EP2080841B1 - Cantilever plate connecting element - Google Patents

Description

The present invention relates to a heat-insulating cantilever connection element, with an insulation body and at least one thrust plate, according to the preamble of claim 1.

Heat-insulating cantilever connection elements have been known since the early 1980s. By insulating Kragplattenanschlusselemente over the building body projecting plates are connected to the building. Usually, both the bottom cover plate and the cantilever plate each have a lower and an upper reinforcing mesh and the Kragplattenanschlusselemente connect these networks across the joint between these two plates. For this purpose, the known Kragplattenanschlusselemente upper tie rods and lower pressure bars. The tension rods and the pressure rods pass through the insulation body.

For example, shows the already EP 0 034 332 Such Kragplattenanschlusselement. However, only the tension rod is designed as a rod, while instead of the pressure rod, a pressure element in the lower region passes through the insulation body. In addition, a transverse force rod is provided for receiving the transverse forces, by means of which the transverse forces or shear forces are taken over.

When using transverse force bars, the installation position of the cantilevered connection element is exactly defined. Incorrect installation will result in damage. To avoid this, shows the EP 0 119 165 a Kragplattenanschlusselement in which the tension and compression bars are designed as closed loops so as to achieve a symmetrical arrangement and absorb the transverse forces through the closed system of loops without this special shear force rods are required.

A completely different concept, however, shows the EP 0 499 590 , Here, the tension and compression rods are passed through the insulation body, while distanced to, between two adjacent upper Zugstäben and lower pressure rods, each a thrust plate is integrated. This thrust plate takes over the transfer of the shear forces and it protrudes on both sides, on the one hand in the ground cover plate and on the other hand into the cantilever. The thrust plates are mutually parallel by transverse bars Longitudinal direction of the insulating body running connected to each other. Optionally, finally, the ends of the tension rods and pressure rods are connected to each other via so-called end plates to achieve the required strength. However, these end plates are not required statically but facilitate and only increase the strength of the cantilever plate connection element in its. Due to the large number of different rods and thrust plates which must be guided through the insulation body, the production of such cantilever panel connection element is expensive.

By the same applicant, this cantilever panel connection element has been slightly improved by additionally simplifying the tension bars and pressure bars by means of welded-on transverse bars running parallel to the longitudinal direction of the insulating body so as to avoid the end plates. This solution is in the CH 689,231 disclosed.

It was recognized that it makes little sense to keep the tie rods and push rods spaced from the push plates separately through the insulator body. Accordingly, in the EP 0 822 299 proposed to weld the tension rods and the pressure rods along the upper or lower longitudinal edge of the thrust plate, which could be met with much less effort all static conditions.

All these solutions form optimizations to fulfill the same static conditions. Of course, compromises must be made. So it is of course advantageous if the height of the thrust plate can be designed as maximum as possible. In the latter solution according to the EP 0 822 299 However, if this is only possible to a limited extent, since the tension rods or pressure rods run along the upper edges of the thrust plate, this automatically influences that the height of the thrust plate corresponds at most to the distance between tension rods and pressure rods. This height is dictated by the concrete body and is much smaller than the thickness of the cantilever plate or the floor cover plate, since both the tension bars and the pressure bars require a specified minimum concrete coverage.

Furthermore, from the WO 00/47834 A1 a cantilever connection element according to the preamble of claim 1 known. Here the push plate is bent as a three-dimensional reinforcement profile. U-shaped brackets are welded to this profile, their parallel legs being welded to the reinforcement profile.

The integration of both the tension and compression rods and the thrust plate in the insulation body is problematic, especially since the diameter of the tension and compression rods is greater than the thickness of the thrust plate. An insertion of these elements in the insulating body, requires that appropriate recesses are mounted in these. This leaves columns through which often certain amounts of concrete can penetrate and thus undesirable side effects can occur.

It is therefore the object of the present invention to provide a heat-insulating cantilever connection element, which is more optimally adapted to the circumstances and with the corresponding higher cross-sections of the tension and compression rods higher forces can be transmitted.

This object is achieved by a heat-insulating cantilever connection element, which has the features of claim 1.

Figur 1:

eine erste Ausführungsform des erfindungsgemässem Kragplattenanschlusselementes in einem Vertikalschnitt im eingebauten Zustand.

Figur 2:

zeigt einen Teilabschnitt des erfindungsgemässen Kragplattenanschlusselementes in der Aufsicht von oben im nicht eingebauten Zustand und

Figur 3:

ein alternativ ausgestaltetes ebenfalls erfindungsgemässes Kragplattenanschlusselement wiederum in einem Vertikalschnitt.

In the drawing, a preferred embodiment of the subject invention is shown in simplified form and explained with reference to the following description. It shows:

FIG. 1:

a first embodiment of the invention Kragplattenanschlusselementes in a vertical section in the installed state.

