JP2014025295A - Vibration control wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel vibration control device that enables a vibration control function to be obtained more securely.SOLUTION: In a vibration control wall 220, a vibration control device 100 attached to a rectangular framework 203 has a restraining member 80 further attached thereto. Here, the restraining members 80 are disposed across two pillars 70a,70b of the rectangular framework 203 so as to hold two braces 42a, 42b of the vibration control device 100 therebetween in the longitudinal direction of the rectangular framework 203.

Description

  The present invention relates to a damping wall.

  A vibration damping device attached to the wall of a building is disclosed in, for example, Japanese Patent Application Laid-Open No. 2009-293213. The vibration damping device of the publication includes a vibration damping unit and a transmission mechanism that transmits shear deformation generated in the building to the vibration damping unit. The transmission mechanism includes an upper transmission member attached to the upper beam of the building and a lower transmission member attached to the lower beam of the building. The lower transmission member includes two braces extending obliquely downward from a portion connected to the vibration suppression unit so as to gradually increase the distance between each other, and a base material spanning the lower ends of the two braces, have. The base material is fastened to the lower beam of the building by a bolt with a washer.

JP 2009-293213 A

  Here, a new damping wall that uses such a damping device and that can obtain a damping function more reliably is proposed.

  The damping wall proposed here includes a rectangular frame surrounded by an upper beam, a lower beam, and two columns, and a damping device housed in the rectangular frame. Here, the vibration damping device is disposed between the opposed plates, the viscoelastic body that is bonded to each plate, and the first transmission member that is connected to one of the opposed plates. And a second transmission member connected to the other plate of the opposing plates. Of the first transmission member and the second transmission member, at least one of the transmission members is formed on the flange provided to be orthogonal to the plate and on the surface of the flange opposite to the plate as the distance from the flange increases. There are provided two braces extending so as to gradually increase the distance between the two braces, and a base portion that is stretched over the ends of the two braces and attached to both of the two braces. Furthermore, this damping wall is provided with the restraining material spanned by the two pillars so as to sandwich the two braces before and after the rectangular frame.

  In this case, before and after the rectangular frame (both sides in the thickness direction of the damping wall), the restraining material is disposed so as to sandwich the two braces of the damping device. For this reason, even when a large axial force in the compression direction acts on the brace, the two braces are supported by the restraining material, so that the two braces are prevented from buckling in the thickness direction of the damping wall. .

  In this case, the restraint material may be a plate material. Further, the restraining material may be a plurality of plate-like bars, and may be bridged between the two pillars at intervals in the height direction. In addition, the two pillars may be provided with a step where the plate-like restraining material fits on the inner surface facing the inside of the rectangular frame. Further, the step may be provided by attaching a receiving material having a width narrower than that of the pillar to the inner side surfaces of the two pillars in the front-rear direction of the rectangular frame. Further, in the front-rear direction of the rectangular frame, the gap between the restraining members provided before and after the rectangular frame may be slightly larger than the thickness of the two braces in the front-rear direction.

The figure which shows the damping device used for the damping wall which concerns on one Embodiment of this invention. The figure which expanded the damping unit of the damping device. The front view of the damping unit of a damping device. The bottom view of the damping unit of a damping device. The side view of the damping unit of a damping device. The figure which shows the state which the shear deformation acted on the damping unit. The figure which shows the hysteresis loop of a viscoelastic body. VIII-VIII cross-sectional arrow view of FIG. The side view which shows the attachment structure of a flange and a brace. The figure which shows the attachment structure of a horizontal shaft material and a brace. The top view of a base. The disassembled perspective view which shows the attachment structure of a base and a foundation. The perspective view which shows the state in which the base was attached to the base. The figure which shows the damping wall which concerns on one Embodiment of this invention. XV-XV sectional drawing of FIG. XVI-XVI partial sectional view of FIG. (A), (b) is a figure which shows the use condition of a damping device. The perspective view which shows another form about the joining structure of the flange of a damping device and two braces. The disassembled perspective view which shows another form about the joining structure of the flange of a damping device and two braces. The figure which shows the other form of a reinforcement member. The figure which shows the other form of a horizontal shaft material. FIG. 22 is a development view of the horizontal shaft member shown in FIG. 21.

  Hereinafter, a damping wall according to an embodiment of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment. Moreover, the same code | symbol is attached | subjected suitably to the member and site | part which show | play the same effect | action. Each figure is schematically drawn for convenience of explanation, and does not necessarily reflect the actual object unless otherwise specified. Here, first, a damping device used for the damping wall will be described, and then the damping wall will be referred to.

<Vibration control device>
FIG. 1 shows a vibration damping device 100. As shown in FIG. 1, the vibration damping device 100 includes a vibration damping unit 10, an upper transmission member 30 as a first transmission member, and a lower transmission member 40 as a second transmission member. In the example shown in FIG. 1, the vibration damping unit 10 is disposed in a rectangular frame 203 surrounded by an upper beam 50, a lower beam 60, and columns 70a and 70b of a building 200. Here, the upper beam 50, the lower beam 60, and the columns 70a and 70b are structural materials of the building 200, respectively.

  In this embodiment, the building 200 is a wooden house. The vibration damping device 100 is attached to the first floor of the building 200. Here, the lower beam 60 is specifically a base attached to the concrete foundation 202 with anchor bolts. The upper beam 50 is a second floor beam. The vibration damping device 100 is a rectangular frame 203 surrounded by the base 60, the second-floor floor beam 50, and the first floor pillars 70a and 70b of the building 200 that rises from the base 60 and supports the second-floor floor beam 50. Is attached. In this embodiment, a hole down hardware 150 is attached to the pillars 70a and 70b. The columns 70 a and 70 b are fixed by attaching a hole down hardware 150 to a hole down bolt 105 embedded in the concrete foundation 202. In addition, a foundation packing 106 having a thickness of about 2 cm is attached between the concrete foundation 202 and the base 60 to ensure ventilation in the concrete foundation 202.

<Vibration control unit 10>
FIG. 2 is an enlarged view of the vibration damping unit 10. 3 to 5 show the vibration damping unit 10 in a state before being attached to the vibration damping device 100, respectively. 3 is a front view of the vibration damping unit 10, FIG. 4 is a bottom view of the vibration damping unit 10, and FIG. 5 is a side view of the vibration damping unit 10, and is a left side view of FIG. . As shown in FIGS. 3 to 5, the vibration control unit 10 includes a pair of opposed plates (12, 13) and 14, and viscoelastic bodies 18 a and 18 b.

<A pair of plates (12, 13), 14>
In this embodiment, the pair of plates (12, 13) and 14 are each a rectangular steel plate. As shown in FIGS. 3 to 5, the plates 12 and 13 are disposed so as to face the plate 14 when viewed from the normal direction of the pair of plates (12 and 13) and 14. The plate 12 and the plate 13 are rectangular steel plates having the same shape, and are arranged in parallel with their directions aligned. The plate 14 is arranged such that one side in the longitudinal direction is disposed between the plate 12 and the plate 13 and the other side protrudes from the plate 12 and the plate 13.

  One side of the plate 14 overlaps the region where the plate 12 and the plate 13 overlap, but the opposite side of the plate 14 protrudes from the region. Further, both sides of the plate 12 and the plate 13 protrude from the region where the plates 14 overlap each other. On both sides of the plate 12 and the plate 13, insertion holes 17 for inserting bolts are formed in portions protruding from the region where the plate 14 overlaps. Further, a flange 15 is provided at one end of the plate 14 that protrudes from the region overlapping the plate 12 and the plate 13 so as to be orthogonal to the plate 14. In this embodiment, the flange 15 is welded to one end of the plate 14. The flange 15 is formed with an insertion hole 15a for inserting a bolt.

<Viscoelastic body 18a, 18b>
The viscoelastic bodies 18a and 18b are made of viscoelastic rubber (damping rubber) having high damping properties, for example. In this embodiment, the viscoelastic bodies 18a and 18b are each formed into a rectangular flat plate shape. The viscoelastic bodies 18a and 18b are respectively disposed in rectangular regions where the plates (12, 13) and 14 overlap each other when viewed from the normal direction of the plates (12, 13) and 14. Here, the viscoelastic body 18a is disposed between the plate 14 and the plate 12, and is bonded to the plate 14 and the plate 12, respectively. The viscoelastic body 18b is disposed between the plate 14 and the plate 13, and is bonded to the plate 14 and the plate 13, respectively. Here, the viscoelastic bodies 18a and 18b and the plates (12, 13) and 14 are bonded by vulcanization adhesion.

