WO2019097933A1

WO2019097933A1 - Vibration control device

Info

Publication number: WO2019097933A1
Application number: PCT/JP2018/038494
Authority: WO
Inventors: 佐々木　和彦
Original assignee: オイレス工業株式会社
Priority date: 2017-11-14
Filing date: 2018-10-16
Publication date: 2019-05-23
Also published as: KR102602629B1; JP2019090217A; TW201930746A; JP6854232B2; TWI675971B; KR20200077465A

Abstract

Provided is a vibration control device in which a vibration damping function effectively acts both when vibration displacement is large and when vibration displacement is small. This vibration control device 10 is provided on a structure 1 including a lower beam part 2 and an upper beam part 3. The vibration control device 10 is provided with a viscous damper 11, a friction damper 30, and a switching mechanism 40 that switches between vibration damping by only the viscous damper 11 and vibration damping by a combination of the viscous damper 11 and the friction damper 30. The switching mechanism 40 is provided with: first members 41 provided on a viscous fluid container 12; and second members 42 which are provided on a friction transmission plate 31 so as to face the horizontal movement direction of the first members 41, and which come into contact with the first members 41 when the horizontal displacement of the viscous fluid container 12 with respect to the friction transmission plate 31 exceeds a first predetermined gap L1, thereby moving the friction transmission plate 31 together with the viscous fluid container 12 in the horizontal direction.

Description

Vibration control equipment

The present invention relates to a vibration control device provided in a structure including a lower beam and an upper beam.

Conventionally, in a structure such as a building, in order to improve its damping performance, a vibration control device that damps horizontal vibration is installed. For example, in the case of a building, a vibration control device is provided between the horizontally extending lower beam and the upper beam.

As such a vibration control device, a viscous damper that damps horizontal vibration using a viscous fluid with viscosity, and a hysteresis type that damps horizontal vibration using a lead-plug isolation rubber that has restoring force There is known a composite vibration control device provided with a damper (see, for example, Patent Document 1).

The vibration control device of Patent Document 1 includes a viscous damper and a hysteresis type damper. The viscous damper includes a viscous fluid container provided on the lower beam, a viscous fluid stored in the viscous fluid container, and a lower part suspended from the upper beam to be immersed in the viscous fluid and horizontal to the viscous fluid container. And a moving resistance plate. The hysteresis type damper is provided with a lead plug-filled base isolation rubber whose one end surface is fixed to the resistance plate, and a fixing plate which fixes the other end face of the lead plug-containing base isolation rubber and the outer surface of the viscous fluid container.

When a horizontal vibration acts on a building, the viscous fluid container vibrates horizontally with respect to the resistance plate. In a viscous damper, the viscous fluid between the inner surface of the viscous fluid container and the resistance plate damps horizontal vibrations of the viscous fluid container relative to the resistance plate. In the hysteresis damper, a lead-plug isolation rubber interposed between the outer surface of the viscous fluid container and the resistance plate via the fixed plate damps horizontal vibration of the viscous fluid container relative to the resistance plate.

JP 2001-248326 A

According to the vibration control device of Patent Document 1, the viscous damper and the hysteresis damper are provided. However, hysteresis-type dampers are harder (large loads even with small displacements) compared to viscous dampers, and therefore exhibit damping functions when vibration displacement is large (large loads), but with micro-vibrations (small loads) It can not damp the vibration without deformation. Therefore, when the viscous damper and the hysteresis damper are provided in parallel, the damping performance is degraded when the displacement of the vibration is small.
An object of the present invention is, in view of the problems of the prior art, to provide a vibration control apparatus in which the vibration damping function is effective both when the displacement of the vibration is large and when the displacement is small.

[1] A vibration control system according to a first aspect of the present invention,
A vibration control device provided in a structure including a lower beam portion and an upper beam portion,
A viscous damper that damps horizontal vibration of the lower beam portion and the upper beam portion with viscosity, and a frictional force that is connected to the viscous damper and causes horizontal vibration of the lower beam portion and the upper beam portion A friction damper for damping, and a switching mechanism for switching between vibration damping by the viscosity damper alone and vibration damping by the combination of the viscosity damper and the friction damper;
The viscous damper is suspended in a viscous fluid container fixed on the lower beam, a viscous fluid stored in the viscous fluid container, and fixed to the upper beam and dipped in the viscous fluid. And a resistance plate moving horizontally with respect to the viscous fluid container,
The friction damper includes a friction transmission plate provided so as to be horizontally movable with respect to the resistance plate, and a friction force generator provided between the friction transmission plate and the resistance plate of the viscous damper,
The switching mechanism includes a first member provided to the viscous fluid container, and a second member provided to the friction transmission plate opposite to the horizontal movement direction of the first member, and the switching mechanism is directed to the friction transmission plate When the horizontal displacement of the viscous fluid container exceeds the first predetermined interval between the horizontal end of the first member and the end of the second member opposite to the end, the first member is pressed against the first member The friction transfer plate is moved horizontally with respect to the resistance plate together with the viscous fluid container by being in contact with each other.

According to the vibration control device of the configuration, horizontal vibration of the lower beam portion and the upper beam portion can be damped by the viscous damper and the friction damper. Specifically, on the viscosity damper side, when the resistance plate suspended in a state fixed to the upper beam portion moves horizontally to the viscous fluid container fixed on the lower beam portion, the viscous fluid container The viscous fluid stored therein damps horizontal vibrations of the resistance plate relative to the viscous fluid container.

Also, on the friction damper side, when the friction transfer plate moves in the horizontal direction with respect to the resistance plate, the friction force generating portion provided between the friction transfer plate and the resistance plate causes the horizontal direction of the resistance plate to the friction transfer plate The earthquake's vibration is attenuated. Here, the switching mechanism is configured such that the horizontal displacement of the viscous fluid container with respect to the friction transfer plate exceeds a first predetermined distance between the horizontal end of the first member and the end of the second member facing the end. Sometimes, the first member provided in the viscous fluid container abuts on the second member provided in the friction transfer plate, and the friction transfer plate moves horizontally with the viscous fluid container.

