WO2009010366A1 - Poutres perfectionnées pour renforcer le béton et procédé pour les relier à des piliers afin de fournir une continuité d'une baie à une autre - Google Patents

Poutres perfectionnées pour renforcer le béton et procédé pour les relier à des piliers afin de fournir une continuité d'une baie à une autre Download PDF

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Publication number
WO2009010366A1
WO2009010366A1 PCT/EP2008/057760 EP2008057760W WO2009010366A1 WO 2009010366 A1 WO2009010366 A1 WO 2009010366A1 EP 2008057760 W EP2008057760 W EP 2008057760W WO 2009010366 A1 WO2009010366 A1 WO 2009010366A1
Authority
WO
WIPO (PCT)
Prior art keywords
girder
girders
truss
pillar
reinforcing members
Prior art date
Application number
PCT/EP2008/057760
Other languages
English (en)
Inventor
Ubaldo Leone
Original Assignee
Leone, Lucio
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 Leone, Lucio filed Critical Leone, Lucio
Priority to BRPI0814421-4A2A priority Critical patent/BRPI0814421A2/pt
Priority to US12/669,741 priority patent/US20100170194A1/en
Priority to EP08761203A priority patent/EP2181224A1/fr
Publication of WO2009010366A1 publication Critical patent/WO2009010366A1/fr

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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
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21—Connections specially adapted therefor
    • E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
    • 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
    • E04B5/43—Floor structures of extraordinary design; Features relating to the elastic stability; Floor structures specially designed for resting on columns only, e.g. mushroom floors
    • 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