  Examples of the viscoelastic rubber (damping rubber) having high damping used as the viscoelastic bodies 18a and 18b include natural rubber, styrene butadiene rubber (SBR), nitrile butadiene rubber (NBR), and butadiene rubber material ( BR), isoprene rubber (IR), butyl rubber (IIR), halogenated butyl rubber (X-IIR), and chloroprene rubber (CR) rubber materials are added to produce high damping properties. A rubber composition can be used. Various additives such as carbon black are known as additives exhibiting high attenuation.

  As shown in FIG. 6, the plate 14 is moved in parallel with respect to the plate 12 and the plate 13 to cause shear deformation in the viscoelastic bodies 18a and 18b. At this time, a hysteresis loop A (measured hysteresis curve) as shown in FIG. 7 is drawn from the relationship between the shear displacement generated in the viscoelastic bodies 18a and 18b and the shear load. In FIG. 7, the horizontal axis indicates the displacement in the shear direction, and the vertical axis indicates the shear load at that time. According to the hysteresis loop A, it can be seen that the shear load increases as the shear displacement increases, and the resistance force of the viscoelastic bodies 18a and 18b increases. When the viscoelastic bodies 18a and 18b are subjected to vibration accompanied by shear deformation, the viscoelastic bodies 18a and 18b can absorb energy corresponding to the energy surrounded by the hysteresis loop A every cycle.

  Next, the upper transmission member 30 and the lower transmission member 40 will be described. The upper transmission member 30 and the lower transmission member 40 are members that transmit the shear displacement generated in the building 200 to the vibration suppression unit 10.

<Upper transmission member 30>
As shown in FIG. 2, the upper transmission member 30 is connected to one plate (12, 13) and the second floor beam 50 of the pair of plates (12, 13), 14 facing the vibration control unit 10. It is a member to be connected. As shown in FIG. 2, the upper transmission member 30 includes a base 32 and mounting pieces 34a and 34b. The base 32 is a steel plate member disposed along the lower surface of the second floor beam 50. Bolt insertion holes 32 a are formed through the base 32. The base 32 is attached to the second floor beam 50 by inserting the bolt 52 through the bolt insertion hole 32a.

  The two attachment pieces 34 a and 34 b are welded to the base 32 and are pieces that extend downward from the base 32. The two attachment pieces 34a and 34b fit between the plates 12 and 13 of the vibration damping unit 10 described above (see FIG. 4) and have a required rigidity. As shown in FIG. 2, the two attachment pieces 34 a and 34 b are spaced apart from the plate 14 of the vibration damping unit 10 disposed between the plates 12 and 13 by a predetermined distance, respectively. It is arranged on both sides. In this embodiment, the plates 12 and 13 are fixed to the two attachment pieces 34 a and 34 b of the upper transmission member 30 with bolts and nuts 17 a. The distance between the plates 12 and 13 of the damping unit 10 is maintained by the two attachment pieces 34a and 34b. Further, there is a required gap between the plate 14 and the two attachment pieces 34a and 34b so that the plate 14 can swing with a predetermined amplitude.

<Lower transmission member 40>
The lower transmission member 40 is a member connected to the other plate 14 of the pair of opposed plates (12, 13) and 14 of the vibration suppression unit 10 and the base 60. In this embodiment, the lower transmission member 40 includes two braces 42 a and 42 b and a base portion 44. As shown in FIGS. 1 and 2, the lower transmission member 40 includes a flange 48 that is attached to the flange 15 provided at one end of the plate 14 so that the surfaces thereof are aligned. The flange 48 of the lower transmission member 40 abuts the flange 15 of the plate 14 and is fastened by a bolt nut 48a. An attachment piece 49 for attaching the two braces 42a and 42b is welded to the flange 48 in a state of rising from the flange 48 (in a state extending downward from the flange 48 in FIG. 2).

<Brace 42a, 42b>
The two braces 42a and 42b extend from the portion connected to the plate 14 so that the distance between them is gradually increased. In this embodiment, the two braces 42 a and 42 b are welded to a mounting piece 49 rising from a flange 48 connected to the plate 14. The two braces 42a and 42b extend from the flange 48 so that the distance between them gradually increases. A plurality of (three in the example shown in FIG. 1) horizontal shaft members 46 are welded between the two braces 42a and 42b. As a result, the two braces 42a and 42b have the required rigidity and the distance between them is maintained.

  8 and 9 show a mounting structure of the upper base end portion 42c of the two braces 42a and 42b and a pair of mounting pieces 49 and 49 provided on the flange 48. FIG. Here, FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. FIG. 9 is a left side view of the lower transmission member 40 showing the base end portions 42c of the two braces 42a and 42b. In this embodiment, as shown in FIGS. 8 and 9, a pair of attachment pieces 49, 49 are provided on the flange 48 so as to face each other with the base end portions 42 c of the two braces 42 a, 42 b interposed therebetween. . The base ends 42c of the two braces 42a and 42b are attached to the pair of attachment pieces 49 and 49, respectively.

  The flange 48 and the plate 14 provided so as to be orthogonal to the flange 48 are welded. Further, the flange 48 and the pair of attachment pieces 49, 49 are welded. Further, the pair of attachment pieces 49, 49 and the base end portions 42c of the two braces 42a, 42b are welded to each other.

  Moreover, as shown in FIG. 8, the two braces 42a and 42b are rectangular pillars having a rectangular cross section. The base ends 42 c of the two braces 42 a and 42 b are sandwiched between a pair of attachment pieces 49 and 49 provided on the flange 48. At this time, as shown in FIG. 8 and FIG. 9, a pair of side surfaces a and b opposed to each other in the cross section of the two braces 42 a and 42 b made of rectangular prismatic material are provided on the flange 48. The mounting pieces 49 and 49 are in contact with each other. And the base end part 42c of the two braces 42a and 42b and the pair of attachment pieces 49 and 49 are welded along the corners c1 to c4 of the side peripheral surfaces of the two braces 42a and 42b. .

  Further, in this embodiment, the portion where the side surfaces of the two braces 42a and 42b overlap with the edges d1 and d2 of the pair of mounting pieces 49 and 49 is along the edges d1 and d2 of the pair of mounting pieces 49 and 49. Are welded. Thereby, the two braces 42a and 42b and the pair of attachment pieces 49 and 49 are firmly welded.

<Horizontal shaft material 46>
In this embodiment, the horizontal shaft member 46 is spanned between the intermediate portions of the two braces 42a and 42b. The horizontal shaft member 46 is attached to the two braces 42a and 42b by pin engagement. FIG. 10 is a view showing a mounting structure between the horizontal shaft member 46 and the brace 42a, and is an end view taken along the line XX in FIG. 1 across the braces 42a and 42b.

  As shown in FIG. 1, the horizontal shaft member 46 is a shaft member that spans between two braces 42a and 42b. In this embodiment, the two braces 42a and 42b are disposed obliquely at an equal angle with respect to the flange 48, as shown in FIG. The base 44 and the horizontal shaft member 46 are bridged over the two braces 42a and 42b so as to be approximately parallel to the flange 48. Thus, in this embodiment, the two braces 42a and 42b, the base 44 and the horizontal shaft member 46 are arranged so as to construct an approximately isosceles trapezoid.

  Here, the base 44 is welded to the tips 43a and 43b (lower ends) of the two braces 42a and 42b. On the other hand, the horizontal shaft member 46 is attached to the two braces 42a and 42b by pin engagement. In this embodiment, as shown in FIG. 10, the horizontal shaft member 46 is composed of two long shaft members (in this embodiment, two long shaft plates). The horizontal shaft member 46 is opposed to the braces 42a, 42b on the front side and the back side (the front side and the back side of the rectangular frame 203) and is disposed so as to sandwich the two braces 42a, 42b. Both end portions 46a and 46b of the horizontal shaft member 46 are pin-engaged with the two braces 42a and 42b. In this embodiment, holes for inserting bolts are formed in both end portions 46a and 46b of the horizontal shaft member 46, holes are formed so as to correspond to the braces of the two braces 42a and 42b, and the bolts 47 are inserted. . Then, the braces 42a and 42b and the horizontal shaft member 46 are joined by pin connection using the bolt 47 as a pin. In this case, the joint portion of the horizontal shaft member 46 is allowed to rotate with respect to the braces 42a and 42b.

<Base 44>
As shown in FIG. 1, the base portion 44 spans between the ends (lower ends in the illustrated example) 43 a and 43 b of the two braces 42 a and 42 b and is attached to both of the two braces. In this embodiment, the base 44 is a horizontally long member and is welded to the tips 43a and 43b of the two braces 42a and 42b, respectively. As shown in FIG. 1, the base portion 44 is disposed along the upper surface of the base 60 and is attached to bolts extending upward from the base 60 (for example, anchor bolts 110 and bolts with washers 120 extending from the concrete foundation 202). It is fixed with nuts 66 and 69 (see FIGS. 12 and 13).

