Reinforcement and method for manufacturing such a reinforcement

Abstract

The present invention provides a composite reinforcement extending between a first end and a second end, with a curved section (20) delimited by a first section (21) extending from the first end (11) and by a second section (23) extending from the second end (13). The reinforcement is formed by at least two profiles (50, 52, 54) at least partially bonded together, wherein the profiles extend in an extension direction between a first longitudinal profile end and a second longitudinal profile end. The profiles comprise reinforcing fibers oriented parallel to each other in the curved section. A method for manufacturing such a reinforcement and the use of such a reinforcement, or a reinforcement obtained by such a method, in a structure to be reinforced are also provided.

Description

[0001] The present invention relates to the field of structural reinforcement, such as concrete structures in the broadest sense. More specifically, the present invention relates to a reinforcement, a method for manufacturing such a reinforcement, and the use of such a reinforcement or a reinforcement obtained by such a method in a structure to be reinforced.

[0002] We already know the use of reinforcements for civil engineering to strengthen reinforced concrete structures in bending, tension, compression and shear, for example in the following application cases: concrete slab on load-bearing wall with or without cantilever, concrete slab positioned between two walls, pylon on foundation.

[0003] Documents DE 199 03 681 and EP 2 711 484 describe profiles with reinforcing fibers.

[0004] The reinforcement is embedded in an epoxy-type adhesive on-site to permanently bond it to the surrounding concrete. The reinforcement is partially inserted into a borehole drilled in the structure to be reinforced, for example, approximately 30 to 50% of its length, and the remaining length outside the borehole is inserted into a groove cut in the structure to be reinforced.

[0005] Document EP 3 318 690 describes the technology for inserting carbon fiber profiles into concrete for cantilevered elements. In this document, a curved, single-element reinforcement, primarily composed of carbon fiber, is encapsulated in a matrix. The reinforcement is produced by a hot forming process with local twisting / stranding of the fibers. This is achieved by softening the matrix that binds the structural fibers of the initial lamellar reinforcement. The fibers are decompressed and then recompressed within their matrix, thus losing their initial orientation in the twisted / stranded zone. This fiber misorientation in the lamellar curvature zone leads to a loss of tensile and compressive strength (modulus and resistance), which is compensated for by applying a local fiber reinforcement around the perimeter of the lamellar.

[0006] This type of anterior-art reinforcement addresses the mechanical stress in tension and compression by adding extra reinforcement in the bending zone. However, the loosening during the bending process and the localized reinforcement create a significant risk of localized performance loss in the critical curved section.

[0007] In addition, there is a high risk of damage from crack propagation of the delamination type, following a manufacturing defect in the initial laminate, a manufacturing defect during the hot post-forming of the laminate or exposure to an external impact of the bent profile during handling during bending, transport to site, or installation on site.

[0008] One object of the present invention is to provide a robust reinforcement. Another object of the present invention is to provide a reinforcement that is simple to use on construction sites. Summary of the invention

[0009] To this end, the invention proposes a reinforcement extending between a first end and a second end, with a curved section delimited by a first section extending from the first end and a second section extending from the second end. The reinforcement is formed by at least two profiles, at least partially bonded together, wherein the profiles extend in an extension direction between a first longitudinal end of a profile and a second longitudinal end of a profile. The profiles comprise reinforcing fibers oriented parallel to each other in the curved section. The at least two profiles are strips with a cross-section, the cross-section having a height and a width, the height being less than the width. The at least two profiles are pultruded profiles with reinforcing fibers of the carbon or glass reinforcement type.

[0010] In other words, the profiles are composite profiles. The reinforcing fibers are oriented parallel to each other, meaning they follow the orientation of the profiles in the curved section, and therefore the curvature of the curved section. The reinforcing fibers are oriented according to the extension direction of the profiles in the curved section, which ensures performance.

[0011] The performance of the profiles assembled in the reinforcement thus corresponds to the performance of the flat pultruded profiles, with virtually no loss of performance.

[0012] Furthermore, using at least two profiles for reinforcement limits the risk of damage to the reinforcement thus obtained by crack propagation of the delamination type, following a manufacturing defect of the initial laminate, a manufacturing defect during the post-forming of the laminate, or exposure to an impact of the bent profile during installation on site.

[0013] In one embodiment, the reinforcing fibers are oriented parallel to each other along the entire length of the profiles. This ensures continuous homogeneity of tensile, compressive, flexural, and shear performance of the reinforcement along its entire length.