Therefore, when the displacement of the vibration is small and the horizontal displacement of the viscous fluid container with respect to the friction transmission plate is equal to or less than the first predetermined interval, the first member does not abut the second member and the friction transmission plate is in the horizontal direction. Since it does not move, the friction damper does not work, and only the viscous damper works effectively. When the displacement of the vibration increases and the horizontal displacement of the viscous fluid container with respect to the friction transmission plate exceeds the first predetermined interval, the first member abuts on the second member and the friction transmission plate is in the horizontal direction. As it moves, the friction damper also works, and as a result, both the friction damper and the viscosity damper work effectively. That is, when the displacement of the vibration is small, only the viscous damper works, and when the displacement of the vibration is large, both the viscous damper and the friction damper work. Thus, the vibration damping function can be effectively used both when the displacement of the vibration is large and small.

[2] Further, in the vibration control device of the present invention,
In the switching mechanism,
The friction transfer plate is disposed above the viscous fluid container,
The first member is a first convex portion protruding toward the friction transmission plate from an upper portion of the viscous fluid container,
The second member is a second convex portion that protrudes toward the viscous fluid container from the lower portion of the friction transfer plate,
It is preferable that a plurality of the first convex portions and the second convex portions are alternately arranged at predetermined intervals in the horizontal movement direction of the first convex portions.

According to the vibration control device of the configuration, the first member is a first convex portion that protrudes from the upper portion of the viscous fluid container toward the friction transmission plate disposed above, and the second member is the lower portion of the friction transmission plate And the first convex portion and the second convex portion are alternately arranged at predetermined intervals, so that the first convex portion is in the horizontal direction. When moving, it is possible to switch from damping of seismic intensity only by the viscous damper to damping of vibration including the friction damper by contacting the second convex portion at a plurality of locations.

[3] In the vibration control device of the present invention,
It is preferable that the switching mechanism includes a buffer mechanism that reduces a collision between the first convex portion and the second convex portion at a portion where the first convex portion and the second convex portion abut.

According to the vibration control apparatus of the said structure, contact with a 1st convex part and a 2nd convex part can be performed smoothly by a buffer mechanism.

[4] The vibration control system of the second aspect of the present invention is
A vibration control device provided in a structure including a lower beam portion and an upper beam portion,
A viscous damper that damps horizontal vibration of the lower beam portion and the upper beam portion with viscosity, and a frictional force that is connected to the viscous damper and causes horizontal vibration of the lower beam portion and the upper beam portion A friction damper for damping, and a switching mechanism for switching between vibration damping by the viscous damper alone and vibration damping by the friction damper alone;
The viscous damper includes a viscous fluid container fixed on the lower beam portion, a viscous fluid stored in the viscous fluid container, and a friction transfer plate suspended in a state fixed to the upper beam portion. And a resistance plate which is suspended from the friction transfer plate via the friction damper and immersed in the viscous fluid and horizontally moves relative to the viscous fluid container.
The friction damper includes the friction transmission plate, the resistance plate provided so as to be horizontally movable with respect to the friction transmission plate, and a friction force generating portion provided between the resistance plate and the friction transmission plate. Equipped
The switching mechanism is provided in the viscous fluid container through the through hole formed to penetrate the resistance plate and the through hole, and the horizontal displacement of the viscous fluid container with respect to the resistance plate is (1) A passing member for moving the resistance plate horizontally with the viscous fluid container relative to the friction transmission plate by abutting on the edge of the through hole when the predetermined distance is exceeded It is characterized by

According to the vibration control device of the configuration, horizontal vibration of the lower beam portion and the upper beam portion can be damped by the viscous damper and the friction damper. Specifically, on the viscosity damper side, when the resistance plate suspended from the upper beam via the friction damper moves horizontally with respect to the viscous fluid container fixed on the lower beam, the viscous fluid container The viscous fluid stored therein damps horizontal vibrations of the resistance plate relative to the viscous fluid container.

Also, on the friction damper side, when the friction transfer plate moves in the horizontal direction with respect to the resistance plate, the friction force generating portion provided between the friction transfer plate and the resistance plate causes the horizontal direction of the resistance plate to the friction transfer plate The earthquake's vibration is attenuated. Here, when the horizontal displacement of the viscous fluid container with respect to the resistance plate exceeds the first predetermined distance, the switching mechanism is the edge of the through hole provided in the resistance plate with the passage member provided in the viscous fluid container. The resistance plate moves horizontally with the viscous fluid container.

Therefore, when the vibration velocity and displacement are small and the horizontal displacement of the viscous fluid container with respect to the resistance plate is less than the first predetermined distance, the passing member does not abut the edge of the through hole and the resistance plate is the viscous fluid container The friction damper does not work, and only the viscous damper works effectively. When the vibration velocity and displacement increase and the horizontal displacement of the viscous fluid container with respect to the resistance plate exceeds the first predetermined distance, the passing member abuts against the edge of the through hole and the resistance plate becomes viscous fluid. Since it moves horizontally with the container, only the friction damper is effective without the viscous damper being effective. That is, when the velocity and displacement of the vibration are small, only the viscous damper effective for vibrations with small velocity and displacement works, and when the velocity and displacement of the vibration are large, the effective friction damper works for vibrations with large velocity and displacement. Thus, the vibration damping function can be effectively used both when the velocity and displacement of the vibration are large and small.

[5] Further, in the vibration control device of the present invention,
In the switching mechanism,
The passage member is a bulge preventing bolt that prevents the viscous fluid container from swelling.
It is preferable that the through hole is a relief elongated hole of the bulge preventing bolt.

According to the vibration control device of the configuration, the switching mechanism uses the expansion prevention bolt for preventing expansion of the viscous fluid container and the escape long hole of the expansion prevention bolt, so that the structure can be simplified. .

[6] In the vibration control device of the present invention,
It is preferable that the switching mechanism includes a buffer mechanism that reduces the collision between the passing member and the edge of the through hole at a portion where the passing member abuts the edge of the through hole.

