JP6241250B2 - Friction damper - Google Patents

Description

  The present invention relates to a friction damper that attenuates vibration of a building frame.

  The friction damper that attenuates the vibration of the building frame is provided, for example, at a joint portion between a pair of members in which a brace material (such as H-shaped steel) of a column beam frame is divided. Further, the first pressure contact plate provided integrally with one member of the pair of divided members, and provided integrally with the other member of the pair of members, A friction damper is known in which a second pressure contact plate that is in pressure contact with one pressure contact plate is installed so as to be relatively movable in the direction of bracing (see, for example, Patent Document 1). According to such a friction damper, when the column beam frame vibrates and a tensile axial force or a compressive axial force along the bracing material is applied to the brace material, the first press plate and the second press plate Moves relative to the crossing direction. As a result, a frictional force is generated between the first pressure contact plate and the second pressure contact plate, and the vibration of the column beam frame can be attenuated.

JP2009-150181A

  However, not only the axial force along the direction in which the brace material is passed, but also a bending moment (shearing force) acts on the brace material and the friction damper. Then, the first pressure contact plate spanned between the pair of members, in particular, one end of the first pressure contact plate fixed to one member, and the second member is in pressure contact with the second pressure contact plate. There is a possibility that the efficiency as a damper may be reduced due to excessive deformation of the portion between the other end.

  The present invention has been made in view of such problems, and an object of the present invention is to suppress a decrease in the efficiency of the friction damper due to a bending moment acting on the friction damper.

To achieve this object, a friction damper according to the present invention is disposed between a pair of members that move relative to each other in a predetermined direction in a building frame, and the frictional force between the pressure plates that slide with the relative movement causes the friction damper to A friction damper that suppresses relative movement, the first damper being provided integrally with one member of the pair of members and spanned between the pair of members, and the other of the pair of members A second pressure contact plate provided integrally with the member, and a through hole of the first pressure contact plate and a through hole of the second pressure contact plate on the other member side. A fastening member that presses the first pressure plate and the second pressure plate in a thickness direction perpendicular to the opposing surface of the second pressure plate, and a bending moment acts on the friction damper, and the predetermined In front of the one member and the front A cross-sectional secondary moment of a section cut along the width direction perpendicular to the predetermined direction and the plate thickness direction, and the plate thickness direction, of the first pressure contact plate located between the fastening members, Of the portion of the first pressure contact plate that overlaps with the fastening member in the predetermined direction, a surface facing the second pressure contact plate, a surface opposite to the facing surface and an extended surface thereof, and a pair in the width direction The friction damper is characterized in that it is larger than the cross-sectional second moment of the section cut along the width direction and the plate thickness direction.
According to such a friction damper, it is possible to increase the resistance to bending of the portion of the first pressure contact plate that is easily deformed by a bending moment acting on the friction damper (that is, the portion between one member and the fastening member), Reduction in friction damper efficiency can be suppressed.

This friction damper is a cross-section of a section obtained by cutting a portion of the first pressure contact plate located between the one member and the fastening member in the predetermined direction along the width direction and the plate thickness direction. A second moment is larger than a sectional second moment of a section obtained by cutting a portion of the first pressure contact plate overlapping with the fastening member in the predetermined direction along the width direction and the plate thickness direction; It is a friction damper characterized by.
According to such a friction damper, the cross-sectional secondary moment of the portion of the first pressure contact plate that is easily deformed by the bending moment acting on the friction damper (that is, the portion between one member and the fastening member) is increased, While suppressing a reduction in the efficiency of the friction damper, the cross-sectional secondary moment of the portion of the first pressure contact plate that is difficult to deform (that is, the portion overlapping with the fastening member in a predetermined direction) can be reduced to reduce the cost. .

Such a friction damper is a portion between the one member and the fastening member in the predetermined direction on the opposite surface of the first pressure contact plate, and is outside the fastening member in the width direction. The friction damper is characterized in that a protruding portion extending in the plate thickness direction is provided at the part.
According to such a friction damper, it is possible to increase the cross-sectional secondary moment of the cross section obtained by cutting the portion of the first pressure contact plate located between the one member and the fastening member along the width direction and the plate thickness direction. Can do. Further, it is possible to prevent the protrusion and the fastening member from interfering with each other, and to suppress a reduction in the efficiency of the friction damper.

This friction damper is a portion between the one member and the fastening member in the predetermined direction on the opposite surface of the first pressure contact plate, and the plate is disposed at the center in the width direction. A friction damper characterized in that a protrusion extending in the thickness direction is provided.
According to such a friction damper, it is possible to increase the cross-sectional secondary moment of the cross section obtained by cutting the portion of the first pressure contact plate located between the one member and the fastening member along the width direction and the plate thickness direction. Can do.

