JP6599925B2 - Brace core material and buckling-restrained brace having the same - Google Patents

Description

  The present invention relates to a brace core material and a buckling-restrained brace including the same.

  Conventionally, in order to improve the earthquake resistance of a building, a buckling restrained brace having a long plate-like brace core has been used. In this type of buckling-restrained brace, when it is necessary to suppress the yield load of the brace core (for example, when providing a buckling-restrained brace corresponding to a wooden building), the cross-sectional area of the brace core is small. Is set.

  Here, if the entire brace core material is formed to be significantly narrower than usual, the pair of buckling restraining members that sandwich the brace core material must also be formed in a special size that is significantly narrower than usual. . Further, if the entire brace core material is formed to be much narrower than usual, it becomes difficult to perform the work of welding the brace core material.

  Therefore, the entire width of the brace core is not formed narrow, but the width of both ends in the longitudinal direction of the brace core remains the standard size, and the portion excluding both ends of the brace core is narrow. It is generally performed (see Patent Document 1 etc.).

JP2015-105482A

  As described above, when only a part of the long plate-like brace core material is provided with a narrow width, there is a gap between the narrow portion and the buckling restraining member. In order to fill this gap, it is necessary to prepare and arrange a spacer corresponding to the shape of the gap, which complicates the structure and the assembly process.

  An object of this invention is to propose the brace core material which can set a yield load freely with a simple structure, and a buckling restraint brace provided with the same.

  A brace core material according to an embodiment of the present invention includes a core material body and a slit structure formed in the core material body. The core body is a long plate-like member having three directions orthogonal to each other as a length direction, a width direction, and a thickness direction. The slit structure is formed so as to penetrate in the thickness direction at both side portions of the core main body located on both sides of the central portion in the length direction.

  A buckling restrained brace according to an aspect of the present invention includes: the brace core material; a first buckling restraint member disposed along a first surface in the thickness direction of the brace core material; and the brace core material. A second buckling restraining member disposed along the second surface in the thickness direction. The first buckling restraining member and the second buckling restraining member are coupled to each other with the brace core material sandwiched in the thickness direction.

  ADVANTAGE OF THE INVENTION According to this invention, the brace core material which can set a yield load freely with a simple structure and a buckling restraint brace provided with the same can be proposed.

FIG. 1 is a front view of a buckling restrained brace including the brace core material of the first embodiment. 2 is a cross-sectional view taken along line AA in FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG. 4 is a side view of the buckling restrained brace of the above. FIG. 5 is a front view of the brace core material of the above. FIG. 6 is a front view of the brace core material of the second embodiment.

[First embodiment]
The brace core material 8 of 1st embodiment and the buckling restraint brace 9 provided with this are demonstrated based on an accompanying drawing.

  First, the whole structure of the buckling restraint brace 9 provided with the brace core material 8 of 1st embodiment is demonstrated based on FIGS.

  The buckling restraint brace 9 includes a brace core member 8 formed entirely in a plate shape, a first buckling restraint member 1 that is a long metal member, and a second buckling restraint that is a long metal member. A member 2 is provided.

  The brace core material 8 is made of, for example, steel such as carbon steel, stainless steel, or alloy steel, but the material of the brace core material 8 is not particularly limited, and may be formed of other materials such as aluminum.

  The length direction D1, the width direction D2, and the thickness direction D3 of the brace core material 8 which is a long plate shape are three directions orthogonal to each other. Below, each structure of the buckling restraint brace 9 is demonstrated using these directions D1, D2, and D3.

  The length direction D1 is a direction in which the brace core material 8 has the longest dimension, and the thickness direction D3 is a direction in which the brace core material 8 has the shortest dimension. The width direction D2 is a direction orthogonal to the length direction D1 and the thickness direction D3. The brace core material 8 has a first surface 81 and a second surface 82 that face opposite sides in the thickness direction D3 (see FIGS. 2 and 3).

