EP2459812A1 - Élément de béton armé à armature formée d'éléments de tôle en z - Google Patents

Élément de béton armé à armature formée d'éléments de tôle en z

Info

Publication number
EP2459812A1
EP2459812A1 EP10734737A EP10734737A EP2459812A1 EP 2459812 A1 EP2459812 A1 EP 2459812A1 EP 10734737 A EP10734737 A EP 10734737A EP 10734737 A EP10734737 A EP 10734737A EP 2459812 A1 EP2459812 A1 EP 2459812A1
Authority
EP
European Patent Office
Prior art keywords
sheet metal
reinforced concrete
concrete component
reinforcement
metal parts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10734737A
Other languages
German (de)
English (en)
Other versions
EP2459812B1 (fr
Inventor
Gerd GÜNTHER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technische Hochschule Mittelhessen
Original Assignee
Fachhochschule Giessen Friedberg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fachhochschule Giessen Friedberg filed Critical Fachhochschule Giessen Friedberg
Priority to PL10734737T priority Critical patent/PL2459812T3/pl
Publication of EP2459812A1 publication Critical patent/EP2459812A1/fr
Application granted granted Critical
Publication of EP2459812B1 publication Critical patent/EP2459812B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0645—Shear reinforcements, e.g. shearheads for floor slabs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/166—Connectors or means for connecting parts for reinforcements the reinforcements running in different directions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/168—Spacers connecting parts for reinforcements and spacing the reinforcements from the form

