EP0355103B1 - A method of manufacturing a truss beam - Google Patents

A method of manufacturing a truss beam Download PDF

Info

Publication number
EP0355103B1
EP0355103B1 EP88903297A EP88903297A EP0355103B1 EP 0355103 B1 EP0355103 B1 EP 0355103B1 EP 88903297 A EP88903297 A EP 88903297A EP 88903297 A EP88903297 A EP 88903297A EP 0355103 B1 EP0355103 B1 EP 0355103B1
Authority
EP
European Patent Office
Prior art keywords
carcase
elongate members
flexible elements
spacer plates
flexible
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.)
Expired - Lifetime
Application number
EP88903297A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0355103A1 (en
Inventor
John Grandinetti
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.)
INTEGRATED TECHNOLOGIES Ltd
Original Assignee
INTEGRATED TECHNOLOGIES Ltd
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 INTEGRATED TECHNOLOGIES Ltd filed Critical INTEGRATED TECHNOLOGIES Ltd
Priority to AT88903297T priority Critical patent/ATE70877T1/de
Publication of EP0355103A1 publication Critical patent/EP0355103A1/en
Application granted granted Critical
Publication of EP0355103B1 publication Critical patent/EP0355103B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • 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
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/291—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures with apertured web
    • 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
    • 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
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0413—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several 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
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/0434—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the open cross-section free of enclosed cavities
    • 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
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0465—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section square- or rectangular-shaped
    • 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
    • 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 invention relates to a method of manufacturing a truss beam.
  • Truss beams are commonly made either of steel or of composite material. Steel beams are strong but are very heavy and thus awkward to handle. Comparatively strong beams of composite material are produced in sections using a tool which inevitably increases the cost of manufacture. Furthermore, such beams of composite material have large solid sections which cause the beams to be undesirably heavy.
  • the invention seeks to provide a strong, lightweight truss beam which is easy and cheap to manufacture.
  • GB2047738A discloses a truss beam manufactured from a number of frame bars braced apart by a plurality of internal bracing elements having struts which are inclined to the axes of the frame bars. Wires are wound in zig-zag form around the frame bars.
  • a truss beam having planar plates in combination with inclined bracing elements to increase the beam's resistance to torsion is also disclosed.
  • the amount of material required to produce such a beam is extremely high.
  • the flexible elements are wound around the carcase such that the edges of the spacer plates are contacted by the same some flexible elements between adjacent elongate members.
  • each flexible element is fixed to the carcase at each point of contact therebetween.
  • the elongate members are tubular.
  • the elongate members are of a composite material comprising thermosetting or thermoplastics resin and fibres.
  • the materials used are selected such that their modulii of elasticity, Poisson's ratios and densities have values of the same order.
  • the materials used are selected such that they have modulii of elasticity, Poisson's ratios and densities of substantially the same values.
  • each flexible element is electrically conductive material and preferably has a coating of a thermoplastics material.
  • the flexible elements are made to adhere to the carcase by passing an electrical current therethrough.
  • the spacing of the elongate members of a beam produced according to the method described above allows a beam of low mass per unit length to be produced.
  • the flexible elements contact the elongate members in the plane of each spacer plate in order to press the elongate members towards the spacer plates and retain a close fit therebetween.
  • the beam thus produced then behaves as a single member for mechanical purposes: the flexible elements carry the majority of any stresses which are applied to the beam.
  • the beam is therefore strong and lightweight. It may also be manufactured in substantial lengths, rather than in sections
  • the method according to the invention begins with the manufacture of the carcase 1.
  • Spacer plates 2 of a composite material of glassfibres and a thermoplastics resin are spaced at equal intervals along a shaft or tube 3.
  • the shaft or tube 3 is arranged on a vertically rotatable turntable to increase the accessibility of the beam during manufacture.
  • Elongate members in the form of tubes 4 also of a similar composite material are then arranged in predetermined positions in relation to the spacer plates 2.
  • a plurality of wires 5 is then wound in a predetermined pattern around the carcase 1. This pattern may be a spiral pattern.
  • Each tube 4 is contacted by a wire 5 in the plane of each spacer plate 2.
  • the edges of each spacer plate 2 are crossed by a wire 5 between adjacent tubes 4.
  • Further wires 5′ are then added to increase the stability and strength of the beam.
  • the further wires 5′ are also wound in a spiral pattern, preferably rotating in the opposite direction to the first wires 5.
  • the further wires 5′ also contact the tubes 4 in the plane of each spacer plate 2 and the edges of the spacer plates 2 are each crossed by a wire 5′ between adjacent tubes 4.
  • Each of the wires 5,5′ has a core of electrically conducting material and a coating of a thermoplastics material.
  • the wires 5, 5′ are made to adhere to the carcase 1 by passing a current through the core such that the thermoplastics coating is melted.
  • the thermoplastics resin of the composite material of the tubes 4 and spacer plates 2 is also melted in the region adjacent each point of contact with the wires 5,5′. When the current is cut off and the wires 5,5′ cool, the thermoplastics resin sets joining the wire 5,5′ to the tubes 4 and the spacer plates 2.
  • elongate members described above are tubular, it would be equally acceptable to utilise solid bars of relatively lightweight construction or tubular members filled with foam or synthetic material. Different arrangements of elongate members around the spacer plates are possible: the arrangement shown in the representations is by way of example only. The invention is not limited to elongate members of composite material - it is envisaged that elongate members comprising thin-walled steel or aluminium tubes would also be suitable.
  • the flexible elements may be wires, lines or bands of steel or other metal, or could comprise non-metallic materials of high tensile strength such as carbon- or glass-reinforced resin.
  • the flexible elements may have a coating of a plastics material and may be adhered to the carcase by means other than those described above, e.g. by direct application of heat to to thermoplastics coating.
  • the flexible elements may be fixed to the carcase at either end of the beam or at periodical intervals. The fixing may take any suitable form, e.g. by tying, welding or repeated winding. Patterns other than spirals may be used, provided that the elongate members are contacted by the flexible elements in the plane of each spacer plate.
  • a single flexible element refers to a wire or the like running from one end of the beam to the other. It would, of course, be possible to arrange for successively wound flexible elements to be connected end to end and wound back and forth along the beam.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Laminated Bodies (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • External Artificial Organs (AREA)
  • Glass Compositions (AREA)
  • Inorganic Insulating Materials (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Electronic Switches (AREA)
  • Control Of El Displays (AREA)
  • Moulding By Coating Moulds (AREA)
  • Ropes Or Cables (AREA)
EP88903297A 1987-04-09 1988-04-11 A method of manufacturing a truss beam Expired - Lifetime EP0355103B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88903297T ATE70877T1 (de) 1987-04-09 1988-04-11 Herstellungsverfahren eines fachwerktraegers.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8708500 1987-04-09
GB08708500A GB2204614A (en) 1987-04-09 1987-04-09 Manufacture of a truss beam of composite materials

