Protective Panel Assembly And Method For Repairing Such A Protective Panel Assembly

Abstract

The invention relates to a protective panel assembly and to a method for repairing an impact hole in the protective panel assembly. The protective panel assembly has three textile-reinforced concrete panels which are connected to one another via connecting elements to form a unit. The textile-reinforced concrete panels form an outer panel, an inner panel and an intermediate panel. Arranged between the outer panel and the intermediate panel is at least one fiber panel comprising fiber bundles of glass and/or aramid fibers incorporated in a synthetic matrix. An intermediate space exists between the intermediate panel and the inner panel. The intermediate space can be filled with air and/or a solid filler material which can be plastically and/or elastically deformed. Additional panels or layers can be omitted.

Claims

1. A protective panel assembly (20) for protecting against gunfire and/or explosions, the assembly comprising: at least three textile-reinforced concrete panels (21) which form an outer panel (22), an inner panel (23) and an intermediate panel (24), at least one fiber panel (50) which comprises synthetic fiber bundles (51) embedded in a synthetic matrix (53), wherein the at least one fiber panel (50) is arranged between the outer panel (22) and the intermediate panel (24), a plurality of connecting elements (40) having a first end (41) embedded in a concrete matrix (31) of one of the textile-reinforced concrete panels (21) and having a second end (42) embedded in a concrete matrix (31) of another of the textile-reinforced concrete panels (21), wherein the inner panel (23) is arranged at a distance from the intermediate panel (24) so as to form an intermediate space (57).

2. The protective panel assembly according to claim 1, wherein the at least one fiber panel (50) has opposing sides and abuts with one side directly against the outer panel (22) and with the other side directly against the intermediate panel (24).

3. The protective panel assembly according to claim 1, wherein one of the plurality of connecting elements (40) is embedded with the first end (41) thereof in a concrete matrix (31) of the outer panel (22) and extends past the at least one fiber panel (50).

4. The protective panel assembly according to claim 1, wherein one of the plurality of connecting elements (40) is embedded with the first end (41) thereof in a concrete matrix (31) of the outer panel (22) and does not pass through an outer side (25) of the protective panel assembly (20).

5. The protective panel assembly according to claim 1, wherein one of the plurality of connecting elements (40) is embedded with its second end (42) in a concrete matrix (31) of the inner panel (23) and does not pass through an inner side (26) of the protective panel assembly (20).

6. The protective panel assembly according to claim 1, wherein at least one of the plurality of connecting elements (40) has a connecting web (44) which connects the first end (41) to the second end (42) thereof and completely passes through the intermediate panel (24).

7. The protective panel assembly according to claim 6, wherein the connecting web (44) includes at least one section (44a, 44b) that extends in an inclined manner by an angle of inclination (, 1, 2) relative to a plane (E) that is oriented at a right angle to at least one of the outer panel (22), the intermediate panel (24), or the inner panel (23).

8. The protective panel assembly according to claim 1, wherein the at least one of the plurality of connecting elements (40) has a transverse web (43) at at least one of the first end (41) and the second end (42).

9. The protective panel assembly according to claim 7, wherein the at least one of the plurality of connecting elements (40) has a transverse web (43) at at least one of the first and second ends (41, 42), and the connecting web (44) is configured to be weaker than the transverse web (43).

10. The protective panel assembly according to claim 1, wherein the plurality of connecting elements (40) include at least one first connecting element (40a) and at least one second connecting element (40b) which are arranged in an offset manner with respect to one another in at least one of two spatial directions (x, y) that define a plane arranged parallel to the outer panel (22).

11. The protective panel assembly according to claim 10, wherein the at least one first connecting element (40a) connects the outer panel (22) to the intermediate panel (24), and the at least one second connecting element (40b) connects the intermediate panel (24) to the inner panel (23).

12. The protective panel assembly according to claim 1, wherein the plurality of connecting elements (40) respectively comprise fiber bundles (45) embedded in a synthetic matrix.

13. The protective panel assembly according to claim 1, wherein individual ones of the textile-reinforced concrete panels (21) have at least one textile layer (30) which is formed by a mesh-type fabric composed of fiber bundles (32).

14. The protective panel assembly according to claim 13, wherein the intermediate panel (24) has at least three textile layers (30) including the at least one textile layer which are embedded at a distance from one another in a concrete matrix (31) of the intermediate panel (24).

15. The protective panel assembly according to claim 13, wherein a number of textile layers (30) in the intermediate panel (24) is greater than in the outer panel (22) and/or in the inner panel (23).

