JP2023040746A - Composite slab and plate member - Google Patents

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

The present invention relates to composite slab and plate members constructed over beams.

Conventionally, composite slabs are used as floor slabs of buildings, in which concrete is placed on deck plates that span over beams. A plate member having an upper flange and a lower flange is used for this deck plate so as to have an uneven shape (see, for example, Patent Document 1). In this document, when the end closed deck plate is laid across the beams, the width adjusting plate for the end portion together with the width adjusting plate for the intermediate portion is inserted in the gap between the deck plate and the beam in the width direction of the deck plate. to place.

Conventionally, as shown in FIG. 14, concrete 96 is placed on a deck plate 95 of a composite slab 92 that constitutes a floor slab 90 . Here, the deck plate 95 is bridged between the girders 91 by placing the ends thereof on the girders 91 . For this reason, the girders 91 normally support the composite slab 92 at positions that protrude downward in the uneven cross section of the composite slab 92 (the lower surface of the lower flange of the deck plate 95). In addition, attempts have been made to reduce the floor height of buildings using such synthetic slabs (see Patent Document 2, for example). In the synthetic slab construction method described in Patent Document 2, concrete is placed in a state of enveloping the upper part of the beam.

JP 2007-177512 A JP-A-55-114742

However, in the composite slab construction method described in Patent Document 2, since the top of the beam is buried in concrete, it is necessary to carry out construction work to suppress leakage of concrete from the part where the beam is inserted, etc. was hanging.

A composite slab for solving the above problems is a composite comprising a deck plate having an uneven vertical cross section in a first direction due to an upper flange, a lower flange, and a connecting portion connecting them, and concrete integrally formed with the deck plate. In the slab, the deck plate has a key groove protruding upward on the upper surface of the lower flange, and an end portion in a second direction perpendicular to the first direction extends from the lower flange through an inclined portion. a top edge connected to the first beam, said top edge being at the same height as said top flange, resting said top flange on a first beam, and extending in a different direction than said first beam; The deck plate is bridged over the first beam and the second beam by placing the upper surface edge on the second beam.

In addition, the synthetic slab for solving the above problems comprises a deck plate having an uneven vertical cross section in the first direction by means of an upper flange, a lower flange, and a connecting portion connecting them, and concrete formed integrally with the deck plate. wherein the deck plate is formed with an upwardly protruding key groove on the upper surface of the lower flange, allowing the upper flange to rest on the first beam and in a direction different from the first beam By placing the lower flange on a deck support member fixed to the extending second beam, the deck plate spans the first beam and the second beam, and the deck support member is mounted on the second beam. It is fixed to the second beam at a position lower than the upper flanges of the two beams by the height of the upper flange and the lower flange of the deck plate.

Further, a plate member for solving the above problems is a plate member that constitutes a deck plate of a synthetic slab, and has an uneven vertical cross section in a first direction by an upper flange, a lower flange, and a connection portion that connects them, At an end in a second direction orthogonal to the first direction, a top edge connected from the bottom flange via an inclined portion, the top edge having the same height as the top flange, A key groove protruding upward is formed on the upper surface of the lower flange.

According to the present invention, the floor height can be lowered or the ceiling height can be increased without increasing the work of construction.

It is a front sectional view of the floor structure of the building in the embodiment. It is an enlarged front cross-sectional view explaining the main part of the synthetic slab in the embodiment. FIG. 4 is an enlarged side cross-sectional view for explaining the essential parts of the synthetic slab in the embodiment; FIG. 4 is a perspective view showing the relationship between the deck plate and the girders that constitute the composite slab in the embodiment. It is a sectional view explaining a plate member used for a deck plate in an embodiment. It is a perspective view explaining a plate member in an embodiment. It is an enlarged top view explaining the edge part of the plate member in embodiment. It is a sectional view explaining an adjustment plate used for a deck plate in an embodiment. FIG. 10 is a perspective view illustrating accessories used for the synthetic slab in the embodiment; It is an explanatory view explaining the relationship between the accessory and the beam in the embodiment. FIG. 11 is an explanatory diagram for explaining the configuration of a synthetic slab in the first modified example; FIG. 11 is an explanatory diagram for explaining the configuration of a synthetic slab in a second modified example; FIG. 11 is an explanatory diagram for explaining the configuration of a combined slab in a third modified example; 1 is a cross-sectional front view of a floor structure using prior art composite slabs; FIG.

