EP0246560A2 - Herstellungsverfahren für vorgespannte Stahlträger und fertiggestellte Träger - Google Patents

Herstellungsverfahren für vorgespannte Stahlträger und fertiggestellte Träger Download PDF

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Publication number
EP0246560A2
EP0246560A2 EP87106972A EP87106972A EP0246560A2 EP 0246560 A2 EP0246560 A2 EP 0246560A2 EP 87106972 A EP87106972 A EP 87106972A EP 87106972 A EP87106972 A EP 87106972A EP 0246560 A2 EP0246560 A2 EP 0246560A2
Authority
EP
European Patent Office
Prior art keywords
sections
prepared
frames
bending
constituted
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.)
Withdrawn
Application number
EP87106972A
Other languages
English (en)
French (fr)
Other versions
EP0246560A3 (de
Inventor
Jean-Baptiste Schleich
Raymond Baus
Willy Chapeau
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.)
Aitn Sprl
Arcelor Luxembourg SA
Original Assignee
Aitn Sprl
Arbed SA
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 Aitn Sprl, Arbed SA filed Critical Aitn Sprl
Publication of EP0246560A2 publication Critical patent/EP0246560A2/de
Publication of EP0246560A3 publication Critical patent/EP0246560A3/de
Withdrawn legal-status Critical Current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
    • E04C3/04—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
    • 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
    • E04C2003/0452—H- or I-shaped

Definitions

  • the invention relates to prestressed steel beams.
  • the main idea pursued in the design of prestressed beams is to increase the load capacity when the beam is stressed under bending.
  • Belgian patent no. 495.318 teaches to manufacture a prestressed reinforced concrete beam, by first subjecting the uncoated metal reinforcement to bending, then coating with concrete at least a fraction of the part of the reinforcement subjected to traction. as a result of bending, by maintaining flexed the concrete-coated reinforcement during the curing thereof and finally suppressing the bending force after curing of the concrete.
  • the frame is constituted by a laminated steel beam.
  • the bending is carried out either by the application of a force at a point of the reinforcement lying between the ends which are kept fixed, or by the application of forces at the ends of the beam of which an intermediate point is kept fixed.
  • Pre-stressed beams are obtained in this way where the prestressing is carried out using a partial concrete coating.
  • Such beams are known under the name PREFLEX in the fields of heavy construction, bridges or viaducts.
  • a first disadvantage inherent in such achievements is the excess weight attributable to concrete; a second disadvantage is due the fact that the coating concrete itself must be reinforced and that the steel reinforcements must be fixed by welding to the main reinforcement, i.e. to the steel beam, which involves a tedious work of fitting and welding and impossible to carry out automatically. Finally, a third disadvantage arises from the fact that the coating covers the steel, so that it is difficult to carry out drilling at these places in the beam and impossible to carry out welding work.
  • the object of the invention is to create prestressed beams, free from the disadvantages described.
  • One of the sections could also be heated to temporarily lengthen it. In both cases it is conceivable to constitute a prestressed beam, but it would be necessary to implement enormous means of traction, resp. heating, if you want to build large prestressed beams beyond the mini-sections.
  • the two sections according to measure a) can for example be two T-shaped sections which, after assembly, give an I-shaped section.
  • the two sections according to measure a) can also for example be two I-shaped sections
  • the assembly in question is done according to measure b), by framing the two sections using several steel frames, as will be explained below.
  • Measure c provides that a bending force is applied to the assembly comprising the two sections affixed to each other and framed. This can be achieved by applying two equal forces and in the same direction at the ends of one of the sections, while supports are provided at quarters or thirds of a span at the other section. It is essential that the frames are dimensioned so that the assembly constituted by the two T-shaped sections, affixed to form an I, is immobilized in the sense that when the bending forces are applied, the two sections behave as much as possible as a whole beam, i.e. that only the adjacent areas can move towards each other by sliding one over the other.
  • Measure d is advantageously carried out using a mobile and automated electric welding device.
  • Fig. 1 we distinguish the two T-shaped sections 1 and 2 which can for example be obtained by cutting an I-shaped beam.
  • the sections are kept in position such that areas 11 resp. 21 are adjacent. In practice, these areas can be touched resp. be at a distance of the order of 2 to 5 mm from each other, to avoid difficulties during subsequent welding.
  • the sections are maintained by executives; in the case of four frames for example, the two frames 3 and 4 are arranged at the ends of the sections, while the two frames 5 and 6 are arranged at quarter spans.
  • the lower section 2 is shorter than the upper section 1, to take account of the changes in length occurring during the bending; the appearance of the flexed assembly is indicated by the dotted lines.
  • the bending forces F are applied to the frames 3 and 4; they are taken up at supports A by frames 5 and 6.
  • Frames 3, 4, 5 and 6 are identical from the point of view of their construction, their arrangement however varies according to their role.
  • the frames 3 and 4 are arranged so that the opening is directed downward, while the frames 5 and 6 are arranged upside down; the application of the forces resp. reactions to pressing with arrows to illustrate where the frames are used.
  • the frame concept welding is easily carried out using an automatic welder.
  • the welder S moves on a U-shaped profile 7 which is supported at the location corresponding to FIG. 2 on the lower part of the frame and at the place corresponding to FIG. 3 on the sole of section 2, via a hatched bar which compensates for the difference in level.
  • chamfers are provided, preferably at the end of the upper section.
  • Fig. 5 there is shown a suitable chamfer in the case of beams with thick webs.
  • the chamfer shown in fig. 6 .
  • the sections can also be joined by gluing (see F ig. 7 ).
  • gluing see F ig. 7 .
  • use is advantageously made of steel plates 73 bonded to the cores of sections 71 and 72 and this over their entire length.
  • a prestressed steel beam is obtained, part of which is in tension and the other in compression.
  • Such a beam can support a higher maximum load than a laminated beam of the same dimension, since the part of the beam in tension supports the compressive forces and the part in compression supports the tension forces.
  • Fig.10 One of the possible applications is shown in Fig.10 where there is a prestressed and welded beam 100 supporting a slab 101 in reinforced concrete.
  • the slab-beam connection is made using bolts 102.
  • the T-sections used to form the beam have different transverse dimensions, the smallest section being in contact with the slab.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP87106972A 1986-05-23 1987-05-14 Herstellungsverfahren für vorgespannte Stahlträger und fertiggestellte Träger Withdrawn EP0246560A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU86442 1986-05-23
LU86442A LU86442A1 (fr) 1986-05-23 1986-05-23 Procede de fabrication de poutrelles precontraintes en acier

