EP3705657A1 - Structure de renfort textile pour un composant, procédé de fabrication pour une structure de renfort, composant et pièce semi-finie - Google Patents

Structure de renfort textile pour un composant, procédé de fabrication pour une structure de renfort, composant et pièce semi-finie Download PDF

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Publication number
EP3705657A1
EP3705657A1 EP20161189.4A EP20161189A EP3705657A1 EP 3705657 A1 EP3705657 A1 EP 3705657A1 EP 20161189 A EP20161189 A EP 20161189A EP 3705657 A1 EP3705657 A1 EP 3705657A1
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EP
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Prior art keywords
reinforcement structure
reinforcement
component
concrete
cross
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EP20161189.4A
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German (de)
English (en)
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EP3705657B1 (fr
Inventor
Manfred Curbach
Klaus Raps
Alexander Schumann
Elisabeth SCHÜTZE
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Carbocon GmbH
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Carbocon GmbH
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Priority claimed from DE102019105493.1A external-priority patent/DE102019105493A1/de
Application filed by Carbocon GmbH filed Critical Carbocon GmbH
Publication of EP3705657A1 publication Critical patent/EP3705657A1/fr
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal

Definitions

  • the invention relates to a textile reinforcement structure for a component, the component comprising a second matrix material, the reinforcement structure having at least one wall which comprises openings and is open-meshed from textile fibers which are held in an essentially rigid form by a first matrix material , and wherein the reinforcement structure has a closed cross-section perpendicular to a center of gravity axis with at least one cavity in the interior, wherein the clear size of the openings enables penetration of the wall with the second matrix material so that it can get into the cavity of the reinforcement structure.
  • An open-mesh structure is characterized by openings that are designed like a network and are sufficiently large for the intended purpose.
  • the minimum size of the mesh is determined by the granulometric properties of the second matrix material which, when the textile reinforcement structure is used as intended, can penetrate the second matrix material unhindered.
  • the composite material reinforced concrete is currently the most widely used building material worldwide. Unique structures are and were built with this in the past. However, the material has a serious disadvantage.
  • the reinforcing steel which absorbs the tensile forces occurring in the composite material, must be surrounded by a layer of concrete several centimeters thick so that the steel does not corrode. Despite this protective layer, which is several centimeters thick, damage to reinforced concrete structures occurred again and again due to the corrosion of the reinforcement.
  • a reinforcement element which is constructed as a bar and is essentially effective in one dimension.
  • the rod has filaments embedded in a matrix material.
  • the filaments are aligned in a pulling direction and are essentially completely surrounded by a mineral matrix material.
  • Fine concrete or a suspension with fine cement is provided as the matrix material.
  • Non-woven fabrics transfer the forces to the concrete via adhesion or friction.
  • the power transmission takes place mainly through adhesion and friction.
  • the scrims are, for example, deflected or folded over or brought into the shape of a loop.
  • a laying device is provided in which a positioning device or a laying robot is arranged to be movable at least two-dimensionally relative to a yarn dispensing device.
  • the laying device is designed to form a tensioning structure from yarn free of polymeric binders within a base frame.
  • the base frame has yarn holding devices in the area of outer edges of the base frame and / or recesses, the yarn holding devices at the same time forming deflection points for the yarn.
  • rods for example carbon rods
  • carbon rods in order to improve the bond, analogous to the reinforcement steel, attempts are made to ensure a sufficient bond through suitable surface profiling.
  • Various concepts are being pursued to achieve a composite load-bearing capacity, since a rib structure, which is common with steel reinforcement elements, would not be feasible or inefficient due to the anisotropy of the carbon fibers. Therefore, carbon rods are provided, for example, with an additional layer of sand, whereby the adhesive and friction bond can be improved compared to a smooth carbon rod.
  • carbon rods are the application of a subsequent rib structure, for example made of synthetic resin, the subsequent wrapping of individual fiber strands (slack or tight), shape variation of the carbon rods in the manufacturing process to improve the bond (e.g. making a rod in the form of a helix) or subsequent milling for making recesses as negative ribs.
  • a subsequent rib structure for example made of synthetic resin
  • shape variation of the carbon rods in the manufacturing process to improve the bond e.g. making a rod in the form of a helix
  • subsequent milling for making recesses as negative ribs e.g. making a rod in the form of a helix
  • the measures to improve the bond with carbon rods are also applied subsequently, which in turn can extend manufacturing and production times and lead to additional costs.
