JPH06346625A - Damping device for structure - Google Patents

Abstract

PURPOSE:To expand response reduction effects with respect to an earthquake and wind by providing a spring element in parallel to the action of a damping device through a pressure regulation valve to provide a construction wherein a resisting force due to rigidity can be maintained in addition to damping effects. CONSTITUTION:A cylinder type damper is provided in a frame of column and beam of a structure. A pressure regulation valve 17 is provided in a fluid passage which passes through a piston 12 and fluidly interconnects hydraulic chambers 14 provided on the opposite sides of the piston 12 to provide a specified damping coefficient (c) by designing the valve 17. A pressure regulation valve 17' may be provided in a fluid passage outside a body of a cylinder 11 instead of the valve 17. A nonlinear spring 22 is disposed between the piston 12 and the inner wall of each of the hydraulic chamber 14 in parallel to a piston rod 12a so that a resisting force can be maintained through the spring 22 by means of the rigidity thereof in addition to the damping effects of the valve 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure damping device for imparting a high damping property to the response of a structure to a vibration external force such as an earthquake or wind and reducing the vibration.

[0002]

2. Description of the Related Art A damping device enables passive type vibration control without requiring a control system such as a computer. The structure has a high damping function so that the structure is protected from disturbances such as earthquakes and winds. It is used to reduce the sway and to create a comfortable living space.

As a conventional damping device, for example, Japanese Patent Laid-Open No.
For example, there are those described in Japanese Patent Publication No.-371679.

The basic structure of a conventional damping device is as follows:
A piston that moves in the cylinder and a piston rod that comes in and out from one end of the cylinder are provided, and a pressure regulating valve is provided in a flow path that connects the hydraulic chambers on both sides of the piston.

The design of the pressure regulating valve realizes a predetermined damping coefficient c according to the vibration characteristics and the like, and by appropriately disposing the damping device having such a structure in the column / beam frame structure, a high damping property can be obtained. Can be given.

[0006]

The damping coefficient c of the damping device.
Can be set by designing the pressure regulating valve, etc., but the optimum damping coefficient for suppressing the sway of the structure varies depending on the vibration characteristics of the structure itself as well as the characteristics of individual earthquakes and wind external forces.

On the other hand, the applicants of the present application filed Japanese Patent Application No. 5-
No. 59841 proposes a high damping device for a seismic control structure having a polygonal damping coefficient in which a pressure regulating valve for giving different damping coefficients and a relief valve for coping with external force exceeding the performance of the device are combined. There is.

The present invention is intended to improve the damping device described in the section of these prior arts or the high damping device for a vibration control structure having the above-mentioned broken line type damping coefficient. By providing spring elements in parallel with respect to the operation via the structure, the structure is such that the resistance force due to the rigidity can be maintained in addition to the damping effect, and the effect of reducing the response to earthquakes and winds is expanded.

[0009]

A damping device of the present invention is a cylinder type damper device installed in a column beam frame of a structure. For example, a cylinder body is connected to a beam of a frame, and one end of the cylinder is connected to the damper body. Connect the piston rod that goes in and out to the seismic element such as brace or seismic wall.

The connection relationship between the cylinder body and the rod with respect to the frame or the seismic resistant element may be opposite to that described above, or may be installed between the seismic resistant elements in the frame to connect the seismic resistant elements together.

A pressure regulating valve is provided in a flow path communicating between the hydraulic chambers formed on both sides of the piston, and a predetermined damping coefficient c is given by this pressure regulating valve.

The pressure regulating valve is provided in a passage that penetrates the piston or a passage formed outside the cylinder body. Also,
If necessary, install a relief valve that operates at a specified pressure in parallel with the pressure regulating valve to prevent external force exceeding the performance from acting on the damping device, or combine multiple pressure regulating valves that operate at different pressures to create a multi-segment linear type It may be a damping device having a damping coefficient.

The present invention is characterized in that, in such a structure damping device, a non-linear spring is arranged in parallel with the pressure regulating valve in regard to the operation of the piston rod, and the spring element is provided in parallel. Thus, in addition to the damping effect, the resistance force due to the rigidity can be retained.

As the non-linear spring, for example, a coil spring or the like, a spring coefficient K = F / δ (F is a force acting on the spring, δ is a deformation amount of the spring) is 0 or a sufficiently small value at a predetermined deformation amount δ ₀ or less. If a spring configured as described above is used, in a range where the displacement generated in the device section is δ ₀ or less, a characteristic as a dashpot is exerted, a damping effect is added to the structure, and the displacement generated in the device unit is δ _0. In a larger range, the spring effect as well as the damping effect can be exerted to reduce the force applied to the frame of the structure.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows an embodiment of a damping device 10 of the present invention, in which a double rod type piston 12 is incorporated in a cylinder 11. In the present embodiment, the piston rod 12a projects from the cylinder 11 only in one direction, and the projecting side rod 12a and the opposite side of the cylinder 11 are provided with mounting portions 15 and 16 for connecting with a seismic element or a beam structure. ing.

The hydraulic chambers 14 on both sides penetrate the piston 12.
A pressure regulating valve 17 is provided in the flow path that communicates with each other to provide the device with a predetermined damping coefficient c. The pressure regulating valve may be provided in the flow path outside the main body of the cylinder 11, as indicated by 17 'in the figure.

