JP6605924B2 - Vibration suppression device for structures - Google Patents

Description

  The present invention relates to a vibration suppressing device for a structure erected on a support.

  Conventionally, what was disclosed by patent document 1 as this kind of vibration suppression apparatus is known, for example. This vibration suppression device is applied to a high-rise building and includes a plurality of support members and a mass damper. Each support member is erected on the outer periphery of the building, and each mass damper has a rotating mass and a ball screw, and is connected to the upper end portion of the corresponding support member and the upper end portion of the building. In the vibration suppressing device, when the building vibrates due to an earthquake or the like, the displacement of the building due to the vibration is transmitted to the mass damper via the support member, and thereby the rotating mass rotates as the mass damper expands and contracts. Moreover, by absorbing the vibration energy of the building by the additional vibration system by tuning (resonating) the natural frequency of the plurality of additional vibration system composed of the plurality of support members and the mass damper to the natural frequency of the building, Vibration of the building is suppressed.

Patent No. 5190652

  As described above, in this conventional vibration suppression device, a structure such as a high-rise building where bending deformation is dominant is controlled, and a portion where shear deformation such as a low-rise portion of a high-rise building is dominant is controlled. It is not intended for control. As for the vibration of the first-order mode of structures such as high-rise buildings, the direction of displacement due to bending deformation and the direction of displacement due to shear deformation are the same as each other, and vibration is caused by the sum of bending deformation and shear deformation. When the shear deformation ratio is relatively large with respect to the bending deformation, the conventional vibration suppressing device may not be able to sufficiently suppress the vibration of the structure.

  The present invention has been made to solve the above-described problems, and can appropriately link two dampers when a structure vibrates, thereby sufficiently suppressing the vibration of the structure. An object of the present invention is to provide a vibration suppressing device that can perform the above-described operation.

In order to achieve the above object, the invention according to claim 1 is a vibration suppressing device for a structure that has a column extending in the vertical direction and is erected on a support, and has higher rigidity than the column. and, extending vertically, and a transmission member Rutotomoni which have a length in the horizontal direction, the overall vertical direction have you to one end of the horizontal integrally provided on at least the upper portion of the pillar, extending vertically The transmission member is connected to one of a predetermined portion on the other end side in the horizontal direction at the lower end portion of the transmission member and a predetermined first portion in the system composed of the support and the lower portion of the structure, and is filled with a working fluid. The first cylinder is slidably provided in the first cylinder, and the first cylinder is divided into a first fluid chamber and a second fluid chamber, and the other of the predetermined portion and the first portion of the transmission member is provided. First piston connected, and horizontally extending, support and structure It is connected to the second cylinder connection object which is one of the predetermined second part in the system composed of the lower part and the predetermined third part of the structure above the second part, and is filled with the working fluid The second cylinder is slidably provided in the second cylinder, divides the second cylinder into a third fluid chamber and a fourth fluid chamber, and is connected to the second piston which is the other of the second and third portions. A second piston connected to the object, and when the structure is displaced in one side in the horizontal direction with respect to the support by virtue of the structure vibrating in the primary mode vibration mode, A force in the direction of moving the first piston toward the first fluid chamber acts on the first cylinder and the first piston from the first part, and the second cylinder and the second piston from the second and third parts to the second cylinder and the second piston. 2 Piston moved to the 3rd fluid chamber A first communication passage that communicates the first and third fluid chambers with each other, and a second communication passage that communicates the second and fourth fluid chambers with each other. It is characterized by providing.

  When a structure having a relatively large aspect ratio vibrates in the first mode vibration mode, the direction of displacement due to bending deformation of the structure is the same as the direction of displacement due to shear deformation, and the displacement due to these bending deformations. And the displacement due to shear deformation tend to be relatively large. In addition, the degree of bending deformation due to the vibration of the structure increases as the upper part of the structure increases, and the degree of shear deformation due to the vibration of the structure increases as the lower part of the structure increases. growing. Focusing on the above points, the present invention adopts the above-described configuration.

That is, the transmission member having a rigidity higher than pillar extending vertically, having a length in the horizontal direction Rutotomoni the entire vertical direction have you to one end of the horizontal direction is provided integrally with the pillar Yes. Further, the first cylinder extending in the vertical direction is provided at one of a predetermined portion on the other end portion side in the horizontal direction at the lower end portion of the transmission member and a predetermined first portion in the system composed of the support and the lower portion of the structure. The first cylinder is filled with a working fluid and a first piston is slidably provided. The first piston partitions the inside of the first cylinder into a first fluid chamber and a second fluid chamber, and is connected to the other of the predetermined portion and the first portion of the transmission member.

  When the structure vibrates in the vibration mode of the primary mode and thereby the column is bent and deformed in the horizontal direction, for example, in the left-right direction (front-rear direction), the transmission member has a relatively high rigidity and thus hardly deforms. The portion on the other end side in the horizontal direction at the lower end of the transmission member rotates in the vertical direction around an axis extending in the front-rear direction (left-right direction) from the lower end of the one end in the horizontal direction, which is a joint portion with the column. It is displaced so as to move (see FIG. 4 described later). Therefore, the first cylinder and the first piston are connected to the upper part of the pillar of the structure via the transmission member as described above, and to the first part in the system composed of the lower part of the structure and the support body. Thus, the displacement due to the bending deformation generated by the vibration of the primary mode of the structure can be appropriately transmitted to the first cylinder and the first piston. Thereby, the damping force of the 1st damper which consists of a 1st cylinder, a 1st piston, and a working fluid can be made to act appropriately so that the bending deformation may be controlled via a transmission member.

  Further, the second cylinder extending in the horizontal direction is one of a predetermined second part in the system composed of the support and the lower part of the structure, and a predetermined third part of the structure above the second part. The second cylinder is connected to an object to be connected. The second cylinder is filled with a working fluid and a second piston is slidably provided. The second piston partitions the inside of the second cylinder into a third fluid chamber and a fourth fluid chamber, and is connected to a second piston connection target that is the other of the second and third portions. By connecting the second cylinder and the second piston to the second and third portions as described above, the displacement due to the shear deformation generated by the vibration of the primary mode of the structure is transferred to the second cylinder and the second piston. Can communicate properly. Thereby, the damping force of the 2nd damper which consists of a 2nd cylinder, a 2nd piston, and a working fluid can be made to act appropriately so that the shear deformation concerned may be controlled.

  Furthermore, when the structure is vibrated in one of the horizontal directions with respect to the support by vibrating in the vibration mode of the primary mode, the vibration suppressing device is connected to the first cylinder and the first cylinder from the transmission member and the first part. A force in the direction of moving the first piston toward the first fluid chamber acts on one piston, and the second and third pistons move from the second and third portions to the second cylinder and the second piston, and the second piston moves toward the third fluid chamber. It is comprised so that the force of the direction to move may act.

  In this case, the first and third fluid chambers communicate with each other via the first communication path, and the second and fourth fluid chambers communicate with each other via the second communication path. For this reason, when the structure is displaced to one side in the horizontal direction due to the vibration in the primary mode, the pressure acts on the second piston when the pressure acting on the first piston is larger than the pressure acting on the second piston. A part of the working fluid in the first fluid chamber is compressed into the third fluid chamber through the first communication path by compression by the first piston against the force in the direction of moving the second piston toward the third fluid chamber. A part of the working fluid in the fourth fluid chamber can be allowed to flow into the second fluid chamber via the second communication path. Therefore, the deformation obtained by adding the bending deformation and the shear deformation of the structure can be more appropriately suppressed by the action of the two dampers interlocking with each other, and the vibration of the structure can be sufficiently suppressed. In addition to the viscous damping effect of the working fluid in the first and second cylinders, the inertia effect by the flow of the working fluid through the first and second communication passages is further obtained by the operation of the two dampers. Such an effect also greatly contributes to suppression of vibration of the structure.

  Contrary to the above, when the pressure acting on the second piston is larger than the pressure acting on the first piston, it resists the force in the direction of moving the first piston toward the first fluid chamber acting on the first piston. Then, a part of the working fluid in the third fluid chamber is caused to flow into the first fluid chamber through the first communication path by compression by the second piston, and a part of the working fluid in the second fluid chamber is The fluid can flow into the fourth fluid chamber via the communication path. Therefore, the deformation obtained by adding the bending deformation and the shear deformation of the structure can be more appropriately suppressed by the action of the two dampers interlocking with each other, and the vibration of the structure can be sufficiently suppressed. In addition to the viscous damping effect of the working fluid in the first and second cylinders, the inertia effect by the flow of the working fluid through the first and second communication passages is further obtained by the operation of the two dampers. Such an effect also greatly contributes to suppression of vibration of the structure.

  As described above, according to the present invention, at the time of vibration of the structure, the two dampers having the first cylinder, the first piston, the second cylinder, and the second piston can be appropriately interlocked. The vibration of the object can be sufficiently suppressed.

  The invention according to claim 2 is the vibration suppression device for a structure according to claim 1, wherein the first and second portions are supports, and the third portion is a lower portion of the structure. .

