WO1994026996A1 - Bewehrungsdübel für betonplatten - Google Patents
Bewehrungsdübel für betonplatten Download PDFInfo
- Publication number
- WO1994026996A1 WO1994026996A1 PCT/EP1994/001232 EP9401232W WO9426996A1 WO 1994026996 A1 WO1994026996 A1 WO 1994026996A1 EP 9401232 W EP9401232 W EP 9401232W WO 9426996 A1 WO9426996 A1 WO 9426996A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dowel
- reinforcement
- shaft
- reinforcing
- head
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0645—Shear reinforcements, e.g. shearheads for floor slabs
Definitions
- the invention relates to a reinforcement plug as shear reinforcement for concrete slabs, in particular reinforced concrete flat slabs, with a plug shaft, which is provided with a plug head at at least one end.
- Reinforcement anchors of this type are used both as individual shear reinforcement elements and as dowel strips (DE-PS 27 27 159) used for shear reinforcement in flat slabs and similarly stressed concrete slabs.
- the reinforcement anchors are arranged perpendicular to the slab plane and absorb the shear forces that occur in the area of connected supports and run perpendicular to the slab plane.
- the reinforcement dowels are provided at least at one end of the dowel shaft with a dowel head which is widened like a mushroom in relation to the shaft cross section and which introduces the tensile force occurring in the dowel shaft into the surrounding concrete.
- the other end of the dowel shank - when used as individual reinforcement elements - can also be provided with such a dowel head or - when used in a dowel bar - connected to a reinforcement bar extending at right angles to the longitudinal direction of the shank.
- the length of these reinforcing dowels must be adapted to the thickness of the concrete slab. On the one hand, the thickness of the concrete slab should be used as far as possible to absorb the shear forces introduced from the reinforcing dowels; on the other hand, sufficient concrete cover at the dowel ends must be ensured. Therefore, the known one-piece reinforcement dowels must be provided in the length specified for each application. This either requires extensive storage of reinforcement anchors of different lengths or a separate production for each individual application.
- An adjustment of the dowel length is not possible on the construction site because machines are required for upsetting the dowel heads, which are only available in the manufacturing company, and because high quality requirements are placed on a welded connection of the dowel shaft with a reinforcement bar, which are also not on the construction site, but can only be reliably observed in the manufacturing company.
- the object of the invention is therefore to design a reinforcement plug of the type mentioned in such a way that length adjustment is also possible on site with simple measures.
- the dowel shaft consists of two separate shaft parts, which partially overlap each other, and that the two shaft parts each have a widened dowel head at their ends facing each other.
- the reinforcement anchor is made in two parts. Its two shaft parts can be telescopically moved against each other, so that the desired dowel length can be adjusted continuously. If the two-part Reinforcing dowels are concreted in this position, the surrounding concrete in the overlap area of the two shank parts takes over the transmission of the tensile force occurring in the dowel shaft in that a pressure strut builds up in the concrete between the two dowel heads.
- the reinforcing dowel according to the invention can be adjusted prior to installation in the direction in which the greatest load occurs after installation, namely in the longitudinal direction of the sheep, the embedding in the surrounding concrete produces a force fit in this load direction, which is used to accommodate the largest occurring Load is suitable.
- This frictional connection between the two dowel parts which can initially be moved relative to one another, takes place without mechanical non-positive connection of the two dowel parts and without special additional measures.
- the basic task of a reinforcement element in a reinforced concrete part is to absorb those forces that cannot be absorbed by the concrete alone
- the positive connection between the two dowel parts takes place again through the concrete, in a type of load for which the concrete is particularly suitable, namely a pressure load.
- a mutual alignment of the two shaft parts is achieved in an embodiment of the invention in that each of the two dowel heads has a respective edge receiving the other shaft part.
- Each of the two Dowel heads are centered on the other shaft part, so that a mutual alignment of the two shaft parts is ensured when they are held together in their overlap area. This can preferably be done by connection by means of a clamping device which, according to a simple and advantageous embodiment, is at least one tubular wire loop.
