EP1156171B1 - Elément de coffrage en tôle d'acier profilée pour la réalisation d'un plancher à bacs métalliques collaborants - Google Patents

Elément de coffrage en tôle d'acier profilée pour la réalisation d'un plancher à bacs métalliques collaborants Download PDF

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Publication number
EP1156171B1
EP1156171B1 EP01400776A EP01400776A EP1156171B1 EP 1156171 B1 EP1156171 B1 EP 1156171B1 EP 01400776 A EP01400776 A EP 01400776A EP 01400776 A EP01400776 A EP 01400776A EP 1156171 B1 EP1156171 B1 EP 1156171B1
Authority
EP
European Patent Office
Prior art keywords
floor
shuttering
rectangle
pressing
formwork
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
EP01400776A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1156171A1 (fr
Inventor
Léopold SOKOL
René Hugel
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.)
ArcelorMittal Construction France SAS
Original Assignee
ArcelorMittal Construction France SAS
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Filing date
Publication date
Application filed by ArcelorMittal Construction France SAS filed Critical ArcelorMittal Construction France SAS
Publication of EP1156171A1 publication Critical patent/EP1156171A1/fr
Application granted granted Critical
Publication of EP1156171B1 publication Critical patent/EP1156171B1/fr
Priority to CY20071100424T priority Critical patent/CY1108615T1/el
Anticipated expiration legal-status Critical
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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

