EP1932979A2 - Mechanische Verbindung für Betonelemente - Google Patents

Mechanische Verbindung für Betonelemente Download PDF

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Publication number
EP1932979A2
EP1932979A2 EP07120347A EP07120347A EP1932979A2 EP 1932979 A2 EP1932979 A2 EP 1932979A2 EP 07120347 A EP07120347 A EP 07120347A EP 07120347 A EP07120347 A EP 07120347A EP 1932979 A2 EP1932979 A2 EP 1932979A2
Authority
EP
European Patent Office
Prior art keywords
plate
anchoring
disposed
concrete element
mechanical connection
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Withdrawn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
EP07120347A
Other languages
English (en)
French (fr)
Other versions
EP1932979A3 (de
Inventor
Roberto Ragozzini
Alberto Dal Lago
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.)
Rurfim SRL
Original Assignee
Ruredil SpA
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 Ruredil SpA filed Critical Ruredil SpA
Publication of EP1932979A2 publication Critical patent/EP1932979A2/de
Publication of EP1932979A3 publication Critical patent/EP1932979A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction

Definitions

  • the present invention relates to a mechanical connection for concrete elements, and to concrete elements comprising a connection element in accordance with the introduction to the independent claims.
  • prefabricated reinforced concrete elements are connected together by providing in a first of them a male connection element projecting from the concrete element and non-removably fixed to it, and a female connection element provided in a second concrete element to be connected to the first.
  • the male connection element which projects in this manner from the prefabricated concrete element givers rise to considerable difficulties when the two concrete elements to be connected together are in the process of being superposed.
  • the upper column has to be suitably lifted above the male element an precisely positioned, to be then lowered onto the lower column by inserting the male connection element into the female connection element.
  • the male connection element prevents the two elements from being brought into contact by an edgewise sliding movement, so making other more complicated types of connection necessary.
  • this male connection element is a single element, it does not embrace the plurality of longitudinal reinforcement rods of the concrete element, so creating considerable discontinuities in the transmission of tensions from one concrete element to the other, so weakening the combined two concrete elements once connected together.
  • An object of the present invention is therefore to provide a mechanical connection for prefabricated concrete elements which enables the stated drawbacks to be overcome, a particular object being to provide a connection which does not present projections and which hence enables simple and precise superposing of the two concrete to be joined together.
  • Another object is to provide a mechanical connection which enables two prefabricated concrete elements to be easily and quickly joined together.
  • a further object is to obtain concrete elements comprising connection elements which create continuity with the reinforcement rods present in them, to improve force transmission.
  • Said fixing means comprises at least two connection elements, namely a male element and a female element.
  • the fixing means is releasable.
  • three fixing means are present with female elements in the form of three threaded sockets 10, 11, 12 disposed on the second plate such that the second front surface 6 is free, the three threaded sockets 10, 11, 12 being accessible from the second front surface 6.
  • three removable male connection elements 13, 14, 15 are also present, comprising three screws to be inserted into the first plate 1 via anchoring holes 16, 17, 18.
  • the three threaded sockets 10, 11, 12 are fixed permanently to the second plate 2 on the side comprising the second rear surface 8.
  • the second anchoring system 4 comprises five bars joined to the threaded sockets 10, 11, 12 by welding.
  • the three threaded sockets 10, 11, 12 are disposed at a right angle, with one element 10 at the corner and two elements 11 and 12 in a lateral position.
  • the three anchoring holes 16, 17, 18 are provided in the first plate 1 in positions corresponding to those of the three threaded sockets 10, 11, 12 when the first plate 1 is superposed on the second plate 2. They have a diameter greater than the outer diameter of the screws 13, 14, 15 to be inserted through them and engage in the corresponding threaded sockets 10, 11, 12. The slack created by the greater diameter is important during assembly as the screws can then be moved about within the anchoring hole through which they have been inserted, to search for the corresponding socket and engage it. Hence said connection elements can be coupled together even if the anchoring hole is not aligned with the female element. For this reason a washer must be provided with each screw.
  • this washer is to enable the screw to be moved within the anchoring hole and to act as an abutment for the screw head.
  • the second plate 2 to which the threaded sockets 10, 11, 12 are joined acts only as a template, i.e. as an alignment element such that the inlets of the threaded sockets 10, 11, 12 lie in the same plane.
  • the first plate 1 has a greater thickness than the second plate 2, as the thickness of the first plate 1 is required to withstand the connection forces transmitted by the screws 13, 14 and 15, this force being transmitted by the direct connection (weld) between the threaded sockets 10, 11, 12 and the constituent bars of the second anchoring system 4.
  • the three anchoring holes 16, 17, 18 provided in the first plate 1 are disposed at a right angle with one 16 at the corner and two 17, 18 in a lateral position.
  • the first anchoring system 3 comprises five bars joined to the first plate 1 by welding, of which four are disposed in pairs in proximity to each of the two anchoring holes 17, 18 in a lateral position and one is disposed in proximity to the corner anchoring hole 16 on the bisector of the right angle formed by the three anchoring holes 16, 17, 18.