Definitions

  • IMPROVED GIRDERS FOR REINFORCING CONCRETE AND METHOD FOR CONNECTING THEM TO PILLARS IN ORDER TO PROVIDE CONTINUITY FROM BAY TO BAY
  • the present invention relates to girders for the manufacturing of structures for constructions and for reinforcing substantially horizontal structural members made of reinforced concrete and to a method for connecting these structural members to pillars.
  • the invention relates to a girder comprising prefabricated trusses and provided with lateral protrusions suitable for supporting short members for reinforcing the connecting knot between girders and pillar as well as for connecting the girders of adjacent bays in a continuous way.
  • Metal girders made up of prefabricated trusses welded on a metal plate for the manufacturing of reinforced concrete constructions are already known. These girders are identified by the REP ® mark, which has been registered in the applicant's name. These girders allow to reinforce substantially horizontal structural members made of reinforced concrete, thus reducing the cost resulting from provisional reinforcing operations, as well as the amount of iron and concrete needed for manufacturing these structural members. Moreover, the placement of the above-mentioned girders does not require skilled labour for manually manufacturing the reinforcing structure on the building site.
  • the girders are usually supported by reinforced concrete pillars in order to manufacture the supporting structure of a construction.
  • the connecting knot between girders and pillars must be strong and in particular the structural continuity between the girders of adjacent bays supported by these pillars must be ensured.
  • Italian patent 1248021 in the applicant's name describes girders whose truss is remarkably longer than the plate longitudinally fixed underneath it, which plate has a length equal to the clear span between the two pillars connected by the girder. In this way the truss may be inserted in the space between the substantially vertical members reinforcing the pillar, thus protruding beyond the pillar in order to go aside the truss of a subsequent girder.
  • the truss of the subsequent girder is longer than the plate underlying it so as to cross the substantially vertical members reinforcing the pillar in order to go over the plate of the first girder.
  • this solution has a drawback that it is difficult to insert the trusses of the girders between the reinforcing members of the pillars. Due to this problem in fact it happens that some workers in the building site must even cut some of the reinforcing members of the pillars in order to form a space in which the trusses of the girders are rested. It is obvious that in this way the structural continuity of the pillar is interrupted, although only partially, thus jeopardizing its static strength characteristics.
  • Short reinforcing members used for reinforcing the knots between girders and pillars are also known, such as for example the short reinforcing members described in Italian patent 1037265.
  • known short reinforcing members have a specifically shaped geometry, are inserted between the members reinforcing the pillars and protrude beyond the pillars extending towards the inside of the girders to be connected.
  • both placing and fixing of these short reinforcing members are laboring operations that require additional time. This results in further manufacturing costs, as well as in a remarkable extension of the manufacturing time.
  • the knot is not provided with a mixed structure comprising prefabricated steel members and concrete, as these short reinforcing members are substantially non-prefabricated reinforcing members that must be subsequently connected to the reinforcing members of the pillar and/or reinforced with cages in a typical way in reinforced concrete constructions.
  • these short reinforcing members are substantially non-prefabricated reinforcing members that must be subsequently connected to the reinforcing members of the pillar and/or reinforced with cages in a typical way in reinforced concrete constructions.
  • the Italian standards tend to discourage the combined use of mixed structures and reinforced concrete structures in order to obtain better structural performances.
  • the above-mentioned known girders are generally comprised of trusses formed of bars having a constant cross-section.
  • the cross-section of the bars is so sized that the girder can withstand the shearing forces proximate to its ends, i.e. proximate to the pillar on which the girder sits. Therefore, the cross-section of said bars is oversized in the centre portion of the girders, where smaller cross-sections would be enough to withstand the bending moment.
  • Known girders thus have the disadvantage of using an excess of material and thereby of being heavier and more expensive than needed. It is therefore an object of the present invention to provide a girder for reinforcing substantially horizontal structural members made of reinforced concrete, which is free from said disadvantages.
  • Another object of the present invention is to provide a method for connecting girders of the above-mentioned type and pillars, with the help of suitable short reinforcing members.
  • a girder comprising at least one prefabricated truss and provided with lateral protrusions at its ends, said protrusions being suitable for supporting short reinforcing members arranged aside and externally to the pillar, the short reinforcing members being intended to reinforce the connecting knot between girders and pillar and to provide continuity from bay to bay.
  • the girders and the short reinforcing members may thus be placed very rapidly for the cast of concrete.
  • a first important advantage of the girder and the method according to the present invention is that the mutual connection between the girders and the connection between the girders and the pillars may be carried out in a very short time and in a cheaper way with respect to the prior art.
  • the girder and the method according to the present invention in fact it is no more necessary to insert any truss into the reinforcing members of the pillars, since the portion of the truss protruding from the flat component of the girder is rapidly placed on the pillar and the short reinforcing members are arranged onto the lateral protrusions of the girder immediately after that, aside and externally to the reinforcing members of the pillar.
  • the above-mentioned short reinforcing members may be e.g. portions of girders having a truss and not requiring the help of further supports in addition to the lateral protrusions of the girder according to the present invention.
  • a second significant advantage of the girder and the method according to the present invention is that the girder may be a "low-profile" girder and the method may be used for connecting said low-profile girders according to the present invention to pillars and consolidating them by using concrete much more rapidly when the short reinforcing members are preferably provided with an L-shaped profile suitable for containing the cast of concrete with no need for a suitable formwork.
  • Another important advantage of the girder and the method according to the present invention is that by arranging short reinforcing members aside the girders and the pillar, the number of members forming the reinforcing core of the girder is increased in correspondence and proximate to the pillar, where the shearing actions are higher. In this way it is possible to use girders with trusses formed of bars having a reduced cross- section, thus lightening the centre portions of the girders where reinforcing bars having a large cross-section are not necessary. Therefore a saving of material and a consequent cost reduction is achieved.
  • figure 1 is a perspective view of a first embodiment of the girder according to the present invention
  • figure 2 shows a second embodiment of the girder according to the present invention
  • figure 3 shows a third embodiment of the girder according to the present invention
  • - figure 4 shows a fourth embodiment of the girder according to the present invention
  • figure 5 shows two girders according to the present invention and a secondary girder that are mounted on a pillar with the help of two short reinforcing members
  • - figure 6 shows two girders according to the present invention that have a low- profile and are mounted on a pillar, only one short reinforcing member being shown
