EP1156171B1 - Shuttering element made of profiled steel sheet for the construction of floors with collaborative metal form-slabs - Google Patents
Shuttering element made of profiled steel sheet for the construction of floors with collaborative metal form-slabs Download PDFInfo
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- 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
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- Prior art keywords
- floor
- shuttering
- rectangle
- pressing
- formwork
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- 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.
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- 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)
- Floor Finish (AREA)
- Coating With Molten Metal (AREA)
- Steps, Ramps, And Handrails (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Panels For Use In Building Construction (AREA)
Abstract
Description
La présente invention concerne un élément 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. Le type de plancher coulé dans un coffrage composé d'un assemblage d'éléments profilés métalliques est réalisé dans le domaine du bâtiment, tels qu'habitations, hôtels, hôpitaux, bâtiments industriels ou pour des parkings.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.
De multiples formes géométriques de profils avec différents dispositifs de déformations locales dites embossages sont actuellement utilisés pour réaliser les coffrages collaborants.Multiple geometric shapes of profiles with different local deformation devices known as embossings are currently used to produce the collaborating forms.
On entend par coffrage collaborant le fait que le coffrage reste à demeure et apporte au plancher construit ses propriétés mécaniques en traction et flexion de l'acier dans la conception générale d'un béton dit armé. Les proportions géométriques de la tôle et la disposition des embossages ont une grande influence sur la résistance du coffrage en phase de chantier, au moment du montage dudit coffrage, en phase de coulage et également sur l'efficacité de la collaboration entre les éléments de coffrage en acier associé au remplissage béton, après le durcissement de celui-ci.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.
Du point de vue de la forme géométrique, on distingue essentiellement deux types de profils :
- 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.
- the so-called "open" profile in which the omega profile has a generally trapezoidal or rectangular shape.
- the so-called "closed" profile in which the omega profile has a general dovetail shape.
Concernant les embossages, ils constituent des déformations localisées réalisées sur les surfaces planes du profilé lesdites déformations formant des emboutis notamment du type, bouton rond, bouton ovale, nervure transversale, crantage, chevron ou toute autre image.As regards the embossings, they 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.
Les embossages peuvent être réalisés sur les sommets du profilé, sur les semelles ainsi que sur les âmes de l'oméga. Les solutions existantes sont généralement basées sur un choix arbitraire de la forme géométrique des embossages, c'est-à-dire du motif de la déformation ainsi que de la répartition en surface desdits motifs, pouvant être répartis de différentes manières, en nombre, en géométrie, en densité. Le résultat ainsi obtenu est totalement aléatoire, c'est-à-dire qu'il ne conduit pas nécessairement à un compromis optimal entre des différents critères de performances du point de vue résistance des matériaux.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.
Il y a lieu de remarquer que les critères de performances peuvent être souvent contradictoires, dans le sens que l'amélioration d'un critère peut conduire à la dégradation d'un autre. Par exemple, les embossages placés sur les semelles ou bien trop près des angles semelles-âmes, améliorent souvent la collaboration avec le béton, mais conduisent à l'affaiblissement de la section efficace et par conséquent, à la perte de performances au coulage. D'autre part, les embossages en forme de crantage continu générant en section, une ondulation ou encore, des embossages insuffisamment inclinés et ou espacés, augmentent la résistance au poinçonnement des âmes sur les appuis, mais, en revanche, réduisent la section efficace et engendrent des contraintes internes parasites de compression dans les parties planes, en provoquant des instabilités locales telles que voilement, claquage prématuré.It should be noted that the performance criteria can often be contradictory, in the sense that the improvement of one criterion can lead to the degradation of another. For example, 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. On the other hand, 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.
Ainsi, US 3,397,497 décrit un élément de coffrage en acier profilé pour la réalisation d'un plancher à bacs métalliques collaborants réalisés avec du béton armé coulé dans le coffrage, l'élément présentant des âmes comprenant divers motifs emboutis de forme longiligne, disposés chacun, sur la diagonale d'un rectangle ayant un coté sensiblement égal à la largeur de l'âme, chaque rectangle incluant plus d'un motif embouti.
