JP3245445U - Vibration damping structure - Google Patents

Abstract

An object of the present invention is to provide a vibration damping structure that is effective against both minute vibrations and large vibrations. [Solution] Two parallel vertical members 1a and 1b, two parallel horizontal members 2 and 3 joined to the upper and lower ends of the two vertical members, and a first member fixed to one of the vertical members. A vibration damper 4, a second vibration damper 5 fixed to the other vertical member, a first upper brace 6a that extends from the first vibration damper to the upper side of the other vertical member, and a first vibration damper 6a that extends from the first vibration damper to the other vertical member. A first lower brace 6b is installed on the lower side of the vertical member of and a second lower bracing 6d hanging on the side, the first vibration damper is a speed dependent damper, and the second vibration damper is a hysteresis damper, a vibration damping structure. [Selection diagram] Figure 1

Description

The present invention relates to a vibration damping structure in a wooden house.

As a vibration damping structure for a detached wooden house, it is generally known that a vibration damper is separately provided in a wall structure consisting of columns and braces.
As vibration dampers, dampers described in Patent Document 1 and Patent Document 2 are known, for example.
Patent Document 1 describes a steel damper that performs vibration damping using a plurality of vibration absorbing fins arranged in parallel in the height direction.
Further, Patent Document 2 describes a viscoelastic damper that damps vibrations using a viscoelastic body.
The conventional damping structure uses one of the dampers.

Japanese Patent Application Publication No. 2010-121348 Utility model registration No. 3204250

Steel dampers are hysteretic dampers, and while they can cope with large shaking, they do not exhibit their damping function unless the displacement exceeds a certain level, so they are ineffective against minute shaking.
On the other hand, a viscoelastic damper is a speed-dependent damper, and while it exhibits a damping function even with small vibrations, it cannot cope with large vibrations.
Conventional damping structures only use one type of damper, so they are only effective against small or large vibrations.

The purpose of the present invention is to provide a vibration damping structure that is effective against both small and large vibrations.

The vibration damping structure of the present application, which was made to achieve the above object, consists of two parallel vertical members, two parallel horizontal members joined to the upper and lower ends of the two vertical members, and one vertical member. a first vibration damper fixed to the material, a second vibration damper fixed to the other vertical member, a first upper brace suspended from the first vibration damper to the upper side of the other vertical member, and a first vibration damper. The first lower brace extends from the damper to the lower side of the other vertical member, the second upper brace extends from the second vibration damper to the upper side of one column, and the second vibration damper extends to the lower side of one column. The first vibration damper is a speed-dependent damper, and the second vibration damper is a history damper.
The first vibration damper may be a viscoelastic damper or an oil damper.
The second vibration damper may be a steel damper or a friction damper.
When a rectangular opening constituted by two vertical members and two horizontal members is taken as the front or back side, the first vibration damper and the second vibration damper are arranged at least on the front side or the back side. Either of them may have a brace attachment part.

The vibration damping structure of the present invention is constructed by combining a speed-dependent damper and a hysteresis damper, so it can damp vibrations ranging from minute daily vibrations to large vibrations during a major earthquake.
Furthermore, since the braces are attached to the front side or the back side of both the first vibration damper and the second vibration damper, the length of the braces is uniform, and there is no risk of mixing up the braces when installing them.

Front view of the vibration damping structure of the present invention Perspective view of the first vibration damper Perspective view of the second vibration damper

The present invention will be described in detail with reference to the drawings. Note that the front and back sides in this description are based on an opening formed by two pillars and two horizontal members.

[Example 1]
<1> Overview of vibration damping structure The vibration damping structure of the present invention consists of a framework consisting of two parallel columns 1a and 1b, beams 2 and foundations 3, which are horizontal members above and below the columns 1a and 1b. A vibration damper is attached to the frame of the construction method to provide a vibration damping function.
The frame in this embodiment includes a vertical frame 1c along columns 1a and 1b, and a lower frame 3b on a floor plywood 3a.
A first vibration damper 4 is fixed to the inner surface at the center in the height direction of the vertical frame 1c on the side of one column 1a, and a second vibration damper 4 is fixed on the inner surface at the center in the height direction of the vertical frame 1c on the side of the other column 1b. Fix the vibration damper 5.
In addition, a first upper brace 6a that extends from the first vibration damper 4 to the upper side of the other column 1b, a first lower brace 6b that extends from the first vibration damper 4 to the lower side of the other column 1b, and a second A second upper brace 6c extending from the vibration damper 5 to the upper side of one column 1a, and a second lower brace 6d extending from the second vibration damper 5 to the lower side of the other column 1a are provided.
Each brace 6a, 6b, 6a, 6d is fixed to the vertical frame 1c via a brace 7. However, it may be fixed to the columns 1a and 1b and the beam 2 or the lower frame 3b at the same time.
In this embodiment, the first vibration damper 4, the second vibration damper 5, and the braces 6a, 6b, 6a, and 6d are fixed to the vertical frame 1c, but if the vertical frame 1c is not provided, , may be directly fixed to the pillars 1a and 1b.

