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WO2019025928A1 - Ferme modulaire précontrainte à intersections et système de plancher à platelage en béton - Google Patents

Ferme modulaire précontrainte à intersections et système de plancher à platelage en béton Download PDF

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Publication number
WO2019025928A1
WO2019025928A1 PCT/IB2018/055655 IB2018055655W WO2019025928A1 WO 2019025928 A1 WO2019025928 A1 WO 2019025928A1 IB 2018055655 W IB2018055655 W IB 2018055655W WO 2019025928 A1 WO2019025928 A1 WO 2019025928A1
Authority
WO
WIPO (PCT)
Prior art keywords
truss
trusses
floor system
girder
structural floor
Prior art date
Application number
PCT/IB2018/055655
Other languages
English (en)
Inventor
Shahabeddin ZAREGARIZI
Malekhoushang PASHAEI
Original Assignee
Zaregarizi Shahabeddin
Pashaei Malekhoushang
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 Zaregarizi Shahabeddin, Pashaei Malekhoushang filed Critical Zaregarizi Shahabeddin
Publication of WO2019025928A1 publication Critical patent/WO2019025928A1/fr

Links

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
    • E04B5/28—Cross-ribbed floors
    • 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
    • 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
    • E04C3/08—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders
    • E04C3/09—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders at least partly of bent or otherwise deformed strip- or sheet-like material
    • 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
    • E04C3/10—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal prestressed
    • 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
    • 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
    • E04B5/48—Special adaptations of floors for incorporating ducts, e.g. for heating or ventilating
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/06—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members
    • E04B9/065—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members comprising supporting beams having a folded cross-section
    • E04B9/067—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members comprising supporting beams having a folded cross-section with inverted T-shaped cross-section
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/18—Means for suspending the supporting construction
    • 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
    • E04C2003/0491—Truss like structures composed of separate truss elements the truss elements being located in one single surface or in several parallel surfaces
    • 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
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/04—Mats
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E04C5/125—Anchoring devices the tensile members are profiled to ensure the anchorage, e.g. when provided with screw-thread, bulges, corrugations