  • Said five bars 3 are able to anchor to the three column reinforcement rods by adherence.
  • the bars can also present a transverse enlargement and anchor by interference.
  • the screws 13, 14, 15 are of socket head type to enable them to be easily tightened.
  • the threaded sockets 10, 11, 12 are dead-ended at that end facing the concrete element, i.e. in the direction in which the second anchoring system projects. This serves to prevent entry of concrete into the threaded sockets on forming the concrete element.
  • the second anchoring system 4 can lack bars which project from the rear second surface 8 of the second plate 2.
  • the bars of the second anchoring system 4 can present a transverse enlargement allowing anchoring by interference.
  • the second anchoring system can be in the form of the said threaded sockets 10, 11, 12 terminating with a transverse enlargement able to anchor them to the concrete element.
  • the threaded sockets are known as self-gripping. This is particularly useful when the mechanical connection has to be made on the lateral surface of a column, it hence being impossible to insert into the column a second anchoring system comprising very long bars, which would emerge from the column.
  • the enlargement used to render the threaded socket self-gripping can be surrounded by bracing irons inside the column, which withstand the external traction to which the self-gripping socket is subjected.
  • the female elements 10, 11, 12 of the second plate 2 can comprise threaded holes provided in the second plate 2.
  • the second plate 2 must have a considerable thickness, at least similar to that of the first plate 1.
  • the invention also comprises two mutually connectable reinforced concrete elements 30 and 31 of elongated shape, with reinforcement rods of longitudinal axis.
  • a first concrete element 30 reinforced with reinforcement rods 32, 33, 34 of longitudinal axis comprises a first plate 1 presenting a free first front surface 5 and, facing the concrete element 30, a first rear surface 7 from which there projects an anchoring system 3 which enters the concrete element 30 to adhere to it.
  • the first plate 1 comprises three anchoring holes 16, 17, 18 disposed on the prolongation of the longitudinal axis of the reinforcement rods 32, 33, 34.
  • the concrete element 30 is shaped to make the anchoring holes 16, 17, 18 accessible from the side comprising the first rear surface 7 for the screws 13, 14, 15 used for the connection. This shape is achieved by means of inserts, which are either recoverable (of steel) or disposable (of polystyrene).
  • the concrete element 30 is of quadrangular cross-section with four corners, in proximity to each corner it presenting three reinforcement rods 32, 33, 34 of longitudinal axis and three anchoring holes 16, 17, 18 disposed in the first plate 1 on the prolongation of the longitudinal axis of each of said reinforcement rods 32, 33, 34.
  • the three anchoring holes 16, 17, 18 are disposed at a right angle with one element 16 at the corner and two elements 17, 18 in a lateral position.
  • the first anchoring system 3 comprises five bars, of which four are disposed in pairs in proximity to each of the two anchoring holes 17, 18 in a lateral position and one is disposed in proximity to the corner anchoring hole 16 on the bisector of the right angle formed by the three anchoring holes 16, 17, 18.
  • the invention also comprises a second elongated reinforced concrete element 31 with reinforcement rods 38, 39, 40 of longitudinal axis comprising a second plate 2 presenting a free second front surface 6 and, facing the concrete element 31, a second rear surface 8 from which there projects a second anchoring system 4 which enters the concrete element 31 to adhere to it, said second plate 2 presenting female connection elements 10, 11, 12 accessible from the second front surface 6 and disposed on the prolongation of the longitudinal axis of the reinforcement rods 38, 39, 40.
  • the female connection elements are threaded sockets 10, 11, 12, joined permanently to the second plate 2. Said threaded sockets 10, 11, 12 project from the second rear surface 8 to penetrate into the concrete element 31.
  • the concrete element 31 is of quadrangular cross-section with four corners, in proximity to each corner it presenting three reinforcement rods 38, 39, 40 of longitudinal axis and three threaded sockets 10, 11, 12 disposed on the prolongation of the longitudinal axis of each of said reinforcement rods 38, 39, 40.
  • the three threaded sockets 10, 11, 12 are disposed at a right angle with one 10 at the corner and two 11, 12 in a lateral position.
  • the second anchoring system 4 comprises five bars, of which four are adjacent to and welded in pairs to each of the two threaded sockets 11, 12 disposed in the lateral position, while one is adjacent to and welded to the corner threaded socket 10.
  • Said second anchoring system can comprise a transverse enlargement of the threaded sockets 10, 11, 12 (self-gripping sockets).
  • the two concrete elements are abutted so that the first plate 1 is superposed on the second plate 2.
  • the first and second front surfaces of the first and second plate are free and without elements projecting therefrom.
  • the washers 19, 20, 21 are superposed on the anchoring holes 16, 17, 18; the screws 13, 14, 15 are inserted through the anchoring holes via the washers and are moved about until they find the entry of the threaded sockets 10, 11, 12. At this point the screws are tightened to join the two concrete elements together.
  • the first and second anchoring system 3 and 4 ensure that the first and second plate 1, 2 are anchored to the respective concrete elements.
  • connection elements screws and threaded sockets
  • a further advantage is the fact that the front surfaces 5, 6 of the plates 1, 2 are free, allowing considerable freedom of movement when superposing the first front surface 5 of the first plate 1 on the second front surface 6 of the second plate 2.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)
EP07120347A 2006-12-04 2007-11-09 Mechanische Verbindung für Betonelemente Withdrawn EP1932979A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20062327 ITMI20062327A1 (it) 2006-12-04 2006-12-04 Collegamento meccanico per elementi in calcestruzzo