Dans un autre exemple, la diminution de la pente des âmes permet d'accroître la largeur utile du bac, mais, par contre, réduit l'efficacité de la collaboration entre la tôle et le béton.Thus, 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.
In another example, 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.
Le but de l'invention est de proposer un élément 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 conduisant lors de la réalisation du plancher, à un gain substantiel, du point de vue des performances en phase mixte, comparativement aux planchers existants du type profil ouvert, tout en restant compétitif au niveau des performances en phase de coulage ainsi qu'au niveau du poids surfacique de l'élément et du coffrage.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.
L'invention a pour objet un élément 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, 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, caractérisé en ce que la forme générale de chaque embouti, représentant un motif est incluse seule dans ledit rectangle.
Les autres caractéristiques de l'invention sont :
- la section de l'oméga est trapézoïdale,
- 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'emboîtement.
- l'élément profilé est galvanisé.
The other features of the invention are:
- the omega section is trapezoidal,
- the stampings define a number of patterns per linear meter depending on the width of the core and the inclination of the diagonals which is between 20 ° and 45 °.
- the stamped form protrudes from the side of the metal shuttering tanks.
- the stamped form a gutter.
- the flanges and the top comprise at least one longitudinal fold forming a stiffening groove and or interlocking.
- the profiled element is galvanized.
L'invention concerne également un plancher à bacs métalliques collaborants réalisés avec du béton pouvant être renforcé, coulé dans un coffrage constitué d'éléments dont 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.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.
La description qui suit et les figures annexées le tout donné à titre d'exemple non limitatif fera bien comprendre l'invention.The description which follows and the appended figures, all given by way of nonlimiting example, will make the invention clear.
Les figures 1a,1b, 1c présentent respectivement un plancher en coupe selon l'invention, une partie d'un élément en forme d'oméga, et un assemblage de deux ailes d'extrémité présentant un emboîtement de deux éléments.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.
Les figures 2a et 2b présentent un autre exemple de réalisation d'un élément selon l'invention.Figures 2a and 2b show another embodiment of an element according to the invention.
La figure 3 est un schéma de principe de la mesure des caractéristiques mécaniques d'un plancher à bacs métalliques collaborants.Figure 3 is a block diagram of the measurement of the mechanical characteristics of a floor with cooperating metal bins.
La figure 4 représente des courbes de caractéristiques mécaniques d'un plancher selon l'invention en comparaison avec les caractéristiques mécaniques d'un plancher de référence.FIG. 4 represents curves of mechanical characteristics of a floor according to the invention in comparison with the mechanical characteristics of a reference floor.
L'invention concerne, comme représenté sur les figures 1a, 1b, 1c, un élément 1 de coffrage 2 en tôle d'acier profilée, pouvant être galvanisé, pour la réalisation d'un plancher 3 à bacs métalliques 4 collaborants réalisés avec du béton armé 5 coulé dans ledit coffrage 2, l'élément 1 présentant un profil composé d'une succession de formes 7 en oméga, comprenant un sommet 8, de part et d'autre duquel s'étendent deux âmes 9 inclinées par rapport au plan du sommet 8, et deux semelles 10 sensiblement parallèles au plan général 11 du plancher 3, l'assemblage des éléments par les semelles d'extrémité générant des bacs métalliques 4 de coffrage 2. L'élément 1 comporte sur les âmes 9, des emboutis 12 longilignes, disposés chacun, sur la diagonale 13 d'un rectangle ayant un coté 14 sensiblement égal à la largeur de l'âme 9, la forme générale de chaque embouti 12, représentant un motif, étant incluse seule dans ledit rectangle.The invention relates, as shown in FIGS. 1a, 1b, 1c, to a