[0014] In one embodiment, at least two profiles are bonded at least in the curved section. In another embodiment, at least two profiles are bonded to each other along their entire length. This allows for a curvature angle that pre-adapts to the angle created between the cut and the bore in the structure to be reinforced, thus maintaining the reinforcement in position during the polymerization phase of the bonded reinforcement / concrete interface on site.

[0015] It is understood that by creating an assembly of at least two profiles bonded together in the curved section, the failure of the reinforcement is limited by reducing the risk of failure propagation from one profile to another. Furthermore, the bonded interfaces, with a position-holding adhesive, limit crack propagation throughout the composite cross-section by acting as fuses. Thus, a reinforcement can maintain a residual strength and stiffness equivalent to that of the unaffected profiles.

[0016] In another embodiment, the at least two profiles are spaced apart at the first end and / or the second end. At least one spacer element may be provided between the profiles to maintain a gap between the at least two slats at the first end and / or the second end.

[0017] By bonding the at least two profiles only in the curved section, the at least two profiles are spaced apart at the first and / or second end of the reinforcement. This gives the reinforcement greater flexibility during installation, regardless of its cross-section. This facilitates insertion of the reinforcement into the structure being reinforced, i.e., drilling and cutting. Indeed, the stiffness of carbon can make the reinforcement extremely rigid, limiting its flexibility during installation.

[0018] It is noted that the flexibility perceived by the operator on site is equivalent to that of a single thin profile. Therefore, the flexibility of the reinforcement during installation is significantly greater than that of a monolithic reinforcement of the same cross-section, especially when a large number of profiles are assembled.

[0019] Furthermore, partial bonding of the profiles significantly increases the available bonding surface area at the reinforcement ends with the adhesive used on site, because the surface area of ​​each individual strip is taken into account at the reinforcement ends, not just the surface area of ​​the monolithic reinforcement. Having an increased interface adhesive / reinforcement contact surface helps to mitigate common bonding defects, such as bubbles, poor localized cleaning of the reinforcements, etc.

[0020] According to one embodiment, the at least two profiles are superimposed and / or juxtaposed.

[0021] The at least two profiles are strips with a cross-section, the cross-section having a height and a width, the height being less than the width. For example, a profile may have a thickness generally less than 5 mm and preferably less than 3 mm with a width preferably greater than or equal to the thickness.

[0022] At least two profiles are pultruded with carbon fiber reinforcement. Pultruded profiles offer stable performance in terms of modulus and rigidity in tension-compression, bending, and shear, with an inherent risk of defects due to the processing of weak composite materials. Pultrusion allows for the production of straight profiles, for example, of the lamella type. The required curvature on-site is achieved by assembling several pultruded lamella-type profiles using a glued adhesive to hold them in place, without altering the initial performance of the lamellae.

[0023] The present invention also proposes a method for manufacturing a reinforcement as described above, comprising the following steps: shape the first profile according to the shape of the reinforcement to be obtained, with a curved section framed by two straight sections, glue at least one section of a second profile onto the first profile, including juxtaposing and / or superimposing the second profile onto the first profile, maintain the orientation of the fibers in the profile, the fibers being parallel to each other before assembly and being parallel after gluing, to obtain the reinforcement.

[0024] According to one embodiment, the process includes gluing the profiles into the curved section.

[0025] According to one embodiment, the process includes a step of cutting the profiles, along the length of the reinforcement.

[0026] In one embodiment, the shaping step involves positioning the first profile on a reinforcement template, the template having a curvature corresponding to the curvature of the curved section of the reinforcement. Using a template facilitates the assembly of the profiles and holds them in place during assembly, according to the desired final shape of the reinforcement. All the necessary profiles can be glued together, and the reinforcement can then be removed from the template.

[0027] The present invention also proposes the use of a reinforcement such as described above, or obtained by a process such as described above, in a structure to be reinforced. For example, in civil engineering for the reinforcement of existing structures. This may involve reinforcing cantilevered elements, such as a concrete slab or beam between load-bearing supports, a concrete slab or beam on a central support, a load-bearing wall or column between a foundation and a concrete beam or slab, or a concrete balcony slab on a load-bearing wall. Alternatively, it may involve structural pylons on foundations, such as wind turbine towers. Such reinforcement can, however, be used in many other fields, such as the reinforcement of aircraft wings, ships, or superstructures.

