Composite slabs, plate members and deck plates

Abstract

To provide a composite slab and a plate member that do not increase the labor of construction and lower a story height.SOLUTION: A composite slab 20 comprises a deck plate 21 and concrete 26 formed on the deck plate 21. The deck plate 21 has upper flanges 32 and lower flanges 31 so that a longitudinal section in a X direction has uneven shape. The deck plate 21 is placed to be the height abutting an under surface of the upper flange 32 to an upper surface of a girder 11 extending in a Y direction orthogonal to the X direction and supporting the deck plate 21. An upper surface edge part with a same height as the upper flange 32 continuing the lower flange 31 is provided at an end part of the deck plate 21 in the Y direction. The upper surface edge part is mounted on a girder 12 so that the girder 12 extending in a direction different from the girder 11 and the girder 11 have a same height.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention is a composite slab constructed by bridging beams. 、 Plate material and deck plate Regarding. [Background technology]

[0002] Conventionally, composite slabs, in which concrete is poured onto deck plates spanning girders, have been used as floor slabs in buildings. These deck plates use plate members with upper and lower flanges to create an uneven shape (see, for example, Patent Document 1). In this document, when an end-blocking deck plate is laid across the beams, end width adjustment plates are placed in the gap between the deck plate and the beams in the width direction of the deck plate along with intermediate width adjustment plates.

[0003] Conventionally, as shown in FIG. 14, a composite slab 92 constituting a floor slab 90 is constructed by pouring concrete 96 on a deck plate 95. Here, the deck plate 95 is spanned between girders 91 by placing its ends on the girders. For this reason, the girders 91 typically support the composite slab 92 at a position that protrudes downward in the uneven cross section of the composite slab 92 (the lower surface of the lower flange of the deck plate 95). Lowering the floor height of buildings using such composite slabs has been studied (see, for example, Patent Document 2). In the composite slab construction method described in Patent Document 2, concrete is poured in a manner that encases the upper portions of the girders. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-177512 [Patent Document 2] Japanese Patent Publication No. 55-114742 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the composite slab construction method described in Patent Document 2, the top of the beams is buried in concrete, so construction work is required to prevent concrete leakage from the parts where the beams are inserted, which is time-consuming. [Means for solving the problem]

[0006] A composite slab that solves the above problem is a composite slab comprising a deck plate having a longitudinal cross section with an uneven shape in a first direction due to an upper flange, a lower flange, and a connecting portion connecting them, and concrete formed integrally with the deck plate, wherein the deck plate has an upwardly protruding key groove formed on the upper surface of the lower flange, and an upper edge portion connected to the lower flange via an inclined portion at the end in a second direction perpendicular to the first direction, the upper edge portion being at the same height as the upper flange, and the deck plate is spanned across the first beam and the second beam by placing the upper flange on a first beam and placing the upper edge portion on a second beam that extends in a different direction from the first beam.

[0007] Furthermore, a composite slab that solves the above problem is a composite slab comprising a deck plate having an uneven cross section in a first direction due to an upper flange, a lower flange, and a connection portion connecting them, and concrete formed integrally with the deck plate, wherein the deck plate has an upwardly protruding key groove formed on the upper surface of the lower flange, and the deck plate is spanned across the first beam and the second beam by placing the upper flange on a first beam and the lower flange on a deck support material fixed to a second beam extending in a different direction from the first beam, and the deck support material is fixed to the second beam at a position lower than the upper flange of the second beam by the height of the upper and lower flanges of the deck plate.

[0008] Furthermore, the plate member that solves the above problem is a plate member that constitutes the deck plate of a composite slab, and has a longitudinal cross section with an uneven shape in a first direction due to an upper flange, a lower flange, and a connecting portion connecting them, and at the end in a second direction perpendicular to the first direction, has an upper surface edge portion connected to the lower flange via an inclined portion, the upper surface edge portion being at the same height as the upper flange, and a key groove that protrudes upward is formed on the upper surface of the lower flange. [Effects of the Invention]

