JP5767522B2 - Buckling restraint brace - Google Patents

Description

  The present invention relates to a buckling restrained brace.

  Conventionally, Patent Document 1 is known as a buckling restrained brace.

  The buckling restraint brace disclosed in Patent Document 1 has a first buckling restraint member made of a long rectangular metal tube fitted on a long plate-like brace core material, and an outer surface of the brace core material. A long second buckling restraining member is interposed between the inner surface of one buckling restraining member.

JP 2008-75281 A

  However, the buckling restraint brace of Patent Document 1 has a constant buckling restraint force in each part in the longitudinal direction, and a buckling restraint force at a place where buckling deformation in the longitudinal direction is concentrated. The configuration was not higher than the bending restraint force.

  For this reason, in order to secure the buckling restraint force at the location where the buckling deformation is concentrated, it is necessary to match the buckling restraining force at the location where the buckling deformation is concentrated at the location where the buckling deformation is concentrated. Increases in weight, making handling difficult and costly.

  Moreover, although the buckling restraint brace is used in several places of a building, the buckling restraint performance calculated | required by the buckling restraint brace differs for every use place.

  In this case, in order to form a buckling restrained brace having a buckling restraint performance required for each use location of a building, conventionally, it is necessary to form multiple types of buckling restrained braces having different member thicknesses. The number of members for forming the buckling restrained brace increases and the cost increases.

  Further, conventionally, since the second buckling restraining member is restrained by the first buckling restraining member made of a rectangular metal tube over the entire length, the long plate-like brace core material and the second buckling restraining member There is a problem that the gap dimension between them cannot be set arbitrarily and the buckling restraint performance cannot be changed.

  Further, conventionally, both end portions in the width direction of the long plate-like brace core are in close proximity to the first buckling restraining member made of a rectangular metal tube, and the in-plane deformation of the brace core is constrained. The outward deformation progresses and the risk of breakage of the brace core increases.

  Further, conventionally, since the brace core is covered with the first buckling restraining member made of a long rectangular metal cylinder, there is a problem that the degree of damage / deformation cannot be visually confirmed.

  The present invention has been invented in view of the above-described conventional problems, and is capable of improving the performance of the buckling restraint brace and achieving the optimum buckling restraint force required at the place of use of the building. In providing braces.

The buckling restraint brace of the present invention includes a long plate-like brace core, a buckling restraint member disposed along substantially the entire length of both sides of the brace core, and the both buckling restraint members. It is composed of a plurality of connecting members that connect each other at an arbitrary plurality of locations in the longitudinal direction, and the arrangement of the plurality of connecting materials is an arrangement in which the vicinity of the end portion in the longitudinal direction is denser than other locations. It is characterized by that.

  Moreover, it is preferable that the both ends of the brace core material in the width direction are located between both ends of the both buckling restraining members in the width direction and are exposed to the outside.

  The present invention improves the performance of the buckling restraint brace using the same member by arbitrarily setting the connection position in the longitudinal direction of both buckling restraint members by the joining material and the dimension between the adjacent joining materials, It is possible to provide a buckling-restrained brace having an optimal buckling-restraining effect that is required at a place where the building is used.

It is a front view of the buckling restraint brace of this invention. It is a top view same as the above. It is an expanded sectional view of the XX line of FIG. 1 same as the above. It is an expanded sectional view of the YY line of FIG. 1 same as the above. It is an expanded sectional view of the ZZ line of FIG. 1 same as the above. It is a front view of other embodiment same as the above. It is a top view same as the above. It is a front view of other embodiment same as the above. It is a top view same as the above. (A) and (b) are the side view and top view which show the example from which a connection material same as the above differs further. (A) (b) is sectional drawing which shows the example from which a connection material same as the above differs.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  1 to 9 show an embodiment of the present invention.

  The buckling restraint brace 1 includes a long plate-like brace core material 2, buckling restraint members 3 and 4 disposed along substantially the entire length of both sides of the brace core material 2, and both bucklings. The restraining members 3 and 4 are constituted by a plurality of connecting members 5 that are connected at arbitrary plural positions in the longitudinal direction.

  The long plate-like brace core material 2 is made of steel such as carbon steel, stainless steel, alloy steel, but is not necessarily limited to this, and is made of other various materials (for example, aluminum). May be. Both ends of the long brace core 2 serve as connection portions 7 for connection to building structural materials (bearing wall frames, columns, beams, etc.).