16. The protective panel assembly according to claim 1, wherein the intermediate space (57) is filled with a solid filler material (58).

17. The protective panel assembly according to claim 16, wherein the filler material (58) is elastically and/or plastically deformable.

18. A method for repairing a protective panel assembly (20) according to claim 1 which has an impact hole (65) extending into the outer panel, the fiber panel, and the intermediate panel, said method comprising: filling an area of the impact hole (65) in the intermediate panel (24) with a resin (69), inserting a replacement fiber panel piece (70) for the fiber panel (50) into the impact hole (65) in the existing fiber panel (50), filling an area of the impact hole (65) in the outer panel (22) with a body filler (71).

Description

[0032] Advantageous embodiments of the invention will become apparent from the dependent claims, from the description and from the drawings. Preferred exemplary embodiments of the invention will be explained in detail below with reference to the appended drawings. In the drawings:

[0033] FIG. 1 shows a schematic cross-sectional view through one exemplary embodiment of a protective panel assembly,

[0034] FIG. 2 shows a schematic cross-sectional view through a further exemplary embodiment of a protective panel assembly,

[0035] FIG. 3a shows a schematic cross-sectional view through one exemplary embodiment of a fiber panel of the protective panel assembly,

[0036] FIG. 3b shows a schematic illustration of the fibers or fiber bundles of a fiber panel of the protective panel assembly,

[0037] FIG. 4 shows a schematic perspective diagram of the structure of an exemplary connecting element of the protective panel assembly,

[0038] FIG. 5 shows a schematic view of a fiber bundle fabric for incorporation in a concrete matrix of a concrete panel of the protective panel assembly as textile reinforcement,

[0039] FIG. 6 shows a schematic plan view of the outer side of a protective panel assembly,

[0040] FIG. 7 shows a schematic cross-sectional view of a further exemplary embodiment of a protective panel assembly,

[0041] FIG. 8 shows a schematic cross-sectional view of a further exemplary embodiment of a protective panel assembly,

[0042] FIGS. 9-11 show different embodiments of connecting elements for use in the protective panel assembly,

[0043] FIGS. 12-14 each show a schematic cross-sectional view through an exemplary embodiment of a protective panel assembly showing individual steps for repairing an impact hole.

[0044] The invention provides a protective panel assembly 20 for protecting against gunfire and/or explosions. The protective panel assembly 20 has three textile-reinforced concrete panels 21: an outer panel 22, an inner panel 23 and an intermediate panel 24. The concrete panels 21 are oriented substantially parallel to one another. Each concrete panel 21 extends parallel to a panel plane that is defined by an x direction and a y direction of a Cartesian coordinate system. As viewed in a z direction of the Cartesian coordinate system, the intermediate panel 24 is arranged between the outer panel 22 and the inner panel 23. The three textile-reinforced concrete panels 21 do not bear directly against one another but rather are each arranged at a distance from one another in the z direction.

[0045] In the exemplary embodiment, the thickness of the intermediate panel 24 is greater than the thickness of the outer panel 22 and/or of the inner panel 23. Preferably, the thickness of the intermediate panel 24 is at least twice as great as that of the outer panel 22 and/or of the inner panel 23.

[0046] A side of the outer panel 22 facing away from the intermediate panel 24 forms an outer side 25 of the protective panel assembly 20. The inner panel 23 has a side facing away from the intermediate panel 24 that forms an inner side 26 of the protective panel assembly 20. People or equipment to be protected are located behind the inner side 26. Impacting elements, such as fragments, projectiles or the like, impinge on the outer side 25 of the protective panel assembly 20.

[0047] Each textile-reinforced concrete panel 21 has at least one textile layer 30 which is embedded in a concrete matrix 31. If a textile-reinforced concrete panel 21 has more than one textile layer 30, the individual textile layers are arranged at a distance from one another in the z direction. The individual textile layers 30 preferably do not touch one another. As the thickness of a concrete panel 21 in the z direction increases, the number of textile layers 30 increases and preferably increases in a manner proportional to the thickness. In the preferred exemplary embodiment described here, the outer panel 22 and the inner panel 23 each have a single textile layer 30. The number of textile layers 30 of the intermediate panel 24 is for example greater than the number of textile layers of the outer panel 22 and/or of the inner panel 23. In the exemplary embodiments illustrated here, at least three textile layers 30 are embedded in the concrete matrix 31 in the intermediate panel 24.

