Vibration-damping brace

Abstract

The main objective is to obtain vibration-damping braces with a large elastic limit deformation that can be mass-produced. [Solution] The vibration-damping brace 1 comprises a core material 11, a cylindrical restraining member 12 that covers the outer circumference of the core material 11, and end reinforcing portions 13 provided at both ends 11a of the core material 11 and extending between the inner and outer surfaces of each end 12a of the restraining member 12. The core material 11 has a zigzag shape, in which vertical plate portions 15 extending in the axial direction 14 and horizontal plate portions 16 intersecting the axial direction 14 are alternately connected. The restraining member 12 has a gap 17 between it and the core material 11, and when an external force 14 in the axial direction acts on the core material 11 and it attempts to buckle, it receives the vertical plate portion 15 and restrains the buckling of the core material 11.

Description

Technical Field

[0001] This invention relates to a vibration control brace.

Background Art

[0002] Brace (diagonal member) is widely used as a seismic member of structures such as buildings. Since a brace can reinforce efficiently against horizontal forces and can suppress relatively construction costs compared with a moment frame structure, it is widely used as a seismic member. Note that structures where braces are used are not limited to buildings.

[0003] However, when a brace is installed in a structure having a moment frame structure, since the elastic deformation range of the brace with respect to the inter-story deformation amount of the structure is small, the brace is damaged before the moment frame structure of the structure can fully function. In the Building Standards Law, since a design that does not permit damage is performed in the primary design, when a brace is installed in a structure having a moment frame structure, the primary design strength is determined by the brace that is damaged first.

[0004] On the other hand, braces have been proposed that increase the apparent length, reduce the rigidity of the brace, and do not get damaged even when deformation progresses (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The brace described in Patent Document 1 above has a complicated structure and also requires welding in production, so it takes a lot of labor for processing and is not suitable for mass production. This is the same even when the brace is used for structures other than those having a moment frame structure.

[0007] Therefore, the main objective of the present invention is to contribute to improving the above-mentioned problems. [Means for solving the problem]

[0008] In response to the above problems, the present invention provides: It comprises a core material, a cylindrical restraining member covering the outer circumference of the core material, and end reinforcing portions provided at both ends of the core material and extending between the inner and outer surfaces of each end of the restraining member, The core material has a zigzag shape, in which vertical plate sections extending in the axial direction and horizontal plate sections intersecting the axial direction are alternately connected. The restraining member is characterized by having a gap between itself and the core material, and by being a vibration-damping brace that restrains the buckling of the core material by receiving the vertical plate portion when an external force in the axial direction acts on the core material and attempts to buckle. [Effects of the Invention]

[0009] The present invention, through the above configuration, makes it possible to obtain a vibration-damping brace with a large elastic limit deformation and that can be mass-produced. [Brief explanation of the drawing]

[0010] [Figure 1] This is a side view showing the vibration-damping brace according to Example 1 installed on the wall surface of a structure. [Figure 2] (a) is a perspective view of the assembled vibration damping brace of this embodiment, and (b) is an exploded perspective view of the vibration damping brace. [Figure 3] These are enlarged cross-sectional views of the core material, where (a) shows the case when the angle is 90° and (b) shows the case when the angle is less than 90°. [Figure 4] This graph shows the relationship between inter-story displacement angle and load-bearing capacity in the vibration-damping brace of this embodiment. [Figure 5] This graph shows the relationship between inter-story displacement angle and load-bearing capacity in a typical brace. [Figure 6] This is a side view showing the vibration-damping brace according to Example 2 installed on the wall surface of a structure. [Figure 7] Figure 7 is an exploded perspective view of the vibration-damping brace. [Modes for carrying out the invention]

[0011] This embodiment will be described in detail with reference to Figures 1 to 7. [Examples]

[0012] <Configuration>This embodiment has the following configuration.

[0013] As shown in Figure 1, the vibration-damping brace 1 is attached to a building or other structure 2 as an earthquake-resistant component, for example.

[0014] Here, the vibration-damping brace 1 is a long, slender member (diagonal brace) attached to the structure 2 to act as an earthquake-resistant member, and it exhibits a vibration-damping function. The vibration-damping brace 1 provides earthquake resistance to the structure 2 by resisting horizontal forces such as earthquakes.

