JPH11324399A - Shearing yield type steel damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the executability by preventing a corner part of a connection part from a shearing yield part to a mounting part from becoming a right-angled shape when the shearing yield part is joined on a support member in the mounting part. SOLUTION: A corner part 10 of a connection part 9 in which a steel damper 6 moves from a shearing yield part 7 to a mounting part 8 is not right-angled, but is like round shape to prevent weakening due to the concentration of stress at the time of machining and prevent cutting of the corner part 10 only due to the concentration of stress in the corner part 10 when earthquake occurs. Next, the damper 6 is joined on a support member by a high strength bolt through a bolt hole 12 while pressing the mounting part 8 by a pressing plate or the mounting part 8 and the connection part 9 are welded on the support member by fillet welding. Then, when a ratio of width to height of the yield part 7 is large, a rib led to the mounting part 8 is attached to both sides of the yield part 7 by fillet welding to prevent bending deformation which is independent of deformation between layers. Consequently, the deformation between layers due to horizontal force of earthquake can be securely transmitted to the shearing yield part and this steel damper can be manufactured inexpensively because its structure is simple and can be easily mounted because its weight is light.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shear yielding type steel damper, and more particularly to a shear yielding type steel damper which is easy to manufacture and inexpensive and can be easily mounted on a structure.

[0002]

2. Description of the Related Art Conventionally, many vibration dampers using steel have been proposed. These damping dampers have been incorporated into studs and beams or used in combination with K-shaped or X-shaped braces, but all of them require a lot of labor and cost to manufacture damper members. I was In addition, brace type and wall type vibration dampers
Due to the increased weight, it was mounted on a structure in the same way as a normal steel frame, but it was rather large.

As an example of application to a stud, as shown in FIG. 8, a construction surface 32 surrounded by pillars 30, 30 and beams 31, 31 is shown.
Studs 3 with high toughness shear panel 33 joined to the lower end
4 is mounted and the middle part 36 of the stud is supported by the brace 35, but it is structurally large and heavy in weight. However, in recent years, where the strengthening of the building's seismic resistance and seismic control characteristics has been strongly demanded, in consideration of the conventional situation, the structure can be made simple and inexpensive, and in addition, the weight is increased so that it can be easily attached to the structure. There was a need for a proposal for a light shear yielding steel damper.

[0004]

SUMMARY OF THE INVENTION The present invention solves the problems of conventional shear yield steel dampers,
An object of the present invention is to provide a shear-yield type steel damper which is simple in structure, can be manufactured at low cost, and is light in weight so as to be easily mounted on a structure.

[0005]

SUMMARY OF THE INVENTION A shear-yield steel damper according to the present invention is a shear-yield steel damper in which a shear-yield portion is joined to a support member by a mounting portion, wherein a joint transitions from the shear-yield portion to the mounting portion. The corners of the parts are not formed at right angles, and the mounting part and the connecting part are joined to the support member by fillet welding, or the mounting part is joined to the support member with a high-strength bolt while holding the mounting part with a holding plate. It is also characterized in that both sides of the shear yielding portion are reinforced with ribs reaching the mounting portion.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view and a side view showing a state in which a shear yielding type steel damper according to the present invention is mounted on a building structure. When the shear-yield type steel damper 1 according to the present invention is disposed in a construction surface surrounded by columns and beams, a relatively rigid bundle is provided between the upper and lower beams, and an interlayer formed by an earthquake load or the like is provided. Attach it between the bundle and the beam to concentrate the deformation. When the stud or the cubic wall is disposed, the lower end portion of the stud or the cubic wall is cut to form a necessary gap, and is mounted between the stud or the cubic wall and the lower beam. The example shown is stud 2
The shear yield type steel damper 1 is mounted between the lower end of the steel beam 3 and the beam 3. The details of the shear yield type steel damper 1 will be described later. The shear yield type steel damper 1
First, it is fixed to the lower end of the stud 2 with a high-strength bolt 4, and then the non-shrinkable grout material 5 is injected into the gap between the lower beam and fixed, and then finally fixed with the high-strength bolt 4. To complete the installation.

[0007] When a bundle material for concentrating interlayer deformation is arranged in the construction surface and a shear-yield-type steel material damper is mounted, it is provided between the lower end of the bundle material and the beam as shown in FIG. However, the present invention is not limited to this, and it can also be provided in a gap formed between the upper end of the bundle and the upper beam or in the middle of the bundle.

A steel damper constituting a shear yielding portion will be described with reference to FIGS. FIG. 2A shows the shape of the steel damper when fillet welding is employed as a means for joining the steel damper to the support member. The steel damper 6 is manufactured by forming a D-shape from a steel plate such as ultra-low yield point steel, SS400 or the like, and at the time of shaping, shifts from the central shear yielding portion 7 to the upper and lower mounting portions 8. Special attention has been paid to the joint 9.

