EP0385998B1 - Floor structure for buildings - Google Patents
Floor structure for buildings Download PDFInfo
- Publication number
- EP0385998B1 EP0385998B1 EP19880906197 EP88906197A EP0385998B1 EP 0385998 B1 EP0385998 B1 EP 0385998B1 EP 19880906197 EP19880906197 EP 19880906197 EP 88906197 A EP88906197 A EP 88906197A EP 0385998 B1 EP0385998 B1 EP 0385998B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- beams
- primary
- concrete
- floor structure
- primary beams
- 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
Links
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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
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
- E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
- E04B5/40—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element with metal form-slabs
-
- 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
Definitions
- This invention relates to a floor structure for buildings comprising primary beams, secondary beams supported by the primary beams and a concrete slab cast in place in a trapezoidal metal form supported by the primary and secondary beams, the secondary beams being placed between the upper and lower flanges of the primary beams having, the upper flanges of the secondary beams being on a significantly lower level than the upper flanges of the primary beams so that the form, having a profile parallel to that of the primary beams creates concrete beams which are parallel to the primary beams with the major parts of said concrete beams located significantly below the level of the upper flanges of the primary beams, while otherwise the concrete slab is located significantly above the primary beams.
- the floor structure comprises a set of materials, where the best qualities of the various materials are combined so that the floor structure, besides being technically acceptable and allowing large spans to be covered, are also economically advantageous and can shorten the time required for construction. Furthermore, a floor structure designed according to the invention is easy to dismantle and has high recovery value, qualities which are becoming increasingly essential.
- Figure 1 shows a side view of a portion of the floor structure.
- Figure 2 is a cross section along Line 2-2 in Figure 1.
- Figure 3 is a cross section as in Figure 2 of an alternative embodiment of the invention.
- Figure 1 shows a portion of a parking garage and a portion of the floor structure used in its construction.
- Primary beams 11, 12 and 13 are placed on uprights 14, 15.
- Secondary beams 16-20 in the form of rolled I-beams are placed between the primary beams and are oriented perpendicular to the latter.
- Drain conduits 22 are placed between the rows of uprights 14 and 15.
- the primary beams are welded I-beams as shown in Figure 2 with arched upper flanges 23 and straight lower flanges 24 as shown in Figure 1.
- Figure 2 shows two coaxial secondary beams, on one hand, beam 17, which is shown in Figure 1 and, on the other hand, beam 25. They have end flanges designated 26 and 27, which rest on supports 28, 29 welded onto the web 30 of the primary beam 12. Secondary beams 17, 25 are held together by bolts 31. Shims 32, 33 are placed between the webs of the primary beams 12 and the flanges 26, 27 of the secondary beams.
- trapezoidal corrugated plates 35, 36 and 37 Placed on top of the secondary beams are trapezoidal corrugated plates 35, 36 and 37 in lengths which are as long as the primary beams.
- An overlapping joint between the two plates 35, 36 is shown at 38 in Figure 2.
- the plates are attached to each other by bolts, as indicated by 43, in several places, an the plate deck created is used as a lost form for a concrete slab 44 which is cast in place.
- the trapezoidal-profile plate forms beams which, since the upper flanges 42 of the secondary> beams 16-20 are on a substantially lower level than the upper flanges 23 of the primary beams, will be located essentially beneath the upper flanges 23 of the primary beams.
- These concrete beams have all been designated 47.
- the concrete slab 44 is reinforced against cracking with a reinforcing mesh 46.
- the sheet metal form around the beams 47 of the concrete slab 44 is load bearing, but the beams may also be strengthened by longitudinal reinforcing rods 48.
- the reinforcement in the concrete slab 44 and its beams 47 is extremely simple. It can therefore be installed rapidly, which reduces the time required for construction.
- the upper flanges of the primary beams 12 are arched in the central portion located between the secondary beams, as shown in Figure 1.
- the arch is essentially the shape that the plates 35, 36, 37 would assume under their own weight if they were placed so that they were supported only on a center support. Outside the secondary beams 17 and 19, the upper flanges 23 are straight but inclined.
- the connection between the arched portion and both straight portions is preferably asymptotic.
- the attachment of the secondary beams 16-20 joins the arched shape of the upper flanges of the primary- beams. This arch facilitates the installation of the plate, and contributes a slope suitable for the deck of a parking garage.
- the drain conduits 22 run connected to drain pipes, along with the support pillar 15 for the primary beams.
- the drain conduits drain not only the surface of the concrete, but also the formwork plate if moisture develops between the formwork plate and the concrete. The plate therefore constitutes an extra sealing layer.
- Figure 3 shows an alternative embodiment, in which the trapezoidal corrugated plate has an upper flange 50, which is wide enough to completely cover the upper flange 23 of the primary beam.
- the upper flange 50 has transverse reinforcing embossments to increase its rigidity, and the seams 51, 52 are vertical in the middle of the lower flanges, and extend at least to the level of the upper flanges 50 or somewhat higher, as shown in the figure.
