JPH06307496A - Dynamic vibration absorber for building - Google Patents

Abstract

PURPOSE:To provide a dynamic vibration absorber which is of simple constitution, and can be easily and inexpensively employed for industrialized dwelling houses for the purpose of controlling horizontal vibration of a building. CONSTITUTION:In a dynamic vibration absorber 10 in which weights 12 are attached to the side faces of a horizontal member 11, a damper (viscous damper 13) is inserted between the intermediate part of the horizontal member 11 and the structural body (ceiling joist 3) of a building.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic vibration absorber for a building for suppressing mainly horizontal vibration (rolling) of the building due to wind, earthquake, and traffic vibration.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 63-76932 discloses a vibration damping device for buildings
Some of them use a dynamic vibration reducer as described in Japanese Patent Publication No. This dynamic vibration reducer is constructed by installing a combination of weight, spring, and resistance elements in a building.

[0003]

However, in the prior art, the spring and the resistance constituting the dynamic vibration reducer are different from each other. Therefore, the structure is complicated, and it cannot be easily and inexpensively adopted for industrialized houses.

It is an object of the present invention to provide a dynamic vibration absorber which has a simple structure, can be easily and inexpensively adopted in industrialized houses, etc., because it can prevent horizontal vibration of a building.

[0005]

According to the present invention as set forth in claim 1, in order to suppress mainly horizontal vibration of a building, a weight is attached to a side surface of a horizontal member, and the horizontal member is horizontally arranged. A dynamic vibration absorber for a building, in which both ends of the horizontal member are fixed to a building structure so as to absorb vibration by horizontal bending vibration of the horizontal member, the intermediate part of the horizontal member and the building structure. A damper is interposed between the body and the body.

According to a second aspect of the present invention, in order to suppress mainly horizontal vibration of a building, the central portions of two vertically oriented horizontal members are joined by a horizontally oriented horizontal member, and the horizontally oriented horizontal member is connected. The weights are attached to the sides of the vertical structure, and both ends of the two horizontal materials are fixed to the building structure so that each horizontal material is placed horizontally. A dynamic vibration absorber for a building that absorbs vibrations in two directions on a horizontal plane by the bending vibration of the horizontal cross member and the bending vibration of the horizontal cross member in the other horizontal direction. A damper is interposed between the structure and the structure.

[0007]

The weight is supported by the horizontal member, the bending rigidity of the horizontal member is used as the spring element, and the internal loss due to the bending vibration of the horizontal member is used as the resistance element. That is, the horizontal member substitutes the two elements of the spring and the resistance, which simplifies the structure. Further, since the damper is provided between the intermediate portion of the horizontal member and the building structure, the vibration of the building can be damped by this damper as well, and the vibration absorbing performance can be further improved.

Therefore, a weight and a horizontal member are formed so that the natural frequency of this dynamic vibration absorber matches the horizontal primary natural frequency of the building, and the horizontal member is fixed to the ceiling structure. Moreover, by providing the damper, it is possible to effectively prevent the horizontal vibration (horizontal vibration) of the building by the dynamic vibration absorbing action.

The weight is supported by a horizontal transverse member, the bending rigidity of the vertical transverse member and the horizontal transverse member is used as a spring element, and the internal loss due to bending vibration of these horizontal members is used as a resistance element. That is, the horizontal member substitutes the two elements of the spring and the resistance, which simplifies the structure. Furthermore, since a damper is interposed between the middle part of the horizontal cross member and the building structure,
This damper can also dampen the vibration of the building and further improve the vibration absorbing performance.

Therefore, the weight and each horizontal member are formed so that the natural frequency of this dynamic vibration absorber matches the horizontal primary natural frequency of the building, and the vertical horizontal member is fixed to the ceiling structure. Then
Moreover, by installing a damper, vibrations (horizontal vibrations) in two horizontal directions of the building can be effectively dampened by the dynamic vibration absorption function.

In the above, the horizontal member is further 2
By using a composite material made by laminating more than one material, the characteristics required for a horizontal material, that is, (a) bending vibration easily occurs in the horizontal direction, and (b) internal loss due to bending And (c) the weight can be safely and reliably supported in the vertical direction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing a first embodiment, and FIG.
A schematic diagram showing an embodiment, FIG. 3 is a schematic diagram showing a third embodiment,
FIG. 4 is a schematic diagram showing the fourth embodiment, FIG. 5 is a schematic diagram showing the fifth embodiment, FIG. 6 is a schematic diagram showing the sixth embodiment, and FIG.
FIG. 8 is a schematic diagram showing an example, and FIG. 8 is a schematic diagram showing an eighth example.

