JP2021076010A - Damping building - Google Patents

Abstract

To provide a damping building which has high damping performance while reducing restrictions on the arrangement plan of a living room by installing a damping device in a column beam frame surrounding a stairwell part.SOLUTION: A damping building 1 is a damping building 1 in which a damper 32 is provided on a column beam frame 25 surrounding a stairwell part H. The stairwell part H is formed over a plurality of floors, the damper 32 is provided on the upper part or the lower part of braces 31, 31 provided on the column beam frame 25.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vibration-damping building in which a vibration-damping device is installed in a column-beam frame surrounding the atrium space in a building having the atrium space.

There is a seismic design method that reduces the seismic response acceleration of the upper floors by concentrating the horizontal deformation during an earthquake on the lower floors by making the horizontal rigidity of the lower floors of the building smaller than the horizontal rigidity of the upper floors.
For example, Patent Document 1 discloses a soft first story building in which the horizontal rigidity of a lower floor is made smaller than that of an upper floor, and a hardening type viscous damper is provided on the lower floor to absorb vibration energy. ..
Further, Patent Document 2 describes a long-period control structure in which the horizontal rigidity of the lower floor of the structure is a flexible structure and vibration damping devices are provided on columns and beam frames to prolong the vibration cycle of the structure. It is disclosed.
Patent Document 3 provides a Y-shaped strut member and two brace-type dampers arranged in a V-shape on the lower floors while making the horizontal rigidity of the lower floors smaller than the horizontal rigidity of the upper floors. The building is disclosed.

Patent Documents 1 to 3 show a vibration damping building provided with various vibration damping devices on the lower floors having lower horizontal rigidity than the upper floors.

Japanese Patent No. 4297282 Japanese Unexamined Patent Publication No. 9-310530 Japanese Unexamined Patent Publication No. 2009-30253

An object of the present invention is to provide a vibration-damping building having high vibration-damping performance against an earthquake while ensuring a degree of freedom in the layout planning of living rooms for a building having a stairwell space.

As a vibration damping structure used for a mid-to-high-rise building having a stairwell, the present inventors arrange a brace in the beam structure inside the building surrounding the stairwell or in the beam structure on the outer periphery thereof. When a vibration damping device is installed between the brace and the column-beam structure, and the vibration damping device is installed on each floor by giving the amount of horizontal deformation across multiple floors as the input displacement amount of the damper. The present invention has been made by paying attention to the fact that a high damping effect can be obtained as compared with the above.
The present invention employs the following means in order to solve the above problems.
That is, the vibration damping building of the present invention is a vibration damping building in which a vibration damping device is provided in a column-beam frame surrounding the atrium, and the atrium is formed over a plurality of floors. It is characterized in that it is installed at the upper or lower part of the brace extending to the plurality of floors.
According to such a configuration, the amount of horizontal displacement acting on the vibration damping device is the amount of inter-story displacement that occurs in the atrium that spans multiple floors, which greatly exceeds the amount of inter-story displacement of one floor, and is the amount of inter-story displacement that occurs in a small earthquake. Since seismic energy can be efficiently absorbed from the minute deformation stage, it is possible to realize a building with excellent not only structural safety performance but also environmental vibration performance. The vibration damping structure is a passive vibration damping structure in which a brace extending to a plurality of floors is installed in a column-beam frame surrounding the atrium and a vibration damping device is installed above or below the brace.
For example, in a building having a stairwell portion, the horizontal rigidity of the stairwell portion is relatively smaller than the horizontal rigidity excluding the stairwell portion, and the building having the stairwell portion may be damaged in advance of other building floors. There is. Therefore, in the vibration damping building of the present invention, the building characteristics related to the horizontal rigidity in the building having the atrium are positively taken in, and the seismic energy is efficiently absorbed by the amount of inter-story displacement generated in the atrium, resulting in a large damping performance. Is to secure.

