EP2363546A1 - Schub- und Durchstanzbewehrungselemente für Stahlbetonplatte - Google Patents

Schub- und Durchstanzbewehrungselemente für Stahlbetonplatte Download PDF

Info

Publication number
EP2363546A1
EP2363546A1 EP11155127A EP11155127A EP2363546A1 EP 2363546 A1 EP2363546 A1 EP 2363546A1 EP 11155127 A EP11155127 A EP 11155127A EP 11155127 A EP11155127 A EP 11155127A EP 2363546 A1 EP2363546 A1 EP 2363546A1
Authority
EP
European Patent Office
Prior art keywords
omega
reinforcement
puncturing
reinforcement element
reinforcing bars
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Withdrawn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
EP11155127A
Other languages
English (en)
French (fr)
Inventor
Gianluigi Pigazzi
Daniele Mietto
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.)
PIGAZZI RETI Srl
Original Assignee
PIGAZZI RETI Srl
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 PIGAZZI RETI Srl filed Critical PIGAZZI RETI Srl
Publication of EP2363546A1 publication Critical patent/EP2363546A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
    • E04C5/0622—Open cages, e.g. connecting stirrup baskets

Definitions

  • the present invention relates to puncturing reinforcement elements for slabs.
  • slabs refers hereunder to foundations, concrete slabs, etc. made of reinforced concrete filled, lightened and post-stretched.
  • a first method consists in preparing a series of shaped reinforcements.
  • the anti-puncturing elements are produced by the shaping of B 450 C steel bars. In this case, there is no single consolidated form but various types, which is left to the imagination and inventiveness of the designer. Reinforcements having the form of "grecques”, pins and hooks can be found, to classical rods and folded elements.
  • the difficulty is mainly due to the presence of reinforcing bars in the two orthogonal directions in both the lower and upper grid. It is in fact extremely difficult to insert flexible reinforcements inside shaped elements, with the direct consequence that the assembly of the reinforcements is not adequately effected.
  • Another problem is that, in order to limit the number of shaped bars and consequently simplify their assembly, they are concentrated near the pillar and are not extended sufficiently for covering the whole area involved by the puncturing phenomenon.
  • a second method envisages anti-puncturing nails.
  • anti-puncturing nails are elements consisting of steel bars, smooth or with an improved adherence, at whose ends two circular-shaped heads are produced by means of pressure casting processes, with a diameter equal to about 2-3 times that of the leg.
  • This second method also has various disadvantages and critical aspects and requires a search for alternative ameliorative solutions.
  • a critical aspect also lies in a non-perfect positioning as, in this case, the nails do not fit the 4 reinforcing directions.
  • the anti-puncturing nails produce a concentration of stress in the concrete, due to the fact that the anchoring of these elements is normally achieved by means of their heads.
  • a general objective of the present invention is to solve the drawbacks of the known art described above in an extremely simple, economical and particularly functional way.
  • a further objective is to find a solution which avoids the difficulty of effecting a correct positioning under uncomfortable worksite conditions, allowing the puncturing and cutting reinforcement to be optimized, by increasing the laying rate.
  • Another objective is to produce puncturing reinforcement elements for slabs which respect all the provisions of the regulations in force such as DM 14-01-2008 and UNI EN 1992-1-1:2005 and, above all, to obtain a static behaviour which corresponds perfectly to the state of stress of the element.
  • puncturing reinforcement elements have been conceived for slabs having the characteristics specified in the enclosed claims.
  • this illustrates a schematic perspective view of a puncturing reinforcement element for slabs produced according to the present invention, indicated with 11.
  • Each element 11 comprises a series of omega-shaped elements 12 spaced between each other and connected by means of a pair of electrowelded longitudinal wires 13, to a straight end section 16.
  • each element 12 divides it into a flat straight upper central portion 14 from which two vertical portions 15 extend, arranged at 90° with respect to the upper portion 14 and two straight lower end portions 16, also arranged at 90° with respect to the two vertical portions 7.5.
  • the electrowelded longitudinal wires 13 are positioned on the two lower portions 16 above and below with respect to this.
  • the omega-shaped elements 12 are produced with rounded sections having a diameter ranging from 5 mm to 24 mm. It should be pointed out that the height of the omega varies in relation to the thickness of the concrete slab, the concrete covers and diameters of the flexible reinforcements which are positioned therein.
  • the length of the upper section 14 of the omega element 12 depends on the pitch of the puncturing reinforcements which, in turn, depend on the useful height of the concrete slab.
  • the length of the lower sections 16 of the omega element 12 is determined by the anchoring requirements.
  • Figure 1 shows how the elements 12 are preassembled in the factory "in strips" 11 by means of an electrowelded longitudinal wire 13.
  • the pitch is determined on the basis of the structural calculation and normally ranges from 10 cm to 30 cm.
  • a further assembly step enables the various strips 11 to be joined thus obtaining the multiple element shown in figure 2 to be positioned on a cylinder caisson, schematized in 17.
  • the assembly is effected by means of omega-shaped elements 12 flanked and joined to each other in correspondence with their lower straight end sections 16 for example by means of electrowelding.
  • each omega-shaped element 12 is superimposed in correspondence with a lower end section 16 with the subsequent one, so as to form a continuous development.
  • the grid is studied so as to be perfectly coupled with the structural network of lower flexible reinforcing bars in both perpendicular directions 19 and 20 and upper bars in both perpendicular directions 21 and 22. This is also the case when the bars are pre-packaged in the form of monodirectional or bidirectional network panels.
  • the additional reinforcements of the fourth order should be positioned below the upper section 14, so as to close the strut tie knot between upper reinforcements and the compressed strut.
  • distancing elements 25 are envisaged between the lower and upper networks which are made-to-measure for each concrete slab. In this way, the required height and perfect positioning of the bars 24 inside the omega-shaped element are guaranteed for the upper reinforcements.
  • the whole structure is positioned on the cylinder caisson 17 after arranging lower distancing elements 26 made of plastic or fibre-cement.
  • the lower distancing elements 26 made of plastic or fibro-cement are positioned, followed by the immediate positioning of the self-supporting puncturing reinforcement elements 11 one by one as shown in figure 1 or directly arranged in array as shown in figure 2 .
  • bars 19 are positioned in a first lower base reinforcement direction X with possible additional bars 26 and bars 20 are then positioned in a second lower base reinforcement direction Y with possible additional bars 23.
  • Distancing elements 25 are then arranged between the lower and upper networks.
  • the upper set-up is completed by first positioning the first upper direction of reinforcement bars 21 in the base direction X with a relative additional reinforcement 27 followed by the positioning of the second upper direction of reinforcement bars 22 in the base direction Y with a relative additional reinforcement 24 inside the omegas.
  • this element in fact, considerably improves the performances from the point of view of various aspects.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Reinforcement Elements For Buildings (AREA)
EP11155127A 2010-03-05 2011-02-21 Schub- und Durchstanzbewehrungselemente für Stahlbetonplatte Withdrawn EP2363546A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2010A000357A IT1398543B1 (it) 2010-03-05 2010-03-05 Elementi di armatura a punzonamento-taglio per piastre in cemento armato.

