CA2148834A1 - Reinforcing dowel for concrete plates - Google Patents
Reinforcing dowel for concrete platesInfo
- Publication number
- CA2148834A1 CA2148834A1 CA 2148834 CA2148834A CA2148834A1 CA 2148834 A1 CA2148834 A1 CA 2148834A1 CA 2148834 CA2148834 CA 2148834 CA 2148834 A CA2148834 A CA 2148834A CA 2148834 A1 CA2148834 A1 CA 2148834A1
- Authority
- CA
- Canada
- Prior art keywords
- dowel
- shank
- reinforcing
- sections
- head
- 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.)
- Abandoned
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
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
(51) Abstract A reinforcing dowel (I) useful as a bent-up bar for concrete slabs (2), in particular for reinforced concrete flat roofs, has two separate shafts (3, 4) which partially overlap each other ant which bear each a dowel bead (6, 7) at their overlapping ends. The tensile force is transmitted between both shafts (3, 4) in the longitudinal direction of the dowel by a diagonal strut (11) formed between the two dowel heads (6, 7) in the surrounding concrete. The desired total length of the reinforcing dowel (1) may be predetermined by changing the length of overlapping between the two shafts (3, 4).
Description
^ 21~8834 . .
ILIE. ~I THIS ~i~-~ -T~ TRANSLATION
Reinforcing Dowel for Concrete Plates The invention relates to a reinforcing dowel as a bent-up bar for concrete plates, in particular reinforced concrete slabs w~owel shank which is provided with a dowel head on at least one .,. . ~
end.
Reinforcing dowels of this kind are inserted æ individual bent-up reinîorcing elements and drawn together to the dowel strips for use as bent-up bars in slabs and similarly used concrete plates.
The reir~orcing dowels are arranged perpendicular to the plate plane and bear the transverse load that rui~s perpendicular to the plate plane, in particular in the area of the attached supports. For this purpose, the reinforcing dowels are provided with a dowel head on at least one end of the dowel shank, which is mushroom-shaped and enlarged in contrast to the diameter of the shank ~ :
and which transfers the tensile load that occurs in the dowel shank into the surrounding concrete.
The other end of the dowel shank - when used as a single reinforcing element - can be provided with such a dowel head or - when used in a dowel strip - can be connected with a reinforcing strip that extends at a right angle to the length of the shank.
The length of this reinforcing dowel must be adjusted to the thickness of the concrete plate to be held. On one hand the thickness ofthe concrete plate should be used as much as possible to absorb the tensile fiorces introduced from the reinforcing dowels; on the other hand a sufficient concrete overlap on the dowel ends must be provided. Therefore the known one-piece reinforc~ng dowel must be provided a~ the length required in each application. This makes either an extensive inventory of different length reinforcing dowels or a special manufilcture fo~r each : :
individual application necessary. An adjustment ofthe dowel length is not possible at the construction site because machines, which are only available in the factory, are necessary for ~e :
''';';'~
'"'-'',-'.
21~8834 -2 - PCT/EP94/01232 ~ -driving the dowel heads, and because high quality requirements are placed on the welded connections of the dowel shank with a reinforcing strip, which can not be maintained acceptably at the construction site, but rather only in the factory.
The task of the invention is to develop a rein~orcing dowel of the type described in the beginning so that an adjustment of the length is possible with simple means at the construction site.
This problem is solved in the invention in that the dowel shank consists of two separate shank sections, which overlap one another partially, and that both of the shank sections have a dowel head on the ends facing one another that is enlarged in contrast to the diameter of the shank.
The reinforcing dowel is therefore designed as two pieces. Both of its shank sections can be telescoped together so that the dowel length desired in each case can be adjusted infinitely. When the two-part reinforcing dowel is concreted into this position, the surrounding concrete in the ovarlapping area of both shank sections takes on the transmission of the tensile load occulIing in the dowel shank in that a diagonal strut is formed in the concrete between both of the dowel heads.
Although the reinforcing dowel in the invention is adjustable before installation in the direction in which the greatest load occurs after installation, namely along the length ofthe shank a frictional connection is established by the embedment in the surrounding concrete in this load direction, which is suitable for the taking on the greatest occurring load. This frictional connection be~ween both ofthe dowel parts that can be moved against each other occurs without mechanical non-positive connection of both ofthe dow~l parts and without special additional measures.