  According to this configuration, since the first portion to which one of the first cylinder and the first piston is connected is the support body, the first damper including the first cylinder, the first piston, and the working fluid is connected to the structure 1 The displacement due to the bending deformation generated by the vibration in the next mode can be transmitted more appropriately. As a result, the damping force of the first damper can be applied more appropriately so as to suppress the bending deformation. In addition, a second part to which one of the second cylinder and the second piston is connected is a support, and a third part to which the other of the second cylinder and the second piston is connected is a lower part of the structure. Therefore, the displacement due to the shear deformation generated by the vibration of the primary mode of the structure can be more appropriately transmitted to the second damper including the second cylinder, the second piston, and the working fluid, and the damping force of the second damper can be transmitted. Further, it is possible to act more appropriately so as to suppress the shear deformation.

  According to a third aspect of the present invention, in the structure vibration suppressing device according to the first or second aspect, at least one of the second cylinder and the second piston is a second cylinder connection object and a second piston corresponding to at least one of the second cylinder and the second piston. It is connected to at least one of the objects to be connected via an elastic element.

  According to this configuration, at least one of the second cylinder and the second piston is connected to at least one of the second cylinder connection object and the second piston connection object corresponding to the at least one via the elastic element. As described above, one of the first cylinder and the first piston is connected to the structure via the transmission member. Thus, the transmission member, the inertia connecting element and the viscous element made of the working fluid are connected in series, and the elastic element and the inertia connecting element and the viscous element made of the working fluid are connected in series. Because of this relationship, an additional vibration system can be configured by these elements. Therefore, for example, the rigidity (spring constant) of the transmission member, the rigidity of the elastic element, the density and viscosity of the working fluid, the cross-sectional areas of the first and second cylinders, the passage area of the first and second communication paths, and the like By appropriately setting the specifications, the natural frequency of the additional vibration system can be tuned (resonated) with the primary natural frequency of the structure, and thereby the vibration energy of the structure can be tuned. By absorbing at, the vibration of the structure can be further suppressed.

  According to a fourth aspect of the present invention, in the vibration suppressing device for a structure according to the third aspect, the second piston is connected to the second piston connection target via the elastic element, and the elastic element is the second It is composed of a pair of cables extending in opposite directions in the horizontal direction with the piston in between, and provided in the second cylinder, and in a pair of cables arranged on the opposite sides in the horizontal direction with the second piston in between. One pulley and a pair of second pulleys that are connected to the second piston connection object and that are disposed on opposite sides in the horizontal direction with the second piston in between, and each of the pair of cables. The portion is wound around the first and second pulleys.

  According to this configuration, the second piston is connected to the second part in the system consisting of the support and the lower part of the structure via the pair of cables as the elastic elements, and the second part of the structure above the second part. It is connected with the 2nd piston connection object which is the other of three parts. The second cylinder is provided with a pair of first pulleys disposed on opposite sides in the horizontal direction with the second piston in between, and the second piston is connected to the second piston to be connected. A pair of second pulleys arranged on opposite sides in the horizontal direction are connected. Further, an intermediate portion of each of the pair of cables is wound around the first and second pulleys. With the above configuration, when the structure vibrates, one of the first and second pulleys functions as a so-called moving pulley with respect to the other, thereby increasing the displacement of the second piston in a state where the displacement due to the vibration of the structure is increased. Therefore, the amount of movement of the second piston and the amount of flow of the working fluid can be increased, and consequently the vibration suppressing effect of the structure can be enhanced.

  Further, the cable exhibits rigidity when a tensile force is applied, and does not exhibit rigidity because it is loosened when a compression force is applied. On the other hand, according to the present invention, since the pair of cables extend in the opposite directions in the horizontal direction with the second piston in between, one of the second and third portions is caused by the vibration in the primary mode. When repeatedly displaced to one side and the other side in the horizontal direction with respect to the other, the displacement can be appropriately transmitted to the second piston via both cables.

  According to a fifth aspect of the present invention, in the vibration suppressing device for a structure according to any one of the first to fourth aspects, at least one of the rotatable rotary mass and the first and second communication paths is provided, And a power conversion mechanism for converting the flow of the working fluid in the communication path into a rotary motion and transmitting the rotary fluid to the rotary mass.

  According to this configuration, at least one of the first and second communication passages is provided with a power conversion mechanism, and the flow of the working fluid in the at least one communication passage is caused to rotate by this power conversion mechanism. The converted state is transmitted to the rotating mass. As a result, when the structure vibrates, the rotating mass rotates as the working fluid flows through at least one of the communication passages as described above. Therefore, an inertia effect due to the rotating inertia of the rotating mass is added, so that the structure The effect of suppressing vibrations of objects can be further enhanced.

  According to a sixth aspect of the present invention, in the vibration suppressing device for a structure according to any one of the first to fourth aspects, the nut integrally attached to the second piston is screwed to the nut via a ball, and A screw shaft that is rotatable with respect to the nut, and a rotation mass provided on the screw shaft are further provided.

  According to this configuration, the nut is integrally attached to the second piston, and the rotatable screw shaft is screwed into the nut via the ball. The screw shaft is provided with a rotating mass. With the above configuration, when the structure vibrates, the screw shaft rotates together with the rotating mass as the second piston moves relative to the second cylinder together with the nut. By adding the inertia effect, the vibration suppressing effect of the structure can be further enhanced.

It is a figure which shows roughly the vibration suppression apparatus by 1st Embodiment of this invention with the structure to which this is applied. It is a figure which expands and shows the left vibration suppression apparatus by 1st Embodiment. It is a figure which expands and shows the vibration suppression apparatus etc. on the right side by 1st Embodiment. It is a figure for demonstrating operation | movement of the vibration suppression apparatus of FIG. 1 when a structure vibrates in the vibration mode of primary mode. FIG. 5 is a view different from FIG. 4 for explaining the operation of the vibration suppressing device of FIG. 1 when the structure vibrates in the vibration mode of the primary mode. It is a figure for demonstrating the relationship of the reaction force of the 1st damper on either side of FIG. 1 when a structure vibrates in the vibration mode of a primary mode. It is a figure which shows partially the 1st modification of a vibration suppression apparatus. It is sectional drawing which follows the VIII-VIII line of FIG. It is a figure which shows partially the 2nd modification of a vibration suppression apparatus. It is a figure which expands and shows the 2nd damper etc. of the vibration suppression apparatus by 2nd Embodiment of this invention. It is a figure which shows roughly and partially the vibration suppression apparatus in the case of providing a 1st damper and a transmission member in the outer side of a structure with the structure to which this is applied. It is a figure which shows schematically the vibration suppression apparatus at the time of providing a transmission member in the upper part of a structure, and connecting a 1st damper to a foundation beam via a wall part with the structure to which this is applied.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 show a vibration suppressing device according to a first embodiment of the present invention. The vibration suppressing device is for suppressing the vibration of the structure C, and includes a pair of left and right vibration suppressing devices 1L and 1R provided in the structure C. The structure C is, for example, a high-rise building, and has a ramen structure in which a plurality of pillars P extending in the vertical direction arranged side by side and a plurality of beams B extending in the horizontal direction arranged side by side are combined with each other. And is erected on the foundation beam F. The column P and the beam B are configured by joining a plurality of steel materials such as H-shaped steels in series. In FIG. 1, reference numerals of some components are omitted for convenience.

  As shown in FIGS. 1 and 2, the left vibration suppressing device 1 </ b> L includes a first damper 2, a second damper 3, and a transmission member 4. The first damper 2 includes a cylindrical first cylinder 21, a first piston 22 slidably provided in the first cylinder 21, a piston rod 23 partially accommodated in the first cylinder 21, and the like. It is configured.

  As shown in FIG. 2, the first cylinder 21 extends in the up-down direction and extends obliquely so that the upper end portion is located on the left side of the lower end portion, and the upper wall 21a and the lower wall 21b that face each other. And the peripheral wall 21c provided integrally between both 21a, 21b. Note that the first cylinder 21 may be provided so as to extend substantially straight in the vertical direction (substantially in the vertical direction). The oil chamber defined by the upper wall 21a, the lower wall 21b, and the peripheral wall 21c is partitioned by the first piston 22 into an upper first oil chamber 21d and a lower second oil chamber 21e. The oil chambers 21d and 21e are filled with hydraulic oil HF made of silicon oil. The setting of the cross-sectional area of the first cylinder 21 and the density and viscosity of the hydraulic oil HF will be described later.

  Further, a rod guide hole 21f penetrating in the vertical direction is formed in the radial center of each of the upper wall 21a and the lower wall 21b, and a seal 21g is provided in the rod guide hole 21f. Further, the lower wall 21b is integrally provided with a convex portion 21h protruding downward, and an accommodating portion 21i is defined inside the convex portion 21h. Furthermore, the convex portion 21h is provided with a first fixture FL1 via a universal joint, and the convex portion 21h is rotatable with respect to the first fixture FL1 by the universal joint. The first fixture FL1 is attached to the foundation beam F via a first connecting member EN1 made of steel having a trapezoidal front shape. Accordingly, the first cylinder 21 of the first damper 2 is connected to the foundation beam F.

