WO1999009267A2 - Precast concrete elements construction system - Google Patents

Precast concrete elements construction system Download PDF

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Publication number
WO1999009267A2
WO1999009267A2 PCT/BR1998/000064 BR9800064W WO9909267A2 WO 1999009267 A2 WO1999009267 A2 WO 1999009267A2 BR 9800064 W BR9800064 W BR 9800064W WO 9909267 A2 WO9909267 A2 WO 9909267A2
Authority
WO
WIPO (PCT)
Prior art keywords
bonding
construction system
precast concrete
fact
accordance
Prior art date
Application number
PCT/BR1998/000064
Other languages
French (fr)
Other versions
WO1999009267A3 (en
Inventor
Moacir Cosmo Rigo
Original Assignee
Moacir Cosmo Rigo
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 Moacir Cosmo Rigo filed Critical Moacir Cosmo Rigo
Publication of WO1999009267A2 publication Critical patent/WO1999009267A2/en
Publication of WO1999009267A3 publication Critical patent/WO1999009267A3/en

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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
    • E04B1/38—Connections for building structures in general
    • E04B1/383—Connection of concrete parts using adhesive materials, e.g. mortar or glue
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • 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
    • E04B1/02—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements
    • E04B1/04—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements the elements consisting of concrete, e.g. reinforced concrete, or other stone-like material
    • 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
    • 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
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
    • 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
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/30—Columns; Pillars; Struts
    • E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
    • E04F11/032—Spiral stairways supported by a central column
    • 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
    • E04B1/19—Three-dimensional framework structures
    • E04B1/1903—Connecting nodes specially adapted therefor
    • E04B1/1912—Connecting nodes specially adapted therefor with central cubical connecting element
    • 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
    • E04B1/19—Three-dimensional framework structures
    • E04B2001/1924—Struts specially adapted therefor
    • E04B2001/1933—Struts specially adapted therefor of polygonal, e.g. square, cross section
    • 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
    • E04B1/19—Three-dimensional framework structures
    • E04B2001/1924—Struts specially adapted therefor
    • E04B2001/1948—Concrete struts
    • 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
    • E04B1/19—Three-dimensional framework structures
    • E04B2001/1957—Details of connections between nodes and struts
    • E04B2001/196—Screw connections with axis parallel to the main axis of the strut
    • 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
    • E04B1/19—Three-dimensional framework structures
    • E04B2001/199—Details of roofs, floors or walls supported by the framework
    • 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
    • E04B1/19—Three-dimensional framework structures
    • E04B2001/1993—Details of framework supporting structure, e.g. posts or walls

