EP1156171A1 - 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 PDFInfo
- Publication number
- EP1156171A1 EP1156171A1 EP01400776A EP01400776A EP1156171A1 EP 1156171 A1 EP1156171 A1 EP 1156171A1 EP 01400776 A EP01400776 A EP 01400776A EP 01400776 A EP01400776 A EP 01400776A EP 1156171 A1 EP1156171 A1 EP 1156171A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- formwork
- floor
- element according
- rectangle
- soles
- 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
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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 formwork element made of sheet steel profiled for the production of a floor with collaborating metal bins made with reinforced concrete poured into said formwork.
- the type of floor cast in a formwork composed of an assembly of metallic profile elements is produced in the building sector, such as homes, hotels, hospitals, industrial buildings or for parking lots.
- embossings are currently used to make the collaborating formwork.
- Collaborative formwork means that the formwork remains permanently and brings to the constructed floor its mechanical properties in tension and bending of steel in the general design of so-called reinforced concrete. Proportions geometry of the sheet and the arrangement of the embossings have a great influence on the resistance of the formwork during the construction phase, when mounting said formwork, in the pouring phase and also on the effectiveness of the collaboration between the steel formwork elements associated with the concrete filling, after the hardening of it.
- embossings constitute localized deformations produced on the flat surfaces of the profile, said deformations forming stamped in particular of the type, round button, oval button, transverse rib, notching, chevron or any other image.
- Embossing can be carried out on the tops of the profile, on the soles as well as on the omega souls.
- the existing solutions are generally based on an arbitrary choice of the geometric form of embossings, that is to say the reason for 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 completely 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 material resistance.
- the performance criteria can often be contradictory, in the sense that the improvement of one criterion can lead to the degradation of another.
- embossings placed on the soles or too close to the sole-core angles often improve the collaboration with the concrete, but lead to the weakening of the effective cross-section and consequently to the loss of performance in casting.
- the embossings in the form of a continuous notch generating in section, a ripple or else, the embossings insufficiently inclined and or spaced increase the resistance to the punching of the cores on the supports, but, on the other hand, reduce the effective section and generate parasitic internal compressive stresses in the flat parts, causing local instabilities such as buckling, premature breakdown.
- the decrease in the slope of the cores 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 metal and the concrete.
- the object of the invention is to propose a formwork element made of sheet steel profiled for the production of a floor with collaborating metal bins made with reinforced concrete poured into said formwork leading to the realization of the floor, to a substantial gain, from the point of view of performance in mixed phase, compared to existing floors of the open profile type, while remaining competitive in terms of performance during the casting phase as well as in terms of surface weight of the element and the formwork.
- the invention also relates to a floor with collaborating metal bins made of concrete that can be reinforced, poured into a formwork made elements of which at least one element of the formwork comprises on the webs, long drawn stamps, each arranged on the diagonal of a rectangle having a side substantially equal to the width of the core, the general shape of each stamped, representing a pattern, being included alone in said rectangle.
- Figures 1a, 1b, 1c respectively show a floor in section along the invention, part of an omega-shaped element, and an assembly of two end wings having an interlocking of two elements.
- FIGS 2a and 2b show another embodiment of an element according to the invention.
- Figure 3 is a block diagram of measuring characteristics mechanics of a floor with collaborating metal bins.
- FIG. 4 represents curves of mechanical characteristics of a floor according to the invention in comparison with the mechanical characteristics a reference floor.
- the invention relates, as shown in Figures 1a, 1b, 1c, a formwork element 2 made of profiled sheet steel, which can be galvanized, for the realization of a floor 3 with metal trays 4 collaborators made with concrete reinforced 5 cast in said formwork 2, the element 1 having a profile composed of a succession of shapes 7 in omega, including a vertex 8, on both sides from which two souls 9 inclined relative to the plane of the apex 8 extend, and two soles 10 substantially parallel to the general plane 11 of the floor 3, the assembly of the elements by the end flanges generating bins metallic 4 of formwork 2.
