Column positioning and fixing structure in the hybrid hierarchical section
The column positioning and fixing structure using connecting hardware addresses the challenge of stabilizing wooden columns in high-rise wooden hybrid structures by ensuring accurate placement and load transmission, enhancing structural stability during earthquakes.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- OKUMURA CORP
- Filing Date
- 2024-12-05
- Publication Date
- 2026-06-17
Smart Images
Figure 2026098533000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a positioning and fixing structure of columns in a hybrid hierarchical part. In particular, it relates to a positioning and fixing structure of columns in a hybrid hierarchical part adopted when constructing a hybrid hierarchical part composed of multiple floors formed by a plurality of ceiling slabs and floor slabs of a reinforced concrete structure and a plurality of wooden columns erected and attached between them.
Background Art
[0002] Preferably, as part of the recent efforts towards ESG / SDGs, for example, it is recommended to construct medium-rise to high-rise buildings using a large amount of wood materials. Wood materials require less energy for processing compared to other materials, and their long-term use at multiple stages contributes to preventing global warming and forming a recycling-oriented society. Also, since they can absorb carbon dioxide and fix carbon, they are attracting attention from the perspective of decarbonization.
[0003] In addition, when constructing medium-rise to high-rise buildings using wood materials, it is considered that the strength is likely to be insufficient. Therefore, for the purpose of efficiently ensuring a predetermined strength while using a large amount of wood materials, hybrid buildings constructed using wood materials and non-wood materials formed of steel frames or concrete (for example, see Patent Document 1), and wooden-RC (reinforced concrete) hybrid structure buildings constructed by combining wooden and RC (reinforced concrete) structures (for example, see Patent Document 2 and Non-Patent Document 1) have been developed.
[0004] Furthermore, in Japan, where earthquakes are frequent, it is necessary to consider lateral shaking during earthquakes, especially for mid-to-high-rise and high-rise buildings. For example, mid-to-high-rise base-isolated buildings with a wooden hybrid structure have been developed, which incorporates base isolation functionality into a hybrid building of wood and reinforced concrete (see, for example, Non-Patent Documents 2 and 3). In the base-isolated wooden hybrid structures described in Non-Patent Documents 2 and 3, it is difficult to provide base isolation functionality to the wooden portion, so base isolation is adopted to enable base isolation functionality to be added to wooden hybrid structures. [Prior art documents] [Patent Documents]
[0005] [Patent Document 1] Japanese Patent Publication No. 2019-100057 [Patent Document 2] Japanese Patent Publication No. 2024-104599 [Non-patent literature]
[0006] [Non-Patent Document 1] Dai-ichi Life Insurance Company, Limited, Shimizu Corporation, 'Plan for a rental office building with a wooden hybrid structure in Kyobashi, Chuo-ku, Tokyo: First in the insurance industry to be selected for the Sustainable Building Leading Project (Wooden Leading Type)', [online], February 28, 2023, Shimizu Corporation, [Retrieved September 26, 2024], Internet<URL:https: / / www.shimz.co.jp / company / about / news-release / 2023 / 2022074.html> [Non-Patent Document 2] Yoshihiro Sasaki, et al., 'Technical Report: Mid-rise Apartment Building Using Wood Hybrid Structure - Anesis Chayagasaka -', [online], April 2021, GBRC Journal Vol. 46 No. 2, [Retrieved September 26, 2024], Internet<URL:https: / / www.gbrc.or.jp / assets / documents / gbrc / GBRC184_889.pdf> [Non-Patent Document 3] Fumiki Nakamura, et al., 'Technical Report: Nagato City Hall - Aiming to be a Model Project for Large-Scale Layered Wooden Structures -', [online], July 2020, GBRC Journal Vol. 45 No. 3, [Retrieved September 27, 2024], Internet<URL:https: / / www.gbrc.or.jp / assets / documents / gbrc / GBRC181_873.pdf> [Overview of the project] [Problems that the invention aims to solve]
[0007] On the other hand, in the event of an earthquake, if a high-rise building equipped with a hybrid floor section consisting of multiple floors made of a wooden hybrid structure experiences lateral shaking, especially if the upper floors are made of a wooden hybrid structure which tends to lack strength, the acceleration due to lateral shaking increases with the upper floors, increasing the lateral force. Therefore, it is considered difficult to stably support the lateral force caused by lateral shaking. Accordingly, the applicant has newly developed a high-rise building equipped with a hybrid floor section consisting of multiple floors made of a wooden hybrid structure, for example, in Japanese Patent Application No. 2024-199462 filed on the same date, in which a concrete core section of a reinforced concrete structure, preferably with a rectangular cross-sectional shape, is formed to penetrate the hybrid floor section and continue vertically, and in the hybrid floor section, the ceiling slabs and floor slabs of each floor are formed integrally with the concrete core section by cast-in-place concrete.
