JPH07310456A - Damping structure - Google Patents

Abstract

PURPOSE:To make a good damping so as to be performable without requiring a superfluous space in order to set up a damping device in space between a main structure and an auxiliary structure as well as without making nay excessive lateral force act on a mega-column of the main structure. CONSTITUTION:An auxiliary structure 12A partitioning off a room-living quarter space in a space to be formed in the inner part of a main structure 10 consisting of a main frame is hung down of its upper part by a lifting member 13 extending from a beam 10b of the main structure, while the lower part is housed after its movement to the side is checked by a damping device 14 installed in a gap with the main structure. The auxiliary structure is formed into a multilayer structure in the vertical direction, and another damping device 16 being made up of a steel material and a viscoelastic body are alternately stuck to each other plurally with a bond is interposed between layers of the auxiliary structure. Any shearing deformation in this auxiliary structure is absorbed by this damping device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping structure suitable for damping a high-rise building, particularly a super high-rise building.

[0002]

2. Description of the Related Art Most of the passive damping structures proposed hitherto have been intended to suppress the deformation or response of structures in which shear deformation is predominant. Specifically, it is a vibration damping structure in which a vibration damping device for absorbing the vibration energy of a building is attached to a portion where shear deformation occurs. However, such a mechanism has almost no effect on suppressing vibration of a structure such as a skyscraper in which bending is outstanding. This is because there is almost no interlayer deformation, and the bending deformation of the entire structure occurs due to the accumulation of minute axial deformation of the columns, so even if the vibration damping device is installed on the balance, the vibration damping device hardly deforms and the energy absorption Because it is hardly done.

For this reason, in a structure in which such bending deformation is predominant, as represented by TMD (Tuned Mass Damper), the horizontal displacement caused by bending deformation is amplified by a secondary system. Shaking was taken. However, the TMD, which is a vibration damping device in which only a small additional mass is added to the structure, has the following problems. That is, there is a limit to the stroke of the vibration damping device, and it is not possible to use it for a large earthquake. If you do not carefully tune the cycle of the secondary system, you will not be able to achieve the desired results. This is a problem in that the secondary system is an additive only and it is difficult to use it effectively because the amount of material is halfway. In addition, such a problem becomes more remarkable as the rigidity of the structure increases.

Therefore, a vibration control structure having the following megger sub-mechanism has been developed for vibration control of a structure having excellent bending. As shown in FIG. 4, the vibration damping structure having the megger sub-mechanism has a main structure 1 that resists its own weight and seismic force, and a secondary system for appropriately amplifying the deformation generated in the main structure 1. Constituted by a substructure 2 which plays a role,
The weight of the sub-structure 2 is equal to or larger than the weight of the main structure 1, and a vibration damping device 3 is provided between the sub-structure 2 and the main structure 1 (Patent Literature 5). -20
73, Japanese Patent Application Laid-Open No. 2-194279). The vibration control structure having such a mega sub mechanism can be effectively used for vibration control during a large earthquake. The displacement between the sub structure 2 and the main structure 1 can be reduced to a practical range. The vibration itself of the sub-structure 2 is also reduced, and the sub-structure 2 that is a secondary system can be effectively used as a living space, which is an advantage.

[0005]

However, even the vibration damping structure having the above-mentioned megger sub-mechanism has the following problems. That is, since it is necessary to make the cycle of each sub-structure 2 longer than the cycle of the main structure 1 which is a larger structure, the method of supporting the sub-structure becomes a problem. In reality, it is considered to hang it from the mega beam of the main frame, but problems such as an excessive mega beam occur, and it is difficult to actually lengthen the cycle of the sub-structure 2. It is difficult to secure sufficient installation space for the vibration damping device. Therefore, the ability of the vibration damping device 3 cannot be fully exerted, and when the ability of the vibration damping device 3 is not sufficiently exerted, the vibration damping effect sharply depends on the cycle of the sub-structure. , Robustness becomes poor. When the vibration damping device 3 connecting the main structure 1 and the sub structure 2 is attached to the mega column of the main structure 1, there is a problem that an excessive lateral force acts on the mega column.

The present invention has been made in view of the above circumstances, and does not require an extra space for installing a vibration damping device between the main structure and the sub-structure, and yet has a mega structure of the main structure. It is an object of the present invention to provide a vibration damping structure capable of performing good vibration damping without exerting an excessive lateral force on a column.

[0007]

According to a first aspect of the present invention, a sub-structure defining a living room / living area space has an upper portion in a space formed inside a main structure including a main frame. The sub structure is suspended by a suspension member extending from the beam of the main structure, and the lower part of the main structure is housed while being restrained from lateral movement by a vibration damping device interposed between the main structure and the sub structure. Has a multilayer structure in the vertical direction, and a vibration damping device is interposed between the layers of the sub-structure.

According to a second aspect of the invention, the vibration damping device interposed between the layers of the sub-structure is constructed by alternately laminating a plurality of layers of plate material and viscoelastic body.

