Bed board

Abstract

To provide a floor slab capable of transmitting shearing force further effectively.SOLUTION: A floor slab according to one embodiment is a floor slab 70 extending in a bridge-axis direction D1, a bridge-axis-orthogonal direction D2 orthogonal to the bridge-axis direction D1, and a height direction D3 orthogonal to both the bridge-axis direction D1 and the bridge-axis-orthogonal direction D2. The floor slab 70 has an end face 73 facing another floor slab, and a plurality of convex parts 74 projecting toward the other floor slab is arranged on the end face 73. At least one face of each convex part 74 is an inclined surface 78 inclined with respect to the bridge-axis direction D1, the bridge-axis-perpendicular direction D2, and the height direction D3, an inclined surface 78 of one convex part 74 is inclined so as to approach or separate from the other convex part 74 from one side to the other side in the height direction D3.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present disclosure relates to a floor slab.

Background Art

[0002] Japanese Patent Application Laid-Open No. 2020-186614 describes a connection structure of precast floor slabs and a construction method of the connection part. In the connection structure of the precast floor slabs, a plurality of precast floor slabs are installed on the upper part of the bridge girder. Each precast floor slab has a connection end portion facing another precast floor slab.

[0003] Joint bars are provided at the connection end portion, and further, a notch recess having a predetermined height is formed at the top end portion of the connection end portion. A connection top member is installed in the pair of notch recesses of the pair of precast floor slabs. Further, each connection end portion has an uneven surface, and a packing hardening material is filled between the uneven surfaces of the pair of connection end portions. This uneven surface is uneven in side view.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the above-described precast floor slab, a shear force can be transmitted in the height direction between each of the pair of precast floor slabs and the packing material. However, since a shear force may not be transmitted in a direction other than the height direction, there is room for improvement in terms of the transmission of the shear force. Therefore, it is required to be able to transmit the shear force more effectively.

[0006] An object of the present disclosure is to provide a floor slab capable of more effectively transmitting a shear force.

Means for Solving the Problems

[0007] The floor slab according to the present disclosure is a floor slab extending in the bridge axis direction, the bridge axis perpendicular direction orthogonal to the bridge axis direction, and the height direction orthogonal to both the bridge axis direction and the bridge axis perpendicular direction. The floor slab has an end face facing another floor slab, and a plurality of convex portions protruding toward the other floor slab are arranged on the end face. At least one surface of each convex portion is an inclined surface inclined with respect to the bridge axis direction, the bridge axis perpendicular direction, and the height direction. The inclined surface of one convex portion is inclined so as to approach or separate from another convex portion as it goes from one side to the other side in the height direction and the convex portion has a plurality of inclined surfaces that are inclined with respect to the top surface, the bridge axis direction, the direction perpendicular to the bridge axis, and the height direction, and the top surface has a portion where the horizontal length of the top surface becomes longer as it goes from one side to the other side in the height direction of the end surface .

[0008] This floor slab has an end face facing another floor slab, and convex portions protruding toward the other floor slab are formed on this end face. Therefore, after a packing material is filled between this floor slab and the other floor slab, the shear force acting between each floor slab and the packing material can be transmitted, so that the shear strength can be increased. Further, the convex portions formed on the end face facing another floor slab have inclined surfaces inclined with respect to the bridge axis direction, the bridge axis perpendicular direction, and the height direction. This inclined surface is inclined so as to approach or separate from another convex portion as it goes from one side to the other side in the height direction. Therefore, the shear force can be transmitted in three directions, namely, the bridge axis direction, the bridge axis perpendicular direction, and the height direction, between the floor slab and the packing material through this inclined surface, so that the shear force can be transmitted more effectively.

[0009] In the above-described floor slab, the convex portion forming the side surface of the convex portion has a plurality of inclined surfaces, and the plurality of inclined surfaces include a first inclined surface located on one side in the height direction and a second inclined surface located on the other side in the height direction, and the first inclined surface and the second inclined surface may be arranged side by side in the height direction. The first inclined surface faces one of diagonally downward and diagonally upward, and the second inclined surface may face the other of diagonally downward and diagonally upward. In this case, when the floor slab receives a downward shear force with respect to the packing material and when the packing material receives a downward shear force with respect to the floor slab, the shear force can be transmitted in three directions through either the first inclined surface or the second inclined surface. Therefore, the transmission of the shear force between the floor slab and the packing material can be made more effective.

[0010] The floor slab described above may be provided with reinforcing bars protruding from the convex portions. In this case, compared with a floor slab provided with reinforcing bars protruding from portions other than the convex portions, the formwork used in manufacturing the floor slab can be easily removed. Therefore, the floor slab can be easily manufactured.

Effects of the Invention

[0011] According to the present disclosure, shear force can be transmitted more effectively.

