EP1902186A1

EP1902186A1 - Connecting device

Info

Publication number: EP1902186A1
Application number: EP06828788A
Authority: EP
Inventors: Matthias Kintscher
Original assignee: Pfeifer Holding GmbH and Co KG
Current assignee: Pfeifer Holding GmbH and Co KG
Priority date: 2005-06-27
Filing date: 2006-06-27
Publication date: 2008-03-26
Anticipated expiration: 2026-06-27
Also published as: CA2613181A1; CA2613181C; ES2313685T3; DE502006001786D1; EP1902186B1; DK1902186T3; ATE410573T1; WO2007031128A1; US20090199493A1; DE202005010080U1; PL1902186T3; CN101208489A

Abstract

The connector has an oblong box (2) for insertion into a face of the construction units, a floor (5) and at least two longitudinal side panels (6) and at least one flexible armoring loop element (3) movably accommodated in the oblong box. The floor is profiled with groups of floor projections and recesses (7 ') alternating in the longitudinal direction, whereby each group has at least one projection and/or at least one recess.

Description

connecting device

Technical area

The invention relates to a connecting device according to the preamble of claim 1.

State of the art

In order to build supporting structures of a building made of precast concrete parts, the precast concrete parts must be connected to each other with a force fit. Disc-shaped wall elements are connected to each other or vertical supports on vertical joints. At the end faces of the elements corresponding Vergussnuten are arranged on the basis of connecting elements are arranged with storage boxes containing fold-out reinforcing elements. These reinforcing elements may for example consist of reinforcing steel. Such a so-called reverse bending connection is disclosed, for example, in DE 39 37 275 A1, but has the disadvantage that the bending back of the reinforcing steel is cumbersome and requires a lot of effort and requires robust storage boxes with large dimensions.

In another concept, the reinforcing elements can also be designed as flexible rope elements. Such storage boxes are disclosed, for example, in WO 03/008737, EP 0 914 531 A1 or EP 0 534 475 A1. By folding out these flexible rope elements are perpendicular to the front side loop-like elements available that overlap when assembling the precast elements in the joint. The loops that overlap in the joint are usually grouted over the entire height of the precast elements in the grouting joint with joint mortar. After its hardening, the grouting joint can transfer forces in different directions thanks to the overlapping connecting elements, ie tensile forces in the overlap perpendicular to the joint, ie perpendicular to the end face of the precast elements, transverse forces perpendicular to the plane of the pane and, most importantly, transverse force parallel to the joint longitudinal direction. The latter represents a construction practice very frequently occurring load case.

In contrast to the above-discussed custody boxes with rigid reinforcing elements (reinforcing bars), however, the flexible cable elements contribute only indirectly to the transverse force transmission, since they counteract widening of the joint, but due to their flexibility can build only small force components in the direction of lateral force.

Presentation of the invention

It is therefore an object of the present invention to provide a connecting device of the type mentioned above with at least one flexible reinforcing loop element, which has an improved transverse force carrying behavior in a simple construction.

This object is achieved according to the present invention by a connecting device with the features of claim 1. Advantageous developments of the invention are specified in the dependent claims.

The invention is based on the idea that

Transverse force carrying behavior by an optimized toothing between the storage box of the connecting device and the To improve the surrounding concrete and reduce the stress of the wall component side of the storage box. For this purpose, the invention provides that the bottom of the storage bin has a bottom profiling with longitudinally alternating groups of bottom projections and bottom recesses, each group having at least one bottom projection or at least one bottom recess.

The alternating arrangement of the bottom projections and bottom recesses results in a high overall toothing between the trolley bottom and concrete, which can be achieved with comparatively low production costs, in particular comparatively low degrees of deformation when forming the bottom projections and bottom recesses. The high overall toothing results in that transverse force stresses can be introduced into the respective concrete component in a low-slip manner via the floor box, so that the power transmission can be activated via the connection device before a pronounced crack formation occurs in the concrete. Furthermore, the transverse force is introduced via the floor box at a point in the concrete component, where this is no longer weakened by the joint. In this way, a frequently critical breakage of the component edges in the region of the joint is minimized.