[0015] The vibration-damping brace 1 is attached, for example, directly to the wall surface 3 of the structure 2, or to a panel installed on the wall surface 3. The ends 1a of the vibration-damping brace 1 are attached at an angle between the vertical members 4 and horizontal members 5 that make up the wall surface 3 or panel, or between adjacent vertical members 4. For example, in the case of a wall surface 3, the vertical members 4 are columns or studs, and the horizontal members 5 are beams. Also, for example, in the case of a panel, the vertical members 4 are vertical frame members, and the horizontal members 5 are horizontal frame members. The structure 2 (its vertical members 4 and horizontal members 5) is provided with connecting members 2a for joining the vibration-damping brace 1 by bolting or the like, as needed.

[0016] A building is a structure fixed to the land. The building can be of any kind, but in this embodiment, for ease of understanding, examples of buildings such as detached houses and apartment houses will be described. The building can have any structure, but for example, it can be a unit building. A unit building is a building that can be constructed in a short period by transporting prefabricated building units to the construction site and assembling them at the construction site. The building unit has a box frame structure inside, in which the upper ends of four columns are connected in a substantially rectangular shape by four ceiling beams, and the lower ends of the four columns are connected in a substantially rectangular shape by four floor beams. The building unit becomes a structure 2 having a frame structure by the unit frame. The columns of the building unit become vertical members 4, and the ceiling beams and floor beams become horizontal members 5.

[0017] The structure 2 is an artificial structure such as a building provided on the ground. The structure 2 can be of any kind, but in this embodiment, the structure 2 is a unit building having a frame structure. Note that the vibration damping brace 1 can also be attached to a structure 2 that does not have a frame structure.

[0018] (1) As shown in FIGS. 2(a) and 2(b), the vibration damping brace 1 may include a core material 11, a cylindrical restraint member 12 that covers the outer periphery of the core material 11, and end reinforcement portions 13 provided at both ends 11a of the core material 11 and extending across the inside and outside of each end 12a of the restraint member 12. The core material 11 may have a zigzag shape in which vertical plate portions 15 extending in the axial direction 14 and horizontal plate portions 16 intersecting the axial direction 14 are alternately connected. The restraint member 12 has a gap 17 (FIG. 3) between it and the core material 11, and when an external force in the axial direction 14 acts on the core material 11 and the core material 11 is about to buckle, it may restrain the buckling of the core material 11 by receiving the vertical plate portion 15.

[0019] In this embodiment, the vibration-damping brace 1 is mainly a double-structured seismic-resistant member having a core material 11 and a restraining member 12. The vibration-damping brace 1 can be made of metal, resin, or the like. In this embodiment, the vibration-damping brace 1 is made of metal.

[0020] The core material 11 is an insertion member installed in the center of the vibration-damping brace 1, which has a double structure. The core material 11 is formed to be longer than the restraining member 12, with both ends 11a protruding outward from both ends 12a of the restraining member 12. It is preferable that the core material 11 be made as a single piece, but it may also be made by connecting multiple members to form a single unit.

[0021] The restraining member 12 is a cylindrical member (outer cylinder) installed on the outside of the double-structured vibration-damping brace 1, and surrounds almost the entire area of ​​the zigzag-shaped portion of the core material 11 to restrain the buckling of the core material 11. The restraining member 12 is preferably constructed as a single piece, but it may also be made by connecting multiple members to form a single unit. The restraining force against buckling of the core material 11 by the restraining member 12 is set and adjusted by, for example, the strength and plate thickness of the restraining member 12. The restraining member 12 may have any cross-sectional shape as long as it has a cylindrical portion. The restraining member 12 has a hollow portion that extends continuously in the axial direction 14 with a uniform cross-section in the cylindrical portion. The restraining member 12 is preferably made into a rectangular cylinder with a rectangular cross-section in the cylindrical portion.

