JP2564615Y2 - Vibration suppression device for structures - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration suppressing device for a structure, and more particularly to a vibration suppressing device for effectively attenuating the vibration of a structure generated by an external force such as an earthquake or wind.

[0002]

2. Description of the Related Art Oil dampers, steel dampers, viscous dampers, and the like have hitherto been cited as vibration damping devices used to attenuate the vibration of a structure. The oil damper is slidably fitted with a movable member that divides the inside of the cylinder into a plurality of hydraulic oil chambers, and the divided hydraulic oil chambers are communicated with each other by a small-diameter pipe. The cylinder and the movable member are relatively moved by following the displacement of the structure, and the hydraulic oil filled in one hydraulic oil chamber by the movable member is guided to the other hydraulic oil chamber through the small-diameter pipe, and the operation is performed. The vibration energy of the structure is absorbed by utilizing the flow path resistance generated when the oil passes through the small diameter pipe. The steel damper absorbs the vibration energy of the structure by the hysteresis deformation using the plastic deformation region. Further, the viscous damper encloses a viscous body in a container, moves a movable member attached to a structure in the viscous body, and absorbs vibration energy of the structure using viscous resistance generated at that time. I am trying to do it.

[0003]

The above-mentioned conventional vibration suppressing devices have the following disadvantages. That is, in the oil damper, since the movable range of the movable member is restricted by the size of the cylinder, it is assumed that the vibration suppressing action cannot be effectively obtained depending on the magnitude of the swing of the structure. This is a problem. In order to solve such problems,
Although it is necessary to increase the diameter and length of the cylinder, this causes a problem that the weight of the apparatus increases and the cost increases. There is also a disadvantage that the vibration damping action is limited in the length direction of the cylinder. In the steel damper, when the vibration of the structure is within the range of the elastic deformation region of the steel material, the steel material does not undergo plastic deformation and the vibration suppressing action cannot be obtained. Therefore, it is not applicable depending on the magnitude of the vibration.

[0004] Further, after the steel material undergoes a large-amplitude vibration and undergoes plastic deformation of a certain degree or more, the vibration damping effect cannot be obtained. Therefore, it is necessary to replace the steel material. Is limited to
Furthermore, a viscous damper requires a special configuration for injecting and containing a viscous material, which tends to complicate the structure, and, like the oil damper, limits the range of movement of the movable member depending on the size of the container. Therefore, in order to expand the vibration suppression range, it is unavoidable to increase the size, and since the viscosity of the viscous body changes with temperature,
The vibration suppressing action depends on temperature, which is not preferable. Therefore, conventionally, it is desired to deal with such a problem, and the present invention is intended to solve such a problem.

[0005]

Means for Solving the Problems To achieve the above object,
Therefore, the vibration suppression device for structures of the present invention
Formed with thermoplastic rubber as the main component and laminated in multiple layers
Vibration suppression consisting of an energy absorber (2) provided as
Control device (1) and the main vibration suppression device (1) in parallel.
From a laminated rubber (10)
Auxiliary vibration suppressing device (11) and these main vibration suppressing devices
(1) and supported on the upper part of the auxiliary vibration suppression device (11).
The natural vibration of the structure (20) whose vibration is to be suppressed.
Inertia mass body (21) displaced with the same oscillation period as the period
It is characterized by comprising. In addition, the energy absorption
The collecting body (2) and the laminated rubber (10) are at least partially
Are connected by a common connecting plate.
Multi-layered as a whole, connected at intervals in the plane direction
It is characterized by comprising.

[0006]

The main vibration suppressing device comprising an energy absorber formed of asphalt and thermoplastic rubber generates a strong viscous shear resistance against a shear force generated by the vibration of the structure, thereby causing the vibration of the structure. Energy is absorbed to suppress the vibration of the structure. In addition, the energy absorber can be sheared up to 800% of its thickness,
It is possible to cope with large vibrations. In addition, the deformation direction is arbitrary, and a vibration suppressing action in all directions can be obtained. Further, by adopting a multi-layer structure, a large deformation amount is obtained by adding the deformation amount for each stage, and the vibration range that can be suppressed is expanded. Furthermore, when vibration occurs in the structure, the vibration direction of the structure and the vibration direction of the inertial mass body are in opposite phases, and a shearing force acts on the energy absorber, and the shearing of the energy absorber accompanying this occurs. Due to the deformation, the vibration energy of the structure is absorbed, and the vibration of the structure is suppressed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, referring to FIGS.
Main vibration suppression device, that is, auxiliary vibration suppression described later
Main vibration suppression device consisting of energy absorber without using device
The principle of the suppression of the position will be described. This main vibration suppression device 1
An absorber unit 4 is formed by attaching a mounting plate 3 made of an iron plate or an aluminum plate to the upper and lower surfaces of a sheet-like energy absorber 2 formed mainly of asphalt and thermoplastic rubber. A plurality (four in the present embodiment) of the body units 4 are stacked in a multi-stage manner via a connection plate 5.

