Supporting beam for slab systems, slab system and method for the production thereof

Abstract

The invention relates to a supporting beam of composite structure for ceiling systems which are also of a composite structure and which are made at least in sections of concrete, said supporting beam comprising a support, in particular a steel support, which has a base plate and at least one, preferably two webs which, for this purpose, are arranged at an angle, preferably in a perpendicular manner. The invention is characterized in that a space, which is delimited by the web(s) and the base plate, is filled at least in sections with concrete.

Claims

1. A supporting beam for composite slab systems which is formed at least partially of concrete, the supporting beam comprising: a support which includes a base plate and one or more webs which are arranged at an angle thereto, wherein: a space limited by the one or more webs and the base plate is filled at least partially with precast concrete, the supporting beam has through-passages which extend transversely to the longitudinal axis of the supporting beam through the one or more webs and the precast concrete, the through-passages being open and configured to receive composite elements therethrough, the supporting beam comprises a stirrup basket, the base plate includes at least one projection which protrudes transversely to the longitudinal axis of the supporting beam across at least one web, and the space filled with the precast concrete is open on a side of the support facing away from the base plate along at least some areas of the support.

2. The supporting beam according to claim 1, wherein the precast concrete protrudes above at least one web in a direction away from the base plate to form a protrusion.

3. The supporting beam according to claim 2, wherein the protrusion includes a toothing.

4. The supporting beam according to claim 3, wherein the toothing includes at least one longitudinal groove.

5. The supporting beam according to claim 2, wherein the protrusion extends in a direction perpendicular to the base plate.

6. The supporting beam according to claim 1, wherein the inner surface of the one or more webs and/or the base plate includes at least one connector to couple the precast concrete to the support.

7. The supporting beam according to claim 6, wherein the connector includes a form-fit connector.

8. The supporting beam according to claim 7, wherein the stirrup basket includes reinforcement steel.

9. The supporting beam according to claim 8, wherein the precast concrete at least partially surrounds the stirrup basket and the reinforcement steel.

10. The supporting beam according to claim 8, wherein the at least one connector extends through gaps in the stirrup basket in a direction perpendicular to the longitudinal direction.

11. The supporting beam according to claim 8, wherein the reinforcement steel includes longitudinal rods.

12. The supporting beam according to claim 8, wherein the precast concrete entirely surrounds the stirrup basket and the reinforcement steel.

13. The supporting beam according to claim 7, wherein the form-fit connector includes depressions, projections, headed bolts and/or recesses, and/or has wave-shaped, folded and/or bent configurations.

14. The supporting beam according to claim 6, wherein the one or more webs and/or the base plate are formed by projections, depressions, deformations and/or recesses to connect the precast concrete to the support.

15. The supporting beam according to claim 1, wherein the distance from the through-passages to the base plate and the distance from the form-fit connector to the base plate are substantially equal.

16. The supporting beam according to claim 1, further comprising an elastic damping element provided on the at least one projection.

17. The supporting beam according to claim 1, wherein the support includes a fire-resistant layer.

18. The supporting beam according to claim 1, wherein the supporting beam includes a camber.

19. A composite slab system, comprising: at least one supporting beam according to claim 1, at least one semi-finished part or finished part which is supported on the at least one supporting beam, and an in-situ concrete layer which is provided at least in a connecting area between the at least one supporting beam and the semi-finished part or finished part.

20. A method for producing a composite slab system, the method comprising steps of: supporting at least one supporting beam according to claim 1 on bearings, supporting at least one semi-finished part or finished part on the at least one supporting beam, providing composite elements in the connecting area between the at least one supporting beam and the at least one semi-finished part or finished part, providing an in-situ concrete layer at least in a connecting area between the at least one supporting beam and the semi-finished part or finished part.

21. The method according to claim 20, wherein a plurality of composite elements are each guided through a through-passage provided in the at least one supporting beam.

22. The supporting beam according to claim 1, wherein the one or more webs includes two webs.

23. The supporting beam according to claim 1, wherein the one or more webs are arranged perpendicular to the base plate.

24. The supporting beam according to claim 1, wherein the support is a steel support.

25. The supporting beam according to claim 1, wherein the space filled with the precast concrete is entirely open on the side of the support facing away from the base plate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a composite supporting beam according to the invention in a cross-section view perpendicular to the longitudinal direction of the supporting beam; the concrete filling can be carried out with or without reinforcement.

(2) FIG. 2a shows a perspective view of the supporting beam according to the invention having a concrete or steel-reinforced concrete filling.

(3) FIG. 2b shows a further embodiment of the supporting beam according to the invention.

(4) FIG. 3 shows slab systems according to the invention, with FIG. 3a showing the connection of a supporting beam according to the invention with a hollow box place and FIG. 3b showing the connection of a supporting beam according to the invention having a compound slab consisting of element slab as a semi-finished part having lattice support reinforcement and top concrete.

