Vibration-damping brace

Abstract

To provide a vibration control brace which has small temperature dependency and is simply manufactured.SOLUTION: A vibration control brace 1 for a structure in which a damper unit 30 is provided along a shaft member includes: a first shaft member 10 whose one end is connected to a framework of the structure and that is made of steel; a second shaft member 20 that is installed along the surface of the first shaft member 10 and is made of steel and whose other end opposite to the one end is connected to a framework of the structure; and the damper unit 30 interposed between the first shaft member 10 and the second shaft member 20. The damper unit 30 includes a high attenuation rubber 31, and a pair of steel plates 32 fixed to both surfaces of the high attenuation rubber 31, the one steel plate 32 is bonded and joined to the first shaft member 10 through a two-pack acrylic resin-based adhesive layer for a structure, and the other steel plate 32 is bonded and joined to the second shaft member 20 through a two-pack acrylic resin-based adhesive layer for a structure.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vibration-damping brace for a structure in which a damper unit is provided along a shaft member. [Background technology]

[0002] In recent years, in order to improve the livability of various structures and ensure their safety during earthquakes, various vibration-control structures have been developed that not only ensure the seismic safety of the framework itself consisting of columns and beams, but also reduce the shaking of the structure caused by earthquakes, strong winds, etc., by adding special devices and parts to the framework. Known types of such vibration-control structures include those that incorporate into the framework viscoelastic dampers that absorb energy through the shear deformation of viscoelastic materials, and hysteretic dampers that utilize the energy absorption capacity of metal materials through plastic deformation. The viscoelastic damper has the advantage that the viscoelastic body has excellent responsiveness even to small deformations, thereby reducing small vibrations that occur in the structure due to strong winds, etc. However, when a large velocity or large deformation is applied, such as during a major earthquake, an excessive shear force is generated, and the reaction force is transmitted to the framework, causing destruction of the framework. In addition, there is a risk that the excessive deformation may cause the damper to break, resulting in the loss of its function as a damper. In contrast, hysteretic dampers can effectively absorb energy during large earthquakes through the hysteretic damping of components, thereby reducing shaking, but they cannot function effectively against small shaking caused by strong winds, etc., and therefore cannot be expected to improve livability.

[0003] Therefore, as seen in Patent Document 1, a vibration-damping brace has been proposed that combines a viscoelastic damper and a hysteretic damper. This vibration-damping brace has a shaft member made of flat steel plate or cruciform steel material, both ends of which are connected to the framework of the structure, with an elastic portion with a large axial area and a yielding portion with a small axial area, and a steel pipe member with an opposing surface is arranged on the surface of the shaft member so that it can move freely relative to the surface, and these steel pipe members are connected to each other to form a composite vibration-damping brace. In this composite vibration-damping brace, a viscoelastic material is interposed between the shaft member and the steel pipe member in the elastic portion, and a discontinuous portion is formed in the shaft member with a gap that can absorb the expansion and contraction of the composite vibration-damping brace, and the steel pipe member is fixed to the shaft member on the side of the discontinuous portion where the viscoelastic material is not interposed. According to the vibration-damping brace in Prior Art Document 1, an elastic portion and a yielding portion are formed in the shaft member, a viscoelastic material is interposed between the shaft member and the steel pipe member in the elastic portion, and a discontinuous portion with a gap is provided in the shaft member, so that a viscoelastic damper using the viscoelastic material and a hysteretic damper actuated by the yielding portion of the shaft member are arranged in series. As a result, when small vibrations of the structure occur due to strong winds or the like, they can be absorbed first by the shear deformation of the viscoelastic material interposed between the shaft member and the steel pipe member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4370731 Summary of the Invention [Problem to be solved by the invention]

[0005] However, viscoelastic materials have a problem of inconsistency in damping performance due to their high temperature dependency, and there is a risk of them exerting a large damping force, especially at low temperatures. Therefore, by using dampers made of high-damping rubber, which has low temperature dependency, it is possible to suppress variations in damping performance, but vulcanization bonding is required to fix the high-damping rubber to the steel material. Because vulcanization bonding must be performed inside a high-temperature, high-pressure furnace, there are limitations on the size of the components that can be bonded, making it difficult to apply to braces. In other words, it is difficult to achieve this simply by changing the viscoelastic material used to high-damping rubber. From this perspective, an object of the present invention is to provide a vibration-damping brace that has little temperature dependency and is easy to manufacture. [Means for solving the problem]

