EP2145058A1 - Composite beam structure - Google Patents
Composite beam structureInfo
- Publication number
- EP2145058A1 EP2145058A1 EP08761649A EP08761649A EP2145058A1 EP 2145058 A1 EP2145058 A1 EP 2145058A1 EP 08761649 A EP08761649 A EP 08761649A EP 08761649 A EP08761649 A EP 08761649A EP 2145058 A1 EP2145058 A1 EP 2145058A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dowel
- pieces
- composite
- beam structure
- structure according
- 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- Withdrawn
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 57
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 33
- 239000004567 concrete Substances 0.000 claims abstract description 33
- 239000010959 steel Substances 0.000 claims abstract description 33
- 238000005266 casting Methods 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 claims description 6
- 241000826860 Trapezium Species 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 claims description 2
- 238000010008 shearing Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 239000004035 construction material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
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
- E04B5/29—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
- E04C3/29—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
-
- 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
Definitions
- This invention relates to a composite structure, and in more detail a composite beam structure, used in the construction industry.
- a composite structure can be understood as almost any structure composed of two or more materials, such as e.g. a conventional reinforced concrete structure. Between different structural elements, composite operation is always created when the elements are continuous i.e. monolithic or connected with a shearing connection.
- a composite structure is generally understood as a combination of steel structures or sheet structures and concrete or reinforced concrete.
- the operating principle of the steel-concrete composite structure is based on the almost perfect or partial co-operation between the steel part and the concrete part.
- the steel part can be of structural steel or sheet structural steel and the concrete part of common concrete, high- strength concrete or light concrete.
- the basic type of a steel-concrete composite structure commonly used as an intermediate floor structure can be considered to be a single- span freely-supported composite beam on which a hollow-core slab / a closed composite slab or the like rests.
- dowels dowel pins, welded on the upper flange of a steel profile, which are dimensioned as elastic connectors.
- the ratio of steel and concrete should be optimal in the composite structures. Steel is liable for tensile stresses and concrete is liable for bearing stresses, then the best characteristics of each can be utilised.
- a composite beam constituted by concrete and steel (usually the concrete part is pressed and the steel part drawn in the composite beam structure), the co-operation between the parts is provided mechanically.
- the composite beams are installed on supports, after which hollow-core slabs or other slabs or the like are installed resting on them. After the installation of the slabs, the seams and the beam are filled with concrete.
- a composite beam structure which structure includes several dowel pieces for forming a connection between steel and concrete, and the dowel pieces are bar- like pieces circular of their cross-section which are fastened on the upper surface of the beam.
- the dowel pieces On the upper end of the dowel pieces, there is a widened part, circular seen from the top, and the arrangement according to the specification further utilises a support mesh in forming and improving the connection between concrete and steel.
- Specification AT 301821 describes a composite structure in which folds have been made for support in a V-shaped piece fillable with concrete, manufactured by bending from a plate.
- connection i.e. the co-operation between steel and concrete in the connection, in the best possible way such that the connection would operate almost perfectly (or perfectly which is the aim of the connection).
- the object of this invention is to provide a novel type of a composite structure, or in more detail a composite beam structure, by means of which disadvantages of known arrangements can be minimised or eliminated, and thus by means of which is provided a functioning and extremely good composite beam arrangement of its costs and other characteristics i.e. technical qualities.
- An advantage of the arrangement according to the invention compared to the known arrangements is that it provides a better connection between steel and concrete than known arrangements, which connection fulfils the demands of rigidity and endures loads and stresses directed at it better than known arrangements i.e. the connection is able to receive vertical and horizontal forces in the structure (occurring at its different points).
- the dowel pieces which are the shape of a rectangular prism, such as e.g. quadratic, lack a projection surface receiving/conveying vertical forces.
- An advantage of the arrangement according to the invention is also that awkward bendings or other laborious processing measures can be avoided in it.
- a further advantage of the arrangement according to the invention is that, with the composite beam structure according to the invention, the consumption of steel required in the composite beam structure can be decreased and then a considerable economic benefit is provided.
- Fig. Ia shows a cross-section of a simplified composite beam arrangement according to the invention seen from the end of the beam.
- Fig. Ib shows an arrangement according to the invention seen from the side of the beam.
- Fig. Ic shows a top view of dowel pieces, fastened inclined in the beam.
- Figs. 2a-2f show a front view of the different shapes of the dowel piece.
- a slab-like piece 2 such as e.g. a hollow-core slab.
