JP2003193699A - Elasto-plastic, visco-elastic brace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elasto-plastic, visco-elastic brace of a low cost which can reduce response of a structure effectively for both seismic load and wind load. <P>SOLUTION: A buckling constraint material 2 is arranged around the section of a core material 1 constituting brace. The core material 1 does not buckle, but makes elasto-plastic deformation for external force, and functions as an elasto-plastic damper. A longitudinal rib 3 extending in axial direction is established in an end of the core material 1, and gets into a slit 4 of an end of the buckling constraint material 2. Between this longitudinal rib 3 and a connecting member 8 for visco-elastic damper provided on the buckling restriction member 2, the visco-elastic damper 6 made of lamination of a visco-elastic material 7 and the connecting member 8 is attached. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastoplastic / viscoelastic brace in which an elastoplastic damper and a viscoelastic damper are integrated for the purpose of reducing the response of a structure to an earthquake load and a wind load.

[0002]

[Prior Art] When an effect is to be exerted against both earthquake load and wind load, conventionally, an elasto-plastic damper using steel material, lead, etc. and a viscoelastic damper are used together or a viscoelastic damper is used alone. Either.

The viscoelastic damper exerts a damping effect in any amplitude range, but when used alone, it is problematic in that the manufacturing cost is higher than that of a steel-based elastic-plastic damper.

Further, Japanese Patent Laid-Open No. 2001-173265 discloses that an elasto-plastic damper 17 and a viscoelastic damper 18 are arranged on a structure surrounded by columns 19 and beams 20 of a building, as shown in FIG. However, in order to arrange two types of dampers on the construction surface, at least two installation locations are required, and there is a problem that it is difficult to open an opening such as a window.

With respect to such a problem, Japanese Patent Laid-Open No. 11-
Japanese Patent No. 153194 discloses a vibration damping member in which an elasto-plastic damper and a viscoelastic damper are integrated.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the vibration damping member described in Japanese Patent No. 3194, a damping material is arranged around a steel central axial force member, the outside of the damping material is covered with a buckling restraint material made of steel, and the damping material and the buckling material are further provided on the outside. The buckling restraint member is arranged with a restraint member, and one end of each buckling restraint member is alternately joined to one of both ends of the steel central axial force member.

In the vibration damping member, the damping material arranged between the steel central axial force member and the buckling restraint material is a high damping rubber,
Polymer, silicone, oil, etc. are used, but all of these materials have significantly lower compression rigidity than steel materials, so
From the viewpoint of buckling restraint, a gap corresponding to the thickness of the damping member is left between the steel central axial force member and the buckling restraint member.

Therefore, there is a problem in that the buckling restraint effect is not exhibited until the steel central axial force member buckles and contacts the buckling restraint member, and the performance of the elasto-plastic damper is not sufficiently exhibited.

The present invention solves the problems in the prior art as described above, and is capable of effectively reducing the response of a structure to both earthquake load and wind load, and is a low-cost elasto-plastic material. It is intended to provide a viscoelastic brace.

[0010]

An elastic-plastic viscoelastic brace according to claim 1 of the present application comprises a core material constituting the brace,
A buckling restraint member provided around the cross section of the core member for restraining deformation of the core member in a direction intersecting with the axial direction, and both axial end portions of the core member project from the end portions of the buckling restraint member. The buckling restraint brace is characterized in that a viscoelastic damper is provided between an end portion of the core material and the buckling restraint material.

According to the present invention, by combining a buckling restraint brace which is one of elasto-plastic dampers with a viscoelastic damper, two types of performance are incorporated in one brace, and it is effective for both wind load and seismic load. It was made to be able to.
Regarding the viscoelastic damper, it is usually preferable to incorporate a plurality of viscoelastic dampers in view of the balance (symmetry) of the device.

As the buckling restraint brace, for example, Japanese Patent Laid-Open No. 2000-265706 and Japanese Patent Laid-Open No. 2001-2.
There is a buckling restraint brace made of steel described in Japanese Patent No. 14541, and a buckling restraint made of steel is provided around the cross section of a core material made of a steel plate or the like, and the core material is elastically plastically deformed without buckling. Thus, it is possible to effectively suppress the response of the structure due to an earthquake load or the like. In the present invention, by using such a buckling restraint brace, etc. of which performance has been established, by incorporating a viscoelastic damper without changing the overall shape as much as possible, it is possible to compactly attach it to the building surface or the like. .