Brief Description of the Drawings

[0012] [Fig. 1] It is a side sectional view showing a joining structure according to the first embodiment. [Fig. 2] It is a plan view showing the joining structure of FIG. 1. [Fig. 3] It is a perspective view schematically showing a continuous fiber reinforcing material. [Fig. 4] It is a side sectional view showing a joining structure according to the second embodiment. [Fig. 5] It is a plan view showing the joining structure of FIG. 4. [Fig. 6] It is a perspective view showing a floor slab according to the third embodiment. [Fig. 7] It is a plan view showing the floor slab of FIG. 6. [Fig. 8] It is a side view showing an end face of the floor slab of FIG. 6. [Fig. 9] It is a perspective view showing a floor slab according to the fourth embodiment. [Fig. 10] It is a plan view showing the floor slab of FIG. 9.

Modes for Carrying Out the Invention

[0013] Hereinafter, embodiments of a floor slab and a joining structure of the floor slab according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant descriptions are appropriately omitted. Also, the drawings may be drawn with some parts simplified or exaggerated for ease of understanding, and the dimensional ratios and the like are not limited to those shown in the drawings.

[0014] (First Embodiment) FIG. 1 is a cross-sectional view showing a joining structure 1 according to the first embodiment. FIG. 2 is a plan view showing the joining structure 1. As shown in FIGS. 1 and 2, the joining structure 1 includes a first floor slab 10, a second floor slab 20 provided at a position separated from the first floor slab 10, and a filling material 30 filled between the first floor slab 10 and the second floor slab 20.

[0015] The first floor slab 10, the second floor slab 20, and the filling material 30 constitute, for example, a bridge. As an example, the bridge is a highway bridge. The bridge includes, for example, a plurality of girders extending in the bridge axis direction D1 and a plurality of support members extending in the direction perpendicular to the bridge axis D2 between the plurality of girders. The first floor slab 10 and the second floor slab 20 are arranged on the plurality of girders so as to extend in the bridge axis direction D1 and the direction perpendicular to the bridge axis D2. The direction perpendicular to the bridge axis D2 is orthogonal to the bridge axis direction D1.

[0016] Each of the first floor slab 10 and the second floor slab 20 is, for example, a precast concrete floor slab manufactured in a factory in advance. Each of the first floor slab 10 and the second floor slab 20 is, for example, a UFC floor slab having no reinforcing bars and composed of ultra-high strength fiber-reinforced concrete (UFC). Further, the first floor slab 10 and the second floor slab 20 may be composed of ultra-high performance fiber-reinforced cementitious composite (UHPFRC).

[0017] The first floor slab 10 has an upper surface 11 extending in the bridge axis direction D1 and the direction perpendicular to the bridge axis D2, a lower surface 12 extending in the bridge axis direction D1 and the direction perpendicular to the bridge axis D2 on the side opposite to the upper surface 11 of the first floor slab 10, and a first end surface 13 extending in the direction perpendicular to the bridge axis D2 and the height direction D3. The height direction D3 coincides with the thickness direction of the first floor slab 10 and the second floor slab 20.

[0018] Each of the upper surface 11 and the lower surface 12 is, for example, flat. The first end face 13 has a first convex portion 14 protruding toward the second floor slab 20 and a first concave portion 15 recessed in a direction away from the second floor slab 20. The first end face 13 has, for example, a plurality of first convex portions 14. The first convex portion 14 protrudes in a side view (when viewed along the horizontal direction), and the first concave portion 15 is recessed in a side view. The first convex portion 14 and the first concave portion 15 are arranged along the height direction D3.

[0019] The first convex portion 14 has, for example, a trapezoidal shape having a top surface 14b and a pair of inclined surfaces 14c respectively located on both sides of the height direction D3 when viewed from the top surface 14b. The first concave portion 15 has, for example, a trapezoidal shape having a bottom surface 15b and a pair of inclined surfaces 15c respectively located on both sides of the height direction D3 when viewed from the bottom surface 15b. Each inclined surface 15c is provided on an extension (in the same plane) of the inclined surface 14c.

[0020] The configuration of the second floor slab 20 is, for example, the same as the configuration of the first floor slab 10. The second floor slab 20 has an upper surface 21, a lower surface 22, and a second end face 23 facing the first end face 13 in the bridge axis direction D1. The second end face 23 has a second convex portion 24 protruding toward the first floor slab 10 and a second concave portion 25 recessed in a direction away from the first floor slab 10.

[0021] For example, the second convex portion 24 protrudes in a side view, and the second concave portion 25 is recessed in a side view. The second convex portion 24 has, for example, a top surface 24b and a pair of inclined surfaces 24c respectively located on both sides of the height direction D3 when viewed from the top surface 24b, and the second concave portion 25 has a bottom surface 25b and a pair of inclined surfaces 25c respectively located on both sides of the height direction D3 when viewed from the bottom surface 25b.

[0022] For example, in the joint structure 1, the top surface 14b of the first convex portion 14 and the top surface 24b of the second convex portion 24 face each other in the bridge axis direction D1, and the bottom surface 15b of the first concave portion 15 and the bottom surface 25b of the second concave portion 25 face each other in the bridge axis direction D1, so that the first floor slab 10 and the second floor slab 20 are installed. However, in the joint structure, the first floor slab 10 and the second floor slab 20 may be installed such that the top surface 14b of the first convex portion 14 and the bottom surface 25b of the second concave portion 25 face each other in the bridge axis direction D1, and the bottom surface 15b of the first concave portion 15 and the top surface 24b of the second convex portion 24 face each other in the bridge axis direction D1.

