JP2014105428A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structurally-simple vibration control device capable of making a quick response.SOLUTION: A vibration control device 10 includes: expansion means 14 which is fixed to a longitudinal end of a lower flange 12F1 of a beam 12 of a column-beam frame 20 in the state of making an expansion surface overlap it and which expands/contracts the lower flange 12F1 in a lengthwise direction; detection means 22 which is fixed to a beam 12 or columns 16A and 16B joined to the beam 12, in the state of making an expansion surface overlap them, and which detects the amount of expansion/contraction of the beam 12 or the columns 16A and 16B; and control means 24 for expanding/contracting the expansion means 14 on the basis of an expansion amount or a contraction amount, which is detected by the detection means 22.

Description

  The present invention relates to a vibration damping device.

  Conventionally, a vibration damping device having a large mass (movable mass) has been used for damping a structure. The vibration of the structure is suppressed by using a reaction force generated by synchronizing the movable mass with the vibration characteristics of the structure itself or forcibly vibrating the movable mass.

Although these methods can obtain a large control force, they have a disadvantage that a large and heavy movable mass is required. That is, since the movable mass is large and heavy, there are restrictions on securing the installation space, the loading method at the time of installation, and the like.
Therefore, a compact and economical vibration control device using a damper has been proposed (Patent Document 1).

As shown in FIG. 13, the vibration damping device of Patent Document 1 is provided at a column beam joint that joins a steel beam 80 and a steel column 82.
That is, the upper flange 84 of the steel beam 80 and the flange 86 of the steel column 82 are fastened with the high-strength bolts 90 using the joint hardware 88, respectively.
Further, the web of the steel beam 80 is joined to the flange 86 of the steel column 82 by a joint hardware 89. At this time, the joint hardware 89 is provided with a loose hole that does not restrict the behavior of the web in the direction away from the flange 86 of the steel column 82, and the web of the steel beam 80 extends in the material axis direction of the steel beam 80. It is fastened with a high-strength bolt 90 so that it can slide. Joining of the joining hardware 89 and the flange 86 of the steel column 82 is fastened by a high strength bolt 90.
Further, the lower flange 85 of the steel beam 80 and the flange 86 of the steel column 82 are connected via a damper 92 that absorbs seismic energy.

  However, in the vibration damping device of Patent Document 1, the damper 92 must be connected across the joint between the steel beam 80 and the steel column 82, and the mounting structure is complicated. Further, the vibration control by the damper 92 has a slow response.

JP 2002-173977 A

  In view of the above facts, an object of the present invention is to provide a vibration damping device that has a simple structure and quick response.

  The vibration damping device according to the first aspect of the present invention includes an expansion / contraction means that is fixed by overlapping an expansion / contraction surface on an end portion in the longitudinal direction of the lower flange of the beam of the column beam frame and expands / contracts the lower flange in the length direction. The beam or a column joined to the beam is fixed by overlapping an expansion / contraction surface, based on a detection unit that detects an expansion / contraction amount of the beam or the column, and an extension amount or a contraction amount detected by the detection unit, And a control means for expanding and contracting the expansion / contraction means.

  According to the first aspect of the invention, the expansion / contraction amount of the beam or the column is detected by the detection means, and the expansion / contraction means is expanded / contracted based on the detection result by the control means. The expansion / contraction means is fixed by overlapping an expansion / contraction surface on the end of the lower flange of the beam of the column beam frame. By extending / contracting the expansion / contraction means, the lower flange of the beam is expanded / contracted in the length direction.

Thereby, at the time of vibration of the beam, it is possible to apply a force that generates a force that causes a deformation in the opposite phase to the deformation accompanying the vibration of the beam, thereby suppressing the vibration of the beam. Furthermore, since the expansion / contraction means is fixed to the end portion in the length direction of the lower flange, a large force can be exerted with a small amount of contraction and expansion.
As a result, it is possible to provide a vibration damping device that has a simple structure and quick response.

  According to a second aspect of the present invention, in the vibration damping device according to the first aspect, the beam is a steel large beam or a steel small beam, and the detection means is located above the expansion / contraction means and the steel large beam or the steel small beam. The upper flange is fixed by overlapping an expansion / contraction surface, and the expansion / contraction amount of the upper flange is detected.

  According to the second aspect of the present invention, the detection means fixed to the upper flange above the expansion / contraction means detects the expansion / contraction amount of the upper flange of the steel large beam or the steel small beam, and the control means is the expansion / contraction means. To control the length of the lower flange of the end of the steel beam or beam.

Specifically, when the detecting means detects the contraction of the upper flange, the control means determines that the end of the lower flange to which the expansion / contraction means is fixed is extended, and contracts the expansion / contraction means to reduce the lower flange. Let On the other hand, when the detection means detects the extension of the upper flange, the control means determines that the end of the lower flange is contracted, and extends the expansion / contraction means to extend the lower flange.
As a result, it is possible to apply a force that causes deformation in the opposite phase to the vibration to the steel large beam or the steel small beam, and to suppress the vibration of the steel large beam or the steel small beam. That is, one control system is formed at one end portion of the steel large beam or the steel small beam, and a vibration damping device with a simple structure and quick response can be provided.

  According to a third aspect of the present invention, in the vibration damping device according to the first aspect, the beam is a steel large beam or a steel small beam, and the expansion / contraction means is provided at one end of the steel large beam or the steel small beam. A first expansion / contraction means fixed by overlapping an expansion / contraction surface; and a second expansion / contraction means fixed by overlapping an expansion / contraction surface on the other end of the steel large beam or the steel beam. A first detection means for detecting an amount of expansion / contraction of the upper flange, fixed on an upper flange of the steel beam or the steel beam over the first expansion / contraction means, and above the second expansion / contraction means. And a second detection means for detecting an amount of expansion and contraction of the upper flange, fixed on the upper flange of the steel large beam or the steel small beam by overlapping the expansion / contraction surface, and the control means includes the first detection means and the first detection means. 2 Based on the amount of expansion or contraction detected by the detecting means, the first telescopic hand And it is characterized by expanding and contracting the second stretching means.

  According to the third aspect of the present invention, the first detecting means and the second detecting means simultaneously detect the expansion / contraction amounts of both ends of the steel large beam or the steel small beam, and the control means includes the first expansion means and the first expansion means. (2) The expansion / contraction means is controlled so that both ends of the lower flange of the end of the steel large beam or the steel small beam are simultaneously expanded and contracted in the length direction.

Specifically, when both the first detection means and the second detection means detect deformation (elongation or contraction) in the same direction, the control means causes both ends of the steel large beam or the steel small beam to vibrate vertically. For example, when the elongation is detected, the first flange and the second expansion / contraction means are controlled to cause the expansion and the lower flange is expanded. On the other hand, when the contraction is detected, the lower flange is contracted by controlling both the first expansion / contraction means and the second expansion / contraction means to contract.
Thereby, the vertical vibration of the steel large beam or the steel small beam can be suppressed.

