Composite deck slab structure and composite deck slab construction method

Abstract

To provide a composite deck slab structure and a composite deck slab construction method that have sufficient structural performance without embedding a deck plate in an RC beam.SOLUTION: A composite deck slab structure includes a deck plate with a raised portion extending in one direction on a surface thereof, a reinforced concrete (RC) or steel reinforced concrete (SRC) beam, and a concrete slab extending above the deck plate and the beam. In the deck plate, a rear surface at an end in the extension direction of the raised portion is exposed from the concrete of the beam over the entire surface in the direction perpendicular to the extension direction. The raised portion is embedded in the concrete slab.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a composite deck slab structure and a composite deck slab construction method to be installed on a beam made of reinforced concrete (RC) or steel reinforced concrete (SRC). [Background technology]

[0002] Traditionally, when applying a composite deck slab to a reinforced concrete or steel reinforced concrete beam, the beam and deck plate had to be embedded in the beam. For example, according to Ministry of Land, Infrastructure, Transport and Tourism Notification No. 326 of 2002, the embedding dimension of the deck plate in the reinforced concrete beam must be "3 cm or more in embedment length (1 cm at the end parallel to the direction of the steel plate groove)." However, this does not apply if existing stresses can be transmitted between the concrete poured into the steel plate and the reinforcing bars, welded wire mesh, or headed studs inside the concrete." For this reason, the current standard for connecting a reinforced concrete or steel reinforced concrete beam to a deck plate is to embed the deck plate 3 cm into the beam frame. Therefore, as shown in Non-Patent Document 1, in order to connect the deck plate to the reinforced concrete or steel reinforced concrete beam, it was necessary to increase the width of the deck plate to accommodate the embedment in the beam frame.

[0003] Non-patent document 1 discloses a method for constructing a composite deck slab in which, when joining a deck plate to a reinforced concrete or steel reinforced concrete beam, the longitudinal end of the deck plate is embedded into the concrete beam by at least 30 mm and the width by at least 10 mm. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] Deck Plate Floor Structural Design and Construction Standards 2018 Summary of the Invention [Problem to be solved by the invention]

[0005] On the other hand, the construction method of embedding a deck plate into the beam body as shown in Non-Patent Document 1 requires an additional section (extended section) in addition to the cross-sectional area of ​​the beam required for the structure due to the embedding of the deck plate, which has the problem of increased costs due to the increase in concrete material and compression of the interior space due to the increased protrusion.

[0006] The present invention was devised in consideration of the above-mentioned problems, and its purpose is to provide a composite deck slab structure and a composite deck slab construction method that does not require the deck plate to be embedded in the beams of a reinforced concrete or steel reinforced concrete structure and that has sufficient structural performance. [Means for solving the problem]

[0007] The deck composite slab structure of the first invention comprises a deck plate having a rising portion extending in one direction on its surface, a beam made of RC (Reinforced Concrete) or SRC (Steel Reinforced Concrete), and a concrete slab continuous above the deck plate and the beam, wherein the back surface of the deck plate at the end side in the extension direction of the rising portion is exposed from the concrete of the beam over the entire surface in a direction perpendicular to the extension direction, and the rising portion is embedded in the concrete slab.

[0008] The deck composite slab structure according to the second invention is characterized in that, in the first invention, the deck plate has a tapered rising portion in which the width between the side surfaces widens upward.

[0009] The deck composite slab construction method of the third invention is characterized in that a continuous concrete slab is poured above a deck plate having a raised portion extending in one direction on its surface and a beam made of RC (Reinforced Concrete) or SRC (Steel Reinforced Concrete), and the back surface of the end side of the extending direction of the raised portion of the deck plate is exposed from the concrete of the beam over the entire perpendicular direction perpendicular to the extending direction, and the raised portion is embedded in the concrete slab. [Effects of the Invention]

[0010] According to the first to third inventions, in the composite deck slab structure and the composite deck slab construction method, the rear surface of the end of the rising portion of the deck plate in the extension direction is exposed from the concrete of the beam over the entire surface in the direction perpendicular to the extension direction. Meanwhile, the rising portion is embedded in the concrete slab. This makes it possible to create a composite deck slab structure with sufficient structural performance without embedding the end of the deck plate in the beam of a reinforced concrete or steel reinforced concrete structure.