  Reinforcing members 12 are fixed in parallel to the longitudinal direction at intermediate portions in the width direction of both ends of the brace core material 2 in the longitudinal direction.

  In the embodiment shown in FIGS. 3 to 5, the buckling restraining members 3 and 4 are long U-shaped metal materials in which edge pieces 6 protrude from both end edges of an opening having a U-shaped cross section. It is made of other materials such as stainless steel, alloy steel, or aluminum.

  The length dimension of the buckling restraining members 3 and 4 is a length obtained by subtracting the length dimension of the connecting portion 7 at both ends from the length dimension of the brace core material 2. Further, the width dimension of the buckling restraining members 3 and 4 is slightly longer than the width dimension of the brace core material 2.

  In the embodiment shown in FIGS. 1 to 9, the connecting member 5 is a short metal plate having a narrow width, and is made of steel such as carbon steel, stainless steel, alloy steel, or aluminum.

  The buckling restraining members 3 and 4 are respectively arranged on both surfaces of the brace core material 2 along the longitudinal direction of the brace core material 2, and both the buckling restraining members 3 and 4 are arranged in the longitudinal direction by a plurality of connecting members 5. The buckling restraint brace 1 is configured by connecting the parts.

  In the present embodiment, the connecting member 5 made of a short metal plate having a narrow width is bridged across the side piece 10 of the both buckling restraining members 3 and 4, and fixing means 9 such as bolts, welding, rivets, adhesion, and the like. The two buckling restraining members 3 and 4 are connected by the connecting member 5 by being fixed to the side piece 10.

  The fixing position of the connecting member 5 to the side piece 10 by the fixing means 9 is in the vicinity of the end of the side piece 10 of the buckling restraining members 3 and 4 on the brace core member 2 side, and the dimension m in FIG. preferable.

  That is, since the bending deformation of the brace core material 2 is borne by the buckling restraining members 3 and 4, bending stress acts on the buckling restraining members 3 and 4, and the bending edge of the buckling restraining members 3 and 4 ( That is, when the connecting member 5 is fixed to the side piece 10 by the fixing means 9 in the vicinity of the side piece 10 near the end of the brace core 2, a large bending stress acts on the connecting member 5 and the fixing means 9.

  However, as described above, the position where the connecting member 5 is fixed to the side piece 10 by the fixing means 9 is set near the end of the side piece 10 of the buckling restraining members 3 and 4 on the brace core 2 side. It is fixed near the center in the deformation direction, the dimension m is shortened, and a large bending stress does not act on the connecting material 5 and the fixing means 9. For this reason, the strength of the material constituting the connecting member 5 and the fixing means 9 can be reduced, and a rational buckling restrained brace 1 can be provided.

  In the buckling restraint brace 1 assembled and constructed in this way, the connecting portions 7 at both ends in the longitudinal direction of the brace core member 2 protrude from both ends in the longitudinal direction of both buckling restraining members 3 and 4. Further, the rear end portions of the reinforcing material 12 provided at both ends in the longitudinal direction of the brace core material 2 are positioned between the edge pieces 6 of the buckling restraining members 3 and 4, and the front end portion of the reinforcing material 12 is the buckling restraining member. It protrudes from the ends in the longitudinal direction of 3 and 4.

  Moreover, the both ends of the width direction of both buckling restraining members 3 and 4 are located so that it may protrude a little outward from the both ends of the width direction of the brace core material 2. Further, the edge pieces 6 of the both buckling restraining members 3 and 4 are respectively close to and opposed to both surfaces of the brace core material 2.

  When the two buckling restraining members 3 and 4 are connected to each other by a connecting member 5 at a plurality of positions in the longitudinal direction, the buckling performance of the buckling restraining brace 1 to be formed becomes the desired buckling performance. The connection positions of the plurality of connecting members 5 in the direction, the number of connecting members 5 and the dimensions between adjacent connecting members 5 are set.

  That is, the buckling restraint brace 1 is ideal to cause buckling restraint of the same wavelength in the entire length in the longitudinal direction, but generally buckling deformation is concentrated in the vicinity of the connecting portion 7 at the end in the longitudinal direction. Accordingly, as shown in FIGS. 1 and 2, the vicinity of the end in the longitudinal direction where buckling deformation is concentrated is connected by the connecting material 5, and the connecting material 5 is closely arranged near the end in the longitudinal direction. Connect. That is, in the vicinity of the end portion in the longitudinal direction, the length dimension between the connecting members 5 adjacent to each other in the longitudinal direction is shortened.

