Buckling-restrained brace

Abstract

To provide buckling restriction braces of various sizes hardly adversely affected by welding bead of a projected part provided at a core material, while using common width of unbonded materials.SOLUTION: A buckling restriction brace 1 has a core material 2 having joint parts 22 for jointing other materials to both ends in the long side direction of a plate-like body 21, a restriction material 3 arranged facing each face orthogonal to the weak shaft direction of the plate-like body 21, an unbonded material 4 arranged between the core material 2 and the restriction material 3, and a projection part 25 projected from a center side of each face of the plate-like body 21 in the core material 2 and engaged with a receiving recessed part 33 formed to the restriction 3 side. The unbonded material 4 has narrow width not reaching an end in the short side direction of the plate-like body 21, and is positioned at a center side in the short side direction of the plate-like body 21, not overlapping on a welding bead 25a of a base part side of the projection part 25 at a part where the projection part 25 is positioned, and is stuck to be positioned at the short side direction of the projection part 25.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] This invention relates to a buckling restraint brace provided with an unbonded material.

Background Art

[0002] Patent Document 1 discloses a buckling restraint brace in which an anti-slip projection protruding toward the restraint material side is welded at the base end to a core material, a projection receiving metal fitting into which the anti-slip projection fits and engages is embedded in a concrete-based material of the restraint material, a relief recess for allowing a welding bead at the base end of the anti-slip projection to enter is provided in the concrete-based material, and the projection receiving metal fitting is provided in a range where it does not contact the welding bead but contacts the anti-slip projection.

[0003] Patent Document 2 discloses a buckling restraint brace having a core material and a pair of restraint materials arranged along both surfaces of the core material. Each of the pair of restraint materials has a channel-shaped steel material with an opening on the core material side and mortar or concrete filled in the channel-shaped steel material.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the buckling restraint brace, the width of the unbonded material is the same as the width of the core material, and since the width of the core material can be designed with a fine change width, the unbonded material was also manufactured with a width that matches the width design of the core material. For this reason, there was labor in processing the unbonded material, resulting in a delay in the delivery date of the unbonded material and a decrease in the yield.

[0006] On the other hand, the core material has a projection for anti-slip purposes in the center of its weak axis surface, and in order to avoid the projection when overlapping with the restraining material, a technique using, for example, the projection receiving hardware disclosed in Patent Document 1 is useful. However, Patent Document 1 and Patent Document 2 do not disclose anything about processing the unbonded material to avoid adverse effects caused by the unbonded material overlapping with the weld bead formed on the base side of the projection.

[0007] This invention aims to standardize the width of the unbonded material for buckling-restrained braces of various sizes, while appropriately avoiding the weld beads of the protrusions provided on the core material, thereby reducing the adverse effects of said weld beads. [Means for solving the problem]

[0008] The buckling restraint brace of this invention comprises a core material having joints at both ends in the long-side direction of a plate-like body for joining with other members, restraint members arranged opposite each face of the plate-like body perpendicular to the weak axis direction, an unbonded material located between the core material and the restraint members, between one joint and the other joint of the core material, and projections protruding from each face of the plate-like body and fitting into receiving recesses formed on the restraint member side to prevent the restraint member from shifting, The unbonded material described above has a narrow width that does not reach the edge in the short-side direction of the plate-like body, is located near the center in the short-side direction of the plate-like body, and is characterized by having an insertion portion or a separated portion for positioning to avoid the projection and the weld bead on the base side of the projection.

[0009] With the above configuration, the unbonded material has a narrow width that does not reach the edge in the short-side direction of the plate-like body, so that unbonded material of a common width can be used for buckling-restrained braces of various sizes, thereby avoiding delays in the delivery of unbonded material and improving yield. Furthermore, since the unbonded material has an insertion portion or a spaced portion to avoid the projection and the weld bead on the base side of the projection, it can be made less susceptible to adverse effects from the weld bead of the projection.