[0048] The concrete matrix 31 consists of a binder, such as for example cement, and an aggregate. As the aggregate, use may be made for example of gravel and/or sand. The concrete matrix may additionally contain concrete admixtures or concrete additives.

[0049] The structure of a textile layer 30 is illustrated schematically in FIG. 5. The textile layer 30 is formed by fiber bundles 32 arranged in a mesh-like manner. A first group 33 of fiber bundles 32 extends in one direction, for example in the x direction, while a second group 34 of fiber bundles 32 extends in another direction, for example in the y direction. The two groups 33, 34 are placed one on top of the other and thereby form a mesh-type fabric. The fiber bundles 32 run in a substantially rectilinear manner.

[0050] In the exemplary embodiment, substantially rectangular and/or square meshes are formed in the fabric. Alternatively, the meshes could also be diamond-shaped. It is also possible to add at least one further group of fiber bundles 32, so that the fabric consists of three or more groups of fiber bundles 32 arranged one on top of the other. The fiber bundles 32 of a common group 33, 34 extend substantially parallel to one another in each case. At the points of intersection, the intersecting fiber bundles are connected to one another by connecting means, for example by connecting threads or the like. The fabric, which is flexible before being incorporated in the concrete matrix 31, is thus able to be handled and the positioning of the individual fiber bundles 32 is retained.

[0051] Suitable materials for the fibers of the fiber bundles 32 of the textile layer 30 are for example filaments made of glass, carbon, or other filaments suitable for textile concrete.

[0052] Compared to steel concrete, the textile-reinforced concrete panels 21 have a greater degree of ductility and a low weight. Due to this ductility, a breaking of the outer panel 22 by impacting elements takes place only under greater forces or loads compared to steel concrete.

[0053] The three textile-reinforced concrete panels 21 are connected to one another via connecting elements 40. In the exemplary embodiment shown in FIG. 1, all the connecting elements 40 are configured in an identical manner. Each connecting element 40 has a first end 41 and an opposite second end 42. A transverse web 43 is provided at each of the two ends 41, 42. The transverse webs 43 extend in the x direction and in the y direction and may be formed by plate-shaped sections of the connecting element 40. The two transverse webs 43 are connected to one another via a connecting web 44 which extends from the first end 41 to the second end 42. In the exemplary embodiment of the protective panel assembly 20 illustrated in FIG. 1, the connecting web 44 runs parallel to a cross-sectional plane E that is defined by the z direction and the y direction. The two transverse webs 43 extend at right angles thereto.

[0054] A transverse web 43 may extend from the connecting web 44 in the x direction on just one side or on both sides. As a result, it is possible to form for example connecting elements 40 which are U-shaped, J-shaped, C-shaped, T-shaped or double-T-shaped as seen in cross-section.

[0055] The connecting elements 40 pass through neither the outer side 25 nor the inner side 26 of the protective panel assembly 20.

[0056] The structure of an exemplary connecting element 40 is illustrated schematically in FIG. 4. The connecting element 40 is formed of fiber bundles 45 embedded in a synthetic matrix. In FIG. 4, the fiber bundles 45 are each illustrated by a line. In a manner analogous to the mesh-type fabric of a textile layer 30, the fiber bundles 45 in each case form at least two groups which are placed one on top of the other in different directions in order to form the mesh structure. Fiber bundles 45 thus arranged in the form of a mesh are embedded in a synthetic matrix and brought into the desired shape. In doing so, a plurality of mesh parts 46 may be formed and may be connected to one another by means of the synthetic matrix, as illustrated schematically in FIG. 4. As shown in FIG. 4, the two mesh parts 46 have sections arranged parallel to one another, which sections are placed one on top of the other and are connected via the synthetic matrix. In the exemplary embodiment, these sections form the connecting web 44. Sections of each mesh part 46 which are angled away therefrom form the transverse webs 43 at the first end 41 and/or at the second end 42. In order to achieve the desired shape of the connecting element 40, the mesh parts 46 which are connected to one another may also have other shapes differing from FIG. 4.

[0057] The fiber bundles 45 of the connecting element 40 may be formed for example by glass fibers. Preferably, the fiber bundles 45 are incorporated in a matrix of epoxy resin or are impregnated in an epoxy resin. The epoxy resin also serves as a connecting means for connecting a plurality of mesh parts 46 in a materially bonded manner.

[0058] As a modification to the described exemplary embodiment, it is also possible that a connecting element 40 is formed of a single mesh part 46.

