Vibration-damping structure

Abstract

To provide a vibration control structure that can be installed in a narrow space and has good vibration control efficiency when a vibration control brace is installed across multiple floors.SOLUTION: In a vibration control structure in which a vibration control brace 50A is installed in a column-beam frame of a building, a vibration control brace 50A has a long steel material 51 and an oil damper 52 mounted in the extending direction of the steel material 51, and the vibration control brace 50A is placed diagonally across multiple stories in the column beam frame, and an opening part 25 is provided in a beam-member 22M, which is located at the intersection with the vibration control brace 50A, and the vibration control brace 50A is provided through the opening part 25.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a vibration-damping structure in which a vibration-damping brace is installed within a column-beam frame of a building. [Background technology]

[0002] Various proposals have been made to improve the vibration control performance of buildings. For example, vibration control braces have been individually installed on each floor of a building to improve the vibration control performance of buildings. However, because the displacement of the vibration control braces is small on each floor, there is room for improvement in vibration control efficiency. In response to this, for example, Patent Document 1 discloses a configuration in which vibration-damping braces (vibration-damping mechanisms) equipped with braces and dampers are installed across multiple stories. With this configuration, each vibration-damping brace attenuates displacements on multiple stories, improving vibration-damping efficiency. In the configuration disclosed in Patent Document 1, an intermediate beam member is provided on the intermediate floor where the brace spans, and extends across the brace. The intermediate beam member is placed at a different position in the direction perpendicular to the structural surface of the column-beam frame from the brace provided within the structural surface of the column-beam frame. For this reason, a large space is required in the direction perpendicular to the structural surface of the column-beam frame to install both the vibration control brace and the intermediate beam member.

[0003] In contrast, Patent Documents 2 and 3 disclose a configuration in which, when a vibration-damping brace (vibration-damping mechanism) having a brace and a damper that spans multiple floors is installed, no intermediate beam member is provided on the intermediate floors across which the brace spans. In the configurations disclosed in Patent Documents 2 and 3, since no intermediate beam members are provided, only braces need to be arranged in the direction perpendicular to the structural plane of the column-beam frame, and therefore a large space is not required for installation. On the other hand, in the configurations disclosed in Patent Documents 2 and 3, since no intermediate beam members are provided, the earthquake resistance of the building is reduced. Therefore, even if vibration-damping braces are effective, their effect is limited. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-39282 A [Patent Document 2] Patent No. 6837865 [Patent Document 3] JP 2018-178542 A Summary of the Invention [Problem to be solved by the invention]

[0005] The problem that the present invention aims to solve is to provide a vibration-damping structure that can be installed even in a narrow space when installing vibration-damping braces across multiple floors and has good vibration-damping efficiency. [Means for solving the problem]

[0006] The inventors of the present invention focused on the fact that, rather than placing a vibration-damping brace on each floor, a vibration-damping structure with vibration-damping braces can be achieved by creating openings in the beam members that make up the column-beam structure, penetrating the openings, and placing vibration-damping braces in a vertically diagonal direction across multiple floors, which allows a large amount of displacement to act on the ends of the materials on both sides of the vibration-damping brace, thereby efficiently reducing deformation of the building, and thus arrived at the present invention. In order to solve the above problems, the present invention employs the following means. In other words, the vibration control structure of the present invention is a vibration control structure in which a vibration control brace is installed within the column-beam frame of a building, and the vibration control brace comprises a long steel material and an oil damper attached in the extension direction of the steel material, or a long elastic-plastic damper and a viscoelastic damper attached to the elastic-plastic damper, and the vibration control brace is arranged diagonally across multiple floors within the column-beam frame plane, and an opening is provided in a beam member provided at a position intersecting with the vibration control brace, and the vibration control brace is arranged to pass through the opening. With this configuration, the vibration-damping braces are installed across multiple floors, so the displacement that occurs in the vibration-damping braces during an earthquake, etc. is greater than when they are installed individually on each floor. This makes it possible to efficiently reduce deformation of the building. In addition, beam members are provided on intermediate floors at positions that intersect with the vibration-damping braces that are arranged across multiple floors. In other words, the installation of the vibration-damping braces does not require the removal of beam members on intermediate floors, so the earthquake resistance of the building is not compromised. Furthermore, the vibration-damping brace is provided so as to pass through an opening formed in the beam member, so that the beam member suppresses buckling of the vibration-damping brace, thereby improving earthquake resistance. The above effects work synergistically to improve vibration damping efficiency. In addition, because the vibration-damping brace penetrates the beam member, there is no need to place the beam member in a position other than the direction perpendicular to the structural plane of the column-beam frame during installation, which reduces the space required to install the beam member. Therefore, when installing vibration-damping braces across multiple floors, it is possible to provide a vibration-damping structure that can be installed even in a small space and has good vibration-damping efficiency.

