JP2002030828A - Brace damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple and inexpensive brace damper applicable to a wooden building. SOLUTION: In this brace damper 1 arranged in the shape of a brace to a wooden framework, a steel plate 7 is laminated via a viscoelastic material 6 in one end part of a long size steel material 5 having rigidity for functioning as the brace, and the other end part of the steel material 5 and the steel plate 7 are respectively fixed to a column 2, a stud 4 or a beam 3 for constituting the wooden framework. A material folded up in a bellows shape in the width direction by leaving both end parts of a band plate-like steel plate is adopted as the steel material 5. A fixing plate part 8 fixed in a state of being brought into close contact with the column 2, the stud 4 or the beam 3 is integrally formed in the other end part of the steel material 5 by bending. The center of the steel material 5 and the center of the fixing plate part 8 are made eccentric. The one end part of the steel material 5 and the steel plate 7 are connected by a bolt 10 as a fastener so as to be capable of in-plane relative displacement, and a hole for inserting the fastener is formed as an elongate hole lengthwise in the displacement direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damper suitable for use in a wooden building, and more particularly to a brace damper installed in the form of a brace with respect to a wooden frame.

[0002]

2. Description of the Related Art In order to improve seismic resistance of a building and reduce earthquake damage, it is becoming widespread to incorporate a vibration damper into a building for absorbing and attenuating vibrations caused by an earthquake.

[0003]

The vibration dampers developed and put into practical use so far are mainly intended for large-scale buildings such as high-rise apartment buildings. There is a demand to install a vibration damper in a small-scale wooden building, and development of a simple, small, lightweight and inexpensive vibration control damper applicable to a wooden building is desired.

[0004]

According to the first aspect of the present invention, there is provided a brace damper installed in the form of a brace with respect to a wooden frame, wherein one end of a long steel material having rigidity capable of functioning as a brace is provided. A steel plate is laminated via a viscoelastic material, and the other end of the steel material and the steel plate are fixed to columns or beams constituting a wooden frame, respectively. .

According to a second aspect of the present invention, there is provided the brace damper according to the first aspect of the present invention, wherein the steel material is formed by folding a strip-shaped steel plate into a bellows shape in a width direction except for both ends thereof. .

According to a third aspect of the present invention, there is provided the brace damper according to the first or second aspect of the present invention, wherein the other end of the steel material is provided with a fixing plate portion which is fixed to a column or a beam in close contact with the column. It is formed integrally by bending.

According to a fourth aspect of the present invention, in the brace damper according to the third aspect, the center of the steel material and the center of the fixing plate portion are eccentric.

According to a fifth aspect of the present invention, there is provided the brace damper according to any one of the first to fourth aspects, wherein one end of the steel material and the steel plate are connected by a fastener so as to be relatively displaceable in a plane. A hole for passing the fastener is formed as a long hole long in the displacement direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a state in which a brace damper 1 according to the present embodiment is installed on a wooden frame. In this example, a wooden frame composed of a column 2, a beam 3, and a stud 4 is targeted. The brace dampers 1 are arranged so as to form an X shape as a whole with the studs 4 interposed therebetween.

FIG. 2 shows the configuration of the brace damper 1 of the present embodiment. This brace damper 1 is provided at one end of a long steel material 5 having rigidity that can function as a brace.
It is formed by laminating steel plates 7 via a viscoelastic material 6.

The above-mentioned steel material 5 is formed by folding a strip-shaped steel plate in a bellows shape in the width direction except for both ends thereof, and has a required buckling strength as a brace. One end of the steel material 5 remains flat and the steel plate 7 is laminated therethrough via the viscoelastic material 6 as described above, while the other end is bent to form a fixing plate. A portion 8 is formed, and the fixing plate portion 8 is fixed to the stud 4 or the pillar 2 (in FIG. 2 (a), by a wood screw, a bolt or a nail) in a state in which the fixing plate portion 8 is in close contact with the stud 4 or the center. It has become. By eccentricizing the center of the steel material 5 and the center of the fixing plate portion 8 as shown in FIG. 2B, the brace damper 1 can be installed at a position shifted from the center in the wooden frame. Therefore, even when used together with the original brace mounted in the wooden frame, interference with the brace can be avoided, and it can be accommodated within a normal wall thickness without any problem.

