JP2658802B2 - Structure damping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A damping device enables passive vibration control without a control system using a computer or the like. The damping device provides a structure with a high damping function, and a structure caused by a disturbance such as an earthquake or wind. It is used to reduce swaying and realize a comfortable living space.

A conventional damping device is disclosed in, for example,
-371679 and the like.

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

[0005] The design of the pressure regulating valve realizes a predetermined damping coefficient c corresponding to vibration characteristics and the like. By appropriately arranging the damping device having such a structure in a beam-column frame, it is possible to provide a structure having a high damping property. Can be given.

[0006]

SUMMARY OF THE INVENTION The damping coefficient c of the damping device
Can be set by the design of the pressure regulating valve, etc., but the optimal damping coefficient for suppressing the vibration of the structure differs depending on the characteristics of the individual earthquake or external wind force in addition to the vibration characteristics of the structure itself.

On the other hand, the applicant of the present application has filed Japanese Patent Application No.
No. 59841 proposes a high damping device for a damping structure having a linear damping coefficient in which a pressure regulating valve for giving a different damping coefficient and a relief valve for dealing with an external force exceeding the performance of the device are combined. I have.

The present invention is an improvement of the damping device described in the section of the prior art or the high damping device for a damping structure having the above-mentioned broken-line damping coefficient. By providing a spring element in parallel with the intervening operation, a structure capable of holding a resistance force due to rigidity in addition to the damping effect is provided, and the purpose is to expand the effect of reducing the response to earthquakes and winds.

[0009]

The damping device according to 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 the frame, and the damper device is connected to one end of the cylinder. The incoming and outgoing piston rod is connected to the side of the seismic element such as a brace or a shear wall.

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

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

The pressure regulating valve is provided in a flow path penetrating the piston or a flow path formed outside the cylinder body. Also,
If necessary, a relief valve that operates at a predetermined pressure is provided in parallel with the pressure regulating valve to prevent external force exceeding the performance from acting on the damping device, or a multi-fold linear type by combining multiple pressure regulating valves that operate at different pressures A damping device having a damping coefficient may be used.

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

As a non-linear spring, for example, a coil spring or the like, a spring coefficient K = F / δ (F is the force acting on the spring, and δ is the amount of deformation of the spring) is 0 or a sufficiently small value at a predetermined deformation amount δ ₀ or less. When the spring is used, when the displacement generated in the device section is equal to or less than δ ₀ , the characteristic as a dash pot is exerted to add a damping effect to the structure, and the displacement generated in the device section is δ _0. In a larger range, a spring effect is exhibited in addition to the damping effect, so that the force applied to the frame of the structure can be reduced.

[0015]

FIG. 1 schematically shows an embodiment of a damping device 10 according to the present invention, in which a double rod type piston 12 is incorporated in a cylinder 11. In this embodiment, the piston rod 12a protrudes from the cylinder 11 in only one direction, and mounting portions 15, 16 for connecting to the seismic element or the beam-column frame are provided on the protruding side of the rod 12a and on the opposite side of the cylinder 11. ing.

Hydraulic chambers 14 on both sides passing through piston 12
A pressure regulating valve 17 is provided in a flow path that communicates with the device, and gives a predetermined damping coefficient c to the device. Incidentally, the pressure regulating valve may be provided in a flow path outside the cylinder 11 main body as shown by 17 'in the figure.

In the basic configuration of the damping device 10 as described above, in this embodiment, a non-linear spring 22 is connected in parallel with the piston rod 12a in the hydraulic chamber 14 so as to connect the piston 12 and the inner wall of the hydraulic chamber 14. By arranging, the pressure regulating valve 17
In addition to the damping effect by the stiffness, the resistance force by the rigidity can be maintained.

FIG. 2 schematically shows another embodiment of the damping device 10 according to the present invention.
Instead of being installed inside the cylinder rod 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, respectively, and these flange portions 23 and 24 are connected. The non-linear spring 22 is arranged in parallel with the piston rod 12a.

The type shown in FIG. 1 has the advantage of making the apparatus compact, while the type shown in FIG. 2 has the advantage that the non-linear spring can be easily attached and replaced.

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

[0021] FIGS. 3 (a) is an example of a coil spring whose diameter gradually widened, the relationship between the force F and the amount of deformation of the spring [delta] acting on spring look like in FIG. 3 (b), beyond the [delta] ₀ The rate of increase of the spring coefficient K increases within the range.

FIG. 4 (a) is an example of a non-linear spring with a combination of different linear spring having a spring coefficient, has a smaller spring constant K ₁ in the [delta] ₀ or less as shown in FIG. 4 (b), [delta] ₀
A large spring coefficient K ₂ in a range beyond the.

FIG. 5 (a) shows the small spring coefficient K of FIG. 4 (a).
Corresponds to that removed _one of the linear spring, and the like provide a gap relates mounting of the spring, a variation amount [delta] ₀ or less is obtained by such a spring does not work. The spring characteristics in that case are as shown in FIG.

FIG. 6 shows the characteristics of the damping device when the non-linear springs shown in FIGS. 3 to 5 are used. When the displacement in the device is δ ₀ or less, as shown in FIG. , most become vibration characteristics of dashpot alone, in the range where the displacement is greater than [delta] _0, as shown in FIG. 6 (b), the vibration characteristics having both the spring in addition to the dashpot.

As a method of utilizing such a characteristic, for example, δ ₀ is set to a degree of displacement occurring in the device section in the event of an earthquake of 25 kine levels and a wind of five years of reproduction.

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

With respect to a further external force, the effect of the spring is also exerted to transmit the force to the brace 4, thereby reducing the force applied to the frame. In particular, it becomes possible to reduce the shearing force of the frame due to the static external force of the wind that could not be reduced by the brace 4 during large deformation.

[0028]

[Effect of the Invention] In the structure damping device, by arranging the non-linear spring in parallel with the pressure regulating valve, it is possible to maintain a resistance force due to rigidity in addition to the damping effect.

At the time of large deformation, a spring effect is also exerted so that the shear force of the frame can be borne by the brace. Therefore, the shear force of the frame can be reduced even against static external wind force.

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 ancillary equipment, and is active. It can be installed at a lower cost than a type vibration control mechanism.

[Brief description of the drawings]

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

FIG. 2 is a schematic diagram 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 another example of the non-linear spring used in the present invention, and FIG. 5B is a characteristic diagram thereof.

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

FIG. 7 is a schematic diagram showing a relationship between an arrangement of a damping device and an external force in a building.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Building, 2 ... Column, 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 Spring, 23, 24 ... Flange part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Takayuki Mizuno, Inventor, Kashima Construction Co., Ltd. 2-191-1, Tobita-Shi, Chofu-shi, Tokyo (72) Inventor Haruhiko Kurino 1-2-1, Moto-Akasaka, Minato-ku, Tokyo 7 Kashima Construction Co., Ltd.

Claims (2)

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