On the other hand, when the first detection means and the second detection means detect deformation (extension or shrinkage) in different directions, the control means receives horizontal vibrations at both ends of the steel large beam or the steel small beam. For example, the lower flange is extended by controlling the first expansion / contraction means or the second expansion / contraction means at the end where the expansion is detected to cause expansion. On the other hand, the lower flange is contracted by controlling the first expanding / contracting means or the second expanding / contracting means at the end where the contraction is detected to cause the contraction.
Thereby, the horizontal vibration of the steel large beam or the steel small beam can be suppressed.

  As a result, the vertical vibration and horizontal vibration of the steel large beam or the steel small beam can be suppressed. That is, one control system is completed at both ends of the steel large beam or the steel small beam, and the vertical vibration and the horizontal vibration can be discriminated. Based on the discrimination result, the first expansion means and the second expansion means are controlled. The vertical vibration and the horizontal vibration can be effectively suppressed.

  According to a fourth aspect of the present invention, in the vibration damping device according to the first aspect, the beam is a steel large beam or a steel small beam, and the expansion / contraction means is provided at one end of the steel large beam or the steel small beam. A first expansion / contraction means fixed by overlapping an expansion / contraction surface; and a second expansion / contraction means fixed by overlapping an expansion / contraction surface on the other end of the steel large beam or the steel beam. An extension surface is fixed to the center of the upper flange of the steel large beam or the steel small beam, and the expansion amount of the upper flange of the steel large beam or the steel small beam is detected, and the control means detects the extension detected by the detection means. The first expansion / contraction means and the second expansion / contraction means are expanded / contracted based on the amount or the contraction amount.

  According to the fourth aspect of the present invention, the amount of expansion / contraction of the center portion of the upper flange of the steel large beam or the small steel beam is detected by the detection means, and the first expansion / contraction means and the second expansion / contraction means are detected by the control means. It is controlled to cancel the vertical vibration of the big beam or steel beam.

Specifically, for example, when the upper flange of the central portion of the steel beam or the steel beam is extended by vertical vibration, the control means determines that the lower flange is contracted, The first extension means and the second extension means are controlled to extend the lower flange. On the other hand, when the upper flange is contracted by vibration in the vertical direction, the control means determines that the lower flange is extended, and controls the first and second extendable means to control the lower flange. Reduce.
Thereby, the vertical vibration of the steel large beam or the steel small beam can be suppressed. Note that the detecting means cannot detect horizontal vibration and cannot suppress horizontal vibration.

  According to a fifth aspect of the present invention, in the vibration damping device according to the first aspect, the beam is a steel large beam or a steel small beam, and the expansion / contraction means is provided at one end of the steel large beam or the steel small beam. The first expansion / contraction means fixed by overlapping an expansion / contraction surface on the lower surface of the lower flange, and the second expansion / contraction fixed by overlapping the expansion / contraction surface on the upper surface of the lower flange at the other end of the steel beam or steel beam. A first detecting means fixed on the upper surface of the lower flange at one end provided with the first extending / contracting means, and the second extending / contracting means. And a second detection means fixed by overlapping an expansion / contraction surface on the lower surface of the lower flange at the other end provided with the control means, wherein the control means detects the amount of expansion or contraction detected by the first detection means. Based on the amount, the second expansion / contraction means is expanded / contracted, and the expansion detected by the second detection means is detected. It is characterized by expanding and contracting the first elastic means based on the amount or shrinkage amount.

  According to the fifth aspect of the present invention, the first detection means fixed to the upper surface of the lower flange of one end of the steel beam or the steel beam is fixed to the upper surface of the lower flange of the other end. The second expansion / contraction means is expanded and contracted, and the first expansion / contraction means fixed to the lower surface of the one lower flange is expanded / contracted by the second detection means fixed to the lower surface of the lower flange of the other end.

Specifically, the control means expands / contracts the second expansion / contraction means fixed to the end different from the first detection means, and expands / contracts the first expansion / contraction means fixed to the end different from the second detection means.
As a result, when both the first detection means and the second detection means detect deformation (elongation or contraction) in the same direction, both ends of the steel large beam or the steel small beam are subjected to vertical vibration. For example, when elongation is detected, the first and second expansion / contraction means are controlled to cause expansion, and the lower flange is expanded. On the other hand, when the contraction is detected, the lower flange is contracted by controlling both the first expansion / contraction means and the second expansion / contraction means to generate the contraction.
Thereby, the vertical vibration of the steel large beam or the steel small beam can be suppressed.

On the other hand, when the first expansion / contraction means and the second expansion / contraction means detect deformation (elongation or contraction) in different directions, the control means receives horizontal vibration at both ends of the steel large beam or the steel small beam. For example, the first extension means or the second extension means at the end opposite to the side where the extension is detected is controlled to cause the lower flange to be reduced. On the other hand, the lower flange is extended by controlling the first extension / contraction means or the second extension / contraction means at the end on which the shrinkage is detected to cause extension.
Thereby, the horizontal vibration of the steel large beam or the steel small beam can be suppressed.

  As a result, the vertical vibration and horizontal vibration of the steel large beam or the steel small beam can be suppressed. That is, one control system is completed at both ends of the steel large beam or the steel small beam, and the vertical vibration and the horizontal vibration can be discriminated. Based on the discrimination result, the first expansion means and the second expansion means are controlled. The vertical vibration and the horizontal vibration can be effectively suppressed. Further, since both the detection means and the expansion / contraction means may be fixed to the lower flange, the construction becomes easy.

  The invention according to claim 6 is the vibration damping device according to claim 1, wherein the beam is a steel large beam, the expansion / contraction means expands / contracts the lower flange of the steel frame large beam, and the detection means includes the steel frame It is a joint portion with a large beam, and is fixed by overlapping an expansion / contraction surface on the surface of the column, and detects the expansion / contraction amount of the column.

  According to the sixth aspect of the present invention, the amount of expansion / contraction of the surface of the column joined to the steel beam is detected by the detection means fixed to the surface of the column, and is fixed to the end of the steel beam by the control unit. The expansion / contraction means is controlled, and the lower flange of the end portion of the steel beam is expanded and contracted in the length direction.

Specifically, when the detection means detects the shrinkage of the surface of the column, the control means determines that the lower flange is contracted and controls the extension means to extend to extend the lower flange. On the other hand, the control means determines that the lower flange is extended when the detection means detects the extension of the surface of the column, and controls the expansion / contraction means to contract to reduce the lower flange.
As a result, vibration of the steel beam can be suppressed. That is, one control system can be arranged at one joint, and a vibration damping device with a simple structure and quick response can be provided.

  A seventh aspect of the present invention is the vibration damping device according to the first aspect, wherein the beam is a steel large beam, and the expansion / contraction means overlaps one end portion of the lower flange of the steel large beam. A first expansion / contraction means fixed to the other end of the lower flange and a second expansion / contraction means fixed by overlapping an expansion / contraction surface, and the detection means includes one end of the steel beam. First detection means fixed by overlapping an expansion / contraction surface on the joined column, and second detection means fixed by overlapping an expansion / contraction surface on the column joined to the other end of the steel beam. The control means is characterized in that the first expansion / contraction means and the second expansion / contraction means are expanded and contracted based on the amount of expansion or contraction detected by the first detection means and the second detection means.