[0023] In addition, in the above description, an example in which the first convex portion 14 has a trapezoidal shape having a top surface 14b and a pair of inclined surfaces 14c, and the first concave portion 15 has a trapezoidal shape having a bottom surface 15b and a pair of inclined surfaces 15c has been described. However, the first convex portion 14 and the first concave portion 15 may have a shape other than a trapezoidal shape. For example, the first convex portion may have a rectangular shape having a top surface, an upper surface, and a lower surface, and the first concave portion may have a rectangular shape having a bottom surface, an upper surface, and a lower surface. The same applies to the second convex portion 24 and the second concave portion 25.

[0024] For example, the filler 30 is a cementitious material that has fluidity during filling and hardens after a certain period of time has elapsed since filling. The filler 30 may be non-shrinking mortar, or may be placed UFC, or UHPFRC, and various materials can be used as the filler 30.

[0025] The first floor slab 10 has a first continuous fiber reinforcing material 16 that protrudes from the first end face 13 toward the second floor slab 20. The first continuous fiber reinforcing material 16 extends, for example, along the bridge axis direction D1. A part of the first continuous fiber reinforcing material 16 is embedded in the first floor slab 10, and the depth (length in the bridge axis direction D1) of the portion of the first continuous fiber reinforcing material 16 embedded in the first floor slab 10 is equal to or greater than the length at which the concrete of the first floor slab 10 can be fixed. For example, the first floor slab 10 has a plurality of first continuous fiber reinforcing materials 16, and the plurality of first continuous fiber reinforcing materials 16 are arranged along the height direction D3. Further, the plurality of first continuous fiber reinforcing materials 16 are arranged along the direction D2 perpendicular to the bridge axis.

[0026] For example, the first continuous fiber reinforcing material 16 protrudes from the first convex portion 14 (for example, the top surface 14b of the first convex portion 14). However, the first continuous fiber reinforcing material 16 may protrude from the inclined surface 14c (or the inclined surface 15c), or may protrude from the first concave portion 15 (for example, the bottom surface 15b of the first concave portion 15). Thus, the location where the first continuous fiber reinforcing material 16 protrudes is not particularly limited.

[0027] Similar to the first floor slab 10, the second floor slab 20 has a second continuous fiber reinforcing material 26 that protrudes from the second end face 23 toward the first floor slab 10. A part of the second continuous fiber reinforcing material 26 is embedded in the second floor slab 20, and the depth of the part of the second continuous fiber reinforcing material 26 embedded in the second floor slab 20 is equal to or greater than the length that the concrete of the second floor slab 20 can be fixed. The second floor slab 20 has a plurality of second continuous fiber reinforcing materials 26, and the plurality of second continuous fiber reinforcing materials 26 are arranged along the bridge axis perpendicular direction D2 and the height direction D3, respectively.

[0028] For example, the second continuous fiber reinforcing material 26 protrudes from the second convex portion 24 (for example, the top surface 24b of the second convex portion 24). However, similar to the first continuous fiber reinforcing material 16, the location where the second continuous fiber reinforcing material 26 protrudes is not particularly limited. For example, the position of the second continuous fiber reinforcing material 26 in the height direction D3 is the same as the position of the first continuous fiber reinforcing material 16 in the height direction D3.

[0029] For example, in a plan view (when viewed along the height direction D3), the first continuous fiber reinforcing material 16 and the second continuous fiber reinforcing material 26 are alternately arranged along the bridge axis perpendicular direction D2. However, the positions of the first continuous fiber reinforcing material 16 and the second continuous fiber reinforcing material 26 are not limited to the above example and can be changed as appropriate. Also, the configuration of the first continuous fiber reinforcing material 16 is, for example, the same as the configuration of the second continuous fiber reinforcing material 26. Therefore, hereinafter, when it is not necessary to distinguish between the first continuous fiber reinforcing material 16 and the second continuous fiber reinforcing material 26, the first continuous fiber reinforcing material 16 and the second continuous fiber reinforcing material 26 will be collectively described as the continuous fiber reinforcing material 6.

[0030] FIG. 3 is a perspective view schematically showing the continuous fiber reinforcing material 6. As shown in FIG. 3, the continuous fiber reinforcing material 6 is, for example, a continuous fiber reinforced twisted yarn. That is, the continuous fiber reinforcing material 6 is in a state in which a plurality of strands 7 formed by bundling continuous fibers are twisted together and solidified by a resin. The continuous fiber reinforcing material 6 has higher rust prevention properties than reinforcing bars and is composed of a material with higher corrosion resistance than iron.

[0031] The continuous fiber reinforcing material 6 is, for example, a carbon fiber rod. As an example, the continuous fiber reinforcing material 6 includes a plurality of strands 7, and the plurality of strands 7 are formed by being spirally twisted together. The strand 7 is composed of a resin. The strand 7 is, for example, composed of a matrix resin. The matrix resin is, for example, an epoxy resin, a vinyl ester resin, or the like. The strand 7 may be reinforced by, for example, carbon fiber, aramid fiber, basalt fiber, or glass fiber.