According to the vibration control apparatus of the said structure, contact with the edge of a passage member and a through-hole can be smoothly performed by a buffer mechanism.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows notionally the vibration control apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows the damping device of FIG. 1 typically. The action view in the state without the displacement by the vibration in the vibration control apparatus of FIG. The action view in the state where displacement by vibration is small in the vibration control device of FIG. The action view in the state where displacement by vibration is large in the vibration control device of FIG. The figure which shows the relationship between the damping force of a state with a small displacement by vibration in the damping device of FIG. 1, and displacement. The figure which shows the relationship between the damping force of a state with a large displacement by vibration in the damping device of FIG. 1, and displacement. The figure which shows the relationship between the damping force of the state in which the displacement by vibration in the damping device of FIG. 1 is large, and displacement. It is a front view which shows the vibration control apparatus which concerns on 2nd Embodiment of this invention. It is a figure which shows typically the vibration control apparatus of FIG. The action view in the state without the displacement by the vibration in the damping device of FIG. The action view in the state where displacement by vibration is small in the vibration control device of FIG. The action view in the state where displacement by vibration is large in the vibration control device of FIG. The figure which shows the relationship between the damping force of a state with a small displacement by the fluctuation | variation in the damping device of FIG. 5, and a displacement. The figure which shows the relationship between the damping force of a state with a large displacement by the fluctuation | variation in the damping device of FIG. 5, and a displacement. The figure which shows the relationship between the damping force of a state with a large displacement by the fluctuation | variation in the damping device of FIG. 5, and a displacement.

First Embodiment
As shown in FIG. 1, the vibration control device 10 according to the first embodiment of the present invention is provided, for example, in a structure 1 such as a building. The structure 1 is horizontally supported by the lower beam 2 extending in the horizontal direction, a pillar (not shown) extending upward from the lower beam 2, and the pillar supported above the lower beam 2 in the horizontal direction. And the upper beam portion 3 are included.

The vibration control device 10 includes a viscous damper 11 that damps relative horizontal vibration between the lower beam 2 and the upper beam 3 with a viscous force, and the lower beam 2 connected to the viscous damper 11 and the upper beam. The friction damper 30 damps the horizontal vibration of the beam 3 by friction, and the switching mechanism 40 switches the vibration damping by the viscosity damper 11 alone and the vibration damping by the combined use of the viscosity damper 11 and the friction damper 30 ing. Switching between the viscous damper alone and in combination is performed.

(Configuration of viscosity damper 11)
For convenience of explanation, the horizontal direction (horizontal direction) in which the lower beam 2 extends in the horizontal plane is taken as the X direction, and the vertical direction (front and back direction in the drawing) in the horizontal plane is taken as the Y direction. In the Z direction.

The viscous damper 11 has a bottomed rectangular cylindrical viscous fluid container 12 fixed so that the bottom surface abuts on the upper surface of the lower beam portion 2, a viscous fluid 13 stored in the viscous fluid container 12, and an upper beam A resistance plate 14 which is suspended in a state of being fixed to the portion 3 and is immersed in the viscous fluid 13 and horizontally moves relative to the viscous fluid container 12 is provided.

The viscous fluid container 12 is in the form of a box whose dimensions in the Y direction are set smaller than the dimensions in the X direction and the Z direction and whose upper side is open, and has a bottom 15 and an upright wall 16 rising from the bottom 15 A lower gusset 18 is provided at the lower end of the upstanding wall 16 so as to extend a bottom 15 in the Y direction and is fastened to the lower beam 2 via a fastening member 17. Further, the viscous fluid container 12 is provided with a bulge preventing bolt 19 which penetrates the front and rear upright wall portions 16 to prevent the viscous fluid container 12 from swelling in the Y direction. The bottom portion 15 and the lower gusset 18 may be integrally formed.

The viscous fluid 13 is, for example, a high viscosity polymer material such as silicone oil or hydrocarbon compound, has flame retardancy, weather resistance, durability, and has repeated viscosity due to displacement of the resistance plate 14 with respect to the viscous fluid container 12. It is made of a material which does not cause a decrease in viscosity even when the fluid 13 is sheared.

The resistance plate 14 is a plate formed in a substantially rectangular shape in a front view, and is fastened by the fastening member 21 over the entire area in the X direction of the upper end portion, and an upper gusset 22 extending in the X direction with an L-shaped cross section in the YZ plane And a through hole 23 formed longitudinally in the central portion and the lower portion. The through hole 23 is passed through a bulge preventing bolt 19. The upper gusset 22 is fastened to the upper beam 3 via a fastening member 24.
(Configuration of friction damper 30)

The friction damper 30 is held between the friction transmission plate 31 provided so as to be movable horizontally in the ± X direction with respect to the resistance plate 14 of the viscous damper 11, and the Y direction of the friction transmission plate 31 and the resistance plate 14 And a frictional force generator 32 provided on the

The friction transfer plate 31 is a plate member formed in a substantially rectangular shape long in the horizontal direction in a front view, and is disposed above the viscous fluid container 12 and disposed on both sides of the resistance plate 14.

The frictional force generating portion 32 is formed of a friction material (not shown) provided on the friction transmission plate 31 and having a predetermined coefficient of friction, and stainless steel (not shown) as a mating material provided on the resistance plate 14. The friction transmission plate 31 is formed with a through hole (not shown) for inserting the fastening member 34. A horizontally extending through hole 33 is formed in the upper portion of the resistance plate 14, and the friction transmitting plate is formed by the fastening member 34 inserted in the Y direction into the through hole of the friction transmission plate 31 and the through hole 33 of the resistance plate 14. 31 is fastened to the resistance plate 14. The fastening member 34 is composed of a PC steel rod, a bolt, etc. and a nut. Between the nut and the friction transfer plate 31, a bearing plate (not shown) having a washer function and having a rectangular shape in a front view is disposed.

Moreover, although the friction transmission plate 31 was arrange | positioned at the both sides of the resistance plate 14 of 1 sheet in the Example, it is not limited to this, It is good also as a structure which pinches the friction transmission plate 31 of 1 sheet by the resistance plate 14 of 2 sheets. A friction force generating portion 32 is provided between the friction transmission plate 31 and the resistance plate 14, and if the friction force is applied to the friction force generation portion 32 by the axial force of the fastening member 34, the friction transmission plate 31 and the resistance plate 14 are The number may differ.

In the embodiment, although the friction force generating portion 32 is provided as a separate member between the friction transmission plate 31 and the resistance plate 14, the present invention is not limited to this, and the friction transmission plate 31 and the resistance plate 14 are directly slid The sliding portions may be used as the frictional force generator 32 respectively. In the embodiment, although the resistance plate 14 is formed of a single plate, the invention is not limited thereto. If the resistance plate 14 is suspended while being fixed to the upper beam portion 3 and moves integrally, the resistance plate 14 is rubbed. The upper and lower portions of the generation portion 32 may be separated into two sheets and connected by a fastening member or the like, and the resistance plate 14 may be constituted of two sheets, three sheets or more as a whole.