  According to the seventh aspect of the present invention, the first detection means and the second detection means detect the amount of expansion / contraction of the surfaces of the two columns joined to both ends of the steel beam, and the control means detects the first expansion / contraction amount. The means and the second expansion / contraction means are controlled, and the lower flange of the end portion of the steel beam is expanded and contracted in the length direction.

  Specifically, when the first detection unit and the second detection unit detect deformation (elongation or contraction) in the same direction, the control unit detects that both ends of the steel large beam or the steel small beam receive vertical vibration. If both the first detection means and the second detection means detect deformation (extension or shrinkage) in different directions, it is determined that both ends of the steel large beam or the steel small beam are subjected to horizontal vibration. To do.

That is, when it is determined that the vertical vibration is received, for example, when an extension is detected in the column, the first flange and the second extender are controlled so as to cause the lower flange to contract. Reduce. On the other hand, when shrinkage is detected in the column, the lower flange is extended by controlling the first expansion means and the second expansion means to be extended.
Thereby, the vertical vibration of the steel beam can be suppressed.

On the other hand, if it is determined that the horizontal vibration is received, the expansion / contraction of the first expansion / contraction means or the second expansion / contraction means at the end where the expansion is detected is controlled so as to generate the expansion. Stretch. On the other hand, the lower flange is contracted by controlling the expansion / contraction of the first expansion / contraction means or the second expansion / contraction means at the end on the side where the contraction is detected to cause the contraction.
Thereby, the horizontal vibration of a steel-frame large beam can be suppressed.

  As a result, the vertical vibration and horizontal vibration of the steel large beam or the steel small beam can be suppressed. That is, one control system is completed at both ends of the steel large beam or the steel small beam, and the vertical vibration and the horizontal vibration can be discriminated. Based on the discrimination result, the first expansion means and the second expansion means are controlled. The vertical vibration and the horizontal vibration can be effectively suppressed.

  According to an eighth aspect of the present invention, in the vibration damping device according to any one of the first to seventh aspects, the expansion / contraction means is fixed to a flat substrate and both side surfaces of the substrate in accordance with an applied voltage. A film type piezoelectric element that expands and contracts the substrate, and the detection means is a film type piezoelectric element that is fixed to both side surfaces of the substrate and outputs a voltage corresponding to the amount of expansion and contraction of the substrate. And an element.

According to the eighth aspect of the present invention, the detecting means for detecting the amount of expansion and contraction and the expansion and contraction means for functioning as an actuator are formed by the film type piezoelectric element having the same configuration.
Thereby, even without providing a dedicated detection means for detecting the amount of expansion / contraction, only the expansion / contraction means having the same configuration can detect the deformation of the steel beam due to an external force and simultaneously suppress the vibration of the steel beam.

  Since the present invention has the above configuration, it is possible to provide a vibration damping device that has a simple structure and quick response.

It is a column beam frame side view showing the basic composition of the vibration damping device concerning a 1st embodiment of the present invention. (A) is a side view showing a basic configuration of an actuator used in a vibration damping device according to an embodiment of the present invention, (B) is a plan view thereof, and (C) is an exploded perspective view of a film-type piezoelectric element. FIG. (A) and (B) are both figures which show the electrical property of the actuator used with the damping device concerning the embodiment of the present invention. It is a column beam frame side view showing the basic composition of the vibration damping device concerning a 2nd embodiment of the present invention. It is a column beam frame side view showing the basic composition of the vibration damping device concerning a 3rd embodiment of the present invention. It is a column beam frame side view showing the basic composition of the vibration damping device concerning a 4th embodiment of the present invention. It is a column beam frame side view showing the basic composition of the vibration damping device concerning a 5th embodiment of the present invention. It is a column beam frame side view showing the basic composition of the vibration damping device concerning a 6th embodiment of the present invention. It is a column beam frame side view showing the basic composition of the vibration damping device concerning a 7th embodiment of the present invention. (A) is a system configuration | structure figure which shows the demonstration experiment apparatus of the damping device which concerns on 7th Embodiment of this invention, (B) is the table | surface which compared the beam span of the experiment building. (A) (B) is an acceleration characteristic figure which shows the verification experiment result of the damping device which concerns on 7th Embodiment of this invention, respectively. It is a column beam frame side view showing the basic composition of the vibration damping device concerning an 8th embodiment of the present invention. It is a side view which shows the basic composition of the damping device of a prior art example.

(First embodiment)
As shown in the side view of the column beam frame in FIG. 1, the vibration damping device 10 according to the first embodiment is provided with an actuator 14 that is an expansion / contraction means at the longitudinal end of the lower flange 12F1 of the beam 12 of the column beam frame 20. It is the structure which attached. As will be described later, the actuator 14 is formed to be extendable and contractable in a flat plate shape, and is fixed by overlapping an expandable surface on the surface of the lower flange 12F1.

The mounting position of the actuator 14 is the end of the beam 12 on the column 16A side, and is preferably an end near the column 16A that is separated from the joint with the column 16A by a dimension L that secures a working space. In addition, as a method for fixing the expansion / contraction surface of the actuator 14 and the surface of the lower flange 12F1, an external force is applied even if it expands and contracts itself, such as a method of directly joining with an adhesive or a method of screwing both ends. What is necessary is just a method which does not produce a shift | offset | difference in a junction part even if it expands and contracts.
Thereby, an expansion / contraction force can be applied to the lower flange 12F1 by extending / contracting the actuator 14.

  The sensor 22 which is a detection means is the lower surface of the upper flange 12F2 of the beam 12, and is fixed by overlapping an expansion / contraction surface above the actuator 14 at the end portion to which the actuator 14 is fixed. As will be described later, the sensor 22 has basically the same configuration as the actuator 14, and the method for fixing the sensor 22 and the upper flange 12 </ b> F <b> 2 may be the same as the method for fixing the actuator 14.

  Thereby, when the beam 12 is expanded and contracted by receiving an external force, the sensor 22 is also expanded and contracted, and an electromotive force associated with the expansion and contraction amount of the upper flange 12F2 is output from the sensor 22. That is, the amount of expansion / contraction of the upper flange 12F2 can be detected by measuring the output of the sensor 22 that is expanded / contracted with the expansion / contraction of the upper flange 12F2.

The output of the sensor 22 is output to the controller 24 which is a control means through the lead wire 58, and the controller 24 outputs a control signal through the lead wire 59 based on the output from the sensor 22 to expand and contract the actuator 14.
Here, the beam 12 is a steel large beam or a steel small beam made of H-shaped steel, and the columns 16A and 16B are also made of H-shaped steel. A concrete floor slab 18 is formed on the beam 12. In addition, although the case where the damping device 10 was provided in the column beam frame 20 on the column 16A side was described, the damping device 10 may be provided on the column beam frame 21 on the column 16B side.

  According to this configuration, the sensor 22 is fixed to the lower surface of the upper flange 12F2 and above the actuator 14, and the sensor 22 detects the amount of expansion and contraction of the beam 12. The controller 24 expands and contracts the actuator 14 based on the detection result of the sensor 22. The actuator 14 is fixed to the end of the lower flange 12F1 of the beam 12 of the column beam frame 20 by overlapping the surface of the lower flange 12F1 and the expansion / contraction surface. By extending the actuator 14, the lower flange of the beam 12 is fixed. 12F1 is expanded and contracted in the length direction.

