JP3931289B2 - Vibration control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration damping device for increasing seismic strength of a building structure or the like.
[0002]
[Prior art]
Conventionally, as a measure to increase the seismic strength of a building structure, as shown in FIG. 6, two pairs of joints that are diagonal to each other, with the intersection of the column 1 and the beam 2 as a joint as shown in FIG. A brace composed of two rods 4A and 4B each connected by turnbuckles 3A and 3B is attached.
[0003]
A bracket 5 is integrally provided at each end of the rods 4A and 4B, and the bracket 5 is provided at each joint, for example, by a support plate 6 which is a triangular gusset via a support pin 7. It is pivotally supported.
[0004]
On the other hand, the turnbuckles 3A and 3B are made of a highly rigid square frame member, and are connected to screws j and k cut in opposite directions at the separated ends of the rods 4A and 4B separated into two pieces, respectively. 7 and are screwed at a pair of opposing positions of the square frame member as shown in FIG.
[0005]
In addition, a torque hooking hole l is formed at the opposite position of the other pair, and a screw such as a steel rod is inserted into this, and the screws j and k can be tightened by manually rotating the steel rod. As a result, a predetermined tension can be applied to each rod 4A, 4B.
[0006]
Therefore, when the turnbuckles 3A and 3B are used together with the rods 4A and 4B, respectively, when the column beam frame is inclined to the right as shown in FIG. 8, for example, it is strong against bracing on the rod 4A side. On the other hand, when the column beam frame is tilted to the left as shown in FIG. 9, a strong tension acts on the bracing on the rod 4B side and the left side of the column 4B side acts. It functions to suppress the tilt in the direction.
[0007]
In addition, a vibration damping device as shown in FIG. 10 in which the seismic strength of the building structure is further increased is provided.
[0008]
This is because the extension effect dampers 8A and 8B as dampers are provided between the support plates 6 and 6 provided in the two pairs of joints on the diagonal line with the intersection of the column 1 and the beam 2 of the structure as a joint. And braces 9A and 9B are attached in series.
[0009]
Here, brackets 5 are integrally provided at the ends of the dampers 8A and 8B and the braces 9A and 9B, and the brackets 5 are pivotally supported by the support plates 6 via the support pins 7. Yes.
[0010]
In such a vibration damping device, the extension dampers 8A and 8B are connected in series to the braces 9A and 9B, respectively. Therefore, for example, one extension damper 8A is provided according to the inclination of the structure as described above. While the damping force is generated, the other stretchable damper 8B contracts in an unloaded state, and thus the structure is damped using the damping force.
[0011]
[Problems to be solved by the invention]
However, among such conventional vibration damping devices, those shown in FIGS. 6 to 10 have a structure in which the rods 4A and 4B are used only as tensile strength members. In addition to not being able to absorb energy, when a force is applied in the contraction direction, that is, when a force in the compression direction is applied to the rods 4A and 4B, the rods 4A and 4B themselves are buckled and deformed. When the inter-layer deformation of the object is large, that is, at the time of a large earthquake, the rods 4A and 4B are damaged, and there is a problem that the vibration control effect cannot be obtained at all.
[0012]
On the other hand, in the vibration damping device using the elongation effective dampers 8A and 8B shown in FIG. 10, the vibration damping effect at the time of expansion can be expected, but at the time of contraction, the elongation effective damper 8A receives the external force from the structure. , 8B must be able to withstand the compressive force caused by the twisting force generated by the sliding resistance of the piston against the cylinder and the offset load received from the out-of-plane direction when the dampers 8B, 8B are contracted. There is a problem that the braces 9A and 9B themselves for increasing the rigidity of the brace 9 must be increased in diameter and size.
[0013]
The present invention solves the above-described problems, and generates a damping force by generating a damping force when the brace extends, and prevents buckling deformation and breakage of the rod during compression. However, it is possible to effectively absorb the vibration energy of earthquakes, and to avoid the sliding resistance of the piston with respect to the cylinder that constitutes the damper and the twisting due to the eccentric load from the out-of-plane direction without increasing the brace diameter. An object is to provide a vibration device.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, one means according to the present invention is to form a column beam frame by at least two column members standing in the vertical direction and at least two beam members arranged between the column members. and, Oite vibration damping device which is bridged bracing which connects the rod and the damper in series between two sets of joints in the diagonal to each other among the joints and the pillar and beam members intersect, the The damper includes a cylinder, a piston rod slidably inserted into the cylinder via a piston, a rod-side oil chamber and an anti-rod-side oil chamber separated via a piston in the cylinder, and a piston or piston rod. A check valve that allows oil flow from the non-rod side oil chamber to the rod side oil chamber during compression, and a passage that is provided on the piston or piston rod and communicates the rod side oil chamber and the anti-rod side oil chamber And this passage A damping valve, a relief valve, or a damping force generating mechanism that generates a damping force when extended, and a spring that constantly urges the piston rod in the compression direction in the rod-side oil chamber Is provided.
