JP2012013215A - Vibration control structure with trigger mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control structure that can make a viscous elastic body effectively absorb vibration energy irrespective of a large vibration or a small vibration, and can sufficiently secure rigidity at the small vibration, and can increase a limit shearing deformation capacity of the viscous elastic body at the large vibration.SOLUTION: Small vibration controlling viscous elastic bodies 4, 4 and a large vibration controlling viscous elastic body 3 are connected with each other with a first plate 1 and a second plate 2 set in parallel states, the small vibration controlling viscous elastic body 4 and the large vibration controlling viscous elastic body 3 are in a range of the limit shearing deformation capacity at the small vibration, at the same time, the large vibration controlling viscous elastic body 3 is in the range of the limit shearing deformation capacity in the large vibration, the small vibration controlling viscous elastic bodies 4, 4 are formed so as to exceed the limit shearing deformation capacity, and the connection of the first plate 1 and the second plate 2 by the small vibration controlling viscous elastic bodies 4, 4 is released at the large vibration.

Description

  The present invention relates to a vibration control structure with a trigger mechanism.

  A damping structure in which a viscoelastic body is interposed between the plates and the viscoelastic body is subjected to shear deformation by relative displacement of both plates due to vibration, thereby absorbing the vibrational energy in the viscoelastic body. Has been known as a seismic control structure that allows a viscoelastic body to absorb vibration energy during both large and small vibrations.

JP 2008-7935 A

  However, in the seismic control structure as described above, if the limit shear deformation capacity of the viscoelastic body is increased to absorb the vibration energy effectively during a large vibration, the rigidity during a small vibration cannot be secured sufficiently. The behavior tends to become unstable. On the other hand, if sufficient rigidity is ensured during small vibrations, the limit shear deformation capacity of the viscoelastic body decreases, and the viscoelastic body breaks during large earthquakes. Therefore, there is a problem that the viscoelastic body cannot easily absorb the vibration energy.

  In view of the above problems, the present invention can effectively absorb the vibration energy in the viscoelastic body regardless of whether it is a large vibration or a small vibration, It is an object of the present invention to provide a vibration control structure that can sufficiently ensure rigidity and can increase the limit shear deformation capability of a viscoelastic body during a large earthquake.

The above problem is that a viscoelastic body for controlling large vibrations is interposed between the first and second cavities, which are relatively displaced by the vibration, so as to be in a state of joining with these quakes. The viscoelastic body for vibration control is subjected to shear deformation and absorbs vibration energy during a large vibration,
A viscoelastic body for vibration control with a small vibration smaller than the large vibration is interposed between the first and the second so as to be in a state of being joined to the two small vibrations. Sometimes, the viscoelastic body for damping small vibrations is adapted to absorb shear energy by shear deformation, and
The viscoelastic body for controlling small vibrations and the viscoelastic body for controlling large vibrations are connected in parallel with the first and second quakes,
At the time of the small earthquake, both the viscoelastic body for small vibration control and the viscoelastic body for large vibration control are within the range of the limit shear deformation capacity. The viscoelastic body for small vibration control is within the range of the shear deformation capacity, and exceeds the limit shear deformation capacity. This is solved by a seismic control structure with a trigger mechanism, wherein the connection between the first and second chins is released (first invention).

  In this structure, the viscoelastic body for small vibration control is set to exceed the limit shear deformation capacity at the time of large earthquake, so the rigidity of the viscoelastic body for small vibration control at the time of small vibration is accordingly increased. Can be secured sufficiently high, so that the behavior at the time of a small vibration can be stabilized.

  In addition, since the viscoelastic body for small vibration control is responsible for ensuring rigidity during small earthquakes, it is not necessary for the viscoelastic body for large vibration suppression to ensure rigidity during small earthquakes. It is possible to increase the limit shear deformation capacity of the vibration control viscoelastic body. During a large earthquake, the small-vibration damping viscoelastic body exceeds the limit shear deformation capacity, and the first and second gangs are disconnected from the small-vibration damping viscoelastic body. That is, the trigger function works, and the viscoelastic body for large vibration control is within the range of the limit shear deformation capacity, so the viscoelastic body for large vibration control is within the range of the large limit shear deformation capacity, It can absorb vibration energy.

  Since both the viscoelastic body for small vibration control and the viscoelastic body for large vibration control are composed of viscoelastic bodies, the viscoelastic body can be used regardless of whether the vibration is large or small. The elastic body can effectively absorb vibration energy.

  In the first invention, the joining of the viscoelastic body for controlling small vibrations to at least one of the first and second quakes is a friction joining, and the friction joining portion is attached to the friction joining portion during the great shaking. It is preferable that the first and second joints by the joint with the viscoelastic body for damping small vibrations are released by causing the slip (second invention). .

  In this case, absorption of vibration energy during large earthquakes is not only caused by shear deformation of the viscoelastic body for large vibration control, but also by slipping at the friction joints, thereby further absorbing vibration energy during large earthquakes. It can be effective and effective, and since it only causes slippage during a large vibration, the surroundings are less likely to be damaged and repair can be facilitated.

