JP2616334B2 - High damping structure for control of column axial deformation - 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 structure for controlling deformation in the direction of a column axis, which is suitable mainly for a building having a large amount of bending deformation such as a high-rise building, but also for a vibration reduction effect against vertical earthquake motion. is there.

[0002]

2. Description of the Related Art The deformation of a high-rise building subjected to an earthquake or wind is
It is expressed by the sum of the shear deformation component of the frame due to the bending and shear deformation of the column and beam members and the bending deformation component of the entire frame due to the axial deformation of the column. As the building is slender and taller than the width of the building, the bending deformation component of the entire frame becomes larger. Also, when receiving vertical earthquake ground motion, large vertical vibrations occur in each floor due to the axial deformation of the columns.

On the other hand, Japanese Patent Application Laid-Open No.
In 240341, a variable damping device (coupling device) having a variable damping coefficient is interposed in the middle or at the end of a rod-shaped control member extending along a pillar of a multi-story building as a vibration control frame having a bending deformation control mechanism. A structure is described in which the connection state of the control members is controlled in accordance with the vibration characteristics of the seismic motion or the like, and the response of the building to the seismic motion or the like is reduced.

[0004]

A conventional active vibration control system incorporating a variable stiffness element focuses on the relationship between the predominant period of a seismic motion or the like and the natural frequency of a structure. On the other hand, avoid the resonance phenomenon by actively shifting the natural frequency of the structure, or increase the damping coefficient of the building by changing the damping coefficient of the coupling device of the variable stiffness element according to the vibration level. , The amount of response is reduced.

[0005] However, in the case of an active vibration control system, since a drive device and various sensors are used in addition to a control computer, various kinds of safety maintenance mechanisms are required in case of any abnormality. The control mechanism becomes complicated,
There may also be cost issues. Further, there may be a case where it takes time until a sufficient effect is exhibited due to a delay in control.

The present invention enables passive vibration control without the need for a control system using a computer program or the like, and responds to the response phenomenon caused by the axial deformation of the column as described in the preceding section. The aim is to greatly reduce the amount of response, ensure the safety of the entire building, and realize a comfortable living space.

[0007]

According to the present invention, a bar-shaped control member extending over at least a plurality of floors in the height direction of a building is provided along columns of a multi-story building, and the upper and lower parts of the control member are connected to the building. , Preferably at the top and bottom. A high damping device as a passive damping device that gives a predetermined damping coefficient is provided in the middle or at the end of the control member, and the control members are connected to each other or the control member and a part of the building via the high damping device. By doing so, it is possible to greatly reduce the bending deformation of the building and the deformation in the column axis direction due to vertical earthquake motion against vibration disturbance such as an earthquake or wind.

The deformation control mechanism in the column axis direction may be provided on the outer column of a building when the main purpose is to effect bending deformation of a high-rise building. What is necessary is just to provide in a pillar similarly.

[0009] As the control member, a steel pipe, a shaped steel, or another bar-shaped member is used. When the column main body is a steel pipe such as a square steel pipe, the deformation control mechanism can be prevented from appearing on the surface by inserting a steel pipe or the like as a control member inside the steel pipe.

[0010] To exhibit the damping coefficient required in the present invention
For high damping devices, higher than normal dampers
It is required to have a structure capable of realizing a damping coefficient. So
Therefore, in the present invention, as a high damping device,
Is the cylinder body connected to the seismic
Piston moving inside the cylinder body and the end of the cylinder body
From which the cylinder body is fixed or
A frame connected to the frame or seismic element facing the seismic element
Stone rod and hydraulic chamber formed on both sides of piston
And multiple flows that penetrate the piston and connect both hydraulic chambers
Accumulator installed in the bypass connecting the hydraulic passage and the hydraulic chamber
And each of the two hydraulic chambers
Installed between the accumulator and the hydraulic chamber
A pair of check valves to prevent outflow and a bypass
Structure with orifices provided in parallel with each check valve
Was used. Such a high attenuation device,
Velocity generated in the device (cylinder body and piston rod
The relationship between the relative speed) and the load has a nearly linear characteristic.

[0011]

[Function] In a high-rise building, the entire frame undergoes bending deformation due to an earthquake or wind, and individual columns undergo axial deformation (expansion and contraction). When the control member along the column is connected by a hydraulic high damping device as described above, the movement due to the axial deformation of the column results in a relative displacement between the cylinder and the piston of the device.

When the uppermost part and the lowermost part of the building are connected, the deformation is large, and the high attenuation device can be effectively used. Although the present invention provides a passive vibration damping mechanism, a large damping property can be given to a building by setting the damping coefficient of the high damping device to a predetermined high damping coefficient.

Further, the control member bears almost only the axial force, and the buckling can be effectively resisted to the axial force by restraining the displacement in the direction perpendicular to the axis by using the diaphragm of each layer.

[0014]

Next, an embodiment will be described.