[0011] In particular, according to the second invention, the deck plate has a tapered rising section where the width between the side surfaces widens upward. This allows the rising section to be locked into the concrete slab when the side surfaces abut, so the deck plate is more firmly supported by the reinforced concrete or steel reinforced concrete beams via the concrete slab. This makes it easier to build a composite deck slab structure with sufficient structural performance without having to embed the deck plate ends into the reinforced concrete or steel reinforced concrete beams. [Brief explanation of the drawings]

[0012] [Figure 1] Fig. 1(a) is a cross-sectional view showing an example of a composite deck slab structure in the extension direction of the rising part of the deck plate according to this embodiment. Fig. 1(b) is a cross-sectional view showing an example of a composite deck slab structure in the orthogonal direction perpendicular to the extension direction according to this embodiment. [Figure 2] Figure 2(a) is a cross-sectional view showing an example of a composite deck slab structure in the extension direction of the rising part of the deck plate when the beam formwork according to this embodiment is removed. Figure 2(b) is a cross-sectional view showing an example of a composite deck slab structure in the orthogonal direction perpendicular to the extension direction when the beam formwork according to this embodiment is removed. [Figure 3] FIG. 3 is a perspective view showing an example of a deck composite slab according to this embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing an example of a deck composite slab according to this embodiment. [Figure 5] FIG. 5 is a cross-sectional view showing an example of a reinforcing rib (deck plate reinforcing rib shape) of the composite deck slab according to this embodiment. [Figure 6] Figure 6 is a diagram showing an example of a construction method for a deck composite slab according to this embodiment, where Figure 6(a) is a diagram showing the installation process, and Figure 6(b) is a diagram showing the pouring process. [Figure 7] FIG. 7 is a perspective view showing an example of a process for installing the composite deck slab according to this embodiment. [Figure 8] FIG. 8 is a cross-sectional view showing an example of a comparative composite deck slab used in the experiment. [Figure 9] Figure 9 is a graph showing the experimental results, where Figure 9(a) is a graph showing the experimental results of the deck composite slab of this embodiment, and Figure 9(b) is a graph showing the experimental results of the comparative deck composite slab. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, composite deck slab structures according to several embodiments will be described in detail with reference to FIGS. 1 to 6. FIG. 1(a) is a cross-sectional view showing an example of a composite deck slab structure 10 according to the present embodiment, in the extension direction x of the rising portion 4 of the deck plate 2. FIG. 1(b) is a cross-sectional view showing an example of a composite deck slab structure 10 according to the present embodiment, in the orthogonal direction y perpendicular to the extension direction x. FIG. 2(a) is a cross-sectional view showing an example of a composite deck slab structure 10 according to the present embodiment, in the extension direction x of the rising portion 4 of the deck plate 2, when the beam formwork 71 according to the present embodiment has been removed. FIG. 2(b) is a cross-sectional view showing an example of a composite deck slab structure 10 according to the present embodiment, in the orthogonal direction y perpendicular to the extension direction x, when the beam formwork 71 according to the present embodiment has been removed. FIG. 3 is a perspective view showing an example of a composite deck slab 1 according to the present embodiment. FIG. 4 is a cross-sectional view showing an example of a composite deck slab 1 according to the present embodiment. FIG. 5 is a cross-sectional view showing an example of a reinforcing rib (deck plate reinforcing rib shape) 43 of the composite deck slab 1 according to the present embodiment. FIG. 6 is a diagram showing an example of a construction method for the deck composite slab 1 according to this embodiment, with FIG. 6(a) showing the installation process and FIG. 6(b) showing the pouring process. The extension direction x is the direction in which the rising portion 4 of the deck plate 2 extends. The extension direction x may also be the longitudinal direction of the deck plate 2. The orthogonal direction y is a direction perpendicular to the extension direction x. The upward direction z is the vertical upward direction.

[0014] (Deck composite slab structure) As shown in Figures 1(a) and 1(b), the composite deck slab structure 10 comprises an RC beam 7 used in RC (Reinforced Concrete) or SRC (Steel Reinforced Concrete) buildings, and a composite deck slab 1 in which a concrete slab 53 is poured onto the surface 2a of a deck plate 2, the surface 2a of which has a rising portion 4 that extends in the vertical direction x and rises upward z, and is continuous with the RC beam 7 above z. Furthermore, as shown in Figure 1(b), the composite deck slab structure 10 may further comprise an adjustment plate 46 that is attached to the RC beam 7 and engages with the end of the deck plate 2 in the perpendicular direction y.