- the height of the slab- like piece is, according to the figure, almost equal to the height of the beam 3 but the slab can also be considerably lower than the height of the beam.
- a casting 1 is formed which is advantageously concrete casting, and one or more dowel pieces 4 remaining inside the casting, which dowel pieces are fastened on the upper surface of the beam by welding at a desired point.
- the height of the casting can vary considerably depending on different targets of application, but typically the height of the casting is between 40 mm-200 mm.
- the length of the dowel pieces is at least threefold in relation to the width of the upper surface of the dowel pieces. In an advantageous case, the length of the dowel pieces is at least about fivefold in relation to the width of the upper surface of the dowel pieces.
- the width of the upper surface of the dowel pieces is typically between 20 mm-70 mm, but it can also be wider or narrower, depending on the load of the beam or on the amount of composite effect required.
- the length of the dowel pieces can vary, but it is typically at least 30% of the width of the upper surface of the beam.
- the dowel pieces can also extend over the width of the upper surface of the beam.
- the dowel pieces are fastened in the beam in a perpendicular angle or inclined seen from the top as shown in Fig. Ic.
- Fig. 1 is shown only to illustrate a composite beam structure according to the invention, it does not implicate steel profiles, composite plates or auxiliary reinforcements etc. remaining partially or totally inside the casting.
- the arrangement according to the invention can utilise all already known beams and beam types, such as an I beam, a T beam, a WQ beam, a box beam etc.
- the dowel pieces can be the shape of a parallelogram or a trapezium, triangular, or the dowel pieces can include one or more bevels, such as e.g. shown in Fig. 2f.
- the dowel pieces can be substantially of the shape of T or I or L
- the dowel pieces can also include one or more roundings. It is also essential that the dowel pieces thus have at least one inclined surface or one curved surface or two straight surfaces or combinations of the above surfaces.
- the dowel pieces can be hollow or perforated and support bars, such as e.g. round steel bars or the like, can have been arranged inside the dowel pieces, the task of which bars is to improve the composite effect by increasing the gripping surface.
- support bars such as e.g. round steel bars or the like
- Round steel bars can also be utilised in anchoring the slab/slabbings on the beam and a mesh can be set at the base of the dowels to improve the composite effect.
- the mesh can be manufactured e.g. of steel.
- used arrangements may be varied quite widely. It is also possible to consider e.g. such an arrangement in which already known dowel pieces and/or sections (section arrangements) increasing the grip of steel and concrete are combined with the dowel pieces described here to be used together in order to provide a composite effect as good as possible in the connection between steel and concrete.
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)
- Joining Of Building Structures In Genera (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20070384A FI20070384A (en) | 2007-05-16 | 2007-05-16 | The composite beam structure |
PCT/FI2008/050253 WO2008139029A1 (en) | 2007-05-16 | 2008-05-08 | Composite beam structure |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2145058A1 true EP2145058A1 (en) | 2010-01-20 |
EP2145058A4 EP2145058A4 (en) | 2012-11-28 |
Family
ID=38069427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08761649A Withdrawn EP2145058A4 (en) | 2007-05-16 | 2008-05-08 | Composite beam structure |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2145058A4 (en) |
FI (1) | FI20070384A (en) |
RU (1) | RU2423585C1 (en) |
WO (1) | WO2008139029A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITVI20130154A1 (en) * | 2013-06-17 | 2014-12-18 | Tecnaria S P A | CONNECTOR FOR REINFORCEMENT OF FLOORS IN BUILDING |
FR3032733B1 (en) * | 2015-02-16 | 2024-04-26 | Mohamed Laraki | CONSTRUCTION ELEMENT AND METHOD FOR ASSEMBLY OF SUCH A CONSTRUCTION ELEMENT |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE605704C (en) * | 1932-07-30 | 1934-11-16 | Otto Schaub | Composite component with a concrete pressure plate and shaped iron beams supporting this |