Although the basic task of a reinforcing element in a reinforced concrete section is to absorb those forces which can not be absorbed by concrete alone, the non-positive connection between both of ., :- . ` '~:
21488~
ILIE. ~I THIS ~i~-~ -T~ TRANSLATION
Reinforcing Dowel for Concrete Plates The invention relates to a reinforcing dowel as a bent-up bar for concrete plates, in particular reinforced concrete slabs w~owel shank which is provided with a dowel head on at least one .,. . ~
end.
Reinforcing dowels of this kind are inserted æ individual bent-up reinîorcing elements and drawn together to the dowel strips for use as bent-up bars in slabs and similarly used concrete plates.
The reir~orcing dowels are arranged perpendicular to the plate plane and bear the transverse load that rui~s perpendicular to the plate plane, in particular in the area of the attached supports. For this purpose, the reinforcing dowels are provided with a dowel head on at least one end of the dowel shank, which is mushroom-shaped and enlarged in contrast to the diameter of the shank ~ :
and which transfers the tensile load that occurs in the dowel shank into the surrounding concrete.
The other end of the dowel shank - when used as a single reinforcing element - can be provided with such a dowel head or - when used in a dowel strip - can be connected with a reinforcing strip that extends at a right angle to the length of the shank.
The length of this reinforcing dowel must be adjusted to the thickness of the concrete plate to be held. On one hand the thickness ofthe concrete plate should be used as much as possible to absorb the tensile fiorces introduced from the reinforcing dowels; on the other hand a sufficient concrete overlap on the dowel ends must be provided. Therefore the known one-piece reinforc~ng dowel must be provided a~ the length required in each application. This makes either an extensive inventory of different length reinforcing dowels or a special manufilcture fo~r each : :
individual application necessary. An adjustment ofthe dowel length is not possible at the construction site because machines, which are only available in the factory, are necessary for ~e :
''';';'~
'"'-'',-'.
21~8834 -2 - PCT/EP94/01232 ~ -driving the dowel heads, and because high quality requirements are placed on the welded connections of the dowel shank with a reinforcing strip, which can not be maintained acceptably at the construction site, but rather only in the factory.
The task of the invention is to develop a rein~orcing dowel of the type described in the beginning so that an adjustment of the length is possible with simple means at the construction site.
This problem is solved in the invention in that the dowel shank consists of two separate shank sections, which overlap one another partially, and that both of the shank sections have a dowel head on the ends facing one another that is enlarged in contrast to the diameter of the shank.
The reinforcing dowel is therefore designed as two pieces. Both of its shank sections can be telescoped together so that the dowel length desired in each case can be adjusted infinitely. When the two-part reinforcing dowel is concreted into this position, the surrounding concrete in the ovarlapping area of both shank sections takes on the transmission of the tensile load occulIing in the dowel shank in that a diagonal strut is formed in the concrete between both of the dowel heads.
Although the reinforcing dowel in the invention is adjustable before installation in the direction in which the greatest load occurs after installation, namely along the length ofthe shank a frictional connection is established by the embedment in the surrounding concrete in this load direction, which is suitable for the taking on the greatest occurring load. This frictional connection be~ween both ofthe dowel parts that can be moved against each other occurs without mechanical non-positive connection of both ofthe dow~l parts and without special additional measures.
Although the basic task of a reinforcing element in a reinforced concrete section is to absorb those forces which can not be absorbed by concrete alone, the non-positive connection between both of ., :- . ` '~:
21488~
the dowel parts occurs again through the concrete in the reinforcing dowel, and even under a type of load for which the concrete is especially suited, namely a pressure load.
For the preparation of the reinforcing dowel before the concreting, it suffices to select the overlap between both ofthe shank sections such that the reinforcing dowel maintains the desired total length, and to secure both of the shank sections in this position before and during the concreting.
A mutual arrangement of both shank sections is achieved in the configuration in the invention by each of the two dowel heads having an edge recess which accepts the other section of the shank.
Each of the two dowel heads centers itself in this way on the other respective shank section, so that a mutual arrangement of both shank sections is ensured when they are held together in the area where they overlap. This can occur preferably through a connection by means of a clamping devic4 which is at least one sliding wire loop in accordance with the simple and advantageous e~n~odiment.
Preferably the dowel head encompasses the shank section in the edge recess by more than 180.
It is then possible to achieve the mutual coMection of both dowel sections alone through the section of the dowel head encompassing the adjacent shank sections. For instance, ~e dowel head encompasses and catches the shank section accommodated in ~e edge recess in each case.