Last but not least, the formation of the deposit box floor also has a favorable effect on the power transmission within the joint itself, ie between the grouting mortar, the flexible reinforcing loop elements and the storage box. In this area, the bearing behavior can be imagined by a framework model with tension and compression struts (although the present invention is not limited by this model conception). Upon attack of joint-parallel transverse forces and their transmission via the Vergussfuge arise obliquely from the trolley bottom and side walls outgoing struts, which are located opposite each other Support deposit box. This support of the relevant for the bearing behavior, inclined struts pressure is significantly improved by the design of the deposit box floor with alternating projections and depressions. At the same time, the flexible reinforcing loop elements ensure that the output force generated by the obliquely placed struts, which tends to widen the joint, is taken up and passed on.

As has been shown in extensive tests and analyzes, the result is an optimum combination of total gearing or transverse force carrying behavior and ease of manufacture, if according to a development of the present invention, the bottom projections and the bottom recesses each have a maximum height, wherein the sum of the height of soil recesses or Bottom projections of adjacent groups define a total gear depth which is in the range of 3 to 9 mm, preferably 5.5 to 6.5 mm. It is particularly preferred that the bottom protrusions and bottom recesses have substantially the same height, i. For example, with a total toothing depth of 6 mm, each a height of 3 mm. This results in the production of Verwahrkastens a particularly low and uniform degree of deformation of the bottom projections or recesses, while at the same time adjusts a uniform load on both the inside and on the outside of the tavern floor. As will be discussed in more detail below, this effect is the more pronounced the smaller the distance between the bottom projections and depressions.

According to a further aspect of the present invention, it is provided that the side walls of the storage box each have a wall profiling with longitudinally alternating groups of wall projections and

Have wall recesses, each group has at least one wall projection or at least one wall recess. In this way, the overall toothing between the storage box with the grout in the joint on the one hand and the concrete of the component on the other hand can be further improved, resulting in particular at a shear stress in the longitudinal direction of the elongated storage box an improved structural behavior.

In the experiments and analyzes already mentioned above, the inventors have found that a particularly advantageous combination between lateral force carrying capacity and ease of manufacture of the connecting device results when the wall projections and wall recesses each have a maximum height according to a development of the present invention, the sum of Height of wall depressions or wall projections of adjacent groups defines a Gesamtverzahnungstiefe which is in the range of 2 to 6 mm, preferably 3.5 to 4.5 mm. It is also particularly preferred in view of the wall projections and depressions that they have substantially the same height, i. For example, with a total tooth depth of 4 mm, each a height of 2 mm, with the advantages discussed above.

The configuration of the bottom profiling and the wall profiling is, except that it is arranged alternately, not particularly limited in the context of the present invention. However, it has been found to be advantageous for the structural behavior and the manufacturability, if the bottom profiling and / or the wall profiling is wave-shaped or sawtooth-like. Likewise, further forms of soil profiling or wall profiling are particularly preferred, which will be explained in more detail below with reference to the figures.

In principle, the bottom projections or the bottom recesses in the context of the present invention can also contribute to tensile forces in the respective concrete component initiate. However, it has proved to be advantageous to assign the transmission of tensile forces primarily to the flexible reinforcing loop elements, since these have a significantly greater anchoring depth in the respective concrete component, so that they allow a tensile force introduction with high load capacity and low deformation. Against this background, it is provided according to a development of the present invention that the bottom projections and / or the bottom recesses are trapezoidal and have flanks, which are aligned substantially perpendicular to the ground. In this way, the bottom projections and the bottom recess contribute optimally to the transverse force transmission, but leave the tensile force transmission (perpendicular to the joint) largely to the flexible reinforcing loop elements.

The same considerations apply analogously to the wall projections or wall recesses, which, according to an embodiment of the present invention, have a lower anchoring resistance in concrete in a direction perpendicular to the ground and thus to the joint than in a direction deviating therefrom. This embodiment, in addition to the already discussed advantages in the load transfer into the concrete and an improved structural behavior in the mortar grouted joint caused. Thus, in the above discussed framework model with an obliquely engaging strut whose component perpendicular to the joint causes little or no additional forces on the side walls of the custody box and thus the component flanks in the joint area, but anchors primarily on the box bottom. At the same time, the transverse force components acting parallel to the joint can continue to be effectively anchored to the side walls of the storage box, which promotes power transmission in that direction.

Within the scope of this concept, it has proved to be advantageous for the wall projections and the wall recesses to have an elongated shape which extends substantially perpendicular to the floor. The narrow side of this elongated shape allows the desired, lower anchoring resistance perpendicular to the ground, while the long side of the elongated shape provides the transverse force components acting parallel to the joint a favorable support surface. It is particularly preferred that the elongated shape of the wall projections and wall recesses tapers in the direction away from the bottom, resulting in a correspondingly low anchoring resistance in the direction away from the bottom.

