JP4879766B2 - Vibration control mechanism - Google Patents

Description

  The present invention relates to a vibration control mechanism.

For example, a viscoelastic body layer having a predetermined thickness is interposed between a first material made of a plate or the like and a second material, and the viscosity between the first material and the second material is relatively moved. 2. Description of the Related Art Conventionally, a vibration control mechanism in which an elastic layer is subjected to shear deformation to absorb vibration energy caused by an earthquake has been known.
JP 2005-220614 A

  However, in the vibration control mechanism as described above, when the thickness of the viscoelastic layer is increased, the deformation performance is improved, and a large amount of vibration energy can be absorbed in response to large vibrations. For shaking, it becomes impossible to absorb the energy of shaking efficiently, and conversely, if the thickness of the viscoelastic layer is reduced, the deformation performance will be reduced, and energy will be absorbed efficiently for small shaking. However, it will not be able to withstand large vibrations, so it is not possible to efficiently absorb the energy of vibrations for both large and small vibrations with a single vibration control mechanism. There is a problem that a vibration control mechanism corresponding to the magnitude of the vibration must be prepared.

  In view of the above-described problems, the present invention provides a vibration control mechanism that can efficiently absorb vibration energy even with a large vibration or a small vibration with a single vibration control mechanism. Let it be an issue.

The above-mentioned problem is that an intermediate material is disposed between the first material and the second material, and is predetermined between the first material and the intermediate material and between the second material and the intermediate material. The first and second viscoelastic layers having a thickness of 1 mm and 2 are bonded to each other, and the first viscoelastic layer between the first material and the intermediate material is subjected to shear deformation due to relative movement of the first material and the intermediate material. Energy is absorbed, and the second viscoelastic body layer between the second material and the intermediate material is subjected to shear deformation to absorb the energy of shaking, and
An integrated mechanism for releasably integrating the intermediate material with either the first material or the second material is provided,
An integrated state in which the intermediate material is integrated with the one by the integration mechanism and the viscoelastic body layer interposed therebetween is not shear-deformed, and the integrated state is canceled to cancel the viscosity between them. This is solved by a vibration control mechanism that includes a switching mechanism that switches between an integrated release state that allows shear deformation of the elastic layer.

  In this seismic control mechanism, only one viscoelastic body layer undergoes shear deformation in response to shaking in the integrated state, and both viscoelastic body layers undergo shear deformation in response to shaking in the integrated release state. Therefore, in the integrated state, a small amount of vibration energy can be efficiently absorbed by the one viscoelastic body layer that undergoes shear deformation. Can be efficiently absorbed by both viscoelastic layers, and by switching the above states, the vibration energy can be absorbed efficiently for both large and small vibrations with a single vibration control mechanism. be able to.

  In the above-described vibration control mechanism, the switching mechanism may be composed of a mechanism that maintains an integrated state when the vibration is less than a predetermined magnitude and releases the integrated state when the vibration exceeds the magnitude.

  In this case, for example, the energy of small shakes caused by small and medium earthquakes that can occur on a daily basis is efficiently absorbed in an integrated state. Such a large shaking energy can be efficiently absorbed, and a wide range of shaking energy from a small to large earthquake can be efficiently absorbed.

  Since the present invention is as described above, it is possible to efficiently absorb the energy of shaking with respect to a large shake and a small shake with a single vibration control mechanism.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  The seismic control mechanism of the embodiment shown in FIGS. 1 and 2 is applied to a seismic control panel 1 for a wall, 2 is a panel frame, and 3 is a seismic control device.

  As shown in FIG. 2, the panel frame 2 is made of a steel frame assembled in a square ring shape with an upper frame 2a, a lower frame 2b, and left and right side frames 2c, 2c. An upper rigid body 4 made of a frame is provided in a fixed hanging state, and a lower rigid body 5 made of an inverted V-shaped frame is provided in a fixed rising state on the lower frame 2b. It is connected to the vibration control device 3 in the middle part in the vertical direction.