The corners 10 at both ends of the connecting portion 9 are formed to have a so-called radius so as to avoid simply connecting the shear yielding portion 7 to the upper and lower mounting portions 8 at right angles. That is, if the connecting portion 9 is formed in a right angle shape, first, shear stress is concentrated at the time of cutting of the mold, and the corner portion 10 is weakened, which is not preferable. However, although it is necessary to absorb the interlayer deformation in the entire shear yielding portion 7, stress is further concentrated on the weakened corner 10 and there is a high possibility that only the corner 10 is cut and collapsed. Because it becomes. Therefore, in order to avoid the above-mentioned double stress concentration, the corner 10 of the joint 9 is formed in a shape having an R, avoiding a right angle.

FIG. 2B shows the shape of the steel damper 11 when a high-strength bolt is used as a means for joining the steel damper to the support member. Figure 2 shows the basic shape
As in the case of the steel damper shown in FIG.
The upper and lower mounting portions 8 and the corner portions 10 are joined together with a radius, but the only difference is that a bolt hole 12 for joining to a support member described later with a high-strength bolt is formed. is there.

FIG. 3 (a) shows the shape of the steel damper when fillet welding is employed as a means for joining the steel damper to the support member, which is different from the shear yielding portion 7 in FIG. 2 (a). The shape of the steel material damper 13 when it is made into a shape is shown. At the stage of designing to absorb a predetermined seismic force by the interlayer deformation of the shear yielding type steel damper, the shape of the shear yielding portion 14 may be forced to increase the ratio of the height to the width. In this case, a bending deformation irrelevant to the interlayer deformation occurs in the shear yielding portion. Therefore, ribs 15 reaching the mounting portion 8 are arranged on both sides of the shear yielding portion 14 to reinforce the shear yielding portion, and unnecessary shearing yielding is performed. Prevent out-of-plane behavior. The mounting of the ribs 15 is performed by fillet welding 16,
The inside of the rib extends over the shear yielding portion 14 and the mounting portion 8, and the outside carefully works with the mounting portion 8.

FIG. 3B shows the shape of the steel damper 17 when a high-strength bolt is used as a means for joining the steel damper reinforced with ribs to the support member. The basic shape is similar to that of the steel damper 13 shown in FIG.
And the ribs 15 are reinforced by attaching the ribs 15 with fillet welds 16, but the difference is that the bolt holes 12 are formed for joining to the support members with high-strength bolts. .

FIG. 4 shows a shear yield type steel damper 18 in which the steel damper 6 is attached to a support member. The shear yield type steel damper 18 is configured by integrally joining the upper and lower mounting portions 8 of the steel damper 6 with the support member 19 by fillet welds 20 and 21. In the fillet welding, in addition to the fillet weld 20 between the mounting portion 8 of the steel damper 6 and the support member 19 which are performed for the joining of the front surface, the joining portion 9 which shifts from the shear yielding portion 7 to the mounting portion 8 is supported on the back surface. Fillet welding 21 to be joined to the member 19 is performed. The execution of the fillet welding 21 contributes to reliably transmitting the horizontal seismic force applied to the support member 19 to the shear yielding portion 7, and greatly affects the operation of the shear yielding type steel damper. .

FIG. 5 shows a shear yielding type steel damper 22 in which the steel damper 11 is attached to a support member.
The shear yield type steel damper 22 is configured by integrally joining the upper and lower mounting portions 8 of the steel damper 11 with a support member 23 and a high-strength bolt 24. The joining of the mounting portion 8 by the high-strength bolts 24 is performed while holding the mounting portion 8 with the pressing plate 25, and contributes to reliably transmitting the horizontal force applied to the support member 23 to the shear yielding portion 7, It works to effectively operate the shear yield type steel damper.

FIG. 6 shows a steel damper 1 having ribs 15.
Shear yield type steel damper 2 attached to support member 3
6 is shown. The shear yield type steel damper 26 is configured by integrally joining the upper and lower mounting portions 8 of the steel damper 13 with the support member 27 by fillet welds 20 and 21. The fillet welding is performed in the same manner as in the case of FIG.
In addition to the fillet weld 20 with the connecting member 9, the joining portion 9 that shifts from the shear yielding portion 14 to the mounting portion 8 is provided on the back surface of the supporting member 2.
7 is implemented. Fillet welding 2
The first embodiment contributes to reliably transmitting the horizontal seismic force applied to the support member 27 to the shear yielding portion 14, and greatly affects the operation of the shear yielding type steel damper.

