JP2014020114A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device capable of more reliably developing a vibration control function.SOLUTION: The vibration control device includes viscoelastic bodies 18a, 18b arranged between opposed plates 12, 14, a first transmission member 30 connected to one plate 12, and a second transmission member 40 connected to the other plate 14. One transmission member 40 includes a flange 48 provided perpendicular to the plate 14, two braces 42a, 42b extending from the face of the flange 48 on the opposite side to the plate 14 in the state that a distance therebetween is gradually longer as departing from the flange 48, and a pair of mounting pieces 49, 49 provided on the flange 48 in the state of opposing each other across base ends 42c of the two braces 42a, 42b, and mounted with the base ends 42c of the two braces 42a, 42b, respectively.

Description

  The present invention relates to a vibration damping device.

  A vibration damping device attached to 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 configuration is proposed for the vibration damping device that can more reliably obtain the vibration damping function.

  The vibration damping device proposed here is an opposing plate, a viscoelastic body disposed between the opposing plates, and bonded to each plate, and a first plate connected to one of the opposing plates. A transmission member and a second transmission member connected to the other plate of the opposing plates are provided. 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. The two braces extending so as to gradually increase the distance between the two braces are provided on the flange so as to face each other with the base ends of the two braces sandwiched therebetween, and the base ends of the two braces are respectively attached. A pair of attachment pieces, and a base portion that is spanned around the ends of the two braces and attached to both of the two braces.

  Here, the flange and the plate provided so that the flanges are orthogonal to each other may be welded, and further, the flange and the pair of attachment pieces may be welded. Further, the pair of attachment pieces and the base end portions of the two braces may be welded respectively.

  The two braces are prismatic prisms having a rectangular cross section, and the pair of attachment pieces and the base ends of the two braces are welded along the corners of the side peripheral surfaces of the two braces. May be. Furthermore, the site | part which the side surface of two braces and the edge of a pair of attachment piece overlap may be welded along the edge of a pair of attachment piece.

  The building proposed here has the above-described vibration damping device housed in a rectangular frame surrounded by an upper beam, a lower beam, and two columns, and the first transmission member and the second transmission member Among them, one transmission member provided with two braces and a base is attached to the lower beam, and the other transmission member is attached to the upper beam. Here, the upper beam may be a second floor beam, and the lower beam may be a base disposed on a concrete foundation and attached to an anchor bolt. In this case, the base part of one transmission member is good to be fixed to the anchor bolt.

The figure which shows the damping device which concerns on one Embodiment of this invention. The figure which expanded the damping unit of the damping device concerning one embodiment of the present invention. The front view of the damping unit of the damping device concerning one embodiment of the present invention. The bottom view of the damping unit of the damping device concerning one embodiment of the present invention. The side view of the damping unit of the damping device concerning one embodiment of the present invention. 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 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. (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 modification of a reinforcement member.

  Hereinafter, a vibration damping device 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.

<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 (second transmission member) as a second transmission member. I have. FIG. 2 is an enlarged view of the vibration damping unit 10. 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, and the vibration damping device 100 is attached to the first floor of the building 200. Here, the lower beam 60 is specifically the base 60 attached to the concrete foundation 202 with anchor bolts. Further, the upper beam 50 is a second-floor beam. The vibration damping device 100 is attached to a rectangular frame 203 surrounded by the base 60, the second floor beam 50, and the first floor pillars 70 a and 70 b of the building 200 that rise from the base 60 and support the second floor beam 50. It has been. In this embodiment, a hole down hardware 150 is attached to the pillars 70 a and 70 b and attached 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>
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. 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. 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. In this embodiment, as shown in FIGS. 3 and 5, when viewed from the normal direction, one side of the plate 14 overlaps the region where the plate 12 and the plate 13 overlap, and the opposite side of the plate 14 is , Which protrudes from the area. Further, both sides of the plate 12 and the plate 13 protrude from the region where the plates 14 overlap each other.

  Insertion holes 17 for inserting bolts are formed on both sides of the plate 12 and the plate 13 protruding from the region where the plates 14 overlap. 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. 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) of the pair of opposed plates (12, 13) and 14 of the vibration suppression unit 10 and the second floor beam 50. It is a member. 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 gap between the two attachment pieces 34a and 34b so that the plate 14 can swing with a required amplitude.

