Building

Abstract

To provide a building capable of effectively absorbing earthquake energy by utilizing the low rigidity of a wooden frame.SOLUTION: A building 10 has a core portion 32 constructed of steel frame, reinforced concrete, or steel-reinforced concrete; a vertical structural surface 36 located away from the core portion 32 and including a wooden frame 34, and a vibration control device 38 provided on the vertical structural surface 36.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a building.

Background Art

[0002] Patent Document 1 below discloses a structure including a first column-beam framework and a second column-beam framework disposed adjacent to the first column-beam framework and having an extension plane of a structural surface intersecting with the structural surface of the first column-beam framework. In this structure, the first column-beam framework and the second column-beam framework are connected only by a floor slab so that the out-of-plane force of the second column-beam framework is transmitted to the in-plane direction of the first column-beam framework.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the structure described in Patent Document 1 above, an example is disclosed in which a corrugated steel plate seismic wall and a steel brace are alternately arranged and attached to a plurality of vertical layers in the vertical direction on the structural surface of the second column-beam framework. However, it does not absorb energy at a relatively low-rigidity part of the structure, and there is room for improvement.

[0005] In consideration of the above facts, an object of the present invention is to provide a building that can effectively absorb seismic energy by utilizing the low rigidity of a wooden structure.

Means for Solving the Problems

[0006] The building according to the first aspect includes a core part configured to include a steel frame structure, a reinforced concrete structure, or a steel frame-reinforced concrete structure, a vertical surface including a wooden structure located at a position away from the core part, and a vibration damping device provided on the vertical surface.

[0007] According to the building of the first aspect, seismic forces concentrate on the core part of the building (i.e., the part with high rigidity). On the other hand, the vertical surface including the wooden structure, which is located at a position away from the core part, has low rigidity and is soft, so it deforms relatively greatly with respect to the core part. By arranging the vibration control device on this greatly deformed vertical surface, seismic energy can be efficiently absorbed by the vibration control device.

[0008] The building according to the second aspect is the building according to the first aspect, wherein a part of the vertical surface is composed of a steel frame structure to which the vibration control device is attached.

[0009] According to the building of the second aspect, a large force is applied to the structure of the vertical surface provided with the vibration control device. Therefore, by making the structure where the vibration control device is attached a hybrid structure with only a steel frame structure, the need for reinforcing the wooden structure is eliminated compared to the case where the vertical surface is composed only of a wooden structure.

[0010] The building according to the third aspect is the building according to the first aspect, wherein the core form of the core part is an eccentric core form, a center core form, or a bilateral core form, and the vertical surface is arranged away from and facing the core part, or arranged so as to be orthogonal to the core part.

[0011] According to the building of the third aspect, regardless of the core form, by providing a vibration control device on the vertical surface including the wooden structure, which is arranged away from and facing the core part, or arranged so as to be orthogonal to the core, seismic energy can be effectively absorbed.

Advantages of the Invention

[0012] According to the building of the present disclosure, by utilizing the low rigidity of the wooden structure, seismic energy can be effectively absorbed.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0014] Embodiments of the present invention will be described in detail based on the drawings. In each drawing, those having low relevance to the present invention are omitted from illustration.

[0015] 〔First Embodiment〕 The building according to the first embodiment will be described with reference to FIGS. 1 to 5. In FIG. 1, the building 10 according to the first embodiment is shown in a perspective view.

[0016] <Overall Configuration of the Building> As shown in FIG. 1, the building 10 is built on a foundation 12 made of reinforced concrete. As an example, the building 10 includes, from the lower side to the upper side in the vertical direction, a low-rise part 14 made of steel frame reinforced concrete, a middle-rise part 16 including a layer 16A composed of a hybrid of a wooden structure 34 and a core part 32 (see FIG. 2) to be described later, and a high-rise part 18 made of steel frame.