1 to 10, an embodiment of a composite slab and plate member constructed over a girder will be described below.
As shown in FIG. 1, the floor slab 10 of this embodiment is arranged such that the composite slab 20 is in contact with the upper flanges 11f of the plurality of girders 11 . The large beam 11 as the first beam is made of H-shaped steel. The girder 11 is covered with a refractory coating 16. - 特許庁In this embodiment, the floor slab 10 also rests on a small beam 17 connected to the large beams 11,12. A floor finishing material 18 is laid on the synthetic slab 20 , and a ceiling material 19 for the lower floor is placed under the girders 11 .

(Configuration of synthetic slab 20)
2 and 3 are a front cross-sectional view and a side cross-sectional view showing main parts of the girders 11 and the composite slab 20. FIG. 2 is a cross-sectional front view along the X direction, which is the first direction, and FIG. 3 is a vertical cross-sectional view along the Y direction, which is the second direction orthogonal to the X direction. Here, the lower surface of the composite slab 20 has an uneven shape (wavy shape) in the X direction of the width direction of the girders 11 .

FIG. 4 is a perspective view of a state in which the plate member 30, the adjustment plate 40 and the accessory 50 are laid across the crossing girders 11 and 12 before the concrete 26 is placed. Here, the girders 12 as the second girders, like the girders 11, are made of H-shaped steel. 2 to 4, the illustration of the fireproof covering material 16, the beams 17, the floor finishing material 18 and the ceiling material 19 is omitted.

As shown in FIGS. 2 and 3 , the synthetic slab 20 includes a deck plate 21 having an uneven shape and concrete 26 . Concrete 26 is formed integrally with deck plate 21 above deck plate 21 . The lower surface of the concrete 26 is formed with an uneven cross section along the shape of the deck plate 21 . The concrete 26 is formed with the same thickness as before.

As shown in FIG. 4, the deck plate 21 includes a plurality of plate members 30, adjustment plates 40 and accessories 50. As shown in FIG. The adjustment plate 40 is a member for adjusting the length of the deck plate 21 in the width direction, and is arranged between the girders 11 in the width direction of the plate member 30 and integrated with the plate member 30 . The accessory 50 is arranged at the corner of the deck plate 21 near the pillar (not shown). The accessory 50 is then engaged with the plate member 30 and the adjustment plate 40 . Details of the plate member 30, the adjustment plate 40, and the accessories 50 will be described later.

As shown in FIGS. 2 and 3, a plurality of stud bolts 15 are provided on the upper surfaces of the upper flanges 11f and 12f of the girders 11 and 12. As shown in FIGS. The plurality of stud bolts 15 are embedded in concrete 26 . In this embodiment, three stud bolts 15 having a size that can ensure a predetermined cover thickness (for example, 30 mm) from the stud bolts 15 are used side by side according to the thickness of the concrete 26 .
Also, crack prevention bars 25 are embedded in the concrete 26 . The crack prevention bars 25 are made of grid-like reinforcing bars.

(Structure of plate member 30)
FIG. 5 is a cross-sectional view taken along the width direction (X direction) of the plate member 30. As shown in FIG. 6 is a perspective view of the plate member 30, and FIG. 7 is an enlarged plan view of an end portion of the plate member 30 in the extending direction.