Definitions

  • the present invention relates to a novel composite floor system. More particularly, it relates to a structural floor system comprising pre-stressed intersecting modular truss and concrete deck for use in various structures.
  • the present technology is directed to a structural floor system for multi-story concrete and steel structure buildings.
  • the invention framework generally comprises a grid of intersecting modular trusses. Each truss is manufactured beforehand in the factory or manufactory in a controlled environment. In the construction field, the trusses are assembled to build the girder trusses. In the next stage, the said trusses erected and mounted on the main beams. Then, the other intersecting trusses attached the girder truss to build a grid of trusses. The connection of each truss to another would be done by using cross-shaped plates and bolted connection.
  • the strand system Before pouring the concrete, by running a wire strand system from the lower cord and the diagonal members of the said girder trusses, the strand system is pulled at the specified force and anchored at the upper chord. The tension induced in the wire strand system pushing the truss grid to run upward leading the reduction in final deflection of the floor system.
  • the wooden or metal formwork is placed between the space of the trusses just below the truss upper cord such that it completely embeds in the concrete.
  • the truss lower cord can be used as a support for the slab formwork.
  • the mesh reinforcement placed on the upper cord of the truss and the concrete is poured. This system can be installed with or without shoring.
  • the present invention brings about a number of advantageous which is described hereunder.
  • An intersecting truss system reduces span of the topping slab, thereby reducing its thickness in comparison with most floor systems that act one-way.
  • the introduction of a strand system installed in the vicinity of some truss members, pre-stress is created prior to the loading of the floor which makes the roof system to behave rigid in out of plane and reduces deflection and vibration during operation.
  • FIG.1 A first figure.
  • FIG.2 describes schematic representation of a modular truss unit and its components FIG.2A
  • FIG.2A is a perspective view of anchorage blocking system
  • FIG.2B is a perspective view of strand clamp used for fastening the wire strand
  • FIG.5 is a perspective view of truss unit, support of fake ceiling and mechanical duct way
  • FIG.l illustrates a perspective view of a floor system and its components.
  • the system generally comprises a plurality of truss-shaped units 1A, placed on perimeter structural beams 16,19, assembly devices 5 for attaching the said units to provide girder trusses IB, a wire strand 6 to introduce the pre-tension to the floor system and the topping concrete slab 25 for gravity and lateral loads bearing.
  • trusses units 1A are arranged is a diagonal pattern which bring more in-plane and out of plane stiffness to the floor system.
  • parallel arrangement of trusses also may be used without departing the scope of this invention.
  • each truss-shaped unit 1A made up of upper cord 1, lower cord 2 and vertical 4 and diagonal 3 members as truss web.
  • U or C- shaped cold-formed profile is used to construct the truss units 1A.
  • cold-formed is preferable due to its higher strength to weight ratio.
  • the length of each truss unit 1A depends on the floor span, but for the transportation and modular design consideration, the maximum length would be around 3 meters. Because the upper 1 and diagonal 3 cord are under compression after loading, the minimum suitable thickness for cold-formed members would be 3 mm. The said minimum thickness not only provide acceptable resistance against different modes of buckling, but it also meets the minimum criterion for corrosion.
  • FIG.2 illustrates a perspective view of a truss unit 1A.
  • the upper cord 1 is placed upwardly to comply the composite section by embedding completely in the slab 25 above, plus, providing a better condition for connection to web members 3,4. likewise, the lower cord 2 is projected downwardly to provide a better condition for connection.
  • the diagonal member 3 consisted of a straight member that is cut and bended from the flange at two sections just at the intersection with the upper cord 1.
  • the vertical members 4 are placed at the specified distance from the edge of each truss unit 1 A in such a way that it be possible to install splice assemblies 5.
  • Triangular space between the members can be used as mechanical or electrical duct way 22.
  • the fake ceiling 23 or its support 24 can be attached to the truss lower cord 2.
  • the unit trusses 1A pre-manufactured in a factory or manufactory and then are shipped to the workshop for installation.
  • Welded or bolted connection 15 can be chosen for connection.
  • holes 26 are created in a regular distance along the span of truss units 1A on either side of flange.
  • the hole 26 can be circular or non-circular. Dimension and Center to center hole spacing would be according to the cross-sectional dimension of members.
  • the passage of slab concrete 25 from said holes 26 leads to the composite action of truss and the concrete slab 25.
  • the assemblage operation starts with splicing the truss units 1A to build the main girder truss IB which, as first stage, is placed diagonally between two columns. Connecting each truss unit 1A to another will be made by using cross-sectional plates 5 and bolted connection 15 in both upper 1 and lower cord 2. It should be noted that attachment of all the cross-sectional edges by splicing assemblies 5 is necessary to accommodate axial force transfer.
  • the said cross-sectional plates 5 are configured four-sided to provide suitable condition for connection in joints.
  • FIG.3 shows a perspective view representing connection of girder truss IB to beam 16 in steel skeleton structures.
  • the connection type can be pinned or rigid utilizing bolted, welded or any other type of connection.
  • the connection provided by seat plate 17 with stiffeners 18 at lower cord while the upper cord 1 is located on the beam flange.
  • the other parallel girder trusses IB put in place according to the mentioned details.
  • the remaining truss units 1A on other direction are attached to girder trusses IB to form a grid of intersecting trusses.
  • FIG.4 shows a perspective view representing connection of girder truss IB to beam 19 in concrete skeleton structures.
  • the upper 1 and lower cord 2 of the truss sit inside the beam 19 during placing the beam rebars 20,21 and then by pouring the concrete, connection is established.
  • using a shoring system can facilitate the process of installation and erection of the truss system.
  • the strand 6 is pulled at the specified force and anchored at the upper chord 1 of the girder trusses 2B.
  • a number of sleeves 12,13 like steel pipe are fitted inside the diagonal 3 and upper cord 2 truss member to ease the process of the said wire strand 6 crossing.
  • the said specific force can be considered equal to the amount of required force needed to neutralize the deflection of gravity load. Applying forces more than that, may be difficult from the construction and cost view point.
  • each wire strand 6 passes through a wedge hole 7 and steel washer 9, located on the upper cord 1 of truss, and then returns back from the other hole and locked along the wire strand 6 by some strand clamps 11, FIG. 2B.
  • the steel washer 9 has five holes, four holes are installed for the passage of each wire strand 6 and the mid one 10 is for the adjusting screw 8.
  • the screw 8 By twisting the screw 8 by a torque-meter the require controlled tension create in the strand system 6, makes the floor system stiffer.
  • the wire strand 6 system also tolerates part of the load, increase the bearing capacity of the floor system.
  • the wooden or metal formwork is placed between the truss quadrangle grid and just below the upper cord 2 so that the upper cord 1 can embed in the slab concrete 25.
  • the lower cord 2 of the truss can be used as supporting for the topping formwork eliminating the overall and large scaffolding under the floor.
  • the mesh reinforcement 14 for concrete deck 25 is placed on the upper cord 1 of the truss.
  • Concrete is poured in accordance with technical specification in the field.
  • each quadrangle forms a four-sided support for the slab 25.
  • the framework provides a two-way slab so the slab is stiffer as compared to the slab with the same slab thickness that have one-way support as a result, the thickness of the topping slab 25 can be reduced.