[0028] The process may include the step of coating the reinforcement with glue before insertion, in particular coating the free ends of the profiles. Brief description of the figures

[0029] Other features and advantages of the invention will become more apparent upon reading the description of several currently preferred embodiments, given by way of example only, and with reference to the attached drawings 1 to 10, among which: there [ figure 1 ] represents a longitudinal cross-sectional view of a reinforcement according to one aspect of the present invention, the [ figure 2 ] represents a longitudinal cross-sectional view according to one aspect of the present invention, the [ figure 3 ] represents a longitudinal cross-sectional view according to one aspect of the present invention, the [ figure 4 ] represents a top view of a reinforcement according to one aspect of the present invention, the [ figure 5 ] illustrates a top view of a reinforcement according to one aspect of the present invention, the [ figure 6 ] illustrates a top view of a reinforcement according to one aspect of the present invention, the [ figure 7] illustrates a method for manufacturing a reinforcement according to one aspect of the present invention, the [ figure 8 ] illustrates a method of reinforcing a structure using reinforcement according to one aspect of the present invention, the [ figure 9 ] illustrates a work that needs strengthening, the [ Figure 10 ] illustrates a method of reinforcing a structure using reinforcement according to another aspect of the present invention. Detailed description

[0030] In the figures, identical elements are identified by identical numerical references.

[0031] THE figures 1 to 6 illustrate a reinforcement 1 according to different aspects of the present invention.

[0032] The reinforcements 1 extend between a first longitudinal end 11 and a second longitudinal end 13 with a curved section 20. The curved section 20 is framed by a first section 21 extending from the first longitudinal end 11 and a second section 23 extending from the second longitudinal end 13.

[0033] The curved section can be central, with the first and second sections being of the same length and the reinforcement thus being symmetrical with respect to its center, or the curved section can be closer to the first longitudinal end or the second longitudinal end, with the first and second sections of different lengths.

[0034] Reinforcements 1 comprise an assembly of profiles 50, 52, 54 bonded together. The number of profiles is given only as an example and may vary depending on the required stiffness of the reinforcement; reinforcements typically have at least two profiles.

[0035] In the implementation of the figure 1 Profiles 50, 52, and 54 are stacked and glued together along their entire length. Therefore, profiles 50, 52, and 54 do not have the same radius of curvature; the lower profile has a smaller radius. The first section 21 and the second section 23 are straight.

[0036] In the implementation of the figure 2 , the profiles 50, 52, 54 are superimposed glued one on top of the other only in the curvature area of ​​the reinforcement.

[0037] To maintain a gap between the free ends of profiles 50, 52, and 54, spacers 60 are inserted between the profiles. In the example of the figure 2 , there are spacers 61, 62, only in the first section 21, but spacers can be put between the profiles in the first section and / or in the second section, depending on the flexibility or rigidity to be obtained.

[0038] In the implementation of the figure 3 , the profiles 50, 52, 54 are superimposed glued one on top of the other in the curvature area of ​​the reinforcement and on part of the first section 21 and the second section 23, but not over the entire length of the reinforcement.

[0039] In the implementation of the figure 4 , the profiles 50, 52, 54 are juxtaposed next to each other and glued together along their entire length.

[0040] In the implementation of the figure 5 , profiles 50, 52 are superimposed (only the upper profile is visible in the view of the figure 5 ) and the profiles 52, 54 are juxtaposed next to each other and glued together along their entire length.

[0041] In the implementation of the figure 6 , the profiles are juxtaposed but are glued only in the curved part 20.

[0042] Finally, as we can see, the first section and the second section can have different lengths.

[0043] In embodiments in which the profiles are not glued along the entire length of the reinforcement, the profiles are thus separated from each other at the first end and / or the second end.

[0044] At least one spacer element may be provided between the profiles to maintain a gap between the at least two profiles at the first longitudinal end 11 and / or at the second longitudinal end 12. The spacer element(s) allow a calibrated gap.

[0045] The adhesive is a thin layer, used to create a bond that holds the profiles in place. Its purpose is to ensure the reinforcement remains secure while it is being inserted into the structure being reinforced.

[0046] An example of an adhesive is the reference "ETANDEX", registered trademark "ETANCOL", registered trademark, 492, or the adhesive "ARALDITE", registered trademark, 2010. Advantageously, reinforcements can be obtained with an angle between the first and second sections of between 0 and 90 degrees. Angles of less than 30 degrees can easily be achieved.