[0008] In the high-rise building equipped with a hybrid floor section as described in Japanese Patent Application No. 2024-199462, for example, during an earthquake, even if lateral shaking occurs in the upper floors due to the wooden hybrid structure, increasing the acceleration of the high-rise section and thus increasing lateral forces, these lateral forces are smoothly transmitted to the highly rigid reinforced concrete core through the ceiling slab and floor slab. This allows the concrete core to support such lateral forces during an earthquake efficiently and effectively in a stable state. Furthermore, since the ceiling slab and floor slab of the reinforced concrete structure, which are cast-in-place concrete, are integrally formed with the highly rigid reinforced concrete core, the vertical loads applied to the ceiling slab and floor slab can also be supported by the concrete core. For this reason, on each floor of the hybrid floor section, wooden columns, which are lighter and simpler than reinforced concrete columns, can be used as multiple columns that transmit and support the vertical load from the ceiling slab to the floor slab via axial force.
[0009] When installing multiple wooden columns between the ceiling and floor slabs of a reinforced concrete structure constructed using cast-in-place concrete, the upper and lower ends of each wooden column must be joined integrally to the ceiling and floor slabs via connecting hardware. However, particularly with respect to the upper ends of the wooden columns, there is a risk that the columns may shift position during the process of assembling reinforcing bars and formwork and pouring concrete when forming the ceiling slab of the floor being constructed (which also serves as the floor slab of the upper floor) using cast-in-place concrete after the wooden columns have been erected and their upper ends positioned. This can prevent the columns from being accurately fixed in their predetermined positions and thus prevent them from exerting the desired axial force. Therefore, it is necessary to keep the erected wooden columns, especially their upper ends, in a stable and accurate position until the poured concrete hardens.
[0010] The present invention aims to provide a column positioning and fixing structure for hybrid floor sections, which allows for the precise and stable positioning of multiple wooden columns, particularly their upper ends, via connecting metal members, when erecting them between the upper and lower ceiling slabs and floor slabs of a reinforced concrete structure, until the poured concrete hardens. [Means for solving the problem]
[0011] The present invention relates to a column positioning and fixing structure in a hybrid floor section, which is formed by multiple floors of reinforced concrete ceiling slabs and floor slabs and multiple wooden columns erected and attached between the upper and lower ceiling slabs and floor slabs, and prior to pouring the concrete for the ceiling slabs and floor slabs, the upper and lower ends of the wooden columns, which are positioned above and below the ceiling slabs and floor slabs, are positioned and fixed using connecting hardware. The connecting hardware is configured to include temporary main body hardware, which is positioned at the fixing points in the ceiling slab and floor slab of the upper and lower ends of each pair of wooden columns that are erected adjacent to each other at a predetermined interval in the horizontal direction on each floor of the hybrid layer section, and temporary horizontal connecting hardware that connects each adjacent pair of temporary main body hardware, and the temporary main body hardware is provided interposed between the base plate of each pair of column connecting hardware and the base plate of these The temporary horizontal connecting hardware is formed by including a vertical connecting hardware section that connects a pair of the aforementioned column connecting hardware sections together vertically, and an overhanging connecting hardware section that is provided integrally with the vertical connecting hardware section so as to extend vertically in the horizontal direction from the vertical connecting hardware section, with a bolt fastener fixed to the overhanging end portion. The temporary horizontal connecting hardware is a rod-shaped metal member with bolt fasteners fixed to both ends. Prior to pouring concrete for the ceiling slab and floor slab above each floor, the temporary main body hardware is used to connect the column connecting plate of the lower column connecting hardware section. With the upper end of the wooden column joined to the slab, the base plates of the upper and lower column joining hardware are positioned and attached to the fixing points of the wooden column in the ceiling slab and floor slab, on the lower or upper surfaces of the ceiling slab and floor slab, and the temporary horizontal connecting hardware is positioned between the protruding connecting hardware portions of the temporary main body hardware on both sides via bolt members inserted across the bolt fasteners at both ends and the bolt fasteners at the protruding tip portions of the protruding connecting hardware portions of the temporary main body hardware, andThe above objective is achieved by providing a column positioning and fixing structure for a hybrid floor section, which allows the upper and lower ends of the wooden columns, which are joined to the column joining plates positioned above and below the ceiling slab and floor slab, to be fixed in predetermined positions by adjusting the fastening and fixing positions of the bolt members, which are inserted across the bolt fasteners at the protruding tip of the protruding connecting hardware and the bolt fasteners at both ends of the temporary horizontal connecting hardware, using nut members.
[0012] Furthermore, in the column positioning and fixing structure for the hybrid hierarchical section of the present invention, the ceiling slab and floor slab are formed integrally with the concrete beam, and the multiple wooden columns are erected and installed between the upper and lower ceiling slabs and floor slabs with the concrete beam in between. Preferably, the temporary main body hardware is attached by positioning at least one of the base plates of the upper and lower column joint hardware on the lower or upper portion of the fixing location of the wooden column on the concrete beam, with the upper end of the wooden column joined to the column joint plate of the lower column joint hardware.