(5) FIGS. 4a and 4b show a supporting beam according to the invention in a cross-section view perpendicular to the longitudinal direction of the supporting beam having a fire-resistant layer.

(6) FIGS. 5a, 5b and 5c show further embodiments of connecting means according to the present invention.

(7) FIG. 5d shows an embodiment of the steel part of the supporting beam having a toothing of the webs through folding or bending as the linearly arranged connecting means as they are shown in other embodiments in FIGS. 5a, b and c.

(8) FIG. 6 shows a supporting beam according to the invention in a cross-section view perpendicular to the longitudinal direction of the supporting beam.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

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

(10) FIG. 1 shows a supporting beam 1 having a support 10 which consists of steel, and a base plate 12 as well as two webs 14 and 16 arranged perpendicular to the base plate 12. Both webs 14 and 16 extend to the same side of the base plate 12 substantially parallel to one another and perpendicular to the base plate 12, i.e. U-shaped.

(11) Both webs 14, 16 and the base plate 12 define a space which is filled with concrete 2. The side, at which the space limited by the webs 14, 16 and the base plate 12 is open is opposite to the base plate. Over this side facing away from the base plate 12, a protrusion 4 protrudes over the space defined by the webs 14, 16 and the base plate 12. This protrusion 4 extends perpendicular to the base plate 12 and within an imagined continuation of the webs 14, 16, i.e. parallel to these.

(12) On the sides transversely to the longitudinal direction L of the supporting beam, the protrusion 4 comprises a toothing 6. In the cross-section view of FIG. 1, this toothing is depicted as a groove on the left and right in the protrusion 4.

(13) Moreover, on the inner surface of the webs 14, 16, i.e. the surface which defines the space between the webs, a connecting means 18 is provided which is formed as a headed bolt and serves the form-fitting connection with the concrete 2. The headed bolt 18 extends from the webs 14, 16 perpendicular and parallel to the base plate 12 at in each case approximately one quarter of the expansion of the space between the webs along the transverse direction of the supporting beam 12 in the concrete 2. In FIG. 1, the connecting means or bolts 18 have a smaller distance to the base plate 12 than the through-passages 20. Preferably, the connecting means or bolts 18 are, however, at least the same distance to the base plate as the through-passages 20. They can have the same distance to the base plate as the through-passages 20, as shown in FIG. 6. However, a larger distance to the base plate 20 is conceivable. This is advantageous in case of fire.

(14) The transverse direction extends perpendicular to the longitudinal direction L of the supporting beam 1 and therefore from right to left in FIG. 1.

(15) An alternative or additional arrangement of bolts which is not shown is that the bolts 18 extend from the base plate 12 parallel to the webs 14, 16 and/or plural bolts extend from one web 14, 16 parallel to the base plate 12 and preferably here the distance of the bolts 18 relative to the base plate 12 or to one another is variable, in particular the bolts at the web 14, 16 are displaceably arranged so that the bolts 18 can be arranged, for example, changing centrally or above in the supporting beam 1.

(16) Unlike as shown in FIG. 2, the webs 16 and 14 can be carried out in a waved/folded/shaped manner in order to thus, with a force-transmitting form-fit, also take on the effect of the connecting means 18, and these can then be entirely or partially dispensed with or also supplemented by continuous elements.

(17) Through-passages 20 extend transversely to the longitudinal axis L of the supporting beam 1, i.e. in the transverse direction, through the webs 14, 16 and through the concrete 2 which is filled between the webs.

(18) Unlike as shown in FIGS. 2 and 4, as indicated in FIG. 3b, the perforations or through-passages in the expanded concrete piece can also be arranged further up so that in the case of assembly they are located above the slab elements placed on the supporting beam 1 and the serve the accommodation of pushed-through reinforcement to form e.g. a slab disk with in-situ concrete.

(19) The base plate comprises two projections 12a, 12b which extend transversely to the longitudinal axis of the supporting beam, i.e. in the transverse direction. These projections correspond to the peripheral areas of the base plate 12 in the transverse direction of the supporting beam 1.

(20) On both projections 12a, 12b, an elastic damping element 22 is each provided on the side of the base plate 12 which points towards the webs 14, 16. The semi-finished part or finished part is placed on these damping elements 22. The elastic damping element 22 can be continuously formed in the longitudinal direction L. It centers the load.

(21) FIG. 2a shows a perspective view of the supporting beam 1. It is apparent from this that the elastic damping elements 22 are on the projections 12a, 12b substantially continuously along the longitudinal direction L.

(22) Moreover, it is apparent that the toothing 6 is formed, by way of example here, as a periodic longitudinal groove. Other embodiments can also provide the toothing outside of the longitudinal groove. Moreover, the through-passages 20 that are arranged at equal distances along the longitudinal direction are shown, through one of which the cross-section of FIG. 1 is taken.