[0047] The profiles can have any type of cross-section, including round, square, and rectangular. In a preferred embodiment, the profiles have a rectangular cross-section, which is the most suitable for forming the reinforcement.

[0048] Typically, profiles of the same length are assembled by stacking or placing them side by side, the length of each profile then corresponding to the desired reinforcement length. Profiles of different lengths can also be joined end to end to obtain a reinforcement of a specific length.

[0049] The profiles are typically pultruded profiles, meaning composite profiles produced by the pultrusion process, consisting of organic resins reinforced with fibers, preferably glass or carbon. Before assembly, the profiles are essentially flat, with the profile oriented along a longitudinal axis. The reinforcing fibers are also aligned along the profile; that is, they extend in the direction of the longitudinal axis and thus follow the profile's orientation. In other words, the reinforcing fibers are parallel to each other.

[0050] The profiles have a straight profile. The profile is thin, generally less than 5 mm and preferably less than 3 mm. The width is greater than or equal to the thickness, for the profile's flexibility. In other words, the profiles are strips.

[0051] It is understood that bonding curved profiles does not alter the fiber orientation within the profile. The reinforcing fibers follow the longitudinal orientation of the profile and remain aligned with the profile's orientation in the curved central section. Thus, for a given profile, the reinforcing fibers have the same radius of curvature as the profile itself, while remaining parallel to each other.

[0052] As a result, no fiber disorganization occurs during the assembly of the reinforcement using adhesive to hold it in place. The performance of the profiles assembled within the reinforcement thus corresponds to the performance of the flat pultruded profiles, with virtually no loss of performance.

[0053] Furthermore, it is understood that the adhesive between the profiles creates an interface layer that acts as a crack retarder and a fuse, preventing crack propagation within the reinforcement. With such an assembly of profiles bonded together to form the reinforcement, the risk of failures propagating from one profile to the others is limited. Consequently, there is less failure of the entire reinforcement. The bonded interfaces act as inter-layer fuses.

[0054] Even if a profile has defects, which may result from defects inherent in the manufacturing process of the profile and / or from impacts inherent in manufacturing, transport and installation on construction sites, the reinforcement will be able to retain a residual strength and rigidity equivalent to the unimpacted profiles.

[0055] A manufacturing process for a composite reinforcement is illustrated with reference to the figure 7 .

[0056] In a first step S1, the first profile is shaped according to the shape of the reinforcement to be obtained, with a curved section framed by two straight sections.

[0057] In a non-limiting example, a first profile is positioned on or in a template for assembly.

[0058] The template has the desired shape and curvature for reinforcement, with a curved template section framed by a first, straight template section and a second template section. The first and second template sections are straight. The first and second template sections form an angle with each other that can be between 0 and 90°.

[0059] The template reproduces the curved section 20 of the reinforcement to be obtained framed by the first section 21 extending from the first longitudinal end 11 and a second section 23 extending from the second longitudinal end 13.

[0060] During assembly, the first profile conforms to the shape of the template and therefore to the reinforcement to be obtained.

[0061] In a second step S2, a second profile can then be glued to the first profile, either by juxtaposing it or by superimposing it on the first profile, according to the template, and therefore the reinforcement to be manufactured.

[0062] The first and / or second profile can be coated with glue, either before or after positioning it in the template. Pre-positioning can be done to allow the profile to take on the shape and curvature before gluing, thus facilitating assembly.

[0063] We continue adding the profiles one by one to assemble as many profiles as needed. We assemble as many profiles as necessary, gluing them together and / or placing them side by side.

[0064] The profiles are produced by pultrusion, ideally resulting in a straight, thin profile, generally less than 5 mm thick and preferably less than 3 mm, with a width preferably greater than the thickness. These profiles are typically wound onto reels, and can then be cut to the desired reinforcement length.

[0065] We understand that the profiles can be cut to the length of the reinforcement, but that it is also possible to cut several profiles, which, placed end to end, have the length of the reinforcement.

[0066] We cut as many lengths of pultruded profile as needed to make up the reinforcement.

[0067] The cutting step is optional because it is also possible to obtain by pultrusion a profile already of the correct length, without having to cut the profile, or to have remnants of profile of the desired length.

[0068] It is noted that the straight profiles can be made available for assembly beforehand, or can be made available as the assembly progresses.

[0069] Before assembly, the profiles are essentially flat, with the profile oriented along a longitudinal axis. The reinforcing fibers are also aligned along the profile. In other words, the reinforcing fibers extend in the direction of the longitudinal profile axis and thus follow the profile's orientation.