[0022] The rectangular tubular restraint member 12 may be formed by combining two U-shaped steel sections 12d, each having a web portion 12b and a pair of flange portions 12c, with the open ends of the U-shapes facing each other. In this case, the two steel sections 12d may be bolted together at the overlapping flange portions 12c using fastening and fixing members 12e such as bolts. The fastening and fixing members 12e may be fixed to the flange portions 12c almost perpendicular to the surface, from the outer surface to the inner surface. The restraint member 12 made of steel sections 12d may have pre-drilled holes for bolts in the flange portions 12c. The two steel sections 12d combined into a rectangular tubular shape may be the same size, or one may be sized to fit and accommodate the inside of the other.

[0023] Furthermore, a stopper 18 or the like may be provided between the core material 11 and the restraining member 12 to prevent the restraining member 12 from moving significantly in the axial direction 14 relative to the core material 11. In this example, the stopper 18 is a fastening and fixing member 12e, such as a bolt, that integrates the two structural steel sections 12d of the restraining member 12. The fastening and fixing member 12e becomes a stopper 18 by, for example, entering into the space of at least one of the irregularities in the zigzag-shaped core material 11 and locking the restraining member 12 to the core material 11. In the figure, multiple fastening and fixing members 12e are provided along the axial direction 14 so as to enter into each of the irregularities in the core material 11. The bolt may also be used as a stopper 18 by, for example, forming an elongated hole in the core material 11 that extends in the axial direction 14 and displaceably inserting the bolt into the elongated hole in the core material 11.

[0024] The end portion 11a of the core material 11 is located at the end of the axial direction 14 of the core material 11, extends linearly in the axial direction 14, and at least a portion of it protrudes outward from the end portion 12a of the restraining member 12. Preferably, the end portion 11a of the core material 11 is located on the approximately central axis of the restraining member 12. The end portion 11a of the core material 11 that protrudes outward is attached to the structure 2.

[0025] The end portion 12a of the restraining member 12 is located at the end of the axial direction 14 of the restraining member 12 and has an opening through which the core material 11 passes.

[0026] "Extending from the inside to the outside" means that a part of the end reinforcement portion 13 attached to the end 11a of the core material 11 is inserted into the inside of the restraining member 12, while the other part of the end reinforcement portion 13 protrudes to the outside of the restraining member 12.

[0027] The end reinforcement portion 13 is a plate-shaped member or part made of metal or resin that reinforces the end 11a of the core material 11. The end reinforcement portion 13 is integrated with the end 11a of the core material 11, overlapping it with the end 11a that extends linearly in the axial direction 14. The end reinforcement portion 13 may be made of a separate member from the core material 11 and may be joined to the end 11a of the core material 11 in advance by adhesive or bolt fixing. The end reinforcement portion 13 of the separate member may, for example, have approximately the same shape as the end 11a of the core material 11 and have the same or greater plate thickness as the core material 11. Alternatively, the end reinforcement portion 13 may be made into a single unit by bending the end 11a of the core material 11 to double it. Or, the end reinforcement portion 13 may be installed when attaching the vibration damping brace 1 to the structure 2.

[0028] The axial direction 14 is the direction in which the long vibration-damping brace 1 extends (longitudinal direction), or the direction in which the central axis of the core material 11 and the restraining member 12 extends.

[0029] The vertical plate portion 15 is a substantially rectangular plate-shaped part of the zigzag-shaped core material 11 that has a surface extending in the axial direction 14. Multiple vertical plate portions 15 of substantially the same shape and size are provided. Multiple vertical plate portions 15 are installed in series with a spacing of substantially the same length as the vertical plate portion 15 with respect to the axial direction 14. The vertical plate portion 15 has a width (for example, the vertical dimension in the figure) that is substantially the same as or slightly narrower than the spacing between the inner surfaces of the upper and lower sides (flange portion 12c) in Figure 2 of the rectangular tubular restraining member 12. The vertical plate portion 15 is arranged parallel to the inner surfaces of the left and right sides (web portion 12b) in Figure 2 of the rectangular tubular restraining member 12, with a small gap 17 between them.