Publications (2)

Publication Number Publication Date
EP1932979A2 true EP1932979A2 (de) 2008-06-18
EP1932979A3 EP1932979A3 (de) 2011-03-09

Family

ID=39226699

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07120347A Withdrawn EP1932979A3 (de) 2006-12-04 2007-11-09 Mechanische Verbindung für Betonelemente

Country Status (2)

Country Link
EP (1) EP1932979A3 (de)
IT (1) ITMI20062327A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2381045A1 (de) 2010-04-26 2011-10-26 Ruredil S.p.A. Mechanische Verbindung für vorgefertigte Gegenstände aus Stahlbeton sowie Herstellungsverfahren dafür
ITAR20110016A1 (it) * 2011-08-09 2013-02-10 Carlo Izzo Dispositivo di giunzione di manufatti prefabbricati, in particolare di elementi strutturali in calcestruzzo, e procedimento di realizzazione di un elemento strutturale prefabbricato in calcestruzzo armato

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1247102A (fr) * 1960-01-28 1960-11-25 Deutsche Bauakademie Assemblage bout à bout de pièces préfabriquées en béton armé
DE1250102B (de) * 1967-09-14
DE1409137A1 (de) * 1959-06-18 1968-11-21 Holzmann Philipp Ag Verfahren und Vorrichtung zum Koppeln von Spanndrahtbuendeln
DE2063438A1 (de) * 1970-12-23 1972-08-03 NOE-Schaltechnik Georg Meyer-Keller KG, 7334 Süssen Vorrichtung zum Kontaktstoß von Bewehrungsst äben

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250102B (de) * 1967-09-14
DE1409137A1 (de) * 1959-06-18 1968-11-21 Holzmann Philipp Ag Verfahren und Vorrichtung zum Koppeln von Spanndrahtbuendeln
FR1247102A (fr) * 1960-01-28 1960-11-25 Deutsche Bauakademie Assemblage bout à bout de pièces préfabriquées en béton armé
DE2063438A1 (de) * 1970-12-23 1972-08-03 NOE-Schaltechnik Georg Meyer-Keller KG, 7334 Süssen Vorrichtung zum Kontaktstoß von Bewehrungsst äben

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2381045A1 (de) 2010-04-26 2011-10-26 Ruredil S.p.A. Mechanische Verbindung für vorgefertigte Gegenstände aus Stahlbeton sowie Herstellungsverfahren dafür
ITMI20100711A1 (it) * 2010-04-26 2011-10-27 Ruredil Spa "collegamento meccanico per manufatti prefabbricati in conglomerato cementizio armato e procedimento per produrli"
ITAR20110016A1 (it) * 2011-08-09 2013-02-10 Carlo Izzo Dispositivo di giunzione di manufatti prefabbricati, in particolare di elementi strutturali in calcestruzzo, e procedimento di realizzazione di un elemento strutturale prefabbricato in calcestruzzo armato

Also Published As

Publication number Publication date
EP1932979A3 (de) 2011-03-09
ITMI20062327A1 (it) 2008-06-05

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