JP3483535B2 - Damping structure - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to a vibration control structure building reduces from being deformed by an earthquake, in particular, relates to vibration control structure capable of reducing the deformation by adding to an existing building.

[Background Art] When an earthquake occurs, an acceleration is applied to the building by the vibration, and the building is deformed by this acceleration. The deformation of the building leads to the destruction of the building when this deformation is large. Especially for wooden buildings,
It has a period of 0.3 seconds to 0.4 seconds, and if there is an earthquake with the same period as this natural period, the deformation that occurs in the building due to the synchronization with the earthquake becomes large and the building is often destroyed.
Conventionally, in order to prevent the deformation, for example, the building itself has been devised, or the acceleration of the building has been controlled. The device (vibration control device) that controls the acceleration of the building is a device that reduces the deformation of the building by shifting the cycle of the building and prevents the building from being destroyed. However, it is difficult to apply earthquake countermeasures by the building itself to existing buildings because it is necessary to take measures at the construction stage. In addition, a device for controlling acceleration on a building is often huge or complicated and expensive, and there is no device suitable for a small building such as a wooden structure.

[0002]

SUMMARY OF THE INVENTION An object of the present invention is to provide a vibration control structure capable of controlling the acceleration of a building due to an earthquake with a simple structure .

In order to achieve the above object, the present invention provides an elastic body which is fixed to a substrate and which constitutes a first isolator, and a connecting portion which is fixed to the first isolator. A vibration control device that includes an elastic body that is fixed to the connection portion and that constitutes a second isolator, and a passive weight that is connected to the connection portion by the second isolator. Pair with the structure
It is a seismic control structure to be installed afterwards. The elastic bodies forming the first isolator and the second isolator preferably have different rigidity.

[0003]

Embodiments of the present invention will be described in detail with reference to the drawings. The present invention is a vibration control structure using a passive weight. A structural example of the vibration control device used in the present invention will be described in detail with reference to FIG. 1 (a) and 1 (b) show sectional views of a vibration control device used in the present invention. FIG. 1A is a side sectional view.
It is sectional drawing in the line shown by BB of (b). Figure 1
FIG. 1B is a sectional view taken along the line AA of FIG. In FIGS. 1A and 1B, elastic bodies 152, 15 fixed to the bottom surface 120 are provided in the housing 110.
The plate 132 is placed on 4, 156 and 158. The elastic bodies 152 to 158 and the plate 132 are fixed. Elastic members 162, 164, 166, 168 are fixed to the plate 132. A plate 134 is fixed to the elastic bodies 162 to 168, and a weight 140 is fixed on the plate 134. The elastic bodies 152 to 158 form a first isolator, and the elastic bodies 162 to 168 form a second isolator. Elastic bodies 152-158 and elastic bodies 162-
The rigidity is different from that of 168. The vibration control device used in the present invention is characterized in that the weight 140, which is a passive weight, is indirectly supported by two types of isolators having different rigidity. How these two types of isolators work to perform the vibration control function will be described in detail with reference to FIG.

FIGS. 2 (a) to 2 (i) are views for explaining how the above-described vibration control device operates when an earthquake occurs to control the vibration. Fig. 2 (a) is a diagram of a stationary state which is a steady state, and an earthquake occurs in this state. FIG. 2B is a diagram when an earthquake occurs. First,
It shows that acceleration to the right is occurring. At this time, as shown in FIG. 2B, only the elastic bodies 152 to 158 forming the first isolator are deformed, and the action of the inertia force of the weight 140 and the action of the two isolators are performed. And the weight 140 is not moving. Figure 2
(C) shows the case where the inertial force when the rightward force is applied becomes the maximum. At this time, the weight 140 has not moved yet, but the elastic members 162 to 162 forming the second isolator are used.
It can be seen that 168 is also deformed. FIG. 2D illustrates elastic bodies 152 to 158 and elastic bodies 162 to 158 due to seismic force.
168 shows a state in which the 168 is moving to the right at the maximum speed, and at this time, the external force is 0. Weight 140 is moving to the right. Then, in FIG. 2 (e), the force to the left side starts. Weight 140 is still moving to the right. Figure 2
(F) shows the case where the inertial force is maximized when the left side is applied. FIG. 2 (g) shows a case where the force is still applied to the left side, at which time the weight 140 returns to the center. Then, in FIG. 2 (h), the force to the right side starts, but at this time, the weight 140 moves to the left side. Figure 2
(I) shows the case where the inertial force is maximized when the force is applied to the right side. As can be seen from these figures, in the above-described vibration control device, two types of vibration modes are generated by using elastic bodies having different rigidity. Due to the interaction of the inertial forces generated by this, it is possible to suppress a decrease in the inertial resistance to the input seismic wave. For this reason, above
The above-mentioned seismic control device shifts the period of the building so that it does not match the period of the seismic wave, and for a longer time,
Can absorb seismic energy.

[0005] that you use a combination of the above-mentioned vibration control device
Is the present invention. FIG. 3 is a diagram showing a state in which the above-described vibration control device is installed as a pair structure with respect to a roof structure often seen in wooden houses. As shown in FIG. 3, the vibration damping devices 200 and 300 are paired and installed according to the roof ridge structure. Thus, symmetrically control the ridge position
By installing a seismic device, the seismic force can be controlled in a well-balanced manner, and the force of the earthquake can be efficiently absorbed without twisting. In addition, the two seismic damping devices are combined and installed symmetrically, so the structure does not easily fall from the roof. Moreover, the combined placement of the two seismic controls also has the effect of increasing the horizontal inertial forces of the passive weights 240 and 340.

[0006]

The above-described vibration control structure of the present invention can efficiently control a seismic wave with a simple structure . Control
By placing the seismic device in pairs, efficiently Damping
ing.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of the structure of a vibration control device used in the present invention.

FIG. 2 is a diagram showing the movement of the vibration control device used in the present invention during an earthquake.

FIG. 3 is a diagram showing an example of the vibration control structure of the present invention.

[Explanation of symbols]

110 housing 120 bottom 132 plates 134 plates 152, 154, 156, 158 Elastic body 162, 164, 166, 168 Elastic body

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16F 15/02 E04B 1/98 E04D 13/00 E04G 23/02 E04H 9/02 341

Claims (2)

(57) [Claims] 1. An elastic body which is fixed to a substrate and constitutes a first isolator, a connecting portion which is fixed to the first isolator, and a second isolator which is fixed to the connecting portion. A seismic control device comprising a constituent elastic body and a passive weight which is connected to the connecting portion by the second isolator, is installed as a pair in accordance with a roof ridge structure. . 2. The vibration control structure according to claim 1, wherein in the vibration control device, elastic bodies forming the first isolator and the second isolator have different rigidity. Characteristic damping structure.