building

Abstract

To provide a building which has an open ceiling space, and can secure excellent vibration control performance.SOLUTION: A building 1 has an open ceiling space 20. The building 1 includes: a plurality of studs 50 arranged facing the open ceiling space 20 and for connecting upper and lower floors with each other; and vibration control dampers 60 for connecting the studs 50 with each other. The vibration control damper 60 extends in a direction separated by a plurality of floors in a vertical direction and separated by a predetermined distance in a horizontal direction. In the case where the building 1 vibrates by an external force such as an earthquake and strong wind, the vibration control dampers 60 absorb the vibration of the building 1, so that the vibration of the building 1 can be reduced, and excellent vibration control performance can be secured.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a building having a vibration damper inside the building. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there are buildings equipped with vibration control devices such as dampers inside the buildings (see Patent Documents 1 to 3). Patent Document 1 shows a building in which a rocking body is placed in an open-ceiling space inside the building. The upper end of the rocking body is fixed to the top of the building, and the lower end is connected to the bottom of the building via an oil damper. When an external force acts on the building due to an earthquake or wind, causing bending deformation in the building, the oil damper absorbs the shaking. Patent Document 2 shows a vibration-controlled building in which dampers are provided on the column-beam structure surrounding the atrium. Braces are provided across multiple floors in the atrium. The upper part of the brace is connected to the column-beam structure of the ceiling of the atrium via the damper. In Patent Document 3, the structure includes a middle section made of reinforced concrete, a lower section made of steel frame and provided below the middle section, and a high section made of steel frame and provided above the middle section. A vibration control device extending diagonally is provided in the high section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-261247 A [Patent Document 2] JP 2018-135655 A [Patent Document 3] JP 2019-100156 A Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a building that has an open-ceiling space and can ensure excellent vibration control performance. [Means for solving the problem]

[0005] The inventors came up with the present invention after focusing on the fact that, in a building with an open-air space, by installing partition posts facing the open-air space and connecting the upper and lower floors, and further installing vibration dampers diagonally between the partition posts so as to span multiple floors, it is possible to ensure high vibration control performance by having the vibration dampers absorb the vibration energy caused by deformation that occurs between the multiple floors of the building without narrowing the living space. A building of the first invention (for example, building 1 described below) is a building having an open-air space (for example, open-air space 20 described below) and is provided with a plurality of partitions (for example, partitions 50 described below) arranged facing the open-air space and connecting upper and lower floors, and vibration dampers (for example, vibration dampers 60 described below) connecting the partitions, the vibration dampers extending in directions spaced apart by several floors in the vertical direction and a predetermined distance in the horizontal direction.

[0006] Here, the vibration damper includes one or more of a viscous damper, a viscoelastic damper, and a friction damper. The open-ceiling space includes a multi-storey car park and an elevator shaft. According to this invention, the vibration dampers are arranged diagonally across multiple floors facing the open-ceiling space. Therefore, when the building shakes due to external forces such as an earthquake or strong winds, the vibration dampers absorb the building's vibrations, reducing the building's shaking and ensuring excellent vibration control performance.

[0007] The building of the second invention comprises a pillar (e.g., pillar 10A described below) arranged facing the open-air space, a pair of beams (e.g., beam 11A described below) joined to the pillar, and a pair of cantilever beams (e.g., cantilever beam 41 described below) protruding from each of the pair of beams toward the open-air space, and the studs are supported by the tips of the pair of cantilever beams.

[0008] According to this invention, the studs are supported at the tips of a pair of cantilever beams extending from the beam, so that the pillars, girders and cantilever beams work together to resist deformation of the building, thereby reducing the swaying of the building. In addition, in high-rise reinforced concrete buildings, columns are often made of high-strength concrete because they are subject to heavy loads. Therefore, it is not possible to install cantilever beams by driving post-installed anchors into the columns. In the present invention, a cantilever beam is installed on the beam, so that studs and vibration dampers can be installed post-installed on high-rise reinforced concrete buildings.

