PREFABRICATED MIXED FRAME CHARACTERIZED BY A TURNOVER CONSTRUCTION.

Abstract

La présente invention concerne un dispositif d'ossature mixte du type décrit dans le brevet principal ndegré 8903067 du 6 mars 1989. Le présent additif à l'invention concerne un dispositif de connexion un procédé de réalisation de ce dernier, des domaines d'application. La figure 1 représente le dispositif qui selon l'invention permet d'éliminer toute opération de soudage du connecteur puisque ce dernier est obtenu directement dans la masse du profilé. Profilé et connexion forment un seul élément. La connexion est réalisée dans la partie noyée du profilé et est assurée par des saillies dont la géométrie et l'orientation permet de s'opposer aux effets de glissement et de soulèvement de la dalle béton par rapport au profilé, sans addition d'autres éléments étrangers au profilé.

Description

The present invention relates to a mixed frame device of the type described in main patent no. 8903067 of March 6, 1989. This addendum to the invention relates to a connection device, a method for making the latter, and areas of application. Figure 1 shows the device. Figures 2 to 9 show several types of devices. Figure 10 shows an open profile. Until now the connection between the profile (1) and the concrete slab (2) was ensured by an added connector, most often fixed by welding. The device according to the invention eliminates the need for welding the connector, since the connector is formed directly from the profile itself. The profile and the connection form a single element. The connection is made in the embedded part of the profile and is ensured by projections whose geometry and orientation make it possible to oppose the effects of sliding and lifting of the concrete slab relative to the profile, without the addition of other elements foreign to the profile. The device allows for the rational and controlled distribution of mechanical stresses so as not to exceed the permissible values ​​of each material. On the same profile, one or more projection geometries can be considered, thus allowing one to respond exactly to the local stresses that a connector must balance. We know in particular that the stresses that the connector must balance are maximum in the end zones and minimum in the middle of the span, the geometry of the connectors of the same profile can then vary along the profile according to the distribution of the force or be constant in the interest of standardization, simplification of calculations and implementation. The connecting function can then be rationally ensured. The present invention allows for an infinite number of construction cases authorized by the direction of pouring. The spacing of the profiles is adjustable, the distance between the profile and the bottom of the formwork is adjustable, the thickness of the slab is adjustable. Two profiles define a space in which the thickness of the slab can be identical or different from neighboring spaces due to the rheological characteristics of the fresh concrete and the pressure loss caused by the free space between the profile and the bottom of the mold. The device can then mechanically respond exactly and rationally to the mechanical forces caused by external and internal actions. The profile can be as rolled, figures 2,4. The profile can be obtained from the cutting of another profile figures 3, 5, 6, 7. The cutting can be straight and continuous, parallel to the longitudinal axis of the profile, it can also be ordered to form crenellations and steps, the latter constituting the projections after twisting. The profile can be reconstituted by welding without the connector being welded; the profile can be formed from a thin open or closed profile obtained by forming a thin plate, for example of stainless steel, as shown in Figure 9. A stiffening material, for example polyurethane, which may include longitudinal reinforcements, can be housed inside the thin profile. The present invention makes it possible to consider the use of several materials or constituent elements, for example, of the slab (2). These materials can be prefabricated and placed at the bottom of the formwork, for example: ceramic tiles, precast concrete slabs, road carpet, floor covering. Prefabricated elements can then fulfill the functions of formwork, wear layer, thermal and acoustic insulation, sealing, cleanliness, and aesthetics. The connection execution process involves first making cuts using plasma, oxyfuel, laser, waterjet, punching, or shearing; some cuts may be wide enough to allow the passage of reinforcement. The projections at their base have a width that ensures mechanical resistance in service, minimizing deformation energy through torsion by means of a torque defined by two opposing forces of equal magnitude, whose respective points of application are located on two successive projections. The device according to the invention can be used, after the concrete has hardened, as successive elements supported on foundation beams or as roadway elements directly supported on a subgrade by partial or complete support of the profiles. The lightweight nature of the composite construction allows for elements with a surface area of ​​several square meters. The easily manageable pouring direction allows for formwork of the roadway surface, thus meeting safety and aesthetic requirements. The composite construction creates a space between the ground and the concrete that can be used for the passage of utilities. The materials of the device, namely steel for the profile and concrete for the slab, can be replaced by other materials respectively aluminium, wood, reinforced or prestressed concrete beams, composite, for the profile and high-performance concrete, fibre concrete, organic matter, composite for the slab.

Claims

DEMANDS 1. Device according to any one of the claims of the main patent characterized in that the connection is obtained in the mass of the profile. Profile and connection form a single element without welding or assembly.

2. Device according to claim 1 characterized in that the connection between the profile (1) and the slab (2) is ensured by projections formed in the profile from straight or curved cuts in the mass or the surface of the profile, preferably the projections are made by twisting around one or more axes. The projections are branched out in a tree-like fashion, thus forming petals.

3. Device according to any one of the preceding claims characterized in that the profile is as rolled.

4. Device according to any one of the preceding claims characterized in that the profile comes from the cutting of another profile, the cutting forms crenellations and steps, the steps after twisting form a projection.

5. Device according to any one of the preceding claims characterized in that the profile is reconstituted welded.

6. Device according to any one of the preceding claims characterized in that the profile is a thin open or closed profile injected or not with a stiffening material which may include longitudinal reinforcements.

7. Device according to any one of the preceding claims characterized in that the concrete slab can include several materials, some of which are prefabricated and preferably placed at the bottom of the mold.

8. Device according to any one of the preceding claims characterized in that the formwork is an integral part of the slab, the formwork is for example made up of a prefabricated concrete slab including traditional reinforcements connecting the prefabricated part to the part cast in place.

9. A device according to any one of the preceding claims, characterized in that the steel can be replaced by any other material, such as aluminum, wood, composite, reinforced or prestressed concrete beam. The concrete can be replaced by any other material, such as high-performance concrete, fiber-reinforced concrete, composite, or organic matter.

10. A method according to any one of the preceding claims characterized in that the projections can be obtained successively or simultaneously in pairs after cutting, by plasma, oxy-fuel cutting, laser or water under pressure or punch, grooves some of which will allow the passage of passive steel of reinforced concrete and application of a torsional couple defined by two parallel forces, of the same intensity, of opposite direction and whose respective points of application are located on each projection.

11. Device according to any one of the preceding claims characterized in that the fields of application are bridge decks, industrial or building floors, vertical structures, roofing elements, pavement elements resting on stringers or directly on a subgrade layer.