[0015]
In this case, a turn buckle may be interposed between the rod and the damper to set the initial tension for bracing.
[0016]
Similarly, the other means comprises a column beam frame composed of at least two column members standing in the vertical direction and at least two upper and lower beam members erected between the column members. In the vibration damping device in which a brace is constructed by connecting a wire and a damper in series between two pairs of diagonally joined joints , the damper includes a cylinder and a piston in the cylinder. A piston rod slidably inserted through the rod, a rod-side oil chamber and an anti-rod-side oil chamber separated via a piston in the cylinder, and an anti-rod-side oil chamber provided in the piston or piston rod when compressed A check valve that allows the flow of oil from the rod side oil chamber to the rod side, a passage that is provided in the piston or piston rod and connects the rod side oil chamber and the anti-rod side oil chamber, and is provided in the middle of this passage. Decrease when expanding It is composed of a damping valve, a relief valve, or a damping force generating mechanism consisting of an orifice that generates force, and a spring that constantly biases the piston rod in the compression direction is provided in the rod side oil chamber. .
[0017]
In this case, a turn buckle may be interposed between the wire and the damper to set the initial tension for bracing.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram illustrating a vibration damping device according to the present invention, in which a column member 1 and a beam member 2 constituting a column beam frame of a structure Triangular support plates 6 are provided at the intersections at the intersections, and between the two support plates 6 and 6 that are in a diagonal relationship with each other, extension dampers 10A and 10B with springs as a damper and rods The brace which connected 11A and 11B in series is attached.
The dampers 10 </ b> A and 10 </ b> B include a cylinder 12, a piston rod 14 slidably inserted into the cylinder 12 via the piston 12, and a rod-side oil chamber separated within the cylinder 12 via the piston 13. 19 and the anti-rod side oil chamber 18, and the check valve 25 that is also received by the piston 13 and allows oil to flow from the anti-rod side oil chamber 18 to the rod side oil chamber 19 during compression, and also received by the piston rod 14. And a passage composed of an oil passage 27, a valve chamber 26, and an oil passage hole 31 communicating with the rod side oil chamber 19 and the anti-rod side oil chamber 18, and provided in the middle of the passage to generate a damping force when extended. And a damping valve 28 to be operated.
Further, a spring 33 is provided in the rod-side oil chamber 19 to constantly urge the piston rod 14 in the compression direction.
This will be described in more detail below.
[0019]
Brackets 5 are integrally provided at the ends of the extension dampers 10A, 10B with springs and the rods 11A, 11B, and these brackets 5 are pivotally supported by the support plates 6 via support pins 7. ing.
[0020]
FIG. 2 is a cross-sectional view showing the basic structure of each of the above-described extension dampers 10A, 10B with a spring. This is a cylinder 12, a piston 13 that slides in the cylinder 12 to generate pressure, and the piston 13 And a piston rod 14 that passes through one end of the cylinder 12 through a seal 15 and receives a load.
[0021]
Further, the other end of the cylinder 12 and the end of the piston rod 14 are provided with mounting portions 16 and 17 connected to the rods 11A and 11B and the support plate 6, respectively.
[0022]
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 part of the bracing.
[0023]
The cylinder 12 is divided 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. A chamber 18 and an air chamber 22 on the spring 20 side are separated.
[0024]
The free piston 21 performs volume compensation by the stroke of the piston rod 14, and a seal 23 is provided on the outer peripheral surface of the free piston 21.
[0025]
The piston 13 is provided with a single 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.
[0026]
The check valve 25 is urged toward the orifice 24 by a spring 32.
[0027]
Further, the piston rod 14 is provided with a valve chamber 26 opened at an end thereof, and an oil passage 27 having one end communicating with the valve chamber 26 and the other end opened toward the oil chamber 19.
[0028]
A damping valve 28 for opening and closing one opening end of an oil passage 27 facing the valve chamber 26 is provided in the valve chamber 26, and the damping valve 28 has an oil passage hole 31 for closing the opening of the valve chamber 26. The spring 30 supported by the spring retainer 29 is urged in a direction to close the opening end of the oil passage 27 with a constant pressure.
[0029]
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 drawing, the direction in which the free piston 21 is present to apply a constant tension to the rods 11 </ b> A and 11 </ b> B. A tension spring 33 which is a spring is provided.