  By doing so, the buckling restraint effect that increases the buckling restraint effect in the vicinity of the end in the longitudinal direction where buckling deformation is concentrated, can cause buckling deformation at an ideal wavelength, and can enhance the energy absorption effect. The brace 1 can be formed.

  Moreover, the buckling restraint brace 1 is used in a plurality of places of a building, and the buckling restraint performance required for the buckling restraint brace 1 is different for each use place.

  However, in this embodiment, for example, as shown in FIG. 6, FIG. 7, FIG. 8, or FIG. 9, a connection location by a plurality of connecting members 5, a length dimension between adjacent connecting members 5, By adjusting the number, the buckling restraint performance can be adjusted, and the buckling restraint brace 1 having the buckling restraint performance suitable for the place of use can be formed. The buckling restraint brace 1 of the embodiment of FIGS. 6 and 7 or the buckling restraint brace 1 of the embodiment of FIGS. 8 and 9 is compared with the buckling restraint brace 1 of the embodiment of FIGS. It is the example adjusted so that bending restraint performance may be reduced.

  In this case, it is possible to obtain a buckling restraint performance suitable for each use location by using the same member only by adjusting the connection location by the connection material 5, the length between the adjacent connection materials 5, and the number of the connection materials 5. be able to.

  Thereby, it is not necessary to prepare a plurality of kinds of different thicknesses as the brace core material 2, the buckling restraining members 3, 4, and the connecting material 5, and the number of members is low, and the buckling is suitable for the place of use. The restraint brace 1 can be easily formed.

  In the present embodiment, when the both buckling restraining members 3 and 4 and the connecting member 5 are connected by the fixing means 9, the gap between the brace core member 2 and the buckling restraining members 3 and 4 is arbitrarily set. Can be set.

  By the way, the performance of the buckling restrained brace 1 varies depending on the gap size between the brace core material 2 and the buckling restraining members 3 and 4. Generally, when the gap is zero or too small, a large frictional force is generated between the brace core material 2 and the buckling restraining members 3 and 4, so that the buckling restraining members 3 and 4 bear the axial force. However, the performance of the brace core material 2 cannot be exhibited sufficiently. On the other hand, when the gap is excessive, buckling deformation of the brace core material 2 becomes large, the damaged portion concentrates, and the fatigue performance decreases.

  Here, in the present embodiment, as described above, when the both buckling restraining members 3 and 4 and the connecting member 5 are connected by the fixing means 9, between the brace core material 2 and the buckling restraining members 3 and 4. Since the gap dimension can be arbitrarily set, it is possible to easily adjust the gap dimension to form a high-performance buckling-restrained brace.

  The brace core 2 and the buckling restraining members 3 and 4 are fixed so as not to move at one place in the longitudinal direction, and can be moved relative to each other in the longitudinal direction except at one fixed place. It has become.

  Thereby, when the buckling restraint brace 1 is set in the standing posture or the oblique posture, the buckling restraining members 3 and 4 do not slide down with respect to the brace core material 2 due to their own weight in the longitudinal direction.

  When the brace core member 2 and the buckling restraining members 3 and 4 are fixed so as not to move at one place in the longitudinal direction, the longitudinal direction is shown in FIGS. 1, 2, 5, 6, and 8. Although the example fixed with the welding 8 in the intermediate position is shown, it is not necessarily limited only to this.

  For example, in the connection place of one connection material 5 among the connection places by the connection material 5 of several places, it fixes by press-contacting the clearance gap between the brace core material 2 and the buckling restraining members 3 and 4 as zero. May be. Other fixing means may be used.

  Furthermore, the fixing position is not limited to only the intermediate position in the longitudinal direction, and may be another position in the longitudinal direction.

  The buckling restrained brace 1 in which the brace core material 2 is not a left-right vertically symmetrical section (square, circle, etc.) generally undergoes buckling deformation in the out-of-plane direction (weak axis direction) when subjected to a compressive force. However, when buckling deformation progresses in the out-of-plane direction, the risk that the brace core material 2 is broken increases.

  However, in the present embodiment, in the out-of-plane direction of the brace core material 2, both the buckling constraint members 3 and 4 effectively restrain the buckling as described above, and both ends of the brace core material 2 in the width direction. Is exposed outside the portion where the connecting member 5 is located.