[0010] Here, the configuration in which the unbonded material is divided into two at the location of the protrusion to form the separated portion has the advantage of being easy to manufacture because it is a simple configuration in which one part of the unbonded material and the other part of the unbonded material are attached in the direction of the long side of the plate-like body. However, the unbonded material is absent on the short side (width direction) of the core material at the location of the protrusion.

[0011] The unbonded material may be located on the side of the projection in the direction of the shorter side, thereby avoiding the absence of the unbonded material on the side of the projection in the direction of the shorter side.

[0012] The unbonded material described above may consist of a single continuous unbonded material having a length from one joint side to the other joint side of the core material and having the insertion portion. This allows for more efficient fabrication of the buckling-restrained brace by using a single continuous unbonded material. Furthermore, the portion of the unbonded material that wraps around to the short-side direction by the insertion portion will be positioned to sandwich the projection from the short-side direction.

[0013] The above-mentioned unbonded material may comprise a short unbonded material having the insertion portion and a long unbonded material extending from the end of the short unbonded material toward the joint. With this arrangement, the short unbonded material can be easily positioned toward the center of the core material by passing the projection through the insertion portion. Furthermore, by stocking the short unbonded material with the insertion portion already formed in rolls or in layers as a common product, delays in delivery and yield can be avoided for the short unbonded material as well, and the efficiency of manufacturing buckling-restrained braces can be improved. The long unbonded material can also be stocked as a common product of a certain width.

[0014] The unbonded material described above may form the gap by having two horizontally attached unbonded materials located on the short-side side of the projection, having a length approximately the same as the length of the projection in the long-side direction, and a long unbonded material extending from the end of the horizontally attached unbonded materials towards the joint. In this case, two horizontally attached unbonded materials located on the short-side side of the projection are required, but the overall structure of the unbonded material is arranged continuously from one joint side to the other joint side of the core material.

[0015] The unbonded material described above may form the gap by comprising two horizontally attached unbonded materials that have a length longer than the length of the projection in the long-side direction and are located on the short-side side of the projection, and a long unbonded material whose one end is sandwiched from the short-side side by the two horizontally attached unbonded materials and whose other end extends toward the joint. In this case, two horizontally attached unbonded materials located on the short-side side of the projection are required, but the overall structure of the unbonded material is such that it extends from one joint side of the core material to the other joint side without interruption, and a portion of it is arranged adjacent to another on a plate-like body.

[0016] The unbonded material described above may consist of two continuous unbonded materials having a length from one joint side to the other joint side of the core material, and being spaced apart from each other in the short-side direction at least at the location where the projection is located, thereby forming the separated portion. This requires two continuous unbonded materials, but the formation of the separated portion is relatively easy. [Effects of the Invention]

[0017] This invention provides a common width for the unbonded material in buckling-restrained braces of various sizes, while also reducing the adverse effects of the weld bead on the projections provided on the core material. [Brief explanation of the drawing]

[0018] [Figure 1] This is a perspective view showing the appearance of the buckling-restrained brace of the embodiment. [Figure 2] It is a schematic cross-sectional view of the buckling restraint brace of FIG. 1. [Figure 3] It is an exploded explanatory view of the buckling restraint brace of FIG. 1. [Figure 4] Figs. (A), (B), and (C) thereof are explanatory views showing other examples of the unbonded material. [Figure 5] Figs. (A) and (B) thereof are explanatory views showing other examples of the unbonded material. [Figure 6] It is an explanatory view showing other examples of the unbonded material.

Mode for Carrying Out the Invention

[0019] (Embodiment 1) Hereinafter, embodiments of this invention will be described based on the accompanying drawings. As shown in FIGS. 1 and 2, the buckling restraint brace 1 of the embodiment includes a core material 2, a pair of restraint materials 3, and an unbonded material 4.