  The first piston 22 is formed in a columnar shape, and a piston rod 23 is integrally provided at the center in the radial direction. Further, a seal 22a is provided on the peripheral surface of the first piston 22, and a plurality of holes penetrating in the vertical direction are formed in the outer end portion in the radial direction of the first piston 22 (two pieces). Only shown). A first relief valve 24 and a second relief valve 25 are provided in these holes, respectively.

  The first relief valve 24 includes a valve body and a spring that biases the valve body toward the valve closing side, and opens when the pressure of the hydraulic oil HF in the first oil chamber 21d reaches a predetermined value. Thereby, the first and second oil chambers 21d and 21e are communicated with each other. The second relief valve 25 is configured in the same manner as the first relief valve 24, and opens when the pressure of the hydraulic oil HF in the second oil chamber 21e reaches a predetermined value, whereby the first and first relief valves 25 are opened. The two oil chambers 21d and 21e communicate with each other.

  The piston rod 23 extends obliquely up and down from the first piston 22 and is inserted into the rod guide holes 21 f and 21 f of the first cylinder 21. Further, one end of the piston rod 23 is accommodated in the accommodating portion 21 i, and most of the portions other than the one end are accommodated in the first cylinder 21. Furthermore, the other end portion of the piston rod 23 is provided with a second fixture FL2 via a universal joint, and the piston rod 23 is rotatable with respect to the second fixture FL2 by a universal joint. . The second fixture FL2 is attached to the right end of the lower end portion of the transmission member 4 via a second connecting member EN2 made of a steel material having a triangular front shape, and the joint portion with the transmission member 4 is The transmission member 4 is positioned on an extension axis of an additional column 4a described later.

  The transmission member 4 includes an additional column 4a composed of a plurality of column members joined and fixed to each other in the vertical direction, and an X-shaped brace material 4b provided for each floor of the structure C. 4a and the brace material 4b are made of, for example, H-shaped steel and have elasticity. The additional pillar 4a extends in the vertical direction from the upper end of the structure C to the lower part in parallel with the pillar P. The lower end of the additional pillar 4a is joined to the beam B that supports the second floor portion of the structure C, and the lower end. The upper part of each part is joined to the corresponding beam B on each floor. In this way, the additional pillar 4a forms a cross-beam shaped ramen structure together with the pillar P and the beam B on each floor. In the present embodiment, the center of the joining position of the additional column 4a to the beam B is that of the column P on which the transmission member 4 is provided, where L is the distance between the respective axes of the pair of adjacent columns P and P. It is set at a position of L / 4 from the axis (see FIG. 1).

  Further, the brace material 4b is joined to each of the four floors, which are composed of two joints between the pillar P and the beam B and two joints between the additional pillar 4a and the beam B on each floor. Thereby, the rigidity of the rigid frame structure which consists of the pillar P, the beam B, and the additional pillar 4a is improved.

  As described above, a part of the pillar P and the beam B of the structure C are used as the transmission member 4, and the transmission member 4 is configured as described above, so that the rigidity is higher than that of the pillar P. have. The setting of the rigidity of the transmission member 4 will be described later.

  The second damper 3 is surrounded by the base beam F, the beam B supporting the second floor portion of the structure C, the column P provided with the transmission member 4, and the column P adjacent to the left side of the column P. Are arranged in a designated space. In the following description and FIG. 2, the pillars P located on the left side and the right side as viewed from the second damper 3 are referred to as “left pillar PL” and “right pillar PR”, respectively. The second damper 3 includes a cylindrical second cylinder 31 and a second piston 32 slidably provided in the second cylinder 31.

  The second cylinder 31 extends in the left-right direction, and includes a left wall 31a and a right wall 31b facing each other, and a peripheral wall 31c provided integrally between the both 31a and 31b. The setting of the cross-sectional area of the second cylinder 31 will be described later. The oil chambers defined by the left wall 31a, the right wall 31b, and the peripheral wall 31c are separated by the second piston 32 into the right (inside) third oil chamber 31d and the left (outside) fourth oil chamber 31e. The oil chambers 31d and 31e are filled with hydraulic oil HF. Further, a cable guide hole (not shown) penetrating in the left-right direction is formed in the radial center of each of the left wall 31a and the right wall 31b, and a seal (not shown) is formed in the cable guide hole. Is provided. Further, the peripheral wall 31 c is attached to the connecting portion 5 b of the support member 5.

  The support member 5 is, for example, a brace made of H-shaped steel, and is composed of left and right oblique members 5a and 5a, and has elasticity. The setting of the rigidity (spring constant) of the support member 5 will be described later. The left and right diagonal members 5a, 5a are connected at their upper ends to the joints between the left and right pillars PL, PR and the beam B supporting the second floor portion, and extend to the vicinity of the foundation beam F. Further, the lower end portions of the left and right diagonal members 5a and 5a are connected to each other and form the connecting portion 5b. With the above configuration, the second cylinder 31 of the second damper 3 is connected to the lower part of the structure C via the support member 5.

  The second piston 32 is formed in a columnar shape, and a seal 32a is provided on the peripheral surface thereof. Further, a plurality of holes penetrating in the left-right direction are formed in the outer end portion of the second piston 32 in the radial direction (only two are shown), and the third relief valve 33 and the fourth hole are formed in these holes. Relief valves 34 are respectively provided. These third and fourth relief valves 33 and 34 are respectively configured in the same manner as the first and second relief valves 24 and 25 described above. The third relief valve 33 opens when the pressure of the hydraulic oil HF in the third oil chamber 31d reaches a predetermined value, whereby the third and fourth oil chambers 31d and 31e are communicated with each other. The fourth relief valve 34 is opened when the pressure of the hydraulic oil HF in the fourth oil chamber 31e reaches a predetermined value, whereby the third and fourth oil chambers 31d and 31e are communicated with each other.

  The vibration suppressing device 1L includes a pair of left and right cables 6L and 6R partially accommodated in the second cylinder 31, a pair of left and right first pulleys 7L and 7R attached to the second cylinder 31, and a foundation beam F. And a pair of left and right second pulleys 8L and 8R connected to each other. The left and right cables 6L and 6R are made of, for example, a steel wire and have elasticity. The rigidity (spring constant) of the left and right cables 6L and 6R is set to the same size, and the setting will be described later. One end of the left cable 6L is attached to the left end of the second piston 32 and the center in the radial direction, extends leftward from the second piston 32, and the cable of the left wall 31a of the second cylinder 31 The guide hole is inserted through a seal. The other end of the left cable 6L is attached to the left connecting portion 9L. The left connecting portion 9L is made of, for example, an H-shaped steel, and is attached to the foundation beam F and the left column PL.

  The left first pulley 7L is attached to the left wall 31a of the second cylinder 31, and the left second pulley 8L is attached to the left connecting portion 9L. The left cable 6L is wound around the first and second pulleys 7L and 8L at an intermediate portion thereof, and is given a predetermined tension.

  One end of the right cable 6R is the right end of the second piston 32 and is attached to the center in the radial direction. The right cable 6R extends rightward from the second piston 32, and the cable of the right wall 31b of the second cylinder 31 The guide hole is inserted through a seal. The other end of the right cable 6R is attached to the right connecting portion 9R. The right connecting portion 9R is made of, for example, H-shaped steel like the left connecting portion 9L, and is attached to the foundation beam F and the right column PR. With the above configuration, the second piston 32 of the second damper 3 is connected to the foundation beam F via the left and right cables 6L and 6R and the left and right connecting portions 9L and 9R.

  The right first pulley 7R is attached to the right wall 31b of the second cylinder 31, and the right second pulley 8R is attached to the right connecting portion 9R. The right cable 6R is wound around the first and second pulleys 7R and 8R at an intermediate portion thereof, and a tension having the same magnitude as the tension of the left cable 6L is applied.

  Furthermore, the vibration suppression device 1L includes a first communication path 10 and a second communication path 11. The first communication passage 10 is connected to the first and second cylinders 21 and 31 so that the first oil chamber 21d and the third oil chamber 31d communicate with each other. The connection portion of the first communication passage 10 with the first cylinder 21 is located at the upper end portion of the peripheral wall 21c of the first cylinder 21, and the connection portion of the first communication passage 10 with the second cylinder 31 is the second portion. It is located at the right end of the peripheral wall 31c of the cylinder 31.

  The second communication passage 11 is connected to the first and second cylinders 21 and 31 so that the second oil chamber 21e and the fourth oil chamber 31e communicate with each other. The connection portion of the second communication passage 11 with the first cylinder 21 is located at the lower end portion of the peripheral wall 21c of the first cylinder 21, and the connection portion of the second communication passage 11 with the second cylinder 31 is the second portion. It is located at the left end of the peripheral wall 31c of the cylinder 31. Setting of the passage areas of the first and second communication passages 10 and 11 will be described later.

  In the vibration suppressing device 1L having the above configuration, when the structure C is stationary, the first and second pistons 22 and 32 are in the neutral position shown in FIG.

