WO2008111920A2 - High profiled sheet metal for composite decks - Google Patents

High profiled sheet metal for composite decks Download PDF

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Publication number
WO2008111920A2
WO2008111920A2 PCT/SI2008/000015 SI2008000015W WO2008111920A2 WO 2008111920 A2 WO2008111920 A2 WO 2008111920A2 SI 2008000015 W SI2008000015 W SI 2008000015W WO 2008111920 A2 WO2008111920 A2 WO 2008111920A2
Authority
WO
WIPO (PCT)
Prior art keywords
sheet metal
invention according
concrete
profiled sheet
profile
Prior art date
Application number
PCT/SI2008/000015
Other languages
French (fr)
Other versions
WO2008111920A3 (en
Inventor
Darko Beg
Igor Gorup
Original Assignee
Trimo D.D.
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 Trimo D.D. filed Critical Trimo D.D.
Publication of WO2008111920A2 publication Critical patent/WO2008111920A2/en
Publication of WO2008111920A3 publication Critical patent/WO2008111920A3/en

Links

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

Definitions

  • composite deck is a system comprised of sheet metal and concrete, preferably reinforced for construction of roofs, ceilings, floors and other types of construction, which would form suitable construction and at the same time:
  • - plates e.g. from wood, so called plywood
  • - beams and fillings e.g. from brick and concrete
  • the invention represents new implementation of element of high profiled sheet metal for composite decks, and is used for constructional system of composite decks (ceilings, roofs, etc.)
  • the proposed high profiled sheet metal along with metal truss and hardened concrete forms composite ceiling platform and has the following properties during construction: works as working platform works as formwork for concrete which does not need additional support at moderate spans;
  • High profiled sheet metal is designed in such a way that at as low production cost as possible and as low material consumption as possible provides for as high carrying capacity as possible and conserves above referenced properties.
  • the form of profile of sheet metal is adapted predominantly to assembly condition where one needs to provide for load at as high of a span as possible.
  • the main parameters of high profiled sheet metal are therefore height of cross section as well as thickness of sheet metal.
  • For load capacity in composite condition one needs to take into account along with thickness of concrete plate also resistance to axial shear, said resistance dependent along with adhesive connection between concrete and sheet metal also on form of impressions on sheet metal sides which help with their form to achieve higher resistance.
  • the following parameters seem to be of particular importance:
  • the minimum height of the profiles is 74 mm at span of 3, 5 m (without intermediate supports), or 110 mm at span of 5,0 m (without intermediate supports).
  • angle of sides for support of mechanical properties as appropriate for various dimensions and profiles of high profiled sheet metal (as well as for both embodiments shown) the angle of 70(+-5)° was found. Increasing the angle of side support (sides) larger resistance of the profile against input of concentrated force (reaction over supports) in assembly state is achieved.
  • Fig. 1 shows high profiled sheet metal 1, upper band 2, lower band 3, side (side support) 4, reinforcement of band 5, impression on side 6.
  • Fig. 2 shows high profiled sheet metal 1, upper band 2, lower band 3, side (side support) 4, reinforcement of band 5, impression on side 6.
  • Fig.3 shows high profiled sheet metal.
  • the presented high profiled sheet metal 1 provides for requested load carrying capacity at optimized profile and properties of the sheet metal without additional support in phase of assembly and concrete pouring at span of 3,5 m at height of the profile at least 74 mm.