As shown in FIGS. 5 and 6, the plate member 30 of this embodiment has an uneven shape, and includes a lower flange (valley) 31, two upper flanges (peaks) 32, and their ends. and a connecting portion 33 connected by an inclination. In the plate member 30, the height from the lower flange 31 to the upper flange 32 is 75 mm, for example. The lower flange 31 is provided with a key groove 31a protruding upward. This key groove 31 a has a shape in which the joint portion is narrower than the upper portion and the upper portion is swollen, and is provided so that the concrete 26 is integrated with the deck plate 21 . Further, the upper flange 32 is provided with a rib 32r having a V-shaped cross section and protruding downward. The key grooves 31a and the ribs 32r are provided extending in the extending direction of the plate member 30 (Y direction).

An inner engaging end portion 34a and an outer engaging end portion 34b are provided on the lower flange 31 at both ends of the plate member 30 in the width direction. A plurality of plate members 30 are integrated and arranged in the X direction by hooking and engaging the inner engaging end portion 34a of the plate member 30 so as to cover the outer engaging end portion 34b of the other plate member 30. can be done.

As shown in FIGS. 4 and 6, the ends of the plate member 30 in the longitudinal direction (Y direction) have the same configuration. The Y-direction end of the lower flange 31 is provided with an upper edge 31b that is flush with the height of the upper flange 32, and an inclined surface 31s that connects the upper edge 31b and the lower flange 31 with an inclination. ing. The Y-direction ends of the inner engaging end portion 34a and the outer engaging end portion 34b are provided with upper surface end portions and inclined surface portions 34as and 34bs, similarly to the lower flange 31. As shown in FIG.

As shown in FIGS. 6 and 7, the upper edge portion 31b located at the end of the lower flange 31 is provided with a plurality of ridges 31e. The ridge portion 31e extends in the longitudinal direction of the plate member 30 and protrudes downward from the upper surface edge portion 31b. Further, the end of the upper flange 32 is provided with a plurality of ribs 32e protruding upward. The rib 32e is provided at a position corresponding to the inclined surface portion 31s from the upper surface edge portion 31b.
When a conventional end-closed type plate member is turned upside down, the key groove located in the lower flange protrudes to the opposite side (downward) of the concrete side. Here, the conventional end-closed type plate member is a plate member having an inclined upper flange end portion and a flat portion having the same height as the lower flange. In the plate member 30 of this embodiment, the formation direction of the key groove 31a is opposite to that of the conventional end-closed plate member. Therefore, the plate member 30 is not a conventional end-closed plate member that is simply turned upside down.

(Structure of adjustment plate 40)
FIG. 8 shows a sectional view of the adjustment plate 40 provided between the plate member 30 and the girders 11. As shown in FIG. The adjusting plate 40 is an elongated object whose cross-sectional shape continues to the end, and includes 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 to have a height flush with the lower flange 31 and the upper flange 32 of the plate member 30, respectively. The inclined portion 42 connects one longitudinal end portion of the lower surface portion 41 and one longitudinal end portion of the upper surface portion 43 with an inclined surface. An engaging end portion 41 a having the same shape as the inner engaging end portion 34 a of the plate member 30 is provided at the end portion of the lower surface portion 41 . The engaging end portion 41a is configured to be engageable with the outer engaging end portion 34b of the plate member 30. As shown in FIG.
As shown in FIG. 2 , in this embodiment, the upper surface portion 43 of the adjustment plate 40 is placed on the girder 11 . Further, the engaging end portion 41a of the adjusting plate 40 is fitted into the outer engaging end portion 34b of the plate member 30, so that the adjusting plate 40 and the plate member 30 are integrated.

(Configuration of Accessory 50)
FIG. 9 shows a perspective view of the accessory 50 provided at the end of the girders 11 and the end of the girders 12 . This accessory 50 has a substantially rectangular upper surface portion 51 and side edge portions 53 . The side edge portion 53 is provided at one end in the longitudinal direction of the upper surface portion 51 . Note that the position of the side edge portion 53 and the notch 52 to be described later on the accessory 50 differs depending on the position (the positional relationship between the girders 11 and 12).