[0015] (RC beam) The RC beam 7 is a reinforced concrete beam or a steel-reinforced concrete beam used in RC or SRC buildings. The RC beam 7 is made of beam concrete 54, which is the concrete in the beam, as shown in Figures 1(a) and 1(b). The beam concrete 54 is formed by pouring concrete inside and above the beam formwork 71.

[0016] (Beam formwork) The beam formwork 71 is a formwork for a beam that opens upward z. The beam formwork 71 includes horizontal crosspieces 72 provided at the edge of the opening, vertical crosspieces 73 provided below the horizontal crosspieces 72, and thick beams 74 provided on the vertical crosspieces 73. The beam formwork 71, horizontal crosspieces 72, vertical crosspieces 73, and thick beams 74 are removed when the beam concrete 54 etc. has sufficiently hardened and completed their role as formwork.

[0017] (Deck composite slab) The composite deck slab 1 is used, for example, as a floor slab or roof slab of a structure. The composite deck slab 1 is formed by connecting multiple deck plates 2 and erecting them on a beam formwork 71. As shown in FIGS. 1(a) and 1(b), the composite deck slab 1 includes the deck plate 2 and a concrete slab 53 poured on the surface 2a of the deck plate 2. The composite deck slab 1 includes, for example, a composite deck slab as shown in FIG. 3.

[0018] (Deck plate) The deck plate 2 has a flat portion 3 and a rising portion 4. In this embodiment, only the flat portion 3 of the deck plate 2 is exposed on the underside. In this embodiment, as shown in Figures 2(a) and 2(b), the end 2c of the back surface 2b of the deck plate 2 in the extension direction x is exposed from the concrete beam 54 over the entire surface A in the perpendicular direction y, and the end 2c of the deck plate 2 is not embedded in the concrete beam 54.

[0019] (flat plate part) As shown in FIG. 3 , the flat plate portion 3 functions as a structural member for supporting a load and is formed in a flat plate shape. The flat plate portion 3 has a protrusion 31 for improving the rigidity of the flat plate portion 3. The protrusion 31 is a protrusion strip with a trapezoidal cross section that is bent along the extension direction x of the deck plate 2. The protrusion 31 is formed by rolling or the like. While the protrusion 31 that is a protrusion strip with a trapezoidal cross section is shown as an example, it may also be a protrusion strip with a triangular or polygonal cross section. In other words, the protrusion 31 provided on the flat plate portion 3 may be a protrusion or recess of another shape as long as it is an unevenness that can be bent along the extension direction x to increase the rigidity of the flat plate portion. Note that the protrusion 31 may be omitted.

[0020] (Rising part) 3, the rising portion 4 is bent from the flat plate portion 3 to rise upward z and extend in the extension direction x. The upper end of the rising portion 4 is located in z higher than the upper end of the convex portion 31 of the flat plate portion 3. The rising portion 4 has ribs (a first engagement rib 41 and a second engagement rib 42) rising from the end of the flat plate portion 3, and a reinforcing rib 43 provided between the first engagement rib 41 and the second engagement rib 42.

[0021] (Engagement rib) Of the engagement ribs, the first engagement rib 41 shown in Figure 4 rises perpendicularly to the flat plate portion 3. The first engagement rib 41 has the function of engaging with the second engagement rib 42 of another adjacent deck plate 2 to connect the deck plates 2 together.

[0022] The first engagement rib 41 is composed of a flat-shaped first web portion 41a that rises vertically to the surface of the flat portion 3, a rising inclined portion 41b that rises from the tip of the first web portion 41a and slopes inward (towards the reinforcing rib 43, the same below) upward z, a first flange portion 41c that continues horizontally from the tip of the rising inclined portion 41b, a jumping inclined portion 41d that slopes downward from the tip of the first flange portion 41c, and a guide inclined portion 41e that slopes from the tip of the jumping inclined portion 41d in the opposite direction to the jumping inclined portion 41d.

[0023] As shown in Figures 3 and 4, the first web portion 41a has multiple embossments 41f that protrude inward from the flat plate surface and are aligned parallel to each other at predetermined intervals. These embossments 41f are elongated protrusions that slope up and down when viewed horizontally, and serve to prevent misalignment at the interface between the deck plate 2 and the concrete 5 poured inside it. Because the protrusions of the embossments 41f slope up and down in this way, a single type of embossment can prevent misalignment in both the vertical and horizontal directions.