[0032] Next, the effects obtained from the joining structure 1 according to the present embodiment will be described. As shown in FIGS. 1 and 2, in the joining structure 1, the first floor slab 10 has a first end face 13 facing the second floor slab 20, the second floor slab 20 has a second end face 23 facing the first floor slab 10, and a filler 30 is filled between the first end face 13 and the second end face 23. The first floor slab 10 has a first continuous fiber reinforcing material 16 protruding from the first end face 13, and the second floor slab 20 has a second continuous fiber reinforcing material 26 protruding from the second end face 23. Therefore, since the first continuous fiber reinforcing material 16 and the second continuous fiber reinforcing material 26, which are less likely to rust instead of reinforcing bars, protrude from the first end face 13 and the second end face 23, respectively, the possibility of corrosion can be reduced. Thus, corrosion of the members constituting the first floor slab 10 and the second floor slab 20 can be more reliably suppressed, and the reliability of corrosion prevention can be enhanced.

[0033] Furthermore, on the first end face 13, a first convex portion 14 protruding toward the second floor slab 20 and a first concave portion 15 recessed in a direction away from the second floor slab 20 are formed. On the second end face 23, a second convex portion 24 protruding toward the first floor slab 10 and a second concave portion 25 recessed in a direction away from the first floor slab 10 are formed. For example, each of the first convex portion 14 and the second convex portion 24 protrudes in a side view, and each of the first concave portion 15 and the second concave portion 25 is recessed in a side view. Therefore, the shear force in the height direction D3 acting between each of the first floor slab 10 and the second floor slab 20 and the packing member 30 can be transmitted more effectively, so that the shear strength can be increased.

[0034] In the present embodiment, the first floor slab 10 and the second floor slab 20 do not have reinforcing bars and are composed of ultra-high strength fiber reinforced concrete. Therefore, since the first floor slab 10 and the second floor slab 20 do not have reinforcing bars, corrosion of the members constituting the first floor slab 10 and the second floor slab 20 can be more reliably avoided. Furthermore, since the first floor slab 10 and the second floor slab 20 do not have reinforcing bars and are composed of ultra-high strength fiber reinforced concrete, the first floor slab 10 and the second floor slab 20 can be made thinner while maintaining high strength.

[0035] In the present embodiment, the packing member 30 is composed of ultra-high strength fiber reinforced concrete. Therefore, the distance between the first end face 13 and the second end face 23 can be shortened while maintaining high strength, and the reinforcing bars arranged between the first end face 13 and the second end face 23 can be made unnecessary.

[0036] (Second Embodiment) Next, the joint structure 41 according to the second embodiment will be described with reference to FIGS. 4 and 5. A part of the configuration of the joint structure 41 is the same as a part of the configuration of the joint structure 1 described above. Therefore, in the following description, descriptions overlapping with the description of the joint structure 1 will be omitted as appropriate with the same reference numerals. The joint structure 41 includes a support member 42 extending in the bridge axis direction D1, a first floor slab 50 and a second floor slab 60 arranged side by side in a direction perpendicular to the bridge axis D2 on the support member 42, and a packing member 30 filled between the first floor slab 50 and the second floor slab 60.

[0037] The support member 42 is, for example, a steel girder having an upper flange 42b, a web 42c, and a lower flange 42d. However, the support member 42 is not limited to a steel girder and may be, for example, a PC girder. The joining structure 41 is provided at Site A, and as an example, Site A is a construction site on a highway. For example, at Site A, renewal work of the floor slabs including the first floor slab 50 and the second floor slab 60 is carried out.

[0038] For example, the first floor slab 50 and the second floor slab 60 have a short side extending in the bridge axis direction D1 and a long side extending in the direction perpendicular to the bridge axis D2, and exhibit a rectangular plate shape having a thickness in the height direction D3. The first floor slab 50 and the second floor slab 60 are, for example, UFC floor slabs composed of ultra-high-strength fiber-reinforced concrete, similar to the aforementioned first floor slab 10 and second floor slab 20. The materials of the first floor slab 50 and the second floor slab 60 are, for example, the same as the materials of the first floor slab 10 and the second floor slab 20.

[0039] The first floor slab 50 has an upper surface 51 extending in the bridge axis direction D1 and the direction perpendicular to the bridge axis D2, a lower surface 52 extending in the bridge axis direction D1 and the direction perpendicular to the bridge axis D2 on the side opposite to the upper surface 51 of the first floor slab 50, and a first end surface 53 extending in the bridge axis direction D1 and the height direction D3. The first end surface 53 has a first convex portion 54 protruding toward the second floor slab 20 and a first concave portion 55 recessed in a direction away from the second floor slab 60.

[0040] The first convex portion 54 protrudes in plan view, and the first concave portion 55 is recessed in plan view. The first convex portion 54 and the first concave portion 55 are arranged along the bridge axis direction D1. The respective shapes of the first convex portion 54 and the first concave portion 55 are, for example, the same as the respective shapes of the aforementioned first convex portion 14 and first concave portion 15. Therefore, a detailed description of the shapes of the first convex portion 54 and the first concave portion 55 is omitted.

