EP2586924A1 - Selbsttragendes Stahlfachwerk für Fachwerksysteme aus einem Stahl-Beton-Gemisch - Google Patents

Selbsttragendes Stahlfachwerk für Fachwerksysteme aus einem Stahl-Beton-Gemisch Download PDF

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Publication number
EP2586924A1
EP2586924A1 EP11425263.8A EP11425263A EP2586924A1 EP 2586924 A1 EP2586924 A1 EP 2586924A1 EP 11425263 A EP11425263 A EP 11425263A EP 2586924 A1 EP2586924 A1 EP 2586924A1
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EP
European Patent Office
Prior art keywords
reinforcements
concrete
steel
rods
metal structure
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
EP11425263.8A
Other languages
English (en)
French (fr)
Other versions
EP2586924B1 (de
Inventor
Giuseppe Carlo Marano
Marc'Antonio Liotta
Floriana Petrone
Francesco Trentadue
Giovanni Bufi
Nicola Ruggiero
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.)
Metalri Srl
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METALRI SNC
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 METALRI SNC filed Critical METALRI SNC
Priority to EP20110425263 priority Critical patent/EP2586924B1/de
Publication of EP2586924A1 publication Critical patent/EP2586924A1/de
Application granted granted Critical
Publication of EP2586924B1 publication Critical patent/EP2586924B1/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/29—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated the prefabricated parts of the beams consisting wholly of metal
    • 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
    • E04C5/065—Light-weight girders, e.g. with precast parts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0486—Truss like structures composed of separate truss elements
    • E04C2003/0495—Truss like structures composed of separate truss elements the truss elements being located in several non-parallel surfaces

Definitions

  • the present patent application relates to a new kind of self-supporting lattice to be used in the realization of buildings by adopting mixed steel-concrete reticular systems.
  • They are generally structures made up of pre-fabricated metal reticular beams which are assembled in a concrete casting realized in the building yard.
  • the placement of such structures comprises first the positioning of the pre-fabricated reticular beam and in the following the realization of the concrete casting. Therefore, two phases of the useful life of such structures, commonly called phase 1 and phase 2, can be distinguished.
  • phase 1 according to constructive systems known at the state of the art and commonly used in the building field, the prefabricated steel lattices coming from the workshops are rested, by means of suitable cranes, on the heads of pillars, thus realizing structures, statically schematizable as beams simply rested on the ends.
  • phase 2 consequently to the concrete curing, the reference static model for calculating stresses and deformations becomes that of a fixed beam, the resistant structure is made up of the pre-stressed steel lattice and the concrete, with acting loads typical of the working phase.
  • a reticular beam known at the state of the art, which is rested between two pillars is shown in figure 1 .
  • the embodiments of the metal lattices known at the state of the art are limited since they impose an over-dimensioning of the metal reinforcements with respect to the loads which they have to support actually in phase 2.
  • the sole steel lattice has to resist to all the loads acting thereon, and so to its own weight, to the floor and concrete casting weight and to the accidental loads. This feature is called "metal lattice self-supporting during the phase 1".
  • the core reinforcements for construction easiness, are provided with the same diameter along the entire development of the beam, it is assumed that the reinforcement diameter of the entire reticular lattice is dimensioned on the basis of the maximum acting stress, thus resulting in a substantial over-dimensioning in the less stressed areas.
  • the acting load is uniformly distributed, and the core reinforcements in the middle of the lattice have the same diameter of those in the end sections, even if they are subjected to very low stresses. It is therefore clear that they are over-dimensioned.
  • to the cutting resistance capacity of the sole reinforcement is summed the contribution of the concrete which gives a significant contribution in the whole resistant mechanism.
  • Aim of the present invention is therefore to provide a self-supporting steel lattice able to overcome the limits linked to the embodiments known at the state of the art and to allow a low over-dimensioning of the reinforcements of the same lattice at equal acting load conditions.
  • the basic idea of the present invention is in fact that a different topologic arrangement of the lattice allows to exploit at best the features of the different materials, which have to resist to in the different phases of the useful life of the structure, thus avoiding the over-dimensioning of the steel structures in the less stressed areas.
  • Figures 1 and 2 show a lattice according to an embodiment known at the state of the art.
  • Figures 3 and 4 show a preferred embodiment of the metal lattice according to the present invention.
  • Figure 5 shows a second embodiment of the metal lattice according to the present invention.
  • the metal lattices known at the state of the art are realized by joining a plate in the lower portion (11) and a series of upper longitudinal reinforcements (12),
  • a series of pyramids is set side by side, whose angles are formed by couples of angular shaped reinforcing rods (13, 14).
  • the self-supporting metal lattice object of the present invention has a modular structure similar to the one of the lattice known at the state of the art: there are provided a lower flat element (21), one or more upper longitudinal reinforcements (22) and a series of angular reinforcing rods (23, 24), arranged similarly to the lattices known at the state of the art. It is clear that what follows with reference to the innovations provided to the lattice according to the present invention can be applied to similar lattices, even if they are not identical to what described. Minor variations of the structure of the lattice according to what is known at the state of the art are comprised in the aims of the present invention.
  • the lattice object of the present invention comprises in fact, in addition to what yet described, additional reinforcements (25, 26, 27, 28) in the terminal portions of the same lattice, which coincide with the resting areas during the structure mounting.
  • each reinforcing rod (25, 26, 27, 28) can be constrained with an end at the terminal portions (211) of the lower reinforcing element (21) and with the other end constrained to the longitudinal reinforcement (22) and to the reinforcing rods (23, 24) at the second or third couple of reinforcing rods starting from the end.
  • the additional reinforcements (25, 26) are constrained at the vertex of the second or third pyramid formed by the reinforcing rods.
  • the reinforcements can be constrained to the terminal elements (40) indicated in figure 4 , preferably "L" shaped, used to rest the beam on the pillar, or at the base of one between the first two pyramids formed by the reinforcing rods starting form the end.
  • This additional reinforcement functions as stiffening element since it provides a constraint to the additional reinforcements (25, 26), thus reducing the inflection free length and so increasing the compression critical load value.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Reinforcement Elements For Buildings (AREA)
EP20110425263 2011-10-28 2011-10-28 Selbstragende Stahlfachwerk für Fachwerksysteme aus einem Stahl-Beton-Gemisch Active EP2586924B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20110425263 EP2586924B1 (de) 2011-10-28 2011-10-28 Selbstragende Stahlfachwerk für Fachwerksysteme aus einem Stahl-Beton-Gemisch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110425263 EP2586924B1 (de) 2011-10-28 2011-10-28 Selbstragende Stahlfachwerk für Fachwerksysteme aus einem Stahl-Beton-Gemisch