Definitions

  • the state of the art for construction of industrial, commercial or residential buildings comprises one or more of the following techniques: A. Erection of wooden or steel molds for columns, beams or floors, having internal steel reinforcing structures assembled at the construction site, with wooden or steel scaffolding to hold the molds in place during the hardening of the concrete.
  • the concrete - mixed at the construction site or provided by na external plant - is poured into said molds.
  • the internal and external walls are later built with bricks or blocks masonry.
  • B. Employing precast concrete members provided by specialized plants, said members fitting together, with diverse cross-sections and shapes, usually very heavy, positioned by simple superposition without bonding between members, requiring cranes for hoisting into transportation means or erection at the construction site. Walls are also built by means of bricks or blocks.
  • the present invention aims to expedite construction work with a corresponding cost reduction.
  • a framework structure comprising pre-cast structural members joined by bonding means, said pre-cast structural members being provided with at least one thick bonding plate attached to said pre-cast structural members' internal structural reinforcement bars by welding or achoring means.
  • said bonding means comprise thick steel bonding pieces provided with joining means for mutually aligning and joining two or more pre-cast structural members.
  • said bonding plate is made of steel, stainless steel, aluminum or other suitable material.
  • said bonding plate is provided with at least one threaded fastening means.
  • said pre-cast members can be shaped as hollow ducts or tunnels.
  • Figure 1 shows a general perspective view of me proposed system, according to the principles of the invention.
  • Figure 2 shows two examples example of the utilization of the bonding piece shown in Fig. 4 when joining several structural members, according to the principles of the invention.
  • Figure 3 shows an example of a large-scale modular structure built from pre-cast elements according to the principles of the invention.
  • Figure 4 shows an exemplificative embodiment of the bonding piece, according to the principles of the invention.
  • Fig. 5 shows several possible embodiments and shapes of bonding plates, according to the principles of the invention.
  • Fig. 6 shows in greater detail the several possible dimensions and positions of the bonding plate, as well as an example of the attachment of said plate to the internal reinforcing structure.
  • Fig. 7 shows modular members with built-in apertures, according to the principles of the invention.
  • Fig. 8 shows the employment of angle braces to align the structural members during assembly of a framework structure.
  • Fig. 9 shows the detail of the bonding plates used in butt-joined partition pre-cast members.
  • the present invention comprises pre-cast structural members having a plurality of modular shapes, such as columns 1, beams 2, vertical partition elements 3, horizontal floor elements 4, and arcuate elements 5.
  • Bonding plates may be attached to the ends of beams and columns, such as 6 in figures 1 and 2.
  • FIG. 2 when the members are joined by their extremities, said joining is accomplished by bonding plates 6 attached to the extremity of said members and having their external surface perpendicular to the main axis of the structural member to which they belong, being welded in the example shown, to the reinforcement rods 7.
  • butt joining of members can be done by direct contact between the bonding plates, such as shown by 18 in Fig. 1.
  • said structural members can be provided with at least one bonding plate flush with a lateral, top or bottom face, such as 15 in Fig. 1 or 6' in Fig. 6; the bonding plate may be as long as the structural member as shown in 16 in Figures 1 and 6, allowing adaptations in the placement of structural members, such as the column 16' in Fig. 1.
  • Fig. 1 allows me construction of modular column footings, allowing enlargement of the original footing area when more storeys are added to the original structure, by means of members 13 clustered around the original footing. This system also allows joining members with different cross- sections, such as round and square, in junction 20 (Fig. 1).
  • the bonding plates can be any convenient shape, not limited to rectangular or square, as exemplified in Fig. 5, where some of the possible shapes are depicted.
  • Said plates having attaching means, usually embodied as one hole, centrally located.