In a third aspect of the present invention, a sub-structure defining a living room / living area space is provided in a space formed inside the main structure including the main frame, and an upper portion of the sub-structure defines a beam of the main structure. Is suspended from a beam above the main structure by being suspended from a beam above the main structure by a vibration damping device having a lower portion suspended from a suspension member extending from the main structure. A vibration damping device is interposed on a diagonal member extending along a diagonal line of the sub-structure supported by the beam and connected to a lower end of the sub-structure or a beam below the main structure. To do.

In a fourth aspect of the invention, a sub-structure defining a living room / living area space is suspended in a space formed inside the main structure consisting of the main frame by a suspending member. The lower part of the sub-structure is housed while being restrained from lateral movement by a vibration damping device, the sub-structure has a multi-layer structure vertically and a vibration damping device is interposed between layers of the sub-structure. A vibration damping device is provided on a diagonal member extending from a beam above the main structure along a diagonal line of the sub structure supported by the beam and connected to a lower end of the sub structure or a beam below the main structure. It is characterized by being interposed.

[0011]

According to the first aspect of the invention, when the vibration control structure is vibrated by an earthquake or wind, the sub structure suspended by the main structure is deformed. Mainly shear deformation. Therefore,
The shearing deformation generated in the sub-structure is absorbed by the vibration damping device interposed between the layers of the sub-structure, thereby absorbing the vibration energy of the building and reducing the shaking.

According to the second aspect of the present invention, the viscoelastic body of the vibration damping device interposed between the layers of the substructure is deformed according to the deformation of the substructure, and the viscoelastic body is deformed. It absorbs vibration energy of the building and reduces shaking.

According to the third aspect of the present invention, relative to the relative displacement in the oblique direction between the beam of the main structure and the lower end of the front sub-structure supported by the beam, the diagonal member connecting the relative displacement is interposed. The mounted damping device acts to suppress the deformation. Therefore, the vibration can be effectively suppressed even in the mode of a longer cycle.

The invention according to claim 4 has the effects of both the inventions of claim 1 and claim 3 described above.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. <First Embodiment> FIGS. 1 and 2 show a schematic structure of a vibration damping structure according to a first embodiment. In the figure, reference numeral 10 is a main structure. The main structure 10 is composed of a main frame having columns 10a and beams 10b designed for long-term and short-term loads. Sub-structures 12A and 12 that define living room / living space in each of the vertically divided spaces formed inside the main structure 10.
B are suspended and supported by a suspending member 13, which is made of a material having a high tensile strength, such as a steel material, which extends downward from the beam 1b of the main structure, and is housed with a clearance from the main structure 10. ing. A vibration damping device 14 is provided between the lower ends of the sub-structures 12A, 12B, ... And in the vicinity of the intersections of the pillars 10a and the beams 10b of the main structure 10, and as a result,
The relative displacement between the sub-structures 12A, 12B, ... And the main structure 10 is suppressed. The vibration damping device 14 converts the vibration energy based on the relative displacement between the main structure 10 and the sub-structures 12A, 12B, ... into thermal energy or the like and absorbs it. A plastic material or a viscous damper made of a viscous fluid or the like is used. The weight of the sub-structures 12A, 12B, ...
It is set to be equal to or larger than the weight of 0.

The interior of each of the sub-structures 12A, 12B, ... Is divided into a plurality of columns, slabs, walls, etc., whereby a living room or living space is formed in a multi-layered structure. A vibration damping device 16, ... Is provided between the layers of the sub-structures 12A, 12B ,. The vibration damping device 16 is
As shown in FIG. 2, the steel plate 16a and the viscoelastic body 16b are alternately laminated in a plurality of layers.
The viscoelastic body 16b is deformed in accordance with the shear deformation generated between the layers 12B, ..., And the vibration energy of these sub-structures 12A, 12B ,.

In the vibration damping structure having the above structure, however, when the vibration damping structure is vibrated by an earthquake or wind, the main structure 10 is predominantly bent and deformed, but the sub-structures 12A and 12B. , ... are hung from the main structure 10 by the suspension members 13 extending from the beams 10b of the main structure 10, and the lower part thereof is laterally moved by the vibration damping device 14 interposed between the main structure 10 and the main structure 10. Since the sub-structures 12A, 12B, ... Are predominantly sheared because they are stored while being restrained from moving. The predominant shear deformation generated in the sub-structures 12A, 12B, ...
It is absorbed by the vibration damping device 16 interposed between the layers. Therefore, not only the sub-structures 12A, 12B, ... but also the vibration energy of the main structure 10 is absorbed, and by extension, the vibration energy of the entire vibration-damping structure can be absorbed to reduce shaking.