In one aspect of the present invention, in the vibration damping building of the present invention, the vibration damping device is further installed in the outer peripheral beam frame of the floor of the building provided with the atrium.
According to such a configuration, in addition to the above-mentioned effects and effects, in a building provided with a stairwell, vibration damping devices are installed inside the building and inside the beam structure on the outer periphery of the building, respectively, to generate seismic energy. By absorbing the above, it is possible to reduce the torsional response due to the seismic load acting from all directions. Further, by installing a vibration damping device in the column-beam frame surrounding the atrium, it is possible to reduce excessive local stress and stress concentration acting on the atrium in the event of an earthquake.

In one aspect of the present invention, in the vibration damping building of the present invention, the vibration damping devices are arranged in a plurality of rows in the vertical direction on both sides of the upper portion or the lower portion of the brace.
According to such a configuration, in addition to the above-mentioned effects and effects, when a damper or the like is used as the vibration damping device, a relatively small diameter is used without using a vibration damping device having a special outer diameter size. High damping performance can be ensured by installing a plurality of damping devices in the vertical direction on both sides of the upper or lower brace even if the vibration damping device is a market product of a size. Further, since the diameter size of the tubular portion of the vibration damping device of the market product is relatively small, it can be installed within the wall thickness of the column-beam frame, and the degree of freedom in the layout planning of the living room can be secured.

According to the present invention, by installing the vibration damping device in the column-beam frame surrounding the atrium, it is possible to provide a vibration damping building having high vibration damping performance while reducing restrictions on the layout plan of the living room.

It is a vertical sectional view which shows the structure of the vibration damping building of 1st Embodiment of this invention. It is a plan sectional view of the lower floor of a building surrounding the atrium (first embodiment). It is explanatory drawing of the vibration damping device installed in the column beam frame (first embodiment). It is explanatory drawing which shows the joint structure of the column member and the beam member which constitute the column beam frame in which the vibration damping device is installed (the first embodiment). It is a comparison diagram of the maximum response acceleration by the vibration analysis for the vibration damping building of this invention and the conventional vibration damping building which installed the vibration damping device for each floor. It is a comparative figure of the maximum interlayer deformation angle by vibration analysis for the vibration damping building of this invention and the conventional vibration damping building which installed the vibration damping device for each floor. It is a vertical sectional view which shows the structure of the vibration damping building of the 2nd Embodiment of this invention. It is a plan sectional view which shows the structure of the 1st modification of a vibration damping building. It is a vertical cross-sectional view which shows the structure of the 1st modification of the vibration damping building. It is a plan sectional view which shows the structure of the 2nd modification of the vibration damping building. It is a vertical cross-sectional view which shows the structure of the 2nd modification of the vibration damping building. It is a vertical cross-sectional view which shows the structure of the 3rd modification of the vibration damping building. It is explanatory drawing which shows the joint structure of the column member and the beam member which constitute the column beam frame in which the vibration damping device is installed (a modification).

The present invention is a vibration-damping building in which a brace is arranged in a column-beam structure inside a building surrounding a stairwell over a plurality of floors, and a plurality of rows of vibration-damping devices are installed above or below the brace.
As shown in FIGS. 1 and 3, the vibration damping building of the present embodiment includes a brace straddling multiple floors arranged in a column-beam frame in contact with the atrium and a vibration damping device installed above the brace. It is configured (first embodiment, FIGS. 1 to 4). The second embodiment is different from the first embodiment in that vibration damping devices are installed on both sides of the lower end of the V-shaped brace on each floor (FIG. 7). Further, in the first and second modified examples, the atrium is a vibration-damping building having a concave opening on the outside of the building (FIGS. 8 and 9 for the first modified example and FIGS. 10 and 11 for the second modified example). The third modification is a vibration-damping building having a stairwell on the middle floor of the building (Fig. 12).
Hereinafter, a mode for carrying out the vibration damping building according to the present invention will be described with reference to the accompanying drawings.

