Braces

Abstract

To provide a brace that can be easily configured in various forms. [Solution] The brace 1 is attached to a frame formed by beams and columns, and has a pair of mounting portions 11 located at both longitudinal ends of the brace 1, a central portion 12 located between the pair of mounting portions 11 and continuous with the pair of mounting portions 11, and a welded portion 14 that joins at least one of the pair of mounting portions 11 to the central portion 12 by welding.

Description

[Technical field]

[0001] The present disclosure relates to a brace. [Background technology]

[0002] Braces have been used as reinforcing materials for structures, as disclosed in Patent Document 1. A brace is equipped with a core material, both ends of which are attached to the structure and serve as an axial force member that receives axial force, and a tubular restraining member that covers the core material with both ends of the core material protruding. The use of braces improves the earthquake resistance and vibration control performance of buildings. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7285998 Summary of the Invention [Problem to be solved by the invention]

[0004] The axial force member is composed of a single piece. When the brace is a buckling restrained brace as in Patent Document 1, if the core material (axial force member) is a single piece, the restraint member must be set to a size that allows the mounting portion of the core material to be inserted, which results in a large restraint member. Furthermore, for example, when constructing a brace using a tubular axial force tube as an axial force member, it is necessary to form an attachment portion at the end of the axial force tube, which makes processing of the end difficult. There is a demand for braces that can be easily configured in a variety of configurations.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide a brace that can be easily configured in various forms. [Means for solving the problem]

[0006] A brace according to one aspect of the present disclosure is a brace that is attached to a frame formed of beams and columns, and includes a pair of mounting portions located at both longitudinal ends of the brace, a central portion located between the pair of mounting portions and continuous with the pair of mounting portions, and a weld portion that joins at least one of the pair of mounting portions to the central portion by welding. Effect of the Invention

[0007] According to one aspect of the present disclosure, a brace that can be easily configured in various forms can be provided. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a front view of a brace according to one embodiment. [Diagram 2] FIG. 4 is a diagram showing a core material side welded portion according to one embodiment. [Diagram 3] FIG. 2 is an enlarged view of part A shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a brace 1 according to an embodiment of the present disclosure will be described with reference to FIGS. The brace 1 is attached to a framework formed by columns and beams in a structure and is used to reinforce the structure. In this embodiment, the brace 1 is a buckling restrained brace.

[0010] FIG. 1 is a front view of a brace 1 according to this embodiment. As shown in Fig. 1, the brace 1 includes a core material 10, a secondary core material 20, a restraining member 30, and a filling material 40. In Fig. 1, the restraining member 30 is indicated by a dashed line.

[0011] The core material 10 is an elongated member. The core material 10 is formed in a plate shape. The core material 10 is made of, for example, a steel plate. The core material 10 has a pair of mounting portions 11 and a central portion 12. The pair of mounting portions 11 and the central portion 12 are joined to form a single core material 10. The core material 10 is an axial force member that receives an axial force.

[0012] The pair of mounting portions 11 are located at both ends in the longitudinal direction of the brace 1. Connecting members (not shown) are attached to the pair of mounting portions 11. The pair of mounting portions 11 are attached to the framework of a structure via the connecting members.

[0013] The central portion 12 is located between the pair of mounting portions 11 in the longitudinal direction. The central portion 12 is continuous with the pair of mounting portions 11. The pair of mounting portions 11 and the central portion 12 are joined by groove welding. That is, a core material side weld portion 14 (weld portion) which is a groove weld portion is formed between the pair of mounting portions 11 and the central portion 12. As the core material side weld portion 14, a first core material side groove weld portion 14A (first groove weld portion) which joins one of the pair of mounting portions 11 and the central portion 12, and a second core material side groove weld portion 14B (second groove weld portion) which joins the other of the pair of mounting portions 11 and the central portion 12 are formed.

[0014] The central portion 12 includes a plasticized portion 12a, a wide portion 12b, and an enlarged portion 12c. In this embodiment, the central portion 12 is formed of a continuous, integral material (specifically, a single flat plate). The central portion 12 including the plasticized portion 12a does not include a welded portion.