<2> Vibration damper The first vibration damper 4 and the second vibration damper 5 used in the vibration damping structure of the present invention are one of which is a speed dependent damper and the other is a history damper.
In this embodiment, the first vibration damper 4 is a viscoelastic damper that is a speed-dependent damper, and the second vibration damper 5 is a steel damper that is a hysteresis damper. Good to have. Further, an oil damper may be used as the speed-dependent damper, and a friction damper may be used as the hysteresis damper.

<2.1> First vibration damper The first vibration damper 4 includes a base plate 41 that is connected to the vertical frame 1c, and a brace mounting member 42 that is connected to the first upper brace 6a and the first lower brace 6b. , and a viscoelastic body 43 that adheres the base plate 41 and the bracing attachment member 42.

<2.1.1> Base Plate The base plate 41 is a steel plate with an L-shaped cross section.
The base plate 41 is fixed with screws or the like with the outside of one plane forming one side of the L-shape in contact with the vertical frame 1c. It can be easily installed because it is fixed with screws etc. while the flat surfaces are in contact.
Then, the brace attachment member 42 is adhered to the inside of the other plane via the viscoelastic body 43.

<2.1.2> Bracing attachment member The bracing attachment member 42 is a flat plate made of steel.
When the brace attachment member 42 is bonded to the base plate 41, the long side surface opposite to the vertical frame 1c protrudes from the base plate 41. Further, a space is provided between the side surface of the brace receiving member 42 and the base plate 41.
The first upper brace 6a and the first lower brace 6b are fixed to the portion of the brace mounting member 42 protruding from the base plate 41 with screws 44 or the like. At this time, the first upper brace 6a and the first lower brace 6b may be in contact with each other or may be separated from each other.
The brace receiving member 42 is a flat plate, and is fixed with screws 44 or the like while the flat surfaces of the braces 6a and 6b are in contact with each other, so that it can be easily attached.

<2.1.3> Viscoelastic body The viscoelastic body 43 is made of high damping rubber, acrylic rubber, or the like.
The viscoelastic body 43 has one surface adhered to the base plate 41 and the other surface adhered to the brace attachment member 42, thereby integrating the base plate 41 and the brace attachment member 42.
By bonding the base plate 41 and the bracing attachment member 42 to both sides of the viscoelastic body 43, the viscoelastic body 43 deforms in accordance with the relative displacement of the base plate 41 and the bracing attachment member 42, and damps vibrations. .

<2.2> Second vibration damper The second vibration damper 5 includes a base plate 51 connected to the vertical frame 1c, and a brace mounting member 52 connected to the second upper brace 6c and the second lower brace 6d. , a plurality of vibration absorbing fins 53 provided in parallel between the base plate 51 and the brace mounting member 52.

<2.2.1>
The base plate 51 is a flat plate made of steel.
The base plate 51 comes into contact with the vertical frame 1c and is fixed with screws or the like. It can be easily installed because it is fixed with screws etc. while the flat surfaces are in contact.
Vibration absorbing fins 53 are fixed to the surface of the base plate 51.

<2.2.2> Bracing attachment member The bracing attachment member 52 is a steel plate with an L-shaped cross section.
The brace attachment member 52 fixes the vibration absorbing fin 53 inside a planar fin fixing part 521 forming one side of the L-shape.
Then, the second upper brace 6c and the second lower brace 6d are brought into contact with the outside of the planar brace fixing portion 522 forming the other side of the L-shape, and fixed with screws 54 or the like. At this time, the second upper brace 6c and the second lower brace 6d may be in contact with each other or may be separated from each other. Since the braces 6c and 6d are fixed with the flat surfaces of each brace in contact with each other using screws 54 or the like, it can be easily attached.