  • state-of-the-art carbon rods are manufactured in a pultrusion process and then profiling is applied, for example by milling, at least in a further production step.
  • profiling is applied, for example by milling, at least in a further production step.
  • valuable resources are also wasted due to the milling of the profile in the carbon rod.
  • the solution from the publication DE 10 2012 101 498 A1 also provides a textile grid through which the matrix material can easily penetrate.
  • it is also intended to bring the textile grid, which is initially manufactured as a flat structure, into a U-shape and thus obtain a discrete reinforcement element.
  • the open U-shape has a lower rigidity than closed cross-sectional shapes.
  • the pamphlet WO 98/09 042 A1 shows a textile reinforcement structure 21, 25, 37, 41 (cf. claims 1, 2, 7-12, 14-17, 19-21; page 8, 2nd paragraph to page 12, 4th paragraph; Figures 4 to 7e ).
  • This comprises a first matrix material (claim 20; p. 12, 4th paragraph) and is provided for a component (claim 1), this comprising a second matrix material (claim 14).
  • the reinforcement structure 21, 25, 37, 41 has at least one open-mesh wall ( Figures 4, 5, 6a, 7a ), which allows penetration of the wall with the second matrix material so that it can get into the interior of the reinforcement structure (claim 1, p. 8, 1st paragraph).
  • the reinforcement structure has a closed cross section perpendicular to a first main direction, a center of gravity axis (claims 7 and 9, Figures 4 - 7e ).
  • the course of the proposed reinforcement structure 21, 25, 37, 41 is basically linear.
  • An adjustment to the specific stress curves within a component is not provided. Since basically only a reinforcement with a circular cross-section running uniformly over the edge area of the component is provided, this can only form a reinforcement designed specifically for the load in a few selected special cases.
  • the pamphlet DE 20 2005 019 077 U1 also describes a reinforcement structure ( Figures 1, 2 , 7 to 9 ; Claims 1 to 6, 10 to 13, 15 to 18 and paragraph [0021]), but without providing a textile design.
  • a reinforcement structure Figures 1, 2 , 7 to 9 ; Claims 1 to 6, 10 to 13, 15 to 18 and paragraph [0021]
  • Such a structure based on rigid rods is difficult to manufacture.
  • finished rods with a defined length have to be bent afterwards and only then can be connected to form a closed structure.
  • the proposed reinforcement grid is a flexible textile fabric that has to be brought into the desired shape in an additional subsequent production step and, due to a lack of inherent rigidity, cannot remain in this shape without additional fasteners or concrete matrix.
  • the object of the present invention is therefore to provide a textile reinforcement structure, which is designed as a three-dimensional structure with open-meshed walls, an improved bond with the matrix material, improved rigidity and a load-appropriate design for adaptation to the specific stress profiles within a component to be reinforced later to offer.
  • the task is solved by a textile reinforcement structure for a component.
  • the component comprises a second matrix material, in particular concrete.
  • the reinforcement structure has at least one wall made of textile fibers, for example present in the form of fiber strands, open-meshed, for example in the manner of a network with openings delimited by webs.
  • the wall is built up using a textile-technical process, preferably by winding or braiding.
  • the wall or the textile fibers forming it are held in an essentially rigid form by a first matrix material, for example epoxy resin.
  • the reinforcement structure forms a closed cross section perpendicular to a center of gravity axis.
  • the center of gravity axis runs in the direction of a longitudinal extension of the reinforcement structure on the centroid of the area of the cross section and is defined in more detail below.
  • the clear size of the openings in the wall enables the second matrix material and the particles contained therein to penetrate the wall.
  • the clear size of the openings is preferably at least 1.5 to 2 times the largest particles of the second matrix material.
  • the aggregates of the second matrix material, in particular the concrete define the size of the particles contained.
  • the definition of the minimum size of the openings in the open-mesh reinforcement structure to 1.5 to 2 times the maximum particle size of the second matrix material differs from the previously known definition, which is common in the field of reinforced concrete.For a largest grain> 16 mm, the following applies: Largest grain + 5 mm, for For smaller largest grains, no grain-dependent definition is made.
  • the inventive The specification is thus far above the known solutions, in particular the regulations z. B. in reinforced concrete construction.