[0030] The horizontal plate portion 16 is a substantially rectangular plate-shaped part of the zigzag-shaped core material 11, having a surface that extends in a direction intersecting the axial direction 14. Multiple horizontal plate portions 16 of substantially the same shape and size are provided. The horizontal plate portions 16 are spaced apart in multiple stages, facing each other, with a distance from each other that is substantially the same as the length of the vertical plate portion 15 with respect to the axial direction 14. The horizontal plate portion 16 has a width (for example, the upper and lower dimension in the figure) that is substantially the same as or slightly narrower than the distance between the inner surfaces of the upper and lower sides (flange portion 12c) in Figure 2 of the rectangular tubular restraining member 12. In addition, the horizontal plate portion 16 has a length (left and right dimension in the figure) that is slightly less than the left and right sides (web portion 12b) in Figure 2 of the rectangular tubular restraining member 12.

[0031] Furthermore, in order to position the end portion 11a of the core material 11 approximately on the central axis of the restraining member 12, the vertical plate portion 15 and horizontal plate portion 16 located near the end portion 11a may be made to differ in size from the other vertical plate portion 15 and horizontal plate portion 16 as necessary.

[0032] The zigzag shape is a regular repeating shape that extends in the axial direction 14 while reciprocating in a direction intersecting the axial direction 14. The zigzag shape is a shape that can expand and contract by elastic deformation in the axial direction 14. The zigzag shape may be, for example, a curved sinusoidal wave shape, but since the peaks are points or lines, it is preferable to have a rectangular wave or trapezoidal wave shape with a flat surface (vertical plate portion 15) at the peak. In this embodiment, the zigzag shape is made by arranging vertical plate portions 15 and horizontal plate portions 16 of approximately the same shape and size alternately and connecting them in a wave-like continuous manner. The core material 11 of the zigzag shape may be formed by press-forming a strip-shaped steel plate of a constant width and uniform thickness.

[0033] The gap 17 is a small space secured and formed between the inner surface of the rectangular tubular restraining member 12 and the core material 11. The gap 17 is formed almost uniformly between the multiple vertical plate portions 15 and the inner surface of the restraining member 12 by making the horizontal plate portion 16 just short of reaching the inner surface of the restraining member 12.

[0034] The gap 17 changes when an external force is applied to the core material 11, causing it to deform. Since the gap 17 directly affects the performance of the vibration-damping brace 1 as an earthquake-resistant member, it is important to control its dimensions with high precision during manufacturing. If the gap 17 is set small, the vertical plate portion 15 will hit the restraining member 12 earlier, reducing the amount of deformation possible for the core material 11. If the gap 17 is set large, the vertical plate portion 15 will hit the restraining member 12 later, increasing the amount of deformation possible for the core material 11. For example, the gap 17 is set to be greater than 0 mm but less than or equal to a few mm.

[0035] External forces are vertical and horizontal forces (mainly horizontal forces) acting on structure 2 due to earthquakes, etc., causing inter-story deformation in structure 2. Compressive and tensile forces in the axial direction 14 are acted on the vibration-damping brace 1, which is attached diagonally to structure 2, by the external forces, and the core material 11 is deformed by expanding and contracting in the axial direction 14 or by deforming (buckling) in a direction intersecting the axial direction 14 inside the restraining member 12.

[0036] (2) As shown in Figure 3, in the vibration damping brace 1, The core material 11 may have an angle 21 with respect to the axial direction 14 of the horizontal plate portion 16 set to 1° to 90°.

[0037] Here, angle 21 is the angle of refraction between the vertical plate portion 15 and the horizontal plate portion 16, and is, for example, the interior angle of the entrance portion of the recess formed by the vertical plate portion 15 and the horizontal plate portion 16. For example, as shown in Figure 3(a), if angle 21 is close to 90°, it becomes possible to secure and form a greater number of repetitions of the zigzag shape of the core material 11. Also, as shown in Figure 3(b), if angle 21 is less than 90°, the force required for bending between the vertical plate portion 15 and the horizontal plate portion 16 can be increased.

[0038] Furthermore, the core material 11 is elastically deformed in a direction that increases the angle 21 by an external force (compressive axial force) in the axial direction 14.