The connec~on of both shank sections can be established in a simple maMerby locking, and . .
therefore settin6 both shank sections into place after adjushng the desired dowel length in the .: ~
edge recess ofthe other resp~ctive dowel head. ;
For the mu~al arrangement of both shank sections in their overlapping area, spacers can be inserted Ln the overlapping area between both shank sections instead of edge recesses in the dowel head.
- 2 1 ~ 8 8 3 Further advantageous configuration of the inventive concept are the object of additional dependent claims.
Embodiments of the invention are explained in detail in the following, which are depicted in the drawing.
Fig. 1 shows a reinforcing dowel as a bent-up bar of a concrete plate from a side view.
Fig. 2 shows a cut along ~e Line II-II in Fig. 1.
Fig. 3 shows a modified embodiment of a reinforcing dowel with spacers in the overlapping area between both of the shank sections in a side view similar to Fig. 1.
Fig. 4 shows a cut along Line IV-IV in Fig. 3.
Fig. 5 shows an additional embodiment of a reinforcing dowel from a side view.
Fig. 6 shows a cut along Line VI-VI in Fig. S.
Fig. 7 shows a further embodiment of a reinforcing dowel from a side view.
Fig. 8 shows a cut along Line VIII-VIII through one of the two shank sections shown in Fig. 7.
Fig. 9 shows a reinforcing dowel installed as a bent-up bar element in a rein~orced concrete slab.
Fig. 10 shows the reinforcing dowel shown in Fig. 9 from a view in the X direction.
Fig. 11 shows a par~al cut through a reinforced concrete slab in the area ofthe supports with a dowel strip installed there, wh~ch has multiple reinforcing dowels of ~e kind described above. ~-The reinforcing dowel 1 shown in the side view in Fig. 1 is inserted æ a bent-up bar elèment in a ~ ;~
concrete plate 2, for example a reinforced concrete slab. The dowel shank of the reinforcing dowel 1 consists oftwo separate shank sections 3 and 4, which are designed as cylindrical steel rods in the depicted embodiment. Both shanlc sections 3, 4 are provided with a plate or .. . .
., ,, 2lq883~ , - 5 - PCT/EP94/012~2 mushroom-shaped dowel head S on their respective outer ends.
Both shank sections 3, 4 overlap one another partially and lay in parallel to one another in the overlapping area. On the ends which overlap one another, the shank sections 3, 4 each have a dowel head 6, 7, enlarged in contrast to diameter of the shank, which is designed largely as plate or mushroom-shaped like the dowel head S on the other end. In the portrayed embodiment the dowel heads 5, 6, and 7 each have a fiat truncated cone on the side facing the shank sections 3 and4.
In the embodiments shown in Fig. 1 and 2, both dowel heads 6, 7 are provided with an edge recess 8 or 9, which accommodates the other respective shank section 4 or 3, as one can clearly note in Fig. 2.
In the embodiment in Fig. 1 and 2 the edge recesses 8, 9 are shaped like an arc and engage the shank sections 4 or 3 by less than 180. Both shan~ sections 3, 4 are connected together by a sliding wire loop 10 which acts as a clamping device in their overlapping area. The leng~ of the ~-overlapping of both shanlc sections 3,4 is selected such ~at the desired overall leng~ ofthe reinforcing dowel 1 results. The reinforcing dowel 1 is concreted into this position. The surrounding concrete creates diagonal strut, indicated in Fig. 1, through which the tensile load -acting in the longitudinal direction is transmitted bet~,veen both shank sectioDs 3, 4, between both dowel heads 6, 7 through atensile loading ofthe reinforcing dowel 1.
The embodiment depicted in Pig. 3 and 4 of a reinforcing dowel differs from the example in Fig. 1 and 2 largely in that the dowel heads 6, 7 have no edge recesses on their overlapping ends ofthe shank sec~ions 3, 4, but rather completely resembles the dowel heads 5. To obtain an arran8ement of both of the shank sections 3, 4 which par~ally overlap one another, two spacers ~ -.::
.
` 21 ~ 8834 12 are inserted in the overlapping area, each which have two opposing notches 13 (Fig. 4), in which both shank sections 3, 4 lay. In Fig. 3, it is shown that both shank sections 3, 4 can be held together in the desired position by, for example, two sliding wire loops 10.
