JPH01146083A - Vibration-damping structure of building - Google Patents

Abstract

PURPOSE: To hold age-based reliability by providing a liquid tank having a flat wave motion water surface longitudinal in the wave moving direction, with damping members for damping vibration of liquid, to constitute a vibration control device, and installing the vibration control devices at the upper part of a structure so as to face two horizontal directions. CONSTITUTION: Control devices 5 are installed at the top part 3a of a structure body 3 of a multistoried building 1. In each device 5, water or liquid 5b larger in viscosity than water is filled in a rectangular liquid tank 5a, and meshes or the like serving as damping members are provided at longitudinal right and left side parts. The devices 5 are disposed facing at least two directions according to a layout place and required vibration damping performance. The vibration cycle of the liquid 5b is made to coincide with the primary vibration cycle of the building 1 to absorb vibrational energy of the building 1 by the vibration of the liquid 5b, and the liquid 5b is passed through the meshes or the like to improve vibrational energy absorbing capability. Reliability with the lapse of time can therefore be held.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a vibration damping structure capable of suppressing vibrations of structures caused by wind, earthquakes, and the like.

(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 a flexible structure 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 damping 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 inspections cannot be guaranteed. There are many problems in this respect.

In order to eliminate the above-mentioned drawbacks, the present invention provides a vibration damping structure for a structure that has reliability over time and can be easily maintained and inspected without using complicated mechanical devices. The purpose is to

(d) Means for solving the zero problem, that is, the present invention provides that the oscillation device (5) has a flat wave water surface (5
f) filled with liquid (5b);
), the liquid tank (5a) is provided with damping members (5c, 5d, 5e) for damping the vibration of the liquid, and a plurality of the vibration damping devices (5) are provided, each of the vibration damping devices (5) The liquid tank (5a) is installed with the longitudinal direction (WD) facing at least two horizontal directions of the structure (1).

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

(e) Zero effect With the above-described configuration, the present invention is capable of suppressing vibrations of the structure (1) due to wind or earthquakes by shaking the liquid (5b) in the liquid tank (5a) of each vibration damping device (5). act to absorb the vibration energy.

(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 damping structure according to the present invention is used, Fig. 2 is a perspective view showing an example of the arrangement of the damping device, and Fig. 3 is a diagram showing an example of the arrangement of the damping device. 4 is a front sectional view of the damping device shown in FIG. 3, FIG. 5 is a plan view showing another embodiment of the damping device, and FIG. 6 is a top view of the damping device shown in FIG. 5. A front sectional view of the vibration damping device, FIG. 7 is a plan view showing yet another embodiment of the vibration damping device, FIG. 8 is a front sectional view of the vibration damping device of FIG. 7, and FIG. 9 is another example of the vibration damping device. FIG. 10 is a plan view of FIG. 9, FIG. 11 is a plan view showing yet another arrangement of the vibration damping device, and FIG. 12 is yet another arrangement example of the vibration damping device. 13 is a front view showing another example of a structure in which a damping device is used, FIG. 14 is a plan view showing yet another example of the arrangement of the damping device, and FIG. It is a top view which shows yet another example of arrangement|positioning of a shaking device.

As shown in FIG. 1, the superhigh-rise building 1, which is a structure, has a structure 3 erected on the ground 2, and a vibration damping device 5 is installed on the top 3a of the structure 3. There is. As shown in FIG. 2, two damping devices 5 are installed at right angles to each other, and after each damping device [5 has a planar shape as shown in FIGS. It has a rectangular liquid tank 5a. Each liquid tank 5a is injected with water or a liquid 5b having a viscosity equal to or higher than that of water, and the injected liquid 5b causes the liquid tank 5a to flow as shown in FIG. The wave water surface 5f on which the liquid 5b oscillates is formed into a flat rectangular shape. Further, in the liquid tank 5a,
Mesh 5C as a damping member made of stainless steel, vinylon, high-performance fiber, etc. is installed on both left and right sides in FIG. 3 in two stages, upper and lower in FIG.

Since the superhigh-rise building 1 has the above-described configuration, when the structure 3 shakes due to an earthquake, strong wind, etc., the vibration damping device 5 installed at the top 3a also shakes. Then, as shown in FIGS. 3 and 4, the liquid 5b in the vibration damping device 5 moves in the longitudinal direction WD of the wave water surface 5f in synchronization with the vibration of the structure 3.
to sway.

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 and the liquid height L3 of the liquid 5b in a stationary state, as shown in FIGS. 3 and 4). By making the period (determined) coincide 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 vibration energy of the high-rise building 1 is absorbed by the wave motion. Absorb. 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 embodiment described the case where the mesh 5c was used as a damping member provided in the liquid tank 5a, the damping member may be any material as long as it can damp the vibration of the liquid 5b in the liquid tank 5a. The mesh 5c may be of any form or shape, and may be installed in any manner, for example, as shown in FIGS. 5 and 6, the liquid tank 5a may be divided vertically in FIG. You can install more than one. In addition to the mesh 5C, for example, as shown in FIG. 7 and FIG. 5f is divided into a plurality of parts), and a large number of protrusions 5e are provided on the partition wall 5d in a shape that matches the swinging form of the liquid 5b (that is, for example, as shown in FIG. 8, the central part is concave). Plant and
Due to viscous resistance generated between the protrusion 5e and the liquid 5b, the liquid
Of course, it is also possible to attenuate the vibration of b. 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.