Specifically, when the sensor 22 detects the contraction of the upper flange 12F2, the controller 24 applies, for example, an external force in the direction indicated by the arrow R1 to the column beam frame 20 so that the actuator 14 is fixed. It is determined that the end of the flange 12F1 is extended. As a result, the actuator 14 is controlled to contract in the direction indicated by the arrow S1 so that the end of the lower flange 12F1 is contracted.
On the other hand, when the sensor 22 detects the extension of the upper flange 12F2, the controller 24 determines that the external force in the direction indicated by the arrow R2 is applied and the end of the lower flange 12F1 is contracted. As a result, the actuator 14 is controlled to extend in the direction indicated by the arrow S2 to extend the end of the lower flange 12F1.

As a result, when the beam 12 vibrates, a force that causes deformation in the opposite phase to the deformation accompanying the vibration of the beam 12 can be applied to the lower flange 12F1 of the beam 12, and the vibration of the beam 12 can be suppressed. Furthermore, since the actuator 14 is fixed to the end portion of the lower flange 12F1 in the length direction, a large force can be exerted with a small amount of contraction and expansion.
That is, one control system is formed at one end of the beam 12 to be controlled, and the vibration damping device 10 with a simple structure and quick response can be provided at low cost.

Next, the actuator 14 will be described.
As shown in the side view of FIG. 2A and the plan view of FIG. 2B, the reactuator 14 has a structure in which film-type piezoelectric elements 26 are fixed to both side surfaces of a substrate 28 formed of a steel plate. Electric power is supplied to the film-type piezoelectric element 26 via the lead wire 122.

  As shown in the perspective view of FIG. 2C, the membrane-type piezoelectric element 26 is a polyimide film in which piezoelectric ceramics 128 formed in a fiber shape are arranged in a plane and electrodes are printed on both sides of the piezoelectric ceramic 128. 124 is arranged, and they are joined by an epoxy resin 126.

  In the film type piezoelectric element 26, when a voltage is applied from both sides of the piezoelectric ceramic 128 from the controller 24 via the lead wire 122, a distortion according to the applied voltage value is generated in the piezoelectric ceramic 128. The element 26 is deformed in the direction of the arrow P.

  As a result, by simultaneously applying the same applied voltage to the film-type piezoelectric elements 26 on both side surfaces of the substrate 28, the substrate 28 can be expanded and contracted in the direction of the arrow P from both side surfaces. That is, by fixing the substrate 28 to the lower flange 12F1 of the beam 12, it is possible to function as the actuator 14 that expands and contracts the lower flange 12F1 of the beam 12 according to the applied voltage. Moreover, the film-type piezoelectric element 26 has a thin film shape and can provide a compact reactuator 14.

  Further, the film-type piezoelectric element 26 has a characteristic of generating a voltage proportional to the amount of strain when the piezoelectric ceramic 128 is expanded and contracted to generate strain. That is, the film-type piezoelectric element 26 is deformed by an external force and outputs a voltage corresponding to the amount of expansion / contraction of the substrate 28. For example, by fixing the substrate 28 to the upper flange 12F2 of the beam 12, It can function as a strain sensor that detects the amount of strain due to deformation.

Next, the electrical characteristics of the actuator 14 will be described.
FIG. 3A is a characteristic diagram showing the relationship between the applied voltage and the generated output. The horizontal axis is the applied voltage (V), and the vertical axis is the generated output (N).
The reactuator 14 used in the experiment has a configuration in which film-type piezoelectric elements 26 are fixed to both side surfaces of a steel plate (substrate) having a thickness of 0.4 mm.
As shown by the characteristic PV, the experimental result shows that the characteristic PV is almost linear in the range where the applied voltage (V) is positive (particularly the tensile side of the steel plate), and the generated output proportional to the applied voltage (V) ( It can be seen that N) is obtained.

FIG. 3B shows the relationship between the acceleration signal of the actuator 14 and the phase difference between the applied voltages. The horizontal axis represents frequency (Hz), and the vertical axis represents phase difference (degrees).
In the experiment, an AC voltage was applied to the film-type piezoelectric element 26 shown in FIG. 2, and the relationship between the acceleration signal detected from the acceleration pickup 130 attached to the tip of the substrate 28 and the phase difference between the applied voltages was measured.

As shown in the characteristic Q, the experimental result shows that the phase difference increases substantially linearly as the frequency (Hz) increases, and a delayed phase of about 30 degrees at 100 Hz. It has been already known that the vibration of the beam actually generated is about 10 to 20 Hz, and the phase delay is about 5 to 15 degrees, and it has been confirmed that there is no practical problem.
In addition, the verification experiment mentioned later was conducted and it verified that the actuator 14 had no problem in practical use.

  That is, compared with the conventional AMD (Active Mass Damper) or TMD (Tuned Mass Damper) method, it is not necessary to use a large mass, a spring or the like, and the cost for carrying in and installing them can be reduced. In contrast to the conventional AMD and TMD installed at the center of the upper part of the beam, this embodiment is configured to be installed at the lower flange part of the beam end. For this reason, it also has an advantage that an installation space is not required above the beam.

Next, a vibration suppression method will be described with reference to FIG. The contents of each step have already been explained and will be omitted.
First, the step of detecting the amount of expansion / contraction of the beam 12 is executed. That is, the vibration (distortion amount) of the beam 12 is detected by the sensor 22 attached to the upper flange 12F2 of the beam 12. Here, the sensor 22 is deformed by receiving an external force, and outputs a voltage corresponding to the amount of expansion / contraction to the controller 24 via the lead wire 58.

  Next, a step of outputting a control signal is executed. That is, the controller 24 outputs a control signal to the actuator 14 based on the detection result input from the sensor 22. At this time, the actuator 14 is joined to the corner portion (column beam frame 20) of the beam 12, and a control signal is output from the controller 24 to the actuator 14 so as to extend and contract in the opposite phase to the detected expansion and contraction of the beam 12. Is done.

Finally, a step of applying a stretching force to the beam 12 is executed. That is, the actuator 14 is fixed by superimposing the base (stretchable portion) 28 on the surface of the lower flange 12F1 of the beam 12, and the substrate 28 is expanded and contracted by the film-type piezoelectric element 26 that expands and contracts according to the applied voltage. By extending and contracting the substrate 28, the lower flange 12F1 of the beam 12 is expanded and contracted, and vibration having a phase opposite to that of the vibration input to the beam 12 is given.
By executing the above steps, active vibration suppression of the beam 12 can be performed using the compact actuator 14.