The energy absorber 2 is set based on the required deformation and damping capacity, and the number of layers to be stacked. When attaching the mounting plate 3 to the energy absorber 2, the absorber unit 4 is formed without using other bonding means such as an adhesive because the energy absorber 2 has a strong adhesive force. You. In addition, since the energy absorber 2 has no fluidity and has high prototype holding characteristics in a state where no external force is applied, the absorber unit 4 can be easily formed. Main vibration of the present embodiment thus configured
The suppression device 1 is installed between the portions 6 where relative movement occurs due to the vibration of the structure so that interlayer deformation occurs in the energy absorber 2. That is, the mounting plates 3 are installed so as to move in the respective deformation directions.

[0009] Then, the structure, earthquake, wind, or
When vibration occurs due to a mechanical external force or the like, the two parts 6
As shown in FIG. 2, the energy absorbers 2 of the stacked absorber units 4 are subjected to a shearing deformation, and the vibrating resistance accompanying the deformation absorbs the vibration energy of the structure, thereby damping the vibration. Action occurs. Here, looking at the energy absorbing action of the energy absorber 2, the result shown in FIG. 3 was obtained. FIG. 3 shows the load when the energy absorber 2 is shaped as 34 cm × 34 cm × 0.5 cm × 2 (shield × width × thickness × number of steps) and the energy absorber 2 is subjected to a vibration with a frequency of 0.33 Hz. It is a (Q) -deformation ((delta)) curve. From this figure, it is clear that the energy absorber 2 exhibits stable hysteresis characteristics and absorbs large energy.

In FIG. 2, when the relative movement amount of the two portions 6 is L, the amount of shear deformation of each energy absorber 2 is about L / 4, and the amount of shear deformation of each energy absorber 2 is small. Can be suppressed. In other words, an effective vibration damping action can be obtained even for a large amplitude. Next, a vibration suppressing device obtained by combining the energy absorber having the above configuration with a laminated rubber will be described with reference to FIGS. Main vibration suppression shown in FIGS. 1 and 2 is provided between the two portions 6.
Device 1 and auxiliary vibration suppressing device 11 made of laminated rubber 10
Are provided in parallel. That is, in the present embodiment, the laminated rubber 10 is disposed adjacent to the energy absorber 2 in the main vibration suppression device 1 , that is, the energy absorber 2 formed mainly of asphalt and thermoplastic rubber.
Are arranged side by side, and the energy absorber 2 and the laminated rubber 10 are fixed to a common connection plate 5 for each layer, and are arranged at an interval in the surface direction of the connection plate 5. With such a configuration, with the vibration of the structure, as shown in FIG. 5, when the relative movement between the respective parts 6 occurs, of the main vibration suppression device 1 Contact and auxiliary vibration suppressing device 11 Energy absorber 2 and laminated rubber 10
Are subjected to shear deformation.

As a result, the vibration energy of the structure is absorbed by the energy absorber 2 and the laminated rubber 10, and the vibration is suppressed. In this embodiment, a vibration suppression characteristic different from the vibration suppression effect when the energy absorber 2 and the laminated rubber 10 are used independently is obtained. For example, FIG. 6 shows a comparison between the damping constant when only the laminated rubber 10 is used and the damping constant when both are used together. In this figure, the curve A shows the damping constant (h) with respect to the relative deformation speed (V) when both are used.
, And the curve B is that obtained when only the laminated rubber 10 was used. As is clear from this comparison,
Compared to the case of using only the laminated rubber 10, the damping characteristics can be largely changed. Therefore, the appropriate setting of the energy absorber 2 and the laminated rubber 10 can increase the setting width of the damping characteristic.