[0006] In order to solve these problems, the vibration-damping brace of the first invention is a vibration-damping brace for a structure in which a damper unit is provided along an axis member, and the vibration-damping brace comprises a first steel axis member having one end connected to the framework of the structure, a second steel axis member installed along the surface of the first axis member and having the other end opposite to the one end connected to the framework of the structure, and a spring between the first axis member and the second axis member. Multiple arrays The damper unit is configured with high-damping rubber and a pair of steel plates fixed to both sides of the high-damping rubber, one of the steel plates being adhesively bonded to the first shaft member via a layer of two-component acrylic resin structural adhesive, and the other steel plate being adhesively bonded to the second shaft member via a layer of two-component acrylic resin structural adhesive. According to the vibration-damping brace of this invention, a relatively small damper unit is formed by fixing high-damping rubber to a steel plate, which eliminates the need for a large oven for vulcanization bonding and reduces temperature dependency. Furthermore, by adhesively joining the first and second shaft members to the steel plates via a two-component acrylic resin structural adhesive layer, there is no need to use high-strength bolts to join the shaft members to the damper unit, reducing the number of bolts required. This simplifies the manufacture of the vibration-damping brace and increases the flexibility of its application.

[0007] In a second aspect of the present invention, the first shaft member has an H-shaped cross section with a flange and a web, the second shaft members have a U-shaped cross section and are arranged back-to-back on both sides of the web, the damper units sandwiched between the structural adhesive layers are arranged between the web and each of the second shaft members and are adhesively bonded with a two-component acrylic resin structural adhesive, and the second shaft members arranged on both sides of the web are connected to each other with bolts that pass through the web. This configuration can increase the compressive rigidity of the vibration-damping brace against buckling. In a vibration-damping brace according to a third aspect of the present invention, the first shaft member has a square-shaped cross section, and the second shaft member has a square-shaped cross section and is disposed along the inner or outer peripheral surface of the first shaft member. The damper unit is sandwiched between the structural adhesive layers and is bonded between the first and second shaft members in the middle, excluding the four corners, with gaps formed at the four corners. Gaps are preferably formed at the four corners. This configuration enhances the vibration-damping performance and compressive rigidity against buckling of the vibration-damping brace. [Effects of the Invention]

[0008] According to the vibration-damping brace of the present invention, the temperature dependency of the vibration-damping brace can be reduced and manufacturing can be simplified. [Brief explanation of the drawings]

[0009] [Figure 1] 1A is a cross-sectional view showing a vibration-damping brace according to a first embodiment of the present invention, and FIG. 1B is a side view. [Figure 2] 1A is a cross-sectional view showing a vibration-damping brace according to a first embodiment of the present invention in the middle of manufacturing, and FIG. 1B is a side view. [Figure 3]1A is a side view showing a damper unit of a vibration-damping brace according to a first embodiment of the present invention, and FIG. 1B is a plan view. [Figure 4] 1A and 1B are diagrams illustrating the manufacturing process of the damper unit of the vibration-damping brace according to the first embodiment of the present invention, in which (a) is a plan view showing a formwork for pressing down high-damping rubber, (b) is a plan view showing a formwork for pressing down steel plates, and (c) is a cross-sectional view showing a compressor. [Figure 5] 5(a) to 5(c) are cross-sectional views illustrating a manufacturing process of a vibration-damping brace according to a first embodiment of the present invention. [Figure 6] 10 is a graph comparing the temperature dependence of linear rubber and the temperature dependence of high damping rubber. [Figure 7] 1 is a graph comparing the stress-strain curve of linear rubber with the stress-strain curve of high-damping rubber. [Figure 8] (a) is a plan view of the building model used for performance verification, and (b) is an elevation view. [Figure 9] 9 is a graph showing the maximum story drift angle calculated by performing an analysis on the building model of FIG. 8. [Figure 10] (a) is a cross-sectional view showing a vibration-damping brace according to the second embodiment of the present invention, (b) is a view taken along line B in Figure 10(a), (c) is a cross-sectional view taken along line CC in Figure 10(a), and (d) is a cross-sectional view taken along line DD in Figure 10(a). DETAILED DESCRIPTION OF THE INVENTION

[0010] (First embodiment) The present invention provides a vibration-damping brace for a structure in which a damper unit is provided along an axis member and both are adhesively joined with a structural adhesive layer. In a first embodiment, the first axis member constituting the axis member is an H-shaped steel member, and the second axis member is a U-shaped steel member, with the damper unit installed between the H-shaped steel member and the U-shaped steel member (Figs. 1 to 5). In a second embodiment, the first and second axis members constituting the axis member are both square-shaped steel members, with one square-shaped steel member inserted inside the other square-shaped steel member, and the damper unit installed between both square-shaped steel members (Fig. 10). A vibration-damping brace according to a first embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1 shows a cross-sectional view and a side view of the vibration-damping brace, and Figure 2 shows a cross-sectional view and a side view of the vibration-damping brace in the middle of its manufacture. The vibration-damping brace according to the present invention is a structural brace in which a damper unit is attached to the shaft member of the brace. As shown in Figures 1 and 2, the vibration-damping brace 1 includes a first shaft member 10, a second shaft member 20, and a damper unit 30.