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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)

Abstract

La présente invention concerne un nouveau système de plancher structural qui comprend généralement un réseau de fermes modulaires à intersections, un système de brin de fil précontraint et un platelage en béton. Des profilés en forme de U ou de C laminés à froid ou à chaud sont utilisés pour former les fermes modulaires préfabriquées. L'assemblage des fermes de manière bidirectionnelle crée un réseau de fermes à intersections. En déplaçant le brin à partir du réseau de fermes, la force de précompression s'applique sur le système de plancher. Un réseau de fermes précontraintes qui accompagne ne dalle en béton armé au-dessus forme un système de plancher structural composite qui est idéal pour un revêtement de sol dans de larges étendues dans des constructions à étages multiples. L'invention concerne également un procédé pour assembler un tel système.
PCT/IB2018/055655 2017-07-30 2018-07-28 Ferme modulaire précontrainte à intersections et système de plancher à platelage en béton WO2019025928A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IR139650140003005303 2017-07-30
IR13963005300 2017-07-30

Publications (1)

Publication Number Publication Date
WO2019025928A1 true WO2019025928A1 (fr) 2019-02-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2018/055655 WO2019025928A1 (fr) 2017-07-30 2018-07-28 Ferme modulaire précontrainte à intersections et système de plancher à platelage en béton

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022033155A1 (fr) * 2020-08-13 2022-02-17 深圳市云光绿建科技有限公司 Structure incurvée de terrain de jeu, procédé d'assemblage et utilisation associée
CN116752680A (zh) * 2023-08-18 2023-09-15 山东同力建设项目管理有限公司 桁架分离式楼板及其施工方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4144686A (en) * 1971-07-22 1979-03-20 William Gold Metallic beams reinforced by higher strength metals

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4144686A (en) * 1971-07-22 1979-03-20 William Gold Metallic beams reinforced by higher strength metals

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022033155A1 (fr) * 2020-08-13 2022-02-17 深圳市云光绿建科技有限公司 Structure incurvée de terrain de jeu, procédé d'assemblage et utilisation associée
CN116752680A (zh) * 2023-08-18 2023-09-15 山东同力建设项目管理有限公司 桁架分离式楼板及其施工方法
CN116752680B (zh) * 2023-08-18 2023-11-10 山东同力建设项目管理有限公司 桁架分离式楼板及其施工方法

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