[0007] In one aspect of the present invention, in the vibration control structure of the present invention, the opening is a through hole that passes through the beam member in a vertically oblique direction, or a recess provided in a side surface of the beam member. According to this configuration, the vibration-damping brace is provided by penetrating a through hole that penetrates the beam member in a vertically oblique direction or a recess formed in a side surface of the beam member, thereby making it possible to form an opening through which the vibration-damping brace passes without dividing the beam member. In addition, the vibration-damping brace can be installed within the cross section of the beam member, that is, within the column-beam frame, in order to penetrate the through hole or recess. It can be placed even in narrow spaces within a column-beam structure, enabling the realization of a vibration-control structure with high design freedom.

[0008] In one aspect of the present invention, in the vibration-damping structure of the present invention, a surface of the beam member that forms the opening and the vibration-damping brace are arranged to slide against each other. With this configuration, the surface of the beam member that defines the opening and the vibration-damping brace can slide against each other, preventing the movement of the vibration-damping brace in the extension / contraction direction from being hindered, thereby efficiently improving the vibration-damping efficiency. In addition, the vibration-damping brace can be prevented from buckling by abutting against the surface of the beam member that forms the opening. Effect of the Invention

[0009] According to the present invention, when vibration-damping braces are installed across multiple floors, it is possible to provide a vibration-damping structure that can be installed even in a narrow space and has good vibration-damping efficiency. [Brief description of the drawings]

[0010] [Figure 1] 1 is a vertical cross-sectional view showing a vibration damping 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. 2 is an enlarged view of a portion of the building in FIG. 1 where vibration-damping braces are installed. [Figure 4] FIG. 4 is a cross-sectional view taken along line II-II of FIG. [Diagram 5] FIG. 13 is a diagram showing the results of a simulation of the behavior of a building during an earthquake. [Figure 6] FIG. 6 is a diagram showing the reduction rate of the maximum inter-story drift angle for the response results of the proposed model shown in FIG. 5. [Figure 7] 4 is a cross-sectional view of a vibration damping structure according to a first modified example of an embodiment of the present invention. FIG. [Figure 8] FIG. 11 is a cross-sectional view of a vibration damping structure in a second modified example of an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The present invention is a vibration-control structure in which, rather than placing a vibration-control brace on each floor, openings are made in the beam members that make up the column-beam structure of the building, and vibration-control braces are installed in a vertical diagonal direction through these openings, spanning multiple floors. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, with reference to the accompanying drawings, an embodiment for carrying out a vibration damping structure according to the present invention will be described based on the drawings. A vertical cross-sectional view showing a vibration damping structure according to an embodiment of the present invention is shown in Fig. 1. Fig. 2 is a horizontal cross-sectional view of part II in Fig. 1. Fig. 1 is also a vertical cross-sectional view of part III-III in Fig. 2. 1, a building 1 mainly comprises a foundation 2 constructed in the ground G, and a building main body 10 constructed on the foundation 2. Note that a part of the building main body 10 may comprise an underground portion formed in the ground G. The building body 10 includes a low-rise section 10L provided at the bottom of the building body 10, and a high-rise section 10H provided above the low-rise section 10L. Here, the number of floors of the low-rise section 10L and the high-rise section 10H is not limited in any way. The low-rise section 10L and the high-rise section 10H may have approximately the same number of floors, or the high-rise section 10H may have more floors than the low-rise section 10L. Also, the high-rise section 10H may have fewer floors than the low-rise section 10L. 2, the low-rise section 10L mainly includes an external frame section 20 and a core section 30. In the low-rise section 10L, the external frame section 20 constitutes the outer periphery of the building 1. The core section 30 is provided inside the external frame section 20.

