JPS63171964A - Earthquakeproof device for structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a vibration control device capable of suppressing vibrations of structures caused by wind, earthquakes, etc.

(b), Prior Art Recently, in structures such as observation towers, high-rise residential buildings, and high-rise office buildings, where the primary natural vibration period of flexible structures is relatively long, the structure is located near the top of the structure. Attempts are being made to reduce the shaking of structures caused by wind or earthquakes by installing vibration control devices to absorb the vibration energy of objects.

(C) 0 Problems to be solved by the invention Most of these vibration damping devices are composed of large-scale mechanical devices that swing balance weights, and the reliability of the devices over time and maintenance and inspection cannot be guaranteed. There are many problems in this respect.

In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a vibration damping device that has reliability over time and can be easily maintained and inspected without using complicated mechanical devices. It is something to do.

(d) Means for solving the zero problem, that is, the present invention provides a solution to the liquid tank (5b) filled with the liquid (5b).
a), and the liquid tank (5a) is provided with a damping member (5c15d15e) for damping the vibration of the liquid (5b).

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description should not be limited to the descriptions in the drawings. The following r (el
The same applies to the column ``, action''.

(e) 0 effect With the above-described configuration, the present invention absorbs vibrations of the structure due to wind or earthquakes in the form that the liquid (5b) in the liquid tank (5a) oscillates and absorbs the vibration energy. It works like this.

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a diagram showing an example of a structure in which an embodiment of the vibration damping device according to the present invention is used, FIG. 2 is a perspective view showing an example of the arrangement of the vibration damping device, and FIG. 4 is a front sectional view of the vibration damping device shown in FIG. 3, FIG. 5 is a plan view showing another embodiment of the vibration damping device, and FIG. 6 is a top view of the vibration damping device shown in FIG. A front sectional view of the vibration damping device, FIG. 7 is a plan view showing another embodiment of the vibration damping device, FIG. 8 is a front sectional view of the vibration damping device shown in FIG. FIG. 10 is a plan view of FIG. 9, FIG. 11 is a plan view showing yet another embodiment of the vibration damping device, and FIG. 12 is yet another example of the arrangement of the vibration damping device. FIG. 13 is a front view showing another example of a structure in which a vibration control device is used.

As shown in FIG. 1, a super high-rise building 1, which is a structure, has a structure 3 erected on the ground 2, and a vibration damping device according to the present invention is installed on the top 3a of the structure 3. 5 is installed. As shown in FIG. 2, two vibration damping devices 5 are installed so as to cross each other at right angles, and each vibration damping device 5 has a rectangular planar shape as shown in FIGS. 3 and 4. liquid tank 5
It has a. Each liquid tank 5a is injected with water or a liquid 5b having a viscosity equal to or higher than water, and stainless steel, vinylon, high-performance fibers, etc. are placed on both sides of the liquid tank 5a in the figure. A mesh 5C as a damping member consisting of the following is installed in two stages, upper and lower in the figure.

Since the superhigh-rise building 1 has the above configuration, when the structure 3 shakes due to an earthquake, strong wind, etc., the vibration control device 5 installed at the top 3a also shakes. Then, the liquid 5b in the restraining device 5 swings in synchronization with the vibration of the structure 3, as shown in FIGS. 3 and 4. That is, the oscillation period of the liquid 5b (the oscillation period of the liquid 5b is determined by the length Ll in the long side direction of the liquid tank 5a, the length L2 in the short side direction of the liquid tank 5a, and the length L2 in the short side direction of the liquid 5b, as shown in FIGS. 3 and 4). By matching the liquid height L3 (determined by the liquid height L3 in a static state) with the first natural vibration period of the high-rise building 1, the liquid 5b easily starts to oscillate due to the vibration of the high-rise building 1, and the wave causes the The vibration energy of the high-rise building 1 is absorbed. When the liquid 5b swings,
Due to this rocking, the liquid 5b passes through the mesh 5C installed in the liquid tank 5a in the vertical direction in FIG.
The viscous resistance that acts between the liquid 5b and the liquid 5b acts in a direction that restricts the movement of the liquid 5b. As a result, the vibration of the liquid 5b is attenuated, and the ability to absorb vibration energy is improved.