  A pair of fixing pieces 83 are fixed to one end of the brace core material 8 in the length direction D1. The pair of fixed pieces 83 are located at a distance from each other in the width direction D2. The pair of fixed pieces 83 are parts connected to structures (not shown) such as pillars and beams of the building.

  Further, reinforcing members 85 are fixed to both ends of the first surface 81 of the brace core material 8 in the length direction D1. The reinforcing material 85 is fixed to an intermediate portion of the brace core material 8 in the width direction D2. The brace core material 8 and the reinforcing material 85 are coupled to each other so as to form a T shape. A more specific structure of the brace core material 8 will be described later.

  The first buckling restraining member 1 is a square metal cylinder 10 formed into a square cylinder shape using carbon steel, stainless steel, alloy steel, aluminum, or the like (see FIGS. 2 and 3).

  The rectangular metal cylinder 10 has a flat first buckling restraining surface 11 that abuts the first surface 81 of the brace core member 8 over substantially the entire length in the length direction D1.

  The second buckling restraining member 2 is a U-shaped grooved metal material 20 formed using carbon steel, stainless steel, alloy steel, aluminum, or the like (see FIGS. 2 and 3).

  The grooved metal member 20 has a flat second buckling restraining surface 22 that abuts the second surface 82 of the brace core member 8 over substantially the entire length in the length direction D1.

  The grooved metal material 20 includes a web 205 having a long plate shape and a pair of flanges 207 projecting from both end edges in the width direction D2 of the web 205 to the same side in the thickness direction D3. Of the two surfaces in the thickness direction D3 of the web 205, the surface facing the side from which the flange 207 projects is the second buckling restraint surface 22. The second buckling restraint surface 22 is configured to restrain the buckling of the brace core 8 in cooperation with the first buckling restraint surface 11 of the square metal tube 10.

  The dimensions of the rectangular metal cylinder 10 and the grooved metal material 20 in the length direction D1 are the same. The same wording used in the text includes almost the same case. The dimension in the length direction D1 of the brace core material 8 is set longer than the dimension in the length direction D1 of the square metal tube 10 and the grooved metal material 20 by a predetermined dimension.

  In a state where the brace core material 8 is coupled to the square metal tube 10 and the grooved metal material 20, both ends of the brace core material 8 in the length direction D <b> 1 are more than the square metal tube 10 and the grooved metal material 20. , Projecting outside the length direction D1.

  The square metal cylinder 10 and the grooved metal material 20 are joined together by welding. The brace core material 8 is joined to at least one of the square metal tube 10 and the groove metal material 20 by welding. The brace core material 8 is movable relative to the square metal tube 10 and the groove metal material 20 except at the welded portion.

  Next, a more specific configuration of the brace core material 8 of the first embodiment will be described based on FIG.

  The brace core material 8 of the first embodiment includes a long plate-shaped core material body 5 constituting the main body of the brace core material 8 and a slit structure 6 formed in the core material body 5. The length direction D1, the width direction D2, and the thickness direction D3 of the core body 5 coincide with those of the brace core 8.

  The slit structure 6 is formed to penetrate the core body 5 in the thickness direction D3 by slit processing using a laser or the like. The slit structure 6 is not formed in the central portion 51 of the core body 5 in the length direction D1.

  The slit structure 6 is formed in the portions 52 on both sides located with the central portion 51 in the length direction D1 of the core body 5 interposed therebetween. The slit structure 6 has an axisymmetric shape with a virtual line L1 passing through the central portion 51 and extending in the width direction D2 as the center. Below, the structure formed in the part 52 of one side among the slit structures 6 is demonstrated.

  The portion 52 of the core body 5 is provided with a pair of slits 61 formed in parallel to each other and a pair of cutout grooves 63 cut out so as to be connected to each of the pair of slits 61.

  The pair of slits 61 are formed in a straight line along the length direction D1 at positions spaced from each other in the width direction D2. Each slit 61 is parallel to the edges 55 on both sides in the width direction D2 of the core body 5.

  Out of the end portions 615 on both sides in the length direction D <b> 1 of each slit 61, the end portion 615 far from the central portion 51 is at a position connected to the notch groove 63.