[0039] (3) In the above vibration damping brace 1, A lubricant 31 may be provided in the gap 17 between the vertical plate portion 15 of the core material 11 and the inner surface of the restraining member 12.

[0040] Here, the lubricant 31 is a material that improves the sliding between the vertical plate portion 15 of the core material 11 and the inner surface of the restraining member 12. The lubricant 31 can be liquid, paste, gel, or solid, as long as it adheres to the gap 17 (stable over a long period of time). The lubricant 31 can be, for example, liquid lubricating oil, paste-like grease, lubricating gel, or a resin lubricating plate.

[0041] The lubricant 31 is installed, for example, on the inner surface of the restraint member 12 facing the vertical plate portion 15 by application, adhesion, coating, or surface treatment. The lubricant 31 may also be installed on the side of the core material 11 facing the vertical plate portion 15. The lubricant 31 may also be installed to protect the vertical plate portion 15 and the restraint member 12 by covering their inner surfaces.

[0042] <Effect> The effect of this embodiment is as follows:

[0043] The vibration-damping brace 1 is manufactured relatively easily by press-forming a long, narrow strip of steel to form a zigzag-shaped core material 11, and then inserting the core material 11 into a rectangular tubular restraining member 12. The end reinforcement portion 13 is attached to the end 11a of the core material 11 before or after press-forming. Alternatively, the end reinforcement portion 13 may be sandwiched in place when attaching the vibration-damping brace 1 to the structure 2. Therefore, the vibration-damping brace 1 can be assembled with few parts and without welding, resulting in a low cost and high productivity. The restraining member 12 may also be pre-treated with lubricant 31 on its inner surface.

[0044] The vibration-damping brace 1 is attached, for example, directly to the wall surface 3 of a structure 2 such as a building, or to a panel installed on the wall surface 3.

[0045] For example, the vibration-damping brace 1 is installed along the surface of the wall 3 or panel of the structure 2, at an angle to the vertical plate portion 15 that makes up the wall 3 or panel. In this case, both ends 11a and the end reinforcement portion 13 of the core material 11 are oriented in the direction of the wall 3 or panel or perpendicular to the surface. Also, the vertical plate portion 15 of the core material 11 is oriented in the direction of the wall 3 or panel or perpendicular to the surface. However, the orientation of the vertical plate portion 15 in relation to the wall 3 or panel is not limited to this.

[0046] For example, when an external force such as an earthquake acts on the structure 2, the wall surface 3 or panel deforms such that the vertical members 4, which are provided in a nearly vertical direction, tilt diagonally relative to the horizontal members 5 that extend in a nearly horizontal direction. As a result, the vibration-damping brace 1 has compressive and tensile forces acting on its core material 11 in the axial direction 14. The compressive axial force causes the core material 11 to deform (buckle) so that the multiple vertical plate sections 15, which are arranged in series with gaps between them, move closer to each other, and the entire structure bends in the direction perpendicular to the surface of the vertical plate sections 15 (buckling direction). Due to the deformation in the buckling direction, the vertical plate sections 15 and the inner surface of the restraining member 12, which normally faced each other with a gap 17 between them, come into contact. The core material 11 is deformed to a size corresponding to the strength of the compressive axial force, and the vertical plate sections 15 come into contact with the restraining member 12 with a strength corresponding to the amount of deformation of the core material 11. Furthermore, when the vertical plate portion 15 contacts the inner surface of the restraining member 12, it receives the vertical plate portion 15 and restrains the buckling of the core material 11. As a result, the vibration-damping brace 1 resists horizontal forces such as earthquakes and provides earthquake resistance to the structure 2.

[0047] As described above, by arranging a large number of vertical plate sections 15 that are displaced by compressive axial force in the axial direction 14, the vibration-damping brace 1 can be made to not yield up to an inter-story drift angle of 1 / 120, as shown in Figure 4. By not yielding up to an inter-story drift angle of 1 / 120, the vibration-damping brace 1 of this embodiment can be combined with a rigid frame structure 2, such as the building unit described above, to fully demonstrate the original performance of the rigid frame structure 2.