(First Embodiment)
FIG. 1 shows a vertical cross-sectional view showing the configuration of the vibration damping building according to the first embodiment of the present invention. FIG. 2 shows a plan sectional view of the AA portion of the vibration damping building of FIG. 1 showing the configuration of the lower floor portion provided with the atrium in the vibration damping building of FIG.
As shown in FIG. 1, the vibration damping building 1 is composed of a lower structure portion 10 having a basement floor and an upper structure portion 20.
The lower structure portion 10 is supported on a foundation pile (not shown) constructed in the ground G. The lower structure portion 10 includes a plurality of lower columns 11 made of steel-framed reinforced concrete (SRC), and lower beams 12 erected between the adjacent lower columns 11.
The superstructure portion 20 is supported on the lower structure portion 10. The superstructure portion 20 has a plurality of floors, for example, 9 floors in the vertical direction. The superstructure portion 20 includes a plurality of pillars 21 provided on the lower pillar 11 of the lower structure portion 10, and a beam 22 erected between the pillars 21 adjacent to each other. The column 21 of the superstructure portion 20 is made of, for example, a concrete-filled steel pipe (CFT) structure, and the beam 22 is made of a steel frame structure.

The lower floor (level) 20L (for example, the first to third floors above the ground) of the upper structure portion 20 is a rigid frame structure including columns 21 and beams 22. The upper floor (other floor) 20H (for example, a portion having four or more floors above the ground) of the superstructure portion 20 has a pillar 21, a beam 22, and a brace 36 provided between the pillar 21 and the beam 22. It has a brace structure. Further, the upper floor portion 20H has a higher horizontal rigidity than the lower floor portion 20L. Further, on each floor, a steel beam and a deck plate (both not shown) are installed on the beam 22, and a floor slab is formed.
As shown in FIGS. 1 and 2, the atrium H is provided on the inner side of the building of the lower floor portion 20L constituting the superstructure portion 20 in the present embodiment. The atrium H is formed over a plurality of spans straddling a plurality of pillars 21 and a plurality of floors (the second floor and the third floor above the ground in the example of FIG. 1), and the atrium H has the floor (specifically). The floor slabs on the 2nd and 3rd floors have been removed to form a large space in the vertical direction.

Further, the upper floor portion 20H has a rigid structure in which braces 36 are arranged in the column-beam frame. On the other hand, the lower floor portion 20L has a stairwell portion H extending over a plurality of floors, and has a flexible structure having lower horizontal rigidity than the upper floor portion 20H. As shown in FIG. 2, the lower floor portion 20L includes a stairwell portion H, a plurality of columns 21 surrounding the stairwell portion H, and a column-beam frame 25 in which a plurality of beams 22 are three-dimensionally joined.
Further, as shown in FIG. 1, in at least a part of the column-beam frame in contact with the atrium H, a brace 31 straddling a plurality of floors from the first floor above the ground to the third floor above the ground, and dampers on both sides of the upper part of the brace 31 ( A vibration damping mechanism 30A and an outer peripheral vibration damping mechanism 30B (see FIG. 2) including a vibration damping device) 32 are installed. As shown in FIG. 2, the vibration damping mechanism 30A is installed in the column-beam frame 25 over a plurality of spans surrounding the atrium, while the outer peripheral vibration damping mechanism 30B has a plurality of spans like the vibration damping mechanism 30A. It is installed in the outer pillar beam frame 25B on the outer periphery of the building. Therefore, in the atrium H, a one-span column-beam frame is formed over a plurality of floors, or as shown in FIGS. 1 and 2, a plurality of span-column beam frames are formed over a plurality of floors.