  • the sheet metal has completely original form with projected form of profile within range of upper band 2.
  • the form provides for better connectivity between concrete and sheet metal in vertical direction and consequently better resistance to axial shear.
  • Good side of such projected (protruded) form is to reduce free height of side 4 and/or to work as reinforcement.
  • the lower band 3 and the upper band 4 have triangular reinforcement 5 in the middle of the field (one or several) which reduces influence of local projection.
  • the lower band is in this embodiments a bit narrower whereby the own weight of the concrete for assembly state is reduced.
  • said protrusions of K form said form increasing resistance of sheet metal on axial shear.
  • the height of high profiled sheet metal is 74 mm
  • the width of the upper band is 118,85 mm
  • the widths of the lower band is 100 mm.
  • the triangular reinforcements are performed in form of right-angled triangle with right angle on the middle of the reinforcement and depth or height of 10 mm.
  • the sides are positioned relative to bands at the angle of 70° (or 110°).
  • the tops of the impressions on the upper band are at height of 62 mm, their distance is 127,59 mm.
  • the total width of particular profile is 255,95 mm.
  • the inner angle of the protrusions on upper band is 100°.
  • the height of the projection parallel to side is 8 mm, all round-offs on the subject of the invention are performed with radius of 3,6 mm.
  • the essential properties of high profiled sheet metal do not significantly deviate from conservation of dimensions or angles in the range of +- 10°.
  • Fig. 2 the example with higher carrying load is shown.
  • the presented high profiled sheet metal 1 provides for requested load carrying capacity at optimized profile and properties of the sheet metal without additional support in phase of assembly and concrete pouring at span of 5,0 m at height of the profile at least 110 mm.
  • the sheet metal has completely original form with projected form of profile within range of upper band 2.
  • the form provides for better connectivity between concrete and sheet metal in vertical direction and consequently better resistance to axial shear.
  • Good side of such projected (protruded) form is to reduce free height of side 4 and/or to work as reinforcement.
  • the lower band 3 and the upper band 4 have triangular reinforcement 5 in the middle of the field (one or several) which reduces influence of local projection.
  • the lower band is in this embodiments a bit narrower whereby the own weight of the concrete for assembly state is reduced.
  • the protrusions of K form When providing for attachment of the load onto the profile a simple possibility with hooking can be accomplished.
  • said protrusions of K form said form increasing resistance of sheet metal on axial shear.
  • the height of high profiled sheet metal is 110 mm
  • the width of the upper band is 135 mm
  • the width of the lower band is 100 mm.
  • the triangular reinforcements are performed in form of right- angled triangle with right angle on the middle of the reinforcement and depth or height of 10 mm.
  • the sides are positioned relative to bands at the angle of 70° (or 110°).
  • the tops of the impressions on the upper band are at height of 84,06 mm, their distance is 153,28 mm.
  • the total width of particular profile is 294,11 mm.
  • the inner angle of the protrusions on upper band is 100°.
  • the height of the projection parallel to side is 10 mm, all round-offs on the subject of the invention are performed with radius of 3,6 mm.
  • the essential properties of high profiled sheet metal do not significantly deviate from conservation of dimensions or angles in the range of +- 10°.
  • Fig. 3 shows high profiled sheet metal as described in the second embodiment.