  • a threaded nut 8 is aligned with said hole and attached by welding to the inside surface of said plate, when this plate is metallic.
  • Figure 4 shows the bonding piece 9 shaped like a hollow cube minus one face, having a through-hole substantially centrally located on each face, the external surface of each face being juxtaposed to a beam's or columns' s bonding plate by means of a bolt 22 (shown in Figures 2, 2- a) which slidingly fits inside said through-hole and engages the threaded nut 8 welded behind each end-plate.
  • a bolt 22 shown in Figures 2, 2- a
  • disassembly is performed by removing said bolts.
  • the bolt is used only for aligning the pieces that are to be joined, being withdrawn after said joining operation, e.g., by welding. In such cases, the bonding piece 9 can also be removed after the joining operation.
  • bonding plate edges can be bevelled to improve joining conditions, mainly when welding is employed, such as in the welding of plates 19 when joining partition modular pieces 3.
  • the bonding piece is shown embodied as a hollow cube, or better, as a hollow prism with a square cross-section, other cross-section shapes having non-parallel sides can be used, such as a hollow triangular or trapezoidal prisms.
  • An example of the use of hollow triangular prismatic bonding pieces would be in assembling two-dimensional lattice beams or trusses such as 14 on Fig. 1.
  • Heavy gauge steel plate is usually used for said pieces, although other materials may be used, the joining means not being restricted to bolting or soldering, but comprising other processes, such as high-strength adhesive allowing the use of plastic bonding pieces and plates.
  • high-strength adhesive allowing the use of plastic bonding pieces and plates.
  • the bonding pieces are not prism-shaped, but have hollow tri-dimensional polyhedric shapes, e. g. with non- parallel faces, to allow construction of tri-dimensional lattice structures, e.g. Fuller domes.
  • Large scale modules can also be constructed with the system if the invention, such as the hollow tunnel shown in Fig. 3, or one-piece aqueduct modular sections joined by welding, according to the principle of the invention.
  • the pre-cast structural members may be produced at specialized plants or at the construction site, due to the simplicity of the molds and templates.
  • Ducts 11 can be embedded in said structural members, for water or electric cables or even for prestressing rods.
  • Either conventional or synthetic concrete can be used, with or without the admixture of additives, dyes or thermal or acoustical insulating materials, said synthetic concrete employing polyester, epoxy or other cold- setting synthetic resins as binders in a matrix of fiberglass, and using as aggregates crushed stone, expanded clay, or hollow plastic beads.
  • Synthetic concrete uses reinforcing steel bars or other materials such as, for example, glass- or carbon-fiber or kevlar, etc.. in the same way as conventional concrete. Production of pre-cast members with this material uses conventional concrete molds, setting takes a few hours and the completed members weigh less than conventional concrete ones. Members constructed according to this technique may be translucent for inside lighting purposes, or colored.
  • this system accelerates the construction work and saves manpower, besides allowing the addition of columns, beams and partitions to existing buildings.
  • Additions can be made to an existing framework structures either horizontally or vertically.
  • This system allows said additions to be made to conventional structural steel buildings, as the bonding plates can be attached by welding to the existing steel beams and columns.
  • the versatility of the pre-cast elements built according to the present system allow the construction of asymmetrical building portions, such as overhanging roofs or marquees, stairsteps, decorative elements, furniture.
  • Fig. 7 shows a staircase built from pre-cast elements, joined to the central column by bonding plates according to the invention.
  • This figure also shows a bus-stop shelter having a decorative central aperture which can be protected by a translucent material sheet such as polycarbonate.
  • Fig. 8 shows the employment of angle braces to align the structural members during sequential assembly of a linear framework structure, said braces being withdrawn after the bonding operation between structural members is completed.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Panels For Use In Building Construction (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