(Configuration of switching mechanism 40)
The switching mechanism 40 is provided on the friction transmission plate 31 so as to face the plurality of first members 41 provided on the viscous fluid container 12 and in the ± X direction (horizontal direction) of the first member 41. And a plurality of second members 42 arranged to abut the first member 41 when the displacement of the viscous fluid container 12 in the ± X direction (horizontal direction) exceeds the first predetermined distance L1. The first predetermined distance L1 is the distance between the horizontal end of the first member 41 and the end of the second member 42 facing the end.

Specifically, the friction transfer plate 31 is disposed above the viscous fluid container 12. The plurality of first members 41 are first convex portions that project toward the friction transmission plate 31 from the upper portion of the viscous fluid container 12 (or in the + Z direction). The second member 42 is a second convex portion that protrudes from the lower portion of the friction transfer plate 31 toward the viscous fluid container 12 (or in the −Z direction).

The plurality of first convex portions 41 are disposed apart from each other in the X direction. The plurality of second convex portions 42 are spaced apart from each other in the X direction. One second convex portion 42 is arranged between the pair of adjacent first convex portions 41 at the same first predetermined interval L1 as the pair of first members 41 in the X direction. The plurality of first convex portions 41 and the second convex portions 42 are alternately arranged at a first predetermined interval L1 in the horizontal direction. The plurality of first convex portions 41 and the second convex portions 42 are all arranged at equal intervals at a first predetermined interval L1. Further, the upper end of the first convex portion 41 is at a position higher in the + Z direction than the lower end of the second convex portion 42.

Also, although the resistance plate 14 is movable in the horizontal direction with respect to the viscous fluid container 12, the second predetermined interval L2 is a range until the swelling prevention bolt 19 abuts on the through hole 23, and The second predetermined interval L2 is larger than the first predetermined interval L1. The second predetermined distance L2 is a distance from the left end portion of the screw portion of the expansion prevention bolt 19 in the X direction to the left edge of the through hole 23 in a state where the resistance plate 14 is not displaced with respect to the viscous fluid container 12 The distance from the right end of the threaded portion of the anti-inflation bolt 19 in the direction to the right edge of the through hole 23 is also a second predetermined interval L2.

Further, the switching mechanism 40 is provided with a buffer mechanism 43 at a portion where the first member 41 and the second member 42 abut against each other, for relieving the collision of the first member 41 and the second member 42. The buffer mechanism 43 is formed of, for example, an elastic member.

(Function of viscous damper 11)
In the viscous damper 11, a gap is formed between the viscous fluid container 12 and the resistance plate 14, and the viscous fluid 13 enters the gap. When the upper beam portion 3 vibrates in the horizontal direction with respect to the lower beam portion 2, the viscous damper 11 is a viscous shear resistance force of the viscous fluid 13 due to the horizontal relative vibration of the resistance plate 14 with respect to the viscous fluid container 12. Is used to damp the vibration of the resistance plate 14 relative to the viscous fluid container 12 with viscous force.

(Function of friction damper 30)
The friction damper 30 is a damping device that utilizes the frictional resistance of the frictional force generation unit 32, and transmits the axial force or the clamping force of the clamping member 34 to the friction material of the frictional force generation unit 32 by clamping the clamping member 34. Do. By moving the resistance plate 14 and the friction transmission plate 31 relative to each other in the horizontal direction, a dynamic friction force is generated on the friction surface to obtain a frictional resistance, thereby damping the vibration of the resistance plate 14 with respect to the friction transmission plate 31 by the friction force It is.

(Operation of switching mechanism 40)
The switching mechanism 40 damps the vibration due to the viscosity damper 11 alone according to the magnitude of the displacement of the viscous fluid container 12 with respect to the friction transmission plate 31 due to the vibration of the upper beam 3 with respect to the lower beam 2. 11 and switching of damping of vibration by the combined use of the friction damper 30. When the horizontal displacement of the viscous fluid container 12 with respect to the friction transmission plate 31 is within the first predetermined distance L1, the first member 41 does not abut against the second member or the second member together with the first member 41 Since it does not displace, only the viscous damper 11 works.

When the horizontal displacement of the viscous fluid container 12 with respect to the friction transmission plate 31 exceeds the first predetermined interval L1, the first member 41 abuts on the second member 42, and the second member 42 is displaced together with the first member 41. Do. For this reason, both the viscous damper 11 and the friction damper 30 are effective. As described above, in the switching mechanism 40, the displacement of the second member 42 with respect to the first member 41 causes the displacement of the second member 42 with respect to the first member 41 only when the displacement of the second member 42 with respect to the first member 41 is within the first predetermined distance L1. When L1 is exceeded, switching is performed so that both the viscous damper 11 and the friction damper 30 become effective.

(Configuration of Vibration Control Device 10 According to First Embodiment)
As shown in FIG. 2, the damping device 10 is disposed between the lower beam 2 and the upper beam 3. In the vibration control device 10, the viscous damper 11 and the friction damper 30 are connected in parallel, and the switching mechanism 40 is further connected.

When the relative displacement (vibration) of the upper beam portion 3 with respect to the lower beam portion 2 is small (within the range of the first predetermined interval L1 of the switching mechanism 40), the switching mechanism 40 generates a rattle (first predetermined interval L1). Since no change is made, vibration is damped only by the viscous damper 11.

When the relative displacement (vibration) of the upper beam 3 to the lower beam 2 is large (when the first predetermined distance L1 of the switching mechanism 40 is exceeded), the switching mechanism 40 switches, so the friction damper 30 also acts. The vibration is damped by both the viscous damper 11 and the friction damper 30.
(Operation of vibration control device 10 of the first embodiment)
For the convenience of explanation, it is assumed that the upper beam 3 is displaced with respect to the lower beam 2 when vibrating.
As shown in FIG. 3A, the upper beam 3 does not move relative to the lower beam 2 in a non-vibrated state.

As shown in FIG. 3B, in a state where the vibration is small (within the range of the first predetermined interval L1 in FIG. 3A), the upper beam 3 is displaced relative to the lower beam 2 as shown by arrow (1) The friction transfer plate 31 is displaced together with the resistance plate 14 as shown by the arrow (2), and the vibration is damped only by the viscous damper 11.

