JP2722992B2 - Damping structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high damping device as a passive damping device for giving a high damping property to a response to an external vibration force such as an earthquake or a wind, and a variable damping device as an active damping device. The present invention relates to a vibration control structure using a damping device or a variable stiffness device together.

[0002]

2. Description of the Related Art Applicants have incorporated variable stiffness elements (seismic elements) in the form of braces and walls in a column-beam frame of a structure.
The stiffness of the variable stiffness element itself or the connection between the frame body and the variable stiffness element is made variable, and the characteristics of the external vibration force are analyzed by a computer against the external vibration force such as earthquake or wind.
Various types of active vibration control systems and variable rigidity structures have been developed to change the rigidity of the structure so as to be non-resonant and to secure the structure (for example, JP-A-62-268479, JP-A-63-1988). 114770, JP-A-63-114771, etc.).

In addition, various active vibration damping systems have been proposed in which a non-resonance or damping property of a structure is taken into consideration by using a hydraulic damping device having a variable damping coefficient of the device (for example, Japanese Unexamined Patent Publication (Kokai) No. Heisei (Kokai) No. Heisei 9 (1994) -207. 2-209568-71 etc.).

Further, as a vibration control device usable for these active vibration control systems, for example, Japanese Patent Application Laid-Open No. HEI 3-18660.
No. 2 cylinder lock device,
There is a variable damping device for the damping structure of No. The basic principle of a cylinder lock device as a variable stiffness device is that a hydraulic chamber is provided on both sides of a double rod type piston in a cylinder body, and pressure oil in both hydraulic chambers is closed by a switching valve or caused to flow by the piston. Is fixed or movable.

A variable damping device for a damping structure is installed in a frame of the structure, and the damping coefficient of the device is actively changed according to the characteristics of individual earthquakes, external wind forces, etc., so that the damping resistance is reduced. The vibration of the structure is reduced by the force, and the control which evaluates the damping property of the structure can be performed by the control means using a computer or the like.

As such a variable damping device for a vibration control structure, there is, for example, a device described in Japanese Patent Application Laid-Open No. 2-289969.

FIG. 4 shows an example of a variable damping device as a hydraulic circuit diagram. Hydraulic chambers 6 are provided on the left and right sides of a double rod type piston 3 reciprocating in a cylinder 2. By closing or flowing the internal pressure oil by means of a valve, the piston 3 is fixed or movable left and right.

[0008] By connecting the cylinder 2 and the rod 4 to the frame main body or the variable stiffness element of the structure, damping resistance is given to the deformation of the frame.

The left and right hydraulic chambers 6 respectively have an outflow check valve 8 for preventing outflow of pressurized oil from the hydraulic chamber 6 and an inflow check valve 9 for preventing inflow of pressurized oil into the hydraulic chamber 6.
Are provided, and an inflow channel 10 connecting the left and right outflow prevention check valves 8 and an outflow channel 11 connecting the left and right inflow prevention check valves 9 are provided.

The inflow channel 10 and the outflow channel 11
The flow control valve 12 is provided at the connection position of the... By changing the opening of the flow control valve 12, the damping coefficient c of the variable damping device 1 can be adjusted.

In this example, the flow control valve 12 has a large flow switching valve 12a having an inlet port 15 and an outlet port 16 at one end of a valve body and a back pressure port 17 at the other end.
A shut-off valve 12b capable of controlling the flow of pressure oil to the back pressure port 17; the shut-off valve 12b opens and closes in response to a command from the computer 14; accordingly, the large flow switching valve 12a operates. Then, the opening of the large flow switching valve 12a and the damping coefficient c of the device corresponding to the opening are adjusted and controlled.

That is, by adjusting the opening degree of the flow control valve 12 and finely adjusting the connection state between the completely locked state and the completely free state, various damping coefficients c are given. The natural period of the frame body and the damping constant h of the frame body at that time are given according to the vibration state of the frame body. In the case where control is performed in two stages of a locked state (fully closed) and a free state (fully opened), the apparatus becomes a variable rigidity apparatus.

The inflow channel 10 or the outflow channel 1
1 is provided with an accumulator 19 and the like for the purpose of compensating for a volume change due to a compression of the hydraulic oil and a temperature change.

[0014] On the other hand, as a passive vibration control method that does not require a control system using a computer or the like,
For example, JP-A-4-371679 and JP-A-5-59
There is a high attenuation device described in, for example, Japanese Patent No. 841.

FIG. 5 shows a basic structure of one example of the high damping device 21. The high damping device 21 has a piston 3 which moves in the cylinder 2, and a piston rod 4 which enters and exits from one end of the cylinder 2. Hydraulic chambers 6a, 6 on both sides of 3
Pressure regulating valves 22a and 22b are provided in a flow path for communicating b.

By the design of the pressure regulating valves 22a and 22b, a predetermined damping coefficient c corresponding to the vibration characteristics and the like is given to the device. The high damping device 21 having such a configuration is mounted on the piston rod 4 and the cylinder 2. By appropriately arranging the structures in the column-beam frame via the portions 25 and 26, a high damping property can be given to the structure.