[0059] At least one fiber panel 50 is arranged between the outer panel 22 and the intermediate panel 24. The at least one fiber panel 50 bears for example with one side against the outer panel 22 and with the opposite side against the intermediate panel 24 and/or is connected to the outer panel 22 and/or to the intermediate panel 24. By way of example, the at least one fiber panel 50 may be connected to the respective concrete panel 21 through contact with the concrete matrix 31 of the outer panel 22 and/or of the intermediate panel 24 and subsequent curing of the concrete matrix 31.

[0060] If a plurality of fiber panels 50 are provided, these extend next to one another in a common plane and are not offset from one another in the z direction. In the exemplary embodiment, the connecting elements 40 do not pass through the at least one fiber panel 50. The connecting elements 40 extend past the at least one fiber panel 50. Alternatively, it is also possible to provide a corresponding cutout in a fiber panel 50 for the passage of the respective connecting element 40. A further possibility lies in providing a cutout for the connecting web 44 in the edge of a fiber panel 50, so that immediately adjacent fiber panels 50 can bear directly against one another at the locations at which no connecting web 44 and no connecting element 40 are present.

[0061] As can be seen schematically in FIG. 6, the connecting elements 40 do not extend over the entire dimension of the protective panel assembly 20 in the x direction and in the y direction. Two adjacently arranged fiber panels 50 can therefore bear against one another next to the connecting elements 40, as viewed in the y direction. A corresponding cutout may be provided in one or in both adjacent fiber panels 50 in the region of the connecting web 44. The number of fiber panels 50 may vary depending on the number of connecting elements 40 used and on the position thereof. Three fiber panels arranged next to one another in the x direction are illustrated in FIG. 6, with a respective connecting element 40 or connecting web 44 extending through between said fiber panels.

[0062] The at least one fiber panel 50 comprises synthetic fiber bundles 51 which are connected to one another and in particular are connected to one another by weaving, said synthetic fiber bundles being made of glass fibers and/or aramid fibers. The connection by weaving can be selected at will. A fabric 52 which has for example a plain weave is illustrated in FIG. 3b. The fabric 52 composed of synthetic fiber bundles 51 is embedded in a synthetic matrix 53 of the fiber panel 50 (FIG. 3a). For the fiber panel 50, it is essential that the synthetic fibers or synthetic fiber bundles 51 bear very tightly against one another and no intermediate spaces or only very small intermediate spaces remain. An epoxy resin is preferably used as the synthetic matrix 53. The synthetic fiber bundles 51 and for example the aramid fiber bundles or glass fiber bundles are protected by way of the synthetic matrix 53 against destruction of or damage to the adjacent concrete panels 21 caused by the alkaline concrete matrix 31.

[0063] An intermediate space 57 is formed between the intermediate panel 24 and the inner panel 23. In the z direction, the inner panel 23 is arranged at a distance from the intermediate panel 24. At least some of the provided connecting elements 40 pass through this intermediate space 57. Apart from that, the intermediate space 57 can be filled with air (FIG. 2) and/or a solid and preferably sheet-like or mat-like filler material 58 (for example FIG. 1). The filler material 58 is elastically and/or plastically deformable and in particular is much easier to deform than all the other panels 21, 50 of the protective panel assembly 20. Suitable filler materials are for example the insulating materials that are usually used. As the filler material 58, use may be made for example of polystyrene sheets, natural and/or synthetic fiber mats, mineral wool mats, etc. In principle, it is alternatively also possible to use loose bulk material as the filler material 58. However, cohesive sheets or mats which form the filler material 58 are easier to handle during production and are therefore preferred.

[0064] The protective panel assembly 20 described above and shown in FIGS. 1 and 2 acts as follows:

[0065] When an impacting element impinges on the outer side 25, the impacting element is first deformed by the outer panel 22, as a result of which the kinetic energy is reduced. The impacting element may completely pass through the outer panel 22 and may impinge on the fiber panel 50. There, the impacting element deforms the aramid or glass fibers, as a result of which the kinetic energy is reduced through stretching and deformation of the fibers of the synthetic fiber bundles 51. The fiber panel 50 is damaged and/or deformed in the area of the impact hole. The impacting element may penetrate into the intermediate panel 24. As a result of this impact in the intermediate panel 24, concrete parts may spall on the side of the intermediate panel 24 facing toward the inner panel 23. Such a spalled concrete part may enter the intermediate space 57 or pass through the latter and impinge on the inner panel 23. Due to the size, shape and reduced energy of such a spalled concrete part, damage may possibly still occur on the side of the inner panel 23 facing toward the intermediate space 57 but the impact energy is not sufficient for concrete parts to be thrown onto the inner side 26 of the protective panel assembly 20, which could injure or damage people or equipment.