  The pair of cutout grooves 63 are cut out from the end edges 55 on both sides of the corresponding portion 52 toward the inside in the width direction D2. Each notch groove 63 is notched so as to be connected to a part (end portion 615) of the slit 61 on the near side of the pair of slits 61.

  Each notch groove 63 is notched in a trapezoidal shape as viewed from the thickness direction D3 so as to have a predetermined opening width in the length direction D1. Each notch groove 63 is formed so that the opening width in the length direction D1 becomes smaller as the position is located inside the width direction D2. Of each notch groove 63, the position located on the innermost side in the width direction D <b> 2 is connected to the slit 61. The opening width in the length direction D1 of each notch groove 63 is set so as to allow expansion and contraction in the length direction D1 of the core body 5.

  In the core body 5, the slit structure 6 is not formed at both end portions 53 in the length direction D <b> 1. Both end portions 53 are located further outside in the length direction D1 than the portions 52 on both sides of the core body 5. A reinforcing member 85 is fixed to both end portions 53, and a pair of fixing pieces 83 are fixed to one end portion 53.

  That is, the core body 5 that forms the main body of the brace core material 8 of the first embodiment is provided with a central portion 51 that is not slitted at the center in the length direction D1 and sandwiches the central portion 51 therebetween. A narrow portion 56 between the pair of slits 61 and a long portion 57 positioned on the outer side in the width direction D2 with the slits 61 interposed between the narrow portions 56 are provided on both side portions 52, respectively. . The narrow portion 56 is integrally continuous with the adjacent central portion 51 and the end portion 53. The long portion 57 is integrally continuous with the central portion 51, and is separated from the adjacent end portion 53 via a notch groove 63.

  The buckling restraint brace 9 of the first embodiment has a structure in which the brace core material 8 having the above-described configuration is sandwiched between the square metal tube 10 and the groove metal material 20 in the thickness direction D3, and therefore requires a complicated structure. The yield load can be set freely.

  That is, in the brace core material 8 of the first embodiment, a narrow portion 56 (a pair of the brace core material 8) that exhibits a substantial function as the brace core material 8 by slitting the long plate-shaped core material body 5. The section between the slits 61) can be freely set. For example, the yield load of the brace core material 8 can be suppressed as the distance between the pair of slits 61 is set smaller.

  In addition, in the brace core material 8 of the first embodiment, since it is not necessary to provide the outer shape of the brace core material 8 in order to suppress the yield load, the first seat as in the conventional buckling-restrained brace. There is no need to further dispose a spacer between the bending restraining member 1 and the second buckling restraining member 2.

  In other words, in the brace core material 8 of the first embodiment, the elongated portion 57 formed between each end edge 55 in the width direction D2 of the core material body 5 and the slit 61 on the side close thereto is substantially Function as a spacer. Therefore, the assembly process of the buckling restrained brace 9 can be simplified.

  In addition, in the brace core material 8 of the first embodiment, welding to at least one of the first buckling restraining member 1 and the second buckling restraining member 2 can be performed with simple work and high reliability. .

  That is, according to the brace core material 8 of the first embodiment, the narrow portion 56 is not welded, but the central portion 51 integrally connected to the narrow portion 56 and the narrow portion 56 are also continuously integrated. Since it is only necessary to perform welding on the long portions 57 at both ends, it is easy to perform the welding operation and the welding is performed more reliably.

  Moreover, the first buckling restraining member 1 and the second buckling restraining member 2 are related to the structure of the slit structure 6 of the brace core material 8 (or whether the slit structure 6 is provided). Instead, a common member can be used, and the member can be shared.

  Further, regardless of the structure of the slit structure 6 of the brace core 8 (or whether or not the slit structure 6 is provided), the buckling restrained brace 9 can be assembled by a common welding operation, The assembly work can be shared.