[0070] After assembly, the reinforcing fibers remain aligned in the longitudinal direction of the profile, even in the bending area, because the profile is simply bent, but there is no twisting or twisting of the fibers.

[0071] Once the profiles are assembled, the bonded interfaces are polymerized, and then the resulting reinforcement is removed from the jig.

[0072] As previously mentioned, it is possible to prepare monolithic reinforcements, in which the profiles are glued along the entire length of the reinforcement, but it is also possible to do partial gluing, at least in the area of ​​curvature, or in the area of ​​curvature and part of the straight sections.

[0073] In this configuration, spacers can be added between the unglued sections of the profiles, to maintain a gap between the ends of the spacers.

[0074] The procedure for installing reinforcement in a structure to be reinforced 70 is described with reference to the figure 8 and the work to be reinforced from the figure 9 .

[0075] The structure to be reinforced 70 of the figure 9 is a concrete balcony slab 72 on a load-bearing wall 74, given as an example only.

[0076] In a first step S10, a groove 80 is made on the surface of the structure to be reinforced, here on the surface of the slab 72 and a borehole 82 is drilled in the structure to be reinforced, here in the load-bearing wall, into which the reinforcement will be inserted.

[0077] Next, the glue is injected into the bore at step S20, and part of the reinforcement is inserted into the bore 82 at step S30. The glue can then be injected into the groove 80 and the other part of the reinforcement positioned in the groove, at step S40.

[0078] It is easier to start by inserting the reinforcement into the hole, for the flexibility of the reinforcement.

[0079] In the process of figure 8The reinforcement consists of profiles that are bonded together in the curved section but not at the free ends. Therefore, the reinforcement has a very high degree of flexibility at its free ends relative to its overall cross-section. The flexibility perceived by the operator on site is equivalent to that of a single profile, typically a strip. Having significant flexibility in the reinforcement during installation, regardless of its cross-section, facilitates its insertion into boreholes and chases.

[0080] The stiffness of carbon can indeed very quickly make the profile extremely rigid, limiting its flexibility during installation. Consequently, the flexibility of the reinforcement during installation is therefore, for the same cross-section of final reinforcements fixed to the structure, much greater than that of a reinforcement in which the profiles are bonded along their length.

[0081] If the reinforcement has profiles with free ends, all exposed surfaces can be pre-coated with glue, i.e. each profile can be coated with glue in the free areas.

[0082] Finally, once the reinforcement is correctly positioned, there remains the step of polymerizing the adhesive with the reinforcement integrated into the core of the structure to be reinforced to guarantee adhesion to the concrete and to the carbon reinforcement, at the S50 stage.

[0083] It is understood that the available bonding surface on the ends of the reinforcement is increased with the glue used on site, because the surface of each profile is taken into account at the ends of the reinforcement.

[0084] In other words, having free surfaces of the profiles not bonded together increases the contact area with the reinforcement / concrete interface adhesive, thereby increasing the bond strength between the reinforcement and the concrete. The contact area will be greatest when the reinforcement profiles are bonded together only in the curved section.

[0085] There Figure 10 illustrates another method of reinforcing the structure to be reinforced. figure 9 , using a reinforcement according to another aspect of the present invention. In this aspect, the reinforcement is monolithic, in which the profiles are bonded along the entire length of the reinforcement.

[0086] In the first step S110, a groove 80 is cut into the surface of the structure to be reinforced, and a borehole 82 is drilled into it, into which the reinforcement will be inserted. An angle is provided between the groove and the borehole for the reinforcement in bending, tension, compression, and shear of reinforced concrete structures, for example in the following application cases: concrete slab on a load-bearing wall with or without a cantilever, concrete slab positioned between two walls, pylon on a foundation.

[0087] Next, the glue is injected into the bore at step S120, and part of the reinforcement is inserted into the bore.

[0088] We can then inject the glue into the groove (step S130) and position the other part of the reinforcement in the groove (step S140).

[0089] The reinforcement / concrete interface adhesive can be optimized to increase the bond strength between the reinforcement and the concrete.

[0090] It is easier to start by inserting the reinforcement into the hole, for the flexibility of the reinforcement.

[0091] Advantageously, the prepared reinforcement has a curved section which has an angle of curvature allowing pre-adaptation to the angle created between the cut and the bore to hold the reinforcement in position during the polymerization phase of the bonded reinforcement / concrete interface on site.