[0011] The first shaft member 10 is a long steel member having one end (the left end in Figure 1(b) and Figure 2(b)) connected to the framework of a structure (for example, a corner formed by a joint between a column and a beam). The first shaft member 10 has an H-shaped cross section and is made of H-beam steel, with a flange portion 12 and a web portion 11. A long hole 13 is formed in the web portion 11. A bolt B that connects the first shaft member 10 and the second shaft member 20 is inserted into the long hole 13. The long hole 13 is formed long in the axial direction of the first shaft member 10. A plurality of long holes 13 are formed at intervals in the axial direction of the first shaft member 10 at each of both widthwise ends of the web portion 11 (both vertical end portions in Figure 1).

[0012] The second shaft member 20 is a long steel member that is installed along the surface of the first shaft member 10 so as to be movable in the axial direction of the first shaft member 10. The other end of the second shaft member 20 (the right end in FIG. 1(b) and FIG. 2(b)) opposite to one end of the first shaft member 10 is connected to the framework of the structure (for example, a corner of a column-beam joint that faces the corner to which the first shaft member 10 is connected). The second shaft member 20 is disposed offset in the axial direction from the first shaft member 10, with the side from which the first shaft member 10 protrudes being one end and the side from which the second shaft member 20 protrudes being the other end. The second shaft member 20 has a U-shaped cross section and includes a bottom portion 21 and sidewall portions 22, and is made of channel steel. Two second shaft members 20 are provided, and are arranged back-to-back on both sides of the web portion 11 of the first shaft member 10. Specifically, on both sides of the web portion 11, the bottom portions 21 of the second shaft members 20 face the web portion 11 of the first shaft member 10 with a predetermined gap therebetween, and the sidewall portions 22 of the second shaft members 20 face the inner surfaces of the flange portions 12 of the first shaft member 10 with a predetermined gap therebetween. In other words, the second shaft member 20 is arranged with a U-shaped cross section gap in the space surrounded by the web portion 11 and flange portions 12 of the first shaft member 10. A round hole 23 is formed in the bottom portion 21. A bolt B is inserted into the round hole 23 to connect the first shaft member 10 and the second shaft member 20. The round holes 23 are formed to a size that allows the shank of the bolt B to be inserted therethrough. The round holes 23 are formed at positions facing the elongated holes 13, and a plurality of the round holes 23 are formed at intervals in the axial direction of the second shaft member 20 at each of both widthwise ends of the bottom 21 (both vertical ends in FIG. 2).

[0013] The damper unit 30 is made of a web portion 11 of the first shaft member 10 and a bottom portion of the second shaft member 20. 3 is a side view and a plan view showing the damper unit 30. As shown in FIG. 3, the damper unit 30 includes high-damping rubber 31 and a steel plate 32. The damper unit 30 is a vibration-damping member interposed between the first shaft member 10 and the second shaft member 20 and connects the first shaft member 10 and the second shaft member 20 so that the first shaft member 10 and the second shaft member 20 can move relatively. FIG. 3 is a side view and a plan view showing the damper unit 30. As shown in FIG. 3, the damper unit 30 includes high-damping rubber 31 and a steel plate 32.

[0014] The high-damping rubber 31 is a rubber with high hardness, has a greater damping force than the rubber of a viscoelastic damper, and can be used for earthquakes. Specifically, the high-damping rubber 31 of this embodiment is an isoprene-based rubber with nonlinear characteristics. The allowable strain is 200%, the limit strain is 300%, and the maximum damping force is 400 kN. The high-damping rubber 31 has a low temperature dependency of 0.70 (30°C / 10°C). For example, "VS4" manufactured by Sumitomo Rubber Industries, Ltd. is used as the high-damping rubber 31. From the perspective of manufacturing methods, it is difficult to mold the high-damping rubber 31 into a complex shape, but in this embodiment, it is formed into a simple rectangular plate shape.