- the element 1 comprises on the cores 9, stampings 12 elongated, 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 patterns forming inclined notches so that the straight cross section only crosses a single pattern, on a very limited distance, thus not leading to a significant loss of section resistance.
- the number of patterns per linear meter depends on the width of the web and the inclination of the diagonals as shown in the figure 1b.
- Preferably the number of patterns is approximately 25 per linear meter of each omega core of the profile.
- stampings in the example, in the form of a gutter, protrude from the side metal formwork trays 4.
- a shape 7 is shown in omega of part of formwork element 1 2, the shape being trapezoidal, but this shape could be also rectangular or dovetailed.
- FIGs 1b and 1c the soles 10 and the top 8 of a shape 7 in omega on which is made at least one longitudinal fold 15 forming a stiffening and or interlocking groove whose role is to improve the buckling resistance.
- the socket is shown in Figure 1c which represents the wings at the ends of two elements 1 joined for mounting a formwork 2.
- FIGs 2a and 2b give another embodiment of the invention in which the folds 15 of the wings are made near the soul-sole angle of so as to fix the hollow connectors on the beams support.
- the geometric shape of the section preferably in omega and on the other hand the form of the embossings, their arrangement, spacing and inclination, a very significant gain is obtained on the mechanical performance of the floor, around 70 to 100%, compared to existing floors, while minimizing the formwork weight per unit area.
- Tests determined the calculation parameters of the slab in phase mixed, by the method called "m” and "k”, and used for the technical analysis of floor.
- the service limit state according to the “m” and “k” method consists in respecting an inequality concerning the shear stress of sliding between the element in sheet metal and concrete, the stress of the stressing force being less than the stress of the resistant effort of the floor.
- the testing device is shown in Figure 3 which shows a diagram static tests, with a provision of loads and instruments measures.
- the floor 3 on two simple supports 16 is subjected to the actuation of a jack 17. It is measured on the one hand, the deflection deflection of the floor by means of a measuring instrument 18 and 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 curves for comparing the resistance of two floors, the curves giving values of limit slip resistance and limit load, on the one hand, for a floor according to the invention and on the other hand for a comparison floor, and this as a function of different ranges represented by the value 4I s .
- comparison floor is a floor whose element has a profile composed of a succession of trapezoidal omega shapes, including a top, two soles substantially parallel to the general plane of the floor, the assembly of the elements by the soles generating metal bins of formwork, the element comprising on the webs, elongated stampings, joined forming, along a longitudinal section of the core, undulations.
- the gain on the limit loads obtained with the floor produced with the elements of the invention is between 70% and 100%, with in addition, the weight of the element reduced by 3.5%, compared to the comparison floor.
- the required thickness of the comparison floor is of the order of 30% to 50% higher.
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)
Abstract
Description
- le profil dit « ouverts » dans lequel le profil oméga a une forme générale trapézoïdale ou rectangulaire.
- le profil dit « fermés » dans lequel le profil oméga a une forme générale en queue d'aronde.
Dans un autre exemple, la diminution de la pente des âmes permet d'accroítre la largeur utile du bac, mais, par contre, réduit l'efficacité de la collaboration entre la tôle et le béton.
Les autres caractéristiques de l'invention sont :
- les emboutis définissent un nombre de motifs au mètre linéaire en fonction de la largeur de l'âme et de l'inclinaison des diagonales qui est comprise entre 20° et 45°.
- l'embouti forme saillie du coté des bacs métalliques de coffrage.
- l'embouti forme une gouttière.
- les semelles et le sommet comportent au moins un pli longitudinal formant une rainure de raidissement et ou d'emboítement.
- l'élément profilé est galvanisé.
