EP1887155B1 - Thermal insulation element - Google Patents

Abstract

Thermal insulating component (1) comprises a pulling section (10), an advancing section (11), a transition section (12) and a pressure section (13) formed as one piece from a bent reinforced rod. Preferred Features: A free end of the pressure section is provided with a pressure plate (15). The pulling section and/or the pressure section run in the horizontal direction. An additional pressure anchor is provided.

Description

The invention relates to a thermally insulating component having the features according to the preamble of claim 1.

When building buildings, it is often necessary to connect two load-bearing building parts such as floor or ceiling slabs or other, especially flat and flat components together. Such structural parts, in particular cast concrete on site are connected to each other via cast-in reinforcement elements. In certain circumstances, in particular in a connection between the outside and inside of the building, a thermal and acoustic insulation between the two components may be required beyond.

In particular, for the connection of a balcony floor slab with a building ceiling prefabricated, thermally insulating components are used, which are arranged in a parting line between, the two load-bearing parts of the building. The thermally insulating component comprises an insulating body, which fills in the assembled state, the parting line, and by the pre-assembled state reinforcing elements are passed transversely to the parting line. Such a thermally insulating component has a tensile zone and a pressure zone, based on the weight force load acting in the installed position, and is dimensioned to accommodate bending and shear loads.

In the factory pre-assembly of such a thermally insulating component is to produce a plurality of reinforcing elements and to connect in a suitable manner with the insulating body. Shaping and spatial arrangement of the reinforcing elements should be chosen such that, in the molded state, they can absorb the pressure, bending and shear loads acting in the parting line. After pre-assembly with the insulator, the reinforcing elements are fixed in position. The result is a pre-assembled assembly, which is brought as a unit at the site in position and cast with in-situ concrete.

The protruding laterally beyond the insulating reinforcing elements are bulky and complicate storage, transport and handling of the thermally insulating component. Shaping and positioning of the reinforcement elements are complex and costly during production and pre-assembly.

From the DE 296 15 018 U1 is a generic thermally insulating component, known in which reinforcing elements are passed through an insulating body and are dimensioned to accommodate bending and thrust loads. In the tension zone a tie rod is arranged. A diagonal with a pulling section and with a pushing section is in the area a pressure plate connected to a pressure anchor. The aforementioned components together form a multi-part combined push-push armature, which is elaborately constructed and requires a cost-intensive production. document DE 296 15018 U1 describes a thermally insulating component according to the preamble of claim 1.

The invention has the object of developing a generic thermal insulating component such that a simplified production and improved handling is given.

This object is achieved by a thermally insulating component having the features of claim 1.

For this purpose, a thermally insulating component is proposed in which a first reinforcing element is designed as arranged in the tension zone tie rods, and in which a second reinforcing element is designed as a combined thrust-pressure anchor with a tensile section, a thrust section, a transition section and a pressure section. The aforementioned sections of the combined thrust-pressure armature merge into one another and are integrally formed from a bent reinforcing bar.

The tension section is arranged in the tension zone on a side of the insulating body facing the first structural part. The thrust section is passed from the train section diagonally through the insulating body through to the pressure zone of the opposite second structural part and adjacent to the transition section arranged there. Starting from the transition section in the pressure zone, the pressure section is guided through the insulating body and back to the side of the first structural part. Under the influence of the weight force, a combined bending and pushing load is created in the area of the parting line. Under the influence of the bending load, a tensile zone with tensile stresses acting there, and with reference to the installation position in the vertical direction, forms below a pressure zone with compressive stresses acting there in the joint area. At the same time, the joint area is subject to a transverse force or shear stress. In the component according to the invention, the acting bending and transverse force stresses are absorbed by only two different types of reinforcing elements: The tensile anchor arranged in the tensile zone carries the tensile stresses resulting from the bending stress, while the compressive stress resulting from the bending stress and the shear stress resulting from the acting transverse force by the Combined thrust-pressure anchor can be added. The force acting, for example, on the freely projecting balcony floor plate transverse force and resulting from the Kragmoment compressive stress is introduced into the there concreted transition section. The proportionate pressure load is passed directly by means of the pressure section through the insulating body to the pressure zone of the opposite building part. The transverse force also acting on the transition section generates in the diagonal thrust section a tensile force which continues in the adjoining train section and is received in the tension zone of the adjacent building section.

