EP1611295B1 - Steel beam - Google Patents

Steel beam Download PDF

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Publication number
EP1611295B1
EP1611295B1 EP04724625A EP04724625A EP1611295B1 EP 1611295 B1 EP1611295 B1 EP 1611295B1 EP 04724625 A EP04724625 A EP 04724625A EP 04724625 A EP04724625 A EP 04724625A EP 1611295 B1 EP1611295 B1 EP 1611295B1
Authority
EP
European Patent Office
Prior art keywords
steel beam
web parts
web
peg
peg members
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
EP04724625A
Other languages
German (de)
French (fr)
Other versions
EP1611295A1 (en
Inventor
Kari Tuominen
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.)
Peikko Group Oy
Original Assignee
Peikko Group Oy
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 Peikko Group Oy filed Critical Peikko Group Oy
Priority to PL04724625T priority Critical patent/PL1611295T3/en
Publication of EP1611295A1 publication Critical patent/EP1611295A1/en
Application granted granted Critical
Publication of EP1611295B1 publication Critical patent/EP1611295B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

Definitions

  • the invention relates to a steel beam arranged to act together with concrete as a supporting composite structure for different slab systems, the composite structure being arranged to be supported at least at supporting points at the area of the ends and comprising two web parts and horizontal cantilever parts extending outside thereof, the web parts being arranged adjacent at a distance from each other and interconnected at one edge of each web part by means of a horizontal upper part, the web parts and the horizontal upper part being arranged to constitute a space that can be filled with concrete.
  • steel beams of the above type so-called steel composite beams
  • steel composite beams have long been known in the construction industry.
  • these steel composite beams act as a steel beam for .installation-time loads.
  • the beam acts as a composite structure together with the concrete.
  • the beam is cast full of concrete in connection with the joint grouting of the slabs and a possible topping.
  • Steel composite beams are either single-span or plural-span beams. This means that the beam is supported either at its ends, i.e. in the area of the supporting points in the area of its ends or, alternatively, it comprises intermediate supports such that the beam also includes supporting points between the supporting points in the area of its ends. This is why it is not practical to make the beam similar over its entire length, but additional steel parts are fastened to the basic cross-section according to stresses.
  • the beam is subjected to a high shearing stress in the vicinity of the support arranged in the supporting point.
  • this high shearing stress has been received by welding a chamfered plate inside the beam in the vicinity of the supporting point.
  • the drawback in the above structure is that the plate increases the weight of the beam and thereby its price.
  • the plate is also difficult to fasten on a production line because the welding position is unfavourable since, in practice, the labourer has to bend and at the same time reach upwards.
  • the shearing force decreases linearly from the end of the beam towards the middle.
  • the plate is of uniform section, its thickness being determined according to the highest value of the shearing force. Thus, part of the capacity of the plate is unnecessary and remains unutilized.
  • the object of the invention is to provide a steel beam allowing the drawbacks of prior art to be eliminated. This is achieved with a steel beam of the invention.
  • the steel beam of the invention is characterized in that at least one peg member whose one end is fastened to the lower surface of the upper part and whose other end is provided with an anchoring expansion or widening section is arranged inside the space defined by the web parts and the horizontal upper part, in the area of the supporting points.
  • An advantage of the invention over prior art is that the peg members are light and their number can be changed very easily over the length of the beam. Accordingly, superfluous capacity and weight are not created in the beam.
  • An additional advantage of the invention is that the peg members are much easier to fasten to the beam than the previously used plate.
  • the peg members can be fastened to the plate constituted by the upper part of the beam from the top, i.e. the welding can be carried out from above for instance by placing the peg member into a hole provided in the plate. This eliminates the inconvenient working position caused by the welding of the previously used plate.
  • Figures 1 and 2 show an embodiment of the steel beam according to the invention.
  • the steel beam comprises two web parts 1 and horizontal cantilever parts 2 extending outside thereof.
  • the web parts 1 are arranged adjacent at a distance from each other and interconnected at one edge of each web part 1 by means of a horizontal upper part 3.
  • the web parts 1 and the horizontal upper part 3 are arranged to constitute a space 4 that can be filled with concrete.
  • the lower edges of the web parts 1 are interconnected by means of a horizontal lower part 5.
  • the web parts 1 are provided with openings 6 enabling the feed of concrete into the space 4.
  • peg members whose ends comprise an expansion or widening section acting as an anchoring are used in the vicinity of a supporting point.
  • at least one peg member 7 is arranged inside the space 4 defined by the web parts 1 and the horizontal upper part 3, in the area of the supporting points.
  • One end of the peg member 7 is fastened to the lower surface of the upper part, as shown particularly clearly in Figure 1 .
  • the other end of the peg member 7 is provided with an expansion or widening section 8 that helps the anchoring.
  • the number of peg members 7 over the length of the beam may change, avoiding unnecessary capacity. Accordingly, there may be either one or more peg members 7 according to the need, and the number may also change e.g. in the longitudinal direction of the beam.
  • the peg members 7 may be placed in either one or more lines.
  • Figure 1 shows a solution wherein the peg members are in two lines. The peg members 7 are placed in the area of the supporting points, i.e. at the ends of the beam and, if need be, also in the area of the supporting points between the ends of the beam.
  • the peg members can be made either from a smooth bar or from a ribbed bar.
  • the shape of the expansion or widening section 8 acting as the anchoring end is optional as long as it constitutes an anchoring member.
  • the shape of the anchoring end can be e.g. round, oval, etc.
  • the expansion or widening section acting as the anchoring end can be implemented by using any suitable technique.
  • an implementation wherein the peg members 7 are made from jolt pegs has been found to be particularly advantageous.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • Composite Materials (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Heat Treatment Of Articles (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)
  • Polymerisation Methods In General (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

