JP2018017249A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device that does not require any replacement parts and that can also be applied to a structure having narrow column interval or beam interval [that is, a narrow structure plane].SOLUTION: A vibration control device 1 placed in an engine frame of a structure to reduce oscillation of the structure by an external force comprises a vibration isolation device 100 having one end fixed to a part of the engine frame and the other end fixed to another portion of the engine frame to generate attenuation force against the external force; viscous elastic bodies 218, 228 arranged in parallel with the vibration isolation device between one end and the other end of the vibration isolation device to generate a resisting force against the external force in response to a relative displacement between one end and the other end; and slider plates 214, 224 to generate a frictional force in respect to the external force by sliding the viscous elastic bodies in respect to the vibration isolation device when prescribed stress occurs in the viscous elastic bodies.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vibration control device used for vibration suppression of a structure such as a building.

  In recent years, from the viewpoint of improving the earthquake resistance of structures such as buildings, vibration control devices that reduce the shaking of structures have been provided. Some of these vibration control devices have both functions of earthquake resistance and vibration control. Patent Document 1 describes a vibration control device including an earthquake-resistant part that receives an earthquake load in an elastic region, and a vibration-control part that functions as a damper after the earthquake-resistant part yields and absorbs the energy of shaking of the structure. ing.

  The vibration control device described in Patent Document 1 includes an earthquake-resistant equipment provided with a trigger member that resists an earthquake load and breaks at a predetermined breaking strength, and a vibration damper that absorbs vibration energy of a structure body. It has. And when the load applied to the trigger member by the vibration of the structure body is equal to or less than the breaking strength of the trigger member, a resistance force that resists the shaking of the structure is generated (that is, the seismic function is exhibited), When the breaking strength of the trigger member is exceeded, the trigger member is broken to generate a damping force by the damping damper (that is, exhibiting a damping function).

JP 2011-042974 A

  If the technique of patent document 1 is used, the earthquake resistance of a structure can be remarkably improved by the earthquake-resistant function by earthquake-resistant equipment and the earthquake-damping function by the damping damper. However, in the configuration of Patent Document 1, since it is necessary to install the earthquake-resistant equipment and the damping damper in parallel or intersecting with each other in the construction surface, a structure having a narrow column spacing or beam spacing (that is, a narrow construction surface). It is difficult to apply to.

  In addition, once the trigger member breaks due to an earthquake, the seismic function is completely lost, so for further aftershocks, only the seismic damper function is used to ensure sufficient seismic resistance. I can't. Moreover, in order to restore the function of the broken trigger member, it is necessary to replace the trigger member with a new trigger member. Therefore, the trigger member needs to be configured to be detachable or easily accessible to the trigger member. In addition, there are restrictions not only on the design of the vibration control device but also on the design of the structure itself using the vibration control device.

  The present invention has been made in view of such circumstances, and an object of the present invention is not to require a replacement part such as the trigger member, and a structure having a narrow column interval or beam interval (that is, a narrow space). An object of the present invention is to provide a vibration control device that can also be applied to a structural surface.

  In order to solve the above-described problems and achieve the object, a vibration control device of the present invention is a vibration control device that is arranged in a structure frame and reduces shaking of the structure due to an external force, one end of which is the frame structure. The other end is connected to the other part of the frame and generates a damping force with respect to the external force, and is provided in parallel with the damping device, the one end and the other end A spring mechanism that generates a resistance force to the external force in accordance with the relative displacement of the spring, and a slide that slides the spring mechanism relative to the vibration control device when a predetermined stress is generated in the spring mechanism. And a mechanism.

  According to the present invention, a vibration control device that does not require a replacement part such as a conventional trigger member and can be applied to a structure having a narrow column interval or beam interval (that is, a narrow surface) is realized.

It is a figure which shows the example of installation of the vibration control apparatus which concerns on embodiment of this invention. It is an external view explaining the schematic structure of the vibration control apparatus which concerns on embodiment of this invention. It is a figure explaining operation | movement of the vibration control apparatus which concerns on embodiment of this invention. It is a graph which shows the result of the effect confirmation experiment of the vibration control apparatus which concerns on embodiment of this invention. It is a graph which shows the result of the effect confirmation experiment of the vibration control apparatus which concerns on embodiment of this invention. It is a graph which shows the result of the effect confirmation experiment of the vibration control apparatus which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. . In addition, the same code | symbol is attached | subjected to the same or an equivalent part in a figure, and the description is not repeated.