  As shown in FIGS. 1 and 3, the right vibration suppression device 1 </ b> R is configured in the same manner as the left vibration suppression device 1 </ b> L described above, and is different only in that it is arranged symmetrically. Because of this difference, the positional relationship between the third and fourth oil chambers 31d and 31e of the second cylinder 31 of the vibration suppression device 1R is the same as the third and fourth oil chambers 31d and 31d of the second cylinder 31 of the vibration suppression device 1L. The positional relationship of 31e is reversed to the left and right. That is, the third oil chamber 31d of the second cylinder 31 of the vibration suppression device 1R is located on the left side of the second piston 32, and the fourth oil chamber 31e is located on the right side of the second piston 32. The connection portion of the first communication passage 10 with the second cylinder 31 of the vibration suppression device 1R is located at the left end portion of the peripheral wall 31c of the second cylinder 31, and the connection of the second communication passage 11 with the second cylinder 31. The portion is located at the right end of the peripheral wall 31 c of the second cylinder 31.

  Next, an example of the operation of the right vibration suppression device 1R when the structure C vibrates in the primary mode vibration mode will be described with reference to FIGS. As indicated by a two-dot chain line in FIG. 1, the vibration of the structure C in the primary mode is performed in such a manner that the upper end side repeatedly reciprocates in the left-right direction. In this case, the direction of displacement due to bending deformation of the structure C and the direction of displacement due to shear deformation are the same, and the degree of bending deformation due to vibration of the structure C is higher in the upper part of the structure C. The degree of shear deformation due to the vibration of the structure C becomes greater as the lower part of the structure C is.

  Further, when the structure C is displaced to the right side with respect to the foundation beam F by the vibration of the primary mode, as shown in FIG. 4, the joint portion between the right additional column 4a and the beam B is adjacent to the additional column 4a. About the axis extending in the front-rear direction (the depth direction in the figure) from the joint portion of the right column P and the beam B, it is displaced so as to rotate upward. As a result, the displacement of the structure C is transmitted to the first damper 2 via the transmission member 4. Moreover, the displacement of the lower part of the structure C with respect to the foundation beam F is transmitted to the 2nd damper 3 via the support member 5 and the cables 6L and 6R.

  As described above, as shown by the grid-shaped hatched arrows in FIG. 5, the force in the direction of moving the first piston 22 from the structure C and the foundation beam F to the first piston 22 toward the first oil chamber 21d ( Force acting to extend the first damper 21) and a force in a direction to move the second piston 32 toward the third oil chamber 31 d from the structure C and the foundation beam F to the second piston 32. .

  In this operation example, since the pressure acting on the first piston 22 from the structure C and the foundation beam F is larger than the pressure acting on the second piston 32 from the structure C and the foundation beam F, as shown in FIG. The first piston 22 moves from the neutral position shown in FIG. 2 to the first oil chamber 21d side, and the hydraulic oil HL in the first oil chamber 21d is compressed by the first piston 22. Thereby, a part of the hydraulic oil HF in the first oil chamber 21d is a force in a direction in which the second piston 32 is moved from the structure C and the foundation beam F to the third fluid chamber 31d acting on the second piston 32. Against this, it flows into the third oil chamber 31d through the first communication passage 10. As a result, the second piston 32 moves from the neutral position shown in FIG. 2 to the fourth oil chamber 31e side, whereby a part of the hydraulic oil HF in the fourth oil chamber 31e passes through the second communication passage 11. Into the second oil chamber 21e. In FIG. 5, the flow direction of the hydraulic oil HF is indicated by arrows attached in the vicinity of the first and second communication passages 10 and 11.

  Moreover, FR shown in FIG. 4 represents the reaction force of the 1st damper 21 of the vibration suppression apparatus 1R. As shown in the figure, the reaction force FR of the first damper 21 acts to push back the joint portion between the right additional column 4a and the beam B, that is, via the transmission member 4, the structure C It acts to suppress bending deformation due to vibration of the first mode. Further, as is clear from FIG. 5, the reaction force of the second damper 31 acts to suppress shear deformation in the lower part of the structure C.

  Although not shown, when the structure C is displaced to the left with respect to the foundation beam F due to the vibration of the primary mode, the displacement of the structure C is transmitted to the first and second dampers 2 and 3, A force in the direction of moving the first piston 22 toward the second oil chamber 21e (force that shortens the first damper 21) acts on the first piston 22 from the structure C and the foundation beam F, and the structure A force in the direction of moving the second piston 32 to the fourth oil chamber 31e acts on the second piston 32 from C and the foundation beam F.

  In this case, since the pressure acting on the first piston 22 from the structure C and the foundation beam F is larger than the pressure acting on the second piston 32 from the structure C and the foundation beam F, the first piston 22 is in the second oil. It moves to the chamber 21 e side, and the hydraulic oil HL in the second oil chamber 21 e is compressed by the first piston 22. As a result, a part of the hydraulic oil HF in the second oil chamber 21e causes a force in a direction to move the second piston 32 from the structure C and the foundation beam F to the fourth fluid chamber 31e acting on the second piston 32. Against this, it flows into the 4th oil chamber 31e via the 2nd communicating path 11. Accordingly, when the second piston 32 moves to the third oil chamber 31d side, a part of the hydraulic oil HF in the third oil chamber 31d flows into the first oil chamber 21d via the first communication passage 10. To do.

  Further, since the operation of the right vibration suppression device 1R during the vibration of the structure C as described above is similarly performed in the left vibration suppression device 1L, the operation of the vibration suppression device 1L will be briefly described below. When the structure C is displaced to the right side with respect to the foundation beam F by the vibration of the primary mode, as shown in FIG. 4, the joint portion between the left additional column 4a and the beam B is adjacent to the additional column 4a. It is displaced so as to rotate downward about an axis extending in the front-rear direction (depth direction in the figure) from the joint portion of the left column P and the beam B. As a result, the first damper 2 is shortened, and the reaction force FL of the first damper 2 pushes back the joint portion between the left additional column 4a and the beam B, that is, in the primary mode of the structure C. It acts to suppress bending deformation due to vibration.

  On the other hand, when the structure C is displaced to the left side with respect to the foundation beam F by the vibration in the primary mode, the joint portion between the left additional column 4a and the beam B is rotated upward about the axis. As a result, the first damper 2 is expanded, and in this case as well, the reaction force FL of the first damper 2 acts to suppress bending deformation due to vibration of the primary mode of the structure C. Since the operations of the second damper 3 and the working fluid HF of the left vibration suppression device 1L are the same as those of the right vibration suppression device 1R, description thereof is omitted.

  As described above, according to the first embodiment, the first cylinder 21 extending in the up-down direction is connected to the foundation beam F, the inside of the first cylinder 21 is filled with the hydraulic oil HF, and the first One piston 22 is slidably provided. The first piston 22 divides the inside of the first cylinder 21 into a first oil chamber 21d and a second oil chamber 21e, and is connected to the right end (left end) of the lower end portion of the transmission member 4. By connecting the first cylinder 21 and the first piston 22 to the transmission member 4 and the foundation beam F as described above, the displacement due to the bending deformation caused by the vibration of the primary mode of the structure C can be reduced. Thus, it is possible to appropriately transmit to the first cylinder 21 and the first piston 22.

  Further, a second cylinder 31 extending in the horizontal direction is connected to a beam B provided at the lower part of the structure C. The second cylinder 31 is filled with hydraulic oil HF and the second piston. 32 is slidably provided. The second piston 32 partitions the inside of the second cylinder 31 into a third oil chamber 31d and a fourth oil chamber 31e and is connected to the foundation beam F. By connecting the second cylinder 31 and the second piston 32 to the beam B and the base beam F as described above, the displacement due to the shear deformation generated by the vibration of the primary mode of the structure C can be reduced. It can be appropriately transmitted to the second piston 32.

  Furthermore, as described with reference to FIG. 5, the vibration suppressing device 1 </ b> R has the structure C when the structure C is displaced to the right side with respect to the foundation beam F by vibrating in the vibration mode of the primary mode. A force in a direction to move the first piston 22 toward the first oil chamber 21d acts on the first cylinder 21 and the first piston 22 from the foundation beam F and the second cylinder 31 from the structure C and the foundation beam F. The second piston 32 is configured such that a force in the direction of moving the second piston 32 toward the third oil chamber 31d acts on the second piston 32.

  In this case, the first and third oil chambers 21d and 31d communicate with each other via the first communication passage 10, and the second and fourth oil chambers 21e and 31e communicate with each other via the second communication passage 11. Communicate. In addition, since the pressure acting on the first piston 22 from the structure C and the foundation beam F is larger than the pressure acting on the second piston 32, the third oil acting on the second piston 32 from the structure C and the foundation beam F. A part of the hydraulic oil HF in the first oil chamber 21d is compressed through the first communication passage 10 by the compression of the first piston 22 against the force in the direction of moving the second piston 32 to the chamber 31d side. While flowing into the third oil chamber 31d, a part of the hydraulic oil HF in the fourth oil chamber 31e can be allowed to flow into the second oil chamber 21e via the second communication passage 11. Therefore, in addition to the viscous damping effect of the hydraulic oil HF in the first and second cylinders 21 and 31, an inertia effect due to the flow of the hydraulic oil HF through the first and second communication passages 10 and 11 is further obtained.