Publications (1)

Publication Number Publication Date
EP2363546A1 true EP2363546A1 (de) 2011-09-07

Family

ID=43283410

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11155127A Withdrawn EP2363546A1 (de) 2010-03-05 2011-02-21 Schub- und Durchstanzbewehrungselemente für Stahlbetonplatte

Country Status (2)

Country Link
EP (1) EP2363546A1 (de)
IT (1) IT1398543B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT522366A2 (de) * 2019-04-12 2020-10-15 Fischer Rista Ag Bewehrungselement, Betonbauelement und Verfahren zum Herstellen eines Betonbauelements
WO2022058695A1 (fr) * 2020-09-21 2022-03-24 Ecole Nationale Des Ponts Et Chaussees Cage d'armature de renforcement d'une poutre en béton

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1135333A (fr) * 1955-06-30 1957-04-26 Système de poutrelle pour construction
GB2149832A (en) * 1983-11-17 1985-06-19 Avi Alpenlaendische Vered Stirrup basket
EP0184995A2 (de) * 1984-12-12 1986-06-18 Ulisse C. Aschwanden Schubbewehrungssystem
EP0688613A1 (de) * 1994-06-24 1995-12-27 Fischer Reinach Ag Bewehrung für gestützte Betondecken im Bereiche von deren Stützen sowie Verfahren zu deren Herstellung und Biegemaschine
WO1998004792A1 (en) * 1996-07-29 1998-02-05 Ironbarks Systems Pty. Ltd. Reinforcement shear control system
DE10001839A1 (de) * 1999-09-10 2001-04-26 Co Baustahl Gmbh & Co Kg Baustahlkonstruktion, Betonplattenelement mit integrierter Heiz- oder Kühlfunktion und Herstellungsverfahren