<Lower transmission member 40>
The lower transmission member 40 is a member connected to the other plate 14 and the base 60 of the pair of plates (12, 13) and 14 facing the vibration control unit 10. 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. In this embodiment, a plurality of (three in the example shown in FIG. 1) bridges 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.

  Here, FIG. 8 and FIG. 9 show a mounting structure of the base end portion 42c of the two braces 42a and 42b and the pair of mounting pieces 49 and 49. 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.

<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 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. 11 and 12).

  Here, FIG. 10 is a plan view of the base 44. FIG. 11 is an exploded perspective view showing a mounting structure of the base 44. FIG. 12 is a perspective view showing a state in which the base 44 is attached to the base 60. As shown in FIGS. 10 and 11, 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.

  As shown in FIG. 10, the base portion 44 is a horizontally long member, and a plurality of bolt insertion holes 101, 102, and 103 are formed on the bottom surface portion 44 a in order to fix the base portion 44 to the base 60. Here, the bolt insertion hole 101 (anchor bolt insertion hole) is inserted with the anchor bolt 110 extending from the concrete foundation 202. 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. In this embodiment, 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 edge portions 451 and 452 are welded to the base portion 44, respectively. 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, these 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 a member that spans 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. 10, the base 44 has anchor bolt insertion holes 101 formed at both ends 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.

  In contrast, as shown in FIG. 11, anchor bolts 110 are embedded in the concrete foundation 202 in advance in accordance with the position where the vibration damping device 100 is 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 for protecting the hole 64 is attached to the hole 64, and the anchor bolt 110 is inserted through the sleeve 82. 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.

<Mounting structure of damping device 100>
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 columns 70a and 70b, and is attached to the base 60 and the second floor beam 50. ing.

  As shown in FIGS. 1 and 2, the upper transmission member 30 is attached to the second floor beam 50 by a bolt 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. Here, an anchor bolt 110 provided in the concrete foundation 202 and passing through the base 60 is passed through the anchor bolt insertion hole 101 of the base portion 44, and a nut 66 (here, a double nut) is attached. Further, a nut 69 is attached through a second bolt insertion hole 102 of the base portion 44 through a washer bolt 120 extending through the base 60 from the lower part to the upper part and extending above the base 60. Further, in this embodiment, the base 44 of the lower transmission member 40 is formed with a bolt insertion hole 103 inside 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, the tightening bolt 130 (screw bolt) is screwed into the base 60 through the bolt insertion hole 103. The base 44 is firmly attached to the base 60 by tightening the nuts 66 and 69 and the tightening bolt 130.

  FIGS. 13A and 13B 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. 13A shows a state in which the second floor beam 50 is displaced to the right with respect to the base 60, and FIG. 13B shows a state in which the second floor beam 50 is on the left side with respect to the base 60. Shows the displaced state.

  In such a building 200, the second floor beam 50 and the base 60 shake with relative displacement in the horizontal direction during a large earthquake. When the second 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 beam 50 and the lower transmission member 40 attached to the base 60 Relative displacement occurs. 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. During a large earthquake, the second floor beam 50 (upper transmission member 30) and the plates (12, 13)) and the base 60 (lower transmission member 40) and the plate 14) sway with relative displacement in the horizontal direction. . 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. The anchor bolt 110 provided on the concrete foundation 202 is attached to the anchor bolt insertion hole 101 of the base 44, and the base 44 of the lower transmission member 40 is directly fixed to the anchor bolt 110 provided on the concrete foundation 202. Has been.

  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. For this reason, when the big shaking arises 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 is the second floor beam 50 (upper beam) of the building 200. It moves according to. For this reason, an appropriate relative displacement is generated between the lower transmission member 40 and the upper transmission member 30 according to the relative displacement between the concrete foundation 202 and the second floor beam 50.

  That is, the inventor conducted various studies on the vibration damping device 100 by actually attaching the vibration damping device 100 to the building 200 and performing 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. 13A and 13B, 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. .

  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. As described above, the base ends 42 c of the two braces 42 a and 42 b are attached in a state of being sandwiched between the 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 flange 48 and the plate 14 of the vibration suppression unit 10 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. 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.