[0041] The configuration of the second bed plate 60 is, for example, the same as that of the first bed plate 50. The second bed plate 60 has an upper surface 61, a lower surface 62, and a second end surface 63 that faces the first end surface 53 in a direction D2 perpendicular to the bridge axis. The second end surface 63 has a second convex portion 64 that protrudes toward the first bed plate 50 and a second concave portion 65 that is recessed in a direction away from the first bed plate 50.

[0042] The second convex portion 64 protrudes in plan view, and the second concave portion 65 is recessed in plan view. The shape and arrangement pattern of each of the second convex portion 64 and the second concave portion 65 are, for example, the same as the shape and arrangement pattern of each of the second convex portion 24 and the second concave portion 25 described above. Therefore, a detailed description of the shape and arrangement pattern of the second convex portion 64 and the second concave portion 65 is omitted.

[0043] Similar to the first bed plate 10 described above, the first bed plate 50 has a first continuous fiber reinforcing material 16 that protrudes from the first end surface 53 toward the second bed plate 60. Similar to the second bed plate 20 described above, the second bed plate 60 has a second continuous fiber reinforcing material 26 that protrudes from the second end surface 63 toward the first bed plate 50.

[0044] In the first bed plate 50, a plurality of first continuous fiber reinforcing materials 16 are arranged along each of the bridge axis direction D1 and the height direction D3. Similarly, in the second bed plate 60, a plurality of second continuous fiber reinforcing materials 26 are arranged along each of the bridge axis direction D1 and the height direction D3. In the joining structure 41, in plan view, the first continuous fiber reinforcing material 16 and the second continuous fiber reinforcing material 26 are arranged alternately.

[0045] The joining structure 41 includes a displacement preventing member 43 that enters between the first bed plate 50 and the second bed plate 60. The displacement preventing member 43 is, for example, a stud gib (stud with head). The displacement preventing member 43 has, for example, a fixing portion 43b fixed to the upper flange 42b of the support member 42 and a rod-shaped portion 43c that extends in a rod shape along the height direction D3 from the fixing portion 43b.

[0046] For example, the joint structure 41 has a plurality of anti-shift members 43, and the plurality of anti-shift members 43 are arranged along the bridge axis direction D1. For example, the plurality of anti-shift members 43 are arranged along the direction D2 perpendicular to the bridge axis. In the joint structure 41, the anti-shift member 43 and the filler 30 are integrated, and the filler 30 is integrated with each of the first floor slab 50 and the second floor slab 60.

[0047] As described above, the joint structure 41 according to the second embodiment includes a support member 42 that supports the first floor slab 50 and the second floor slab 60. The first floor slab 50 and the second floor slab 60 face each other along the direction D2 perpendicular to the bridge axis above the support member 42. Each of the first convex portion 54 and the second convex portion 64 protrudes in plan view, and each of the first concave portion 55 and the second concave portion 65 is recessed in plan view.

[0048] As described above, when the first floor slab 50 and the second floor slab 60 face each other along the direction D2 perpendicular to the bridge axis on the support member 42, and the joint portion of the first floor slab 50 and the second floor slab 60 is located on the support member 42, negative bending that causes upper edge tension may act on the joint portion. In contrast, in the second embodiment, since the first continuous fiber reinforcing material 16 and the second continuous fiber reinforcing material 26 are fixed to the first floor slab 50, the second floor slab 60, and the filler 30, the above negative bending can be resisted. Further, the first convex portion 54 and the second convex portion 64 protrude in plan view, and the first concave portion 55 and the second concave portion 65 are recessed in plan view. That is, in the joint structure 41, since the first end face 53 and the second end face 63 exhibit an uneven shape in plan view, the horizontal shear force can be more effectively transmitted between each of the first floor slab 50 and the second floor slab 60 and the filler 30.

[0049] The joining structure 41 includes a support member 42 that supports the first floor slab 50 and the second floor slab 60, and a displacement preventing member 43 that protrudes upward from the support member 42 and enters between the first floor slab 50 and the second floor slab 60. Therefore, the displacement preventing member 43 transmits a horizontal shear force between the support member 42 and the filler 30, and it becomes possible to transmit a horizontal shear force between the filler 30 and each of the first floor slab 50 and the second floor slab 60 due to the unevenness of each of the first floor slab 50 and the second floor slab 60. Therefore, the displacement of the filler 30 with respect to the support member 42 and the displacements of the first floor slab 50 and the second floor slab 60 can be more reliably suppressed.

[0050] (Third Embodiment) Subsequently, the floor slab 70 according to the third embodiment will be described with reference to FIGS. 6, 7, and 8. The floor slab 70 can be used, for example, in place of the aforementioned first floor slab 50 or second floor slab 60. Further, the floor slab 70 can also be used in place of the aforementioned first floor slab 10 or second floor slab 20. FIG. 6 is a perspective view of the end face 73 of the floor slab 70 as viewed from below. FIG. 7 is a plan view showing the end face 73 of the floor slab 70. FIG. 8 is a front view of the end face 73.