[0015] The plasticized portion 12a is located at the center in the longitudinal direction of the central portion 12. The cross-sectional shape of the plasticized portion 12a perpendicular to the longitudinal direction is constant throughout the longitudinal direction. The wide width portions 12b are located at both longitudinal ends of the central portion 12. The outer longitudinal ends of the wide width portions 12b are joined to the attachment portion 11.

[0016] In the following description, the area of ​​a cross section perpendicular to the longitudinal direction in any part of the core material 10 and the secondary core material 20 is referred to as the cross-sectional area of ​​the part. In the central part 12, the cross-sectional area of ​​the plasticized part 12a is smaller than the cross-sectional area of ​​the wide part 12b. Specifically, the thickness of the plasticized part 12a is the same as the thickness of the wide part 12b, and the width of the plasticized part 12a is smaller than the width of the wide part 12b. By providing such a shape, when an axial compressive load is applied to the core material 10, the plasticized part 12a is deformed before other parts of the core material 10, and it is possible to suppress deformation of parts other than the plasticized part 12a. In other words, the center of the core material 10 in the longitudinal direction (i.e., the plasticized part 12a) becomes a region that is easily plasticized, and the plasticized region is limited to the center.

[0017] The enlarged portion 12c is a boundary region between the wide portion 12b and the plasticized portion 12a. The enlarged portion 12c is adjacent to both sides of the plasticized portion 12a in the longitudinal direction. The cross-sectional area of ​​the enlarged portion 12c changes so as to expand from the plasticized portion 12a side to the wide portion 12b side. Specifically, the plate thickness of the enlarged portion 12c is the same as the plate thickness of the plasticized portion 12a, and the width direction length of the enlarged portion 12c changes so as to become larger from the plasticized portion 12a side toward the wide portion 12b side. The enlarged portion 12c absorbs, for example, an additional bending moment acting on the core material 10.

[0018] 2, the core-side welded portion 14 formed between the mounting portion 11 and the central portion 12 will be described. A first groove B1 is formed at the longitudinal inward end of the mounting portion 11, and a second groove B2 is formed at the longitudinal end of the central portion 12. Note that a groove may be formed at only one of the longitudinal inward end of the mounting portion 11 and the longitudinal end of the central portion 12, and no groove may be formed at the other.

[0019] In the core material side weld 14 (first core material side groove weld 14A, second core material side groove weld 14B), the first bevel angle θ1 (i.e., the bevel angle of the first groove B1) which is the bevel angle on the mounting portion 11 side is different from the second bevel angle θ2 (i.e., the bevel angle of the second groove B2) which is the bevel angle on the central portion 12 side. For example, the difference between the first bevel angle θ1 and the second bevel angle θ2 with respect to the first bevel angle θ1 is ±5% or more. In the illustrated example, the first bevel angle θ1 is smaller than the second bevel angle θ2. Note that the first bevel angle θ1 may be larger than the second bevel angle θ2. Although detailed illustration is omitted, the first bevel angle θ1 of the first core material side groove weld 14A and the second core material side groove weld 14B is the same angle. The second bevel angle θ2 of each of the first core material side groove weld portion 14A and the second core material side groove weld portion 14B is the same angle.

[0020] Returning to FIG. 1 , the secondary core material 20 is an elongated member. The secondary core material 20 is formed in a plate shape. The secondary core material 20 is made of, for example, a steel plate. In this embodiment, the secondary core material 20 is provided at both ends of the core material 10. The longitudinal direction of the secondary core material 20 coincides with the longitudinal direction of the core material 10. The longitudinal outer end of the secondary core material 20 coincides with the longitudinal end of the core material 10. The secondary core material 20 reinforces both ends of the core material 10 and prevents the core material 10 from bending in the plate thickness direction.