[0013] Furthermore, in the positioning and fixing structure of the column in the hybrid hierarchical section of the present invention, it is preferable that the vertical connecting hardware portion and the cantilever connecting hardware portion of the temporary main body hardware, and the temporary horizontal connecting hardware are made of H-shaped steel.
[0014] Furthermore, in the positioning and fixing structure of the column in the hybrid hierarchical section of the present invention, it is preferable that the bolt fastener at the overhanging tip of the overhanging connecting portion of the temporary main body fitting and the bolt fasteners at both ends of the temporary horizontal connecting fitting are made of cylindrical tubes. [Effects of the Invention]
[0015] According to the column positioning and fixing structure in the hybrid hierarchical part of the present invention, when a plurality of wooden columns are erected between the upper and lower ceiling slabs and floor slabs of a reinforced concrete structure, especially the upper end portions of each wooden column can be accurately positioned in a stable state through joining metal members until the placed concrete hardens.
Brief Description of the Drawings
[0016] [Figure 1] It is a broken perspective view showing a high-rise building with a hybrid hierarchical part, in a state excluding the outer wall, which explains the column positioning and fixing structure according to a preferred embodiment of the present invention. [Figure 2] It is a schematic cross-sectional view along A-A of FIG. 5, which explains a high-rise building with a hybrid hierarchical part, in which the column positioning and fixing structure according to a preferred embodiment of the present invention is adopted. [Figure 3] It is a schematic cross-sectional view along B-B of FIG. 5, which explains a high-rise building with a hybrid hierarchical part, in which the column positioning and fixing structure according to a preferred embodiment of the present invention is adopted. [Figure 4] It is a schematic cross-sectional view along C-C of FIG. 2, which explains a high-rise building with a hybrid hierarchical part, in which the column positioning and fixing structure according to a preferred embodiment of the present invention is adopted. [Figure 5] It is a schematic cross-sectional view along D-D of FIG. 2, which explains a high-rise building with a hybrid hierarchical part, in which the column positioning and fixing structure according to a preferred embodiment of the present invention is adopted. [Figure 6] It is a schematic cross-sectional view along E-E of FIG. 2, which explains a high-rise building with a hybrid hierarchical part, in which the column positioning and fixing structure according to a preferred embodiment of the present invention is adopted. [Figure 7] It is a schematic cross-sectional view along F-F of FIG. 6, which explains the column positioning and fixing structure according to a preferred embodiment of the present invention. [Figure 8] It is an enlarged view of the main part of FIG. 7. [Figure 9](a) is a front view explaining the joining metal fittings that constitute the preferred column positioning and fixing structure of the present invention, (b) is a cross-sectional view taken along G-G of (a), (c) is a cross-sectional view taken along H-H of (a), (d) is a cross-sectional view taken along I-I of (a), and (e) is a top view taken along J-J of (a).
Embodiments for Carrying out the Invention
[0017] The column positioning and fixing structure 60 (see FIGS. 7, 8, and 9(a)) according to a preferred embodiment of the present invention is, for example, as shown in FIG. 1, adopted when constructing a high-rise building 10 having a hybrid hierarchical portion. The high-rise building 10 having a hybrid hierarchical portion is preferably a high-rise building of 6 stories or more, for example, an 8-story building, and preferably has a seismic isolation function so that the building can continue to be held in a stable state during an earthquake. The high-rise building 10 includes a lower layer 20 composed of, for example, two floors with a reinforced concrete structure, and an upper layer 30 composed of a plurality of floors with a wooden hybrid structure, for example, six floors, and is a building made of reinforced concrete and wood. The column positioning and fixing structure 60 in the hybrid hierarchical portion of the present embodiment is, for example, in the process of constructing the upper layer 30, which is the hybrid hierarchical portion of the high-rise building 10, as shown in FIGS. 7 and 8, when installing a plurality of wooden columns 53 by standing them between the upper and lower ceiling slabs 51 and floor slabs 52 of a reinforced concrete structure with in-situ concrete, especially the upper end portions 53a of each wooden column 53 are configured to be accurately positioned in a stable state by using a joining metal fitting 61 (see FIGS. 9(a) to (e)) including a temporary main metal fitting 62 and a temporary horizontal connecting metal fitting 66.