- the dowel head preferably encompasses the shaft part accommodated in the edge recess by more than 180 °. It is then possible to achieve the mutual connection of the two dowel parts solely through the sections of the dowel head that encompass the adjacent shaft part. For example, the dowel head can engage around the shaft part accommodated in the edge recess. The connection of the two shaft parts can then be made in a simple manner in that the two shaft parts snap into the edge recess of the other dowel head after setting the respectively desired dowel length and are thereby fixed.
- spacers can also be inserted in the overlap area between the two shaft parts.
- 1 is a side view of a reinforcement plug as shear reinforcement of a concrete slab
- 2 shows a section along the line II-II in FIG. 1
- FIG. 3 is a side view similar to FIG. 1, a modified embodiment of a reinforcement anchor with spacers in the overlap area between the two shaft parts,
- FIG. 5 shows a further embodiment of a reinforcement anchor in a side view
- FIG. 7 shows a further embodiment of a reinforcement anchor in a side view
- FIG. 8 shows a section along the line VIII-VIII through one of the two shaft parts shown in FIG. 7,
- Fig. 10 shows the reinforcement plug shown in Fig. 9 in a view in the direction X and
- Fig. 11 is a partial section through a reinforced concrete flat slab in the area of a column with an anchor strip used there, which has several reinforcement anchors of the type described above.
- the reinforcement plug 1 shown in a side view in FIG. 1 is used as a shear reinforcement element in a concrete slab 2, for example a reinforced concrete flat slab.
- the dowel shaft of the reinforcement anchor 1 consists of two separate sheep parts 3 and 4, which at The illustrated embodiment is designed as a cylindrical steel rod. Both shaft parts 3, 4 are provided at their respective outer ends with a plate-shaped or mushroom-shaped plug head 5.
- the two shaft parts 3, 4 partially overlap one another and lie parallel next to one another in the overlap region.
- the shaft parts 3, 4 each have a dowel head 6, 7 which is widened with respect to the shaft cross section and which is essentially as plate-shaped or mushroom-shaped as the dowel heads 5 at the other end.
- the dowel heads 5, 6 and 7 each have a flat truncated cone shape on their side facing the shaft part 3 or 4.
- the two dowel heads 6, 7 are each provided with an edge recess 8 or 9, which receives the other shaft part 4 or 3, as can be seen particularly clearly from FIG. 2.
- the edge recesses 8, 9 are designed in the shape of a circular arc and encompass the shaft parts 4 and 3 by less than 180 °.
- the two shaft parts 3, 4 are connected to one another by a wire wire loop 10 acting as a clamping device.
- the overlap length of the two shank parts 3, 4 was chosen so that the desired overall length of the reinforcement dowel 1 results.
- the reinforcement plug 1 is concreted in.
- the reinforcing dowel 1 is subjected to a tensile load between the two dowel heads 6, 7, the surrounding concrete forms a pressure strut 11 indicated in FIG. 1, by means of which the tensile forces acting in the longitudinal direction are transmitted between the two shaft parts 3, 4.
- FIGS. 3 and 4 differs from the example according to FIGS. 1 and 2 essentially in that the anchor heads 6, 7 have no edge recess at the overlapping ends of the shaft parts 3, 4, but the anchor heads 5 completely the same.
- two spacers 12 are inserted in the overlapping area, each of which has two opposite notches 13 (FIG. 4) in which the two shaft parts 3, 4 lie.
- FIG. 3 it is shown that the two sheep parts 3, 4 can be held together, for example by two wire loops 10 in the desired position.
- the two dowel heads 6 'and T - which are embodied here as short plates, engage the shaft part 4 or 3 accommodated in their edge recess 8' or 9 '.
- the edge recess 9 ' (the edge recess 8' is designed in the same way)
- the edge recess 9 'of the dowel head 7' has a narrow point 14, the inside width of which is less than the shaft diameter of the shaft part 3 to be received or 4.