[0020] The core material 2 has an elongated steel plate-like body 21 and joint portions 22 located at both ends in the long side direction of the plate-like body 21 for joining with other members, and is fixed to the building frame by bolts passed through bolt insertion holes formed in the joint portions 22. The joint portions 22 form a substantially cross-sectional shape by welding and fixing plate pieces २२b orthogonally to extension portions २२a extending from both ends of the plate-like body २१. <०००००९८>

[0021] As shown in FIG. 3, the restraint material 3 is respectively located opposite to each surface (weak axis surface) orthogonal to the weak axis direction of the plate-like body 21 of the core material 2. Each restraint material 3 includes a box-shaped member 31 and a cured member 32. <0००००१०१>

[0022] Each box-shaped member 31 is made of a steel plate bent into a channel-shaped steel form, having a pair of opposing surfaces and a connecting surface that connects the opposing surfaces, with an opening located on the core material 2 side. One side of the opposing surfaces of the box-shaped member 31 is higher in height than the other side. The higher opposing surface of one box-shaped member 31 overlaps the outside of the lower opposing surface of the other box-shaped member 31, and the pair of restraining members 3 are fixed to each other by welding at this overlapping portion. In addition, a rod-shaped spacer 35 that is long in the longitudinal direction of the box-shaped member 31 is fixed by welding or the like at a position corresponding to the height where the core material 2 is positioned on the inner surface of the higher opposing surface of each box-shaped member 31.

[0023] Furthermore, wall portions 31a that form the end shape of the box-shaped member 31 are welded and fixed to both ends of the box-shaped member 31. The height of the wall portions 31a is the same as the height of the lower opposing surface of the box-shaped member 31. A recessed portion 31b is formed in the center of the wall portions 31a by being recessed to avoid interference with the lowered portion of the plate piece portion 22b of the joint portion 22.

[0024] The hardened member 32 is filled and hardened inside the box-shaped member 31, and is, for example, mortar or concrete.

[0025] The core material 2 is provided with pin-shaped anti-slip projections 25 that protrude from both sides of the core material 2 at its central point, while the inner surface of the box-shaped member 31 is provided with receiving recesses 33 to receive the projections 25. The projections 25 are inserted into the receiving recesses 33 when assembling the buckling-restrained brace 1. That is, the projections 25 protrude from the center of each weak axis surface of the plate-like body 21 in the core material 2 and fit into the receiving recesses 33 formed on the restraining material 3 side to prevent the restraining material 3 from shifting. The projections 25 are made of steel, such as steel rods, and are joined by, for example, being inserted into holes provided in the core material 2 and welded together. This welding forms a weld bead 25a on the base end side of the projection 25. It is also possible to configure the projections 25 to protrude at a point slightly offset in the longitudinal direction of the plate-like body 21 from the center of each weak axis surface of the plate-like body 21, and it is also possible to configure two or more projections 25 to protrude from each weak axis surface.

[0026] The unbonded material 4 is positioned between the core material 2 and the restraining material 3, specifically between one joint 22 and the other joint 22 of the core material 2. The thickness of the unbonded material 4 provides a clearance, and when the plate-like body 21 is subjected to compressive force, a wave-like deformation occurs. The unbonded material 4 is made of, for example, butyl rubber.

[0027] Furthermore, the unbonded material 4 has a narrow width that does not reach the edge in the short-side direction of the plate-like body 21, and is located on the short-side central side of the plate-like body 21. The width of the unbonded material 4 can be, for example, about 20% or more of the length (width) in the short-side direction of the plate-like body 21, and is wider than the width of the projection 25 including the weld bead 25a. Note that the unbonded material 4 with a width of 20% for a plate-like body 21 of a certain width may be, for example, 80% for another plate-like body 21 of a different width.

[0028] Furthermore, in this embodiment, the unbonded material 4 is a single continuous unbonded tape having a length from one joint 22 side to the other joint 22 side of the core material 2, and having a slit 4a as an insertion part through which the projection 25 passes. The slit 4a is cut in the direction of the long side of the plate-like body 21 at the center of the unbonded material 4, and is widened towards the short side of the core material 2 when the projection 25 passes through.