[0009] According to the present invention, the floor height can be lowered or the ceiling height can be increased without increasing the amount of work required for construction. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a front cross-sectional view of the floor structure of a building according to the embodiment. [Figure 2] FIG. 2 is an enlarged front cross-sectional view illustrating a main part of a composite slab in an embodiment. [Figure 3] FIG. 2 is an enlarged cross-sectional side view illustrating a main portion of a composite slab according to an embodiment. [Figure 4] FIG. 2 is a perspective view showing the relationship between the deck plate and the girder that constitute the composite slab in the embodiment. [Figure 5] FIG. 2 is a cross-sectional view illustrating a plate member used in the deck plate according to the embodiment. [Figure 6] FIG. 2 is a perspective view illustrating a plate member in the embodiment. [Figure 7] FIG. 4 is an enlarged top view illustrating an end portion of a plate member in the embodiment. [Figure 8] FIG. 2 is a cross-sectional view illustrating an adjustment plate used in the deck plate in the embodiment. [Figure 9] FIG. 10 is a perspective view illustrating accessories used in a composite slab in an embodiment. [Figure 10] FIG. 10 is an explanatory diagram illustrating the relationship between the accessory and the beam in the embodiment. [Figure 11]FIG. 10 is an explanatory diagram illustrating the configuration of a composite slab in a first modified example. [Figure 12] FIG. 10 is an explanatory diagram illustrating the configuration of a composite slab in a second modified example. [Figure 13] FIG. 10 is an explanatory diagram illustrating the configuration of a composite slab in a third modified example. [Figure 14] FIG. 1 is a front cross-sectional view of a floor structure using a composite slab according to the prior art. DETAILED DESCRIPTION OF THE INVENTION

[0011] Below, using Figures 1 to 10, we will explain the composite slab that is constructed by bridging over the girders. 、 Plate material and deck plate An embodiment that embodies the above will be described. As shown in FIG. 1, the floor slab 10 of this embodiment is arranged with a composite slab 20 abutting against the upper flanges 11f of multiple girders 11. The girder 11, which serves as a first beam, is made of H-shaped steel. The girder 11 is covered with a fire-resistant covering material 16. In this embodiment, the floor slab 10 is also placed on a secondary beam 17 connected to the girders 11 and 12. A floor finishing material 18 is laid on the composite slab 20, and a ceiling material 19 for the lower floor is placed below the girders 11.

[0012] (Composition of composite slab 20) 2 and 3 are a front cross-sectional view and a side cross-sectional view showing the main parts of the girder 11 and the composite slab 20. Fig. 2 is a cross-sectional front view taken along the X direction, which is the first direction, and Fig. 3 is a longitudinal cross-sectional view taken along the Y direction, which is the second direction perpendicular to the X direction. Here, the underside of the composite slab 20 has an uneven shape (wave shape) in the X direction, which is the width direction of the girder 11.

[0013] Fig. 4 is a perspective view showing the state in which plate member 30, adjustment plate 40, and accessory 50 are placed across orthogonal girders 11 and 12 before concrete 26 is poured. Here, girder 12, which serves as a second beam, is also made of H-shaped steel, just like girder 11. Note that fire-resistant covering material 16, sub-girders 17, floor finishing material 18, and ceiling material 19 are not shown in Figs. 2 to 4.

[0014] As shown in Figures 2 and 3, the composite slab 20 comprises an uneven deck plate 21 and concrete 26. The concrete 26 is formed integrally with the deck plate 21 above the deck plate 21. The underside of the concrete 26 has an uneven cross section that follows the shape of the deck plate 21. The concrete 26 is formed to the same thickness as conventional concrete.

[0015] As shown in Fig. 4, the deck plate 21 includes a plurality of plate members 30, an adjustment plate 40, and accessories 50. The adjustment plate 40 is a member for adjusting the width of the deck plate 21, and is disposed between the plate member 30 and the girder 11 in the width direction, and is integrated with the plate member 30. The accessories 50 are disposed at the corners of the deck plate 21 near the pillars (not shown). The accessories 50 engage with the plate members 30 and the adjustment plate 40. Details of the plate members 30, the adjustment plate 40, and the accessories 50 will be described later.

[0016] 2 and 3, a plurality of stud bolts 15 are provided on the upper surfaces of the upper flanges 11f, 12f of the girders 11, 12. These stud bolts 15 are embedded in concrete 26. In this embodiment, three stud bolts 15 are used side by side, each of which has a size that ensures a predetermined cover thickness (for example, 30 mm) depending on the thickness of the concrete 26. Furthermore, crack prevention bars 25 are buried in the concrete 26. The crack prevention bars 25 are made of lattice-shaped reinforcing bars.