In this friction damper, the thickness in the plate thickness direction of the portion of the first pressure plate located between the one member and the fastening member in the predetermined direction overlaps with the fastening member in the predetermined direction. The friction damper is characterized in that it is thicker than the thickness of the portion of the first pressure contact plate in the plate thickness direction.
According to such a friction damper, it is possible to increase the cross-sectional secondary moment of the cross section obtained by cutting the portion of the first pressure contact plate located between the one member and the fastening member along the width direction and the plate thickness direction. Can do.

In this friction damper, there is another fastening member closer to the other member side in the predetermined direction than the fastening member, and a third pressure contact plate that sandwiches the first pressure contact plate together with the second pressure contact plate from both sides. The other fastening member is provided by being inserted into a through hole of the first press contact plate, a through hole of the second press contact plate, and a through hole of the third press contact plate, and the third press contact plate A friction damper, wherein the second pressure contact plate and the third pressure contact plate move relative to the first pressure contact plate in the predetermined direction.
According to such a friction damper, since the number of pressure plates sliding with the relative movement of the pair of members increases and the frictional force increases, the vibration of the building frame can be more reliably damped. The interference between the first pressure contact plate and the fastening member can be prevented, and the decrease in the efficiency of the friction damper can be suppressed.

  With the friction damper according to the present invention, it is possible to suppress a decrease in the efficiency of the friction damper due to a bending moment acting on the friction damper.

1A and 1B are explanatory diagrams of a brace type friction damper (comparative example). It is a side view of the friction damper of a 1st embodiment. 3A is a cross-sectional view of the friction damper cut in the vertical direction at position AA in FIG. 2, and FIG. 3B is a plan view of the friction damper. It is a figure explaining operation | movement of a friction damper. It is sectional drawing which cut the connection member in the up-down direction in the position P1 and the position P2 of FIG. 6A to 6C are explanatory views of a modification of the friction damper of the first embodiment. 7A to 7C are explanatory views of the friction damper according to the second embodiment. 8A to 8C are explanatory views of the friction damper of the third embodiment. It is a side view of the friction damper of a 4th embodiment. It is a figure explaining operation | movement of the friction damper of 4th Embodiment. It is a side view of the friction damper of a 5th embodiment. It is a figure explaining operation | movement of the friction damper of 5th Embodiment.

=== Brace type friction damper ==
1A and 1B are explanatory diagrams of a brace type friction damper 5 (comparative example). A brace-type friction damper 5 shown in FIG. 1A is incorporated in a brace member 4 of a column beam frame 1 (building frame) surrounded by a column 1a standing in a vertical direction and a beam 1b extending in a horizontal direction. . Therefore, the brace material 4 is divided into a suitable position and spaced apart from each other, and is composed of a pair of brace materials 4A and 4B, and a friction damper 5 is provided at the joint between the pair of brace materials 4A and 4B. The brace material 4 shown in FIG. 1A is H-shaped steel, a web of H-shaped steel is attached at an angle along the surface of the column beam frame 1, and the friction damper 5 is attached to a flange of H-shaped steel.

  In the friction damper 5 shown in FIG. 1A, two plate-like connecting members 6 spanned between the pair of brace members 4A and 4B are arranged so as to sandwich the flanges 4Af and 4Bf of the pair of brace members 4A and 4B. Has been. And the bolt 7b is penetrated by the through-hole formed in the end of the connection member 6 with the through-hole formed in flange 4Af of one brace material 4A of a pair of brace materials, and nut 7n is fastened. One end of the connecting member 6 is fixed to the flange 4Af of one brace material 4A. On the other hand, the bolt 8b is inserted into the through hole formed in the other end of the connecting member 6 together with the through hole formed in the flange 4Bf of the other brace member 4B of the pair of brace members, and the nut 8n is fastened. The other end of the connecting member 6 is in pressure contact with the flange 4Bf of the other brace material 4B. In addition, the through hole formed in the flange 4Bf of the other brace material 4B is a long hole extending in the spanning direction of the brace material 4. Therefore, one brace material 4A and the connecting member 6 are movable relative to the other brace material 4B in the spanning direction of the brace material 4. Therefore, when the column beam frame 1 vibrates and a tensile axial force or a compressive axial force acts on the brace material 4, the pair of brace materials 4 </ b> A and 4 </ b> B relatively move in the direction in which the brace material 4 is spanned. As the relative movement occurs, the connecting member 6 that is in pressure contact with the flange 4Bf of the other brace material 4B slides to generate a frictional force, and the relative movement of the pair of brace materials 4A and 4B is suppressed. Thus, the vibration of the column beam frame 1 is attenuated.