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)
  • Laminated Bodies (AREA)

Abstract

The invention represents new implementation of element of high profiled sheet metal for composite decks, and is used for constructional system of composite decks (ceilings, roofs, etc.) The proposed high profiled sheet metal (1) along with metal truss and hardened concrete forms composite ceiling platform and has the following properties during construction: works as working platform - works as formwork for concrete which does not need additional support at moderate spans; - works as tensile metal truss for reinforced concrete; - has decorative look; is designed in such a way as to enable connection of light loads from below such as for example installations and lowered ceilings. High profiled sheet metal (1) is designed in such a way that at as low production cost as possible and as low material consumption as possible provides for as high carrying capacity as possible and conserves above referenced properties.

Description

High profiled sheet metal for composite decks
DESCRIPTION OF INVENTION
Technology field
High profiled sheet metal, composite decks, working platform, formwork for concrete, tensile metal truss
Description of problem
There is no sheet metal on the market earmarked for construction system of composite decks (for the purposes of this application the composite deck is a system comprised of sheet metal and concrete, preferably reinforced for construction of roofs, ceilings, floors and other types of construction) which would form suitable construction and at the same time:
- works as working platform; works as formwork for concrete which does not need additional support at moderate spans; works as metal truss for reinforced concrete; is designed in such a way as to enable connection of light loads from below such as for example installations and lowered ceilings, and is designed to have decorative look.
To ensure all of these functions one had to assemble several elements meaning higher cost, more necessary time for assembly, and more material used.
State of the art
Overview of available literature shows wide use of formwork for concrete
For formwork for concrete one usually uses:
- plates (e.g. from wood, so called plywood) which need to be additionally supported and are removed after concrete has been poured along with support; - beams and fillings (e.g. from brick and concrete) which need to be additionally supported during concrete pouring;
- commercially made pre-fabricated concrete elements manufactured in plants and delivered to construction site ...
For assembly of ceilings and decks there are several different profiles to be found in literature as well as profiled metal sheet which does not ensure properties of working platform, capability of use as formwork for concrete and do not have appropriate characteristics to be used as tensile metal truss for reinforced concrete.
For different networks (electrical, telecommunication, computer, ...) one finds several types and forms of channels in the literature, however, there is no element which would as a single product combine all of these functional properties with optimized form for good load capacity and low consumption of material.
Description of new invention
The invention represents new implementation of element of high profiled sheet metal for composite decks, and is used for constructional system of composite decks (ceilings, roofs, etc.) The proposed high profiled sheet metal along with metal truss and hardened concrete forms composite ceiling platform and has the following properties during construction: works as working platform works as formwork for concrete which does not need additional support at moderate spans;
- works as tensile metal truss for reinforced concrete;
- has decorative look;
- is designed in such a way as to enable connection of light loads from below such as for example installations and lowered ceilings. High profiled sheet metal is designed in such a way that at as low production cost as possible and as low material consumption as possible provides for as high carrying capacity as possible and conserves above referenced properties.
The subject of this invention has undergone serious numerical simulations the results of which have been confirmed with experiment. Based on numerical and experimental analysis it was confirmed that presented high profiled sheet metal provides for required loads without additional support in phase of assembly and concrete pouring:
- at span of 3,5 m with profiles height at least 74 mm, and
- at span of 5 m with profiles height at least 110 mm
(of course both at optimized profile cross section and sheet metal properties)
The form of profile of sheet metal is adapted predominantly to assembly condition where one needs to provide for load at as high of a span as possible. The main parameters of high profiled sheet metal are therefore height of cross section as well as thickness of sheet metal. For load capacity in composite condition one needs to take into account along with thickness of concrete plate also resistance to axial shear, said resistance dependent along with adhesive connection between concrete and sheet metal also on form of impressions on sheet metal sides which help with their form to achieve higher resistance. For optimization or final design of high profiled sheet metal the following parameters seem to be of particular importance:
- limitation of height: for providing of adequate mechanical properties it was found that the minimum height of the profiles is 74 mm at span of 3, 5 m (without intermediate supports), or 110 mm at span of 5,0 m (without intermediate supports).
- the ratio of widths of upper and lower bands: at narrower lower band use of concrete is lower, however, the load carrying capacity can be reduced due to non-symmetry, the fire resistance is lower, it is harder to build into the plugs.
