Building structure

Abstract

To provide a building structure capable of stably absorbing vibrational energy.SOLUTION: A building structure comprises a multi-story brace 51 which has an X-shaped brace 53 installed on an inner peripheral side of a column-beam frame 40 continuously in a vertical direction over a plurality of floors, and a vibration damping beam 55 which is provided inside the column-beam frame 40s adjoining the multi-story brace 51.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a building structure in which braces and vibration-damping beams that absorb vibration energy are installed inside the building. [Background technology]

[0002] Various proposals have been made to improve the earthquake performance of buildings. For example, Patent Document 1 discloses a configuration including a plurality of horizontal members provided adjacent to each other in the vertical direction, a first brace body provided above each horizontal member, a second brace body provided below the horizontal members and displaced relative to the first brace body, and a vibration damper connected to the first brace body and the second brace body. In such a configuration, the vibration damper attenuates (absorbs) the relative displacement energy between the first brace body and the second brace body that occurs when an earthquake occurs. Patent Document 2 discloses a structure including a brace installed in a space of a steel structural frame formed by combining beams and columns, end steel pipes arranged on both ends of the brace, and an intermediate steel pipe made of extremely low yield point steel interposed between the brace and the steel structural frame. In this structure, the intermediate steel pipe made of extremely low yield point steel absorbs the relative displacement energy between the brace and the steel structural frame that occurs during an earthquake. Patent Document 3 discloses a structure in which all columns in a specific intermediate layer are divided into upper and lower parts and laminated rubber is inserted between them to reduce the horizontal rigidity of the intermediate layer compared to other layers, making it a deformation concentration layer, and a seismic damper is inserted between the deformation concentration layer and the layer immediately above. In this structure, the relative displacement energy between the deformation concentration layer and the layer immediately above that occurs during an earthquake is absorbed by the seismic damper. It is always desirable to absorb vibration energy in a more stable manner. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-6965 A [Patent Document 2] Japanese Patent Application Publication No. 8-135251 [Patent Document 3] JP 2002-161648 A Summary of the Invention [Problem to be solved by the invention]

[0004] The problem to be solved by the present invention is to provide a building structure capable of stably absorbing vibration energy. [Means for solving the problem]

[0005] The inventors developed the present invention by focusing on the fact that, as a building structure capable of stably absorbing vibration energy, a multi-story brace is formed by installing X-shaped braces in a vertical direction continuously across multiple floors, and vibration control beams are installed in the column-beam structure adjacent to the multi-story brace.In this way, in the event of an earthquake, the multi-story brace, which has high rigidity like a core, can keep deformation in the building within the elastic deformation range, while the adjacent vibration control beams can efficiently absorb vibration energy. In order to solve the above problems, the present invention employs the following means. In other words, the building structure of the present invention is characterized in that it comprises a multi-story brace in which X-shaped braces spanning multiple floors are installed continuously in the vertical direction on the inner periphery of a column-beam structure, and a vibration control beam provided in the column-beam structure adjacent to the multi-story brace. According to this configuration, the multi-story brace is formed by providing the X-shaped brace across multiple floors in a vertical direction on the inner periphery side of the column-beam frame. The multi-story brace has high rigidity on the inner periphery side of the column-beam frame and functions as a core, so that the deformation of the building is suppressed to the elastic deformation range and the concentration of deformation on a specific floor is suppressed. Since the X-shaped brace is installed so as to span multiple floors, the elevation angle of the brace with respect to the floor slab can be made larger than when a brace is provided for each floor. This makes it possible to more effectively resist the force acting in the in-plane direction of the column-beam frame. Since the vibration control beam is provided in the column-beam frame adjacent to such a multi-story brace, when an earthquake occurs, the multi-story brace, which has high rigidity as a core, can suppress the deformation occurring in the building to the elastic deformation range, while the vibration control beam provided in the adjacent column-beam frame can efficiently absorb the vibration energy. Furthermore, even if the deformation becomes excessive, the damage is limited to the vibration control beam, and the impact on the entire building is suppressed. In this way, a building structure capable of stably absorbing vibration energy can be provided.

[0006] In one aspect of the present invention, a floor slab is provided above the vibration-damping beam, and a gap is provided between the vibration-damping beam and the floor slab. According to this configuration, a gap is provided between the vibration control beam and the floor slab, so that the vibration control beam and the floor slab are structurally separated. This allows the vibration control beam to behave as it is without being restrained by the floor slab when an earthquake occurs. Therefore, when an earthquake occurs, the vibration control beam can efficiently absorb earthquake energy.