  Furthermore, when the structure C is displaced to the left side with respect to the foundation beam F by vibrating in the first mode vibration mode, the vibration suppressing device 1R moves from the structure C and the foundation beam F to the first cylinder 21 and the first cylinder 21. A force in the direction of moving the first piston 22 toward the second oil chamber 21e acts on the first piston 22, and the second piston 32 is moved from the structure C and the foundation beam F to the second cylinder 31 and the second piston 32. Is configured such that a force in the direction of moving the oil toward the fourth oil chamber 31e acts.

  In this case, since the pressure acting on the first piston 22 from the structure C and the foundation beam F is greater than the pressure acting on the second piston 32, the fourth acting on the second piston 32 from the structure C and the foundation beam F. A part of the hydraulic oil HF in the second oil chamber 21e is compressed by the first piston 22 through the second communication passage 11 against the force in the direction of moving the second piston 32 toward the oil chamber 31e. While flowing into the fourth oil chamber 31e, part of the hydraulic oil HF in the third oil chamber 31d can be allowed to flow into the first oil chamber 21d via the first communication passage 10. Therefore, in addition to the viscous damping effect of the hydraulic oil HF in the first and second cylinders 21 and 31, an inertia effect due to the flow of the hydraulic oil HF through the first and second communication passages 10 and 11 is further obtained.

  As is clear from the above, when the structure C vibrates in the primary mode vibration mode and is repeatedly displaced to the left and right with respect to the foundation beam F, the operation in the first and second cylinders 21 and 31 is performed. By obtaining the viscous damping effect of the oil HF and the inertia effect due to the flow of the hydraulic oil HF via the first and second communication passages 10 and 11, vibration of the structure C can be sufficiently suppressed. In this case, since the vibration suppressing device is composed of a pair of left and right vibration suppressing devices 1L and 1R, this effect can be obtained more effectively.

  As described above, according to the first embodiment, when the structure C vibrates, the first damper 2 having the first cylinder 21 and the first piston 22 and the second cylinder 31 having the second piston 32 are provided. The damper 3 can be appropriately interlocked, and thereby the vibration of the structure C can be sufficiently suppressed.

  FIG. 5 shows an example in which the pressure acting on the first piston 22 from the structure C and the foundation beam F is larger than the pressure acting on the second piston 32, but on the contrary, the structure C And when the pressure which acts on the 2nd piston 32 from the foundation beam F is larger than the pressure which acts on the 1st piston 22, the vibration suppression apparatus 1R operate | moves as follows.

  That is, when the structure C is displaced to the right side with respect to the foundation beam F by vibrating in the primary mode vibration mode, the first oil chamber 21d side acting on the first piston 22 from the structure C and the foundation beam F Against the force in the direction in which the first piston 22 is moved, a part of the hydraulic oil HF in the third oil chamber 31d is compressed by the second piston 32 via the first communication passage 10 to the first oil chamber. While flowing into 21d, a part of the hydraulic oil HF in the second oil chamber 21e can be allowed to flow into the fourth oil chamber 31e via the second communication passage 11. Therefore, in addition to the viscous damping effect of the hydraulic oil HF in the second and first cylinders 31, 21, an inertia effect due to the flow of the hydraulic oil HF via the first and second communication passages 10, 11 is further obtained.

  Further, when the structure C is displaced to the left with respect to the foundation beam F by vibrating in the primary mode vibration mode, the second oil chamber 21e side acting on the first piston 22 from the structure C and the foundation beam F is provided. Against the force in the direction in which the first piston 22 is moved, a part of the hydraulic oil HF in the fourth oil chamber 31e is compressed by the second piston 32 via the second communication passage 11 by the second oil chamber 31e. 21e and a part of the hydraulic oil HF in the first oil chamber 21d can be allowed to flow into the third oil chamber 31d via the first communication passage 10. Therefore, in addition to the viscous damping effect of the hydraulic oil HF in the second and first cylinders 31, 21, an inertia effect due to the flow of the hydraulic oil HF via the first and second communication passages 10, 11 is further obtained.

  As described above, even when the pressure acting on the second piston 32 from the structure C and the foundation beam F is larger than the pressure acting on the first piston 22, the structure C and the foundation beam F are transferred to the first piston 22. Similarly to the case where the acting pressure is larger than the pressure acting on the second piston 32, the first and second dampers 2, 3 can be appropriately interlocked, thereby sufficiently suppressing the vibration of the structure C. can do.

  Further, the first piston 22 is connected to the column P of the structure C via the transmission member 4. Further, the second cylinder 31 is connected to the lower part of the structure C via the support member 5, and the second piston 32 is connected to the foundation beam F via the left and right cables 6L and 6R. With the above configuration, the inertia connecting element and the viscous element made of the hydraulic oil HF and the elastic transmission member 4 are connected in series, and the inertia connecting element and the viscous element made of the hydraulic oil HF, and the elasticity Since the second support member 5 having left and right and left cables 6L and 6R are connected in series, the additional vibration system can be configured by these elements.

  Further, the rigidity (spring constant) of the transmission member 4, the support member 5, and the left and right cables 6L and 6R, the density and viscosity of the hydraulic oil HF, the first and second cylinders 21 and 31 (first and second pistons 22). 32) and the dimensions of the first and second communication passages 10 and 11, such as the cross-sectional area, the natural frequency of the additional vibration system is tuned to the primary natural frequency of the structure C (resonance). ) Is set to. Thereby, the vibration of the structure C can be suppressed more favorably by absorbing the vibration energy of the structure C with the additional vibration system. Further, the reaction force FL (FR) of the first and second dampers 2 and 3 can be changed by adjusting the cross-sectional areas of the first and second pistons 22 and 32, respectively. The larger the cross-sectional area of the two pistons 22 and 32, the larger.

  FIG. 6 shows the relationship between the reaction forces FL and FR of the first dampers 2 and 2 of the left and right vibration suppression devices 1L and 1R when the structure C vibrates in the primary mode vibration mode. As is apparent from the figure, the vertical component of the reaction force FL of the left first damper 2 acts to press the foundation beam F downward, and the reaction force FR of the right first damper 2 is reduced. The component force in the vertical direction acts to press the foundation beam F upward. In this way, the vertical component forces of the reaction forces FL and FR of the left and right first dampers 2 and 2 can be made to cancel each other, and accordingly, the first dampers 2 and 2 to the foundation beam F The burden of the reaction forces FL and FR can be reduced. In order to obtain the effect, it is preferable that the connecting portions of the left and right first dampers 2 and 2 to the foundation beam F be as close as possible in the left and right direction (horizontal direction).

  Further, the second cylinder 31 is provided with a pair of first pulleys 7L and 7R disposed on the opposite sides in the left-right direction with the second piston 32 interposed therebetween. A pair of second pulleys 8 </ b> L and 8 </ b> R disposed on opposite sides in the left-right direction with 32 therebetween are connected. Furthermore, the middle part of each of the left and right cables 6L, 6R is wound around the first and second pulleys 7L, 7R, 8L, 8R. With the above configuration, when the structure C vibrates, one of the first and second pulleys 7L, 7R, 8L, and 8R functions as a so-called moving pulley with respect to the other, and thereby the displacement due to the vibration of the structure C Is transmitted to the second piston 32 in an increased state, the movement amount of the second piston 32 and the flow amount of the hydraulic oil HF can be increased, and the vibration suppressing effect of the structure C can be enhanced.

  Further, since the left and right cables 6L and 6R extend in opposite directions in the left-right direction with the second piston 32 in between, the structure C is moved to the left and right with respect to the foundation beam F by the vibration of the primary mode. When repeatedly displaced (see the two-dot chain line in FIG. 1), the displacement of the structure C can be appropriately transmitted to the second piston 32 via both cables 6L, 6R.

  Furthermore, when the pressure of the hydraulic oil HF in the first oil chamber 21d or the second oil chamber 21e reaches a predetermined value, the first relief valve 24 or the second relief valve 25 provided in the first piston 22 is opened. Then, by making the first and second oil chambers 21d and 21e communicate with each other, the pressure of the hydraulic oil HF is released from one of the oil chambers 21d and 21e to the other. Furthermore, when the pressure of the hydraulic oil HF in the third oil chamber 31d or the fourth oil chamber 31e reaches a predetermined value, the third relief valve 33 or the fourth relief valve 34 provided in the second piston 32 is opened. Then, by making the third and fourth oil chambers 31d and 31e communicate with each other, the pressure of the hydraulic oil HF is released from one of the oil chambers 31d and 31e to the other. As described above, by restricting the inertial effect and the viscous damping force due to the hydraulic oil HF, the overload state of the vibration suppressing device such as an excessive tensile load exceeding the elastic limit acting on the left and right cables 6L and 6R is prevented. Can do.