- provision of resistance on axial shear between sheet metal and concrete: at opened profiles said resistance is lower as at closed. For typical closed profiles the lower band is very wide which provides for high fire resistance, however, results in heavier plate which is seen on properties in assembly state. The shown embodiments (high profiled sheet metal with profile heights of 74 and 110 milimeters) are designed is such a fashion to optimally combine positive properties of open and closed forms. optimization of form for ensuring easier attachment of lighter loads on composite deck ("ceiling"): for assembly of installations, lowered ceilings and/or other loads which do not exceed predetermined point load (e.g. IkN) the sheet metals are designed in such a way as to ensure easy attachment with hooking or simple attaching systems.
- optimization of angle of sides for support of mechanical properties: as appropriate for various dimensions and profiles of high profiled sheet metal (as well as for both embodiments shown) the angle of 70(+-5)° was found. Increasing the angle of side support (sides) larger resistance of the profile against input of concentrated force (reaction over supports) in assembly state is achieved.
- optimized reinforcement in bands: with optimization of reinforcement the stiffness increases as well as local stability of the sheet metal. The reinforcement are performed in such a way that a compromise is made between carrying load of a profile and use of material. At the same time the reinforcements are optimized in such a way that with larger reinforcement one cannot achieve significantly larger carrying load.
The essence of this invention is explained in greater detail below with description of embodiments and attached figures whereby the figures form a part of this patent application, and show as follows:
Fig. 1 shows high profiled sheet metal 1, upper band 2, lower band 3, side (side support) 4, reinforcement of band 5, impression on side 6.
Fig. 2 shows high profiled sheet metal 1, upper band 2, lower band 3, side (side support) 4, reinforcement of band 5, impression on side 6. Fig.3 shows high profiled sheet metal.
In first embodiment as shown in Fig. 1 the embodiment with lower load carrying capacity is shown. The presented high profiled sheet metal 1 provides for requested load carrying capacity at optimized profile and properties of the sheet metal without additional support in phase of assembly and concrete pouring at span of 3,5 m at height of the profile at least 74 mm. The sheet metal has completely original form with projected form of profile within range of upper band 2. The form provides for better connectivity between concrete and sheet metal in vertical direction and consequently better resistance to axial shear. Good side of such projected (protruded) form is to reduce free height of side 4 and/or to work as reinforcement. The lower band 3 and the upper band 4 have triangular reinforcement 5 in the middle of the field (one or several) which reduces influence of local projection. The lower band is in this embodiments a bit narrower whereby the own weight of the concrete for assembly state is reduced. When providing for attachment of the load onto the profile a simple possibility with hooking can be accomplished. Into the side protrusions 6 are impressed, said protrusions of K form, said form increasing resistance of sheet metal on axial shear. In particular embodiment the height of high profiled sheet metal is 74 mm, the width of the upper band is 118,85 mm, the widths of the lower band is 100 mm. The triangular reinforcements are performed in form of right-angled triangle with right angle on the middle of the reinforcement and depth or height of 10 mm. The sides are positioned relative to bands at the angle of 70° (or 110°). The tops of the impressions on the upper band are at height of 62 mm, their distance is 127,59 mm. The total width of particular profile is 255,95 mm. The inner angle of the protrusions on upper band is 100°. The height of the projection parallel to side is 8 mm, all round-offs on the subject of the invention are performed with radius of 3,6 mm. The essential properties of high profiled sheet metal do not significantly deviate from conservation of dimensions or angles in the range of +- 10°. In second embodiment shown in Fig. 2 the example with higher carrying load is shown. The presented high profiled sheet metal 1 provides for requested load carrying capacity at optimized profile and properties of the sheet metal without additional support in phase of assembly and concrete pouring at span of 5,0 m at height of the profile at least 110 mm. The sheet metal has completely original form with projected form of profile within range of upper band 2. The form provides for better connectivity between concrete and sheet metal in vertical direction and consequently better resistance to axial shear. Good side of such projected (protruded) form is to reduce free height of side 4 and/or to work as reinforcement. The lower band 3 and the upper band 4 have triangular reinforcement 5 in the middle of the field (one or several) which reduces influence of local projection. The lower band is in this embodiments a bit narrower whereby the own weight of the concrete for assembly state is reduced. When providing for attachment of the load onto the profile a simple possibility with hooking can be accomplished. Into the side protrusions 6 are impressed, said protrusions of K form, said form increasing resistance of sheet metal on axial shear. In particular embodiment the height of high profiled sheet metal is 110 mm, the width of the upper band is 135 mm, the width of the lower band is 100 mm. The triangular reinforcements are performed in form of right- angled triangle with right angle on the middle of the reinforcement and depth or height of 10 mm. The sides are positioned relative to bands at the angle of 70° (or 110°). The tops of the impressions on the upper band are at height of 84,06 mm, their distance is 153,28 mm. The total width of particular profile is 294,11 mm. The inner angle of the protrusions on upper band is 100°. The height of the projection parallel to side is 10 mm, all round-offs on the subject of the invention are performed with radius of 3,6 mm. The essential properties of high profiled sheet metal do not significantly deviate from conservation of dimensions or angles in the range of +- 10°.
Fig. 3 shows high profiled sheet metal as described in the second embodiment.
It is self evident that the described solution can be performed in different embodiment without loss to essence of the invention.