  • the grid openings in the wall made of textile fibers are therefore generally larger than required in reinforced concrete because of the largest grain size. On the one hand, this takes into account the fact that other, significantly more fine-grained matrix materials can also be used, for which a sufficient penetration capacity must also be ensured. This is done by a relatively larger definition of the grid openings according to an advantageous embodiment of the invention.
  • the fibers enable simple shaping for any cross-section because the fibers are flexible and textile-technical processes can be used for shaping.
  • the textile fibers In connection with the first matrix material, the textile fibers form a rigid structure, the reinforcement structure.
  • the reinforcement structure has a closed cross section, with a closed circumferential line, transversely to a first main direction or longitudinal direction, the center of gravity axis of the cross section.
  • the center of gravity axis is the axis that is perpendicular to the cross section at each point and runs through its geometric center of gravity.
  • this center of gravity axis is curved; it follows an at least singly curved curve shape.
  • a multiple curvature is also provided. The curvature can run in the component plane, perpendicular to it, or in any three-dimensional space.
  • a reinforcement structure can contain several and different such curvatures. Due to the curved shape, the reinforcement structure is particularly suitable for load-appropriate use in the component.
  • the fibers preferably run around the reinforcement structure without interruption in opposite directions in at least two directions at angles of inclination to the center of gravity of their cross section, preferably less than 90 ° and greater than 0 °, particularly preferably in the range from 5 ° to 85 °.
  • a component with the reinforcement structure according to the invention is particularly well suited to absorbing transverse forces.
  • the reinforcement structure is designed as a flat or rod-shaped reinforcement on a tension side, where the tensile forces are to be absorbed when the component is used. With in particular component-high widened sections in the area of large transverse forces, z. B. on the support, these can also be effectively intercepted.
  • the reinforcement structures can be made as high in the area of large transverse forces as is possible taking into account the required concrete cover in the component.
  • the integrated absorption of transverse forces can also be designed as a double-closed reinforcement structure all around in the component plane.
  • the circumferential double-closed reinforcement structure on the one hand has a self-contained cross-section transverse to the axis of the center of gravity, like the other reinforcement structures according to the invention, and on the other hand is also closed in a component plane, parallel to the plane in which the axis of the focus (possibly curved) runs. This means that the center of gravity forms a closed, z. B. annular contour. Due to the curvature of the center of gravity axis in the component plane, the circumferential double-closed reinforcement structures can be produced, such as B. an annular reinforcing element against punching.
  • the circumferential double-closed reinforcement structure can be designed as a circumferential reinforcement (surface reinforcement) of curved components with any cross-section, wherein the reinforcement itself can follow the shape of the component.
  • the reinforcement of a train side can, for. B. be designed as a flat or rod-shaped, predominantly one-sided plate or beam reinforcement, which corresponds to the tensile stress curve of the component due to a curvature especially at the ends of the reinforcement and in the area of intermediate and end supports.
  • the reinforcement structure consists of, in particular, textile fibers or fiber strands wound crosswise without interruption, which are preferably formed by a first matrix material, a binding agent, such as, for. B. an epoxy resin, are held in the coiled form.
  • the textile fibers or fiber strands which can be present, for example, as yarns, rovings, compartments or twisted threads, are wound in varying ways in a manner suitable for optimum load transfer. If there are low loads in the component at one point, this is taken into account with a lower fiber density when winding. Conversely, if the loads to be expected are high, more fibers are wound up in a narrower space in the web between the openings without reducing the size of the openings in the open-meshed wall, which is required according to the invention.
  • the fibers can absorb more load in the direction of the center of gravity axis, for example tensile forces such as those that occur on the tensile side when the later component is subjected to bending.
  • tensile forces such as those that occur on the tensile side when the later component is subjected to bending.
  • compressive forces such as those that occur on support, can be better compensated for. This is done by absorbing the tensile forces in the reinforcement structure according to the main tensile stresses. Therefore, the orientation of the fibers changes during winding according to the flow of force depending on the main tensile stresses occurring at the respective location.
  • Carbon fibers are preferably provided as textile fibers, which are in particular present as a multifilament yarn or as a roving. But there are also other textile fibers used, such as. B. aramid, glass or basalt fibers, especially for applications in concrete construction.
