JP4092864B2 - Input direction tracking type vibration control device for structures - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to an input direction tracking type vibration damping device for a structure.
[0002]
[Prior art]
Conventionally, when using a damper with directionality in vibration damping performance, such as an oil damper or a steel damper that easily bends and deforms in only one direction, the structure is to be a vibration-damping structure or a base-isolated structure. In order to deal with vibrations in any direction, it is common to place the dampers installed on the structure in two groups and be arranged in two orthogonal directions. Since it cannot function as effectively as possible, the number of dampers necessary to secure the required vibration effect has inevitably increased.
[0003]
[Problems to be solved by the invention]
The problem to be solved by the present invention (object of the present invention) is that, in view of the problems of the prior art, a damper having directionality in damping performance always functions to the maximum extent regardless of the vibration direction. By using this, the number of dampers used for the entire structure is reduced compared to the conventional structure, and a structure-based input direction tracking type vibration damping device that increases the degree of design freedom of the structure is provided. There is to do.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the input direction tracking type vibration damping device for a structure of the present invention (hereinafter simply referred to as the device of the present invention), the direction in which the vibration damping performance is exhibited to the maximum and the direction orthogonal thereto The damper with the difference in rigidity and the direction of braking performance is arranged so that the direction in which the braking performance of the damper is maximized is horizontal, and the upper part of the damper can be rotated horizontally on the structure The lower part of the damper is attached only to the structure so as to be horizontally rotatable, and the damper is attached to the structure only at the upper and lower parts thereof so as to be horizontally rotatable. Using the difference in rigidity between the direction in which the vibration performance is maximized and the direction perpendicular to it, it automatically rotates horizontally due to vibration in an arbitrary direction during an earthquake, and controls the damper. The direction in which the performance is maximized, and to direct the vibration direction at the time of the earthquake.
[0005]
In the present invention, a damper having directionality in the damping performance has a large difference in rigidity between the direction in which the damping performance is maximized and the direction orthogonal thereto, which is the maximum braking performance in the damper. If it is placed so that the direction where it can be exerted horizontally is horizontal and mounted on the structure so that it can rotate horizontally , the difference in rigidity between the direction in which the damping performance of the damper is maximized and the direction perpendicular thereto , Automatically rotate horizontally by vibration in any direction during an earthquake, and the direction with the least rigidity, that is, the direction in which the damping performance is maximized, matches the vibration direction during an earthquake It is based on the knowledge that it becomes.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, 1 is a beam, 2 is a floor, 3 is a column, and an upper damping damping column 4 is provided between adjacent columns 3 and 3. A lower damping damping column 4 'is provided, and a damper 5 having directionality in damping performance is installed between the upper damping damping column 4 and the lower damping damping column 4'. The damper 5 is installed so that the direction in which the braking performance of the damper 5 is maximized is horizontal.
[0007]
The damper 5 shown in the figure is formed by rigidly joining seat plates 7 and 7 'orthogonally to the upper and lower ends of an upright steel plate 6, and the steel plate 6 is bent and deformed as shown in FIG. Energy is absorbed, and the seat plates 7 and 7 'are for installation.
[0008]
In FIG. 3 which shows an example of the installation mode of the damper 5, 8 and 8 ′ are circular projecting portions projecting downward and upward at the lower end of the upper vibration damping column 4 and the upper end of the lower vibration damping column 4 ′, respectively. A donut-shaped upper mounting base 9 and a lower mounting base 9 'are respectively inserted into these protrusions 8 and 8' so as to be horizontally rotatable.
[0009]
The height of the protrusion 8 is equal to the thickness of the upper mounting base 9, and the height of the protrusion 8 ′ is equal to the thickness of the lower mounting base 9 ′. When the damper 5 is installed, the upper mounting base 9 is pushed upward. When temporarily fixed to the upper vibration damping column 4, the lower surfaces of the upper mounting base 9 and the upper projecting portion 8 are flush with each other, and the lower mounting base 9 'is made of an anti-friction mechanism comprising a ball bearing or the like as shown. When supported by the lower vibration damping column 4 ′ via 10, the upper surface of the lower mounting base 9 ′ is higher than the upper surface of the lower protrusion 8 ′.
[0010]
In this state, the damper 5 is placed on the lower mounting base 9 ′, the lower seat plate 7 ′ of the damper 5 is joined to the lower mounting base 9 ′, and the temporary fixing to the upper damping pillar 4 is released. When the upper mounting base 9 is joined to the upper seat plate 7 of the damper 5, a gap 11 is formed between the lower protruding portion 8 ′ and the lower seat plate 7 ′. 9 and a gap 12 as shown in the figure between the upper projecting portion 8 and the upper seat plate 7, and an input direction following type that can smoothly rotate horizontally without bearing the axial force from the frame. The vibration damping device is configured.
[Brief description of the drawings]
FIG. 1 is an example of an installation mode of an apparatus of the present invention.
FIG. 2 is a state diagram at the time of the earthquake of FIG. 1;
FIG. 3 is a detailed view of a main part of FIG. 1;
[Explanation of symbols]
1: beam, 2: floor, 3: column, 4: upper damping column, 4 ': lower damping column, 5: damper, 6: steel plate, 7: seat plate, 7': seat plate, 8: protrusion Part, 8 ': protrusion, 9: upper mounting base, 9': lower mounting base, 10: anti-friction mechanism, 11: gap, 12: gap.

Claims (1)

There is a difference in rigidity between the direction in which the damping performance is maximized and the direction orthogonal to this direction, and the damper that has the direction of braking performance is horizontal. so as to place, attached only to freely horizontally rotating the top of the damper to the structure, is attached only to the free horizontal rotation to the structure of the lower part of the damper, thus the damper, the structure at its upper and lower By installing the damper only horizontally, the damper uses the difference in rigidity between the direction in which the damping performance of the damper is maximized and the direction perpendicular to the direction, and the vibration is generated in any direction during an earthquake. It automatically rotates horizontally, and the direction that maximizes the braking performance of the damper is directed to the direction of vibration during an earthquake. Type vibration control device.

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