JP2699803B2 - High damping structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-damping structure for effectively exerting a function of a damper installed in the structure.

[0002]

When a damper is installed inside a structure for the purpose of damping the vibration of a structure, particularly a high-rise building, the damper is shown in FIG. 8 regardless of whether it is a viscous damper or an elasto-plastic damper. As shown in the figure, the damper is installed between the layers so that a damping force is generated at the time of the displacement between the layers. However, the higher the building is, the softer the building becomes.

FIG. 9 shows resonance curves of a structure having the same proportions when a damping factor is 0 and ∞, which is used in a method of obtaining an optimum damping of a structure when a damper is installed between layers. However, since the coordinates of the intersection (fixed point) of the two curves do not change even when the attenuation rate changes, if the attenuation rate is set so that the resonance curve has the maximum value at this fixed point as shown by the broken line, That is the optimal damping rate. The coordinate of this fixed point in the resonance height direction is the resonance frequency ω of the resonance curve with a damping rate of 0.
_The smaller the distance between ₀ and the resonance frequency ω ₁ of the resonance curve of ∞, the smaller the value, and the smaller the value, the higher the damping effect. However, the frequency of high-rise buildings depends on the height and proportion, especially
In the case of a building with 20 floors or more, as shown in FIG. 10, ω ₀ and ω ₁ are close to each other, and the level of the fixed point is raised, so even if a damper is installed between layers, the effect of the damper will not be substantially exhibited .

The present invention has been made by paying attention to the relationship between a building and a damping factor, and aims at newly proposing a structure which exerts its effect when a damper is installed.

[0005]

According to the present invention, a structure is divided into a plurality of unit structures on at least an arbitrary layer on a plane, and the unit structures of the separated layer are pin-joined to both sides. Ω ₀ and ω ₁
Is increased, the fixed point level of the resonance curve is lowered, and the function of the damper is effectively exhibited.

For example, as shown in FIG. 2, a unit structure which is separated over the whole layer on a plane and connected to an erecting member which is pin-joined to both sides has a slender proportion, which lowers the frequency and reduces the resonance. The frequency ω ₀ is small. On the other hand, the proportions of the structures shown in FIG. 3 in which the unit structures are connected by a damper having a damping rate of ∞ become thicker and shorter as a whole, so that the frequency is high, and the resonance frequency ω ₁
Ω ₀ and ω ₁ are greatly separated from each other as shown in FIG. 4, and as a result, the intersection (fixed point) of both resonance curves decreases.
Therefore, as shown by a solid line in FIG. 4, a damper for setting a damping rate such that the resonance curve reaches a maximum value at this fixed point is installed between the unit structures of each layer as shown in FIG. It can be seen that the effect of damping is enhanced, so that the effect of the damper installed between the layers is effectively exerted, and the damping performance of the entire structure can be improved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing one embodiment.

As shown in FIG. 1, a high attenuation structure 1 according to the present invention is composed of a plurality of unit structures 10, 10 divided on a plane by at least arbitrary layers, and adjacent unit structures 10, 10 are formed.
Are separated from each other and connected by an erecting member 2 such as a beam which is erected between the two and pin-joined to each other. At the same time, at least a part of the erection layer where the erecting member 2 is erected is attached to the unit structures 10 and 1
By installing the damper 3 that generates a damping force when the relative displacement is between 0, the function of the damper 3 is effectively exerted, and the damping performance of the entire structure 1 is enhanced. For the damper 3, a viscous damper or a steel damper is used, and the material is not limited.

As shown in FIG. 4, the damping rate of the high damping structure 1 is a resonance curve of a non-damped structure shown in FIG. And the damper 3 passes through the intersection (fixed point) of the resonance curve of the structure in which the damper having the damping rate of 接 続 is connected between the unit structures 10 and 10 shown in FIG. The resonance curve is drawn as a solid line in FIG. 4, and has an optimum damping rate in a structure having a certain proportion.

FIG. 5 shows that the high damping structure 1 is divided into unit structures 10 over all layers, the erection members 2 are erected on all layers between the unit structures 10, 10, and the damper 3 is provided only on the upper layer. If the structure is divided over all layers, the installation layer of the damper 3 is installed in the structure connected only by the erection member 2 to which the unit structures 10 and 10 are joined by pins. decay rate is not limited as long as the position to increase the resonance vibration number ω ₁ of the resonance curve of ∞. The installation layer of the damper 3 for obtaining the optimum damping rate is determined by the state of division of the structure, that is, the relationship between the installation layer of the installation member 2 and the installation layer of the damper having a damping rate of ∞, and the intersection point between the resonance curves of the two. Determined by

FIG. 6 shows a unit structure 1 only in the intermediate layer.
It is divided into 0, 10
Is installed at the same time as when the damper 3 is installed. In this case as well, the damper 3 is located at a position where ω ₁ is higher than a structure in which only the installation member 2 connected to the intermediate layer (divided layer) by pins is connected. Is provided, the difference between ω ₀ and ω ₁ becomes large, and an optimal attenuation rate can be obtained. FIG. 7 shows an appearance of the high attenuation structure 1 shown in FIG.

[0012]

As described above, the present invention divides a structure into a plurality of unit structures on at least an arbitrary layer on a plane, and pin-joins the separated unit structures to both sides. The damper sets the damping rate to a maximum value at the intersection of the two curves by increasing the difference between the resonance frequencies ω ₀ and ω ₁ when the damping rate is 0 and when the damping rate is ∞. Is installed on the layer connected by the erection member, thereby increasing the damping effect of the damper.Therefore, the effect of the damper installed between the layers is effectively exhibited, and the damping performance of the entire structure can be improved. it can.

As a result, a larger damping effect can be obtained with a smaller number of dampers than in the prior art.

[Brief description of the drawings]

FIG. 1 is an elevation view showing an outline of a high damping structure.

FIG. 2 is an elevational view showing a structure having the same proportions as in FIG. 1 but having an attenuation factor of 0.

FIG. 3 is an elevational view showing a structure having the same proportion as in FIG. 1 and a damping ratio of Δ.

4 is a graph showing resonance curves of the structure of FIG. 2, the structure of FIG. 3, and the structure of FIG. 1;

FIG. 5 is an elevational view showing an embodiment in which a damper is installed only in an upper layer portion.

FIG. 6 is an elevational view showing an embodiment in a case where a structure is separated only at an intermediate layer and a damper is installed in the intermediate layer.

FIG. 7 is an elevation view showing the appearance of FIG. 6;

FIG. 8 is an elevation view showing an outline of a conventional structure.

FIG. 9 is a graph showing a relationship between a resonance curve in a case where the attenuation factor is 0 and a resonance curve in the case of ∞ and a resonance curve for obtaining an optimum attenuation.

FIG. 10 is a graph showing resonance curves of a conventional structure when the attenuation rate is 0 and when the attenuation rate is ∞.

[Explanation of symbols]

1 ... high damping structure, 10 ... unit structure, 2 ... erection member, 3 ... damper.

Claims (1)

(57) [Claims] 1. A planar structure comprising a plurality of unit structures divided by at least an arbitrary layer on a plane, and a separated layer of adjacent unit structures is erected between both unit structures, and pin-joined to both. A damper that generates a damping force on at least a part of the layer on which the erection member is erected, and only the erection member to which the adjacent unit structure is pin-joined. The maximum value of the resonance height is defined as the intersection of the resonance curves of the structures connected to each other when the damping rate is 0 and the resonance curves of the structures when adjacent unit structures are connected by a damper that sets the damping rate to ∞. A high damping structure in which the damping rate of the structure is set by a damper.