JP2006226049A - Damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase cross section of a damper to prevent rupture of both ends because large bending stress is generated at both ends when compared with a central part when load acts and both ends may be broken off even if amount of damper deformation is small and reduce cost of the damper. <P>SOLUTION: This damper 1 has a shape like a flat plate, and deformation parts 7a, 7b, 7c, 7d are radially provided in a first joint part 3. The deformation parts 7a, 7b, 7c, 7d are provided with second joint parts 9a, 9b, 9c, 9d. Cross sectional area of the deformation parts 7a, 7b, 7c, 7d is smaller than cross sectional area of the first joint part 3 and the second joint parts 9a, 9b, 9c, 9d, and the deformation parts 7a, 7b, 7c, 7d are formed to have the minimum deformed cross section in the vicinity of central parts. A hole 5 is provided in the vicinity of the center of the first joint part 3, and holes 11a, 11b, 11c, 11d are provided in the vicinity of the center of the second joint parts 9a, 9b, 9c, 9d. When the damper 1 receives load, the deformation parts 7a, 7b, 7c, 7d are elastically and plastically deformed to the outside of face to absorb energy of external force and give damping force in order to control seismic response of a building. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a vibration damper.

Conventionally, struts and wands have been used to increase the earthquake resistance of gate-type structures with columns and beams, but in order to control the structure, dampers are installed on some of these. May be provided.

Examples of the damper include a hydraulic damper using fluid resistance, a friction damper using friction resistance, and an elastic-plastic damper using elastic-plastic deformation of a member. There are elastic-plastic dampers due to axial deformation, in-plane deformation, and out-of-plane deformation, but out-of-plane deformation dampers are widely used because they are inexpensive and easy to install. .

The out-of-plane deformation damper is a damper that absorbs energy by applying a load or deformation in the out-of-plane direction to the plate-like damper, and elastically plastically deforms. For example, as shown in the model diagram shown in FIG. The deformed portion 72 of the damper 71 and the joint portions 73a and 73b provided at both ends thereof receive a load from the A direction.
As such a damper, the following is known (Patent Document 1).
JP 2000-213592 A

However, in such a damper, when a load is applied, since a large bending stress is generated at both ends as compared with the central portion, both ends may be broken even if the amount of deformation of the damper is small.
For this reason, it is necessary to increase the cross section of the damper in order to prevent breakage at both ends, which is costly.

The present invention has been made in view of such problems, and an object thereof is to provide a low-cost damper.

In order to achieve the above-described object, the present invention provides a first joint portion that is joined to a member constituting a building, a deformation portion that is provided in the first joint portion and performs out-of-plane deformation, A second joining portion that is provided in the deforming portion and joined to the member and another member, wherein at least three or more sets of the second joining portion and the deforming portion are provided. It is a damper.
The deformable portion is formed in a variable cross section that has a minimum cross-sectional area in the vicinity of the central portion of the deformable portion.
The first joint is provided in the vicinity of a polygonal centroid formed by connecting the second joints, or in the vicinity of the perpendicular.

In the present invention, the damper includes a plurality of deformable portions, and is formed in a deformed cross section having a minimum cross-sectional area in the vicinity of the central portion of the deformable portion. The stress generated in the deformed portion can be made substantially uniform.

According to the present invention, the cross section of the damper can be reduced, and the cost is improved.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a perspective view showing a damper 1 according to this embodiment, and FIG. 2 is a plan view of the damper 1 shown in FIG. FIG. 3 is a diagram showing the positional relationship between the first joint 3 and the second joints 9a, 9b, 9c, 9d in the damper 1.

As shown in FIGS. 1 and 2, the damper 1 has a flat plate shape, and the first joint portion 3 is provided with deformed portions 7a, 7b, 7c, and 7d in a radial manner.
The deformation portions 7a, 7b, 7c, and 7d are provided with second joint portions 9a, 9b, 9c, and 9d.
The deformed portions 7a, 7b, 7c, and 7d have a smaller cross-sectional area than the first joined portion 3 and the second joined portions 9a, 9b, 9c, and 9d, and in the deformed portions 7a, 7b, 7c, and 7d, The cross-sectional area gradually decreases from the end to the center.

A hole 5 is provided near the center of the first joint 3, and holes 11 a, 11 b, 11 c, and 11 d are provided near the center of the second joints 9 a, 9 b, 9 c, and 9 d. Yes.

It is desirable that the center of the first joint 3 is provided at the polygonal centroid formed by connecting the centers of the second joints 9a, 9b, 9c, and 9d.
Specifically, as shown in FIG. 3, the first joint 3 and the first joint 3 are formed so that the hole 5 is provided in the centroid 15 of the quadrangle 13 formed by connecting the holes 11a, 11b, 11c, and 11d. Two joint portions 9a, 9b, 9c and 9d are arranged.

