FLAT COMPONENT, TRANSVERSE FORCE REINFORCEMENT ELEMENT, AND REINFORCED CONCRETE-/PRESTRESSED CONCRETE COMPONENT HAVING A TRANSVERSE FORCE REINFORCEMENT MADE OF TRANSVERSE FORCE REINFORCEMENT ELEMENTS OF THIS TYPE

Abstract

The invention relates to L-shaped sheet metal parts 21 with an angled longitudinal recess 23 as well as a reinforced concrete/prestressed concrete component with at least one upper and at least one lower longitudinal reinforcement layer and a shear force reinforcement guided in its dimension over the upper-most and the lowermost longitudinal reinforcement, which is formed from the L-shaped sheet metal parts 21 according to the invention with stirrups 30 fastened in the longitudinal recess 23. The reinforced concrete/prestressed concrete component according to the invention is suitable for increasing the punching shear resistance in the region of slab columns of flat slabs.

Claims

1-15. (canceled)

16. A flat component for a shear force reinforcing element (Q), suitable for mounting a stirrup (30), comprising a lower part, configured for connection with the lower longitudinal reinforcement of a reinforced concrete/prestressed concrete component, comprising an upper part which has a fastening region (BF) and a feed region connected thereto, characterized in that the feed region is designed as a recess (A), which has a feed angle of at least 10 to 120, the recess (A) being connected to a side edge and/or the upper edge of the flat component.

17. The flat component according to claim 16, wherein the feed angle comprises a range of 10 to 110, preferably 10 to 80 and 80 to 110, particularly preferably 40 to 50.

18. The flat component according to claim 16, wherein the recess (A) is narrowed to a feed channel (S) in the form of an obliquely upwardly directed longitudinal recess with an opening (29) suitable for feeding a stirrup arch (34).

19. The flat component according to claim 16, wherein the feed channel (S) by the connection with the fastening region (BF) forms an angled longitudinal recess (23) of the two-dimensional component, whereby the feed channel (S) is straight or arcuate.

20. The flat component according to claim 16, wherein the feed channel (S) has a ratchet (27a) formed by two recesses (25a) and (26a) and suitable for mounting a clip plate part (24a).

21. The flat component according to claim 16, wherein the fastening region (BF) has a recess in the direction to the upper edge of the flat component.

22. The flat component according to claim 16, wherein the lower section has a right-angled bend (40).

23. The flat component according to claim 18, wherein the feed channel (S) has an inclination angle , which is selected from the range of at least 10 to 120.

24. The flat component according to claim 16, wherein the feed channel (S) has an inclination angle , which is selected from the range of 30 to 60.

25. A shear force reinforcing element (Q) for a reinforced concrete/prestressed concrete component, comprising a flat component according to claim 16 and at least one stirrup (30) fastened to the flat component.

26. A shear reinforcement element (Q) according to claim 25, wherein stirrups (30) are used, whose stirrup length H.sub.B, with respect to the minimum stirrup length h.sub.B, satisfies the condition h.sub.B<H.sub.B1.06.Math.h.sub.B.

27. A shear reinforcement element (Q) according to claim 26, wherein the stirrup length H.sub.B is selected from the group consisting of: H.sub.B=1.06.Math.h.sub.B, H.sub.B=1.05.Math.h.sub.B, H.sub.B=1.04.Math.h.sub.B, H.sub.B=1.03.Math.h.sub.B, H.sub.B=1.02.Math.h.sub.B and H.sub.B=1.01.Math.h.sub.B.

28. A shear force reinforcing element (Q) according to claim 25, wherein stirrups (30) are used, whose stirrup length H.sub.B is equal to the minimum stirrup length h.sub.B.

29. A reinforced concrete/prestressed concrete component with an upper and a lower longitudinal reinforcement, comprising at least one shear force reinforcing element (Q) according to claim 25 with a flat component according to claim 16 and at least one stirrup (30) connected to the flat component, whereby the at least one stirrup (30) of the shear force reinforcing element (Q) has a connection to the upper longitudinal reinforcement of the reinforced concrete/prestressed concrete component and the flat component has a connection to the lower longitudinal reinforcement of the reinforced concrete/prestressed concrete component.

30. A reinforced concrete/prestressed concrete component according to claim 29, wherein the upper longitudinal reinforcement is designed as a reinforcing mat.

31. Use of the reinforced concrete/prestressed concrete component according to claim 28 in the region of slab columns of flat slabs.