  Here, FIG. 11 is a plan view of the base 44. FIG. 12 is an exploded perspective view showing a mounting structure of the base 44. FIG. 13 is a perspective view showing a state in which the base 44 is attached to the base 60. As shown in FIGS. 11 and 12, the base portion 44 is formed by deforming the bottom surface portion 44a facing the tips 43a and 43b of the braces 42a and 42b, the side surface portions 44b and 44b rising from the bottom surface portion 44a, and the bottom surface portion 44a. And a reinforcing member 45 to be regulated. In this embodiment, the side surface portions 44b and 44b are erected so as to face each other from both ends in the width direction of the bottom surface portion 44a. The upper side of the base 44 and both sides in the length direction are open.

  The base 44 is a horizontally long member as shown in FIG. A plurality of bolt insertion holes 101, 102, and 103 are formed on the bottom surface portion 44 a of the base portion 44 in order to fix the base portion 44 to the base 60. Here, the bolt insertion hole 101 (anchor bolt insertion hole) is a hole through which the anchor bolt 110 extending from the concrete foundation 202 is inserted. The bolt insertion hole 102 (second bolt insertion hole) and the bolt insertion hole 103 (second bolt insertion hole) are holes through which other bolts different from the anchor bolt 110 extending from the concrete foundation 202 are inserted. Here, the bolt 120 with a washer attached to the base 60 is inserted into the bolt insertion hole 102 (second bolt insertion hole). In addition, the bolt 130 inserted into the base 60 from the bottom surface 44 a side of the base 44 is inserted into the bolt insertion hole 103 (second bolt insertion hole).

  In this embodiment, the anchor bolt insertion holes 101 are provided at at least two locations on both sides of the base portion 44. The anchor bolt insertion hole 101 is a long hole extending along the longitudinal direction of the base portion 44. Here, the long axis of the anchor bolt insertion hole 101 extends along the longitudinal direction of the base portion 44. Further, the portion where the anchor bolt insertion hole 101 is formed is reinforced by the reinforcing member 45.

<Reinforcing member 45>
The reinforcing member 45 is a member that restricts deformation of the bottom surface portion 44a. In this embodiment, the reinforcing member 45 is a rectangular steel plate having a required rigidity. The reinforcing member 45 is a member that restricts deformation of the bottom surface portion 44a, and may have a required rigidity, and is not necessarily limited to a steel plate. In this embodiment, the reinforcing member 45 is welded on the bottom surface portion 44 a of the base portion 44 in a state of being overlapped around the anchor bolt insertion hole 101. The reinforcing member 45 has a rectangular shape with a width that fits between the side surface portions 44 b and 44 b of the base portion 44. The reinforcing member 45 is placed on the bottom surface portion 44 a of the base portion 44, and the peripheral portions 451 and 452 are connected to the base portion 44. Welded. The anchor bolt insertion hole 101 is formed to communicate the reinforcing member 45 and the base portion 44.

  Further, in this embodiment, the anchor bolt insertion holes 101 through which the anchor bolts 110 are inserted are provided at at least two positions on both sides of the base portion 44. On the other hand, the second bolt insertion holes 102 and 103 through which other bolts different from the anchor bolt 110 (bolt with washer 120 and tightening bolt 130) are inserted are arranged inside the anchor bolt insertion hole 101. Yes. In this embodiment, the anchor bolt insertion hole 101 is a long hole extending along the longitudinal direction of the base portion 44. The second bolt insertion holes 102 and 103 are round holes.

<Assembly of base 44 and braces 42a, 42b>
The two braces 42a and 42b of the lower transmission member 40 are inserted between the side surface portions 44b and 44b of the base portion 44 and welded to the side surface portions 44b and 44b. In this embodiment, as shown in FIG. 1, the two braces 42 a and 42 b are welded to positions separated on both sides in the longitudinal direction of the base portion 44. The welded portions 44c of the side surface portions 44b and 44b of the base portion 44 are raised along the braces 42a and 42b, respectively. Thereby, the welding area of the base 44 and each brace 42a, 42b increases, and the base 44 and each brace 42a, 42b are firmly fixed.

  In this embodiment, as shown in FIG. 1, the base portion 44 is stretched over the lower ends 43 a and 43 b of the two braces 42 a and 42 b, and is disposed along the upper surface of the base 60. As shown in FIG. 11, anchor bolt insertion holes 101 are formed at both ends of the base portion 44 in the length direction. The second bolt insertion holes 102 and 103 are formed inside the anchor bolt insertion hole 101 in the length direction of the base portion 44.

  On the other hand, as shown in FIG. 12, anchor bolts 110 are embedded in the concrete foundation 202 in advance in accordance with the positions where the anchor bolt insertion holes 101 of the base portion 44 of the lower transmission member 40 are disposed. . A foundation packing 106 is disposed on the concrete foundation 202. The foundation 60 is disposed on the foundation packing 106. The base 60 is formed with a hole 64 through which the anchor bolt 110 is inserted in alignment with the anchor bolt 110 provided on the concrete foundation 202. A metal sleeve 82 is attached to the hole 64 to protect the hole 64. When the foundation 60 is installed on the concrete foundation 202, the anchor bolt 110 of the concrete foundation 202 is inserted into the sleeve 82 attached to the hole 64 of the foundation 60. Further, the base 60 is formed with a bolt insertion hole 68 in accordance with the second bolt insertion hole 102 formed in the base 44 of the lower transmission member 40. A bolt 120 with a washer is attached to the bolt insertion hole 68.

<Attachment structure of damping device 100 on damping wall 220>
The vibration control device 100 is disposed in a rectangular frame 203 surrounded by the second floor beam 50 of the building 200, the base 60, and the pillars 70a and 70b, and is attached to the base 60 and the second floor beam 50. It is attached.

  As shown in FIGS. 1 and 2, the upper transmission member 30 is attached to the second floor beam 50 by bolts 52. The base portion 44 of the lower transmission member 40 is attached to an anchor bolt 110 (an anchor bolt provided on the concrete foundation 202) penetrating the base 60 and a washer-attached bolt 120 provided on the base 60. A base 60 is installed on the anchor bolt 110 provided on the concrete foundation 202, and further, a base 44 is installed through the anchor bolt insertion hole 101, and a nut 66 (here, a double nut) is attached. In addition, a base 44 is installed through the second bolt insertion hole 102 and a nut 69 is attached to the bolt 120 with a washer penetrating the base 60 from the lower part toward the upper part. Furthermore, in this embodiment, the base 44 of the lower transmission member 40 is formed with a bolt insertion hole 103 on the inner side of the second bolt insertion hole 102 to which the washer-attached bolt 120 is attached, as shown in FIG. Yes. As shown in FIG. 1, a fastening bolt 130 (screw bolt) is attached to the bolt insertion hole 103 and screwed into the base 60. The base 44 is firmly attached to the base 60 by tightening the nuts 66 and 69 and the tightening bolt 130.

<Damping wall 220>
FIG. 14 shows the structure of the damping wall 220. FIG. 15 is an XV-XV cross section of FIG. 14 and shows an attachment structure of the restraining material 80 attached to the columns 70a and 70b. FIG. 16 is a partial cross-sectional view taken along the line XVI-XVI of FIG. 14, and is a side view of the vibration damping device 100 attached to the vibration damping wall 220. In this damping wall 220, as shown in FIG. 14, a restraining member 80 is further attached to the damping device 100 (see FIG. 1) attached to the rectangular frame 203. Here, the restraining member 80 is bridged between the two pillars 70a and 70b of the rectangular frame 203 so as to sandwich the two braces 42a and 42b of the vibration damping device 100 before and after the rectangular frame 203, respectively. Has been.

  In this embodiment, the restraining material 80 is a plurality of plate-like bars. And it is spanned over the two pillars 70a and 70b of the rectangular frame 203 at intervals in the height direction. The two pillars 70a and 70b are provided with steps 90 in which the restraining material 80 fits on the inner surface facing the inside of the rectangular frame 203, respectively.

  In this embodiment, receiving members 84 are attached to the inner side surfaces of the two columns 70a and 70b, respectively. The receiving member 84 is narrower than the columns 70a and 70b in the front-rear direction of the rectangular frame 203 (the thickness direction of the damping wall 220). Accordingly, the step 90 is constituted by a step between the pillars 70 a and 70 b and the receiving member 84. Here, the receiving member 84 is formed of a square member having a smaller width than the columns 70a and 70b. The receiving member 84 is shorter than the height of the pillars 70a and 70b. Further, in the front-rear direction of the rectangular frame 203 (the thickness direction of the damping wall 220), the receiving member 84 is narrower than the columns 70a and 70b and slightly smaller than the braces 42a and 42b of the damping device 100. wide. The receiving member 84 is attached along approximately the middle of the inner side surfaces of the columns 70a and 70b in the front-rear direction of the rectangular frame 203 (the thickness direction of the damping wall 220). Here, the square member as the receiving member 84 is fixed to the columns 70a and 70b. In this embodiment, the receiving member 84 is fixed to the columns 70a and 70b by nails or screws.