FIG. 3 shows a vibration damping mechanism 30A provided in the column-beam frame 25. The vibration damping mechanism 30A includes a brace 31 straddling a plurality of floors and dampers (vibration damping devices) 32 provided on both sides of the upper portion of the brace 31.
The braces 31 and 31 are provided in an inverted V shape, for example, and extend continuously in the vertical direction over a plurality of floors of the lower floor portion 20L as shown in FIG. Further, each brace 31 is made of a steel frame, and its lower end portion 31a is connected to a column 21 and a beam 22 located below the column-beam frame 25. The upper ends 31b, 31b of these two braces 31, 31 are connected to the block-shaped connecting member 33. The connecting member 33 is installed directly under the beam 22 located on the upper side of the column-beam frame 25, and is placed on the upper surface of the connecting member 33 so as to sandwich the steel plate-shaped slide guide 34 projecting from the lower surface of the beam 22. Brackets are provided at opposite positions. Therefore, the connecting member 33 is restrained from moving in the out-of-plane direction by the slide guide 34.
The dampers 32 are arranged in a plurality of rows, for example, two each in the vertical direction on both sides of the connecting member 33 on the upper portion of the braces 31 and 31. In the column-beam frame 25, the beam 22 located above is provided with a support block 35 extending downward. The damper 32 is composed of, for example, a hydraulic cylinder or the like, and both ends thereof are connected to the connecting members 33 of the braces 31 and 31 and the support block 35. The horizontal relative displacement between the connecting member 33 and the support block 35 acts on the damper 32 as an input displacement amount, and seismic energy is absorbed.

Further, the outer peripheral vibration damping mechanism 30B shown in FIG. 2 is the brace 31, 31 provided in the outer peripheral column beam frame 25B by the columns 21 and the beams 22 constituting the outer peripheral column beam frame 25B, similarly to the vibration damping mechanism 30A. And a damper 32 provided between these braces 31 and 31 and the column-beam frame 25.
In the lower floor 20L, the intermediate floors (for example, the second floor and the third floor) between the vibration damping mechanism 30A provided in the column beam frame surrounding the atrium H and the outer beam beam frame 25B are shown in FIGS. 1 and 2. As shown in the above, an intermediate beam 26 whose end portions are pin-joined is erected. Here, a part of the intermediate beam 26 provided in the lower floor portion 20L is pin-joined to the columns 21 on both sides, so that the stress and deformation generated in the intermediate beam 26 in the middle floor of the lower floor portion 20L are generated. It is characterized in that it suppresses transmission to the beam-column frame 25 provided with the vibration damping mechanism 30A, prevents an increase in the horizontal rigidity of the lower floor portion 20L, and enhances the flexibility (deformation performance) of the lower floor portion 20L.

A diagram showing the joining structure of the intermediate beam to the column is shown in FIG.
As shown in FIG. 4, the intermediate beam 26 pin-joined to the column 21 is supported on the receiving bracket 27 projecting horizontally from the side surface 21s of the column 21.
On the side surface 21s of the column 21, a gusset plate 28 is provided above the receiving bracket 27 so as to project along the axial direction of the intermediate beam 26 and are located in the vertical plane. The gusset plate 28 is formed with elongated holes 41 that are continuous in the axial direction of the intermediate beam 26. The gusset plate 28 is provided with, for example, a stainless steel sheet 43 around the elongated hole 41.
Further, on the side surface 21s of the pillar 21, a positioning member 29 projecting along the axial direction of the intermediate beam 26 is formed above the gusset plate 28.