The groups of bottom projections and bottom recesses alternating in the longitudinal direction of the oblong storage box may, within the scope of the present invention (also within a single connecting device), have different distances from one another. According to a preferred embodiment of the present invention, however, it is provided that the bottom projections and the bottom recesses or wall projections and the wall recesses of adjacent groups are separated by a narrow intermediate surface or merge directly into one another. The narrower the respective intermediate surfaces, the better the adjacent groups of projections and depressions complement one another to a large overall toothing depth with a correspondingly advantageous transverse force carrying behavior.

According to a further aspect of the present invention it is provided that the storage box is designed such that two opposite storage boxes of interconnected concrete components form the smallest possible Vergussfuge that can accommodate the respective flexible reinforcement loop elements in the unfolded state including a tolerance field just. As a result, a small joint volume and thus a reduced need for high quality and expensive grout is achieved when connecting the concrete components. In addition, affects this configuration also favorable to the transverse force bearing behavior.

Brief description of the drawings

Fig. Ia schematically shows a perspective view of a first embodiment of a connecting device according to the present invention;

FIG. 1b schematically shows a perspective view of a

Storage box of a connecting device of a second embodiment of the present invention;

Fig. Ic shows schematically a perspective view of a

Storage box of a connecting device of further embodiments of the present invention;

Fig. 2a shows schematically a sectional view of a

Storage box of a connecting device according to further embodiments of the present invention;

Fig. 2b shows schematically different, exemplary

Sectional views along the line A-A in Fig. 2a;

Fig. 3 shows schematically a perspective view of a component connection using the connecting device according to the invention;

Fig. 4 shows schematically a partial plan view of the component connection shown in Fig. 3. Detailed description of preferred embodiments

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

Fig. Ia schematically shows a perspective view of a connection device 1 as a first embodiment of the present invention. The connecting device 1 is used for the transverse force-locking connection of concrete components, in particular precast concrete components, which will be described below in more detail with reference to FIGS. 3 and 4.

The connecting device 1 comprises an elongate storage box 2, which is made, for example, of sheet metal and intended to be concreted into an end face of concrete components. The storage box 2 has a bottom 5 and two extending in the longitudinal direction of the bottom side walls 6. The bottom has through holes through each of which a flexible reinforcing loop member 3 extends such that the loop portion comes to rest in the region of the side walls 6, while the opposite side is provided in each case a compression sleeve 3 ', which connects the free ends of the reinforcement loop element 3 together and contributes to an improved anchoring in concrete. The flexible reinforcing loop element may, for example, be a rope formed of wires or wire strands, the reinforcing loop element being receivable between and deflectable out of the side walls 6 due to its flexibility in the storage box. In this case, FIG. 1 a shows the deflected state of the flexible reinforcing loop elements 3.

The bottom 5 of the storage box 2 has a profiling in the form of bottom projections 7 and bottom recesses 7 ', which in Longitudinal direction of the storage box 2 are at least partially arranged alternately. Thus, in the present embodiment, in each case two bottom depressions 7 'are provided with a bottom projection 7 arranged in between adjacent each passage opening for a flexible reinforcing loop element 3. However, in the context of the present invention, any other number of bottom protrusions or recesses are possible, provided that they are arranged alternately.

Similarly, the side walls 6 each have a wall profile in the form of wall projections 8 and wall recesses 8 ', which are arranged alternately in the longitudinal direction of the storage box 2. Between the bottom projections and recesses or wall projections and recesses, respective intermediate surfaces 13 of different sizes are provided.

The dimensions of the respective projections and recesses 7, 7 ', 8, 8' can be varied within a wide range in the context of the present invention. In the present embodiment, the bottom protrusions 7 and the bottom recesses 7 'each have a depth (an extension perpendicular to the bottom 5) of 3 mm, resulting in a total gear depth of 6 mm. Similarly, the wall projections 8 and the wall recesses 8 'each have a height of 2 mm, which results in the region of the side walls 6 a total toothing depth of 4 mm.

