JP6912882B2 - Laminated rubber seismic isolation device or viscous mass damper with spring - Google Patents

Description

The present invention relates to a laminated rubber seismic isolation device or a spring-loaded viscous mass damper. In particular, it relates to a laminated rubber seismic isolation device or a spring-loaded viscous mass damper that can handle small to large earthquakes.

Seismic isolation devices are used to suppress shaking caused by earthquakes.
For example, the seismic isolation device is a laminated rubber seismic isolation device or a spring-loaded viscous mass damper.
For example, a seismic isolation device is installed between the superstructure and the foundation or inside the superstructure.
For example, the superstructure is a building.
The laminated rubber seismic isolation device is composed of an upper flange, a lower flange, and a laminated rubber member.
The laminated rubber member is a member in which a plurality of metal plate-shaped members and a plurality of elastic plate-shaped members are alternately laminated in the vertical direction. The metal plate-shaped member and the plurality of elastic plate-shaped members may be adhered to each other.
The upper flange is a member arranged on the upper part of the laminated rubber member.
The lower flange is a member arranged below the laminated rubber member.
The lower flange is fixed to the foundation.
The upper flange is fixed to the underside of the building.
A viscous mass damper with a spring is a direct connection between a viscous mass damper and an elastic member.
The viscous mass damper rotatably supports a linear motion shaft provided with a male screw whose screw feed direction is directed along the displacement direction of the linear displacement, a rotating body provided with a female screw that fits the male screw, and the rotating body. The frame is composed of a viscous fluid sealed in a gap between the frame, the inner surface of the frame, and the rotating body.
In the elastic member, a pair of flanges, a plurality of metal plate members which are a plurality of metal plate-shaped members, and a plurality of elastic plate members which are a plurality of elastic plate-shaped members are alternately laminated in the specific direction. It is composed of laminated rubber members.
Here, the specific direction is a direction that intersects the direction of linear displacement.

When an earthquake occurs, the laminated rubber member is sheared and displaced, and a shearing force is generated between a plurality of metal plate-shaped members and a plurality of elastic plate-shaped members.
As a result, as the laminated rubber member is sheared and displaced, a reaction force is generated in a direction orthogonal to the laminating direction according to the degree of elastic deformation, and the seismic isolation function is exhibited.

When the earthquake ends, the posture of the laminated rubber member returns to its original posture.

Therefore, there has been a demand for a laminated rubber seismic isolation device or a spring-loaded viscous mass damper that exhibits a seismic isolation effect in response to a wide range of frequencies of seismic motion, as compared with a conventional laminated rubber seismic isolation device or a spring-loaded viscous mass damper. ..
In addition, compared to conventional laminated rubber seismic isolation devices or viscous mass dampers with springs, seismic isolation effects are exhibited in response to a wide range of seismic motions of various sizes and seismic motions, and power generation using building vibration is used. There has been a demand for an effective laminated rubber seismic isolation device or a viscous mass damper with a spring.

The present invention has been devised in view of the above-mentioned problems, and will provide a laminated rubber seismic isolation device or a spring-loaded viscous mass damper that exhibits a seismic isolation effect in response to a wide range of frequencies of seismic motion with a simple structure. And.

In order to achieve the above object, the laminated rubber seismic isolation device provided on the foundation according to the present invention and supporting the superstructure is provided with a pair of upper and lower flanges, an upper flange and a lower flange, and a plurality of metal plate-shaped members. A plurality of metal plate members, a plurality of elastic plate members which are plate-shaped members made of a plurality of elastic bodies, and a piezoelectric element member which has a plurality of piezoelectric elements and has a plate-like contour are alternately <alternately in the vertical direction. > The laminated rubber member to be laminated and an electric circuit electrically connected between the pair of terminals of the piezoelectric element are provided, the upper flange is arranged on the upper part of the laminated rubber member, and the lower flange is provided. It is arranged below the laminated rubber member, and when a horizontal shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, a potential difference is generated between the pair of terminals of the piezoelectric element. did.