(Second Embodiment)
As shown in the side view of the column beam frame in FIG. 4, the vibration damping device 30 according to the second embodiment is configured such that the vibration damping device 10 described in the first embodiment is attached to both ends of the beam 12. It is. The difference from the first embodiment will be mainly described.
As shown in FIG. 4, a vibration damping device 10 </ b> A having the same configuration as that of the vibration damping device 10 described in the first embodiment is attached to a column beam frame 20 of columns 16 </ b> A and beams 12. Also, a vibration damping device 10B having the same configuration as that of the vibration damping device 10 described in the first embodiment is attached to the column beam frame 21 of the columns 16B and the beams 12. The vibration damping device 10A and the vibration damping device 10B are configured to be controlled independently, and the constituent devices are distinguished by the suffixes A and B, but the same devices are used for both.

  With this configuration, as described in the first embodiment, the vibration damping device 10A detects vibration of the beam 12 in the column beam frame 20 with the sensor 22A and outputs the vibration to the controller 24A with the lead wire 58A. The controller 24A controls the actuator 14A to output to the actuator 14A a force that causes a deformation in phase opposite to the deformation caused by the vibration of the beam 12, and applies a force to the lower flange 12F1 of the beam 12 with the actuator 14A. The vibration of the beam 12 is suppressed.

  Further, the vibration damping device 10B detects the vibration of the beam 12 by the sensor 22B in the column beam frame 21, and outputs it to the controller 24A through the lead wire 59A. The controller 24B controls the actuator 14B to output to the actuator 14B a force that causes a deformation in phase opposite to the deformation caused by the vibration of the beam 12, and applies a force to the lower flange 12F1 of the beam 12 by the actuator 14B. 12 vibrations are suppressed.

  According to the present embodiment, the column beam frames 20 and 21 at both ends of the beam 12 can be independently controlled by the method described in the first embodiment. As a result, the entire slab 18 can be controlled more effectively. Other configurations are the same as those of the vibration damping device 10 according to the first embodiment, and a description thereof will be omitted.

(Third embodiment)
As shown in the side view of the column beam frame in FIG. 5, the vibration damping device 34 according to the third embodiment replaces the two controllers 24 </ b> A and 24 </ b> B in the vibration damping device 30 described in the second embodiment with one controller 36. In summary, the configuration is different from that of the second embodiment. The difference will be mainly described.

  In the vibration damping device 34, the beam 12 is a large steel beam or a small steel beam, and the actuator 14 includes a first actuator 14A fixed on one end portion (column beam frame 20 side) of the beam 12 with a stretchable surface overlapped. The second actuator 14B is fixed to the other end of the beam 12 (on the column beam frame 21 side) with an extensible surface fixed thereon. The first actuator 14A and the second actuator 14B have the same configuration.

  The sensor 22 is fixed to the upper flange 12F2 of the beam 12 over the first actuator 14A with an expansion / contraction surface overlapped, and detects the amount of expansion / contraction of the upper flange 12F2 and the second actuator 14B. The beam 12 includes a second sensor 22B which is fixed to the upper flange 12F2 of the beam 12 by overlapping an expansion / contraction surface and detects the expansion / contraction amount of the upper flange 12H2. The first sensor 22A and the second sensor 22B have the same configuration.

  The detection results of the first sensor 22A and the second sensor 22B are output to the controller 36 through lead wires 58A and 58B, and the controller 36 detects the amount of expansion or contraction detected by the first sensor 22A and the second sensor 22B. Based on the above, the control signals are output to the first actuator 14A and the second actuator 14B through the lead wires 58A and 58B, and the first actuator 14A and the second actuator 14B are expanded and contracted.

  That is, the first sensor 22A and the second sensor 22B simultaneously detect the expansion and contraction amounts of both ends of the beam 12, and the controller 36 controls the first actuator 14A and the second actuator 14B to control the end portions of the beam 12. Both end portions of the lower flange 12F1 are simultaneously expanded and contracted in the length direction.

Specifically, when both the first sensor 22A and the second sensor 22B detect deformation (elongation or contraction) in the same direction, the controller 36 receives vertical vibrations at both ends of the beam 12. Judge.
For example, when elongation is detected, the controller 36 determines that both ends of the beam 12 are deformed in the direction of the arrow R2, and both the first actuator 14A and the second actuator 14B are in the direction of the arrow S2. The lower flange 12F1 is extended by controlling so as to cause the elongation of.

  On the other hand, when the shrinkage is detected, the controller 36 determines that both ends of the beam 12 are deformed in the direction of the arrow R1, and both the first actuator 14A and the second actuator 14B are in the direction of the arrow S1. The lower flange 12 </ b> F <b> 1 is reduced by controlling so as to cause the above-described shrinkage. Thereby, the vertical vibration of the beam 12 can be suppressed.

On the other hand, when the first sensor 22A and the second sensor 22B detect deformation (extension or contraction) in different directions, the controller 36 determines that both ends of the beam 12 are subjected to horizontal vibration. To do.
For example, when extension is detected by the first sensor 22A of the column beam frame 20 and contraction is detected by the second sensor 22B of the column beam frame 21, the controller 36 in the column beam frame 20 moves in the direction of the arrow R2. Deformation has occurred, and it is determined that the column beam frame 21 has undergone deformation in the direction of arrow R1.

  Next, the controller 36 extends the lower flange 12F1 by controlling the first actuator 14A at the end on the column beam frame 20 side where the elongation is detected in the direction of the arrow S2 so as to cause the elongation. On the other hand, the second actuator 14B at the end on the column beam frame 21 side where the shrinkage is detected is controlled in the direction of the arrow S1 to cause the shrinkage to shrink the lower flange 12F1. Thereby, the horizontal vibration of the beam 12 can be suppressed.

  As a result, the vertical vibration of the beam 12 and the horizontal vibration of the beam 12 can be suppressed, respectively. That is, both end portions (column beam frames 20 and 21) of the beam 12 are controlled by one control system. That is, the vertical vibration and the horizontal vibration can be discriminated from the outputs of the first sensor 22A and the second sensor 22B. Based on the discrimination result, the controller 36 independently sets the first actuator 14A and the second actuator 14B. Control to effectively suppress vertical and horizontal vibrations. Other configurations are the same as those of the vibration damping device 30 according to the second embodiment, and a description thereof will be omitted.

(Fourth embodiment)
As shown in the side view of the column beam frame in FIG. 6, the vibration damping device 40 according to the fourth embodiment is different from the vibration damping device 10 according to the first embodiment in the installation location of the sensor 23. It differs in that it has been added. The difference will be mainly described.

The sensor 23 of the vibration damping device 40 is attached to the lower surface of the upper flange 12F2 at the center of the beam 12. The output of the sensor 23 is output to the controller 42 through a lead wire 58.
A first actuator 14A is fixed to the column beam frame 20, and a second actuator 14B is fixed to the column beam frame 21. The first actuator 14A and the second actuator 14B are connected to the controller 42 by lead wires 59A and 59B, respectively.
As a result, the sensor 23 detects the amount of expansion / contraction at the center of the upper flange of the beam 12, and the controller 42 controls the first actuator 14 </ b> A and the second actuator 14 </ b> B to cancel the vertical vibration of the beam 12.

  Specifically, for example, when it is determined from the output from the sensor 23 that the upper flange 12F2 at the center of the beam 12 is extended by vibration in the vertical direction, the controller 42 determines that the lower flange 12F1 is It is determined that the first actuator 14A is contracted, and the first actuator 14A and the second actuator 14B are both controlled in the direction of the arrow S2 to extend the lower flange 12F1.

