JP2019070236A - Vibration control structure - Google Patents

Abstract

To suppress breakage of a support member for supporting a vibration control device.SOLUTION: A vibration control structure 10 includes: a frame 12; a steel wall 30 provided in a structure plane of the frame 12; a vibration control device 50 which is connected to the frame 12 and the steel wall 30, and a generates damping force in accordance with a relative displacement between the frame 12 and the steel wall 30; a relief mechanism provided in the vibration control device 50 to reduce the damping force generated by the vibration control device 50 when the relative displacement between the frame 12 and the steel wall 30 is equal to or greater than a predetermined value.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration control structure.

  There is known a vibration control device which is provided in a construction surface of a frame and connected to an upper end portion of a frame provided on a lower beam and an upper beam (see, for example, Patent Document 1).

  There is also known a vibration control apparatus provided with a visco-elastic damper and a steel earthquake-resistant wall which are provided in a construction surface of a frame and connected in series (see, for example, Patent Document 2).

JP, 2001-090381, A JP 2011-117145 A

  In the technique disclosed in Patent Document 1, when relative displacement occurs between the upper end of the frame and the upper beam during an earthquake, the damping device operates to generate a damping force. This reduces the vibration of the frame.

  However, if the relative displacement between the upper end portion of the frame and the upper beam is excessive, there is a possibility that the support member such as the frame for supporting the damping device may be damaged.

  An object of the present invention is, in consideration of the above-mentioned fact, to suppress breakage of a support member which supports a damping device.

  The vibration control structure according to claim 1 is connected to a frame, a support member provided in a surface of the frame, the frame and the support member, and the relative displacement between the frame and the support member. Damping device that generates a damping force and the damping device, and the damping force generated by the damping device is reduced when the relative displacement between the frame and the support member becomes equal to or greater than a predetermined value And a relief mechanism.

  According to the vibration control structure of the first aspect, the support member is provided in the structural surface of the frame. A damping device is connected to the frame and the support member. The damping device generates a damping force in accordance with the relative displacement between the frame and the support member during an earthquake. This reduces the vibration of the frame during an earthquake.

  In addition, the damping device is provided with a relief mechanism. The relief mechanism reduces the damping force generated by the damping device when the relative displacement between the frame and the support member exceeds a predetermined value. Thereby, the seismic force input to the support member from the frame via the damping device is reduced. Therefore, breakage of the support member is suppressed.

  A damping structure according to a second aspect of the present invention is the damping structure according to the first aspect, wherein the support member has a grid-like wall and a plate-like member provided in the opening of the grid-like wall.

  According to the vibration control structure of the second aspect, the support member has the grid-like wall and the plate-like member. The grid-like wall has a plurality of openings. A plate-shaped member is provided in the plurality of openings.

  Therefore, the designability of the support member can be enhanced by appropriately changing the arrangement of the plate-like members with respect to the lattice-like wall, for example, arranging the plurality of plate-like members in a checkered shape (staggered).

  The damping structure according to a third aspect is the damping structure according to the second aspect, wherein the plate-like member has a glass.

  According to the vibration control structure of the third aspect, the plate member has the glass. This can further enhance the design of the support member. In addition, it is possible to enhance the light collecting property of the support member.

  As described above, according to the vibration control structure according to the present invention, it is possible to suppress damage to the support member that supports the vibration control device.

FIG. 1 is an elevation view showing a frame to which a vibration control structure according to an embodiment is applied. 2 is a cross-sectional view taken along line 2-2 of FIG.

  Hereinafter, a vibration control structure according to an embodiment will be described with reference to the drawings.

(Damping structure)
As shown in FIG. 1, the vibration control structure 10 according to the present embodiment includes a frame 12, a steel wall 30 as a support member, and a pair of vibration control devices 50.

(Structure)
The frame 12 is a rigid frame having a pair of columns 14 and an upper beam 16 and a lower beam 18 installed on the pair of columns 14. The pair of columns 14 is, for example, a steel frame column formed of a square steel pipe or the like. The upper beam 16 and the lower beam 18 are, for example, steel frame beams formed of H-shaped steel. Slabs 20 are provided on the upper beam 16 and the lower beam 18 respectively.

  A pair of frame side connection parts 22 to which the damping device 50 is connected is provided at the corners (corners) on both sides of the frame 12. Each frame side connecting portion 22 has a gusset plate 22A and a plurality of reinforcing ribs 22B. The gusset plate 22A is provided across the top of the column 14 and the end of the upper beam 16. The gusset plate 22A is reinforced by a plurality of reinforcing ribs 22B.

(Steel wall)
A steel wall 30 is provided in the structural surface (in the opening) of the frame 12. The steel wall 30 functions as a support member for supporting the pair of damping devices 50. The steel wall 30 is disposed with the wall thickness direction as the out-of-plane direction of the frame 12.