According to the configuration of the present invention, the upper flange and the lower flange are a pair of upper and lower flanges. The laminated rubber member has a plurality of metal plate members which are a plurality of metal plate-shaped members, a plurality of elastic plate members which are a plurality of elastic plate-shaped members, and a plurality of piezoelectric elements, and has a plate-like contour. The piezoelectric element member, which is a member to be held, is laminated in the vertical direction. The electric circuit is electrically connected between the pair of terminals of the piezoelectric element. The upper flange is arranged on the upper part of the laminated rubber member. The lower flange is arranged below the laminated rubber member. When a horizontal shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, a potential difference is generated between the pair of terminals of the piezoelectric element.
As a result, when the superstructure is shaken by wind or earthquake, horizontal shear deformation occurs in the plurality of elastic plate members and the piezoelectric element members electrically connected to the electric circuit, which affects the shaking of the superstructure. Can be given.

The laminated rubber seismic isolation device according to the embodiment of the present invention will be described below. The present invention includes any of the embodiments described below, or a combination of two or more of them.

Further, in the laminated rubber seismic isolation device according to the embodiment of the present invention, a plurality of piezoelectric elements are arranged along the horizontal direction inside the plate-shaped contour.
According to the configuration of the embodiment according to the present invention, a plurality of piezoelectric elements are aligned along the horizontal direction inside the plate-shaped contour.
As a result, a large number of a plurality of piezoelectric elements can be arranged.

Further, in the laminated rubber seismic isolation device according to the embodiment of the present invention, the piezoelectric element member has a pair of upper and lower plate-shaped partition plates and a plurality of the piezoelectric elements, and the plurality of the piezoelectric elements are a pair of the above. It is sandwiched between partition plates and arranged horizontally.
According to the configuration of the embodiment according to the present invention, the piezoelectric element member has a pair of upper and lower plate-shaped partition plates and a plurality of the piezoelectric elements. The plurality of piezoelectric elements are sandwiched between a pair of upper and lower partition plates and arranged in the horizontal direction.
As a result, the electrical connection of the electric circuit becomes easy.

Further, in the laminated rubber seismic isolation device according to the embodiment of the present invention, when a horizontal shear deformation occurs between the upper surface and the lower surface of the plate-like contour of the multiple piezoelectric element members, the plurality of piezoelectric elements are subjected to shear strain. When the shear strain occurs in a plurality of piezoelectric elements, a potential difference is generated between the pair of terminals.
According to the configuration of the embodiment according to the present invention, when shear deformation in the horizontal direction occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, shear strain is generated in the plurality of piezoelectric elements. When the shear strain occurs in a plurality of piezoelectric elements, a potential difference is generated between the pair of terminals.
As a result, the shear distortion of the plurality of piezoelectric elements electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member.

Further, in the laminated rubber seismic isolation device according to the embodiment of the present invention, when a shear deformation in the horizontal direction occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, expansion and contraction strain occurs in the plurality of piezoelectric elements. ,
When the expansion and contraction strain occurs in a plurality of piezoelectric elements, a potential difference occurs between the pair of terminals.
According to the configuration of the embodiment according to the present invention, when shear deformation in the horizontal direction occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, expansion and contraction strain occurs in the plurality of piezoelectric elements. When the expansion and contraction strain occurs in a plurality of piezoelectric elements, a potential difference occurs between the pair of terminals.
As a result, the expansion and contraction distortion of the plurality of piezoelectric elements electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member.

Further, in the laminated rubber seismic isolation device according to the embodiment of the present invention, when a horizontal shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, the plurality of piezoelectric elements are distorted due to bending. When the plurality of piezoelectric elements are distorted due to the bending, a potential difference is generated between the pair of terminals.
According to the configuration of the embodiment according to the present invention, when shear deformation in the horizontal direction occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, distortion due to bending occurs in the plurality of piezoelectric elements. When distortion occurs in the plurality of piezoelectric elements due to the bending, a potential difference occurs between the pair of terminals.
As a result, distortion due to bending of the plurality of piezoelectric elements electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member.