[0007] In one aspect of the present invention, the multi-story brace is installed continuously from the basement floor to an intermediate floor above ground level or to the top floor. With this configuration, by installing the multi-story braces continuously from the basement floor to the middle floors above ground or to the top floor, even if the horizontal stiffness of a particular floor is lower than the other general floors, the horizontal force can be transmitted to the basement floor by the X-shaped braces that span multiple floors. Therefore, in the event of an earthquake, the concentration of deformation on a particular floor can be suppressed, improving the structural safety of the building. Effect of the Invention

[0008] According to the present invention, a building structure capable of stably absorbing vibration energy can be realized. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a vertical cross-sectional view showing a configuration of a building structure according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view of part II in FIG. [Diagram 3] FIG. 3 is a longitudinal sectional view taken along line II-II of FIG. 2. [Figure 4] A vertical cross-sectional view showing a gap formed between a vibration control beam and the floor slab above it. [Diagram 5] FIG. 3 is a vertical cross-sectional view taken along the line III-III in FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The present invention is a building structure comprising a multi-story brace in which X-shaped braces are installed continuously in the vertical direction across multiple floors, and vibration control beams are provided in the column-beam structure adjacent to the multi-story brace. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, with reference to the accompanying drawings, a description will be given of a form for carrying out a building structure according to an embodiment of the present invention based on the drawings. Fig. 1 is a vertical cross-sectional view showing the configuration of a building equipped with a building structure according to an embodiment of the present invention. Fig. 2 is a horizontal cross-sectional view of part II in Fig. 1. Fig. 1 is also a cross-sectional view of part VV in Fig. 2. Fig. 3 is a vertical cross-sectional view of part II-II in Fig. 2. As shown in FIG. 1, a building 1 having a building structure according to this embodiment includes a foundation 2 constructed in the ground G, an underground structure 3 provided on the foundation 2, and an upper structure 4. In this embodiment, the foundation 2 is made of a spread foundation 21 provided with a foundation beam and a mat slab. The underground structure 3 constitutes a basement floor portion of the building 1. The underground structure 3 includes a plurality of underground columns 31 constructed on the foundation 2, and an underground beam 32 erected between adjacent underground columns 31. The underground columns 31 are provided so as to be located directly below columns 41 of the upper structure 4 described later. The underground columns 31 are, for example, made of concrete-filled steel pipe (CFT) construction or reinforced concrete-filled steel pipe (RCFT) construction in which reinforcing bars are arranged inside the steel pipes of the concrete-filled steel pipe columns. The underground beams 32 are, for example, made of steel-framed reinforced concrete construction or reinforced concrete construction.

[0011] The upper structure 4 is provided on the underground structure 3. The upper structure 4 has multiple floors in the vertical direction. As shown in FIG. 2, the upper structure 4 of the building 1 has a rectangular shape in a plan view, with a first direction D1 in the horizontal plane as its long side and a second direction D2 intersecting the first direction D1 in the horizontal plane as its short side. As shown in FIG. 1, the upper structure 4 includes a column-beam structure 40 and a vibration control wall 50 constructed inside the column-beam structure 40. The column-beam frame 40 is configured as a rigid frame structure having a plurality of columns 41 and beams 42. Each column 41 is, for example, made of concrete-filled steel pipes and extends vertically above the underground columns 31. For example, in the lower layer of the superstructure 4, the columns 41 are made of reinforced concrete-filled steel pipe (RCFT) construction, in which reinforcing bars are arranged inside the steel pipes of the concrete-filled steel pipe columns, continuing from the underground columns 31. In addition, the columns 41 are, for example, made of ultra-high strength material (590 N / mm for architectural structures) in the lowest layer of the superstructure 4. 2 grade steel [SA440 material] or TMCP steel for building structure [590N / mm 2 This increases the axial rigidity of the lower part of the column 41, and suppresses bending deformation of the building 1. The beams 42 are, for example, made of steel with an H-shaped cross section, and are erected between adjacent columns 41 on each floor of the superstructure 4.