That is, if a viscoelastic damper is attached along the longitudinal direction to a buckling restraint brace that originally has a rod-like overall shape, the rod-like overall shape is maintained as one device while maintaining the elastoplastic / viscoelasticity. It can be made to function as a damper, and is described in Japanese Patent Application Laid-Open No. 200
As in the invention described in JP-A-1-173265, it is not necessary to dispose an elasto-plastic damper and a viscoelastic damper on the surface of a building, and the degree of freedom in providing openings such as windows is improved.

The buckling restraint brace as the elasto-plastic damper is preferably made mainly of steel, but if another metal is used or if it exhibits an elasto-plastic damper function, the core material or the buckling restraint brace is used. It is also possible to construct one or both of the materials with a material other than metal.

Further, the viscoelastic damper is provided between the end portion of the core material and the buckling restraint material only when the viscoelastic damper is directly attached to the core material main body portion of the buckling restraint material. Alternatively, when ribs, stiffeners, other various members for joining, metal fittings, etc. attached to the end portion of the core material are attached to the end portion of the main body of the core material, they may be attached via them.

As the viscoelastic damper, various conventionally known viscoelastic dampers can be used. Examples of compact shapes include high damping rubber, acrylic polymer, rubber asphalt, silicone rubber and the like. For example, an elastic body is sandwiched between steel plates and other plate-shaped bodies.

An elasto-plastic / viscoelastic brace according to claim 2 of the present application comprises a core material which constitutes the brace, and a seat which is provided around the cross section of the core material and which restrains deformation of the core material in a direction intersecting the axial direction. A buckling restraint brace made of a buckling restraint material, wherein both axial ends of the core material project from the end portions of the buckling restraint material, and viscoelastic dampers are provided between both end portions of the core material. It is characterized by that.

In the invention according to claim 1, the viscoelastic damper is provided between the end portion of the core material and the buckling restraint material, whereas in the invention according to claim 2, it projects from the end portion of the buckling restraint material. It is provided between both ends of the core material. In the former case, the viscoelastic damper becomes smaller, whereas in the latter case, the viscoelastic damper or its mounting mechanism extends over almost the entire length of the elastoplastic / viscoelastic brace, but the deformation that occurs in the viscoelastic damper is large. With a single viscoelastic damper, a greater damping effect can be obtained.

According to a third aspect of the present invention, in the elasto-plastic / viscoelastic brace according to the first or second aspect, a longitudinal rib extending in the axial direction is provided at an end of the core member so as to project from the buckling restraint member. A slit whose end face side is open is formed at the end, and the vertical rib of the core material is inserted into the slit, and the viscoelastic damper is attached to the end of the core material through the vertical rib. It is characterized by being.

With regard to the function of the elasto-plastic damper, the applicant of the present application has disclosed such a form as described above.
There is a buckling restraint brace described in Japanese Patent No. 265706.
By inserting the vertical rib of the brace core into the slit, the reinforcement section by the vertical rib and the restraint section by the buckling restraint overlap in the axial direction of the core to prevent local buckling after the core yields. Therefore, the energy absorption performance as the elasto-plastic damper can be efficiently exhibited under both the tensile load and the compressive load.

In this case, by using the vertical rib portion for the end portion on the core material side for attaching the viscoelastic damper, the viscoelastic damper can be attached easily and the compact overall shape can be maintained.

A fourth aspect of the present invention is the elasto-plastic / viscoelastic brace according to the first or second aspect, wherein flanges are provided at both ends in the width direction of the core material at the end portions of the core material. The damper is attached to the end of the core through the flange.

With regard to the function of the elasto-plastic damper, the applicant of the present invention has the above-mentioned configuration in Japanese Patent Laid-Open No. 2001.
There is a buckling restraint brace described in JP-A-214541.
The flange portion has a stiffening effect on the end of the material, and by joining the main frame through this flange, it is possible to design according to the material strength of the flange.