  • figure 7 shows two girders according to another embodiment of the present invention mounted on a
  • Figure 1 shows one end of a girder 1 for reinforcing structural members made of reinforced concrete according to the invention.
  • girder 1 comprises a truss 2.
  • Truss 2 may be connected to an underlying flat component 3 being substantially parallel thereto.
  • Flat component 3 shown in the figure is comprised of a horizontal steel sheet whose side edges 3a, 3b are usually parallel to each other.
  • Flat component 3 is preferably larger than truss 2 so that the ends of horizontal structural members, such as e.g. the so-called "predalles" plates, may be placed onto its side edges 3a, 3b and transversely arranged between girders 1, that are spaced apart and substantially parallel to each other, in order to make slabs or other building surfaces.
  • girder 1 may also be free from the above-described flat component 3.
  • truss 2 is longer than flat component 3 in order to protrude beyond its end 3c.
  • the ends of truss 2 are provided with at least one horizontal profile 2a arranged transversely to girder 1 in order to prevent the girder from overturning to a side and to improve the strength of the connection between the girder and a reinforced concrete pillar once the cast of concrete has been made and consolidated.
  • Truss 2 comprises a plurality of connecting bars 2b, which connect at least one upper longitudinal bar 2c to flat component 3 of girder 1 substantially parallel to each other. Moreover, truss 2 may comprise at least one lower longitudinal bar 2d contacting flat component 3 of girder 1. According to the invention girder 1 is provided with at least one lateral protrusion
  • lateral protrusions 4, 5 are comprised of one bar transversely fixed to girder 1 under upper longitudinal bars 2c. These lateral protrusions 4, 5 are suitable for supporting short reinforcing members for connecting girders to pillars.
  • lateral protrusions 4, 5 are formed of at least one bar fixed transversely to girder 1 underneath end 3c of flat component 3 of girder 1. The bar must be longer than the width of flat component 3 in order to protrude from both its side edges 3 a, 3b.
  • lateral protrusions 4, 5 are flat horizontal fins, which are fixed coplanar to lateral edges 3a, 3b of flat component 3 at its end 3c.
  • FIG. 4 shows a fourth embodiment of girder 1 according to the present invention.
  • Girder 1 is provided with a least one intermediate longitudinal bar 2e, which is arranged between upper longitudinal bars 2c and lower longitudinal bars 2d and is substantially parallel thereto.
  • Intermediate longitudinal bars 2e are provided with a horizontal profile 2a that is arranged transversely to girder 1.
  • the horizontal profile has an anti-overturning function and improves the strength of the connection between girder pillar once the cast of concrete has been carried out.
  • girder 1 shown in figure 4 is provided with a concave profile 6, having a concavity facing upwards, that is fixed under truss 2.
  • Intermediate longitudinal bars 2e are longer than concave profile 6 and their ends are suitable for being placed onto the pillars.
  • lower longitudinal bars 2d are not longer than concave profile 6 and are contained inside it.
  • girder 1 shown in figure 4 is suitable for being placed in a configuration that has a low-profile with respect to the height of the pillar, wherein lower longitudinal bars 2d and concave profile 6 fixed thereto are arranged underneath the plane where the girder sits on the pillar.
  • the ends 6c of concave profile 6 suitable for being arranged in contact with the side wall of the pillar, so that the cast of concrete may be contained in the cavity of concave profile 6 itself with no need for formwork.
  • concave profile 6 may have such a height that its edges 6a, 6b are at the same level of the plane where the girder sits on the pillar and are suitable for supporting the ends of horizontal structural members, such as for example "predalles" plates.
  • Figure 5 shows a reinforced concrete pillar 7 with two girders 1, 1', substantially arranged in the same direction, for reinforcing structural members made of reinforced concrete according to the method of the present invention.
  • the method intended to make a structure continuous from bay to bay, comprises the steps of: - arranging the ends of two girders 1, 1' onto the upper end of a pillar 7, from which substantially vertically reinforcing members 8 protrude, arranging at least one short reinforcing member 9, 10 along the direction of girders 1, 1' in correspondence to pillar 7; and carrying out a cast of concrete.
  • short reinforcing members in the method according to the invention short reinforcing members
  • Reinforcing members 9, 10 are arranged parallel to girders 1, 1' externally to reinforcing members 8 of pillar 7. Reinforcing members 9, 10 may be supported by lateral protrusions 4, 5, 4', 5' that can be associated with the girders as described above.
  • this method allows to overcome the technical prejudice that in mixed structures, as well as in reinforced concrete structures, possible short reinforcing members are internally arranged among the reinforcing members 8 of the pillars.
  • the applicant in fact has surprisingly found that it is possible to make a continuous optimal connection between the girders of a structure in correspondence to the pillars by means of short reinforcing members set aside, thus making girders that are larger than the pillars. Girders being larger than pillars do not jeopardize the structural performances of the structure at all.
  • the method according to the invention is compliant with the present Italian standard, since this provides that the girder may be larger than the pillar and protrude up to one third of its width on both sides of the pillar.
  • lateral protrusions 4, 5, 4', 5' of two girders 1, 1' arranged on a pillar 7 may support short reinforcing members 9, 10.
  • Short reinforcing members 9, 10 shown in the figure are portions of girders formed of a truss hung to lateral protrusions
  • the ends 3c of possible flat members 3, 3', underlying trusses 2, 2' forming girders 1, 1', preferably contact the lateral surface of pillar 7 in order to allow to carry out the cast of concrete without a formwork underlying the girders, thus preventing concrete from passing between flat components 3, 3' and the pillar.
  • FIG 6 an alternative embodiment of the connecting method according to the present invention is shown. It should be noted that for the sake of clarity only two girders 1, 1', one pillar 7 and a single short reinforcing member 10 are shown, whereas no secondary girder is shown. Girders 1, 1' are of the low-profile type shown in figure 4 and sit on pillar 7, the concave profile 6 contacting the lateral surface of pillar 7 itself so that there is no need for any formwork for casting concrete.
  • short reinforcing members 10 may be provided with a shaped concave profile 12 suitable for being arranged in contact with concave profiles 6, 6' of girders 1, 1' and with pillar 7 in order to contain the cast of concrete without the help of a formwork.
  • FIG 7 a further alternative embodiment of the connecting method according to the present invention is shown, by using girders 1, 1' of the type shown in figure 3.
  • short reinforcing members 9, 10 may be externally arranged aside girders 1, 1' and reinforcing members 8 of pillar 7, the short reinforcing members being placed on lateral protrusions 4, 5, 4', 5' formed of horizontal fins.
  • girders 1, 1' of the invention do not disturb and are not encumbered by the thick reinforcing members 8 of a pillar 7, thus anyway allowing to make a solid connection between girders and pillar thanks to short reinforcing members 9, 10 supported by lateral protrusions 4, 5, 4', 5'.
  • reinforcing members 9, 10 may be externally arranged aside girders 1, 1' and pillar 7, thus being directly arranged on the "predalles” plates themselves without the help of lateral supporting protrusions 4, 5, 4', 5'.
  • the above described and illustrated embodiments of the girder and the method for connecting girders to pillars with the help of short reinforcing members according to the invention are only examples susceptible of numerous variations.
  • the girder could be other than straight, e.g. arc-shaped, in order to form architectural vaults.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rod-Shaped Construction Members (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