A steel beam to act together with concrete as a supporting composite structure for different slab systems. The structure is supported at supporting points at the area of the ends and comprises two web parts (1) and horizontal parts (2) extending outside thereof. The web parts (1) are adjacent at a distance from each other and interconnected at one edge of each web part (1) by means of an upper part (3). The web parts (1) and the upper part (3) constitute a space (4) for concrete. The steel beam comprises at least one peg member (7) whose one end is fastened to the upper part (3) and whose other end is pro-vided with an anchoring expansion or widening section (8). This peg member is arranged inside the space (4) defined by the web parts (1) and the upper part (3), in the area of the supporting points.

Description

  • The invention relates to a steel beam arranged to act together with concrete as a supporting composite structure for different slab systems, the composite structure being arranged to be supported at least at supporting points at the area of the ends and comprising two web parts and horizontal cantilever parts extending outside thereof, the web parts being arranged adjacent at a distance from each other and interconnected at one edge of each web part by means of a horizontal upper part, the web parts and the horizontal upper part being arranged to constitute a space that can be filled with concrete.
  • Steel beams of the above type, so-called steel composite beams, have long been known in the construction industry. During installation, these steel composite beams act as a steel beam for .installation-time loads. After the concreting, which takes place following the installation of the slabs, the beam acts as a composite structure together with the concrete. In said concreting, the beam is cast full of concrete in connection with the joint grouting of the slabs and a possible topping.
  • Several different solutions for steel composite beams have been developed over the years. Examples of previously known solutions include the solutions disclosed in the Finnish patent publications 85745 (see WO 90/12173 ) and 92089 .
  • In particular US-A-5 560 176 , family member of the latter, discloses as steel beam in accordance with the preamble of claim 1.
  • Steel composite beams are either single-span or plural-span beams. This means that the beam is supported either at its ends, i.e. in the area of the supporting points in the area of its ends or, alternatively, it comprises intermediate supports such that the beam also includes supporting points between the supporting points in the area of its ends. This is why it is not practical to make the beam similar over its entire length, but additional steel parts are fastened to the basic cross-section according to stresses.
  • Typically, the beam is subjected to a high shearing stress in the vicinity of the support arranged in the supporting point. In previous solutions, this high shearing stress has been received by welding a chamfered plate inside the beam in the vicinity of the supporting point.
  • The drawback in the above structure is that the plate increases the weight of the beam and thereby its price. The plate is also difficult to fasten on a production line because the welding position is unfavourable since, in practice, the labourer has to bend and at the same time reach upwards. Typically, the shearing force decreases linearly from the end of the beam towards the middle. However, the plate is of uniform section, its thickness being determined according to the highest value of the shearing force. Thus, part of the capacity of the plate is unnecessary and remains unutilized.
  • The object of the invention is to provide a steel beam allowing the drawbacks of prior art to be eliminated. This is achieved with a steel beam of the invention. The steel beam of the invention is characterized in that at least one peg member whose one end is fastened to the lower surface of the upper part and whose other end is provided with an anchoring expansion or widening section is arranged inside the space defined by the web parts and the horizontal upper part, in the area of the supporting points.
  • An advantage of the invention over prior art is that the peg members are light and their number can be changed very easily over the length of the beam. Accordingly, superfluous capacity and weight are not created in the beam. An additional advantage of the invention is that the peg members are much easier to fasten to the beam than the previously used plate. The peg members can be fastened to the plate constituted by the upper part of the beam from the top, i.e. the welding can be carried out from above for instance by placing the peg member into a hole provided in the plate. This eliminates the inconvenient working position caused by the welding of the previously used plate.
  • In the following, the invention will be described in detail by means of an exemplary embodiment described in the accompanying drawing, wherein