FIG. 7 shows a steel damper 1 having a rib 15.
Yield-type steel damper 2 having a support member 7 attached to a support member
8 is shown. The shear yield type steel damper 28 is configured by integrally joining the upper and lower mounting portions 8 of the steel damper 17 with the support member 29 and the high-strength bolt 24. The joining of the mounting portion 8 by the high-strength bolts 24 is performed while the mounting portion 8 is pressed by a pressing plate 25. However, the pressing plate 25 is divided into three at the rib 15 unlike the one in FIG. I have. However, the function as the holding plate is the same as that of FIG. 5, which contributes to reliably transmitting the horizontal force applied to the support member 29 to the shear yielding portion 17 and effectively operates the shear yielding type steel damper. It works on things.

As described above in detail, the shear yield type steel damper according to the present invention exhibits the following features, provides a simple and inexpensive structure, is light in weight and easy to handle. I have. First, since the joining part that transitions from the shear yielding part to the mounting part is not formed in a right angle, it is possible to avoid concentration of shear stress during cutting of the mold and to weaken the corners, and to avoid interlayer weakening in the entire shear yielding part. The deformation is absorbed to prevent only the corners from being cut and collapsed. No. 2
In addition, fillet welding is also performed at the joining part that shifts from the shear yielding part to the mounting part for joining with the support member, and the holding plate is arranged over the entire attaching part and joined with high strength bolts This contributes to reliably transmitting the horizontal seismic force applied to the support member to the shear yielding portion. number 3
If the shape of the shear yielding section has to increase the height to width ratio, ribs are provided on both sides of the shear yielding section to the mounting section to reinforce the shear yielding section, and the shear yielding section In this case, the bending deformation irrelevant to the interlayer deformation is suppressed to prevent unnecessary out-of-plane behavior.

[0018]

The shear yield type steel damper according to the present invention is a shear yield type steel damper in which a shear yield portion is joined to a support member by a mounting portion. The attachment part and the joint part are joined to the support member by fillet welding or the attachment part is joined to the support member with high-strength bolts while holding down the attachment part with a holding plate. Since the deformation can be reliably transmitted to the shear yielding portion, the structure can be made simple and inexpensive, and the weight is light, so that it can be easily mounted on the structure. In addition, since both sides of the shear yielding portion are reinforced with ribs reaching the mounting portion, the shear yielding portion is reinforced and unnecessary out-of-plane behavior is prevented, so that an effect of reliably responding to interlayer deformation can be exerted. .

[Brief description of the drawings]

FIG. 1 is a view showing how a shear yield type steel damper according to the present invention is mounted on a structure.

FIG. 2 is a front view of a steel damper according to the present invention.

FIG. 3 is a diagram of a steel damper reinforced by a rib according to the present invention.

FIG. 4 is a shear yield type steel damper attached to a support member by fillet welding.

FIG. 5 is a shear yield type steel damper attached to a support member with high-strength bolts.

FIG. 6 is a shear yield type steel damper with ribs attached to a support member by fillet welding.

FIG. 7 is a shear yield type steel damper with ribs attached to a support member with high-strength bolts.

FIG. 8 is a conventional high toughness shear panel type steel damper diagram.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Shear yield type steel damper 2 Stud 3 Beam 4 High strength bolt 30 Column 5 Non-shrink grout material 31 Beam 6 Steel damper 32 Construction surface 7 Shear yielding part 33 High toughness shear panel 8 Attachment part 34 Stud 9 Joining part 35 Brace 10 Joining Corner of part 36 Intermediate part of stud 11 Steel damper 12 Bolt hole 13 Steel damper 14 Shear yield part 15 Rib 16 Fillet weld 17 Steel damper 18 Shear yield steel damper 19 Support member 20, 21 Fillet weld 22 Shear yield type Steel Damper 23 Supporting Member 24 High Strength Bolt 25 Holding Plate 26 Shear Yield Type Steel Damper 27 Supporting Member

Continuation of the front page (72) Inventor Yoshido Yabe Shimizu Construction Co., Ltd. 1-3-2 Shibaura, Minato-ku, Tokyo

Claims (4)

[Claims] 1. A shear yielding type steel damper comprising a shear yielding portion joined to a support member by a mounting portion, wherein a corner of a joining portion transitioning from the shear yielding portion to the mounting portion is not formed at a right angle. Yield type steel damper. 2. The shear yield type steel damper according to claim 1, wherein the mounting portion and the connecting portion are joined to the support member by fillet welding. 3. The shear-yield type steel damper according to claim 1, wherein the mounting portion is joined to the supporting member with a high-strength bolt while holding the attaching portion with a holding plate. 4. The shear yielding type steel damper according to claim 1, wherein both sides of the shear yielding portion are reinforced by ribs reaching the mounting portion.