[0030]
In the vibration damping device having such a configuration, when the structure where no earthquake occurs is stationary, the rods 11A and 11B are fixed to the rods 11A and 11B by the tension springs 33 incorporated in the spring-loaded extension dampers 10A and 10B. Tension is applied.
[0031]
Here, when the structure is inclined to the right as in the case shown in FIG. 8, the stretchable damper 10A with a spring extends.
[0032]
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 an oil passage 27 provided in the piston rod 14 and is a damping valve. 28 is pushed open.
[0033]
Further, the hydraulic oil passes through the valve chamber 26 and the oil passage hole 31 of the spring retainer 29 and reaches the oil chamber 18, and the spring-loaded extension damper 10A generates a damping force together with the tension spring 33, and is generated by the rod 11A. Performs vibration control in the direction of structure extension.
[0034]
On the other hand, at this time, the other stretchable damper 10B with a spring receives a force in the compression direction from the structure, and the check valve 25 promptly causes the orifice 24 due to generation of pressure in the oil chamber 18 when receiving the force in the compression direction. And the pressure inside the oil chamber 18 is prevented from increasing, and a no-load state is established. The piston 13 quickly moves through the cylinder 12 in the compression direction, that is, in the direction in which the free piston 21 is located and contracts.
[0035]
For this reason, the piston 13 and the piston rod 14 do not receive the compressive force from the rod 11B of the external structure, and the generation of the twisting force due to the frictional sliding resistance and the offset load from the out-of-plane direction. The occurrence of buckling can be avoided in advance.
[0036]
As a result, it is not necessary to increase the rigidity of the rod 11B, and a rod having a small diameter that can withstand the pulling force can be used.
[0037]
In contrast to the above, for example, when the structure is tilted as shown in FIG. 9, the same operation is performed. In addition to the desired vibration damping effect, the anti-buckling function during compression and the piston cylinder A function to prevent twisting is obtained.
[0038]
During the compression operation of the piston rod 14, the free piston 21 moves against the spring 20 so as to compensate for the stroke volume of the piston rod 14.
[0039]
The damping valve 28 may have any well-known relief valve configuration, and by using an orifice that can be easily processed instead of the damping valve 28, a damping force similar to that of the damping valve can be generated. .
[0040]
A relief valve and an orifice may be used in combination.
[0041]
In addition, the damping valve 28 is not provided in the piston rod 14 but can be incorporated in the piston, and the check valve 25 is provided in contact with the piston 13 as shown in the figure. 14 is also optional.
[0042]
Furthermore, the example in which the free piston 21 is provided in the cylinder 12 has been described above. However, when the extension dampers 10A and 10B with springs are attached obliquely as shown in FIG. 1, that is, the piston rod 14 is inclined downward. In this case, as shown in FIG. 3, the oil chamber 18 side which is a low pressure chamber can be used also as an air chamber, and the use of the free piston 21 can be omitted.
[0043]
FIG. 4 shows a structure in which turnbuckles 3A and 4A similar to those shown in FIG. 7 are interposed in series in the middle of the rods 11A and 11B.
[0044]
According to this, by setting the turnbuckles 3A and 4A, the initial tension can be easily set and applied to the extension dampers 10A and 10B with springs.
[0045]
FIG. 5 shows another embodiment of the present invention, which uses spring-loaded extension dampers 8A and 8B as shown in FIGS. 1 to 4, and this is used together with turnbuckles 3A and 3B. The wires 34A and 34B are connected in series, and are connected between the support plates 6 and 6 at diagonal positions.
[0046]
In this embodiment, the extension operation of the damper body absorbs seismic energy in the same manner as described above. However, during the compression operation, the wires 34A and 34B themselves are immediately subjected to tension by the spring force, so the extension dampers 8A and 8B and the turn The buckles 3A and 3B can be prevented from being deformed, buckled , and the like, facilitating the assembling work, and reducing the material cost and the assembling work.
[0047]
【The invention's effect】
The present invention has the following effects.
[0048]
According to the inventions of claims 1 and 2, a column beam frame is constituted by at least two column members standing in the vertical direction and at least two upper and lower beam members erected between the column members, In the vibration control device in which the brace is constructed by connecting the rod and the damper in series between the two joints diagonal to each other in the joint where the beam intersects , the damper always compresses the piston rod in the compression direction. And a damping force generation mechanism that generates a damping force during extension operation.When an earthquake occurs on the structure and the damper receives a force in the extension direction, the spring is compressed. A damping force generation mechanism with a spring generates a damping force to exert a damping function, and can efficiently absorb the shaking energy of the structure.
Conversely, when the damper receives a force in the compression direction due to an earthquake, the check valve opens and puts the oil chamber on the non-rod side into a no-load state and the spring urges the piston in the compression direction to cause the rod to contract. It is possible to prevent the generation of compressive force against the rod, and to reliably prevent deformation and buckling due to external forces such as the rod and damper body.