(Configuration of vibration control device)
FIG. 1 is a diagram illustrating an installation example of a vibration control device 1 according to an embodiment of the present invention. 2 is an external view for explaining a schematic configuration of the vibration control device 1, FIG. 2 (a) is a plan view, FIG. 2 (b) is a front view, and FIG. 2 (c) is a left side. FIG. As shown in FIG. 1, the vibration control device 1 of the present embodiment is surrounded by two adjacent pillars P1 and P2 of the structure S, and a lower floor beam L1 and an upper floor beam L2 that are adjacent in the vertical direction. It is an apparatus for reducing the shaking of the structure S generated by an external force such as an earthquake, which is arranged in a built frame (that is, the construction plane VP).
The vibration control device 1 is straddled between the gusset plate GP provided at the intersection of the column P1 and the lower floor beam L1 and the gusset plate GP provided at the intersection of the column P2 and the upper floor beam L2. Be placed. Hereinafter, in the present specification, as shown in FIG. 2, the longitudinal direction of the vibration control device 1 is the X-axis direction, and the direction in which the pair of slider plates 214 and 224 are provided (that is, the upper and lower sides of FIG. 2A). (Direction) is defined as the Y-axis direction, and the direction orthogonal to the X-axis and the Y-axis is defined as the Z-axis direction. 2 (a) and 2 (b) indicate the axis of the vibration control device 1.

  As shown in FIG. 2, the vibration control device 1 is slidably attached to the vibration control device 100 including the oil damper 110, the load column 120, and the rod end 130, and the load column 120. A pair of slider plates 214 and 224, a pair of frame plates 216 and 226 fixed to the rod end 130, and the slider plates 214 and 224 and the frame plates 216 and 226 are respectively sandwiched to elastically hold both. Viscoelastic bodies 218, 228 and the like to be connected are included.

  The oil damper 110 is a cylindrical member filled with oil 116 inside (FIG. 3), and reduces vibration by converting energy generated by an external force such as an earthquake into heat energy of the oil 116 (for details). Later).

  The load column 120 is a cylindrical member disposed so as to have a common axis with the oil damper 110. A pair of joints 122 and 124 projecting in the X-axis direction are formed on one end surface of the load column 120. When the vibration control device 1 is attached to the structure S, the pair of joints 122 and 124 attach the gusset plate GP. It arrange | positions so that it may straddle (pinch), and it attaches rotatably by fastening members, such as a pin not shown (FIG. 1).

  A pair of support members 210 and 220 to which slider plates 214 and 224 are respectively attached are formed on the outer peripheral surface of the load column 120. As shown in FIG. 2A, the pair of support members 210 and 220 are angle members having a substantially L-shaped cross section that protrude from the outer peripheral surface of the load column 120 in the Y-axis direction and the direction opposite to the Y-axis direction. The flat surfaces 210a, 220a to which the slider plates 214, 224 are attached face outward (that is, the flat surfaces 210a, 220a are arranged so as to face the Y-axis direction), and are welded to the outer peripheral surface of the load column 120. It is fixed by. Further, through holes (not shown) through which the bolts 212 and 222 are inserted are formed in the flat portions 210a and 220a, and the bolts 212 and 222 are elongated holes 214a and 224a (in FIG. 2) of the slider plates 214 and 224. The slider plates 214 and 224 are attached to the flat portions 210a and 220a by being inserted into the through holes and not fastened to the nuts 213 and 223, respectively.

  The rod end 130 is a rectangular plate-like member joined to the other end of the piston rod 112 extending from the oil damper 110. A pair of joints 132 and 134 projecting in the X-axis direction are formed on one end surface of the rod end 130. When the vibration control device 1 is attached to the structure S, the pair of joints 132 and 134 attach the gusset plate GP. It arrange | positions so that it may straddle (pinch), and it attaches rotatably by fastening members, such as a pin not shown (FIG. 1).