  On the other hand, if it is determined from the output from the sensor 23 that the upper flange 12F2 is contracted by vibration in the vertical direction, the controller 42 determines that the lower flange 12F1 is extended, and the first actuator 14A and the second actuator 14B are both controlled in the direction of the arrow S1 to reduce the lower flange 12F1.

Thereby, the vertical vibration of the beam 12 can be suppressed. That is, in this embodiment, the displacement is in phase at the vibration detection position of the sensor 23 and the vibration control positions of the first actuator 14A and the second actuator 14B. For this reason, the controller 42 does not need to output an anti-phase signal for control. In addition, since the sensor 23 is attached to the center part of the beam 12, horizontal vibration cannot be detected and horizontal vibration cannot be suppressed.
Other configurations are the same as those of the vibration damping device 10 according to the first embodiment, and a description thereof will be omitted.

(Fifth embodiment)
As shown in the side view of the column beam frame in FIG. 7, the vibration damping device 46 according to the fifth embodiment is different from the vibration damping device 10 described in the first embodiment in the mounting position of the sensor 22. The difference will be mainly described.

  The vibration damping device 46 is provided in the column beam frame 20 and controls the column beam frame 20. The beam 12 is a steel large beam, the actuator 14 is fixed to the lower flange 12F1 of the beam 12, and the sensor 22 is a joint portion with the beam 12, and is fixed by overlapping an expansion / contraction surface on the surface 16F of the column 16A. The sensor 22 and the controller 48 are connected by a lead wire 58A, and the actuator 14 and the controller 48 are connected by a lead wire 58A.

  According to this configuration, the expansion / contraction amount of the surface 16F of the column 16A joined to the beam 12 is detected by the sensor 22 fixed to the surface of the column 16F, and the actuator fixed to the end of the beam 12 by the controller 48. 14 is controlled, and the lower flange 12F1 at the end of the beam 12 is expanded and contracted in the length direction.

  Specifically, when the sensor 22 detects the contraction of the surface 16F of the column 16, the controller 48 determines that the force in the direction of the arrow R1 acts on the beam 12 and the lower flange 12F1 is contracted, The lower flange 12F1 is extended by controlling the actuator 14 to extend in the direction of the arrow S2.

  On the other hand, when the sensor 22 detects the extension of the surface 16F of the column 16, the controller 48 determines that the force in the direction of the arrow R2 acts on the beam 12 and the lower flange 12F1 extends, and the direction of the arrow S1. The lower flange 12F1 is contracted by controlling the actuator 14 to contract.

As a result, vibration of the beam 12 can be suppressed. That is, by providing one control system (vibration control device 46) in one joint (column beam frame 20), vibration can be suppressed, and a vibration control device 46 having a simple structure and quick response can be provided. it can.
Other configurations are the same as those of the vibration damping device 10 according to the first embodiment, and a description thereof will be omitted.

(Sixth embodiment)
As shown in the side view of the column beam frame in FIG. 8, the vibration damping device 50 according to the sixth embodiment replaces the vibration damping device 46 according to the fifth embodiment with both ends of the beam 12 (the column beam frame 20 and the column). It is the structure attached to the beam frame 21). The difference will be mainly described.

  The vibration damping device 50 includes a vibration damping device 46A provided on the column beam frame 20 and a vibration damping device 46B provided on the column beam frame 21. Both the vibration damping device 46A and the vibration damping device 46B have the same configuration as the vibration damping device 46 according to the fifth embodiment, and a description thereof will be omitted.

Thereby, in the vibration damping device 46A, the controller 48A expands and contracts the first actuator 14A in the same manner as in the fifth embodiment based on the amount of expansion or contraction of the column 16A detected by the first sensor 22A. The lower flange 12F1 is expanded and contracted.
Further, in the vibration damping device 46B, the controller 48B expands and contracts the second actuator 14B in the same manner as in the fifth embodiment based on the amount of expansion or contraction of the column 16B detected by the second sensor 22B. The flange 12F1 is expanded and contracted.

  As a result, vibrations at both ends of the beam 12 can be independently suppressed, and vibration of the floor slab 18 can be suppressed in a wide range. Other configurations are the same as those of the vibration damping device 10 according to the fifth embodiment, and a description thereof will be omitted.

(Seventh embodiment)
As shown in the side view of the column beam frame in FIG. 9, the vibration damping device 54 according to the seventh embodiment is configured so that the sensors 22A and 22B in the vibration damping device 34 according to the third embodiment are respectively connected to the lower flange 12F1 of the beam 12. It is the structure moved to both ends. The difference will be mainly described.

  In the vibration damping device 54, the beam 12 is a large steel beam or a small steel beam, and the first actuator 14A has a telescopic surface superimposed on the lower surface of the lower flange 12F1 of one end of the beam 12 (column beam frame 20). The second actuator 14B is fixed to the lower surface of the lower flange 12F1 of the other end (column beam frame 21) of the beam 12 with an expansion / contraction surface overlapped.

In addition, the first sensor 22A is fixed to the upper surface of the lower flange of one end portion (column beam frame 20) where the first actuator 14A is provided, and the second sensor 22B is fixed to the second sensor 22B. The expansion / contraction surface is overlapped and fixed to the lower surface of the lower flange of the other end (column beam frame 21) provided with the actuator 14B. That is, the first sensor 22A and the first actuator 14A, and the second sensor 22B and the second actuator 14B are fixed to the upper surface and the lower surface, respectively, with the lower flange 12F1 interposed therebetween.
Further, the controller 36 expands and contracts the second actuator 14B based on the amount of extension or contraction detected by the first sensor 22A, and controls the first actuator 14A based on the amount of extension or contraction detected by the second sensor 22B. Extend and contract.

  That is, the first sensor 22A fixed to the upper surface of the lower flange 12F1 of one end (column beam frame 20) of the beam 12 is fixed to the lower surface of the lower flange 12F1 of the other end (column beam frame 21). In addition, the second actuator 14B is expanded and contracted. The second sensor 22B fixed to the lower surface of the lower flange 12F1 of the other end (column beam frame 21) is fixed to the lower surface of the lower flange 12F1 of one end (column beam frame 20). 1 Actuator 14A is expanded and contracted. Thereby, a vibration detection position and a vibration control position can be separated, and the accuracy of vibration detection of the beam 12 and vibration control of the beam 12 can be improved.

Specifically, the controller 56 expands and contracts the second actuator 14B fixed to the end (column beam frame 21) different from the first sensor 22A, and sets the end (column beam frame 20) different from the second sensor 22B. The fixed first actuator 14A is expanded and contracted.
Thus, the controller 36 determines that both ends of the beam 12 are subjected to vertical vibration when both the first sensor 22A and the second sensor 22B detect deformation (extension or contraction) in the same direction. .

For example, when the first sensor 22A and the second sensor 22B both detect extension, the first actuator 14A and the second actuator 14B both control to cause extension, and the lower flange 12F1 is extended.
On the other hand, when the first sensor 22A and the second sensor 22B both detect contraction, the first actuator 14A and the second actuator 14B both control the contraction to cause the lower flange 12F1 to contract.
Thereby, the vertical vibration of the beam 12 can be suppressed.