Further, the laminated rubber seismic isolation device according to the embodiment of the present invention changes the impedance of the electric circuit in response to a change in the maximum amplitude value of the acceleration generated on the foundation when it is determined that an earthquake has occurred.
According to the configuration of the embodiment according to the present invention, the impedance of the electric circuit is changed in response to a change in the maximum amplitude value of the acceleration that occurs in the foundation when it is determined that an earthquake has occurred.
As a result, the influence of the distortion of the plurality of piezoelectric elements electrically connected to the electric circuit on the shear deformation of the piezoelectric element member can be changed according to the degree of the earthquake.

Further, the laminated rubber seismic isolation device according to the embodiment of the present invention has a capacitor in which the electric circuit is electrically connected between a pair of terminals of the plurality of piezoelectric elements, and when it is determined that an earthquake has occurred. The capacitance of the capacitor in the electrical circuit is changed in response to a change in the maximum amplitude value of the acceleration that occurs in the foundation.
According to the configuration of the embodiment according to the present invention, the electric circuit has a capacitor electrically connected between a pair of terminals of the plurality of piezoelectric elements. When it is determined that an earthquake has occurred, the capacitance of the capacitor in the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs in the foundation.
As a result, the influence of the distortion of the plurality of piezoelectric elements electrically connected to the electric circuit on the shear deformation of the piezoelectric element member can be changed according to the degree of the earthquake.

Further, in the laminated rubber seismic isolation device according to the embodiment of the present invention, the state of the electric circuit is changed by the potential difference generated between the pair of terminals and the ON state in which the current flows by the potential difference generated between the pair of terminals. It can be selectively set to an OFF state that does not flow, and when it is determined that an earthquake has occurred, the state of the electric circuit is changed to the ON state, and then the state is changed from the ON state to the OFF state while the earthquake continues.
According to the configuration of the embodiment according to the present invention, the state of the electric circuit can be changed to an ON state in which a current can be passed by a potential difference generated in a pair of the terminals and an OFF state in which a current cannot be passed by a potential difference generated between the pair of the terminals. Can be selectively set to. When it is determined that an earthquake has occurred, the state of the electric circuit is changed to the ON state, and then the state is changed from the ON state to the OFF state while the earthquake is continuing.
As a result, the influence of the distortion of the plurality of piezoelectric elements electrically connected to the electric circuit on the shear deformation of the piezoelectric element member can be changed according to the transition of the state after the occurrence of the earthquake.

In order to achieve the above object, a spring-loaded viscous mass damper provided on the target structure supported by the foundation according to the present invention and generating a reaction force in response to the linear motion displacement is installed along the displacement direction of the linear motion displacement. A linear motion shaft provided with a male screw pointing in the screw feed direction, a rotating body provided with a female screw that fits the male screw, a frame that rotatably supports the rotating body, and a gap between the inner surface of the frame and the rotating body. A viscous mass damper having a viscous fluid enclosed in the above, an elastic member that generates an elastic reaction force in response to the linear motion displacement, and an electric circuit, and a specific direction is perpendicular to the linear motion displacement. The viscous damper and the elastic member are connected in series, and the elastic member is a pair of flanges, a plurality of metal plate members which are a plurality of metal plate members, and a plurality of elastic plate members. It has a laminated rubber member in which a plurality of elastic plate members and a piezoelectric element member having a plurality of piezoelectric elements and having a plate-like contour are laminated in the specific direction, and one of a pair. The flange is fixed to one of the plurality of metal members, the other one of the pair of flanges is fixed to the other one of the plurality of metal members, and the plate-like contour of the piezoelectric element member is fixed. When shear deformation occurs between the upper surface and the lower surface along the linear motion direction, a potential difference is generated between the pair of terminals of the piezoelectric element, and the electric circuit is electrically connected between the pair of terminals of the piezoelectric element. It was decided.