  However, both ends of the brace material 4 in which the friction damper 5 is incorporated are generally rigidly connected to the column beam frame 1. Specifically, as shown in FIG. 1A, both ends of the brace material 4 are respectively connected to the gusset plate 2 welded and fixed to the column 1a and the beam 1b at the upper right and lower left of the surface of the column beam frame 1. The plate 3 is joined and fixed by a plurality of bolts or is fixed by welding. Therefore, unlike the case where both ends of the brace material 4 are pivotally connected to each other, when the column beam frame 1 vibrates, the brace material 4 has not only an axial force along the spanning direction of the brace material 4, A bending moment (shearing force) acts to bend the flanges 4Af and 4Bf of the brace material 4 along the surface of the column beam frame 1, and the bending moment also acts on the friction damper 5. In particular, since the pair of brace members 4A and 4B move relative to each other in the friction damper 5, it can be said that a bending moment is easily generated. 1A shows an example in which the friction damper 5 is provided in the middle of the brace material 4. However, the present invention is not limited to this, and as shown in FIG. 1B, the friction damper 5 is directly applied to the gusset plate 2. May be provided. That is, one end of the connecting member 6 may be fixed to the member 2 a erected from the gusset plate 2 with the bolt 7 or the like. Also in this case, when the column beam frame 1 vibrates, a bending moment acts on the friction damper 5.

=== First Embodiment ===
FIG. 2 is a side view of the friction damper 10 according to the first embodiment (a side view in which the Y direction is a normal direction). 3A is a cross-sectional view of the friction damper 10 cut in the vertical direction at the position AA in FIG. 2, and FIG. 3B is a plan view of the friction damper 10. FIG. 4 is a diagram for explaining the operation of the friction damper 10. FIG. 5 is a cross-sectional view of the connecting member 11 cut in the vertical direction at the positions P1 and P2 in FIG. Hereinafter, as in FIG. 1A, an embodiment in which the friction damper 10 is incorporated in the brace material 4 that is H-shaped steel will be described as an example. For the sake of explanation, the direction in which the brace material 4 is stretched is defined as the X direction (predetermined direction), the direction in which the webs 4Aw and 4Bw of the brace material 4 extend is defined as the vertical direction (plate thickness direction), and is orthogonal to the X direction and the vertical direction. The direction to perform is defined as the Y direction (width direction).

  In the first embodiment, ten friction dampers 10 and 10 'are attached to the joint between the pair of brace members 4A and 4B. Specifically, as shown in FIGS. 2 and 3, two friction dampers 10 arranged in the X direction are arranged in two rows on the upper flanges 4Af and 4Bf and the lower flanges 4Af and 4Bf of the brace material 4, respectively. A total of eight pieces are attached, and two friction dampers 10 ′ are attached to the webs 4 Aw and 4 Bw of the brace material 4. Hereinafter, the friction damper 10 attached to the flanges 4Af and 4Bf of the brace material 4 will be described.

  The friction damper 10 is provided integrally with one brace material 4A (one member), a connecting member 11 (first press contact plate) spanned between the pair of brace materials 4A and 4B, and the other brace material 4B ( A sliding plate 13 immovably fixed to the upper and lower surfaces of the flange 4Bf (second press contact plate) of the other member, a friction plate 12 immovably fixed to the connecting member 11, and a flange of the other brace material 4B. A first fastening member 20 (fastening member) that presses the right end of the connecting member 11 to 4Bf, a second fastening member 30 that fixes the left end of the connecting member 11 to the flange 4Af of one brace material 4A, and a spacer 33. Have. The arrangement of the friction plate 12 and the sliding plate 13 may be reversed. Moreover, the friction plate 12 and the sliding plate 13 should just generate | occur | produce moderate frictional force mutually.

  The first fastening member 20 includes a bolt 21, a nut 22, washers 23 and 25, and a disc spring 24. As shown in FIG. 2, the sliding plate 13, the friction plate 12, the connecting member 11, the disc spring 24, the washer 25, and the nut 22 are laminated in this order on the flange 4Bf of the other brace material 4B, for example, from the upper surface to the flange 4Bf. For example, the sliding plate 13, the friction plate 12, the connecting member 11, the washer 23, and the heads of the bolts 21 are stacked in this order from the lower surface to the lower side. In this embodiment, two first fastening members 20 are provided side by side in the X direction, but the number of first fastening members 20 is not limited to this. The bolts 21 are inserted into all of the vertical through holes formed in the connecting member 11, the friction plate 12, the sliding plate 13, and the flange 4Bf of the other brace material 4B. 22 is fastened. As a result, the right end of the connecting member 11 is pressed against the flange 4Bf of the other brace material 4B via the friction plate 12 and the sliding plate 13. In addition, although the disc spring 24 and the washer 25 are interposed between the bolt 21 and the nut 22, the press contact force can be stabilized, but these may be omitted.

  The second fastening member 30 includes a bolt 31 and a nut 32, and a spacer 33 is provided between the flange 4Af of one brace material 4A and the left end of the connecting member 11. Then, the bolt 31 is inserted into all of the through holes in the vertical direction formed in the connecting member 11, the spacer 33, and the flange 4Af of one brace material 4A, and the nut 32 is fastened to the tip of the bolt 31. Yes. Thereby, the left end of the connection member 11 is fixed to the flange 4Af of one brace material 4A.