Les emboutis 12 définissent un nombre de motifs formant crantage inclinés de manière que la coupe transversale droite ne traverse qu'un seul motif, sur une distance très limitée ne conduisant pas, ainsi, à une perte significative de la résistance de la section. Le nombre des motifs par mètre linéaire est fonction de la largeur de l'âme et de l'inclinaison des diagonales comme représenté sur la figure 1b. De préférence le nombre de motifs est d'environ 25 par mètre linéaire de chaque âme en oméga du profilé.The
Les emboutis, dans l'exemple, en forme de gouttière sont en saillies du coté des bacs métalliques 4 de coffrage.The embossed, in the example, shaped gutter are projecting from the side of the
Sur la figure 1b, est représenté une forme 7 en oméga d'une partie de l'élément 1 de coffrage 2, la forme étant trapézoïdale, mais cette forme pourrait être aussi rectangulaire ou en queue d'aronde.In Figure 1b, there is shown an
II est représenté sur les figures 1b et 1c les semelles 10 et le sommet 8 d'une forme 7 en oméga sur lesquels est réalisé au moins un pli 15 longitudinal formant une rainure de raidissement et ou d'emboîtement dont le rôle est d'améliorer la résistance au voilement. L'emboîtement est matérialisé sur la figure 1c qui représente les ailes en extrémités de deux éléments 1 joints pour le montage d'un coffrage 2.1b and 1c show the
Les figures 2a et 2b donnent un autre exemple de réalisation de l'invention dans lequel les plis 15 des ailes sont réalisés près de l'angle âme-semelle de manière à permettre la fixation des connecteurs en creux d'ondes sur les poutres d'appui.FIGS. 2a and 2b show another embodiment of the invention in which the
Avec l'ensemble des caractéristiques de l'élément selon l'invention, qui concerne d'une part, la forme géométrique de la section de préférence en oméga et d'autre part la forme des embossages, leur disposition, espacement et inclinaison, on obtient un gain très significatif sur les performances mécaniques du plancher, de l'ordre de 70 à 100 %, par rapport aux planchers existants, tout en minimisant le poids du coffrage par unité de surface.With all the characteristics of the element according to the invention, which concerns on the one hand, 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.
On rappelle que l'objectif principal, lors des études sur un nouveau profil, était de mettre au point un plancher permettant d'améliorer les performances, aussi bien en phase de coulage qu'en mixte, en gardant de préférence sa forme trapézoïdale et en réduisant en même temps sa masse surfacique.It is recalled that the main objective, when studying a new profile, was to develop a floor to improve performance, both in the casting phase and mixed, preferably keeping its trapezoidal shape and in at the same time reducing its surface mass.
Dans ce but, des études de différentes formes du bac et du crantage ont été effectuées, dont les résultats sont présentés dans l'exemple de réalisation suivant.For this purpose, studies of different shapes of the tray and the notch were performed, the results of which are presented in the following example embodiment.
Des essais ont déterminé les paramètres de calcul de la dalle en phase mixte, par la méthode appelée « m » et « k », et utilisée pour l'analyse technique du plancher.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.
L'état limite de service selon la méthode « m » et « k » consiste à respecter une inégalité concernant la contrainte de cisaillement de glissement entre l'élément en tôle et le béton, la contrainte de l'effort sollicitant étant inférieure à la contrainte de l'effort résistant du plancher.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.
La détermination des paramètres « m » et « k » est réalisée sur travée isostatique en prenant en compte la valeur I de la portée d'une travée sur deux appuis simples.The determination of the parameters "m" and "k" is carried out on isostatic span taking into account the value I of the span of a span on two simple supports.
Le dispositif d'essais est représenté sur la figure 3 qui montre un schéma d'essais statiques, avec une disposition des charges et des instruments de mesures.The test device is shown in Figure 3 which shows a static test pattern, with a provision of the loads and measuring instruments.