As shown in FIG. 3C, in a state where the vibration is large (a range exceeding the first predetermined interval L1 in FIG. 3A), the upper beam 3 is further added to the lower beam 2 as shown by the arrow (3). The second protrusion 42 abuts on the first protrusion 41 to switch the switching mechanism 40. The resistance plate 14 is further displaced as shown by the arrow (4), but the switching mechanism 40 prevents the friction transmission plate 31 from being displaced thereafter. Therefore, the frictional resistance plate 31 is displaced relative to the resistance plate 14 as indicated by the arrow (5). As a result, the friction damper 30 also acts to damp the vibration with both the viscosity damper 11 and the friction damper 30.

The third predetermined distance L3 from the right end of the resistance plate 14 in the X direction to the inner wall of the viscous fluid container 12 in the X direction is larger than the second predetermined distance L2 in FIG. 3A. The X-direction end of the resistance plate 14 does not abut the inner wall of the viscous fluid container 12.

(Relationship between damping force and displacement (historic shape))
As shown in FIG. 4A, when the displacement due to vibration is small, the displacement of the switching mechanism 40 is within the first predetermined interval L1 (within the backlash), so only the viscous force generated by the viscosity damper 11 is generated as a damping force. Do. Immediately after the occurrence of vibration, the damping force is increased as shown by an arrow (11), and then only the viscous force is applied, and the damping force and the displacement are changed as shown by an arrow (12).

As shown in FIG. 4B, when the displacement due to vibration is moderate, the displacement of the switching mechanism 40 exceeds the first predetermined interval L1 (becomes larger than the rattling), and the viscosity by the viscosity damper 11 is used as a damping force. Force and friction due to the friction damper 30 are generated. Immediately after the occurrence of a vibration, the damping force becomes large in a state where the displacement is in a medium state so as to form a two-step curve as shown by the arrow (13). The damping force due to the viscous force of the viscous damper 11 and the frictional force of the friction damper 30 is larger than the damping force due to only the viscous force of the viscous damper 11 shown in FIG. 4A.

Then, the damping force and the displacement change as shown by the arrow (14) in a state where both the viscous force and the frictional force are applied, the displacement direction of the vibration is reversed, and the displacement of the second convex portion 42 with respect to the first convex portion 41 When the direction is reversed, the displacement is reduced as shown by the arrow (15) in a state where only the viscous force is applied by the backlash of the switching mechanism 40, and the second convex portion 42 is again formed on the first convex portion 41. And the switching mechanism 40 exerts a viscous force and a frictional force as shown by an arrow (16) to increase the damping force. Then, the damping force and the displacement change as shown by the arrow (17) in a state where both the viscous force and the frictional force are applied.

As shown in FIG. 4C, since the displacement of the switching mechanism 40 exceeds the first predetermined interval L1 (becomes larger than the looseness) in a state where the displacement due to vibration is larger, the viscous force by the viscous damper 11 is used as a damping force. And the friction damper 30 generates a frictional force. The change in damping force is substantially the same as that in FIG. 4B, but the displacement is larger compared to the state in FIG. 4B.

The vibration of the lower beam 2 and the upper beam 3 in the horizontal direction can be damped by the viscous damper 11 and the friction damper 30 by the configuration of the vibration control device 10 according to the first embodiment described above. Specifically, on the viscous damper 11 side, when the resistance plate 14 suspended from the upper beam 3 moves horizontally with respect to the viscous fluid container 12 provided on the lower beam 2, the viscous fluid container By the viscous fluid 13 stored in 12, the horizontal vibration of the resistance plate 14 with respect to the viscous fluid container 12 is attenuated.

Further, on the friction damper 30 side, when the friction transmission plate 31 moves in the horizontal direction with respect to the resistance plate 14, the friction transmission plate is provided by the friction force generating portion 32 provided between the friction transmission plate 31 and the resistance plate 14. The horizontal vibration of the resistance plate 14 with respect to 31 is attenuated. Here, in the switching mechanism 40, when the horizontal displacement of the viscous fluid container 12 with respect to the friction transfer plate 31 exceeds the first predetermined distance L1, the first member 41 provided in the viscous fluid container 12 transmits friction. The friction transmission plate 31 moves in the horizontal direction relative to the resistance plate 14 with the viscous fluid container 12 in contact with the second member 42 provided on the plate 31.

For this reason, when the displacement of vibration is small and the relative horizontal displacement of the viscous fluid container 12 with respect to the friction transmission plate 31 is less than the first predetermined distance L1, the first member 41 abuts on the second member 42. Because the friction transmission plate 31 does not move relatively horizontally, the friction damper 30 does not work, and only the viscous damper 11 works effectively.

Then, when the displacement of vibration increases and the relative horizontal displacement of the viscous fluid container 12 with respect to the friction transfer plate 31 exceeds the first predetermined distance L1, the first member 41 abuts on the second member 42. Since the friction transmission plate 31 moves in the horizontal direction relative to the resistance plate 14 together with the viscous fluid container 12, the friction damper 30 also works, and as a result, both the friction damper 30 and the viscosity damper 11 work effectively. That is, when the displacement of vibration is small, only the viscous damper 11 is effective, and when the displacement of vibration is large, both the viscous damper 11 and the friction damper 30 are effective. Thus, the vibration damping function can be effectively used both when the displacement of the vibration is large and small.

Furthermore, in the switching mechanism 40, the first member 41 is a first convex portion 41 projecting toward the friction transmission plate 31 disposed above the upper part of the viscous fluid container 12, and the second member 42 is a friction transmission plate Since it is the 2nd convex part 42 which protrudes toward the viscous fluid container 12 from the lower part of 31 and the 1st convex part 41 and the 2nd convex part 42 are alternately arranged by predetermined spacing L1, a plurality, When the first convex portion 41 moves in the horizontal direction, the second convex portion 42 is in contact with the second convex portion 42 at a plurality of places, and switching from damping of seismic intensity only by the viscous damper 11 to damping of vibration including the friction damper 30 is reliably performed. be able to.

Further, the switching mechanism 40 can smoothly contact the first convex portion 41 and the second convex portion 42 by the buffer mechanism 43.

Second Embodiment
The description of the same configuration as that of the first embodiment will be omitted, and the reference numerals will be used. As shown in FIG. 5, the vibration control apparatus 50 according to the second embodiment of the present invention is provided, for example, in a structure 1 including a lower beam 2 and an upper beam 3 of a building or the like. .

