EP1889980B1 - Thermally insulating construction element - Google Patents

Abstract

The thermal insulating component (1) has a tension area (6) and a pressure area (7) and a moving element in the tension area as tension anchor (8). Another moving element is provided as compression anchor (9) with two tension sections (10,14), two compression sections (11,13) and a transition section (12). A third moving element is provided in the pressure area as compression anchor (15). The former compression section is guided diagonally through an insulation body (5) to the pressure area of the opposite latter tension section. The latter compression section is guided diagonally through the insulation body back to the former construction element in the tension area and passes over in the latter tension section.

Description

The invention relates to a thermally insulating component for use in joints between two load-bearing structural parts.

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 finished prefabricated, thermally insulating components are used, which are arranged in a parting line between the two load-bearing building parts. The thermally insulating component comprises an insulating body, which in the assembled state, the parting line fills, and through 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 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 placed as an item 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.

Such a thermally insulating component is known from EP 0 947 640 A2 known. In the tension zone arranged tie rods and arranged in the pressure zone pressure anchor take the forces acting in the parting line, resulting from the bending moment of the overhanging structure part longitudinal forces. Another one Reinforcement element is looped to form a push armature. The loop-shaped bent portion lies in the tension zone, while the free ends are guided diagonally through the insulating body with the formation of thrust sections and are welded to the pressure anchor opposite in the pressure zone. On the side of the overhanging structural part, the acting transverse forces are first transferred to the pressure anchor and from there to the shear sections of the shear anchor. A similar arrangement is still out of the DE 299 05 985 U1 known. In both cases, the pressure anchor is subject to an additional load resulting from the transverse force and must be dimensioned correspondingly strong. It is a sufficient volume of construction required. The connection of the push armature with the pressure anchor is expensive.

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 rod, in which a second reinforcing element is designed as a push armature with two tensile sections, two thrust sections and a transition section and in which a third reinforcing element than in the pressure zone arranged pressure anchor is executed. The aforementioned sections of the push armature are frictionally engaged in one another and are advantageously formed in one piece from a bent reinforcing bar.

The two tension sections of the push armature are arranged in the tension zone on a side of the insulating body facing the first structural part. Starting from the first pulling section, the first pushing section is led diagonally through the insulating body to the pressure zone of the opposite second building section and adjoins the transition section arranged there. Starting from the transition section, the second thrust section is led diagonally through the insulating body back to the side of the first structural part into the local tension zone, where it merges into the second traction section.

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 forms in the joint area with tensile stresses acting there and in the vertical direction opposite a pressure zone with there acting compressive stresses. At the same time, the joint area is subject to a transverse force or shear stress.

In the embodiment according to the invention, the acting bending and transverse force loads are absorbed by three different types of reinforcing elements: The tension anchor arranged in the tension zone carries the tensile stresses resulting from the bending load, while the compressive stress resulting from the bending stress is absorbed by the pressure anchor in the pressure zone. The shear stress resulting from the acting shear force is absorbed by the thrust armature. The acting, for example, on the freely overhanging balcony floor plate transverse force is introduced into the there concreted transition section. It generates in the diagonally extending thrust portion a tensile force which continues in the adjoining train section and is received in the tension zone of the adjacent first building part.

With a small number of parts, a high load capacity is achieved with reduced dimensions. Only the two ends of the continuous tie rod and the two tensile sections of the push armature must protrude by a longer amount over the contour of the insulating body. The transition section of the push armature and the pressure anchor require only a slight projection for good force transmission. The inventively embodied thermal insulating component is more compact and easier to use. During transport and storage, less space is required.

The train sections of the push 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 extends 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 45 °. Here a good compromise between load capacity, construction volume and manufacturing effort is found.

The thrust armature is advantageously constructed with mirror symmetry relative to the lateral direction of the component. Its various sections are evenly loaded while avoiding eccentricities and asymmetries. In a preferred embodiment, an equal number of tie rods and pressure anchors is appropriate. The stress on the individual reinforcement elements is evenly distributed. The material and weight insert is optimized.

In a preferred embodiment, a free end of the pressure anchor and in particular its two ends are 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 transition section of the thrust armature advantageously spans arcuately the adjacent free end of the pressure anchor. The introduction of force into the transition section of the push armature and into the pressure anchor takes place almost in the same place. This can be moved far into the pressure zone in relation to the transverse force direction, resulting in an optimum ratio of the load to the required reinforcement cross-sections.