[0012] The vibration-damping walls 50 are provided continuously in the vertical direction across multiple floors inside the upper structure 4. As shown in FIG. 2, the vibration-damping walls 50 are provided along the second direction D2 in plan view. A plurality of vibration-damping walls 50 are provided at appropriate locations inside the upper structure 4. For example, in this embodiment, the vibration-damping walls 50 are provided at both ends in the first direction D1 of the core portion 46, which is provided in a rectangular shape in the center of the upper structure 4 in plan view. The core portion 46 is provided with, for example, an elevator shaft, a staircase, etc. Note that there is no limitation on the installation position or the number of vibration-damping walls 50. 3, the vibration-damping wall 50 includes a multi-story brace 51 and vibration-damping beams 55 provided on both sides of the multi-story brace 51. The vibration-damping wall 50 is formed between adjacent columns 41 in the second direction D2. The multi-story brace 51 includes a pair of vibration-damping studs 52, a beam 56 for each floor, and an X-shaped brace 53. The pair of vibration-damping studs 52 are disposed adjacent to each other with a gap in between in the second direction D2 between the columns 41 adjacent to each other in the second direction D2. Each vibration-damping stud 52 extends vertically across the floors.

[0013] The X-shaped brace 53 is disposed between a pair of vibration-damping studs 52. The X-shaped brace 53 is provided across multiple floors. In this embodiment, the X-shaped brace 53 is provided across two floors located above and below each other. The X-shaped brace 53 across two floors includes a pair of upper brace members 53a, 53b between a beam 56C located in the middle in the vertical direction, a beam 56A on the floor directly above it, and adjacent vibration-damping studs 52. The pair of upper brace members 53a, 53b are disposed in a V-shape so that the interval in the second direction D2 gradually increases from the bottom to the top. The upper ends of the upper brace members 53a, 53b are joined to brackets 54A provided at the joints between the vibration-damping studs 52 and both ends of the beam 56A in the second direction D2. The lower end portions of the upper brace members 53a and 53b are joined to a bracket 54B provided on the upper surface of the beam 56C at the center in the second direction D2. The X-shaped brace 53 includes a pair of lower brace members 53c, 53d between a beam 56C located in the vertical middle, a beam 56B on the floor immediately below, and adjacent vibration-damping studs 52. The pair of lower brace members 53c, 53d are arranged in an inverted V-shape so that the distance between them in the second direction D2 gradually increases from top to bottom. The lower ends of the lower brace members 53c, 53d are joined to brackets 54C provided at the joints between the vibration-damping stud 52 and both ends of the beam 56B in the second direction D2. The upper ends of the lower brace members 53c, 53d are joined to brackets 54D provided on the lower surface of the beam 56C at the center in the second direction D2.

[0014] As shown in FIG. 3, a set of X-shaped braces 53, which is composed of upper brace members 53a and 53b and lower brace members 53c and 53d, is provided in a rectangle formed by a pair of vibration-damping studs 52 and beams 56A and 56B. The center of each column-beam joint where a pair of vibration-damping studs 52 and beams 56A and 56B are joined is D when viewed from the side as shown in FIG. 3. At this time, the upper brace members 53a and 53b and the lower brace members 53c and 53d are provided so as to extend on a diagonal line shown as a two-dot chain line in FIG. 3, which connects points D located at diagonal corners in a rectangle with four points D as corners. In other words, the upper brace members 53a and 53b and the lower brace members 53c and 53d are provided so as to extend radially from the center C of the rectangle toward each corner D. In this embodiment, each of the upper brace materials 53a, 53b and the lower brace materials 53c, 53d is formed of a steel pipe 53p having a square central portion. A steel material 53k having a cross-shaped cross section is joined to an end of the steel pipe 53p, and the steel material 53k is joined to brackets 54A to 54D. In this embodiment, the X-shaped brace 53 is provided continuously in the vertical direction from the lowest floor of the underground structure 3 to the highest floor of the upper structure 4. With the above-described configuration, the X-shaped brace 53 is provided at the same position on each floor when viewed in plan.