In the e~ample in Fig. S and 6, both dowel heads 6' and 7', which are constructed here as short plates, encompass and catch the shank section 4 or 3, accommodated in their edge recesses 8' or 9', respectively. In the example of the edge recess 9' (the edge recess 8' is similarly constructed) is depicted in Fig. 6, that the edge recess 9' of the dowel head r has a narrowing 14, whose inner width is smaller than the diameter of the shank of the shank section 3 or 4 that is to be accomrnodated. The distance from the inner edge 9a of the edge recess 9' to this narrowing 14 is greater than the shank diameter. In this way it is achieved that the shank section 3 catches in the edge recess 9', when this is pressed over the shank section 3. In the same way the edge recess 8' catches on the other shank section 4. The inner width ofthe edge recesses 8' and 9' are preferably chosen in such a way that a clamping e~ect still e~sts between the edge recesses 8' and 9' on one ~ -hand and the accommodated shank sections 4 or 3 on the other side after connec~ng both shank ~ .
sections 3, 4. In this way both shank sections 3, 4 are held non-fle~bly in the given mutual arrangement during the concreting.
The embodiment in Fig. 7 and 8 dii~ers ~om the previously described examples in that the edge recess 9" (and in the same way also edge recess 8") is cut out of the dowel head 7 in a nearly .
triangular shape. The section 15 ofthe dowel head 7, lying on both sides ofthe edge recess which forms the naIrowing 14, can be unfolded as flanks as is shown in Fig. 8, to accommodate the shank sections 3 and 4 to be accommodated. These sections 15 ofthe dowel head 7 can be - .
formed in one place, in which they encompass and hold the accommodated shank sec~on 3 or 4 214883~
For the preparation of the reinforcing dowel before the concreting, it suffices to select the overlap between both ofthe shank sections such that the reinforcing dowel maintains the desired total length, and to secure both of the shank sections in this position before and during the concreting.
A mutual arrangement of both shank sections is achieved in the configuration in the invention by each of the two dowel heads having an edge recess which accepts the other section of the shank.
Each of the two dowel heads centers itself in this way on the other respective shank section, so that a mutual arrangement of both shank sections is ensured when they are held together in the area where they overlap. This can occur preferably through a connection by means of a clamping devic4 which is at least one sliding wire loop in accordance with the simple and advantageous e~n~odiment.
Preferably the dowel head encompasses the shank section in the edge recess by more than 180.
It is then possible to achieve the mutual coMection of both dowel sections alone through the section of the dowel head encompassing the adjacent shank sections. For instance, ~e dowel head encompasses and catches the shank section accommodated in ~e edge recess in each case.
The connec~on of both shank sections can be established in a simple maMerby locking, and . .
therefore settin6 both shank sections into place after adjushng the desired dowel length in the .: ~
edge recess ofthe other resp~ctive dowel head. ;
For the mu~al arrangement of both shank sections in their overlapping area, spacers can be inserted Ln the overlapping area between both shank sections instead of edge recesses in the dowel head.
- 2 1 ~ 8 8 3 Further advantageous configuration of the inventive concept are the object of additional dependent claims.
Embodiments of the invention are explained in detail in the following, which are depicted in the drawing.
Fig. 1 shows a reinforcing dowel as a bent-up bar of a concrete plate from a side view.
Fig. 2 shows a cut along ~e Line II-II in Fig. 1.
Fig. 3 shows a modified embodiment of a reinforcing dowel with spacers in the overlapping area between both of the shank sections in a side view similar to Fig. 1.
Fig. 4 shows a cut along Line IV-IV in Fig. 3.
Fig. 5 shows an additional embodiment of a reinforcing dowel from a side view.
Fig. 6 shows a cut along Line VI-VI in Fig. S.
Fig. 7 shows a further embodiment of a reinforcing dowel from a side view.
Fig. 8 shows a cut along Line VIII-VIII through one of the two shank sections shown in Fig. 7.
Fig. 9 shows a reinforcing dowel installed as a bent-up bar element in a rein~orced concrete slab.
Fig. 10 shows the reinforcing dowel shown in Fig. 9 from a view in the X direction.