  Moreover, as shown in FIG. 4 (sectional view in which the periphery of the first fastening member 20 is cut in the vertical direction at the center in the Y direction), the through holes 111 and 121 of the bolts 21 in the connecting member 11 and the friction plate 12 are The through hole 41, 131 of the bolt 21 in the flange 4Bf of the sliding plate 13 and the other brace material 4B is a long hole extending in the X direction, whereas the gap between the bolt 21 and the shaft is a small circular hole. It has become. Therefore, when the column beam frame 1 vibrates, the one brace material 4A and the connecting member 11 are relatively movable in the X direction with respect to the other brace material 4B. Then, the friction plate 12 and the sliding plate 13 slide with the relative movement, a frictional force is generated between the friction plate 12 and the sliding plate 13, and the vibration of the column beam frame 1 is attenuated.

  However, as described above, when the column beam frame 1 vibrates, not only the axial force along the X direction but also a bending moment (shearing force) for bending the flanges 4Af and 4Bf acts on the friction damper 10. . Therefore, suppose that the connecting member spanned between the pair of brace members 4A and 4B is, for example, a thin rectangular parallelepiped plate. Then, among the connecting members, the left end region (region A1 in FIG. 3B) fixed to the flange 4Af of one brace material 4A by the second fastening member 30, and the flange of the other brace material 4B by the first fastening member 20 4Bf and the right end region (region A3 in FIG. 3B), and the central region (region A2 in FIG. 3B) between them, that is, the region A2 between one brace material 4A and the first fastening member 20, There is a possibility that the friction damper 10 is reduced in efficiency due to excessive deformation.

  However, in the first embodiment, as shown in FIGS. 3A and 5, the surface 11b (hereinafter referred to as the outer surface) of the connecting member 11 that faces the flange 4Bf of the other brace material 4B via the friction plate 12 and the sliding plate 13 is used. 11b) of the opposite surface 11a (hereinafter referred to as the inner surface 11a) is a portion (central region A2) between one brace material 4A and the first fastening member 20 in the X direction, and the first fastening in the Y direction. Side wall portions 112 (projections) extending in the vertical direction are provided at both end portions outside the member 20. In this embodiment, the side wall 112 is provided over the entire region of the connecting member 11 in the X direction. Such a connecting member 11 can be formed by bending both ends of the plate-like member, or by erecting a member that serves as a side wall portion on the plate-like member and welding it. It can also be used as the connecting member 11.

  Therefore, in the friction damper 10 of the first embodiment, as shown in FIG. 5, the portion of the connecting member 11 located between the one brace material 4A and the first fastening member 20 in the X direction (central region A2), The flange 4Bf of the other brace material 4B in the portion of the connecting member 11 where the cross-sectional secondary moment of the cross section (P2 cross section) cut along the Y direction and the vertical direction overlaps with the first fastening member 20 in the X direction. A region surrounded by the outer surface 11b, which is the opposite surface, the inner surface 11a opposite to the outer surface 11b and its extended surface 11a ', and the pair of side surfaces 11c and 11d in the Y direction, And the cross-sectional secondary moment of the rectangular cross section (P1 cross section) cut along the vertical direction. In other words, the connecting member 11 of the present embodiment having the side wall portion 112 has a larger sectional secondary moment in the central region A2 than that in the case of not having the side wall portion 112, and has improved sectional performance.

  Accordingly, it is possible to increase the resistance to bending of the central region A2 of the connecting member 11 that easily deforms due to the bending moment acting on the friction damper 10 (the portion between the one brace material 4A and the first fastening member 20). A decrease in the efficiency of the damper 10 can be suppressed. Further, by increasing the cross-sectional performance by providing the side wall portion 112 on the connecting member 11, for example, the cost can be reduced as compared with a case where the entire plate thickness of the connecting member 11 is simply increased.

  As shown in FIG. 5, the range of the inner side surface 11a of the connecting member 11 is a range between the points p1 intersecting the inner side surface of the side wall portion 112, and the range of the extended surface 11a ′ of the inner side surface 11a is a point. This is a range from p1 to a point p2 that intersects the side surfaces 11c and 11d. Further, the portion of the connecting member 11 that overlaps with the first fastening member 20 in the X direction is a portion of the connecting member 11 whose position in the X direction is the same as the position of the first fastening member 20 in the X direction.

  In this embodiment, as shown in FIG. 1A, the brace material 4 is attached so that the web of the brace material 4 is along the surface of the column beam frame 1, and a bending moment acts on the friction damper 10 attached to the flange. The case is given as an example. Therefore, as shown in FIG. 3A, the connecting member 11 of the friction damper 10 attached to the flange 4Bf is provided with a side wall portion 112, whereas the connecting member 11 'of the friction damper 10' attached to the web 4Bw is provided. Does not provide a side wall. By doing so, cost reduction can be achieved. Further, even if the connecting member 11 of the friction damper 10 ′ attached to the web 4 </ b> Bw does not have a side wall portion, there is little risk of a decrease in efficiency and there is no problem. In addition, you may attach the brace material 4 so that the flange of the brace material 4 may follow the construction surface of the column beam frame 1, and in that case, a side wall part is attached to connecting member 11 'of the friction damper 10' attached to a web. It is good to provide. Further, the brace material 4 is not limited to the H-shaped steel, and may be a square steel pipe or the like, for example.