[0018] Furthermore, as shown in Figures 7 and 8, the column positioning and fixing structure 60 of this embodiment is a fixing structure for wooden columns 53 in the upper floor 30, which is a hybrid floor portion consisting of multiple floors of a hybrid structure formed by multiple reinforced concrete ceiling slabs 51 and floor slabs 52 and multiple wooden columns 53 erected and installed between these ceiling slabs 51 and floor slabs 52. In the construction of the upper floor 30, which is a hybrid floor portion consisting of multiple floors of a hybrid structure, the upper end 53a and lower end 53b of the wooden columns 53, which are positioned above and below the ceiling slabs 51 and floor slabs 52, using connecting hardware 61, prior to pouring the concrete for the ceiling slabs 51 and floor slabs 52. As shown in Figures 9(a) to (e), the connecting hardware 61 is composed of temporary main hardware 62 that are placed at the fixing points in the ceiling slab 51 and floor slab 52 of the upper end 53a and lower end 53b of each pair of wooden columns 53 that are erected adjacent to each other at a predetermined interval in the horizontal direction on each floor of the upper floor 30, which is the hybrid layer section, and temporary horizontal connecting hardware 66 that connects each adjacent pair of temporary main hardware 62. The temporary main body hardware 62 is formed by including a pair of upper and lower column joint hardware parts 63, which are vertically erected from a base plate 63a to a column joint plate 63b; a vertical connecting hardware part 64 interposed between the base plate 63a of these pair of column joint hardware parts 63 to connect these pair of column joint hardware parts 63 as a single unit vertically; and an overhanging connecting hardware part 65 which is provided integrally with the vertical connecting hardware part 64 so as to extend vertically in the horizontal direction from the vertical connecting hardware part 64, with a bolt fastener 65a fixed to the overhanging end. The temporary horizontal connecting hardware 66 is a rod-shaped hardware member with bolt fasteners 66a fixed to both ends.
[0019] Prior to pouring concrete for the upper ceiling slab 51 and floor slab 52 on each floor, as shown in Figure 8, the temporary main body hardware 62 is installed so that the upper end portion 53a of the wooden column 53 is joined to the column connection plate 63b of the column connection hardware 63, and the base plates 63a of the upper and lower column connection hardware 63 are positioned and attached to the lower or upper portion of the ceiling slab 51 and floor slab 52 at the fixing points of the wooden column 53 on the ceiling slab 51 and floor slab 52. In addition, the temporary horizontal connecting hardware 66 is installed so that it is erected between the cantilevered connecting hardware 65 of the temporary main body hardware 62 on both sides via a bolt member 67a (see Figure 9(a)) that is inserted across the bolt fasteners 66a at both ends and the bolt fastener 65a at the cantilevered tip of the cantilevered connecting hardware 65 of the temporary main body hardware 62. Furthermore, by adjusting the fastening and fixing positions of the bolt fasteners 65a and 66a on the bolt member 67a, which is inserted across the bolt fasteners 65a at the protruding tip of the protruding connecting hardware 65 and the bolt fasteners 66a at both ends of the temporary horizontal connecting hardware 66, using the nut member 67b (see Figure 9(a)), the upper end 53a and lower end 53b of the wooden column 53, which are positioned above and below the ceiling slab 51 and floor slab 52, can be fixed in place at predetermined positions.
[0020] Furthermore, in this embodiment, the ceiling slab 51 and floor slab 52 are preferably formed integrally with the concrete beam 54b, which is, for example, an inverted beam 58 (see Figures 1 and 6), so that the multiple wooden columns 53 are erected and attached between the ceiling slab 51 and floor slab 52 with the concrete beam 54b in between. The temporary main body hardware 62 is preferably attached with the upper end portion 53a of the wooden column 53 joined to the column joint plate 63b of the lower column joint hardware portion 63, and the base plate 63a of the upper column joint hardware portion 63 is positioned and attached to the upper portion as at least one of the upper and lower column joint hardware portions 63, and the base plate 63a of the upper column joint hardware portion 63 is positioned and attached to the upper portion as the lower or upper portion of the concrete beam 54b, with the upper end portion 53a of the wooden column 53 joined to the column joint plate 63b of the lower column joint hardware portion 63.
[0021] In this embodiment, the ceiling slab 51 of the lower floor also serves as the floor slab 52 of the upper floor. Therefore, these reinforced concrete slabs 51 and 52 are described as a single unit, the ceiling slab 51 and the floor slab 52. In addition, in Figures 7 and 8, the temporary main body hardware 62 and the temporary lateral connecting hardware 66 that constitute the connecting assembly hardware 61 are disclosed in a transparent state, showing the ceiling slab 51 and the floor slab 52, the concrete beam 54b which is an inverted beam 58, and the wooden column 53.
[0022] In this embodiment, the high-rise building 10, which includes an upper floor 30 that is a hybrid floor section as shown in Figures 1 to 6, is constructed, for example, as an employee dormitory. The first floor 21, which is the lowest floor of the lower floor 20, which is a two-story reinforced concrete structure, is formed as a public space mainly equipped with a dining hall, bathhouse, garbage disposal area, etc. The second floor 22 of the lower floor 20, and the third to eighth floors of the upper floor 30, which is a hybrid floor section of a wooden hybrid structure above the lower floor 20, are formed as living spaces with multiple private rooms for each employee (see Figures 5 and 6). Preferably, in the lower floor 20, which is a reinforced concrete structure, an intermediate floor seismic isolation layer 40 that exhibits seismic isolation function is formed in the area between the first floor 21, which is formed as a public space, and the second floor 22, which is formed as a living space, as a dedicated seismic isolation space that residents normally do not enter.