Publications (2)

Publication Number Publication Date
EP2586924A1 true EP2586924A1 (de) 2013-05-01
EP2586924B1 EP2586924B1 (de) 2014-04-30

Family

ID=45315684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110425263 Active EP2586924B1 (de) 2011-10-28 2011-10-28 Selbstragende Stahlfachwerk für Fachwerksysteme aus einem Stahl-Beton-Gemisch

Country Status (1)

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EP (1) EP2586924B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUA20162997A1 (it) * 2016-04-29 2017-10-29 Tecnopan Eng S R L Struttura di trave mista e relativo metodo di assemblaggio
IT201900025252A1 (it) * 2019-12-23 2021-06-23 Giovanni Vitone Traliccio per sistemi tralicciati misti acciaio-calcestruzzo con anime e correnti superiori ottimizzati

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE505157A (de) * 1948-10-14 1952-12-19
EP0552485A1 (de) * 1992-01-23 1993-07-28 Julius Schätz Schiebeträger als Verlängerungsstück für einen Stahlbewehrungs-Gitterträger
WO2002101168A1 (en) * 2001-06-12 2002-12-19 Onesteel Reinforcing Pty Ltd A structural formwork member
WO2004067873A1 (en) * 2003-01-31 2004-08-12 Tecnostrutture Srl Mixed-type steel-cement bearing girder and relative method of production

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE505157A (de) * 1948-10-14 1952-12-19
EP0552485A1 (de) * 1992-01-23 1993-07-28 Julius Schätz Schiebeträger als Verlängerungsstück für einen Stahlbewehrungs-Gitterträger
WO2002101168A1 (en) * 2001-06-12 2002-12-19 Onesteel Reinforcing Pty Ltd A structural formwork member
WO2004067873A1 (en) * 2003-01-31 2004-08-12 Tecnostrutture Srl Mixed-type steel-cement bearing girder and relative method of production

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUA20162997A1 (it) * 2016-04-29 2017-10-29 Tecnopan Eng S R L Struttura di trave mista e relativo metodo di assemblaggio
IT201900025252A1 (it) * 2019-12-23 2021-06-23 Giovanni Vitone Traliccio per sistemi tralicciati misti acciaio-calcestruzzo con anime e correnti superiori ottimizzati
EP3851605A3 (de) * 2019-12-23 2021-10-06 Giovanni Vitone Fachwerk für fachwerksysteme aus einem stahl-beton-gemisch mit einem optimierten gurt

Also Published As

Publication number Publication date
EP2586924B1 (de) 2014-04-30

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