Fig. 11 shows a par~al cut through a reinforced concrete slab in the area ofthe supports with a dowel strip installed there, wh~ch has multiple reinforcing dowels of ~e kind described above. ~-The reinforcing dowel 1 shown in the side view in Fig. 1 is inserted æ a bent-up bar elèment in a ~ ;~
concrete plate 2, for example a reinforced concrete slab. The dowel shank of the reinforcing dowel 1 consists oftwo separate shank sections 3 and 4, which are designed as cylindrical steel rods in the depicted embodiment. Both shanlc sections 3, 4 are provided with a plate or .. . .
., ,, 2lq883~ , - 5 - PCT/EP94/012~2 mushroom-shaped dowel head S on their respective outer ends.
Both shank sections 3, 4 overlap one another partially and lay in parallel to one another in the overlapping area. On the ends which overlap one another, the shank sections 3, 4 each have a dowel head 6, 7, enlarged in contrast to diameter of the shank, which is designed largely as plate or mushroom-shaped like the dowel head S on the other end. In the portrayed embodiment the dowel heads 5, 6, and 7 each have a fiat truncated cone on the side facing the shank sections 3 and4.
In the embodiments shown in Fig. 1 and 2, both dowel heads 6, 7 are provided with an edge recess 8 or 9, which accommodates the other respective shank section 4 or 3, as one can clearly note in Fig. 2.
In the embodiment in Fig. 1 and 2 the edge recesses 8, 9 are shaped like an arc and engage the shank sections 4 or 3 by less than 180. Both shan~ sections 3, 4 are connected together by a sliding wire loop 10 which acts as a clamping device in their overlapping area. The leng~ of the ~-overlapping of both shanlc sections 3,4 is selected such ~at the desired overall leng~ ofthe reinforcing dowel 1 results. The reinforcing dowel 1 is concreted into this position. The surrounding concrete creates diagonal strut, indicated in Fig. 1, through which the tensile load -acting in the longitudinal direction is transmitted bet~,veen both shank sectioDs 3, 4, between both dowel heads 6, 7 through atensile loading ofthe reinforcing dowel 1.
The embodiment depicted in Pig. 3 and 4 of a reinforcing dowel differs from the example in Fig. 1 and 2 largely in that the dowel heads 6, 7 have no edge recesses on their overlapping ends ofthe shank sec~ions 3, 4, but rather completely resembles the dowel heads 5. To obtain an arran8ement of both of the shank sections 3, 4 which par~ally overlap one another, two spacers ~ -.::
.
` 21 ~ 8834 12 are inserted in the overlapping area, each which have two opposing notches 13 (Fig. 4), in which both shank sections 3, 4 lay. In Fig. 3, it is shown that both shank sections 3, 4 can be held together in the desired position by, for example, two sliding wire loops 10.
In the e~ample in Fig. S and 6, both dowel heads 6' and 7', which are constructed here as short plates, encompass and catch the shank section 4 or 3, accommodated in their edge recesses 8' or 9', respectively. In the example of the edge recess 9' (the edge recess 8' is similarly constructed) is depicted in Fig. 6, that the edge recess 9' of the dowel head r has a narrowing 14, whose inner width is smaller than the diameter of the shank of the shank section 3 or 4 that is to be accomrnodated. The distance from the inner edge 9a of the edge recess 9' to this narrowing 14 is greater than the shank diameter. In this way it is achieved that the shank section 3 catches in the edge recess 9', when this is pressed over the shank section 3. In the same way the edge recess 8' catches on the other shank section 4. The inner width ofthe edge recesses 8' and 9' are preferably chosen in such a way that a clamping e~ect still e~sts between the edge recesses 8' and 9' on one ~ -hand and the accommodated shank sections 4 or 3 on the other side after connec~ng both shank ~ .
sections 3, 4. In this way both shank sections 3, 4 are held non-fle~bly in the given mutual arrangement during the concreting.
The embodiment in Fig. 7 and 8 dii~ers ~om the previously described examples in that the edge recess 9" (and in the same way also edge recess 8") is cut out of the dowel head 7 in a nearly .
triangular shape. The section 15 ofthe dowel head 7, lying on both sides ofthe edge recess which forms the naIrowing 14, can be unfolded as flanks as is shown in Fig. 8, to accommodate the shank sections 3 and 4 to be accommodated. These sections 15 ofthe dowel head 7 can be - .
formed in one place, in which they encompass and hold the accommodated shank sec~on 3 or 4 214883~
by more than 180. Similar to the example in Fig. 5 and 6, a separate clamping device is done away with. .