FIGS. 1 to 3 show an embodiment of the present invention, in which an inner steel pipe 1 as a control member is installed inside an outer steel pipe 2 constituting an outer pillar 2a of a high-rise building. The inner steel pipe 1 is rigidly connected at the uppermost part and the lowermost part by the joining plate 6 and the diaphragm 5. At the uppermost part, the axial force of the outer steel pipe 2 is transmitted to the inner steel pipe 1, and at the lowermost part, the axial force of the inner steel pipe 1 is transmitted. It is transmitted to underground pillars and foundations.

As shown in FIG. 3, the inner steel pipe 1 is separated from the diaphragm 4 at the beam-column joint with a small gap on the reference floor, and a high damping device 10 provided below the inner steel pipe 1. In this state, relative movement in the axial direction is possible.

FIGS. 4 and 5 show the outline of a building to which the structure of the present invention is applied. In this embodiment, the main purpose is to control bending deformation, and outer pillars on the outer periphery of the building are effective for bending deformation. Only 2a has the above-described double steel pipe structure, and the inner column 2b has a normal structure. Further, the high attenuation device 10 includes the outer column 2a
It is installed on the first floor.

The high damping device 10 used in the present invention is a device having a characteristic in which the relationship between the load F generated in the device and the speed V is close to linear, and the damping coefficient (F / V [t / kine]) is required.

FIG . 6 shows a cylinder 11 and a piston 12 and
The oil damper composed of the pressure regulating valve 13 such as a proportional valve
In this case, the cylinder 11 is shaken.
Connected to the seismic element side such as
Moving double rod type piston 12 is connected to the beam-column structure side
By adjusting the opening of the pressure regulating valve 13, a specific damping can be achieved.
Coefficient can be set. However, in the case of a conventional oil damper or other damper, the obtained damping coefficient is 0.5 to 1.0 t /
about kine, for example, holding force 200t, damping coefficient 25
In order to realize about 50 t / kine, a damping device having a structure as shown in FIG. 7 is desirable.

The basic structure of the damping device 10 shown in FIG. 7 is as shown in the conceptual diagram of FIG. 6, in which a cylinder 12 has a double rod type piston 12 incorporated therein. However, the rod 12a protrudes from the cylinder 11 only in one direction, and the protruding portion and the outer surface of the cylinder 11 on the opposite side are provided with mounting portions 15, 16 for connecting to the seismic element or the beam-column frame.
Is provided.

The conditions for ensuring high damping and high rigidity are as follows: first, the hydraulic chamber 14 on the opposite side to the moving direction of the piston 12
Is required not to be a negative pressure. Therefore, pressure regulating valves 17a and 17b are provided in a flow path penetrating the piston 12, and the structure is such that the amount of moving oil flows directly to the hydraulic chamber 14 on the opposite side. Further, since it is necessary to compensate for the insufficient oil amount in consideration of the compression of the oil during operation, an accumulator 18 for replenishment is required, and the bypass 1 provided with the accumulator 18 is required.
9 is provided with check valves 20a and 20b.

Further , when stopped, the oil returns to the original state (expansion), so that it is necessary to return the compensated oil to the accumulator 18, and the orifices (throttles) 21a, 21b are arranged in parallel with the check valves 20a, 20b. Provided.

In addition, the features of the present apparatus are summarized as follows.

For the purpose of preventing leakage of oil to the outside and ensuring sealing properties for obtaining high damping, pressure regulating valves 17 a, 17
b is installed in the piston 12.

As the pressure regulating valves 17a and 17b, conical poppet valves are used, and a fluid resistance is set to a turbulent state to realize a temperature-independent damping characteristic.

An accumulator 18 is provided to prevent backlash and cope with oil expansion and contraction due to temperature change.

[0027] Orifices 21a, 21b are provided between the left and right hydraulic chambers 14a, 14b and the accumulator 18 to linearize the damping characteristics of the device and eliminate pressure buildup in the cylinder 11.

By increasing the sealing performance and accuracy of each part, a high damping coefficient is made possible.

With the above structure, there is no backlash, and in a state where the temperature is not affected, for example, an unprecedented high rigidity such as a holding force of 200 t and a damping coefficient of 25 to 50 t / kine,
A high attenuation device can be obtained.

FIG. 8 shows the high damping device 10 for bending deformation.
(A) schematically shows the case where the device is not installed, and (b) shows the case where the high attenuation device 10 is installed. FIG. 9 schematically shows the difference in the deformation state between the case where the high damping device 10 is installed also on the inner column 2a and the case where the device is not provided and the case where the device is not provided, in order to cope with the vertical earthquake motion. (B) is the case where the high attenuation device 10 is installed.

[0031]

According to the present invention, by setting the damping coefficient of the high damping device provided in the building to a predetermined high damping coefficient, bending of the high-rise building or building due to vertical earthquake motion depends on the arrangement position of the high damping device. As for the deformation in the vertical direction, the deformation in the column axis direction can be reduced.