[0012] In this embodiment, the core section 30 has a rectangular shape in a plan view, and generally has a generally cylindrical shape that is continuous in the up-down direction. The core section 30 has columns 31 and beam members 32. The columns 31 are provided at the corners of the rectangular shape. The beam members 32 are installed between adjacent columns 31 in each story of the core section 30. A gap S1 is provided between the core section 30 and the external frame section 20. The external frame section 20 and the core section 30 are provided so as to be spaced apart from each other in the horizontal direction. Inside the core section 30, for example, a tower parking lot, an elevator shaft, a staircase, etc. are provided. The external frame section 20 has an external column 21, a beam member 22, and an internal column 23. A plurality of external columns 21 are arranged on the outer periphery of the external frame section 20. Each external column 21 extends continuously in the vertical direction over the entire height of the building body 10. A plurality of internal columns 23 are arranged on the inner periphery of the external frame section 20 at positions facing the core section 30. Each internal column 23 is provided outside the core section 30 and spaced apart from the core section 30. Each internal column 23 extends continuously in the vertical direction over the entire height of the building body 10. The beam members 22 are installed between adjacent external columns 21, between adjacent internal columns 23, and between the external columns 21 and the internal columns 23 in each story of the external frame section 20.

[0013] A vibration-damping brace 50A is installed in the column-beam frame of the external frame section 20 of such a building 1. In this embodiment, the vibration-damping brace 50A is provided on the inner peripheral surface of the external frame section 20 facing the core section 30, on the structural surfaces of two column-beam frames located opposite each other in the vertical direction of the paper of FIG. 2. The vibration-damping brace 50A is installed between each of the three internal columns 23 that are provided adjacent to each other in the horizontal direction of the paper of FIG. 2. The vibration-damping brace 50A is arranged diagonally across multiple floors in the column-beam frame surface. In this embodiment, the vibration-damping brace 50A is arranged diagonally across, for example, two stories. The vibration-damping brace 50A may be arranged diagonally across, for example, three or more stories. FIG. 3 is an enlarged view of the lower floors of the building of FIG. As shown in Fig. 3, the vibration-damping brace 50A includes, for example, a long steel material 51 and an oil damper 52 attached in the extension direction D of the steel material 51. One end of the long steel material 51 in the extension direction D is joined, for example, by a pin, to a bracket 24A provided at a joint J1 between the internal column 23 and the upper beam member 22A. One end of the oil damper 52 is attached to the other end of the long steel material 51 in the extension direction D. The other end of the oil damper 52 is joined, for example, by a pin, to a bracket 24B provided at a joint J2 between the internal column 23 and the lower beam member 22B. The oil damper 52 absorbs and attenuates tensile and compressive forces acting on the vibration-damping brace 50A during an earthquake or the like. FIG. 4 is a cross-sectional view taken along the line II-II of FIG. As shown in Figs. 3 and 4, an opening 25 is provided in the beam member 22M of the middle floor, which is disposed between the upper beam member 22A and the lower beam member 22B and intersects with the middle part in the extension direction D of the vibration-damping brace 50A. The opening 25 is a through hole 25h that penetrates the beam member 22M in a vertically oblique direction along the extension direction D of the vibration-damping brace 50A. The through hole 25h is formed in the beam member 22M at the center of the beam width direction W that is perpendicular to the extension direction D of the beam member 22M in the horizontal plane. The steel material 51 of the vibration-damping brace 50A is inserted into the through hole 25h.