[0015] As shown in FIG. 3, the vibration control beams 55 are joined to the multi-story brace 51 for each floor. The vibration control beams 55 are installed between the vibration control studs 52 and the adjacent columns 41 on both sides of the multi-story brace 51 in the second direction D2. That is, the vibration control beams 55 are installed in the column-beam frame 40s that is formed between the multi-story brace 51 and the column 41 adjacent to the multi-story brace 51 and forms part of the column-beam frame 40 adjacent to the multi-story brace 51. In this way, the vibration control beams 55 of each floor are arranged adjacent to the multi-story brace 51 so as to be connected in the vertical direction. As a result, the vibration control beams 55 are provided at the same position on each floor when viewed in a plan view. In this embodiment, the vibration control beam 55 has an energy absorbing portion 55a made of, for example, extremely low yield point steel in the center. The vibration control beam 55 is a short-span beam having a shorter horizontal span than the other beams 42, 56 on the same floor. Such a multi-story brace 51 functions like a strong core rod extending vertically in the upper structure 4. In the upper structure 4, when an earthquake occurs, the energy of the relative displacement occurring between the strong multi-story brace 51 and the surrounding column-beam structure 40 is absorbed by the deformation of the energy absorbing portion 55a of the vibration control beam 55 provided adjacent to the multi-story brace 51.

[0016] Here, in this embodiment, the multi-story brace 51 having a pair of vibration-damping studs 52 and an X-shaped brace 53 is installed continuously from the lowest floor to the highest floor in the upper structure 4. Also, the multi-story brace 51 having a pair of vibration-damping studs 52 and an X-shaped brace 53 is continuously provided not only in the upper structure 4 but also in the underground structure 3. That is, the multi-story brace 51 is continuously provided from the basement floor to the top floor of the building 1 on the ground floor. In contrast, the vibration-damping beam 55 is not provided in the underground structure 3 constituting the basement floor of the building 1. Also, the vibration-damping beam 55 is not provided at the top including the top floor of the building 1. That is, the vibration-damping wall 50 having both the multi-story brace 51 and the vibration-damping beam 55 is continuously provided from the lowest floor of the building 1 on the ground floor to the middle floor (a floor lower than the top floor). In addition, the vibration-damping wall 50 equipped with the multi-story brace 51 and the vibration-damping beam 55 may be provided continuously from the ground floor to the top floor of the building 1.

[0017] FIG. 4 is a vertical cross-sectional view showing a gap formed between a vibration control beam and a floor slab above it. As shown in Fig. 4, a floor slab 100 is provided on each floor to support floor materials and the like that form the floor surface F. The floor slab 100 includes a floor slab body 110 and a PC floor slab 120. The floor slab body 110 is supported by steel beams 101. The beams 101 are installed at appropriate intervals between the beams 42 of each floor. The floor slab body 110 is laid on the multiple beams 101. The PC floor slab 120 is provided above the vibration control beam 55. The PC floor slab 120 is arranged so as to cover the vibration control beam 55 from above. The PC floor slab 120 is arranged between the floor slab bodies 110 arranged on both sides in the first direction D1, sandwiching the vibration control beam 55. The PC floor slab 120 closes the space between the floor slab bodies 110 on both sides in the first direction D1. The upper surface 120t of the PC floor slab 120 is set at the same height as the upper surface 110t of the floor slab body 110. In other words, the PC floor slab 120, together with the floor slab body 110, forms the floor slab 100 of each floor. The PC floor slab 120 is supported by a small beam 101 that supports the end of the floor slab body 110 on both sides of the vibration control beam 55 in the first direction D1. The small beam 101 is integrally provided with a floor slab support member 102 that supports the PC floor slab 120. The floor slab support member 102 has a rising portion 102a that rises upward from the end of the upper flange 101a that supports the floor slab body 110 along the side of the floor slab body 110, and a support portion 102b that extends horizontally from the upper end of the rising portion 102a and supports the underside of the PC floor slab 120. The PC floor slab 120 is supported from below by the support portion 102b of the floor slab support member 102 on both sides of the first direction D1. The thickness T1 of the PC floor slab 120 is smaller than the thickness T2 of the floor slab body 110. As a result, the underside of the PC deck 120 is positioned higher than the underside of the floor slab main body 110, and a gap S is provided between the vibration control beam 55 and the PC deck 120 supported by the deck support member 102. In addition, the PC deck 120 is detachable by simply being placed on the support portion 102b of the deck support member 102. This makes it possible to easily remove the PC deck 120 when performing maintenance on the vibration control beams 55, when replacing the PC deck 120, etc.