  • a reinforcement structure that is preferably used is wound with an inconstant or constant round, oval or rectangular, triangular or star-shaped cross section or other closed cross-sectional shapes or geometries.
  • the cross-section changes over the length; in the case of the reinforcement structure with a constant cross-section, the cross-section remains constant over the length.
  • the winding is preferably carried out on a core which already specifies the intended cross-sectional shape and can also be designed to be divisible, which is necessary in particular if the cross-sectional profile is inconsistent.
  • a cross-section that is inconsistent over the length of the reinforcement structure has proven to be particularly advantageous, the structure of which reflects the subsequent load transfer and the type of load on the component or the reinforcement in the component.
  • the reinforcement structure is thus widened in its cross section in at least one area of the longitudinal extent compared to the cross section in the remaining area.
  • the preferred embodiment is designed in such a way that the cross section is widened at a first and a second area and tapers in an intermediate area between the ends, in particular maintaining the original cross section.
  • the widening can be asymmetrical and in this case is accompanied by a curved center of gravity axis of the reinforcement structure in the transition area between the widening and tapering of the cross section.
  • the expanded areas can be arranged on supports and the tapered area on a tension side of the component. Any number of expanded areas can be provided. It can therefore be used in a continuous beam. Such a widening is then located above each support or above each support and the tapered area in between. The widened areas in the component result in a high level of strength against occurring transverse forces, while the unsupported length of the component enables a high bending load-bearing capacity to be achieved. At the same time, the reinforcement material is used effectively and sparingly thanks to the load-appropriate use of the reinforcement structure.
  • the reinforcement according to the invention is also more effective and efficient than all previously known reinforcement elements, since the invention makes it possible to increase the tensile strength of the carbon fibers with an optimal introduction of force into the second Matrix material, especially concrete, and also a high rigidity of the reinforcement structure.
  • the reinforcement according to the invention is used as tensile reinforcement to replace conventional reinforcing bars, it should be emphasized as a further advantage that with the resolution of the usual compact bar geometry according to the invention, an improved bond effect is also achieved in that the bond-effective surface is significantly increased compared to the reinforcement cross-section. This applies equally to the difference between single bars and a wide bar.
  • a further aspect of the present invention relates to a method for producing a reinforcement structure as described above, textile fibers being wound to form an open-meshed hollow structure and the structure thus obtained being fixed by a first matrix material, a hardening fixing agent.
  • a synthetic resin preferably epoxy resin
  • the stable structure thus formed is then finally fixed by pouring concrete and can transmit forces.
  • the geometry of the winding produced can, for. B. can be described by two counter-rotating spirals that form an open cross-section, which can be designed, for example, circular, elliptical, square, rectangular, polygonal or otherwise.
  • Fiber arrangements such as scrim, woven fabric, fleece, etc., preferably in band-like form, come into consideration here.
  • the openings through which the concrete or another second matrix material can get into the interior of the reinforcement structure can already be present in the fiber arrangements or can only be created by the winding process.
  • carbon fibers laminated with resin can be used, which are wound open-meshed and then cured, for example in an autoclave.
  • the invention also relates to the use of a reinforcement structure in a component.
  • a reinforcement structure in a component.
  • it is used as a flat or rod-shaped reinforcement which is curved with respect to the center of gravity of the reinforcement structure.
  • the reinforcement of a tension side of the component is provided.
  • the use of reinforcement is provided, which is designed as a double-closed reinforcement structure, as described above, all around the component level.
  • the invention further relates to a component comprising a reinforcement structure as described above and a second matrix material.
  • a component comprising a reinforcement structure as described above and a second matrix material.
  • concrete is provided as the second matrix material, since the reinforcement structure according to the invention realizes its advantages to a particular degree in concrete construction.
  • the force-transmitting anchoring of the reinforcement structure according to the invention not only takes place as usual with the end regions of the reinforcement structure or in the end regions of the component, but takes place continuously in the component over its entire length. This is made possible by the self-contained, circumferential construction of the reinforcement structure, in which each fiber strand is routed alternately into higher and less stressed areas as a result of the wrapping at regular intervals. This is particularly relevant at the end supports of a component.
  • the present anchoring length is also greater due to the fiber strand course at an intended angle to the longitudinal direction than with a course parallel to the center of gravity axis or in the longitudinal direction.