(First Embodiment) (FIG. 1) The dynamic vibration absorber 10 is installed at the back of a second floor shed of a two-story unit building 1 as shown in FIGS. 1 (A), (B) and (C). Is
The vibration (horizontal vibration) of the building 1 mainly in the horizontal direction is suppressed. The dynamic vibration absorber 10 is constructed by attaching weights 12 and 12 to both side surfaces of the horizontal member 11, and the both ends of the horizontal member 11 are arranged so that the horizontal member 11 is horizontally arranged. It is fixed to the ceiling beam 2 of the building 1 and is absorbed by the bending vibration of the horizontal member 11 in the horizontal direction.

Further, the dynamic vibration reducer 10 has a viscous damper 13 interposed between an intermediate portion of the horizontal member 11 and the ceiling joist 3 of the ceiling structure. The viscous damper 13 fixes the silicon oil tank 14 to the upper surface of the ceiling joist 3 and mounts the disk-shaped member 15 suspended and supported from the horizontal member 11 on the silicon oil tank 1.
It is constructed by immersing in the silicone oil in 4.

As described above, the viscous damper 13 has a simple structure and is inexpensive, and is capable of damping fine vibrations.

The operation of this embodiment will be described below.
The weight 12 is supported by the horizontal member 11, the bending rigidity of the horizontal member 11 is used as a spring element, and the internal loss due to bending vibration of the horizontal member 11 is used as a resistance element. That is, the horizontal member 11 substitutes the two elements of the spring and the resistance, and the structure is simplified. Further, since the viscous damper 13 is interposed between the intermediate portion of the horizontal member 11 and the ceiling structure, the vibration of the building 1 can be damped also by this damper 13 and the vibration absorbing performance can be further improved. Therefore, so that the natural frequency of the dynamic vibration absorber 10 matches the horizontal primary natural frequency of the building 1,
By forming the weight 12 and the horizontal member 11, fixing the horizontal member 11 to the ceiling structure, and providing the damper 13,
The horizontal vibration (horizontal vibration) of the building 1 can be effectively isolated by the dynamic vibration absorbing action.

Therefore, since the horizontal vibration of the building 1 is isolated, the structure is simple and can be easily and inexpensively adopted in industrialized houses, etc., and the dynamic vibration absorber 10 having a high vibration absorption performance can be obtained.

(Second Embodiment) (FIG. 2) The dynamic vibration reducer 20 of the second embodiment is the dynamic vibration reducer 10 of the first embodiment.
The only difference is that the oil damper 23 is interposed between the intermediate portion of the horizontal member 11 and the ceiling joist 3 of the ceiling structure. The oil damper 23 is configured by disposing the tip pistons of piston rods 24, 24 that are pin-connected to the horizontal member 11 and the ceiling joist 3, respectively, in an oil chamber inside a cylinder 25.

The oil damper 23 is constructed as described above and can be used as an oil damper for a vehicle such as a commercially available vehicle and is inexpensive.

That is, also in the second embodiment, the basic structure thereof is the same as that of the first embodiment, and the same effects as those in the first embodiment are obtained. In particular, since the oil damper 23 is provided between the intermediate portion of the horizontal member 11 and the ceiling structure, the vibration of the building 1 can also be damped by this damper 23, and the vibration absorbing performance can be further improved.

(Third Embodiment) (FIG. 3) The dynamic vibration reducer 30 of the third embodiment is the dynamic vibration reducer 10 of the first embodiment.
The only difference is that the friction damper 33 is interposed between the intermediate portion of the horizontal member 11 and the ceiling joist 3 of the ceiling structure. The friction damper 33 is configured such that a friction plate 34 such as a plywood is fixed to the upper surface of the ceiling joist 3, and the lower surface of the horizontal member 11 and the lower surface of the weight 12 are brought into frictional contact with the upper surface of the friction plate 34.

The friction damper 33 has a simple structure and is inexpensive as described above, and has a great vibration damping performance.

That is, also in the third embodiment, since the basic structure thereof is the same as that of the first embodiment, the same operational effect as in the first embodiment can be obtained. In particular, since the friction damper 33 is provided between the intermediate portion of the horizontal member 11 and the ceiling structure, the vibration of the building 1 can also be damped by this damper 33, and the vibration absorbing performance can be further improved.

(Fourth Embodiment) (FIG. 4) The dynamic vibration absorber 40 of the fourth embodiment is the dynamic vibration absorber 10 of the first embodiment.
The only difference is that the friction damper 43 is interposed between the intermediate portion of the horizontal member 11 and the ceiling joist 3 of the ceiling structure. The friction damper 43 has a ceiling joist 3
A friction plate 44 such as a plywood plate is fixed to the upper surface of, and the lower surface of the weight 12 is configured to frictionally contact the upper surface of the friction plate 44.