[0051] The floor slab 70 has, for example, reinforcing bars 76. However, the floor slab 70 may not have the reinforcing bars 76, for example, when the floor slab 70 is a UFC floor slab. The floor slab 70 has an upper surface 71 extending in the bridge axis direction D1 and the direction perpendicular to the bridge axis D2, a lower surface 72 extending in the bridge axis direction D1 and the direction perpendicular to the bridge axis D2 on the side opposite to the upper surface 71 of the floor slab 70, and an end face 73 extending in the direction perpendicular to the bridge axis D2 and the height direction D3.

[0052] The end face 73 is a surface facing another floor slab. A filler (for example, the filler 30) is filled between the end face 73 and the other floor slab. The end face 73 has a convex portion 74 protruding toward the other floor slab and a concave portion 75 recessed in a direction away from the other floor slab. The end face 73 has a plurality of convex portions 74 and a plurality of concave portions 75.

[0053] For example, the convex portion 74 protrudes in plan view, and the concave portion 75 is recessed in plan view. As an example, the convex portion 74 and the concave portion 75 are arranged along the direction D2 perpendicular to the bridge axis. However, in the third embodiment, the convex portion 74 and the concave portion 75 may be arranged along the bridge axis direction D1 or the height direction D3, and the direction in which the convex portion 74 and the concave portion 75 are arranged is not particularly limited.

[0054] The convex portion 74 has, for example, a top surface 77 and a plurality of inclined surfaces 78 that are inclined with respect to the bridge axis direction D1, the direction D2 perpendicular to the bridge axis, and the height direction D3. The concave portion 75 has, for example, a bottom surface 79 and a plurality of inclined surfaces 80 that are inclined with respect to the bridge axis direction D1, the direction D2 perpendicular to the bridge axis, and the height direction D3. Each inclined surface 80 is provided on the extension (on the same plane) of each inclined surface 78. The inclined surface 78 of one convex portion 74 is inclined so as to approach or separate from another convex portion 74 as it goes from one side to the other side in the height direction D3. That is, the inclined surface 78 is inclined in the direction in which the convex portion 74 expands or contracts as it goes from one side to the other side in the height direction D3.

[0055] A reinforcing bar 76 protrudes from the convex portion 74. The floor slab 70 has, for example, a plurality of reinforcing bars 76, and the plurality of reinforcing bars 76 are arranged along the height direction D3. As an example, the reinforcing bar 76 protrudes from the top surface 77 of the convex portion 74, and a pair of upper and lower reinforcing bars 76 are arranged on the top surface 77. However, the floor slab 70 may not have the reinforcing bar 76, and for example, may have the continuous fiber reinforcing material 6 described above instead of the reinforcing bar 76.

[0056] For example, the top surface 77 is a flat surface. As an example, the top surface 77 has a drum shape. In this case, the length of the top surface 77 in the horizontal direction (for example, the direction D2 perpendicular to the bridge axis) becomes longer as it goes from the center in the height direction D3 of the end surface 73 to each of both ends in the height direction D3. For example, the bottom surface 79 is a flat surface. As an example, the bottom surface 79 has a hexagonal shape. In this case, the length of the bottom surface 79 in the horizontal direction becomes shorter as it goes from the center in the height direction D3 of the end surface 73 to each of both ends in the height direction D3.

[0057] For example, the inclined surface 78 is flat. As an example, the inclined surface 78 has a rectangular shape. The plurality of inclined surfaces 78 include a first inclined surface 78b located on one side (e.g., the upper side) in the height direction D3 and a second inclined surface 78c located on the other side (e.g., the lower side) in the height direction D3. The orientation of the first inclined surface 78b is different from that of the second inclined surface 78c. The first inclined surface 78b of one convex portion 74 is inclined so as to be separated from the other convex portion 74 (in the direction in which the convex portion 74 narrows) as it extends downward from the upper end. Also, the second inclined surface 78c of one convex portion 74 is inclined so as to approach the other convex portion 74 (in the direction in which the convex portion 74 widens) as it extends downward from the upper end.

[0058] The first inclined surface 78b faces one of diagonally downward and diagonally upward, and the second inclined surface 78c faces the other of diagonally downward and diagonally upward. As a specific example, the first inclined surface 78b is directed diagonally downward, and the second inclined surface 78c is directed diagonally upward. That is, the normal line of the first inclined surface 78b extends diagonally downward from the first inclined surface 78b, and the normal line of the second inclined surface 78c extends diagonally upward from the second inclined surface 78c.

[0059] As described above, the floor slab 70 according to the third embodiment has an end face 73 facing another floor slab, and a convex portion 74 protruding toward the other floor slab is formed on the end face 73. Therefore, after the packing material is filled between the floor slab 70 and the other floor slab, the shear force acting between each floor slab and the packing material can be transmitted more effectively, so that the shear strength can be increased. Further, the convex portion 74 formed on the end face 73 facing another floor slab has an inclined surface 78 inclined with respect to the bridge axis direction D1, the direction perpendicular to the bridge axis D2, and the height direction D3. The inclined surface 78 is inclined so as to approach or separate from the other convex portion 74 as it goes from one side to the other side in the height direction D3. Therefore, the shear force can be transmitted in three directions, namely, the bridge axis direction D1, the direction perpendicular to the bridge axis D2, and the height direction D3, between the floor slab 70 and the packing material through the inclined surface 78, so that the shear force can be transmitted more effectively. Further, in the third embodiment, the packing material 30 can be filled more reliably than in the first embodiment. For example, in the case of the first embodiment, there is a concern that an air pocket may be formed under the convex portion, but in the third embodiment, the generation of such an air pocket can be more reliably suppressed.