In this case, by using this flange portion at the end portion on the core material side for attaching the viscoelastic damper, the viscoelastic damper can be easily attached and the compact overall shape can be maintained.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, as a typical embodiment of the elasto-plastic / viscoelastic brace of the present invention, a buckling restraint brace (steel buckling made of steel, mainly described in Japanese Patent Laid-Open No. 2000-265706 by the present applicant A constrained brace in which the end of the core material of the brace has a cross section), and
A type in which a viscoelastic damper is incorporated by utilizing the buckling restraint brace described in JP-A-214541 (a buckling restraint brace made of steel, and the end portion of the core material of the brace has an H-shaped cross section). , The cases will be explained.

(1) Embodiment 1-1 (Case 1) FIGS. 1 and 2 show an example in which a viscoelastic damper 6 is attached to a buckling restraint brace having cross-shaped ends according to claims 1 and 3. This is a case where the axial force of the viscoelastic damper 6 flows through a part of the buckling restraint member 2 (this type is referred to as Case 1 below).
Called).

The viscoelastic damper 6 is constructed by laminating a viscoelastic body 7 and a joining member 8, and one end of the viscoelastic damper 6 is fixed with a bolt 14 via a vertical rib 3 at the end of the brace core 1 and an adjusting member 13. The other end is joined to the viscoelastic damper joining member 12 (a steel plate in this example) which is a part of the buckling restraint member 2 by a bolt 14.

When an axial force is applied to the brace in such a state, the steel core material 1 is axially deformed and the viscoelastic body 7 of the viscoelastic damper 6 is sheared and deformed. In FIG. 1, the viscoelastic damper 6 has a shape that can be attached and detached with bolts. However, of course, after the joining member 8 of the viscoelastic damper 6 is joined to the rib 3 and the viscoelastic damper joining member 12 by welding or the like, The body 7 may be manufactured by pouring it between the joining members 8.

As the viscoelastic body 7, for example, high damping rubber,
Acrylic polymers, rubber asphalt, silicone rubber and the like can be used, but the material is not particularly limited as long as it has an elliptic restoring force characteristic.

FIG. 3 shows an example of how the viscoelastic damper 6 is attached to the buckling restraint brace. In this example, the viscoelastic damper 6 in which the viscoelastic body 7 and the joining member 8 are laminated in advance is restrained by buckling. It is designed to be attached to the brace with bolts 14 or the like.

FIG. 4 shows the viscoelastic damper 6 for the case 1.
Is a part of the vertical ribs 3 and the buckling restraint member 2 in the viscoelastic damper 6. The axial force from the viscoelastic damper joining member 12 is applied as a shearing force.

When designing the buckling restraint member 2, it is necessary to design the cross section in consideration of the influence of the axial force of the viscoelastic damper 6 in addition to the buckling stiffening force of the core material 1. In addition, the cross-shaped cross section at the end of the brace core 1 needs to be considered so as not to yield early against the axial force of the core 1 and the axial force of the viscoelastic damper 6.

FIG. 24 shows the restoring force characteristics of the elasto-plastic / viscoelastic damper. When the steel core material 1 stays in the elastic region, only the viscoelastic damper 6 draws a hysteresis loop and wind load. It has the effect of suppressing response displacement in small amplitude areas such as small and medium earthquakes.

When the core material 1 enters the plastic region, the viscoelastic damper 6 and the hysteresis loop due to the plasticization of the core material 1 are superposed, and the effect in a large earthquake is exerted, and the small amplitude to the large amplitude are exerted. The damping effect is exhibited in any of the areas.

(2) Embodiment 1-2 (Case 1) FIGS. 5 to 10 show variations of Case 1. FIG. 5 shows one viscoelastic damper 6 as a viscoelastic body 7.
This is effective when four viscoelastic dampers 6 are installed via the joining member 8 and the proof stress of the viscoelastic damper 6 is required. Of course,
It is also possible to further increase the number of installed viscoelastic bodies 7.

(3) Embodiment 1-3 (Case 1) FIG. 6 shows an example in which the buckling restraint member 2 is composed of a channel steel 2c, a steel plate 2d and a bolt 2e. Even in this case, the attachment method of the viscoelastic damper 6 is the same as that in FIG.