[Second Embodiment]
The brace core material 8 of the second embodiment will be described below. In addition, about the structure similar to the structure already demonstrated in 1st embodiment among the structures of the brace core material 8 of 2nd embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 6, the slit structure 6 provided in the brace core material 8 of the second embodiment is formed in parallel to each other in each of the portions 52 on both sides of the central portion 51 of the long plate-like core material body 5. And a communication groove 65 formed to connect the pair of slits 61 to each other.

  The communication groove 65 is formed so as to connect the end portions 615 on the side farther from the central portion 51 among the pair of slits 61 positioned at a distance in the width direction D2.

  The communication groove 65 has a predetermined opening width in the length direction D1. The communication groove 65 as a whole has a shape curved in an arc shape so as to swell toward the outside in the length direction D1 when viewed from the thickness direction D3. The opening width of the communication groove 65 in the length direction D1 is set so as to allow expansion and contraction of the core body 5 in the length direction D1.

  In the brace core material 8 of the second embodiment, the narrow portion 58 formed between each edge 55 in the width direction D2 of the core body 5 and the slit 61 on the side close thereto is the brace core material 8. As a substantial function. The long portion 59 between the pair of slits 61 functions as a substantial spacer.

  The narrow portions 58 located on both sides in the width direction D <b> 2 are integrally continuous with the adjacent central portion 51 and the end portion 53. The long portion 59 located at the center in the width direction D2 is integrally continuous with the central portion 51, and is separated from the adjacent end portion 53 via the communication groove 65.

  That is, the core material body 5 that forms the main body of the brace core material 8 of the second embodiment is provided with a central portion 51 that is not slitted at the center in the length direction D1 and sandwiches the central portion 51 therebetween. A long portion 59 between the pair of slits 61 and a narrow portion 58 positioned outside the width direction D2 across the slits 61 with respect to the long portion 59 are provided on both side portions 52, respectively. .

  The elongated portion 59 is integrally continuous with the central portion 51, and is separated from the adjacent end portion 53 via a communication groove 65. The narrow portion 58 is integrally continuous with the adjacent central portion 51 and the end portion 53.

  When assembling the buckling restraint brace 9 using the brace core material 8 of the second embodiment, the first buckling restraint member 1 and the second buckling restraint member 2 with respect to the central portion 51 of the core body 5. Weld at least one of them. As the first buckling restraining member 1 and the second buckling restraining member 2 used here, the structure of the slit structure 6 of the brace core material 8 (or whether or not the slit structure 6 is provided) is used. Regardless, a common member can be used, and the member and the assembly work can be shared.

[Modification]
The above-described configurations of the brace core material 8 and the buckling restrained brace 9 including the same are merely examples, and appropriate design changes can be made.

  For example, in the brace core material 8 of the first embodiment, the notch groove 63 is cut out so as to be connected to the end 615 of the corresponding slit 61, but is connected to the other part of the corresponding slit 61. It may be cut out.

  In the brace core 8 according to the second embodiment, the communication groove 65 is formed so as to connect the end portions 615 on the side far from the central portion 51 among the pair of slits 61 arranged in parallel to each other. The other portions (for example, end portions 615 on the side close to the central portion 51) may be connected to each other.

  Even in other configurations, appropriate design changes can be made without departing from the scope of problem solving.

[effect]
As described above, as described in the first embodiment and the second embodiment, the brace core material (8) includes the core material body (5) and the slit structure (6) formed in the core material body (5). .

  The core body (5) is a long plate-shaped member having three directions orthogonal to each other as a length direction (D1), a width direction (D2), and a thickness direction (D3).

  The slit structure (6) penetrates in the thickness direction (D3) in the core body (5) at both side portions (52) located across the central portion (51) in the length direction (D1). Is formed.

  Therefore, according to the brace core material (8) having the above-described configuration, the core material body (5) is a standardized size, and the slit structure (6) to be processed into the core material body (5) is set. Based on this, the yield load can be set freely. Regardless of the setting of the slit structure (6), the outer shape of the core body (5) is substantially uniform, so that a common member (first buckling restraining member (1) can be used without providing a separate spacer as in the prior art. ), The second buckling restraining member (2), etc.) can be used to assemble the buckling restraining brace (9). The brace core material (8) can be welded at the central portion (51) of the core material body (5) regardless of the setting of the slit structure (6).