FIG. 10 is an explanatory diagram for explaining the positional relationship between the accessory 50 and the girders 11 and 12. As shown in FIG. The lower surface of the upper surface portion 51 of the accessory 50 abuts on the upper surfaces of the upper flanges 11f and 12f of the girders 11 and 12 . A notch 52 is formed in a portion corresponding to a pillar (not shown) on the upper surface portion 51 of the accessory 50 .

As shown in FIG. 9, the side edge portion 53 of the accessory 50 includes an upper surface side edge portion 53a, a lower surface side edge portion 53b, and an inclined side edge portion 53s. The upper surface side edge portion 53 a is at the same height as the upper surface portion 51 and continues to the upper surface portion 51 . The inclined edge portion 53s connects the upper surface side edge portion 53a and the lower surface side edge portion 53b with an inclined surface.
The accessory 50 also includes a connection surface portion 54 . The connecting surface portion 54 connects the end portion of the lower surface side edge portion 53b and the end portion of the upper surface portion 51 in a substantially vertical plane.

Further, the upper surface portion 51 of the accessory 50 is provided with a hill-shaped projecting portion 55 that projects upward at the end portion on the side of the upper surface side edge portion 53a. The protruding portion 55 is formed integrally with the upper surface portion 51 and has a rectangular parallelepiped block with an open bottom and inclined sides in the short direction. This projecting portion 55 is provided for integration with the concrete 26 formed above.

(Construction method of floor slab 10)
Next, a construction method for the composite slab 20 described above will be described.
As shown in FIG. 4, girders 11 and 12 are fixed to pillars (not shown) of the building. Then, the deck plate 21 is assembled and spanned between the girders 11 and 12. - 特許庁Before the deck plate 21 is bridged, a small beam 17 may be provided under the deck plate.

In assembling the deck plate 21, the plate members 30 are arranged in the width direction. In this case, by hooking the inner engaging end portion 34a of the plate member 30 so as to cover the outer engaging end portion 34b of the adjacent plate member 30, the plurality of plate members 30 are arranged in the X direction in an integrated state. .

Furthermore, an adjustment plate 40 is arranged between the plate member 30 and the girders 11 . In this case, the engaging end portion 41a of the lower surface portion 41 of the adjusting plate 40 is engaged with the outer engaging end portion 34b of the plate member 30, and the upper surface portion 43 of the adjusting plate 40 is placed on the upper flange 11f of the girders 11. place

Then, the accessory 50 is placed at the corner where the end of the girders 11 and the end of the girders 12 meet. In this case, the notch 52 is aligned with the post. Also, the accessory 50 is engaged with the adjusting plate 40 and the plate member 30 .
Next, the crack prevention bars 25 are arranged above the deck plate 21 assembled as described above. Further, stud bolts 15 are arranged on the girders 11 and 12 . Then, after placing concrete stoppers on the girders 11 and 12, concrete 26 is placed. After that, the girders 11 and 12 are coated with a fireproof covering material 16, and a floor finishing material 18 and a ceiling material 19 are arranged. As described above, the floor slab 10 shown in FIG. 1 is completed.

(Action)
In this embodiment, the ends of the deck plate 21 rest on the girders 11 , 12 so that the girders 11 , 12 support the composite slab 20 at the height of the upper flanges 32 of the deck plate 21 . This allows the girders 11 and 12 to support the composite slab 20 at the position (height) of the upper flange 32 of the deck plate 21 .

According to this embodiment, the following effects can be obtained.
(1) In this embodiment, the deck plate 21 is bridged between the girders 11 and 12 so that the girders 11 and 12 are supported by the upper flange 32 of the deck plate 21 of the composite slab 20 . As a result, the girders 11 and 12 can support the deck plate 21 at a position higher than the lower flange 31 of the deck plate 21, so the height of the upper surface position of the composite slab 20 with respect to the girders 11 and 12 can be lowered. . Therefore, since the distance from the ceiling to the floor can be shortened, the floor height can be lowered and the ceiling height can be increased. In addition, it can be constructed with the same time and effort as a synthetic slab using a conventional deck plate.