According to the above-described configuration of the present invention, the viscous mass damper includes a linear motion shaft provided with a male screw whose screw feed direction is directed along the displacement direction of the linear displacement, a rotating body provided with a female screw that fits the male screw, and the above. It has a frame that rotatably supports the rotating body, and a viscous fluid sealed in a gap between the inner surface of the frame and the rotating body. The elastic member generates an elastic reaction force in response to the linear displacement. The specific direction is the direction orthogonal to the linear displacement. The viscous damper and the elastic member are connected in series. The laminated rubber member has a plurality of metal plate members which are a plurality of metal plate-shaped members, a plurality of elastic plate members which are a plurality of elastic plate-shaped members, and a plurality of piezoelectric elements, and has a plate-like contour. The piezoelectric element member, which is a member to be held, is laminated in the specific direction. One of the pair of flanges is fixed to one of the plurality of metal members. The other one flange of the pair is fixed to the other one metal member of the plurality. When shear deformation occurs along the linear motion direction between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, a potential difference is generated between the pair of terminals of the piezoelectric element. The electric circuit is electrically connected between the pair of terminals of the piezoelectric element.
As a result, when the superstructure is shaken by wind or earthquake, horizontal shear deformation occurs in the plurality of elastic plate members and the piezoelectric element members electrically connected to the electric circuit, which affects the shaking of the superstructure. Can be given.

The spring-loaded viscous mass damper according to the embodiment of the present invention will be described below. The present invention includes any of the embodiments described below, or a combination of two or more of them.

Further, in the viscous mass damper with a spring according to the embodiment of the present invention, a plurality of piezoelectric elements are arranged along a plane orthogonal to a specific direction inside the plate-shaped contour.
According to the configuration of the embodiment according to the present invention, a plurality of piezoelectric elements are arranged inside the plate-shaped contour along a plane orthogonal to a specific direction.
As a result, a large number of a plurality of piezoelectric elements can be arranged.

Further, in the spring-loaded viscous mass damper according to the embodiment of the present invention, the piezoelectric element member has a pair of plate-shaped partition plates and a plurality of the piezoelectric elements, and the plurality of the piezoelectric elements are a pair of the first partitions. It is sandwiched between plates and arranged along a plane orthogonal to a specific direction.
According to the configuration of the embodiment according to the present invention, the piezoelectric element member has a pair of plate-shaped partition plates and a plurality of the piezoelectric elements. The plurality of piezoelectric elements are sandwiched between the pair of partition plates and arranged along a plane orthogonal to a specific direction.
As a result, the electrical connection of the electric circuit becomes easy.

Further, the viscous mass damper with a spring according to the embodiment of the present invention shears a plurality of piezoelectric elements when a shear deformation in the direction of linear displacement occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member. When strain occurs and the shear strain occurs in a plurality of piezoelectric elements, a potential difference is generated between the pair of terminals.
According to the configuration of the embodiment according to the present invention, when shear deformation in the direction of linear displacement occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, shear distortion occurs in the plurality of piezoelectric elements.
When the shear strain occurs in a plurality of piezoelectric elements, a potential difference is generated between the pair of terminals.
As a result, the shear distortion of the plurality of piezoelectric elements electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member.

Further, the viscous mass damper with a spring according to the embodiment of the present invention expands and contracts to a plurality of piezoelectric elements when a shear deformation in the direction of linear displacement occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member. When distortion occurs and the expansion and contraction distortion occurs in the plurality of piezoelectric elements, a potential difference occurs between the pair of terminals.
According to the configuration of the embodiment according to the present invention, when shear deformation in the direction of linear displacement occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, expansion and contraction strain occurs in the plurality of piezoelectric elements. When the expansion and contraction strain occurs in a plurality of piezoelectric elements, a potential difference occurs between the pair of terminals.
As a result, the expansion and contraction distortion of the plurality of piezoelectric elements electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member.