  The pair of slider plates 214 and 224 are plate-like members extending in parallel in the X-axis direction with the damping device 100 sandwiched in the Y-axis direction. Long holes 214a and 224a extending in the X-axis direction are formed at the ends of the pair of slider plates 214 and 224 on the upstream side in the X-axis direction (base ends located on the left side in the drawing) (see FIG. 2B). )), A plurality of bolts 212, 222 are inserted into the long holes 214a, 224a and fastened to the nuts 213, 223, whereby the slider plates 214, 224 are attached to the flat portions 210a, 220a of the support members 210, 220, respectively. It is done. That is, the pair of slider plates 214 and 224 are cantilevered by the pair of support members 210 and 220, respectively. In the present embodiment, the plurality of bolts 212 and 222 and the nuts 213 and 223 are fastened with a predetermined tightening torque, and the slider plates 214 and 224 are fixed to be slidable with respect to the flat portions 210a and 220a. Has been. When a stress exceeding the slip resistance acts between the slider plates 214 and 224 and the flat portions 210a and 220a in the X-axis direction, the slider plates 214 and 224 slide relative to the flat portions 210a and 220a. A predetermined frictional force is generated (details will be described later).

  The pair of frame plates 216 and 226 are plate-like members that are arranged close to the slider plates 214 and 224 so that at least a part of each of the pair of slider plates 214 and 224 faces each other. The pair of frame plates 216 and 226 are cantilevered with their ends (base ends) on the downstream side in the X-axis direction fixed to the rod end 130.

The viscoelastic body 218 is a member that is sandwiched between the slider plate 214 and the frame plate 216 by bonding and elastically connects the two. Similarly, the viscoelastic body 228 is a member that is sandwiched by being fixed to the slider plate 224 and the frame plate 226 by a technique such as adhesion, and elastically connects the two. In the present embodiment, the end portions on the downstream side in the X-axis direction of the slider plates 214 and 224 and the end portions on the upstream side in the X-axis direction of the respective frame plates 216 and 226 are opposed to each other. A viscoelastic body 218 is disposed in the portion.
The viscoelastic body 218 of the present embodiment is a gel substance such as αGEL (registered trademark). In the present embodiment, when an external force such as an earthquake is applied to the vibration control device 1, the viscoelastic bodies 218 and 228 are shear-deformed in the X-axis direction so that a resistance force is generated against the external force. (Details will be described later).

(Operation of vibration control device)
Next, the specific operation of the vibration control device 1 of the present embodiment will be described in further detail. FIG. 3 is a diagram for explaining the operation of the vibration control device 1. 3A shows a state in which no external force is applied to the vibration control device 1, FIG. 3B shows a state in which an external force having a minute amplitude is applied to the vibration control device 1, and FIG. c) shows a state in which an external force having a large amplitude is applied to the vibration control device 1. 3A to 3C are partial schematic cross-sectional views in the XY plane of the oil damper 110 for convenience of explanation.

  As shown in FIGS. 3A to 3C, the oil damper 110 according to this embodiment includes a cylinder 111 filled with oil 116, and is inserted into the cylinder 111 so as to advance and retreat in the axial direction (X-axis direction). And a piston 114 that is fixed to the periphery of one end of the piston rod 112 (end on the load column 120 side) and partitions the inside of the cylinder 111 into two liquid chambers 111a and 111b. . The other end of the piston rod 112 is joined to the rod end 130.

  As shown in FIG. 3A, when no external force is applied to the vibration control device 1, the rod end 130 and the load column 120 of the vibration control device 1 are positioned at the initial positions, respectively, and the piston 114 is also connected to the cylinder 111. It is located at the approximate center in the axial direction.

