JPH0351489A - Vibration control device of construction - Google Patents

Abstract

PURPOSE:To adapt to any sort of vibration by making regulatable the effective deformation scope of a rubber member which is deformed elastically by the movement of a mass member, and making the intrinsic vibration frequency of the mass member almost coincident to the detected vibration frequency in an earthquake or the like. CONSTITUTION:A rubber member 18 to give the restoration force by the elastic deformation following the movement of a mass member 17 which is held movable in the horizontal direction is provided, and regulation members 25 and 25 to regulate the effective deformation scope of the rubber member 18 are provided. And in the normal condition, the mass member 17 is regulated to vibrate at the highest intrinsic vibration frequency by the regulation members 25 and 25. And when an earthquake or the like takes place, a vibration detecting device 33 detects the vibration, a control device 35 drives a driving device 31 to move the regulation members 25 and 25, and the intrinsic vibration frequency of the mass member 17 is made almost coincident to the vibration frequency of the earthquake.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention prevents high-rise buildings, tower-like buildings, or buildings that are thin compared to their height from vibrating greatly due to earthquakes or strong winds. This invention relates to a vibration allocating device for such a structure, and in particular automatically adjusts the natural frequency of a vibration damping device equipped with a rubber member with rubber-like elasticity that provides a restoring force when a mass member is displaced to an optimal state. It's something.

[Prior art] A conventional device of this type is JP-A-63-171966.
As shown in the publication, a mass member is supported by an elastoplastic column, an appropriate number of annular electromagnets are provided surrounding the elastoplastic column at appropriate positions, and the vibration frequency of the structure is detected to energize a specific electromagnet. There is a proposal to vibrate at a predetermined frequency in a part above the electromagnet. However, structures have different natural frequencies in the front-back and left-right directions, and there are various natural frequencies for each, so it has not been possible to adapt to any frequency.

In Japanese Patent Application No. 63-240969, the inventor proposed a vibration damping device in which a building or the like supports the weight of a mass member connected to a rubber member without using the rubber member.

[Problems to be Solved by the Invention] The present invention provides a vibration damping device for a structure in which the natural frequency can be adapted to whatever frequency the structure vibrates. This is suitable for supporting a mass member without using a rubber member.

[Means for Solving the Problems] The present invention includes at least one mass member supported movably in a horizontal direction, and both ends of the mass member and a structure are connected to each other so that the mass member moves. A rubber member that extends in a direction substantially perpendicular to the direction, has a portion that can be elastically deformed to provide a restoring force when the mass member moves, and is made of a material that has rubber-like elasticity as a whole. an adjusting member that moves along the rubber member from one end thereof to adjust the effective deformation range of the rubber member, a driving means that moves the adjusting member, and detecting vibrations of the structure or mass member. Provided is a structure allocation device comprising: a vibration detection device; and a control device that operates a drive means by issuing a signal for adjusting the effective deformation range of the rubber member from the output of the vibration detection device. It is something to do.

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

In one embodiment of the present invention shown in FIGS. 1 to 3, reference numeral 10 denotes a main body having a base 1l fixed onto a floor 12 at a somewhat high upper end or central portion of the structure. Reference numeral 13 denotes a mounting portion formed to extend downward in the upper portion of the main body, and 15 a plurality of support portions having a large number of steel balls l6 disposed on the base portion 11 of the main body 10 and movable in all directions. It is. Reference numeral 17 denotes a heavy mass member that is movably supported in all directions on this support portion, and 18 connects both ends of this mass member and the mounting portion l3 to provide an elastic restoring force when the mass member 17 is displaced. It is a rubber member. Rubber member 1
The material 8 can be made of various materials, such as one made only of rubber, or a laminated rubber made by alternately laminating rubber and metal plates. Reference numeral 20 denotes a damping device, in which a high viscosity fluid 22 is accommodated in a container 21 provided in the main body 10, and a movable member 23 connected below the mass member 17 is disposed so as to be movable within the high viscosity fluid 22. Therefore, mass member 18
When it vibrates, it provides a damping force.