(2) In the present embodiment, the plate member 30 forming the deck plate 21 has an upper edge 31b at the end of the lower flange 31 and at the same height as the upper flange 32 . Therefore, by placing the top edge 31b on the girders 12, the girders 12 can support the deck plate 21 at the height of the upper flange 32 of the deck plate 21. As shown in FIG. Further, since the plate member 30 is provided with the key groove 31a protruding upward, the plate member 30 and the concrete 26 can be integrated to ensure the rigidity of the composite slab 20. As shown in FIG.

(3) In the present embodiment, the end portion of the plate member 30 has a projecting portion 31e protruding downward and a rib 32e protruding upward. Without these ridges 31e and ribs 32e, waves of concrete are generated at these portions, and the adhesion to the concrete 26 is deteriorated. Therefore, by providing the ridges 31e and the ribs 32e, bending of the concrete 26 when it is placed can be suppressed, and slag leakage of the concrete 26 can be suppressed. As a result, the strength of the synthetic slab 20 can be increased and the surface of the synthetic slab 20 can be made smooth.

(4) In this embodiment, the adjustment plate 40 is provided between the girders 11 and the plate member 30 in the width direction of the plate member 30 . The adjustment plate 40 includes a lower surface portion 41 having an engaging end portion 41a that engages the outer engaging end portion 34b of the lower flange 31 of the plate member 30, and a lower flange portion 41 having the same height as the upper flange 32 of the plate member 30. and an upper surface portion 43 . Thereby, the adjustment plate 40 can be used to adjust the interval between the girders 11 and the integrated plate members 30 .

(5) In this embodiment, the accessories 50 are arranged at positions where the ends of the girders 11 and 12 meet. As a result, even when the adjustment plate 40 having the same end portion as the cross-sectional shape is used, the concrete 26 can be placed while suppressing slag leakage at the corners of the girders 11 and 12 .

(6) In this embodiment, the thickness of the concrete 26 of the deck plate 21 is the same as the conventional one. The girders 11 and 12 support the deck plate 21 at the height of the upper flanges 32 . For this reason, small stud bolts 15 are arranged on the girders 11 and 12 so as to ensure sufficient covering thickness. Thereby, even if the stud bolt 15 is made small, the concrete 26 and the girders 11 and 12 can be integrated.

This embodiment can be implemented with the following modifications. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
- In the above embodiment, the plate member 30 is used for the deck plate 21 of the composite slab 20 . The plate member 30 has an upper edge portion 31 b having the same height as the upper flange 32 at the end portion in the extending direction (Y direction) of the lower flange 31 . Instead of such a plate member 30, a plate member in which uneven cross sections extend to both ends (not closed end type) may be used.

As shown in FIG. 11, a composite slab 60 may be constructed of a deck plate using a plate member 65 . The plate member 65 is a long member having an uneven cross-section as shown in FIG. 5 up to both ends, and has an upper flange 65a and a lower flange 65b. Then, a deck support member 62 is welded to the side surface of the upper flange 12f of the girder 12 that supports the composite slab 60. As shown in FIG. The deck support member 62 is composed of, for example, an angle (angle steel) having an L-shaped cross section. In this case, the deck support member 62 is positioned so that the horizontal surface of the deck support member 62 is located at a position 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. fixed at 12. 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 girders 12 reaches a height at which the lower surface of the upper flange 65a of the plate member 65 abuts. Furthermore, the end of the plate member 65 is brought into close contact with the vertical surface of the deck receiving material 62 . If there is a gap, install a concrete stopper. After arranging the crack prevention bars 25, the concrete 66 is placed. The composite slab 60 having such a configuration can be supported by the girders 12 at the height of the upper flanges 65a of the deck plates.

Also, the deck plate may be configured using a so-called conventional end-closed plate member. In this end-closed plate member, the end of the upper flange in the Y direction is the end of the lower surface at the same height as the lower flange.