[0021] The secondary core material 20 is provided on the front and back surfaces at both ends of the core material 10 (i.e., the plate surfaces facing the plate thickness direction at both ends of the core material 10). The secondary core material 20 is provided in an upright position on the plate surface of the core material 10. The secondary core material 20 extends along the plate thickness direction of the core material 10. The core material 10 and the secondary core material 20 have a cross-shaped cross section. The secondary core material 20 is joined to the core material 10 by fillet welding. That is, a fillet weld 23 is formed between the core material 10 and the secondary core material 20.

[0022] The secondary core 20 has a pair of secondary mounting portions 21 and a secondary inner portion 22 . The pair of sub-mounting portions 21 are located at both longitudinal ends of the brace 1. The pair of sub-mounting portions 21 are attached to the framework of a structure via connecting members.

[0023] The sub-inner portion 22 is adjacent to the inner side of the pair of sub-mounting portions 21 in the longitudinal direction. The sub-inner portion 22 has a first portion 22a and a second portion 22b that are arranged spaced apart in the longitudinal direction. The first portion 22a is adjacent to one of the pair of sub-mounting portions 21 on the inner side in the longitudinal direction and is continuous with this sub-mounting portion 21. The second portion 22b is adjacent to the other of the pair of sub-mounting portions 21 on the inner side in the longitudinal direction and is continuous with this sub-mounting portion 21.

[0024] The pair of sub-mounting portions 21 and the sub-inner portion 22 are joined by groove welding. That is, a sub-core material side weld 24 is formed between the sub-mounting portion 21 and the sub-inner portion 22. As the sub-core material side weld 24, a first sub-core material side groove weld 24A that joins one of the pair of sub-mounting portions 21 to the first portion 22a and a second sub-core material side groove weld 24B that joins the other of the pair of sub-mounting portions 21 to the second portion 22b are formed.

[0025] Fig. 3 is an enlarged view of part A shown in Fig. 1. As shown in Fig. 3, the secondary mounting portion 21 and the secondary inner portion 22 are groove welded at a connection position corresponding to the position of the core material side weld portion 14 in the longitudinal direction. That is, the secondary core material side weld portion 24 is formed at a position corresponding to the core material side weld portion 14 in the longitudinal direction. The secondary core material 20 has a recessed portion 25 formed in the connection position to prevent contact between the core material side weld portion 14 and the secondary core material 20.

[0026] The restraining member 30 is a tubular member that covers the core material 10 with both ends of the core material 10 protruding. For example, a steel pipe is used for the restraining member 30. The restraining member 30 may be, for example, a square steel pipe or a cylindrical steel pipe.

[0027] The length of the restraining member 30 is shorter than the length along the longitudinal direction of the entire core material 10. The length of the restraining member 30 is longer than the length of the central portion 12. The core material side welded portion 14 and the secondary core material side welded portion 24 are disposed inside the restraining member 30. In this embodiment, the maximum outer dimension of a cross section perpendicular to the longitudinal direction in the mounting portion 11 is larger than the maximum outer dimension of a cross section perpendicular to the longitudinal direction in the restraining member 30.

[0028] Conventionally, the core material is made of a single piece. In this case, the restraining member needs to be set to a size that allows the attachment portion of the core material to be inserted, which results in a large restraining member. In this embodiment, a single core material 10 is formed by joining a pair of attachment portions 11 and a central portion 12. Therefore, the central portion 12 is inserted into the restraining member 30, and then the attachment portion 11 is joined to the central portion 12, so that the restraining member 30 can be inserted into the core material 10. This prevents an increase in the dimensions of the restraining member 30, making it easy to form various shapes.

[0029] The filler 40 is filled between the restraining member 30 and the core material 10. The material of the filler 40 is, for example, concrete or mortar. The core material 10 and the secondary core material 20, the portions of which are disposed inside the restraining member 30, are covered with a covering member (not shown). The covering member prevents the core material 10 and the secondary core material 20 from adhering to each other, and allows the core material 10 and the secondary core material 20 to move relative to the filler 40. As a result, the filler 40 holds the core material 10 so that it can move relative to the restraining member 30 in the longitudinal direction, so that the axial force of the core material 10 is not transmitted to the restraining member 30. The restraining member 30 and the filler 40 restrict deformation of the core material 10 in directions other than the longitudinal direction.