Fig. 1

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

Fig. 2

eine vergrößerte Detaildarstellung der Anordnung nach Fig. 1 mit Einzelheiten zur geometrischen Ausgestaltung des Schubankers in Kombination mit je einem Zuganker und einem Druckanker;

Fig. 3

eine Variante der Anordnung nach Fig. 2 mit einem Schubanker in Kombination mit je zwei Zugankern und zwei Druckankern;

Fig. 4

eine teilweise geschnittene Querschnittsdarstellung des in zwei Bauwerksteilen eingegossenen thermisch isolierenden Bauelementes nach den Fig. 1 und 2 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 with a number of tensile, shear and pressure anchors;

Fig. 2

an enlarged detail of the arrangement according to Fig. 1 with details of the geometric design of the push armature in combination with a tie rod and a pressure anchor;

Fig. 3

a variant of the arrangement according to Fig. 2 with a push anchor in combination with two tie rods and two pressure anchors;

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 and 2 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 distributed in a lateral direction 18 of the thermally insulating component 1 tie rods 8, thrusters 9 and pressure anchors 15 as reinforcing elements. In the illustrated embodiment, a total of five tie rods 8 are provided, each of which a push armature 9 and a pressure anchor 15 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 under 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 cast, wherein the thermal insulator 5, the parting line 2 between the both parts of the structure 3, 4 fills out. 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 15. The push armature 9 are also passed through the insulating body 5, but in some cases extend diagonally in sections.

Details of the arrangement according to Fig. 1 are in the enlarged detail after Fig. 2 shown. It can be seen that the tie rod 8 and the pressure anchor 15 are respectively passed straight through the insulating body 5 and survive on both front sides of the insulating body 5. 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 anchor 15 is provided at its two free, protruding ends 16, 19, each with a circular pressure plate 17 whose plate plane is parallel to the end face of the insulating body 5.

The push armature 9 comprises two tension sections 10, 14, two push sections 11, 13 and a transition section 12, the frictionally merge into each other and are interconnected. In the illustrated embodiment, the tensile sections 10, 14, the thrust sections 11, 13 and the transition section 12 are integrally formed from a bent reinforcing bar with a circular cross-section. It may also be a welded construction or the like advantageous. Depending on a tie rod 8 and a pressure anchor 15 is assigned a respective thrust armature 9.

The thrust armature 9 is constructed mirror-symmetrically with respect to a lateral direction 18 of the component 1. The transition portion 12 projects in a loop shape over an end face of the insulating body 5 and extends in the lateral direction 18. It is guided in an arc around the adjacent free end 19 of the pressure anchor 15 including its pressure plate 17 arranged thereon. The adjoining thrust sections 11, 13 and pull sections 10, 14 each run in pairs parallel to one another. The two traction sections 10, 14 protrude beyond the opposite end face of the insulating body 5 and extend in a straight line parallel to the tie rod 8 and to the pressure anchor 15.

Fig. 3 shows a variant of the arrangement according to Fig. 2 with a push anchor 9 in combination with two tie rods 8 and two pressure anchors 15. The transition section 12 is guided in an arc around the adjacent free ends 19 of both pressure anchor 15. In the other features and reference numbers, the arrangement is correct Fig. 3 with the one after the Fig. 1 and 2 match.

Fig. 4 shows a cross-sectional view of the thermally insulating component 1 according to the Fig. 1 and 2 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 , ie in the lateral direction 18 (FIG. Fig. 1 ). The protruding in the horizontal direction 23 portions of the tie rod 8, the push armature 9 and the pressure anchor 15 are cast in the concrete material of the two building parts 3, 4.

In the illustrated embodiment, the first building part 3 is a cast building ceiling, which is firmly clamped in the building according to static considerations. 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 Zugzone 6 tensile forces prevail, which are indicated by arrows 24, while indicated in the print zone 7 by arrows 25 indicated compressive forces each 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 follow from the weight load of the second structural part 4 in the direction of gravity 21 and are parallel to this.

It can also be provided a different arrangement in which, for example, both structural parts 3, 4 are clamped on their outer sides. A weight force 21 acting in the region of the parting line 2 then leads at this point to a bending load, which runs in the opposite direction to the arrow 22. Here, the pressure zone 7 forms on the upper side and the tension zone 6 on the underside of the two structural parts 3, 4. The direction of the lateral force 26 then reverses.

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 cast with both over the insulating body 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 15 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 pressure forces acting there 25. Die in the form of the pressure forces 25 from the Bending moment 22 resulting stresses are absorbed by the pressure anchor 15, wherein the introduction of force of the compressive forces 25 in the pressure anchor 15 takes place primarily on the end faces of the two pressure plates 17. 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 15 over a much greater length in the building parts 3, 4 and are embedded in concrete.