Since a passive vibration control mechanism is provided, it only requires design and adjustment according to the characteristics of the structure at the time of installation, does not require a complicated control system or auxiliary equipment, and It can be installed at a lower cost than a type vibration control mechanism.

The displacement in the column axis direction of the control member provided over a plurality of floors of the building is controlled by the high damping device of the control member provided along the column. Can control well.

The control of the entire building can be performed by connecting the uppermost part and the lowermost part of the building with the control member, so that the control system is relatively simple.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is an elevation view showing an outline of a building to which the present invention is applied.

FIG. 5 is a plan view corresponding to FIG.

FIG. 6 gives the basic structure of the damping device used in the present invention .
FIG. 2 is a sectional view conceptually showing an oil damper .

FIG. 7 is a schematic explanatory diagram of the entire device in an example of an attenuation device used in the present invention.

FIG. 8 is a comparison of deformation properties when a building is subjected to a horizontal external force.
FIG. 4 is an explanatory diagram in the case where there is a damping device.

FIG. 9 is a comparison of deformation properties when a building is subjected to vertical seismic motion, and FIG.
(b) is an explanatory diagram when there is a damping device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Inside steel pipe, 2 ... Outside steel pipe, 2a ... Outer pillar, 2b ... Inner pillar, 3 ... Beam, 4, 5 ... Diaphragm, 6 ... Joint plate, 10 ... Damping device, 11 ... Cylinder, 12 ... Piston, 12a, 12b: piston rod, 13: pressure regulating valve,
14a, 14b ... hydraulic chamber, 15, 16 ... mounting part, 17 ...
Pressure regulating valve, 18: accumulator, 19: bypass, 2
0a, 20b ... check valve, 21a, 21b ... orifice

Continuation of the front page (72) Inventor Haruhiko Kurino 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (56) References JP-A-4-194180 (JP, A) JP-A-2-240341 (JP, A) JP-A-3-257268 (JP, A)

Claims (3)

(57) [Claims] An upper part and a lower part of a bar-shaped control member extending over at least a plurality of floors in a height direction of a building along a pillar of a multi-story building are connected to a part of the building. Passive type with a predetermined damping coefficient at the end
Shin made by interposing a high damping device as the device, before
The high damping device is connected to the building frame or seismic element
A cylinder body and a pin for moving within the cylinder body.
Ston and in and out of the end of the cylinder body,
Cylinder body faces fixed frame or seismic element
Piston rod connected to a moving frame or seismic element
A hydraulic chamber formed on both sides of the piston;
A plurality of flow paths penetrating the ston and communicating the two hydraulic chambers
And an accumulator provided in a bypass connecting the two hydraulic chambers.
And each of the hydraulic chambers of the bypass and the
Provided between the hydraulic chamber and the accumulator.
A pair of check valves for preventing oil from leaking out,
Orifices installed in the bypass in parallel with the check valves
And a high damping structure for controlling deformation in the column axis direction. 2. An inner steel pipe continuous in the height direction of the building is provided inside an outer steel pipe constituting an outer pillar of a multi-story building,
The inner steel tube top and bottom of connecting the top and bottom of the building, respectively, and a high damping device is interposed as a passive vibration control device which gives the predetermined attenuation coefficient during or end of the inner steel tube The high damping device is
Or the cylinder body connected to the seismic
Piston moving in the cylinder body and the cylinder
Entering and exiting from the end of the body, the cylinder body is fixed
Connect the frame or seismic element opposite the frame or seismic element.
Formed on both sides of the piston rod and the piston
Hydraulic chamber and the two hydraulic chambers penetrating the piston
And a plurality of passages for connecting the two hydraulic chambers.
An accumulator in Ipass and before the bypass
Installed between each of the hydraulic chambers and the accumulator
To prevent oil from flowing out of the hydraulic chamber.
A pair of check valves, and each of said check valves in said bypass
A high damping structure for controlling axial deformation in a column , comprising orifices provided in parallel . 3. An inner steel pipe continuous in the height direction of the building is provided inside the outer steel pipes constituting the inner pillar and the outer pillar of the multi-story building, and the uppermost part and the lowermost part of the inner steel pipe are respectively formed in the building. And a high damping device as a passive vibration damping device that gives a predetermined damping coefficient to the middle or at the end of the inner steel pipe.
A cylinder body connected to the frame or seismic element of
A piston moving in the cylinder body;
The cylinder body enters and exits from the end of the cylinder body,
Frame or seismic frame opposite to the specified frame or seismic element
A piston rod connected to the element;
A hydraulic chamber formed on the side,
A plurality of flow paths for communicating the two hydraulic chambers, and a communication between the two hydraulic chambers;
An accumulator provided in the bypass to be connected;
Each of the hydraulic chambers of the path and the accumulator
For preventing oil from flowing out of the hydraulic chamber.
A pair of check valves for
A high damping structure for controlling axial deformation in a column , comprising an orifice provided in parallel with a check valve .