  The steel wall 30 is joined to the lower beam 18 via the slab 20. The steel wall 30 and the slab 20 are joined so as to be able to transmit a shear force via a stud or the like (not shown). Further, openings 24 are respectively formed between the end portions 30S on both sides in the width direction of the steel wall 30 and the pair of columns 14. Further, the lower end side of the end portion 30S of the steel wall 30 and the column base side of the pair of columns 14 are joined via a gusset plate 26 and the like.

  The steel wall 30 and the pair of columns 14 may not be joined.

  The steel wall 30 has a grid-like wall 32 and a plurality of plate-like members 36. The lattice-like wall 32 has a plurality of longitudinal members 32A and cross members 32B. The plurality of longitudinal members 32A and the lateral members 32B are formed of steel plates or the like. The longitudinal members 32A and the cross members 32B are joined in a grid shape by welding or the like.

  Moreover, the lattice-like wall 32 has a plurality of openings 34 surrounded by the longitudinal members 32A and the cross members 32B. Each opening 34 is formed in a rectangular shape. Each opening 34 penetrates the lattice-like wall 32 in the wall thickness direction. A plate-like member 36 is provided in a part of the openings 34.

  Each plate member 36 is formed in a rectangular plate shape by a glass block or the like. Each plate-like member 36 is disposed in the opening 34, and the outer peripheral portion thereof is appropriately joined to the lattice-like wall 32. The opening 34 is closed by the plate-like member 36.

  In addition, it is also possible to form a part of plate-like member 36 with glass, and to form another part with a steel plate etc. That is, the plate-like member 36 can be formed of a member having glass at least in part.

  The plurality of plate members 36 are arranged in a checkered shape (staggered shape). That is, in the lattice-like wall 32, the opening 34 in which the plate-like member 36 is provided and the opening 34 in which the plate-like member 36 is not provided are in the width direction (arrow W direction) of the lattice-like wall 32 and They are alternately arranged in the height direction (arrow H direction).

  The upper end portion of the steel wall 30 is provided with a pair of wall side connection portions 38 to which a pair of damping devices 50 are connected. The pair of wall side connection portions 38 project upward from the upper end of the grid-like wall 32 and are disposed between the pair of frame side connection portions 22. The pair of wall side connection portions 38 are installed on the ceiling. More specifically, the pair of wall side connection portions 38 are disposed between the upper beam 16 and a ceiling material (not shown).

  As shown in FIG. 2, the wall side connection portion (support member side connection portion) 38 is formed of a steel plate 38A joined to the upper end of the steel wall 30, and a plurality of reinforcing ribs 38B for reinforcing the steel plate 38A. ing.

(Falling suppression structure)
Here, the steel wall 30 and the upper beam 16 are connected via the fall suppressing structure 40 which suppresses the falling (deformation) in the wall thickness direction of the steel wall 30. As shown in FIG. 2, the fall suppressing structure 40 includes an engagement plate 42 and a pair of restriction plates 44.

  The engagement plate 42 is provided at the upper end portion of the wall side connection portion 38. Further, the engagement plate 42 is formed of a steel plate or the like, and the thickness direction thereof is disposed as the wall thickness direction of the steel wall 30 (the out-of-plane direction of the frame 12). The engagement plate 42 extends from the upper end of the wall side connection portion 38 toward the upper beam 16 and is inserted between the pair of restriction plates 44.

  A pair of limiting plates 44 is provided on the lower surface of the upper beam 16. Further, the pair of limiting plates 44 is formed of a steel plate or the like, and the thickness direction is disposed as the out-of-plane direction of the frame 12 (the wall thickness direction of the steel wall 30). The pair of restriction plates 44 extend from the lower surface of the upper beam 16 to both sides in the thickness direction of the engagement plate 42. Further, the movement of the engagement plate 42 in the thickness direction, that is, the movement of the steel wall 30 in the wall thickness direction is restricted by the pair of restriction plates 44.

  In addition, the fall suppressing structure 40 may be provided as needed, and can be omitted as appropriate.

(Damping device)
The pair of damping devices 50 is a shear link type oil damper provided with a relief mechanism. The pair of damping devices 50 generate a damping force by expanding and contracting in the axial direction.

  The pair of damping devices 50 are arranged with the expansion and contraction direction as the lateral width direction of the steel wall 30. Further, one end of each damping device 50 is connected to the wall side connecting portion 38, and the other end is connected to the frame side connecting portion 22. The damping device 50 has a cylinder 50A, a piston (not shown) provided in the cylinder 50A, and a rod 50B connected to the piston.

  The damping device 50 has a relief mechanism (not shown). The relief mechanism reduces the damping force generated by the damping device 50 when the relative displacement between the frame 12 (frame-side connector 22) and the steel wall 30 (wall-side connector 38) exceeds a predetermined value. Let

  Specifically, the relief mechanism has, for example, a relief valve provided to the cylinder 50A or the piston. The relief valve has a damping force generated by the damping device 50 when the relative displacement between the frame 12 (frame-side connector 22) and the steel wall 30 (wall-side connector 38) exceeds a predetermined value. When the pressure exceeds a predetermined value, it is opened to reduce the pressure in the cylinder 50A. Thereby, the damping force which damping device 50 generates decreases.