DE821503C (en) * | 1950-05-14 | 1951-11-19 | Fried Krupp Stahlbau Rheinhaus | Anchorage between steel girders and prestressed concrete slabs of composite structures |
DE1114298B (en) * | 1959-03-05 | 1961-09-28 | Friedr Remy Nachf G M B H | Slab ceiling with retaining clip for anchoring and securing the slabs |
DE2218573A1 (en) * | 1972-04-17 | 1973-10-31 | Gerhard Dipl Ing Tuch | COMPOSITE BEAM WITH TOOTH-PUNCHED UPPER CHART PROFILE |
GB1341824A (en) * | 1969-10-31 | 1973-12-25 | Williams G M J Fuller M E | Composite structural members |
AT335703B (en) * | 1975-07-25 | 1977-03-25 | Koss Kurt | PUSH ANCHOR FOR COMPOSITE BEAM |
DE29505968U1 (en) * | 1995-03-25 | 1995-08-10 | Brendel, Irmfried, Dipl.-Ing., 79410 Badenweiler | Steel composite beams |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2340176A (en) | 1942-03-23 | 1944-01-25 | Porete Mfg Company | Shear reinforced composite structure |
US2479475A (en) * | 1944-03-16 | 1949-08-16 | Porete Mfg Company | Composite structure with triangular shear connectors |
US2479476A (en) * | 1944-04-25 | 1949-08-16 | Porete Mfg Company | Composite structure embodying shear connectors |
DE1005710B (en) * | 1953-09-05 | 1957-04-04 | Richard Doorentz | Reinforced concrete ceiling on freely stored metal beams |
US3138899A (en) * | 1959-10-15 | 1964-06-30 | Homer M Hadley | Structurally integrated composite members |
AT301821B (en) | 1969-07-17 | 1972-08-15 | Oesterr Alpine Montan | COMPOSITE BEAM |
DE3581080D1 (en) * | 1985-09-17 | 1991-02-07 | Wolfhart Andrae | COMPOSITES FOR REINFORCED CONCRETE STRUCTURES. |
US6871462B2 (en) * | 2001-07-09 | 2005-03-29 | Board Of Regents Of University Of Nebraska | Composite action system and method |
AU2002951787A0 (en) | 2002-10-02 | 2002-10-17 | University Of Western Sydney | A composite beam |
US6807789B1 (en) | 2003-05-23 | 2004-10-26 | Daewoo Engineering & Construction Co., Ltd | Steel-concrete composite beam using asymmetric section steel beam |
-
2007
- 2007-05-16 FI FI20070384A patent/FI20070384A/en not_active Application Discontinuation
-
2008
- 2008-05-08 RU RU2009146561/03A patent/RU2423585C1/en not_active IP Right Cessation
- 2008-05-08 WO PCT/FI2008/050253 patent/WO2008139029A1/en active Application Filing
- 2008-05-08 EP EP08761649A patent/EP2145058A4/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE605704C (en) * | 1932-07-30 | 1934-11-16 | Otto Schaub | Composite component with a concrete pressure plate and shaped iron beams supporting this |
DE821503C (en) * | 1950-05-14 | 1951-11-19 | Fried Krupp Stahlbau Rheinhaus | Anchorage between steel girders and prestressed concrete slabs of composite structures |
DE1114298B (en) * | 1959-03-05 | 1961-09-28 | Friedr Remy Nachf G M B H | Slab ceiling with retaining clip for anchoring and securing the slabs |
GB1341824A (en) * | 1969-10-31 | 1973-12-25 | Williams G M J Fuller M E | Composite structural members |
DE2218573A1 (en) * | 1972-04-17 | 1973-10-31 | Gerhard Dipl Ing Tuch | COMPOSITE BEAM WITH TOOTH-PUNCHED UPPER CHART PROFILE |
AT335703B (en) * | 1975-07-25 | 1977-03-25 | Koss Kurt | PUSH ANCHOR FOR COMPOSITE BEAM |
DE29505968U1 (en) * | 1995-03-25 | 1995-08-10 | Brendel, Irmfried, Dipl.-Ing., 79410 Badenweiler | Steel composite beams |
Non-Patent Citations (1)
Title |
---|
See also references of WO2008139029A1 * |
Also Published As
Publication number | Publication date |
---|---|
FI20070384A0 (en) | 2007-05-16 |
EP2145058A4 (en) | 2012-11-28 |
RU2423585C1 (en) | 2011-07-10 |
FI20070384A (en) | 2008-11-17 |
WO2008139029A1 (en) | 2008-11-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20091029 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20121031 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: E04B 5/29 20060101ALI20121025BHEP Ipc: E04C 3/293 20060101AFI20121025BHEP |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
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17Q | First examination report despatched |
Effective date: 20170317 |
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GRAP | Despatch of communication of intention to grant a patent |
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STAA | Information on the status of an ep patent application or granted ep patent |
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INTG | Intention to grant announced |
Effective date: 20170816 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20180103 |