[0017] (Configuration of plate member 30) Fig. 5 is a cross-sectional view taken along the width direction (X direction) of the plate member 30. Fig. 6 is a perspective view of the plate member 30, and Fig. 7 is an enlarged plan view of the end portion of the plate member 30 in the extension direction.

[0018] As shown in FIGS. 5 and 6 , the plate member 30 of this embodiment has an uneven shape and includes a lower flange (valley portion) 31, two upper flanges (peak portions) 32, and a connecting portion 33 that connects the ends of these flanges at an angle. In the plate member 30, the height from the lower flange 31 to the upper flange 32 is, for example, 75 mm. The lower flange 31 is provided with an upwardly protruding key groove 31a. This key groove 31a has a shape in which the joint portion is narrower than the upper portion and bulges upward, and is provided to integrate the concrete 26 with the deck plate 21. In addition, the upper flange 32 is provided with a downwardly protruding rib 32r with a V-shaped cross section. The key groove 31a and the rib 32r are provided to extend in the extension direction (Y direction) of the plate member 30.

[0019] At both widthwise ends of the plate member 30, an inner engaging end 34a and an outer engaging end 34b are provided on the lower flange 31. By hooking and engaging the inner engaging end 34a of one plate member 30 with the outer engaging end 34b of another plate member 30 so as to cover it, multiple plate members 30 can be integrated and aligned in the X direction.

[0020] 4 and 6, the longitudinal (Y-direction) ends of the plate member 30 have the same configuration. The Y-direction end of the lower flange 31 is provided with an upper surface edge portion 31b that is flush with the height of the upper flange 32, and an inclined surface portion 31s that inclines to connect this upper surface edge portion 31b to the lower flange 31. Note that, like the lower flange 31, the Y-direction ends of the inner engaging end portion 34a and the outer engaging end portion 34b are provided with upper surface edges and inclined surface portions 34as, 34bs.

[0021] 6 and 7, a plurality of protrusions 31e are provided on the upper surface edge 31b located at the end of the lower flange 31. The protrusions 31e extend in the longitudinal direction of the plate member 30 at the upper surface edge 31b and protrude downward. In addition, a plurality of ribs 32e protruding upward are provided at the end of the upper flange 32. The ribs 32e are provided at positions corresponding to the inclined surface portion 31s from the upper surface edge 31b. If a conventional end-closed plate member is turned upside down, the key groove located on the lower flange protrudes toward the opposite side (downward) of the concrete side. A conventional end-closed plate member is a plate member in which the end of the upper flange is inclined and has a flat portion at the same height as the lower flange. In the plate member 30 of this embodiment, the key groove 31a is formed in the opposite direction to the key groove of a conventional end-closed plate member. Therefore, the plate member 30 is not simply a conventional end-closed plate member turned upside down.

[0022] (Configuration of adjustment plate 40) FIG. 8 shows a cross-sectional view of the adjusting plate 40 provided between the plate member 30 and the girder 11. The adjusting plate 40 is a long object whose cross-sectional shape continues to the end, and comprises a lower surface portion 41, an inclined portion 42, and an upper surface portion 43. The lower surface portion 41 and the upper surface portion 43 are configured at heights flush with the lower flange 31 and the upper flange 32 of the plate member 30, respectively. The inclined portion 42 is Short side direction One end of the upper surface 43 Short side direction An inclined surface connects the lower surface portion 41 to one end of the plate member 30. An engaging end portion 41a having a shape similar to the inner engaging end portion 34a of the plate member 30 is provided at the end of the lower surface portion 41. This engaging end portion 41a is configured to be able to engage with the outer engaging end portion 34b of the plate member 30. 2, in this embodiment, the upper surface 43 of the adjusting plate 40 is placed on the girder 11. Furthermore, the engaging end 41a of the adjusting plate 40 is fitted into the outer engaging end 34b of the plate member 30, and the adjusting plate 40 and the plate member 30 are integrated together.

[0023] (50 pieces of equipment) Fig. 9 shows a perspective view of accessory 50 provided at the end of girder 11 and the end of girder 12. This accessory 50 has a substantially rectangular top surface 51 and a side edge 53. Side edge 53 is provided at one longitudinal end of top surface 51. Note that the positions of side edge 53 and notch 52, which will be described later, of accessory 50 vary depending on the placement position (the relative positions of girders 11, 12).