Further, the viscous mass damper with a spring according to the embodiment of the present invention bends into a plurality of piezoelectric elements when a shear deformation in the direction of linear displacement occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member. When the distortion due to the bending occurs in the plurality of piezoelectric elements and the distortion due to the bending occurs, a potential difference occurs between the pair of terminals.
According to the configuration of the embodiment according to the present invention, when shear deformation in the direction of linear displacement occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, distortion due to bending occurs in the plurality of piezoelectric elements. When distortion occurs in the plurality of piezoelectric elements due to the bending, a potential difference occurs between the pair of terminals.
As a result, distortion due to bending of the plurality of piezoelectric elements electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member.

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Further, the spring-loaded viscous mass damper according to the embodiment of the present invention changes the impedance of the electric circuit in response to a change in the maximum amplitude value of the acceleration generated in the foundation when it is determined that an earthquake has occurred.
According to the configuration of the embodiment according to the present invention, the impedance of the electric circuit is changed in response to a change in the maximum amplitude value of the acceleration that occurs in the foundation when it is determined that an earthquake has occurred.
As a result, the influence of the distortion of the plurality of piezoelectric elements electrically connected to the electric circuit on the shear deformation of the piezoelectric element member can be changed according to the degree of the earthquake.

Further, the spring-loaded viscous mass damper according to the embodiment of the present invention has a capacitor in which the electric circuit is electrically connected between a pair of terminals of the plurality of piezoelectric elements, and when it is determined that an earthquake has occurred. The capacitance of the capacitor in the electrical circuit is changed in response to a change in the maximum amplitude value of the acceleration that occurs in the foundation.
According to the configuration of the embodiment according to the present invention, the electric circuit has a capacitor electrically connected between a pair of terminals of the plurality of piezoelectric elements. When it is determined that an earthquake has occurred, the capacitance of the capacitor in the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs in the foundation.
As a result, the influence of the distortion of the plurality of piezoelectric elements electrically connected to the electric circuit on the shear deformation of the piezoelectric element member can be changed according to the degree of the earthquake.

Further, the viscous mass damper with a spring according to the embodiment of the present invention applies a current to the state of the electric circuit by a potential difference generated between the pair of terminals and an ON state in which a current flows by a potential difference generated between the pair of terminals. It can be selectively set to an OFF state that does not flow, and when it is determined that an earthquake has occurred, the state of the electric circuit is changed to the ON state, and then the state is changed from the ON state to the OFF state while the earthquake is continuing.
According to the configuration of the embodiment according to the present invention, the state of the electric circuit can be changed to an ON state in which a current can be passed by a potential difference generated in a pair of the terminals and an OFF state in which a current cannot be passed by a potential difference generated between the pair of the terminals. Can be selectively set to. When it is determined that an earthquake has occurred, the state of the electric circuit is changed to the ON state, and then the state is changed from the ON state to the OFF state while the earthquake is continuing.
As a result, the influence of the distortion of the plurality of piezoelectric elements electrically connected to the electric circuit on the shear deformation of the piezoelectric element member can be changed according to the transition of the state after the occurrence of the earthquake.

