EP0484345A1 - Improvements in and relating to composite beams. - Google Patents

Improvements in and relating to composite beams.

Info

Publication number
EP0484345A1
EP0484345A1 EP90909826A EP90909826A EP0484345A1 EP 0484345 A1 EP0484345 A1 EP 0484345A1 EP 90909826 A EP90909826 A EP 90909826A EP 90909826 A EP90909826 A EP 90909826A EP 0484345 A1 EP0484345 A1 EP 0484345A1
Authority
EP
European Patent Office
Prior art keywords
profiles
concrete
steel
improvement
longitudinal
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.)
Granted
Application number
EP90909826A
Other languages
German (de)
French (fr)
Other versions
EP0484345B1 (en
Inventor
Joergen Thor
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0484345A1 publication Critical patent/EP0484345A1/en
Application granted granted Critical
Publication of EP0484345B1 publication Critical patent/EP0484345B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders

Definitions

  • the present invention relates to an improvement in a floor beam of steel in composite action with concrete, said beam comprises at least one projecting, horizontal bearing plate for supporting floor structures and said improvement is intended to be fastened to an upper part of the beam in its longitudinal extension.
  • the load carrying ca- pacity of the steel cross-section itself often is so limited that not even the dead load of the floor can be supported, why the beam must be propped until the concrete has obtained the strength required.
  • the propping involves an evident drawback, since it often is a bar for a rational constructing.
  • An object of the present invention is to provide an im ⁇ provement in composite beams by which the steel area of the upper part of a beam in a simple way can be increased and hereby increase the compression zone of the steel cross- section before the hardening of the concrete.
  • the improvement also admits that the manu ⁇ facturing of the same can be rationalized in that it can be prefabricated in a number of variants and sizes and be kept in stock for use to different beam sizes depending on loads and spans.
  • the improvement also has such a design that it very easy and quickly can be fixed to the upper part of a floor structure supporting beam e.g by longutudinal, in ⁇ termittent welding, which also can be performed by an automatic machine.
  • the beam 1 is made of steel and has a form not closer illustrated in the drawing, which admits a composite action with concrete and comprises at least one projecting, horizontal bearing plate 3 for supporting floor structures 4.
  • the prefabricated ladder 2 comprises at least two longitudinal profiles 5 running parallel to and in a predetermined distance from each other, said profiles are positionally fixable to the upper part 6 of the beam 1.
  • the profiles 5 consist of rectangular steel pro ⁇ files.
  • a number of transverse connecting elements 7 pro ⁇ vided in a predetermined distance from each other extend between the profiles 5.
  • the connecting elements 7 consist of angle bended steel profiles, which are fixed by welding to the longi ⁇ tudinal profiles 5 having their apex formation 8 directed across the longitudinal extension of the profiles 5.
  • the connecting elements 7 can be designed with any suitable form, but angle bended steel profiles are to be preferred.
  • the connecting elements 7 are mounted in parallel to each other having a mutual distance of about 200-600 mm along the whole extension of the ladder 2.

Abstract

L'invention concerne une amélioration relative à une poutre en acier ayant une action combinée avec du béton. Ladite poutre (1) comprend au moins une plaque porteuse saillante horizontale (3) destinée à supporter des structures de plancher (4), ladite amélioration étant fixée à une partie supérieure (6) de la poutre dans son extension longitudinale. Ladite amélioration consiste en une échelle préfabriquée (2) comprenant au moins deux profilés longitudinaux (5) parallèles et situés à une distance prédéterminée l'un de l'autre. On peut fixer lesdits profilés en position sur la partie supérieure (6) de ladite poutre (1), un certain nombre d'éléments de raccordement transversaux (7) s'étendant entre ledit profilé, à une distance prédéterminée les uns des autres, afin de permettre la transmission nécessaire des forces de cisaillement pour obtenir une action combinée statique entre ladite poutre (1) et le béton, à laquelle on parvient ultérieurement. Ladite échelle (2), du fait qu'elle augmente la zone de compression de la section transversale de l'acier, est destinée à améliorer la charge admissible de ladite poutre (1) avant le coulage, et élimine ainsi la nécessité d'étançonnement avant le durcissement du béton.The invention relates to an improvement relating to a steel beam having a combined action with concrete. Said beam (1) comprises at least one horizontal protruding load-bearing plate (3) intended to support floor structures (4), said improvement being fixed to an upper part (6) of the beam in its longitudinal extension. Said improvement consists of a prefabricated ladder (2) comprising at least two longitudinal sections (5) parallel and located at a predetermined distance from each other. Said profiles can be fixed in position on the upper part (6) of said beam (1), a number of transverse connecting elements (7) extending between said profile, at a predetermined distance from each other, in order to to allow the necessary transmission of the shearing forces to obtain a combined static action between said beam (1) and the concrete, which is achieved later. Said ladder (2), by increasing the cross-sectional compression area of the steel, is intended to improve the allowable load of said beam (1) before casting, and thus eliminates the need for shoring before the concrete hardens.