<2.2.3> Vibration Absorption Fin The vibration absorption fin 53 is a steel plate with a U-shaped cross section.
The vibration absorbing fin 53 includes a fixed part 531 whose both ends are bent in parallel, and a deformed part 532 that connects the fixed part 531.
The vibration-absorbing fin 53 has a deformable portion 532 that gradually becomes narrower from the fixed portion 531 to the center so that the deformation of the deformable portion 532 due to vibration is symmetrical with respect to the center of the deformable portion 532. Configure so that the area is small.
One fixing part 531 of the vibration absorbing fin 53 is fixed to the surface of the base plate 51, and the other fixing part 531 is fixed to the inner surface of the fin fixing part 521 by welding or the like.
Further, the second vibration damper 5 is provided with a scale member 55 for visually observing the amount of displacement.
The scale member 55 has both ends fixed to the inside of the base plate 51 and the fin fixing portion 521 of the brace attachment member 52.

<3> Vibration damping function When force is applied to a wooden house due to an earthquake, the columns 1a and 1b tilt. Then, the columns 1a, 1b and the respective braces 6a to 6d are displaced, and the base plates 41, 51 of the first vibration damper 4 and the second vibration damper 5 and the brace mounting members 42, 52 are displaced accordingly. be relatively displaced.
Since each of the braces 6a to 6d is fixed to the brace attachment members 42 and 52, each of the braces 6a to 6d and the brace attachment members 42 and 52 are arranged in the vertical direction with respect to the columns 1a and 1b and the base plates 41 and 51. Displaced to. In the first vibration damper 4, the viscoelastic body 43 deforms in accordance with this displacement, and a vibration damping function is activated.
Further, in the second vibration damper 5, the vibration absorbing fins 53 are deformed in accordance with this displacement, and a vibration damping function is activated.

The first vibration damper 4 of the vibration damping structure of this embodiment is a viscoelastic damper, and is a speed dependent damper. Further, the second vibration damper 5 is a steel damper and is a hysteresis damper.
By combining a speed-dependent damper and a hysteresis damper, the viscoelastic damper, which is a speed-dependent damper, suppresses small daily vibrations caused by vehicle movement or wind, and the hysteresis damper suppresses large tremors during a large earthquake. Vibration can be damped using a steel damper.

[Other Examples]
In the above-mentioned embodiment, the vibration damper is attached to the frame of the framework construction method, but the first vibration damper 4 and the second vibration damper are installed within the frame of the framework wall construction method. 5 and each brace 6a, 6b, 6c, 6d may be provided.

1a, 1b Column 1c Vertical frame 2 Beam 3 Foundation, 3a Floor plywood, 3b Lower frame 4 First vibration damper, 41 Base plate, 42 Bracing mounting member, 43 Viscoelastic body, 44 Screw 5 Second vibration damper, 51 Base plate, 52 Bracing attachment member, 521 Fin fixing part, 522 Bracing fixing part, 53 Vibration absorbing fin, 531 Fixing part, 532 Deformation part, 54 Screw, 55 Scale member 6a First upper brace, 6b First lower brace Paddle, 6c Second upper brace, 6d Second lower brace 7 Bracing hardware

Claims (4)

Two parallel vertical members,
two parallel horizontal members joined to the upper and lower ends of the two vertical members;
a first vibration damper fixed to one vertical member;
a second vibration damper fixed to the other vertical member;
a first upper brace extending from the first vibration damper to the upper side of the other vertical member;
A first lower brace that extends from the first vibration damper to the lower side of the other vertical member,
A second upper brace that extends from the second vibration damper to the upper side of one vertical member,
Consisting of a second lower brace extending from the second vibration damper to the lower side of one of the vertical members,
The first vibration damper is a speed dependent damper,
the second vibration damper is a hysteresis damper;
Vibration damping structure. The vibration damping structure according to claim 1, wherein the first vibration damper is a viscoelastic damper or an oil damper. The vibration damping structure according to claim 1 or 2, wherein the second vibration damper is a steel damper or a friction damper. When a rectangular opening formed by two vertical members and two horizontal members is taken as the front or back side, the first vibration damper and the second vibration damper are arranged at least on the front side or the back side. The vibration damping structure according to any one of claims 1 to 3, characterized in that it has a brace attachment portion on either side.

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