[0024] 10 is an explanatory diagram illustrating the positional relationship between the accessory 50 and the girders 11, 12. The lower surface of the upper surface portion 51 of the accessory 50 abuts against the upper surfaces of the upper flanges 11f, 12f of the girders 11, 12. In addition, the upper surface portion 51 of the accessory 50 has a notch 52 formed in a portion corresponding to a pillar (not shown).

[0025] 9, the side edge 53 of the accessory 50 includes an upper surface edge 53a, a lower surface edge 53b, and an inclined side edge 53s. The upper surface edge 53a is at the same height as the upper surface 51 and is continuous with the upper surface 51. The inclined side edge 53s connects the upper surface edge 53a and the lower surface edge 53b with an inclined surface. The accessory 50 also has a connecting surface 54. The connecting surface 54 connects the end of the lower surface side edge 53b and the end of the upper surface 51 in a substantially vertical plane.

[0026] Furthermore, a hill-shaped protrusion 55 that protrudes upward is provided on the end of the top surface edge 53a side of the top surface 51 of the accessory 50. This protrusion 55 has a rectangular parallelepiped shape with an open bottom and sloping short sides, and is formed integrally with the top surface 51. This protrusion 55 is provided to be integrated with the concrete 26 formed above.

[0027] (Construction method for floor slab 10) Next, a method for constructing the composite slab 20 will be described. As shown in Fig. 4, girders 11 and 12 are fixed to pillars (not shown) of a building. Then, a deck plate 21 is assembled and placed between the girders 11 and 12. Before placing the deck plate 21, a sub-girder 17 may be installed below the deck plate.

[0028] When assembling the deck plate 21, the plate members 30 are aligned in the width direction. In this case, the inner engaging end 34a of one plate member 30 is hooked over the outer engaging end 34b of an adjacent plate member 30 so as to cover the inner engaging end 34b, thereby aligning the multiple plate members 30 in an integrated state in the X direction.

[0029] Furthermore, an adjustment plate 40 is placed between the plate member 30 and the girder 11. In this case, the engagement end 41a of the lower surface portion 41 of the adjustment plate 40 is engaged with the outer engagement end portion 34b of the plate member 30, and the upper surface portion 43 of the adjustment plate 40 is placed on the upper flange 11f of the girder 11.

[0030] Then, the accessory 50 is placed at the corner where the end of the main beam 11 and the end of the main beam 12 meet. In this case, the notch 52 is aligned with the position of the pillar. The accessory 50 is also engaged with the adjustment plate 40 and the plate member 30. Next, crack prevention reinforcement 25 is placed above the deck plate 21, which has been assembled as described above. Furthermore, stud bolts 15 are placed on the girders 11, 12. After placing concrete retainers on the girders 11, 12, concrete 26 is poured. After that, fire-resistant covering material 16 is applied to the girders 11, 12, and floor finishing material 18 and ceiling material 19 are placed. With the above steps, the floor slab 10 shown in Figure 1 is completed.

[0031] (action) In this embodiment, the ends of the deck plate 21 are placed on the girders 11, 12 so that the girders 11, 12 support the composite slab 20 at the height of the upper flange 32 of the deck plate 21. This allows the girders 11, 12 to support the composite slab 20 at the position (height) of the upper flange 32 of the deck plate 21.

[0032] According to this embodiment, the following effects can be obtained. (1) In this embodiment, the deck plate 21 is spanned between the girders 11, 12 so that the girders 11, 12 are supported by the upper flange 32 of the deck plate 21 of the composite slab 20. This allows the girders 11, 12 to support the deck plate 21 at a position higher than the lower flange 31 of the deck plate 21, thereby lowering the height of the upper surface of the composite slab 20 relative to the girders 11, 12. This shortens the distance from the ceiling to the floor, allowing for lower floor heights or higher ceiling heights. Furthermore, construction can be carried out with the same effort as for a composite slab using a conventional deck plate.

[0033] (2) In this embodiment, the plate member 30 constituting the deck plate 21 has an upper surface edge portion 31b at the end of the lower flange 31 that is at the same height as the upper flange 32. Therefore, by placing this upper surface edge portion 31b on the girder 12, the girder 12 can support the deck plate 21 at the height of the upper flange 32 of the deck plate 21. In addition, the plate member 30 is provided with a key groove 31a that protrudes upward, which allows the plate member 30 and the concrete 26 to be integrated together, ensuring the rigidity of the composite slab 20.