FIG. 1b schematically shows a perspective view of a second embodiment of a storage box 2 in the area between reinforcing loop elements (not shown here). This differs from the embodiment shown in Fig. Ia first by the fact that a larger number of bottom projections 7 and bottom recesses 7 'is arranged continuously alternately along the bottom 5. In addition, the bottom projections 7 and the Bottom recesses 7 'in the present embodiment have a trapezoidal shape and have flanks 7'', which are aligned substantially perpendicular to the bottom 5. Although in Fig. 1b there are intermediate surfaces 13 between the bottom protrusions 7 and bottom recesses 7 ', the interlocking with the surrounding concrete can be further enhanced by making the intermediate surfaces 13 narrower or completely omitted, so that the bottom protrusions 7 and bottom recesses 7' directly merge ,

Furthermore, the storage box 2 shown in Fig. Ib differs from the embodiment shown in Fig. Ia by the configuration of the wall projections or recesses. Although only wall projections 8 are shown in FIG. 1 b, the embodiment shown in FIG. 1 b may also have wall protrusions and recesses arranged alternately according to the embodiment shown in FIG. 1 a. Independently of this, in the embodiment shown in FIG. 1b, the wall projections 8 are designed such that they have a lower anchoring resistance in concrete in a direction essentially perpendicular to the bottom 5 than in a direction deviating therefrom. More specifically, the wall projections 8 (or the wall recesses 8 'not shown here) have an elongated shape that extends substantially perpendicular to the bottom and tapers in a wedge shape in the direction away from the bottom 5. This results in a reduced stress on the side walls 6 adjacent flanks of the respective concrete component.

Fig. Ic shows further embodiments of the storage box 2 in a schematic perspective view. In this case, Fig. Ic illustrates in particular different

Design options for the wall recesses 8 ', wherein also in Fig. Ic (although not shown) may be provided according to alternating wall projections and wall recesses. A number of in the context of the present Invention conceivable embodiments of the wall recesses 8 '(or corresponding, alternately arranged wall projections 8) is shown schematically in the lower part of Fig. Ic. All of these embodiments have an elongated shape, which may for example also be formed by a group of several round or other shapes. Moreover, it can be seen in FIG. 1 c that a tapering configuration of the molds is preferred in order to minimize the stress on the flanks of the respective concrete component adjoining the side walls 6. In this case, the wall recesses 8 'can taper both in their width and in their depth.

The embodiment of the bottom projections 7 or bottom recesses 7 'shown in FIG. 1c essentially corresponds to the embodiment shown in FIG. 1d, wherein instead of a rectangular shape, a round shape is used here.

Fig. 2a shows schematically a sectional view of another storage box of a connecting device according to the present invention, with reference to which various embodiments with regard to the configuration of the bottom projections and recesses are explained. FIG. 2b schematically shows various exemplary sectional views along the line A-A in FIG. 2a. It should be noted, however, that the sectional views shown in FIG. 2 d are equally applicable to a cut which is guided in the region of the wall projections 8 or wall recesses 8 'in FIG. 2 a.

As can be seen in Fig. 2b, the bottom projections 7 and the bottom recesses 7 '(or the wall projections 8 and the wall recesses 8') in the context of the present invention can be configured in many different ways, with the design on the large and Whole as wavy or sawtooth summarize. In this case, the individual projections 7 and recesses 7 'by preferred narrow interfaces may be separated from each other or even directly into each other. Also, the bottom projections 7 or bottom recesses 7 'may each be formed by two or more, jointly grouped projections or recesses, as shown for example in Fig. 2b in the third embodiment from below.

Further, Fig. 2a shows two variants for the design of the wall projections 8 and wall recesses 8 '. While the wall projections 8 and wall depressions 8 'shown on the right in FIG. 2a have a constant height, the wall projections 8 and wall recesses 8' shown on the left in FIG. 2a are designed to taper (with decreasing height), with the load-carrying advantages discussed above.

The use of the inventive device 1 for joining concrete components or precast concrete components 20 is shown schematically in FIG. 3 in a perspective view. The connecting devices 1 are concreted into end faces 20 'of the prefabricated concrete components 20 in such a way that the interior defined by the side walls 6 faces outwards with the reinforcing loop elements 3. Subsequently, the precast concrete components 20 are placed with their end faces 20 'together, whereby a grout 4 is formed between adjacent connecting devices 1. The reinforcement loop elements 3 are deflected out of the storage boxes 2 in such a way that they overlap with a corresponding reinforcement loop element 3 of the adjacent storage box 2.