[0014] When viewed in cross section on a horizontal plane as shown in Fig. 4, the steel material 51 of the vibration-dissipating brace 50A has a length in the beam width direction W that is shorter than the length in the length direction L that is perpendicular to the beam width direction W in the horizontal plane and parallel to the extension direction D. For this reason, when a compressive force is applied to the vibration-dissipating brace 50A, the vibration-dissipating brace 50A is more likely to buckle in the beam width direction W than in the length direction L. In order to suppress buckling that may occur in this way and to allow relative displacement of the vibration-dissipating brace 50A with respect to the beam member 22M during an earthquake as will be described later, the vibration-dissipating brace 50A and the surface of the beam member 22M that forms the opening 25 are arranged to slide against each other. More specifically, a sliding plate 55 made of metal, particularly stainless steel, is provided on the surface of the through hole 25h that faces the steel material 51 of the vibration-damping brace 50A in the beam width direction W. Also, a sliding material 56 made of a fluorine-based resin such as polytetrafluoroethylene is provided on the surface of the steel material 51 of the vibration-damping brace 50A that faces the through hole 25h in the beam width direction W. The sliding plate 55 and the sliding material 56 are provided in contact with each other. In this manner, the surface of the through hole 25h and the steel material 51 of the vibration-damping brace 50A are configured to abut against each other via the sliding plate 55 and the sliding material 56. In this embodiment, the sliding plate 55 and the sliding material 56 are not provided in the portion of the surface of the through hole 25h and the steel material 51 of the vibration-damping brace 50A that faces each other in the length direction L, and the surface of the through hole 25h and the steel material 51 of the vibration-damping brace 50A are separated from each other to form a gap S2. Alternatively, the sliding plate 55 and the sliding material 56 may be provided between the surface of the through hole 25h and the steel material 51 of the vibration-damping brace 50A in the portion that faces each other in the length direction L, and the surface of the through hole 25h and the steel material 51 of the vibration-damping brace 50A may be configured to abut against each other via the sliding plate 55 and the sliding material 56.

[0015] In a vibration-damping structure having such a vibration-damping brace 50A in the column-beam frame of the building 1, a displacement is input to the steel material 51 such that the vibration-damping brace 50A expands and contracts in the extension direction D due to the relative displacement between the connection part J1 between the upper beam member 22A of the vibration-damping brace 50A and the internal column 23 and the connection part J2 between the lower beam member 22B of the vibration-damping brace 50A and the internal column 23 during an earthquake or the like. Since the vibration-damping brace 50A is provided across multiple floors, the displacement input to the vibration-damping brace 50A during an earthquake or the like is larger than when the braces are provided individually on each floor. The displacement input to the vibration-damping brace 50A during an earthquake or the like is transmitted to the steel material 51 of the vibration-damping brace 50A as a tensile force or a compressive force. Such tensile force and compressive force are absorbed and attenuated by the oil damper 52 of the vibration-damping brace 50A. Here, the vibration-damping brace 50A is provided penetrating through an opening 25 formed in a beam member 22M. In particular, the surface of the opening 25, i.e., the through-hole 25h, and the steel material 51 of the vibration-damping brace 50A are in contact with each other via a sliding plate 55 and a sliding material 56. Therefore, the beam member 22 suppresses buckling of the vibration-damping brace 50A, improving earthquake resistance. As described above, when oil damper 52 absorbs and attenuates the tensile and compressive forces transmitted to steel material 51 of vibration-damping brace 50A, steel material 51 is displaced relative to beam member 22M. At this time, because through hole 25h of beam member 22M and steel material 51 are arranged to slide against each other via slide plate 55 and slide material 56, the above-mentioned relative displacement is not prevented.