(4) Embodiment 1-4 (Case 1) FIG. 7 shows the case where angle steel is used as the viscoelastic damper joining member 12, and the angle steel is bolted to the web 2a of the buckling restraint 2 by bolts 14 or welded. Are joined together by viscoelastic damper 6
Reaction force mainly flows on the web 2a of the buckling restraint 2 between the left and right viscoelastic damper joining members 12.

(5) Embodiments 1-5 (Case 1) FIG. 8 shows a case where the viscoelastic damper 6 is arranged between the vertical rib 3 and the flange 2b of the buckling restraint member 2, and the reaction force of the viscoelastic damper 6 is shown. Mainly flows to the flange 2b of the buckling restraint 2.

(6) Embodiment 1-6 (Case 1) FIG. 9 shows a case where the viscoelastic damper 6 is arranged between the main body end of the core 1 and the flange 2b of the buckling restraint 2.

(7) Embodiment 1-7 (Case 1) FIG. 10 shows a case where one viscoelastic damper 6 is attached to the vertical rib 3 on one side.

(8) Embodiment 2-1 (Case 2) FIG. 11 shows an example in which the viscoelastic damper 6 is attached to the buckling restraint brace having the cross-shaped ends according to claims 2 and 3, and the viscoelastic damper 6 is attached. The axial force of 6 does not flow into the buckling restraint 2 at all,
This is the case where the brace core material 1 directly flows to both ends (this type is hereinafter referred to as case 2).

In this example, both ends of the viscoelastic damper 6 are
Through the vertical rib 3 at the end of the core material 1 and the adjusting member 13, the bolt 1
It is joined at 4.

The viscoelastic damper 6 has the same structure, deformation behavior, and restoring force characteristics as in Case 1. Further, FIG. 12 shows an example of a method of joining the viscoelastic damper 6 to the buckling restraint brace, and the mounting method is the same as in the case 1.

FIG. 13 shows the flow of force to the viscoelastic damper 6. Direct axial force from the left and right vertical ribs 3 is applied to the viscoelastic damper 6 as a shearing force. Buckling restraint material 2
Since the axial force of the viscoelastic damper 6 is not applied to, the cross-sectional design takes into consideration the usual buckling constraint of the core material 1.

The cross-shaped cross section of the end portion of the brace core material 1 must be designed so as not to yield early against the axial force of the core material 1 and the axial force of the viscoelastic damper 6. Further, the joint member 8 of the viscoelastic damper 6 needs to be designed in cross section so as not to buckle early due to the reaction force of the viscoelastic damper 6.

(9) Embodiment 2-2 (Case 2) FIGS. 14 to 16 show variations of the case 2. In FIG. 14, the viscoelastic body joining member 8 in the central portion of the viscoelastic damper 6 is H. Shaped steel is used to increase the buckling resistance of the joining member 8.

Since the joining member 8 in the central portion does not have to buckle against the reaction force of the viscoelastic damper 6, the sectional shape is steel pipe, polygonal, grooved steel, solid round / polygonal, L-shaped. It may have any shape such as a U-shape, a wavy shape, or the like. Further, the material is not particularly limited to steel material, hard plastic, ceramics, RC member, and the like.

(10) Embodiment 2-3 (Case 2) FIG. 15 shows a case where the viscoelastic body joining member 8 for sandwiching the viscoelastic body 7 is a chevron steel, and the end portion of one chevron steel is the core material 1 To the rib 3 at one end of the core material and the other end of the other angle steel to the rib 3 at the other end of the core material 1 with a bolt 14, and the viscoelastic body 7 is sheared by relative displacement of both angle steels. To transform.

(11) Embodiment 2-4 (Case 2) FIG. 16 shows a case where the viscoelastic damper 6 is arranged between the ends of the main body of the core 1 on both sides.

(12) Embodiment 3-1 (Case 3) FIG. 17 shows an example in which a viscoelastic damper 6 is attached to a buckling restraint brace having an H-shaped cross section according to claims 1 and 4, and the viscoelastic damper 6 is attached. This is a case where the axial force of the damper 6 flows through a part of the buckling restraint member 2 (this type is hereinafter referred to as case 3).