[0017] As an example, the low-rise part 14 is in the range from the 1st floor to the 3rd floor of the building 10, the middle-rise part 16 is in the range from the 4th floor to the 17th floor of the building 10, and the high-rise part 18 is the attic floor above the 18th floor of the building 10.

[0018] As an example, the layer 16A composed of a hybrid of the wooden structure 34 and the core part 32 (see FIG. 2) is not provided on all floors of the building 10, but is provided in the middle layer part 16 which is a part of the building 10 (for example, all floors or some floors of the middle layer part 16).

[0019] The lower layer part 14 includes a column-beam structure 25 in which columns 22 made of steel-reinforced concrete arranged substantially vertically and beams 24 made of steel-reinforced concrete arranged substantially horizontally are assembled in a lattice pattern. The columns 22 and the beams 24 are joined by, for example, butt welding or joining tools.

[0020] The upper layer part 18 includes a column-beam structure 29 in which columns 26 made of H-shaped steel arranged substantially vertically and beams 28 made of H-shaped steel arranged substantially horizontally are assembled in a lattice pattern. The columns 26 and the beams 28 are joined by, for example, butt welding.

[0021] In addition, in the building 10, the configuration of each floor including the lower layer part 14, the middle layer part 16, and the upper layer part 18 is not limited to the configuration shown in FIG. 1, and can be changed.

[0022] <Configuration of a part of the same floor of the building> FIG. 2 shows an example of the layer 16A which is a part of the same floor in the middle layer part 16 of the building 10 in a perspective view. As shown in FIG. 2, the building 10 includes a core part 32 configured to include a steel structure, a reinforced concrete structure, or a steel-reinforced concrete structure, and a vertical surface 36 located at a position away from the core part 32 and including a wooden structure 34. Further, the building 10 includes a vibration damping device 38 provided on the vertical surface 36.

[0023] In addition, in the building 10, a plurality of layers of the layer 16A including the core part 32, the vertical surface 36 including the wooden structure 34, and the vibration damping device 38 provided on the vertical surface 36 are provided in the middle layer part 16 of the building 10, but the present disclosure is not limited to this configuration. For example, a building having at least one layer of the layer 16A including the core part 32, the vertical surface 36 including the wooden structure 34, and the vibration damping device 38 provided on the vertical surface 36 may also be used.

[0024] (Core part) The core part 32 is configured to include a steel frame structure, a reinforced concrete structure, or a steel frame-reinforced concrete structure as described above, and is a part with high rigidity. The core part 32 is provided on a part of the upper side of the reinforced concrete floor slab 40. As an example, the core part 32 includes a plurality of columns 42 of a steel frame structure arranged substantially vertically and a plurality of beams 44 of a steel frame structure arranged substantially horizontally. The columns 42 and the beams 44 are joined by, for example, butt welding. Note that the columns 42 may be of a reinforced concrete structure or a steel frame-reinforced concrete structure instead of a steel frame structure. Also, the beams 44 may be of a reinforced concrete structure or a steel frame-reinforced concrete structure instead of a steel frame structure.

[0025] In FIG. 3, a layer 16A, which is a part of the same floor of the building 10, is shown in a schematic plan view. As shown in FIGS. 2 and 3, in the first embodiment, the core form of the core part 32 is an eccentric core form. More specifically, the building 10 has a rectangular outer shape in plan view, and the core part 32 is arranged so as to include one side surface of the rectangular outer shape (in the first embodiment, the longer side surface in the longitudinal direction). The core part 32 is not provided at positions including the other three side surfaces of the rectangular outer shape of the building 10. That is, the core part 32 is arranged eccentrically closer to one side surface of the rectangular outer shape of the building 10 in plan view.

[0026] Although not shown, in the building 10 of the first embodiment, seismic damping elements such as seismic damping walls may be provided in a part of the core part 32.