Furthermore, the manner in which the damping device 5 is arranged can be selected as appropriate depending on the placement location and the required damping performance. That is, since the wave motion of the liquid 5b occurs in the longitudinal direction of each damping bag W5,
By installing the wave water surface 5f of each vibration damping device 5 in the longitudinal direction WD toward at least two directions of the building 1 where vibrations are to be absorbed, each vibration damping device 5 is provided with the shaking separated into at least two directions. It is possible to exert a large vibration damping effect. For example, as shown in FIGS. 9 and 10,
The plurality of damping devices 5 are oriented in two horizontal directions in which the longitudinal direction WD, which is the wave formation direction of the wave water surface 5f, is orthogonal to each other (
It is also possible to arrange it as follows. By doing so, it becomes possible to effectively absorb the shaking that occurs in the building 1 in two directions at right angles. Furthermore, as an installation mode of the vibration damping devices 5, as shown in FIGS. 11 and 14, it is also possible to arrange a large number of vibration damping devices 5 along the outer wall 1a of the building 1. In the case of Fig. 14, it is also placed in the center of building 1.) In such a case, the top 3a of building 1
Even if there is existing equipment such as an elevator machine room,
It becomes possible to install the vibration damping device 5 without using such existing equipment, and furthermore, it becomes possible to effectively utilize the building space. Further, in the case of a building 1 having a circular planar shape, a large number of vibration damping devices 5 may be arranged along the circular outer wall 1a, as shown in FIG. Furthermore, the 15th
As shown in the figure, it is of course possible to arrange the damping devices 5 radially. Further, by arranging the vibration damping device 5 along the outer wall 1a of the building 1 where the amplitude becomes large, it is possible to significantly enhance the vibration damping effect.

Furthermore, as structures to which the vibration damping 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 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 5a 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 vibration damping effect), and the damping effect by the damping member. A vibration damping effect can be achieved when the constant is about 2 to 10%.

(g) 0 Effects of the Invention As described above, according to the present invention, the vibration damping device 5 has a flat wave water surface 5f formed with a longitudinal direction WD in the wave direction. liquid tank 5a
The liquid tank 5a is provided with damping members such as a mesh 5c, a partition wall 5d1 and a protrusion 5e for damping the vibration of the liquid, and a plurality of vibration damping devices 5 are installed in the liquid tank 5a of each vibration damping bag W5. Since the longitudinal direction WD is installed so as to face at least two horizontal directions of the structure, the super high-rise building 1 and the tower 6
It becomes possible to effectively absorb vibrations caused by wind or earthquakes of IVt 'IZr objects such as the above by swinging the liquid 5b in each vibration damping device 5. In addition, since the structure does not include mechanically moving parts such as the liquid tank 5a and the liquid 5b, it has reliability over time compared to mechanical vibration damping mechanisms, 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 damping structure according to the present invention is used, Fig. 2 is a perspective view showing an example of the arrangement of the damping device, and Fig. 3 is a diagram showing an example of the arrangement of the damping device. 4 is a front sectional view of the damping device shown in FIG. 3, FIG. 5 is a plan view showing another embodiment of the damping device, and FIG. 6 is a top view of the damping device shown in FIG. 5. A front sectional view of the vibration device, FIG. 7 is a plan view showing yet another embodiment of the vibration allocation device, FIG. 8 is a front sectional view of the vibration damping device of FIG. 7, and FIG. 9 is another arrangement of the vibration damping device. A perspective view showing an example; FIG. 10 is a plan view of FIG. 9; FIG. 11 is a plan view showing yet another arrangement of the damping device; FIG. 12 shows yet another arrangement of the damping device. A plan view, FIG. 13 is a front view showing another example of a structure in which the vibration damping device is used, FIG. 14 is a plan view showing yet another example of the arrangement of the vibration damping device, and FIG. FIG. 7 is a plan view showing another example of arrangement. 1... Structure (high-rise building) 5... Vibration damping device 5a... Liquid tank 5b... Liquid 5C... Damping member (mesh) 5d... Damping member (partition wall) 5e... Damping member (protrusion) 5f... Wave water surface 6... Structure (tower) WD... ...Longitudinal Applicant Mitsui Construction Co., Ltd. Agent Patent Attorney Phase 1) Shinji (and 2 others) Figure 13 Figure 1 Figure 2 Figure 5 Figure 3 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 □ Figure 12 D (April 15, 1988 Director General of the Patent Office Kunio Ogawa Tsukuri 2-A 1, Indication of the case 1988 Patent Application No. 305379 2, Title of the invention: Vibration damping structure for structures 3. Relationship with the case of the person making the amendment Patent applicant address: 3-10-1 Iwamoto-cho, Chiyoda-ku, Tokyo Name: Mitsui Construction Co., Ltd. Representative: Ryoji Machida 4, Agent address: 101 Iwamoto, Chiyoda-ku, Tokyo Insert the following sentence between the 9th line and 10th line (blank line) in the "Detailed Description of the Invention" column of the specification of No. 1-9-6 Town, page 10 of the specification of the present application. . ``In addition, the vibration damping device used in the present invention is suitable for use in new buildings with side openings,
Of course, it can be installed regardless of the existing structure. "that's all

Claims (1)

[Claims] A vibration damping device installed on the top of a structure to absorb the vibrations of the structure, wherein the vibration damping device has a flat wave water surface formed with a longitudinal direction in the wave direction. , a liquid tank injected with liquid, a damping member for damping vibration of the liquid in the liquid tank, a plurality of vibration damping devices, and at least one longitudinal direction of the liquid tank of each vibration damping device. A vibration damping structure for a structure installed in two horizontal directions of the structure.