  As shown in FIGS. 1 (a) and 1 (b), the vibration control device 3 is an intermediate material between a steel plate 6 as a first material and a steel plate 7 as a second material. A steel plate 8 is disposed, and first and second stickers having a predetermined thickness are respectively disposed between the first plate 6 and the intermediate plate 8 and between the second plate 7 and the intermediate plate 8. The elastic layers 9 and 10 are interposed in an adhesive state. In the present embodiment, a double structure is provided in which a second plate 7, an intermediate plate 8, and first and second viscoelastic layers 9 and 10 are provided on both sides of the first plate 6.

  The damping device 3 has a first plate 6 projecting outward at one end thereof, and a lower end portion of the upper rigid body 4 connected by bolts, nuts 11... With the projecting plate portion 6a as a joint portion. On the other end side, the pair of second plates 7 and 7 protrude outward, the protrusion is integrated with the base plate 12 by welding or the like, and the joint plate 13 protrudes outward on the base plate 12. And the upper end of the lower rigid body 5 is connected to the joint plate 13 with bolts and nuts 11 and incorporated into the panel frame 2 so that the intermediate plates 8 and 8 and the base plate 12 are integrated. The switching mechanisms 14 and 14 are connected.

  Each integrated / switching mechanism 14 has both an integrated mechanism and a switching mechanism. The integrated mechanism has a function of releasably integrating the intermediate plate 8 with the second plate 7, and the switching mechanism. The intermediate plate 8 is integrated with the second plate 7 by the integration mechanism, and the integrated state in which the second viscoelastic body layer 10 interposed therebetween is not shear-deformed and the integrated state is released. In addition, the switching mechanism is provided with a function of switching between an integrated release state that allows shear deformation of the second viscoelastic body layer 10 between them, and the switching mechanism maintains the integrated state when the vibration is less than a predetermined magnitude. The mechanism is such that the integrated state is released by shaking exceeding the size.

  The specific configuration of the mechanism 14 is not limited, but, for example, as shown in FIG. 1 (c), the plate portion 15 projecting inward from the base plate 12 and the intermediate plate 8 are partially overlapped. The connecting structure is such that the pin 16 is passed through the overlapping portion, and the second plate 7 and the intermediate plate 8 are kept in an integrated state by the connecting action of the pin 16 when the swing is less than a predetermined size, and exceeds the size. It is possible to use a pin that is broken so that the integrated state of the second plate 7 and the intermediate plate 8 is released.

  Further, as shown in FIG. 1 (d), a part of the intermediate plate 8 is projected between a pair of plate portions 17 and 17 projecting inwardly from the base plate 12, and the fastening mechanism 18 For example, it is fastened by a mechanism such as a bolt that uses a spring, and the second plate 7 and the second plate 7 are moved by a static frictional resistance force between the pair of plate portions 17 and 17 and the intermediate plate 8 when the swing is less than a predetermined size. The intermediate plate 8 maintains an integrated state, and the pair of plate portions 17 and 17 and the intermediate plate 8 slide due to shaking exceeding the size, and the integrated state of the second plate 7 and the intermediate plate 8 is released. It is also possible to use one that has been adapted to do so.

  In the present embodiment, the switching mechanism is set so that the integrated state is not canceled by a large-scale earthquake, but is not canceled by a shake caused by a small and medium-sized earthquake that can occur on a daily basis.

  In the above-described vibration control panel 1, in the case of horizontal shaking caused by an earthquake as shown in FIG. 2, when the shaking is a shaking of a predetermined magnitude or less like a small and medium earthquake that can occur on a daily basis, FIG. (A) As shown in (B), the integrated state of the second plates 7 and 7 and the intermediate plates 8 and 8 is maintained, and only the first viscoelastic layers 9 and 9 undergo shear deformation. Thus, the energy of such a small shaking can be absorbed efficiently.

  When the shaking is a large shaking exceeding a predetermined magnitude such as a large earthquake, the second plates 7 and 7 and the intermediate plate 8 are integrated with each other as shown in FIGS. The first viscoelastic body layers 9 and 9 and the second viscoelastic body layers 10 and 10 are subjected to shear deformation to withstand such a large shaking, and the energy of the shaking is made efficient. Can absorb well.