  • the bond strength is increased by a course of the fiber strands at an angle to the applied force.
  • the angle is less than 90 ° and greater than 0 ° and is preferably in the range from 5 ° to 85 °.
  • a first reinforcement level is arranged close to the surface in the area of the highest tensile load and a second reinforcement level of the self-contained reinforcement is located in a less tensile area between the tensile loaded surface and the neutral zone.
  • this protective effect can be further strengthened, as this means that at least one of the reinforcement levels is moved further away from the temperature-loaded component surface in the important end anchoring areas.
  • Protection is also claimed for a semi-finished part according to the invention, in which the reinforcement structure is concreted in a layer of concrete, the thickness of which is so much less than the height of the reinforcement structure that it is only partially concreted in at least in part and partially protrudes from the concrete.
  • the protruding part of the reinforcement can then be concreted during the completion of the concrete component on the construction site and securely connects the added concrete with the original semi-finished part to form a fully-fledged concrete component.
  • a reinforcement structure with an inconsistent cross section is preferably provided, the cross section being designed to be widened in a first and a second area and tapering in an intermediate area between the ends.
  • the reinforcement structure is completely concreted in the tapered area and partially concreted in the widened area so that a reinforcement layer and a concrete topping can be applied after the semi-finished part has been installed. This ensures the joint load-bearing capacity between the precast element and the concrete.
  • the improvement of the composite force transmission is achieved by the open-mesh structures of the reinforcement structure according to the invention.
  • the present invention enables the use of an open-meshed and wound reinforcement structure or, in particular, a carbon structure, which opens up new possibilities in construction.
  • the open-mesh structure and the filling with the second matrix material concrete results in an optimal transmission of forces between concrete and reinforcement, so that problems with long end anchorage lengths or concrete spalling or delamination no longer occur.
  • the present invention presents a solution to the problem presented at the beginning with the composite of high-performance carbon elements with the second matrix material concrete.
  • the invention is based on a curved rod-shaped or three-dimensional reinforcement structure that is created by winding individual fiber strands. It can, for. B. carbon reinforcement elements are designed and produced in the form of curved tubes that are open-meshed and thus allow the concrete to penetrate into these spaces.
  • the open-mesh arrangement of the textile fibers to form an overall structure ensures that sufficient penetration of the concrete into the cavities takes place. Furthermore, open-meshed structures that were produced using the winding process offer the advantage that the fibers are enclosed on all sides with concrete, creating a very good bond. In addition, by fanning out the reinforcement structure in an open-mesh pipe cross-section, a large surface area with small cross-sectional areas is achieved, whereby a large proportion of the composite forces can be transmitted in the contact area via adhesion and friction. Furthermore, the method offers the advantage that the open-mesh structure can efficiently transmit shear forces in addition to the adhesive and frictional forces. All in all, this results in an efficient and targeted method for transferring the high forces from the reinforcement to the concrete.
  • Another important advantage of the present invention lies in the optimal composite force transfer between the open mesh, wound structure and the concrete.
  • the proposed reinforcement elements or the reinforcement structure can be used efficiently and economically in construction.
  • the limiting factor when using high-strength carbon fibers, the force transmission to the second matrix material, in particular concrete, can be overcome by the present invention. Because the power transmission does not take place via a force-fit connection with the naturally very smooth carbon fibers, as is the case with non-woven fabrics or other structures used as reinforcement, but in a completely different way.
  • the openings in particular by cross-winding or braiding in the advantageous rhombic shape, provide a form fit between the openings and thus the textile reinforcement or carbon reinforcement on the one hand and the second matrix material, in particular the concrete, on the other.
  • the reinforcement structure according to the invention which is optimally designed for the respective application, is likewise given its properties as well as the second matrix material selected adapted to its geometry.
  • Gradient concrete can be selected for this, for example, which, analogous to the reinforcement structure, only has particularly high strength and rigidity where main compressive forces occur.
  • component cross-sections with cavities that is to say hollow profiles, can also be reinforced with the reinforcement structure according to the invention.
  • the formation of thin layers which is already possible due to the use of fiber materials such as carbon, can be supplemented by further measures in order to enable a filigree and resource-saving design.
  • the present invention is much easier to manufacture by using fibers or fiber strands instead of rigid rods.