[0092] Finally, once the reinforcement is correctly positioned, there remains the step of polymerizing the adhesive with the reinforcement integrated into the core of the structure to be reinforced to guarantee adhesion to the concrete and to the carbon reinforcement (step S150).

[0093] The reinforcement fibers remain oriented in the longitudinal direction, even in the curved section, during manufacturing. This limits performance losses in the critical curved section, unlike the decompaction that occurs during the curvature of prior art reinforcements, which generates a high risk of localized performance losses in the critical curved section. Advantageously, such reinforcements exhibit continuous homogeneity of tensile, compressive, flexural, and shear performance along their entire length.

[0094] Furthermore, the risk of damage from crack propagation, such as delamination, is limited by the glued laminate manufacturing process. The adhesive between the profiles can act as a fuse or mitigate crack propagation that could result from a manufacturing defect in the initial laminate, a manufacturing defect during the hot post-forming of the laminate, or exposure to impact of the bent profile during on-site installation.

[0095] On the other hand, by assembling different profiles, we limit the risk of having a manufacturing defect in the profiles throughout the reinforcement.

[0096] The risks of complete failure of the reinforcements in the event of a localized overload of the structure, localized failure of the composite, impact on the composite during installation, are thus limited.

[0097] We can also have significant flexibility in the reinforcement during installation, regardless of its section, to facilitate the insertion of the reinforcement into boreholes and trenches.

[0098] Finally, the examples are given with reference to a concrete balcony slab, but this is only one example.

[0099] In summary, it remains to be noted that the invention provides an advantageous solution, with a limited number of parts and an intuitive setup, requiring only a limited number of maneuvers, thus facilitating the assembly of supported elements such as pipes. List of reference numbers :

[0100] Reinforcement 1 first longitudinal end 10 second longitudinal end 13 curved section 20. first straight section 21 second straight section 23 profiles 50, 52, 54 spacers 61 62 structure to be reinforced 70 concrete balcony slab 72 load-bearing wall 74 trench 80 borehole 82

Claims

1. Reinforcement extending between a first end and a second end with a curved section (20) delimited by a first section (21) extending from the first end (11) and by a second section (23) extending from the second end (13), the reinforcement being formed by at least two profiles (50, 52, 54) at least partially bonded together, in which the profiles extend in an extension direction between a first longitudinal profile end and a second longitudinal profile end, the profiles comprising reinforcing fibers which are oriented parallel to each other in the curved section, in which the at least two profiles are strips with a cross-section, the cross-section having a height and a width, the height being less than the width, in which the at least two profiles are pultruded profiles with reinforcing fibers of the carbon or glass reinforcement type.

2. Reinforcement according to claim 1, in which the reinforcing fibers are oriented parallel to each other over the entire length of the profiles.

3. Reinforcement according to any one of the preceding claims, wherein the at least two profiles are superimposed and / or juxtaposed.

4. Reinforcement according to any one of the preceding claims, wherein at least two profiles are bonded at least in the curved section.

5. Reinforcement according to any one of the preceding claims, wherein the at least two profiles are bonded together along their entire length.

6. Reinforcement according to any one of the preceding claims, wherein the at least two profiles are separated from each other at the first end and / or the second end.

7. A method for manufacturing a reinforcement according to any one of claims 1 to 6, comprising the following steps: - shaping the first profile according to the shape of the reinforcement to be obtained, with a curved section framed by two straight sections, - gluing at least one section of a second profile (52) onto the first profile, including juxtaposing and / or superimposing the second profile onto the first profile, - maintaining the orientation of the fibers in the profile, the fibers being parallel to each other before assembly and being parallel after gluing, to obtain the reinforcement.

8. Method according to claim 7, comprising gluing the profiles in the curved section.

9. Method according to claim 7 or 8, comprising the step of cutting the profiles (50, 52, 54), over the length of the reinforcement.

10. A method according to any one of claims 7 to 9, wherein the shaping step comprises positioning the first profile (50) on a reinforcement template, the template having a template curvature corresponding to the curvature of the curved section of the reinforcement.

11. A method according to any one of claims 7 to 10, comprising the step of coating the reinforcement with glue before insertion, in particular of coating the free ends of the profiles.

12. Use of a reinforcement according to any one of claims 1 to 6 or obtained by a process according to any one of claims 7 to 11, in a structure to be reinforced.

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