[0029] In other words, the unbonded material 4 has a slit 4a as an insertion portion for positioning itself while avoiding the projection 25 and the weld bead 25a, and is located on the shorter side of the projection 25 without overlapping with the projection 25 and the weld bead 25a.

[0030] With the above configuration, the unbonded material 4 has a narrow width that does not reach the edges of the core material 2 in the short-side direction, so the width of the unbonded material 4 can be standardized for buckling-restrained braces 1 of various sizes. In other words, a narrow unbonded tape that does not reach the edges of the core material 2 in the short-side direction can be used for core material 2 of various sizes, thus preventing delays in the delivery of the unbonded material 4 and improving yield.

[0031] Furthermore, in the area where the projection 25 is located, the unbonded material 4 has its cut 4a widened so that it does not overlap with the weld bead 25a of the projection 25, thus making it less susceptible to adverse effects from the weld bead 25a.

[0032] Furthermore, since the unbonded material 4 is a single continuous unbonded tape having a length from one joint 22 side to the other joint 22 side of the core material 2 and having a slit 4a through which the projection 25 passes, the efficiency of manufacturing the buckling-restrained brace 1 can be improved. In addition, the portion of the unbonded material 4 that wraps around to the short side side by the slit 4a is positioned to sandwich the projection 25 from the short side side.

[0033] The unbonding material 4 can be attached to the plate-like body 21 by, for example, pulling the unbonding material 4 from a roll of unbonding material 4, and when the unbonding material 4 reaches the projection 25, a cut 4a can be formed in the unbonding material 4 using a cutter. The cut 4a is desirable because it does not generate scrap material by partially cutting out the unbonding material 4, but instead of a cut 4a, an opening may be formed by partially cutting out the unbonding material 4. The size of this opening may be the same as the surrounding edge of the weld bead 25a, but to avoid overlap, it may be made, for example, 0.5 to 2 mm larger than the surrounding edge. The above opening can be formed using a dedicated cutting tool instead of a cutter.

[0034] (Embodiment 2) Other embodiments of this invention will be described below with reference to Figure 4(A). Components similar to those in Embodiment 1 are denoted by the same reference numerals and their descriptions are omitted. The buckling-restrained brace 1 in this embodiment includes an unbonded material 4A. This unbonded material 4A has a narrow width that does not reach the edge of the plate-like body 21 in the short-side direction, is located on the short-side central side of the plate-like body 21, and, where the projection 25 is located, is positioned to avoid the weld bead 25a on the base side of the projection 25.

[0035] The unbonded material 4A comprises a short unbonded material 41 having an opening 4b in its center, which is an insertion part through which the projection 25 passes, and a long unbonded material 42 that is longer than the short unbonded material 41 and extends from the end of the short unbonded material 41 toward each joint 22. The size of the opening 4b may be the same as the peripheral edge of the weld bead 25a, but to prioritize avoiding overlap, it may be made, for example, 0.5 to 2 mm larger than the peripheral edge.

[0036] The short unbonded material 41 has a quadrilateral shape, for example, consisting of two sides parallel to the short side direction of the plate-like body 21 and two sides parallel to the long side direction of the plate-like body 21. The length (width) of the sides parallel to the short side direction is longer than the width of the weld bead 25a of the projection 25 in the short side direction, and the length of the sides parallel to the long side direction is longer than the length of the weld bead 25a of the projection 25 in the long side direction. Also, the length (width) of the sides parallel to the short side direction of the long unbonded material 42 is, for example, shorter than the side length in the short side direction (width direction) of the short unbonded material 41.

[0037] The short unbonded material 41 can be easily positioned on the center of the plate-like body 21 by passing the projection 25 through the opening 4b. The short unbonded material 41 can be attached to the plate-like body 21 first, and then the long unbonded material 42 can be attached to the joint 22 side from the edge of the short unbonded material 41.

