JPH086489B2 - Vibration control device for buildings - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vibration damping device for a building, which prevents a building from vibrating significantly due to an earthquake or a strong wind.

[Prior Art] Conventionally, as a vibration damping device of this type, for example, there is a proposal disclosed in JP-A-63-114774. This publication describes that the conventional vibration damping device provided in the Chiba Port Tower is mechanically constructed and the structure is complicated and expensive. Therefore, a mass member arranged at the upper part is supported by a laminated rubber, and a helical spring is used to adjust the elastic restoring force.
However, it is desirable that the vibration damping device can vibrate with a large amplitude such as about 1 m, but the one supported by laminated rubber becomes unstable when the amplitude increases, and the weight of the mass member increases when the amplitude decreases. There is a need.

[Problems to be Solved by the Invention] This invention has a simple structure and can be constructed at low cost.
In addition, the present invention provides a building vibration damping device in which the weight of a mass member can be made relatively small and stable vibration can be achieved even when vibrating with a large amplitude.

[Means for Solving the Problem] The present invention is to move at least one horizontally movable mass member by connecting both ends to the mass member and a building, respectively. A rubber member made of a material that has a rubber elasticity as a whole and that has a portion that extends in a direction perpendicular to the direction and that can give a restoring force by shearing when the mass member moves. The present invention provides a vibration damping device for a building, which has a portion supported by the building without a rubber member.

The present invention is such an apparatus, wherein the rubber member extends in the vertical direction, and the mass member is supported by a rolling member so as to be movable in all horizontal directions. Is provided.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

In one embodiment of the present invention shown in FIGS. 1 and 2,
Reference numeral 10 indicates a vibration damping device as a whole. Reference numeral 11 denotes a support member, such as four, fixed to a floor 12 of the building, and a plurality of rolling members 13 made of steel balls that can roll in all directions are provided on the upper surface of each support member. Reference numeral 15 is a mass member, which is provided with a flange 16 at the bottom and is supported on each support member 11.
As the mass member 15, for example, a portion having a necessary mass of a building such as an aquarium may be used. Reference numeral 17 denotes a fixing device such as four, each having a column 18 fixed to the floor 12 by means not shown and a mounting portion 19 fixed to the upper end of this column. 20 is a flange 16 of each mounting portion 19 and the mass member 15.
Each end is connected to the
Reference numeral 15 is a rubber member made of a substance having rubber-like elasticity so as to be deformed by shearing when it moves in the horizontal direction to give an elastic restoring force. As this rubber member, various rubbers such as natural rubber, synthetic rubber or rubber with cloth, laminated rubber, laminated rubber with high damping can be used. Reference numeral 25 denotes a damping device provided as necessary, and a highly viscous fluid 27 is contained in a container 26 fixed to the floor 12, and a movable plate 28 fixed to the bottom surface of the mass member 15 comes into contact therewith. The natural frequency of the mass member 15 is substantially equal to the first-order natural frequency of the building.

In the configuration described above, when the building shakes due to an earthquake or strong wind, the mass member 15 largely swings in the opposite direction, and the building is prevented from swinging.

3 and 4 show another embodiment of the present invention. In the fixing device 17, the upper ends of the columns 18 are integrally connected by a connecting member 30. Further, as a support member 11 for supporting the mass member 15, a floor 12 mounted on the mass member so as to be rollable in all directions.
What has a rolling member 13 composed of free wheels capable of traveling above is used. If necessary, the rolling member 13 may have a peripheral surface made of rubber to reduce the generation of sound. As the mass member 15, a desired number of metal blocks 33 are combined and configured.

Another embodiment of the present invention shown in FIG. 5 is that the fixing device 17 is not provided with the pillars 18, and the bolts 36 are removed from the wall 35 of the building.
And a metal member 38 to which the upper end of the rubber member 20 is fixed is fixed by the bolt and nut 37.

In another embodiment of the present invention shown in FIG.
A mass member 15 is supported by a support member 11 attached to the upper end of the mass member, and the mass member extends downward at the central portion. The rubber member 20 is attached horizontally at the lower end of the column 18.
It is mounted between 40 and the flange 16 of the mass member 15.

In another embodiment of the present invention shown in FIG. 7, another vibration damping device as shown in FIG. 1 is mounted on the mass member 15 of the vibration damping device 10 having substantially the same construction as that shown in FIG. Device 10a
The support member 11a fixed on the mass member 15 is provided with
Supports the mass member 15a, the fixing device 17a having the support 18a and the mounting portion 19a is fixed on the mass member 15, and the rubber member 20a is provided between the mounting portion 19a and the mass member 15a. . 25a is a damping device. In this embodiment, the primary and secondary natural frequencies are made substantially equal to the primary and secondary natural frequencies of the building to obtain a damping effect on the primary vibration of the building and a damping effect on the secondary vibration. Is becoming available.

A vibration damping device 10 according to another embodiment of the present invention shown in FIGS. 8 and 9 can be installed in a place having a narrow width between double wall surfaces. It is something to do. In this figure, a fixing member 17 fixed on the floor 12 has a bottom member 41 formed in a groove shape, and the whole is formed in a frame shape. The mass member 15 is provided with two rolling members 13 and is adapted to roll along the bottom member 41. The other parts are constructed in substantially the same manner as the other embodiments, and the corresponding parts are designated by the same reference numerals.

A vibration damping device 10 according to another embodiment of the present invention shown in FIGS. 10 and 11 is suitable for being installed in a low-height portion between portions having a double floor board. Horizontally extending rubber members 20 are provided between both sides of the mass member 15 and the fixing member 17, and the mass member 15 can move only in the arrow direction.

Various modifications can be made in the present invention.
For example, the mass member 15 and the like may be directly supported without using the rolling member 13. In such a case or when using the rubber member 20 made of a high damping laminated rubber, the damping device 25 may not be provided in particular.

[Advantages of the Invention] In the present invention, since the mass member 15 has a portion supported by the building without the rubber member 20 interposed therebetween, the rubber member 20 having a sufficient length can be used, and the mass member 15 is stable. This has the effects of vibrating well and easily constructing a large-amplitude vibration damping device, and the weight of the mass member is relatively small, and the corner structure is simple and inexpensive.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention partially removed or cut away, FIG. 2 is a plan view taken along the line AA in FIG. 1, and FIG. FIG. 4 is a front view showing another embodiment partially removed or cut away to show a third embodiment.
FIG. 5 is a front view showing a part of another embodiment of the present invention which is different from each other, and FIG. 7 is another embodiment of the present invention. FIG. 8 is a front view showing a partial cutaway view of another embodiment of the present invention, FIG. 9 is a sectional view taken along the line CC of FIG. 9, and FIG. 10 is another embodiment of the present invention. The plan view shown in FIG. 11 is a side view thereof. 10 ... Vibration control device, 11 ... Support member, 12 ... Floor, 13 ... Rolling member, 15 ... Mass member, 17 ... Fixing device, 20 ... Rubber member, 25 ... Damping device.

Claims (2)

[Claims] 1. A mass member movably supported in at least one horizontal direction, and both ends of the mass member and the building are connected to each other to extend in a direction perpendicular to the moving direction of the mass member. When a cage mass member moves, it includes a rubber member made of a material that has a rubber elasticity as a whole that can be sheared to give a restoring force, and the weight of the mass member is constructed without the intervention of the rubber member. A vibration control device for buildings, characterized by the fact that there is a part that supports the object. 2. The apparatus according to claim 1, wherein the rubber member extends in the vertical direction, and the mass member is supported by a rolling member so as to be movable in all horizontal directions. Characterized device.