EP0917611A1 - Systeme d'armature d'effort tranchant - Google Patents

Systeme d'armature d'effort tranchant

Info

Publication number
EP0917611A1
EP0917611A1 EP97931590A EP97931590A EP0917611A1 EP 0917611 A1 EP0917611 A1 EP 0917611A1 EP 97931590 A EP97931590 A EP 97931590A EP 97931590 A EP97931590 A EP 97931590A EP 0917611 A1 EP0917611 A1 EP 0917611A1
Authority
EP
European Patent Office
Prior art keywords
shear
reinforcement
control
hereof
accordance
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.)
Withdrawn
Application number
EP97931590A
Other languages
German (de)
English (en)
Other versions
EP0917611A4 (fr
Inventor
John Hamilton Maulsden Wylie
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.)
Ironbarks Systems Pty Ltd
Original Assignee
Ironbarks Systems Pty Ltd
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 Ironbarks Systems Pty Ltd filed Critical Ironbarks Systems Pty Ltd
Publication of EP0917611A1 publication Critical patent/EP0917611A1/fr
Publication of EP0917611A4 publication Critical patent/EP0917611A4/fr
Withdrawn legal-status Critical Current

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 [3D] extent, e.g. lattice girders
    • E04C5/0645—Shear reinforcements, e.g. shearheads for floor slabs

Definitions

  • the invention relates to a shear control system for reinforced concrete structures and to a method of placement of reinforcement in order to achieve desired shear control.
  • shear reinforcement elements are typically placed substantially perpendicular to the main reinforcement elements with a view to preventing these main reinforcement elements moving away from each other under the influence of shear forces in the structure.
  • the objective of the present invention is to provide a reinforcement shear control system adapted to reduce the number of elements comprising the reinforcement structure whilst providing effective shear control or at least to provide the market with an alternative.
  • a shear reinforcement system for a reinforced concrete structure comprising one or more shear control members bent into a substantially rectangular wave formation; the shear control members being unitary and continuous for at least l.S wave cycles and being adapted to restrain conventional main tension control reinforcement elements placed substantially transversely thereto and against the shear control reinforcement adjacent a point of maximum amplitude but within the wave configuration.
  • Figures la, lb and lc are sectional views of conventional reinforcing systems
  • FIG. Id and le are sectional views of the reinforcement shear control system in accordance with the present invention.
  • Figure 3 a is a section through a conventional shear reinforcement system in a continuous run situation such as a wall or flat slab;
  • Figure 3b is a section through shear control reinforcement in accordance with the present invention applied to a continuous run such as a wall or flat slab;
  • Figure 4a is a perspective view of multiple parallel rows of shear reinforcement in accordance with the present invention and associated main tension control reinforcement as would be used in relation to a conventional slab;
  • Figure 4b is a side elevation of one row of shear reinforcement from the grid of figure 4a;
  • Figure 5 is a top plan view of a shear control system in accordance with the present invention with a series of shear control elements and main tension control reinforcement all running at right angles to each other;
  • Figure 5a is a section through A-A' of figure 5 and
  • figure 5b is a section through B-B' of figure 5.
  • the conventional shear reinforcement elements are indicated by the reference numerals 1 with the main reinforcement adapted to control tension in the reinforced concrete structure being indexed by the numerals 2 and the wave pattern shear control reinforcement elements in accordance with the present invention being indexed by numerals 3.
  • shear reinforcement 3 in accordance with the present invention takes the form of a rectangular wave pattern although the wave length is not necessarily constant with respect to the amplitude having regard to the fact that the top and bottom main tension control steel in any given structure may have a different spacing than that spacing between each element of main tension control steel and its adjacent element.
  • the wave length of the shear control system in accordance with the present invention may not be constant.
  • Figure 2b depicts a situation where the wave length of every other half wave is twice as long as the preceding wave length.
  • top steel 2a and bottom steel 2b are not exactly as would be the case in the conventional arrangement depicted in figure 3a. This is due to the fact that in order to work in the best possible manner the main tension control steel elements are placed against the internal corners of the square wave function shaped shear reinforcement in accordance with the present invention. This results in the top steel 2a not being directly above the corresponding bottom steel element 2b as is clear from figure 2b. Top steel elements 2a are actually staggered with respect to bottom steel elements 2b in the embodiment of the present invention depicted in figure 3b.
  • FIG 5 there is depicted a rectangular grid of steel reinforcement elements in accordance with the present invention.
  • the tops of the shear control elements in accordance with the present invention are depicted in solid lines with the top 2a and bottom 2b linear main tension control steel elements being depicted in broken lines.
  • the regular square wave form shear control members 3 in accordance with the present invention are likewise placed in a series of parallel rows and parallel columns (the columns being at ninety degrees to the rows).
  • placement of the shear reinforcement in accordance with the present invention should occur prior to placement of the main tension control reinforcement in any given structure in order that the main shear control steel may be placed in the most advantageous position with respect to the shear control reinforcement.
  • This most advantageous position is the internal corners of the rectangular wave structure of the shear control reinforcement in accordance with the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