  Furthermore, since a predetermined tension is applied to the left and right cables 6L and 6R, until the moving amount of the second piston 32 reaches the tensile amount of the left cable 6L or the right cable 6R due to the tension when the structure C vibrates. Since the reaction forces of the two cables 6L and 6R act, the spring constant k of the left and right cables 6L and 6R is the sum of the spring constants k1 and k2 of both the cables 6L and 6R (= k1 + k2). On the other hand, after the moving amount of the second piston 32 reaches the tensile amount of the left cable 6L or the right cable 6R due to the tension, the tension of one cable disappears and only the reaction force of the other cable acts. Therefore, the spring constant k of the entire left and right cables 6L and 6R becomes the spring constant k1 of the left cable 6L or the spring constant k2 of the right cable 6R.

  In this way, by applying tension to the left and right cables 6L and 6R in advance, a bilinear characteristic can be obtained as the rigidity characteristic of the elastic element including both the cables 6L and 6R with respect to the displacement of the structure C. Therefore, for example, the rigidity of the elastic element is switched to a smaller value (k1 or k2) before the reaction force of the vibration suppressing device becomes excessive as the displacement of the structure C due to vibration increases. It becomes possible. Thereby, by making the natural frequency of the additional vibration system different from the natural frequency of the structure, it is possible to prevent an excessive reaction force of the vibration suppressing device.

  7 and 8 show a first modification of the vibration suppressing device. In the first modified example, a gear pump 41 and a first rotating mass 47 for providing an inertia effect due to rotational inertia are provided in the middle of the first and second communication passages 10 and 11, respectively. 7 and 8, only the configuration of the first communication path 10 is shown, and the second communication path 11 is omitted.

  As shown in FIGS. 7 and 8, the gear pump 41 includes a casing 42 and a first gear 43 and a second gear 44 accommodated in the casing 42. The casing 42 has a larger flow path area than the first communication path 10 and communicates with the first communication path 10 via two entrances 42a and 42a facing each other.

  The first gear 43 is a spur gear and is provided integrally with the first rotating shaft 45. The first rotating shaft 45 is rotatably supported by the casing 42, extends horizontally in a direction orthogonal to the first communication path 10, and slightly protrudes from the casing 42. Similar to the first gear 43, the second gear 44 is configured by a spur gear, is provided integrally with the second rotating shaft 46, and meshes with the first gear 43. The second rotating shaft 46 is rotatably supported by the casing 42 and extends in parallel with the first rotating shaft 45. Further, the meshing portions of the first and second gears 43 and 44 face the entrances 42 a and 42 a of the casing 42.

  The first rotating mass 47 is made of a material having a relatively large specific gravity, for example, a disc made of iron. The first rotating mass 47 is concentrically attached to the first rotating shaft 45 and rotates integrally with the first gear 43 and the first rotating shaft 45.

  With the above configuration, in the first modification, as the structure C vibrates, the hydraulic oil HF flows into the casing 42 when flowing through the first and second communication passages 10 and 11 as described above. The first and second gears 43 and 44 are rotationally driven by the hydraulic oil HF, and the first rotary mass 47 integral with the first gear 43 rotates. As described above, the flow of the hydraulic oil HF is converted into the rotational motion by the gear pump 41 and the first rotary mass 47 is rotated, whereby the inertial effect and the viscous damping effect of the hydraulic oil HF according to the first embodiment are reduced to the first. Since the inertia effect by the rotation inertia of the rotation mass 47 is added, the vibration suppression effect of the structure C can be further enhanced.

  Further, in the vibration suppressing device according to the first modification, the inertia connecting element composed of the first rotating mass 47 is added in parallel to the inertia connecting element composed of the hydraulic oil HF. Therefore, in the case of the first modification, the specifications for determining the natural frequency of the additional vibration system include the volume efficiency of the gear pump 41 and the first rotational mass in addition to the above-described specifications in the case of the first embodiment. 47 masses and diameters are included. Therefore, the natural frequency of the additional vibration system can be tuned to the primary natural frequency of the structure C by appropriately setting these specifications.

  FIG. 9 shows a second modification of the vibration suppressing device. In this second modification, a second rotation mass 51 is further added to the first rotation mass 47 of the first modification described above. In FIG. 9, the same components as those of the first modification shown in FIGS. 7 and 8 are denoted by the same reference numerals.

  As shown in FIG. 9, the first rotation shaft 45 described above extends beyond the first rotation mass 47 to the opposite side of the casing 42, and the second rotation rotates via a viscoelastic rubber 52 at the tip thereof. A mass 51 is provided concentrically. Similar to the first rotating mass 47, the second rotating mass 51 is made of, for example, a disk made of iron, and the diameter thereof is smaller than that of the first rotating mass 47. The viscoelastic rubber 52 has both viscosity and elasticity.

  With the above configuration, in the second modification, when the first rotating shaft 45 and the first rotating mass 47 rotate as the structure C vibrates, the rotation of the first rotating shaft 45 causes the viscoelastic rubber 52 to rotate. To the second rotating mass 51. Thereby, since the inertia effect by the rotation inertia of the 2nd rotation mass 51 is further added when the 2nd rotation mass 51 rotates, the damping effect of the structure C can further be heightened.

  In the vibration suppression device of the second modification having the above-described configuration, the inertial connection element made of the second rotating mass 51, the elastic element made of the viscoelastic rubber 52, and the viscous element are connected in series, and these elements are It becomes the relationship connected in parallel to the element which consists of the hydraulic oil HF of the vibration suppression apparatus of 1 modification, the 1st rotation mass 47, etc. FIG.

  From the above relationship, in the vibration suppressing device of the second modified example, the first additional vibration system including the hydraulic oil HF and the first rotating mass 47 according to the first modified example and the second rotating mass 51 are added as the additional vibration system. The second additional vibration system composed of the above and the like exist separately from each other. In this case, since the specifications of the second additional vibration system are also set so as to tune to the primary natural frequency of the structure C, the combined natural frequency of the first and second additional vibration systems is set to the structure It is possible to multiplex-tune to the primary natural frequency of the object C, and thus more appropriately suppress the vibration of the structure C due to the primary mode. In this case, the specifications of the first additional vibration system are as described above in the case of the first modification, and the specifications of the second additional vibration system include the mass and diameter of the second rotating mass 51, viscoelastic rubber. 52 spring constant and viscosity are included.

  In the second modification, the viscoelastic rubber 52 having viscosity and elasticity is used, but a rubber or spring having only elasticity may be used. Moreover, in the 1st and 2nd modification, although the gear pump 41 and the 1st rotation mass 47 are provided in both the 1st and 2nd communication paths 10 and 11, you may provide only in any one of these. .

  Furthermore, in the first and second modified examples, a gear pump mechanism having the gear pump 41 is used as a mechanism for converting the flow of the hydraulic oil HF into the rotation of the first rotating mass 47. You may use the screw mechanism which has the screw blade | wing rotated by the flow of oil HF. In this case, it is possible to adjust the inertial effect of the hydraulic oil HF by changing the angle of the screw blades. Alternatively, instead of the gear pump mechanism, a ball screw in which a piston described in FIG. 2 of Japanese Patent No. 5161395 by the present applicant is integrally provided on a nut, a vane motor, or the like may be used.

  Furthermore, in the first and second modifications, the second damper 3 and the first rotating mass 47 (second rotating mass 51) are configured as so-called passive dampers, but are configured as so-called active dampers. The wind of the structure C may be prevented by forcibly driving the first rotating mass 47 (second rotating mass 51) with an electric motor.

  Next, a vibration suppressing device according to a second embodiment of the present invention will be described with reference to FIG. This vibration suppression device is mainly different from the first embodiment in the configuration of the second damper 61. FIG. 10 shows an enlarged view of the second damper 61 and the like of the vibration suppression device on the right side. In FIG. 10, the same components as those described in the first embodiment are denoted by the same reference numerals. . Hereinafter, a description will be given focusing on differences from the first embodiment.

  The second damper 61 includes a second cylinder 62, a second piston 63, a nut 64, a screw shaft 65, and a pair of left and right rotating masses 66, 66. The configuration of the second cylinder 62 is basically the same as the configuration of the second cylinder 31 of the first embodiment, and the second cylinder 62 includes left and right walls 62a and 62b and a peripheral wall 62c.

  Each of the left wall 62a and the right wall 62b is formed with a screw shaft guide hole (not shown) penetrating in the left-right direction at the center in the radial direction, and above and below the screw shaft guide hole, A cable guide hole (not shown) penetrating in the left-right direction is formed. Each of the screw shaft guide hole and the cable guide hole is provided with a seal (not shown). The oil chamber defined by the left wall 62a, the right wall 62b, and the peripheral wall 62c is partitioned by the second piston 63 into a left third oil chamber 62d and a right fourth oil chamber 62e. 62d and 62e are filled with hydraulic oil HF. The third oil chamber 62d communicates with the first oil chamber 21d of the first cylinder 21 described above via the first communication passage 10, and the fourth oil chamber 62e is described above via the second communication passage 11. The first cylinder 21 communicates with the second oil chamber 21e. In FIG. 10, for convenience, the first and second communication paths 10 and 11 are omitted in the middle.

