EP0654109A1 - Coffrage collaborant a aretes connectees - Google Patents
Coffrage collaborant a aretes connecteesInfo
- Publication number
- EP0654109A1 EP0654109A1 EP94915582A EP94915582A EP0654109A1 EP 0654109 A1 EP0654109 A1 EP 0654109A1 EP 94915582 A EP94915582 A EP 94915582A EP 94915582 A EP94915582 A EP 94915582A EP 0654109 A1 EP0654109 A1 EP 0654109A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- formwork
- deformations
- formwork according
- profile
- edges
- 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
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
- the present invention relates to a ribbed metal profile and more especially to such a profile used as formwork for the construction of steel / concrete collaborating floors.
- Profiled steel sheets are known for serving as formwork for concrete floors. These sheets thus profiled or in other words ribbed are semi rigid; they have lengths which make it possible to cover one or more successive spans of floors and to take sufficient support on the permanent supports present at the ends. They remain in place on the underside of the floors after removing any props.
- formwork in profiled sheets lost formwork which does not participate in the resistance in service of the floor and collaborating formwork which plays a role of reinforcement of the floor and which therefore collect forces when stresses in a straight section of the floor tend to cause relative sliding between the concrete and the formwork.
- lost forms have only rectilinear ribs in the direction of their length, arranged in such a way that demoulding of the concrete without deformation of said forms would be possible.
- the slip is not adversely affected, the slip shear rate is zero and there is no participation of the formwork in the service resistance of the floor.
- the collaborating forms should not be able to be removed from the mold.
- different types of collaborating formwork smooth reworking collaborating formwork, reworking collaborating formwork with embossing, open collaborating formwork with embossing.
- the generators or ribs are rectilinear, but these ribs are arranged so as to form dovetails which prevent demoulding. Demoulding is certainly impossible, but no obstacle prevents the concrete from sliding relative to the formwork in the longitudinal direction of the formwork. Such smooth collaborating formwork is therefore not very efficient.
- the embossing of the formwork When the floor is subjected to bending, the embossing of the formwork is requested; they resist sliding concrete / formwork and to disengage from concrete, deform the director (the director is the straight section of the formwork).
- the director is the straight section of the formwork.
- the so-called open and embossed There is yet another kind of collaborating formwork, the so-called open and embossed.
- the generators are similar to those of lost formwork, but the cores have embossments. As soon as a relative slip of concrete / formwork appears, the embossments constitute obstacles which resist inducing as previously deformations of the director.
- the stamping can nevertheless concern only limited depths which do not allow a marked stop effect.
- the present invention aims to provide collaborating metal forms capable of meeting current demand and which therefore perform better than current forms, in particular by opposing sheet metal / concrete sliding better.
- the present invention proposes for this purpose a metallic rib formwork for the construction of steel / concrete collaborating floors using other modes of deformation of the formwork profile capable of developing more resistance for less amounts of sliding.
- the rib metal formwork according to the invention having a cross section with polygonal ribs also has localized, reentrant deformations in the ridges of ribs.
- reentrant is meant a deformation obtained by repelling the metal in such a way that this deformed zone is not demouldable.
- these localized deformations are carried out simultaneously on two opposite edges of the formwork, namely two edges of the same type, that is to say at the limit of the same range. More preferably, these deformations on two opposite edges are staggered.
- the formwork according to the invention further comprises means which reinforce the stiffening of its beaches and / or of its cores and / or increase its capacity to collaborate with the concrete, these means taken separately or in combination belonging to the group next: transverse bulging, transverse or oblique ribbing, embossments, punctures, longitudinal ribbing, stiffeners.
- the deformations according to the invention which are of shapes such that the profile is not demouldable, are also used for attachment.
- the invention also provides equipment for the manufacture of formwork according to the invention as well as particular applications of said formwork.
- Fig 1 a formwork according to the invention
- fig 1A in a perspective view
- fig 1B in a sectional view along the line gg of fig 1A
- Fig 2 a section through a floor associated with a formwork according to the invention.
- Fig 3 a section of the floor along line i-i in fig 2.
- Fig 4 a section of the floor along line j-j of fig 2.
- Fig 5 a method of attachment to the formwork according to the invention.
- Fig 6 another method of attachment to the formwork according to the invention.
