JP2001059359A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively absorb the vibration energy of an earthquake by providing springs energizing piston rods in the contracting direction at all times to dampers on diagonal braces erected between two sets of joint parts positioned on diagonal lines mutually. SOLUTION: Diagonal braces connecting extendable dampers 10A, 10B with springs and rods 11A, 11B in series are fitted between two sets of support plates 6, 6 in the diagonal relation in intersections between column materials 1 and beam materials 2. When a structure is inclined and for example, one extendable damper 10A with the spring is extended, a piston 13 slides in a cylinder 12 while contracting a tension spring 33, operating fluid in an oil chamber 19 opens a damping valve 28 via an oil passage 27 to reach the oil chamber 18, and the damper 10A generates an damper force along with the tension spring 33 to fulfill as a vibration control function in the extending direction of the structure by the rod 11A. Then, the piston 13 and the piston rod 14 of the other damper 10B are prevented from receiving the contraction force from the rod 11B, etc., so as to avoid the twisting force and buckling. This device can thus effectively absorb the vibration energy of the structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control device for improving the seismic strength of a building structure or the like.

[0002]

2. Description of the Related Art Conventionally, as a countermeasure for increasing the seismic strength of a building structure, as shown in FIG. A brace consisting of two rods 4A and 4B connected by turnbuckles 3A and 3B is attached between the two sets of joints.

[0003] A bracket 5 is integrally provided at each end of the rods 4A and 4B, and a support pin 7 is provided on a support plate 6 which is a triangular gusset provided at each of the joints. It is pivotally supported via the shaft.

On the other hand, the above-mentioned turnbuckles 3A, 3B
Is a pair of opposing positions of the square frame member with respect to the screws j, k cut in opposite directions at the respective separated ends of the rods 4A, 4B, each of which is made of a rigid rigid frame member. And screwed in as shown in FIG.

A torque hole 1 is formed at the opposite position of the other pair, and a steel rod or the like is inserted into the hole, and the screws j and k are tightened by manually rotating the steel rod. Thus, a predetermined tension can be applied to each of the rods 4A and 4B.

Accordingly, when the turnbuckles 3A and 3B are used together with the rods 4A and 4B, respectively, when the beam-column frame is inclined rightward as shown in FIG. A strong tension acts on the brace and functions to suppress the inclination, while, as shown in FIG.
When the column-beam frame is tilted to the left, a strong tension acts on the braces on the rod 4B side, and functions to suppress the tilt to the left.

Further, a vibration damping device as shown in FIG. 10 in which the seismic strength of a building structure is further increased has been provided.

[0008] This is a stretchable damper as a damper between support plates 6 and 6 provided at two sets of diagonal joints at the intersection of the column 1 and the beam 2 of the structure. 8A and 8B and braces 9A and 9B with a brace connected in series.

[0009] In this case, the dampers 8A and 8B, which are effective for elongation, are used.
A bracket 5 is provided integrally with the end and the ends of the braces 9A and 9B. The bracket 5 is rotatably supported on each support plate 6 via a support pin 7.

In such a vibration damping device, each brace 9
Since the stretchable dampers 8A and 8B are connected in series to A and 9B, respectively, one stretchable damper 8A expands while generating a damping force, for example, according to the inclination of the structure as described above. Meanwhile, the other stretch-effective damper 8B contracts in a no-load state, so that the structure is damped using the damping force.

[0011]

However, among the conventional vibration damping devices shown in FIGS. 6 to 10, the rods 4A and 4B are used only as tensile strength members. Therefore, not only can the vibration (reciprocating motion) energy of the earthquake be absorbed, but also if the force is applied in the contraction direction, that is, if the force in the compression direction acts on the rods 4A and 4B, the rods 4A and 4B themselves are not used. However, there is a problem that the rods 4A and 4B are damaged when the interlayer deformation of the structure is large, that is, at the time of a large earthquake, and the vibration damping effect cannot be obtained at all.