[0034] (3) In this embodiment, the end of the plate member 30 has a downwardly protruding protrusion 31e and an upwardly protruding rib 32e. Without these protrusions 31e and ribs 32e, waves would form in the concrete in this area, resulting in poor adhesion to the concrete 26. Therefore, by providing the protrusions 31e and ribs 32e, it is possible to prevent the concrete 26 from collapsing when poured and to prevent the concrete 26 from leaking. As a result, it is possible to increase the strength of the composite slab 20 and smooth the surface of the composite slab 20.

[0035] (4) In this embodiment, an adjustment plate 40 is provided between the girder 11 and the plate member 30 in the width direction of the plate member 30. This adjustment plate 40 includes a lower surface portion 41 having an engagement end portion 41a that engages with the outer engagement end portion 34b of the lower flange 31 of the plate member 30, and an upper surface portion 43 that is the same height as the upper flange 32 of the plate member 30. This makes it possible to use the adjustment plate 40 to adjust the distance between the girder 11 and the integrated multiple plate members 30.

[0036] (5) In this embodiment, the accessory 50 is placed at the position where the ends of the girders 11, 12 butt against each other. This allows pouring of concrete 26 while suppressing slag leakage at the corners of the girders 11, 12, even when using an adjustment plate 40 having an end with the same cross-sectional shape.

[0037] (6) In this embodiment, the thickness of the concrete 26 on the deck plate 21 is the same as in the conventional case. The girders 11, 12 support the deck plate 21 at the height of the upper flange 32. For this reason, small stud bolts 15 that can ensure sufficient cover thickness are placed on the girders 11, 12. This allows the concrete 26 and the girders 11, 12 to be integrated even if the stud bolts 15 are made smaller.

[0038] This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility. In the above embodiment, a plate member 30 is used for the deck plate 21 of the composite slab 20. This plate member 30 has an upper surface edge portion 31b at the end of the lower flange 31 in the extension direction (Y direction) that is the same height as the upper flange 32. Instead of this plate member 30, a plate member whose uneven cross section continues to both ends (not end-closed type) may be used.

[0039] As shown in FIG. 11, a composite slab 60 may be constructed using a deck plate using plate members 65. The plate members 65 are elongated members having an uneven cross section extending to both ends, as shown in FIG. 5, and have upper and lower flanges 65a and 65b. A deck support member 62 is welded to the side of the upper flange 12f of the girder 12 that supports the composite slab 60. The deck support member 62 is, for example, an L-shaped angle (angle iron) in cross section. In this case, the deck support member 62 is fixed to the girder 12 so that the horizontal surface of the deck support member 62 is lower than the upper flange 12f of the girder 12 by the height of the upper flange 65a and the lower flange 65b of the plate member 65. As a result, when the plate member 65 is placed on the deck support member 62, the upper surface of the upper flange 12f of the girder 12 abuts against the lower surface of the upper flange 65a of the plate member 65. Furthermore, the end of the plate member 65 is tightly attached to the vertical surface of the deck support member 62. If there are gaps, concrete stops are installed. Then, crack prevention bars 25 are placed, and concrete 66 is poured. The composite slab 60 configured in this way can be supported by the girders 12 at the height of the upper flange 65a of the deck plate.

[0040] Alternatively, the deck plate may be constructed using a conventional end-closed plate member, in which the Y-direction end of the upper flange of the end-closed plate member is at the same height as the lower flange.

[0041] For example, as shown in FIG. 12, a composite slab 67 may be formed using a plate member 68 instead of the plate member 65 shown in FIG. 11. In this composite slab 67, the plate member 68 is placed on a deck support member 62 attached to the girder 12. The Y-direction end of the upper flange 68a of this plate member 68 forms a lower end 68ab that is flush with the lower flange 68b. This lower end 68ab is connected to the upper flange 68a via an inclined surface 68s. When the end of the lower flange 68b of the plate member 68 is placed on the end of the horizontal portion, the deck support member 62 is fixed to the girder 12 so that the upper surface of the upper flange 12f of the girder 12 is flush with the lower surface of the upper flange 68a of the plate member 68. Additionally, stud bolts may be installed upright on the upper surface of the deck support member 62 within the concrete 66.