[0024] The corners at the joints of the first web portion 41a, the rising inclined portion 41b, the first flange portion 41c, the overhanging inclined portion 41d, and the guide inclined portion 41e are all curved and bent to form rounded corners. Of the engaging ribs, the second engaging rib 42 shown in FIG. 4 rises perpendicular to the flat plate portion 3.

[0025] The second engagement rib 42 is composed of a flat second web portion 42a that rises perpendicular to the surface of the flat portion 3, an upper inclined portion 42b that rises from the tip of this second web portion 42a and inclines inward upward z, and a downward inclined portion 42c that slopes downward from the tip of this upper inclined portion 42b.

[0026] Furthermore, the inclination height of the overhanging inclined portion 41d and the guide inclined portion 41e is higher than the inclination height of the upper inclined portion 42b, and the inclination angle of the overhanging inclined portion 41d and the guide inclined portion 41e is different from and gentler than the inclination angle of the upper inclined portion 42b. Therefore, when the deck plate 2 is slid horizontally over the placed steel material or the like, the overhanging inclined portion 41d and the guide inclined portion 41e easily climb over the upper inclined portion 42b and the lower inclined portion 42c, making it easier for the first engagement rib 41 to engage with the second engagement rib 42 of another deck plate 2.

[0027] Furthermore, the inclination of the overhanging inclined portion 41d is inclined in the same direction and at approximately the same angle as the downward inclined portion 42c. Therefore, when the first engagement rib 41 engages with the second engagement rib 42 of the other deck plate 2, a load is applied in a direction that presses the first engagement rib 41 and the second engagement rib 42 of the other deck plate 2 due to the weight of the deck plate 2 with the inclination of the overhanging inclined portion 41d and the downward inclined portion 42c, allowing the deck plates 2 to tightly engage with each other. This prevents cement components from hardening due to leakage during concrete pouring, resulting in the adhesion of dirt that is difficult to remove to the underside of the deck plate 2.

[0028] Furthermore, when the second engagement rib 42 engages with the first engagement rib of another deck plate 2, the upward inclined portion 42b and the rising inclined portion 41b form tapered side surfaces that widen in the upward direction z. This allows the upward inclined portion 42b and the rising inclined portion 41b to engage with the concrete 5, thereby more firmly supporting the deck plate 2.

[0029] As shown in FIGS. 3 and 4, the second web portion 42a is formed with a plurality of embossments 42d that protrude inward from the flat surface and are arranged in parallel at predetermined intervals, similar to the embossments 41f.

[0030] As shown in Figures 3 and 4, similar to the first engagement rib 41, the corners at the joints of the second web portion 42a, the upper inclined portion 42b, and the lower inclined portion 42c of the second engagement rib 42 are all curved and bent to form rounded corners.

[0031] As shown in Figures 3 and 4, the reinforcing rib 43 is a rib that reinforces the deck plate 2. The reinforcing rib 43 is vertically installed in the center of the deck plate 2 facing upward z, and is composed of an overlapping portion 44 where two flat steel plates overlap, and a reinforcing portion 45 with a triangular cross section formed at the tip of this overlapping portion 44, and has the function of improving the bending rigidity of the flat plate portion 3 in the upward z direction.

[0032] Furthermore, the reinforcing rib 43 is not limited to a reinforcing portion 45 with a triangular cross section, and may have a tapered or flask-shaped reinforcing portion 45 in which the width t in the perpendicular direction y between the side surfaces 45a increases upward in the z direction, as shown in Fig. 5. For example, as shown in Fig. 5(a), the reinforcing rib 43 may be configured with a reinforcing portion 45 with a triangular cross section provided in the center of the deck plate 2, upward in the z direction, without the overlapping portion 44.

[0033] Furthermore, as shown in Figure 5(b), the reinforcing rib 43 may be configured, for example, as follows: an overlapping portion 44 extending upward z from the center of the deck plate 2, in which two flat steel plates are spaced apart; and a reinforcing portion 45 formed at the tip of the overlapping portion 44, which has tapered side surfaces 45a with a width t in the perpendicular direction y between the side surfaces 45a increasing upward z.

[0034] Furthermore, as shown in Figure 5(c), the reinforcing rib 43 may be composed of an overlapping portion 44 that is vertically extended upward z in the center of the deck plate 2 so that the width s of the two flat steel plates in the perpendicular direction y narrows, and a reinforcing portion 45 that is formed at the tip of this overlapping portion 44 and has tapered side surfaces 45a where the width t between the side surfaces 45a increases upward z.