The material of the damper is preferably a material having a lower yield point than the supporting structure part of the building or the struts, for example, a low yield steel or a metal or alloy such as lead, aluminum or copper having a low yield point. Ordinary steel materials can also be used.

The 1st junction part 3 is fixed to the striation of a building, etc. via a bolt, a joining jig, etc. On the other hand, the second joint portions 9a, 9b, 9c, and 9d are fixed to the support structure portion of the building through bolts, joint jigs, and the like. In addition, the 1st junction part 3 may be fixed to the support structure part of a building, and the 2nd junction part 9a, 9b, 9c, 9d may be fixed to the striation of a building.

When a load due to an external force such as an earthquake acts on the first joint 3, the deformable portions 7 a, 7 b, 7 c, and 7 d absorb the energy of the external force by elastically deforming out of the plane.

Next, the structure of the building structure 21 and the operation of the damper 1 will be specifically described.
FIG. 4 is a view showing the building structure 21, and FIG. 5 is an enlarged view of the damper mounting portion 29a in FIG.

First, the structure of the building structure 21 will be described.
As shown in FIG. 4, the building structure 21 is provided with pillars 23a, 23b, 23c, and 23d that are set up vertically, and the pillars 23a and 23b are connected to each other by beams 25a and 25b. , 23c are connected by beams 25c and 25d. The columns 23c and 23d are connected by beams 25e and 25f, and the columns 23d and 23a are connected by beams 25g and 25h.

A streak 27a is provided at the joint between the column 23a and the beam 25b, and a streak 27b is provided at the joint between the column 23b and the beam 25b.
The streak 27a and the streak 27b are connected to the vicinity of the center of the beam 25a via the damper mounting portion 29a.

Similarly, a streak 27c is provided at the joint between the column 23c and the beam 25f, and a streak 27d is provided at the joint between the column 23d and the beam 25f.
The streak 27c and the streak 27d are connected to the vicinity of the center of the beam 25e via the damper mounting portion 29b.

As shown in FIG. 5, the damper mounting portion 29a is composed of the joining jigs 31a and 31b and the damper 1 provided between the joining jigs 31a and 31b, and the joining jig 31a is joined to the beam 25a and joined. The tool 31b is joined to the strut 27a and the strut 27b.
Since the structure of the damper mounting part 29b is the same as the structure of the damper mounting part 29a, description thereof is omitted.

Next, the structure in the vicinity of the damper 1 in the damper mounting portion 29a will be described in detail.
6 is an enlarged view of the vicinity of the damper 1 in FIG. 5, and FIG. 7 is a view in the direction of arrow B in FIG. In FIG. 7, the joining jig is drawn with a dotted line.
6 and 7, the holes 11a, 11b, 11c, 11d of the damper 1 are provided with bolts 37a, 37b, 37c, 37d and washers 39a, 39b, 39c, 39d, and the bolts 37a, One end of 37b, 37c, 37d is connected to the support portions 35a, 35b, 35c, 35d.
The support portions 35a, 35b, 35c, and 35d are fixed to the joining jig 31a.

That is, the damper 1 is connected to the joining jig 31a via the support portions 35a, 35b, 35c, and 35d.

On the other hand, a bolt 41 and a washer 43 are provided in the hole 5 of the damper 1, and one end of the bolt 41 is connected to the joining jig 31b.
A washer 45 and a cylindrical spacer 47 are provided around the bolt 41.
That is, the damper 1 is connected to the joining jig 31 b via the spacer 47 and the bolt 41.

Next, the operation of the damper 1 provided in the damper mounting portion 29a will be described with reference to FIG. 6, FIG. 7, and FIG. FIG. 8 is a model diagram of the damper 1.
Moreover, since the operation | movement of the damper 1 provided in the damper mounting part 29b is the same as the operation | movement of the damper 1 provided in the damper mounting part 29a, description is abbreviate | omitted.

When the building structure 21 vibrates due to wind, earthquake, or the like, the damper 1 receives loads in the C direction and D direction of FIG.
When the damper 1 receives a load, the deforming portions 7a, 7b, 7c, 7d are deformed out of plane in the C direction and the D direction in FIG. 6 with the second joint portions 9a, 9b, 9c, 9d as fulcrums. It absorbs energy and applies a damping force to the structure to reduce stress and deformation generated in the structure.