When the structure S vibrates due to an earthquake or the like and an external force with a minute amplitude is applied to the vibration control device 1, the relative positional relationship between the rod end 130 and the load column 120 changes. For this reason, the piston 114 is also displaced in the cylinder 111 in the axial direction (X-axis direction).
FIG. 3B shows a state in which an external force having a minute amplitude is applied to the rod end 130 in the direction indicated by the white arrow A1 (that is, the negative direction of the X axis). As shown in FIG. 3B, when an external force having a small amplitude is applied to the rod end 130, the piston rod 112 fixed to the rod end 130 is pressed in the axial direction, and the rod end 130 and the load column 120 are Since the relative position is displaced, the piston 114 is also displaced in the axial direction in the cylinder 111, and at the same time, the pair of frame plates 216, 226 fixed to the rod end 130 is also about to be displaced in the axial direction. For this reason, axial shear stress (force to extend in the axial direction) is generated in the viscoelastic bodies 218 and 228 held between the slider plates 214 and 224 and the frame plates 216 and 226. A resistance force (a force to shrink in the axial direction) is generated in the direction indicated by the black arrow A2 (that is, the positive direction of the X axis) by the viscous resistance (that is, the reaction) of the viscoelastic bodies 218 and 228.
That is, the viscoelastic bodies 218 and 228 of the present embodiment function as a kind of spring mechanism provided in parallel with the oil damper 110 and follow the displacement of the piston rod 112 to shear as shown in FIG. Due to the deformation, the viscous resistance accompanying this acts on the piston rod 112 as a resistance force opposite to the moving direction. Therefore, the external force applied to the rod end 130 is absorbed mainly by the viscous resistance of the viscoelastic bodies 218 and 228 within a predetermined amplitude range (that is, within the range in which the viscoelastic bodies 218 and 228 are subjected to shear deformation). Become.
However, in such a configuration, when the amplitude of the external force applied to the rod end 130 increases, the viscoelastic bodies 218 and 228 may be destroyed by shear. For this reason, in this embodiment, when the shear stress of the viscoelastic bodies 218 and 228 becomes equal to or greater than a predetermined value, the pair of slider plates 214 and 224 are slid in the axial direction, thereby causing the viscoelastic bodies 218 and 228 to slide. Is configured so as not to break or shear beyond a predetermined amount.

  FIG. 3C shows a state in which a large-amplitude external force is applied to the rod end 130 in the direction indicated by the white arrow A3 (that is, the negative direction of the X axis) (that is, to the viscoelastic bodies 218 and 228). A state in which the acting shear stress is a predetermined value or more). In the present embodiment, when the shear stress acting on the viscoelastic bodies 218 and 228 becomes a predetermined value or more, the pair of slider plates 214 and 224 slides in the axial direction so that the pair of slider plates 214 and 224 slide in the axial direction. 224 is fixed to the flat portions 210a and 220a of the pair of support members 210 and 220 with a predetermined fastening force. In other words, the pair of slider plates 214 and 224 and the flat portions 210a and 220a constitute a kind of sliding mechanism. Accordingly, when a large amplitude external force is applied to the rod end 130, as shown in FIG. 3C, the pair of slider plates 214, 224 are axially moved in a state where the viscoelastic bodies 218, 228 are sheared. Slide. When the pair of slider plates 214 and 224 slide, a resistance force (that is, a frictional force) in the direction opposite to the moving direction (that is, the direction of the black arrow A4) is generated by friction with the flat portions 210a and 220a.

  Further, when a large amplitude external force is applied to the rod end 130, the pair of slider plates 214 and 224 slide, so that the piston rod 112 fixed to the rod end 130 is greatly displaced in the axial direction. The piston 114 in the cylinder 111 is also greatly displaced in the axial direction. When the piston 114 is largely displaced in the cylinder 111, a flow is generated in the oil 116 by the pumping action, and the oil 116 passes through the orifice 114a formed in the piston 114, thereby generating a pressure difference before and after the orifice 114a. Since this pressure difference is applied to the cylinder 111 and the piston rod 112, a damping force in the direction opposite to the moving direction (that is, the black arrow direction) is generated in the rod end 130. As described above, in this embodiment, when a large amplitude external force is applied to the rod end 130, the pair of slider plates 214 and 224 are slid with respect to the flat portions 210a and 220a to be opposite to the moving direction. A resistance force in the direction is generated, and a damping force in the direction opposite to the moving direction is generated by the oil damper 110. Accordingly, the external force applied to the rod end 130 is absorbed by the resistance force of the pair of slider plates 214 and 224 and the damping force of the oil damper 110.

  3B and 3C, the operation when an external force is applied to the rod end 130 in the negative direction of the X axis (that is, the operation of the oil damper 110 in the compression direction). As described above, when an external force is applied to the rod end 130 in the positive direction of the X axis, the operation of the oil damper 110 is simply reversed (that is, operates in the extending direction). Detailed description will be omitted.