With a small number of parts, a high load capacity is achieved. Only the two ends of the continuous tie rod and the tensile portion of the combined push-pressure armature must protrude by a longer amount beyond the contour of the insulating body, while the transition section and the pressure section of the combined thrust-pressure armature require only a small projection size for a good force introduction. The inventively embodied thermal insulating component is more compact and easier to use. During transport and storage, less space is required.

The transition section still has a pressure plate and a transverse force plate. The pressure plate and the transverse force plate are preferably formed in one piece as a bent sheet metal. Such a sheet can be produced at low cost and can be readily welded to the transition section made of a bent reinforcing bar. The planar shape of the pressure or transverse force plate leads under the action of the pressure and shear forces to a comparatively low surface pressure between the respective plate and the surrounding concrete. Even with low penetration depth a good power transmission is ensured.

In a preferred embodiment, a free end of the printing section is provided with a pressure plate. The acting compressive stresses can be introduced over the pressure plate into the adjoining part of the building. For the printing section, only a slight projection over the insulating body or a small penetration depth into the adjacent structural part is required.
The tension section and / or the pressure section of the combined thrust-pressure armature advantageously extend horizontally relative to the intended installation position. They are thus over their entire Length parallel to the acting tensile and compressive forces. The orientation in the direction of loading increases the load capacity.

The thrust section runs at an angle to the horizontal with respect to the intended installation position, the angle advantageously being in a range of 30 ° inclusive and 60 ° inclusive and preferably about 30 °. Here a good compromise between load capacity, construction volume and manufacturing effort is found.

In a preferred development, in addition to the two aforementioned types of reinforcing elements, a third reinforcing element in the form of a pressure anchor is provided. In particular, an equal number of tie rods and pressure anchors is appropriate. The loads resulting from bending and shear force are distributed: tensile and compressive stresses in the tensile and compressive zones resulting from the bending load are absorbed by the tensile and pressure anchors, while the transverse force load is transferred to the transitional section of the combined thrust-pressure Ankers introduced and implemented there in tensile and compressive loads of the tension section or the pressure section. The stress on the individual reinforcement elements is evenly distributed. The material and weight insert is optimized.

Fig. 1

eine perspektivische Ansicht eines erfindungsgemäß ausgeführten thermisch isolierenden Bauelementes mit einem Isolierkörper und einer Anzahl von Zugankern, Schub-Druck-Ankern sowie Druckankern;

Fig. 2

eine perspektivische Ansicht der Anordnung nach Fig. 1 von ihrer gegenüberliegenden Seite aus mit weiteren Einzelheiten zur Ausbildung der kombinierten Schub-Druck-Anker;

Fig. 3

eine vergrößerte Detaildarstellung der Anordnung nach Fig. 2 mit Einzelheiten zur geometrischen Ausgestaltung des kombinierten Schub-Druck-Ankers;

Fig. 4

eine teilweise geschnittene Querschnittsdarstellung des in zwei Bauwerksteilen eingegossenen thermisch isolierenden Bauelementes nach den Fig. 1 bis 3 mit Angaben zu den im Fugenbereich wirkenden Belastungen.

An embodiment of the invention is described below with reference to the drawing. Show it:

Fig. 1

a perspective view of an inventively designed thermally insulating component with an insulating body and a number of tie rods, thrust-pressure anchors and pressure anchors;

Fig. 2

a perspective view of the arrangement according to Fig. 1 from its opposite side with further details for the formation of the combined thrust-pressure armature;

Fig. 3

an enlarged detail of the arrangement according to Fig. 2 with details of the geometric design of the combined thrust-pressure armature;

Fig. 4

a partially sectioned cross-sectional view of the cast in two parts of the building thermal insulating component according to the Fig. 1 to 3 with information on the loads acting in the joint area.