The intermediate beam 26 has a web 26a located in the vertical plane, and an upper flange 26b and a lower flange 26c provided above and below the web 26a. At the end of the intermediate beam 26, the end 26t of the upper flange 26b protrudes by a predetermined dimension in the axial direction of the intermediate beam 26 from the end 26s of the web 26a and the lower flange 26c.
In such an intermediate beam 26, the end portion 26t of the upper flange 26b is joined to the side surface 21s of the column 21 by welding while the upper flange 26b is supported on the positioning member 29. Further, in the intermediate beam 26, the web 26a is opposed to the gusset plate 28 along the gusset plate 28, and the elongated hole 41 formed in the gusset plate 28 and the through hole (not shown) formed in the web 26a are formed by bolts and nuts 46. Is concluded by.
Here, at a position of the web 26a of the intermediate beam 26 facing the stainless steel sheet 43 of the gusset plate 28, a low friction material 42 such as Teflon (registered trademark) is provided in close contact with the sheet 43. .. As a result, the low friction material 42 and the sheet 43 made of stainless steel, for example, facing the web 26a of the intermediate beam 26 are sandwiched between the web 26a and the gusset plate 28.
Further, between the lower flange 26c of the intermediate beam 26 and the upper surface of the receiving bracket 27, for example, a low friction material 44 made of Teflon (registered trademark) and a sheet 45 made of stainless steel, for example, facing the low friction material 44 are formed. It is sandwiched.
As a result, at the end of the intermediate beam 26, only the upper flange 26b is welded to the side surface 21s of the column 21, and the web 26a and the lower flange 26c can be displaced relative to the column 21 in the axial direction of the intermediate beam 26. , Substantially pin-bonded.

(Verification analysis)
Hereinafter, the results of the verification analysis performed on the appropriate range of the layer rigidity ratio between the floor of the building having the atrium where the vibration damping mechanism is installed and the building floor of the non-atrium will be described. This verification was performed by mass point system vibration analysis using a calculation model simulating a 10-story complex building consisting of the lower floors and the upper floors shown in FIGS. 1 and 2.
Each condition of this verification is as follows.
In the calculation model, a skeleton model consisting of columns, beams, braces, and walls was created for each floor of the building, and load gradual analysis was performed on the skeleton model to calculate the layer rigidity for each floor of the building. In the vibration-damping building model of the present invention, the layer rigidity of the first to third floors is about 500 kN / mm, and the layer rigidity of the fourth to tenth floors is about 3000 kN / mm. Further, in the conventional vibration damping building model, the layer rigidity from the 1st floor to the 10th floor is about 2000 kN / mm, respectively. Therefore, in the calculation model of the present invention, the layer rigidity of the lower floor portion having the atrium portion to which the vibration damping mechanism is added is set to about 25% of the layer rigidity of the conventional vibration damping building model.
In the analysis, the maximum response acceleration and the maximum inter-story deformation for each floor of the building are used for the vibration-damping building model of the present invention and the conventional vibration-damping building model using typical observed seismic waves (ElCentro, NS wave). The horns were compared and examined.

FIG. 5 shows a comparison diagram of the maximum response acceleration for each number of floors of a 10-story building above ground by mass point system vibration analysis of the vibration-damping building model of the present invention and the conventional vibration-damping building model. In the vibration damping building model of the present invention, the acceleration is significantly reduced on all floors as compared with the conventional vibration damping building model in which the vibration damping device is provided on each floor.
FIG. 6 shows a comparison diagram of the maximum interlayer deformation angle for each floor of the building by mass point system vibration analysis between the vibration damping building model of the present invention and the conventional vibration damping building model. The inter-story deformation angle taken on the horizontal axis of FIG. 6 focuses on the horizontal deformation amount generated when the building receives an earthquake load as the relative horizontal deformation amount for each floor of the building, and the relative horizontal deformation amount of the upper and lower floors. It is the value obtained by dividing (interlayer deformation) by the floor height. Further, the maximum interlayer deformation angle is the maximum value obtained by taking the absolute value of the interlayer deformation angle that changes from moment to moment, and is an important index for evaluating the structural safety of the building. Therefore, in reinforced concrete and steel-framed buildings, the main frames such as columns and beams are designed so that the maximum interlayer deformation angle is about 1/100 or less as a limit value that can ensure safety even in the event of a large earthquake. Often.
According to the response results of this verification, in the vibration damping building model of the present invention, the maximum interlayer deformation angle is large in the atrium (1st to 3rd floors) and significantly smaller in the 4th to 10th floors above the atrium. Specifically, the interlayer deformation angle of the lower floor portion 20L was calculated by dividing (relative horizontal deformation of the 1st floor to the 4th floor) by (height of the 1st floor to the 4th floor). In the atrium (1st to 3rd floors), the maximum interlayer deformation angle reaches 1/150 rad, but it is less than 1/133, which is lower than 1/100, which is the conventional index value.
Therefore, in a vibration-damping building having a stairwell, when the layer rigidity ratio of the lower floors is about 25% and the layer rigidity ratio of the upper floors is secured to about 150% as compared with the conventional vibration-damping building, It can be estimated that the maximum interlayer deformation angle can be contained in 1/100 or less.
Therefore, in a vibration-damping building in which a vibration-damping mechanism is added to the atrium, if the layer rigidity of the building floor having the atrium is set to about 25% of that of the conventional vibration-damping building, the maximum interlayer deformation angle and the maximum response acceleration are set. Was confirmed to be able to be reduced.