On the other hand, when the first sensor 22A and the second sensor 22B detect deformation (extension or contraction) in different directions, the controller 36 determines that both ends of the beam 12 are subjected to horizontal vibration. To do.
For example, from the outputs of the first sensor 22A and the second sensor 22B, the lower flange 12F1 is controlled by controlling the first actuator 14A or the second actuator 14B at the end opposite to the side where the extension is detected to cause contraction. Reduce.
On the other hand, from the output of the first sensor 22A and the second sensor 22B, the first actuator 14A or the second actuator 14B at the end where the contraction is detected is controlled to cause expansion, and the lower flange 12F1 is expanded. Let
Thereby, the horizontal vibration of the beam 12 can be suppressed.

  As a result, the vertical vibration and horizontal vibration of the beam 12 can be suppressed. That is, one control system is completed at both ends of the beam 12, and the vertical vibration and the horizontal vibration can be discriminated. Based on the discrimination result, the first actuator 14A and the second actuator 14B are controlled, and the vertical vibration and the horizontal vibration are controlled. Horizontal vibration can be effectively suppressed. Moreover, since all of the 1st sensor 22A and the 2nd sensor 22B, and the 1st actuator 14A and the 2nd actuator 14B should just be fixed to a lower flange, construction becomes easy.

Next, a verification experiment using this embodiment will be described.
FIG. 10 (A) shows a demonstration experiment apparatus for the actual vibration damping device 54. The demonstration experiment was conducted using a part of the building currently in use. The floor 152 is supported by a large beam 142 made of H-shaped steel spanned between columns 140 and a small beam 144 made of H-shaped steel spanned between the large beams 142. As shown in FIG. 10B, the demonstration experiment was performed using two experimental buildings H1 and H2 having different spans SP1 and SP2 of the large beam 142.

FIG. 10 (A) is a view of the second floor from the first floor. Sensors 146A, 146B and actuators 148A, 148B are fixed side by side on both ends of the small beam 144, respectively. The sensors 146C and 146C and the actuators 148C and 148D are fixed to the both ends of the small beam 145 side by side.
An acceleration sensor 154 that detects vibration of the floor 152 is attached to substantially the center of the four actuators 148A, 148B, 148C, and 148D. The acceleration sensor 154 is attached to the upper surface of the floor 152.

  In this configuration, the single beam 150 is independently controlled by one controller 150. That is, based on the amount of strain at the end of the small beam 144 detected by the sensor 146A, the controller 150 expands and contracts the actuator 148B at the opposite end. Further, based on the amount of strain at the end of the small beam 144 detected by the sensor 146B, the controller 150 extends and contracts the actuator 148A at the opposite end. As a result, the lower flange of the small beam 144 is expanded and contracted in a state where the actuators 148A and 148B are joined to the large beam 142, and the small beam 144 is subjected to a vibration having a phase opposite to that detected by the sensors 146A and 146B. be able to.

Similarly, based on the amount of strain at the end of the small beam 145 detected by the sensor 146C, the controller 150 expands and contracts the actuator 148D at the opposite end. Further, based on the amount of strain at the end of the small beam 145 detected by the sensor 146C, the controller 150 expands and contracts the actuator 148C at the opposite end. As a result, the lower flange of the small beam 145 is expanded and contracted with the expansion and contraction of the actuators 148C and 148D, and a vibration having a phase opposite to that detected by the sensors 146C and 146D is given to the small beam 145. be able to.

First, the results of a demonstration experiment of acceleration amplitude will be described.
In the verification experiment of the acceleration amplitude, the experimental building H1 was used, a vibration exciter 156 was installed near the acceleration sensor 154, and the floor 152 was vibrated with the vibration exciter 156. Excitation was a sine wave with a frequency of 8.5 Hz. In the demonstration experiment, the output of the acceleration sensor 154 was measured for each of the case where the vibration damping device 54 was not used and the case where the vibration damping device 54 was used.

The result of the demonstration experiment is shown in FIG. In FIG. 12A, the horizontal axis represents time (s), and the vertical axis represents acceleration amplitude (gal). The characteristic indicated by the thin solid line is the acceleration amplitude when the vibration damping device 54 is not used, and the characteristic indicated by the thick solid line is the acceleration amplitude when the vibration damping device 54 is used.
From the results of the demonstration experiment, when the vibration damping device 54 is not used, the maximum value of the acceleration amplitude is about ± 4.0 (gal). The maximum value is about ± 1.0 (gal). In other words, the maximum value of the acceleration amplitude was reduced to about a quarter, and a large acceleration amplitude suppressing effect was observed. It can be said that the vibration suppression effect in this embodiment was verified.

Next, a demonstration experiment of sensory correction acceleration will be described.
In the demonstration experiment of the sensory correction acceleration, the subject walked near the acceleration sensor 154 using the experimental building H2, and the vibration of the floor 152 due to walking was measured. Since many frequency components are included in walking vibration, a sensory correction filter is attached to the accelerometer, and a frequency component that easily reacts to human senses (for example, a frequency of 13.6 Hz) is extracted.
Similar to the above, the demonstration experiment was performed for each of the case where the vibration damping device 54 was not used and the case where the vibration damping device 54 was used.

The result of the demonstration experiment is shown in FIG. The horizontal axis in FIG. 12B is time (s), and the vertical axis is sensory correction acceleration (gal). The characteristic indicated by the thin solid line is the sensory correction acceleration when the vibration damping device 54 is not used, and the characteristic indicated by the thick solid line is the sensory correction acceleration when the vibration damping device 54 is used.
From the result of the demonstration experiment, when the vibration damping device 54 is not used, the maximum value of the sensory correction acceleration is about ± 4.0 (gal). The maximum value of acceleration is about ± 1.4 (gal). That is, the maximum value of the acceleration amplitude was reduced to about one third, and a large sensory correction acceleration suppression effect was observed. It can be said that the effect of suppressing the sensory correction acceleration in this embodiment has been verified.

(Eighth embodiment)
As shown in the side view of the column beam frame in FIG. 12, the vibration damping device 60 according to the eighth embodiment is different from the vibration damping device 50 described in the sixth embodiment in that one controller 62 is used. . The difference will be mainly described.

In the vibration damping device 60, the beam 12 is a large steel beam, and the first actuator 14A, which is fixed to the lower end of the lower flange 12F1 (column beam frame 20) of the beam 12 with an expansion / contraction surface, and the lower flange 12F1 It has the 2nd actuator 14B fixed on the other edge part (column beam frame 21) by overlapping an expansion-contraction surface.
In addition, the first sunsa 22A, which is fixed by overlapping the expansion / contraction surface on the column 16A joined to one end of the beam 12, and the column 16B, bonded to the other end of the beam 12, is fixed by overlapping the expansion / contraction surface. Second sensor 22B.
The controller 62 expands and contracts the first actuator 14A and the second actuator 14B based on the amount of expansion or contraction detected by the first sensor 22A and the second sensor 22B.