[0038] By stocking rolls of short unbonded material 41 with pre-formed openings 4b, laminates of multiple such short unbonded material 41 stacked together, or individually packaged short unbonded material 41 as common products, delays in delivery and improvements in yield can be avoided for the short unbonded material 41, and the efficiency of manufacturing the buckling-restrained brace 1 can be improved. Similarly, long unbonded material 42 can also be stocked as common rolls of a certain width.

[0039] Furthermore, it is desirable, from the viewpoint of improving the yield of short unbonded material 41 with the opening 4b already formed, that the size of the projection 25 be made as standardized as possible in buckling-restrained braces 1 of various sizes. Alternatively, a cut may be formed in the unbonded material 4A instead of the opening 4b.

[0040] (Embodiment 3) Hereinafter, other embodiments of the present invention will be described with reference to Figure 4(B). Components similar to those in Embodiment 1 are denoted by the same reference numerals and their descriptions are omitted. The buckling-restrained brace 1 of this embodiment includes an unbonded material 4B. This unbonded material 4B has a narrow width that does not reach the edge of the plate-like body 21 in the short-side direction, and is located on the short-side central side of the plate-like body 21. At the location of the projection 25, it has a spaced portion 4c to avoid the weld bead 25a on the base side of the projection 25.

[0041] The unbonded material 4B forms the gap 4c by having two horizontally attached unbonded materials 43 that are located on the short-side side of the projection 25 and have approximately the same length as the projection 25 in the long-side direction, and by having a long unbonded material 42 that extends from the end of the horizontally attached unbonded material 43 toward each joint 22. In this example, the width of the horizontally attached unbonded material 43 is about half the width of the long unbonded material 42. Of course, from the viewpoint of standardizing the materials used and yielding, the width of the horizontally attached unbonded material 43 may be the same as the width of the long unbonded material 42.

[0042] In this configuration, two horizontally attached unbonded material 43 are required, located on the shorter side of the projection 25. The unbonded material 4B is arranged continuously from one joint 22 side to the other joint 22 side of the core material 2. When attaching the unbonded material 4B, the horizontally attached unbonded material 43 can be attached to the plate-like body 21 first, and then the long unbonded material 42 can be extended from the edge of the horizontally attached unbonded material 43 towards the joint 22 side and attached. However, other attachment methods can also be used.

[0043] (Embodiment 4) Other embodiments of this invention will be described below with reference to Figure 4(C). Components similar to those in Embodiment 1 are denoted by the same reference numerals and their descriptions are omitted. The buckling-restrained brace 1 of this embodiment includes an unbonded material 4C. This unbonded material 4C has a narrow width that does not reach the edge of the plate-like body 21 in the short-side direction, is located on the short-side central side of the plate-like body 21, and has a spaced portion 4c at the location of the projection 25 to avoid the weld bead 25a of the projection 25.

[0044] The unbonded material 4C is formed by two horizontally attached unbonded materials 44 that have a length longer than the length of the projection 25 in the long-side direction and are located on the short-side side of the projection 25, and a long unbonded material 42 whose one end is sandwiched from the short-side direction by the two horizontally attached unbonded materials 44 and whose other end extends toward the joint 22. In this example, the width of the horizontally attached unbonded material 44 is about half the width of the long unbonded material 42. Of course, from the viewpoint of standardizing the materials used and yielding, the width of the horizontally attached unbonded material 44 may be the same as the width of the long unbonded material 42.

[0045] In this configuration, two horizontally attached unbonded material 44 are required, located on the shorter side of the projection 25. The unbonded material 4C is arranged continuously from one joint 22 side to the other joint 22 side of the core material 2, and a portion of it is arranged adjacent to each other on the plate-like body 21. When attaching the unbonded material 4C, the horizontally attached unbonded material 44 can be attached to the plate-like body 21 first, and then the long unbonded material 42 can be extended from the edge of the horizontally attached unbonded material 44 towards the joint 22 side and attached. However, other attachment methods can also be used.