[0018] FIG. 5 is a vertical sectional view taken along the line III-III of FIG. As shown in FIG. 2, in addition to the vibration-damping wall 50, the building 1 is provided with, for example, a brace structure 60. The brace structure 60 is provided continuously in the vertical direction across multiple floors inside the upper structure 4. In a plan view, the brace structure 60 is provided perpendicular to the vibration-damping wall 50 and along the first direction D1. A plurality of brace structures 60 are provided at appropriate locations inside the upper structure 4. For example, in this embodiment, the brace structures 60 are provided on both sides in the second direction D2 at the ends of the core portion 46 in the first direction D1. Note that there is no limitation on the installation position or the number of the brace structures 60. 5, the braced structure 60 includes a braced column-beam structure 61 and a vibration-damping beam 65. The braced structure 60 is formed between columns 41 adjacent to each other in the first direction D1. The braced beam-column frame 61 includes studs 62, beams 66 for each floor, and braces 63. The studs 62 are disposed in the middle between adjacent columns 41 in the first direction D1, and extend vertically across the floors. The brace 63 is provided to extend obliquely between the column 41 and the stud 62, which are spaced apart from each other in the first direction D1 of the brace frame 60, and two beams 66, which are located above and below each other. Both ends of the brace 63 are joined to brackets 64 provided at the joints between the column 41, the stud 62, and the beam 66, respectively. In addition, the upper side material ends of the brace 63 are joined to the ends of the beams 66 connected to the vibration control beams 65. In this embodiment, the brace 63 is formed of a steel pipe 63b having a square central portion. A steel material 63k having a cross-shaped cross section is joined to the end of the steel pipe 63b of the brace 63, and the steel material 63k is joined to the bracket 64. Such a braced column-beam structure 61 is provided continuously across multiple floors in the vertical direction. With the above-described configuration, in the braced column-beam structure 61, the braces 63 are provided at the same positions on each floor when viewed in plan. In the braced column-beam structure 61, the braces 63 suppress deformation of the column-beam structure, and vibration energy can be efficiently absorbed by the vibration control beams 65 of the braced structure 60 connected to the braced column-beam structure 61.

[0019] The vibration control beams 65 are joined to the braced column-beam frame 61 for each floor. The vibration control beams 65 are installed between the partition 62 and the column 41, which is provided away from the partition 62, on the side of the braced frame 60 opposite the partition 62. In this way, the vibration control beams 65 of each floor are arranged adjacent to the braced column-beam frame 61 so as to be connected in the vertical direction. As a result, the vibration control beams 65 are provided in the same position on each floor when viewed in a plan view. In this embodiment, the vibration-damping beam 65 is a vibration-damping beam having an energy absorbing portion 65a made of, for example, extremely low yield point steel in the center. The vibration-damping beam 65 is a short-span beam having a shorter horizontal span than the other beams 42 and 66 on the same floor.

[0020] 2, the building 1 is further equipped with a viscoelastic damper 71 and oil dampers 72A and 72B. In this embodiment, the viscoelastic damper 71 and the oil dampers 72 and 72B are provided in the core portion 45. For example, the viscoelastic damper 71 is provided between a pair of columns 41 to which one ends of the vibration control beams 65 are connected, and extends in the second direction D2. The oil damper 72A is provided to extend in a first direction D1 between a partition 70 provided between the pillars 41 and the pillars 41. The oil damper 72B is provided to extend in a second direction D2 between a pair of pillars 41 to which one end of the oil damper 72A is connected.

[0021] According to the building structure as described above, the inner periphery of the column-beam structure 40 is provided with a multi-story brace 51 in which X-shaped braces spanning multiple floors are installed continuously in the vertical direction, and a vibration control beam 55 is provided in the column-beam structure 40s adjacent to the multi-story brace 51. According to this configuration, the multi-story brace 51 is formed by providing the X-shaped brace 53 across multiple floors in a vertical direction on the inner periphery of the column-beam frame 40. The multi-story brace 51 has high rigidity on the inner periphery of the column-beam frame 40 and functions as a core, so that the deformation of the building 1 is suppressed to the elastic deformation range and the concentration of deformation on a specific floor is suppressed. Since the X-shaped brace 53 is installed across multiple floors, the elevation angle of the braces 53a, 53b, 53c, and 53d with respect to the floor slab 100 can be made larger than when a brace is provided for each floor. This makes it possible to more effectively resist forces acting in the in-plane direction of the column-beam frame 40. Since vibration-damping beams 55 are provided in the column-beam frames 40s adjacent to such multi-story braces 51, when an earthquake occurs, the multi-story braces 51, which have high rigidity as a core, can suppress deformation occurring in the building 1 to the elastic deformation range, while the vibration-damping beams 55 provided in the adjacent column-beam frames 40s can efficiently absorb vibration energy. Even if deformation becomes excessive, damage is limited to the vibration-damping beams 55, and the impact on the entire building 1 is suppressed. In this way, a building structure capable of stably absorbing vibration energy can be provided.