Publications (2)

Publication Number Publication Date
EP0355103A1 EP0355103A1 (en) 1990-02-28
EP0355103B1 true EP0355103B1 (en) 1991-12-27

Family

ID=10615530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88903297A Expired - Lifetime EP0355103B1 (en) 1987-04-09 1988-04-11 A method of manufacturing a truss beam

Country Status (13)

Country Link
EP (1) EP0355103B1 (da)
JP (1) JPH03500068A (da)
KR (1) KR890700726A (da)
CN (1) CN88102214A (da)
AT (1) ATE70877T1 (da)
AU (1) AU616887B2 (da)
BR (1) BR8807454A (da)
DE (1) DE3867235D1 (da)
DK (1) DK496589A (da)
FI (1) FI894791A0 (da)
GB (1) GB2204614A (da)
NO (1) NO885476L (da)
WO (1) WO1988008064A1 (da)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9312391U1 (de) * 1993-08-14 1993-10-21 Menzel, Hans-Claus, Dr., 70619 Stuttgart Verstrebung der Mittelstütze eines Verbundpfeilers
DE29907874U1 (de) * 1999-05-04 2000-09-14 Hupperich, Werner, 53804 Much Montagevorrichtung für Bauzwecke
AUPQ356699A0 (en) * 1999-10-21 1999-11-11 Bhp Steel (Rp) Pty Ltd A rollable mesh apparatus
AU782363B2 (en) * 1999-10-21 2005-07-21 Onesteel Reinforcing Pty Limited A rollable mesh apparatus
US8919071B2 (en) * 2012-12-19 2014-12-30 Patco, Llc Truss configuration

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3501880A (en) * 1967-11-08 1970-03-24 Lawrence R Bosch Captive column structure
CH636929A5 (de) * 1979-04-18 1983-06-30 Pantex Stahl Ag Gittertraeger fuer den untertag-strecken- und -schachtausbau.
US4566247A (en) * 1983-08-03 1986-01-28 Overbo Gordon I Captive column
DE3436882A1 (de) * 1984-07-27 1986-01-30 Burger, Frank, 8000 München Rahmensystem, insbesondere fuer gestelle und den innenausbau

Also Published As

Publication number Publication date
AU616887B2 (en) 1991-11-14
GB2204614A (en) 1988-11-16
CN88102214A (zh) 1988-10-26
BR8807454A (pt) 1990-05-15
WO1988008064A1 (en) 1988-10-20
DK496589D0 (da) 1989-10-06
FI894791A7 (fi) 1989-10-09
DE3867235D1 (de) 1992-02-06
ATE70877T1 (de) 1992-01-15
DK496589A (da) 1989-10-06
FI894791A0 (fi) 1989-10-09
JPH03500068A (ja) 1991-01-10
NO885476D0 (no) 1988-12-09
NO885476L (no) 1989-02-01
AU1577988A (en) 1988-11-04
KR890700726A (ko) 1989-04-27
EP0355103A1 (en) 1990-02-28
GB8708500D0 (en) 1987-05-13

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