[0016] According to the vibration control structure as described above, a vibration control brace 50A is installed within the column-beam structure of building 1, and the vibration control brace 50A comprises a long steel material 51 and an oil damper 52 attached in the extension direction D of the steel material 51. The vibration control brace 50A is arranged diagonally across multiple floors within the surface of the column-beam structure, and an opening 25 is provided in the beam member 22M arranged at a position intersecting with the vibration control brace 50A, and the vibration control brace 50A is arranged to pass through the opening 25. With this configuration, the vibration-damping braces 50A are installed across multiple floors, so that the displacement that occurs in the vibration-damping braces 50A during an earthquake or the like is greater than when they are installed individually on each floor. This makes it possible to efficiently reduce deformation of the building 1. In addition, beam members 22M arranged on intermediate floors are provided at positions that intersect with vibration-damping braces 50A arranged across multiple floors. In other words, since the beam members 22M on intermediate floors are not discarded when installing vibration-damping braces 50A, the earthquake resistance of building 1 is not impaired. Furthermore, the vibration-damping brace 50A is provided so as to penetrate through an opening 25 formed in the beam member 22. Therefore, the beam member 22M suppresses buckling of the vibration-damping brace 50A, improving earthquake resistance. The above effects work synergistically to improve vibration damping efficiency. In addition, because the vibration-damping brace 50A penetrates the beam member 22M, there is no need to arrange the beam member 22M in different positions in the direction perpendicular to the structural plane of the column-beam frame during installation. Therefore, the space required to install the beam member 22M can be small. Therefore, when providing vibration-damping braces 50A across multiple floors, they can be installed even in small spaces, and it is possible to provide a vibration-damping structure with good vibration-damping efficiency.

[0017] Moreover, the opening 25 is a through hole 25h that penetrates the beam member 22M in a vertically oblique direction. According to this configuration, the vibration-damping brace 50A is provided by penetrating the through hole 25h that penetrates the beam member 22M in a vertically oblique direction. This makes it possible to form the opening 25 through which the vibration-damping brace 50A penetrates without dividing the beam member 22M. In addition, because the vibration-damping brace 50A passes through the through hole 25h, the vibration-damping brace 50A can be installed within the cross section of the beam member 22M, that is, within the column-beam frame. This allows the vibration-damping brace 50A to be placed even in a narrow space within the column-beam frame, achieving a vibration-damping structure with high design freedom.

[0018] Further, the surface of the beam member 22M that forms the opening 25 and the vibration-damping brace 50A are provided so as to slide against each other. With this configuration, the surface of the beam member 22M that defines the opening 25 and the vibration-damping brace 50A slide against each other, preventing the movement of the vibration-damping brace 50A in the expansion / contraction direction from being hindered. This makes it possible to efficiently improve the vibration-damping efficiency. Furthermore, by the vibration-damping brace 50A abutting against the surface of the beam member 22 that defines the opening 25, buckling of the vibration-damping brace 50A can be suppressed.

[0019] In particular, in this embodiment, the surface of the beam member 22M that forms the opening 25 and the vibration-damping brace 50A are provided so as to abut against and slide on each other via the sliding plate 55 and the sliding member 56. According to such a configuration, it is possible to appropriately realize a structure that suppresses buckling of the vibration-dissipating brace 50A in the out-of-plane direction, while not inhibiting relative displacement between the vibration-dissipating brace 50A and the beam member 22M.

[0020] The behavior of the vibration-damping structure described above during an earthquake was simulated. As an example, a three-dimensional analysis model with the configuration described above with reference to FIG. 2 was prepared. The building was 23 stories tall, with the first floor having a floor height of 5500 mm, the second floor having a floor height of 5000 mm, and each floor from the third floor onwards having a floor height of 3350 mm. Each floor had an area of ​​3340 mm x 3080 mm, and the span between columns had the dimensions shown in FIG. 2. The vibration-damping brace 50A was provided so as to span three stories. The vibration-damping brace 50A was provided in total of 16 pieces, with two pieces on each of the two structural faces on the 5th to 7th floors, the 8th to 10th floors, the 11th to 13th floors, and the 14th to 16th floors. The oil damper 52 used had a maximum damping force of 150 t. In contrast, as a comparative example, an earthquake-resistant model was prepared for a building similar to that of the embodiment, but with brace materials installed on each floor within the column-beam framework of each floor. For each model of the embodiment and the comparative example as described above, the design earthquake motion (notification is level 2) indicated by the Ministry of Land, Infrastructure, Transport and Tourism was input assuming a huge earthquake. FIG. 5 is a diagram showing the results of simulating the response behavior of a building during an earthquake for the proposed model of the present invention and the earthquake-resistant model of the conventional technology. FIG. 6 is a diagram showing the change in the story height direction of the building in the response reduction rate of the proposed model with respect to the earthquake-resistant model for the maximum story drift angle shown in FIG. 5. As shown in FIG. 5, the embodiment shown by line L1 has a smaller maximum story drift angle at each floor than the comparative example shown by line L2. As shown in FIG. 6, the embodiment has a maximum story drift angle reduced by about 20% compared to the comparative example, and it can be confirmed that the vibration control efficiency is good by providing the vibration control brace to span multiple floors according to the present invention.