[0023] Furthermore, in this embodiment, the intermediate floor seismic isolation layer 40 has a similar configuration to, for example, the intermediate floor seismic isolation layer provided in a high-rise building having a hybrid floor portion as described in Japanese Patent Application No. 2024-199462, and is preferably interposed between the first floor 21, which is the lowest floor, and the second floor 22, which is the top floor, of the lower floor 20, which is a reinforced concrete structure (see Figures 2 and 3). The intermediate floor seismic isolation layer 40 is composed of a ceiling slab 41 of the first floor 21, which is also the floor slab of the intermediate floor seismic isolation layer 40, a floor slab 42 of the second floor 22, which is also the ceiling slab of the intermediate floor seismic isolation layer 40, and a plurality of seismic isolation operating parts 43 interposed between these ceiling slabs 41 and floor slabs 42, supporting the ceiling slab 41 so that it can move laterally relative to the floor slab 42. The seismic isolation actuation unit 43 is composed of a plurality of upper concrete base portions 42a that protrude downward from the floor slab 42 of the second floor 22, a plurality of lower concrete base portions 41a that protrude upward from the ceiling slab 41 of the first floor 21, and a known seismic isolation device 47, which is mounted between these upper and lower base portions 41a and 42a, and consists of, for example, a high-damping rubber laminated bearing, an elastic sliding bearing, a linear rolling bearing, etc. As shown in Figure 4, the seismic isolation actuation unit 43 is interposed between the ceiling slab 41 of the lower floor 21 and the floor slab 42 of the upper floor 22, and is provided distributed at multiple locations. This makes it possible to support the ceiling slab 41 from the floor slab 42 in a stable state and to allow relative movement in the lateral direction by the multiple seismic isolation actuation units 43.
[0024] As described above, in this embodiment, the second floor 22, which is the top floor of the lower floor 20 of the reinforced concrete structure, is formed as a living space with multiple private rooms. As shown in Figure 5, the second floor 22 has a roughly L-shaped plan, consisting of a western main floor section 22a which has a wider plan in the north-south direction, obtained by cutting out approximately 4.5 of the northeastern horizontal rectangle of a horizontally elongated rectangular plan that is long in the east-west direction, and an overhanging floor section 22b which has a narrower width in the north-south direction and is provided extending eastward from approximately the southern half of the main floor section 22a.
[0025] On the second floor 22 of the reinforced concrete structure, a corridor 22c is provided that traverses the central north-south part of the main floor 22a and extends further east-west along the northern edge of the cantilevered floor 22b. To the south of the corridor 22c, for example, 10 private rooms 25 are provided, separated by a reinforced concrete partition wall 22d, and are connected in an east-west direction from the main floor 22a to the cantilevered floor 22b, with access from the corridor 22c. To the north of the corridor 22c on the main floor 22a, for example, 2 private rooms 25 are provided in the western part, separated by a partition wall 22e made of gypsum board or the like, with access from the corridor 22c. Adjacent to the east of these, a concrete core section 50 with a rectangular cross-sectional shape of reinforced concrete structure is provided, where the elevator shaft 35 is located (see Figure 6). Adjacent to the east of the concrete core section 50, a reinforced concrete stairwell 55 is provided. As will be described later, the concrete core section 50 and the elevator shaft 35 are constructed to be erected continuously upward from the second floor 22 to the eighth floor 31f, which is the top floor of the upper floor 30 (see Figure 3).
[0026] Furthermore, in this embodiment, the floors from the 3rd floor 31a to the 8th floor 31f in the upper floor 30, which is connected to the 2nd floor 22, the top floor of the lower floor 20 of the reinforced concrete structure, are formed as living spaces with multiple private rooms 25, as described above, and have substantially the same floor plan. The floors from the 3rd floor 31a to the 8th floor 31f are a hybrid floor section consisting of multiple floors of a wooden hybrid structure. For example, as shown in Figure 6, the 4th floor 31b has a plan shape that adds one private room 25 on the base end side (west side) in the cantilever direction of the cantilevered floor section 22b to the main floor section 22a of the 2nd floor 22 of the reinforced concrete structure.
[0027] Furthermore, on the fourth floor 31b of the wooden hybrid structure, for example, a corridor 32a is provided that crosses the central part in the north-south direction. On the south side of the corridor 32a, preferably separated by a wooden partition wall 32b and a partition wall made of gypsum board or the like, for example, six private rooms 33 are provided, connected in the east-west direction and accessible from the corridor 32a. On the north side of the corridor 32a, preferably separated by wooden bracing and a partition wall made of gypsum board or the like, for example, two private rooms 33 are provided in the western part, accessible from the corridor 32a. Adjacent to the east of these, similar to the second floor 22, a concrete core section 50 with a rectangular cross-section of reinforced concrete structure is provided, where an elevator shaft 35 is located. Further east of the concrete core section 50, a stairwell 55 of reinforced concrete structure is provided.
