JP2527372B2 - Building damping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a vibration damping device that reduces shaking of a building due to an earthquake, wind, or the like.

(Prior Art) Due to the difference in horizontal rigidity between a frame and a wall of a building, the deformation when a horizontal force is applied during an earthquake or the like is different.

As a vibration damping device utilizing relative deformation of a frame and a wall at this time, conventionally, as shown in FIG. 6, a hollow PC wall (a) fixed to a floor is filled with a viscous body (b), Insert the plate (d), whose upper end is fixed to the beam (C), into the viscous body (b) so that the gap between the inner wall surface of the PC wall and the plate is filled with the viscous body to prevent earthquakes, winds, etc. When horizontal force is applied, the relative deformation between the plate and the PC wall causes
A vibration damping device using a viscous body has been proposed in which the plate moves in the viscous body so as to absorb vibration energy and reduce shaking.

 In the figure, (e) is a pillar.

Further, as shown in FIG. 8, a steel material (h) having an easily deformable portion is interposed between the beam (f) and the wall (g) and fixed under the beam and on the wall to prevent an earthquake, When a horizontal force such as wind acts to deform the skeleton, the steel material having the easily deformable portion yields with a small horizontal force, and when the horizontal force is further applied, the steel material undergoes plastic deformation, A vibration control device that absorbs vibration energy by a drawn history curve (see Fig. 10) to reduce building vibration has been proposed.

(Problems to be Solved by the Invention) In the vibration damping device using the former viscous body, the magnitude of viscous resistance generated in the viscous body increases as the gap between the plate and the inner wall surface decreases, and Since the larger the surface area immersed is, the larger the surface area needs to be for the plate in order to improve the vibration damping performance. When only one plate is used, the entire wall must be a vibration damping device. Therefore, when it is attempted to manufacture this vibration damping device, the size is not uniform depending on the building, and it takes time and effort to manufacture the vibration damping device.

In the latter case, the hysteresis damper utilizing the plastic deformation of the steel material is likely to be damaged by a large earthquake, and the metal may be fatigued due to repeated deformation, resulting in deterioration in performance. In addition, because the steel material is in the elastic range against small amplitude fluctuations due to wind, etc.,
The vibration energy cannot be absorbed and the vibration damping effect is not exerted.

The present invention has been proposed in view of the problems of the above-described prior art, and its object is to easily manufacture the device and reduce the size of the device without causing fatigue unlike the conventional hysteresis damper. The purpose of the present invention is to provide a building vibration damping device that can reduce the shaking even with small amplitude shaking.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the vibration damping device for a building according to the present invention has a plurality of vertical plates on the PC wall or the beam at opposite ends of the beam. A container filled with a viscous material is erected at a certain interval, and the gap between the vertical plates in the container and the inside of the container from the beam or PC wall facing the container. A number of vertical plates that are inserted into the space between the walls are hung vertically, and a spacer consisting of a sliding material or a bearing is interposed between the adjacent upper vertical plate, the lower vertical plate and the inner wall surface of the container. Has been done.

(Operation) Since the present invention is configured as described above, when the building is deformed in the horizontal direction due to an earthquake or wind, relative deformation occurs between the PC wall and the beam, and a large number of the viscous body containers are formed. The vertical plate moves in the viscous body, so that it is possible to efficiently absorb the vibration energy and reduce the shaking of the building.

At this time, by installing a plurality of the vertical plates,
The out-of-plane steel becomes smaller, the vertical plates bend and the gaps between the vertical plates become non-uniform, or they come into contact with each other, so that the water reducing effect due to the resistance of the viscous body passing around the vertical plates is reduced. However, in the present invention, a spacer made of a sliding material or a bearing is provided between the upper and lower vertical plates adjacent to each other and the inner surface of the containing wall to keep the gap between the vertical plates constant, and The relative movement of the vertical plate in the vertical direction is made possible, and the above-mentioned reduction of the damping effect can be prevented.

(Examples) The present invention will be described below with reference to illustrated examples.

1 and 2, (1) is a steel column, (2) is a steel beam, and a PC wall (3) having sufficiently high rigidity with respect to the beam is provided in the frame constituted by the beam. Placed on the same PC
Lower end of wall (3) through bolt (4) to lower beam (2)
Stick to

A damping device, which will be described later, is interposed between the upper end of the PC wall (3) and the beam below the upper beam (2), and the PC wall (3)
A gap t is provided between the column and the column.