- Fig 7 a tooth of a toothed wheel of a machine carrying out the deformations according to the invention on a rib formwork.
- the invention relates to a formwork for the construction of steel / concrete collaborating floors but it is understood that the word concrete will be taken later and in particular in the claims with a broad meaning encompassing all the binders capable of entering into the composition of floors.
- Fig 1 shows a portion of formwork rib 1 according to the invention.
- This formwork is a profile with longitudinal edges 2, 3 delimiting between them zones called areas such as 4, 5 when they are parallel to the support plane of the floor, called webs such as 6 when they are vertical or oblique and connect the beaches.
- this profile is provided with localized deformations such as 7 made in the edges 2, 3 and having a re-entrant profile as more particularly visible in FIG. 1 B.
- the depth of the deformation 7 is greater in the center than on its edges.
- the length "AB" of the arcs and segments constituting the final edge, at the location of the deformation 7, can be unchanged from its initial value, thus causing no elongation and therefore no thinning or fracturing of the metal.
- Figures 2, 3 and 4 show the profile 1 according to the invention associated with a concrete floor 10.
- the ranges 4 and 5 there are the ranges 4 and 5, a high range 4 and a low range 5, cores such as 6, and localized deformations 7i, two deformations 7a and 7b on the high edges 2 and two deformations 7c and 7d on the lower edges 3.
- the concrete 10 envelops the high areas such as 4 and the longitudinal edges such as 2 which border them.
- Each deformation such as 7 in the high edges such as 2 is filled with a protuberance 11 of concrete which constitutes a stop producing an oblique feedback directed along the arrow "p" in the event of stress on the floor.
- the deformations 7 of the high edges 2 then produce two types of mechanisms which appear more clearly in FIGS. 3 and 4 which are sections respectively in a high range 4 at the level of two deformations 7, and in a low range 5 at the level of two deformation vertices 7.
- the concrete 10 occupies the interior volume of the re-entrant angles of the edges, with narrowed sections such as 13 framed by wider sections such as 14, this set acting as a lock at the location of the deformations 7.
- the re-entrant deformations 7 of the profile 1 should be repo ⁇ ssed, but all these forces exerted by the concrete at the deformation level 7 will have to accumulate up to reach the plasticizing force in transverse traction of the sheet in front of the deformations 7 combined with a localized crushing of the projecting edges of the concrete.
- the sliding resistance is greatly improved if deformations are also practiced in the facing edge limiting the high and / or low range on its other side.
- FIG. 2 the deformations 7 on an edge are staggered with the deformations 7 of the edge opposite the other side of the range to distribute the contribution of the deformations 7 along the formwork, the forces are then balanced by oblique paths.
- the shapes of the deformations 7 are such that the formwork is not demoulded, this being obtained at the level of the deformations 7 by a new edge referenced "c" in FIG. 1B less shrinkage from the original profile as the top of the deformation. This can also be expressed by an angle " ⁇ " greater than 90 ° as already said.
- the deformations 7 practiced in the edges have progressively increasing depths from their edges a to their middle to create a wedge effect in the constriction 12b which involves a substantial length of concrete and metal in abutment with respect to each other so as to involve the resistance in lateral compression of the whole length gradually deformed.
- the deformations 7 practiced according to the invention cause little or no nominal elongation of the average fiber of the metal;
- the thickness of the sheet is preserved and the variations in shape of the profile are progressive, which avoids the often observed degradation of the mechanical performance of the profile already even in the concrete casting phase.
- the deformations according to the invention being practiced in the regions of edges more rigid than the cores or the beaches, on the one hand the efficiency of the connection of the profile is not compromised by the malleability, the flexibility or the deformability in own bending of said areas or cores, on the other hand they allow the production of additional embossments or complementary means in general in said areas or cores favoring the collaboration of the profile with the concrete and / or increasing the resistance of the profile.
- these deformations 7 can be used to serve as attachment bases, since they have a so-called “non-moldable” shape as explained above. Two methods of attachment are thus illustrated in FIGS. 5 and 6.
- the systems are of the lug type 16 (fig 5) engaged in the profile, pushed against the high surface 4 and blocked by the top 17 of the deformation 7 or of the claw type 18 (fig 6) to attach to the deformations in the lower part by jamming in the deformation bottoms 7.