In addition, although the above-mentioned example described the case where Messi:L5C was used as the damping member provided in the liquid tank Sa,
The damping member may be of any form, shape, or installation manner as long as it can damp the vibration of the liquid 5b in the liquid tank 5a.For example, the mesh 5C may be As shown in the figure and FIG. 6, the liquid tank 5a
A plurality of them may be installed so as to be separated in the vertical direction as shown in FIG. In addition to the mesh 5C, for example, as shown in FIGS. 7 and 8, a partition wall 5d may be provided in the liquid tank 5a to separate it in the swinging direction of the liquid 5b, that is, in the horizontal direction in the figure. A large number of protrusions 5e are implanted on the partition wall 5d in a shape that matches the swinging form of the liquid 5b (i.e., with a concave center as shown in FIG. 8), and the protrusions 5e and the liquid 5b Of course, it is also possible to damp the vibration of the liquid 5b by the viscous resistance generated between the two. Furthermore, a material in the form of steel chips, a plastic molded product, or the like may be installed as a damping member in the liquid tank 5a.

In addition, it goes without saying that the manner in which the vibration damping devices 5 are arranged can be appropriately selected depending on the placement location and required damping performance.For example, as shown in FIGS. 9 and 10, Naturally, it is also possible to arrange a plurality of damping devices 5 in two orthogonal horizontal directions.

Further, the shape of the liquid tank 5a of the vibration damping device 5 is not limited to a rectangular planar shape, and a liquid tank 5a with a circular planar shape as shown in FIG. 11 can also be used. In addition,
At this time, the arrangement of the damping member such as the mesh 50 is
In order to effectively damp the vibration of the liquid tank 5a, the center C of the liquid tank 5a
It is desirable to arrange them radially from T. This circular liquid tank 5a can also be installed singly or in plural as shown in FIG. 12.

Further, as structures to which the vibration control device 5 according to the present invention is applied, flexible structures with a relatively long vibration period are suitable, and in addition to the super high-rise building 1 as shown in FIG. Of course, the present invention can also be applied to a tower 6 made of a steel frame or the like as shown in FIG. 13.

The amount of the liquid 5b in the liquid tank sa is such that the weight of free water that contributes to rocking is 1 to 3% of the weight of the structure (the larger the weight of free water, the higher the restraining effect), and the damping by the damping member. When the constant is about 2 to 10%, the restraining effect can be exerted.

(g) 0 Effects of the Invention As explained above, according to the present invention, the liquid tank 5a is provided with the liquid 5b, and the liquid 5b is injected into the liquid tank 5a.
Mesh 5c1 partition wall 5d, protrusion 5e that dampens the swing of b.
Since the damping member is provided, it is possible to effectively absorb vibrations caused by wind or earthquakes of structures such as the super high-rise building 1 and the tower 6 by swinging the liquid 5b.

In addition, since the structure does not have mechanically movable parts such as the liquid tank 5a and the liquid 5b, it has reliability over time compared to a mechanical restraint mechanism, and can be easily maintained and inspected. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a structure in which an embodiment of the vibration damping device according to the present invention is used, FIG. 2 is a perspective view showing an example of the arrangement of the vibration damping device, and FIG. 4 is a front sectional view of the vibration damping device shown in FIG. 3, FIG. 5 is a plan view showing another embodiment of the vibration damping device, and FIG. 6 is a top view of the vibration damping device shown in FIG. Front sectional view of seismic device, No. 7v
i! 8 is a front sectional view of the vibration damping device shown in FIG. 7, FIG. 9 is a perspective view showing another example of the arrangement of the vibration damping device, and FIG. FIG. 10 is a plan view of FIG. 9, FIG. 11 is a plan view showing yet another embodiment of the vibration damping device, FIG. 12 is a plan view showing yet another example of the arrangement of the vibration damping device, and FIG. FIG. 3 is a front view showing another example of a structure in which a vibration control device is used. 1... Structure (super high-rise building) 5... Damping device 5a... Liquid tank 5b... Liquid 5c... Damping member (Metshu) 5d...
- Damping member (partition) 5e... Damping member (protrusion) 6... Structure (tower) Applicant Mitsui Construction Co., Ltd. Agent Patent attorney Phase 1) Shinji (and 2 others) No. Figure 13 Figure 1 Figure 2 Figure 5 Figure 3 Figure 6 Figure 4 Figure 7 Figure 8 Figure 9 Figure 10 Figure 12

Claims (1)

[Claims] Installed on top of a structure to prevent vibration of the structure. In vibration damping devices for structures that absorb vibrations, having a liquid reservoir filled with liquid; a damper for damping the fluctuation of the liquid in the liquid tank; A seismic damping device for a structure made up of members.