  In addition, when the integrated and combined switching mechanism 14 is composed of a mechanism using the pin 16 as shown in FIG. 1 (C), if the fracture pin is replaced after a large earthquake, it can be effective for subsequent earthquakes. In addition, in the case of a mechanism using friction as shown in FIG. 1 (d), it can be applied to subsequent earthquakes without such repair work even after a major earthquake.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, the case where the switching from the integrated state to the integrated release state is performed due to the shaking of the small and medium earthquake or the shaking of the large earthquake is described, but the switching is performed based on other criteria. It may be made.

  Moreover, in said embodiment, although the case where it applied to the damping panel 1 for walls was shown, there is no restriction | limiting in the object to apply, and it applies and uses it for the various site | parts of various structures including a building. It is something that can be done.

  In the above embodiment, the case where the member sandwiching the viscoelastic body layer is linearly moved to cause the viscoelastic body layer to undergo shear deformation. May be configured in a seismic control mechanism configured to cause a relative rotational displacement to cause the viscoelastic body layer to undergo shear deformation.

  Moreover, there is no restriction | limiting about the specific form of a 1st, 2nd material or an intermediate material, and an intermediate material consists of the some intermediate material which made the viscoelastic body layer the bonding state, and was in an integrated state. Switching to the integrated release state may be performed in a plurality of stages exceeding two stages.

  Furthermore, in the above-described embodiment, the switching mechanism is a mechanism in which an integrated state is maintained when the swing is less than a predetermined magnitude, and the integrated state is released by the swing exceeding the magnitude. However, in the present invention, a switching operation on the switching mechanism can be used as a vibration control mechanism that absorbs the energy of the vibration for a vibration of a predetermined magnitude or less, or for a vibration exceeding the magnitude. It may be configured as a switching operation type vibration control mechanism that can be a vibration control mechanism that absorbs the energy.

FIG. 1A is a front view of a vibration control device constituting the vibration control mechanism, FIG. 2B is a plan view thereof, and FIG. 3C is an example of an integrated and combined switching mechanism. FIG. 4D is an enlarged plan view showing another example of the combined switching mechanism. It is a front view of the damping panel which applied the damping device of FIG. FIGS. (A) and (b) are plan views showing the operating state of the vibration control device in the integrated state, and FIGS. (C) and (D) are plan views showing the operating state of the vibration control device in the integrated release state. .

Explanation of symbols

3 ... Damping device (damping mechanism)
6 ... 1st plate (1st material)
7. Second plate (second material)
8 ... Intermediate plate (intermediate material)
9 ... 1st viscoelastic body layer 10 ... 2nd viscoelastic body layer 14 ... Integrated and combined switching mechanism

Claims (2)

An intermediate material is disposed between a first material having a joint portion connected to the structure to be controlled and a second material having a joint portion similarly connected to the structure to be controlled, and the first material. The first and second viscoelastic layers having a predetermined thickness are interposed between the second material and the intermediate material, and between the second material and the intermediate material, and the structure to be controlled. By the relative movement of the first material and the intermediate material, the first viscoelastic body layer between them undergoes shear deformation and absorbs the energy of the vibration, and the relative movement of the second material and the intermediate material causes the relative movement between the first material and the intermediate material. The second viscoelastic body layer is subjected to shear deformation to absorb the energy of shaking, and
An integrated mechanism for releasably integrating the intermediate material with either the first material or the second material is provided,
An integrated state in which the intermediate material is integrated with the one by the integration mechanism and the viscoelastic body layer interposed therebetween is not shear-deformed, and the integrated state is canceled to cancel the viscosity between them. A vibration control mechanism comprising a switching mechanism for switching between an integrated release state that allows shear deformation of an elastic layer.   The vibration control mechanism according to claim 1, wherein the switching mechanism is a mechanism that maintains an integrated state when the swing is less than a predetermined magnitude, and releases the integrated state when the swing exceeds the magnitude.

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