[0030] As described above, the brace 1 of this embodiment comprises a pair of mounting portions 11 located at both longitudinal ends of the brace 1, a central portion 12 located between the pair of mounting portions 11 and continuous with the pair of mounting portions 11, and a core side weld portion 14 that joins at least one of the pair of mounting portions 11 to the central portion 12 by welding. According to the above configuration, the core material 10, which is an axial force member, can be formed by joining at least one of the pair of mounting portions 11 to the central portion 12 by welding, so that a brace 1 can be provided that can be easily configured into various shapes.

[0031] Moreover, the core material side welded portion 14 is a groove welded portion in which the groove is welded. According to the above-mentioned configuration, the joining strength between the attachment portion 11 and the central portion 12 can be ensured.

[0032] The core material side weld 14 includes a first core material side groove weld 14A that joins one of the pair of mounting portions 11 to the central portion 12, and a second core material side groove weld 14B that joins the other of the pair of mounting portions 11 to the central portion 12. In each of the first core material side groove weld 14A and the second core material side groove weld 14B, the first bevel angle θ1 on the central portion 12 side and the second bevel angle θ2 on the mounting portion 11 side are different. The first bevel angle θ1 of the first core material side groove weld 14A and the first bevel angle θ1 of the second core material side groove weld 14B are the same angle, and the second bevel angle θ2 of the first core material side groove weld 14A and the second bevel angle θ2 of the second core material side groove weld 14B are the same angle. According to the above configuration, the first core material side groove weld 14A and the second core material side groove weld 14B are formed symmetrically, thereby preventing load from concentrating on either the first core material side groove weld 14A or the second core material side groove weld 14B.

[0033] The pair of mounting portions 11 and the central portion 12 form a single core material 10. A tubular restraining member 30 is provided which covers the core material 10 with both ends of the core material 10 protruding. The maximum outer dimension of the mounting portion 11 in a cross section perpendicular to the longitudinal direction is larger than the maximum outer dimension of the restraining member 30 in a cross section perpendicular to the longitudinal direction. According to the above-mentioned configuration, an increase in the dimensions of the restraining member 30 can be suppressed, and various configurations can be easily achieved.

[0034] The central portion 12 is formed of a continuous, integral material. The central portion 12 includes a plasticized portion 12a whose cross section perpendicular to the longitudinal direction has a uniform shape in the longitudinal direction, and enlarged portions 12c adjacent to both sides of the plasticized portion 12a in the longitudinal direction and whose cross-sectional area perpendicular to the longitudinal direction changes so as to be larger than that of the plasticized portion 12a. According to the above-mentioned configuration, the central portion 12 including the plasticized portion 12a is formed of a continuous, integral material and does not have a welded portion, so that the axial strength of the core material 10 can be sufficiently exerted against the axial compressive load.

[0035] The core material 10 is formed in a plate shape. A long secondary core material 20 extending in the longitudinal direction is provided in an upright position on the plate surface of the core material 10 with its end on the outer side in the longitudinal direction coinciding with the end of the core material 10. The secondary core material 20 includes a pair of secondary mounting portions 21 located at both ends in the longitudinal direction, and a secondary inner portion 22 adjacent to the pair of secondary mounting portions 21 on the inner side in the longitudinal direction. The pair of secondary mounting portions 21 and the secondary inner portion 22 are groove welded at a connection position corresponding to the position of the core material side weld portion 14 in the longitudinal direction. The secondary core material 20 has a recessed portion 25 formed so as not to come into contact with the core material side weld portion 14 at the connection position. According to the above configuration, the core material 10 can be reinforced by the secondary core material 20. As with the core material 10, the secondary inner portion 22 is inserted into the restraining member 30, and then the secondary mounting portion 21 is welded to the central portion 12, thereby allowing the secondary core material 20 to be inserted into the restraining member 30. This makes it possible to prevent an increase in the dimensions of the restraining member 30. Furthermore, because the secondary core material 20 has the recessed portion 25 formed therein, the mounting portion 11 and the central portion 12 can be easily welded together, even when the secondary core material 20 is provided.