[0060] In the floor slab 70 according to the third embodiment, the convex portion 74 has a plurality of inclined surfaces 78, and the plurality of inclined surfaces 78 include a first inclined surface 78b located on one side in the height direction D3 and a second inclined surface 78c located on the other side in the height direction D3, and the first inclined surface 78b and the second inclined surface 78c are arranged in the height direction D3. The first inclined surface 78b faces one of diagonally downward and diagonally upward (diagonally downward in the above example), and the second inclined surface 78c faces the other of diagonally downward and diagonally upward (diagonally upward in the above example). Therefore, when the floor slab 70 receives a downward shear force with respect to the packing material and when the packing material receives a downward shear force with respect to the floor slab 70, the shear force can be transmitted in three directions through either the first inclined surface 78b or the second inclined surface 78c. Therefore, the transmission of the shear force between the floor slab 70 and the packing material can be made more effective.

[0061] The floor slab 70 according to the third embodiment may include a reinforcing bar 76 protruding from the convex portion 74. Therefore, compared with a floor slab including a reinforcing bar protruding from a portion other than the convex portion 74 (for example, the concave portion 75), the formwork used in manufacturing the floor slab 70 can be easily removed. Accordingly, the manufacturing of the floor slab 70 can be easily performed.

[0062] (Fourth Embodiment) Next, the floor slab 90 according to the fourth embodiment will be described with reference to FIGS. 9 and 10. Similar to the floor slab 70, the floor slab 90 can be used in place of the aforementioned first floor slab 50 or second floor slab 60. A part of the configuration of the floor slab 90 is the same as a part of the configuration of the floor slab 70. Therefore, the description overlapping with that of the floor slab 70 will be appropriately omitted.

[0063] FIG. 9 is a perspective view of the end face 93 of the floor slab 90 as viewed from below. FIG. 10 is a plan view showing the end face 93 of the floor slab 90. As shown in FIGS. 9 and 10, it has an upper surface 91 extending in the bridge axis direction D1 and the direction perpendicular to the bridge axis D2, a lower surface 92 extending in the bridge axis direction D1 and the direction perpendicular to the bridge axis D2 on the side opposite to the upper surface 91 of the floor slab 90, and an end face 93 extending in the direction perpendicular to the bridge axis D2 and the height direction D3.

[0064] The end face 93 has a convex portion 94 protruding toward the other floor slab described above and a concave portion 95 recessed in a direction away from the other floor slab. The convex portion 94 has, for example, a top surface 97 and a plurality of inclined surfaces 98 inclined with respect to the bridge axis direction D1, the direction perpendicular to the bridge axis D2, and the height direction D3. The concave portion 95 has, for example, a bottom surface 99 and a plurality of inclined surfaces 100 inclined with respect to the bridge axis direction D1, the direction perpendicular to the bridge axis D2, and the height direction D3. The inclined surface 98 of one convex portion 94 is inclined so as to approach the other convex portion 94 (in the direction in which the convex portion 94 spreads) from the upper end toward the lower end.

[0065] For example, the top surface 97 has a trapezoidal shape. In this case, the length of the top surface 97 in the horizontal direction (for example, the direction D2 perpendicular to the bridge axis) increases from one side (for example, the upper side) to the other side (for example, the lower side) in the height direction D3 of the end face 93. For example, the bottom surface 99 has a trapezoidal shape. In this case, the length of the bottom surface 99 in the horizontal direction decreases from one side to the other side in the height direction D3 of the end face 93. For example, the inclined surface 98 has a quadrilateral shape. As an example, the inclined surface 98 has a parallelogram shape. The inclined surface 98 faces one of diagonally downward and diagonally upward, and as an example, it is directed diagonally upward. That is, the normal line of the inclined surface 98 extends obliquely upward from the inclined surface 98.

[0066] As described above, the floor slab 90 according to the fourth embodiment has an end face 93 facing another floor slab, and a convex portion 94 protruding toward the other floor slab is formed on the end face 93. And the convex portion 94 formed on the end face 93 facing another floor slab has an inclined surface 98 inclined with respect to the bridge axis direction D1, the direction D2 perpendicular to the bridge axis, and the height direction D3. Therefore, since the shear force can be transmitted in three directions of the bridge axis direction D1, the direction D2 perpendicular to the bridge axis, and the height direction D3 between the floor slab 90 and the filler via the inclined surface 98, the shear force can be transmitted more effectively. Therefore, the same effect as that of the floor slab 70 can be obtained from the floor slab 90. In the fourth embodiment, the floor slab 90 in which the convex portion 94 having the inclined surface 98 directed obliquely upward is formed has been described. However, a floor slab in which a convex portion having both an inclined surface 98 directed obliquely upward and an inclined surface directed obliquely downward is formed may be used. Thus, the type and arrangement mode of the inclined surface of the convex portion of the floor slab can be appropriately changed.