Precast concrete elements construction system, comprising two or more precast structural members having at least one steel bonding plate (6) provided with threaded joining means substantially centrally located and at least one hollow polyhedric bonding piece (9) provided with a through hole substantially located in each face, the external surfaces of said steel bonding plates (6) being juxtaposed to the external surfaces of each face of said bonding piece (9), said threaded bonding means of each bonding plate (6) being in substantial alignment with said through hole of the corresponding bonding piece's (9) face, said members being joined either to the bonding piece (9) by permanent or temporary joining means, or to each other by permanent joining means. Said structural members comprise among others, columns (1), beams (2), vertical and horizontal partition modules (3), modular floor slabs.

Description

PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM
The state of the art for construction of industrial, commercial or residential buildings comprises one or more of the following techniques: A. Erection of wooden or steel molds for columns, beams or floors, having internal steel reinforcing structures assembled at the construction site, with wooden or steel scaffolding to hold the molds in place during the hardening of the concrete. The concrete - mixed at the construction site or provided by na external plant - is poured into said molds. The internal and external walls are later built with bricks or blocks masonry. B. Employing precast concrete members provided by specialized plants, said members fitting together, with diverse cross-sections and shapes, usually very heavy, positioned by simple superposition without bonding between members, requiring cranes for hoisting into transportation means or erection at the construction site. Walls are also built by means of bricks or blocks. C. Erecting a framework of steel beams and columns joined by rivets or welding. Floors and walls do not use the same material.
All the above techniques possess several drawbacks, such as excess weight, long construction time, waste of materials, design constraints, as well as restrictions for alterations or additions to the original building, either during construction or at a later date.
The present invention aims to expedite construction work with a corresponding cost reduction.
The above mentioned purpose is achieved by means of a framework structure comprising pre-cast structural members joined by bonding means, said pre-cast structural members being provided with at least one thick bonding plate attached to said pre-cast structural members' internal structural reinforcement bars by welding or achoring means.
According to another feature of the invention, said bonding means comprise thick steel bonding pieces provided with joining means for mutually aligning and joining two or more pre-cast structural members. According to another feature of the invention, said bonding plate is made of steel, stainless steel, aluminum or other suitable material.
According to yet another feature of the invention, said bonding plate is provided with at least one threaded fastening means. According to yet another feature of the invention, said pre-cast members can be shaped as hollow ducts or tunnels.
The details, further features and advantages of the present invention will be better understood from the following detailed description of preferred embodiments, when considered with the accompanying drawings wherein: Figure 1 shows a general perspective view of me proposed system, according to the principles of the invention.
Figure 2 shows two examples example of the utilization of the bonding piece shown in Fig. 4 when joining several structural members, according to the principles of the invention. Figure 3 shows an example of a large-scale modular structure built from pre-cast elements according to the principles of the invention.
Figure 4 shows an exemplificative embodiment of the bonding piece, according to the principles of the invention.
Fig. 5 shows several possible embodiments and shapes of bonding plates, according to the principles of the invention.
Fig. 6 shows in greater detail the several possible dimensions and positions of the bonding plate, as well as an example of the attachment of said plate to the internal reinforcing structure.
Fig. 7 shows modular members with built-in apertures, according to the principles of the invention.
Fig. 8 shows the employment of angle braces to align the structural members during assembly of a framework structure.
Fig. 9 shows the detail of the bonding plates used in butt-joined partition pre-cast members. Referring now more specifically to Figure 1, the present invention comprises pre-cast structural members having a plurality of modular shapes, such as columns 1, beams 2, vertical partition elements 3, horizontal floor elements 4, and arcuate elements 5. Bonding plates may be attached to the ends of beams and columns, such as 6 in figures 1 and 2. As shown in Fig. 2, when the members are joined by their extremities, said joining is accomplished by bonding plates 6 attached to the extremity of said members and having their external surface perpendicular to the main axis of the structural member to which they belong, being welded in the example shown, to the reinforcement rods 7. In permanent structures, butt joining of members can be done by direct contact between the bonding plates, such as shown by 18 in Fig. 1.