[0015] The steel plates 32 are a pair of plate materials fixed to both sides of the high-damping rubber 31 and have a rectangular plane. The steel plates 32 are fixed to the high-damping rubber 31 by vulcanization bonding. The planar shape of the steel plates 32 is larger than the planar shape of the high-damping rubber 31, and the peripheral edges of the steel plates 32 protrude by a certain width beyond the peripheral edges of the high-damping rubber 31. A structural adhesive is applied to the surface of the steel plates 32 to form a structural adhesive layer. The damper unit 30 is fixed to the first shaft member 10 and the second shaft member 20 by this structural adhesive layer. The adhesive strength of the structural adhesive layer is designed to withstand the maximum damping force of the high-damping rubber 31. The damper unit 30 is disposed between the long holes 13, 13 in the web portion 11 of the first shaft member 10 and is installed so as not to interfere with the bolt B. A plurality of damper units 30 are arranged along the axial direction of the first shaft member 10.

[0016] The manufacturing process of the damper unit 30 will be described below with reference to FIG. 4. FIG. 4 is a diagram illustrating the manufacturing process of the damper unit 30. When manufacturing the damper unit 30, as shown in FIG. 4, high-damping rubber 31 is placed in a rubber mold 33 (see FIG. 4(a)), and a steel plate 32 is placed in a steel plate mold 34 (see FIG. 4(b)). The high-damping rubber 31, rubber mold 33, steel plate 32, and steel plate mold 34 are set in a press 35, placed in an oven, and pressed from both sides in the thickness direction by the press 35, followed by vulcanization under high temperature and pressure (see FIG. 4(c)). The upward-pointing black triangles and downward-pointing black triangles in FIG. 4 indicate the compression directions of the press 35. Fig. 5 is a cross-sectional view illustrating the manufacturing process of a vibration-damping brace. As shown in Fig. 5, one steel plate 32 of the damper unit 30 is bonded to the web portion 11 of the first shaft member 10 via a layer of two-component acrylic resin structural adhesive, and the other steel plate 32 of the damper unit 30 is bonded to the bottom portion 21 of the second shaft member 20 via a layer of two-component acrylic resin structural adhesive. In other words, the first shaft member 10 and the second shaft member 20 are connected via the damper unit 30. For example, the structural adhesive used may be "Y618H" or "Y630D" from the Metal Lock series manufactured by Cemedine Co., Ltd.

[0017] Next, the assembly procedure for the vibration-damping brace 1 will be described with reference to Figure 5. When assembling the vibration-damping brace 1, first, a structural adhesive is applied to the entire surface of the steel plate 32 of the damper unit 30 to form a structural adhesive layer. Then, as shown in Figure 5(a), the damper units 30, 30 are attached to both side surfaces of the web portion 11 of the first shaft member 10. At this time, because the structural adhesive layer is formed on the entire surface of the steel plate 32, the damper unit 30 is fixed to the web portion 11 over a wide contact area. Thereafter, as shown in Figure 5(b), the second shaft members 20, 20 are arranged back to back with the web portion 11 sandwiched between them. The bottom portion 21 of the second shaft member 20 is attached to the surface of the steel plate 32 of the damper unit 30 via a structural adhesive layer. The second shaft member 20 is arranged offset in the axial direction of the first shaft member 10. 5(c), the bolt B is inserted through the long hole 13 of the first shaft member 10 and the round hole 23 of the second shaft member 20, and the nut N is screwed onto it to secure the first shaft member 10 and the second shaft member 20 together. This completes the vibration-damping brace 1.

[0018] The following describes the effects of the vibration-damping brace 1 according to this embodiment. The vibration-damping brace 1 of this embodiment forms a relatively small damper unit 30 by fixing high-damping rubber 31 to steel plates 32. This eliminates the need for a large oven for vulcanization bonding and reduces temperature dependency. Figure 6 is a graph showing the absorbed energy of linear rubber and high-damping rubber at various temperatures. As shown in Figure 6, the high-damping rubber 31 of this embodiment exhibits a smaller decrease in absorbed energy than the linear rubber when the temperature rises from 0°C to 40°C. In other words, the high-damping rubber 31 has low temperature dependency and can absorb large amounts of energy even at high temperatures. Furthermore, the vibration-damping brace 1 of this invention uses high-damping rubber 31 that has relatively low temperature and frequency dependency, a high maximum shear stress intensity, and a large damping force across the entire bonding area by adhesively bonding the shaft member and the damper unit 30 via a two-component acrylic resin structural adhesive layer 40. Figure 7 is a graph showing the relationship between shear stress and strain for linear rubber and that for high-damping rubber. As shown in Figure 7, high-damping rubber 31 has a larger hysteresis loop than linear rubber, and can adapt to larger shear stresses. In other words, high-damping rubber 31 has a greater damping force than linear rubber.