The vibration suppressing device having the above structure is mounted on a structure as shown in FIG. At a set position of the structure 20 (for example, on the roof), the main vibration of the embodiment shown in FIG.
The vibration suppression device 1 and the auxiliary vibration suppression device 11 are installed, the inertial mass body 21 is mounted on the upper portion of the vibration suppression devices 1 and 11, and the vibration period is made to match the national vibration period of the structure 20. It has a configuration. That is,
4 and 5 is the upper end of the structure 20, and the upper part is the lower end of the inertial mass body 21.

With such a configuration, when an external force acts on the structure 20 to generate vibration, the inertial mass body 21 starts to vibrate with a half cycle delay from the structure 20.
Therefore, the vibrations of the structure 20 and the inertial mass body 21 are in opposite phases, and as a result, the vibration of the structure 20 is
The vibration of the vibration damper 1 cancels out the vibrations, and the vibration damping action of the vibration suppression devices 1 and 11 occurs.
Is effectively suppressed.

In addition, since the inertial mass body 21 which is not a constituent part of the structure 20 is used, a limited position such as between the two parts 6 moving relatively, specifically, between the foundation and the structure. It is possible to exhibit an effective vibration suppressing action by installing it in other places. Note that the shapes, dimensions, and the like of the core constituent members shown in the above-described embodiment are merely examples, and can be variously changed based on the type of structure to be applied, the installation position, design requirements, and the like.

[0015]

As described above, the structure vibration suppressing device according to the present invention has the following excellent effects. By forming a main vibration suppressing device composed of an energy absorber by asphalt and thermoplastic rubber, a strong viscous shear resistance is generated against shear deformation generated by vibration of the structure, thereby causing vibration of the structure. Energy can be absorbed and vibration of the structure can be effectively suppressed. Further, the shear deformation of the energy absorber can be performed up to 800% of its thickness, and it is possible to cope with large vibration. Moreover, the direction of deformation of the energy absorber can be arbitrarily set, and the vibration suppressing action in all directions can be achieved. Moreover, the shape retention characteristic of the energy absorber in a state where no external force is applied eliminates the need for a container or the like for accommodating the energy absorber, and the strong adhesion of the energy absorber eliminates the need for a fixing member or the like. In addition, workability can be greatly improved. In addition, by forming a multilayer structure, a large deformation amount is obtained by adding the deformation amount for each layer, and thereby the vibration range that can be suppressed can be greatly expanded. Further, by providing the device having the above configuration on the structure and oscillating the inertial mass body in the opposite phase, the vibration energy of the structure can be absorbed. Even when it is impossible to install the apparatus between any two parts, the apparatus can be installed using the upper space of the structure, and can be applied to a wide range.

[Brief description of the drawings]

FIG. 1 is a front view showing the principle of a main vibration suppressing device according to an embodiment of the present invention .

FIG. 2 is a front view of an operation state of the main vibration suppressing device of FIG. 1;

FIG. 3 is a load-deformation diagram for explaining a damping characteristic of the energy absorber.

FIG. 4 is a front view of the vibration suppressing device used in one embodiment of the present invention .

FIG. 5 is a front view showing an operation state of the device of FIG. 4;

6 is a damping constant-relative deformation speed diagram for explaining the damping characteristic of the device of FIG. 5;

FIG. 7 is a front view showing the entire configuration of the embodiment of the present invention;

[Description of Signs] 1 ... Main vibration suppressing device 2 ... Energy absorber
6 ... site (structure) 10 ... laminated rubber 11 ...
Auxiliary vibration suppression device 20: Structure 21: Inertial mass body

Claims (2)

(57) [Scope of request for utility model registration] (1) Asphalt and thermoplastic rubber as main components
Energy that is formed as a stack
A main vibration suppressing device (1) comprising an absorber (2);
Provided in parallel with the vibration suppression device (1) and in a multilayer shape
Auxiliary vibration suppressor (1) made of laminated rubber (10)
1), the main vibration suppression device (1) and the auxiliary vibration suppression
It is supported on the upper part of the control device (11) and tries to suppress vibration.
At the same vibration period as the natural vibration period of the structure (20).
And an inertial mass body (21) . 2. The energy absorber (2) and the laminated rubber (10) have at least a part of layers connected to each other by a common connecting plate at intervals in a surface direction of the connecting plate, and have a multilayer structure as a whole. The vibration suppressing device for a structure according to claim 1, wherein the vibration suppressing device is configured as follows.