[0028] Furthermore, in this embodiment, the upper floors 30, which are formed continuously above the lower floor 20 of the reinforced concrete structure, for example from the 3rd floor 31a to the 8th floor 31f, are a hybrid floor section consisting of multiple floors of a wooden hybrid structure, formed by a plurality of wooden columns 53 and reinforced concrete ceiling slabs 51 and floor slabs 52, as described above. The upper floors 30 of the wooden hybrid structure are preferably erected from the floor slab 42 of the 2nd floor 22, which is the top floor of the lower floor 20 of the reinforced concrete structure (see Figure 3), and include a concrete core section 50 of a reinforced concrete structure with a rectangular cross-sectional shape that is formed continuously in the vertical direction so as to penetrate the upper floors 30 of the wooden hybrid structure (see Figures 5 and 6). In the upper floor 30, which is a wooden hybrid structure, the ceiling slab 51 and floor slab 52 of each floor 31a to 31f are formed integrally with the concrete core 50, projecting outward from the concrete core 50. Each of the multiple wooden columns 53 is separated at the portion of the floor slab 52 of the upper floors 31b to 31f, which is also the ceiling slab 51 of the lower floors 31a to 31f, and is erected and installed between the ceiling slab 51 and floor slab 52 of each floor 31a to 31f (see Figure 3).
[0029] In other words, in this embodiment, the concrete core 50 of the reinforced concrete structure is formed sequentially by pouring concrete for each floor 31a to 31f, preferably starting from the floor slab 42 of the second floor 22 of the lower floor 20 of the reinforced concrete structure. For example, the ceiling slabs 51 and floor slabs 52 of each floor 31a to 31f can be formed by assembling the formwork for the slabs and simultaneously pouring concrete while the reinforcing bars to be placed are joined to the reinforcing bars of the concrete core 50. This makes it possible to form the ceiling slabs 51 and floor slabs 52 of each floor 31a to 31f as an integral part of the concrete core 50, so as to protrude outward from the concrete core 50.
[0030] In this embodiment, as shown in Figures 7 and 8, the multiple wooden columns 53 are erected, for example, when concrete is poured together with the concrete core portion 50 to form the ceiling slab 51 and floor slab 52 for each floor 31a to 31f. The erected wooden columns 53 can be positioned stably and accurately, especially at their upper ends 53a, by the column positioning and fixing structure 60 in the hybrid floor section described above, during the work of assembling the reinforcing bars and formwork for the slabs and pouring the concrete.
[0031] In other words, in this embodiment, for example, when forming the ceiling slab 51 and floor slab 52 of the lower floor, the column positioning and fixing structure 60 has already been implemented. Preferably, on the upper surface portion of the concrete beam 54b which is formed integrally with the ceiling slab 51 and floor slab 52, the lower end portion 53b is joined to the column joining plate 63b above the temporary main body fitting 62 of the joining hardware 61 which is erected from multiple fixing points of the wooden column 53 by a known method such as drift pins. Multiple wooden columns 53 are then erected, and the upper end portions 53a of each pair of erected wooden columns 53, which are erected adjacent to each other at a predetermined interval in the lateral direction in which the concrete beam 54b extends, can be accurately and easily positioned using the joining hardware 61 which consists of the temporary main body fitting 62 and the temporary lateral connecting fitting 66.
[0032] To position the upper ends 53a of each pair of adjacent wooden columns 53 that have been erected, the temporary main body fittings 62 (see Figure 9(a) to (e)) are attached to the upper ends 53a of each erected wooden column 53 by a known joining method, for example, by inserting the column joining plate 63b of the lower column joining fitting portion 63 of the temporary main body fitting 62 that constitutes the joining fitting 61 (see Figure 9(a) to (e)) into the slit formed in the upper end 53a of each wooden column 53, and then driving in drift pins (see Figure 8). Subsequently, a temporary horizontal connecting fitting 66 is positioned between the protruding ends of the protruding connecting fittings 65 of the temporary main body fittings 62 on both sides, which are attached to the upper ends 53a of adjacent wooden columns 53. The central axes of the pair of upper and lower bolt fasteners 66a, preferably made of cylindrical tubes, at both ends of the positioned temporary horizontal connecting fitting 66 are aligned with the central axes of the pair of upper and lower bolt fasteners 65a, preferably made of cylindrical tubes, at the protruding ends of the protruding connecting fittings 65. As shown in Figure 9(a), bolt members 67a are inserted through these bolt fasteners 65a and 66a, straddling them. This makes it possible to connect the temporary main body fittings 62 on both sides, which are attached to the upper ends 53a of each pair of adjacent wooden columns 53.
[0033] Furthermore, in this embodiment, each bolt member 67a, which is inserted so as to straddle the tubular bolt fasteners 65a and 66a, has a pair of nut members 67b screwed onto both sides of the bolt fasteners 65a and 66a (see Figure 9(a)). By adjusting the fastening and fixing positions of these bolt fasteners 65a and 66a on each inserted bolt member 67a using the nut members 67b, the upper end 53a and lower end 53b of the wooden column 53, which are positioned above and below the ceiling slab 51 and floor slab 52 and the concrete beam 54b, can be easily and smoothly fixed in their predetermined positions, as described above. In addition, this makes it possible to adjust the wooden column 53 to stand upright in the vertical direction with high precision, and the axial force exerted by the wooden column 53 can be exerted efficiently and effectively.