The difference of the fourth embodiment from the third embodiment is that the weight 12 is projected downward from the lower surface of the horizontal member 11 and only the weight 12 is brought into frictional contact with the friction plate 44.

The friction damper 43 has a simple structure and is inexpensive as described above, and has a great vibration damping performance.

That is, also in the fourth embodiment, since the basic structure thereof is the same as that of the first embodiment, the same operation and effect as in the first embodiment can be obtained. In particular, since the friction damper 43 is provided between the intermediate portion of the horizontal member 11 and the ceiling structure, the damper 43 can also dampen the vibration of the building 1 and further improve the vibration absorbing performance.

(Fifth Embodiment) (FIG. 5) The dynamic vibration absorber 50 is installed at the back of the second floor shed of the two-story unit building 1 as shown in FIGS. 5 (A), (B) and (C). Is
The vibration (horizontal vibration) of the building 1 mainly in the horizontal direction is suppressed. Then, the dynamic vibration reducer 50 includes two vertically oriented horizontal members 51.
A and 51A are connected at their central portions with a horizontal cross member 51B, and weights 52 and 52 are attached to both side surfaces of the horizontal cross member 51B, respectively, so that the horizontal cross members 51A and 51B are arranged horizontally. The two vertical cross members 51A, 51A are fixed at both ends to the ceiling beam of the building 1, and the vertical horizontal cross member 51A is subjected to bending vibration in one horizontal direction (x direction) and horizontal cross members. Vibration of the 51B in two directions in the horizontal plane is absorbed by the bending vibration in the other horizontal direction (y direction).

Further, the dynamic vibration reducer 50 is composed of a horizontal cross member 51B.
A viscous damper 53 is interposed between the intermediate part of the above and the ceiling scaffolding plate 4 of the ceiling structure. The viscous damper 53 fixes the silicon oil tank 54 to the upper surface of the ceiling scaffolding plate 4, and immerses the disk-shaped member 55 suspended and supported from the lateral cross member 51B in the silicon oil in the silicon oil tank 54. Is configured.

As described above, the viscous damper 53 has a simple structure and is inexpensive, and is capable of damping fine vibrations well.

The operation of this embodiment will be described below.
The weight 52 is supported by the horizontal horizontal member 51B, and the vertical horizontal member 51B is supported.
The bending rigidity of A and the laterally-extending horizontal member 51B is used as a spring element, and the internal loss due to bending vibration of the horizontal members 51A and 51B is used as a resistance element. That is, the horizontal members 51A and 51B
Replaces the two elements of spring and resistance, which simplifies the configuration. Furthermore, since the viscous damper 53 is interposed between the intermediate portion of the horizontal cross member 51B and the ceiling structure, the vibration of the building 1 can also be damped by this damper 53, and the vibration absorbing performance can be further improved. Therefore, the weight 52 and the horizontal members 51A and 51B are formed so that the natural frequency of the dynamic vibration absorber 50 matches the horizontal primary natural frequency of the building 1, and the vertical horizontal member 51A is used for the ceiling. By fixing to the structure and providing the viscous damper 53, vibration (rolling) of the building 1 in two horizontal directions can be effectively damped by the dynamic vibration absorbing action.

Thus, since the horizontal vibration of the building 1 is isolated, the structure is simple, and it can be easily and inexpensively employed in industrialized houses and the like, and the dynamic vibration absorber 50 having high vibration absorption performance can be obtained.

(Sixth Embodiment) (FIG. 6) The dynamic vibration reducer 60 of the sixth embodiment is the dynamic vibration reducer 50 of the fifth embodiment.
The only difference is that the oil damper 63 is interposed between the intermediate portion of the horizontal cross member 51B and the ceiling scaffolding plate 4 of the ceiling structure. The oil damper 63 is a horizontal cross member 51B.
And the tip pistons of the piston rods 64, 64 pin-connected to the ceiling scaffold plate 4 are arranged in the oil chamber in the cylinder 65.

The oil damper 63 is constructed as described above, and a commercially available vehicle oil damper such as for an automobile can be used and is inexpensive.

That is, also in the sixth embodiment, the basic construction thereof is the same as that of the fifth embodiment, and the same effects as those in the fifth embodiment are obtained. In particular, since the oil damper 63 is interposed between the intermediate portion of the horizontal cross member 51B and the ceiling structure, the vibration of the building 1 can also be damped by this damper 63, and the vibration absorbing performance can be further improved.