The vibration control device 50 includes a viscous damper 51 that damps relative horizontal vibration between the lower beam 2 and the upper beam 3 with a viscous force, and the lower beam 2 connected to the viscous damper 51 and the upper beam. It comprises a friction damper 70 for damping the vibration in the horizontal direction of the beam 3 by friction, and a switching mechanism 80 for switching between damping of vibration by the viscous damper 51 alone and damping of vibration by the friction damper 70 alone.

(Configuration of viscosity damper 51)
The viscous damper 51 has a bottomed rectangular cylindrical viscous fluid container 52 fixed so that the bottom surface abuts on the upper surface of the lower beam portion 2, a viscous fluid 53 stored in the viscous fluid container 52, and an upper beam portion 3 and a friction transmission plate 71 suspended in a fixed state, and a resistance plate suspended by the friction transmission plate 71 via the friction damper 70 and immersed in the viscous fluid 53 and horizontally moving relative to the viscous fluid container 52 And 54.

The viscous fluid container 52 has a box-like shape in which the dimension in the Y direction is set smaller than the dimensions in the X direction and the Z direction and the upper side is opened, and a bottom 55 and an upright wall 56 rising from the bottom 55; A lower gusset 58 is provided at the lower end of the upright wall 56 so as to extend a bottom 55 and is fastened to the lower beam 2 via a fastening member 57. Further, the viscous fluid container 52 is provided with a bulge preventing bolt 59 which penetrates the front and rear upright wall portions 56 to prevent the viscous fluid container 52 from swelling in the Y direction. The bottom 55 and the lower gusset 58 may be integrally formed.

The viscous fluid 53 is, for example, a high viscosity polymer material such as silicone oil or hydrocarbon compound, and is made of a material that is flame retardant, weather resistant, durable, and does not cause a decrease in viscosity due to repeated shearing. It is done.

The friction transfer plate 71 is a plate material formed in a substantially rectangular shape long in the horizontal direction in a front view, is fastened by the fastening member 61 over the entire area in the X direction of the upper end portion, and is L-shaped in cross section in the YZ plane in the X direction It has an extending upper gusset 62 and a through hole 73 which is horizontally elongated in the center. A fastening member 74 inserted from a through hole (not shown) formed in the upper portion of the resistance plate 54 is passed through the through hole 73. The upper gusset 62 is fastened to the upper beam 3 via a fastening member 64.

The resistance plate 54 is a plate material formed in a rectangular shape in a front view, and is formed in the upper part through a through hole (not shown) through which the fastening member 74 passes, and the through hole 63 formed in a substantially rectangular shape in the center and lower part. And have. The upper portion of the resistance plate 54 is overlapped with the friction transmission plate 71 in the Y direction, and the fastening member 74 inserted in the Y direction into the through hole of the resistance plate 54 and the through hole 73 of the friction transmission plate 71 Is fastened to the friction transfer plate 71. The through hole 63 is passed through a bulge preventing bolt 59.

(Configuration of friction damper 70)
The friction damper 70 includes a friction transmission plate 71 fastened to the upper gusset 62 by a fastening member 61, a resistance plate 54 provided horizontally movably in the ± X direction with respect to the friction transmission plate 71, a resistance plate 54, and the friction. And a friction force generation unit 72 provided between the transmission plate 71 and the transmission plate 71. The friction transfer plate 71 is disposed above the viscous fluid container 52.

The frictional force generation unit 72 is provided on the friction transfer plate 71 and has a predetermined friction coefficient (not shown) for generating a frictional force larger than the viscous force of the viscous damper 51, and a mating member provided on the resistance plate 54. It consists of stainless steel (not shown) as a material. A through hole 73 for inserting the fastening member 74 is formed in the friction transmission plate 71. A through hole (not shown) is formed in the upper portion of the resistance plate 54, and the friction transmission plate 71 is formed by the fastening member 74 inserted in the Y direction into the through hole of the resistance plate 54 and the through hole 73 of the friction transmission plate 71. The resistance plate 54 is fastened to the In addition, the fastening member 74 is composed of a screw-formed steel rod (so-called PC steel rod) and a nut. A pressure bearing plate (not shown) having a washer function is disposed between the nut and the friction transmission plate 71 in a rectangular shape in a front view.

The fastening member 74 may be configured as a bolt and a nut. In the embodiment, one resistance plate 54 is disposed on one friction transmission plate 71. However, the present invention is not limited to this. Even if one friction transmission plate 71 is sandwiched by two resistance plates 54, Preferably, a friction force generating portion 72 is provided between the friction transmission plate 71 and the resistance plate 54, and if the friction force acts on the friction force generation portion 72 by the axial force of the fastening member 74, the friction transmission plate 71 and the resistance plate 54 are provided. There may be a difference in the number of Further, in the embodiment, the friction force generating portion 72 is provided as a separate member between the friction transmission plate 71 and the resistance plate 54 respectively, but is not limited to this. The friction transmission plate 71 and the resistance plate 54 are directly connected The sliding portions may be used as the frictional force generator 72 by sliding.

(Configuration of switching mechanism 80)
The switching mechanism 80 is provided in the viscous fluid container 52 passing through the substantially rectangular through hole 63 formed to penetrate the resistance plate 54 and the through hole 63, and the switching mechanism 80 of the viscous fluid container 52 with respect to the resistance plate 54. Passing the resistance plate 54 together with the viscous fluid container 52 in the ± X direction (horizontal direction) by contacting the edge of the through hole 63 when the displacement in the ± X direction (horizontal direction) exceeds the first predetermined interval L1 And a first predetermined distance L1 in the ± X direction (horizontal direction) from the edge of the through hole 63 to the passing member 81 is the movement of the resistance plate 54 with respect to the friction transfer plate 71 in the ± X direction (horizontal direction) It is set smaller than the possible second predetermined interval L2.

In the embodiment, a through hole (not shown) is formed in the passing member 81 and the swelling prevention bolt 59 is inserted into the through hole, but the invention is not limited thereto. The passing member 81 is integrated with the swelling prevention bolt 59. It is good also as bolt 59 itself for swelling prevention. In this case, the through hole 63 may be a long hole for escaping the bolt 59 for bulging.