[0019] Next, the results of performance verification of the vibration-damping brace 1 of this embodiment will be described. Fig. 8 shows a plan view and an elevation view of a building model used to verify the performance of the vibration-damping brace 1, and Fig. 9 is a graph showing the maximum story drift angle calculated by performing an analysis on the building model. As shown in Fig. 8, the building model 50 used for the analysis is a 20-story steel-framed building with a height of 82 m, with a floor height of 6 m per floor and 4 m per standard floor. In Fig. 8, the reference numeral "51" indicates a column and "52" indicates a beam. The building area is 1,802 m 2 The building weight is approximately 34,000 tons, and the natural period T is 2.6 seconds. The vibration control braces 1 are installed between X2 and X3 streets and between X7 and X8 streets on the column and beam frames along Y1 and Y4 streets on each floor. The rubber used for the dampers is "ISD111" manufactured by 3M Japan Co., Ltd. for conventional rubber and "VS4" manufactured by Sumitomo Rubber Industries, Ltd. for high-damping rubber 31, with an attachment area of ​​400,000 mm. 2 The rubber thickness is 20 mm, the frequency is 0.5 Hz, and the temperature is 20°C. Figure 9 shows the results of an analysis conducted under these conditions for three cases: vibration-dissipating brace 1, conventional rubber, and no dampers. As shown in Figure 9, when vibration-dissipating brace 1 is used, the inter-story drift angle is smaller on most floors than when conventional rubber is used or when no dampers are used. In particular, on floors 2 to 6 and floors 13 to 16, where the inter-story drift angle is large, the inter-story drift angle when vibration-dissipating brace 1 is used is greater than when other cases are used, demonstrating a significant vibration-control effect.

[0020] Furthermore, in the vibration-damping brace 1 of this embodiment, the steel plates 32 are joined to the first shaft member 10 and the second shaft member 20 via a structural adhesive layer, so there is no need to use high-strength bolts to join the first shaft member 10 and the second shaft member 20 to the damper unit 30. This means that the number of bolts used can be reduced, simplifying the manufacture of the vibration-damping brace 1 and increasing the flexibility of its application. Furthermore, in the vibration-damping brace 1 of this embodiment, the first shaft member 10 has an H-shaped cross section, and the second shaft member 20 has a U-shaped cross section and is arranged back to back on both sides of the web portion 11.The first shaft member 10 and the second shaft member 20 are connected by a bolt B that passes through the long hole 13 in the web portion 11 and the round hole 23 in the bottom portion 21.Therefore, the second shaft member 20 functions as a stiffening member for the first shaft member 10, thereby increasing the compressive rigidity of the vibration-damping brace 1 against buckling.

[0021] Furthermore, since multiple damper units 30 are arranged side by side in the axial direction, by changing the number of damper units 30 installed, it can be applied to braces of various lengths. Furthermore, the vibration-damping brace 1 has the second shaft member 20 with a U-shaped cross section installed between the flanges 12, 12 of the first shaft member 10 with an H-shaped cross section, so it is less likely to spoil the aesthetic appearance when installed within the frame of a building.In addition, the installation space for the vibration-damping brace 1 can be reduced.

[0022] Second Embodiment Next, a vibration-damping brace according to a second embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 10 is a cross-sectional view and an arrow view showing the vibration-damping brace according to the second embodiment. As shown in FIG. 10, the vibration-damping brace 5 of the second embodiment differs from the first embodiment in the shapes of the first shaft member 15 and the second shaft member 25. The vibration-damping brace 5 includes the first shaft member 15, the second shaft member 25, and a damper unit 30.

