JPH0666044A - Vibration isolating wall device - Google Patents

Abstract

PURPOSE:To carry out vibration isolation stably at all times for a wide variety of joltings caused by winds, earthquake, etc., in the inter-columnar part and inter-beam part of a structure. CONSTITUTION:A frame 10 is secured to the beam 3 side while an aux. frame 11 is fixed to the wall 5 side. In the form of connecting the frame 10 to the aux. frame 11, an energy absorbing body 12 is installed whose visco-elasticity is variable in accordance with the voltage, and at normal times (out of earthquake), a voltage is impressed between the frame 10 and aux. frame 11 through a voltage control device 15, and the wall 5 is rigidly supported by a visco-elastic damper 6. When a vibration sensor 9 senses vibration of the structure concerned 1, the visco-elasticity of the energy absorbing body 12 is adjusted to the proper value for absorbing the vibration by means of increase or decrease of the voltage between the frame 10 and aux. frame 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damping wall device which can be incorporated into a column or beam portion of a structure to exert a damping effect.

[0002]

2. Description of the Related Art Recently, various types of vibration damping devices have been proposed in order to suppress the shaking generated in a structure due to an earthquake, wind, or the like, but many of them are incorporated in the foundation of the structure. However, in addition to such a method, if there is a vibration damping device capable of absorbing vibration in each layer of the structure, even if the vibration damping performance of each individual device is relatively small, it is possible to work effectively. Development was desired.
Therefore, the walls and columns of each floor are formed with a gap, and the walls are connected to the beams via appropriate dampers to prevent the shaking that occurs during an earthquake from viscoelasticity and plasticity of the energy absorber that constitutes the dampers. A damping wall device that absorbs strain energy or the like has been proposed.

[0003]

By the way, in such a damping wall device, when a so-called passive damping system is attempted, it is possible to cover from a small sway caused by wind or a small earthquake to a large sway caused by a large earthquake. Is extremely difficult to manufacture. Therefore, usually, multiple dampers should be set such that small vibrations are absorbed by the viscosity of the viscous damper, while large vibrations are absorbed by the elasto-plastic dampers such as steel dampers, friction dampers and lead dampers. It has to be connected. In response to such passive vibration control, various so-called semi-active vibration control methods have recently been proposed in which the rigidity and damping of a building are changed every moment to control the shaking. However, in such semi-active type vibration control, it is quite difficult to manufacture the device to continuously change the rigidity and damping of the building or to change it to an arbitrary size, and it corresponds to the large and small shaking that occurs in the building. It was extremely difficult to effectively dampen this at all times. Therefore, the present invention is a simple method in view of the above circumstances,
An object of the present invention is to provide a damping wall device capable of continuously and effectively responding to a wide variety of large and small shakings that can occur in a building.

[0004]

That is, the present invention has a plurality of columns (2) and beams (3), and among these columns (2) and beams (3), columns (2) adjacent to each other are provided. ) And a beam (3) provided with a seismic resistant element member (5), the beam (3) is provided with a first electrode (10) and the seismic resistant element member (5) is provided with a second electrode. An electrode (11) is provided, and an energy absorber (1) made of a viscoelastic material whose viscoelasticity is variable according to a voltage is provided between the first and second electrodes (10) and (11).
2) is provided, and the first and second electrodes (10) and (11) are provided.
The viscoelasticity adjusting means (1) of the energy absorber (12)
3) and (15) to the first and second electrodes (10),
The energy absorbers (12) are connected so that the viscoelasticity of the energy absorber (12) can be increased or decreased by raising or lowering the voltage across them. The numbers in parentheses () indicate the corresponding elements in the drawings for convenience, and therefore the present description is not limited to the description in the drawings. below

The same applies to the column of [Operation].

[0005]

With the above-mentioned structure, the present invention changes the voltage between the first and second electrodes (10) and (11) according to the magnitude of vibration to increase and decrease momentarily, and the energy absorber (12). To
It acts so as to change the viscoelasticity optimum for absorbing the vibration.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a view showing an embodiment of a damping wall device according to the present invention, FIG. 2 is a side view showing an example of a viscoelastic damper, FIG. 3 is a side view showing another example of a viscoelastic damper, and FIG. 4 is a viscoelastic damper. It is a schematic diagram which shows an example of the energy absorber of an elastic damper.