(Seventh Embodiment) (FIG. 7) The dynamic vibration reducer 70 of the seventh embodiment is the dynamic vibration reducer 50 of the fifth embodiment.
The only difference is that the friction damper 73 is interposed between the intermediate portion of the horizontal cross members 51B and the ceiling scaffolding plate 4 of the ceiling structure. The friction damper 73 fixes the brush member 74 to the lower surface of the horizontal cross member 51B, and
It is configured to bring the tip end portion 5 into frictional contact with the upper surface of the ceiling scaffold plate 4. As shown in FIG. 7C or 7D, the brush implement 74 is configured by implanting the brush 75 on the wooden board 76.

That is, also in the seventh embodiment, since the basic structure thereof is the same as that of the fifth embodiment, the same operational effect as in the fifth embodiment can be obtained. In particular, the horizontal cross member 51
A friction damper 7 is provided between the middle part of B and the ceiling structure.
Since 3 is interposed, the damper 73 can also dampen the vibration of the building 1 and the vibration absorbing performance can be further improved.

(Eighth Embodiment) (FIG. 8) The dynamic vibration absorber 80 of the eighth embodiment is the dynamic vibration absorber 10 of the first embodiment.
The difference is that the horizontal member 81 is composed of a composite material in which adherends 81B and 81B are adhered and laminated on both sides of a core member 81A. As the core material 81A, wood, damping rubber material, or asphalt damping material can be adopted. Substrate 81
As B, an iron plate can be adopted.

According to the horizontal member 81, the characteristics required for the horizontal member 81 are as follows: (a) bending vibration is easily generated in the horizontal direction, (b) internal loss due to bending is large, and (c) It is possible to more reliably achieve that the weight 12 can be supported safely and reliably in the vertical direction.

The composite cross member as in the eighth embodiment can also be used in the second to seventh embodiments.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific structure of the present invention is not limited to this embodiment, and changes in design within the scope not departing from the gist of the present invention can be made. Even if it exists, it is included in the present invention. That is, in the present invention, it is optimal to provide the dynamic vibration reducer on the ceiling structure on the top floor. However, the dynamic vibration absorber may be provided in any or all of the ceiling structures on each floor.

[0042]

As described above, according to the present invention, since the horizontal vibration of the building is isolated, a dynamic vibration absorber having a simple structure, which can be easily and inexpensively adopted in industrialized houses and the like, and which has a high vibration absorbing performance is obtained. Can be provided.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a first embodiment.

FIG. 2 is a schematic diagram showing a second embodiment.

FIG. 3 is a schematic diagram showing a third embodiment.

FIG. 4 is a schematic diagram showing a fourth embodiment.

FIG. 5 is a schematic diagram showing a fifth embodiment.

FIG. 6 is a schematic diagram showing a sixth embodiment.

FIG. 7 is a schematic diagram showing a seventh embodiment.

FIG. 8 is a schematic view showing an eighth embodiment.

[Explanation of symbols]

 1 Building 2 Ceiling Beam (Building Structure) 3 Ceiling joist (Building Structure) 4 Ceiling Scaffolding (Building Structure) 10 Dynamic Vibration Absorber 11 Horizontal Material 12 Weight 13 Viscous Damper 20 Dynamic Vibration Absorber 23 Oil Damper 30 Dynamic Vibration Absorption Device 33 Friction damper 40 Dynamic vibration absorber 43 Friction damper 50 Dynamic vibration absorber 51A Vertical horizontal material 51B Horizontal horizontal material 52 Weight 53 Viscous damper 60 Dynamic vibration absorber 63 Oil damper 70 Dynamic vibration absorber 73 Friction damper 80 Dynamic vibration absorber 81 Horizontal material

Claims (2)

[Claims] 1. In order to suppress mainly horizontal vibration of a building, a weight is attached to a side surface of a horizontal member, and both ends of the horizontal member are arranged so that the horizontal member is horizontally arranged. A dynamic vibration absorber for a building, which is fixed to a horizontal bridge and absorbs vibration by horizontal bending vibration of the horizontal bridge, wherein a damper is interposed between an intermediate portion of the horizontal bridge and the building structure. Characteristic dynamic vibration absorber for buildings. 2. In order to suppress vibration mainly in a horizontal direction of the building, the central portions of the two vertical horizontal members are joined by the horizontal horizontal members, and a weight is attached to the side surface of the horizontal horizontal members. , Both ends of the two vertical horizontal members are fixed to the building structure so that each horizontal horizontal member is placed horizontally, and the bending vibration in one horizontal direction of the horizontal horizontal members and the horizontal horizontal members are fixed. Is a dynamic vibration absorber for buildings that absorbs vibrations in two directions in the horizontal plane due to bending vibrations in the other horizontal direction, and a damper is provided between the middle portion of the horizontal cross members and the building structure. A dynamic vibration absorber for buildings characterized by being interposed.