Definitions

  • the invention relates to a reinforced concrete component having at least one upper and at least one lower Leksbewehrungslage, and a transverse force reinforcement, which is guided in its extension over the uppermost and lowermost longitudinal reinforcement, according to the preamble of claim 1.
  • shear reinforcement is often necessary in the area of bearing points, in particular in the area of column connections, for receiving the transverse forces occurring there as a result of the column forces.
  • shear reinforcement elements are largely known in the form of S-hooks or temples, dowel strips, double-headed bolts, underwire mats, lattice girders, Tobler WaIm, Geilinger collar and crack star.
  • shear reinforcement in the form of S-hooks or stirrups must enclose a mostly existing longitudinal bending reinforcement in order to prevent the shear reinforcement from tearing out. To lay this is very expensive and therefore costly. At high Reinforcement degrees of the bending tensile reinforcement and high shear reinforcement proportion apply conventional bracket as no longer installable.
  • the dowels are provided at their end with a widened dowel head.
  • the dowels are welded with their other end with a dowel retaining rail.
  • a further development of such a dowel strip is known for example from DE 298 12 676 U1.
  • This dowel strip has a plurality of mutually spaced dowels having a plate-shaped widened dowel head at one end of its dowel shaft and which are fastened to a common dowel retaining rail at the other end, wherein the respective dowel shaft extends through a dowel bore of the dowel retaining rail and provided with a rivet head is.
  • Double head bolts consist of a cylindrical bolt and a relative to the bolt enlarged, above or below lying bolt head, which is usually formed approximately frusto-conical in each case.
  • Several such bolts are connected via a fixed to the lower or upper bolt head spacer bar to a shear reinforcement element, wherein the spacer bar for the correct orientation and the correct height position of the double-headed bolt in the installed state.
  • the double headed bolts are usually threaded from above in a star shape between the upper and lower layers of the longitudinal reinforcement.
  • Tobler WaIm and Geilinger collars are steel components that consist of welded-together steel profiles and are manufactured individually. Due to the high weight of the hoisting equipment, the installation parts must be moved. The manufacture and installation are complex and costly because this tool is not available for other tasks on the site during the time of installation, or must be kept extra. Due to their size and weight, these solutions can not be used in prefabricated parts, since otherwise the transport to the construction site would no longer be economical. These reinforcing elements can therefore only be used for reinforced concrete components, which are manufactured in cast-in-situ construction.
  • the object of the invention is to overcome these and other disadvantages of the prior art and to provide a reinforced concrete component with which also large shear forces or transverse forces can be absorbed.
  • the steel or prestressed concrete part should also be inexpensive to produce and easy to install. Ideally, it should also be manufacturable as a finished part.
  • the invention provides that the transverse force reinforcement of at least 20 free-falling, trapezoidal or triangular sheet metal parts made of structural steel is formed.
  • the advantageous embodiment of the transverse force reinforcement of at least 20 free-falling, trapezoidal or triangular sheet metal parts made of structural steel ensures on the one hand due to the large number of sheet metal parts for a good bond between the concrete and the reinforcement.
  • a reinforced concrete component is inexpensive to manufacture and very stable.
  • the composite effect is also reinforced by the shape of the sheet metal part, since the sheet metal part can become wedged within the concrete.
  • the cost of producing the reinforced concrete component are extremely low due to the inventive design of the transverse force reinforcement, since commercial structural steel can be used. Due to the simple geometry of the sheet metal parts they can be used in one Series production can be manufactured as free-falling stampings. There are no welding operations, screw or solder joints necessary.
  • the production costs of a reinforced concrete part according to the invention are significantly reduced by the design of the shear force reinforcement by the simple sheet metal parts. Furthermore, very little energy is required in the production process of the sheet metal parts by the punching production.
  • the thrust transmission in the composite joint which is to be detected in element ceilings, is also taken over by the sheet metal parts.
  • the cost of producing a reinforced concrete component according to the invention can be further reduced.
  • the transverse force reinforcement is formed from at least 50 sheet metal parts, more preferably from at least 70 sheet metal parts.
  • the stress in the reinforced concrete component can be distributed very homogeneously by the large number of sheet metal parts, which increases the load capacity even further.
  • each sheet metal part has at each of its two ends a fold.
  • the fold is guided up to the top or bottom longitudinal reinforcement.
  • This embodiment of the invention provides for a better stress distribution within the shear force loaded zone of the reinforced concrete component.
  • the cross-sectionally Z-shaped sheet metal part engages with the simple folds at least one reinforcing bar of the upper and one of the lower reinforcement layer, so that a slip-poor anchoring of the punching shear reinforcement in the concrete pressure and Betonzugzone is achieved.
  • a guided through each recess longitudinal reinforcement rod according to the invention improves the carrying capacity of the reinforced concrete component, as obliquely introduced forces on the composite effect between the sheet metal part and longitudinal reinforcement rod are divided into a normal force component and a transverse force component.
  • the reinforced concrete component thus has a higher ductility.
  • the embodiment of the invention such that the bends are formed with additional recesses.
  • the composite effect between the sheet metal parts and the concrete in reinforced concrete component is further improved, the load capacity of the reinforced concrete component is increased again.
  • each sheet metal part has a thickness of 3 or 5 mm. Tests carried out for reasons of carrying capacity have shown that other thicknesses do not achieve the optimum ratio of lateral force carrying capacity with respect to the bonding effect. In addition, the provision of only two sheet metal thicknesses has a particularly favorable effect on the material costs.
  • the sheet metal parts need not be specially adapted in thickness. Rather, they can be made as needed, thereby avoiding storage and storage costs. Only the length of the sheet metal parts must be adapted to the respective ceiling thickness.