[0048] In contrast, as shown in Figure 5, a typical brace yields at an inter-story drift angle of about 1 / 500. Therefore, when combined with a rigid frame structure 2, the vibration-damping brace 1 is damaged before the rigid frame structure 2 can fully perform its intended function.

[0049] Furthermore, the Building Standards Act stipulates that structure 2 must be designed in a way that does not allow for damage during the initial design phase. In this embodiment, the vibration-damping brace 1 does not yield up to an inter-story drift angle of 1 / 120, thus preventing the primary design strength of structure 2 from being determined by the vibration-damping brace 1. Therefore, by using the vibration-damping brace 1, structure 2 can have improved design flexibility. This is also true for structure 2 that has a rigid frame structure other than a building unit.

[0050] Furthermore, the vibration-damping brace 1 achieves nearly equivalent structural performance against compressive and tensile forces by having multiple vertical plate sections 15 arranged in series with intervals between them on a core material 11, which move closer to or further apart from each other. Therefore, it can be attached directly to the wall surface 3 of the structure 2, or to panels installed on the wall surface 3, starting from one panel.

[0051] <Effects> The effects of this embodiment are as follows:

[0052] (Effect 1) The vibration-damping brace 1 may include a zigzag-shaped core material 11 formed by alternately connecting vertical plate sections 15 and horizontal plate sections 16, a restraining member 12 covering the outer circumference of the core material 11, and an end reinforcing section 13. The zigzag-shaped core material 11 can be formed by press-forming a strip-shaped steel plate, thus requiring less processing time and eliminating the need for welding. Furthermore, since the vibration-damping brace 1 is made up of only the three components described above, it has a simple structure, is inexpensive, and can be easily manufactured without welding, making mass production possible.

[0053] Furthermore, the vibration-damping brace 1 may be configured such that when an external force 14 in the axial direction acts on the core material 11 and it attempts to buckle, the restraining member 12 receives the vertical plate portion 15 of the core material 11 and restrains the buckling of the core material 11. With such a buckling restraint structure, the vibration-damping brace 1 can exhibit the same rigidity and strength under compressive axial force as under tensile axial force, thus enabling an increase in the elastic limit deformation. For example, when the vibration-damping brace 1 is combined with a rigid frame structure 2, the vibration-damping brace 1 can efficiently reinforce the structure 2, making it possible to design the structure 2 in such a way that the rigid frame structure of the structure 2 can perform to its full potential.

[0054] (Effect 2) The vibration-damping brace 1 may have an angle 21 between 1° and 90° between the core material 11 and the axial direction 14 of the horizontal plate portion 16. By adjusting the angle 21, the core material 11 can set and adjust the number of vertical plate portions 15 installed and the force required for bending between the vertical plate portions 15 and the horizontal plate portions 16, thereby providing structural flexibility.

[0055] (Effect 3) The vibration damping brace 1 may have a lubricant 31 placed in the gap 17 between the vertical plate portion 15 of the core material 11 and the inner surface of the restraining member 12. This allows for slight sliding of the vertical plate portion 15 along the inner surface of the restraining member 12 when an external force acts on the core material 11 and the vertical plate portion 15 comes into contact with the inner surface of the restraining member 12, while restraining the buckling of the core material 11. Furthermore, the lubricant 31 protects the vibration damping brace 1, prevents rust, and ensures that it always operates smoothly. [Examples]

[0056] <Configuration>This embodiment has the following configuration.

[0057] As shown in Figures 6 and 7, multiple core materials 11 may be arranged inside the restraining member 12.

[0058] In Figure 7, the core material 11 consists of two pieces, core material 11(A) and core material 11(B), but structurally, it can consist of three, four, or five or more pieces. However, it is preferable to insert only two to three core materials 11. It is preferable that the multiple core materials 11 have approximately the same zigzag shape. The multiple core materials 11 are inserted parallel to each other so that they do not overlap, intertwine, or fit together tightly.

[0059] In this case, the multiple core materials 11 are installed inside the restraining member 12, with the restraining member 12 and the vertical plate portion 15 having a small gap 17 and being almost parallel to each other, and the corresponding vertical plate portions 15 of adjacent core materials 11 are arranged facing each other almost parallel to each other with a small gap 32. In this case, it is preferable that the core materials 11 have the zigzag-shaped protrusions and recesses in the reverse pattern so that adjacent vertical plate portions 15 are aligned in the axial direction 14 and facing each other with almost no misalignment, however, the vertical plate portions 15 may be facing each other with a slight misalignment.