The viscoelastic damper 6 comprises a brace core material 1 made of a steel plate, a flange 15 at the end of the material, and a flange 2 of the buckling restraint material 2.
It is arranged between b. The configuration, deformation behavior, and restoring force characteristics of the viscoelastic damper 6 are the same as in Case 1.

FIG. 18 shows the flow of force to the viscoelastic damper 6 in the case 3, in which the axial force from the flange 15 and the flange 2b of the buckling restraint 2 is sheared by the viscoelastic damper 6. Join as.

When designing the buckling restraint member 2, it is necessary to design the cross section in consideration of the influence of the axial force of the viscoelastic damper 6 in addition to the buckling stiffening force of the core material 1. Also, H at the end of the brace
It is necessary to consider the shape cross section so as not to yield early against the axial force of the core material 1 and the axial force of the viscoelastic damper 6.

(13) Embodiment 3-2 (Case 3) FIGS. 19 and 20 show variations of the case 3. In FIG. 19, the viscoelastic damper 6 is provided with the stiffener 16 at the end of the brace and the buckling restraint member 2. Are disposed between the viscoelastic damper joining members 12 that are a part of the above.

(14) Embodiment 3-3 (Case 3) In FIG. 20, the viscoelastic damper 6 is a flange 1 at the end of the brace.
5 and the viscoelastic damper joining member 12 which is a part of the buckling restraint member 2.

(15) Embodiment 4-1 (Case 4) FIG. 21 shows an example in which a viscoelastic damper 6 is attached to a buckling restraining brace having an H-shaped cross section according to claims 2 and 4, and the viscoelastic damper 6 is attached. The axial force of the damper 6 does not flow into the buckling restraint member 2 at all,
This is a case where the brace core 1 directly flows to both ends (this type is referred to as case 4 hereinafter).

Like the case 2, the viscoelastic body joining member 8 of the viscoelastic damper 6 needs to be designed in cross section so that it is not buckled early by the reaction force of the viscoelastic damper 6. Further, it is necessary to consider that the H-shaped cross section of the end portion of the brace does not yield early against the axial force of the core material 1 and the axial force of the viscoelastic damper 6.

The cross-sectional shape of the viscoelastic body joining member 8 is the case 2
Similar to steel pipe, polygon, channel steel, solid round / polygon,
Any shape such as an L-shape, a U-shape, or a wave shape may be used. Also,
The material is not particularly limited to steel material, hard plastic, ceramics, RC member, and the like.

FIG. 22 shows the flow of force to the viscoelastic damper 6 in the case of the case 4. The axial force from the left and right steel plate flanges 15 is applied to the viscoelastic damper 6 as a shearing force.

(16) Embodiment 4-2 (Case 4) FIG. 15 shows a variation of the case 4 in which the viscoelastic damper 6 is arranged between the stiffeners 16 at both ends.

As described above, in order to realize the combined use of elasto-plasticity and viscoelasticity without changing the shape of the buckling restraint brace as much as possible, how to install the viscoelastic damper 6 is also important.

As a representative embodiment, the case where the buckling restraint brace is made of steel has been described above. However, another metal is used for a part or all of the buckling restraint brace, or an elastic-plastic damper function is exhibited. As long as it is possible, one or both of the core material and the buckling restraint material can be made of a material other than metal.

[0063]

The elasto-plastic / viscoelastic brace of the present invention is
An elasto-plastic damper and a visco-elastic damper are integrated into one brace. By utilizing the respective performances of the elasto-plastic damper and the visco-elastic damper, it is possible to realize a brace that is effective against both wind load and seismic load. it can.

By incorporating a viscoelastic damper into a buckling restraint brace as a conventional elasto-plastic damper whose performance is probable, one brace is elasto-plastic while the overall shape of the buckling restraint brace is not changed as much as possible. Two types of performance, a damper and a viscoelastic damper, can be incorporated.

Since one brace can provide two types of performance, an elasto-plastic damper and a viscoelastic damper, even when it is used for the structure of a building, there are few restrictions due to openings such as windows, and installation is easy. .