  • the individual fiber strands can be brought into the intended shape prior to the hardening of the first matrix material and, due to their flexibility still present at this point in time, do not experience any damage from bending.
  • the winding or braiding process can be designed in such a way that fiber strands with a relatively low number of fibers are repeatedly wound around the same shape (e.g. in a circle or in a rectangle), so that a reinforcement structure that is closed in the plane is created in which Assemble reinforcement struts from the individual fiber strands that are wound or braided on top of one another in several passes.
  • the fiber strands form an overlap joint with themselves at every point and no separate measures are required for the frictional connection of the structure to itself or to itself.
  • Fig. 1 shows a component 1 made of concrete 3 as a second matrix material 2 and a textile reinforcement structure 4 with a round, constant cross section A shown schematically.
  • the textile reinforcement structure 4 is designed in the form of a curved tube made of textile fibers 5, in particular carbon fibers, hereinafter also referred to as carbon reinforcement.
  • a center of gravity axis L is shown by a dashed line and runs perpendicular to the cross section A.
  • the textile reinforcement structure 4 is open-meshed, which can be achieved particularly easily and flexibly using the winding manufacturing process and ensures a good bond with the surrounding concrete 3. This also applies to braiding as an alternative to winding.
  • the mesh-like openings of the wound structure are sufficiently large so that the concrete matrix 3 can penetrate the walls of the later built-in reinforcement structure 4.
  • the openings that define the open-mesh structure must therefore be larger than the largest particles in the aggregate of the concrete 3.
  • the size of the mesh is limited by the tensile strength requirements, since the tensile strength of the reinforcement structure decreases with decreasing fiber density.
  • the size of the mesh is preferably not more than 1.5 to 2 times the maximum particle size of the aggregates in the concrete 3.
  • the high tensile forces that the carbon fibers are able to remove can be safely introduced into the concrete 3 due to the dissolution of the solid bar in a wound hollow bar, without this causing problems Concrete spalling or delamination.
  • the illustrated preferred embodiment of a component 1 with concrete 3 as the second matrix material 2 and an embodiment of a reinforcement structure 4 according to the invention leads to very short anchoring lengths thanks to optimal power transmission.
  • the reinforcement structure 4 can also be produced and designed in other cross-sectional shapes. For example, it can be produced with an elliptical cross-section in order to achieve better utilization of the reinforcement element when it is bent.
  • FIG. 4 is a further development of the embodiment Fig. 1 shown, where Fig. 4 a schematic side view and the Figures 5 and 6 show the associated sectional views, the position of the sections AA and BB in each case Fig. 4 is specified.
  • Fig. 4 shows the component 1 in longitudinal extension along the center of gravity axis L (represented by a dashed line), through the sectional views in FIG Figures 5 and 6 the local cross-section A is visible.
  • a radius R at the corners of non-circular cross-sectional shapes helps to reduce harmful transverse forces and tensions in the reinforcement structure 8 acting on the textile fibers 5 avoid. This is achieved in particular through a corresponding design of the mold on which the textile fibers 5 are wound.
  • the manufacturing process for the reinforcement structure 8 by winding or braiding allows the manufacture of three-dimensional reinforcements with a variable or inconsistent cross section.
  • the present exemplary embodiment shows a variant for a three-dimensional carbon scrim, which is also wound and thus not over the entire surface, but closed in cross section.
  • the textile fibers 5 or the carbon fibers were arranged in a load-optimized manner.
  • the carbon fibers are arranged near the lower edge of the component in order to have the greatest possible lever arm.
  • the reinforcement structure 8 is expanded and the fibers 5 are guided upwards, whereby the three-dimensional fabric, the reinforcement structure 8, also functions as transverse force reinforcement.
  • the reinforcement element is the reinforcement structure 4, 6, 8 with different densities of the winding of fibers 5.
  • B. be wound more heavily in areas with higher loads, so that local maximum loads can also be compensated for.
  • reinforcement structure 4, 6, 8 according to the invention, further areas of application and potentials arise that did not exist before.
  • Another advantage of a three-dimensional and prefabricated reinforcement structure 4, 6, 8 is that it can be installed easily and without further processing steps on the construction site or in the precast plant with a very low weight. Thus, additional work steps can be avoided and costs can be saved.
  • Fig. 7 represents a further development of the embodiment according to Fig. 4
  • semi-finished parts 10 can also be produced.