  As shown in FIG. 16, the restraining member 80 is disposed so as to sandwich the braces 42 a and 42 b of the vibration damping device 100 in the front-rear direction of the rectangular frame 203 (the thickness direction of the vibration damping wall 220). In other words, the restraining members 80 are provided so as to face each other in the front-rear direction of the rectangular frame 203 (the thickness direction of the damping wall 220). Here, both ends of the restraint member 80 are attached to a step 90 provided on the inner surface facing the inside of the rectangular frame 203. The restraint member 80 is fixed to the step 90 (here, the side surface of the receiving member 84) by a nail or a screw. The braces 42a and 42b of the vibration damping device 100 are sandwiched between restraining members 80 facing each other. Here, the gap between the restraining members 80 is slightly wider than the thickness of the two braces 42a and 42b in that direction. Since the gap between the restraining members 80 is slightly wider than the thickness of the braces 42a and 42b in the relevant direction, the construction is facilitated. Here, the gap S1 (see FIG. 15) between the restraint member 80 and the braces 42a and 42b is about 1 mm to 30 mm, preferably 2 mm or more, more preferably 2.5 mm or more, and preferably 25 mm or less. Preferably, it should be about 20 mm or less. For example, you may make it 3.0 mm or more and about 17.5 mm or less (for example, about 12.5 mm or less).

<Operation of Vibration Control Device 100>
FIGS. 17A and 17B show a state in which the second floor beam 50 and the base 60 are relatively displaced in the horizontal direction in the building 200 to which the vibration damping device 100 is attached. Here, FIG. 17A shows a state in which the second-floor floor beam 50 is displaced to the right with respect to the base 60, and FIG. 17B shows the second-floor floor beam 50 with respect to the base 60. The state displaced to the left is shown.

  In such a building 200, the second-story floor beam 50 and the base 60 shake with relative displacement in the horizontal direction during a large earthquake. When the second-floor floor beam 50 and the base 60 swing with relative displacement in the horizontal direction, the upper transmission member 30 attached to the second-floor floor beam 50 and the lower transmission member 40 attached to the base 60 A relative displacement occurs between the two. One plate (12, 13) of the damping unit 10 is connected to the upper transmission member 30. The other plate 14 of the vibration control unit 10 is connected to the lower transmission member 40. The one plate (12, 13) and the other plate 14 face each other. Viscoelastic bodies 18a and 18b are disposed between the opposing plates (12, 13) and 14, and are bonded to the plates (12, 13) and 14, respectively.

  When the upper transmission member 30 and the lower transmission member 40 are relatively displaced, relative displacement occurs between the plates (12, 13) and 14 facing the vibration control unit 10. When relative displacement occurs in the opposing plates (12, 13), 14, shear deformation occurs in the viscoelastic bodies 18a, 18b as shown in FIG. In the event of a large earthquake, the second floor beam 50 (upper transmission member 30) and plates (12, 13)) and the base 60 (lower transmission member 40) and plate 14) are accompanied by relative displacement in the horizontal direction. Shake. At this time, a repeated shear load is input to the viscoelastic bodies 18a and 18b.

  As shown in FIG. 7, the viscoelastic bodies 18 a and 18 b have resistance to a shear load, and when subjected to vibration accompanied by shear deformation, the viscoelastic bodies 18 a and 18 b have energy surrounded by the hysteresis loop A every cycle. The corresponding energy can be absorbed. For this reason, the vibration damping device 100 can suppress the shaking of the building 200 at the time of an earthquake, can attenuate the vibration at an early stage, and can reduce the degree of damage and damage caused to the building 200.

  Further, according to the vibration damping device 100, as shown in FIG. 1, the lower transmission member 40 extends from the portion (flange 48) connected to the plate 14 so that the distance between the members gradually increases. A base 44 that spans two braces 42a and 42b and tips 43a and 43b (lower ends) of the two braces 42a and 42b and is attached to both the two braces 42a and 42b, and a base 44 And an anchor bolt insertion hole 101 through which the anchor bolt 110 provided in the concrete foundation 202 of the building 200 to be attached is inserted. Anchor bolts 110 provided on the concrete foundation 202 are attached to the anchor bolt insertion holes 101 of the base 44. The base 44 of the lower transmission member 40 is fixed to the anchor bolt 110.

  Thus, the lower transmission member 40 is directly fixed to the anchor bolt 110 provided on the concrete foundation 202. The upper transmission member 30 is fixed to the second floor beam 50 (upper beam) of the building 200. When a large shaking occurs in the building 200, the lower transmission member 40 moves in accordance with the movement of the concrete foundation 202, whereas the upper transmission member 30 moves to the second floor beam 50 (upper beam) of the building 200. Moves accordingly. For this reason, an appropriate relative displacement is generated between the lower transmission member 40 and the upper transmission member 30 in accordance with the relative displacement between the concrete foundation 202 and the second floor beam 50.

  With respect to the vibration damping device 100, the present inventor has made various studies by actually attaching the vibration damping device 100 to the building 200 and conducting a vibration test. At that time, initially, the base 44 of the lower transmission member 40 is only attached to the base 60 by a bolt 120 with a washer provided on the base 60, and the anchor bolt 110 embedded in the concrete foundation 202 is attached to the anchor bolt 110. Was not attached. In this case, in the vibration test, there was an event in which the viscoelastic bodies 18a and 18b did not sufficiently obtain the function of absorbing vibration energy and the damping effect. When the inventor actually verified the vibration damping device 100 attached to the building 200, the base portion 44 of the lower transmission member 40 may move with respect to the base 60, such as being lifted with respect to the base 60. I noticed.

  Such an event is considered to occur due to the action of the resistance against deformation of the viscoelastic bodies 18a and 18b acting on the lower transmission member 40 during an earthquake. In other words, in this embodiment, the lower transmission member 40 has two braces 42a and 42b extending from the portion connected to the plate 14 so that the distance between them gradually increases. The base portion 44 is stretched over the tips 43a and 43b (lower ends) of the two braces 42a and 42b, and is attached to both the two braces 42a and 42b.

  For this reason, the lower transmission member 40 that receives a resistance against the deformation of the viscoelastic bodies 18a and 18b has two braces 42a and 42b extending from the portion connected to the plate 14 so that the distance between the lower transmission members 40a and 18b gradually increases. Through this, a force acts on the base 44. At this time, as shown in FIGS. 17A and 17B, a horizontal force F <b> 1 acts on a portion (flange 48) connected to the plate 14. Accordingly, the force F2 acts on the two braces 42a and 42b extending so that the distance between them gradually increases, so that the base 44 is pressed down on one side, and the force F3 is pulled up on the other side. Works.

  In this case, a large load acts on a joint portion between the flange 48 of the lower transmission member 40 and the upper base end portion 42c of the two braces 42a and 42b attached to the plate 14 of the vibration damping unit 10. . Furthermore, tensile and compressive axial forces act alternately on the braces 42a and 42b.

  At this time, if the axial force in the compression direction acting on the braces 42a and 42b is too large, a force acts to buckle the braces 42a and 42b. In this embodiment, the horizontal shaft member 46 spanned between the braces 42a and 42b is joined to the braces 42a and 42b by pin engagement. For this reason, the joint portion between the braces 42a and 42b and the horizontal shaft member 46 is allowed to rotate with respect to the shaking of the two braces 42a and 42b. For this reason, a bending force is unlikely to occur in the horizontal shaft member 46. Further, the distance between the two braces 42 a and 42 b is maintained by the horizontal shaft member 46. For this reason, the deformation of the two braces 42a and 42b is suppressed to a small level. For example, the braces 42a and 42b are prevented from buckling in the rectangular frame 203.

  That is, when the horizontal shaft member 46 is welded to the two braces 42a and 42b, the horizontal shaft member 46 and the braces 42a and 42b are rigidly connected, and the joint portion between the braces 42a and 42b and the horizontal shaft member 46 is rotated. Is not allowed. For this reason, a bending force acts on the horizontal shaft member 46 with respect to a minute displacement of the two braces 42a and 42b. Further, since the bending force acting on the horizontal shaft member 46 is also supported on the two braces 42a and 42b that support the horizontal shaft member 46, a bending moment acts on the portion where the horizontal shaft member 46 is joined. On the other hand, when the horizontal shaft member 46 is pin-engaged with the two braces 42a and 42b, the bending force generated in the horizontal shaft member 46 and the bending acting on the two braces 42a and 42b. The moment can be kept small. As described above, when the horizontal shaft member 46 is attached to maintain the distance between the two braces 42a and 42b, it is preferable that the horizontal shaft member 46 is pin-engaged with the braces 42a and 42b.

