JPH06146652A - Vibration control device for building - Google Patents

Abstract

PURPOSE:To restrain swinging of an easily swinging narrow and high building, so-called pencil type building or the like. CONSTITUTION:Guide rails 5 are laid approximately horizontally on a building frame 4, and a mass block 8 is supported with wheels 6 to travel on the guide rails 5. A viscous body damper composed of a tub shape container 16 housing high viscous liquid 15 is arranged in the upper surface part of the mass block 8. A resistance plate 19 fixed to an element 17 on the building frame 4 side is arranged approximately in parallel at a prescribed interval between it and the bottom surface in the tub shape container 16 of the viscous body damper. One end part is fixed to the building frame 4 side, and a restoring spring 11 installed in the mass block 8 is arranged in the other end part. Thereby, since a device can be installed by using the narrow ceiling bosom 2 or the like being dead space in a building 1, installation space can be secured quite easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passive type vibration damping device which is used for the purpose of suppressing sway in thin and tall pencil type buildings and other swayable buildings as much as possible. Regarding

[0002]

2. Description of the Related Art Conventionally, as a passive type vibration damping device for suppressing the shaking of a building due to an earthquake or wind load, for example, Japanese Patent Publication No.
A vibration damping device based on the principle of applying a pendulum described in Japanese Patent No. 29554 or a vibration damping device based on the principle of moving a mass block by a mechanism combining a roller and a rail described in Japanese Patent Publication No. 60-15960. It is well known and has been implemented.

Further, Japanese Patent Laid-Open No. 4-1374 / 1992 discloses a passive type vibration damping device having a small size and a compact structure which can be installed by utilizing a narrow ceiling of a building.

[0004]

[Problems to be Solved by the Invention] At present, land prices in Japan, especially in urban areas, have risen abnormally, and due to a chronic land shortage, a pencil-type building as tall as possible on a narrow land has been constructed. Building is becoming commonplace, and the number of such pencil-type buildings is on the rise. However, since the pencil type building is easily shaken by an earthquake or wind load, the importance of the vibration damping device is increasing in order to enhance the habitability and safety of the building.

The building vibration damping device is roughly classified into an active type (active type) and a passive type (passive type). In either case, the conventional vibration damping device is high in size and large in size. Since it occupies a place, it is difficult to secure a space for installing such a vibration control device inside the building. That is, because the land price is high and the construction cost is high, the building owner wants to improve the economic effect of the building, so there is not enough space available, and even if it is necessary, a vibration damping device is installed. The current situation is that there is no place to do it.

Next, the vibration damping device disclosed in the above-mentioned Japanese Patent Laid-Open No. 4-1374 has a small and compact structure in consideration of application to a pencil type building. However, the moving support portion that movably supports the mass block with low friction has a structure in which the rolling of a large number of balls is applied, and this is otherwise expensive. In addition, since the moving bearing has no specific direction for moving the mass block, and thus allows the mass block to be restored in all directions of horizontal 360 °, many spring mechanisms are frequently used at least in four directions at right angles. However, there is a drawback that the installation work is troublesome. Furthermore, the planar shape of a building is usually a flat rectangle, and it is easy to swing in the direction of its short sides, but it is normal for it to hardly swing in the direction of its long sides. Therefore, there is also an idea that it is easier to use the vibration damping device having a specific direction.

Therefore, an object of the present invention is to provide a vibration damping device for a building improved to a structure that can be installed conveniently by effectively utilizing what is called a dead space inside the building, which is a so-called dead space. is there.

[0008]

As a means for solving the above-mentioned problems of the prior art, a building vibration damping device according to the present invention is provided with a guide rail 5 on a building frame 4 as shown in an embodiment in the drawings. Are laid substantially horizontally, and the mass block 8 is movably supported by the wheels 6 traveling on the guide rail 5 with low friction. On the upper surface of the mass block 8, a viscous damper composed of a trough-shaped container 16 containing a highly viscous liquid 15 is installed with the container 16 fixed. A resistance plate 19 fixed to the element 17 on the side of the building body 4 provided above the viscous damper is installed substantially in parallel with the bottom surface of the trough-shaped container 16 of the viscous damper with a predetermined gap. ing. In addition, one end is the building frame 4
A restoring spring 11 fixed to the side and attached to the mass block 8 is installed at the other end.

[0009]

When the building 1 is the main vibration system and the mass block 8 is the additional mass, when the building 1 which is the main vibration system is in a resonance state due to an external force such as an earthquake or wind, the mass block of the additional mass is generated. 8 is also in a resonance state, and the vibration force of the mass block 8 acts in a direction of canceling the vibration of the building 1, which is the main vibration system, and as a result, the vibration of the building 1 is suppressed and mitigated.