For example, as shown in FIG. 12, a composite slab 67 using a plate member 68 may be used instead of the plate member 65 of FIG. This synthetic slab 67 rests a plate member 68 on deck support members 62 provided on the girders 12 . In this plate member 68, the Y-direction end of the upper flange 68a forms a lower surface end 68ab at the same height as the lower flange 68b. And this lower surface edge part 68ab is connected with the upper flange 68a via the inclined surface part 68s. When the end of the lower flange 68b of the plate member 68 is placed on the end of the horizontal portion of the deck support member 62, the upper surface of the upper flange 12f of the girders 12 becomes the lower surface of the upper flange 68a of the plate member 68. It is fixed to the girders 12 so as to be at the same height as . In addition, stud bolts may be erected on the upper surface of the deck support material 62 within the concrete 66 .

Further, as shown in FIG. 13, a composite slab 70 may be formed by a deck plate using a plate member 71 . The plate member 71 has a lower surface portion 71ab and an inclined surface portion 71s at the end portion in the extending direction of the upper flange 71a. The lower surface portion 71ab constitutes a 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 with an inclination.

Also, deck support members 75 and stiffeners 76 are welded to the webs 12w of the girders 12 that support the composite slab 70 . The deck support member 75 is a plate member extending in the extending direction of the girders 12, and protrudes horizontally from the web 12w. The deck support member 75 is provided at a position where the lower surface of the upper flange 71a of the plate member 71 is at the height of the upper surface of the girders 12 when the plate member 71 is supported on its upper surface. The stiffener 76 is provided in contact with the lower surface of the deck support material 75 to reinforce the deck support material 75 .

Then, the edge of the plate member 71 is supported by the deck support material 75 . Furthermore, a stud bolt 77 is arranged at the end of the outer side of the deck receiving material 75 (the side opposite to the web 12w). Furthermore, after placing the crack prevention bars 25 and concrete stoppers, concrete 78 is formed by placing concrete above the plate member 71 and the deck receiving material 75 . As a result, the composite slab 70 composed of the deck plate using the plate member 71 and the concrete 78 is completed. Therefore, this composite slab 70 can be supported by the girders 12 at the height of the upper flanges 71a of the deck plates.

- In the above-described embodiment, the ridges 31e and the ribs 32e formed on the upper surface of the plate member 30 constituting the deck plate 21 have a shape extending in the extending direction of the plate member 30 . The protrusions 31e and ribs 32e formed at the Y-direction end of the plate member 30 are not limited to these shapes. Any shape may be employed as long as it can suppress bending of the concrete 26 when it is placed and suppress leakage of slag from the concrete 26 without generating waves of the concrete. For example, it may be a ridge or rib that is divided into a plurality of pieces in the extending direction of the plate member 30 .

- In the above embodiment, the plate member 30 has two upper flanges 32 on both sides of the lower flange 31 . The plate member 30 forming the deck plate 21 is not limited to this shape. For example, a plate member shaped with one upper flange 32 and two lower flanges 31 may be used.

- In the above embodiment, the adjustment plate 40 and the accessory 50 are arranged between the plate member 30 and the beam 12 . Depending on the size of the deck plate 21 and the girders 11 and 12, the shape of 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 the shape of the accessory 50 may be changed to the end. It is also possible to use an adjustment plate provided in the , or to change these dimensions as appropriate. Furthermore, the accessory 50 is not limited to the shape described above, and the projecting portion 55 projecting upward may be omitted, or a plurality of such projecting portions may be provided.

- In the above embodiment, the girders 11 and 12 on which the composite slab 20 is supported are arranged in orthogonal directions. The large girders 11 and 12 that support the composite slab 20 are not limited to being perpendicular to each other. For example, they can be applied to a structure in which one beam is arranged in a different direction (for example, oblique direction) with respect to the other beam.