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention in which a viscoelastic damper is attached to a buckling restraint brace having a cross-shaped end portion (Embodiment 1-1 of Case 1), and (a) is a front view. Figure, (b) right side view, (c) longitudinal sectional view,
(d) is a sectional view taken along line AA, (e) is a sectional view taken along line BB, and (f) is taken along line C-.
C sectional drawing, (g) is a front view of a viscoelastic damper part.

2A and 2B respectively show a core member and a buckling restraint member used in Embodiment 1-1, wherein FIG. 2A is a front view of the core member, and FIG. 2B is a longitudinal section of the buckling restraint member. It is a figure.

FIG. 3 is a front view showing an example of how to attach the viscoelastic damper to the buckling restraint brace in Embodiment 1-1.

4A and 4B show a flow of force to a viscoelastic damper in the case of case 1, where FIG. 4A is a front view and FIG. 4B is a longitudinal cross-sectional view.

FIG. 5: 4 viscoelastic bodies per 1 viscoelastic damper
It shows a case where a plurality of sheets are installed (Embodiment 1-2 of Case 1), (a) is a front view, (b) is a longitudinal sectional view, (c) is an AA sectional view, d) is a BB sectional view, (e) is a CC sectional view, and (f) is a front view of a viscoelastic damper portion.

FIG. 6 shows a case where the buckling restraint member is composed of channel steel, a steel plate and bolts (Embodiment 1-3 of Case 1), (a) is a front view, and (b) is a longitudinal view. Cross-section view,
(c) is an A-A sectional view, (d) is a BB sectional view, and (e) is a C- sectional view.
It is C sectional drawing.

FIG. 7 shows a case where angle steel is used as a viscoelastic damper joining member (Embodiment 1-4 of Case 1), in which (a) is a front view and (b) is a longitudinal sectional view. (c) is D
-D sectional drawing, (d) is AA sectional drawing, (e) is BB sectional drawing, (f) is CC sectional view, (g) is a front view of a viscoelastic damper part.

FIG. 8 shows a case where a viscoelastic damper is arranged between the vertical ribs and the flange of the buckling restraint member (Embodiment 1 of Case 1).
5) is shown, (a) is a front view, (b) is an AA sectional view, (c) is a BB sectional view, (d) is a CC sectional view, and (e) is a viscous material. It is a front view of an elastic damper part.

FIG. 9 shows a case where a viscoelastic damper is arranged between the end of the core material and the flange of the buckling restraint material (Embodiment 1 of Case 1).
6) is shown, (a) is a front view, (b) is an AA sectional view, (c) is a BB sectional view, and (d) is a CC sectional view.

FIG. 10 is a front view showing a case where one viscoelastic damper is attached to the vertical rib on one side (Embodiment 1-7 of Case 1).

FIG. 11 shows another case (embodiment 2-1 of case 2) in which a viscoelastic damper is attached to a brace having an end portion having a cross section, (a) is a front view, and (b) is (b). Right side view, (c) is a longitudinal sectional view, (d) is an AA sectional view,
(e) is a BB sectional view, (f) is a CC sectional view, and (g) is a front view of a viscoelastic damper portion.

FIG. 12 is a front view showing an example of how to attach a viscoelastic damper to a buckling restraint brace in Embodiment 2-1.

13A and 13B show the flow of force to the viscoelastic damper in case 2, wherein FIG. 13A is a front view and FIG. 13B is a longitudinal cross-sectional view.

FIG. 14 shows a case where the viscoelastic body joining member at the central portion of the viscoelastic damper is H-shaped steel (Embodiment 2-2 of Case 2), (a) is a front view, and (b) is a longitudinal view. Cross-section view,
(c) is an A-A sectional view, (d) is a BB sectional view, and (e) is a C- sectional view.
C sectional drawing, (f) is a front view of a viscoelastic damper part.

FIG. 15 shows a case where the viscoelastic body joining member sandwiching the viscoelastic body is angle steel (Embodiment 2-3 of Case 2), (a) is a front view, and (b) is an AA cross section. Figure, (c) is BB
FIG.

FIG. 16 shows a case where a viscoelastic damper is arranged so as to connect between the end portions of the core material on both sides (Embodiment 2-4 of Case 2).
And (a) is a front view, (b) is a sectional view taken along line AA,
(c) is a BB sectional view.