    • Figure 1 shows a steel beam according to the invention seen in the longitudinal direction of the beam, and
    • Figure 2 is a perspective view of a beam according to the invention.
  • Figures 1 and 2 show an embodiment of the steel beam according to the invention. The steel beam comprises two web parts 1 and horizontal cantilever parts 2 extending outside thereof. The web parts 1 are arranged adjacent at a distance from each other and interconnected at one edge of each web part 1 by means of a horizontal upper part 3. The web parts 1 and the horizontal upper part 3 are arranged to constitute a space 4 that can be filled with concrete.
  • In the example of the figures, the lower edges of the web parts 1 are interconnected by means of a horizontal lower part 5. The web parts 1 are provided with openings 6 enabling the feed of concrete into the space 4.
  • The above facts are evident to a person skilled in the art, and they are therefore not described in any detail herein. As for the above facts, reference is made to the previously mentioned Finnish patent publication 85745 .
  • In accordance with the essential idea of the steel beam of the invention, peg members whose ends comprise an expansion or widening section acting as an anchoring are used in the vicinity of a supporting point. As the figures show, at least one peg member 7 is arranged inside the space 4 defined by the web parts 1 and the horizontal upper part 3, in the area of the supporting points. One end of the peg member 7 is fastened to the lower surface of the upper part, as shown particularly clearly in Figure 1. The other end of the peg member 7 is provided with an expansion or widening section 8 that helps the anchoring.
  • The number of peg members 7 over the length of the beam may change, avoiding unnecessary capacity. Accordingly, there may be either one or more peg members 7 according to the need, and the number may also change e.g. in the longitudinal direction of the beam. The peg members 7 may be placed in either one or more lines. Figure 1 shows a solution wherein the peg members are in two lines. The peg members 7 are placed in the area of the supporting points, i.e. at the ends of the beam and, if need be, also in the area of the supporting points between the ends of the beam.
  • The peg members can be made either from a smooth bar or from a ribbed bar. The shape of the expansion or widening section 8 acting as the anchoring end is optional as long as it constitutes an anchoring member. The shape of the anchoring end can be e.g. round, oval, etc.
  • The expansion or widening section acting as the anchoring end can be implemented by using any suitable technique. However, an implementation wherein the peg members 7 are made from jolt pegs has been found to be particularly advantageous.
  • The embodiment of the invention described above is in no way intended to restrict the invention, but the invention can be modified freely within the scope of the claims. It is therefore evident that the steel beam of the invention or its details no not necessarily have to be exactly as shown in the figures, but also other solutions are feasible.

Claims (7)

  1. A steel beam arranged to act together with concrete as a supporting composite structure for different slab systems, the composite structure being arranged to be supported at least at supporting points at the area of the ends and comprising two web parts (1) and horizontal cantilever parts (2) extending outside thereof, the web parts (1) being arranged adjacent at a distance from each other and interconnected at one edge of each web part (1) by means of a horizontal upper part (3), the web parts (1) and the horizontal upper part (3) being arranged to constitute a space (4) that can be filled with concrete, characterized in that at least one peg member (7) whose one end is fastened to the lower surface of the upper part (3) and whose other end is provided with an anchoring expansion or widening section (8) is arranged inside the space (4) defined by the web parts (1) and the horizontal upper part (3), in the area of the supporting points.
  2. A steel beam as claimed in claim 1, characterized in that there are several peg members (7).
  3. A steel beam as claimed in claim 2, characterized in that the peg members (7) are arranged in one line.
  4. A steel beam as claimed in claim 2, characterized in that the peg members (7) are arranged in several lines.
  5. A steel beam as claimed in any one of claims 1 to 4, characterized in that the peg members (7) are made from a smooth bar.
  6. A steel beam as claimed in any one of claims 1 to 4, characterized in that the peg members (7) are made from a ribbed bar.
  7. A steel beam as claimed in any one of claims 1 to 6, characterized in that the peg members (7) are jolt pegs.
EP04724625A 2003-04-10 2004-03-31 Steel beam Expired - Lifetime EP1611295B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04724625T PL1611295T3 (en) 2003-04-10 2004-03-31 Steel beam