Besides said bonding plates, said structural members can be provided with at least one bonding plate flush with a lateral, top or bottom face, such as 15 in Fig. 1 or 6' in Fig. 6; the bonding plate may be as long as the structural member as shown in 16 in Figures 1 and 6, allowing adaptations in the placement of structural members, such as the column 16' in Fig. 1.
The system shown in Fig. 1 allows me construction of modular column footings, allowing enlargement of the original footing area when more storeys are added to the original structure, by means of members 13 clustered around the original footing. This system also allows joining members with different cross- sections, such as round and square, in junction 20 (Fig. 1).
The bonding plates can be any convenient shape, not limited to rectangular or square, as exemplified in Fig. 5, where some of the possible shapes are depicted. Said plates having attaching means, usually embodied as one hole, centrally located. As shown in Fig. 2 and Fig. 2-a, a threaded nut 8 is aligned with said hole and attached by welding to the inside surface of said plate, when this plate is metallic. Figure 4 shows the bonding piece 9 shaped like a hollow cube minus one face, having a through-hole substantially centrally located on each face, the external surface of each face being juxtaposed to a beam's or columns' s bonding plate by means of a bolt 22 (shown in Figures 2, 2- a) which slidingly fits inside said through-hole and engages the threaded nut 8 welded behind each end-plate. In temporary buildings or structures, disassembly is performed by removing said bolts. For permanent attachements, the bolt is used only for aligning the pieces that are to be joined, being withdrawn after said joining operation, e.g., by welding. In such cases, the bonding piece 9 can also be removed after the joining operation.
As shown in Fig. 9, bonding plate edges can be bevelled to improve joining conditions, mainly when welding is employed, such as in the welding of plates 19 when joining partition modular pieces 3. Although the bonding piece is shown embodied as a hollow cube, or better, as a hollow prism with a square cross-section, other cross-section shapes having non-parallel sides can be used, such as a hollow triangular or trapezoidal prisms. An example of the use of hollow triangular prismatic bonding pieces would be in assembling two-dimensional lattice beams or trusses such as 14 on Fig. 1. Heavy gauge steel plate is usually used for said pieces, although other materials may be used, the joining means not being restricted to bolting or soldering, but comprising other processes, such as high-strength adhesive allowing the use of plastic bonding pieces and plates. When bonding is performed by high-strenght adhesive, said plates' surfaces can be roughened to improve bonding conditions.
In another embodiment of the invention, the bonding pieces are not prism-shaped, but have hollow tri-dimensional polyhedric shapes, e. g. with non- parallel faces, to allow construction of tri-dimensional lattice structures, e.g. Fuller domes. Large scale modules can also be constructed with the system if the invention, such as the hollow tunnel shown in Fig. 3, or one-piece aqueduct modular sections joined by welding, according to the principle of the invention.
The pre-cast structural members may be produced at specialized plants or at the construction site, due to the simplicity of the molds and templates. Ducts 11 can be embedded in said structural members, for water or electric cables or even for prestressing rods.
Either conventional or synthetic concrete can be used, with or without the admixture of additives, dyes or thermal or acoustical insulating materials, said synthetic concrete employing polyester, epoxy or other cold- setting synthetic resins as binders in a matrix of fiberglass, and using as aggregates crushed stone, expanded clay, or hollow plastic beads. Synthetic concrete uses reinforcing steel bars or other materials such as, for example, glass- or carbon-fiber or kevlar, etc.. in the same way as conventional concrete. Production of pre-cast members with this material uses conventional concrete molds, setting takes a few hours and the completed members weigh less than conventional concrete ones. Members constructed according to this technique may be translucent for inside lighting purposes, or colored.
In adverse climatic conditions or when time is short, this system accelerates the construction work and saves manpower, besides allowing the addition of columns, beams and partitions to existing buildings.
Additions can be made to an existing framework structures either horizontally or vertically. This system allows said additions to be made to conventional structural steel buildings, as the bonding plates can be attached by welding to the existing steel beams and columns. The versatility of the pre-cast elements built according to the present system allow the construction of asymmetrical building portions, such as overhanging roofs or marquees, stairsteps, decorative elements, furniture. Fig. 7 shows a staircase built from pre-cast elements, joined to the central column by bonding plates according to the invention. This figure also shows a bus-stop shelter having a decorative central aperture which can be protected by a translucent material sheet such as polycarbonate.
Fig. 8 shows the employment of angle braces to align the structural members during sequential assembly of a linear framework structure, said braces being withdrawn after the bonding operation between structural members is completed.