<< Modification >>
6A to 6C are explanatory views of a modification of the friction damper 10 of the first embodiment. 6A and 6B are plan views of the connecting member 11, in which the through hole 111 of the bolt 21 of the first fastening member 20 and the through hole 113 of the bolt 31 of the second fastening member 30 are drawn. 6C is a cross-sectional view of the connecting member 11 at the positions P1 and P2 in FIGS. 6A and 6B. In the connecting member 11 of the above embodiment, the side wall portion 112 is provided over the entire region in the X direction, but this is not a limitation. Among the connecting members 11, the left end region A1 fixed to the flange 4Af of one brace material 4A and the right end region A3 press-contacted to the flange 4Bf of the other brace material 4B are connected to one brace material 4A and the first one. Compared to the central region A2 between the fastening members 20, deformation or the like due to a bending moment is less likely to occur, and it is not necessary to improve the cross-sectional performance as much as the central region A2.

  Therefore, for example, as shown in FIG. 6A, the side wall portion 112 may be provided only in the left end region A1 and the central region A2 of the connecting member 11, or as shown in FIG. You may make it provide the side wall part 112 only in area | region A2. In these cases, as shown in FIG. 6C, the portion of the connecting member 11 located between the one brace material 4A and the first fastening member 20 (central region A2) in the X direction is along the Y direction and the vertical direction. The cross-sectional secondary moment of the cross-section cut (P2 cross-section) is a cross-section (P1 cross-section) cut along the Y direction and the vertical direction of the portion of the connecting member 11 overlapping the first fastening member 20 in the X direction. It becomes larger than the section moment of inertia. Therefore, the resistance to bending of the central region A2 of the connecting member 11 that is easily deformed by the bending moment acting on the friction damper 10 can be increased, and a decrease in efficiency of the friction damper 10 can be suppressed.

  Furthermore, in this modified example, since the length of the side wall portion 112 in the X direction is shorter than that in the above embodiment, the cost can be further reduced. However, when a general-purpose member such as channel steel is used as the connecting member 11, for example, the connecting member 11 of the above embodiment can omit the process of partially cutting the side wall portion 112. Moreover, in the said embodiment, although the side wall part 112 is provided in the both ends of the Y direction of the connection member 11, you may make it provide the side wall part 112 only in the edge part of one side (not shown). ).

=== Second Embodiment ===
7A to 7C are explanatory views of the friction damper 10 according to the second embodiment. 7A is a side view of the friction damper 10 with the Y direction as a normal direction, FIG. 7B is a plan view of the connecting member 11, and FIG. 7C is a connecting member at the positions P1 and P2 shown in FIGS. 7A and 7B. 11 is a cross-sectional view of FIG. The friction damper 10 of the second embodiment has the same configuration as the friction damper 10 of the first embodiment except for the connecting member 11.

  The connecting member 11 of the second embodiment is a portion (central region A2) between one brace material 4A and the first fastening member 20 in the X direction on the inner side surface 11a of the connecting member 11, and in the Y direction. A plate-like reinforcing member 14 (protrusion) extending in the vertical direction is vertically fixed at the center by welding or the like (that is, the connecting member 11 is a plate-like member having the reinforcing member 14 erected). . Therefore, the connecting member 11 (the connecting member 11 including the reinforcing member 14 (first press contact plate)) located between the one brace material 4A and the first fastening member 20 (central region A2) is arranged in the Y direction and the vertical direction. The cross-section (P2 cross-section in FIG. 7C) cut along the cross-section (P2 cross-section) of the connecting member 11 overlapping the first fastening member 20 in the X-direction along the Y-direction and the up-and-down direction (FIG. It is larger than the moment of inertia of the section (P1 section of 7C).

  Therefore, the resistance to bending of the central region A2 of the connecting member 11 that is easily deformed by the bending moment acting on the friction damper 10 can be increased, and a decrease in efficiency of the friction damper 10 can be suppressed. Further, in the connecting member 11 of the second embodiment, the reinforcing member 14 is provided only in a part of the central region A2 and the left end region A1 (region in front of contact with the second fastening member 30) in the X direction. For example, cost reduction can be achieved compared with the case where the whole plate | board thickness of the connection member 11 is simply thickened. Further, by providing the reinforcing member 14 at the center of the connecting member 11 in the Y direction, deformation of the connecting member 11 can be suppressed without being biased in the Y direction. The shape of the reinforcing member 14 is not limited to a plate shape, and may be a triangular prism, for example. Further, the plurality of reinforcing members 14 may be arranged at intervals in the Y direction, the reinforcing members 14 may be arranged so as to be biased toward one end side in the Y direction, or the center of the connecting member 11 The reinforcing member 14 may be disposed only in the region A2.