On the other hand, the steel plate 7 has a shape corresponding to the shape of one end of the steel material 5 as shown in FIG. 2 (c). Are laminated in a bonded state through the intermediary. A part of the steel plate 7 is bent to form a fixing plate portion 9, and the fixing plate portion 9 is in close contact with the column 2 or the stud 4 (the side of the column base of the column 2 in FIG. 2A). In this state, it can be fixed with wood screws, bolts, or nails. Reference numeral 10 denotes a bolt as a fastener for fastening the steel plate 7 to the steel material 5 to prevent the steel plate 5 from peeling off in the out-of-plane direction, and at least one of the bolt holes through which the bolt 10 passes is formed by the steel plate 7. It is a loose hole so as not to restrict the relative displacement between the steel material 5 and the in-plane direction.
As shown in FIG. 2B or 2D,
The steel plate 7 can be laminated on any surface of the steel material 5.

Since the connection in the wooden frame is substantially pin-jointed, the wooden frame tends to be easily deformed in the event of an earthquake. In place of or in combination with the above, when the wooden frame is going to deform, an in-plane relative displacement between the steel material 5 and the steel plate 7 tends to occur, and the relative displacement is a viscoelastic material. 6, and the vibration of the wooden frame is promptly attenuated, whereby the excellent damping effect of the brace damper 1 is obtained.

The brace damper 1 is formed by laminating a steel plate 7 with a viscoelastic material 6 sandwiched at one end of a steel material 5, so that the structure is extremely simple and can be manufactured at low cost. Also, installation on a wooden frame can be easily and reliably performed only by fixing the fixing plates 8, 9 with wooden screws or the like, so that it is optimally applied to a small wooden building such as a detached wooden house. It is.

In particular, since the steel material 5 in the brace damper 1 is formed by folding a strip-shaped steel plate in a bellows shape, its thickness is, for example, about 50 mm while ensuring a buckling strength that does not hinder the brace. It can be made thin, so it can be incorporated without difficulty into a wall thickness of about 100 mm in a wooden building, and the center of the steel material 5 and the center of the fixing plate 8 are eccentric, so that it can be used together with ordinary braces. It is something. When the brace damper 1 is made of a steel plate having a thickness of 1.6 to 2.3 mm and has a total length of about 1100 mm, its mass is 4 kg.
It can be light enough, and handling during transport and construction is not troublesome. Of course, since the brace damper 1 is formed by integrally bending the fixing plate portions 8 and 9 by simply bending the other end portion of the steel material 5 and the steel plate 7, sufficient fixing strength can be obtained with a simple shape, and thus the brace damper 1 can be manufactured. Nor is it troublesome at all.

The brace damper 1 of the present invention is not limited to being installed in a combination of four in the form of an X as in the above embodiment, but may be installed as long as it is installed in the form of a brace in a wooden frame. It is free and can be installed not only between the columns 2 and the studs 4 as in the above embodiment, but also between the two columns 2, between the columns 2 and the beams 3, and between the upper and lower beams 3. But it is good. FIG. 3 shows an example in which the steel plate 7 and the fixing plate portion 9 are changed in position and shape, and the steel plate 7 is placed on the end upper surface of the beam 3 in this case. It is established.

Also, the form of the brace damper may be appropriately changed as shown in FIGS. 4 and 5, for example.
A brace damper 11 shown in FIG. 4 is formed by bending one end of a steel material 5, laminating a flat steel plate 12 therethrough via a viscoelastic material 6, and using a loose wood screw 13 (or a loose bolt) serving also as a fastener. And the other end of the steel material 5 is also bent in the same manner and is fixed to the stud 4 as a fixing plate portion 14 by the brace damper 11. The same effect as that of the above-described brace damper 1 can be obtained.