[0021] (First Modification of the Embodiment) The vibration damping 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 present invention. For example, in the above embodiment, the through hole 25h is formed in the center of the beam member 22M in the beam width direction W as the opening 25 through which the vibration-damping brace 50A penetrates, but this is not limited thereto. For example, as in a first modified example shown in FIG. 7, a recess 25g recessed toward the other side in the beam width direction W may be provided on one side surface 22s of the beam member 22M in the beam width direction W as the opening 25 through which the vibration-damping brace 50A penetrates. The recess 25g extends in a vertical oblique direction, similar to the through hole 25h. In this case, the middle part of the vibration-damping brace 50A in the extension direction D is contained within the recess 25g. The middle part of the vibration-damping brace 50A in the extension direction D is exposed to one side of the beam member 22M in the beam width direction W. In this modified example, as in the above embodiment, the surface of the beam member 22M forming the opening 25 and the vibration-damping brace 50A are provided so as to abut and slide against each other via the sliding plate 55 and the sliding member 56. Thus, in this modified example, the opening 25 is a recess 25g provided in the side surface 22s of the beam member 22M. Even with this configuration, when the vibration-damping brace 50A is provided to span multiple floors, it can be installed even in a small space, and it is possible to provide a vibration-damping structure with good vibration-damping efficiency.

[0022] (Second Modification of the Embodiment) 8, recesses 25g, 25k may be provided as openings 25 through which the vibration-damping brace 50A passes in each of a side surface 22s on one side and a side surface 22t on the other side in the beam width direction W of the beam member 22. In this case, the vibration-damping braces 50A are provided in a pair with a gap between them in the beam width direction W of the beam member 22. In this modified example, the pair of vibration-damping braces 50A are arranged parallel to each other, i.e., so that their extension directions D are the same. Alternatively, the pair of vibration-damping braces 50A may be arranged so that they cross each other to form an X-shape when viewed from the beam width direction W, which is a direction perpendicular to the structural plane of the column-beam frame. Each vibration-damping brace 50A is housed in a recess 25g, 25k. The middle part in the extension direction D of the vibration-damping brace 50A on the surface 22s side in the beam width direction W is exposed from the surface 22s. The middle part in the extension direction D of the vibration-damping brace 50A on the surface 22t side in the beam width direction W is exposed from the surface 22t. In this modified example, as in the above embodiment, the surface of the beam member 22M that forms the opening 25 and the vibration-damping brace 50A are arranged to abut and slide against each other via the sliding plate 55 and the sliding member 56. Thus, in this modified example, the opening 25 is the recesses 25g, 25k provided in the side surfaces 22s, 22t of the beam member 22M. Even with this configuration, when the vibration-damping brace 50A is provided to span multiple floors, it can be installed even in a small space, and it is possible to provide a vibration-damping structure with good vibration-damping efficiency.