=== Third Embodiment ===
8A to 8C are explanatory views of the friction damper 10 according to the third embodiment. 8A is a side view of the friction damper 10 with the Y direction as the normal direction, FIG. 8B is a plan view of the connecting member 11, and FIG. 8C is the connecting member at the positions P1 and P2 shown in FIGS. 8A and 8B. 11 is a cross-sectional view of FIG. The friction damper 10 of the third embodiment has the same configuration as the friction damper 10 of the first embodiment except for the connecting member 11.

  In the connecting member 11 of the third embodiment, the reinforcing member 14 is fixed by welding or the like so that the surface of the plate-like reinforcing member 14 overlaps the inner side surface 11a of the connecting member 11 in the left end region A1 and the central region A2. (That is, the connecting member 11 is a plate-like member with a reinforcing member 14 superimposed thereon). Therefore, the thickness in the vertical direction of the connecting member 11 (the connecting member 11 including the reinforcing member 14 (first press contact plate)) located between the one brace material 4A and the first fastening member 20 in the X direction is the X direction. The thickness of the connecting member 11 that overlaps the first fastening member 20 is greater than the thickness in the vertical direction. Therefore, the cross-section (the connecting member 11 including the reinforcing member 14) positioned between the one brace material 4A and the first fastening member 20 (central region A2) along the Y direction and the vertical direction ( The cross-sectional secondary moment of the P2 cross section in FIG. 8C is a cross-section (P1 cross section in FIG. 8C) obtained by cutting the portion of the connecting member 11 that overlaps with the first fastening member 20 in the X direction along the Y direction and the vertical direction. It is larger than the cross-sectional second moment.

  Therefore, it is possible to increase the resistance to bending of the central region A2 of the connecting member 11 that is easily deformed by the bending moment acting on the friction damper 10, and it is possible to suppress a decrease in efficiency of the friction damper 10. Moreover, in the connection member 11 of 3rd Embodiment, since the reinforcement member 14 is provided only in left end area | region A1 and center area | region A2, compared with the case where the whole board thickness of the connection member 11 is simply thickened, for example. Cost reduction can be achieved. In addition, it is not necessary to arrange the reinforcing member 14 in the left end region A1, and by doing so, the cost can be further reduced. In FIG. 8, the length and thickness in the Y direction of the connecting member 11 and the reinforcing member 14 are aligned. However, the length and thickness are not limited to this, and the length and thickness in the Y direction may be different.

=== Fourth Embodiment ===
FIG. 9 is a side view of the friction damper 10 of the fourth embodiment (a side view with the Y direction as the normal direction). FIG. 10 is a diagram for explaining the operation of the friction damper 10 of the fourth embodiment. In the first to third embodiments, a friction damper that generates a frictional force between the two sliding plates 13 provided on the upper and lower surfaces of the flange 4Bf of the other brace material 4B and the friction plate 12 opposed thereto. 10, a so-called two-surface friction friction damper 10 is taken as an example. Therefore, two first fastening members 20 are arranged in the X direction to widen the friction surfaces of the friction plate 12 and the sliding plate 13. On the other hand, in the friction damper 10 of the fourth embodiment, the number of the first fastening members 20 is reduced to one while keeping the friction surfaces of the friction plate 12 and the sliding plate 13 wide.

  For this purpose, the friction damper 10 of the fourth embodiment is provided with a pressure contact plate 15 as a member to which the friction plate 12 and the sliding plate 13 are fixed, in addition to the connecting member 11 and the flange 4Bf of the other brace material 4B. Yes. The right end of the pressure contact plate 15 is fixed to the upper and lower surfaces of the flange 4Bf of the other brace material 4B via spacers 41 by third fastening members 40 (bolts and nuts). Therefore, the press contact plate 15 moves relative to the connecting member 11 in the X direction together with the other brace material 4B.

  Then, as shown in FIG. 9, the first friction plate 12a, the first sliding plate 13a, the connecting member 11, the second sliding plate 13b, and the second friction plate 12b are arranged upward from the upper surface of the flange 4Bf of the other brace material 4B. , The pressure plate 15, the disc spring 24, the washer 25, and the nut 22 are sequentially stacked, and the first friction plate 12 a, the first sliding plate 13 a, the connecting member 11, the second sliding plate 13 b, 2 The friction plate 12b, the press contact plate 15, the washer 23, and the heads of the bolts 21 are sequentially stacked. The first sliding plate 13a and the second sliding plate 13b are fixed to the connecting member 11 so as not to move, the first friction plate 12a is fixed to the flange 4Bf of the other brace material 4B so as not to move, and the second friction plate 12b is pressed. The plate 15 is fixed so as not to move.