The brace damper 21 shown in FIG.
Is substantially the same as the brace damper 11 shown in FIG. 1, except that both ends of the steel material 5 are folded back and a wooden block 22 is sandwiched in order to secure rigidity there. Alternatively, instead of the wooden block 22, a reinforcing rib made of a steel plate may be attached to the folded portion by welding or the like.

Further, as the steel material 5 as in the above embodiment, a steel plate-shaped steel plate folded in a bellows shape is preferable, but the steel material has a buckling strength that can be used as a brace. In addition, a steel material having an arbitrary cross-sectional shape such as a shaped steel, a steel pipe, a ribbed steel plate, or the like can be adopted as long as it has a size that can be incorporated into a wooden frame without any trouble.

[0020]

According to the first aspect of the present invention, a steel plate is laminated via a viscoelastic material to one end of a long, rigid steel material capable of functioning as a brace. Each of the columns or beams that make up the wooden frame is anchored to the columns or beams, so the viscous resistance of the viscoelastic material suppresses the deformation of the wooden frame and the vibration is quickly attenuated, resulting in excellent vibration control. In addition to the effects obtained, the structure is extremely simple, small, lightweight and inexpensive to manufacture,
Installation on a wooden frame can be performed easily and reliably, and therefore, it is optimally applied to a detached wooden house or the like.

According to the second aspect of the present invention, since the steel material is a strip-shaped steel plate which is folded in a bellows shape in the width direction while leaving both ends thereof, the buckling strength which does not hinder the brace is ensured. The thickness can be made sufficiently thin and can be incorporated without difficulty into the wall thickness of the wooden building.

According to the third aspect of the present invention, since the fixing plate portion is formed integrally by bending the other end of the steel material, sufficient fixing strength can be secured with a simple shape.

According to the fourth aspect of the present invention, since the center of the steel material and the center of the fixing plate portion are eccentric, the brace damper can be installed at a position shifted from the center in the wooden frame. Therefore, when used together with the original brace, it is possible to avoid interference with the brace and to fit the brace within the normal wall thickness.

According to a fifth aspect of the present invention, one end of the steel material and the steel plate are connected by a fastener so as to be relatively displaceable in the plane.
Since the holes for passing the fasteners are formed as long holes in the displacement direction, they can be reliably prevented from peeling out of the plane without restraining the relative displacement between the steel material and the steel plate. .

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of installation of a brace damper according to an embodiment of the present invention on a wooden frame.

FIG. 2 is a diagram showing a configuration example of the brace damper.

FIG. 3 is a diagram illustrating a brace damper according to another embodiment of the present invention and an example of installation thereof.

FIG. 4 is a view showing a brace damper according to still another embodiment of the present invention and an example of its installation.

FIG. 5 is a view showing a brace damper according to another embodiment of the present invention and an example of its installation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brace damper 2 pillar 3 beam 4 stud (column) 5 steel material 6 viscoelastic material 7 steel plate 8 fixing plate part 9 fixing plate part 10 bolt (fastener) 11 brace damper 12 steel plate 13 loose wood screw (fastener) 21 brace damper 22 wooden blocks

Claims (5)

[Claims] A brace damper installed in the form of a brace with respect to a wooden frame, wherein a steel plate is laminated via a viscoelastic material to one end of a rigid long steel material capable of functioning as a brace. A brace damper, wherein the other end of the steel material and the steel plate are fixed to columns or beams forming a wooden frame, respectively. 2. The brace damper according to claim 1, wherein said steel material is a strip-shaped steel plate folded in a bellows shape in a width direction except for both end portions thereof. Damper. 3. The brace damper according to claim 1, wherein a fixing plate portion fixed to a column or a beam in a state of being in close contact with the column or the beam is formed integrally with the other end of the steel material by bending. A brace damper characterized by being made. 4. The brace damper according to claim 3, wherein a center of said steel material and a center of said fixing plate portion are eccentric. 5. The brace damper according to claim 1, wherein one end of said steel material and said steel plate are connected by a fastener so as to be relatively displaceable in a plane, and said fastener is passed therethrough. Brace damper, characterized in that a hole for forming the hole is formed as a long hole in the direction of displacement.