Another reinforcing element is formed by the push armature 9, the tensile sections 10, 14 are arranged in the tension zone 6 on a first structural part 3 facing side of the insulating body 5. Starting from the first tensile section 10, but still within the first structural part 3, the first thrust section 11 adjoins, which is bent at an angle α to the horizontal direction 23 and to the longitudinal axis of the tensile 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 second thrust section 13 and in turn of the second train section 14 goes out. The second thrust section 13 and the second traction section 14 are congruent with the first thrust section 11 and the first traction section 10 in the side view shown. The two thrust sections 11, 13 both extend diagonally between the traction zone They are at the same angle α to the horizontal direction 23. The tension sections 10, 14 lie completely in the tension zone 6 and in the installation position shown here parallel to the horizontal direction 23 and parallel to the tensile forces 24 acting there.

The transverse force acting in the second structural part 4 engages the loop-shaped transition section 12 of the push anchor 9. The introduced into the transition section 12 transverse force 26 is implemented in the diagonal thrust sections 11, 13 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 to 60 ° inclusive is expedient and is in particular about 45 °.

The tensile stress forming in the pushing section 11 is introduced into the pulling section 10 and transmitted there according to the arrow 24 as a tensile force on the first building part 3. The power transmission takes place here over the concreted length of the tensile sections 10, 14 on their outer surfaces.

The formation of the free ends 16, 19 of the pressure anchor 15 with the pressure plates 17 and the loop-shaped design of the transition section 12 makes it possible that the free ends 16, 19 of the pressure anchor 15 and the transition section 12 each with only a small amount on the associated end faces of the Insulating 5 protrude and protrude into the respectively associated building part 3, 4, wherein the aforementioned lateral projection is significantly less than the projection of the tensile sections 10, 14 of the push armature 9 and the protruding portions of the tie rod. 8

Claims (8)

1. Thermally insulating construction element (1) for use in kerfs (2) between a first and a second load-bearing part (3, 4) of a structure, in particular between a ceiling of a building and a balcony base plate, comprising an insulating body (5) through which reinforcing elements are routed at right angles to the kerf (2), wherein the construction element (1) has a tension zone (6) and a pressure zone (7) with respect to the weight loading acting in the installed position and is dimensioned to absorb flexural and thrust loads, wherein a first reinforcing element is designed as a tie rod (8) located in the tension zone (6), wherein a second reinforcing element is designed as a thrust rod (9) with two tension sections (10, 14) and two thrust sections (11, 13), wherein a third reinforcing element is designed as a pressure rod (15) located in the pressure zone (7), and wherein the two tension sections (10, 14) of the thrust rod (9) are located in the tension zone (6) on a side of the insulating body (5) which faces the first part (3) of the structure,
   characterised in that the thrust rod (9) has a transitional section (12) located in the pressure zone (7), wherein the first thrust section (11) is routed from the first tension section (10) diagonally through the insulating body (5) to the pressure zone (7) of the oppositely-located second part (4) of the structure and adjoins the transitional section (12) located there, and wherein the second thrust section (13) is routed from the transitional section (12) diagonally through the insulating body (5) back to the side of the first part (3) of the structure into the tension zone (6) located there and merges into the second tension section (14).
2. Construction element according to claim 1,
   characterised in that the tension section (10, 14) is horizontal with respect to the intended installation position.
3. Construction element according to claim 1 or 2,
   characterised in that the thrust section (11, 13) extends at an angle (α) to the horizontal with respect to the intended installation position, the angle (α) lying in a range of 30° to 60° inclusive, being preferably approximately 45°.
4. Construction element according to any of claims 1 to 3,
   characterised in that the tension sections (10, 14), the thrust sections (11, 13) and the transitional section (12) are produced as a single part from a bent reinforcing bar.
5. Construction element according to any of claims 1 to 4,
   characterised in that the thrust rod (9) is mirror-symmetrical with respect to a lateral direction (18) of the construction element (1).
6. Construction element according to any of claims 1 to 5,
   characterised in that an identical number of tie rods (8) and pressure rods (15) is provided.
7. Construction element according to claim 6,
   characterised in that a free end (16) of the pressure rod (15) and in particular both of its free ends (16, 19), are fitted with a pressure disc (17).
8. Construction element according to claim 6 or 7,
   characterised in that the transitional section (12) of the thrust rod (9) spans the adjacent free end (19) of the pressure rod (15) in an arch.

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