Further, although the resistance plate 54 is movable in the horizontal direction with respect to the viscous fluid container 52, the first predetermined interval L1 is a range until the passing member 81 or the bolt 59 for swelling prevention abuts on the through hole 63. The second predetermined interval L2 is larger than the first predetermined interval L1. The second predetermined distance L2 is a distance from the left end of the threaded portion of the fastening member 74 in the X direction to the left edge of the through hole 73 in the state where there is no displacement of the resistance plate 54 with respect to the viscous fluid container 52 The distance from the right end of the screw portion of the fastening member 74 to the right edge of the through hole 73 is also a second predetermined interval L2.

Further, the switching mechanism 80 is provided with a buffer mechanism 83 for relieving the collision between the passing member 81 or the swelling prevention bolt 59 and the through hole 63 at a portion where the passing member 81 or the swelling prevention bolt 59 contacts the through hole 63. There is. The buffer mechanism 83 is made of, for example, an elastic member.

(Function of viscous damper 51)
In the viscous damper 51, a gap is formed between the viscous fluid container 52 and the resistance plate 54, and the viscous fluid 53 enters the gap. When the upper beam portion 3 vibrates in the horizontal direction with respect to the lower beam portion 2, the viscous damper 51 has a viscous shear resistance force of the viscous fluid 53 due to the horizontal relative vibration of the resistance plate 54 with respect to the viscous fluid container 52. Is used to damp the vibration of the resistance plate 54 relative to the viscous fluid container 52 with viscous force.

(Function of friction damper 70)
The friction damper 70 is a damping device utilizing the frictional resistance of the frictional force generator 72, and transmits the axial force or the clamping force of the clamping member 74 to the friction material of the frictional force generator 72 by clamping the clamping member 74. Do. By moving the resistance plate 54 and the friction transmission plate 71 relative to each other in the horizontal direction, a dynamic friction force is generated on the friction surface to obtain a frictional resistance, thereby damping the vibration of the resistance plate 54 against the friction transmission plate 71 by the friction force It is.

(Operation of switching mechanism 80)
The switching mechanism 80 damps the vibration due to the viscosity damper 51 alone according to the magnitude of the displacement of the viscous fluid container 52 relative to the resistance plate 54 due to the vibration of the upper beam 3 relative to the lower beam 2. And damping of the vibration caused by When the horizontal displacement of the viscous fluid container 52 with respect to the resistance plate 54 is within the first predetermined distance L1, the passing member 81 does not abut against the through hole 63 or the passing member 81 does not abut against the through hole 63 Only the viscous damper 51 works because it does not try to displace more than it does. When the horizontal displacement of the viscous fluid container 52 with respect to the resistance plate 54 exceeds the first predetermined interval L1, the passing member 81 abuts on the through hole 63 and becomes integral with the viscous fluid container 52 and the resistance plate 54. Displace.

Therefore, the resistance plate 54 is displaced with respect to the friction transmission plate 71, and only the friction damper 70 is effective. Thus, in the switching mechanism 80, only the viscosity damper 51 works when the horizontal displacement of the viscous fluid container 52 with respect to the resistance plate 54 is within the first predetermined distance L1, and the horizontal displacement of the viscous fluid container 52 with respect to the resistance plate 54 is When the first predetermined interval L1 is exceeded, only the friction damper 70 is switched to be effective.

(Configuration of Vibration Control Device 50 According to Second Embodiment)
As shown in FIG. 6, a vibration control device 50 is disposed between the lower beam 2 and the upper beam 3. In the vibration control device 50, the viscous damper 51 and the friction damper 70 are connected in series, and the switching mechanism 80 is further connected.

When the relative displacement (vibration) of the upper beam portion 3 with respect to the lower beam portion 2 is small (within the range of the first predetermined interval L1 of the switching mechanism 80), the switching mechanism 80 is rattling (first predetermined interval L1) Since the change is not made, the vibration is damped only by the viscous damper 51.

When the relative displacement (vibration) of the upper beam 3 with respect to the lower beam 2 is large (when the first predetermined distance L1 of the switching mechanism 80 is exceeded), the switching mechanism 80 is switched. Only the damper 70 acts to damp the vibration.

(Operation of vibration control device 50 of the second embodiment)
For the convenience of explanation, it is assumed that the upper beam 3 is displaced with respect to the lower beam 2 when vibrating. As shown in FIG. 7A, the upper beam 3 does not move relative to the lower beam 2 in a non-vibration state.

As shown in FIG. 7B, in a state where the vibration is small (within the range of the first predetermined interval L1 in FIG. 7A), the upper beam 3 is displaced as shown by the arrow (21) with respect to the lower beam 2. The resistance plate 54 is displaced together with the friction transfer plate 71 as shown by the arrow (22), and the vibration is damped only by the viscous damper 51.

As shown in FIG. 7C, in a state where the vibration is large (a range exceeding the first predetermined interval L1 in FIG. 7A), the upper beam 3 is further added to the lower beam 2 as shown by the arrow (23). The passage member 81 abuts on the through hole 63 to switch the switching mechanism 80. Although the resistance plate 54 is not displaced relative to the viscous fluid container 52, the switching mechanism 80 displaces the friction transmission plate 71 relative to the resistance plate 54 as shown by the arrow (24). As a result, the friction damper 70 acts to damp the vibration only with the friction damper 70.

In FIG. 7C, when the speed of displacement due to vibration is large, the viscous force exceeds the frictional force, so that the frictional force may occur even if the passing member 81 does not contact the through hole 63 in the switching mechanism 80.

(Relationship between damping force and displacement (historic shape))
As shown in FIG. 8A, since the displacement of the switching mechanism 80 is within the first predetermined interval L1 (within the backlash) in a state where the displacement due to vibration is small, only the viscous force generated by the viscosity damper 51 is generated as a damping force. Do. Immediately after the occurrence of vibration, the damping force increases with a small displacement as shown by the arrow (31), and then only the viscous force acts, and the damping force and the displacement change as shown by the arrow (32).

As shown in FIG. 8B, when the displacement due to vibration is moderate, if the displacement of the switching mechanism 80 exceeds the first predetermined interval L1 (becomes larger than the rattling), the friction by the friction damper 30 is used as a damping force. Force only occurs. In the range where the displacement of the switching mechanism 80 immediately after the occurrence of vibration is smaller than the first predetermined interval L1, only the viscous force acts as shown by the arrow (33) to increase the damping force, and then the passing member 81 At the same time, only the frictional force acts on the switching mechanism 80 as shown by the arrow (34) to increase the damping force.