L'invention porte sur une poutre (1) pour renforcer des éléments structuraux faits en béton renforcé, la poutre comprenant au moins une ferme (2) et comportant au moins une protubérance latérale (4, 5) en correspondance avec ses extrémités. L'invention porte également sur un procédé pour relier deux poutres (1, 1'), qui sont sensiblement agencées le long de la même direction, à un pilier de béton renforcé (7), au moins un élément de renforcement court (9, 10) étant agencé à côté des poutres (1, 1') en correspondance avec le pilier (7).
PCT/EP2008/057760 2007-07-19 2008-06-19 Poutres perfectionnées pour renforcer le béton et procédé pour les relier à des piliers afin de fournir une continuité d'une baie à une autre WO2009010366A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BRPI0814421-4A2A BRPI0814421A2 (pt) 2007-07-19 2008-06-19 Viga, e, método para conectar duas vigas e um pilar.
US12/669,741 US20100170194A1 (en) 2007-07-19 2008-06-19 Girders for reinforcing concrete and method for connecting them to pillars in order to provide continuity from bay to bay
EP08761203A EP2181224A1 (fr) 2007-07-19 2008-06-19 Poutres perfectionnées pour renforcer le béton et procédé pour les relier à des piliers afin de fournir une continuité d'une baie à une autre