  As described above, the vibration control device 1 of the present embodiment exerts an earthquake resistance function mainly using the viscous resistance of the viscoelastic bodies 218 and 228 with respect to an external force with a small amplitude, and with respect to an external force with a large amplitude. Is configured to exhibit a vibration control function using the frictional force of the pair of slider plates 214 and 224 and the damping force of the oil damper 110. For this reason, according to the vibration control apparatus 1 of the present embodiment, it is possible to accurately control the shaking of the structure regardless of the magnitude of vibration energy. Further, in the present embodiment, since the viscoelastic bodies 218 and 228 are configured not to be sheared by allowing the pair of slider plates 214 and 224 to slide, it is unlike a conventional trigger member. In addition, no replacement parts are required, and sufficient seismic and vibration control functions can be demonstrated against further aftershocks. Further, in the vibration control device 1 of the present embodiment, a spring mechanism (that is, viscoelastic bodies 218 and 228) having an earthquake resistance function, a sliding mechanism (that is, slider plates 214 and 224) having a vibration control function, and an oil damper. 110 is integrally configured, one vibration control device 1 may be arranged for one composition plane VP, and the structure S having a narrow column spacing or beam spacing (that is, a narrow composition plane VP). ) Is also applicable.

(Effect confirmation experiment)
4 to 6 are results of an experiment for confirming the effect of the vibration control device 1 performed by the inventors of the present invention. FIG. 4 is a graph showing the results of a sinusoidal excitation experiment with a stroke of ± 10 mm using a vibration test apparatus. FIG. 5 is a graph showing the results of a sinusoidal excitation experiment with a stroke of ± 20 mm using a vibration test apparatus. FIG. 6 is a graph showing the results of a random wave response experiment with a stroke of ± 20 mm using a vibration test apparatus. 4 to 6, the horizontal axis represents the displacement amount (mm) applied by the vibration test apparatus, and indicates the displacement of the rod end 130 of the vibration control apparatus 1. The vertical axis indicates the damping force (kN) of the vibration control device 1 measured by the measuring instrument. 4-6, the graph shown as a continuous line has shown the characteristic of the vibration control apparatus 1 of this embodiment, and the graph shown with a broken line is for the conventional building which does not have the viscoelastic bodies 218,228. This shows the characteristics of a single oil damper.

(Configuration of vibration control apparatus 1 used as a test body)
In the effect confirmation experiment shown in FIG. 4 to FIG. 6, an architectural bilinear oil damper (manufactured by Sanwa Tech Co., Ltd.) having the specifications shown in Table 1 below is used as the oil damper 110, and the viscosity of the specifications shown in Table 2 is used. The vibration control apparatus 1 was configured using elastic bodies as viscoelastic bodies 218 and 228. When the shear deformation amount of the viscoelastic bodies 218 and 228 is up to 10 mm, the slider plates 214 and 224 are not displaced. When the shear deformation amount of the viscoelastic bodies 218 and 228 exceeds 10 mm, the slider plates 214 and 224 are displaced. Is configured to generate a frictional force due to displacement. The main parameters of the test body of the vibration control device 1 are as follows.
(1) Rigidity up to displacement 10mm: 12.5kN / mm
(2) Rigidity with displacement of 10 mm or more: 6.4 kN / mm
(3) Slip resistance: 64kN

(Consideration of experimental results)
As shown in FIG. 4, when the rod end 130 of the vibration control device 1 is vibrated with a sine wave having a stroke of ± 10 mm, the viscoelastic bodies 218 and 228 are shear-deformed while the slider plates 214 and 224 are not displaced. The damping force is considered to be dominated by the characteristics of the viscoelastic bodies 218 and 228, but the characteristic of the vibration control device 1 of the present embodiment is the conventional construction oil damper that does not have the viscoelastic bodies 218 and 228. It shows higher rigidity and damping than the characteristics of a single unit.

  As shown in FIG. 5, when the rod end 130 of the vibration control device 1 is vibrated with a sine wave having a stroke of ± 20 mm, the slider plates 214 and 224 are displaced, so that the damping force is applied to the slider plates 214 and 224. Although it is considered that the characteristic due to the frictional force and the damping force of the oil damper 110 is dominant, the characteristic of the vibration control device 1 of the present embodiment is that of a conventional building oil damper without the slider plates 214 and 224. It shows higher rigidity and damping than the characteristics.