Next, technical ideas that can be grasped from the above embodiment and another example will be added below.
(a) The deck plate according to claim 2, which has a lower surface edge connected to the upper flange via an inclined portion at an end in a second direction orthogonal to the first direction. of synthetic slabs.
(b) the deck plate includes a plurality of plate members and an adjusting plate disposed between the plate member and the first beam;
The adjustment plate has an upper surface portion placed on the upper surface of the first beam, an end portion of the lower surface engaged with the lower flange, and a connecting portion connecting the upper surface portion and the end portion of the lower surface. 3. The composite slab of claim 1, 2 or (a).
(c) used in a synthetic slab comprising a deck plate having an uneven vertical cross-section in the first direction by means of an upper flange, a lower flange, and a connecting portion connecting them, and concrete integrally formed with the deck plate; A function provided at the end of the first beam and the end of the second beam that bridges the deck plate,
an upper surface portion abutting on the upper surface of the upper flange of the first beam and the upper surface of the upper flange of the second beam;
A side edge provided at one end in the longitudinal direction of the upper surface,
The side edge connects an upper surface side edge having the same height as the upper surface, a lower surface side edge corresponding to the height of the lower flange, and the upper surface side edge and the lower surface side edge. with sloping side edges,
A accessory, further comprising a connection surface portion connected to an end portion of the upper surface portion, an end portion of the lower surface side edge portion, and an end portion of the inclined side edge portion.

10... Floor slab 11, 12... Large girders 11f, 12f... Upper flanges of girders 12w... Web of girders 15, 77... Stud bolts 16... Fireproof coating material 17... Small girders 18... Floor finishing material, 19 Ceiling material 20,60,67,70 Synthetic slab 21 Deck plate 25 Crack prevention bar 26,66,78 Concrete 30,65,68,71 Plate member 31,65b, 68b, 71b... Lower flange 31a... Key groove 31b... Upper surface edge 31e... Ridge part 31s, 34as, 34bs, 68s, 71s... Inclined surface part 32, 65a, 68a, 71a... Upper flange of plate member , 32e, 32r... Ribs 33... Connecting parts 34a... Inner engaging end part 34b... Outer engaging end part 40... Adjusting plate 41, 71ab... Lower surface part 41a... Engaging end part 42... Inclination Part 43, 51 Upper surface portion 50 Accessory 52 Notch 53 Side edge 53a Upper surface side edge 53b Lower surface side edge 53s Inclined side edge 54 Connection surface portion , 55... Protruding part, 62, 75... Deck receiving material, 68ab... Lower surface end part, 76... Stiffener.

Claims (3)

A composite slab comprising a deck plate having an uneven vertical cross-section in a first direction due to an upper flange, a lower flange, and a connecting portion connecting them, and concrete integrally formed with the deck plate,
The deck plate is
A key groove protruding upward is formed on the upper surface of the lower flange,
having an upper edge connected from the lower flange via an inclined portion at an end in a second direction orthogonal to the first direction;
the top edge is at the same height as the top flange;
By resting the upper flange on a first beam and by resting the top edge on a second beam extending in a different direction than the first beam, the deck plate is formed into the first beam and the second beam. A composite slab that spans two beams. A composite slab comprising a deck plate having an uneven vertical cross-section in a first direction due to an upper flange, a lower flange, and a connecting portion connecting them, and concrete integrally formed with the deck plate,
The deck plate has a key groove protruding upward on the upper surface of the lower flange,
By placing the upper flange on a first beam and placing the lower flange on a deck support member fixed to a second beam extending in a direction different from that of the first beam, the deck plate is spanning the first beam and the second beam,
The deck support member 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. synthetic slabs. A plate member constituting a deck plate of a composite slab,
Having an uneven vertical cross section in the first direction due to the upper flange, the lower flange and the connecting portion connecting them,
having an upper edge connected from the lower flange via an inclined portion at an end in a second direction orthogonal to the first direction;
the top edge is at the same height as the top flange;
A plate member, wherein a key groove protruding upward is formed on an upper surface of the lower flange.

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