  The timing at which the relief mechanism operates (predetermined value of the relative displacement between the frame 12 and the steel wall 30) is appropriately set, for example, so as not to damage the steel wall 30, particularly the plate-like member 36.

(Action)
Next, the operation of the present embodiment will be described.

  When the frame undergoes shear deformation during an earthquake, relative displacement in the lateral width direction (arrow W direction) of the steel wall 30 occurs in the frame side connection portion 22 and the wall side connection portion 38. Thereby, the damping device 50 connected to the frame side connection part 22 and the wall side connection part 38 expands and contracts, and generates a damping force. Therefore, the vibration of the frame 12 is reduced. The damping device 50 generates a damping force depending on the relative speed between the frame side connection portion 22 and the wall side connection portion 38.

  Here, when the relative displacement between the frame-side connection 22 and the wall-side connection 38 increases due to a large earthquake or the like, the earthquake transmitted from the frame-side connection 22 to the wall-side connection 38 via the damping device 50. The force may be excessive and the steel wall 30 may be damaged. In particular, in the present embodiment, the plate-like member 36 of the steel wall 30 is formed of a glass block. Therefore, when the seismic force acting on the steel wall 30 increases, the plate-like member 36 may be broken.

  As a countermeasure against this, in the present embodiment, the damping device 50 is provided with a relief mechanism. The relief mechanism reduces the damping force generated by the damping device 50 when the relative displacement between the frame side connecting portion 22 and the wall side connecting portion 38 becomes equal to or more than a predetermined value. Thereby, the seismic force input from the frame side connecting portion 22 to the wall side connecting portion 38 via the damping device 50 is reduced. Therefore, breakage of the steel wall 30 is suppressed.

  The steel wall 30 also has a grid-like wall 32 and a plate-like member 36. The grid-like wall 32 has a plurality of openings 34. A plate-like member 36 is provided in these openings 34.

  Here, by appropriately changing the arrangement of the plate-like members 36 with respect to the lattice-like wall 32, the designability of the steel wall 30 can be enhanced. In particular, in the present embodiment, the plurality of plate members 36 are arranged in a checkered shape (staggered shape). Thereby, the designability of the steel wall 30 is enhanced.

  Furthermore, the plate-like member 36 of the present embodiment is formed of a glass block as described above. Thereby, a steel wall with a sense of transparency can be realized. Therefore, the design of the steel wall 30 can be further enhanced. In addition, the light collecting property of the steel wall 30 can be enhanced.

(Modification)
Next, modifications of the above embodiment will be described.

  In the above-mentioned embodiment, although a pair of damping devices 50 are provided in frame 12, the number of damping devices 50 provided in frame 12 can be changed suitably.

  Moreover, although the damping device 50 is installed between the steel-made wall 30 and the upper side beam 16 in the said embodiment, the said embodiment is not restricted to this. The vibration control device may be installed, for example, between the steel wall suspended from the upper beam 16 and the lower beam 18. Moreover, the damping device may be installed between the steel wall provided in a sleeve wall shape on one pillar side and the other pillar.

  Moreover, in the said embodiment, although a damping device is used as an oil damper, the said embodiment is not restricted to this. The damping device may have a relief mechanism, and may be, for example, a viscoelastic damper, a friction damper, or the like.

  Moreover, in the said embodiment, although the some plate-shaped member 36 is arranged in zigzag form on the grid-like wall 32 of the steel wall 30, the number and arrangement of the plate-like members 36 can be changed suitably. Also, the plate-like members 36 may be provided at all the openings 34 of the lattice-like wall 32.

  Moreover, in the said embodiment, although the plate-shaped member 36 is formed with a glass block, the said embodiment is not restricted to this. The plate-like member may be made of metal, wood or the like.

  Moreover, in the said embodiment, although the steel wall 30 is formed in a grid | lattice form, the said embodiment is not restricted to this. The steel wall may be, for example, a steel plate wall reinforced by a rib or the like.

  Moreover, although the steel-made wall 30 as a supporting member is provided in the frame 12 in the said embodiment, the said embodiment is not restricted to this. The support member may be, for example, reinforced concrete or a wooden wall. Further, the support member is not limited to the wall, and may be a brace or the like.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to such Embodiment, You may use it combining suitably one Embodiment and various modifications, The summary of this invention Of course, various modifications can be made without departing from the scope of the invention.

10 Damping structure 12 Frame 30 Steel wall (example of support member)
32 lattice-like wall 34 opening 36 plate-like member 50 damping device

Claims (3)

Frame,
A support member provided in the construction surface of the frame;
A vibration control device connected to the frame and the support member and generating a damping force in accordance with relative displacement between the frame and the support member;
A relief mechanism provided in the damping device to reduce the damping force generated by the damping device when the relative displacement between the frame and the support member becomes equal to or greater than a predetermined value;
Damping structure provided with The support member is
With latticed walls,
A plate-like member provided at the opening of the lattice-like wall;
Have
The vibration control structure according to claim 1. The plate member has a glass,
The vibration control structure according to claim 2.