In Fig. 9 and 10, the use of a reinforcing dowel 1, for example in the embodiment in Fig. 1 and 2, is depicted in a reinforced slab 2. The upper shank section 3 of the reinforcing dowel 1 is welded with a cross strip 18, which lays on adjacent reinforcement rods of the reinforcing mat 16. The total length of the reinforcing dowel 1 is adjusted by a suitable selection of the length of the overlapping between the two shank sections 3, 4 such that the dowel head 5 of the lower shank sectio~i 4 lies at the height of the lower reinforcing mat 17. In this way an effecbve shear .
connection between both reinforcing mats 16, 17 is achieved, whereby a sufflcient concrete overlap is still ensured. ;
Fig. 11 shows partial view of a reinforced concrete slab 2, which is supported by concrete supports 19. In the area around the supports 19, several dowel strips 20 are arranged radially, .
which exist on several like reinforcing dowels 1 of the illustrative form des ribed above arranged at a distance and a reinforcing strip 21 extending at a right angle to the length ofthe shanlc, which extends into the supports with one of its ends 22. The one lower shanl~ section 4 of each reinforcing dowel 1 is welded on its lower end with the reinforcement strip 21. The ;
reinforcement strip 21 lies directly under a lower reinforcing mat 17. The upper dowel heads 5 extend into the area of an upper reinforcing mat 16 ofthe reinforced concrete slab 2.
, . ~. - . , .
~... .
, ..~..
In Fig. 9 and 10, the use of a reinforcing dowel 1, for example in the embodiment in Fig. 1 and 2, is depicted in a reinforced slab 2. The upper shank section 3 of the reinforcing dowel 1 is welded with a cross strip 18, which lays on adjacent reinforcement rods of the reinforcing mat 16. The total length of the reinforcing dowel 1 is adjusted by a suitable selection of the length of the overlapping between the two shank sections 3, 4 such that the dowel head 5 of the lower shank sectio~i 4 lies at the height of the lower reinforcing mat 17. In this way an effecbve shear .
connection between both reinforcing mats 16, 17 is achieved, whereby a sufflcient concrete overlap is still ensured. ;
Fig. 11 shows partial view of a reinforced concrete slab 2, which is supported by concrete supports 19. In the area around the supports 19, several dowel strips 20 are arranged radially, .
which exist on several like reinforcing dowels 1 of the illustrative form des ribed above arranged at a distance and a reinforcing strip 21 extending at a right angle to the length ofthe shanlc, which extends into the supports with one of its ends 22. The one lower shanl~ section 4 of each reinforcing dowel 1 is welded on its lower end with the reinforcement strip 21. The ;
reinforcement strip 21 lies directly under a lower reinforcing mat 17. The upper dowel heads 5 extend into the area of an upper reinforcing mat 16 ofthe reinforced concrete slab 2.
, . ~. - . , .
~... .
, ..~..
Claims (10)
1. The invention relates to a reinforcing dowel as a bent-up bar for concrete plates, in particular reinforced concrete slabs with a dowel shank which is provided with a dowel head (5) on at least one end, characterized by that the dowel shank consists of two separate shank sections (3, 4), which overlap one another partially, and that both of the shank sections (3, 4) have a dowel head (6 or 7), which is enlarged in contrast to the shank diameter, on their ends which are facing one another.
2. Reinforcing dowel as in claim 1, characterized by that each of the two dowel heads (6, 7) has an edge recess (8, 9, 8', 9', 8", 9") accommodating the other shank section (4 or 3).
3. Reinforcing dowel as in claim 2, characterized by that the dowel head (6, 7) encompasses the shank section (3 or 4) accommodated by the edge recess (8', 9', 9") by more than 180°.
4. Reinforcing dowel as in claim 3, characterized by that the dowel head (6, 7) encompasses and catches the shank section (3 or 4) accommodated by the edge recess (8', 9').
5. Reinforcing dowel as in claims 3 or 4, characterized by that the edge recess (8', 9') of the dowel head (6' or 7') has a narrowing (14), whose inner width is smaller than the diameter of the shank of the shank section (4 or 3) to be accommodated, and that the distance from the inner edge (9a) of the edge recess (8' or 9') to the narrowing (14) is greater than the diameter of the shank.
6. Reinforcing dowel as in claim 5, characterized by that sections (15) of the dowel head (7) which lie on both sides of the edge recess (9") and form the narrowing (14) can be shaped in one of the positions encompassing the accommodated shank sections (3) by more than 180°.