[0023] (Other Modifications of the Embodiment) In the above embodiment and the first and second modified examples, the vibration-damping brace 50A is configured to include the steel material 51 and the oil damper 52, but the present invention is not limited to this. For example, as shown in Fig. 3, the vibration-damping brace 50B may be a so-called hybrid damper that includes a long elastic-plastic damper 57 and a viscoelastic damper 58 attached to the elastic-plastic damper 57. For example, a buckling-restrained brace is used as the elastic-plastic damper 57. The buckling-restrained brace includes a brace shaft member made of a steel material with a cross section, and a buckling stiffener member made of a bundle of multiple square steel pipes arranged to surround the brace shaft member. The viscoelastic damper 58 damps the relative displacement between the brace shaft member of the elastic-plastic damper 57 and the buckling stiffener member. According to the vibration control structure as described above, a vibration control brace 50B is installed in the column-beam frame of the building 1, and the vibration control brace 50B includes a long elastic-plastic damper 57 and a viscoelastic damper 58 attached to the elastic-plastic damper 57. The vibration control brace 50B is arranged diagonally across multiple floors within the plane of the column-beam frame, and an opening 25 is provided in the beam member 22M arranged at a position intersecting with the vibration control brace 50B, and the vibration control brace 50B is arranged to pass through the opening 25. With this configuration, the vibration-damping braces 50B are installed across multiple floors, so that the displacement that occurs in the vibration-damping braces 50B during an earthquake or the like is greater than when they are installed individually on each floor. This makes it possible to efficiently reduce deformation of the building 1. In addition, beam members 22M arranged on intermediate floors are provided at positions that intersect with vibration-damping braces 50B arranged across multiple floors. In other words, since the beam members 22M on intermediate floors are not discarded when installing vibration-damping braces 50B, the earthquake resistance of building 1 is not impaired. Furthermore, the vibration-damping brace 50B is provided so as to penetrate through an opening 25 formed in the beam member 22. Therefore, the beam member 22M suppresses buckling of the vibration-damping brace 50B, improving earthquake resistance. The above effects work synergistically to improve vibration damping efficiency. In addition, because the vibration-damping brace 50B penetrates the beam member 22M, there is no need to arrange the beam member 22M in different positions in the direction perpendicular to the structural plane of the column-beam frame during installation. Therefore, the space required to install the beam member 22M can be small. Therefore, when providing vibration-damping braces 50B across multiple floors, they can be installed even in small spaces, and it is possible to provide a vibration-damping structure with good vibration-damping efficiency.

[0024] (Other variations) In addition, in the above embodiment and its modified example, a vibration-damping structure has been described, but the configuration of the building 1 is merely an example, and the number of floors, plan layout, etc. may be changed as appropriate. For example, a building in which a vibration-damping structure as described above is provided may not be a structure having a core portion, but may be a structure composed of columns and beams as a whole, like the external framework portion described above. Furthermore, the installation positions and number of vibration-damping braces 50A, 50B can also be changed as appropriate. 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]

[0025] 1 Building 50A, 50B Vibration-damping braces 22, 22M Beam member 51 Steel material 22s, 22t side 52 oil damper 25 Opening 57 Elastoplastic damper 25g, 25k recess 58 Viscoelastic damper 25h Through hole D Stretching direction

Claims

1. A vibration-damping structure in which a vibration-damping brace is installed within the structural surface of a column-beam frame of a building, The vibration-damping brace includes a long steel material and an oil damper attached in the extension direction of the steel material, or includes a long elastic-plastic damper and a viscoelastic damper attached to the elastic-plastic damper, The vibration control brace is disposed diagonally across multiple floors within the structural surface of the column-beam frame, An opening is provided in the beam member provided at a position intersecting the vibration-damping brace, and the vibration-damping brace is provided to pass through the opening, The vibration-damping brace has a cross-sectional shape that is shorter in the width direction than in the direction perpendicular to the width direction of the beam member and is more likely to buckle in the width direction than in the perpendicular direction, A vibration-damping structure characterized in that a surface of the beam member forming the opening and a surface of the vibration-damping brace, which are opposed to each other in the width direction, are arranged to abut and slide against each other via a sliding plate and a sliding material.

2. 2. The vibration damping structure according to claim 1, wherein the opening is a through hole that passes through the beam member in a vertically oblique direction, or a recess provided in a side surface of the beam member.

3. The opening is a pair of recesses provided on one side surface and the other side surface of the beam member in the width direction, The vibration-damping braces are provided in a pair spaced apart in the width direction, The pair of vibration-damping braces are arranged parallel to each other, or cross each other to form an X-shape when viewed from the width direction, 3. The vibration-damping structure according to claim 1, wherein each of the pair of vibration-damping braces is housed in each of the pair of recesses.

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