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
  • E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
  • E04C3/294—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete of concrete combined with a girder-like structure extending laterally outside the element
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
  • E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
  • E01D2/02—Bridges characterised by the cross-section of their bearing spanning structure of the I-girder type
• • 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
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
  • E01D2101/00—Material constitution of bridges
  • E01D2101/20—Concrete, stone or stone-like material
  • E01D2101/24—Concrete
  • E01D2101/26—Concrete reinforced
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
  • E01D2101/00—Material constitution of bridges
  • E01D2101/30—Metal

Definitions

• This invention relates to a beam construction composed of a steelbeam roller or a welded steel beam and a concrete slab resting on the steel beam and bonded to the same with suffi ⁇ cient rigidity as to restrain the shear stresses developed from the load.
• the concrete slab together with the steel area above the neu ⁇ tral axis of the composite beam forms the zone of compression of the composite beam. More especially the invention relates to beams in which the concrete slab constitutes the floor when the composite members are spaced in accordance with load and span.
• the shrinking produces a bending moment in the composite beam with tensile stresses in the concrete slab and in the bottom flange of the steel beam. In the top flange the shrinking produces compressive stresses but all these shrink- ing stresses diminish when the composite beam is loaded with use ⁇ ful load.
• the main object of the improved composite beam is tb secure the connection between the concrete slab and the top flange of the steel beam with sufficient rigidity so as to develop the same de- formation in the concrete slab as in the steel in compression.
• the invention has two embodiments:
• FIG. 1 is a cross section in line A - A on the Figure 2 of the single-symmetrical welded beam with the ridges across the flange on both sides.
• Figure 2 is a vertical section view on the line B - B of Figure 1 of the welded steel beam and the concrete slab.
• Figure 3 shows a vertical section view in detail C on Figure 2 of the profiling of the top flange.
• the distance between the screws varies in relation to the shearing forces between the concrete slab and the steel beam.
• Figure 4 is a cross section in the line D - D on Figure 5 of a rol- led steel beam with the two one-sided profiled steel plates tightly screwed onto the top flange, and the concrete slab.
• Figure 5 is a vertical cross section view on the line E - E on Fi ⁇ gure 4 of the steel beam and the concrete slab.
• Figure 6 shows a vertical section view in detail F on Figure 5 of the top flange and the one-sided profiled steel plates tightly attached with screws.
• drawing 1 indicates a welded steel beam
• 13 indicates a con ⁇ crete slab into which the doubble-sided profiles flange 12 is cast.
• the ridges 14 have the effect transfering the shearing forces bet- ween the top flange 12 and the concrete slab 13.
• the drawing also shows a supporting steel plate 15 and the web stiffening steel plates 16.
• 21 indicates a rolled steel beam
• 23 indicates a con ⁇ crete slab into which the flange 22 firmly attached one-side profiled plates 24 are cast.
• the attachment can be done with steel- construction screws 25 or by welding.
• the ridges 26 on the plates 24 have the effect of transfering the shearing forces between the top flange 22 and the concrete slab 23.
• the drawing also shows the supporting steel plate 27 and the web stiffening steel plates 28.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Composite Materials (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Rod-Shaped Construction Members (AREA)
• Joining Of Building Structures In Genera (AREA)
• Bridges Or Land Bridges (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20353539

Family Applications (1)

Country Status (3)

Families Citing this family (5)

Family Cites Families (5)

• 1983
  • 1983-11-30 SE SE8306633A patent/SE8306633L/ not_active Application Discontinuation
• 1984
  • 1984-11-30 WO PCT/SE1984/000410 patent/WO1985002432A1/en not_active Ceased
  • 1984-11-30 EP EP19850900234 patent/EP0163717A1/de not_active Withdrawn

Non-Patent Citations (1)

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