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20030145U FI5914U1 (en) 2003-04-10 2003-04-10 steel beam
PCT/FI2004/000194 WO2004090253A1 (en) 2003-04-10 2004-03-31 Steel beam

Publications (2)

Publication Number Publication Date
EP1611295A1 EP1611295A1 (en) 2006-01-04
EP1611295B1 true EP1611295B1 (en) 2009-05-13

Family

ID=8565492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04724625A Expired - Lifetime EP1611295B1 (en) 2003-04-10 2004-03-31 Steel beam

Country Status (9)

Country Link
EP (1) EP1611295B1 (en)
AT (1) ATE431469T1 (en)
DE (1) DE602004021103D1 (en)
DK (1) DK1611295T3 (en)
ES (1) ES2323783T3 (en)
FI (1) FI5914U1 (en)
NO (1) NO331585B1 (en)
PL (1) PL1611295T3 (en)
WO (1) WO2004090253A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015104628U1 (en) 2015-09-01 2016-12-05 Pfeifer Holding Gmbh & Co. Kg Support beam for ceiling systems and ceiling system
RU2621247C1 (en) * 2016-04-12 2017-06-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Steel-concrete beam
EP4435193A3 (en) * 2017-03-07 2025-01-15 NXT Building System Pty Ltd. Building system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20145669A7 (en) 2014-07-11 2016-01-12 Peikko Group Oy Steel beam

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE821235R (en) * 1973-10-26 1975-02-17 STEEL BOXES AND THEIR USE FOR THE EXECUTION OF MIXED STEEL-CONCRETE POSTS OR PILES.
DE8203302U1 (en) * 1982-02-08 1982-06-24 Brendel, Irnfried, Dipl.-Ing., 7847 Badenweiler INSERT FOR STEEL COMPOSITE BEAM
SE457364B (en) * 1987-05-11 1988-12-19 Joergen Thor FIRE-RESISTABLE BEAM LAYER Beam OF STEEL IN CONNECTION WITH CONCRETE
FI85745C (en) * 1989-04-13 1993-02-23 Peikkorakenne Oy Fireproof prefabricated steel beam
FI92089C (en) * 1993-01-13 1994-09-26 Deltatek Oy Prefabricated steel-concrete composite beam
FI118817B (en) * 2002-05-29 2008-03-31 Teraespeikko Oy Steel beam
FI20021934L (en) * 2002-10-31 2004-07-16 Tartuntamarkkinointi Oy Joint beam

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015104628U1 (en) 2015-09-01 2016-12-05 Pfeifer Holding Gmbh & Co. Kg Support beam for ceiling systems and ceiling system
EP3885506A1 (en) 2015-09-01 2021-09-29 Pfeifer Holding GmbH & Co. KG Beam for ceiling systems, ceiling system and method for its production
RU2621247C1 (en) * 2016-04-12 2017-06-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Steel-concrete beam
EP4435193A3 (en) * 2017-03-07 2025-01-15 NXT Building System Pty Ltd. Building system

Also Published As

Publication number Publication date
DE602004021103D1 (en) 2009-06-25
PL1611295T3 (en) 2009-07-31
ES2323783T3 (en) 2009-07-24
EP1611295A1 (en) 2006-01-04
WO2004090253A1 (en) 2004-10-21
NO20053243L (en) 2005-07-01
ATE431469T1 (en) 2009-05-15
NO20053243D0 (en) 2005-07-01
NO331585B1 (en) 2012-01-30
DK1611295T3 (en) 2009-06-22
FIU20030145U0 (en) 2003-04-10
FI5914U1 (en) 2003-08-25

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