[0066] In the exemplary embodiments in FIGS. 1 and 2, a connecting element 40 connects all three textile-reinforced concrete panels 21 to one another. As a modification thereto, it is provided in the exemplary embodiment illustrated in FIG. 7 that the connecting elements 40 are subdivided into a group of first connecting elements 40a and a group of second connecting elements 40b. By way of example, the first and second connecting elements 40a, 40b are U-shaped or bracket-shaped as seen in cross-section. The first end 41 of the first connecting elements 40a is embedded in the concrete matrix 31 of the outer panel 22, and the second end 42 of said first connecting elements 40a is embedded in the concrete matrix 30 of the intermediate panel 24. In contrast, the first end 41 of the second connecting elements 40 is embedded in the concrete matrix 31 of the intermediate panel 24, and the second end 42 is embedded in the concrete matrix 31 of the inner panel 23. Therefore, the first connecting elements 40a connect the outer panel 22 to the intermediate panel 24, and the second connecting elements 40b connect the intermediate panel 24 to the inner panel 23. The second connecting elements 40b are offset from the first connecting elements 40a in the x direction and/or y direction. As a result, the connecting webs 44 of the first connecting elements 40a are not aligned with the connecting webs 44 of the second connecting elements 40b. A force or pressure wave acting on the outer side 25 will thus not be conducted via the connecting elements 40a, 40b and in particular the connecting webs 44 into the inner panel 23. The risk that concrete parts may spall on the inner side 26 and may injure or damage people or equipment is thereby further reduced.

[0067] The design or shape of the first and second connecting elements 40a, 40b in FIG. 7 may also correspond to the connecting elements 40 shown in FIGS. 1 and 2. Other embodiments of the first and second connecting elements 40a, 40b are also possible, as has been explained above. The structure of the protective panel assembly 20 shown in FIG. 7 otherwise corresponds to the structure of the exemplary embodiments explained above.

[0068] A further modified embodiment of the protective panel assembly 20 with altered connecting elements 40 is illustrated in FIG. 8. Apart from the connecting elements 40, this exemplary embodiment corresponds to the embodiment shown in FIG. 1 or 2. The difference of the exemplary embodiment shown in FIG. 8 from FIGS. 1 and 2 lies in the fact that the connecting webs 44 of the connecting elements 40 run obliquely or in an inclined manner relative to the cross-sectional plane E, which is oriented at right angles to the X direction and thus passes through the panels 21, 50 of the protective panel assembly 20 at right angles. An angle of inclination relative to the cross-sectional plane E is in this case greater than 0 degrees and less than 90 degrees and in particular less than 80 degrees or less than 70 degrees. The angle of inclination is preferably at least 10 degrees or 15 degrees or 25 degrees. A force Fz acting along the cross-sectional plane E or in the z direction in the region of the connecting web 44 on the first end 41 is thereby transmitted only partially along the connecting web 44 to the inner panel 23. A smaller longitudinal force Fs acts along the connecting web 44, and in addition a transverse force Fq acts at right angles to the connecting web 44. The vector breakdown of the forces is illustrated schematically in FIG. 9. As a result, the force transmission through the connecting web 44 between the first end 41 and the second end 42 can be reduced. The greater the angle of inclination , the smaller the magnitude of the longitudinal force Fs. The magnitude of the transverse force Fq is less relevant since this transverse force Fq does not lead to spalling on the inner side 26 of the protective panel assembly 20.

[0069] As shown in FIGS. 8 and 9, the entire connecting web 44 extends in a correspondingly inclined plane from the first end 41 to the second end 42. As an alternative, it is also possible to incline just one section of the connecting web 44 at an angle of inclination relative to the cross-sectional plane E. A further possibility lies in providing a plurality of differently inclined sections of the connecting web 44, as illustrated schematically in FIG. 11. In said figure, a first section 44a of the connecting web 44 is inclined at a first angle of inclination 1 and a second section 44b of the connecting web 44 is inclined at a second angle of inclination 2 relative to the cross-sectional plane E. The two sections 44a, 44b form a kink 62. More than two sections could also adjoin one another in a concertina-like or zigzag-like manner between the transverse web 43 at the first end 41 and the transverse web 43 at the second end 42. The values of the first angle of inclination 1 and of the second angle of inclination 2 may be identical or different.