  • the sheet metal parts are arranged uniformly around a region with a high transverse force load.
  • the design of the reinforced concrete component can be done with simple means and existing possibilities. A comprehensive calculation for each individual case can thus be avoided.
  • the inventive construction of the reinforced concrete component is thus easy to manufacture and inexpensive.
  • the arrangement of the sheet metal parts which serve as a reinforcement, concentrates when installed in a reinforced concrete component in a core area.
  • the number of sheet metal parts can be advantageously reduced.
  • the tangential distances of the reinforcement components are then increased with increasing distance from the core region.
  • the transverse force reinforcement is formed from so many Z-shaped sheet metal parts of structural steel, ß. y
  • the critical round cut must be made in accordance with DIN 1045-1, section 10.5.2 for inner supports as well as supports near openings in the plate. Supports that are less than 6 hours away from at least one edge of the board are considered edge or corner supports.
  • the round cut is to be carried out in accordance with DIN 1045-1, Figure 41, with a margin of 6 h (instead of 3 d according to Figure 41). If a round cut guide according to DIN 1045-1, picture 39, results in a smaller round cut length, this is decisive.
  • V E d the design values of the actions acting on the component
  • V Rd , max Oßlech ' V Rd , ct Where ⁇ B i ech factor to take account of the increase in load capacity by the plates
  • V R d.ct is determined as follows for interior, edge and corner columns: In the critical round section, the shear force capacity V Rd, ct of the plate for
  • K is the scale factor according to equation (106) in DIN 1045-1,
  • Pi mean longitudinal reinforcement within the considered round section d static component height
  • the shear force reinforcement is formed of so many Z-shaped sheet metal parts of structural steel that the equation P 'Ed - v Rd, sy , z is satisfied.
  • V E d the design values of the actions ß according to DIN 1045-1, Figure 44 or DAfStb Issue 525, Section 10.5.3
  • a thus configured reinforced concrete component has at least as high a punching performance than all comparable known solutions in the prior art. Furthermore, it is advantageous if the distances of the plates in the direction of the loaded surface (support) outgoing radii sr (radial direction) do not exceed the following values:
  • the smallest distance between two sheets should not be less than 3 cm.
  • the distances between the sheets in the direction of the course of the round sections s t are advantageously within the following values: s t ⁇ 0.75 xdx 0.8 xi ⁇ 3.5 xdi Number of the round cut
  • sheet metal parts are first threaded onto the lowermost layer of the longitudinal reinforcement.
  • the sheet metal parts are then upwards because they enclose the recesses of the longitudinal reinforcement form fit and prevent tipping over.
  • the sheet metal parts protrude to the upper longitudinal reinforcement layer or beyond.
  • the reinforcement is poured in a batch with concrete. After hardening of the concrete, the reinforced concrete component is finished and loadable.
  • the reinforced concrete component according to the invention is also finished.
  • the casting with the concrete in two steps.
  • the longitudinal reinforcement are shed with the bleaching parts (at least in a thickness of 5 cm) and transported to the site after curing.
  • the reinforced concrete component according to the invention is ready.
  • FIG. 1 shows a detail of a reinforced concrete component according to the invention
  • Fig. 2a is a front view of a sheet metal part
  • Fig. 2b is a side view of a sheet metal part
  • Fig. 2c is a plan view of a sheet metal part
  • Fig. 3 section of a distribution of sheet metal parts in an inventive
  • Fig. 1 shows a section of a reinforced concrete component 1, which has on the concrete component surfaces O formed from reinforcing bars S upper reinforcement layer Bo and a lower reinforcement layer Bu.
  • a trapezoidal sheet metal part 10 encloses the upper and lower reinforcement layer Bo, Bu.
  • the sheet metal part 10 is arranged in a direction parallel to the reinforcement and at right angles to the concrete component surface O.
  • FIG. 2 a shows a side view of a sheet-metal part 10 according to the invention for use in a reinforced concrete component.
  • the sheet metal part 10 has as the main part 12 a simple flat, trapezoidal body made of structural steel, which has two recesses 30, in the form of holes, in its lower region 15.
  • the rebar S is passed through the anchoring means, which are formed as circular recesses 30.
  • the upper edge 41 is designed substantially perpendicular to the component 12.
  • the lower fold 42 engages behind a reinforcing rod S.
  • FIG. 2b shows a front view of the sheet metal part 10. It can be seen that from the lower end 15 to the upper end 14, the flat main part 12 of the sheet metal part 10 tapers.
  • the folds 41, 42 are designed substantially parallel to each other.
  • Circular recesses 30 form anchoring means for receiving reinforcing rods S. In this case, the recesses 30 are arranged substantially symmetrically to the longitudinal axis of the trapezoidal sheet metal part 10.
  • FIG. 2 c shows a plan view of the sheet-metal part 10, where it can be seen that the lower bend 42 also has recesses 32.
  • the recesses 32 improve the composite effect of the sheet metal part 10 in the reinforced concrete component 1 considerably.
  • a recess 32 is dispensed with in the present exemplary embodiment.
  • the upper bend 41 may also have recesses according to the invention.
  • FIGS. 2a to 2c also clearly show that in the upper region 14, the formed fold 41 is angled backwards, while in the lower region 15, the fold 42 is formed forwardly.
  • the sheet metal part 10 thus has a substantially Z-shaped cross-section.
  • the upper bend 41 is equal to the bending tensile reinforcement
  • the lower fold 42 is formed in the bending pressure zone, in which it generates together with the fürgefädelten reinforcing steel rods S a slip-anchoring of the punching reinforcement.
  • Figure 3 shows a section of a reinforced concrete component according to the invention, with a plurality of sheet metal parts 10.
  • the lower edge 42 engages behind the outermost layer of the lower reinforcement Bu.
  • Reinforcing bars S are thereby consecutively guided by the respective recesses 30 of a sheet metal part 10.
  • the upper bends 41 need not necessarily be performed completely over the upper reinforcement layer Bo. It is already sufficient if the sheet metal part 10 with the respective bends up to and not over the reinforcement layers Bo 1 Bu is performed.
  • Figure 4 shows an inventive reinforced concrete component with a plurality of arranged sheet metal parts. It can be seen that the sheet metal parts are arranged uniformly around a region K. Furthermore, it can be clearly seen that the sheet metal parts 10 are arranged parallel to one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