Next, the action and effect of the above-mentioned damping building will be described.
According to such a configuration, the atrium H provided in the lower floor 20L is not provided with the floor slabs and beam members of the floor (2nd and 3rd floors), and is very small such as a small earthquake. Even when a large external force is input, inter-story displacement is likely to occur in the column-beam frame 25 and the outer beam-column frame 25B. Therefore, the damper 32 installed on the upper part of the brace 31 is subjected to shear resistance against the inter-story displacement by the brace 31 of the column-beam frame 25, the vibration damping mechanism 30A provided on the outer beam frame 25B, and the outer peripheral vibration damping mechanism 30B. Attenuate with.

According to the vibration-damping building 1 as described above, the vibration-damping building 1 is provided with a damper 32 in the column-beam frame 25 surrounding the atrium H, and the atrium H is formed over a plurality of floors and the damper 32 is formed. Is installed on the upper part of the brace 31 extending to a plurality of floors.
According to such a configuration, the amount of horizontal displacement acting on the damper 32 is the amount of inter-story displacement that occurs in the atrium H that spans multiple floors, which greatly exceeds the amount of inter-story displacement of one floor, and is the amount of inter-story displacement that occurs in a small earthquake. Since seismic energy can be efficiently absorbed from the minute deformation stage, it is possible to realize a building with excellent not only structural safety performance but also environmental vibration performance. The vibration damping structure is a passive vibration damping structure in which a brace 31 extending to a plurality of floors is installed in a column-beam frame 25 surrounding the atrium H, and a damper 32 is installed above the brace 31.
For example, in a building having a stairwell portion H, the horizontal rigidity of the stairwell portion H is relatively smaller than the horizontal rigidity excluding the stairwell portion, and the floor of the building having the stairwell portion H is damaged ahead of other building floors. there is a possibility. Therefore, in the vibration damping building 1 of the present embodiment, the building characteristics related to the horizontal rigidity of the building having the atrium H are positively taken in, and the seismic energy is efficiently absorbed by the interlayer displacement amount generated in the atrium H. It ensures a large damping performance.

Further, the damper 32 is further installed in the outer peripheral beam frame 25B of the floor of the building in which the atrium H is provided.
According to such a configuration, in addition to the above-mentioned effects and effects, in a building provided with a stairwell portion H, dampers 32 are installed inside the building and inside the beam structure on the outer periphery of the building, respectively, to provide seismic energy. By absorbing the above, it is possible to reduce the torsional response due to the seismic load acting from all directions. Further, by installing the damper 32 in the column-beam frame surrounding the atrium H, it is possible to reduce excessive local stress and stress concentration acting on the atrium H when an earthquake occurs.