[0022] In particular, in this embodiment, the vibration control beams 55 are joined to the multi-story braces 51 for each floor. In a building 1 having such a configuration, vibration energy is absorbed on each floor, so that the occurrence of large local deformation on a particular floor is suppressed.

[0023] In addition, a floor slab 100 (PC floor slab 120) is provided above the vibration control beam 55, and a gap S is provided between the vibration control beam 55 and the floor slab 100. According to this configuration, a gap S is provided between the vibration control beam 55 and the floor slab 100, so that the vibration control beam 55 and the floor slab 100 are structurally separated. As a result, when an earthquake occurs, the behavior of the vibration control beam 55 can be secured without being restrained by the floor slab 100. Therefore, when an earthquake occurs, the vibration control beam 55 can efficiently absorb earthquake energy.

[0024] In addition, the multi-story brace 51 is installed continuously from the basement floor of the building 1 to the intermediate floors above ground level or to the top floor. According to this configuration, by providing the multi-story braces 51 continuously from the basement floor to the intermediate floors above ground or to the top floor, even if the horizontal stiffness of a particular floor is lower than the other general floors, the horizontal force can be transmitted to the basement floor by the X-shaped braces 53 spanning multiple floors. Therefore, in the event of an earthquake, the concentration of deformation on a particular floor can be suppressed, improving the structural safety of the building.

[0025] The building structure of the present invention is not limited to the above-described embodiment explained with reference to the drawings, and various modifications are possible within the technical scope of the invention. For example, the overall configuration of the building 1 is not limited to the form described as the above embodiment, and may be any configuration. In the above embodiment, the multi-story brace 51 is composed of a pair of vibration-damping studs 52, a beam 56 for each floor, and an X-shaped brace 53, but it may be composed of adjacent columns 41, a beam 56 for each floor, and an X-shaped brace 53 without providing a vibration-damping stud. Also, the braced column-beam frame 61 is composed of a stud 62, a beam 66 for each floor, and a brace 63, but it may be composed of a column 41 forming a brace frame 60 connected to the braced column-beam frame 61, a beam 66 for each floor, and a brace 63 without providing a stud 62. In the above embodiment, the vibration-damping walls 50 including the multi-story braces 51 and the vibration-damping beams 55 are arranged on both sides of the core portion 45 in the first direction D1, but the configuration, arrangement, installation number, etc. of the core portion 45 and the vibration-damping walls 50 can be changed as appropriate. In addition, the vibration-damping walls 50 including the multi-story braces 51 and the vibration-damping beams 55 may be provided at a position other than the core portion 45. In addition, the configurations described in the above embodiments can be selected or changed as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0026] 1 Building 55 Vibration-damping beam 40 Column beam frame 100 Floor slab 40s Column-beam structure adjacent to multi-story brace 120 PC floor slab 51 Multi-layer brace S Gap 53 X-shaped brace

Claims

1. A multi-story brace is a brace in which X-shaped braces are installed continuously in the vertical direction across multiple floors on the inner periphery of the column-beam frame; A vibration control beam provided in a column-beam frame adjacent to the multi-story brace, The multi-story brace includes a pair of vibration-damping studs arranged between the columns constituting the column-beam frame, an X-shaped brace arranged between the pair of vibration-damping studs and spanning two stories, and a beam arranged on each floor and connecting the pair of vibration-damping studs, The brace material constituting the X-shaped brace has one end joined to the center portion of the beam and the other end joined to the joint between the beam and the vibration-damping stud, A building structure characterized in that the vibration-damping beam is installed between the vibration-damping stud provided with the joint and a column of the column-beam frame.

2. A floor slab is provided above the vibration control beam, 2. The building structure according to claim 1, wherein a gap is provided between the vibration control beam and the floor slab.

3. 3. The building structure according to claim 1, wherein the multi-story brace is installed continuously from a basement floor to an intermediate floor above ground or from the top floor.

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