[0042] 13, a composite slab 70 may be constructed using a deck plate using plate members 71. This plate member 71 has a lower surface portion 71ab and an inclined surface portion 71s at the end in the extension direction of the upper flange 71a. The lower surface portion 71ab forms the water surface at the same height as the lower flange 71b. The inclined surface portion 71s connects the lower surface portion 71ab and the upper flange 71a at an incline.

[0043] Additionally, a deck support material 75 and stiffeners 76 are welded to the webs 12w of the girders 12 that support the composite slab 70. The deck support material 75 is a plate member that extends in the extension direction of the girders 12 and protrudes horizontally from the webs 12w. The deck support material 75 is provided in a position where, when the plate member 71 is supported on its upper surface, the lower surface of the upper flange 71a of the plate member 71 is at the same height as the upper surface of the girder 12. The stiffeners 76 are provided in contact with the lower surface of the deck support material 75 and reinforce the deck support material 75.

[0044] The end of the plate member 71 is then supported by the deck support material 75. Furthermore, stud bolts 77 are placed at the outer end of the deck support material 75 (the opposite side from the web 12w). Furthermore, after placing crack prevention reinforcement 25 and concrete stoppers, concrete is poured above the plate member 71 and deck support material 75 to form concrete 78. This completes the composite slab 70 made up of the deck plate using the plate member 71 and the concrete 78. Therefore, the girder 12 can support this composite slab 70 at the height of the upper flange 71a of the deck plate.

[0045] In the above embodiment, the protrusions 31e and ribs 32e formed on the upper surface of the plate member 30 constituting the deck plate 21 have a shape that extends in the extension direction of the plate member 30. The protrusions 31e and ribs 32e formed on the Y-direction end of the plate member 30 are not limited to these shapes. They may have any shape that prevents waves from forming in the concrete and prevents bending of the concrete 26 when poured and prevents slag leakage of the concrete 26. For example, the protrusions and ribs may be divided into multiple parts that extend in the extension direction of the plate member 30.

[0046] In the above embodiment, the plate member 30 has two upper flanges 32 on either side of the lower flange 31. The plate member 30 constituting the deck plate 21 is not limited to this shape. For example, a plate member having one upper flange 32 and one lower flange 31 on each side may be used.

[0047] In the above embodiment, the adjustment plate 40 and accessory 50 are arranged between the plate member 30 and the girder 12. Depending on the size of the deck plate 21 and the girders 11, 12, the adjustment plate 40 may be omitted by providing the shape of the adjustment plate 40 at the end of the plate member 30 in the X direction, or an adjustment plate having the shape of the accessory 50 at the end may be used, or the dimensions of these may be changed as appropriate. Furthermore, the shape of the accessory 50 is not limited to the above-mentioned shape, and the upward protruding portion 55 may be omitted, or multiple protruding portions may be provided.

[0048] In the above embodiment, the girders 11, 12 supporting the composite slab 20 are arranged in perpendicular directions. However, the girders 11, 12 supporting the composite slab 20 are not limited to being perpendicular, and may be applied to a structure in which, for example, one beam is arranged in a different direction (e.g., diagonally) relative to the other beam.

[0049] Next, the technical ideas that can be understood from the above-described embodiment and other examples will be described below. (a) The composite slab described in claim 2, characterized in that the deck plate has a lower edge portion connected to the upper flange via an inclined portion at the end in a second direction perpendicular to the first direction. (b) the deck plate includes a plurality of plate members and an adjustment plate disposed between the plate members and a first beam; A composite slab as described in claim 1, 2 or (a), characterized in that the adjustment plate has an upper surface portion that is placed on the upper surface of the first beam, a lower surface end portion that engages with the lower flange, and a connecting portion that connects the upper surface portion and the lower surface end portion. (c) A composite slab comprising a deck plate having a longitudinal cross section with an uneven shape in the first direction due to the upper flange, the lower flange, and the connecting portion connecting them, and concrete formed integrally with the deck plate, and a fitting provided at the end of the first beam and the end of the second beam that spans the deck plate, an upper surface portion that abuts on an upper surface of the upper flange of the first beam and an upper surface of the upper flange of the second beam; a side edge portion provided at one end in the longitudinal direction of the upper surface portion, the side edge portion includes an upper surface side edge portion having the same height as the upper surface portion, a lower surface side edge portion corresponding to the height of the lower flange, and an inclined side edge portion connecting the upper surface side edge portion and the lower surface side edge portion, A accessory characterized in that it further has a connecting surface portion that connects the end of the upper surface portion to the end of the lower surface side edge portion and the end of the inclined side edge portion. [Explanation of symbols]