Sur la figure 3, le plancher 3 sur deux appuis simples 16 est soumis à la sollicitation d'un vérin 17. Il est mesuré d'une part, la flèche de déformation du plancher au moyen d'un instrument de mesure 18 et d'autre part, une mesure du glissement entre élément 1 et béton 5 au moyen de deux dispositifs 19.In FIG. 3, the
La figure 4 présente un ensemble de courbes de comparaison de résistance de deux planchers, les courbes donnant des valeurs de résistance limite au glissement et en charge limite, d'une part, pour un plancher selon l'invention et d'autre part pour un plancher de comparaison, et cela en fonction de différentes portées représentées par la valeur 4Is.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 .
Dans le cas de distribution quelconque des charges telles que charges concentrées on doit prendre en compte une portée fictive équivalente I représentée par l'expression 4Is.In the case of any distribution of loads such as concentrated loads, an equivalent fictional range I represented by the expression 4I s must be taken into account.
Le plancher dit de comparaison est un plancher dont l'élément présente un profil composé d'une succession de formes trapézoïdales en oméga, comprenant un sommet, deux semelles sensiblement parallèles au plan général du plancher, l'assemblage des éléments par les semelles générant des bacs métalliques de coffrage, l'élément comportant sur les âmes, des emboutis longilignes, jointifs formant suivant une coupe longitudinale de l'âme, des ondulations.The so-called 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.
On remarque l'amélioration apportée par l'élément selon l'invention en terme de résistance à la charge en glissement, représentée par les courbes A et B respectivement pour un plancher selon l'invention et le plancher de comparaison, et en charge limite représentée par les courbes C et D respectivement pour un plancher selon l'invention et le plancher de comparaison.Note the improvement provided by the element according to the invention in terms of resistance to the sliding load, represented by the curves A and B respectively for a floor according to the invention and the comparison floor, and in limit load represented by curves C and D respectively for a floor according to the invention and the comparison floor.
Le tableau suivant présente, pour le plancher selon l'invention et le plancher de comparaison, le poids propre des dalles pour différentes épaisseurs desdites dalles.
Le gain sur les charges limites obtenu avec le plancher réalisé avec les éléments de l'invention est compris entre 70% et 100%, avec en plus, le poids de l'élément réduit de 3,5%, par rapport au plancher de comparaison. Pour la même surcharge, l'épaisseur nécessaire du plancher de comparaison est de l'ordre de 30% à 50% supérieure.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 . For the same overload, the necessary thickness of the comparison floor is of the order of 30% to 50% higher.
A cette constatation, il convient d'ajouter une remarque importante : il a été réalisé des planchers avec une épaisseur de 24 cm qui ont pleinement confirmé une très bonne tenue. Par conséquent, l'élément selon l'invention peut assurer la réalisation de planchers atteignant une épaisseur totale, avec extension, de 28 cm.To this observation, it is necessary to add an important remark: it was realized floors with a thickness of 24 cm which fully confirmed a very good behavior. Therefore, the element according to the invention can ensure the realization of floors reaching a total thickness, with extension, of 28 cm.
Claims (8)
- Element (1) of shuttering (2) made of sectional sheet-steel for the construction of a floor (3) with cooperating metal troughs (4), made of cast reinforced concrete (5) in the said shuttering (2), the element (1) having a profile composed of a succession of omega shapes (7), each shape (7) including a top flange (8) on both sides of which extend two webs (9) inclined with respect to the plane of the top flange (8), and two bottom flanges (10) essentially parallel to the overall plane (11) of the floor (3), the assembling of the elements via the end bottom flanges creating metal troughs (4) of the shuttering (2), the element (1) comprises, on the webs (9), longilineal pressings (12), each lying along the diagonal of a rectangle with one side approximately equal to the width of the web (9), characterized in that the general shape of each pressing (12), representing a motif, is alone included in the said rectangle.
- Element (1) according to Claim 1, characterized in that the cross section of the omega is trapezoidal.
- Element (1) according to Claim 1, characterized in that the pressings (12) define a number of motifs per linear metre, depending on the width of the web (9) and the inclination of the diagonals, which lies between 20° and 45°.
- Element (1) according to Claim 1, characterized in that the pressing (12) forms a projection on the side of the metal troughs (4) of the shuttering (2).