  A pair of rails 62f and 62f are integrally provided on the inner surface of the peripheral wall 62c of the second cylinder 62. For convenience, in FIG. 10, hatching indicating a cross section of the rails 62 f and 62 f is omitted. As shown in FIG. 10, both 62f and 62f are arranged so as to slightly protrude in the radial direction of the second cylinder 62 and to face each other in the radial direction. Each rail 62 f extends in the left-right direction over the entire portion between the connection portion of the second cylinder 62 with the first communication passage 10 and the connection portion with the second communication passage 11.

  The second piston 63 is formed in a cylindrical shape and is slidably provided in the second cylinder 62. In FIG. 10, the hatching of the second piston 63 is omitted for convenience. A pair of recesses (not shown) extending in the left-right direction are formed on the outer end portion of the second piston 63 in the radial direction, and these pair of recesses are sealed with the rails 62f and 62f (see FIG. (Not shown). These recesses and rails 62f and 62f prevent the rotation of the second piston 63 relative to the second cylinder 62. The second piston 63 is provided with third and fourth relief valves 67 and 68 configured in the same manner as the third and fourth relief valves 33 and 34 of the first embodiment, respectively.

  The nut 64 is formed in a cylindrical shape, and is attached to the central portion in the radial direction of the second piston 63. The screw shaft 65 is screwed into the nut 64 via a plurality of balls (not shown) and extends from the nut 64 to the left and right. That is, the nut 64, the ball, and the screw shaft 65 constitute a ball screw. The screw shaft 65 is inserted into the screw shaft guide holes of the left and right walls 62a and 62b of the second cylinder 62 via a seal, and radial bearings 70 and 70 are provided to the left and right connecting portions 69L and 69R. Each is supported rotatably.

  The left and right connecting portions 69L and 69R are made of H-shaped steel like the left and right connecting portions 9L and 9R of the first embodiment, and are not attached to the left and right pillars PL and PR. Only attached to. The left connecting portion 69L is disposed between the left column PL and the second cylinder 62, and the right connecting portion 69R is disposed between the right column PR and the second cylinder 62. Further, the left and right connecting portions 69L and 69R are formed with screw shaft support holes penetrating in the left-right direction, and the radial bearing 70 is provided in each screw shaft support hole.

  Further, the screw shaft 65 extends to the left side of the left connecting portion 69L and extends to the right side of the right connecting portion 69R. Further, a friction material 71 is attached to the left end portion and the right end portion of the screw shaft 65, and the friction material 71 is made of a material having a relatively stable friction coefficient, for example, Teflon (registered trademark). Yes. Thrust bearings 72 are provided between the left friction material 71 and the left connecting portion 69L and between the right friction material 71 and the right connecting portion 69R, respectively.

  Each of the rotary masses 66 and 66 is made of a material having a relatively large specific gravity, for example, iron, and is formed in a donut plate shape. The friction material 71 is concentrically fitted in the central hole of the rotary mass 66. The friction coefficient of the friction material 71 is set so that the rotation mass 66 slides with respect to the friction material 71 when the rotation torque of the rotation mass 66 becomes a predetermined value or more. Thereby, the rotation mass 66 rotates together with the screw shaft 65 until the rotation torque reaches a predetermined value.

  Further, the screw shaft 65 is provided with a flange for restricting the movement of the rotary masses 66, 66 in the left-right direction (axial direction). As described above, the left and right connecting portions 69L and 69R are sandwiched between the left and right rotating masses 66 and 66 that are provided on the screw shaft 65 so as not to move in the left and right direction, so that the screw shaft 65 is The connecting portions 69L and 69R are prevented from coming off.

  Moreover, the vibration suppression device according to the second embodiment includes a pair of left and right cables 73L and 73R, a first pulley 74L and 74R, and a second pulley 75L and 75R. 73L, 73R, the first pulleys 74L, 74R and the second pulleys 75L, 75R are respectively configured in the same manner as the left and right cables 6L, 6R, the first pulleys 7L, 7R and the second pulleys 8L, 8R of the first embodiment. ing.

  Specifically, the left cable 73L is partially accommodated in the second cylinder 62, one end of which is attached to the left end of the second piston 63, and extends leftward from the second piston 63. The cable guide hole in the left wall 62a of the second cylinder 62 is inserted through a seal. The other end of the left cable 73L is attached to the left connecting portion 69L.

  The left first pulley 74L is attached to the left wall 62a of the second cylinder 62, and the left second pulley 75L is attached to the left connecting portion 69L. The left cable 73L is wound in a state where the left cable 73L is folded back to the first and second pulleys 74L and 75L, and a predetermined tension is applied thereto.

  The right cable 73R is partially accommodated in the second cylinder 62, one end of which is attached to the right end of the second piston 63 and extends rightward from the second piston 63. The right wall 62b is inserted through the cable guide hole through a seal. The other end portion of the right cable 73R is attached to the right connecting portion 69R.

  The right first pulley 74R is attached to the right wall 62b of the second cylinder 62, and the right second pulley 75R is attached to the right connecting portion 69R. The right cable 73R is wound around the first and second pulleys 74R and 75R at an intermediate portion thereof, and a tension having the same magnitude as the tension of the left cable 73L is applied.

  Note that the second damper of the right vibration suppression device is configured in the same manner as the second damper 61 of the left vibration suppression device described above, and is different only in that it is arranged symmetrically. The detailed description is omitted.

  As described above, according to the second embodiment, the nut 64 is integrally attached to the second piston 63, and the rotatable screw shaft 65 is screwed into the nut 64 via the ball. . The screw shaft 65 is provided with rotating masses 66 and 66. With the above configuration, when the structure C vibrates, the screw shaft 65 rotates together with the rotary masses 66 and 66 as the second piston 63 moves relative to the second cylinder 62 together with the nut 64. By adding the inertia effect due to the rotational inertia of the rotary masses 66, 66, the vibration suppressing effect of the structure C can be further enhanced.

  Further, the friction material 71 is provided between the screw shaft 65 and the rotary mass 66. When the rotational torque of the rotary mass 66 reaches a predetermined value, the rotary mass 66 slides with respect to the screw shaft 65, and the screw shaft. Does not rotate with 65. Thereby, by limiting the inertial effect by the rotation mass 66, it is possible to prevent an overload state of the vibration suppressing device such as an excessive tensile load exceeding the elastic limit acting on the left and right cables 73L and 73R. In addition, the effect by 1st Embodiment can be acquired similarly.

  In the second embodiment, the rotating masses 66 and 66 are used. However, as in the second modification of the first embodiment, the screw shaft 65 is provided with a viscoelastic rubber or an elastic rubber. You may provide a 2nd rotation mass via a spring. In this case, by setting the specifications of the various elements as described in the second modification, the first additional vibration system composed of the hydraulic oil HF and the rotating mass 66, and the second composed of the second rotating mass and the like. The combined natural frequency with the additional vibration system can be multiple-tuned to the primary natural frequency of the structure C, and hence the vibration due to the primary mode of the structure C can be further appropriately suppressed. .

  Further, in the second embodiment, the screw shaft 65 is provided so as not to move from the left and right connecting portions 69L and 69R so as to be immovable in the left-right direction (axial direction) with respect to the foundation beam F. It may be provided so as to be rotatable with respect to the second cylinder 62 and immovable in the left-right direction (axial direction) and to be movable with respect to the foundation beam F in the left-right direction. Thereby, the movement of the second piston 63 relative to the second cylinder 62 can be converted into a rotational motion and transmitted to the rotary mass 66.

  The present invention is not limited to the first and second embodiments and modifications described below (hereinafter collectively referred to as “embodiments”), and can be implemented in various modes. For example, in the embodiment, the connection position of the first piston 22 with respect to the transmission member 4 is set on the extension axis of the additional column 4a, that is, the other end of the transmission member 4 on the opposite side to the horizontal column P. However, it may be set at another appropriate portion on the other end side. In the embodiment, the first cylinder 21 is connected to the foundation beam F on which the structure C is erected. However, the first cylinder 21 is provided below the structure C or a beam provided below the structure C. It may be connected to an underground structure. Furthermore, in the embodiment, the first cylinder 21 is connected to the foundation beam F, and the first piston 22 is connected to the transmission member 4, but conversely, the first cylinder 21 is connected to the transmission member 4, and the first cylinder 21 is connected to the transmission member 4. One piston 22 may be connected to the foundation beam F.

  In the embodiment, the first damper 2 and the transmission member 4 are provided inside the structure C, but may be provided outside the structure C as shown in FIG. Furthermore, in the embodiment, the joining position of the additional column 4a to the beam B, that is, the length in the left-right direction of the transmission member 4 is set to a length of L / 4 from the axis of the column P on which the transmission member 4 is provided. However, the present invention is not limited to this, and other suitable lengths can be adopted. In the embodiment, the transmission member 4 is provided from the upper end portion to the lower portion of the column P, but may be provided on the upper portion of the column P as shown in FIG. In that case, the first cylinder or the first piston of the first damper 2 is connected to the foundation beam F through a wall portion W having higher rigidity than the column P. This wall part W is comprised, for example with the reinforced concrete. Further, the transmission member may not be provided up to the upper end portion (uppermost floor) of the structure C, and may be provided up to a floor slightly below the uppermost floor.