[0036] The present disclosure is not limited to the above-described embodiment described with reference to the drawings, and various modifications are possible within the technical scope of the present disclosure.

[0037] In the above embodiment, the core material 10 is formed by joining a pair of mounting portions 11 and the central portion 12. However, the mounting portions 11 may be formed by further joining two or more members, and the central portion 12 may be formed by further joining two or more members. That is, the core material 10 may be formed, as the core material side weld portion 14, with a mounting portion side weld portion for welding two or more members constituting the mounting portions 11 together, or a central portion side weld portion for welding two or more members constituting the central portion 12 together.

[0038] In the above embodiment, the secondary inner portion 22 has been described as having the first portion 22a and the second portion 22b spaced apart in the longitudinal direction. However, the secondary inner portion 22 may be formed of a single material (one flat plate) that is continuous in the longitudinal direction. In other words, the secondary core material 20 may be formed over the entire longitudinal length of the core material 10.

[0039] In addition, within the scope of the present disclosure, the components in the above-described embodiments may be replaced with well-known components as appropriate, and the above-described modified examples may be combined as appropriate.

[0040] (Additional Note) The brace according to the embodiment can be understood, for example, as follows. <1> A brace according to one aspect of the present disclosure is a brace that is attached to a frame formed of beams and columns, and is characterized in that it comprises a pair of mounting portions located at both longitudinal ends of the brace, a central portion located between the pair of mounting portions and continuous with the pair of mounting portions, and a weld portion that joins at least one of the pair of mounting portions to the central portion by welding.

[0041] According to the above configuration, the axial force member can be formed by joining at least one of the pair of mounting portions and the central portion by welding, so that a brace that can be easily configured in various shapes can be provided.

[0042] <2> the above <1> In the brace according to the above, a configuration may be adopted in which the welded portion is a groove welded portion in which a groove is welded. According to the above configuration, the joining strength between the mounting portion and the central portion can be ensured.

[0043] <3> the above <2> In the brace according to the above, the groove weld may include a first groove weld that joins one of the pair of mounting portions to the central portion, and a second groove weld that joins the other of the pair of mounting portions to the central portion, and in each of the first groove weld and the second groove weld, a first bevel angle on the central portion side and a second bevel angle on the mounting portion side are different, the first bevel angle of the first groove weld and the first bevel angle of the second groove weld are the same angle, and the second bevel angle of the first groove weld and the second bevel angle of the second groove weld may be the same angle. According to the above configuration, the first groove weld and the second groove weld are formed symmetrically, so that it is possible to prevent a load from concentrating on one of the first groove weld and the second groove weld.

[0044] <4> the above <1> from <3> In any one of the embodiments of the brace, a core material is formed by the pair of mounting portions and the central portion, and a tubular restraining member is provided covering the core material with both ends of the core material protruding, and a maximum outer dimension of the mounting portions in a cross section perpendicular to the longitudinal direction may be larger than a maximum outer dimension of the restraining member in a cross section perpendicular to the longitudinal direction. According to the above-mentioned configuration, an increase in the dimensions of the restraining member can be suppressed, and various configurations can be easily realized.

[0045] <5> the above <4> In the brace according to the present invention, a configuration may be adopted in which the central portion is formed of a continuous, integral material, and the central portion includes a plasticized portion whose shape in a cross-section perpendicular to the longitudinal direction is uniform in the longitudinal direction, and enlarged portions adjacent to both sides of the plasticized portion in the longitudinal direction and whose cross-sectional area perpendicular to the longitudinal direction changes to be larger than the cross-sectional area of ​​the plasticized portion perpendicular to the longitudinal direction. According to the above-mentioned configuration, the central portion including the plasticized portion is formed of a continuous, integral material and does not have a welded portion, so that the axial strength of the core material can be sufficiently exerted against the axial compressive load.