[0023] The first shaft member 15 is a long member having one end (the left end in (b) to (d) of Figure 10) connected to the framework of the structure. The first shaft member 15 has a rectangular cross section (a square cylindrical shape) and is made of a hollow steel block. The first shaft member 15 has four wall portions 16, 16·· that are perpendicular to each other. The second shaft member 25 is a long member installed along the inner peripheral surface of the first shaft member 15 so as to be movable in the axial direction. The other end of the second shaft member 25 (the right end in (b) to (d) of FIG. 10 ) opposite to one end of the first shaft member 15 is connected to the framework of the structure (the corner opposite to the corner to which the first shaft member 15 is connected). The second shaft member 25 has a rectangular cross section (a square tube shape) and is made of a hollow steel beam. The second shaft member 25 has four wall portions 26, 26·· that are perpendicular to each other. The second shaft member 25 is inserted inside the first shaft member 15. The wall portion 26 of the second shaft member 25 and the wall portion 16 of the first shaft member 15 are arranged with a predetermined clearance between them. This clearance serves as a space in which the damper unit 30 is installed. The second shaft member 25 is arranged offset in the axial direction from the first shaft member 15. The side from which the first shaft member 15 protrudes is one end, and the side from which the second shaft member 25 protrudes is the other end. In this embodiment, the second shaft member 25 is inserted into the first shaft member 15, but this is not limited to this, and the structure may be such that the first shaft member 15 is inserted into the second shaft member 25.

[0024] The damper unit 30 includes high-damping rubber 31 and a steel plate 32. The high-damping rubber 31 and the steel plate 32 have the same configuration as in the first embodiment. In this embodiment, the damper unit 30 has a rectangular shape that is long in the axial direction of the first shaft member 15, and multiple damper units 30 are arranged adjacent to each other in the axial direction. The damper units 30 are arranged in the middle (the space between the opposing wall portions 16, 26) of the clearance between the inner peripheral surface of the wall portion 16 of the first shaft member 15 and the outer peripheral surface of the wall portion 26 of the second shaft member 25, excluding the four corners. The damper units 30 are fixed to the wall portions 16, 26 by structural adhesive layers formed on the surfaces of the steel plates 32, 32. No members are provided at the four corners of the clearance, forming gaps S.

[0025] The vibration-damping brace 5 of the second embodiment provides the same effects as the first embodiment. Furthermore, because both the first shaft member 15 and the second shaft member 25 have a square cross section and the installation area of ​​the damper unit 30 is large, the vibration-damping performance and compressive rigidity against buckling of the vibration-damping brace 5 can be further improved.

[0026] While the above describes embodiments of the present invention, the present invention is not limited to these embodiments, and appropriate design modifications are possible without departing from the spirit of the present invention. For example, in the above embodiment, the damper unit 30 is configured by a pair of steel plates 32, 32 vulcanization-bonded to both sides of a single piece of high-damping rubber 31, but this is not limiting. A thicker damper unit may be formed by alternately stacking multiple high-damping rubbers and steel plates and arranging steel plates on both end faces of the stack. This allows for the formation of a large damper unit with a large cross-sectional area, even when the planar shape of the damper unit is limited by the size of the furnace and mold. [Explanation of symbols]

[0027] 1,5 Vibration-damping brace 10,15 First shaft member 11 Web Department 12 Flange 20,25 Second shaft member 30 Damper unit 31 High damping rubber 32 Steel plate 40 Structural adhesive layer B Bolt S Gap

Claims

1. A vibration-damping brace for a structure in which a damper unit is provided along a shaft member, a first steel shaft member having one end connected to the framework of the structure; a second shaft member made of steel, the second shaft member being installed along the surface of the first shaft member and having the other end opposite to the one end connected to the frame of the structure; a plurality of damper units arranged between the first shaft member and the second shaft member; The damper unit is configured to include high-damping rubber and a pair of steel plates fixed to both sides of the high-damping rubber, One of the steel plates is adhesively bonded to the first shaft member via a two-component acrylic resin structural adhesive layer, and the other steel plate is adhesively bonded to the second shaft member via a two-component acrylic resin structural adhesive layer. A vibration-damping brace characterized by:

2. the first shaft member has an H-shaped cross section including a flange portion and a web portion, The second shaft member has a U-shaped cross section and is disposed back-to-back on both side surfaces of the web portion, the damper unit sandwiched between the structural adhesive layers is disposed between the web portion and each of the second shaft members, and is adhesively bonded with a two-component acrylic resin-based structural adhesive; The second shaft members disposed on both sides of the web portion are connected to each other by a bolt passing through the web portion. The vibration-damping brace according to claim 1 .

3. The first shaft member has a square cross section, the second shaft member has a square cross section and is disposed along an inner circumferential surface or an outer circumferential surface of the first shaft member, Between the first shaft member and the second shaft member, the damper unit sandwiched between the structural adhesive layers is disposed in an intermediate portion excluding the four corners, and is adhesively bonded with a two-component acrylic resin structural adhesive, and gaps are formed at the four corners. The vibration-damping brace according to claim 1 .

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