  For this reason, when a compressive force is applied, the buckling deformation in the out-of-plane direction is suppressed, the buckling deformation can be performed in the in-plane direction, the risk of breakage of the brace core material 2 can be reduced, and the energy absorption The effect can be enhanced.

  Moreover, since both ends in the width direction of the brace core material 2 are exposed at portions other than the portion where the connecting material 5 is located, the deformation of the brace core material 2 is always visually confirmed from the outside in the portion where the connecting material 5 is not disposed. can do. Thereby, the damage and deformation | transformation condition of the brace core material 2 can be confirmed easily. Thereby, it is possible to easily determine whether or not the buckling restraint brace 1 needs to be replaced. In addition, since the effect of the buckling restraining members 3 and 4 can be visually confirmed, it is possible to appeal to the customer that the buckling restraining brace 1 has higher performance than the brace that is not buckling restrained.

  10 (a) and 10 (b) show another embodiment in which the connecting members 5 are used for connection. In the present embodiment, the connecting material 5 is composed of a short metal plate, which is the same as the embodiment of FIG. 1 described above, but in this embodiment, the connecting material 5 made of a short metal plate has a different width. Is used.

  That is, as shown in FIG. 1 and FIG. 2, in the portion where the connecting members 5 in the longitudinal direction of the buckling restraining members 3 and 4 are arranged densely (that is, the portion where the dimension between the adjacent connecting members 5 is short), FIG. a) As shown in (b), the connecting material 5 having a large width is used, and the connecting material 5 having a narrow width is used in a portion not densely arranged. In addition, the wide connecting material 5 also increases the number of fixing portions by the fixing means 9.

  In the present embodiment, the attachment of the connecting member 5 at the densely arranged portion is simplified.

  Moreover, other embodiment connected using the connection material 5 is shown by FIG. 11 (a) (b). In the present embodiment, the connecting material 5 is an example of a short U-shaped metal material.

  In FIG. 11A, the connecting member 5 made of a U-shaped metal material is externally fitted from one of the buckling restraining members 3 and 4 to the one buckling restraining member 3 side, and the both side pieces 11 are attached to one seat. It spans across both side surface pieces 10 of the other buckling restraining member 4 from both side surface pieces 10 of the bending restraining member 3, and both side pieces 11 are fixed to the both side surface pieces 10 of both buckling restraining members 3, 4. It is stuck with.

  Further, in FIG. 11B, the connecting member 5 made of a U-shaped metal material is fitted from the buckling restraining member 3 side of the both buckling restraining members 3 and 4 so that the both side pieces 11 are attached to one side. The both side surface pieces 10 of the other buckling restraining member 3 are bridged so as to extend from both side surface pieces 10 of the other buckling restraining member 3 to both side surface pieces 10 of the other buckling restraining member 4. It is fixed by the fixing means 9.

  In the embodiment of FIGS. 11A and 11B, by connecting both buckling restraining members 3 and 4 with a connecting material 5 made of a U-shaped metal material, a plate-like connecting material 5 is obtained. Compared to this, connection can be performed easily.

  Note that the cross-sectional shape of the buckling restraining members 3 and 4 is not limited to the example in the accompanying drawings, and may be a square metal tube or a U-shaped metal material. In addition, in the case of a U-shaped metal material, it arrange | positions so that the web of the buckling restraining members 3 and 4 may adjoin and oppose on both surfaces of the brace core material 2, respectively.

  The buckling restraining members 3 and 4 may have the same cross-sectional shape or different cross-sectional shapes.

DESCRIPTION OF SYMBOLS 1 Buckling restraint brace 2 Brace core material 3 Buckling restraint member 4 Buckling restraint member 5 Connecting material

Claims (2)

An elongated plate-shaped bracing core, the buckling restraint member that is arranged along substantially the entire length in the longitudinal direction of the both surfaces of the brace core, wherein both buckling restraint members to each other, any of the longitudinal Consists of multiple connecting materials that are connected at multiple locations ,
The buckling-restraining brace according to claim 1, wherein the plurality of connecting members are arranged closer to end portions in the longitudinal direction than in other portions .   The buckling restraint brace according to claim 1, wherein both ends in the width direction of the brace core member are located between both ends in the width direction of the buckling restraint members and exposed to the outside.

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