As a result, there is no need to increase the rigidity of the rod, and a rod having a small diameter that can withstand the pulling force can be used.
[0049]
According to the third and fourth aspects of the present invention, a column beam frame is constituted by at least two column members standing upright in the vertical direction and at least two upper and lower beam members erected between the column members, and the column member Since the brace that connects the wire and the damper in series is installed between two pairs of joints that are diagonal to each other in the joint where the beam and the beam intersect, the internal structure of the cylinder is complicated. In addition, it is possible to reliably prevent the damper from being deformed, buckled, or damaged due to the deformation of the structure.
Since the damper includes a spring that constantly urges the piston rod in the compression direction and a damping force generation mechanism that generates a damping force during the extension operation, an earthquake occurs on the structure and the damper generates a force in the extension direction. When received, the spring is compressed, and the damping force generation mechanism generates a damping force together with this spring to exhibit a damping function, and can efficiently absorb the shaking energy of the structure.
On the other hand, when the damper receives a force in the compression direction due to an earthquake, the check valve opens and puts the oil chamber on the non-rod side into a no-load state, and the spring urges the piston in the compression direction to cause a contraction operation. Immediately receives tension by the spring force, and can prevent the damper or the damper and turnbuckle from being deformed or buckled.
[0050]
(3) According to the invention of claim 2 or 3, the effect of facilitating the setting of the initial tension for these rods and wires can be obtained by connecting the turnbuckles to the rods and wires in series.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a vibration damping device according to an embodiment of the present invention;
2 is a cross-sectional view showing the internal structure of an extension damper with a spring in FIG. 1. FIG.
FIG. 3 is a cross-sectional view showing another embodiment of an extension damper with a spring according to the present invention.
FIG. 4 is a block diagram showing a vibration damping device according to another embodiment of the present invention.
FIG. 5 is a block diagram showing a vibration damping device according to another embodiment of the present invention.
FIG. 6 is a block diagram showing a conventional vibration damping device.
7 is a front view showing the turnbuckle in FIG. 6. FIG.
FIG. 8 is an explanatory view showing a deformation state of a conventional vibration damping device due to an earthquake.
FIG. 9 is an explanatory view 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]
1 Column 2 Beam 3A, 3B Turnbuckle 8A, 8B Damper (Elongation Damper)
10A, 10B damper (elongation damper with spring)
11A, 11B Rod 12 Cylinder 13 Piston 14 Piston rod 33 Tension springs 34A, 34B Wire

Claims (4)

At least two column members standing in the vertical direction and at least two upper and lower beam members erected between the column members constitute a column beam frame, and each of the joint portions where the column members and the beam members intersect each other. In the vibration damping device in which the brace is constructed by connecting the rod and the damper in series between the two joints on the diagonal line, the damper is slidably inserted into the cylinder via the piston. Piston rod, rod-side oil chamber and anti-rod-side oil chamber separated by a piston in the cylinder, and oil provided from the anti-rod-side oil chamber to the rod-side oil chamber at the time of compression provided in the piston or piston rod A check valve that allows the flow of air, a passage that is provided in the piston or piston rod and communicates with the rod-side oil chamber and the anti-rod-side oil chamber, and is provided in the middle of this passage to generate a damping force when extended valve Relief valve, or is composed of a damping force generating mechanism comprising an orifice, further, the vibration damping device, characterized in that a spring for biasing the piston rod constantly compressing direction to the rod side oil chamber.   The vibration damping device according to claim 1, wherein an initial tension for bracing is set by interposing a turnbuckle between the rod and the damper. At least two column members standing in the vertical direction and at least two upper and lower beam members erected between the column members constitute a column beam frame, and each of the joint portions where the column members and the beam members intersect each other. In the vibration damping device in which a brace is constructed by connecting a wire and a damper in series between two joints on a diagonal line, the damper is slidably inserted into the cylinder via a piston. Piston rod, rod-side oil chamber and anti-rod-side oil chamber separated by a piston in the cylinder, and oil provided from the anti-rod-side oil chamber to the rod-side oil chamber at the time of compression provided in the piston or piston rod A check valve that allows the flow of air, a passage that is provided in the piston or piston rod and communicates with the rod-side oil chamber and the anti-rod-side oil chamber, and is provided in the middle of this passage to generate a damping force when extended valve Relief valve, or is composed of a damping force generating mechanism comprising an orifice, further, the vibration damping device, characterized in that a spring for biasing the piston rod always compression direction in the rod side oil chamber.   4. The vibration damping device according to claim 3, wherein an initial tension for bracing is set by interposing a turnbuckle between the wire and the damper.

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