  Further, in the first invention, when the viscoelastic body for damping a small vibration is broken during the large earthquake, the first and second viscoelastic bodies by the joining with the viscoelastic body for damping a small deformation are connected. It may be configured such that the connection with the glue is released (third invention). In that case, the function and effect achieved by the first invention can be realized with a simple structure.

  Needless to say, the concept of the words “large” and “small” is a relative concept of one to the other and does not indicate a specific size or a size of a specific range.

  Since the seismic control structure with a trigger mechanism of the present invention is as described above, the viscoelastic body can effectively absorb the vibration energy regardless of whether it is a large vibration or a small vibration. Nevertheless, it is possible to sufficiently ensure the rigidity at the time of a small vibration and to increase the limit shear deformation ability of the viscoelastic body at the time of a large vibration.

FIG. 1 shows a vibration control structure of a first embodiment, in which FIG. (A) is a front view and FIG. (B) is a plan view. Fig. (A-1) and Fig. (I-2) are plan views showing the operating state during small earthquakes, and Fig. (B-1) and Fig. (B-2) are plan views showing the operating state during large earthquakes. is there. FIG. 2 shows a vibration control structure of a second embodiment, in which FIG. (A) is a front view and FIG. (B) is a plan view. Fig. (A-1) and Fig. (I-2) are plan views showing the operating state during small earthquakes, and Fig. (B-1) and Fig. (B-2) are plan views showing the operating state during large earthquakes. is there. The damping structure of 3rd Embodiment is shown, A figure (I) is a front view, A figure (B) is a side view. Fig. (A) is a side view showing the vibration control structure of the fourth embodiment, and Fig. (B) is a side view of the fifth embodiment.

  Next, embodiments of the present invention will be described with reference to the drawings.

  The first embodiment of the vibration control structure with a trigger mechanism shown in FIG. 1 is applied to a vibration control device, where 1 is a first plate as a first and 2 is a second These are the second plates, and these first and second plates 1 and 2 are arranged so that the surfaces face each other and are reciprocally displaced in the direction in which the surface spreads by horizontal vibration such as an earthquake. Is provided.

  Between the first and second plates 1 and 2, a viscoelastic body 3 for controlling large vibration is interposed so as to be joined to the plates 1 and 2 by adhesion or the like. The plates 1 and 2 are connected to each other so that, during a large vibration, the viscoelastic body 3 for controlling a large vibration undergoes shear deformation to absorb the vibration energy.

  Further, between the first and second plates 1 and 2, the damping viscoelastic bodies 4 and 4 having a small vibration smaller than the above large vibration are disposed on both sides sandwiching the viscoelastic body 3 for large vibration damping. In this embodiment, it is located on both the left and right sides, and is arranged in parallel with the viscoelastic body 3 for controlling large vibrations, and is joined to the first and second plates 1 and 2. The first and second plates 1 and 2 are connected to each other, and during the small vibration, the small vibration damping viscoelastic bodies 4 and 4 are subjected to shear deformation to absorb the vibration energy.

  In the present embodiment, the small-vibration damping viscoelastic bodies 4 and 4 and the large-vibration damping viscoelastic body 3 are, for example, viscoelastic bodies having the same critical shear deformation amount per unit thickness dimension. The thickness dimensions are set so that the viscoelastic bodies 4 and 4 for small vibration control are small and the viscoelastic body 3 for large vibration control is larger than that, The viscoelastic bodies 4 and 4 for controlling small vibrations and the viscoelastic body 3 for controlling large earthquakes are both within the range of the limit shear deformation capacity. The viscoelastic bodies 4 and 4 for controlling small vibrations are within the range of shear deformation capacity and exceed the limit shear deformation capacity, that is, the trigger function is activated. So that the connection between the first plate 1 and the second plate 2 by the joining with the viscoelastic bodies 4 and 4 is released. It is. The bent shape of the first plate 1 and the second plate 2 corresponds to the difference between the thickness dimension of the viscoelastic body 3 for large vibration control and the thickness dimension of the viscoelastic bodies 4 and 4 for small vibration control. It is.

  In the present embodiment, one surface portion of each of the small-vibration damping viscoelastic bodies 4 and 4 is joined to one plate 1 by adhesion or the like, but the other surface portion is a friction surface 5. Since the friction plate is friction-bonded to the other plate 2 and slips in the friction-joined portion of the friction surface 5 during a large vibration, the second vibration-damping viscoelastic bodies 4 and 4 are used as described above. The connection between the first plate 1 and the second plate 2 is released.

  In the above structure, the viscoelastic bodies 4 and 4 for controlling small vibrations during a large earthquake are set so as to exceed the limit shear deformation capacity. The rigidity of 4 and 4 can be secured sufficiently high, whereby the behavior at the time of the small vibration shown in FIGS. 2 (A-1) and (A-2) can be stabilized.