[0046] (Embodiment 5) Other embodiments of the present invention will be described below with reference to Figures 5(A) and 5(B). Components similar to those in Embodiment 1 are denoted by the same reference numerals and their descriptions are omitted. The buckling-restrained brace 1 of this embodiment includes an unbonded material 4D. This unbonded material 4D has a narrow width that does not reach the edge of the plate-like body 21 in the short-side direction, is located near the center of the plate-like body 21 in the short-side direction, and has a projection 25 and a spaced portion 4c to avoid the weld bead 25a.

[0047] The unbonded material 4D has a length extending from one joint 22 side to the other joint 22 side of the core material 2, and consists of two continuous unbonded materials 45 that are spaced apart from each other in the short-side direction at least where the projection 25 is located, forming a separated portion 4c. This arrangement requires two continuous unbonded materials 45, but the formation of the separated portion 4c is relatively easy.

[0048] In the configuration shown in Figure 5(A), the two continuous unbonded materials 45 are attached diagonally so that they are further apart from each other as they approach the projection 25, while in the configuration shown in Figure 5(B), the two continuous unbonded materials 45 are attached parallel to each other.

[0049] (Embodiment 6) Other embodiments of this invention will be described below with reference to Figure 6. Components similar to those in Embodiment 1 are denoted by the same reference numerals and their descriptions are omitted. The buckling-restrained brace 1 of this embodiment includes an unbonded material 4E. This unbonded material 4E has a narrow width that does not reach the edge of the plate-like body 21 in the short-side direction, is located on the short-side central side of the plate-like body 21, and has a spaced portion 4c to avoid the projection 25 and the weld bead 25a. However, this unbonded material 4E is not present on the short-side side of the projection 25. This unbonded material 4E corresponds to the configuration of Embodiment 3 in which the two side-mounted unbonded materials 43 are omitted.

[0050] In the above example, the restraining member 3 was configured using a hardened member 32, but the configuration is not limited to this; a square steel pipe can also be used as the restraining member.

[0051] Although embodiments of this invention have been described above with reference to the drawings, this invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as this invention, or within the equivalent scope. [Explanation of symbols]

[0052] 1: Buckling-restrained brace 2: Core material 3:Restraint material 4: Unbonded material 4A: Unbonded material 4B: Unbonded material 4C: Unbonded material 4D: Unbonded material 4E: Unbonded material 4a: Slit (insertion part) 4b: Opening (insertion part) 4c: Separation part 21: Plate-like body 22: Joint 22a: Extension part 22b: Plate piece 25:Protrusion 25a: Weld bead 31: Box-shaped member 31a: Wall part 31b: Recessed part 32: Hardened member 33: Receiving recess 35: Rod-shaped spacer 41: Short unbonded lumber 42: Long unbonded lumber 43: Side-mounted unbonded material 44: Side-mounted unbonded material 45: Continuous unbonded material

Claims

1. A buckling-restraining brace comprising: a core material having joints at both ends in the long direction of a plate-like body for joining with other members; restraining members arranged opposite each face of the plate-like body perpendicular to the weak axis direction; an unbonded material located between the core material and the restraining members, between one joint and the other joint of the core material; and projections protruding from each face of the plate-like body and fitting into receiving recesses formed on the restraining member side to prevent the restraining member from shifting, The buckling-restrained brace is characterized in that the unbonded material has a narrow width that does not reach the edge in the short-side direction of the plate-like body, is located near the center in the short-side direction of the plate-like body, has an insertion portion for positioning to avoid the projection and the weld bead on the base side of the projection, has a length from one joint side to the other joint side of the core material, and consists of one continuous unbonded material having the insertion portion.