  As described in the first embodiment, the slit structure (6) includes a pair of slits formed in parallel to each other at a distance in the width direction (D2) in each of the portions (52) on both sides. (61) and the slits (61) on the closer side of the pair of slits (61) from each edge (55) in the width direction (D2) of the core body (5) in each of the portions (52) on both sides. It is preferable to include a notch groove (63) that is notched so as to be connected to.

  In this case, the narrow part (56) formed between the pair of slits (61) in the core body (5) exhibits a substantial function as the brace core (8). The long part (57) located outside the slit (61) with respect to the part (56) functions as a substantial spacer. The yield load as the brace core material (8) is freely set according to the distance between the pair of slits (61).

  In addition, as described in the first embodiment, the notch groove (63) is preferably configured to allow expansion and contraction in the length direction (D1) of the core body (5).

  In this case, at the time of slit processing, a portion corresponding to the notch groove (63) in the core body (5) may be scraped off with a predetermined width using a laser or the like, and the processing is easy.

  Further, as described in the second embodiment, the slit structure (6) includes a pair of slits formed in parallel to each other at a distance in the width direction (D2) in each of the portions (52) on both sides. It is also preferable to include a communication groove (65) formed so as to connect a part of the pair of slits (61) in each of (61) and the portions (52) on both sides.

  In this case, the long part (59) formed between the pair of slits (61) in the core body (5) functions as a substantial spacer, and the long part (59) The narrow portion (58) located on the outside with the slit (61) in between exhibits a substantial function as the brace core material (8). The yield load as the brace core material (8) is freely set according to the distance between the pair of slits (61).

  Moreover, as described in the second embodiment, the communication groove (65) is preferably configured to allow expansion and contraction in the length direction (D1) of the core body (5).

  In this case, at the time of slit processing, a portion corresponding to the communication groove (65) in the core body (5) may be scraped off with a predetermined width using a laser or the like, and the processing is easy.

  Further, as described in the first embodiment and the second embodiment, the buckling-restrained brace (9) includes the brace core material (8) and the thickness direction (D3) of the brace core material (8). The first buckling restraining member (1) disposed along the one surface (81) and the second seat disposed along the second surface (82) in the thickness direction (D3) of the brace core (8). A buckling restraining member (2) is provided, and the first buckling restraining member (1) and the second buckling restraining member (2) are coupled to each other with the brace core (8) sandwiched in the thickness direction (D3). Has been.

  Therefore, according to the buckling restraint brace (9) having the above-described configuration, various yield loads can be freely set with a simple structure using the brace core material (8).

DESCRIPTION OF SYMBOLS 1 1st buckling restraint member 2 2nd buckling restraint member 5 Core material main body 51 Center part 52 Part 55 Edge 6 Slit structure 61 Slit 63 Notch groove 65 Communication groove 8 Brace core material 81 1st surface 82 2nd surface 9 Buckling restraint brace D1 Length direction D2 Width direction D3 Thickness direction

Claims (3)

A core body,
A slit structure formed in the core material body,
The core body is
It is a long plate-shaped member having three directions orthogonal to each other as a length direction, a width direction and a thickness direction,
The slit structure is
Of the core material body, in both side parts located across the central part in the length direction, it is formed so as to penetrate in the thickness direction ,
A pair of slits formed in parallel to each other at a distance in the width direction in each of the portions on both sides,
A brace core material including a communication groove formed so as to connect a part of the pair of slits in each of the portions on both sides . The communication groove is
The core body is configured to allow expansion and contraction in the length direction.
The brace core material according to claim 1. The brace core material according to claim 1 or 2,
A first buckling restraining member disposed along the first surface in the thickness direction of the brace core material;
A second buckling restraining member disposed along the second surface in the thickness direction of the brace core material,
The first buckling restraining member and the second buckling restraining member are coupled to each other with the brace core material sandwiched in the thickness direction.
A buckling restrained brace characterized by that.

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