Claims

CLAIMS 1. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, characterized by a framework structure comprising pre-cast structural members joined by bonding means, said pre-cast structural members being provided with at least one bonding plate having its surface flush with any of the structural members surface, said bonding plate being attached, to said pre-cast structural members' internal structural reinforcement elements.
2. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 1, characterized by the fact that said bonding plates are made of metal.
3. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 1, characterized by the fact that said bonding means comprise welding between metallic bonding plates.
4. PRECAST CONCRETE ELEMENTS CONSTRUCTION
SYSTEM, in accordance with Claim 1, characterized by the fact that the bonding means between bonding plates comprise high-strength adhesive.
5. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 1, characterized by ύie fact that said bonding means comprise a bonding piece shaped as a hollow polyhedron having at least one through-hole in each face.
6. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 1, characterized by the fact that said bonding plate is provided with at least one threaded bonding means.
7. PRECAST CONCRETE ELEMENTS CONSTRUCTION
SYSTEM, in accordance with Claim 6, characterized by the fact that said threaded bonding means comprise a threaded nut attached to the internal face of said bonding plate, substantially aligned with a through-hole in said plate.
8. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 6, characterized by the fact that said bonding means comprise disassemblable bonding means provided by a bolt slidingly fitted in said bonding piece's face through hole and engages in said bonding plate's threaded bonding means, said bonding pieces' s external surface being in contact with said bonding plate's surface.
9. PRECAST CONCRETE ELEMENTS CONSTRUCTION
SYSTEM, in accordance with Claim 5, characterized by the fact that said polyhedron is shaped like a hollow prism having a square cross-section.
10. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 5, characterized by the fact that said polyhedron is shaped like a hollow prism having a non-square cross-section.
11. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 1, characterized by the fact that said precast structural members can have any shape, including hollowed-out ones.
12. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 1, characterized by the fact that said bonding plates are attached to said pre-cast structural members' internal structural reinforcement elements by welding.
13. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 1, characterized by the fact that said bonding plates are attached to said pre-cast structural members' internal structural reinforcement elements by anchoring.
14. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 1, characterized by the fact that said concrete consists of synthetic concrete comprising cold-setting synthetic resins as binders in a matrix of fiberglass, and using as aggregates crushed stone, expanded clay, or hollow plastic beads, as well as internal reinforcing elements.
15. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 1, characterized by the fact that said synthetic concrete internal reinforcing elements are non-metallic.
16. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 1, characterized by the fact that said concrete comprises cold-setting synthetic resins as binders in a matrix of fiberglass, and using as aggregates crushed stone, expanded clay, or hollow plastic beads.
17. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, in accordance with Claim 1, characterized by the fact that said precast structural members comprise hollow large-dimension channels or tunnels.
18. PRECAST CONCRETE ELEMENTS CONSTRUCTION SYSTEM, comprising two or more pre-cast structural members having at least one steel bonding plate provided with threaded joining means substantially centrally located and at least one hollow polyhedric bonding piece provided with a through hole substantially located in each face, the external surfaces of said steel bonding plates being juxtaposed to the external surfaces of each face of said bonding piece, said threaded bonding means of each bonding plate being in substantial alignment with said through hole of the corresponding bonding piece's face, said alignment being provided by a threaded bolt slidingly fitted inside said through-hole and engages said threaded bonding means.
PCT/BR1998/000064 1997-08-20 1998-08-19 Precast concrete elements construction system WO1999009267A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI9702778 1997-08-20
BR9702778A BR9702778A (en) 1997-08-20 1997-08-20 Construction system for premolded and additional elements

Publications (2)

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WO1999009267A2 true WO1999009267A2 (en) 1999-02-25
WO1999009267A3 WO1999009267A3 (en) 1999-12-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10247388A1 (en) * 2002-10-07 2004-04-22 Unterberg, Hartmut, Dipl.-Ing. (FH) Standardized, self-supporting support structure for single is designed so that it can be expanded at any time in horizontal and vertical extents by direct connecting of additional modules to base module
JP2017155462A (en) * 2016-03-01 2017-09-07 鹿島建設株式会社 Joining method of precast concrete structural member

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2225639A1 (en) * 1972-05-26 1973-12-06 Salzgitter Peine Stahlwerke COMPONENT, IN PARTICULAR CONSTRUCTION
DE2321643B2 (en) * 1973-04-28 1975-02-27 Hochtief Ag Fuer Hoch- Und Tiefbauten Vorm. Gebr. Helfmann, 4300 Essen Reinforced concrete column
GB1546946A (en) * 1975-03-19 1979-05-31 Bisutti G Concrete pile coupling device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2225639A1 (en) * 1972-05-26 1973-12-06 Salzgitter Peine Stahlwerke COMPONENT, IN PARTICULAR CONSTRUCTION
DE2321643B2 (en) * 1973-04-28 1975-02-27 Hochtief Ag Fuer Hoch- Und Tiefbauten Vorm. Gebr. Helfmann, 4300 Essen Reinforced concrete column
GB1546946A (en) * 1975-03-19 1979-05-31 Bisutti G Concrete pile coupling device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10247388A1 (en) * 2002-10-07 2004-04-22 Unterberg, Hartmut, Dipl.-Ing. (FH) Standardized, self-supporting support structure for single is designed so that it can be expanded at any time in horizontal and vertical extents by direct connecting of additional modules to base module
JP2017155462A (en) * 2016-03-01 2017-09-07 鹿島建設株式会社 Joining method of precast concrete structural member

Also Published As

Publication number Publication date
BR9702778A (en) 1999-04-27
WO1999009267A3 (en) 1999-12-23

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