- the invention thus creates means for locking non-traversing fixing devices for ceilings, technical equipment, distribution of fluids or even for simple fixing of the formwork before pouring concrete, for attachment of spreading means.
- the deformations according to the invention are carried out after formation in the sheet metal of the edges of the main ribs of the profile 1 by a machine with modified profiling cage equipped with a conventional shaft not shown, this shaft being the carrier of smooth rollers 19 (fig 7) placing on one side of the profile 1 and on the other side a series of toothed wheels 20 whose axes are inclined relative to the mean plane of the profile circulating in the cage.
- Each smooth roller 19 provides support for the sheet 1 along two contact lines located inside a re-entrant angle of the profile on either side of the edge in the vicinity of which the deformations 7 must be produced.
- a clear shoulder allows the formation of deformations under the effect of the teeth 20 of the associated toothed wheel.
- a toothed wheel in relation to a smooth roller achieves successive deformations on an edge of the profile.
- the pitch of the teeth 20 on the wheel measures the pitch of the deformations to be carried out.
- the developed length of a tooth measures the length of the apex of the deformation to be achieved.
- the metal clearance of the toothed wheel between the teeth is sufficient to avoid contact between the toothed wheel and the edge of the profile resulting from the profiling.
- the diametral plane of a toothed wheel is substantially perpendicular to the bisector plane of the mean angle formed on the one hand by the core of the profile in the vicinity of the edge before the deformation is formed and on the other hand by the facet of the deformation ensuring the transition between the top of the deformation and the preserved central zone of the core.
- the active tooth 20 comes into contact with the sheet 1 and shifts the metal towards the inside of the re-entrant angle of the edge between the points of contact of the sheet with the fillets angles of the smooth roller 19.
- the edge leave of the sheet rolls around a mobile center. It lifts up to allow the sheet metal in contact with the tooth 20 to straighten up then folds down, recalled by the sheet metal 1 which draws a lace outline.
- Certain sheet metal fibers are stretched longitudinally by the action of the teeth 20.
- the invention relates to new profiles with deformations 7 but it also relates to profiles with deformations 7 obtained from profiles initially intended for lost or collaborating current formwork open or re-entrant then modified to make them with connected edges according to the invention.
- manufacture of the profiles according to the invention can be done online or in recovery.
- the profiles according to the invention can also be used as means for attaching various panels, in particular insulation panels, for example with an organic foam core.
- the invention has described deformations 7 made in the edges of the profiles. It is interesting that the deformations act on the fillet of the edges because this makes it possible not or practically not to stretch the metal to carry out the deformations 7, to mobilize the pressures "p" without introducing a tendency for the separation of the cores or of the ranges relative to to the concrete and to transmit the pressures "p" directly to the pads, while maintaining practically the entire width of the pads for better resistance of the profile to bending.
- T the thickness of the sheet
- any deformation which involves during the work of the floor the compressive strength or the transverse tensile strength of the areas beyond the possible bending of the webs belongs to the invention.
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)
- Bridges Or Land Bridges (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9305349A FR2704885B1 (fr) | 1993-05-05 | 1993-05-05 | Coffrage collaborant a aretes connectees. |
FR9305349 | 1993-05-05 | ||