In this example, the pressure regulating valves 22a, 22b
Is provided in the piston 3, that is, in a flow path penetrating the piston 3, an accumulator 19 is provided for the compression of oil during operation, and orifices 24 a and 24 b are provided in parallel with the check valves 23 a and 23 b. Rooms 6a, 6
It is configured to eliminate the pressure buildup in b.

[0018]

The variable stiffness device and the variable damping device change the locked state and the free state or change the damping coefficient c from moment to moment according to the vibration characteristics such as earthquake or wind or the response of the structure. Although there is an advantage that the optimal control can be performed, a problem arises when the control is stopped due to a failure.

On the other hand, the damping coefficient c of the high damping device can be set by the design of the pressure regulating valve or the like, but the optimum damping coefficient for suppressing the vibration of the structure is not only the vibration characteristic of the structure itself but also the individual characteristics. It differs depending on the characteristics of the earthquake and wind external force, and the seismic control effect is inferior to the variable damping device. On the other hand, the applicant of the present invention has disclosed in Japanese Patent Application No. 4-162923 a multi-fold linear type combining a pressure regulating valve for giving a different damping coefficient and a relief valve for coping with an external force exceeding the performance of the device. Although high damping devices for damping structures with damping coefficients have been proposed, they are limited to passive damping devices, so the damping effect is limited.

According to the present invention, a high damping device, which is a passive damping device, and a variable damping device or a variable stiffness device, which is an active damping device, are used together in a frame of a structure, and these are appropriately arranged. An object of the present invention is to provide a damping structure having a high damping effect even if the function of active control is impaired due to a failure or the like.

[0021]

According to the present invention, there is provided a vibration control structure comprising:
A high damping device 21 having a predetermined damper function as a passive damping device and a variable damping device 1 or a variable stiffness device as an active damping device provided with control means are arranged in a frame of a structure. It is characterized by having done.

As the high damping device 21, those described in the section of the prior art and the section of the means for solving the problems can be used. It has a piston 3 that moves, a piston rod 4 that enters and exits from one end of the cylinder 2, a hydraulic chamber 6 formed on both sides of the piston, and a pressure regulating valve 22 that is provided in a flow path that connects the hydraulic chambers 6 with each other. Realize the coefficient.

As the variable damping device 1 or the variable stiffness device, those described in the section of the prior art can be used, and the basic configuration of the variable damping device 1 is the cylinder 2, the cylinder 2
Piston 3, which moves inside, piston rod 4 which enters and exits from one end of cylinder 2, hydraulic chambers 6 formed on both sides of the piston, flow control valve 12 provided in a flow path connecting both hydraulic chambers 6, and vibration control And control means using a computer or the like for controlling the degree of opening of the flow control valve 12 in response to an external force acting on the target structure or the response of the structure.

The variable stiffness device corresponds to a variable damping device in which the flow control valve 12 in the variable damping device 1 is replaced with an on-off valve that changes between an open state and a closed state, and a connection state between structural members or seismic elements in a frame. Can be changed between the locked state and the free state by the control means.

Examples of the arrangement of the high-damping device 21 and a variable damping device 1 or variable stiffness device can be arranged both in parallel or in series in the same Beam rack premises (vs. in claim 1
A) In this case, there is an advantage that the space occupied by the device in the entire structure can be reduced.

Further, the high damping device can be 21 and the variable damping device 1 or placing the variable stiffness device different Beam Frames, placed Beam Frames planar in different positions for example these on floor Can be considered .
Yes . In addition, these are arranged in different layers in elevation.
In that case, at least the top layer
Makes the high-attenuation device 21 come.
Yes. In addition, the high attenuation device 21 is arranged in the upper layer,
A variable damping device 1 or a variable stiffness device is arranged in a lower layer,
In the lower layer, the high attenuation device 21 is also arranged, and
An arrangement is also possible.

In addition, it is also possible to combine various arrangements in the same column and beam frame or to arrange them in different layers in elevation or different positions in two dimensions in one structure.

The installation of the variable damping device 1 and the high damping device 21 on the column-beam frame is the same as that of the conventional variable rigidity device or high damping device. For example, the cylinder 2 main body is connected to the beam of the frame, and the cylinder 2 Is connected to a side of a seismic element such as a brace or an earthquake-resistant wall.

The connection relationship between the cylinder 2 main body and the rod 4 with respect to the frame or the seismic element may be the reverse of the above-described case, or may be installed between the seismic elements in the frame to connect the seismic elements.

[0030]

1 to 3 show an example of the arrangement of a variable damping device 1 and a high damping device 21 in a damping structure A as an embodiment of the present invention.

The embodiment of FIG. 1 shows a case where the variable damping device 1 and the high damping device 21 are installed in the same beam-column structure. An inverted V-shaped brace 33 is provided, and the variable damping device 1 and the high damping device 21 are interposed at the connection position between the beam 32 and the brace 33.

The high damping device 21 is not controlled, and only the variable damping device 1 is controlled in response to an external force such as an earthquake or wind or a response of a structure.