- Element (1) according to Claim 1, characterized in that the pressing (12) forms a channel.
- Element (1) according to Claim 1, characterized in that the bottom flanges (10) and the top flange (8) comprise at least one longitudinal fold forming a stiffening and/or interlocking groove.
- Element (1) according to Claim 1, characterized in that the sectional element is galvanized.
- Floor (3) with cooperating metal troughs (4), made of concrete (5), which may be reinforced, poured into shuttering (2) made of elements (1) according to Claims 1 to 7, characterized in that at least one element (1) of the shuttering (2) comprises, on the webs (9), longilineal pressings (12), each lying along the diagonal of a rectangle with one side approximately equal to the width of the web (9), the general shape of each pressing (12), representing a motif, being alone included in the said rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CY20071100424T CY1108615T1 (en) | 2000-03-29 | 2007-03-27 | STEEL CONSTRUCTION OF STEEL LAYER FORMED FOR CONSTRUCTION OF A FLOOR WITH COLLABORATING METAL CUTS |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0003960A FR2807081B1 (en) | 2000-03-29 | 2000-03-29 | FORMING ELEMENT IN PROFILED STEEL SHEET FOR THE PRODUCTION OF A FLOOR WITH COLLABORATING METAL BINS |
| FR0003960 | 2000-03-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1156171A1 EP1156171A1 (en) | 2001-11-21 |
| EP1156171B1 true EP1156171B1 (en) | 2006-12-27 |
Family
ID=8848606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01400776A Expired - Lifetime EP1156171B1 (en) | 2000-03-29 | 2001-03-27 | Shuttering element made of profiled steel sheet for the construction of floors with collaborative metal form-slabs |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1156171B1 (en) |
| AT (1) | ATE349582T1 (en) |
| CY (1) | CY1108615T1 (en) |
| DE (1) | DE60125457T2 (en) |
| DK (1) | DK1156171T3 (en) |
| ES (1) | ES2275633T3 (en) |
| FR (1) | FR2807081B1 (en) |
| PL (1) | PL208701B1 (en) |
| PT (1) | PT1156171E (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SI22495A (en) * | 2007-03-10 | 2008-10-31 | Trimo D.D. | High-profile sheet metal for scarf joined ceilings |
| ES2344389B2 (en) | 2008-06-16 | 2011-06-02 | Universitat Politècnica De Catalunya | SYSTEM FOR CONNECTION BETWEEN STEEL SHEET AND CONCRETE. |
Family Cites Families (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/en not_active Expired - Lifetime
-
2001
- 2001-03-27 DK DK01400776T patent/DK1156171T3/en active
- 2001-03-27 ES ES01400776T patent/ES2275633T3/en not_active Expired - Lifetime
- 2001-03-27 PT PT01400776T patent/PT1156171E/en unknown
- 2001-03-27 AT AT01400776T patent/ATE349582T1/en active
- 2001-03-27 DE DE60125457T patent/DE60125457T2/en not_active Expired - Lifetime
- 2001-03-27 EP EP01400776A patent/EP1156171B1/en not_active Expired - Lifetime
- 2001-03-29 PL PL346789A patent/PL208701B1/en unknown
-
2007
- 2007-03-27 CY CY20071100424T patent/CY1108615T1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DK1156171T3 (en) | 2007-03-19 |
| FR2807081A1 (en) | 2001-10-05 |
| EP1156171A1 (en) | 2001-11-21 |
| ES2275633T3 (en) | 2007-06-16 |
| CY1108615T1 (en) | 2014-04-09 |
| DE60125457T2 (en) | 2007-09-27 |
| PL208701B1 (en) | 2011-05-31 |
| PT1156171E (en) | 2007-02-28 |
| ATE349582T1 (en) | 2007-01-15 |
| DE60125457D1 (en) | 2007-02-08 |
| FR2807081B1 (en) | 2002-09-13 |
| PL346789A1 (en) | 2001-10-08 |
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