  Moreover, since the viscoelastic bodies 4 and 4 for controlling small vibrations are responsible for securing rigidity during small earthquakes, it is not necessary for the viscoelastic body 3 for controlling large vibrations to ensure rigidity during small earthquakes. Therefore, the limit shear deformation ability of the viscoelastic body 3 for controlling large vibrations can be increased. When large earthquakes occur, as shown in FIGS. 2 (B-1) and (B-2), the small-vibration damping viscoelastic bodies 4, 4 exceed the limit shear deformation capacity, and the small-vibration damping viscoelastic bodies 4 and 4 The connection between the first plate 1 and the second plate 2 by the elastic bodies 4 and 4 is released, and the viscoelastic body 3 for controlling large vibrations is within the limit shear deformation capacity. The viscoelastic body 3 can absorb the vibration energy within the range of its large limit shear deformation ability.

  In particular, in the present embodiment, since the friction surfaces 5 and 5 are caused to slip during a large vibration, the absorption of the vibration energy during the large vibration is only the shear deformation of the viscoelastic body 3 for controlling large vibration. Rather, it is performed by sliding on the friction surfaces 5 and 5, and the absorption of vibration energy during a large vibration can be made even more effective.

  And since both the viscoelastic bodies 4 and 4 for controlling small vibrations and the viscoelastic body 3 for controlling large vibrations are made of viscoelastic bodies, as shown in FIG. The viscoelastic body can effectively absorb the vibration energy regardless of whether the vibration is small or small.

  In the vibration control structure with a trigger mechanism of the second embodiment shown in FIG. 3 and FIG. 4, one surface portion of each small vibration control viscoelastic body 4, 4 is joined to one plate 1 by adhesion or the like, The other surface part is also joined to the other plate 2 by bonding or the like, and during a large earthquake, as shown in FIGS. When 4 breaks in the middle part in the thickness direction (this is a trigger in this embodiment), the first plate 1 and the second plate 2 are connected by the viscoelastic bodies 4 and 4 for vibration control during small deformation. Is to be released. Others are the same as those in the first embodiment, and the same effects are achieved.

  The third embodiment of the damping structure with a trigger mechanism shown in FIG. 5 is provided with the viscoelastic bodies 4 and 4 for controlling small vibrations so as to be positioned on both upper and lower sides sandwiching the viscoelastic body 3 for controlling large vibrations. It is a thing. Others are the same as those in the first and second embodiments.

  The vibration control structure with a trigger mechanism of the fourth embodiment shown in FIG. 6 (a) is provided with viscoelastic bodies 3, 3 for large vibration control on both upper and lower sides sandwiching the viscoelastic body 4 for small vibration control. Compared to the structure shown in FIG. 5, the small-vibration damping viscoelastic body 4 can stabilize the behavior after slipping or breaking, that is, the behavior at the time of a large earthquake. Others are the same as those in the first and second embodiments.

  The vibration control structure with a trigger mechanism according to the fifth embodiment shown in FIG. 6 (B) employs a two-sided bonding method. Others are the same as those in the first and second embodiments.

  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-described embodiment, as the viscoelastic body 3 for large vibration control and the viscoelastic bodies 4 and 4 for small vibration control, viscoelastic bodies having the same critical shear deformation amount per unit thickness dimension are used. Although the case of the viscoelastic body 3 for controlling large vibrations or the viscoelastic body 4 for controlling small vibrations is shown by changing the thickness dimension, the amount of critical shear deformation per unit thickness dimension is different. The viscoelastic body having the same thickness may be used as a viscoelastic body for large vibration control or a viscoelastic body for small vibration control, or various modes may be adopted.

1 ... 1st plate (1st gawa)
2 ... 2nd plate (2nd gawa)
3 ... Viscoelastic body for controlling large vibrations 4 ... Viscoelastic body for controlling small vibrations 5 ... Friction surface

Claims (3)

A viscoelastic body for controlling large vibrations is interposed between the first and second wings, which are displaced relative to each other by vibration, so as to be in a state of joining with these wings. The viscoelastic body for controlling large earthquakes is adapted to absorb shear energy by shearing deformation,
A viscoelastic body for vibration control with a small vibration smaller than the large vibration is interposed between the first and the second so as to be in a state of being joined to the two small vibrations. Sometimes, the viscoelastic body for damping small vibrations is adapted to absorb shear energy by shear deformation, and
The viscoelastic body for controlling small vibrations and the viscoelastic body for controlling large vibrations are connected in parallel with the first and second quakes,
At the time of the small earthquake, both the viscoelastic body for small vibration control and the viscoelastic body for large vibration control are within the range of the limit shear deformation capacity. The viscoelastic body for small vibration control is within the range of the shear deformation capacity, and exceeds the limit shear deformation capacity. A seismic control structure with a trigger mechanism characterized in that the connection between the first and the second is released.   The joint of the viscoelastic body for controlling small vibrations to at least one of the first and second quakes is a friction joint, and at the time of the large earthquake, the friction joint is slipped. 2. The damping structure with a trigger mechanism according to claim 1, wherein the connection between the first and second saws by the joint with the viscoelastic body for damping small vibrations is released. .   When the viscoelastic body for controlling small vibrations breaks during the large earthquake, the connection between the first and the second glue due to the joining with the viscoelastic body for controlling vibrations during the small deformation is released. The vibration control structure with a trigger mechanism according to claim 1, wherein

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