Description

Improvements in and relating to composite beams
The present invention relates to an improvement in a floor beam of steel in composite action with concrete, said beam comprises at least one projecting, horizontal bearing plate for supporting floor structures and said improvement is intended to be fastened to an upper part of the beam in its longitudinal extension.
For steel beams in composite action with concrete it is necessary that the transmission of shear force between the steel cross-section and concrete is guaranteed. This is often done by aid of so called studs (bolts), which are welded to the steel beam, preferably to its upper flange. Depending on actual forces which shall be transmitted, a lot of studs can be required. In the composite cross- section concrete only takes up compression forces, some- times together with a smaller part of the steel cross- section, while the tensile forces are only taken up by the steel. Before the concrete has hardened the load carrying capacity is therefore limited depending on that the con¬ crete compression zone is lacking. The load carrying ca- pacity of the steel cross-section itself often is so limited that not even the dead load of the floor can be supported, why the beam must be propped until the concrete has obtained the strength required. The propping involves an evident drawback, since it often is a bar for a rational constructing.
An object of the present invention is to provide an im¬ provement in composite beams by which the steel area of the upper part of a beam in a simple way can be increased and hereby increase the compression zone of the steel cross- section before the hardening of the concrete. By this the need of propping is eliminated in the same time as the improvement in an effective way guarantee the transmission of shear force between steel and concrete in the composite cross-section. The improvement also admits that the manu¬ facturing of the same can be rationalized in that it can be prefabricated in a number of variants and sizes and be kept in stock for use to different beam sizes depending on loads and spans. The improvement also has such a design that it very easy and quickly can be fixed to the upper part of a floor structure supporting beam e.g by longutudinal, in¬ termittent welding, which also can be performed by an automatic machine. The characteristic features of the invention are set forth in the following claims.
The invention will now be described in more detail below with reference to the accompanying drawing, which illu¬ strates a preferable embodiment of the improvement according to the invention in a schematic perspective view, when it is mounted to the upper part of a steel beam schematically indicated.
As will be seen from the drawing it illustrates a sche¬ matically indicated, as a composite beam formed steel beam 1 in a perspective view having a preferable embodiment of • the present invention in the form of a prefabricated ladder 2, which is fastened to an upper part 6 of the beam 1 in its longitudinal extension. The beam 1 is made of steel and has a form not closer illustrated in the drawing, which admits a composite action with concrete and comprises at least one projecting, horizontal bearing plate 3 for supporting floor structures 4. The prefabricated ladder 2 comprises at least two longitudinal profiles 5 running parallel to and in a predetermined distance from each other, said profiles are positionally fixable to the upper part 6 of the beam 1. In the preferred embodiment illu¬ strated, the profiles 5 consist of rectangular steel pro¬ files. A number of transverse connecting elements 7 pro¬ vided in a predetermined distance from each other extend between the profiles 5. These bring about necessary transmission of shear force for static composite action between the beam 1 and concrete which is performed later.
In the embodiment preferred according to the present in¬ vention, the connecting elements 7 consist of angle bended steel profiles, which are fixed by welding to the longi¬ tudinal profiles 5 having their apex formation 8 directed across the longitudinal extension of the profiles 5. The connecting elements 7 can be designed with any suitable form, but angle bended steel profiles are to be preferred. The connecting elements 7 are mounted in parallel to each other having a mutual distance of about 200-600 mm along the whole extension of the ladder 2.

Claims

Claims
1. An improvement in a steel beam in composite action with concrete, said beam (1) comprises at least a pro¬ jecting, horizontal bearing plate (3) for supporting floor structures (4) and said improvement is intended to be fastened to an upper part of the beam in its longitudinal extension, characterized in that a prefabricated ladder (2) comprising at least two longitudinal profiles (5) running parallel to and in a predetermined distance from each other, said profiles are positionally fixable to the upper part (6) of the beam (1) and between said profiles a number of transverse connecting elements (7) extend in a pre¬ determined distance from each other for necessary trans¬ mission of shear force in reaching static composite action between the beam (1) and concrete which is performed later and said ladder (2) in increasing of the compression zone of the steel cross-section is intended to improve the load carrying capacity of the beam (1) before casting and in this way eliminate the need of propping before the concrete has hardened.
2. An improvement according to claim 1, characterized in that the connecting elements (7) consist of angle bended steel profiles, which are fixed to the longitudinal pro¬ files (5) having their apex formation (8) directed across the longitudinal extension of the profiles (5).
3. An improvement according to claim 1, characterized in that the longitudinal profiles (5) consist of rectangular steel profiles.
4. An improvement according to claim 1 or 2, characterized in that the connecting element (7) are pro- vided in parallel to each other having a mutual distance of about 200-600 mm.
EP90909826A 1989-06-15 1990-06-15 Improvements in and relating to composite beams Expired - Lifetime EP0484345B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE8902163A SE466609B (en) 1989-06-15 1989-06-15 DEVICE AT A COLLABORATION BALL
SE8902163 1989-06-15
PCT/SE1990/000427 WO1990015907A1 (en) 1989-06-15 1990-06-15 Improvements in and relating to composite beams