In the basic structure of the damping device 10 as described above, in this embodiment, the nonlinear spring 22 is parallel to the piston rod 12a by connecting the piston 12 and the inner wall of the hydraulic chamber 14 in the hydraulic chamber 14. By arranging it, the pressure regulating valve 17
In addition to the damping effect due to, the resistance force due to rigidity can be maintained.

FIG. 2 schematically shows another embodiment of the damping device 10 of the present invention, in which the non-linear spring 22 is attached to the hydraulic chamber 1.
Instead of installing in the piston 4, flange portions 23 and 24 are formed on the mounting portion 15 side provided at the end of the piston rod 12a and the outer peripheral surface of the cylinder 11 main body, and these flange portions 23 and 24 are connected. Shape, the non-linear spring 22 is arranged parallel to the piston rod 12a.

The form of FIG. 1 has an advantage that the apparatus is compact, while the form of FIG. 2 has an advantage that a non-linear spring can be easily attached and replaced.

3 to 5 show an example of the non-linear spring 22 used in the present invention.

FIG. 3 (a) is an example of a coil spring whose diameter gradually expands. The relationship between the force F acting on the spring and the deformation amount δ of the spring is as shown in FIG. 3 (b), which exceeds δ ₀ . The rate of increase of the spring coefficient K increases in the range.

FIG. 4 (a) shows an example of a non-linear spring which is a combination of linear springs having different spring coefficients. As shown in FIG. 4 (b), δ ₀ or less has a small spring coefficient K ₁ , ₀
The spring coefficient K ₂ becomes large in a range exceeding.

FIG. 5 (a) shows the small spring coefficient K of FIG. 4 (a).
_This is equivalent to the one in which the linear spring ₁ is removed, and a spring is provided so that the spring does not function when the deformation amount is δ ₀ or less by providing a gap or the like. The spring characteristic in that case is as shown in FIG. 5 (b).

FIG. 6 shows the characteristics of the damping device in the case where the non-linear springs of FIGS. 3 to 5 are used. As shown in FIG. 6 (a), when the displacement of the device is δ ₀ or less. In addition, almost only the dashpot has the vibration characteristic, and in the range where the displacement exceeds δ ₀ , as shown in FIG. 6B, the vibration characteristic has the spring in addition to the dashpot.

As a method of utilizing such characteristics, for example, δ ₀ is set to a displacement level that occurs in the device section in the case of an earthquake of 25 kine level and a wind of 5 years of reproduction.

In FIG. 7, an inverted V-shaped brace 4 as a seismic resistant element and a damping device 10 are locally installed in a frame composed of columns 2 and beams 3 of a building 1, and the part of the building is constructed. The vibration energy is absorbed, and in this case, a characteristic of a dashpot is exerted for a 25 kine level earthquake and a wind of 5 years of reproduction, and a damping effect is added to the building 1.

With respect to an external force larger than that, a spring effect is exerted to transmit the force to the brace 4 to reduce the force applied to the frame. In particular, it is possible to reduce the shearing force of the frame due to the static external force of the wind, which cannot be reduced until now, because the brace 4 bears the large shearing force.

[0028]

EFFECTS OF THE INVENTION In the structure damping device, by disposing the non-linear spring in parallel with the pressure regulating valve, the resistance force due to the rigidity can be maintained in addition to the damping effect.

At the time of large deformation, since the spring effect is exerted and the shearing force of the frame can be applied to the brace, it is possible to reduce the shearing force of the frame against the static external force of the wind.

Since it provides a passive vibration control mechanism, 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 incidental equipment, and is active. It can be installed at a lower cost than the type vibration control mechanism.

[Brief description of drawings]

FIG. 1 is a schematic view showing a structure of a damping device according to an embodiment of the present invention.

FIG. 2 is a schematic view showing a structure of a damping device according to another embodiment of the present invention.

FIG. 3A shows an example of a non-linear spring used in the present invention, and FIG. 3B is a characteristic diagram thereof.

FIG. 4A shows another example of the non-linear spring used in the present invention, and FIG. 4B is a characteristic diagram thereof.

FIG. 5A shows still another example of the non-linear spring used in the present invention, and FIG. 5B is a characteristic diagram thereof.

6 (a) and 6 (b) are diagrams modeling the vibration characteristics of the damping device when the nonlinear springs of FIGS. 3 to 5 are used.

FIG. 7 is a schematic diagram showing the relationship between the arrangement of damping devices in a building and external forces.

[Explanation of symbols]

1 ... Building, 2 ... Pillar, 3 ... Beam, 4 ... Brace, 10 ... Damping device, 11 ... Cylinder, 12 ... Piston, 14 ... Hydraulic chamber, 15, 16 ... Mounting part, 17 ... Pressure regulating valve, 22 ... Non-linear type Spring, 23, 24 ... Flange

Front Page Continuation (72) Inventor Takayuki Mizuno 2-191-1 Tobita, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Haruhiko Kurino 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Ken Inside the corporation

Claims (2)

[Claims] 1. A cylinder, a piston that moves in the cylinder, a piston rod that moves in and out from one end of the cylinder, and hydraulic chambers formed on both sides of the piston.
In a structure damping device having a pressure regulating valve provided in a flow path communicating between the two hydraulic chambers, a non-linear spring is arranged in parallel with the pressure regulating valve in relation to the operation of the piston rod. Damping device. 2. The non-linear spring has a spring coefficient K = F / δ (F is a force acting on the spring, δ is a deformation amount of the spring) of 0 or a sufficiently small value at a predetermined deformation amount δ ₀ or less. The structure damping device according to claim 1, which is a non-linear spring.