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001455A ITMI20071455A1 (it) 2007-07-19 2007-07-19 Travi migliorate per l'armatura del calcestruzzo e metodo per il loro collegamento con pilastri per dare continuita da campata a campata
ITMI2007A001455 2007-07-19

Publications (1)

Publication Number Publication Date
WO2009010366A1 true WO2009010366A1 (fr) 2009-01-22

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PCT/EP2008/057760 WO2009010366A1 (fr) 2007-07-19 2008-06-19 Poutres perfectionnées pour renforcer le béton et procédé pour les relier à des piliers afin de fournir une continuité d'une baie à une autre

Country Status (5)

Country Link
US (1) US20100170194A1 (fr)
EP (1) EP2181224A1 (fr)
BR (1) BRPI0814421A2 (fr)
IT (1) ITMI20071455A1 (fr)
WO (1) WO2009010366A1 (fr)

Cited By (6)

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EP2698484A1 (fr) * 2012-08-13 2014-02-19 Filigran Trägersysteme GmbH & Co. KG Construction en béton avec un support à point
WO2016005660A1 (fr) * 2014-07-11 2016-01-14 Peikko Group Oy Poutre en acier
ITUB20152905A1 (it) * 2015-08-05 2017-02-05 Tecnopan Eng S R L Un nodo per struttura edile ed una struttura edile, del tipo misto acciao-calcestruzzo, comprendente detto nodo
CN108487461A (zh) * 2018-03-20 2018-09-04 东南大学 带有附加钢筋和套筒的预制预应力混凝土框架梁柱节点
IT201700071986A1 (it) * 2017-06-27 2018-12-27 Tecnostrutture Srl Modulo strutturale per un solaio e solaio comprendente detto modulo strutturale
WO2021087267A1 (fr) * 2019-11-01 2021-05-06 Simpson Strong-Tie Company Inc. Support de transfert de cisaillement d'élément en béton

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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
CN103498524A (zh) * 2013-10-15 2014-01-08 南京工业大学 一种带增强型钢筋桁架的叠加板/梁及其支座连接方法
US10119276B2 (en) 2016-07-15 2018-11-06 Richard P. Martter Reinforcing assemblies having downwardly-extending working members on structurally reinforcing bars for concrete slabs or other structures
US11220822B2 (en) 2016-07-15 2022-01-11 Conbar Systems Llc Reinforcing assemblies having downwardly-extending working members on structurally reinforcing bars for concrete slabs or other structures
CN113356370A (zh) * 2021-06-24 2021-09-07 河南绿建建筑科技有限公司 剪力墙及框架柱与混凝土梁牛腿互锚连接施工方法
USD1000418S1 (en) * 2023-06-14 2023-10-03 Bing Qiu Combined phone stand and speaker

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US3158925A (en) * 1956-04-16 1964-12-01 Keystone Steel & Wire Co Method of making a purlin or roof truss
DE1193224B (de) * 1959-06-13 1965-05-20 Rheinbau Gmbh Geschweisster Fachwerktraeger, insbesondere zur Verwendung als Dachsparren
AT331016B (de) * 1974-05-28 1976-07-26 Katzenberger Helmut Trager
DE2501758A1 (de) 1974-09-26 1976-04-15 Salvatore Leone Metalltraeger
IT1037265B (it) 1975-04-14 1979-11-10 Salvatore L Elemento strutturale per assicurare la continuita nei nodi delle armature nelle costruzioni edilizie in cemento armato
FR2491977A1 (fr) * 1980-10-15 1982-04-16 Saret Elements de construction pour ossature de batiment, ossature comprenant ces elements, et procede de construction d'une telle ossature
IT1248021B (it) 1991-06-10 1995-01-05 Salvatore Leone Perfezionamento alle travi metalliche per edilizia del tipo a struttura mista, con anima disassata.
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EP2698484A1 (fr) * 2012-08-13 2014-02-19 Filigran Trägersysteme GmbH & Co. KG Construction en béton avec un support à point
WO2014026781A1 (fr) * 2012-08-13 2014-02-20 Filigran Trägersysteme GmbH & Co. KG Dalle en béton plate ou à éléments soutenue par points
CN104619935A (zh) * 2012-08-13 2015-05-13 菲力格兰运载系统有限两合公司 点支撑构件或混凝土平顶棚
RU2598950C1 (ru) * 2012-08-13 2016-10-10 Филигран Трэгерсистем Гмбх Энд Ко. Кг Точечно опирающееся элементное или плоское бетонное перекрытие
US9469993B2 (en) 2012-08-13 2016-10-18 Filigran Tragersysteme Gmbh & Co. Kg Point-supported element or flat concrete ceiling
WO2016005660A1 (fr) * 2014-07-11 2016-01-14 Peikko Group Oy Poutre en acier
ITUB20152905A1 (it) * 2015-08-05 2017-02-05 Tecnopan Eng S R L Un nodo per struttura edile ed una struttura edile, del tipo misto acciao-calcestruzzo, comprendente detto nodo
IT201700071986A1 (it) * 2017-06-27 2018-12-27 Tecnostrutture Srl Modulo strutturale per un solaio e solaio comprendente detto modulo strutturale
EP3421204A1 (fr) * 2017-06-27 2019-01-02 Tecnostrutture SRL Module structural pour une dalle et dalle comprenant ledit module structural
CN108487461A (zh) * 2018-03-20 2018-09-04 东南大学 带有附加钢筋和套筒的预制预应力混凝土框架梁柱节点
WO2021087267A1 (fr) * 2019-11-01 2021-05-06 Simpson Strong-Tie Company Inc. Support de transfert de cisaillement d'élément en béton

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ITMI20071455A1 (it) 2009-01-20
BRPI0814421A2 (pt) 2015-01-06
US20100170194A1 (en) 2010-07-08

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