(23) FIG. 2b shows a different embodiment of the supporting beam 1 having the protrusion 4 of concrete or steel-reinforced concrete and the connecting means that are distinct there in the form of a toothing 6. These can be formed with or without the longitudinal groove.

(24) FIGS. 4a and 4b show an embodiment having a fire-resistant layer 17a, 17b. FIG. 4a shows an embodiment in which a fire-resistant layer 17a is provided on the base plate 12, in particular in the supporting beam 1 between the webs 14, 16. In FIG. 4b, a fire-resistant layer 17b is arranged beneath the support 10 or the base plate 12, i.e. at the side of the support 10 or the base plate 12 facing away from the webs 14, 16. The fire-resistant layer 17b can also carry a coating or be a coating itself.

(25) FIG. 5a shows a further embodiment for connecting means according to the invention for achieving a form-fit, namely waved plates 19. These waved plates are also representative for other deformed strip plates which can transmit composite forces through projections/recesses/surface contours. For example, these could be twisted, folded or plastically deformed areas on the metal strip.

(26) These can be attached to the inner surface of the webs 14, 16 and/or the base plate 12 such that the waves and therefore the webs or the base plate can absorb composite forces between concrete and steel.

(27) FIG. 5b shows an embodiment in which the connecting means according to the invention is realized by a strip or a perforated plate 21 which comprises recesses 27 for absorbing transverse forces. The perforated plate 21 extends here parallel to web 14 and/or 16.

(28) FIG. 5c shows a perforated plate 21 having recesses 27, which is arranged perpendicular to the web 14 and/or 16.

(29) FIG. 5d shows a further variant of the steel part of the supporting beam in which the side-web embodiment 19 formed as a fold/bend is arranged together with the base plate 12. In other words, the web 14 and/or 16 therefore comprises folds and/or bends.

(30) FIG. 3 shows one slab system 100 according to the invention having the supporting beam 1 according to the invention as well as a semi-finished part 30 which is supported on the supporting beam 1. Composite elements 26, in particular reinforcing steel, were guided through the through-passage 20 into the supporting beam. The connecting area between the supporting beam 1 and the semi-finished part 30 is filled with in-situ concrete 50. It is particularly evident from FIG. 3a that the in-situ concrete 50 does not penetrate into the through-passages 20 of the supporting beam 1, but rather, the supporting beam 1 is only filled with the concrete 2.

(31) During production of the slab system 100, the supporting beam 1 is firstly supported on bearings (not shown), the semi-finished part 30 is subsequently supported on the supporting beam 1, in particular the projections 12a, 12b. Afterwards, the composite elements 26 are introduced into the through-passages 20 of the supporting beam and thus a connecting area between the supporting beam 1 and the semi-finished part 30 is produced. Lastly, the in-situ concrete layer 50 is applied in the connecting area between the supporting beam and the semi-finished part 30. The in-situ concrete 50 here only penetrates into the through-passages 20 of the supporting beam 1. The space between the webs is not filled with in-situ concrete 50, but rather, has already been filled with concrete 2 during the manufacture of the supporting beam.

(32) FIG. 6 shows an embodiment which has a stirrup basket 25. The reinforcement steel is arranged therein in the form of longitudinal rods 23, 24 which extend in the longitudinal direction L. The stirrup basket 25 and the reinforcement steel 23, 24 are surrounded by concrete 2.

(33) The connecting means 18 extend through gaps in the stirrup basket 25, as is apparent from FIG. 6. The composite effect can be reinforced thereby. In other words, the connecting means 18 can therefore be anchored into the concrete 2 even better.

(34) In this preferred embodiment, the connecting means 18 and the through-passages 20 are arranged at the same distance to the base plate 12. Also in this embodiment as shown, for example, in FIGS. 2a and 2b for the embodiment of FIG. 1, the connecting means 18 and the through-passages 20 are arranged offset to one another in the longitudinal direction L. Moreover, in the embodiment of FIG. 6, damping elements 22 can also be arranged on the projections 12a, 12b substantially continuously along the longitudinal direction L. Other arrangements of the damping elements 22 are possible as well, in particular such as described above.

(35) The reinforcing rods 23, 24 extending in the longitudinal direction L are preferably arranged on two levels, namely the reinforcing rods 23 on a level E1 which is arranged on the (lower) side of the stirrup basket 25 toward the base plate 12, and the reinforcing rods 24 on a level E2 which is arranged on the opposite (upper) side of the stirrup basket 25, namely on the side towards the protrusion 4. Preferably, there a six reinforcing rods 24 arranged in the level E2 and four reinforcing rods 23 in the level E1, which extend in the longitudinal direction L. Any other number is possible depending on strength requirement. The upper level E2 of the reinforcement steels 24 with the concrete 2 forms a reinforced compression chord of the connecting beam.