When the additional mass 8 is not attached to the building 1, the maximum response magnification occurs in the primary cycle of the building 1 (FIGS. 5 to 7).
See the ◯ mark). Even if the building 1 is provided with the additional mass 8, if the damping of the additional mass 8 portion (the damping action of the viscous damper in the case of the present invention) is small, the response magnification is reduced but the damping effect is still obtained. Is low (see the difference between the Δ and □ marks in FIGS. 5 to 7). Therefore, if an additional mass (mass block 8) is added and the damping amount is adjusted appropriately with a viscous damper, the response magnification is sufficiently reduced and averaged, and a stable vibration damping effect can be obtained. That is, the damper of the additional mass 8 (viscous damper) is arranged so that the cycle of the main vibration system (building 1) and the cycle of the vibration system of the additional mass (mass block 8) match and resonate.
Proper damping effect can be obtained by adjusting the damping amount of.

[0011]

EXAMPLE An example of the present invention shown in the drawings will be described below.
FIGS. 1A and 1B show a ceiling part 2 on an arbitrary floor, which is a relatively high floor of a building 1 called a thin and tall pencil type building.
The general condition in which the vibration damping device 3 of the present invention is installed is shown in FIG. 2 to 4 show details of the structure of the vibration damping device 3. Floor (or ceiling) structure of building 1 6 on the horizontal plane of structure 4
Two guide rails 5, 5 consisting of steel rods with a square cross section of about 6 mm are laid horizontally in parallel with a length of about 70 cm, and both flanges that ride on the guide rail 5 and run along the guide rail 5 A plurality of mold wheels 6 are installed in the front-rear direction at intervals of about 40 cm. Further, a flat plate-shaped mass block in which two guide rails 7, 7 which are fitted in the rail groove portion of the wheel 6 and are constrained by the rail groove portion of the wheel 6 along with the rolling of the wheel 6 are attached in parallel to the lower surface. A (weight) 8 is installed so that the guide rail 7 is placed on the rail groove portion of the wheel 6, and is configured to be horizontally movable with low friction. In this case, the moving stroke of the wheel 6 is 1 / the moving stroke of the mass block 8.
2 is reasonable. The mass block 8 of this embodiment is a steel plate having a thickness of 9 mm, a width of 170 mm, and a length of about 600 mm.

A thickness 19 is provided on each end of the mass block 8.
A horizontal member 9 made of a steel plate having a size of 50 mm, a width of 50 mm, and a length of 300 mm is integrally attached, and is laid between the horizontal members 9, 9 in parallel at positions on both sides of the mass block 2. Guide bars 10 and 10 are provided for each book. A coil spring 11 for tensioning is wound around the central portion of each guide bar 10, and one end of the coil spring 11 is attached to a bar side spring receiver 12 fixed to the guide bar 10 as shown in a partially broken view in FIG. It is fastened. The other end of the coil spring 11 has a frame-side spring receiver 14 fixed to the floor structure frame 4 of the building.
Is fixed to a floating spring receiver 13 that abuts on one side of the. The frame-side spring receiver 14 is configured as a cylindrical guide sleeve that guides the free passage movement of the coil spring 11. The floating spring receiver 13 is a guide bar 1
0 is free. Further, the positions of the bar side spring receiver 12 and the floating spring receiver 13 are diametrically opposite to each other in the two guide bars 10 and 10. In short, when the mass block 8 and the guide bar 10 which is a structural element integral with the mass block 8 move to the right in FIG. 2, the coil spring 11 having the bar side spring receiver 12 on the right side has the floating spring receiver 13 at the left end on the body side. From the time of hitting the spring receiver 14, the coil spring 11 is stretched by pulling and expanding with the rightward movement of the guide bar 10, and this spring force acts as a restoring force. On the contrary, the coil spring 11 having the floating spring receiver 13 on the right side simply moves along with the movement of the guide bar 10 through the body-side spring receiver 13. This point acts with exactly the same symmetry when the mass block 8 moves to the left in FIG.

Next, as is apparent from FIG. 4, a relatively shallow mass block 8 containing a viscous liquid 15 such as a polymer viscous substance such as silicon in the approximate center of the upper surface of the mass block 8 is shown. Vat-shaped container 16 elongated in the direction of movement
The viscous damper configured as described above is installed by fixing the trough-shaped container 16 to the upper surface of the mass block 8 upward. On the other hand, the cover 17 covering the viscous damper above
Is fixed to the floor structure body 4 of the building with anchor bolts 18, and thus the cover 17 is an element on the side of the building body. A horizontal resistance plate 19, which is one of the constituent elements of the viscous damper, is a support member 2 fixed to the lower surface of the cover 17.
The resistance plate 19 is fixed to 0, so that the resistance plate 19 is immersed in the viscous liquid 15 of the trough-shaped container 16 and keeps a distance of several mm to several tens of mm from the bottom surface of the trough-shaped container 16. .