[0034] Furthermore, in this embodiment, by processing and forming the wooden column 53 and the temporary main body hardware 62 to a predetermined height designed in advance, when the upper end portion 53a of the wooden column 53 is accurately positioned and fixed using the joining hardware 61, the base plates 63a of the pair of upper and lower column joining hardware 63 can be placed at a height that corresponds to the lower surface portion of the ceiling slab 51 and floor slab 52 of the floor being constructed, or the upper surface portion of the concrete beam 54b which is an inverted beam 58, at the fixing points of the wooden column 53 in the ceiling slab 51 and floor slab 52 and the concrete beam 54b, and can be easily attached to these lower or upper surfaces.
[0035] With the upper end portion 53a precisely positioned and fixed, multiple wooden columns 53 are erected in predetermined positions. Then, the formwork for the ceiling slab 51, floor slab 52, and concrete beam 54b of the floor to be constructed is assembled appropriately with temporary scaffolding using a known method, and after the reinforcing bars are assembled, cast-in-place concrete is preferably poured together with the concrete of the concrete core portion 50 of the floor. Once the poured concrete hardens, it becomes possible to form a hybrid structure of the floor, preferably consisting of a reinforced concrete ceiling slab 51 and floor slab 52, a concrete beam 54b which is an inverted beam 58, and multiple wooden columns 53 erected and attached between them.
[0036] In the floor to be constructed, when the column positioning and fixing structure 60 of this embodiment is implemented as described above, the upper ends of multiple wooden columns 53 are accurately positioned and fixed, and the ceiling slab 51 and floor slab 52 are formed together with the concrete beam 54b, the column joining plates 63b above the temporary main body fittings 62 of the joining hardware 61 are erected from the base plate 63a on the upper surface portion of the concrete beam 54b, which is an inverted beam 58, from multiple fixing points of the wooden columns 53. By joining the lower ends 53b to these erected column joining plates 63b, and erecting multiple wooden columns 53 on the upper floor in the same manner as described above, while accurately positioning the upper ends of the wooden columns 53 using the joining hardware 61, the same work is repeated, making it possible to sequentially form the ceiling slab 51 and floor slab 52 of the upper floor together with the concrete beam 54b. This makes it possible to construct an upper floor 30, which is a hybrid layer consisting of multiple floors of a hybrid structure, formed by multiple ceiling slabs 51 and floor slabs 52 of a reinforced concrete structure, and multiple wooden columns 53 erected and installed between the upper and lower ceiling slabs 51 and floor slabs 52.
[0037] Furthermore, according to the column positioning and fixing structure 60 of this embodiment, as described above, the temporary horizontal connecting hardware 66 is attached between the protruding connecting hardware portions 65 of the temporary main hardware 62 on both sides via a bolt member 67a that is inserted across the bolt fasteners 66a at both ends and the bolt fasteners 65a at the protruding tip portion of the protruding connecting hardware portion 65 of the temporary main hardware 62. The fastening and fixing position of the bolt fasteners 65a and 66a on the inserted bolt member 67a is adjusted using a nut member 67b, thereby allowing the ceiling slab 51 and floor slab 52 to be positioned and fixed. Furthermore, since the upper end 53a and lower end 53b of the wooden column 53, which are positioned above and below the concrete beam 54b, can be fixed in place at predetermined positions, when installing multiple wooden columns 53 by erecting them between the upper and lower ceiling slabs 51 and floor slabs 52 of a reinforced concrete structure, and preferably between the concrete beam 54b, it becomes possible to stably and accurately position the upper end 53a of each wooden column 53 via the connecting hardware 61, which is a connecting metal member, until the poured concrete hardens.
[0038] Furthermore, in this embodiment, in the upper floor 30, which is a hybrid floor section, a wooden seismic wall 56 can be erected and installed, preferably with a concrete beam 54b, which is preferably an inverted beam 58, interposed between the upper and lower ceiling slabs 51 and the floor slab 52 (see Figures 1, 6 to 8). By erecting and installing the wooden seismic wall 56 between the ceiling slab 51 and the floor slab 52, it becomes possible to further improve the shear strength of the upper floor 30.