[0060] The gap 32 between the opposing vertical plate sections 15 may be made approximately the same size as the gap 17 between the core material 11 and the restraining member 12, so that contact occurs almost simultaneously due to external force. Alternatively, the gap 32 between the opposing vertical plate sections 15 may be made different in size from the gap 17 between the core material 11 and the restraining member 12, so that contact occurs with a time difference due to external force.

[0061] Even if the core material 11 is made multiple layers, the restraining member 12 may remain the same as that of Example 1. However, the restraining member 12 may be made different from that of Example 1, for example, by increasing the plate thickness to increase strength or by making it slightly larger. In this embodiment, the restraining member 12 is made of a single piece, such as a rectangular steel pipe 12f. In each embodiment, the restraining member 12 may be made of shaped steel 12d or a rectangular steel pipe 12f.

[0062] Furthermore, if multiple core materials 11 are used, the core materials 11 are reinforced by overlapping and integrating their ends 11a (forming end reinforcement parts 13 with each other), so separate end reinforcement parts 13 may or may not be provided.

[0063] Since the configuration other than that described above is the same as in Example 1, the description of Example 1 will be used to describe this Example 2.

[0064] <Effects> The effects of this embodiment are as follows:

[0065] Multiple core materials 11 may be arranged inside the restraint member 12. By using multiple core materials 11, when an external force is applied to the vibration-damping brace 1, the opposing vertical plate portions 15 can be brought into surface contact from a state where there is a gap 32, thereby providing a buckling restraint effect. Additionally, when an external force is applied to the vibration-damping brace 1, the vertical plate portions 15 and the inner surface of the restraint member 12 can be brought into surface contact from a state where there is a gap 17, thereby providing a buckling restraint effect.

[0066] As a result, the vibration-damping brace 1, which has multiple core materials 11, can double its rigidity and load-bearing capacity in the axial direction 14. For example, by installing two core materials 11 (core material 11(A), core material 11(B)), the vibration-damping brace 1 can double its rigidity and load-bearing capacity in the axial direction 14.

[0067] Furthermore, if the vibration-damping brace 1 is structured to restrain the buckling of the core material 11 by the restraining member 12, the vibration-damping brace 1 needs to be designed with attention to overall buckling, and the dimensions of the gaps 17 and 32 in the buckling direction need to be controlled. As in this embodiment, by using multiple core materials 11 in the vibration-damping brace 1, the brace can be divided into multiple members, and precision can be achieved for each of them, making dimensional control easier and enabling cost reduction.

[0068] Furthermore, since the effects and other aspects are the same as those in Example 1, the description of Example 2 will be the same as that of Example 1. [Explanation of Symbols]

[0069] 1. Vibration-damping brace 1a end 11 Core material 11a End 12 Restraining member 12a end 13 End reinforcement section 14 Axial direction 15 Vertical board section 16 Horizontal plate part 17 gaps 21 angle 31 Lubricants

Claims

1. It comprises a core material, a cylindrical restraining member covering the outer circumference of the core material, and end reinforcing portions provided at both ends of the core material and extending between the inner and outer surfaces of each end of the restraining member, The core material has a zigzag shape, in which vertical plate sections extending in the axial direction and horizontal plate sections intersecting the axial direction are alternately connected. The vibration-damping brace is characterized in that the restraining member has a gap between itself and the core material, and when an external force in the axial direction acts on the core material and attempts to cause it to buckle, it receives the vertical plate portion and restrains the buckling of the core material.

2. A vibration-damping brace according to claim 1, The vibration-damping brace is characterized in that the angle of the horizontal plate portion with respect to the axial direction is between 1° and 90°.

3. A vibration-damping brace according to claim 1 or claim 2, A vibration-damping brace characterized by having a lubricant in the gap between the vertical plate portion of the core material and the inner surface of the restraining member.

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