  Furthermore, in this embodiment, as shown in FIG. 14, a restraining member 80 is further attached to the damping device 100 (see FIG. 1) attached to the rectangular frame 203 as the damping wall 220. . The constraining member 80 has two pillars 70a of the rectangular frame 203 so as to sandwich the two braces 42a and 42b of the vibration damping device 100 before and after the rectangular frame 203 (in the thickness direction of the damping wall 220). , 70b.

  As described above, a large axial force in the compression direction can repeatedly act on the two braces 42a and 42b of the vibration damping device 100 during a large earthquake. In this case, the braces 42a and 42b are subjected to a large axial force that causes buckling deformation. In this embodiment, as shown in FIG. 16, the restraining material 80 is disposed on both sides of the damping wall 220 in the thickness direction so as to sandwich the two braces 42 a and 42 b of the damping device 100. For this reason, even when a large axial force in the compression direction acts on the braces 42a and 42b, the braces 42a and 42b are restrained by the restraint material 80 at the very initial stage where the braces 42a and 42b bend in the thickness direction of the damping wall 220. Is supported. For this reason, buckling of the two braces 42 a and 42 b in the thickness direction of the damping wall 220 is suppressed.

  Thus, a large axial force in the compression direction can repeatedly act on the two braces 42 a and 42 b of the vibration damping device 100 as the vibration damping wall 220. In this case, a large axial force that causes buckling deformation acts on the braces 42a and 42b. On the other hand, in this embodiment, as shown in FIGS. 1 and 14, the horizontal shaft member 46 attached to maintain the distance between the two braces 42a and 42b is changed with respect to the braces 42a and 42b. Pin engagement was used. Accordingly, the braces 42a and 42b are unlikely to buckle in the in-plane direction of the rectangular frame 203. Furthermore, in this embodiment, as shown in FIG. 16, on both sides in the thickness direction of the damping wall 220, the restraining material 80 is disposed so as to sandwich the two braces 42 a and 42 b of the damping device 100. Yes. In the braces 42 a and 42 b, buckling deformation in the thickness direction of the damping wall 220 is restricted by the restraining material 80. For this reason, buckling deformation of the two braces 42a and 42b is suppressed both in the in-plane direction of the damping wall 220 and in the thickness direction. Thereby, even at the time of a big earthquake, the damping device 100 functions appropriately, and the vibration of the building 200 can be attenuated at an early stage.

  In this embodiment, as shown in FIG. 14, the restraining material 80 is a plurality of plate-like bars. And it is spanned over the two pillars 70a and 70b of the rectangular frame 203 at intervals in the height direction. The configuration of the restraining material 80 is not limited to this, and a wide plate material may be provided. In addition, the damping device 100 is disposed in a space surrounded by the rectangular frame 203 and the restraining material 80. Although not shown, the space can be filled with a heat insulating material such as glass wool or urethane foam. In the damping wall 220, even when a heat insulating material such as glass wool or urethane foam is filled, the vibration generated in the building 200 during a large earthquake can be appropriately attenuated.

  In this embodiment, as shown in FIGS. 8 and 9, a pair of attachment pieces 49 and 49 are provided on the flange 48 so as to face each other with the base end portions 42 c of the two braces 42 a and 42 b interposed therebetween. ing. The base ends 42c of the two braces 42a and 42b are attached to the pair of attachment pieces 49 and 49, respectively. The base ends 42 c of the two braces 42 a and 42 b are attached in a state sandwiched between a pair of attachment pieces 49 and 49 provided on the flange 48. In this case, since a pair of mounting pieces 49, 49 provided on the flange 48 are mounted with the base ends 42c of the two braces 42a, 42b being sandwiched, it is relatively easy to process and assemble each member. It is.

  Such a joint is welded. That is, in this embodiment, the plate 14 of the damping unit 10 is provided so as to be orthogonal to the flange 48. The said plate 14 of the damping unit 10 and the flange 48 are welded. Further, the flange 48 and the pair of attachment pieces 49, 49 are welded. Further, the pair of attachment pieces 49, 49 and the base end portions 42c of the two braces 42a, 42b are welded to each other.

  More specifically, as shown in FIG. 8, the two braces 42 a and 42 b are rectangular pillars having a rectangular cross section, and the base end portions 42 c of the two braces 42 a and 42 b are provided on the flange 48. It is sandwiched between a pair of attachment pieces 49, 49. At this time, as shown in FIG. 8 and FIG. 9, a pair of side surfaces a and b opposed to each other in the cross section of the two braces 42 a and 42 b made of rectangular prismatic material are provided on the flange 48. The mounting pieces 49 and 49 are in contact with each other. And the base end part 42c of the two braces 42a and 42b and the pair of attachment pieces 49 and 49 are welded along the corners c1 to c4 of the side peripheral surfaces of the two braces 42a and 42b. . In this embodiment, the portions where the side surfaces of the two braces 42a and 42b overlap with the edges of the pair of attachment pieces 49 and 49 are welded along the edges d1 and d2 of the pair of attachment pieces 49 and 49.

  As described above, the two braces 42a and 42b and the pair of attachment pieces 49 and 49 sufficiently secure the welding location. Thereby, the flange 48 of the lower transmission member 40 and the upper base end portion 42c of the two braces 42a and 42b are firmly joined. Thereby, sufficient resistance can be exhibited with respect to the deformation | transformation of the viscoelastic bodies 18a and 18b which arise at the time of an earthquake.

  Other forms of the joint structure between the flange 48 of the lower transmission member 40 and the upper base end portion 42c of the two braces 42a and 42b are shown in FIGS. 18 and 19, for example. FIG. 18 is a perspective view showing a joint structure between the flange 48 of the lower transmission member 40 and the upper base end portion 42c of the two braces 42a and 42b in another embodiment. FIG. 19 is an exploded perspective view showing a structure before joining the flange 48 and the upper base end portion 42c of the two braces 42a and 42b. In the form shown here, the flange 48 of the lower transmission member 40 has a mounting piece 49 welded to the central portion in the width direction so as to extend downward along the longitudinal direction. On the other hand, as shown in FIG. 19, the upper base end part 42c of the two braces 42a and 42b is provided with notches 42c1 into which the attachment pieces 49 are fitted. Then, as shown in FIG. 18, a notch 42c1 provided in the upper base end portion 42c of the two braces 42a and 42b is fitted into the attachment piece 49 extending downward from the flange 48, and the notch 42c1 and the attachment The joint portion 49a with the piece 49 is welded.

  As described above, in the structure shown in FIGS. 18 and 19, one mounting piece 49 is provided on the flange 48, while the two braces 42a and 42b are formed with notches 42c1 into which the mounting pieces 49 are fitted. ing. Then, a notch 42c1 provided in the upper base end portion 42c of the two braces 42a and 42b is fitted into the attachment piece 49 extending downward from the flange 48, and a joint portion 49a between the notch 42c1 and the attachment piece 49 is formed. Welded.

  On the other hand, in the structure shown in FIGS. 8 and 9, the flange 48 is provided with a pair of attachment pieces 49, 49. Then, the base end portions of the two braces 42a and 42b are sandwiched and attached by the pair of attachment pieces 49 and 49. More specifically, of the two braces 42a and 42b made of rectangular prismatic material, a pair of side surfaces a and b opposed in the cross section are brought into contact with a pair of mounting pieces 49 and 49 provided on the flange 48. It was. The two braces 42a and 42b and the pair of attachment pieces 49 and 49 were welded along the corners c1 to c4 on the side peripheral surfaces of the two braces 42a and 42b. Furthermore, the two braces 42a and 42b and the pair of attachment pieces 49 and 49 were welded along the edges d1 and d2 of the pair of attachment pieces 49 and 49.

  In this structure, it is not necessary to provide the notch 42c1 (see FIG. 19) at the upper base end portion 42c of the two braces 42a and 42b. Furthermore, welding locations can be provided along the corners c1 to c4 of the side peripheral surfaces of the two braces 42a and 42b and the edges d1 and d2 of the pair of attachment pieces 49 and 49. Therefore, if the size of the mounting pieces 49, 49 provided on the flange 48 and the shape of the two braces 42a, 42b are approximately the same, the structure shown in FIGS. The flange 48 and the two braces 42a and 42b can be joined more firmly.

  In this way, by providing the flange 48 with a pair of mounting pieces 49 and 49 facing each other so as to sandwich the base end part 42c of the two braces 42a and 42b, the base end part 42c of the two braces 42a and 42b. Can be firmly attached to the flange 48. Here, the flange 48 and the plate 14 of the damping unit 10 are further welded. Moreover, the flange 48 and a pair of attachment pieces 49 and 49 are welded. Thereby, at the time of an earthquake, a pair of attachment pieces 49 and 49, the flange 48, and the plate 14 of the damping unit 10 are rigidly joined, and are displaced integrally. For this reason, at the time of an earthquake, appropriate deformation | transformation arises with the viscoelastic bodies 18a and 18b of the damping unit 10, and the damping device 100 functions more appropriately.

