JPH0361744A - Damping device for structure body - Google Patents

Abstract

PURPOSE:To damp a structure body which can be stably operated for a large amplitude with a simple structure for multiple frequencies by using multiple mass members with a heavy weight movably supported in the horizontal direction and separately arranged in the direction extended perpendicularly to it and connecting rubbers between members and between members and the structure body. CONSTITUTION:The mass of mass members 13 and the elasticity of rubber members 16 are adjusted so that the whole natural frequency becomes the desired value near the natural frequency of a structure body itself. When the structure body is vibrated at the primary, secondary and third natural frequencies by an earthquake or the strong wind, mass members 13 are largely vibrated at the primary, secondary and third frequencies respectively for damping. The mass member 13 at the bottom section is vibrated most heavily for the primary vibration. Mass members 13 are supported by support sections 11, thus instability is entirely prevented even if rubber members 16 are largely deformed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an allocating device for structures that prevent high-rise buildings from vibrating greatly due to earthquakes or strong winds, and in particular, relates to an allocating device for structures that can handle multiple types of natural frequencies. It is intended to have the following characteristics.

[Prior art] Various proposals have been made for this type of device in the past, such as one in which the mass member is supported by laminated rubber, but if the mass member is significantly displaced, the laminated rubber becomes unstable. In order to prevent this, it was necessary to make the mass member multi-layered and to reduce the displacement of the laminated rubber placed between the layers.

[Problems to be Solved by the Invention] Can this invention operate stably even when a rubber member provides an elastic restoring force when a mass member is displaced? ! The present invention provides an allocation device for a structure that can obtain several types of natural frequencies.

[Means for Solving the Problems] The present invention provides a structure in which each of the weights is movably supported in at least one substantially horizontal direction with respect to the structure and is disposed at an appropriate distance in a direction extending substantially perpendicular to this direction. Provided is a structure allocation device characterized by including a plurality of large mass members and a rubber member that connects each of the mass members and between the mass member and the structure at at least one end. be.

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

In one embodiment of the present invention shown in Fig. 1.2, 10 is a highly rigid main body that is fixed to the upper part of the structure or other parts that vibrate with a relatively large amplitude, and is a substantially horizontal support with multiple stages in the vertical direction. 11, and an opening 12 is formed in the center except for the lowermost one. Reference numeral 13 denotes a plurality of heavy mass members supported movably in all horizontal directions on each support portion 11, and a plurality of spherical trochanters 15 attached to the bottom surface so as to be movable in all directions. It is. Reference numeral 16 denotes a plurality of rubber members arranged in the vertical direction between the mass members 13 and to connect the mass member 13 at the upper end to the main body 10. As this rubber member, one made of natural rubber, synthetic rubber, etc., or a laminated rubber made by alternately laminating metal plates and rubber can be used. In any case, when the mass member 13 is displaced in the horizontal direction, it provides an elastic restoring force. Two or more rubber members 16 may be used between one mass member 13.

Reference numeral 20 denotes a damping device provided for each mass member 13, in which a highly viscous fluid 22 is contained in a container 21 fixed on a support portion 11, and a movable plate 23 extending from the mass member 13 comes into contact with it. . Various types of damping device 20 other than those shown can be used. For example, hydraulic pressure or friction may be used. In addition, the damping device 20 may be constructed by using a high-damping laminated rubber as the rubber member 16.
may be omitted.

In the structure as described above, the mass of each mass member 13 and the elasticity of each rubber member 16 are adjusted so that the natural frequency of the whole becomes a desired value close to the natural frequency of the structure itself. Therefore, structures may be damaged due to earthquakes, strong winds, etc.
When vibrating at natural frequencies such as second order, second order, third order, etc., each mass member 13 vibrates greatly at natural frequencies such as first order, second order, third order, etc. and damps the vibrations. In the case of primary vibration, the mass member 13 at the bottom vibrates the most. Since each mass member 13 is supported by the support portion 11, there is no possibility of instability even if the rubber member 16 is significantly deformed.

In another embodiment of the invention shown in FIG. 3.4, the upper end mass member 13 is not connected to the main body 10, but the lower end mass member 13 is connected to the main body 10 by a rubber member 16. Further, a plurality of each rubber member 16 is used.

As described above, the mass member 13 at either end needs to be connected to the main body 10 via the rubber member 16, but the mass members 13 at both ends may be connected to the main body 10 via the rubber member 16. The mass member 13 also includes a spherical trochanter 15.
It is designed to be directly supported by the support part 11 without providing any. Therefore, the damping force is applied by frictional force and no special damping device is used.

In a further embodiment of the invention shown in FIG. 5.6, the wheels 30 are displaceable along the support 11 consisting of a rail so that each mass member 13 can move only in a common horizontal direction. It has become. The rubber member 16 successively connects the mass members 13 in the lateral direction, and connects the mass members 13 at both ends to the main body 10, respectively. An oil damper is used as the damping device 20. This embodiment can be used when damping vibrations in only one direction, and has the advantage that it can be installed even in a narrow space in the vertical direction.

Various further modifications can be made to this invention. For example, in the embodiment shown in FIG. 1.2, the lowermost support part 11 may be constructed from the structure itself, or the spherical trochanter 15 may be mounted on the support part 11 without being attached to the mass member 13. good.

[Effects of the Invention] Since the present invention is configured as described above, it is possible to control a structure that damps vibrations at multiple frequencies of a structure that has an extremely simple structure and can operate stably even with large amplitudes. This has the effect of providing a shaking device.

[Brief explanation of drawings]

Fig. 1 is a partially removed or cutaway front view of one embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line A-A, and Fig. 3 is a partially cutaway view of another embodiment of the invention. FIG. 4 is a sectional view taken along line BB, FIG. 5 is a plan view showing another embodiment of the present invention, and FIG. 6 is a sectional view taken along line C-C. 10 is a main body, 11 is a support portion, 13 is a mass member, 16 is a rubber member, and 20 is a damping device.

Claims (1)

[Claims] 1. A plurality of heavy mass members each supported movably in at least one substantially horizontal direction relative to the structure and arranged at appropriate distances in a direction extending substantially perpendicular to this direction; A vibration damping device for a structure, comprising a rubber member that connects the mass members and at least one end of the mass member and the structure.