Therefore, when the building 1 shakes due to wind load or earthquake input and relative displacement occurs between the building frame 4 and the cover 17 and the mass block 8, the resistance plate 19 and the bottom of the trough-shaped container 16 are separated. The viscous resistance resulting from the viscosity of the viscous liquid 15 acts, and this acts as an action of damping the vibration energy. This vibration damping device is implemented with a compact structure in which the height of the back from the upper surface of the floor structure body 4 of the building 1 to the top end of the cover 17 is as low as about 80 to 100 mm.

By the way, FIGS. 5 to 7 show the results of simulation analysis in which the above-described vibration damping device is implemented. The circles in the figure are for the case where the vibration damping device is not installed, and the triangles are for the ratio of the weight of the mass block 8 of the vibration damping device to the building weight is 1 /.
In the case of 1000, the mark □ is the result of execution under the condition that the ratio is 1/100. The mass point period is equal to the primary period of the building, and the equivalent damping of the additional mass point (mass block 8) is 30.
% Was carried out.

According to FIGS. 5 to 7, the deformation angle and the layer deformation between the acceleration layers of the triangle marks and the square marks on which the vibration damping device is installed are considerably smaller than those of the circle marks. The reduced damping effect can be seen. Further, comparing the Δ mark and the □ mark, it is clear that the larger the mass of the mass block 8 is, the greater the damping effect is.

[0017]

The vibration damping device for a building according to the present invention can be installed in the building 1 by utilizing the narrow ceiling space 2 which is a dead space, so that it is extremely easy to secure the installation space. . Therefore, it is possible to economically enhance the habitability and safety of the building without consuming the effective space of the building 1 that is prone to sway such as a pencil-type building for installing the vibration damping device. Therefore, it is possible to provide an effective countermeasure against the problem of the earthquake of the pencil type building which is increasing more and more in the future and the problem of the shaking due to the wind load.

The vibration damping device of the present invention is small and compact in structure, and can be used at a low cost, so that the economical effect is great also in this sense. Besides, the structure and uses of the building 1,
A wide variety and versatility that can be implemented in any way depending on the size and shape of the installation space,
It is highly versatile and extremely practical.

[Brief description of drawings]

1A and 1B are a side view and a front view of a building in which a vibration damping device of the present invention is installed.

FIG. 2 is a plan view of the vibration damping device with a cover removed.

FIG. 3 is a front view in which a cover of the vibration damping device is cut away.

4 is a cross-sectional view taken along the line 4-4 of FIG.

FIG. 5 is a graph showing a characteristic relating to acceleration of the vibration damping device.

FIG. 6 is a graph showing characteristics regarding a deformation angle between layers of the vibration damping device.

FIG. 7 is a graph showing characteristics relating to the magnitude of deformation between layers of the vibration damping device.

[Explanation of symbols]

 1 Building 4 Body 5 Guide Rail 6 Wheel 8 Mass Block 15 Highly Viscous Liquid 16 Vessel Container 17 Cover 19 Resistance Plate 11 Coil Spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideyuki Watanabe Inventor Hideyuki Watanabe 21-1-1 Ginza, Chuo-ku, Tokyo Takenaka Corporation Tokyo Main Store (72) Inventor Kohei Kishimoto 8-21 Ginza, Chuo-ku, Tokyo No. 1 Incorporated Takenaka Corporation Tokyo Main Store (72) Inventor Masahiro Mori 8-21-1, Ginza, Chuo-ku, Tokyo Incorporated Takenaka Corporation Tokyo Main Store (72) Inventor Yasuaki Hirakawa Ginza, Chuo-ku, Tokyo 8-21-1 Takenaka Corporation Tokyo Main Store (72) Inventor Hideyuki Ito 8-21-1 Ginza, Chuo-ku, Tokyo Takenaka Corporation Tokyo Head Office

Claims (1)

[Claims] 1. A guide rail is laid substantially horizontally on a building frame, and a mass block is movably supported by wheels running on the guide rail with low friction, and a high-viscosity material is provided on an upper surface of the mass block. A viscous damper composed of a trough-shaped container containing a liquid is installed by fixing the trough-shaped container, and a resistance plate fixed to an element on the building skeleton side provided above the viscous damper is the viscous body. It is installed in parallel with the bottom of the trough-shaped container of the damper with a certain distance, and a spring for restoration with one end fixed to the building frame side and the other end attached to the mass block is installed. Vibration control device for buildings, which is characterized by being