FIG. 17 shows a case where a viscoelastic damper is attached to a brace having an H-shaped cross section at the end (embodiment 3-1 of case 3), (a) is a front view, and (b) is a right side view. , (C) is A
-A sectional view, (d) is a BB sectional view, (e) is a CC sectional view, (f) is a front view of the core member, and (g) is a longitudinal sectional view of the buckling restraint member. is there.

FIG. 18 is a diagram showing a flow of force to the viscoelastic damper in case 3;

FIG. 19 is a front view showing a case where the viscoelastic damper is arranged between the stiffener and the viscoelastic damper joining member (Embodiment 3-2 of Case 3).

FIG. 20 is a front view showing another example (Embodiment 3-3 of Case 3) in which the viscoelastic damper is arranged between the stiffener and the flange at the end of the core material.

FIG. 21 shows another case (embodiment 4-1 of case 4) in which a viscoelastic damper is attached to a brace having H-shaped cross-sections at the ends, (a) is a front view, and (b) is a view. Is a right side view.

FIG. 22 is a diagram showing a flow of force to a viscoelastic damper in the case of Case 4;

FIG. 23 is a front view showing a case where a viscoelastic damper is arranged between the stiffeners at both ends (Embodiment 4-2 of Case 4).

FIG. 24 is a diagram showing the restoring force characteristics of the elasto-plastic / viscoelastic brace of the present invention.

FIG. 25 is a schematic view showing a combined use example of a conventional viscoelastic brace and an elastic-plastic brace.

[Explanation of symbols]

1 ... Core material, 2 ... Buckling restraint material, 2a ... Web, 2b ... Flange, 2c ... Channel steel, 2d ... Steel plate, 2e ... Assembly bolt, 2f ... Gap adjusting steel plate, 3 ... Vertical rib, 4 ... Slit ,
5 ... Cushioning material, 6 ... Viscoelastic damper, 7 ... Viscoelastic body, 8 ...
Joining member, 9 ... Buckling restraint material concave portion, 10 ... Core material convex portion, 11
... Bolt hole, 12 ... Viscoelastic damper joining member, 13 ...
Mounting position adjusting member, 14 ... Bolt, 15 ... Flange steel plate, 16 ... Stiffener, 17 ... Elasto-plastic brace, 18 ...
Viscoelastic brace, 19 ... Pillar, 20 ... Beam, 21 ... Buckling restraint brace

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Nakao Iida             4-53 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture             Sumitomo Metal Industries, Ltd. (72) Inventor Hiroyuki Ikezawa             4-53 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture             Sumitomo Metal Industries, Ltd. F-term (reference) 2E001 DG01 DG02 FA71 FA73 GA52                       GA53 GA54 GA55 GA59 GA62                       HA04 HA14 HB02 HD01 HE01                       KA03 LA01 LA11                 3J048 AA05 AC05 BD08 EA38

Claims (4)

[Claims] 1. A core material that constitutes a brace, and a buckling restraint material that is provided around the cross section of the core material and restrains deformation in a direction intersecting the axial direction of the core material. In a buckling restraint brace whose both ends project from the ends of the buckling restraint, a viscoelastic damper is provided between the end of the core member and the buckling restraint. Elastic-plastic / viscoelastic brace. 2. A core material that constitutes a brace, and a buckling restraint material that is provided around the cross section of the core material and restrains deformation in a direction intersecting the axial direction of the core material. A buckling restraint brace having both ends projecting from ends of the buckling restraint, wherein viscoelastic dampers are provided between both ends of the core member. 3. A vertical rib is provided at an end of the core member, and a slit whose end face side is open is formed at an end of the buckling restraint member, and the vertical rib is inserted into the slit. The elasto-plastic viscoelastic brace according to claim 1 or 2, wherein the viscoelastic damper is attached to an end portion of the core member through the vertical rib. 4. A flange is provided at each end of the core material in the width direction of the core material, and the viscoelastic damper is attached to the end of the core material via the flange. The elasto-plastic / viscoelastic brace according to claim 1 or 2, wherein