Definitions

  • the present invention relates to a profiled steel sheet formwork element for producing a floor with cooperating metal bins made with reinforced concrete poured into said formwork.
  • the type of floor poured into a formwork consisting of an assembly of metal profiled elements is made in the building sector, such as dwellings, hotels, hospitals, industrial buildings or for car parks.
  • embossings are currently used to produce the collaborating forms.
  • Collaborative formwork is understood to mean that the formwork remains permanently and brings to the floor its mechanical properties in traction and flexing of the steel in the general design of a so-called reinforced concrete.
  • the geometric proportions of the sheet and the arrangement of the embossings have a great influence on the strength of the formwork during the construction phase, during the assembly of said formwork, in the casting phase and also on the efficiency of the collaboration between the formwork elements. steel associated with the concrete filling, after the hardening of it.
  • embossings constitute localized deformations carried out on the flat surfaces of the profile, said deformations forming stampings, in particular of the type, round button, oval button, transverse rib, notching, chevron or any other image.
  • the embossings can be performed on the tops of the profile, on the soles and on the souls of the omega.
  • Existing solutions are generally based on an arbitrary choice of the geometric shape of the embossings, ie the pattern of the deformation as well as the distribution in surface of said patterns, which can be distributed in different ways, in number, in geometry, in density. The result thus obtained is totally random, that is to say that it does not necessarily lead to an optimal compromise between different performance criteria from the point of view of resistance of the materials.
  • the performance criteria can often be contradictory, in the sense that the improvement of one criterion can lead to the degradation of another.
  • embossing placed on the soles or too close to the instep angles often improve the collaboration with the concrete, but lead to the weakening of the cross section and consequently to the loss of casting performance.
  • the embossings in the form of continuous detent generating in section, a corrugation or even insufficiently inclined and spaced embossings increase the puncture resistance of the souls on the supports, but, on the other hand, reduce the cross section and generate internal stresses of compression in the planar parts, causing local instabilities such as buckling, premature breakdown.
  • US 3,397,497 discloses a profiled steel formwork element for the production of a floor with collaborating metal bins made with reinforced concrete poured into the formwork, the element having webs comprising various elongated molded patterns, each arranged, on the diagonal of a rectangle having a side substantially equal to the width of the soul, each rectangle including more than one stamped pattern.
  • the reduction of the slope of the souls makes it possible to increase the useful width of the tank, but, on the other hand, reduces the effectiveness of the collaboration between the sheet and the concrete.
  • the object of the invention is to propose a formwork element made of profiled steel sheet for the realization of a floor with collaborating metal bins made with reinforced concrete poured into said formwork leading during the realization of the floor, to a gain Substantial in terms of mixed-phase performance compared to existing open-profile floors while remaining competitive in casting performance as well as in the surface weight of the element and formwork.
  • the invention also relates to a floor with cooperating metal bins made of reinforced concrete, poured into a formwork consisting of elements of which at least one element of the formwork comprises on the souls, elongated stampings, each arranged on the diagonal of a rectangle having a side substantially equal to the width of the soul, the general shape of each stamp, representing a pattern, being included alone in said rectangle.
  • Figures 1a, 1b, 1c respectively show a sectional floor according to the invention, a portion of an omega-shaped element, and an assembly of two end wings having an interlocking two elements.
  • FIGS 2a and 2b show another embodiment of an element according to the invention.
  • Figure 3 is a block diagram of the measurement of the mechanical characteristics of a floor with cooperating metal bins.
  • FIG. 4 represents curves of mechanical characteristics of a floor according to the invention in comparison with the mechanical characteristics of a reference floor.
  • the invention relates, as shown in FIGS. 1a, 1b, 1c, to a formwork element 1 made of galvanized profiled steel sheet, for producing a floor 3 with cooperating metal bins 4 made of concrete.
  • armature 5 cast in said formwork 2 the element 1 having a profile composed of a succession of forms 7 in omega, comprising a vertex 8, on either side of which extend two webs 9 inclined with respect to the plane of the 8, and two flanges 10 substantially parallel to the general plane 11 of the floor 3, the assembly of the elements by the end flanges generating metal trays 4 of formwork 2.
  • the element 1 comprises on the souls 9, embossed 12 longilines, each arranged on the diagonal 13 of a rectangle having a side 14 substantially equal to the width of the core 9, the general shape of each stamped 12, representing a pattern, being included alone in said rectangle.
  • the stampings 12 define a number of inclined forming patterns inclined so that the right cross section passes through a single pattern, over a very limited distance thus not leading to a significant loss of section strength.
  • the number of patterns per linear meter is a function of the width of the core and the inclination of the diagonals as shown in Figure 1b.
  • Preferably the number of patterns is about 25 per linear meter of each omega core of the profile.
  • the embossed, in the example, shaped gutter are projecting from the side of the metal trays 4 of formwork.
  • FIG. 1b there is shown an omega shape 7 of a part of the formwork element 1 2, the shape being trapezoidal, but this shape could be also rectangular or dovetail.
  • FIG. 1b and 1c show the soles 10 and the crown 8 of an omega shape 7 on which at least one longitudinal fold is formed forming a stiffening and / or interlocking groove whose role is to improve the buckling resistance.
  • the interlocking is shown in FIG. 1c, which represents the wings at the ends of two joined elements 1 for mounting a formwork 2.
  • FIGS. 2a and 2b show another embodiment of the invention in which the folds 15 of the wings are made near the angle of the soul-sole so as to allow the connectors to be fixed in hollow waves on the beams of support.
  • the geometric shape of the preferably omega section and on the other hand the shape of the embossings, their arrangement, spacing and inclination achieves a very significant gain on the mechanical performance of the floor, of the order of 70 to 100%, compared to existing floors, while minimizing the weight of the formwork per unit area.
  • Tests have determined the design parameters of the slab in mixed phase, by the method called "m” and "k”, and used for the technical analysis of the floor.
  • the service limit state according to the "m” and “k” method consists in respecting an inequality concerning the sliding shear stress between the sheet metal element and the concrete, the stress of the biasing force being less than the constraint the resistance of the floor.
  • test device is shown in Figure 3 which shows a static test pattern, with a provision of the loads and measuring instruments.
  • the floor 3 on two simple supports 16 is subjected to the loading of a jack 17. It is measured on the one hand, the deformation arrow of the floor by means of a measuring instrument 18 and of on the other hand, a measurement of the sliding between element 1 and concrete 5 by means of two devices 19.
  • FIG. 4 presents a set of resistance comparison curves of two floors, the curves giving values of resistance to slip and limited load, on the one hand, for a floor according to the invention and on the other hand for a comparison floor, and that according to different ranges represented by the value 4I s .
  • comparison floor is a floor whose element has a profile composed of a succession of omega trapezoidal shapes, comprising a crown, two soles substantially parallel to the general plane of the floor, the assembly of the elements by the soles generating metal shuttering tanks, the element comprising on the souls, longilinear stampings, contiguous forming in a longitudinal section of the core, undulations.
  • the following table shows, for the floor according to the invention and the comparison floor, the self weight of the slabs for different thicknesses of said slabs.
  • Weight (daN / m2) Sheet thickness 0.75mm Total thickness of the floor (cm) 10 12 14 16 20 Comparison 8.83 156 204 252 300 396 Floor according to the invention 8.42 155 203 251 299 395
  • the gain on the limit loads obtained with the floor made with the elements of the invention is between 70% and 100%, with in addition, the weight of the reduced element of 3.5%, compared to the comparison floor .
  • the necessary thickness of the comparison floor is of the order of 30% to 50% higher.
  • the element according to the invention can ensure the realization of floors reaching a total thickness, with extension, of 28 cm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Coating With Molten Metal (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Steps, Ramps, And Handrails (AREA)
  • Panels For Use In Building Construction (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Floor Finish (AREA)
EP01400776A 2000-03-29 2001-03-27 Elément de coffrage en tôle d'acier profilée pour la réalisation d'un plancher à bacs métalliques collaborants Expired - Lifetime EP1156171B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CY20071100424T CY1108615T1 (el) 2000-03-29 2007-03-27 Στοιχειο καλουπιου απο χαλυβδινο ελασμα διαμορφωμενο για την κατασκευη ενος δαπεδου με συνεργαζομενα μεταλλικα κοιλωματα