Further, the dampers 32 are arranged in a plurality of rows in the vertical direction on both sides of the upper portion of the brace 31. According to such a configuration, in addition to the above-mentioned effects and effects, the damper 32 can be used even if the damper 32 is a commercially available product having a relatively small diameter size without using a damper 32 having a special outer diameter size. High damping performance can be ensured by installing a plurality of pieces in the vertical direction on both sides of the upper part of the brace 31. Further, since the damper 32 of the market product has a relatively small diameter of the tubular portion, it can be installed within the wall thickness of the column-beam frame, and the degree of freedom in the layout planning of the living room can be secured.

Further, in the lower floor portion 20L, the intermediate beam 26 is pin-joined to the column 21 as a small beam supporting the floor of the intermediate floor (second floor and third floor) in contact with the atrium H. In addition, the buckling length of the column is shortened by pin-joining the intermediate beam on the middle floor to the long column (1st to 4th floor) arranged in contact with the atrium H, and the long column Buckling resistance can be increased.
In addition, the end of the intermediate beam 26 pin-joined to the column 21 sandwiches the low friction materials 42 and 44 between the receiving bracket 27 and the gusset plate 28 provided on the column 21. As a result, it is possible to suppress noise generated by rubbing the intermediate beam 26 with the receiving bracket 27 and the gusset plate 28 when the intermediate beam 26 pin-joined to the pillar 21 is displaced in the event of an earthquake or the like. ..

(Second Embodiment)
Next, a second embodiment of the vibration damping device according to the present invention will be described. In the following description, the description will be centered on a configuration different from the first embodiment, and the configurations common to the first embodiment will be described with the same reference numerals as those of the first embodiment in the drawings. Omit.
FIG. 7 shows a vertical sectional view showing the configuration of the vibration damping building according to the second embodiment of the present invention.
As shown in FIG. 7, the vibration damping building 1 in the present embodiment has a plurality of vibration damping buildings 1 in the lower floor portion 20L provided with the atrium portion H in the column-beam frame surrounding the atrium portion H over a plurality of floors in the vertical direction. The vibration damping mechanism 30C is continuously provided. In this case, each vibration damping mechanism 30C is configured by providing braces 31, 31 and dampers 32 inside the column-beam frame 25C formed by columns 21, 21 and beams 22, 22 on each floor.
Even in such a configuration, as in the first embodiment, by providing the column-beam frame 25C surrounding the atrium H with the vibration damping mechanism 30C over a plurality of floors in the vertical direction, the inter-story displacement generated in the column-beam frame 25C can be prevented. It can be suppressed. This makes it possible to provide a vibration damping building 1 having a stairwell portion H, which has high vibration damping properties.
In the present embodiment, vibration damping devices are installed on both sides of the lower end of the V-shaped brace on each floor, but the V-shaped brace is installed on both sides of the lower end and the vibration damping devices are installed on both sides of the lower end. You may.

(First modification of the embodiment)
The vibration damping building of the present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
First, the atrium H may be provided at any place in the vibration damping building 1 in a plan view.
FIG. 8 shows a plan sectional view showing the configuration of the first modification of the vibration damping building according to the embodiment of the present invention. FIG. 9 shows a vertical sectional view showing the configuration of a first modification of the vibration damping building according to the embodiment of the present invention.
As shown in FIGS. 8 and 9, the atrium H may be provided so as to open to the outer surface 1s facing the outside of the vibration damping building 1. In this case as well, the column-beam frame 25 located on three sides of the atrium H, excluding the portion that opens toward the outside of the vibration damping building 1, is provided with the same vibration damping mechanism 30A as in the first embodiment. In this case as well, as in the first embodiment, the outer peripheral vibration damping mechanism 30B may be provided on the outer peripheral column beam frame 25B located outside the atrium H, for example, on the outer surface 1s of the vibration damping building 1.