Subsequently, a transverse reinforcement in the form of a reinforcing bar 16 is inserted through the overlapping reinforcement loop elements 3, after which the grout 4 can be cast with a suitable grout. In this way, a transverse force-locking (and also normal force-fit) connection between the two precast concrete components 20 is achieved. A plan view of the component connection shown in Fig. 3 is shown in Fig. 4 in a partial, schematic view. Although the prefabricated concrete elements 20 are not shown in FIG. 4, it can be seen that the respective bottom projections 7, bottom recesses 7 ', wall projections 8 and wall recesses 8' for effective gearing both between the connecting device 1 and the concrete of the precast concrete components and between Connecting device 1 and to be provided in the grout 4 mortar allows.

4 shows that the storage box 2, in particular the width b of the bottom 5, the height h and the inclination α of the side walls 6, is designed such that the two opposite deposit boxes 2 can be pushed together tightly, as small as possible Forming Vergussfuge 4, which can accommodate the respective flexible reinforcement loop elements (3) in the unfolded state including a tolerance field just. For this purpose, the width b of the bottom 5, the height h and the inclination α of the side walls 6 in the present embodiment are advantageously adapted to the course of the respective reinforcing loop element 3.

Claims

claims

1. Connecting device (1) for the transverse force-locking connection of concrete components (20), in particular precast concrete components, comprising

an oblong storage box (2) for insertion into an end face (20 ') of the components (20), which has a bottom (5) and at least two side walls (6) extending in a longitudinal direction of the bottom,

at least one flexible reinforcement loop element (3) which can be received in the storage box (2) and can be deflected out of it,

characterized in that the bottom (5) has a bottom profile with longitudinally alternating groups of bottom projections (7) and bottom recesses (V), each group having at least one bottom projection (7) or at least one bottom recess (7 ').

2. Connecting device according to claim 1, characterized in that the bottom projections (7) and bottom recesses (7 ') each have a maximum height, wherein the sum of the height of BodenvorSprüngen

(7) or bottom depressions (7 ') of adjacent groups defines a total toothing depth which is in the range of 3 to 9 mm, preferably 5.5 to 6.5 mm.

3. Connecting device according to claim 1 or 2, characterized in that the BodenvorSprünge (7) and bottom recesses (7 ') have substantially the same height.

4. Connecting device according to one of the preceding claims, characterized in that the side walls

(6) each have a wall profiling with longitudinally alternating groups of wall projections (8) and wall recesses (8 '), each group having at least one wall projection (8) or at least one wall recess (8').

5. Connecting device according to claim 4, characterized in that the wall projections (8) and wall recesses (8 ') each have a maximum height, wherein the sum of the height of wall projections (8) or wall recesses (8') of adjacent groups a

Total toothing defined, which is in the range of 2 to 6 mm, preferably 3.5 to 4.5 mm.

6. Connecting device according to claim 4 or 5, characterized in that the wall projections (8) and wall recesses (8 ') have substantially the same height.

7. Connecting device according to one of the preceding claims, characterized in that the bottom profiling and / or the wall profiling is wave-shaped or sawtooth-like.

8. Connecting device according to one of claims 1 to 6, characterized in that the bottom projections (7) and / or the bottom recesses (7 ') are trapezoidal and flanks (7' ') which are substantially perpendicular to the bottom (5) are aligned.

9. Connecting device according to one of the preceding claims, characterized in that the wall projections (8) and the wall recesses (8 ') in a direction perpendicular to the bottom (5) has a smaller Anchoring resistance in concrete as in a deviating direction.

10. Connecting device according to claim 9, characterized in that the wall projections (8) and the wall recesses (8 ') have an elongated shape which extends substantially perpendicular to the bottom (5) and preferably in the away from the bottom (5) Direction rejuvenated.

11. Connecting device according to one of the preceding claims, characterized in that the bottom projections (7) and the bottom recesses (7 ') or the wall projections (8) and the wall recesses (8') of adjacent groups by a narrow intermediate surface

(13) are separated or merge directly.

12. Connecting device according to one of the preceding

Claims, characterized in that the storage boxes (2), in particular the width of the bottom (5), the height and / or inclination of the side walls (6) is designed such that two opposite storage boxes (2) of interconnected concrete components ( 20) form the smallest possible Vergussfuge (4), which can accommodate the respective flexible reinforcement loop elements (3) in the unfolded state including a tolerance field.