La présente invention concerne un système d'armature d'effort tranchant destiné à être utilisé dans une structure de béton armé et comprenant au moins un élément (3) d'effort tranchant plié de manière à former des ondulations de forme sensiblement rectangulaire, ledit élément d'effort tranchant (3) étant monobloc et continu sur au moins 1,5 ondulations et permettant de retenir les armatures principales (2) de réglage de tension, lesquelles sont placées de manière sensiblement transversale par rapport à l'élément d'effort tranchant et contre ledit élément d'effort tranchant (3), adjacentes à un point d'amplitude maximale de la configuration en ondulations, mais à l'intérieur de celle-ci.
EP97931590A 1996-07-29 1997-07-29 Systeme d'armature d'effort tranchant Withdrawn EP0917611A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPO1269A AUPO126996A0 (en) 1996-07-29 1996-07-29 Reinforcement shear control system
AUPO1269/96 1996-07-29
PCT/AU1997/000479 WO1998004792A1 (fr) 1996-07-29 1997-07-29 Systeme d'armature d'effort tranchant

Publications (2)

Publication Number Publication Date
EP0917611A1 true EP0917611A1 (fr) 1999-05-26
EP0917611A4 EP0917611A4 (fr) 1999-07-14

Family

ID=3795584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97931590A Withdrawn EP0917611A4 (fr) 1996-07-29 1997-07-29 Systeme d'armature d'effort tranchant

Country Status (5)

Country Link
EP (1) EP0917611A4 (fr)
JP (1) JP2000514513A (fr)
AU (1) AUPO126996A0 (fr)
CA (1) CA2261729A1 (fr)
WO (1) WO1998004792A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10001839C2 (de) * 1999-09-10 2002-03-07 Co Baustahl Gmbh & Co Kg Baustahlkonstruktion, Betonplattenelement mit integrierter Heiz- oder Kühlfunktion und Herstellungsverfahren
IT1398543B1 (it) * 2010-03-05 2013-03-01 Pigazzi Reti S R L Elementi di armatura a punzonamento-taglio per piastre in cemento armato.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB292267A (en) * 1927-03-22 1928-06-21 John Thomas Mcnay Improvements in top and bottom reinforcements for concrete road foundations and the like
GB1209221A (en) * 1968-03-29 1970-10-21 Spencer Wire Co Steel Ltd Improvements in or relating to reinforcing material for concrete roads and the like
DE2703068A1 (de) * 1977-01-26 1978-07-27 Siegfried Dr Ing Krug Bewehrungs-matte bei der oben und unten liegende bewehrungen der haupttragrichtung durch wellenfoermig abgebogene querbewehrungen miteinander verbunden sind
DE3331276A1 (de) * 1983-08-30 1985-03-14 Gleit- Und Lagertechnik Nell Gmbh, 5620 Velbert Schubbewehrung
DE4104298C2 (de) * 1991-02-13 2002-05-29 Roesler Draht Ag Profilbewehrungsmatte

Also Published As

Publication number Publication date
WO1998004792A1 (fr) 1998-02-05
CA2261729A1 (fr) 1998-02-05
EP0917611A4 (fr) 1999-07-14
AUPO126996A0 (en) 1996-08-22
JP2000514513A (ja) 2000-10-31

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