[0027] (Vertical surface including wooden structure) As shown in FIGS. 2 and 3, in the building 10, a structural part 37 (see FIG. 3) provided with a vertical surface 36 including a wooden structure 34 is arranged at a position away from the core part 32 so as to surround the core part 32. That is, the structural part 37 provided with the vertical surface 36 including the wooden structure 34 is arranged at a position including the side surface opposite to the core part 32 in the rectangular outer shape. The structural part 37 provided with the vertical surface 36 including the wooden structure 34 is a part with lower rigidity than the core part 32.

[0028] In a plan view, a frame portion 37 having a vertical surface 36 including a wooden structure 34 is provided at a portion away from a core portion 32 above a floor member 41 continuous with a reinforced concrete floor slab 40. The floor member 41 is composed of, for example, spun concrete or the like, but is not limited thereto. A tenant area 80, which is a space where a tenant can enter, is provided between the core portion 32 and the vertical surface 36 including the wooden structure 34 inside the building 10.

[0029] As an example, the wooden structure 34 includes columns (i.e., wooden columns) 52 arranged substantially vertically and composed of wooden members, and beams (i.e., wooden beams) 54 arranged substantially horizontally and composed of wooden members. In the first embodiment, in the middle portion of the vertical surface 36 in the building 10, both the columns 52 and the beams 54 are composed of wooden members. The joint portion of the columns 52 and the beams 54 composed of wooden members has a small rotational rigidity. Therefore, the frame portion 37 having the vertical surface 36 including the wooden structure 34 is relatively easily deformed with respect to the core portion 32. The joint portion of the columns 52 and the beams 54 will be described later.

[0030] In the first embodiment, the corner portion of the vertical surface 36 in the building 10 is composed of a steel frame structure 60 including a steel column 56 and a steel beam 58. As an example, the corner portion of the vertical surface 36 includes one steel column 56 made of steel and two steel beams 58 made of steel joined to the upper part of the column 56, but the present disclosure is not limited to this configuration. For example, a configuration including three steel columns 56 made of steel arranged at the corner portion and both sides of the corner portion of the building 10 and two steel beams 58 made of steel joined to the upper parts of the adjacent columns 56 may also be used.

[0031] When the frame portion 37 having the vertical surface 36 including the wooden structure 34 includes the steel frame structure 60, it preferably has columns 52 and beams 54 made of wooden members that account for more than half (i.e., more than half of the total number) of the total number of frames (columns and beams).

[0032] In the first embodiment, both the column 52 and the beam 54 are made of wooden members at the middle part of the vertical surface 36 including the wooden structure 34, but either the column 52 or the beam 54 may be made of a wooden member. For example, the wooden structure 34 may have a configuration including any one or more of a wooden column, a wooden beam, a joint portion with a wooden column, and a joint portion with a wooden beam.

[0033] FIG. 4 is a cross-sectional view showing an example of the joint portion 100. As shown in FIG. 4, the joint portion 100 includes a joint portion 102 made of reinforced concrete where the column 52 made of a wooden member and the beam 54 made of a wooden member are joined. As an example, the column 52 is joined to the joint portion 102 by an anchor bolt 104 embedded in the joint portion 102. A pair of plates 106 protruding to the left and right sides are embedded in the joint portion 102, and the respective plates 106 are inserted into slits (not shown) formed in the longitudinal direction in the beams 54 on both sides. The plates 106 are joined to the beam 54 by a plurality of drift pins 108.

[0034] In the joint portion 100 shown in FIG. 4, since the column 52 and the beam 54 are made of wooden members, the rigidity is lower compared to a steel frame ramen structure and a concrete frame ramen structure. The vertical surface 36 including the wooden structure 34 of the first embodiment preferably has a joint portion including any one or more of a wooden column, a wooden beam, a joint portion with a wooden column, and a joint portion with a wooden beam, and has more than half (that is, more than half of the total number of joint portions) of the entire joint portion.