FIG. 2:

shows a portion of the inventive Kragplattenanschlusselementes in the top view from above in the non-installed state and

FIG. 3:

an alternatively configured also according to the invention Kragplattenanschlusselement in turn in a vertical section.

In the drawing, the cantilever connection element is designated overall by 1. The element comprises a heat insulation board or an insulation body 2 whose height corresponds to the thickness of the ground cover plate or the cantilever plate. The bottom cover plate, which of course is not part of the invention, is designated 10. In alignment continuation of the bottom cover plate 10 extends the cantilever 20. Between the bottom cover plate 10 and the cantilever 20 extends the joint 30. The joint 30 thus determines the dimension of the insulating body 2. This insulating body 2 is usually made of the known thermal insulation materials. In particular, glass wool, rock wool and foamed plastic materials come into question and are available on the market as plates of different thicknesses.

The statically relevant parts of the Kragplattenanschlusselementes consist of the thrust plates 3, which are arranged perpendicular to the direction of the joint and thus also perpendicular to the longitudinal axis A of the insulating body 2. The thrust plates 3 are arranged mutually parallel and extending at regular intervals. Preferably, these thrust plates 3 will be made of stainless steel. Of course, it is also possible to produce the plates of a standard structural steel and to provide with a corrosion inhibitor. The push plates are Preferably absolutely flat and have in the embodiment according to the Figures 1 and 2 a rectangular basic shape. The upper and lower horizontal edges end approximately at the level of the upper Armierungsnetze 11 in the bottom cover plate 10 and at the height of the upper Armierungsnetze 21 in the cantilever 20 and at the bottom of the lower Armierungsnetze 12 and 22 in the bottom cover plate 10 and the cantilever 20th In principle, however, this relation is not mandatory. The pusher plate can also be made higher or less high than shown and described here.

The width of the thrust plate 3 corresponds at least to the thickness of the insulating body, but it is preferably longer and therefore protrudes on both sides of the insulating body 2 addition. The supernatant of the thrust plate 3 is denoted by 5. This supernatant 5 is chosen so that it corresponds to at least the minimum coverage of the reinforcement. Normally, this corresponds to at least 10 to a maximum of 30 millimeters.

The vertical end faces of the thrust plate 3 are denoted by 7. At these vertical end faces 7 bracket 6 are welded. These brackets 6 are U-shaped. The brackets 6 have upper legs 60 and lower legs 61, which are parallel to each other and connected to each other via a connecting piece 62. According to the version in the Figures 1 and 2 is shown is this connector 62 is straight and is firmly connected over its entire length or a partial length via a weld 8 with the end face 7 of the thrust plate 3. The length of the weld or the weld 8 must be at least the statically required length. This is a normal strength calculation for the person skilled in the art. For small dimensions, the weld will run virtually over the entire length of the connecting piece 62, while in Kragplattenanschlusselemente for thick cantilevers only in the upper and lower weld seams, each with a length of for example 20 - 60 mm suffice. At the top of the upper leg 60, the upper reinforcing mesh 21 is laid resting while the lower leg 61 rests on a lower reinforcing mesh 22. These top nets 11, 21 in the bottom cover plate 10 and cantilever 20 are connected to each other with appropriate Abbinddrähten on site. The type of installation shown here is one possible way of laying, but not the most common one. More often, the Kragplattenanschlusselemente be laid first and then the Armierungsnetze 21, 22 laid. It is more common to place the lower reinforcement net 22 on the upper side of the lower legs 61, while the upper reinforcing mesh 21 is placed under the upper legs 60 of the bracket 6. In this way of laying the wires of the nets come parallel to the legs 60 and 61, respectively are in the same plane and would therefore not be visible.

The upper leg 60 of all the bracket 6 and the lower leg 61 can also be connected to each other by means of a welded transverse bar 9. These cross bars 9 are not necessarily part of the cantilever plate connection elements for static reasons. The cross bars 9 serve only to increase the strength of the cantilever panel connection element itself and increases their handling during transport. In addition, these cross bars for connecting the already mentioned networks 11, 21 and 12, 22 serve. For the same purpose, a transverse bar 9 'can also be welded on the connecting piece 62. As a result, the thrust plates 3 are not only connected by the insulating body 2 relative to each other but also by these cross bars 9 and 9 'whereby the whole Kragplattenanschlusselement 1 receives increased strength.

In the FIG. 3 an alternative of the invention Kragplattenanschlusselementes is shown. The Kragplattenanschlusselement 1 is in turn provided with an insulating body 2 and through this insulating body 2 extend transversely to the longitudinal extent and thus perpendicular to the joint longitudinal direction turn the thrust plates 3. At the thrust plates 3 are in the plane which spans the thrust plate on both sides again arranged bracket 6.