PCT/FR1994/000512 WO1994025699A1 (fr) | 1993-05-05 | 1994-05-03 | Coffrage collaborant a aretes connectees |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0654109A1 true EP0654109A1 (fr) | 1995-05-24 |
EP0654109B1 EP0654109B1 (fr) | 1999-01-13 |
Family
ID=9446773
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94915582A Expired - Lifetime EP0654109B1 (fr) | 1993-05-05 | 1994-05-03 | Coffrage collaborant a aretes connectees |
Country Status (6)
Country | Link |
---|---|
US (1) | US5809721A (fr) |
EP (1) | EP0654109B1 (fr) |
DE (1) | DE69415933T2 (fr) |
ES (1) | ES2127394T3 (fr) |
FR (1) | FR2704885B1 (fr) |
WO (1) | WO1994025699A1 (fr) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29501807U1 (de) * | 1995-02-04 | 1996-05-30 | Dyckerhoff & Widmann AG, 81902 München | Als verlorene Schalung ausgebildetes selbsttragendes Bewehrungselement für ein Stahl-Beton-Verbundbauteil |
BR9706190A (pt) * | 1997-10-24 | 1999-06-08 | Encarnacao Fernando Antonio Da | Bloco virtual para lajes pré-moldadas |
US6698710B1 (en) | 2000-12-20 | 2004-03-02 | Portland Cement Association | System for the construction of insulated concrete structures using vertical planks and tie rails |
AUPR730101A0 (en) * | 2001-08-27 | 2001-09-20 | Metal Forming Technologies Pty Ltd | Profiled metal sheet |
GB2397074B (en) * | 2003-01-07 | 2006-10-11 | Corus Uk Ltd | Profiled steel decking |
CN100467732C (zh) * | 2003-02-26 | 2009-03-11 | 邱则有 | 一种现浇钢筋砼空心楼盖用薄壁管 |
CN100400764C (zh) * | 2003-08-04 | 2008-07-09 | 邱则有 | 一种现浇砼用空腔模壳构件 |
CN100501057C (zh) * | 2003-09-15 | 2009-06-17 | 邱则有 | 一种现浇砼用轻质胎模构件 |
CN100424294C (zh) * | 2003-10-01 | 2008-10-08 | 邱则有 | 一种模壳构件 |
ES2597457T3 (es) | 2007-02-15 | 2017-01-18 | D'anglade, Pierre-Michel | Encofrado reciclable para formar una estructura de hormigón |
US8313080B2 (en) * | 2007-02-15 | 2012-11-20 | Abzac Canada Inc. | Retaining device for assembling two panels, recyclable formwork for forming a concrete structure and packaging assembly using the same |
CA3130352C (fr) * | 2020-09-10 | 2024-01-02 | California Expanded Metal Products Company | Bouchon de flute |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1315913A (fr) * | 1961-12-14 | 1963-01-25 | Hourdis | |
FR1346013A (fr) * | 1963-01-28 | 1963-12-13 | Inland Steel Products Company | Forme métallique permanente pour la coulée de planchers et combles en béton armé, et structure composite comprenant cette forme remplie de béton durci |
FR87173E (fr) * | 1965-01-13 | 1966-06-24 | Solvay | Panneaux nervurés et leur mise en oeuvre |
FR1452355A (fr) * | 1965-10-21 | 1966-02-25 | élément de construction | |
NL147819B (nl) * | 1970-09-04 | 1975-11-17 | Hollandse Bouwcombinatie Holla | Geprofileerde vloerplaat, alsmede hierin gestorte betonvloer. |
FR2221601A1 (en) * | 1973-03-12 | 1974-10-11 | Thelle Ingenierie Const Metal | Reinforced concrete floor with shuttering - has shuttering in form of troughs of joined corrugated metal sheets |
GB1488681A (en) * | 1974-12-16 | 1977-10-12 | Redpath Dorman Long Ltd | Composite decks |
CH629560A5 (en) * | 1977-03-25 | 1982-04-30 | Hoesch Werke Ag | Profiled metal sheet for the reinforcement of a concrete composite floor |
US4876837A (en) * | 1988-08-22 | 1989-10-31 | Usg Interiors, Inc. | Corner bead structure |
-
1993
- 1993-05-05 FR FR9305349A patent/FR2704885B1/fr not_active Expired - Lifetime
-
1994
- 1994-05-03 EP EP94915582A patent/EP0654109B1/fr not_active Expired - Lifetime
- 1994-05-03 DE DE69415933T patent/DE69415933T2/de not_active Expired - Lifetime
- 1994-05-03 WO PCT/FR1994/000512 patent/WO1994025699A1/fr active IP Right Grant
- 1994-05-03 ES ES94915582T patent/ES2127394T3/es not_active Expired - Lifetime
-
1995
- 1995-04-03 US US08/415,625 patent/US5809721A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9425699A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1994025699A1 (fr) | 1994-11-10 |
FR2704885A1 (fr) | 1994-11-10 |
FR2704885B1 (fr) | 1995-06-09 |
EP0654109B1 (fr) | 1999-01-13 |
DE69415933D1 (de) | 1999-02-25 |
ES2127394T3 (es) | 1999-04-16 |
US5809721A (en) | 1998-09-22 |
DE69415933T2 (de) | 1999-06-10 |
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