[0035] (Vibration damping device) At the middle part of the vertical surface 36 including the wooden structure 34, one vibration damping device 38 is attached obliquely to the lower joint portion of the column 52 made of a wooden member and the upper joint portion of the beam 54 made of a wooden member. Also, another vibration damping device 38 is attached obliquely to the upper joint portion of the column 52 made of another wooden member and the lower joint portion of the beam 54 made of another wooden member.

[0036] Since the wooden frame 34 has low rigidity and is soft, it is relatively easy to deform significantly with respect to the core part 32. In the building 10 of the first embodiment, by providing the vibration control device 38 on the vertical surface 36 including the wooden frame 34, the deformation of the wooden frame 34 is utilized to efficiently absorb the energy of the vibration control device 38.

[0037] At the corner part of the vertical surface 36 including the wooden frame 34, the vibration control device 38 is attached in an oblique direction to the lower joint part of the column 56 made of steel frame at the corner and the upper joint part of the beam 58 made of steel frame joined to the column 56, respectively. That is, the corner part of the vertical surface 36 including the wooden frame 34 is composed of a steel frame structure 60 to which two vibration control devices 38 are attached. At the corner part of the vertical surface 36 including the wooden frame 34, when a large amount of energy is absorbed by the vibration control device 38, a large force is also applied to the surrounding frame. Therefore, by including the steel frame structure 60 in a part of the wooden frame 34, the load on the wooden members is reduced.

[0038] In the first embodiment, on both sides in the longitudinal direction of the building 10 in plan view, the configurations of each part are substantially symmetric about the left and right. That is, the arrangement of the vertical surface 36 including the wooden frame 34 and the arrangement of the vibration control device 38 provided on the vertical surface 36 are configured symmetrically about the left and right on both sides in the longitudinal direction of the building 10 in plan view.

[0039] An example of the vibration control device 38 is shown in FIG. 5. As shown in FIG. 5, the vibration control device 38 is of a brace type in which a brace as a cross member and a damper are integrated. More specifically, the vibration control device 38 includes a brace 72 and a damper 74 disposed at the middle part of the brace 72. Plates 76 are attached to the corner parts of the column 52 and the beam 54, and the brace 72 is rotatably connected to the plate 76 by hinges 78. By arranging the plates 76 and the hinges 78 at the opposing corner parts of the column 52 and the beam 54, respectively, the brace 72 is stretched obliquely across the corner parts of the column 52 and the beam 54. The vibration control device 38 reduces the load applied to the joint part of the column 52 and the beam 54 by the damper 74 causing the brace 72 to expand and contract during an earthquake.

[0040] Note that the vibration control device 38 is not limited to the brace type shown in FIG. 5, and other structures may be used. For example, the vibration control device may be a steel plate seismic wall (e.g., a corrugated steel plate seismic wall), an oil damper, or the like. Further, when attaching a vibration control device to the wooden structure 34, a stud type seismic wall, a small viscous body or viscoelastic body seismic wall, or a cane type metal damper attached to the corner of the joint between the column 52 and the beam 54 may be used.

[0041] <Function and Effect> Next, the function and effect of the first embodiment will be described.

[0042] The building 10 includes a core portion 32 configured to include a steel frame structure, a reinforced concrete structure, or a steel frame reinforced concrete structure, a vertical surface 36 located at a position separated from the core portion 32 and including a wooden structure 34, and a vibration control device 38 provided on the vertical surface 36.

[0043] According to the above building 10, seismic forces concentrate on the portion of the core portion 32 of the building 10 (i.e., the portion with high rigidity). On the other hand, the vertical surface 36 located at a position separated from the core portion 32 and including the wooden structure 34 has low rigidity and is soft, so it deforms relatively greatly with respect to the portion of the core portion 32. By arranging the vibration control device 38 on this greatly deformed vertical surface 36, seismic energy can be efficiently absorbed by the vibration control device 38.

[0044] Further, in the building 10, the corner portion of the vertical surface 36 including the wooden structure 34 is composed of a steel frame structure 60 to which the vibration control device 38 is attached.