  • the three-dimensional reinforcement structure 4, 6, 8 is inserted into the formwork. Then a thin Placed concrete layer. After the concrete has hardened, the semi-finished part 10 is delivered to the construction site.
  • the three-dimensional reinforcement structure 8 ensures sufficient bond joint load-bearing capacity.
  • the reinforcement structure 8 can serve as a spacer for a subsequently arranged upper reinforcement layer 9, which z. B. is necessary for the execution of continuous beams.
  • the top concrete 12 and reinforcement layer 9 are not part of the semi-finished part 10, but have already been drawn or indicated in the illustration of the semi-finished part 10 for better understanding, the upper continuous line showing the height of the concrete in the finished component, the top concrete 12.
  • Fig. 8 shows in a schematic perspective illustration an embodiment of a reinforcement structure 13 according to the invention. This also points transversely to the center of gravity axis L (not shown here) (cf. Figures 1 and 4th ) a closed cross-section A.
  • the textile fibers 5 are wound transversely to the center of gravity axis L in the exemplary embodiment shown and form the closed cross section A.
  • the reinforcement structure 13 itself forms a closed cross section in the component plane E, ie the ends of the reinforcement structure 13 or the center of gravity axis L are connected to one another to form a closed, essentially ring-shaped structure.
  • the reinforcement structure 13 thus forms a reinforcement element 15 against punching, which is suitable and provided for a corresponding use in concrete construction, in particular at locations where the load is discrete.
  • the second matrix material 2, the concrete 3 appears transparent, so that the installation situation of the reinforcement structure 13 and the type of construction of the reinforcement element 15 can be seen.
  • Fig. 9 shows a further embodiment of a reinforcement structure according to the invention, designed as a cross-shaped combination structure 30.
  • two flat tubes with an oval cross-section are twisted together to form a cross-shaped cross-section or are made directly in this way to create a spatial structure that has a large surface and consequently has a large composite transmission. In this way, high forces and high composite forces can be transmitted in a targeted manner.
  • Fig. 10 shows a further embodiment of a reinforcement structure according to the invention, designed as a coaxial structure 40.
  • two reinforcement structures 4 with a round cross-section and constant cross-sectional shape, hereinafter also referred to as mesh tubes, with different diameters are nested essentially coaxially one inside the other, by more cross-sectional area and thus a higher load-bearing capacity with the same geometric boundary conditions. This creates an even more efficient cross-section.
  • Both reinforcement structures 4 are designed to be open-meshed so that the concrete can penetrate between them. Additional threads 42 are arranged for fixation so that the laying, transport and processing of the coaxial structures 40 can be carried out simply and in a targeted manner.
  • Fig. 11 shows a further embodiment of a reinforcement structure according to the invention, designed as a double combination structure 34, two flat tubes 20 being joined together and a further reinforcement structure 4, also referred to as a mesh, being introduced in their cutting line. This is preferably done directly during manufacture.
  • Fig. 12 shows a further embodiment of a reinforcement structure according to the invention, designed as a further double combination structure 34 ', in contrast to Fig. 11 the reinforcement structure 4 (mesh) introduced in the cutting line has a larger diameter.
  • Fig. 13 shows a further embodiment of a reinforcement structure according to the invention, designed as a triple combination structure 32, in which three flat tubes 20 are joined together to form a star-shaped cross section.
  • Fig. 14 shows a further embodiment of a reinforcement structure according to the invention, designed as a further combination structure 36.
  • the combination structure 32 in which three flat tubes 20 are joined together to form a star-shaped cross section, and the reinforcement structure 4 (mesh) are joined together, similar to the exemplary embodiments from FIGS Figures 11 and 12 .
  • Fig. 15 shows a schematic side view of the use of an embodiment of the reinforcement structure 4 according to the invention in a continuous beam 38.
  • the curved design of the reinforcement structure 4 over the supports 37 is associated with a protective effect in the event of fire, since it means that at least one of the reinforcement levels in the important end anchoring or support areas is led even further away from the temperature-loaded component surface.
  • the widened regions 7 result in a high level of strength against occurring transverse forces, while a high flexural strength can be achieved over the unsupported length of component 1.
  • the reinforcement material, the textile fibers 5, are used effectively and economically through the use of the reinforcement structure 4, 8 in accordance with the load.