[0067] As described above, various embodiments of the floor slab and the joining structure of the floor slab according to the present disclosure have been described. However, the floor slab and the joining structure of the floor slab according to the present disclosure are not limited to the above-described embodiments, and can be appropriately changed within the scope of the gist described in the claims. That is, the shape, size, material, number, and arrangement mode of each part in the floor slab and the joining structure of the floor slab can be appropriately changed within the scope of the above gist.

[0068] For example, in the above-described first embodiment, as shown in FIG. 1, the joining structure 1 including the first floor slab 10 and the second floor slab 20 facing each other along the bridge axis direction D1 was described. However, the first floor slab 10 and the second floor slab 20 may face each other along the direction perpendicular to the bridge axis D2, and the direction in which the first floor slab and the second floor slab face each other is not particularly limited.

[0069] For example, in the above-described second embodiment, the joining structure 41 including the displacement-preventing member 43 which is a stud gable was described. However, the type of the displacement-preventing member is not limited to a stud gable. For example, the displacement-preventing member may be a perforated steel gable. That is, various displacement-preventing members can be used as long as they can be integrated with the filler between the first floor slab and the second floor slab.

[0070] For example, in the above-described third embodiment, the floor slab 70 including the convex portion 74 having a top surface 77 in a drum shape and the concave portion 75 having a bottom surface 79 in a hexagonal shape was described. However, instead of the convex portion 74 and the concave portion 75, a floor slab including a convex portion having a top surface in a hexagonal shape and a concave portion having a bottom surface in a drum shape may be used. That is, the unevenness on the floor slab 70 may be reversed. Further, the shapes of the convex portion and the concave portion of the floor slab 70 are not limited to those of the above-described embodiments and can be appropriately changed. The same applies to the floor slab 90 according to the fourth embodiment.

Explanation of Reference Numerals

[0071] 1,41…Joint structure, 6…Continuous fiber reinforcing material, 7…Element wire, 10…First floor slab, 11…Upper surface, 12…Lower surface, 13…First end face, 14…First convex part, 14b…Top surface, 14c…Inclined surface, 15…First concave part, 15b…Bottom surface, 15c…Inclined surface, 16…First continuous fiber reinforcing material, 20…Second floor slab, 21…Upper surface, 22…Lower surface, 23…Second end face, 24…Second convex part, 24b…Top surface, 24c…Inclined surface, 25…Second concave part, 25b…Bottom surface, 25c…Inclined surface, 26…Second continuous fiber reinforcing material, 30…Filling material, 42…Supporting member, 42b…Upper flange, 42c…Web, 42d…Lower flange, 43…Anti-displacement member, 43b…Fixed part, 43c…Rod-shaped part, 50…First floor slab, 51…Upper surface, 52…Lower surface, 53…First end face, 54…First convex part, 55…First concave part, 60…Second floor slab, 61…Upper surface, 62…Lower surface, 63…Second end face, 64…Second convex part, 65…Second concave part, 70…Floor slab, 71…Upper surface, 72…Lower surface, 73…End face, 74…Convex part, 75…Concave part, 76…Steel bar, 77…Top surface, 78…Inclined surface, 78b…First inclined surface, 78c…Second inclined surface, 79…Bottom surface, 80…Inclined surface, 90…Floor slab, 91…Upper surface, 92…Lower surface, 93…End face, 94…Convex part, 95…Concave part, 97…Top surface, 98…Inclined surface, 99…Bottom surface, 100…Inclined surface, A…Construction site, D1…Bridge axis direction, D2…Direction perpendicular to the bridge axis, D3…Height direction.

Claims

1. A floor slab extending in a bridge axis direction, a direction perpendicular to the bridge axis direction (right angle to the bridge axis), and a height direction perpendicular to both the bridge axis direction and the direction perpendicular to the bridge axis, having an end face facing another floor slab, wherein a plurality of convex portions protruding toward the other floor slab are arranged on the end face, at least one surface of each of the convex portions is an inclined surface inclined with respect to the bridge axis direction, the direction perpendicular to the bridge axis, and the height direction, the inclined surface of one of the convex portions is inclined so as to approach or separate from the other convex portions as it goes from one side to the other side in the height direction, the convex portion has a top surface and a plurality of inclined surfaces inclined with respect to the bridge axis direction, the direction perpendicular to the bridge axis, and the height direction, the top surface has a portion where the horizontal length of the top surface becomes longer as it goes from one side to the other side in the height direction of the end face, floor slab.

2. The convex portion has a plurality of the inclined surfaces forming the side surface of the convex portion, the plurality of the inclined surfaces include a first inclined surface located on one side in the height direction and a second inclined surface located on the other side in the height direction, the first inclined surface and the second inclined surface are arranged side by side in the height direction, the first inclined surface faces one of diagonally downward and diagonally upward, the second inclined surface faces the other of diagonally downward and diagonally upward, The floor slab according to Claim 1.

3. comprising reinforcing bars protruding from the convex portion, The floor slab according to Claim 1 or 2.

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