- Each plate therefore comprises one-half narrow lower flanges 53, 54 on either side of a oxide upper flange 50.
- the vertical seams form reinforcements for the concrete.
- a lower flange 52 and : lower flange 53 on a plate next to it therefore together form one complete bottom flange.
- a reinforcement against cracking in the form of a mesh can also be used, as shown in Figure 2.
- the sheet metal in the vertical seams can also be provided with small bosses or indentations to increase its adhesion to the concrete. This design of the plates shown in Fig 3 can shorten the time required for construction even further.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Bridges Or Land Bridges (AREA)
- Rod-Shaped Construction Members (AREA)
- Floor Finish (AREA)
Abstract
Description
- This invention relates to a floor structure for buildings comprising primary beams, secondary beams supported by the primary beams and a concrete slab cast in place in a trapezoidal metal form supported by the primary and secondary beams, the secondary beams being placed between the upper and lower flanges of the primary beams having, the upper flanges of the secondary beams being on a significantly lower level than the upper flanges of the primary beams so that the form, having a profile parallel to that of the primary beams creates concrete beams which are parallel to the primary beams with the major parts of said concrete beams located significantly below the level of the upper flanges of the primary beams, while otherwise the concrete slab is located significantly above the primary beams.
- From US-A-3 251 167 together with DE-B-1 056 347 is previously known a floor structure according to the preamble of the claim of this invention. The difference between this prior art and the present floor structure is, however, that the two publications mentioned above relate to cooperation constructions comprising cooperation elements, i.e. elements which connect the primary beams and the secondary beams with the form, whereby the forces of the concrete beams in the form are transferred to said beams via the cooperation elements. In contrast thereto, the present floor structure does not comprise such cooperation elements and constitutes consequently a non-cooperation constructions in which the form is freely movable on the primary and secondary beams.
- According to the invention, the floor structure comprises a set of materials, where the best qualities of the various materials are combined so that the floor structure, besides being technically acceptable and allowing large spans to be covered, are also economically advantageous and can shorten the time required for construction. Furthermore, a floor structure designed according to the invention is easy to dismantle and has high recovery value, qualities which are becoming increasingly essential.
- The invention is described in greater detail below, with reference to the accompanying drawings which illustrate by way of example the floor structure as used in a parking garage. Figure 1 shows a side view of a portion of the floor structure. Figure 2 is a cross section along Line 2-2 in Figure 1. Figure 3 is a cross section as in Figure 2 of an alternative embodiment of the invention.
- Figure 1 shows a portion of a parking garage and a portion of the floor structure used in its construction.
Primary beams uprights -
Drain conduits 22 are placed between the rows ofuprights - The primary beams are welded I-beams as shown in Figure 2 with arched
upper flanges 23 and straightlower flanges 24 as shown in Figure 1. - Figure 2 shows two coaxial secondary beams, on one hand,
beam 17, which is shown in Figure 1 and, on the other hand,beam 25. They have end flanges designated 26 and 27, which rest onsupports web 30 of theprimary beam 12.Secondary beams Shims primary beams 12 and theflanges - Placed on top of the secondary beams are trapezoidal
corrugated plates plates upper flange 23 of each primary beam, as shown in Figure 2, is aflat plate 41, which has overlappingjoints corrugated plates primary beam 12. The plates are attached to each other by bolts, as indicated by 43, in several places, an the plate deck created is used as a lost form for aconcrete slab 44 which is cast in place. On the lower edge of theconcrete slab 44, the trapezoidal-profile plate forms beams which, since theupper flanges 42 of the secondary> beams 16-20 are on a substantially lower level than theupper flanges 23 of the primary beams, will be located essentially beneath theupper flanges 23 of the primary beams. These concrete beams have all been designated 47. Theconcrete slab 44 is reinforced against cracking with a reinforcingmesh 46. The sheet metal form around thebeams 47 of theconcrete slab 44 is load bearing, but the beams may also be strengthened by longitudinal reinforcing rods 48. - The reinforcement in the
concrete slab 44 and itsbeams 47 is extremely simple. It can therefore be installed rapidly, which reduces the time required for construction. - The upper flanges of the