  Further, as shown in FIG. 6, when the rod end 130 of the vibration control device 1 is vibrated with a random wave with a stroke of ± 20 mm, the slider plates 214 and 224 are randomly displaced and undisplaced. It can be seen that the same followability as a conventional building oil damper having no viscoelastic bodies 218 and 228 and slider plates 214 and 224 is exhibited. Moreover, it turns out that the damping force of the vibration control apparatus 1 far exceeds the damping force of the conventional building oil damper.

  From the above, the vibration control device 1 of the present embodiment has an extremely high damping force as compared with the conventional building oil damper, and by applying this to the structure S, the structure S Has sufficient seismic and vibration control functions.

  The above is the description of the embodiment of the present invention. However, the present invention is not limited to the configuration of the above-described embodiment, and various modifications are possible within the scope of the technical idea. For example, although the viscoelastic bodies 218 and 228 of the present embodiment have been described as being α-gel (registered trademark), any gel-like substance having a predetermined elastic force can be applied.

  Further, the vibration control device 1 of the present embodiment is within a frame surrounded by two adjacent pillars P1 and P2 of the structure S, and the lower and upper floor beams L1 and L2 that are adjacent in the vertical direction ( That is, although it has been described that it is arranged in a bracing manner on the surface VP), it is not necessarily limited to such a configuration, and one end of the vibration control device 1 (that is, the pair of joints 122 of the load column 120, 124) is pivotally connected (or fixed) to a part of the frame, and the other end (that is, the pair of joints 132 and 134 of the rod end 130) is rotatably connected (or fixed) to the other part of the frame. ).

  Moreover, although the vibration control apparatus 1 of this embodiment was demonstrated as what has the oil damper 110 with which the oil 116 was filled, it is not necessarily limited to such a structure, It replaces with the oil 116 and other types It is also possible to apply a fluid damper filled with a working fluid.

(Summary of exemplary embodiments of the present invention, operation and effect)
The vibration control device (vibration control device 1) according to the first aspect is a vibration control device that is interposed in a frame (structure plane VP) of a structure (structure S) and reduces the vibration of the structure due to external force. One end (load column 120) is fixed to a part of the frame (lower floor beam L1), and the other end (rod end 130) is fixed to the other part of the frame (upper floor beam L2). Between the one end and the other end of the damping device that generates a damping force in parallel with the damping device, depending on the relative displacement of the one end and the other end When a predetermined stress is generated in the spring mechanism (viscoelastic bodies 218, 228) that generates a resistance force against the external force, the spring mechanism is slid with respect to the vibration control device to generate the external force. And a sliding mechanism (slider plates 214 and 224) that generates a frictional force.
According to such a configuration, the seismic function is exhibited by the viscous resistance of the spring mechanism for an external force with a small amplitude, and the frictional force of the sliding mechanism and the damping of the vibration control device for an external force with a large amplitude. The vibration control function is demonstrated by the force. For this reason, according to the vibration control apparatus of this aspect, it is possible to accurately control the shaking of the structure regardless of the magnitude of vibration energy.
Moreover, in this aspect, the spring mechanism which has a seismic-proof function, the sliding mechanism and seismic-control apparatus which have a seismic control function are comprised integrally. Conventionally, when both a reinforcing material that increases the rigidity and improves the earthquake resistance function and a vibration control device that reduces the vibration of the structure are installed on the structure, these are separate members. Must be arranged on different construction surfaces, resulting in an increase in construction sites and construction costs, a decrease in convenience due to a decrease in openings due to the installation of each member, and the like. According to this aspect, it is only necessary to arrange one vibration control device for one composition surface, and the present invention can be applied to a structure having a narrow column interval or beam interval (that is, a narrow composition surface).
Moreover, according to this aspect, when a predetermined stress is generated in the spring mechanism, the spring mechanism slides with respect to the vibration control device, so that the spring mechanism is not sheared. Therefore, no replacement parts are required unlike the conventional trigger member, and sufficient seismic resistance and seismic control functions are exhibited even for further aftershocks.