Although these brackets 6 are again U-shaped, but in contrast to the example described above, the connecting pieces 62 extend in a semicircle. The vertical end faces 7 are cut corresponding curved in the same radius. The weld 8 follows according to this curvature. The thrust plate 3 is in this version slightly higher than the distance between the two parallel legs 60 and 61. However, this is not mandatory and the height of the thrust plate 3 may also be less than the distance between the legs 60 and 61 of the bracket 6. Again, here by means of transverse rods 9, the connecting pieces 62 and thus the bracket 6 connected to each other. In the choice of this embodiment, larger bending radii are realized and according to the bracket 6 can be used as a reinforcing bar with a much larger cross-section, so that correspondingly high static forces can be transmitted.

Both in this solution and in the solution described above, the upper leg 60 and the lower leg 61 can be made by appropriate choice of the height of the thrust plate 3 so that the horizontal edge 4 with the corresponding top of the upper leg 60 and with the lowermost Edge of the lower legs 61 are aligned.

Purely statically speaking, the thrust plate could only be the same length as the thickness of the insulating plate be. In the embodiment selected here, however, the thrust plate protrudes on both sides of the insulating body 2 and in the installed state now protrudes the corresponding supernatant 5 in the adjacent cantilever plate 20 on the one hand and in the adjacent Bodendeckenkante the other. This ensures that the welded area is completely covered by the concrete and thus is not exposed to the environment. This is not feasible in solutions in which corresponding tension rods and pressure rods, which are welded to the upper edges or lower edges of the thrust plates, not feasible.

Another advantage of the inventive solution is also that the joint gap traverses remain only the thrust plates and not additionally traverse the tension and compression rods this joint gap and accordingly the heat conduction is minimized.

Of course, the U-shaped stirrups again form tension rods and pressure rods in static terms. The forces run as a closed system directly through the thrust plate. In addition, the transverse force is transmitted via the thrust plates. Separate diagonal transverse force bars are not required. Thanks to the symmetrical design of the inventive Kragplattenanschlusselementes this is with respect to the installation no directional.

LIST OF REFERENCE NUMBERS

1

cantilever panel

2

insulation body

3

pusher plate

4

Horizontal edges

5

Got over

6

hanger

7

Vertical frontal

8th

Weld

9

cross bar

10

Ground floor slab

11

Reinforcement nets above

12

Reinforcing nets below

20

cantilever plate

21

Reinforcing net above

22

Reinforcing net below

30

Gap

60

upper leg

61

lower thigh

62

joint

Claims (8)

1. A heat-insulating cantilever plate connecting element (1), having an insulating body (2) and at least one push plate (3) which penetrates the insulating body (2) and runs perpendicular to the longitudinal extension thereof, wherein the push plate (3) is at least as long as the insulating body (2) is wide and U-shaped brackets (6) are welded thereto, characterized in that a U-shaped bracket (6) made of reinforced steel is attached to each of the two vertical face ends (7) of the push plate (3) which run on the plane formed by the push plate (3), wherein the parallel legs (60, 61) thereof project away from the push plate (3) and the connecting pieces (62) between the two legs (60, 61) of the respective bracket (6) are welded at least over the statically required length to the push plate (3) on the vertical front face (7) thereof.
2. The cantilever plate connecting element (1) according to claim 1, characterized in that the connecting pieces (62) between the two legs (60, 61) of the bracket (6) run substantially straight.
3. The cantilever plate connecting element (1) according to claim 1, characterized in that the connecting pieces (62) between the two legs (60, 61) of the bracket (6) run substantially in a semicircle and the vertical face ends (7) of the push plates (3) are cut out in the form of a diametrically opposed semicircle.
4. The cantilever plate connecting element (1) according to claim 1, characterized in that the space between the parallel legs (60, 61) is measured such that the uppermost leg lines of the upper legs (60) and the lowermost leg lines of the lower legs (61) of the bracket (6) produced from corrugated reinforced steel are flush with the upper edge or else the lower horizontal edge (4) of the push plate (3).
5. The cantilever plate connecting element (1) according to claim 1, characterized in that a plurality of push plates (3) are present which are parallel and arranged at uniform distances to one another and that the upper legs (60) of the bracket (6) with cross bars (9) running parallel to the longitudinal direction of the insulation body (2) are connected to one another.
6. The cantilever plate connecting element (1) according to claim 1 or 5, characterized in that a plurality of push plates (3) are present which are arranged parallel and at equal distances to one another and that the lower legs (61) of the bracket (6) with cross bars (9) running parallel to the longitudinal direction of the insulation body (2) are connected to one another.
7. The cantilever plate connecting element (1) according to claim 1, characterized in that the brackets (6) are made from corrugated reinforced steel, the diameter of which is greater than the thickness of the push plate (3).
8. The cantilever plate connecting element (1) according to claim 1, characterized in that the push plate (3) projects from the insulation body (2) on both sides and in the assembled state projects inwards in the adjacent cantilever plate (20), on the one hand, and the adjacent floor-covering plate (10), on the other.

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