Publications (2)

Publication Number Publication Date
EP0246560A2 true EP0246560A2 (de) 1987-11-25
EP0246560A3 EP0246560A3 (de) 1989-11-15

Family

ID=19730708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87106972A Withdrawn EP0246560A3 (de) 1986-05-23 1987-05-14 Herstellungsverfahren für vorgespannte Stahlträger und fertiggestellte Träger

Country Status (6)

Country Link
EP (1) EP0246560A3 (de)
JP (1) JPS62280440A (de)
DE (1) DE3716833A1 (de)
FR (1) FR2598947A1 (de)
GB (1) GB2190611A (de)
LU (1) LU86442A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1179105A4 (de) * 1999-09-03 2003-08-27 Min Se Koo Methode zur herstellung von vorgebogenen balken

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9109254D0 (en) * 1991-04-30 1991-06-19 Carnall Mark Prestressed steel joist
GB2294064B (en) * 1994-10-10 1998-02-18 James Arthur Quinn Low modulus of elasticity lintel
GB2306445B (en) * 1995-10-20 1998-12-23 Fruehauf Crane Ltd Improvements to containers
CN100371614C (zh) * 2005-09-06 2008-02-27 清华大学 一种预应力坎合连接方法
GB201114438D0 (en) * 2011-08-22 2011-10-05 Airbus Operations Ltd A method of manufacturing an elongate component
PL4031259T3 (pl) 2019-09-16 2025-10-20 Great Coasters International, Inc. Tor dla wagoników kolejki górskiej

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT139335B (de) * 1933-06-06 1934-11-10 Maximilian Ing Sachs Eiserner Träger.
GB504933A (en) * 1937-10-29 1939-05-01 Max Meltz An improved metal section for use in the construction of motor vehicle bodies and other purposes
GB680022A (en) * 1950-01-18 1952-10-01 Braithwaite & Company Engineer Improvements in and relating to elements for use in constructional engineering
DD26379A1 (de) * 1959-02-20 1964-04-15 Auf Biegung beanspruchter vorgespannter Vollwandträger für Baustoffe mit gleicher Zug- und Druckfestigkeit
DE1527358B2 (de) * 1959-05-13 1977-06-02 Ausscheidung aus: 16 90 760 Stahlwerke Peine-Salzgitter AG, 3150 Peine Vorrichtung zum herstellen von bogen-wabentraegern
CH429095A (de) * 1963-01-22 1967-01-31 Intercontinentale Technik Ges Vorgedrücktes, aus Metall bestehendes Konstruktionsglied und Verfahren zu dessen Herstellung
US3605360A (en) * 1969-04-24 1971-09-20 Skuli Walter Lindal Prestressed vertically laminated beam of wood

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1179105A4 (de) * 1999-09-03 2003-08-27 Min Se Koo Methode zur herstellung von vorgebogenen balken

Also Published As

Publication number Publication date
LU86442A1 (fr) 1987-12-16
EP0246560A3 (de) 1989-11-15
FR2598947A1 (fr) 1987-11-27
JPS62280440A (ja) 1987-12-05
DE3716833A1 (de) 1987-11-26
GB2190611A (en) 1987-11-25
GB8711416D0 (en) 1987-06-17

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Inventor name: SCHLEICH, JEAN-BAPTISTE