Poids ( daN/m2 ) | ||||||
Tôle d'épaisseur 0,75mm | Epaisseur totale du plancher ( cm ) | |||||
10 | 12 | 14 | 16 | 20 | ||
Comparaison | 8,83 | 156 | 204 | 252 | 300 | 396 |
Plancher selon l'invention | 8,42 | 155 | 203 | 251 | 299 | 395 |
Claims (8)
- Elément de coffrage en tôle d'acier profilée pour la réalisation d'un plancher à bacs métalliques collaborants réalisés avec du béton armé coulé dans ledit coffrage, l'élément présentant un profil composé d'une succession de formes en oméga, chaque forme comprenant un sommet, de part et d'autre duquel s'étendent deux âmes inclinées par rapport au plan du sommet, et deux semelles sensiblement parallèles au plan général du plancher, l'assemblage des éléments par les semelles d'extrémité générant des bacs métalliques de coffrage, caractérisé en ce que l'élément comporte sur les âmes, des emboutis longilignes, disposés chacun, sur la diagonale d'un rectangle ayant un coté sensiblement égal à la largeur de l'âme, la forme générale de chaque embouti, représentant un motif, étant incluse seule dans ledit rectangle.
- Elément selon la revendication 1 caractérisé en ce que la section de l'oméga est trapézoïdale.
- Elément selon la revendication 1 caractérisé en ce que les emboutis définissent un nombre de motifs au mètre linéaire fonction de la largeur de l'âme et de l'inclinaison des diagonales qui est comprise entre 20° et 45°.
- Elément selon la revendication 1 caractérisé en ce que l'embouti forme saillie du coté des bacs métalliques de coffrage.
- Elément selon la revendication 1 caractérisé en ce que l'embouti forme une gouttière.
- Elément selon la revendication 1 caractérisé en ce que les semelles et le sommet comportent au moins un pli longitudinal formant une rainure de raidissement et ou d'emboítement.
- Elément selon la revendication 1 caractérisé en ce que l'élément profilé est galvanisé.
- Plancher à bacs métalliques collaborants réalisés avec du béton pouvant être renforcé, coulé dans un coffrage constitué d'éléments selon les revendications de 1 à 7, caractérisé en ce qu'au moins un élément du coffrage comporte sur les âmes, des emboutis longilignes, disposés chacun, sur la diagonale d'un rectangle ayant un coté sensiblement égal à la largeur de l'âme, la forme générale de chaque embouti, représentant un motif, étant incluse seule dans ledit rectangle.
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 true EP1156171A1 (fr) | 2001-11-21 |
EP1156171B1 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 (fr) |
AT (1) | ATE349582T1 (fr) |
CY (1) | CY1108615T1 (fr) |
DE (1) | DE60125457T2 (fr) |
DK (1) | DK1156171T3 (fr) |
ES (1) | ES2275633T3 (fr) |
FR (1) | FR2807081B1 (fr) |
PL (1) | PL208701B1 (fr) |
PT (1) | PT1156171E (fr) |
Families Citing this family (2)
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. |
Citations (3)
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 |
-
2000
- 2000-03-29 FR FR0003960A patent/FR2807081B1/fr not_active Expired - Lifetime
-
2001
- 2001-03-27 AT AT01400776T patent/ATE349582T1/de active
- 2001-03-27 DK DK01400776T patent/DK1156171T3/da active
- 2001-03-27 ES ES01400776T patent/ES2275633T3/es not_active Expired - Lifetime
- 2001-03-27 PT PT01400776T patent/PT1156171E/pt unknown
- 2001-03-27 EP EP01400776A patent/EP1156171B1/fr not_active Expired - Lifetime
- 2001-03-27 DE DE60125457T patent/DE60125457T2/de not_active Expired - Lifetime
- 2001-03-29 PL PL346789A patent/PL208701B1/pl unknown
-
2007
- 2007-03-27 CY CY20071100424T patent/CY1108615T1/el unknown
Patent Citations (3)
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 |
EP1156171B1 (fr) | 2006-12-27 |
FR2807081B1 (fr) | 2002-09-13 |
CY1108615T1 (el) | 2014-04-09 |
DE60125457T2 (de) | 2007-09-27 |
DE60125457D1 (de) | 2007-02-08 |
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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