  Furthermore, the pair of attachment pieces 49, 49 and the base end portions 42c of the two braces 42a, 42b may be welded respectively. In this case, the two braces 42a and 42b may be prismatic prisms having a rectangular cross section. Thereby, a pair of attachment pieces 49 and 49 and the base end part 42c of two braces 42a and 42b are welded along the corner | angular parts c1-c4 of the side peripheral surface of two braces 42a and 42b. Can do. Furthermore, the part where the side surfaces of the two braces 42a and 42b overlap with the edges d1 and d2 of the pair of attachment pieces 49 and 49 can be welded along the edges d1 and d2 of the pair of attachment pieces 49 and 49. .

  Such a joint structure is a relatively simple structure in which a pair of mounting pieces 49, 49 are provided on the flange 48 of the lower transmission member 40, but the flange 48 of the lower transmission member 40 and the two braces 42a, 42b. It is possible to secure a large number of welded locations and more firmly join the two. Thereby, at the time of an earthquake, shear deformation can be appropriately produced by the viscoelastic bodies 18a and 18b, and the vibration damping device 100 can be functioned more effectively.

  Further, the base 44 receives a force such that one side in the longitudinal direction is pressed against the base 60 or pulled up from the base 60. At this time, as shown in FIGS. 17A and 17B, when one S is pressed against the base 60 at both ends in the longitudinal direction of the base 44, the other T is pulled up from the base 60. This alternates at both ends in the longitudinal direction of the base 44 for each period of vibration. For this reason, a considerable number of repeated loads act on both ends of the base 44 in the longitudinal direction during an earthquake.

  Therefore, in this embodiment, a greater force acts on the base portion 44 of the lower transmission member 40 particularly at both ends in the longitudinal direction. At this time, if the base portion 44 of the lower transmission member 40 moves or greatly deforms with respect to the base 60, appropriate shear deformation does not occur in the viscoelastic bodies 18a and 18b. For this reason, in the vibration test, it is considered that the function of absorbing vibration energy and the damping effect were not sufficiently obtained by the viscoelastic bodies 18a and 18b. Even when the shape of the lower transmission member 40 is not the above shape, the lower transmission member 40 receives a large load against the deformation of the viscoelastic bodies 18a and 18b. When the lower transmission member 40 moves or greatly deforms with respect to the base 60, appropriate shear deformation does not occur in the viscoelastic bodies 18a and 18b. For this reason, the viscoelastic bodies 18a and 18b may cause an event in which the function of absorbing vibration energy and the damping effect are not sufficiently obtained.

  The inventor provided the anchor bolt insertion hole 101 in the lower transmission member 40 based on the above knowledge. Then, the anchor bolt insertion hole 101 of the base portion 44 of the lower transmission member 40 is passed through the anchor bolt 110 provided on the concrete foundation 202 of the building 200 to be attached, and the base portion 44 of the lower transmission member 40 is installed on the base 60. did. Then, the base portion 44 of the lower transmission member 40 was fixed to the base 60 and the concrete foundation 202 by the nut 66. Thereby, the base 44 of the lower transmission member 40 is firmly fixed to the concrete foundation 202 and the base 60. And it can suppress very small that the said base 44 moves with respect to the base 60, or deform | transforms large. For this reason, more appropriate shear deformation occurs in the viscoelastic bodies 18a and 18b of the vibration suppression unit 10. And the function and damping effect which absorb vibration energy by viscoelastic body 18a, 18b are acquired more effectively.

  Furthermore, in this embodiment, as shown in FIGS. 1 and 2, the vibration damping device 100 includes opposed plates (12, 13) and 14, and viscoelastic bodies 18a and 18b. The viscoelastic bodies 18a and 18b are disposed between the opposing plates (12, 13) and 14, and bonded to the plates (12, 13) and 14, respectively. Further, the vibration damping device 100 includes an upper transmission member 30 and a lower transmission member 40. Here, the upper transmission member 30 is connected to one plate (12, 13) of the opposing plates (12, 13), 14. The lower transmission member 40 is connected to the other plate 14. The lower transmission member 40 includes two braces 42 a and 42 b and a base 44. The two braces 42a, 42b extend from the portions (flange 48) connected to the opposing plates (12, 13), 14 so that the distance between them gradually increases. And the base 44 is spanned at the front-end | tips 43a and 43b (lower end) of the two braces 42a and 42b, and is attached to both of the two braces 42a and 42b.

  As described above, in this embodiment, a considerable number of repeated loads act on both ends of the base portion 44 in the longitudinal direction, particularly during an earthquake. On the other hand, in the above-described embodiment, the anchor bolt insertion holes 101 are provided in at least two locations on both sides of the base portion 44 of the lower transmission member 40. Then, the anchor bolts 110 provided on the concrete foundation 202 are passed through the anchor bolt insertion holes 101 so that the two distant locations on both sides of the base portion 44 of the lower transmission member 40 are firmly fixed to the base 60. .

  In this case, the base portion 44 of the lower transmission member 40 is firmly fixed to the base 60 by the anchor bolts 110 provided on the concrete foundation 202 at at least two locations on both sides. For this reason, it is suppressed that the base 44 of the lower transmission member 40 moves or deforms with respect to the base 60 during an earthquake. Further, a metal sleeve 82 for protecting the hole 64 is attached to the hole 64 of the base 60 through which the anchor bolt 110 is inserted. The sleeve 82 protects the hole 64 of the base 60. For this reason, the base 60 is not easily displaced with respect to the anchor bolt 110 attached to the concrete foundation 202. Further, more appropriate shear deformation occurs in the viscoelastic bodies 18a and 18b of the vibration suppression unit 10, and the function of absorbing vibration energy and the damping effect are more effectively obtained by the viscoelastic bodies 18a and 18b.

  As described above, the base portion 44 of the lower transmission member 40 is attached to the anchor bolts 110 provided on the concrete foundation 202 at at least two locations apart on both sides. Further, a metal sleeve 82 for protecting the hole 64 is attached to the hole 64 of the base 60 through which the anchor bolt 110 is inserted. Thereby, the base 44 of the lower transmission member 40 is firmly fixed to the base 60 and the concrete foundation 202. Further, the base 44 of the lower transmission member 40 is reinforced by a reinforcing member 45. For this reason, the deformation of the base 44 is restricted. Thus, the base 44 to which the lower ends 43a and 43b of the two braces 42a and 42b of the lower transmission member 40 are attached is firmly fixed to the base 60 and the concrete foundation 202. On the other hand, at the time of a large earthquake, a large axial force acts on the upper base end portion 42c of the two braces 42a and 42b as a drag force that supports the deformation of the viscoelastic bodies 18a and 18b. For this reason, the force which acts on the two braces 42a and 42b becomes large.

  In this embodiment, the horizontal shaft member 46 disposed between the two braces 42a and 42b is pin-engaged with the braces 42a and 42b. In this case, since the horizontal shaft member 46 is pin-engaged with the braces 42a and 42b, rotation of the joint portion between the horizontal shaft member 46 and the braces 42a and 42b is allowed. For this reason, the bending force which acts on the horizontal shaft member 46 and the bending moment which acts on the braces 42a and 42b can be suppressed to be small.

  When a large earthquake occurs, a large force can act on the two braces 42a and 42b as described above. In this case, although the space | interval of braces 42a and 42b is maintained by the horizontal shaft material 46, the bending force which acts on the horizontal shaft material 46 and the bending moment which acts on braces 42a and 42b are restrained small. As a result, since the bending deformation generated in the horizontal shaft member 46 is suppressed to a small level, the deformation generated in the braces 42a and 42b is also suppressed small. Further, since the deformation of the braces 42a and 42b can be suppressed to a small level, the displacement of the plates (12 and 13) and 14 of the vibration control unit 10 can be increased. Thereby, more appropriate shear deformation occurs in the viscoelastic bodies 18a and 18b of the vibration suppression unit 10. And the function and damping effect which absorb vibration energy by viscoelastic body 18a, 18b are acquired more effectively.

  Further, the anchor bolt 110 for attaching the base 44 of the lower transmission member 40 of the vibration damping device 100 to the concrete foundation 202 corresponds to the distance between the anchor bolt insertion holes 101 provided in the base 44 of the lower transmission member 40. And is provided in advance. In this case, the anchor bolts 110 are provided on the concrete foundation 202 in accordance with the distance between the anchor bolt insertion holes 101 provided in the base 44 of the lower transmission member 40 of the vibration damping device 100. However, since the position where the anchor bolt 110 is provided is determined at the stage of constructing the concrete foundation 202, it cannot be corrected at the stage of constructing the base 60 or the vibration damping device 100.