Further, as shown in FIG. 8, since the first joint portion 3 which is a portion that receives a load is disposed at the center of the second joint portions 9a, 9b, 9c, and 9d, the load 49 received by the damper 1 Are evenly distributed to the deforming portions 7a, 7b, 7c, 7d.
Therefore, the load applied to each deformed portion is halved compared to a conventional damper having only two fulcrums, and accordingly, the cross-sectional area of the damper 1 can be reduced and the entire size can be reduced.

In addition, the cross section of the deformable portions 7a, 7b, 7c, 7d is smaller than the first joint portion 3 and the second joint portions 9a, 9b, 9c, 9d, and the cross section is minimized in the vicinity of the central portion thereof. Therefore, the stress generated in the damper 1 can be made substantially uniform, local breakage of the damper 1 can be prevented, and the damper 1 can be downsized.

Thus, according to the first embodiment, the damper 1 has the plurality of deformed portions 7a, 7b, 7c, 7d and the second joint portions 9a, 9b, 9c, 9d, and the deformed portions 7a, 7b. , 7c, 7d are smaller than the first joint portion 3 and the second joint portions 9a, 9b, 9c, 9d, and are formed to have a variable cross section that is minimized in the vicinity of the center portion thereof. The stress of each deformed portion is reduced, and the stress generated in the entire damper 1 can be made substantially uniform. Therefore, the damper 1 can be reduced in size and cost can be reduced.

Next, a second embodiment will be described. FIG. 9 is a plan view showing a damper 51 according to the second embodiment. In addition, the same number is attached | subjected to the element which performs the function similar to the damper 1 which concerns on 1st Embodiment, and description is abbreviate | omitted.

The configuration of the damper 51 according to the second embodiment is the same as that of the damper 1 according to the first embodiment. However, the damper 1 according to the first embodiment includes four deformable portions (deformed portions 7a, 7b, 7c, 7d) and four second joints (second joints 9a, 9b, 9c, 9d), the damper 51 according to the second embodiment has three deformation parts ( Deformation portions 7a, 7b, 7c) and three second joint portions (second joint portions 9a, 9b, 9c).

Thus, the number of the deforming portions and the second joint portions is not limited to four, but may be three, or may be five or more.
However, in any case, it is desirable that the center of the first joint 3 is provided at the polygonal centroid formed by connecting the centers of the second joints.

Thus, according to the second embodiment, the damper 51 has the second joint portions 9a, 9b, 9c and the deformed portions 7a, 7b, 7c, and the deformed portions 7a, 7b, 7c are disconnected. An area is smaller than the 1st junction part 3 and the 2nd junction part 9a, 9b, 9c.
Accordingly, the same effects as those of the first embodiment are obtained.

As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

For example, in the first embodiment, the damper 1 is connected to the support portions 35a, 35b, 35c, and 37d using the bolts 37a, 37b, 37c, and 37d, and is connected to the bonding jig 31b using the bolt 41. However, you may connect using other means, such as welding.

In addition, in each embodiment, the damper is configured by one sheet, but may be configured by stacking a plurality of sheets.

Further, in the first embodiment, the damper 1 is used in a so-called shear link type vibration control device provided between the joining jig 31a and the joining jig 31b. It can be used to deform in the axial direction. It can also be applied to seismic control devices such as studs and walls.

The perspective view which shows the damper 1 Plan view of FIG. The figure which shows the positional relationship of the 1st junction part 3 and the 2nd junction part in the damper 1 The figure which shows the building structure 21 The enlarged view of the damper mounting part 29a in FIG. Enlarged view of the vicinity of damper 1 in FIG. B direction arrow view of FIG. Model diagram of damper 1 Plan view showing the damper 51 Model diagram of damper 71

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ......... Damper 3 ............ 1st junction part 5 ............ Hole 7a ......... Deformation part 9a ......... Second junction part 11a ... Hole 13 ......... Rectangle 15 ......... Centroid 23a …… Column 25a …… Beam 27a …… Strain 29a …… Damper mounting portion 31 ………… Joint jig 35a …… Supporting portion 37a …… Bolt 39a …… Washer 41 ……… Bolt 43 ……… Washer 45 ... Washer 47 ... Spacer 51 ... Damper 71 ... ... Damper

Claims (3)

A first joining portion joined to a member constituting the building;
A plurality of deformation portions provided in the first joint portion in at least three directions and performing out-of-plane deformation;
A plurality of second joint portions provided in the plurality of deformable portions and joined to the member and another member;
The damper characterized by having.   2. The damper according to claim 1, wherein the deformable portion is a deformed cross section having a minimum cross-sectional area in the vicinity of a central portion of the deformable portion.   2. The damper according to claim 1, wherein the first joint portion is provided in the vicinity of a polygonal centroid formed by connecting the second joint portions, or in the vicinity of a vertical line thereof.

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