[0045] According to the above building 10, a large force is applied to the structure of the vertical surface 36 provided with the vibration control device 38. Therefore, by making the structure to which the vibration control device 38 is attached a hybrid surface with only the steel frame structure 60, the need to reinforce the wooden structure 34 is eliminated compared to the case where the vertical surface 36 is composed only of the wooden structure 34.

[0046] Further, in the building 10, the core form of the core portion 32 is an eccentric core form, and the vertical surface 36 is arranged facing away from the core portion 32.

[0047] According to the building 10 described above, even in the case of an eccentric core type, by providing the vibration control device 38 on the vertical surface 36 including the wooden frame 34 arranged apart and facing the core part 32, seismic energy can be effectively absorbed.

[0048] In the building 10 of the first embodiment, the core part 32 is arranged so as to include the long side surface in the longitudinal direction of the rectangular outer shape. However, the present disclosure is not limited to this configuration. For example, the core part of the building 10 may be configured to be eccentrically arranged closer to the short side surface of the rectangular outer shape. That is, the core part may be configured to be eccentrically arranged closer to any side surface of the rectangular outer shape of the building 10.

[0049] Also, in the first embodiment, the steel frame structure 60 is arranged at the corner part of the vertical surface 36. However, the present disclosure is not limited to this configuration. For example, the steel frame structure 60 may be arranged at the central part of the vertical surface 36 including the wooden frame 34.

[0050] 〔Second Embodiment〕 Next, the building of the second embodiment will be described. For the same components as those in the first embodiment described above, the same numbers are assigned and the description thereof is omitted.

[0051] FIG. 6 shows a schematic plan view of a layer 202 which is a part of the same floor of the building 200 of the second embodiment. As shown in FIG. 6, the building 200 includes a core part 204 configured to include a steel structure, a reinforced concrete structure, or a steel-reinforced concrete structure, and a vertical surface 208 including a wooden frame 206, which is located at a position separated from the core part 204. Although not shown, the building 200 is provided with a vibration control device provided on the vertical surface 208.

[0052] In building 200, the core form of the core part 204 is the center core form, and the vertical surface 208 is arranged separately facing the core part 204. More specifically, in plan view, the building 200 has a rectangular outer shape, and the core part 204 is arranged in the middle part in the longitudinal direction of the rectangular outer shape. The vertical surface 208 including the wooden structure 206 is a pair of outermost surfaces sandwiching the core part 204, and is arranged at both ends in the longitudinal direction of the rectangular outer shape.

[0053] A tenant area 212, which is a space where a tenant can enter, is provided between the core part 204 and the vertical surface 208 including the wooden structure 206 inside the building 200. Note that other configurations of the building 200 are the same as those of the building 10 in the first embodiment.

[0054] In addition to the actions and effects by the same configuration as the building 10 in the first embodiment, the building 200 can obtain the following actions and effects.

[0055] In the building 200, the core form of the core part 204 is the center core form, and the vertical surface 208 including the wooden structure 206 is arranged separately facing the core part 204.

[0056] According to the above building 200, even if the core form of the core part 204 is the center core form, by providing a vibration damping device (not shown) on the vertical surface 208 including the wooden structure 206 arranged separately facing the core part 204, seismic energy can be effectively absorbed.

[0057] Note that in the building 200 of the second embodiment, the core part 204 is arranged in the central part in the longitudinal direction of the rectangular outer shape, but the present disclosure is not limited to this configuration. For example, the core part may be provided in the central part in the direction orthogonal to the longitudinal direction of the rectangular outer shape of the building 200, and may have a configuration with vertical surfaces including wooden structures at both ends in the direction orthogonal to the longitudinal direction of the rectangular outer shape.

[0058] 〔Third Embodiment〕 Next, the building of the third embodiment will be described. Regarding the same components as those in the above-described first and second embodiments, the same reference numerals will be given and their description will be omitted.