  Further, as shown in FIG. 10, the through holes 151 and 41 of the bolt 21 in the press contact plate 15 and the flange 4Bf of the other brace material 4B are regular circular holes having a small gap with the shaft of the bolt 21. The through hole 111 of the bolt 21 in the connecting member 11 is a long hole extending in the X direction. Therefore, when the column beam frame 1 vibrates, the one brace member 4A and the connecting member 11 move relative to the other brace member 4B and the pressure contact plate 15 in the X direction. With the relative movement, the first friction plate 12a and the first sliding plate 13a slide to generate a frictional force, and the second friction plate 12b and the second sliding plate 13b slide to generate frictional force. Therefore, the vibration of the column beam frame 1 is attenuated.

  Moreover, the connection member 11 of 4th Embodiment is provided with the side wall part 112 in the both ends of the Y direction similarly to the connection member 11 of 1st Embodiment. Therefore, as described in the first embodiment, it is possible to suppress a reduction in efficiency of the friction damper 10 due to a bending moment acting on the friction damper 10.

  However, in the case of the friction damper 10 of the fourth embodiment, the first fastening member 20 moves relative to the connecting member 11 in the X direction. Therefore, the reinforcing member 14 is erected at the center of the connecting member 11 in the Y direction as in the second embodiment, or the plate-like reinforcing member 14 is overlapped on the connecting member 11 as in the third embodiment. If provided, the reinforcing member 14 and the first fastening member 20 interfere with each other. Therefore, in the case of the friction damper 10 of the fourth embodiment, as in the first embodiment, the side wall portion 112 (protrusion portion) is formed on the outer side surface of the first fastening member 20 in the Y direction on the inner surface 11a of the connecting member 11. ) Should be provided. By doing so, interference between the connecting member 11 and the first fastening member 20 can be prevented, and a decrease in efficiency of the friction damper 10 can be suppressed.

=== Fifth Embodiment ===
FIG. 11 is a side view of the friction damper 10 of the fifth embodiment (a side view in which the Y direction is the normal direction). FIG. 12 is a diagram for explaining the operation of the friction damper 10 of the fifth embodiment. In the friction damper 10 of the fourth embodiment, since the friction surfaces of the first fastening member 20 are four, the connecting member 11 of the second and third embodiments cannot be applied. Therefore, in the friction damper 10 of the fifth embodiment, the friction surface of the first fastening member 20 is two, and the fourth fastening member 50 (on the other brace material 4B side in the X direction from the first fastening member 20). The other fastening member) and the pressure contact plate 15 (third pressure contact plate) are provided, and the friction surfaces of the fourth fastening member 50 are set to four surfaces.

  Therefore, the first fastening member 20 is laminated in the order of the first friction plate 12a, the first sliding plate 13a, and the connecting member 11 from the upper surface of the flange 4Bf of the other brace material 4B, and from the lower surface of the flange 4Bf. The members laminated in the order of the first friction plate 12a, the first sliding plate 13a, and the connecting member 11 are pressed against each other. On the other hand, the fourth fastening member 50 is formed from the upper surface of the flange 4Bf of the other brace material 4B upward from the first friction plate 12a, the first sliding plate 13a, the connecting member 11, the second sliding plate 13b, and the second friction plate 12b. The first friction plate 12a, the first sliding plate 13a, the connecting member 11, the second sliding plate 13b, the second friction plate 12b, and the pressing plate 15 are stacked in this order from the lower surface of the flange 4Bf. The members stacked in this order are pressed. The first sliding plate 13a and the second sliding plate 13b are fixed to the connecting member 11 so as not to move. The first friction plate 12a is fixed to the flange 4Bf of the other brace material 4B so as not to move, and the second friction plate 12b. Is fixed to the press contact plate 15 so as not to move.

  And as shown in FIG. 12, in order to insert the volt | bolt 21 of the 1st fastening member 20, the through-hole 111 formed in the connection member 11 is a perfect circular hole with a small clearance gap with the axis | shaft of the volt | bolt 21. On the other hand, the through hole 41 formed in the flange 4Bf of the other brace material 4B is a long hole extending in the X direction. On the other hand, in order to insert the bolt 51 of the fourth fastening member 50, the through holes 151 and 41 ′ formed in the flange 4Bf of the press contact plate 15 and the other brace material 4B are positive with a small clearance from the shaft of the bolt 51. In contrast to the circular hole, the through hole 111 ′ formed in the connecting member 11 is a long hole extending in the X direction. Therefore, when the column beam frame 1 vibrates, the one brace member 4A and the connecting member 11 move relative to the other brace member 4B and the pressure contact plate 15 in the X direction. With the relative movement, the first friction plate 12a and the first sliding plate 13a slide to generate a frictional force, and the second friction plate 12b and the second sliding plate 13b slide to generate frictional force. Therefore, the vibration of the column beam frame 1 is attenuated.

  Also in the friction damper 10 of the fifth embodiment, by applying the connecting member 11 shown in the first to third embodiments, the efficiency of the friction damper 10 is reduced due to the bending moment acting on the friction damper 10. Can be suppressed. In the friction damper of the fifth embodiment, since the first fastening member 20 moves in the X direction in conjunction with the connecting member 11, any of the connecting members 11 shown in the first to third embodiments is applied. However, interference between the connecting member 11 and the first fastening member 20 can be prevented, and a reduction in efficiency of the friction damper 10 can be suppressed. Furthermore, since the friction surfaces of the fourth fastening member 50 are four, it is possible to reduce the size while securing a large number of friction surfaces.