As described above, the laminated rubber seismic isolation device according to the present invention has the following effects depending on its configuration.
A plurality of metal plate members, a plurality of elastic plate members, and a piezoelectric element member are laminated in the vertical direction in a laminated rubber member arranged between a pair of upper and lower flanges, and the upper surface and the lower surface of the plate-like contour of the piezoelectric element member are formed. When a horizontal shear deformation occurs between the two, a potential difference is generated between the pair of terminals of the piezoelectric element, and the electric circuit is electrically connected between the pair of terminals of the piezoelectric element. When shaking occurs in the superstructure due to an earthquake, horizontal shear deformation occurs in the plurality of elastic plate members and the piezoelectric element members that are electrically connected to the electric circuit, which can affect the shaking of the superstructure. ..
Further, since the plurality of piezoelectric elements are arranged along the horizontal plane inside the plate-shaped contour, a large number of the plurality of piezoelectric elements can be arranged.
Further, since the plurality of piezoelectric elements are sandwiched between the pair of upper and lower plate-shaped partition plates and arranged in the horizontal direction, the electrical connection of the electric circuit becomes easy.
Further, when horizontal shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, shear distortion occurs in the plurality of piezoelectric elements and a potential difference is generated between the pair of terminals. The shear strain of the plurality of piezoelectric elements electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member.
Further, when horizontal shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, expansion and contraction distortion occurs in the plurality of piezoelectric elements, and a potential difference is generated between the pair of terminals. The expansion and contraction strain of the plurality of piezoelectric elements electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member.
Further, when horizontal shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, distortion due to bending occurs in the plurality of piezoelectric elements, and a potential difference is generated between the pair of terminals. , Distortion due to bending of a plurality of piezoelectric elements electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member.
In addition, since the impedance of the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation when it is determined that an earthquake has occurred, a plurality of piezoelectric elements electrically connected to the electric circuit are changed. The effect of the strain on the shear deformation of the piezoelectric element member can be changed according to the degree of the earthquake.
In addition, since the capacitance of the capacitor of the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation when it is determined that an earthquake has occurred, it is electrically connected to the electric circuit. The effect of the strain of the plurality of piezoelectric elements on the shear deformation of the piezoelectric element member can be changed according to the degree of the earthquake.
Further, when it is determined that an earthquake has occurred, the state of the electric circuit is changed to the ON state, and then the state of the electric circuit is changed from the ON state to the OFF state while the earthquake is continuing. The influence of the strain of the plurality of connected piezoelectric elements on the shear deformation of the piezoelectric element member can be changed according to the transition of the state after the occurrence of the earthquake.

As described above, the spring-loaded viscous mass damper according to the present invention has the following effects depending on its configuration.
A viscous mass damper composed of a linear motion shaft, a rotating body that rotates by the linear motion shaft, a frame that rotatably supports the rotating body, and a viscous fluid enclosed in the frame, and an elastic member that generates an elastic reaction force are connected in series. A laminated rubber member in which the elastic member is arranged between a pair of upper and lower flanges is laminated with a plurality of metal plate members, a plurality of elastic plate members, and a piezoelectric element member in a specific direction, and a plate-like contour of the piezoelectric element member is provided. When shear deformation occurs between the upper surface and the lower surface in the direction of linear motion displacement, a potential difference is generated between the pair of terminals of the piezoelectric element, and an electric circuit is electrically connected between the pair of terminals of the piezoelectric element. Therefore, when the superstructure part is shaken by wind or earthquake, horizontal shear deformation occurs in the multiple elastic plate members and the piezoelectric element members that are electrically connected to the electric circuit, and the superstructure structure. It can affect the shaking.
Further, since the plurality of piezoelectric elements are arranged along the plane orthogonal to the specific direction inside the plate-shaped contour, a large number of the plurality of piezoelectric elements can be arranged.
Further, since the plurality of piezoelectric elements are sandwiched between the pair of plate-shaped partition plates and arranged in a specific direction, the electrical connection of the electric circuit becomes easy.
Further, when shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member in the direction of linear motion displacement, shear distortion occurs in the plurality of piezoelectric elements and a potential difference is generated between the pair of terminals. Therefore, the shear distortion of the plurality of piezoelectric elements electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member.
Further, when shear deformation in the direction of linear motion displacement occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, expansion and contraction distortion occurs in the plurality of piezoelectric elements and a potential difference is generated between the pair of terminals. Therefore, the expansion and contraction strain of the plurality of piezoelectric elements electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member.
Further, when shear deformation in the direction of linear motion displacement occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member, distortion due to bending occurs in the plurality of piezoelectric elements, and a potential difference is generated between the pair of terminals. Therefore, the strain due to bending of the plurality of piezoelectric elements electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member.
In addition, since the impedance of the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation when it is determined that an earthquake has occurred, a plurality of piezoelectric elements electrically connected to the electric circuit are changed. The effect of the strain on the shear deformation of the piezoelectric element member can be changed according to the degree of the earthquake.
In addition, since the limiting capacitance of the capacitor of the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation when it is determined that an earthquake has occurred, a plurality of capacitors electrically connected to the electric circuit are connected. The effect of the strain of the piezoelectric element on the shear deformation of the piezoelectric element member can be changed according to the degree of the earthquake.
Further, when it is determined that an earthquake has occurred, the state of the electric circuit is changed to the ON state, and then the state of the electric circuit is changed from the ON state to the OFF state while the earthquake is continuing. The influence of the strain of the plurality of connected piezoelectric elements on the shear deformation of the piezoelectric element member can be changed according to the transition of the state after the occurrence of the earthquake.
As a result, it is possible to provide a laminated rubber seismic isolation device or a spring-loaded viscous mass damper that exhibits a seismic isolation effect in response to a wide range of frequencies of seismic motion with a simple structure.