[0059] In FIG. 7, a floor 252, which is a portion on the same floor of the building 250 of the third embodiment, is shown in a schematic plan view. As shown in FIG. 6, the building 250 includes two core portions 254 configured to include a steel frame structure, a reinforced concrete structure, or a steel frame reinforced concrete structure.

[0060] In the building 250, the core form of the core portion 254 is a bilateral core form, and the vertical surface 258 including the wooden frame 256 is arranged so as to be orthogonal to the two core portions 254. Further, a vibration damping device 260 is provided on the vertical surface 258 including the wooden frame 256.

[0061] More specifically, in plan view, the building 250 has a rectangular outer shape, and the core portions 254 are arranged at both ends in the longitudinal direction of the rectangular outer shape. In other words, the core portions 254 are arranged at positions including the opposing outermost surfaces of the rectangular outer shape. The wooden frame 256 is arranged at the central portion in the longitudinal direction of the rectangular outer shape of the building 250, that is, at the central portion sandwiched by the core portions 254. The vibration damping device 260 is arranged between the pair of core portions 254 so as to intersect the longitudinal direction of the rectangular outer shape of the building 250. The vibration damping device 260 is provided along the direction in which the building 250 is likely to deform.

[0062] Between the core portions 254 at both ends and the wooden frame 256 inside the building 250, a tenant area 262, which is a space where a tenant can enter, is provided. Note that other configurations of the building 250 are the same as those of the building 10 of the first embodiment.

[0063] In addition to the operations and effects due to the same configuration as the building 10 of the first embodiment, the building 250 can obtain the following operations and effects.

[0064] In the building 250, the core form of the core part 254 is a bilateral core form, and the vertical surface 258 including the wooden structure 256 is arranged so as to be orthogonal to the two core parts 254. Further, a vibration control device 260 is provided on the vertical surface 258 including the wooden structure 256.

[0065] According to the above building 250, even if the core form of the core part 254 is a bilateral core form, by providing the vibration control device 260 on the vertical surface 258 arranged so as to be orthogonal to the core part 254, seismic energy can be effectively absorbed.

[0066] In the building 250 of the third embodiment, the core parts 254 are arranged at both ends in the longitudinal direction of the rectangular outer shape, but the present disclosure is not limited to this configuration. For example, the core parts may be provided at both ends in the direction orthogonal to the longitudinal direction of the rectangular outer shape of the building 250, and may have a configuration in which a vertical surface including a wooden structure is provided at a position sandwiched between the two core parts.

[0067] 〔Others〕 In the first to third embodiments, the configuration of the vibration control device is not limited to the configuration of the present disclosure and can be changed to other configurations. Further, in the present disclosure, as long as the vibration control device is provided on the vertical surface including the wooden structure, the position and number of the vibration control devices can be changed.

[0068] Although the present invention has been described in detail with respect to specific embodiments, it is obvious to those skilled in the art that the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention.

Explanation of Reference Numerals

[0069] 10 Building 32 Core Part 34 Wooden Structure 36 Vertical Surface 38 Vibration Control Device 52 Column (Column made of wooden members) 54 Beam (Beam made of wooden members) 56 Column (Steel column) 58 Beam (Steel Frame Beam) 60 Steel Frame Structure 200 Building 204 Core Part 206 Wood Frame Structure 208 Vertical Surface 250 Building 254 Core Part 256 Wood Frame Structure 258 Vertical Surface 260 Vibration Damping Device

Claims

1. A core part composed of a steel frame structure, a reinforced concrete structure, or a steel frame reinforced concrete structure, A vertical surface including a wooden frame structure located at a position away from the core part, A vibration damping device provided on the vertical surface, A building having the above.

2. The building according to claim 1, wherein a part of the vertical surface is composed of a steel frame structure to which the vibration damping device is attached.

3. The core form of the core part is an eccentric core form, a center core form, or a bilateral core form, and the vertical surface is arranged away from and facing the core part, or arranged perpendicular to the core part. The building according to claim 1.

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