Fig. 1 shows a perspective view of an inventively designed thermally insulating component 1, comprising an approximately cuboid insulating body 5 and a number of tie rods 8, combined thrust-pressure anchors 9 and pressure anchors 18 as reinforcing elements. In the illustrated embodiment, a total of five tie rods 8 are provided, each of which a combined thrust-pressure armature 9 and a pressure armature 18 is assigned. The thermally insulating component 1 can also be made narrower or wider with a small or larger number of reinforcing elements and with a different distribution ratio of the reinforcing elements.

The thermally insulating component 1 is provided for use in a parting line 2 between a first, load-bearing, not shown here structural part 3 and a second, also not shown load-bearing structural part 4. The thermally insulating component 1 with the insulating body 5 and the reinforcing elements is in the configuration according to Fig. 1 Completely prepared at the factory and transported to the construction site. There it is so cast with the formation of the parting line 2 with in-situ concrete of the two structural parts 3, 4, that the laterally projecting over the insulator 5 sections of the reinforcing elements in the concrete of the building parts 3, 4 are poured, wherein the thermal insulator 5, the parting line 2 between the two building parts 3, 4 fills. Further details are related below Fig. 4 described in more detail.

The perspective view Fig. 1 It can be seen that the tie rods 8 are passed straight through the insulating body 5 and projecting on both sides of the insulating body 5. The same applies to the pressure anchor 18. The combined thrust-pressure armature 9 are also passed through the insulating body 5, wherein a transition portion 12 of the combined thrust-pressure armature 9 projects beyond the front side of the insulating body 5 shown here.

Fig. 2 shows a perspective view of the thermally insulating component 1 after Fig. 1 from its opposite side. On this side of the insulating body 5 are each a tensile section 10 and a pressure section 13 of the respective Thrust-pressure armature 9 on the front side of the insulating body 5 shown here.

Details of the arrangement according to Fig. 2 are in the enlarged detail after Fig. 3 shown. It can be seen that the tie rod 8 and the pressure anchor 18 are each guided straight through the insulating body 5 and projecting on both sides. The tie rod 8 comprises a continuous by the insulating body 5, factory-inserted sleeve 27 which protrudes only slightly in the longitudinal direction of the insulating body 5. Two tension rods 28 are inserted on both sides of the sleeve 27 and factory-pressed with her. It may also be a weld or the like. Expedient. From the sleeve 27 and the two tension rods 28 of the tie rod 8 is formed with the required length. In addition, the continuous pressure armature 18 is provided at its two free, protruding ends, each with a circular pressure plate 20 whose plate plane is parallel to the end face of the insulating body 5.

The combined thrust-pressure armature 9 comprises the tension section 10, a thrust section 11, the transition section 12 and the pressure section 13, which merge into one another and are connected to one another. The pulling portion 10, the pushing portion 11, the transition portion 12 and the pressure portion 13 are integrally formed of a bent reinforcing bar having a circular cross section. The pressure section 13 is at its free, projecting beyond the end face of the insulating body 5 End 14 provided with a pressure plate 15 which is identical to the pressure plates 20 of the pressure armature 18 and arranged lying parallel to it. On the opposite, also over the associated end face of the insulating 5 projecting and bent transition portion 12 a bent plate 19 is guided around the outside of the bend of the transition section 12 and welded thereto. The function of the sheet 19 is related below Fig. 4 explained in more detail.

Fig. 4 shows a cross-sectional view of the thermally insulating component 1 according to the Fig. 1 to 3 in the assembled state. It can be seen that between two load-absorbing, designed essentially as flat plates structural parts 3, 4, a parting line 2 remains, which is at least approximately completely filled by the insulating body 5 of the thermally insulating component 1. The thermally insulating component 1 and the two structural parts 3, 4 are shown in the intended installation position, thus the flat structural parts 3, 4 transverse to a direction indicated by an arrow 21 vertical or weight force direction and thereby in a direction indicated by a double arrow 23 horizontal direction extend. The protruding in the horizontal direction 23 portions of the tie rod 8, the combined thrust-pressure armature 9 and the in Fig. 3 Pressure anchor 18 shown in detail are cast in the concrete material of the two building parts 3, 4.