[0039] It should be noted that the present invention is not limited to the above embodiments and can be modified in various ways. For example, if the ceiling slab and floor slab are formed integrally with the concrete beam, it is not necessarily required that multiple wooden columns be erected and attached between the upper and lower ceiling slabs and floor slabs with the concrete beam in between. Even if the concrete beam is not formed integrally with the ceiling slab and floor slab, the column positioning and fixing structure of the present invention can be achieved by arranging the cantilevered connecting parts and temporary horizontal connecting parts of the temporary main body hardware within the ceiling slab and floor slab. The concrete beam may not be an inverted beam, but a beam that supports the ceiling slab and floor slab from below, or a so-called cross beam. The vertical connecting parts, cantilevered connecting parts and temporary horizontal connecting parts of the temporary main body hardware can also be formed using steel materials other than H-shaped steel. The bolt fasteners do not necessarily have to be cylindrical tubes. [Explanation of Symbols]
[0040] 10. Seismic isolation high-rise buildings 20 lower level 21 Lower floor (1st floor) 22 Upper floor (2nd floor) 22a Main floor area 22b Overhanging floor section 22c Corridor 22d, 22e Partition wall 25 private rooms 30 Upper layer 31a 3rd floor 31b 4th floor 31c 5th floor 31d 6th floor 31e, 7th floor 31F (8th floor) 32a Corridor 32b Partition wall 33 private rooms 35 Elevator shaft 40 Intermediate floor seismic isolation layer 41. Ceiling slab of the lower floor 41a Lower concrete base 42 Floor slab of the upper floor 42a Upper concrete base 43 Seismic isolation mechanism 47 Seismic isolation device 50 Concrete core section 51 Ceiling slab 52 Floor slab 53 Wooden pillar 53a Upper end 53b Lower end 54b Concrete beam 55 Staircase 56. Wooden seismic walls 58 Reverse beam 60 Fixed structure 61 Joining hardware 62 Temporary main structure hardware 63 Column joint hardware 63a Base plate 63b Column connection plate 64 Vertical connecting hardware section 65. Overhanging connecting hardware section 65a, 66a Bolt fastening device 66 Temporary horizontal connecting hardware 67a Bolt member 67b Nut component
Claims
1. In constructing a hybrid multi-story section consisting of multiple floors of a hybrid structure formed by multiple reinforced concrete ceiling slabs and floor slabs and multiple wooden columns erected and attached between the upper and lower ceiling slabs and floor slabs, a column positioning and fixing structure in the hybrid multi-story section is provided for positioning and fixing the upper and lower ends of the wooden columns, which are positioned above and below the ceiling slabs and floor slabs, using connecting hardware, prior to pouring the concrete for the ceiling slabs and floor slabs. The aforementioned connecting hardware is configured to include temporary main body hardware, which is positioned at the fixing points in the ceiling slab and floor slab of the upper and lower ends of each pair of wooden columns that are erected adjacent to each other at a predetermined interval in the horizontal direction on each floor of the hybrid layer, and temporary horizontal connecting hardware that connects each adjacent pair of temporary main body hardware. The temporary main body hardware is formed by including a pair of upper and lower column joint hardware sections, each having a column joint plate erected vertically from a base plate; a vertical connecting hardware section interposed between the base plates of these pair of column joint hardware sections to connect them together vertically; and an overhanging connecting hardware section provided integrally with the vertical connecting hardware section, extending vertically in the horizontal direction from the vertical connecting hardware section, with a bolt fastener fixed to the overhanging tip. The aforementioned temporary horizontal connecting hardware is a rod-shaped metal member with bolt fasteners fixed to both ends. Prior to pouring concrete for the upper ceiling slab and floor slab on each floor, the temporary main body hardware is attached to the fixing points of the wooden column in the ceiling slab and floor slab by positioning the base plates of the upper and lower column joint hardware parts on the lower or upper surfaces of the ceiling slab and floor slab, with the upper end of the wooden column joined to the column joint plate of the lower column joint hardware part. The temporary horizontal connecting hardware is positioned between the overhanging connecting hardware parts of the temporary main body hardware on both sides, via bolt members inserted across the bolt fasteners at both ends and the bolt fasteners at the overhanging tip of the overhanging connecting hardware part of the temporary main body hardware. Furthermore, a column positioning and fixing structure in a hybrid floor section, wherein the fastening and fixing positions of the bolt fasteners on the bolt members, which are inserted across the bolt fasteners at the protruding tip of the protruding connecting hardware and the bolt fasteners at both ends of the temporary horizontal connecting hardware, can be adjusted using nut members, thereby enabling the upper and lower ends of the wooden columns, which are joined to the column joining plates positioned above and below the ceiling slab and floor slab, to be fixed in predetermined positions.
2. The column positioning and fixing structure in a hybrid tiered section according to claim 1, wherein the ceiling slab and floor slab are formed integrally with the concrete beam, so that the multiple wooden columns are erected and installed between the upper and lower ceiling slabs and floor slabs with the concrete beam in between, and the temporary main body fitting is attached by positioning at least one of the base plates of the upper and lower column joint fittings on the lower or upper portion of the fixing location of the wooden column in the concrete beam, with the upper end of the wooden column joined to the column joint plate of the lower column joint fitting.
3. The column positioning and fixing structure in a hybrid floor section according to claim 1 or 2, wherein the vertical connecting hardware portion and the cantilever connecting hardware portion of the temporary main body hardware and the temporary horizontal connecting hardware are made of H-shaped steel.
4. The column positioning and fixing structure in a hybrid tiered section according to claim 1 or 2, wherein the bolt fastener at the overhanging tip portion of the overhanging connecting portion of the temporary main body fitting and the bolt fasteners at both ends of the temporary horizontal connecting fitting are made of cylindrical tubes.