[0009] The building of the third invention comprises a column (e.g., column 10A described below) arranged facing the open-air space, a pair of beams (e.g., beam 11A described below) joined to the column, and a support portion (e.g., support portion 70 described below) protruding from the pair of beams toward the open-air space, wherein the support portion has a pair of cantilever beams (e.g., cantilever beam 71 described below) joined to beams on both sides of the column, and a cross member (e.g., cross member 72 described below) connecting the tips of the pair of cantilever beams, and the partition post is supported at the middle of the cross member.

[0010] According to this invention, the partition posts are supported at the tips of a pair of cantilever beams extending from the beam, so that the columns, girders, cantilever beams and cross members work together to resist deformation of the building, thereby reducing the swaying of the building. In addition, in high-rise reinforced concrete buildings, columns are often made of high-strength concrete because they are subject to heavy loads. Therefore, it is not possible to install cantilever beams by driving post-installed anchors into the columns. In the present invention, a cantilever beam is installed on the beam, so that studs and vibration dampers can be installed post-installed on high-rise reinforced concrete buildings. Effect of the Invention

[0011] According to the present invention, a building can be provided that has an open-ceiling space and ensures excellent vibration control performance. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a plan view of a building according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view of the building shown in FIG. 1 along line AA. [Diagram 3] FIG. 2 is a schematic plan view of a support portion according to the first embodiment. [Figure 4] FIG. 2 is a schematic side view showing the structure of a support part according to the first embodiment. [Diagram 5] FIG. 4 is a diagram showing behavior of the building according to the first embodiment when a horizontal force acts on the building. [Figure 6] FIG. 2 is a vertical cross-sectional view of a three-dimensional model of a building. [Figure 7] FIG. 13 is a diagram showing the results of a simulation of the behavior of a building during an earthquake. [Figure 8] FIG. 11 is a schematic plan view of a support portion according to a second embodiment of the present invention. [Figure 9] FIG. 11 is a plan view of a building according to a modified example of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present invention is a building in which partitions are provided facing an open-ceiling space to connect upper and lower floors, and vibration dampers are further provided diagonally between the partitions so as to span multiple floors. Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same components are denoted by the same reference numerals, and the description thereof will be omitted or simplified. [First embodiment] Fig. 1 is a plan view of a building 1 according to a first embodiment of the present invention. Fig. 2 is a cross-sectional view of the building 1 taken along line AA in Fig. 1. Fig. 3 is a schematic plan view of a support portion 40 of the building 1. Building 1 is a high-rise apartment building made of reinforced concrete, and includes columns 10, beams 11, and floor slabs 12. In plan view, a rectangular open-ceiling space 20 is provided in the center of the interior of building 1. That is, in plan view, the framework of building 1 is square-shaped, and surrounds open-ceiling space 20 on all four sides. The column and beam, which are structural members facing open-ceiling space 20, are referred to as column 10A and beam 11A, respectively. A common corridor 30 consisting of a rectangular frame-shaped floor slab 12 is provided surrounding this atrium space 20. The common corridor 30 is made up of four straight corridors 31, 32, 33, and 34. Each of the straight corridors 31 and 33 is supported by two adjacent support parts 40. The support part 40 supporting the straight corridor 31 and the support part 40 supporting the straight corridor 33 face each other.

[0014] Each of the support parts 40 is substantially V-shaped in plan view and is composed of a pair of steel-framed cantilever beams 41 that protrude from each of a pair of beams 11A on both sides of the column 10A toward the open-ceiling space 20. The tips of the pair of cantilever beams 41 are joined to each other. Steel-framed studs 50 are provided between the upper and lower supports 40. Specifically, the studs 50 are provided at the joints between the tips of the cantilever beams 41 that make up the supports 40. Therefore, these studs 50 face the open-ceiling space 20. 4, the steel-framed stud 50 and the steel-framed cantilever beam 41 that constitutes the support part 40 are rigidly connected, and the steel-framed cantilever beam 41 that constitutes the support part 40 and the reinforced concrete beam 11A are pin-connected. As a result, when an external force is applied to the building 1 due to an earthquake or strong wind, the vertically connected studs 50 and the multiple upper and lower supports 40 rigidly connected to these studs 50 resist it as a whole.