  In this embodiment, the anchor bolt insertion hole 101 provided in the base 44 of the lower transmission member 40 is a long hole extending along the longitudinal direction of the base 44. Therefore, it becomes easy to attach the concrete foundation 202 of the lower transmission member 40 in accordance with the position of the anchor bolt 110 provided on the concrete foundation 202 at the stage of constructing the base 60 and the vibration damping device 100.

  Furthermore, in this embodiment, the reinforcement member which reinforces the site | part in which the anchor bolt insertion hole 101 was formed is provided. That is, in this embodiment, a reinforcing member 45 that restricts deformation of the portion is provided at a portion where the anchor bolt insertion hole 101 is formed in the bottom surface portion 44 a of the base portion 44 of the lower transmission member 40. As described above, the lower transmission member 40 is directly attached to the anchor bolt 110 provided on the concrete foundation 202.

  In this case, the portion where the anchor bolt insertion hole 101 is formed is firmly attached to the base 60. As shown in FIGS. 17A and 17B, a force F <b> 2 that presses the base 44 and a force F <b> 3 that pulls up the base 44 act alternately and repeatedly on the portion. Under such a force, the bottom surface portion 44a of the base portion 44 may be deformed in the portion. When the bottom surface portion 44a of the base portion 44 is deformed, appropriate shear deformation does not occur in the viscoelastic bodies 18a and 18b, and the function of absorbing vibration energy and the damping effect are more effectively obtained by the viscoelastic bodies 18a and 18b. Absent.

  In this embodiment, a reinforcing member 45 that reinforces a portion of the base portion 44 where the anchor bolt insertion hole 101 is formed is provided. Specifically, as shown in FIG. 12, the reinforcing member 45 is a reinforcing plate (first reinforcing plate 45) attached to a portion where the anchor bolt insertion hole 101 is formed in the bottom surface portion 44a of the base portion 44. For this reason, the site | part in which the anchor bolt insertion hole 101 of the bottom face part 44a of the base 44 was formed can be directly reinforced with the reinforcement member 45. FIG. Thereby, shear deformation is more appropriately generated in the viscoelastic bodies 18a and 18b, and the function of absorbing vibration energy and the damping effect are more effectively obtained by the viscoelastic bodies 18a and 18b.

  The reinforcing member 45 may be any member that can reinforce the portion where the anchor bolt insertion hole 101 of the bottom surface portion 44a of the base portion 44 is formed and restricts deformation of the bottom surface portion 44a. For this reason, it is not necessarily limited to the form mentioned above. Here, FIG. 20 is a figure which shows the other form of a reinforcement member. Here, as shown in FIG. 20, the reinforcing member 45A is provided between the bottom surface portion 44a facing the tips 43a and 43b (lower ends) of the braces 42a and 42b and the side surface portions 44b and 44b rising from the bottom surface portion 44a. This is a reinforcing plate (second reinforcing plate 45A) installed.

  Here, the second reinforcing plate 45A is welded with an edge portion 441 that overlaps the bottom surface portion 44a and edge portions 442 and 443 that overlap the side surface portions 44b and 44b, respectively. According to the second reinforcing plate 45A, the rigidity of the base portion 44 is increased at the portion where the second reinforcing plate 45A is disposed, and the deformation of the bottom surface portion 44a is suppressed to be small. Further, as described above, in this embodiment, the base portion 44 has a tendency that a large force repeatedly acts on both end portions in the longitudinal direction. For this reason, when the second reinforcing plates 45A are attached to both ends of the base portion 44 in the longitudinal direction, the second reinforcing plates 45A are effective in regulating the deformation of the base portion 44.

  Further, the reinforcing plate (second reinforcing plate 45A) installed between the side surface portions 44b and 44b rising from the bottom surface portion 44a is a reinforcing plate (first reinforcing plate 45) attached to the bottom surface portion 44a of the base portion 44. ). Thereby, the rigidity of the base portion 44 can be further increased, and deformation of the bottom surface portion 44a can be more effectively regulated. Thereby, shear deformation is more appropriately generated in the viscoelastic bodies 18a and 18b, and the function of absorbing vibration energy and the damping effect are more effectively obtained by the viscoelastic bodies 18a and 18b.

  Further, in this embodiment, as shown in FIGS. 1 and 11, second bolt insertion holes 102 and 103 through which other bolts 120 and 130 different from the anchor bolt 110 are inserted are provided in the base 44. As described above, not only the anchor bolt 110 but also other bolts 120 and 130 different from the anchor bolt 110 may be used in combination to fix the base portion 44 to the base 60. Accordingly, the base portion 44 can be firmly fixed by the base 60, and deformation of the base portion 44 can be suppressed to be small. Thereby, shear deformation is more appropriately generated in the viscoelastic bodies 18a and 18b, and the function of absorbing vibration energy and the damping effect are more effectively obtained by the viscoelastic bodies 18a and 18b.

  In addition, as described above, the anchor bolt insertion holes 101 are provided at two locations on both sides of the base 44, and the base 44 is separated on both sides by the anchor bolts 110 provided on the concrete foundation 202. Two places are firmly fixed. In this embodiment, as shown in FIG. 11, the second bolt insertion holes 102 and 103 into which other bolts 120 and 130 different from the anchor bolt 110 are inserted are arranged inside the anchor bolt insertion hole 101. Has been. For this reason, the inner side of both sides of the base fixed by the anchor bolt 110 is fixed to the base 60 by the other bolts 120 and 130 different from the anchor bolt 110. Thereby, the base 44 of the lower transmission member 40 is firmly attached to the base 60. As a result, shear deformation is more appropriately generated in the viscoelastic bodies 18a and 18b, and the function of absorbing vibration energy and the damping effect are more effectively obtained by the viscoelastic bodies 18a and 18b.

  Further, the bolts 120 and 130 attached to the second bolt insertion holes 102 and 103 are not embedded in the concrete foundation 202 but are attached to the base 60 when the base 60 is constructed. For this reason, since these bolts 120 and 130 can be attached to a position corresponding to a hole formed in the base portion 44 of the lower transmission member 40, they may be formed as round holes.

  As described above, the vibration damping device 100 is suitable as a vibration damping device that suppresses vibration generated in the building 200 and attenuates the vibration early.

  The damping wall 220 proposed here is surrounded by a second-floor floor beam 50 (upper beam), a base 60 (lower beam), and two columns 70a and 70b, as shown in FIGS. A rectangular frame 203 and a vibration damping device 100 housed in the rectangular frame 203 are provided. Here, the vibration damping device 100 is disposed between the opposing plates (12, 13) and 14 and the opposing plates (12, 13) and 14, and is bonded to the plates (12, 13) and 14, respectively. The first transmission member 30 (upper transmission member) connected to one plate (12, 13) of the viscoelastic bodies 18a, 18b, the opposed plates (12, 13), 14, and the other plate 14 And a connected second transmission member 40 (lower transmission member). Here, the second transmission member 40 (lower transmission member) is separated from the flange 48 on the flange 48 provided so as to be orthogonal to the plate 14 and on the surface of the flange 48 opposite to the plate 14. As the distance between the two braces 42a and 42b extends gradually, the two braces 42a and 42b are bridged over the tips 43a and 43b of the two braces 42a and 42b. And a base 44 attached thereto. Further, the damping wall 220 is provided with a restraining member 80 spanned between two pillars 70a and 70b so as to sandwich the two braces 42a and 42b before and after the rectangular frame 203. .

  In this case, as described above, the restraint member 80 is disposed so as to sandwich the two braces 42a and 42b of the vibration damping device 100 before and after the rectangular frame 203 (both sides in the thickness direction of the vibration damping wall 220). Has been. For this reason, even when a large axial force in the compression direction acts on the braces 42a and 42b, the braces 42a and 42b are restrained by the restraint material 80 at the very initial stage where the braces 42a and 42b bend in the thickness direction of the damping wall 220. Is supported. For this reason, buckling of the two braces 42 a and 42 b in the thickness direction of the damping wall 220 is suppressed.

  In this case, a horizontal shaft member 46 attached to the two braces 42a and 42b by pin coupling may be provided in an intermediate portion between the two braces 42a and 42b of the vibration damping device 100. Thereby, buckling deformation of two braces 42a and 42b can be prevented more effectively.

  Here, as shown in FIG. 1 and FIG. 10, two long-axis horizontal shaft members 46 are arranged so as to sandwich the braces 42a and 42b on the front side and the rear side of the braces 42a and 42b. The structure which pin-engaged both ends 46a and 46b of the material 46 to braces 42a and 42b was illustrated. The structure of the horizontal shaft member 46 is not limited to such a form.