[0035] In addition, the reinforcing rib 43 may be configured with a T-shaped cross section, as shown in Figure 5(d), for example, consisting of an upper portion 47a extending vertically upward z and flange portions 48a extending horizontally from the tip of this upper portion 47a on both sides.

[0036] In addition, the reinforcing rib 43 may be configured with an L-shaped cross section, for example, as shown in Figure 5(e), consisting of an upper portion 47b that is suspended upward z and a flange portion 48b that continues from the tip of this upper portion 47b to only one side in the horizontal direction.

[0037] In addition, the reinforcing rib 43 may be configured to have a Z-shaped cross section, for example, as shown in Figure 5(f), with an upper portion 47c that rises at an incline toward the upward z direction, and a flange portion 48c that continues from the tip of this upper portion 47c in the horizontal direction opposite to the inclination direction of the upper portion 47c.

[0038] (concrete) The concrete 5 may be a mixture of cement, fine aggregate, coarse aggregate, water, admixtures, etc. As shown in Figures 1(a) and 1(b), the concrete 5 is poured from the front surface 2a of the deck plate 2 and from the inside of the beam formwork 71 upward toward z, and then hardened after a predetermined time has passed. The concrete 5 is formed by the continuous integration of a concrete slab 53 poured on the front surface 2a of the deck plate 2 and a beam concrete 54 poured from the inside of the beam formwork 71 upward toward z.

[0039] As shown in Fig. 4, concrete slab 53 has reinforcing bars 55 provided inside it above deck plate 2 z, with a covering thickness of, for example, 30 mm or more, as needed. Furthermore, concrete slab 53 has welded wire mesh 51 provided inside it as needed. Concrete slab 53 has a thickness of, for example, about 150 mm.

[0040] The rising portion 4 comes into contact with the concrete slab 53. In this embodiment, the first engaging rib 41, the second engaging rib 42, and the reinforcing rib 43 come into contact with the concrete slab 53 and are embedded therein.

[0041] As shown in FIG. 4, the reinforcing bars 55 are steel bars that reinforce the concrete slab 53. As shown in FIG. 4, the welded wire mesh 51 supports tensile forces and prevents cracks in the concrete 5. The reinforcing bars 55 and the welded wire mesh 51 are well-known types used for slab concrete. The welded wire mesh 51 is a wire mesh made of round steel bars and deformed steel bars of a predetermined diameter or larger welded together in a grid pattern at a predetermined pitch. The welded wire mesh 51 can be replaced with a combination of deformed steel bars that are bound together.

[0042] (adjustment plate) As shown in Figures 6(a) and 6(b), the adjustment plate 46 is a flat plate provided to fill the gap in the orthogonal direction y between the RC beam 7 and the deck plate 2. The adjustment plate 46 is a flat plate provided above the cross beam 72 and engages with the end of the deck plate 2 in the orthogonal direction y. The adjustment plate 46 may be, for example, either a first adjustment plate 46a that engages with the first engagement rib 41 or a second adjustment plate 46b that engages with the second engagement rib 42.

[0043] (1st adjustment plate) The first adjustment plate 46a is provided, for example, on the upper side of the crosspiece 72 and is composed of a first installation portion 461 extending inward, a first inclined portion 462 rising outward and upward z from the inner tip of the first installation portion 461, and a first engagement portion 463 extending inward from the tip of the first inclined portion 462, etc.

[0044] The inclination height of the first inclined portion 462 is greater than the inclination height of the first web portion 41a and the rising inclined portion 41b. The first engagement portion 463 comes into contact with the upper side of the first flange portion 41c. Therefore, when attaching the first adjustment portion 46a to the deck plate 2, the first inclined portion 462 easily climbs over the first web portion 41a and the rising inclined portion 41b, and the first engagement portion 463 can easily come into contact with the upper side of the first flange portion 41c, making it easier to engage the first adjustment portion 46a with the first engagement rib 41.

[0045] (2nd adjustment plate) The second adjustment plate 46b is provided, for example, on the upper side of the crosspiece 72 and is composed of a second installation portion 464 extending inward, a vertical portion 465 rising vertically from the inner tip of the second installation portion 464 toward the upward z direction, a second inclined portion 466 rising in an inclined manner from the tip of the vertical portion 465 toward the inner upper z direction, and a second engagement portion 467 extending inward from the tip of the second inclined portion 466.

[0046] Furthermore, the height of the vertical portion 465 is greater than that of the second web portion 42a, and the inclination height of the second inclined portion 466 is greater than that of the upper inclined portion 42b. Furthermore, the inclination of the second inclined portion 466 is inclined in the same direction and at approximately the same angle as that of the upper inclined portion 42b. Therefore, when the second adjustment portion 46b is provided on the deck plate 2, the second inclined portion 466 and the second engagement portion 467 easily overcome the upper inclined portion 42b, making it easier for the second adjustment portion 46b to engage with the second engagement rib 42.

[0047] (Construction method for composite deck slab structure) Next, a construction method for the composite deck slab structure 10 according to this embodiment will be described with reference to Figures 6 and 7. Figure 7 is a perspective view showing an example of a process for installing the composite deck slab 1 according to this embodiment.

[0048] First, in the installation process, the deck plate 2 is installed between beam formwork 71 as shown in Figure 7. For example, the end 2c of the deck plate 2 in the extension direction x is installed above the crosspiece 72. In this case, the deck plate 2 is installed so that the end 2c of the deck plate 2 in the extension direction x does not protrude into the opening 71a of the beam formwork 71. Furthermore, multiple deck plates 2 may be connected by engaging the second engaging rib 42 with the first engaging rib 41 of another deck plate 2.

[0049] 6(a), if there is a gap between the deck plate 2 and the RC beam 7 in the orthogonal direction y, an adjustment plate 46 may be provided between the deck plate 2 and the RC beam 7. In such a case, for example, the first engagement rib 41 may be engaged with the first adjustment plate 46a provided on each of the RC beams 7 on both sides, and the second engagement rib 42 may be engaged with the second adjustment plate 46b. The adjustment plate 46 is also provided so as not to protrude into the opening 71a of the beam formwork 71.

[0050] 4, reinforcing bars 55 and welded wire mesh 51 are installed above the deck plate 2 in the z direction. In this case, reinforcing bars 55 may be installed above the spacers 52 provided on the surface of the deck plate 2 in the z direction, as shown in FIG.

[0051] Next, in the process of pouring concrete 5, as shown in FIG. 6(b), concrete 5 is poured from above z on the deck plate 2 and the beam formwork 71. As a result, the concrete slab 53 above the deck plate 2 and the beam concrete 54 inside and above z on the beam formwork 71 are continuously and integrally formed at the same time. The rising portion 4 and the welded wire mesh 51 are embedded in the concrete slab 53. After the concrete 5 has sufficiently hardened, the beam formwork 71 and the like may be removed.

[0052] This completes the construction method for the deck composite slab 1.

[0053] In this embodiment, as shown in Figures 2(a) and 2(b), the end 2c of the back surface 2b of the deck plate 2 in the extension direction x is exposed from the concrete beam 54 over the entire surface A in the perpendicular direction y. Also, in this embodiment, the rising portion 4 is embedded in the concrete slab 53. This allows the deck plate 2 and the concrete beam 54 to be integrated without embedding the deck plate 2 in the concrete beam 54. This makes it possible to provide a composite deck slab structure 10 that has sufficient structural performance without embedding the deck plate 2 in the reinforced concrete beam 7.

[0054] In this embodiment, as shown in Fig. 4, the deck plate 2 has a tapered rising portion 4 in which the width t between the side surfaces 45a widens upward z. As a result, the side surfaces 45a come into contact with the concrete slab 53, thereby locking the rising portion 4 into the concrete slab 53. Therefore, as shown in Figs. 2(a) and 2(b), the deck plate 2 and the concrete beam 54 can be more firmly integrated without embedding the deck plate 2 in the concrete beam 54.

[0055] In this embodiment, as shown in Figures 6(a) and 6(b), the adjusting plate 46 is provided so as not to protrude into the opening 71a of the beam formwork 71. As a result, when the concrete 5 is poured, the adjusting plate 46 is exposed from the concrete beam 54. This makes it possible to provide a composite deck slab structure 10 that has sufficient structural performance without embedding the adjusting plate 46 in the concrete beam 54.

[0056] Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. Furthermore, the present invention can be embodied in various novel forms in addition to the above-described embodiments. Therefore, various omissions, substitutions, and modifications are possible in the above-described embodiments without departing from the spirit of the present invention. Such novel forms and modifications are included within the scope and spirit of the present invention, as well as within the scope of the inventions set forth in the claims and equivalents of the inventions set forth in the claims. Examples of the Invention

[0057] Next, an experiment conducted as an example using the composite deck slab 1 of this embodiment will be described with reference to FIGS. 8 and 9. FIG. 8 is a cross-sectional view showing an example of a comparative composite deck slab 101 used in the experiment. FIG. 9 is a graph showing the experimental results, with FIG. 9(a) being a graph showing the experimental results for the composite deck slab according to this embodiment, and FIG. 9(b) being a graph showing the experimental results for the comparative composite deck slab 101. In FIG. 9, the composite effect confirmation index judgment reference value is a reference load value for determining whether the composite effect required for the structural performance of the composite deck slab can be maintained up to 1.50 times the normal load value. The composite effect confirmation index load is the upper load limit at which it can be determined that the composite deck slab maintains the composite effect. The total equivalent section is the total equivalent cross-sectional stiffness gradient of the composite deck slab. The effective equivalent section is the effective equivalent cross-sectional stiffness gradient of the composite deck slab. The 1 / 3 total equivalent section is 1 / 3 of the gradient of the total equivalent cross-sectional stiffness of the composite deck slab.

[0058] An experiment using the composite deck slab 1 of this embodiment was conducted under a simply supported, two-line concentrated load, as specified in the "Composite Effect Verification Experiment" in the Architectural Institute of Japan's "Design Guidelines for Composite Structures and Commentary, 2010 Revision," Volume 2, "Design Guidelines for Composite Slabs." The composite effect was evaluated in accordance with the "Composite Effect Verification Experiment" in the Architectural Institute of Japan's "Design Guidelines for Composite Structures and Commentary, 2010 Revision," Volume 2, "Design Guidelines for Composite Slabs." The experiment was also conducted on the composite deck slab 1 of this embodiment and a comparative composite deck slab 101, in which the deck plate 2 was embedded 30 mm into the reinforced concrete beam 7, a distance f from the end 2c of the deck plate 2, as shown in Figure 8.

[0059] As shown in Figure 9(a), the composite effect confirmation index load of the composite deck slab 1 of this embodiment greatly exceeds the composite effect confirmation index judgment standard. Furthermore, as shown in Figures 9(a) and 9(b), no significant difference in composite effect is observed between the use of the composite deck slab 1 of this embodiment and the comparative composite deck slab 101 in which the length f from the end 2c of the deck plate 2 is embedded 30 mm into the RC beam 7. These findings demonstrate that sufficient structural performance is achieved even when the composite deck slab 1 of this embodiment is used. [Explanation of symbols]

[0060] 1: Deck composite slab 10: Deck composite slab structure 101: Comparative deck composite slab 2: Deck plate 3: Flat plate part 31: Convex part 4: Rising section 41: First engagement rib 42: Second engagement rib 43: Reinforcement rib 44: Overlapped area 45: Reinforcement 46: Adjustment plate 47: Upper part 48 ; Flange part 461: 1st installation part 462: 1st slope 463: First engagement part 464:Second installation part 465: Vertical part 466:Second slope 467: Second engagement part 5: Concrete 51: Welded wire mesh 52: Spacer 53: Concrete slab 54: Concrete beam 55: Reinforcement 7:RC beam 71: Beam formwork 72: Horizontal crosspiece 73: Vertical crosspiece 74: Thick lumber

Claims

1. A deck plate having a rising portion on its surface extending in one direction; A beam made of reinforced concrete (RC) or steel reinforced concrete (SRC), a concrete slab continuous above the deck plate and the beam; The deck plate has a back surface on an end side in the extension direction of the rising portion exposed from the concrete of the beam over the entire surface in a direction perpendicular to the extension direction, The rising portion is embedded in the concrete slab. The deck features a composite slab construction.

2. The deck plate has a tapered rising portion in which the width between the side surfaces increases upward. The composite deck slab structure according to claim 1.

3. A continuous concrete slab is poured above a deck plate having a rising portion extending in one direction on its surface and a beam made of reinforced concrete (RC) or steel reinforced concrete (SRC), and the back surface of the end side of the extending direction of the rising portion of the deck plate is exposed from the concrete of the beam over the entire surface in the direction perpendicular to the extending direction, and the rising portion is embedded in the concrete slab. A deck composite slab construction method characterized by:

Images