Claims

PATENT CLAIMS
1. High profiled sheet metal for composite decks (ceilings), or provided for construction system of composite decks, characterized in that together with reinforced concrete comprises composite ceiling plate and has the following characteristics during construction:
- works as working platform
- works as formwork for concrete which does not need additional support at moderate spans; works as tensile metal truss for reinforced concrete;
- has decorative look;
- is designed in such a way as to enable connection of light loads from below such as for example installations and lowered ceilings.
2. Invention according to claim 1, characterized in that the profile is composed of upper band (2) and of lower band (3), of sides (4), of reinforcements (5), and of impressions (6) into the sides (4), said impressions having protruding design.
3. Invention according to any of the preceding claims, characterized in that the height of the profile is at least 74 mm in order to provide for minimum span of 3,5 m without additional intermediate supports during concrete pouring.
4. Invention according to any of the preceding claims, characterized in that the height of the profile is at least 110 mm in order to provide for minimum span of 5,0 m without additional intermediate supports during concrete pouring.
5. Invention according to any of the preceding claims, characterized in that the impressions (6) provide for increased resistance to axial shear, said resistance dependent on shape of said impressions, said impressions having preferably K design.
6. Invention according to any of the preceding claims, characterized in that the lower band (3) is narrower than the upper band (2) in order to reduce own weight of a concrete.
7. Invention according to any of the preceding claims, characterized in that the high profiled sheet metal is designed in such a way as to increase carrying load at as low manufacturing cost as possible and as low use of material as possible.
8. Invention according to any of the preceding claims, characterized in that the form of the profile is adapted to assembly state to ensure load carrying capability at as large span as possible.
9. Invention according to any of the preceding claims, characterized in that it is optimized according to limitation of height of the profile, ratio of width of upper and lower bands, providing of resistance to axial shear between sheet metal and concrete, providing for simple attaching of light loads onto composite ceiling, angle of side for providing of mechanical properties as well as stiffness and local stability with optimization of reinforcement in bands.
10. Invention according to any of the preceding claims, characterized in that the sides are at an angle relative to bands of 70°+- 10° (or 110°+- 10°).
11. Invention according to any of the preceding claims, characterized in that one or both bands have at least one triangular reinforcement in the middle.
PCT/SI2008/000015 2007-03-10 2008-03-07 High profiled sheet metal for composite decks WO2008111920A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SIP-200700053 2007-03-10
SI200700053A SI22495A (en) 2007-03-10 2007-03-10 High-profile sheet metal for scarf joined ceilings

Publications (2)

Publication Number Publication Date
WO2008111920A2 true WO2008111920A2 (en) 2008-09-18
WO2008111920A3 WO2008111920A3 (en) 2008-11-20

Family

ID=39739237

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SI2008/000015 WO2008111920A2 (en) 2007-03-10 2008-03-07 High profiled sheet metal for composite decks

Country Status (2)

Country Link
SI (1) SI22495A (en)
WO (1) WO2008111920A2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807081B1 (en) * 2000-03-29 2002-09-13 Pab Est FORMING ELEMENT IN PROFILED STEEL SHEET FOR THE PRODUCTION OF A FLOOR WITH COLLABORATING METAL BINS
ES2291875T3 (en) * 2003-05-13 2008-03-01 Offshield Limited SOIL SET.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
SI22495A (en) 2008-10-31
WO2008111920A3 (en) 2008-11-20

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