  For example, FIG. 21 shows another form of the horizontal shaft material. In addition, FIG. 21 is a figure corresponding to the XX cross-sectional arrow view in FIG. The horizontal shaft member 46A shown in FIG. 21 is a member having a length that can fit into the gap between the braces 42a and 42b, and engagement pieces 46c and 46d are provided at both ends in the longitudinal direction of the horizontal shaft member 46A. The engagement pieces 46c and 46d extend so as to sandwich the braces 42a and 42b on the front side and the back side of the braces 42a and 42b. The bolts 47 penetrate through the engaging pieces 46c and 46d of the horizontal shaft member 46A and the braces 42a and 42b, respectively. The braces 42a and 42b and the horizontal shaft member 46A are joined by pin connection using the bolt 47 as a pin. In this case, the joint between the horizontal shaft member 46A and the braces 42a and 42b is allowed to rotate.

  FIG. 22 is a development view of the horizontal shaft member 46A. For example, as shown in FIG. 22, the horizontal shaft member 46A is formed by cutting a steel plate including engagement pieces 46c and 46d into a predetermined shape, and includes both side portions in a direction perpendicular to the longitudinal direction including the engagement pieces 46c and 46d. The both side portions 46e may be bent along the longitudinal direction (a chain line b in FIG. 22) so that 46e faces each other. In this case, as shown in FIG. 21, the horizontal shaft member 46A is connected in series on the front side and the back side of the braces 42a and 42b. For this reason, the rigidity of the horizontal shaft member 46A can be increased.

  Further, the engagement structure between the horizontal shaft member 46 and the braces 42a and 42b is not limited to the above-described form. For example, although not shown, a bracket (not shown) for attaching the horizontal shaft member 46A may be welded to the braces 42a and 42b, and the horizontal shaft member 46 may be attached to the bracket by pin engagement. . Further, the horizontal shaft member 46 and the braces 42a and 42b are illustrated as a structure in which the bolt 47 is used as a pin (see FIG. 1). Here, the joining structure of the horizontal shaft member 46 and the braces 42a and 42b may be joined by rivets.

  Further, in this embodiment, the two pillars 70a and 70b are provided with steps 90 in which the restraining material 80 is fitted on the inner side surface facing the inside of the rectangular frame 203, respectively. As shown in FIG. 15, the step 90 includes a receiving member 84 that is narrower than the columns 70 a and 70 b in the front-rear direction of the rectangular frame 203 (the thickness direction of the damping wall 220). It is attached to the inner side surface of 70b and provided on the side surface of the receiving member 84. The structure for attaching the restraining material 80 to the two pillars 70a and 70b is not limited to such a structure unless otherwise specified.

  In the above-described embodiment, the two braces 42 a and 42 b are arranged obliquely at an equal angle with respect to the flange 48. The base 44 and the horizontal shaft member 46 are bridged over the two braces 42a and 42b so as to be parallel to the flange 48. Unless specifically mentioned, the structures of the flange 48, the two braces 42a and 42b, the base 44 and the horizontal shaft member 46 are not limited to the structures shown in the above-described embodiments.

  Further, as shown in FIG. 1, the horizontal shaft member 46 has at least one on each side of the two braces 42a and 42b in the longitudinal direction across the center in the length direction of the two braces 42a and 42b. It is good to have one book at a time. By providing at least one horizontal shaft member 46 on both sides of the lengthwise center of the two braces 42a and 42b, the deformation of the braces 42a and 42b can be effectively suppressed. For example, in the embodiment described above, as shown in FIG. 1, two horizontal shaft members 46 are provided on the upper side in the length direction of the two braces 42a and 42b, and one horizontal member is provided on the lower side. A shaft member 46 may be provided. The arrangement and number of the horizontal shaft members 46 are not particularly limited to such a form. In addition, the horizontal shaft member 46 may be provided so as to span the center in the length direction of the two braces 42a and 42b.

  Further, as shown in FIG. 1, the building 200 is disposed on the above-described vibration damping device 100, the concrete foundation 202, the anchor bolt 110 installed in a state embedded in the concrete foundation 202, and the concrete foundation 202. And a base 60 attached to the anchor bolt 110. In the vibration damping device 100, when the lower transmission member 40 is arranged on the base 60, the anchor bolt insertion hole 101 of the lower transmission member 40 is attached to the anchor bolt 110 of the concrete foundation 202, and a nut 66 (here, double (See FIG. 12 and FIG. 13). Thereby, the lower transmission member 40 of the vibration damping device 100 is firmly fixed to the base 60. In this case, the lower transmission member 40 is difficult to move with respect to the base 60, and more appropriately causes shear deformation in the viscoelastic bodies 18a and 18b of the vibration damping device 100, and vibration energy is generated by the viscoelastic bodies 18a and 18b. The function of absorbing water and the attenuation effect can be obtained more effectively.

  In this case, the pullout strength of the anchor bolt 110 is 15 kN or more, more preferably 18 kN or more, and further preferably 20 kN or more. Thereby, it is possible to prevent the anchor bolt 110 to which the vibration damping device 100 is attached from being detached from the concrete foundation 202 at the time of a large earthquake, and to make the vibration damping device 100 function more reliably at the time of a large earthquake and to further damage the building 200. It can be suppressed slightly.

  The vibration damping device 100 according to the embodiment of the present invention has been described above, but the present invention is not limited to any of the above-described embodiments unless specifically mentioned.

10 Damping units 12, 13, 14 Plate 15 Flange 15a Insertion hole 17 Insertion hole 17a Bolt nut 18a, 18b Viscoelastic body 30 Upper transmission member (first transmission member)
32 Base 32a Bolt insertion holes 34a, 34b Mounting piece 40 Lower transmission member (second transmission member)
42a, 42b Brace 42c Upper base end portions 43a, 43b of two braces Lower end of brace (tip of brace)
44 Base 44a Bottom surface 44b Side surface 44c Welded portion 45 Reinforcing member (first reinforcing plate)
45A Reinforcement member (second reinforcement plate)
46, 46A Horizontal shaft material 47 Bolt 48 Flange 48a Bolt nut 49 Mounting piece 50 2nd floor floor beam (upper beam)
52 bolt 60 base (under beam)
64 holes (holes through which anchor bolts are inserted)
66, 69 Nut 68 Bolt insertion holes 70a, 70b Column 80 Restraining material 82 Sleeve 84 Receiving material 90 Step 100 Damping device 101 Anchor bolt insertion hole 102 Bolt insertion hole (second bolt insertion hole)
103 Bolt insertion hole (second bolt insertion hole)
105 Hole Down Bolt 106 Foundation Packing 110 Anchor Bolt 120 Washer Bolt 130 Tightening Bolt 150 Hole Down Hardware 200 Building 202 Concrete Foundation 203 Rectangular Frame 220 Damping Wall 441 Damping Wall 441 Edge of Second Reinforcement Plate 442 Overlaid on Base Bottom 443 Edges 451 and 452 of the second reinforcing plate that overlap with the side surface portion of the base portion.

Claims (9)

A rectangular frame surrounded by upper and lower beams and two pillars;
A damping wall comprising a damping device housed in the rectangular frame,
The vibration control device
An opposing plate;
A viscoelastic body disposed between the opposing plates and bonded to each plate;
A first transmission member connected to one of the opposing plates;
A second transmission member connected to the other plate of the opposing plates,
Of the first transmission member and the second transmission member, at least one transmission member is:
A flange provided to be orthogonal to the plate;
Two braces extending on the surface of the flange opposite to the plate so that the distance from each other gradually increases as the distance from the flange increases;
A base that spans the ends of the two braces and is attached to both of the two braces;
Before and after the rectangular frame, each of the two pillars is provided with a constraining material spanned so as to sandwich the two braces.
The damping wall according to claim 1.   The damping wall according to claim 1, wherein the constraining material is a plate material.   2. The damping wall according to claim 1, wherein the constraining material is a plurality of plate-like bars, and is spanned between the two pillars at intervals in the height direction.   4. The damping wall according to claim 2, wherein the two pillars are each provided with a step in which the plate-like restraining material fits on an inner surface facing the inside of the rectangular frame.   The said level | step difference was provided by attaching the receiving material narrower than the said pillar to the said inner surface of the said two pillars in the front-back direction of the said rectangular frame. wall.   The gap between the restraining members provided in front of and behind the rectangular frame in the front-rear direction of the rectangular frame is a little wider than the thickness in the front-rear direction of the two braces. Damping wall described in one item.   The damping wall according to claim 6, wherein a gap S1 between the restraining material and the brace is about 1 mm or more and 30 mm or less.   A building having a damping wall according to any one of claims 1 to 7.   The upper beam of the damping wall is a second-floor beam, the lower beam is a base disposed on a concrete foundation and attached to an anchor bolt, and the column is erected on the base, The building according to claim 8, wherein the building is a pillar supporting a second-floor floor beam.

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