FIG. 3 shows a second embodiment of the present invention. This embodiment is characterized in that the beam 10b of the main structure 10 is changed to the beam 10b.
A diagonal member 20 is provided so as to extend along a diagonal line of the sub-structures 12A, 12B, ... Supported by and connected to a lower end of the sub-structure.
This is the point where 1 is inserted. The diagonal member 20 is not provided on one side as shown in the figure, but is provided in an X shape so as to extend from the upper right to the lower left and from the upper left to the lower right in the figure. 21 is interposed. For the diagonal member 20, a brace material having excellent compressive strength, a wire material having excellent tensile strength, or the like is used. Further, the diagonal members 20 may have their intersecting portions fixed to each other, and further, the diagonal member 20 may be fixed to the substructures 12A, 12B in accordance with the vibration mode in which the vibration of the substructures 12A, 12B, ... Is desired to be suppressed. It may be fixed to a part of the intermediate layer of. Further, the lower end of the diagonal member 20 has sub-structures 12A, 12
Although it is attached to the lower ends of B, ..., It is not limited to this and may be connected to a beam below the main structure. As the vibration damping device 21, the same as the vibration damping device 14, for example, an elasto-plastic material such as high damping rubber, a viscous damper configured by using a viscous fluid, or the like is used. Since the other structure is the same as that of the first embodiment described above, the same components as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the second embodiment, the vibration damping device 21 interposed in the diagonal member 20 includes a beam 10b of the main structure 10 and sub-structures 12A, 12B, which are supported by the beam 10b.
It acts so as to suppress the relative displacement in the oblique direction that occurs between the lower end of. Therefore, it is possible to effectively suppress the vibration even in the case of a longer cycle mode.

[0020]

According to the invention described in claim 1, when the vibration control structure is vibrated by an earthquake or wind,
Shear deformation mainly occurs in the sub-structure suspended by the main structure, and this shear deformation is absorbed by the vibration damping device interposed between the layers of the sub-structure, thereby absorbing the vibration energy of the building and shaking. Can be reduced. Further, the vibration damping device provided between the main structure and the sub-structure is provided only between the lower part of the sub-structure and the main structure. In comparison with a structure in which a large number of vibration damping devices are provided, an extra space for arranging a large number of vibration damping devices is not required, and it is possible to prevent an excessive lateral force from acting on the mega column of the main structure.

According to the second aspect of the present invention, the viscoelastic body of the vibration damping device interposed between the layers of the substructure is deformed according to the deformation of the substructure, and the viscoelastic body is deformed. Since the vibration energy of the building is absorbed, the vibration of the vibration control structure can be efficiently reduced.

According to the third aspect of the invention, relative to the relative displacement in the oblique direction between the beam of the main structure and the lower end of the front sub-structure supported by the beam, the diagonal member connecting the relative displacement is interposed. Since the mounted vibration damping device acts so as to suppress the deformation, it is possible to effectively dampen even a longer cycle mode. Further, similarly to the invention described in claim 1, an extra space for arranging a large number of vibration damping devices is not required, and it is possible to prevent an excessive lateral force from acting on the mega column of the main structure.

In the invention described in claim 4, the effects of both the inventions of claim 1 and claim 3 described above are combined, and the vibration can be suppressed more effectively.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a vibration damping device interposed between layers of the sub-structure according to the first embodiment.

FIG. 3 is a schematic configuration diagram of a second embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a conventional damping structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main structure 10a Column 10b Beam 12A, 12B, ... Sub structure 13 Suspending material 14 Damping device 16 Damping device 16a Steel material 16b Viscoelastic body 20 Diagonal material 21 Damping device

Claims (4)

[Claims] 1. A sub-structure defining a living room / living area space in a space formed inside a main structure composed of a main frame,
The upper part thereof is suspended by a suspending member extending from the beam of the main structure, and the lower part of the main structure is accommodated while being restrained from lateral movement by a vibration damping device interposed between the main structure and the main structure. The vibration control device is characterized in that the sub structure has a multilayer structure in the vertical direction, and a vibration damping device is interposed between layers of the sub structure. 2. The vibration damping structure according to claim 1, wherein the vibration damping device interposed between the layers of the sub-structure is constituted by alternately laminating a plurality of layers of plate materials and viscoelastic bodies. A characteristic damping structure. 3. A sub-structure defining a living room / living area space in a space formed inside the main structure consisting of a main frame,
The upper part thereof is suspended by a suspending member extending from the beam of the main structure, and the lower part of the main structure is accommodated while being restrained from lateral movement by a vibration damping device interposed between the main structure and the main structure. A vibration damping device is provided on a diagonal member extending from a beam above the main structure along a diagonal line of the sub structure supported by the beam and connected to a lower end of the sub structure or a beam below the main structure. A vibration control structure characterized by being interposed. 4. A sub-structure defining a living room / living area space in a space formed inside the main structure consisting of a main frame,
The upper part thereof is suspended by a suspending member and the lower part thereof is accommodated while being restrained from lateral movement by a vibration damping device. The sub-structure has a multi-layered structure in the upper and lower parts, and vibration is suppressed between layers of the sub-structure. The device is interposed and extends from a beam above the main structure along a diagonal line of the sub structure supported by the beam and is connected to a lower end of the sub structure or a beam below the main structure. A vibration damping structure characterized in that a vibration damping device is provided on the diagonal member.