[0050] 10...Floor slab, 11,12...Beam, 11f,12f...Upper flange of beam, 12w...Web of beam, 15,77...Stud bolt, 16...Fireproof covering material, 17...Sub-beam, 18...Floor finishing material, 19...Ceiling material, 20,60,67,70...Composite slab, 21...Deck plate, 25...Crack prevention bar, 26,66,78...Concrete, 30,65,68,71...Plate member, 31,65b,68b,71b...Bottom flange, 31a...Key groove, 31b...Upper edge, 31e...Protrusion, 31s,34as,34bs ,68s,71s...inclined surface portion, 32,65a,68a,71a...upper flange of plate member, 32e,32r...rib, 33...connection portion, 34a...inner engagement end, 34b...outer engagement end, 40...adjusting plate, 41,71ab...lower surface portion, 41a...engagement end, 42...inclined portion, 43,51...upper surface portion, 50...component, 52...notch, 53...side edge portion, 53a...upper surface side edge portion, 53b...lower surface side edge portion, 53s...inclined side edge portion, 54...connection surface portion, 55...protrusion portion, 62,75...deck support material, 68ab...lower surface end portion, 76...stiffener.

Claims

1. A composite slab comprising a deck plate having an uneven longitudinal cross section in a first direction due to an upper flange, a lower flange, and a connection portion connecting these, and concrete formed integrally with the deck plate, the deck plate includes a plurality of continuous plate members and adjustment plates disposed at both ends of the plurality of plate members in the first direction, The plate member is An upwardly protruding key groove is formed on the upper surface of the lower flange, an upper surface edge portion connected to the lower flange via an inclined portion at an end portion in a second direction perpendicular to the first direction; The adjustment plate is a lower surface portion and an upper surface portion that are flush with the lower flange and the upper flange, respectively; an inclined portion connecting one end of the lower surface portion in the first direction and one end of the upper surface portion in the first direction, the lower flange of the plate member is engaged with the lower surface portion of the adjustment plate; the upper surface edge is flush with the upper flange; A composite slab characterized in that the deck plate is spanned across the first beam and the second beam by placing the upper surface portion of the adjusting plate on the first beam and the upper edge portion on a second beam extending in a different direction from the first beam.

2. A composite slab comprising a deck plate having an uneven longitudinal cross section in a first direction due to an upper flange, a lower flange, and a connection portion connecting these, and concrete formed integrally with the deck plate, The deck plate has an upper surface of the lower flange on which a key groove protruding upward is formed, The deck plate is bridged across the first beam and the second beam by placing the upper flange on a first beam and the lower flange on a deck support material fixed to a second beam extending in a direction different from that of the first beam, A composite slab characterized in that the deck support material is fixed to the second beam at a position lower than the upper flange of the second beam by the height of the upper flange and the lower flange of the deck plate.

3. A plate member constituting a deck plate of a composite slab, The upper flange, the lower flange, and the connecting portion connecting them have a longitudinal cross section with a concave and convex shape in a first direction, an upper surface edge portion connected to the lower flange via an inclined portion at an end portion in a second direction perpendicular to the first direction; the upper surface edge is flush with the upper flange; An upper surface of the lower flange is formed with an upwardly protruding key groove, A plate member characterized in that the end portion in the first direction is configured in a shape having a lower surface portion and an upper surface portion that are flush with the lower flange and the upper flange, respectively, and an inclined portion that connects one end portion in the first direction of the lower surface portion and one end portion in the first direction of the upper surface portion.

4. A deck plate used in a composite slab, a plurality of continuous plate members; and adjustment plates disposed at both ends of the plurality of plate members in a first direction; The plate member is The upper flange, the lower flange, and the connecting portion connecting them have a longitudinal cross section that is uneven in the first direction, an upper surface edge portion connected to the lower flange via an inclined portion at an end portion in a second direction perpendicular to the first direction; the upper surface edge is flush with the upper flange; An upper surface of the lower flange is formed with an upwardly protruding key groove, The adjustment plate is a lower surface portion and an upper surface portion that are flush with the lower flange and the upper flange, respectively; an inclined portion connecting one end of the lower surface portion in the first direction and one end of the upper surface portion in the first direction, A deck plate characterized in that the lower flange of the plate member and the lower surface portion of the adjustment plate are engaged with each other.

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