- the distance between the inner edge 9a of the edge recess 9 'and this constriction 14 is greater than the shaft diameter.
- the shaft part 3 engages in the edge recess 9 'when it is pressed over the shaft part 3.
- the clear width of the edge recesses 8 'and 9' is preferably chosen so that even after the connection of the two shaft parts 3, 4, a clamping effect between the edge recesses 8 'and 9' on the one hand and the shaft parts 4 and 3 received on the other hand. As a result, the two shaft parts 3, 4 are non-positively held in the predetermined mutual orientation even during concreting.
- the embodiment according to FIGS. 7 and 8 differs from the previously described exemplary embodiments in that the edge recess 9 ′′ (and in the same way also the edge recess 8 ′′) is cut out approximately triangularly from the dowel head 7.
- the two recesses lying on both sides of the edge recess Sections 15 of the dowel head 7 forming the constriction 14 can be flipped open as flanks from the starting position shown in Fig. 8 in order to receive the shaft part 3 or 4.
- These sections 15 of the dowel head 7 can be deformed into a position in which they are received Grip and hold shaft part 3 or 4 by more than 180 ° Similar to the example shown in FIGS. 5 and 6, there is no need for a separate clamping device.
- FIGS. 9 and 10 show the use of a reinforcement anchor 1, for example in the embodiment according to FIGS. 1 and 2, in a reinforced concrete flat ceiling 2.
- the upper shank part 3 of the reinforcement dowel 1 is welded to a cross bar 18, which is on adjacent reinforcement bars of the upper reinforcement mat
- FIG. 11 shows in a partial step a reinforced concrete flat ceiling 2, which is supported by a Bo support 19.
- a plurality of dowel strips 20 are arranged in the form of a beam, each of which consists of a plurality of spaced, identical reinforcement dowels 1 of the previously described embodiments and a reinforcement strip 21 which extends at right angles to the longitudinal direction of the shaft and which has one end 22 in the Prop 19 protrudes.
- One lower shank part 4 of each reinforcement plug 1 is welded to the reinforcement bar 21 at its lower end.
- the reinforcement bar 21 is located directly under a lower reinforcement mat 17.
- the upper dowel heads 5 protrude into the area of an upper reinforcement mat 16 of the reinforced concrete flat slab 2.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6524856A JPH08510303A (ja) | 1993-05-12 | 1994-04-21 | コンクリートスラブのための補強ダウエル |
EP94915074A EP0698161A1 (de) | 1993-05-12 | 1994-04-21 | Bewehrungsdübel für betonplatten |
AU66462/94A AU6646294A (en) | 1993-05-12 | 1994-04-21 | Reinforcing dowel for concrete slabs |
NO953374A NO953374L (no) | 1993-05-12 | 1995-08-28 | Armeringsplugg for betongplater |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19934315900 DE4315900C1 (de) | 1993-05-12 | 1993-05-12 | Bewehrungsdübel für Betonplatten |
DEP4315900.1 | 1993-05-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994026996A1 true WO1994026996A1 (de) | 1994-11-24 |
Family
ID=6487937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1994/001232 WO1994026996A1 (de) | 1993-05-12 | 1994-04-21 | Bewehrungsdübel für betonplatten |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0698161A1 (de) |
JP (1) | JPH08510303A (de) |
AU (1) | AU6646294A (de) |
CA (1) | CA2148834A1 (de) |
DE (1) | DE4315900C1 (de) |