Publications (2)

Publication Number Publication Date
EP0484345A1 true EP0484345A1 (en) 1992-05-13
EP0484345B1 EP0484345B1 (en) 1994-12-21

Family

ID=20376291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90909826A Expired - Lifetime EP0484345B1 (en) 1989-06-15 1990-06-15 Improvements in and relating to composite beams

Country Status (5)

Country Link
EP (1) EP0484345B1 (en)
AU (1) AU5846090A (en)
DE (1) DE69015360T2 (en)
SE (1) SE466609B (en)
WO (1) WO1990015907A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731824A (en) * 1956-01-24 hadley
DE3366105D1 (en) * 1982-09-20 1986-10-16 South African Inventions Composite floor structures
SE448897B (en) * 1983-06-21 1987-03-23 Rolf Nystrom Joist-supporting steel beam
US4646496A (en) * 1985-03-21 1987-03-03 Wilnau John A Structural wall and concrete form system
SE457364B (en) * 1987-05-11 1988-12-19 Joergen Thor FIRE-RESISTABLE BEAM LAYER Beam OF STEEL IN CONNECTION WITH CONCRETE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9015907A1 *

Also Published As

Publication number Publication date
SE8902163D0 (en) 1989-06-15
EP0484345B1 (en) 1994-12-21
DE69015360T2 (en) 1995-08-10
SE8902163L (en) 1990-12-16
AU5846090A (en) 1991-01-08
DE69015360D1 (en) 1995-02-02
WO1990015907A1 (en) 1990-12-27
SE466609B (en) 1992-03-09

Similar Documents

Publication Publication Date Title
US3392499A (en) Steel joist connection
EP2966236A1 (en) Joining device for precast reinforced concrete columns with a dry joint
US20100170194A1 (en) Girders for reinforcing concrete and method for connecting them to pillars in order to provide continuity from bay to bay
US3885369A (en) Structural element
KR101548114B1 (en) Steel concrete composite beam having increased composite effect of connecting part at the cross-section change part
DE2854074A1 (en) BRIDGE CONSTRUCTION CONSTRUCTED FROM INDIVIDUAL MODULES WITH SUPPORTING DRIVEWAY AND LOW TOTAL WEIGHT
DE112004000197T5 (en) Decking Kontruktionssystem
EP0484345A1 (en) Improvements in and relating to composite beams.
KR101329372B1 (en) Deflection control structure of deck plate of slim floor with demountable tendon and construction method thereof
HU225322B1 (en) Flat soffit, doubly prestressed, composite, roof-ceiling construction for large span industrial buildings
US1938491A (en) Structural units for steel frame buildings and the like
WO1991000400A1 (en) Prefabricated floor slab
KR102585526B1 (en) Composite frame with end-buried girder joint
EP3026199B1 (en) Cavity wall anchor
KR102638379B1 (en) Structure and Method for Constructing Wall using Truss Girder
JPH05133032A (en) Beam structure of floor
KR100485474B1 (en) Deck panel and method thereof
SU1716021A1 (en) Butt joint of collar-beams and columns
JP2540314B2 (en) Steel rebar concrete columns and beams
JPH09317084A (en) Composite structure of fiber-reinforced plastic and concrete
US20210293022A1 (en) Supporting beam for slab systems, slab system, and method for the production thereof
CH712684A2 (en) Space cell element.
JPS63233133A (en) Steel plate/concrete panel structure
KR20240036329A (en) Composite Beam
SU1675510A1 (en) Butt joint of span-pieces with column

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

17P Request for examination filed

Effective date: 19920113

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE DK FR GB NL

17Q First examination report despatched

Effective date: 19921008

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE DK FR GB NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Effective date: 19941221

REF Corresponds to:

Ref document number: 69015360

Country of ref document: DE

Date of ref document: 19950202

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970612

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19970620

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19970630

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970822

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980615

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980615

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990226

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19990101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST