transmission means of a composite support element it is possible with the inventive design of the transmission means of a composite support element to reduce the number of clamping means by 40 to 60%.
  • the number of clamping elements to be used which are always to be positioned in the lowest point of the profiles arranged in the lower support element 1, can be determined.
  • the composite support element according to the invention can also consist of two beam-shaped elements, for example made of wood, as a composite carrier, which are designed with teeth and associated clamping elements on the active surfaces between the individual elements.
  • the assembled support element consists of two plate-shaped individual elements, the transmission means according to the invention for transmitting the thrust forces being designed as a pair of slide rails arranged between the plates.
  • Fig. 7 explains an embodiment of the composite support element according to the invention, in which such a slide bar is provided.
  • the first support element 1 is here as a wooden beam and the second support element as a concrete slab executed.
  • the carrier is shown before the concrete is placed.
  • the wooden beam 1 is connected to a slide bar 25.
  • This connection can, for example, be nailed, glued, or the like. be.
  • the slide bar 25 is connected to the formwork boards 3.
  • Other embodiments are also possible for attaching the formwork boards 3.
  • the formwork boards can also be connected to the wooden support 1.
  • the slide bar 25 is provided with a wave profile 26 on its upper side, ie on the active surface 8 interacting with the second, overhead support element.
  • clamping elements can be designed in a non-tensioned or also in a tensioned version. For this purpose there are bores 27 at some distance from each other in the base of a shaft of the wave profile 26 of the slide bar 25. Clamping elements (not shown) project through these bores 27, which are concreted in the second individual element or protrude through the individual element 2. In this case, the clamping elements can be pretensioned on the opposite side, for example via a thread.
  • FIG. 8 Another embodiment of the composite support element according to the invention is shown in FIG. 8.
  • the support element is in turn made up of two individual elements 1, 2 composed. These individual elements are made of wood, for example, but other embodiments of profiles and supports are also possible.
  • the active surfaces of the individual elements are separated from one another by spacers 28.
  • the intermediate pieces 28 are each arranged on the outer tooth flank pointing away from the center of the support 29.
  • the spacers can be designed as plates made of soft metal, wood or plastic.
  • a vertical force component acts in each of the individual elements, ie. a tensile stress is generated in the upper individual element 2 and a compressive stress is generated in the lower individual element 1.
  • a tensile stress is generated in the upper individual element 2
  • a compressive stress is generated in the lower individual element 1.
  • an increase 31 of the support element in the prestressed state is required if a support element is to have a straight, non-curved shape after application of a base load.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Sliding-Contact Bearings (AREA)
EP90810917A 1989-12-04 1990-11-27 Zusammengesetztes Tragelement Expired - Lifetime EP0433224B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90810917T ATE88780T1 (de) 1989-12-04 1990-11-27 Zusammengesetztes tragelement.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4334/89A CH678959A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1989-12-04 1989-12-04
CH4334/89 1989-12-04

Publications (2)

Publication Number Publication Date
EP0433224A1 EP0433224A1 (de) 1991-06-19
EP0433224B1 true EP0433224B1 (de) 1993-04-28

Family

ID=4274153

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810917A Expired - Lifetime EP0433224B1 (de) 1989-12-04 1990-11-27 Zusammengesetztes Tragelement

Country Status (7)

Country Link
US (1) US5125200A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0433224B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE88780T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA2031447C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH678959A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE59001310D1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FI (1) FI92949C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (19)

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Publication number Priority date Publication date Assignee Title
US5634308A (en) * 1992-11-05 1997-06-03 Doolan; Terence F. Module combined girder and deck construction
CH687397A5 (fr) 1992-11-14 1996-11-29 Bettex Fabienne Plancher mixte bois-beton.
DE59609785D1 (de) * 1995-01-11 2002-11-14 Richard Kuettel Verbundelement für holz-beton-verbundtragwerke
US5605423A (en) * 1996-04-26 1997-02-25 Elco Textron, In. Self-drilling stud
FR2780427B1 (fr) * 1998-06-30 2002-09-06 Georges Deperraz Poutre mixte bois-beton pour la construction et l'ouvrage d'art
ITBO20030046A1 (it) * 2003-02-03 2004-08-04 Coperlegno Srl Elementi prefabbricati per la realizzazione di solai pavimenti
DE102004001638A1 (de) 2004-01-10 2005-08-11 Fritz, Bruno O., Dipl.-Ing. (FH) Verfahren zur Herstellung eines Verbundelementes
WO2006018908A1 (ja) * 2004-08-18 2006-02-23 Taisei Corporation せん断力補強構造及びせん断力補強部材
WO2007079739A2 (de) * 2006-01-13 2007-07-19 Bathon, Leander Bauwerk aus einzelbauteilen
DE202006000593U1 (de) 2006-01-13 2006-05-18 Bathon, Leander, Prof. Dr. Bauwerke in Holz-Beton-Verbundbauweise
US8215075B2 (en) * 2008-03-18 2012-07-10 Awi Licensing Company Up-tight surface covering and attachment system
AT511220B1 (de) * 2011-04-08 2013-01-15 Cree Gmbh Deckenelement zur ausbildung von gebäudedecken
JP6010430B2 (ja) * 2012-11-12 2016-10-19 株式会社竹中工務店 床構造
JP6373975B2 (ja) 2013-05-06 2018-08-15 ユニバーシティー・オブ・カンタベリーＵｎｉｖｅｒｓｉｔｙ Ｏｆ Ｃａｎｔｅｒｂｕｒｙ プレストレスト梁又はパネル、およびプレストレスト梁又はパネルを製造する方法
JP6316020B2 (ja) * 2014-02-19 2018-04-25 Ｊｆｅ建材株式会社 合成床構造
PL3201405T3 (pl) * 2014-09-30 2023-07-17 UNIVERSITé LAVAL Układ zintegrowany, jego element złączny i sposób jego wytwarzania
US20180347191A1 (en) * 2017-06-01 2018-12-06 9360-4742 Quebec Inc. Prefabricated concrete slab floor and method of fabricating the same
JP7499195B2 (ja) 2021-02-02 2024-06-13 住友林業株式会社 梁床接合構造
EP4339387A1 (de) * 2022-09-16 2024-03-20 Hans-Ulrich Terkl Schraubenaufnahme und verfahren zur lösbaren befestigung eines betonelementes an einer trägerkonstruktion

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DE546445C (de) * 1932-03-12 Otto Schaub Holzbetonverbundkoerper
DE196613C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *
FR667419A (fr) * 1928-01-19 1929-10-16 Liaison exempte de glissement entre armature en bois et béton dans les constructions en béton à armature en bois
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CH223498A (de) * 1941-06-11 1942-09-30 Piccolin Stefano Tragkonstruktion.
GB784383A (en) * 1955-03-01 1957-10-09 Crompton Parkinson Ltd Improvements relating to composite structural members
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FR2611778B1 (fr) * 1987-02-26 1992-04-24 Paris Ouest Entreprise Plancher a collaboration bois-beton

Also Published As

Publication number Publication date
CH678959A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1991-11-29
CA2031447A1 (en) 1991-06-05
FI905881A0 (fi) 1990-11-29
FI905881L (fi) 1991-06-05
EP0433224A1 (de) 1991-06-19
CA2031447C (en) 1999-04-06
US5125200A (en) 1992-06-30
FI92949C (fi) 1995-01-25
FI92949B (fi) 1994-10-14
DE59001310D1 (de) 1993-06-03
ATE88780T1 (de) 1993-05-15

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