primary beams 12 are arched in the central portion located between the secondary beams, as shown in Figure 1. The arch is essentially the shape that theplates secondary beams upper flanges 23 are straight but inclined. The connection between the arched portion and both straight portions is preferably asymptotic. The attachment of the secondary beams 16-20 joins the arched shape of the upper flanges of the primary- beams. This arch facilitates the installation of the plate, and contributes a slope suitable for the deck of a parking garage. In addition, there can be a thickening of the concrete toward the middle if the surface of the concrete is placed straight against a ridge above the center of the primary beam which is advantageous for a parking garage, since that is where the driving lanes are preferably located. Between the ends of theprimary beams drain conduits 22 run connected to drain pipes, along with thesupport pillar 15 for the primary beams. The drain conduits drain not only the surface of the concrete, but also the formwork plate if moisture develops between the formwork plate and the concrete. The plate therefore constitutes an extra sealing layer. - Figure 3 shows an alternative embodiment, in which the trapezoidal corrugated plate has an
upper flange 50, which is wide enough to completely cover theupper flange 23 of the primary beam. Theupper flange 50 has transverse reinforcing embossments to increase its rigidity, and theseams upper flanges 50 or somewhat higher, as shown in the figure. Each plate therefore comprises one-half narrowlower flanges upper flange 50. The vertical seams form reinforcements for the concrete. Alower flange 52 and :lower flange 53 on a plate next to it therefore together form one complete bottom flange. A reinforcement against cracking in the form of a mesh can also be used, as shown in Figure 2. The sheet metal in the vertical seams can also be provided with small bosses or indentations to increase its adhesion to the concrete. This design of the plates shown in Fig 3 can shorten the time required for construction even further.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88906197T ATE77116T1 (en) | 1987-06-29 | 1988-06-29 | FLOOR STRUCTURE FOR BUILDING. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8702678A SE461108B (en) | 1987-06-29 | 1987-06-29 | BJAELKLAG FOR BUILDINGS |
SE8702678 | 1987-06-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0385998A1 EP0385998A1 (en) | 1990-09-12 |
EP0385998B1 true EP0385998B1 (en) | 1992-06-10 |
Family
ID=20369002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19880906197 Expired EP0385998B1 (en) | 1987-06-29 | 1988-06-29 | Floor structure for buildings |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0385998B1 (en) |
DE (1) | DE3871960T2 (en) |
DK (1) | DK164959C (en) |
FI (1) | FI896312A0 (en) |
NO (1) | NO895223D0 (en) |
SE (2) | SE461108B (en) |
WO (1) | WO1989000224A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ240185A (en) * | 1990-10-11 | 1993-11-25 | Robert Cameron Reid | Concrete floor system with metal formwork and bar chairs |
WO2006064989A1 (en) * | 2004-12-16 | 2006-06-22 | B.B.M Korea Co., Ltd | Deck plate for reinforced concrete structure and structure construction method thereof |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US602274A (en) * | 1898-04-12 | Sheet or plate girder | ||
DE1056347B (en) * | 1958-04-25 | 1959-04-30 | Maschf Augsburg Nuernberg Ag | Method for prestressing steel beams, in particular beams of a composite panel |
US3147571A (en) * | 1959-03-20 | 1964-09-08 | Bethlehem Steel Corp | Concrete bridging beam form |
US3251167A (en) * | 1963-04-05 | 1966-05-17 | Robertson Co H H | Composite concrete floor construction and unitary shear connector |
US3462902A (en) * | 1965-12-20 | 1969-08-26 | Robertson Co H H | Composite floor construction |
US3527007A (en) * | 1968-08-12 | 1970-09-08 | Ira J Mcmanus | Steel joist connection and end connection therefor |
US3720029A (en) * | 1970-07-02 | 1973-03-13 | Robertson Co H H | Flooring section and composite floor utilizing the same |
CA1172463A (en) * | 1983-01-17 | 1984-08-14 | Felix Laurus | Double top chord |
US4653237A (en) * | 1984-02-29 | 1987-03-31 | Steel Research Incorporated | Composite steel and concrete truss floor construction |
-
1987
- 1987-06-29 SE SE8702678A patent/SE461108B/en not_active IP Right Cessation
-
1988
- 1988-06-29 WO PCT/SE1988/000358 patent/WO1989000224A1/en active IP Right Grant
- 1988-06-29 EP EP19880906197 patent/EP0385998B1/en not_active Expired
- 1988-06-29 DE DE8888906197T patent/DE3871960T2/en not_active Expired - Fee Related
-
1989
- 1989-01-19 SE SE8900176A patent/SE461109B/en not_active IP Right Cessation
- 1989-12-22 DK DK660089A patent/DK164959C/en not_active IP Right Cessation
- 1989-12-22 NO NO895223A patent/NO895223D0/en unknown
- 1989-12-28 FI FI896312A patent/FI896312A0/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DK660089A (en) | 1989-12-22 |
DK660089D0 (en) | 1989-12-22 |
FI896312A0 (en) | 1989-12-28 |
SE461109B (en) | 1990-01-08 |
EP0385998A1 (en) | 1990-09-12 |
SE8702678D0 (en) | 1987-06-29 |
NO895223L (en) | 1989-12-22 |
DE3871960D1 (en) | 1992-07-16 |
DE3871960T2 (en) | 1993-02-18 |
SE461108B (en) | 1990-01-08 |
DK164959B (en) | 1992-09-21 |
SE8900176D0 (en) | 1989-01-19 |
WO1989000224A1 (en) | 1989-01-12 |
NO895223D0 (en) | 1989-12-22 |
SE8702678L (en) | 1988-12-30 |
DK164959C (en) | 1993-02-15 |
SE8900176L (en) | 1989-01-19 |
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