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0003960A FR2807081B1 (fr) 2000-03-29 2000-03-29 Element de coffrage en tole d'acier profilee pour la realisation d'un plancher a bacs metalliques collaborants
FR0003960 2000-03-29

Publications (2)

Publication Number Publication Date
EP1156171A1 EP1156171A1 (fr) 2001-11-21
EP1156171B1 true EP1156171B1 (fr) 2006-12-27

Family

ID=8848606

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01400776A Expired - Lifetime EP1156171B1 (fr) 2000-03-29 2001-03-27 Elément de coffrage en tôle d'acier profilée pour la réalisation d'un plancher à bacs métalliques collaborants

Country Status (9)

Country Link
EP (1) EP1156171B1 (el)
AT (1) ATE349582T1 (el)
CY (1) CY1108615T1 (el)
DE (1) DE60125457T2 (el)
DK (1) DK1156171T3 (el)
ES (1) ES2275633T3 (el)
FR (1) FR2807081B1 (el)
PL (1) PL208701B1 (el)
PT (1) PT1156171E (el)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI22495A (sl) * 2007-03-10 2008-10-31 Trimo D.D. Visokoprofilirana pločevina za sovprežne stropove
ES2344389B2 (es) 2008-06-16 2011-06-02 Universitat Politècnica De Catalunya Sistema para la conexion entre chapa de acero y hormigon.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397497A (en) * 1966-11-28 1968-08-20 Inland Steel Products Company Deck system
CA917394A (en) * 1970-05-21 1972-12-26 L. Lockshin Louis Floor deck
US4453364A (en) * 1980-05-27 1984-06-12 Ting Raymond M L Corrugated steel decking section

Also Published As

Publication number Publication date
DK1156171T3 (da) 2007-03-19
FR2807081B1 (fr) 2002-09-13
CY1108615T1 (el) 2014-04-09
DE60125457T2 (de) 2007-09-27
DE60125457D1 (de) 2007-02-08
EP1156171A1 (fr) 2001-11-21
PL346789A1 (en) 2001-10-08
ES2275633T3 (es) 2007-06-16
FR2807081A1 (fr) 2001-10-05
ATE349582T1 (de) 2007-01-15
PT1156171E (pt) 2007-02-28
PL208701B1 (pl) 2011-05-31

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