On the other hand, the elongating dampers 8A and 8A shown in FIG.
In the vibration damping device using 8B, although the vibration damping effect at the time of elongation can be expected, when the damper 8A, 8B contracts due to the external force from the above structure at the time of contraction, the damper 8A at the time of elongation contracts. , 8B must withstand the compressive force caused by the sliding resistance of the piston with respect to the cylinder and the unbalanced load received from the out-of-plane direction. Therefore, the braces 9A, 9B for increasing the rigidity of the braces 9A, 9B are required.
There is a problem that the diameter and size of B itself must be increased.

SUMMARY OF THE INVENTION The present invention solves the above-described problems, and provides a desired damping effect by generating a damping force when the brace is extended, and buckling deformation or breakage of the rod or the like during compression. While effectively absorbing the shaking energy of the earthquake while preventing the piston from sliding against the cylinder that composes the damper, and twisting due to out-of-plane uneven loads without increasing the brace diameter. An object is to provide a vibration damping device that can be avoided.

[0014]

In order to achieve the above object,
One means according to the present invention is to form a column-beam frame with at least two column members standing vertically and at least two upper and lower beam members erected between the column members, A damping device in which a bracing in which a rod and a damper are connected in series is installed between two sets of joining portions on a diagonal line among joining portions where the material intersects, and a piston rod is always provided on the damper. A spring is provided that urges in the compression direction, thereby generating a damping force when the damper is extended and absorbing the swing energy due to an earthquake or the like. The body does not receive compression force directly.

In this case, a turnbuckle may be interposed between the rod and the damper to set the initial tension of the brace.

Similarly, at least two pillars standing in the vertical direction and at least two upper and lower beams provided between the pillars constitute a pillar-column frame, and the pillars intersect with the beams. A brace that connects a wire and a damper in series between two sets of diagonal joints of the joints is erected, and the damper is provided with a spring that constantly urges the piston rod in the compression direction. In addition, when the damper contracts due to the compressive action of the structure, the wire is immediately slackened so that the compressive force does not directly act on the damper body.

In this case, a turnbuckle may be interposed between the wire and the damper to set the initial tension of the brace.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing a vibration damping device of the present invention, and a column constituting a beam-column frame of a structure. Lumber 1
A triangular support plate 6 is provided at each intersection with the intersection of the beam member 2 and the intersection between the two and a pair of support plates 6 and 6 in a diagonal relationship with each other. 10A, 10B and rod 11A,
11B is connected in series.

Each spring-elongated damper 10A with a spring,
Brackets 5 are integrally provided at the end of 10B and the ends of rods 11A and 11B, and these brackets 5 are rotatably supported by support plates 6 via support pins 7.

FIG. 2 is a sectional view showing the basic structure of each of the above-described spring-elongated dampers 10A and 10B with springs.
This is a cylinder 12, a piston 13 which slides inside the cylinder 12 to generate pressure, and a piston which has the piston 13 at its tip and which penetrates one end of the cylinder 12 through a seal 15 to receive a load. And a rod 14.

The other end of the cylinder 12 and the end of the piston rod 14 are connected to the rods 11A and 11A, respectively.
Mounting portions 16 and 17 connected to the support plate 1B and the support plate 6 are provided.

If necessary, the cylinder 12 and the piston rod 14 may be directly connected to the rods 11A and 11B without providing the mounting portions 16 and 17. It is also optional to make the piston rod 14 a part of the brace.

The inside of the cylinder 12 is separated into two oil chambers 18 and 19 by a piston 13, and a free piston 21 supported by a spring 20 is provided in the cylinder 12. The oil chamber 18 and the air chamber 22 on the spring 20 side
Is segregated.

The free piston 21 performs volume compensation by the stroke of the piston rod 14. A seal 23 is provided on the outer peripheral surface of the free piston 21.

The piston 13 is provided with one or a plurality of check valves 25 for releasing the pressure by opening the orifice 24 during the compression stroke of the piston rod 14.

The check valve 25 is urged toward the orifice 24 by a spring 32.

The piston rod 14 is provided with a valve chamber 26 opening at one end thereof and an oil passage 27 having one end communicating with the valve chamber 26 and the other end opening toward the oil chamber 19. .