In the illustrated embodiment, the first building part 3 is a poured building ceiling, the static point of view is firmly clamped in the building. In the horizontal direction 23 is followed by a balcony floor plate as a second load-bearing structural part 4, which projects freely over. The weight force acting in the direction of the weight force 21 on the second structural part 4 generates in the region of the parting line 2 a bending moment indicated by an arrow 22, which in relation to the weighting direction 21 in the upper region of the structural parts 3, 4 is a tension zone 6 and in the opposite, lower region of the two Building parts 3, 4 forms a pressure zone 7. In the tension zone 6 tensile forces prevail, which are indicated by arrows 24, while in the pressure zone 7 indicated by arrows 25 pressure forces each act in the horizontal direction 23. In addition, acting in the region of the parting line 2 indicated by an arrow 26 transverse forces, which also follows from the weight load of the second structural part 4 in the direction of gravity 21 and is parallel to this.

The tie rod 8 is arranged in the tension zone 6. He runs there rectilinearly parallel to the horizontal direction 23 and parallel to the tensile forces acting there 24 and is poured with both over the insulator 5 projecting ends in the concrete of the two building parts 3, 4. The tie rod 8 transmits the tensile forces 24 between the structural parts 3, 4 in the tension zone 6 and thus absorbs a first part of the stresses resulting from the bending moment 22.

The pressure anchor 18 is parallel to the tie rod 8 and is arranged in the pressure zone 7. Its longitudinal axis is parallel to the horizontal direction 23 and to the direction of the acting there Pressure forces 25. A portion of the compressive forces 25 and thus a part of the bending moment 22 resulting stresses is absorbed by the pressure anchor 18, wherein the introduction of force of the pressure forces 25 in the pressure armature 18 primarily on the end faces of the two pressure plates 20 (FIGS. Fig. 3 ) he follows. The introduction of force of the tensile forces 24 on the tie rod 8, however, takes place primarily on the outer or peripheral surfaces of the tie rod 8, which protrude compared to the pressure anchor 18 over a much greater length in the building parts 3, 4 and are embedded in concrete.

Another reinforcing element is formed by the combined thrust-pressure armature 9, the tension section 10 is arranged in the tension zone 6 on a first structural part 3 facing side of the insulating body 5. Starting from the traction section 10, but still within the first structural part 3, the thrust section 11 adjoins, which is bent at an angle α to the horizontal direction 23 and to the longitudinal axis of the traction section 10. It extends from the tension zone 6 of the first building part 3 diagonally through the insulating body 5 and ends in the pressure zone 7 of the opposite second structural part 4. There he goes into the transition section 12, which is arranged in the pressure zone 7 of the second building part 4 and concreted there is. From the transition section 12 of the printing section 13 goes out. It lies completely in the pressure zone 7 and parallel to the horizontal direction 23 or parallel to the compressive forces 25 acting there. The pressure section 13 extends from the second structural part 4 through the insulating body 5 into the first structural part 3, where it is in the region of its free end 14 concreted is. The tension section 10 and the pressure section 13 both run parallel to the horizontal direction 23 or to the direction of the tensile forces 24 and compressive forces 25 in the installation position shown here.

The curved and externally guided around the curved transition section 12 sheet 19 forms in a transversely to the applied compressive force 25 area a pressure plate 16 and integrally therewith in angled, at least partially transverse to the transverse force acting 26 transverse force plates 17. The acting in the second building part 4 Transverse force 26 acts on the transverse force plates 17 of the transition section 12, while the pressure force 25 acting there acts on the pressure plate 16 of the transition section 12. Accordingly, both a portion of the compressive forces 25 and a portion of the transverse forces 26 are introduced into the transition section 12.