In the embodiment shown in FIG. 2, the variable damping device 1 and the high damping device 21 are installed in different column structures on the same floor.

In the embodiment shown in FIG. 3, the variable damping device 1 and the high damping device 21 are arranged separately in layers. In this example, the high damping device 21 is arranged on the upper floor, and the variable damping device is arranged on the lower floor. The device 1 is arranged. In addition, it is conceivable to alternately arrange every first floor or every several floors.

In the present invention, a variable stiffness device may be used instead of the variable damping device 1 in each of the above embodiments.

[0036]

The passive damping can be added by using the high damping device in combination with the active damping device.

The high damping device, which is a passive type vibration damping device, becomes fail-safe for the variable damping device or the variable stiffness device, which is an active type vibration damping device.

The use of a variable damping device or a variable stiffness device also provides a non-resonant effect.

Even in the event of a power outage, locking the active vibration damping device side increases the resistance to earthquakes by that much.

By locking the side of the active vibration damping device, the deformation at the time of strong wind can be reduced as compared with the case where only the high damping device is used.

By operating the variable damping device, it is possible to control to give an optimum damping force.

The high damping device and the variable damping device or the variable stiffness device can be selectively used depending on the vibration level of an earthquake, wind, or the like, and the frequency of active control is reduced, thereby improving the durability of the system.

[Brief description of the drawings]

FIG. 1 is an elevational view showing an example of the arrangement of a high attenuation device and a variable attenuation device according to an embodiment of the present invention.

FIG. 2 is a plan view showing an arrangement example of a high attenuation device and a variable attenuation device according to another embodiment of the present invention.

FIG. 3 is a plan view showing an arrangement example of a high attenuation device and a variable attenuation device according to still another embodiment of the present invention.

FIG. 4 is a hydraulic circuit diagram showing an example of a conventional variable damping device.

FIG. 5 is a schematic diagram showing a basic configuration of a conventional high attenuation device.

[Explanation of symbols]

A: Damping structure, 1 ... Variable damping device, 2 ... Cylinder, 3
... piston, 4 ... piston rod, 6 ... hydraulic chamber, 8 ... check valve for outflow prevention, 9 ... check valve for inflow prevention, 10
... inflow passage, 11 ... outflow passage, 12 ... flow control valve,
13: Valve opening controller, 14: Computer, 15
... inlet port, 16 ... outlet port, 17 ... back pressure port,
19: accumulator 21: high damping device, 22: pressure regulating valve, 23: check valve,
24 orifice, 25, 26 mounting part, 31 pillar, 3
2 ... beams, 33 ... braces

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Naoki Niwa Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku, Tokyo (56) References JP-A-4-272371 (JP, A)

Claims (7)

(57) [Claims] 1. A high damping device having a predetermined damper function as a passive type vibration damping device, wherein structural members or seismic elements constituting the frame are connected to each other within a frame of the structure.
A variable damping device that gives a predetermined damping coefficient according to external force or the response of a structure as an active vibration damping device with control means, is arranged in parallel or in series in the same beam-column structure, and is used together A vibration control structure characterized by the following. 2. A frame is formed in each of the frames of the structure.
Passive structural system by connecting structural members or
A high damping device having a predetermined damper function as a vibration device,
External force or structure as active vibration control device with control means
Variable damping device that gives a predetermined damping coefficient according to the response of an object
And are divided into column-beam frames at different positions in plan,
A seismic control structure characterized by being placed in a vertical position. 3. A frame is formed in each of the frames of the structure.
Passive structural system by connecting structural members or
A high damping device having a predetermined damper function as a vibration device,
External force or structure as active vibration control device with control means
Variable damping device that gives a predetermined damping coefficient according to the response of an object
And on different layers in elevation, and at least on the top layer
Indicates that they are used in combination so that a high-attenuation device comes.
Vibration control structure. 4. The high damping device includes a cylinder, a piston moving in the cylinder, a piston rod coming in and out of one end of the cylinder, a hydraulic chamber formed on both sides of the piston, and the two hydraulic chambers. The vibration damping structure according to claim 1, further comprising a pressure regulating valve provided in a flow path that communicates with the pressure control valve. 5. The variable damping device includes a cylinder, a piston that moves in the cylinder, a piston rod that enters and exits from one end of the cylinder, hydraulic chambers formed on both sides of the piston, and both hydraulic chambers. And a control means for controlling the opening of the flow control valve in accordance with an external force acting on the structure to be subjected to vibration damping or a response of the structure. Claims 1, 2, and 3
Or the damping structure according to 4. 6. A variable stiffness device, wherein a variable stiffness device for changing a connection state between the structural members or the seismic elements between a locked state and a free state is used in place of the variable damping device. 5. The vibration control structure according to 3 or 4. 7. The variable stiffness device includes a cylinder, a piston that moves in the cylinder, a piston rod that enters and exits from one end of the cylinder, hydraulic chambers formed on both sides of the piston, and both hydraulic chambers. 7. An on-off valve provided in a flow path that communicates with a valve, and control means for controlling opening and closing of the on-off valve in response to an external force acting on a structure to be subjected to vibration control or a response of the structure. The described damping structure.