(Second variant of the embodiment)
FIG. 10 shows a plan sectional view showing the configuration of a second modification of the vibration damping building according to the embodiment of the present invention. FIG. 11 shows a vertical sectional view showing the configuration of a second modification of the vibration damping building according to the embodiment of the present invention. As shown in FIGS. 10 and 11, when a plurality of atriums H and H opening toward the plurality of outer surfaces 1s and 1t of the vibration damping building 1 are provided, at least a part surrounding the atrium H is provided. The vibration damping mechanism 30A may be provided in the column-beam frame 25 located.

(Third variant of the embodiment)
FIG. 12 shows a vertical sectional view showing the configuration of a third modification of the vibration damping building according to the embodiment of the present invention. As shown in FIG. 12, not only in the lower floor 20L of the vibration damping building 1, but also in the case where the middle floor (floor) 20M of the vibration damping building 1 is provided with the atrium H, the columns and beams surrounding the atrium H By providing the frame 25 with the vibration damping mechanism 30A, it is possible to obtain the same effect as that of the above embodiment.

(Other variants)
For example, in the first embodiment, the configuration in which the intermediate beam 26 is pin-joined to the pillar 21 in the lower floor portion 20L is illustrated, but it can be changed to another configuration.
FIG. 13 shows a modified example of the joint structure of the intermediate beam to the column.
For example, as a pin joining type of the beam to the column, as shown in FIG. 13, the lower portion of the end portion of the intermediate beam 26B is cut out, and the end bracket 26e protruding in the axial direction of the intermediate beam 26 is provided only on the upper portion. The end bracket 26e may be provided and placed on the receiving bracket 27 protruding from the side surface 21s of the pillar 21. The end bracket 26e includes an upper flange 26b, a web 26a, and a lower flange 26c, similarly to the end portion of the intermediate beam 26 in the above embodiment.
Further, in the above embodiment, the configuration including the brace 31, 31 and the damper 32 as the vibration damping mechanism 30A, the outer peripheral vibration damping mechanism 30B, and the vibration damping mechanism 30C has been described as an example, but other configurations than the above are provided. May be good. For example, the braces 31 and 31 are provided in an inverted V shape, but as shown in FIG. 7, the braces 31 and 31 may be provided in a V shape and the damper 32 may be provided in the lower part of the column-beam frame 25C. In addition to this, the shape and arrangement of the brace 31 and the damper 32 can be changed as appropriate.
Further, the damper 32 is not limited to the hydraulic cylinder, and may be of another type such as a viscoelastic damper.
Further, the vibration damping mechanisms 30A and 30C are not essential to be provided over the entire circumference of the position facing the atrium H, and may be provided only on a part of the column-beam frame 25 in the circumferential direction. Further, a pin-joined intermediate beam 26 may be provided at a part of the position facing the atrium H.
Further, the outer peripheral vibration damping mechanism 30B is not limited in its installation position and installation direction, and may be appropriately arranged so as to obtain the required vibration damping property when it is not installed or when it is installed.
In addition to this, as long as the gist of the present invention is not deviated, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

1 Vibration control building 25B Outer column beam frame (column beam frame)
20H Upper floor (other floors) 25C Column-beam frame 20L Lower floor (level) 30A Vibration damping mechanism 20M Middle floor (level) 30B Outer circumference vibration damping mechanism 21 Pillars 31 Brace 22 Beams 32 Damper (vibration damping device)
25 Column beam frame H Atrium 26 Intermediate beam

Claims (3)

It is a vibration-damping building with a vibration-damping device installed in the pillar-beam frame surrounding the atrium.
The atrium is formed over multiple floors and is formed over multiple floors.
The vibration damping device is a vibration damping building characterized in that it is installed at an upper part or a lower part of a brace extending to a plurality of floors. The vibration damping building according to claim 1, wherein the vibration damping device is further installed in a building having an outer peripheral column beam frame on the floor of the building provided with the atrium. The vibration damping building according to claim 1 or 2, wherein the vibration damping devices are arranged in a plurality of rows in the vertical direction on both sides of the upper portion or the lower portion of the brace.

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