NO (1) | NO953374L (de) |
WO (1) | WO1994026996A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE59504223D1 (de) * | 1995-05-11 | 1998-12-17 | Halfen Gmbh & Co Kg | Vorrichtung zur Bildung einer Schubbewehrung für Flachdecken |
DE10312701B4 (de) * | 2003-03-21 | 2007-10-31 | Krummel, Gerhard, Dipl.-Ing. | Anordnung zur Fixierung eines Ankerbolzens einer Stütze in einem Fundament |
CN104718332B (zh) * | 2012-09-05 | 2017-03-08 | 韩国建设技术研究院 | 抗冲切用增强构件以及施工方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1440751A (fr) * | 1965-04-20 | 1966-06-03 | Fischer & Co Fa | Dispositif d'armature pour les constructions en béton |
US4362423A (en) * | 1980-09-08 | 1982-12-07 | Williams Form Engineering Corporation | Coupling for coil-thread rebar |
DE3331275A1 (de) * | 1983-08-30 | 1985-03-14 | Gleit- Und Lagertechnik Nell Gmbh, 5620 Velbert | Schubbewehrungselement |
DE3411591C1 (de) * | 1984-03-29 | 1985-06-13 | Hochtief Ag Vorm. Gebr. Helfmann, 4300 Essen | Schubbewehrungselement fuer Stahlbetonkonstruktionen |
DE3515894A1 (de) * | 1985-05-03 | 1986-11-06 | Jan Dipl.-Ing. 7032 Sindelfingen Smitka | Stabfoermiger und durchbiegbarer bewehrungsabstandhalter fuer stahlbetonwaende und fertigteile im bauwesen |
WO1990015257A1 (en) * | 1989-06-09 | 1990-12-13 | Balach David M | Reinforcing bar coupling device |
DE4129903A1 (de) * | 1991-09-09 | 1993-03-11 | Deha Ankersysteme | Duebelleiste |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2727159C3 (de) * | 1977-06-16 | 1980-05-08 | 7000 Stuttgart | Schubbewehrung für auf Betonstützen aufgelagerte Flachdecken aus Stahl- oder Spannbeton |
-
1993
- 1993-05-12 DE DE19934315900 patent/DE4315900C1/de not_active Expired - Fee Related
-
1994
- 1994-04-21 EP EP94915074A patent/EP0698161A1/de not_active Withdrawn
- 1994-04-21 WO PCT/EP1994/001232 patent/WO1994026996A1/de not_active Application Discontinuation
- 1994-04-21 AU AU66462/94A patent/AU6646294A/en not_active Abandoned
- 1994-04-21 JP JP6524856A patent/JPH08510303A/ja active Pending
- 1994-04-21 CA CA 2148834 patent/CA2148834A1/en not_active Abandoned
-
1995
- 1995-08-28 NO NO953374A patent/NO953374L/no unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1440751A (fr) * | 1965-04-20 | 1966-06-03 | Fischer & Co Fa | Dispositif d'armature pour les constructions en béton |
US4362423A (en) * | 1980-09-08 | 1982-12-07 | Williams Form Engineering Corporation | Coupling for coil-thread rebar |
DE3331275A1 (de) * | 1983-08-30 | 1985-03-14 | Gleit- Und Lagertechnik Nell Gmbh, 5620 Velbert | Schubbewehrungselement |
DE3411591C1 (de) * | 1984-03-29 | 1985-06-13 | Hochtief Ag Vorm. Gebr. Helfmann, 4300 Essen | Schubbewehrungselement fuer Stahlbetonkonstruktionen |
DE3515894A1 (de) * | 1985-05-03 | 1986-11-06 | Jan Dipl.-Ing. 7032 Sindelfingen Smitka | Stabfoermiger und durchbiegbarer bewehrungsabstandhalter fuer stahlbetonwaende und fertigteile im bauwesen |
WO1990015257A1 (en) * | 1989-06-09 | 1990-12-13 | Balach David M | Reinforcing bar coupling device |
DE4129903A1 (de) * | 1991-09-09 | 1993-03-11 | Deha Ankersysteme | Duebelleiste |
Also Published As
Publication number | Publication date |
---|---|
NO953374L (no) | 1995-11-13 |
EP0698161A1 (de) | 1996-02-28 |
DE4315900C1 (de) | 1994-07-21 |
CA2148834A1 (en) | 1994-11-24 |
JPH08510303A (ja) | 1996-10-29 |
AU6646294A (en) | 1994-12-12 |
NO953374D0 (no) | 1995-08-28 |
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