The upper end surface of the PC wall (3) is filled with a viscous body (5), and a plurality of lower vertical plates (6) are erected, and the spaces between the vertical plates (6) and between the vertical plates (6). ) And the inner wall surface of the container, the container (7) has a bolt (8).
Is fixed through. In the figure, (9) is the container (7)
Is a bolt hole provided in the projecting portion of the bottom piece (7a). (See Fig. 4) On the other hand, a number of upper vertical plates (1
0) is inserted into the gap between the lower vertical plates (6) in the container (7) and the gap between the vertical plates (6) and the inner wall surface of the container, and the upper vertical plate (10) and the lower vertical plate (10) are inserted. A gap is provided between the plate (6) and the inner wall surface of the container (7). Further, gaps t ', t "are also provided between both sides and the lower end of the upper vertical plate (10) and both inner wall surfaces and the lower bottom surface of the container (7).

Further, a spacer (11) made of a sliding material or a bearing for maintaining a gap is interposed between the upper vertical plate (10) and the inner wall surfaces of the lower vertical plate (6) and the container (7). .

In the illustrated embodiment, the upper ends of a number of upper vertical plates (10) are fixed to a fixing plate (12), and the fixing plate (12) is attached to the lower surface of the upper beam (2) via bolts (14). It is fixed. In the figure, (13) is a bolt hole provided in the fixing plate (12).

Further, (15) is a rubber provided on the lower vertical plate (6), which is pressed against the fixing plate (12) to prevent the viscous body (5) from overflowing.

Since the illustrated embodiment is configured as described above,
When the building is deformed in the horizontal direction due to an earthquake or wind, relative displacement occurs between the beam (2) and the PC wall (3), and a large number of vertical plates are viscous bodies (5) in the container (7). By moving inside, the vibration energy is efficiently absorbed, and the shaking of the building can be reduced.

Further, since the container (7) and the upper vertical plate (10) are fixed to the beam (2) along with the PC wall (3) via the bolts (8) and (14), respectively, they can be easily attached and detached. .

If the damping force of the vertical plate at this time is F, In addition, μ: viscosity coefficient of viscous substance v: velocity of vertical plates h: gap between vertical plates FIG. 3 shows another embodiment of the present invention, in which the PC wall (3) is an upper beam through the bolts (4). The upper vertical plate (10) is fixed to the PC wall (3), and the viscous container (7) is fixed to the lower beam (2) by bolts.

In the figure, the same parts as those in the above embodiment are designated by the same reference numerals.

(Effect of the invention) As described above, the building vibration damping device according to the present invention has a plurality of vertical plates erected at intervals on the PC wall or beam at the opposite ends of the PC wall and beam. Install a viscous container, and insert the vertical plates hanging from the beam or PC wall into the container in the space between the vertical plates in the container and the space between the vertical plate and the inner wall surface of the container. By doing so, it is possible to exert a vibration damping effect, without causing fatigue unlike the conventional metal damper, and the adjacent upper vertical plate and lower vertical plate and the inner wall surface of the wall. By interposing a spacer made of a sliding material or a bearing between the vertical plates, it is possible to maintain a constant space between the vertical plates and between the vertical plates and the inner wall surface of the container, and it is possible to perform relative movement of the vertical plates in the vertical direction. It can prevent the reduction of the damping effect. . In addition, the unit can be made into a uniform size, the manufacturing is simple, the size can be reduced, and the cost is also advantageous.

The vibration can be reduced even with a small vibration, and the vibration isolator can be easily attached to and detached from the PC wall and the beam.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a building vibration-damping device according to the present invention, FIG. 2 is an enlarged longitudinal sectional view of an essential part thereof, and FIG. 3 is a front view showing another embodiment of the present invention. 4 and 5 are perspective views of the upper vertical plate as well as the viscous container, FIGS. 6 and 7 are vertical cross-sectional views showing a conventional vibration damping device, and FIG. 6 is a view before deformation of the building. Fig. 7 shows the state, and Fig. 7 shows the state when the building is deformed. 8 and 9 are longitudinal sectional views showing another example of the conventional vibration damping device, and FIG. 8 shows a state before the deformation of the building, and FIG.
The figure shows the state of the building after deformation, and Fig. 10 is the hysteresis curve of the vibration damping device. (1) …… Pillar, (2) …… Beam, (3) …… PC wall, (5) …… Viscous body, (6) …… Lower vertical plate, (10) …… Upper vertical plate, (11 )……spacer.

Claims (1)

(57) [Claims] 1. At the opposite ends of the PC wall and the beam, a plurality of vertical plates are erected on the PC wall or the beam at intervals, and a container filled with a viscous material is mounted. ,
From the beam or PC wall facing the same container, a number of vertical plates inserted vertically into the space between the vertical plates in the same container and the space between the vertical plates and the inner wall surface of the container are vertically installed, and the adjacent upper parts A building vibration damping device, characterized in that a spacer made of a sliding material or a bearing is interposed between a vertical plate, a lower vertical plate and the inner wall surface of the container.