Then, when only the frictional force acts, the damping force and the displacement change as shown by the arrow (35), and when the displacement direction of the vibration becomes opposite and the displacement direction of the passing member 81 with respect to the through hole 63 becomes the reverse direction The displacement changes so as to decrease as shown by the arrow (36) in a state where only the viscous force is applied by the amount of the rattling of 80, and the passing member 81 abuts the through hole 63 again and the switching mechanism 80 causes the arrow (37). As in the above, only the frictional force acts to increase the damping force. Next, the damping force and the displacement change as indicated by the arrow (38) in the state where only the frictional force is applied.

When the viscous force is larger than the frictional force, the frictional force starts to occur. Due to the velocity dependence of the viscous body, the viscous force exceeds the frictional force when the seismic velocity is high.

As shown in FIG. 8C, in the state where the displacement due to vibration is larger, the change in damping force is substantially similar to that in FIG. 8B, but the displacement becomes larger compared to the state in FIG. 8B.

In the first embodiment, the first member 41 is a first convex portion in a rectangular shape in front view, and the second member 42 is a second convex portion in a rectangular shape in front view, but the present invention is not limited thereto. The second member 42 also has a trapezoidal or semicircular shape in a front view, or the first member 41 has a pin that protrudes in the + Y direction, and the second member has a pin receiving portion, etc. If it switches so that the friction transmission board 31 may be displaced with respect to the resistance board 14 when 1 predetermined space | interval L1 is exceeded, it may be another structure.

In the first embodiment, the distance from the right end of the first member 41 to the left end of the second member 42 adjacent to the right, and the right end of the second member 42 adjacent to the left from the left end of the first member 41 The first predetermined distance L1 and both of them are equally displaced to the left and right, but the present invention is not limited to this, and the distance from the right end of the first member 41 to the left end of the second member 42 adjacent to the right The distance from the left end of the first member 41 to the right end of the second member 42 adjacent to the left may be set to be non-uniform.

1 .. Structure, 2 .. Lower beam, 3 .. Upper beam, 10, 50. Damping

device

11, 51 .. Viscosity damper, 12, 52. Viscous fluid container, 13, 53. Viscous fluid, 14, 54.

Resistance plate

30, 70.

Friction damper

31, 71.

Friction transmission plate

32, 32.

Friction force generator

40, 80. Switching mechanism 41. First member (first convex portion) 42.. Second member (second convex portion) 43, 83.

Buffer mechanism

19, 59 .. Expansion prevention bolt 63. Through hole 81. Passing member L1. First predetermined interval L2. Second predetermined interval L3 .. Third predetermined interval.

Claims

A vibration control device provided in a structure including a lower beam portion and an upper beam portion,
A viscous damper that damps horizontal vibration of the lower beam portion and the upper beam portion with viscosity, and a frictional force that is connected to the viscous damper and causes horizontal vibration of the lower beam portion and the upper beam portion A friction damper for damping, and a switching mechanism for switching between vibration damping by the viscosity damper alone and vibration damping by the combination of the viscosity damper and the friction damper;
The viscous damper is suspended in a viscous fluid container fixed on the lower beam, a viscous fluid stored in the viscous fluid container, and fixed to the upper beam and dipped in the viscous fluid. And a resistance plate moving horizontally with respect to the viscous fluid container,
The friction damper includes a friction transmission plate provided so as to be horizontally movable with respect to the resistance plate, and a friction force generator provided between the friction transmission plate and the resistance plate of the viscous damper,
The switching mechanism includes a first member provided to the viscous fluid container, and a second member provided to the friction transmission plate opposite to the horizontal movement direction of the first member, and the switching mechanism is directed to the friction transmission plate When the horizontal displacement of the viscous fluid container exceeds the first predetermined interval between the horizontal end of the first member and the end of the second member opposite to the end, the first member is pressed against the first member A vibration control device characterized by moving the friction transmission plate horizontally with the viscous fluid container relative to the resistance plate by contacting.
The vibration control device according to claim 1,
In the switching mechanism,
The friction transfer plate is disposed above the viscous fluid container,
The first member is a first convex portion protruding toward the friction transmission plate from an upper portion of the viscous fluid container,
The second member is a second convex portion that protrudes toward the viscous fluid container from the lower portion of the friction transfer plate,
A vibration control device characterized in that the plurality of first convex portions and the plurality of second convex portions are alternately arranged at predetermined intervals in the horizontal movement direction of the first convex portion.
The vibration control device according to claim 1,
The vibration control device according to claim 1, wherein the switching mechanism includes a buffer mechanism that reduces a collision between the first member and the second member at a portion where the first member and the second member abut.
A vibration control device provided in a structure including a lower beam portion and an upper beam portion,
A viscous damper that damps horizontal vibration of the lower beam portion and the upper beam portion with viscosity, and a frictional force that is connected to the viscous damper and causes horizontal vibration of the lower beam portion and the upper beam portion A friction damper for damping, and a switching mechanism for switching between vibration damping by the viscous damper alone and vibration damping by the friction damper alone;
The viscous damper includes a viscous fluid container fixed on the lower beam portion, a viscous fluid stored in the viscous fluid container, and a friction transfer plate suspended in a state fixed to the upper beam portion. And a resistance plate which is suspended from the friction transfer plate via the friction damper and immersed in the viscous fluid and horizontally moves relative to the viscous fluid container.
The friction damper includes the friction transmission plate, the resistance plate provided so as to be horizontally movable with respect to the friction transmission plate, and a friction force generating portion provided between the resistance plate and the friction transmission plate. Equipped
The switching mechanism is provided in the viscous fluid container through the through hole formed to penetrate the resistance plate and the through hole, and the horizontal displacement of the viscous fluid container with respect to the resistance plate is (1) A passing member for moving the resistance plate horizontally with the viscous fluid container relative to the friction transmission plate by abutting on the edge of the through hole when the predetermined distance is exceeded Vibration control device characterized by.
The vibration control device according to claim 4, wherein
In the switching mechanism,
The passage member is a bulge preventing bolt that prevents the viscous fluid container from swelling.
The vibration control device according to claim 1, wherein the through hole is a relief long hole of the expansion preventing bolt.
The vibration control device according to claim 4, wherein
The vibration control device according to claim 1, wherein the switching mechanism includes a buffer mechanism that reduces a collision between the passing member and the edge of the through hole at a portion where the passing member abuts the edge of the through hole.