It is a conceptual diagram of the seismic isolation device which concerns on embodiment of this invention. It is a side sectional view of the laminated rubber seismic isolation device which concerns on embodiment of this invention. It is sectional drawing of the laminated rubber seismic isolation device which concerns on embodiment of this invention. It is a conceptual diagram of the piezoelectric element member 1 which concerns on embodiment of this invention. It is a conceptual diagram of the piezoelectric element member 2 which concerns on embodiment of this invention. It is a conceptual diagram of the piezoelectric element member 3 which concerns on embodiment of this invention. It is a conceptual diagram of the viscous mass damper with a spring which concerns on embodiment of this invention. It is a conceptual diagram of the elastic member which concerns on embodiment of this invention. It is a mass model figure of the viscous mass damper with a spring which concerns on embodiment of this invention.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

The seismic isolation device according to the embodiment of the present invention is a laminated rubber seismic isolation device 100 or a spring-loaded viscous mass damper (200, 300).

FIG. 1 shows that a laminated rubber seismic isolation device 100 is provided between an object and a foundation in order to seismically isolate and suppress vibration of the target structure.

FIG. 1 shows that a spring-loaded viscous mass damper is provided between the layers of the target structure in order to dampen the target structure.
A spring-loaded viscous mass damper fixes one connecting member to the lower hierarchy and the other connecting member to the upper hierarchy.
For example, a spring-loaded viscous mass damper is provided with the direction of linear displacement along the horizontal direction.
For example, a spring-loaded viscous mass damper is provided with the direction of linear displacement along an oblique direction.
For example, a spring-loaded viscous mass damper is provided with the direction of linear displacement along the vertical direction.
By using the viscous mass damper with a spring according to the embodiment of the present invention, it is possible to optimize the natural frequency, damping coefficient, etc., and to exhibit seismic isolation performance and vibration damping performance.

FIG. 1 shows that a spring-loaded viscous mass damper is provided on the TMD provided on the upper part of the target structure in order to suppress the vibration of the target structure.
The TMD is supported by the support structure 40, and other dampers (not shown) are also provided.
FIG. 1 shows that a spring-loaded viscous mass damper is provided between an adjacent target structure and the target structure in order to suppress vibration.

First, the laminated rubber seismic isolation device 100 according to the embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a side sectional view of the laminated rubber seismic isolation device 100 according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of the laminated rubber seismic isolation device 100 according to the embodiment of the present invention.

The laminated rubber seismic isolation device 100 according to the embodiment of the present invention is composed of a laminated rubber member 110 and a pair of flanges 120.
The laminated rubber seismic isolation device 100 according to the embodiment of the present invention may be composed of a laminated rubber member 110, a pair of flanges 120, and a control device 400.
The laminated rubber seismic isolation device 100 according to the embodiment of the present invention may be composed of a laminated rubber member 110, a pair of flanges 120, and an electric circuit 410.