As shown in FIG. 1, the structure 1 has columns 2 standing upright at a predetermined interval, and a beam 3 is formed between the columns 2 so as to connect the columns 2 to each other. It is installed horizontally. A wall 5 made of precast concrete is provided in a space surrounded by columns 2 and 2 adjacent to each other in the left-right direction and beams 3 adjacent to each other in the up-down direction in a form connected to the upper beam 3 in the figure. Between the lower edge 5d of the wall 5 in the figure and the upper surface 3d of the beam adjacent to the lower edge 5d, a viscoelastic damper 6 constituting a damping wall device 60 is provided between the beam 3 and the wall 5. It is provided in the form of connecting. A gap 9 is formed between the peripheral columns 2 and the beams 3 at both side edge portions 5c, 5c and the lower edge portion 5d in the figure other than the portion of the wall 5 supported by the viscoelastic damper 6.

In the viscoelastic damper 6, as shown in FIG. 2, a metallic frame 10 having a U-shaped cross section fixed to the beam 3 side through a base plate 7 made of an electrically insulating material is attached to the member mounting surfaces 10a and 10a. Are provided so as to face each other and extend in the direction perpendicular to the plane of the drawing in the drawing.
A metal auxiliary frame 11 having a T-shaped cross section is formed between a and 10a such that the member mounting surfaces 11a and 11a are opposed to the member mounting surfaces 10a and 10a of the frame 10 and extend in the direction perpendicular to the plane of the drawing. It is provided. That is, frame 10
2 and the auxiliary frame 11 are in the beam width direction with the member mounting surface 10a and the member mounting surface 11a facing each other.
They are arranged side by side in a pair in the directions of the middle arrows C and D, and both extend in the directions of arrows A and B in FIG. 1, which are the damping directions set in the viscoelastic damper 6. The upper portion of the auxiliary frame 11 in the figure is fixed to the lower edge portion 5d of the wall 5 via a base plate 16 made of an electrically insulating material, and each member mounting surface 10a, 1
An energy absorber 12 made of a viscoelastic material is connected between 1a in such a manner that both mounting surfaces 10a and 11a are connected in the directions of arrows C and D in FIG. 2, that is, in the embodiment shown in FIG. Two sheets are provided in a form of stacking in parallel. In the energy absorber 12 attached to the viscoelastic damper 6, as shown in FIG. 4, the dielectric fine particles 19 are contained in the base material 120 made of rubber or the like.
Are mixed in such a manner that they are evenly dispersed, that is, the energy absorber 12 is applied to the dielectric fine particles 1 by applying a voltage.
9 is polarized, and + and − of the respective fine particles 19 are attracted to each other and are fixed in the base material 120, whereby the viscoelasticity can be adjusted in such a manner that the rigidity of the entire energy absorber 12 is increased. It is a thing. In addition, the viscoelastic damper 6
In the upper and lower parts of the energy absorber 12 in FIG.
17 are formed.

Further, as shown in FIG.
A vibration sensor 13 that detects the vibration of the structure 1 is provided, and a voltage control device 15 is connected to the vibration sensor 13. The voltage control device 15 is connected to the frame 10 and the auxiliary frame 11 of each viscoelastic damper 6, and the voltage control device 15 uses the frame 10 as a cathode and the auxiliary frame 11 in the embodiment shown in FIG. As the anode, an arbitrary voltage can be applied to the energy absorber 12.

Since the structure 1 and the like have the above-mentioned structure, normally, when the structure 1 is not vibrating, the frame 10 and the auxiliary frame 1 are operated via the voltage controller 15.
1 as an electrode, a predetermined voltage VH is applied to the energy absorber 12.
Is applied. Then, when the predetermined voltage VH is applied to the energy absorber 12 in the normal state, the respective dielectric fine particles 19 are polarized and +-attracted to each other, whereby the rigidity is maintained as described above, and the energy is absorbed. The absorber 12 exhibits a rigid state. In the normal state, the wall 5 is supported by the beam 3 via the energy absorber 12 in a rigid state, so that the artificial vibration (mechanical equipment, exercise facility, etc.) generated in the structure 1 may occur. It is prevented that the wall 5 and the like shake unnecessarily due to vibration (vibration) or vibration generated outside the structure 1 (ground vibration due to vehicle traveling or the like).