2. A buckling-restraining brace comprising: a core material having joints at both ends in the long direction of a plate-like body for joining with other members; restraining members arranged opposite each face of the plate-like body perpendicular to the weak axis direction; an unbonded material located between the core material and the restraining members, between one joint and the other joint of the core material; and projections protruding from each face of the plate-like body and fitting into receiving recesses formed on the restraining member side to prevent the restraining member from shifting, The buckling-restrained brace is characterized by comprising: a short unbonded material having a narrow width that does not reach the edge in the short-side direction of the plate-like body, located near the center in the short-side direction of the plate-like body, having an insertion portion for positioning to avoid the projection and the weld bead on the base side of the projection, and also located on the short-side side of the projection; and a long unbonded material extending from the end side of the short unbonded material toward the joint.

3. A buckling-restraining brace comprising: a core material having joints at both ends in the long direction of a plate-like body for joining with other members; restraining members arranged opposite each face of the plate-like body perpendicular to the weak axis direction; an unbonded material located between the core material and the restraining members, between one joint and the other joint of the core material; and projections protruding from each face of the plate-like body and fitting into receiving recesses formed on the restraining member side to prevent the restraining member from shifting, The buckling-restrained brace is characterized by comprising: two side-mounted unbonded materials that have a narrow width not reaching the edge in the short-side direction of the plate-like body and are located closer to the center in the short-side direction of the plate-like body, and have a length approximately the same as the length of the projection in the long-side direction and are located on the short-side side of the projection in order to form a spaced portion to avoid the projection and the weld bead on the base side of the projection; and a long unbonded material extending from the end side of the side-mounted unbonded materials toward the joint side.

4. A buckling-restraining brace comprising: a core material having joints at both ends in the long direction of a plate-like body for joining with other members; restraining members arranged opposite each face of the plate-like body perpendicular to the weak axis direction; an unbonded material located between the core material and the restraining members, between one joint and the other joint of the core material; and projections protruding from each face of the plate-like body and fitting into receiving recesses formed on the restraining member side to prevent the restraining member from shifting, The buckling-restrained brace is characterized by comprising: two side-attached unbonded materials positioned on the side of the projection in the short-side direction of the projection, having a length longer than the length of the projection in the long-side direction and positioned on the short-side side of the projection, in order to form a spaced portion that avoids the projection and the weld bead on the base side of the projection; and a long unbonded material whose one end is sandwiched from the short-side direction by the two side-attached unbonded materials and whose other end extends toward the joint.

5. A buckling-restraining brace comprising: a core material having joints at both ends in the long direction of a plate-like body for joining with other members; restraining members arranged opposite each face of the plate-like body perpendicular to the weak axis direction; an unbonded material located between the core material and the restraining members, between one joint and the other joint of the core material; and projections protruding from each face of the plate-like body and fitting into receiving recesses formed on the restraining member side to prevent the restraining member from shifting, The unbonded material described above has a narrow width that does not reach the edge in the short-side direction of the plate-like body, is located closer to the center in the short-side direction of the plate-like body, and has a spaced portion to avoid the projection and the weld bead on the base side of the projection. Furthermore, the buckling-restrained brace is characterized in that the unbonded material has a length extending from one joint side to the other joint side of the core material, and consists of two continuous unbonded materials having diagonally bonded portions that are spaced apart from each other in the short-side direction as they approach the location where the projection is located, and the spaced portions are formed by this separation.

6. A buckling-restraining brace comprising: a core material having joints at both ends in the long direction of a plate-like body for joining with other members; restraining members arranged opposite each face of the plate-like body perpendicular to the weak axis direction; an unbonded material located between the core material and the restraining members, between one joint and the other joint of the core material; and projections protruding from each face of the plate-like body and fitting into receiving recesses formed on the restraining member side to prevent the restraining member from shifting, The buckling-restrained brace is characterized in that the unbonded material described above has a narrow width that does not reach the edge in the short-side direction of the plate-like body, is located near the center in the short-side direction of the plate-like body, and is divided to form a spaced portion to avoid the projection and the weld bead on the base side of the projection, and is not present on the short-side side of the projection but extends from the vicinity of the projection to one joint side and the other joint side respectively.

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