In the valve chamber 26, there is provided a damping valve 28 for opening and closing one open end of an oil passage 27 facing the valve chamber 26. The damping valve 28 has an oil passage hole for closing the opening of the valve chamber 26. A spring 30 supported by a spring retainer 29 with a spring 31 urges the oil passage 27 in a direction to close the open end of the oil passage 27 at a constant pressure.

In the oil chamber 19, the piston 13 is always urged together with the piston rod 14 in the compression direction, that is, in the direction in which the free piston 21 is located in the drawing, so that a constant tension is applied to the rods 11A and 11B. Is provided.

In the vibration damping device having such a configuration, when the structure in which an earthquake does not occur is stationary, the tension springs 33 incorporated in the spring-equipped dampers 10A and 10B are applied to the rods 11A and 11B. Has a constant tension.

Here, when the structure is tilted to the right as in the case shown in FIG. 8, the spring-equipped damper 10A is extended.

That is, by this extension operation, the piston 13 slides in the cylinder 12 while compressing the tension spring 33, and the hydraulic oil in the oil chamber 19 passes through the oil passage 27 provided in the piston rod 14. Pushes the damping valve 28 open.

Further, the hydraulic oil passes through the oil passage 31 of the valve chamber 26 and the spring retainer 29 and reaches the oil chamber 18, and the stretchable damper 10 A with spring generates a damping force together with the tension spring 33. The rod 11A performs a vibration damping function in the extension direction of the structure.

On the other hand, at this time, the other spring-elongated damper 10B with a spring receives a force in the compression direction from the structure, but the check valve 25 is quickly actuated by the generation of pressure in the oil chamber 18 when receiving the force in the compression direction. Orifice 24
Is opened to prevent the pressure in the oil chamber 18 from rising, the load is not applied, and at the same time, the piston 13 immediately moves in the compression direction, that is, the free piston 21 in the cylinder 12, in the direction in which the free piston 21 is contracted.

Therefore, the piston 13 and the piston rod 14 do not receive a compressive force from the rod 11B of the external structure or the like, and also have a frictional sliding resistance and a twisting force due to an uneven load from the out-of-plane direction. Generation and buckling can be avoided beforehand.

As a result, it is not necessary to increase the rigidity of the rod 11B, and a rod having a small diameter capable of withstanding a pulling force can be used.

When the structure is tilted as shown in FIG. 9, for example, the same operation is performed. In addition to the desired vibration damping effect, the anti-buckling function and the anti-buckling function at the time of compression are obtained. The function of preventing the piston from being twisted with respect to the cylinder is obtained.

During the compression operation of the piston rod 14, the free piston 21 is moved by the spring 2 so as to compensate for the volume of the stroke of the piston rod 14.
It will move against 0.

The damping valve 28 may have any well-known relief valve construction, and the same damping force as that of the damping valve is generated by using an orifice that is easily machined in place of the damping valve 28. You can also.

It is optional to use a combination of a relief valve and an orifice.

The damping valve 28 is connected to the piston rod 14
The check valve 25 may be provided inside the piston 13 as shown in the drawing, or may be provided inside the piston 13 or the piston rod 14 without being provided inside the piston 13.

Further, the example in which the free piston 21 is provided in the cylinder 12 has been described above. However, when the spring-elongated dampers 10A and 10B are installed obliquely as shown in FIG. When the is installed obliquely downward, as shown in FIG. 3, the oil chamber 18 side, which is a low-pressure chamber, can also be used as an air chamber, and the use of the free piston 21 can be omitted.

FIG. 4 shows a turnbuckle 3A, similar to that shown in FIG. 7 in the middle of the rods 11A, 11B.
4A is shown in series.

According to this, the turnbuckles 3A, 4A
Rotational operation of the spring effect damper 1 with each spring
The setting and application of the initial tension to 0A and 10B can be facilitated.

FIG. 5 shows another embodiment according to the present invention, which uses spring-elongated dampers 8A and 8B with springs as shown in FIGS. , 3B with wires 34A, 34B
Are connected in series to each other and connected between the support plates 6 and 6 at diagonal positions.