[0015] 1 and 2, vibration dampers 60 are provided between adjacent support parts 40 that are vertically spaced apart by three layers. Vibration dampers 60 are also provided between opposing support parts 40 that are vertically spaced apart by three layers. For example, vibration dampers 60 are provided between joint P between the support part 40 and the stud 50 and joints Q and R between the support part 40 and the stud 50 that are distant from this joint. The vibration damper 60 is a viscous damper that absorbs vibrations in the axial direction. When no horizontal force is applied to the building 1, the length of the vibration damper 60 is L. As shown in FIG. 6, the partition 50 and the vibration damper 60 do not necessarily need to be installed on the first floor of the building 1, but may be installed on an intermediate floor of the building 1. As shown in FIG. 5, when a horizontal force in the direction of the arrow is applied to building 1 due to an earthquake or strong wind, building 1 deforms, and vibration damper 60A is subjected to a tensile force and expands to a length L1, while vibration damper 60B is subjected to a compressive force and contracts to a length L2.

[0016] The behavior of the above-mentioned three-dimensional model M of building 1 during an earthquake was simulated. This three-dimensional model M has a structure as shown in FIG. 1 when viewed from above, and a structure as shown in FIG. 6 when viewed from a vertical cross section. Specifically, each cantilever beam of the support section is made of steel members (H-shaped steel) of H-600×300×16×32, and the stiffness Kb of this cantilever beam is set to 1.36e5N / mm. Since the support section is made up of two cantilever beams, the stiffness Kb of the support section is 2.72e5N / mm. In addition, the studs are made of steel members of O-500×32×3000, and the stiffness Kc of these studs is set to 3.22e6N / mm. In other words, the stiffness of the studs is set to about 10 times or more the stiffness of the cantilever beams. In this way, the cantilever beams of each floor are connected by high-rigidity studs, so the stress borne by the cantilever beams of each floor is roughly equal.

[0017] The vibration dampers were installed every three stories, and the maximum damping force of the vibration dampers was set to 150t or 200t. The input earthquake motion was the long-period design earthquake motion ("OS2 of the basic impingement wave") specified by the Ministry of Land, Infrastructure, Transport and Tourism, assuming a huge earthquake. As a result, as shown in FIG. 7, when the vibration dampers and studs were not installed in the building, the maximum inter-story drift angle significantly exceeded 1 / 100 in the lower floors of the building, but when the vibration dampers and studs of the present invention were installed in the building, the maximum inter-story drift angle was below 1 / 100 in all floors of the building. Therefore, it was found that the maximum inter-story drift angle can be significantly suppressed by installing the vibration dampers and studs of the present invention.

[0018] According to this embodiment, the following effects are obtained. (1) The vibration dampers 60 are arranged diagonally across multiple floors facing the open atrium space 20. Therefore, when the building 1 shakes due to an external force such as an earthquake or strong wind, instead of installing vibration dampers on each floor and using the vibration dampers to absorb the relative displacement of each floor, the vibration dampers 60 are installed across multiple floors and the vibration dampers 60 absorb the relative displacement occurring between the multiple floors, thereby efficiently reducing the shaking of the building 1. Therefore, excellent vibration control performance can be ensured. Also, since the vibration dampers 60 are not installed on each floor, the number of vibration dampers 60 installed can be reduced.