[0046] <6> the above <4> or <5> In the brace according to the above, the core material is formed in a plate shape, and a long secondary core material extending in the longitudinal direction is provided in an upright position on the plate surface of the core material with its outer end in the longitudinal direction coinciding with the end of the core material, the secondary core material has a pair of secondary mounting portions located at both ends in the longitudinal direction, and a secondary inner portion adjacent to the pair of secondary mounting portions on the inner side in the longitudinal direction, the pair of secondary mounting portions and the secondary inner portion are groove welded at connection positions corresponding to the positions of the welded portions in the longitudinal direction, and the secondary core material has a recessed portion formed therein so as not to come into contact with the welded portions at the connection positions. According to the above configuration, the core material can be reinforced by the secondary core material. As with the core material, the secondary inner portion is inserted into the restraining member, and then the secondary mounting portion is welded to the center portion, so that the secondary core material can be inserted into the restraining member. This makes it possible to suppress an increase in the dimensions of the restraining member. Furthermore, because the secondary core material has a recessed portion, the mounting portion and the center portion can be easily welded together even when the secondary core material is provided. [Explanation of symbols]

[0047] 1 Brace 10 Core material 11 Mounting part 12 Central part 12a Plasticization part 12b Wide section 12c Enlarged section 14 Core material side welded part (welded part) 14A First core side groove weld (first groove weld) 14B Second core side groove weld (second groove weld) 20 Secondary core material 21 Secondary mounting part 22 Submedial part 30 Restraining member θ1 First bevel angle θ2 Second bevel angle

Claims

1. A brace attached to a frame formed of beams and columns, A pair of mounting portions located at both ends of the brace in the longitudinal direction; a central portion located between the pair of mounting portions and continuous with the pair of mounting portions; a welding portion that joins at least one of the pair of mounting portions and the central portion by welding, The welded portion is a groove welded portion in which a groove is welded, As the groove weld portion, A first groove weld portion joining one of the pair of mounting portions and the central portion; A second groove weld portion joining the other of the pair of mounting portions and the central portion, In each of the first groove weld and the second groove weld, a first bevel angle on the central portion side and a second bevel angle on the attachment portion side are different, The first bevel angle of the first groove weld portion and the first bevel angle of the second groove weld portion are the same angle, and The brace, wherein the second bevel angle of the first groove weld and the second bevel angle of the second groove weld are the same angle.

2. The pair of mounting portions and the central portion form a single core material, a tubular restraining member that covers the core material with both ends of the core material protruding, 2. The brace of claim 1, wherein a maximum outer dimension of the mounting portion in a cross section perpendicular to the longitudinal direction is greater than a maximum outer dimension of the restraining member in a cross section perpendicular to the longitudinal direction.

3. the central portion being formed of a continuous, unitary piece of material; The central portion is a plasticized portion having a shape in a cross section perpendicular to the longitudinal direction that is uniform in the longitudinal direction; an enlarged portion adjacent to both sides of the plasticized portion in the longitudinal direction, the area of ​​a cross section perpendicular to the longitudinal direction being enlarged from the area of ​​a cross section perpendicular to the longitudinal direction of the plasticized portion; 3. The brace of claim 2, further comprising:

4. The core material is formed into a plate shape, a secondary core material having a long shape extending in the longitudinal direction is provided in a state in which the secondary core material is erected on a plate surface of the core material and an end portion on an outer side in the longitudinal direction coincides with an end portion of the core material; The secondary core material is A pair of sub-mounting portions located at both ends in the longitudinal direction; a sub-inner portion adjacent to the pair of sub-mounting portions on the inner side in the longitudinal direction; Equipped with The pair of sub-mounting portions and the sub-inner portion are groove-welded at connection positions corresponding to positions of the welded portions in the longitudinal direction, The brace according to claim 2 , wherein the secondary core material has a recessed portion formed therein so as not to come into contact with the welded portion at the connection position.

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