  For example, FIGS. 14 and 15 show 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. FIG. 14 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. 15 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. 15, the upper base end portion 42c of the two braces 42a and 42b is provided with a cut 42c1 into which the attachment piece 49 is fitted. Then, as shown in FIG. 14, a notch 42c1 provided in the base end portion 42c on the upper side of the two braces 42a and 42b is fitted into an 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.

  Thus, in the structure shown in FIGS. 14 and 15, one mounting piece 49 is provided on the flange 48, and on the other hand, the two braces 42 a and 42 b are formed with cuts 42 c 1 into which the mounting piece 49 is 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. 15) 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. 13A and 13B, 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.

  Based on the above knowledge, the present inventor provided the lower transmission member 40 with 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. 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 in the concrete foundation 202, and the base portion 44 of the lower transmission member 40 is fixed to the concrete foundation 202 by the nut 66. . As a result, the base 44 of the lower transmission member 40 is firmly fixed to the concrete foundation 202 and the base 60, and it is possible to suppress the movement and large deformation of the base 60 from the base 60 extremely small. 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, an upper transmission member 30 and a lower transmission member 40 are provided. 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, 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.

  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 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 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 is formed is firmly attached to the base 60. As shown in FIGS. 13A and 13B, 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 is formed is provided. Specifically, as shown in FIG. 11, 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 44 a 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. 16 is a diagram illustrating a modification of the reinforcing member. Here, as shown in FIG. 16, 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.

  In this embodiment, as shown in FIGS. 1 and 10, 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 portion 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. 10, 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 it early as shown in FIG.

  Further, as shown in FIG. 1, the proposed building 200 includes a vibration damping device 100, a concrete foundation 202, an anchor bolt 110 installed in a state embedded in the concrete foundation 202, and a concrete foundation. And a base 60 mounted on the anchor bolt 110. This building 200 includes the vibration damping device 100 described above. 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 (Refer to FIG. 11 and FIG. 12). 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.

DESCRIPTION OF SYMBOLS 10 Damping unit 12, 13, 14 Plate 15 Flange 15a Insertion hole 17 Insertion hole 17a Bolt nut 18a, 18b Viscoelastic body 30 Upper transmission member 32 Base 32a Bolt insertion hole 34a, 34b Mounting piece 40 Lower transmission member 42a, 42b Brace 42c Upper base end portions 43a and 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 Bridge 48 Flange 48a Bolt nut 49 Mounting piece 50 Second floor beam (upper beam)
52 bolt 60 base (under beam)
64 hole 66 nut 68 bolt insertion hole 70a, 70b pillar 80 bolt insertion hole 82 sleeve 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 441 Edges 442 and 443 of the Second Reinforcement Plate that Overlaps the Bottom of the Base Edge portions 451 and 452 of the second reinforcing plate that overlap with the peripheral portion of the reinforcing member 45

Claims (7)

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 pair of mounting pieces provided on the flange so as to face each other with the base end portions of the two braces sandwiched therebetween, to which the base end portions of the two braces are respectively attached;
A vibration control device comprising: a base portion that spans the ends of the two braces and is attached to both of the two braces.   The vibration damping device according to claim 1, wherein the flange and a plate provided so that the flanges are orthogonal to each other are welded, and the flange and the pair of attachment pieces are welded. .   The vibration damping device according to claim 2, wherein the pair of attachment pieces and the base end portions of the two braces are welded to each other. The two braces are prismatic prisms having a rectangular cross section,
4. The vibration damping device according to claim 3, wherein the pair of attachment pieces and the base end portions of the two braces are welded along corners of side peripheral surfaces of the two braces.   5. The vibration damping device according to claim 4, wherein a portion where a side surface of the two braces overlaps with an edge of the pair of attachment pieces is welded along an edge of the pair of attachment pieces. The vibration damping device according to any one of claims 1 to 5,
One of the first transmission member and the second transmission member provided with the two braces and the base is housed in a rectangular frame surrounded by an upper beam, a lower beam, and two columns. A building in which the transmission member is attached to the lower beam and the other transmission member is attached to the upper beam.   The upper beam is a second floor beam, the lower beam is a base placed on a concrete foundation and attached to an anchor bolt, and the base of the one transmission member is fixed to the anchor bolt. The building described in 6.

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