7. Reinforcing dowel as in claim 1, characterized by that both shank sections (3, 4) are connected with one another in their overlapping area by a clamping device.
8. Reinforcing dowel as in claim 7, characterized by that the clamping device is at least one sliding wire loop (10).
9. Reinforcing dowel as in claim 1, characterized by that between both shank sections (3, 4) in their overlapping area at least one spacer (12) is inserted.
10. Reinforcing dowel as in any of claims 1-9, characterized by that the one shank section (4) is connected with a reinforcing strip (21) extending at a right angle to the length of the shank, which carries several like reinforcing dowels (1) arranged at a distance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19934315900 DE4315900C1 (en) | 1993-05-12 | 1993-05-12 | Reinforcement anchors for concrete slabs |
| DEP4315900.1 | 1993-05-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2148834A1 true CA2148834A1 (en) | 1994-11-24 |
Family
ID=6487937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2148834 Abandoned CA2148834A1 (en) | 1993-05-12 | 1994-04-21 | Reinforcing dowel for concrete plates |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0698161A1 (en) |
| JP (1) | JPH08510303A (en) |
| AU (1) | AU6646294A (en) |
| CA (1) | CA2148834A1 (en) |
| DE (1) | DE4315900C1 (en) |
| NO (1) | NO953374L (en) |
| WO (1) | WO1994026996A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0744508B1 (en) * | 1995-05-11 | 1998-11-11 | HALFEN GmbH & CO. Kommanditgesellschaft | Device for forming a shear reinforcement for flat slabs |
| DE10312701B4 (en) * | 2003-03-21 | 2007-10-31 | Krummel, Gerhard, Dipl.-Ing. | Arrangement for fixing an anchor bolt of a support in a foundation |
| CN104718332B (en) * | 2012-09-05 | 2017-03-08 | 韩国建设技术研究院 | Punching Shear is with strengthening component and construction method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1440751A (en) * | 1965-04-20 | 1966-06-03 | Fischer & Co Fa | Reinforcement device for concrete constructions |
| DE2727159C3 (en) * | 1977-06-16 | 1980-05-08 | 7000 Stuttgart | Shear reinforcement for flat slabs made of reinforced or prestressed concrete on concrete supports |
| US4362423A (en) * | 1980-09-08 | 1982-12-07 | Williams Form Engineering Corporation | Coupling for coil-thread rebar |
| DE3331275A1 (en) * | 1983-08-30 | 1985-03-14 | Gleit- Und Lagertechnik Nell Gmbh, 5620 Velbert | Shear-reinforcing element |
| DE3411591C1 (en) * | 1984-03-29 | 1985-06-13 | Hochtief Ag Vorm. Gebr. Helfmann, 4300 Essen | Shear reinforcement element for reinforced concrete structures |
| DE3515894A1 (en) * | 1985-05-03 | 1986-11-06 | Jan Dipl.-Ing. 7032 Sindelfingen Smitka | Bar-shaped reinforcing spacer, which can be deflected, for reinforced-concrete walls and prefabricated compound units in the building industry |
| US4968176A (en) * | 1988-02-29 | 1990-11-06 | Balach David M | Reinforcing bar coupling device |
| DE4129903A1 (en) * | 1991-09-09 | 1993-03-11 | Deha Ankersysteme | DUEBELLEIBTE |
-
1993
- 1993-05-12 DE DE19934315900 patent/DE4315900C1/en not_active Expired - Fee Related
-
1994
- 1994-04-21 CA CA 2148834 patent/CA2148834A1/en not_active Abandoned
- 1994-04-21 AU AU66462/94A patent/AU6646294A/en not_active Abandoned
- 1994-04-21 EP EP94915074A patent/EP0698161A1/en not_active Withdrawn
- 1994-04-21 JP JP6524856A patent/JPH08510303A/en active Pending
- 1994-04-21 WO PCT/EP1994/001232 patent/WO1994026996A1/en not_active Application Discontinuation
-
1995
- 1995-08-28 NO NO953374A patent/NO953374L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO1994026996A1 (en) | 1994-11-24 |
| NO953374D0 (en) | 1995-08-28 |
| DE4315900C1 (en) | 1994-07-21 |
| EP0698161A1 (en) | 1996-02-28 |
| JPH08510303A (en) | 1996-10-29 |
| NO953374L (en) | 1995-11-13 |
| AU6646294A (en) | 1994-12-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |