Composite beam, building structure body, and construction method of building structure body

Abstract

To provide a composite beam that can reduce a cross section of a beam, a building structure body providing the composite beam, and a construction method of the building structure body.SOLUTION: A composite beam 10 comprises: a first beam 11 extending to a first direction; deck plates 19 fixed to the first beam 11, and having the first direction as a span direction and a second direction orthogonal to the first direction as a width direction; and a first concrete 14 that is precast to the first beam 11 and the deck plates 19 to integrate the first beam 11 and the deck plates 19 and extends to the first direction. A building structure body 1 comprises second beams 2 extending to the first direction from columns 5, third beams 3 extending to the second direction from the columns 5, and composite beam 10 fixed to the third beams 3, and an area of cross section of the first beam 11 in a third direction is smaller than an area of cross section of the second beam 2 in the third direction. A construction method of a building structure body comprises a preparation step P1 of preparing the composite beam 10 and a composite beam fixation step P2 of fixing the composite beam 10 to the beam extending to the second direction from the column 5.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a composite beam, an architectural structure, and a method for constructing an architectural structure, and more particularly to a composite beam, an architectural structure including columns and beams, and a method for constructing the architectural structure. [Background technology]

[0002] 2. Description of the Related Art Conventionally, composite beams in which a steel beam and a concrete slab are integrated together have been known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2018 / 151281 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the composite beam as described in Patent Document 1 is constructed at a construction site by constructing a framework consisting of columns and beams, and then pouring and curing concrete on the beam. Therefore, in the past, in such composite beams, in order to prevent the beam from being deformed by the load of the concrete before solidification, it was necessary to enlarge the cross section of the beam so that it has the strength and rigidity to support the load of the concrete before solidification. However, on the other hand, after the concrete has solidified, the strength and rigidity of the beam is often not required to be the same as before the concrete has solidified. Thus, in the past, when constructing an architectural structure using a composite beam, it was necessary to prepare a beam with an unnecessarily large cross section from the viewpoint of after the concrete has solidified.

[0005] The present invention has been made in consideration of the above points, and one of its objectives is to provide a composite beam that can reduce the cross-section of the beam, an architectural structure including such a composite beam, and a method for constructing such an architectural structure. [Means for solving the problem]

[0006] (1): The composite beam of the present invention comprises a first beam extending in a first direction, a first deck plate fixed to the first beam and having the first direction as its span direction and a second direction intersecting the first direction as its width direction, and a first concrete that is precast on the first beam and the first deck plate to be integrated with the first beam and the deck plate and extend in the first direction.

[0007] (2): In (1), the composite beam may include one or more piece members extending in the second direction from at least one side of the first beam in the second direction, and the length of the piece members in the second direction may be shorter than the length of the first beam in the first direction.

[0008] (3): In (2), a height of the piece member may be lower than a height of the first beam in a third direction perpendicular to both the first direction and the second direction.

[0009] (4) In (2) or (3), the width of the first concrete in the second direction may be shorter than the length of the piece member.

[0010] (5): In any one of (2) to (4), the piece member may be located at or near an end of the deck plate in the first direction.

[0011] (6): The architectural structure of the present invention comprises a second beam extending in the first direction, a third beam extending in the second direction, and a composite beam of (1) fixed to the third beam, wherein the cross-sectional area of ​​the first beam in a third direction perpendicular to both the first direction and the second direction is smaller than the cross-sectional area of ​​the second beam in the third direction.

[0012] (7): In (6), the architectural structure may further include a second concrete aligned with the first concrete in the second direction, and there may be a boundary between the first concrete and the second concrete.

[0013] (8): In (6) or (7), the architectural structure may further include a fourth beam extending in the second direction from the second beam. In this case, the composite beam may include one or more piece members extending in the second direction from at least one side in the second direction of the first beam, and the fourth beam and the piece members may be fixed to each other.

[0014] (9): In any one of (6) to (8), the composite beam may be fixed to the center of the third beam in the second direction.

[0015] (10): The method for constructing an architectural structure of the present invention includes a preparation step of preparing any of the composite beams described above, and a composite beam fixing step of fixing the composite beam to a beam extending in the second direction.

[0016] (11): In (10), it is preferable that the method for constructing an architectural structure further includes a deck plate fixing step of arranging a second deck plate other than the first deck plate of the composite beam next to the composite beam in the second direction and fixing the second deck plate to the beam, and a concrete pouring step of pouring a second concrete other than the first concrete onto the second deck plate. Effect of the Invention

[0017] According to the present invention, there are provided a composite beam that can reduce the cross section of the beam, an architectural structure including the composite beam, and a method for constructing the architectural structure. [Brief description of the drawings]

[0018] [Figure 1] 1 is a plan view showing an architectural structure according to the present invention; [Diagram 2]FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] FIG. 2 is a cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 2 is a flow diagram showing a method for constructing the architectural structure shown in FIG. [Diagram 5] FIG. 5 is a plan view showing a composite beam relating to the preparation step shown in FIG. [Figure 6] FIG. 6 is a plan view showing a beam structure for fixing the composite beam shown in FIG. 5. [Figure 7] FIG. 5 is a plan view showing the state immediately after the composite beam fixing step shown in FIG. 4. [Figure 8] FIG. 5 is a plan view showing one process of the deck plate fixing step shown in FIG. 4. [Figure 9] FIG. 5 is a plan view showing the state immediately after the deck plate fixing step shown in FIG. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, embodiments for carrying out the composite beam, the architectural structure including the composite beam, and the method for constructing the architectural structure according to the present invention will be illustrated with the attached drawings. The embodiments illustrated below are intended to facilitate understanding of the present invention, and are not intended to limit the interpretation of the present invention. The present invention can be modified or improved from the following embodiments without departing from the spirit of the present invention. In addition, in the above attached drawings, the dimensions of each member may be exaggerated or reduced, or hatching may be omitted, in order to facilitate understanding.

[0020] FIG. 1 is a plan view showing an architectural structure according to this embodiment, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III in FIG.

[0021] As shown in FIG. 1 to FIG. 3, the architectural structure 1 according to this embodiment includes two beams 2 (steel frames) extending in a first direction, two beams 3 (steel frames) extending in a second direction intersecting the first direction, four columns 5 extending in a vertical direction (third direction) perpendicular to the first and second directions, a composite beam 10 including a first concrete 14, and second concretes 7, 7 on both sides of the composite beam 10 in the second direction. In this embodiment, the four columns 5 are located at the vertices of a square or rectangle when viewed from the vertical direction. From each of the four columns 5, one beam 2 extends in the first direction, and one beam 3 extends in the second direction. The two beams 2, 2 are spaced apart in the second direction, and the two beams 3, 3 are spaced apart in the first direction. In this embodiment, the beams 2, 3 are H-shaped steel, but are not limited thereto, and may be, for example, C-shaped steel or L-shaped steel.

[0022] In addition, the architectural structure 1 may have a configuration in which the pillar 5 is omitted and the beams 2, 3 are extended to the portion where the pillar 5 was located.

[0023] The composite beam 10 has a rectangular shape with its long side in the first direction and its short side in the second direction when viewed from the vertical direction. The composite beam 10 is fixed to each of the two beams 3, 3 and spans the beams 3, 3. The composite beam 10 includes one beam 11 extending in the first direction, a deck plate 19 (first deck plate) fixed to the beam 11, and concrete 14 (first concrete) extending in the first direction. In this embodiment, the beam 11 is an H-shaped steel, but is not limited thereto and may be, for example, a C-shaped steel or an L-shaped steel.

[0024] In the following, the beam 11 of the composite beam 10 will be referred to as the first beam 11, the beam 2 described above as the second beam 2, and the beam 3 described above as the third beam 3, respectively.

[0025] The composite beam 10 of this embodiment includes one or more (four in this embodiment) piece members 12, 13 extending in the second direction from both side portions in the second direction of the first beam 11. The four piece members 12, 13 include two piece members 12, 12 and two piece members 13, 13. In this embodiment, the piece members 12, 12 and the piece members 13, 13 each have the same shape and size except for the position where they are arranged. In this embodiment, the four piece members 12, 13 are arranged at approximately equal intervals along the first direction, but they do not necessarily have to be at equal intervals. The piece members 13, 13 are fixed to both ends of the first beam 11 in the first direction. The piece members 12, 12 may be between the piece members 13, 13 in the first direction and fixed to the first beam 11. In this embodiment, the piece members 12, 13 are H-shaped steel, but are not limited to this and may be, for example, C-shaped steel or L-shaped steel.

[0026] In addition, if the distance in the second direction between the end AT of the piece members 12, 13 extending to one side from one side of the first beam 11 and the end BT of the piece members 12, 13 extending to the other side from the other side of the first beam 11 is defined as the "length WP of the piece members in the second direction" (hereinafter simply referred to as "length WP"), then the length WP of each of the piece members 12, 13 is shorter than the length BL of the first beam 11 in the first direction.

[0027] The piece members 12 and 13 may be provided on only one side or the other side in the second direction of the first beam 11. In this case, the distance in the second direction between the end of the piece member opposite the first beam 11 side and the end of the first beam 11 opposite the side to which the piece member is fixed is the length WP of the piece member.

[0028] In this embodiment, the height (length in the vertical direction) of the piece members 12, 13 is smaller than the height (length in the vertical direction) of the first beam 11.

[0029] Thus, in this embodiment, since the dimensions of each of the piece members 12, 13 are smaller than the dimensions of the first beam 11, it is expected that, for example, the increase in weight of the composite beam 10 due to the piece members 12, 13 will be suppressed, and interference between the piece members 12, 13 and other members when transporting the composite beam 10 will be suppressed, thereby improving the handleability of the composite beam 10.

[0030] Meanwhile, focusing on the web 11W of the first beam 11, in this embodiment, a gusset plate 11G is welded to a position where the piece members 12, 13 are fixed. Each of the piece members 12, 13 may be fixed to the first beam 11, for example, by fixing the webs 12W, 13W of the piece members 12, 13 to the gusset plate 11G using fasteners 15 such as bolts and nuts. Note that the method of fixing the piece members 12, 13 to the first beam 11 is not limited to this.

[0031] As shown in FIG. 2 and FIG. 3, the composite beam 10 includes two deck plates 19, 19 fixed to both ends of the first beam 11 in the second direction. Each of the two deck plates 19 has approximately the same shape and size. Each of the deck plates 19, 19 has a span direction in the first direction and a width direction in the second direction, and is formed in a rectangular shape when viewed in the vertical direction. In this embodiment, each of the deck plates 19, 19 is formed so that a peak portion and a valley portion are continuous along the second direction. The valley portions of each of the deck plates 19, 19 are fixed to the upper flange 11FU of the first beam 11, the upper flange 12FU of the piece member 12, and the upper flange 13FU of the piece member 13, for example, by welding. The deck plate 19 may be a flat deck. In this embodiment, the deck plate 19 is not attached to the upper flange 11FU except for both ends and their vicinity in the second direction of the upper flange 11FU of the first beam 11, but is not limited to this. In this embodiment, the length of the deck plate 19 in the first direction is equal to the length BL (see FIG. 1) of the first beam 11. However, the length of the deck plate 19 in the first direction may be longer or shorter than the length BL of the first beam 11.

[0032] A wire mesh 17 is arranged on the deck plate 19 and the upper flange 11FU via, for example, a spacer (not shown), and concrete 14 is laid so that the wire mesh 17 is embedded. The wire mesh 17 may be reinforcing bars. When viewed from above in the vertical direction, the concrete 14 completely covers the deck plates 19, 19 and the upper flange 11FU. The concrete 14 extends in a first direction, and the length of the concrete 14 in the first direction is equal to the length BL of the first beam 11, and the width (length in the second direction) of the concrete 14 is shorter than the length WP of the piece members 12, 13.

[0033] In addition, the deck plate 19, the first beam 11, the piece members 12, 13, etc. are covered from above with concrete 14, and therefore cannot be seen in a plan view. However, for the sake of explanation, in FIG. 1, the first beam 11 and the piece members 12, 13 are shown as seen through the concrete 14.

[0034] Meanwhile, the wire mesh 17 (or reinforcing bars) may protrude outward from the concrete 14 in at least one of the first and second directions (see FIG. 3). In this way, the wire mesh 17 of the composite beam 10 and a wire mesh (e.g., wire mesh 9 described later) laid on-site can be overlapped, and the concrete 14 of the composite beam 10 and the concrete (e.g., concrete 7) poured on-site can be more firmly bonded together.

[0035] The concrete 14 is integrated with the first beam 11 and the deck plate 19. In this embodiment, a plurality of studs 18 are welded to the upper flange 11FU of the first beam 11, the upper flange 12FU of the piece member 12, and the upper flange 13FU of the piece member 13, etc. In this embodiment, the concrete 14 is integrated with the first beam 11 and the deck plate 19 via these studs 18. Furthermore, this concrete 14 is not poured and cured at the construction site of the building including the architectural structure 1, but is poured and cured in a factory, i.e., is precast. The composite beam 10 may be precast, for example, through the following steps. That is, in the above-mentioned factory, a process of fixing the first beam 11, the piece members 12, 13, and the deck plate 19 to each other as described above is performed, followed by a process of welding studs 18 onto the first beam 11, the piece members 12, 13, and the deck plate 19, and then a process of pouring and curing concrete 14 onto the first beam 11, the piece members 12, 13, and the deck plate 19, thereby manufacturing the composite beam 10.

[0036] In the factory, the beams (steel frames) can be supported using the factory equipment. Therefore, even if the beams have lower rigidity and strength than when the concrete 14 is poured and cured at the construction site, the load of the concrete 14 before solidification is supported and deformation of the beams is prevented. Therefore, the area of ​​the cross section (cross section in the vertical direction) of the first beam 11 of the composite beam 10 can be made smaller than that when the concrete 14 is poured and cured at the construction site. In this embodiment, as shown in FIG. 2, the area of ​​the cross section of the first beam 11 is smaller than the area of ​​the cross section of the second beam 2 extending from the column 5 in the first direction (i.e., extending parallel to the first beam 11).

[0037] As shown in FIG. 3, when focusing on the web 3W of the third beam 3, in this embodiment, a gusset plate 3G is welded to the position where the first beam 11 is fixed. In this embodiment, the gusset plate 3G is welded to the center part in the second direction of the third beam 3. The composite beam 10 may be fixed to the third beam 3, for example, by fixing the web 11W of the first beam 11 to the gusset plate 3G using fasteners 103 such as bolts and nuts. In this way, in this embodiment, the composite beam 10 is fixed to the center of the third beam 3 in the second direction.

[0038] Here, when focusing on the third beam 3 to which the composite beam 10 is fixed, the center in the second direction tends to bend most easily. Therefore, when the first beam 11 is fixed to the center of the third beam 3, the first beam 11 also tends to bend due to the bending of the third beam 3. If concrete is poured at a construction site on the first beam 11 fixed to the center of the third beam 3, the concrete being cured on the first beam 11 tends to crack due to the influence of the bending of the first beam 11 caused by the bending of the third beam 3. However, according to the composite beam 10, the concrete 14 has already been precast on the first beam 11, and the rigidity is enhanced, so that cracks in the concrete in the center and its vicinity in the second direction of the architectural structure 1 are suppressed.

[0039] As described above, the composite beam 10 may be fixed to a position shifted from the center of the third beam 3 in the second direction.

[0040] As shown in FIG. 1 and FIG. 2, in this embodiment, the architectural structure 1 further includes a plurality of (four in this embodiment) fourth beams 4. In this embodiment, the fourth beams 4 are H-shaped steel and have a cross section (cross section in the third direction) of the same shape and dimensions as the cross section of the piece member 12 of the composite beam 10. Two of the four fourth beams 4 are fixed to the second beam 2 on one side in the second direction and extend to the other side in the second direction toward the composite beam 10. In this embodiment, these two fourth beams 4 are disposed at approximately equal intervals in the first direction, but do not necessarily have to be at equal intervals. The other two of the four fourth beams 4 are fixed to the second beam 2 on the other side in the second direction and extend to one side in the second direction toward the composite beam 10. In this embodiment, these other two fourth beams 4 are fixed at approximately equal intervals in the first direction, but do not necessarily have to be at equal intervals.

[0041] As shown in FIG. 2, when focusing on the web 2W of the second beam 2, a gusset plate 2G is welded to the position where the fourth beam 4 is fixed. Each of the fourth beams 4 may be fixed to the second beam 2, for example, by fixing the web 4W of the fourth beam 4 to these gusset plates 2G using fasteners 102 such as bolts and nuts. One of a pair of fourth beams 4, 4 facing each other in the second direction is fixed to an end AT on one side of the piece member 12 in the second direction, and the other of the pair of fourth beams 4, 4 is fixed to an end BT on the other side of the piece member 12 in the second direction. The fourth beam 4 and the piece member 12 may be fixed to each other, for example, by bridging a metal plate member 106 so as to straddle the end of the fourth beam 4 and the end of the piece member 12 (for example, the end AT), and fastening the plate member 106 to the fourth beam 4 and the piece member 12 using fasteners 105 such as bolts and nuts.

[0042] Thus, in this embodiment, the architectural structure 1 includes the fourth beam 4 extending in the second direction from the second beam 2, and the composite beam 10 includes one or more piece members 12, 13 extending in the second direction from at least one side in the second direction of the first beam 11, and the fourth beam 4 and the piece members 12, 13 are fixed to each other. That is, in the architectural structure 1 of this embodiment, as shown in Fig. 1, multiple beams form multiple lattice-like structures, which further enhances the strength of the architectural structure 1.

[0043] It should be noted that providing the architectural structure 1 with the fourth beam 4 is not essential.

[0044] As shown in FIG. 1 and FIG. 2, in the second direction, deck plates 119 (second deck plates) are arranged on both sides of the deck plate 19 of the composite beam 10. The deck plate 119 has a span direction in the first direction and a width direction in the second direction, and is formed in a rectangular shape when viewed in the vertical direction. The deck plate 119 is bridged between two third beams 3, 3 in the first direction, and bridged between the second beam 2 and the piece members 12, 13 in the second direction. In this embodiment, the deck plate 119 is formed so that the peaks and valleys are continuous along the second direction. The valleys of the deck plate 119 are fixed to the upper flange 2FU of the second beam 2, the upper flange 3FU of the third beam 3, the upper flange 4FU of the fourth beam 4, the upper flange 12FU of the piece member 12, and the upper flange 13FU of the piece member 13, for example, by welding. The deck plate 19 may be a flat deck.

[0045] 2, in this embodiment, as described above, the width of the concrete 14 in the second direction is shorter than the length WP of the piece members 12, 13, so a deck plate 119 separate from the deck plate 19 is fixed to the portions of the piece members 12, 13 on which the concrete 14 is not placed. The deck plates 19 and 119 are adjacent to each other on the upper flanges 12FU, 13FU of the piece members 12, 13.

[0046] As shown in FIG. 2, a wire mesh 9 is placed on the deck plate 119 via, for example, a spacer (not shown), and concrete 7 (second concrete) different from the concrete 14 is laid so that the wire mesh 9 is embedded in the concrete 7. The wire mesh 9 may be reinforcing bars. As shown in FIG. 1, when viewed in the vertical direction, the concrete 7 has a shape similar to that of the deck plate 119 and dimensions slightly smaller than the deck plate, and covers the deck plate 119 almost entirely. In other words, in this embodiment, the concrete 7 does not cover the portion of the deck plate 119 that overlaps the second beam 2 and the portion that overlaps the third beam 3. However, the concrete 7 may cover the entire deck plate 119.

[0047] In addition, the deck plate 119, the fourth beam 4, and a portion of each of the piece members 12 and 13 are covered from above with concrete 7, and a portion of the second beam 2 and a portion of the third beam 3 are covered from above with the deck plate 119, so that these cannot actually be seen in a plan view. However, in FIG. 1, for the purpose of explanation, these portions are shown in a see-through manner.

[0048] In this embodiment, the concrete 7 is integrated with the second beam 2, the third beam 3, the fourth beam 4, and the deck plate 119. In this embodiment, as shown in FIG. 2, for example, a plurality of studs 8 are welded to the upper flange 4FU of the fourth beam 4. In this embodiment, the concrete 7 is integrated with the second beam 2, the third beam 3, the fourth beam 4, and the deck plate 119 through these studs 8. Note that the concrete 7 does not necessarily have to be integrated as described above. Unlike the concrete 14 of the composite beam 10, the concrete 7 is cast and cured at the construction site of the building including the architectural structure 1. Therefore, as shown in FIG. 1 and FIG. 2, there is a boundary CB (joint) between the concrete 7 already cured in the factory and the concrete 14 cured at the construction site.

[0049] Next, a method for constructing the architectural structure 1 will be described.

[0050] As shown in FIG. 4, the method for constructing an architectural structure 1 according to this embodiment includes a preparation step P1, a composite beam fixing step P2, a deck plate fixing step P3, and a concrete pouring step P4.

[0051] First, a preparation step P1 is performed. This step is a step of manufacturing the above-mentioned composite beam 10 in a factory or the like and preparing it for the construction of the architectural structure 1. Specifically, a composite beam 10 as shown in FIG. 5 is prepared. As described above, the concrete 14 (first concrete) of the composite beam 10 is poured and cured (precast) in a factory, so this step can reduce the cross-sectional area of ​​the first beam 11. For example, the cross-sectional area of ​​the first beam 11 can be made smaller than the cross-sectional area of ​​the second beam 2 (see FIG. 2). In addition, according to this step, the beam can be supported using factory equipment to support the load of the concrete, so there is no need to provide a camber in the beam in anticipation of the deformation of the beam, and the effort and cost related to processing, transportation, construction, etc. can be reduced.

[0052] Also, at the construction site of the building including the architectural structure 1, a frame body 1A as shown in Fig. 6 is constructed in advance. A composite beam 10 is fixed to this frame body 1A. In this embodiment, the frame body 1A is a structure consisting of beams and columns, and includes four columns 5, two second beams 2, and two third beams 3. Note that, in other embodiments, the frame body 1A may be composed of only beams (for example, only beams 2 and 3). That is, the column 5 may be omitted, and the frame body 1A may be constructed by extending the beams 2 and 3 to the portion where the column 5 was located.

[0053] Next, a composite beam fixing process P2 is performed. This process is a process of fixing the composite beam 10 to the third beam 3 extending in the second direction of the frame body 1A. Specifically, as shown in FIG. 7, the piece members 13, 13 fixed to both ends of the composite beam 10 in the first direction are abutted against the two third beams 3, 3. Then, the piece members 13 are fixed to the third beam 3, for example, via the above-mentioned gusset plate 3G (see FIG. 3). In this way, the composite beam 10 is fixed to the frame body 1A, and the first beam 11 and concrete 14 are laid in the frame body 1A. That is, in this process, concrete (first concrete 14) is laid in a part of the frame body 1A (the central part in this embodiment) without pouring and curing at the construction site. In this way, an architectural structure 1B in which the composite beam 10 is provided on the frame body 1A is constructed.

[0054] This architectural structure 1B comprises a second beam 2 extending in a first direction, a third beam 3 extending in a second direction, and a composite beam 10 fixed to the third beam 3, and in the architectural structure 1B, the cross-sectional area of ​​the first beam 11 in a third direction (vertical direction) perpendicular to both the first and second directions is smaller than the cross-sectional area of ​​the second beam 2 in the third direction (see Figure 2).

[0055] Next, a deck plate fixing process P3 is performed. This process is a process of arranging a deck plate other than the deck plate 19 of the composite beam 10 next to the composite beam 10 in the second direction and fixing it to the beam.

[0056] In this embodiment, first, as shown in Fig. 8, the fourth beam 4 is fixed to each of the second beams 2, 2 via, for example, a gusset plate 2G (see Fig. 2), and is also fixed to each of the piece members 12, 12 via, for example, a plate member 106 (see Fig. 2). In this way, an architectural structure 1C is constructed in which four fourth beams 4 are fixed to the architectural structure 1B.

[0057] Next, as shown in FIG. 9, deck plates 119 (second deck plates) whose peaks and valleys are continuous along the second direction are arranged on both sides of the composite beam 10 in the second direction. As a result, each of the deck plates 119 is bridged across two third beams 3, 3 in the first direction, and bridged across the second beam 2 and the piece members 12, 13 in the second direction. Then, the valleys of the deck plates 119 are welded to the second beam 2, the third beam 3, the fourth beam 4, and the piece members 12, 13. As a result, in the second direction, one of the two deck plates 119, 119 is fixed adjacent to the composite beam 10 on one side of the composite beam 10, and the other of the two deck plates 119, 119 is fixed adjacent to the composite beam 10 on the other side of the composite beam 10. As a result, an architectural structure 1D in which the deck plate 119 is provided on the architectural structure 1C is constructed.

[0058] In this process, wire mesh (or reinforcing bars) 9 (see Figure 2) may be laid on the deck plate 119 of the architectural structure 1D via spacers, or studs 8 (see Figure 2) may be welded to the fourth beam 4, for example.

[0059] Next, a concrete pouring process P4 is performed. This process is a process of pouring concrete other than the concrete 14 onto the deck plate 119 of the architectural structure 1D. In this embodiment, as shown in Fig. 1, concrete 7 (second concrete) is poured and cured on the deck plate 119 except for the portion overlapping the second beam 2 and the portion overlapping the third beam 3. Then, the construction of the architectural structure 1 is completed by the concrete 7 solidifying.

[0060] According to this method for constructing an architectural structure, the concrete 14 is a part of the composite beam 10 and is precast. That is, at the stage where the composite beam 10 is fixed to the third beam 3 at the construction site, the curing of the concrete 14 has already been completed. On the other hand, the concrete 7 on both sides of the concrete 14 is poured and cured at the construction site. Therefore, a boundary CB is formed between the concrete 7 and the concrete 14 as described above. According to this method for constructing an architectural structure, the concrete 14 is already laid on the framework 1A before the concrete pouring step P4, so that the area where the concrete 7 is poured at the construction site can be reduced as shown in Figs. 7 and 9. Specifically, the area where the concrete 7 is poured can be reduced to the area excluding the concrete 14. Therefore, according to this method for constructing an architectural structure, the volume of the concrete cured at the site can be reduced, and as a result, the occurrence of cracks and the like in the concrete 7 due to drying and shrinkage of the cured concrete 7 is suppressed.

[0061] As described above, the composite beam 10 of this embodiment comprises a first beam 11 extending in a first direction, a deck plate 19 fixed to the first beam 11 and having the first direction as its span direction and a second direction intersecting the first direction as its width direction, and concrete 14 precast on the first beam 11 and the deck plate 19, integrated with the first beam 11 and the deck plate 19, and extending in the first direction.

[0062] In the composite beam 10, the concrete 14 is precast on the first beam 11 and the deck plate 19. That is, the concrete 14 of the composite beam 10 is not cast at the construction site, but cast and cured in advance at a factory before being delivered to the construction site. Since the beam can be supported at the factory using the factory's equipment, the load of the concrete before hardening is supported and deformation of the beam is prevented, even if the beam has a lower rigidity and strength than when the concrete is cast and cured at the construction site. Therefore, according to the composite beam 10, the cross section of the first beam 11 into which the concrete 14 is cast can be made smaller.

[0063] In addition, the architectural structure 1 of this embodiment comprises a second beam 2 extending from the column 5 in a first direction, a third beam 3 extending from the column 5 in a second direction, and a composite beam 10 fixed to the third beam 3, and the cross-sectional area of ​​the first beam 11 in a third direction (vertical direction) perpendicular to both the first direction and the second direction is smaller than the cross-sectional area of ​​the second beam 2 in the third direction.

[0064] According to the architectural structure 1, since the cross-sectional area of ​​the first beam 11 is smaller than the cross-sectional area of ​​the second beam 2, the architectural structure can be made lighter.

[0065] Moreover, the method for constructing an architectural structure according to this embodiment includes a preparation step P1 of preparing a composite beam 10, and a composite beam fixing step P2 of fixing the composite beam 10 to a third beam 3 extending from the column 5 in the second direction.

[0066] According to this method for constructing an architectural structure, it is possible to construct an architectural structure so that the cross-sectional area of ​​the first beam 11 is small. For example, it is possible to construct an architectural structure 1 in which the cross-sectional area of ​​the first beam 11 is smaller than the cross-sectional area of ​​the second beam 2 extending from the column in parallel with the first beam 11.

[0067] Although the present invention has been described above by taking the above embodiment as an example, the present invention is not limited to this.

[0068] For example, in the above embodiment, an example of a composite beam 10 in which the piece members 12, 13 have the same configuration has been described, but this is not limited to this. For example, the piece member 12 may be a steel material having the same cross-sectional shape and dimensions as the fourth beam 4, while the piece member 13 may be, for example, a flat metal plate. Even if the piece member 13 is a metal plate, it is possible to weld a deck plate 19 or a stud 18 to the upper surface of the piece member 13.

[0069] In the above embodiment, an example has been described in which the composite beam 10 includes the piece members 12 and 13, but this configuration is not essential. That is, the piece member 13 may not be provided, the piece member 12 may not be provided, or the piece members 12 and 13 may not be provided. For example, if the architectural structure 1 does not include a fourth beam 4, the piece member 12 may not be provided.

[0070] However, by providing at least one of the piece members 12, 13, the deck plate 19 or studs can be welded to both the first beam 11 and the piece member, thereby enhancing the strength and rigidity of the composite beam 10. Furthermore, by providing the piece member 13, the end of the deck plate 19 can be fixed to the piece member 13, thereby effectively suppressing deflection of the deck plate 19. From the perspective of suppressing deflection of the deck plate 19, it is preferable to further provide piece member 12 in addition to piece member 13, and to also fix parts of the deck plate 19 other than the end to the piece member.

[0071] In the above embodiment, an example has been described in which the height of the piece members 12, 13 is lower than the height of the first beam 11, but this configuration is not essential. For example, if the height of the fourth beam 4 is higher than the height of the first beam 11, the height of the piece member 12 fixed to the fourth beam 4 may be higher than the height of the first beam 11. However, by making the height of the piece members 12, 13 lower than the height of the first beam 11, it is possible to reduce the weight of the composite beam and improve the ease of handling.

[0072] Also, in the above embodiment, an example has been described in which the piece member 13 is located at the end of the deck plate 19, but the deck plate 19 may be slightly extended to a position where it overlaps with the third beam 3. This makes it possible to fix the extended portion of the deck plate 19 and the third beam 3 by, for example, welding. In this case, the piece member 13 is located away from the end of the deck plate 19 by the length of the extended portion of the deck plate 19, and is located in the vicinity of the end of the deck plate 19.

[0073] In addition, in the above-mentioned embodiment, an example was described in which the composite beam 10 includes the first beam 11, but the beam included in the composite beam 10 may be a second beam 2 or a third beam 3 instead of the first beam 11.

[0074] Furthermore, the architectural structure 1 described above is an example of a minimum unit configuration, and an architectural structure may be constructed in which similar architectural structures 1 are continuous in at least one of the first direction and the second direction.

[0075] In addition, a person skilled in the art can appropriately modify the composite beam, architectural structure, and method for constructing an architectural structure of the present invention according to conventionally known knowledge. As long as the configuration of the present invention is still provided even after such modification, it is of course included in the scope of the present invention. [Explanation of symbols]

[0076] 1, 1C, 1D... architectural structure, 2... second beam, 3... third beam, 4... fourth beam, 5... column, 7... second concrete, 10... composite beam, 11... first beam, 12, 13... piece member, 14... first concrete, 19... first deck plate, 119... second deck plate, CB... boundary, P1... preparation process, P2... composite beam fixing process, P3... deck plate fixing process, P4... concrete pouring process

Claims

1. A first beam extending in a first direction; A first deck plate fixed to the first beam, the first direction being a span direction and a second direction intersecting the first direction being a width direction; a first concrete precast to the first beam and the first deck plate to be integral with the first beam and the deck plate and extend in the first direction.

2. one or more piece members extending in the second direction from at least one side portion of the first beam in the second direction; The composite beam of claim 1 , wherein a length of the piece member in the second direction is shorter than a length of the first beam in the first direction.

3. The composite beam of claim 2 , wherein in a third direction perpendicular to both the first direction and the second direction, the height of the piece members is less than the height of the first beam.

4. The composite beam of claim 2 , wherein in the second direction, the width of the first concrete is less than the length of the piece members.

5. The composite beam according to claim 2 , wherein in the first direction, the piece member is at or near an end of the deck plate.

6. A second beam extending in the first direction; A third beam extending in the second direction; a composite beam according to claim 1 secured to said third beam; Equipped with An architectural structure, wherein a cross-sectional area of ​​the first beam in a third direction perpendicular to both the first direction and the second direction is smaller than a cross-sectional area of ​​the second beam in the third direction.

7. Further comprising a second concrete aligned with the first concrete in the second direction; The architectural structure of claim 6 , wherein there is an interface between the first concrete and the second concrete.

8. Further comprising a fourth beam extending from the second beam in the second direction; The composite beam includes one or more piece members extending in the second direction from at least one side of the first beam in the second direction, The architectural structure according to claim 6 or 7, wherein the fourth beam and the piece member are fixed.

9. The architectural structure according to claim 6 or 7, wherein the composite beam is fixed to the center of the third beam in the second direction.

10. A preparation step of preparing a composite beam according to any one of claims 1 to 5; a composite beam fixing step of fixing the composite beam to a beam extending in the second direction; A method for constructing an architectural structure comprising:

11. a deck plate fixing process of arranging a second deck plate other than the first deck plate of the composite beam next to the composite beam in the second direction and fixing the second deck plate to the beam; a concrete pouring step of pouring a second concrete different from the first concrete onto the second deck plate; The method of constructing an architectural structure according to claim 10, further comprising:

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