[0070] FIGS. 10 and 11 show an alternative or further possibility of reducing the maximum force that can be transmitted from the first end 41 to the second end 42, by reducing the stability of the connecting web 44. This can be achieved for example in that the wall thickness ws of the connecting web 44 is smaller at least in some regions than the maximum wall thickness wq of the transverse webs 43. In addition or as an alternative, the weakening of the connecting web 44 can also be achieved by reducing the density of the fiber bundles 45 or fibers within the fiber bundles 45 compared to the other parts of the connecting element 40.

[0071] Based on the exemplary embodiment of the protective panel assembly 20 shown in FIG. 1, FIGS. 12-14 illustrate an exemplary embodiment of a method for repairing an impact hole 65.

[0072] FIG. 12 shows the impact hole 65 following the impact of an element, for example a projectile 66. The projectile 66 has stretched individual filaments 67 of the synthetic fiber bundles 51 out of the fiber panel 50 and has moved them into the intermediate panel 24 in an area of the impact hole 65. On the side of the intermediate panel 24 facing toward the intermediate space 57, a part 68 has spalled in the direction of impact and has deformed the filler material 58 in the intermediate space 57. For repair purposes, the procedure is as follows:

[0073] First, the area of the impact hole 65 located in the intermediate panel 24 is filled with a resin 69 by pressing in the resin 69. A replacement piece 70 which has been cut to fit is then used for the fiber panel 50. The replacement piece 70 comprises synthetic fibers embedded in a synthetic matrix and preferably has the same structure as the fiber panel 50. The replacement piece 70 can be taken from a replacement fiber panel by cutting out a suitable piece and can be applied to the part of the fiber panel 50 that is arranged within the impact hole 65. The resin 69 or another connecting means can be used to connect the replacement piece 70 to the fiber panel 50. These repair steps are illustrated schematically in FIG. 13.

[0074] Finally, the area of the impact hole 65 in the outer panel 22 is filled with a body filler 71 and is made substantially level with the outer surface 25 (FIG. 14).

[0075] The invention relates to a protective panel assembly 20 and to a method for repairing an impact hole 65 in the protective panel assembly 20. The protective panel assembly 20 has three textile-reinforced concrete panels 21 which are connected to one another via connecting elements 40 to form a unit. The textile-reinforced concrete panels 21 form an outer panel 22, an inner panel 23 and an intermediate panel 24. Arranged between the outer panel 22 and the intermediate panel 24 is at least one fiber panel 50 comprising fiber bundles 51 of glass and/or aramid fibers incorporated in a synthetic matrix 53. An intermediate space 57 exists between the intermediate panel 24 and the inner panel 23. The intermediate space 57 can be filled with air and/or a solid filler material 58 which can be plastically and/or elastically deformed. Additional panels or layers can be omitted.

LIST OF REFERENCE SIGNS

[0076] 20 protective panel assembly [0077] 21 textile-reinforced concrete panel [0078] 22 outer panel [0079] 23 inner panel [0080] 24 intermediate panel [0081] 25 outer side [0082] 26 inner side [0083] 30 textile layer [0084] 31 concrete matrix [0085] 32 fiber bundle [0086] 33 first group [0087] 34 second group [0088] 40 connecting element [0089] 40a first connecting element [0090] 40b second connecting element [0091] 41 first end [0092] 42 second end [0093] 43 transverse web [0094] 44 connecting web [0095] 44a first section of the connecting web [0096] 44b second section of the connecting web [0097] 45 fiber bundle [0098] 46 mesh part [0099] 50 fiber panel [0100] 51 synthetic fiber bundle [0101] 52 fabric [0102] 53 synthetic matrix [0103] 57 intermediate space [0104] 58 filler material [0105] 62 kink [0106] 65 impact hole [0107] 66 projectile [0108] 67 synthetic fiber [0109] 68 part of the concrete matrix [0110] 69 resin [0111] 70 replacement piece [0112] 71 body filler [0113] angle of inclination [0114] 1 first angle of inclination [0115] 2 second angle of inclination [0116] E plane [0117] Fz acting force [0118] Fq transverse force [0119] Fs longitudinal force [0120] wq maximum wall thickness of the transverse webs [0121] ws wall thickness of the connecting web [0122] x x direction [0123] y y direction [0124] z z direction