In this embodiment, as for the extension operation of the damper body, the seismic energy is absorbed in the same manner as described above.
During the compression operation, the wires 34A and 34B themselves are immediately tensioned by the spring force, so that the dampers 8A and 8
It is possible to prevent deformation and buckling of the B and the turnbuckles 3a and 3b, thereby facilitating the assembling work, and reducing material costs and assembling work.

[0047]

According to the present invention, the following effects can be obtained.

According to the first and second aspects of the present invention, at least two pillars standing in the vertical direction and at least two upper and lower beams provided between the pillars constitute a pillar-column structure. A damping device having a brace connecting a rod and a damper in series between two sets of diagonally joined joints of a joint where a column material and a beam material intersect, wherein the damper has A spring that constantly urges the piston rod in the compression direction is provided, so that the swing energy of the structure can be efficiently absorbed, and the deformation and buckling of the rod and damper body due to external force, especially during compression, can be reliably prevented. The effect is obtained.

According to the third and fourth aspects of the present invention, at least two pillars standing in the vertical direction and at least two upper and lower beams provided between the pillars constitute a pillar-beam frame structure. Of the joints where the column material and the beam material intersect, a brace that connects a wire and a damper in series is installed between two sets of diagonal joints, so the internal structure of the cylinder is complicated. Without damaging the structure, it is possible to reliably prevent the damper from being deformed, buckled, or damaged by the deformation of the structure.

According to the second or third aspect of the invention, by connecting the turnbuckle to the rod or wire in series,
The effect of facilitating the setting of the initial tension for these rods and wires can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view showing an internal structure of a stretchable damper with a spring in FIG.

FIG. 3 is a cross-sectional view showing another embodiment of a stretchable damper with a spring according to the present invention.

FIG. 4 is a configuration diagram showing a vibration damping device according to another embodiment of the present invention.

FIG. 5 is a configuration diagram showing a vibration damping device according to another embodiment of the present invention.

FIG. 6 is a configuration diagram showing a conventional vibration damping device.

FIG. 7 is a front view showing the turnbuckle in FIG. 6;

FIG. 8 is an explanatory diagram showing a deformation state of a conventional vibration damping device due to an earthquake.

FIG. 9 is an explanatory diagram showing a deformation state of a conventional vibration damping device due to an earthquake.

FIG. 10 is a configuration diagram showing another conventional vibration damping device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Column material 2 Beam material 3A, 3B Turnbuckle 8A, 8B Damper (expansion effective damper) 10A, 10B Damper (extension effective damper with spring) 11A, 11B Rod 12 Cylinder 13 Piston 14 Piston rod 33 Spring for tension 34A, 34B Wire

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Osamu Takahashi 4-38-13 Honcho, Nakano-ku, Tokyo F-term in the Structural Planning Research Institute, Inc. (reference) 2E002 FB11 FB15 HA02 HB02 HB14 HB16 JA01 JA02 JB02 JB14 JB16 LA03 LB09 LC02 MA11 MA12 3J069 AA53 CC13 EE02

Claims (4)

[Claims] At least two pillars standing vertically and at least two upper and lower beams provided between the pillars constitute a pillar-to-column frame, and the pillars intersect with the beams. In a vibration damping device having a brace in which a rod and a damper are connected in series between two sets of diagonal joints of the joints, the piston rod is always urged in the compression direction by the damper. A vibration damping device characterized by comprising a spring that performs the vibration control. 2. The vibration damping device according to claim 1, wherein a turnbuckle is interposed between the rod and the damper to set the initial tension of the brace. 3. A column-beam frame comprising at least two column members standing vertically and at least two upper and lower beam members provided between the column members, and the column members intersect with the beam members. A brace where a wire and a damper are connected in series is erected between two sets of diagonal joints of the joints, and the damper is provided with a spring which constantly urges a piston rod in a compression direction. Characteristic damping device. 4. The vibration damping device according to claim 3, wherein an initial tension of the brace is set by interposing a turnbuckle between the wire and the damper.