  Furthermore, in the embodiment, a part of the column P and the beam B is also used as the transmission member 4, but the transmission member may be configured without using at least one of them. Further, in the embodiment, the transmission member 4 is configured by a combination of the additional column 4a and the brace material 4b. However, the transmission member 4 may be configured by a reinforced concrete wall having higher rigidity than the column P. Furthermore, in the embodiment, the transmission member 4 is provided on the column P and the beam B constituting the rigid frame structure of the structure C. However, a space such as a blow-through portion of the structure (building) or an elevator installation space is defined. You may provide in the wall part and pillar which do.

  In the embodiment, the second cylinders 31 and 62 are connected to the joints between the left and right pillars PL and PR and the beam B via the second support member 5, but the second support member 5 is omitted. In addition, the second cylinder may be directly connected to the beam. Furthermore, in the embodiment, the second cylinders 31 and 62 are connected to the joint portions of the left and right columns PL and PR and the beam B, and the second pistons 32 and 63 are connected to the foundation beam F. Conversely, the second piston may be connected to the joint between the left and right columns and the beam, and the second cylinder may be connected to the foundation beam. In this case, the second cylinder may be connected to the joint between the left and right columns and the foundation beam via the second support member provided in an inverted V shape, and may be disposed near the beam. The second support member may be omitted, and the second cylinder may be directly connected to the foundation beam. In any of these cases, the second pulley is attached to the joint between the left and right columns and the beam.

  In the embodiment, the second cylinder connection object in the present invention is a beam B that supports the second floor portion of the structure C, and the second piston connection object is a foundation beam F on which the structure C is erected. Of course, other appropriate parts of the structure may be adopted as the second cylinder connection object and the second piston connection object. Furthermore, in the embodiment, the second dampers 3 and 61 are installed between the base beam F and the beam B immediately above it to suppress the interlayer displacement between the two layers. Of course, the displacement may be suppressed. Further, in order to enhance the vibration suppressing effect by the vibration suppressing device, the rigidity of the connecting portion of the structure C to which the second dampers 3 and 61 are connected may be set to be lower than the rigidity of the other portions. (Soft first story).

  In the embodiment, the second pistons 32 and 63 are connected to the foundation beam F via the left and right cables 6L, 6R, 73L, and 73R. Instead, the second pistons 32 and 63 are provided integrally with the second piston. Alternatively, they may be connected via a piston rod. Furthermore, in the embodiment, the left and right cables 6L, 6R, 73L, and 73R are steel wires, but may be any one that exhibits rigidity by applying tension, and may be, for example, a strip-shaped steel plate. Further, the number of turns of the left and right cables 6L, 6R, 73L, 73R around the first and second pulleys 7L, 7R, 8L, 8R, 74L, 74R, 75L, 75R of the embodiment can be arbitrarily set. By setting, the amplification factor of the displacement of the structure C transmitted to the second dampers 3 and 61 can be freely set.

  Furthermore, in the embodiment, the first dampers 2 and 2 are connected to the right end and the left end of the lower end of the transmission member 4, respectively, and the second damper 3 is connected to the beam B extending in the left-right direction, thereby Although the lateral displacement due to the vibration of C is suppressed, the longitudinal displacement due to the vibration of the structure may be suppressed. In this case, the first damper is connected to the front end portion (rear end portion) of the lower end portion of the transmission member, and the second damper is connected to the beam extending in the front-rear direction, and the second cylinder of the second damper. Are provided so as to extend in the front-rear direction. In the embodiment, the first and second cylinders 21, 31, 62 and the first and second pistons 22, 32, 63 have a circular cross-sectional shape, but may have other appropriate shapes, for example, a square shape. Good. Thus, when the cross-sectional shape of the 2nd cylinder 62 and the 2nd piston 63 of 2nd Embodiment is set to square shape, the recessed part and rails 62f and 62f which were mentioned above are omissible. Further, in the embodiment, the working fluid in the present invention is the working oil HF, but may be other suitable fluid having viscosity.

  In the embodiment, one vibration suppression device 1L (1R) is provided for one column P, but two vibration suppression devices may be provided. In this case, one transmission member and the first damper of the two vibration suppression devices are provided on one side in the horizontal direction of the column, and the other transmission member and the first damper of the two vibration suppression devices are in the horizontal direction of the column. On the other side of the direction. Further, in the embodiment, the pair of left and right vibration suppression devices 1L and 1R are provided, but either one of them may be omitted. The embodiment is an example in which the vibration suppression device according to the present invention is applied to a high-rise structure C. However, the present invention is not limited to this, and can be applied to other appropriate structures such as a steel tower. . In addition, it goes without saying that variations relating to the above embodiments may be applied in combination as appropriate. In addition, it is possible to appropriately change the detailed configuration within the scope of the gist of the present invention.

C structure P pillar PL left pillar PR right pillar B beam (one of the second and third parts, second cylinder connection target, lower part of the structure)
F foundation beam (support body, first part, second and third part, second piston connection target)
1L Vibration suppression device 1R Vibration suppression device 4 Transmission member 5 Support member (elastic element)
21 1st cylinder 21d 1st oil chamber (1st fluid chamber)
21e Second oil chamber (second fluid chamber)
22 1st piston HF hydraulic oil (working fluid)
31 Second cylinder 31d Third oil chamber (third fluid chamber)
31e Fourth oil chamber (fourth fluid chamber)
32 2nd piston 6L Left cable (pair of cables, elastic element)
6R Right cable (pair of cables, elastic element)
7L 1st pulley 7R 1st pulley 8L 2nd pulley 8R 2nd pulley 10 1st communication path 11 2nd communication path 41 Gear pump (power conversion mechanism)
47 First rotating mass (rotating mass)
62 Second cylinder 62d Third oil chamber (third fluid chamber)
62e Fourth oil chamber (fourth fluid chamber)
63 Second piston 64 Nut 65 Screw shaft 66 Rotating mass 73L Left cable (pair of cables, elastic element)
73R Right cable (a pair of cables, elastic elements)
74L first pulley 74R first pulley 75L second pulley 75R second pulley

Claims (6)

A vibration suppressing device for a structure having a column extending in the vertical direction and erected on a support,
It has a higher rigidity than said post, extending vertically, Rutotomoni which have a length in the horizontal direction, have you at one end of the horizontal direction the overall vertical provided integrally on at least an upper portion of the pillar A transmission member,
It extends in the vertical direction and is connected to one of a predetermined portion on the other end side in the horizontal direction at the lower end portion of the transmission member and a predetermined first portion in the system composed of the support and the lower portion of the structure. And a first cylinder filled with a working fluid;
The first cylinder is slidably provided in the first cylinder, and the first cylinder is divided into a first fluid chamber and a second fluid chamber, and is connected to the other of the predetermined portion and the first portion of the transmission member. A first piston,
A first portion of the system extending in the horizontal direction and comprising the support and the lower part of the structure, and a predetermined third portion of the structure above the second portion; A second cylinder connected to a two-cylinder connection target and filled with a working fluid;
The second cylinder is slidably provided in the second cylinder, divides the second cylinder into a third fluid chamber and a fourth fluid chamber, and is connected to a second piston connection target that is the other of the second and third portions. A connected second piston,
When the structure vibrates in a primary mode vibration mode and the structure is displaced to one side in the horizontal direction with respect to the support, the transmission member and the first part move away from the first cylinder. And a force in the direction of moving the first piston toward the first fluid chamber acts on the first piston, and the second cylinder and the second piston from the second and third portions to the second cylinder and the second piston. A force in a direction to move the two pistons toward the third fluid chamber is applied,
A first communication passage communicating the first and third fluid chambers with each other;
A second communication passage communicating the second and fourth fluid chambers with each other;
A vibration suppressing device for a structure, further comprising:   2. The vibration suppressing device for a structure according to claim 1, wherein the first and second portions are the support and the third portion is a lower portion of the structure. 3.   At least one of the second cylinder and the second piston is connected to at least one of the second cylinder connection object and the second piston connection object corresponding to the at least one through an elastic element. The vibration suppressing device for a structure according to claim 1 or 2. The second piston is connected to the second piston connection object via the elastic element,
The elastic element is composed of a pair of cables extending in opposite directions in the horizontal direction with the second piston in between,
A pair of first pulleys provided on the second cylinder and disposed on opposite sides in the horizontal direction with the second piston in between;
A pair of second pulleys connected to the second piston connection object and disposed on opposite sides in the horizontal direction with the second piston interposed therebetween,
4. The vibration suppression device for a structure according to claim 3, wherein an intermediate portion of each of the pair of cables is wound around the first and second pulleys. A rotatable mass,
A power conversion mechanism that is provided in at least one of the first and second communication paths, converts the flow of the working fluid in the at least one communication path into a rotational motion, and transmits the rotational motion to the rotary mass. The vibration suppression device for a structure according to any one of claims 1 to 4, wherein the device is a vibration suppression device. A nut integrally attached to the second piston;
A screw shaft that is threadably engaged with the nut via a ball, and that is rotatable with respect to the nut;
The vibration suppression device for a structure according to any one of claims 1 to 4, further comprising a rotary mass provided on the screw shaft.

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