  Accordingly, the first sensor 22A and the second sensor 22B detect the amount of expansion and contraction of the surfaces of the two columns 16A and 16B joined to the both ends (column beam frame 20, 21) of the beam 12, and the controller 62 The first actuator 14A and the second actuator 14B are controlled, and the lower flanges 12F1 at both ends of the beam 12 are expanded and contracted in the length direction.

  Specifically, when the first sensor 22A and the second sensor 22B detect deformation (elongation or contraction) in the same direction, the controller 62 determines that both ends of the beam 12 are subjected to vertical vibration. . On the other hand, when the first sensor 22A and the second sensor 22B detect deformation (extension or contraction) in different directions, it is determined that both ends of the beam 12 are subjected to horizontal vibration.

In other words, if it is determined that vertical vibration has been received, for example, when extension is detected in the pillars 16A and 16B, the controller 62 causes both the first actuator 14A and the second actuator 14B to contract. And lower flange 12F1 is reduced.
On the other hand, when contraction is detected in the pillars 16A and 16B, the controller 62 controls the first actuator 14A and the second actuator 14B to be stretched to extend the lower flange 12F1.
Thereby, the vertical vibration of the beam 12 can be suppressed.

On the other hand, if it is determined that horizontal vibration is received, the controller 62 causes the first actuator 14A or the second actuator 14A at the end where the extension is detected to expand or contract. Control to extend the lower flange 12F1.
On the other hand, the controller 62 controls the expansion / contraction of the first actuator 14A or the second actuator 14A at the end on which the contraction is detected to cause the contraction, thereby contracting the lower flange 12F1.
Thereby, the horizontal vibration of the beam 12 can be suppressed.

As a result, the vertical vibration and horizontal vibration of the beam 12 can be suppressed. That is, one control system is completed at both ends of the beam 12, and the vertical vibration and the horizontal vibration can be discriminated. Based on the discrimination result, the first actuator 14A and the second actuator 14B are controlled, and the vertical vibration and the horizontal vibration are controlled. Horizontal vibration can be effectively suppressed.
Other configurations are the same as those of the vibration damping device 50 according to the sixth embodiment, and a description thereof will be omitted.

10 Damping device 12 Beam (large beam, small beam)
12F1 Lower flange 12F2 Upper flange 14 Actuator (expandable means)
16 pillar 20 pillar beam structure 22 sensor (detection means)
24 controller (control means)
26 Film-type piezoelectric element 27 Stretchable surface 28 Substrate

Claims (8)

Stretching means that stretches and stretches the lower flange in the longitudinal direction and is fixed to the end of the lower flange of the beam of the column beam frame, and stretches the lower flange in the length direction;
A detecting means for detecting an amount of expansion / contraction of the beam or the column, and is fixed by overlapping an expansion / contraction surface on the beam or the column joined to the beam,
Control means for expanding and contracting the expansion and contraction means based on the amount of expansion or contraction detected by the detection means;
A vibration damping device. The beam is a steel beam or a steel beam.
2. The vibration damping device according to claim 1, wherein the detecting unit is fixed by overlapping an expansion / contraction surface on an upper flange of the steel large beam or the steel small beam above the expansion / contraction unit, and detects an expansion / contraction amount of the upper flange. The beam is a steel beam or a steel beam.
The expansion / contraction means includes a first expansion / contraction means fixed by superimposing an expansion / contraction surface on one end of the steel large beam or steel beam, and an expansion / contraction surface overlapping the other end of the steel large beam or steel beam. A second expansion / contraction means fixed,
The detection means includes a first detection means for detecting an amount of expansion and contraction of the upper flange, and an upper and lower surface of the steel large beam or steel beam are overlapped and fixed on an upper flange of the steel large beam and the steel small beam. A second detecting means for detecting an amount of expansion / contraction of the upper flange, wherein an elastic surface is overlapped and fixed on the upper flange of the steel large beam or the steel small beam above the expansion / contraction means;
2. The vibration damping device according to claim 1, wherein the control unit expands and contracts the first expansion / contraction unit and the second expansion / contraction unit based on an extension amount or a contraction amount detected by the first detection unit and the second detection unit. . The beam is a steel beam or a steel beam.
The expansion / contraction means includes a first expansion / contraction means fixed by superimposing an expansion / contraction surface on one end of the steel large beam or steel beam, and an expansion / contraction surface overlapping the other end of the steel large beam or steel beam. A second expansion / contraction means fixed,
The detection means is fixed by overlapping an expansion / contraction surface on a center portion of the upper flange of the steel large beam or the steel small beam, and detects an expansion / contraction amount of the upper flange of the steel large beam or the steel small beam,
2. The vibration damping device according to claim 1, wherein the control unit expands and contracts the first expansion / contraction unit and the second expansion / contraction unit based on an extension amount or a contraction amount detected by the detection unit. The beam is a steel beam or a steel beam.
The expansion / contraction means includes a first expansion / contraction means fixed by overlapping an expansion / contraction surface on the lower surface of the lower flange at one end of the steel large beam or steel beam, and the other end of the steel large beam / steel beam. A second expansion / contraction means fixed by overlapping an expansion / contraction surface on the upper surface of the lower flange,
The detection means includes a first detection means fixed by overlapping an expansion / contraction surface on an upper surface of the lower flange at one end where the first expansion / contraction means is provided, and the other detection unit provided with the second expansion / contraction means. And a second detection means fixed by overlapping an expansion / contraction surface on the lower surface of the lower flange at the end,
The control means expands and contracts the second expansion / contraction means based on the amount of extension or contraction detected by the first detection means, and controls the first expansion / contraction means based on the amount of extension or contraction detected by the second detection means. The vibration damping device according to claim 1, wherein the vibration damping device is expanded and contracted. The beam is a steel beam.
The expansion and contraction means expands and contracts the lower flange of the steel beam.
2. The vibration damping device according to claim 1, wherein the detection unit is a joint portion with the steel beam and is fixed by overlapping an expansion / contraction surface on a surface of the column, and detects an expansion / contraction amount of the column. The beam is a steel beam.
The expansion / contraction means includes a first expansion / contraction means fixed by overlapping an expansion / contraction surface on one end of the lower flange of the steel beam, and a first expansion / contraction means fixed by overlapping an expansion / contraction surface on the other end of the lower flange. 2 expansion and contraction means,
The detection means includes first detection means fixed by overlapping an expansion / contraction surface on the column joined to one end of the steel beam, and expansion / contraction to the column joined to the other end of the steel beam. Second detection means fixed by overlapping the surfaces,
2. The vibration damping device according to claim 1, wherein the control unit expands and contracts the first expansion / contraction unit and the second expansion / contraction unit based on an extension amount or a contraction amount detected by the first detection unit and the second detection unit. .   The expansion / contraction means includes a flat substrate, and a film-type piezoelectric element that is fixed to both side surfaces of the substrate and expands / contracts the substrate according to an applied voltage, and the detection means includes a flat substrate, The vibration damping device according to claim 1, further comprising: a film-type piezoelectric element that is fixed to both side surfaces of the substrate and outputs a voltage corresponding to an expansion / contraction amount of the substrate.