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1135333A (fr) * 1955-06-30 1957-04-26 Système de poutrelle pour construction
GB2149832A (en) * 1983-11-17 1985-06-19 Avi Alpenlaendische Vered Stirrup basket
EP0184995A2 (de) * 1984-12-12 1986-06-18 Ulisse C. Aschwanden Schubbewehrungssystem
EP0688613A1 (de) * 1994-06-24 1995-12-27 Fischer Reinach Ag Bewehrung für gestützte Betondecken im Bereiche von deren Stützen sowie Verfahren zu deren Herstellung und Biegemaschine
WO1998004792A1 (en) * 1996-07-29 1998-02-05 Ironbarks Systems Pty. Ltd. Reinforcement shear control system
DE10001839A1 (de) * 1999-09-10 2001-04-26 Co Baustahl Gmbh & Co Kg Baustahlkonstruktion, Betonplattenelement mit integrierter Heiz- oder Kühlfunktion und Herstellungsverfahren

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT522366A2 (de) * 2019-04-12 2020-10-15 Fischer Rista Ag Bewehrungselement, Betonbauelement und Verfahren zum Herstellen eines Betonbauelements
AT522366A3 (de) * 2019-04-12 2020-11-15 Fischer Rista Ag Bewehrungselement, Betonbauelement und Verfahren zum Herstellen eines Betonbauelements
AT522366B1 (de) * 2019-04-12 2021-12-15 Fischer Rista Ag Bewehrungselement, Betonbauelement und Verfahren zum Herstellen eines Betonbauelements
WO2022058695A1 (fr) * 2020-09-21 2022-03-24 Ecole Nationale Des Ponts Et Chaussees Cage d'armature de renforcement d'une poutre en béton
FR3114330A1 (fr) * 2020-09-21 2022-03-25 Ecole Nationale Des Ponts Et Chaussees Cage d’armature de renforcement d’une poutre en béton

Also Published As

Publication number Publication date
ITMI20100357A1 (it) 2011-09-06
IT1398543B1 (it) 2013-03-01

Similar Documents

Publication Publication Date Title
CN201785865U (zh) 一种后张法体外预应力钢梁和先张法预应力叠合梁结合的房屋结构体系
JPS61155529A (ja) 建築用プレハブモジュール
TW201144541A (en) A building structure
CN111364681B (zh) 一种端部柱梁节点预应力筋交错张拉锚固构造及施工方法
WO2018112015A1 (en) Rebar wall set-up bar
CN102051931B (zh) 一种用于密肋复合墙的钢筋笼和钢筋笼的安装方法
KR101499337B1 (ko) 광폭 pc 복합거더
EP2363546A1 (de) Schub- und Durchstanzbewehrungselemente für Stahlbetonplatte
CN108026727B (zh) 夹持件
KR102269141B1 (ko) 지하 흙막이 가시설을 이용한 데크플레이트 합벽 설치공법
CN106567501B (zh) 装配式成型钢筋骨架及其装配方法
KR101970873B1 (ko) 토핑콘크리트층을 갖는 강합성 중공 슬래브
KR101722084B1 (ko) 입체 격자 철근조립체의 제작방법
CN111910811A (zh) 一种肋板骨架混凝土现浇板
JP2004197388A (ja) フラットスラブ構造
KR20180011528A (ko) 트러스 작용을 활용한 프리스트레스트 하이브리드 합성보
KR102234463B1 (ko) 전단보강재 유닛 및 이를 이용한 철근콘크리트 구조물의 전단보강 구조
KR20200104529A (ko) 철근콘크리트 구조물의 슬래브-기둥 접합부 전단보강구조
JP7264690B2 (ja) コンクリート腰壁構造体の作製方法および建物構造
CN210508018U (zh) 一种混凝土预制楼板
CN203008239U (zh) 钢筋保护层垫块
KR101051356B1 (ko) 슬라브와 기둥 접합부의 전단보강체
KR20220169258A (ko) 철근콘크리트 건축물용 철근 선조립체의 제작방법
KR20120102824A (ko) 철근콘크리트구조 부재의 입체그리드 전단보강 공법
KR20050021611A (ko) 기둥 슬래브간 접합부 전단 보강체 및 이를 이용한 전단보강구조

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20120229

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140902