[0019] (2) The support parts 40 of the upper and lower floors are connected to each other by the partitions 50 facing the open atrium space 20, and furthermore, the vibration control dampers 60 are arranged between the partitions 50 so as to span multiple floors. Therefore, the shaking of the building 1 is transmitted not only to the floor on which the vibration control damper 60 is installed, but also to the structures of the floors above and below, including the floor on which the vibration control damper 60 is installed, via the partitions 50, ensuring high earthquake resistance. (3) Since the partition 50 is supported at the tips of a pair of cantilever beams 41 extending from the beam 11A, the pillar 10A, the girder 11A, and the cantilever beams 41 work together to resist deformation of the building 1, thereby reducing the swaying of the building 1. Furthermore, since a cantilever beam 41 is provided on the beam 11A, studs 50 and vibration dampers 60 can be attached to high-rise reinforced concrete buildings through post construction.

[0020] Second Embodiment FIG. 8 is a schematic plan view of a support portion 70 according to the second embodiment of the present invention. In this embodiment, the structure of the support part 70 is different from that of the first embodiment. That is, the support part 70 is made of steel and includes a pair of cantilever beams 71 joined to beams 11A on both sides of the column 10A, and a cross member 72 connecting the tips of the pair of cantilever beams 71. The partition 50 is supported at the center of the cross member 72. According to this embodiment, in addition to the above-mentioned (1) to (3), the following effects are obtained. (4) Since the cantilever beam 71 and the cross member 72 that constitute the support portion 70 are made of steel, no cracks will occur in the support portion 70, and the cantilever beam 71 and the cross member 72 can be easily bolted together. In addition, the cantilever beam 71 and the cross member 72 can be replaced relatively easily.

[0021] The present invention is not limited to the above-described embodiment, and modifications and improvements within the scope of the present invention that can achieve the object of the present invention are included in the present invention. For example, in each of the above-described embodiments, two support parts 40 are provided in each of the straight corridors 31 and 33, and vibration dampers 60 are provided between these support parts 40. However, this is not limited to the above. As shown in FIG. 9, one support part 40 may be provided in each of the straight corridors 31 to 34, and vibration dampers 60 may be provided between the opposing support parts 40. In addition, in each of the above-mentioned embodiments, the structure of the building 1 is U-shaped in plan view and surrounds the open-air space 20 on all four sides, but this is not limited to the above, and the structure of the building may be U-shaped in plan view and surround the open-air space on three sides. In addition, in each of the above-described embodiments, the end of the vibration damper 60 is joined to the joint between the support portion 40 and the partition 50, but this is not limited to the above, and the end of the vibration damper may be joined to the mid-height position of the partition. [Explanation of symbols]

[0022] 1, 1A…Building 10…Column 10A…Column facing the atrium 11...Beam 11A...Beam facing the open-ceiling space 12...Floor slab 20...Open ceiling space 30...Common corridor 31, 32, 33, 34...Straight corridor 40... Support portion 41... Cantilever beam 50... Stud 60, 60A, 60B... Vibration damper 70...support part 71...cantilever beam 72...cross member

Claims

1. A building with an open ceiling space, A column arranged facing the atrium space; A pair of beams joined to the columns; A pair of cantilever beams protruding from each of the pair of beams toward the atrium space; A plurality of studs are arranged facing the atrium space and supported by the tip ends of the pair of cantilevers to connect the upper and lower floors; and a vibration damper connecting the studs to each other, A building characterized in that the vibration dampers extend in directions spaced apart by several floors in the vertical direction and a predetermined distance in the horizontal direction.

2. A building with an open ceiling space, A column arranged facing the atrium space; A pair of beams joined to the columns; Support portions protruding from the pair of beams toward the atrium space; A plurality of studs are arranged facing the atrium space and supported by the support portions to connect the upper and lower floors; and a vibration damper connecting the studs to each other, The vibration dampers extend in a direction spaced apart by a plurality of floors in the vertical direction and a predetermined distance in the horizontal direction, The support portion includes a pair of cantilever beams joined to beams on both sides of the column, and a cross member connecting tip ends of the pair of cantilever beams to each other, A building characterized in that the studs are supported at the middle portions of the cross members.

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