Next, assuming that the structure 1 vibrates in the horizontal arrows A and B due to an earthquake or wind, relative vibration occurs between the beam 3 and the wall 5 in the directions A and B. The vibration sensor 13 detects the vibration and outputs a vibration detection signal S1 to the voltage controller 15. In response to this, the voltage control device 15
The voltage VH of the energy absorber 12 is set and changed to an appropriate voltage VL adapted to the vibration of the structure 1. Then, the viscoelasticity of the energy absorber 12 changes according to the voltage VL set by the voltage controller 15. That is, normally the voltage VL
Is set to be lower than the voltage VH, which weakens the attraction force between the + and − of the dielectric fine particles 19 to each other, and the energy absorber 12 has a flexible member state in which elastic deformation is possible. Present. The energy absorber 12 exhibits viscoelasticity most suitable for absorbing the vibration of the structure 1, and in this state, the energy absorber 12 is deformed so as to damp the vibration of the structure 1, thereby The vibration energy of the object 1 is quickly absorbed. That is, when the structure 1 vibrates, the arrow A between the beam 3 and the wall 5
Due to the relative vibration in the B direction, the frame 10 fixed to the beam 3 side and the auxiliary frame 11 fixed to the wall 5 side try to move relatively in the arrow A and B directions. To do. Then, since the frame 10, the auxiliary frame 11, and the energy absorber 12 are both extended in the directions of arrows A and B, which are vibration directions, the relative movement of the beam 3 and the wall 5 due to the vibration. The operation is absorbed by the energy absorber 12 being deformed along the entire length in the directions of arrows A and B (that is, the entire surface in the damping direction), and is smoothly attenuated.

In this way, when the vibration of the structure 1 is subsided and the vibration sensor 13 detects it, the voltage VL applied to the energy absorber 12 via the voltage control device 15 is restored to the voltage VH, and the viscous force is restored again. The elastic damper 6 continues to support the wall 5 as a rigid member. That is, the energy absorber 12 can freely develop any viscoelasticity by raising or lowering the voltage via the voltage controller 15, so that a wide variety of vibrations generated in the structure 1 by the viscoelastic damper 6 can be generated. It is possible to efficiently dampen by selectively dampening.

In the above-described embodiment, the viscoelastic damper 6 constituting the damping wall device 60 comprises a frame 10 having a U-shaped cross section and an auxiliary frame 11 having a T-shaped cross section, as shown in FIG. Two energy absorbers 12, 12 in between
Although the example in which is attached and configured is described, more energy absorbers 12 may be attached to the viscoelastic damper 6. That is, for example, as shown in FIG. 3, the frame 10 ′ and the auxiliary frame 11 ′ are attached to the member mounting surface 10
a ', 11a' are formed so as to be aligned in a plurality (5 pairs in FIG. 3) in the directions of arrows C and D in FIG. 3, which are directions orthogonal to the damping direction, facing each other. Alternatively, the energy absorber 12 may be mounted between the member mounting surfaces 10a 'and 11a' to configure the viscoelastic damper 6 '. Then, the viscoelastic damper 6 ′ shown in FIG. 3 has the member mounting surfaces 10 ′, 1 ′ as compared with the viscoelastic damper 6 shown in FIG.
By increasing 1 ′, a plurality of vibration damping surfaces of the energy absorber 12 (that is, a plurality of layers are laminated in a direction parallel to the paper surface in FIG.
The total area of the surface that can absorb the vibration energy of
The viscoelastic damper 6'can absorb the vibration energy more efficiently. Since each energy absorber 12 can be made thin, it is possible to save the space of the damper. Further, since the viscoelastic damper 6'on which a number of thin energy absorbers 12 are mounted as described above can increase the total area of the damping surface, it is also effective in immediately damping the vibration having a small vibration amplitude. , Therefore,
It is also possible to use the viscoelastic damper 6 ′ for damping daily microvibrations or the like that occur in the structure 1 other than during an earthquake. Since the base material 120 of the energy absorber 12 is a viscoelastic member such as rubber, the energy absorber 12 itself can maintain its shape even when no voltage is applied. It is easy to handle, and therefore, when molding the viscoelastic damper 6 (6 '), it is easy to simply attach the plate-shaped energy absorber 12 between the frame 10 and the auxiliary frame 11 in advance. You can do this. Therefore, by changing the plate thickness of the energy absorber 12, there is no concern that the manufacturing process and the construction process of the viscoelastic damper 6 (6 ′) will be complicated. Further, in the embodiment shown in FIGS. 2 and 3, the viscoelastic damper 6 (6 ′) is the beam 3
Is provided between the upper surface 3d side of the and the lower edge portion 5d of the wall 5,
The example in which the damping wall device 60 (60 ′) is configured has been described.
The viscoelastic damper 6 (6 ′) may be arranged between the upper side of the wall 5 and the lower side of the beam 3. Further, although the example in which the vibration sensor 13 is provided on the beam 3 has been described in the embodiment,
The installation positions of the vibration sensor 13 and the voltage control device 15 may be arbitrarily set, and the vibration sensor 1
A plurality of viscoelastic dampers 6 may be connected to 3 and the voltage control device 15.