Reference numeral 25 denotes an adjustment member for adjusting the range of elastic deformation of the rubber member 18, and an annular portion 26 that expands downward surrounding the mounting portion 13 and the rubber member l8 is formed at the lower part, and an annular portion 26 is formed at the upper part. Two guide portions 27 extend upward and are connected to each other at their upper ends. The guide portion 27 movably passes through holes 28 formed on both sides of the main body IO. A rack 30 is provided on one of the guide portions 27.

Reference numeral 31 denotes a drive device consisting of an electric motor that can be rotated in forward and reverse directions and provided on the upper part of the main body 10. The driving device 31 has a built-in speed reducer and is configured to raise and lower the adjusting member 25 by means of a pinion 32 that engages with the rack 30. When the adjusting member 25 is lowered by the drive device 31 as shown by the chain line in FIG. 1, the natural frequency of the shaving member 17 decreases, and when it is raised as shown by the solid line, the natural frequency becomes lower.

A vibration detection device 33 is provided on the base ll of the main body 10 and detects vibrations of the floor 12 of the structure. 35 is a control device consisting of a computer or the like, and when the vibration detection device 33 detects vibration, it sends a signal to the drive device 31 to adjust the arrangement of the adjustment member 25 so that the mass member 17 has a natural frequency that best suits it. It looks like this.

In the configuration as described above, the adjustment member 2 is usually
5 is located at the bottom in the diagram, and is adjusted so that it vibrates at the highest natural frequency, so that when the frequency at the installation location of the structure is detected due to an earthquake, etc., the optimal natural frequency will be almost the same. The adjusting member 25 is automatically moved.

In another embodiment of the invention shown in FIGS. 4 and 5,
A torment wheel 36 is attached to the texture member l7, and the rail 3
7 in a straight line in the direction indicated by the arrow. The rubber member l8 has a rectangular cross section, and the adjustment member 25 is formed with a portion that expands only in the direction in which the mass member 17 moves. This allocation device is used to allocate in only one direction, and the damping device 20,
The vibration detection device 33, control device 35, etc. are omitted from illustration.

In the present invention, the adjustment member 25 may be provided adjacent to the mass member l7, or the vibration detection device 33 may be attached to the mass member l7 so as to detect vibrations of the mass member l7. This is because when the structure vibrates, the mass member also vibrates at approximately the same frequency as the structure. Further, the steel ball 16 may not be provided in the support portion 15 that supports the mass member 17, and various types of damping device 20 may be used. For example, a high-damping laminated rubber may be used as the rubber member 18. You can. Further, the present invention can also be applied to a conventionally known vibration damping device in which the mass member 17 is supported by a rubber member 18 made of laminated rubber. Generally, a plurality of rubber members 18 may be used, and in such a case, an adjustment member 25 may be provided for each rubber member 18, and the rubber members 18 may be controlled by a common vibration detection device 33 and a common control device 35, or by a common or respective drive device 3l. Bye.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention, FIG. 2 is a partially cutaway plan view, FIG. 3 is a perspective view of the adjustment member, and FIG. 4 5 is a partially removed or cutaway front view of another embodiment of the present invention, and FIG. 5 is a sectional view taken along line A--A in FIG. 4. 10 is a main body, 13 is a mounting portion, 15 is a support portion, 17 is a mass member, 18 is a rubber member, 25 is an adjustment member, 31 is a drive device, 33 is a vibration detection device, and 35 is a control device.

Claims (1)

[Claims] 1. A mass member supported movably in at least one horizontal direction, and a mass member extending in a direction substantially perpendicular to the direction in which the mass member moves, with both ends connected to the mass member and the structure, respectively. A rubber member that is made of a material that has rubber-like elasticity as a whole and has a portion that can elastically deform and provide a restoring force when the member moves,
an adjustment member that moves along from one end of the rubber member to adjust the effective deformation range of the rubber member; a drive means that moves the adjustment member; and vibration of the structure or mass member. A control device for a structure comprising: a vibration detection device for detecting the vibration; and a control device for operating a drive means by issuing a signal for adjusting an effective deformation range of the rubber member from the output of the vibration detection device. Shaking device.