=== Other Embodiments ===
The above embodiment is for facilitating the understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

  For example, in the above embodiment, the friction damper is incorporated in the brace material in the column beam frame. However, the present invention is not limited to this, and for example, the friction damper may be incorporated in the stud column or the partition wall. A friction damper may be incorporated at any location between the pair of moving members.

  Further, the side wall portions 112 are provided at both ends in the Y direction as in the connecting member 11 in the first embodiment, and the reinforcing member 14 in the center portion in the Y direction is provided as in the connecting member 11 in the second embodiment. Alternatively, a connecting member obtained by combining a plurality of thickening plates as in the connecting member 11 of the third embodiment may be used.

1 Column beam (building frame), 1a column, 1b beam, 2 gusset plates,
3 joint plate, 4 brace material, 4A one brace material (one member),
4B The other brace material (the other member), 4Af flange, 4Aw web,
4Bf flange (second press contact plate), 4Bw web, 5 friction damper (comparative example),
6 connecting member, 7b bolt, 7n nut, 8b bolt, 8n nut,
10 friction damper, 11 connecting member (first press contact plate), 12 friction plate, 13 sliding plate,
14 reinforcing members, 15 pressure contact plates (third pressure contact plates), 20 first fastening members (fastening members),
21 bolts, 22 nuts, 23 washers, 24 disc springs, 25 washers,
30 Second fastening member, 31 bolt, 32 nut, 33 spacer,
40 third fastening member, 41 spacer, 50 fourth fastening member (other fastening member),
51 bolts, 52 nuts, 53 washers, 54 disc springs, 55 washers

Claims (6)

A friction damper that is disposed between a pair of members that move relative to each other in a predetermined direction in a building frame, and that suppresses the relative movement by a frictional force between pressure plates that slide with the relative movement,
A first pressure contact plate provided integrally with one member of the pair of members and spanned between the pair of members;
A second pressure contact plate provided integrally with the other member of the pair of members;
Thickness direction perpendicular to the opposing surface of the first pressure contact plate and the second pressure contact plate provided on the other member side through the through hole of the first pressure contact plate and the through hole of the second pressure contact plate A fastening member that press-contacts the first press-contact plate and the second press-contact plate;
Have
A bending moment acts on the friction damper,
A portion of the first pressure-contact plate located between the one member and the fastening member in the predetermined direction is along the width direction perpendicular to the predetermined direction and the plate thickness direction, and the plate thickness direction. The sectional moment of inertia of the cut section is
Of the portion of the first pressure contact plate that overlaps with the fastening member in the predetermined direction, a surface facing the second pressure contact plate, a surface opposite to the facing surface and an extended surface thereof, and a pair in the width direction A portion surrounded by the side surface of the cross-sectional moment of the cross section cut along the width direction and the plate thickness direction is larger than the cross-sectional second moment.
Friction damper characterized by. The friction damper according to claim 1,
A section secondary moment of a section obtained by cutting a portion of the first pressure contact plate located between the one member and the fastening member in the predetermined direction along the width direction and the plate thickness direction,
A portion of the first pressure contact plate that overlaps with the fastening member in the predetermined direction is greater than a cross-sectional second moment of a cross section cut along the width direction and the plate thickness direction;
Friction damper characterized by. The friction damper according to claim 1 or 2,
Of the surface on the opposite side of the first pressure contact plate, the plate thickness is a portion between the one member and the fastening member in the predetermined direction, and a portion outside the fastening member in the width direction. A protrusion extending in the direction,
Friction damper characterized by. The friction damper according to any one of claims 1 to 3,
Of the surface on the opposite side of the first pressure contact plate, there is a protrusion between the one member and the fastening member in the predetermined direction, and a protrusion extending in the plate thickness direction at the center in the width direction. Is provided,
Friction damper characterized by. The friction damper according to any one of claims 1 to 4, wherein
The thickness of the first pressure contact plate located between the one member and the fastening member in the predetermined direction is such that the thickness of the first pressure contact plate overlaps with the fastening member in the predetermined direction. It is thicker than the thickness in the plate thickness direction of the part,
Friction damper characterized by. The friction damper according to any one of claims 1 to 5,
On the other member side in the predetermined direction with respect to the fastening member, another fastening member and a third pressure contact plate that sandwiches the first pressure contact plate from both sides together with the second pressure contact plate are provided.
The other fastening member is provided through the through hole of the first press contact plate, the through hole of the second press contact plate, and the through hole of the third press contact plate, and the third press contact plate is connected to the first press contact plate. 1 Press contact with pressure plate,
The second pressure plate and the third pressure plate are moved relative to the first pressure plate in the predetermined direction;
Friction damper characterized by.