The introduced into the transition section 12 transverse force 26 is converted in the diagonal thrust section 11 in a tensile force acting there. For as complete a conversion as possible into tensile force, a range of the angle α of 30 ° inclusive up to and including 60 ° is expedient. From a static point of view, ideally it is 45 °. In the illustrated embodiment, the angle α is selected at about 30 ° as a compromise between existing volume and carrying capacity. In particular, the angle α is in a range of from 30 ° to 45 ° inclusive. The tensile stress forming in the pushing section 11 becomes the pulling section 10 introduced and transmitted there according to the arrow 24 as a tensile force on the first building part 3.

The introduced into the transition section 12 transverse force 26 further leads to a compressive stress of the pressure section 13, which adds to the pressure forces 25 in the pressure zone 7. Starting from the transition section 12, this compressive stress is introduced by the pressure section 13 in the pressure zone 7 of the first building part 3 and transmitted primarily over the end face of the arranged at the free end 14 pressure plate 15 according to the arrow 25. The formation of the free end 14 of the pressure section 13 with the pressure plate 15 and the formation of the transition section 12 with the pressure plate 16 and the transverse force plates 17 makes it possible that the free end 14 of the pressure section 13 and the transition section 12 each with only a small amount on the projecting end faces of the insulating 5 project and project into the respectively associated building part 3, 4, wherein the aforementioned lateral projection is significantly lower than the projection of the tensile section 10 from the thrust-pressure armature 9 and the protruding portions of the tie rod 8. In addition, the Pressure armature 18 is formed in its laterally projecting region identical to the region of the free end 14 of the pressure section 13 and protrudes by the same amount in each case over the two structural parts 3, 4 facing side or end faces.

Claims (7)

1. A thermal insulation element (1) for use in expansion joints (2) between a first and a second load-bearing structural part (3, 4), in particular between a building floor and a balcony floor slab, having an insulating body (5) through which reinforcing elements pass at right angles to the expansion joint (2), the element (1) having a tensile force zone (6) and a pressure force zone (7) in terms of the weight load exerted in the fitted position and being dimensioned to take bending loads and shear loads, a first reinforcing element being designed as a tension rod (8) positioned in the tensile force zone (6), a second reinforcing element being designed as a combined shear/pressure rod (9) having a tension section (10), a shear section (11), a transition section (12) and a pressure section (13), the tension section (10) being positioned on a side of the insulating body facing the first structural part (3), the shear section (11) running from the tension section (10) essentially diagonally through the insulating body (5) to the pressure force zone (7) of the opposite second structural part (4) and abutting the transition section (12) positioned there, and the pressure section (13) running from the transition section (12) in the pressure force zone (7) through the insulating body (5) back to the side of the first structural part (3),
   characterised in that
   the tension section (10), the shear section (11), the transition section (12) and the pressure section (13) together forming one curved reinforcing rod, the transition section (12) having a pressure plate (16) and a transverse force plate (17).
2. An element in accordance with claim 1,
   characterised in that
   a free end (14) of the pressure section (13) is provided with a pressure disc (15).
3. An element in accordance with claim 1 or 2,
   characterised i n that
   the pressure plate (16) and the transverse force plate (17) are designed in one piece as a curved plate.
4. An element in accordance with one of claims 1 to 3,
   characterised in that
   the tension section (10) and/or the pressure section (13) runs horizontally in relation to the planned fitting position.
5. An element in accordance with one of claims 1 to 4,
   characterised in that
   the shear section (11) runs at an angle (α) to the horizontal in relation to the planned fitting position, said angle (α) lying within a range of 30° to 60° inclusive.
6. An element in accordance with one of claims 1 to 5,
   characterised in that
   an additional pressure rod (18) is provided
7. An element in accordance with claim 6,
   characterised in that
   identical numbers of tension rods (8) and pressure rods (18) are provided.

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