The vibration control device according to the second aspect is characterized in that the spring mechanism includes viscoelastic bodies (viscoelastic bodies 218 and 228) that are deformed according to relative displacement between one end and the other end.
According to such a configuration, the spring mechanism can be realized with a simple configuration using the viscous resistance of the viscoelastic body.

The vibration control apparatus according to the third aspect is characterized in that the viscoelastic body is a gel substance.
According to such a configuration, it is possible to easily obtain a predetermined resistance force using the viscous resistance of the viscoelastic body.

  In the vibration control device according to the fourth aspect, the spring mechanism is arranged in parallel to each other so as to sandwich the vibration control device, and a pair of first plates (sliders) whose base ends are attached to one end side of the vibration control device. Plates 214, 224) and a pair of second plates (frame plates) disposed adjacent to each first plate so as to face each first plate and having a base end fixed to the other end of the vibration control device 216, 226), and the viscoelastic body is bonded and sandwiched between each first plate and a second plate adjacent to each first plate, and is subjected to relative displacement between one end and the other end. It is characterized by shear deformation.

  The vibration control device according to the fifth aspect is characterized in that the sliding mechanism has a pair of support members that are disposed on one end side of the vibration control device and support the pair of first plates in a slidable manner.

  The vibration control device according to the sixth aspect is characterized in that the vibration control device generates a damping force when the spring mechanism slides with respect to the vibration control device.

  In the vibration control device according to the seventh aspect, the vibration control device includes a cylinder, a piston rod inserted into the cylinder, one end fixed to the other end of the vibration control device, and two liquid chambers in the cylinder. The piston includes a piston that moves in the cylinder as the piston rod moves and a working liquid that fills the two liquid chambers, and the piston has an orifice through which the working liquid passes when the piston moves. It is characterized by.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of this aspect is shown not by the above description but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

  DESCRIPTION OF SYMBOLS 1 ... Vibration control apparatus, 100 ... Damping device, 110 ... Oil damper, 111 ... Cylinder, 111a, 111b ... Liquid chamber, 112 ... Piston rod, 114 ... Piston, 114a ... Orifice, 116 ... Oil, 120 ... Load column, 122, 124, 132, 134 ... joint, 130 ... rod end, 210, 220 ... support member, 210a, 220a ... flat portion, 212, 222 ... bolt, 213, 223 ... nut, 214, 224 ... slider plate, 214a, 224a ... long hole, 216, 226 ... frame plate, 218, 228 ... viscoelastic body

Claims (7)

A vibration control device that is arranged in a frame of a structure and reduces shaking of the structure due to an external force,
One end is connected to a part of the frame, the other end is connected to the other part of the frame, and a damping device that generates a damping force with respect to the external force;
A spring mechanism that is provided in parallel with the vibration control device and generates a resistance force to the external force according to a relative displacement between the one end and the other end;
A vibration control device comprising: a sliding mechanism that slides the spring mechanism relative to the vibration control device when a predetermined stress is generated in the spring mechanism.   The vibration control apparatus according to claim 1, wherein the spring mechanism includes a viscoelastic body that deforms according to a relative displacement between the one end and the other end.   The vibration control apparatus according to claim 2, wherein the viscoelastic body is a gel substance. The spring mechanism is
A pair of first plates that are arranged in parallel with each other with the vibration control device sandwiched, and a base end portion is attached to the one end side of the vibration control device;
A pair of second plates, each of which is arranged to face each of the first plates and whose base end is fixed to the other end of the vibration control device;
The viscoelastic body is fixed to each first plate and a portion of a second plate facing each first plate, and is shear-deformed according to relative displacement between the one end and the other end. The vibration control device according to claim 2 or 3.   5. The vibration control device according to claim 4, wherein the sliding mechanism includes a pair of support members that are disposed on the one end side of the vibration control device and slidably support the pair of first plates. .   The vibration control device according to any one of claims 1 to 5, wherein the vibration control device generates the damping force when the spring mechanism slides with respect to the vibration control device. .   The vibration control device includes a cylinder, a piston rod inserted into the cylinder, one end of which is fixed to the other end of the vibration control device, and the cylinder is divided into two liquid chambers. A piston that moves in the cylinder as it moves and a working liquid that fills the two liquid chambers, the piston having an orifice through which the working liquid passes when the piston moves. The vibration control device according to any one of claims 1 to 6.

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