L'invention concerne un élément de béton armé (1) comprenant au moins un ensemble d'armature longitudinale supérieure (Bo) et un ensemble d'armature longitudinale inférieure (Bu), ainsi qu'une armature d'effort tranchant (0), cette dernière s'étendant, en longueur, au-delà de l'armature longitudinale la plus haute (Bo) et de l'armature longitudinale la plus basse. Selon l'invention l'armature d'effort tranchant (0) est formée d'au moins 20 éléments de tôle d'acier de construction trapézoïdaux ou triangulaires. Chaque élément de tôle comporte à ses deux extrémités une partie repliée (41, 42). La partie repliée s'étend jusqu'à l'armature longitudinale la plus haute (Bo)/l'armature longitudinale la plus basse (Bu).
EP10734737.9A 2009-07-31 2010-07-19 Élément de béton armé à armature formée d'éléments de tôle en z Active EP2459812B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10734737T PL2459812T3 (pl) 2009-07-31 2010-07-19 Żelbetowy element budowlany ze zbrojeniem z części blaszanych w kształcie Z

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009035799 2009-07-31
DE102009056830A DE102009056830A1 (de) 2009-07-31 2009-12-05 Stahlbetonbauteil mit Bewehrung aus Z-förmigen Blechteilen
PCT/EP2010/060384 WO2011012480A1 (fr) 2009-07-31 2010-07-19 Élément de béton armé à armature formée d'éléments de tôle en z

Publications (2)

Publication Number Publication Date
EP2459812A1 true EP2459812A1 (fr) 2012-06-06
EP2459812B1 EP2459812B1 (fr) 2016-01-06

Family

ID=43402774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10734737.9A Active EP2459812B1 (fr) 2009-07-31 2010-07-19 Élément de béton armé à armature formée d'éléments de tôle en z

Country Status (8)

Country Link
US (1) US8650828B2 (fr)
EP (1) EP2459812B1 (fr)
JP (1) JP2013501168A (fr)
DE (2) DE202009018537U1 (fr)
DK (1) DK2459812T3 (fr)
ES (1) ES2565333T3 (fr)
PL (1) PL2459812T3 (fr)
WO (1) WO2011012480A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2236686A1 (fr) * 2009-04-03 2010-10-06 F.J. Aschwanden AG Elément d'armature pour la reprise des efforts dans les dalles en béton aux alentours d'éléments d'appui
WO2014194916A1 (fr) * 2013-06-04 2014-12-11 Abeo A/S Procédé de fabrication d'un élément de construction, appareil pour fabriquer l'élément de construction, et élément de construction fabriqué par le procédé
EP2940227B1 (fr) * 2014-04-30 2021-04-21 Technische Hochschule Mittelhessen Composant plat, élément d'armature de cisaillement et composant en béton précontraint / en béton armé doté d'une armature de cisaillement fabriquée à partir de tels éléments d'armature de cisaillement

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Also Published As

Publication number Publication date
JP2013501168A (ja) 2013-01-10
EP2459812B1 (fr) 2016-01-06
DE102009056830A1 (de) 2011-02-03
DK2459812T3 (en) 2016-03-21
US20120167519A1 (en) 2012-07-05
PL2459812T3 (pl) 2016-06-30
US8650828B2 (en) 2014-02-18
DE202009018537U1 (de) 2011-12-20
WO2011012480A1 (fr) 2011-02-03
ES2565333T3 (es) 2016-04-04

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