[0014]

As described above, according to the present invention,
Having a plurality of columns 2 and beams 3, of which columns 2 and beams 3
In a structure 1 in which a seismic resistant element member such as a wall 5 is provided between a pillar 2 and a beam 3 which are adjacent to each other, a first electrode such as a frame 10 is provided on the beam 3 and an auxiliary frame 11 or the like is provided on the seismic resistant element member. A second electrode is provided, an energy absorber 12 made of a viscoelastic material whose viscoelasticity is variable according to a voltage is provided between the first and second electrodes, and the energy absorber 12 is provided between the first and second electrodes. ,
The viscoelasticity adjusting means of the energy absorber 12, such as the vibration sensor 13 and the voltage controller 15, raises and lowers the voltage between the first and second electrodes to cause the energy absorber 12 to move.
Since it was configured by connecting so as to increase or decrease the viscoelasticity of
It is possible to change the voltage between the first and second electrodes up and down every moment according to the magnitude of the vibration to change the energy absorber 12 to the optimum viscoelasticity for absorbing the vibration. Therefore, the energy absorber 12 can always exhibit a highly efficient and stable vibration damping property in the limited space between the pillar 2 and the beam 3. Then, adjusting the energy absorber 12 to the optimum viscoelasticity for absorbing various vibrations generated in the structure 1 can be easily performed by a simple method of simply increasing and decreasing the voltage via the viscoelasticity adjusting means. Therefore, when the structure 1 does not vibrate, the rigid state of the energy absorber 12 is maintained to rigidly support the seismic element member through the energy absorber 12 in the rigid state, and the structure. When various vibrations occur in the energy absorber 1,
2 is adjusted to a flexible state, that is, an arbitrary viscoelasticity most suitable for absorbing the vibration, and the vibration of the structure 1 is converted into energy between the columns 2 and the beams 3 of each floor and the seismic element member. The absorption by the absorber 12 enables efficient attenuation. Therefore, by connecting the seismic resistant element member to the beam 3 by the damper using the energy absorber 12 and assembling it between the columns 2 and the beams 3, from normal shaking due to wind or small earthquake to large shaking during large earthquake. Since it is easy to constantly and continuously respond to a wide variety of vibrations, the structure 1 to which the damping wall device according to the present invention is applied can always exhibit stable and excellent damping properties.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a damping wall device according to the present invention.

FIG. 2 is a side view showing an example of a viscoelastic damper.

FIG. 3 is a side view showing another example of the viscoelastic damper.

FIG. 4 is a schematic diagram showing an example of an energy absorber of a viscoelastic damper.

[Explanation of symbols]

 1 ... Structure 2 ... Pillar 3 ... Beam 5 ... Wall (seismic element member) 60 (60 ') ... Damping wall device 10 (10') ... Frame (first electrode) 11 (11) ') ... Auxiliary frame (second electrode) 12 ... Energy absorber 13 ... Vibration sensor (rigidity adjusting means) 15 ... Voltage control device (rigidity adjusting means)

Claims (1)

[Claims] 1. A structure having a plurality of pillars and beams, wherein among these pillars and beams, a seismic resistant element member is provided between adjacent pillars and beams, wherein the beams are provided with a first electrode, A second electrode is provided on the seismic resistant element member, an energy absorber made of a viscoelastic material whose viscoelasticity is variable according to a voltage is provided between the first and second electrodes, and the first and second electrodes are provided. A viscoelasticity adjusting means for the energy absorber is connected to the electrode so that the viscoelasticity of the energy absorber can be increased or decreased by increasing or decreasing the voltage between the first and second electrodes. Swing device.