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  • Civil Engineering (AREA)
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  • Reinforcement Elements For Buildings (AREA)
EP20161189.4A 2019-03-05 2020-03-05 Structure de renfort textile pour un composant, procédé de fabrication pour une structure de renfort, composant et pièce semi-finie Active EP3705657B1 (fr)

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DE102019105493.1A DE102019105493A1 (de) 2019-03-05 2019-03-05 Textile Bewehrungsstruktur für ein Bauteil, Herstellungsverfahren für eine Bewehrungsstruktur, Bauteil und Halbfertigteil
DE102019122073 2019-08-16

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998009042A1 (fr) 1996-08-28 1998-03-05 Sacac Schleuderbetonwerk Ag Structures fibrorenforcees de forme tubulaire et/ou en baguette
WO2006138224A1 (fr) * 2005-06-14 2006-12-28 Lancelot Coar Beton a armature textile
DE202005019077U1 (de) 2005-12-06 2007-04-19 nolasoft Ingenieurgemeinschaft Ozbolt Mayer GbR (vertretungsberechtigter Gesellschafter: Dr.-Ing. Utz Mayer, 70178 Stuttgart) Bewehrungselement für Tragwerke aus Stahlbeton, Spannbeton od.dgl.
DE102012101498A1 (de) 2012-01-03 2013-07-04 Groz-Beckert Kg Bauelement und Verfahren zur Herstellung eines Bauelements
EP2530217B1 (fr) 2011-05-30 2015-10-14 Groz-Beckert KG Corps de construction préfabriqué en béton textile
DE102015100386A1 (de) 2015-01-13 2016-07-14 Technische Universität Dresden Bewehrungsstab aus Filamentverbund und Verfahren zu dessen Herstellung
DE102016100455A1 (de) 2015-01-13 2016-07-14 Technische Universität Dresden Textile Bewehrung und deren Herstellung
DE102016124226A1 (de) 2015-12-16 2017-06-22 Technische Universität Dresden Gitterträger für Betontragwerke
DE102014200792B4 (de) 2014-01-17 2018-04-26 Materialforschungs- und -prüfanstalt an der Bauhaus-Universität Weimar Bautextil, Verfahren zu dessen Herstellung und Verwendung
DE102017102366A1 (de) 2017-02-07 2018-08-09 Technische Universität Dresden Endverankerung von textilen Flächengebilden

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998009042A1 (fr) 1996-08-28 1998-03-05 Sacac Schleuderbetonwerk Ag Structures fibrorenforcees de forme tubulaire et/ou en baguette
CH691608A5 (de) * 1996-08-28 2001-08-31 Sacac Hergiswil Ag Rohr- und/oder stabförmige faserverstärkte Konstruktionen.
WO2006138224A1 (fr) * 2005-06-14 2006-12-28 Lancelot Coar Beton a armature textile
DE202005019077U1 (de) 2005-12-06 2007-04-19 nolasoft Ingenieurgemeinschaft Ozbolt Mayer GbR (vertretungsberechtigter Gesellschafter: Dr.-Ing. Utz Mayer, 70178 Stuttgart) Bewehrungselement für Tragwerke aus Stahlbeton, Spannbeton od.dgl.
EP2530217B1 (fr) 2011-05-30 2015-10-14 Groz-Beckert KG Corps de construction préfabriqué en béton textile
DE102012101498A1 (de) 2012-01-03 2013-07-04 Groz-Beckert Kg Bauelement und Verfahren zur Herstellung eines Bauelements
DE102014200792B4 (de) 2014-01-17 2018-04-26 Materialforschungs- und -prüfanstalt an der Bauhaus-Universität Weimar Bautextil, Verfahren zu dessen Herstellung und Verwendung
DE102015100386A1 (de) 2015-01-13 2016-07-14 Technische Universität Dresden Bewehrungsstab aus Filamentverbund und Verfahren zu dessen Herstellung
DE102016100455A1 (de) 2015-01-13 2016-07-14 Technische Universität Dresden Textile Bewehrung und deren Herstellung
DE102016124226A1 (de) 2015-12-16 2017-06-22 Technische Universität Dresden Gitterträger für Betontragwerke
DE102017102366A1 (de) 2017-02-07 2018-08-09 Technische Universität Dresden Endverankerung von textilen Flächengebilden

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