Description

FIGURE CAPTIONS

[0060] FIG. 1Schematic representation of an L-shaped sheet metal part 20 according to the prior art in the installed state and the pulling-in of a stirrup 30 into the straight longitudinal recess 22 of an L-shaped sheet metal part 20.

[0061] FIG. 2aSchematic representation of a flat component 21 with a recess A.

[0062] FIG. 2bSchematic representation of preferred embodiment of a flat component 21, designed as an L-shaped sheet metal part with an angled longitudinal recess 23, in the front view.

[0063] FIG. 2cSpecific embodiment of an L-shaped sheet metal part 21 in the front, side and top view.

[0064] FIG. 3Schematic representation of the pushing-in of a stirrup 30 into an angled longitudinal recess 23 of an L-shaped sheet metal part 21, in case there is no obstruction by a bar of the upper reinforcing layer Bo.

[0065] FIG. 4Schematic representation of the pushing-in of a stirrup 30 into an angled longitudinal recess 23 of an L-shaped sheet metal part 21, in case there is an obstruction by a bar of the upper reinforcing layer Bo (for three different positions I, II, Ill of this bar, for position II as well comparison with the prior art).

[0066] Note: Curvatures of the stirrup arch 34 are not shown in FIG. 4 due to a technical simplification of the drawing. In FIGS. 2b-4 the recess 25a is shown in an unsuitably wide manner. It has to be reduced to about half the width by displacing its edge adjacent the lateral edge of the flat structural part 21 into the interior of the two-dimensional component 21.

REFERENCE KEY

[0067] 1-5temporally successive positions of a stirrup during pulling-in and pushing-in, resp. [0068] 20L-shaped sheet metal part according to the prior art [0069] 21flat component with angled longitudinal recess according to the invention, preferably designed as an L-shaped sheet metal part [0070] 22straight longitudinal recess, designed as a horizontal slot [0071] 23angled longitudinal recess, with fastening region BF and feed channel S [0072] BFfastening region [0073] Zfeed region of a straight longitudinal recess 22 [0074] Afeed region designed as a recess [0075] Sfeed channel [0076] 24clip plate part for ratchet 27 [0077] 24aclip plate part for ratchet 27a [0078] 25, 26recesses for snapping-in a clip plate part (at an L-sheet according to the prior art) [0079] 25a, 26arecesses for snapping-in a clip plate part (at an L-shaped sheet metal part according to the invention) [0080] 27ratchet of an L-shaped sheet metal part 20 according to the prior art [0081] 27aratchet of an L-shaped sheet metal part 21 according to the invention [0082] 28opening of the straight longitudinal recess 22 of an L-shaped sheet metal part 20 [0083] 29opening of the angled longitudinal recess 23 [0084] 30stirrup [0085] 32stirrup shoulder [0086] 34stirrup arch [0087] 40bend [0088] 50recesses just above the bend 40 [0089] Boouppermost reinforcement layer [0090] Boupper reinforcement layer (immediately below Boo) [0091] Buulowermost reinforcement layer [0092] Bulower reinforcement layer (immediately above Buu) [0093] Mcenter line of the flat component 21 [0094] Qshear force reinforcing element consisting of an L-shaped sheet metal part 20 or 21 and a stirrup (or two stirrups) 30 [0095] Rrequired clearance for pulling-in or pushing-in a stirrup into a longitudinal recess 22 and 23, respectively [0096] a-ffeeding a stirrup arch 34 under selected feed angles

FORMULA SYMBOLS

[0097] H.sub.Blength of stirrup [0098] h.sub.Bminimum stirrup length [0099] H.sub.Dheight difference between the opening 29 of the feed channel S and the fastening region BF [0100] L.sub.BFlength of the fastening region BF of the longitudinal recess 23 [0101] L.sub.Slength of the feed channel S of the longitudinal recess 23 [0102] Tdepth of the longitudinal recess 22 or 23 [0103] inclination angle of a stirrup 30 against the vertical axis (stirrup in end position) [0104] inclination angle of a stirrup 30 against the vertical axis (while pulling and pushing, respectively) [0105] inclination angle of the feed channel S against the fastening region BF [0106] feed angle, at which a recess A allows the feeding of a stirrup arch 33 to the fastening region BF [0107] F.sub.Zpulling force when pulling on stirrups 30 [0108] F.sub.tangential component of the pulling force F.sub.Z [0109] F.sub.normal component of the pulling force F.sub.Z [0110] F.sub.Dpushing force while pushing the stirrup 30 [0111] Vlateral offset between stirrup shoulder 32 and stirrup arch 34