The laminated rubber member 110 is composed of a plurality of metal plate members 111, a plurality of elastic plate members 112, and a piezoelectric element member 114.
The laminated rubber member 110 is composed of a plurality of metal plate members 111, a plurality of elastic plate members 112, and a plurality of piezoelectric element members 114.
The laminated rubber member 110 may be composed of a plurality of metal plate members 111, a plurality of elastic plate members 112, an outer peripheral covering material 113, and a piezoelectric element member 114.
The laminated rubber member 110 may be composed of a plurality of metal plate members 111, a plurality of elastic plate members 112, an outer peripheral covering material 113, and a plurality of piezoelectric element members 114.

The plurality of metal plate members 111 may be composed of the uppermost metal plate member 111a, the plurality of metal plate members 111, and the lowermost metal plate member 111b.
The metal plate member 111 is a metal plate-shaped member.
The metal plate member 111 may be a metal plate-shaped member having a circular outer circumference when viewed from above.
The uppermost metal plate member 111a is the uppermost metal plate member 111.
The lowest metal plate member 111b is the lowest metal plate member 111.

The elastic plate member 112 is a plate-shaped member made of an elastic body.
The elastic plate member 112 may be a plate-shaped member made of an elastic body having a substantially circular outer circumference when viewed from above.

The piezoelectric element member 114 is a member having a plurality of piezoelectric elements 114a and having a plate-like contour.
The piezoelectric element member 114 may be composed of a plurality of piezoelectric elements 114a and a pair of upper and lower partition plates 114b and 114c.
The upper and lower partition plates are composed of an upper partition plate 114b and a lower partition plate 114c.

Hereinafter, three types of the piezoelectric element member 114 according to the embodiment of the present invention will be described with reference to the drawings.

FIG. 4 is a conceptual diagram of the piezoelectric element member 1 according to the embodiment of the present invention.
The piezoelectric element member 114 is composed of a plurality of piezoelectric elements 114a.
A plurality of piezoelectric elements 114a are arranged along a horizontal plane inside a plate-shaped contour.
The piezoelectric element member 114 may be composed of a plurality of piezoelectric elements 114a, an upper partition plate 114b, and a lower partition plate 114c.
The plurality of piezoelectric elements 114a are sandwiched between the upper partition plate 114b and the lower partition plate 114c and arranged in the horizontal direction.
The upper partition plate 114b and the lower partition plate 114c may be supported so as to be relatively movable in the horizontal direction by a structure (not shown).
The upper surface of the upper partition plate 114b forms the upper surface of the plate-like contour of the piezoelectric element member 114.
The lower surface of the partition plate 114c forms the lower surface of the plate-like contour of the piezoelectric element member 114.
When a horizontal shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 114, shear distortion occurs in the plurality of piezoelectric elements 114a.
When shear strain occurs in the plurality of piezoelectric elements 114a, a potential difference is generated between the pair of terminals.
FIG. 3A shows a state in which shear deformation occurs in the X-axis direction between the upper surface and the lower surface of the plate-shaped contour of one piezoelectric element member 114.
FIG. 3B shows a state in which shear deformation occurs in the Y-axis direction between the upper surface and the lower surface of the plate-shaped contour of the other piezoelectric element member 114.
FIG. 4 shows how a plurality of piezoelectric elements 114a are subjected to shear strain when shear deformation occurs in the X-axis direction or the Y-axis direction between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 114.
FIG. 4 shows how shear strain occurs in the plurality of piezoelectric elements 114a when the line of sight is made horizontal.
Shear strain may be generated in the plurality of piezoelectric elements 114a when the line of sight is made vertical.
The piezoelectric element 114a is a piezoelectric element that causes a potential difference between a pair of terminals due to shear deformation.
In FIG. 1, a plurality of units are arranged in the horizontal direction.
The unit is a stack of a plurality of piezoelectric elements 114a in the vertical direction.
Piezoelectric element 114a When shear deformed in the horizontal direction, a potential difference is generated between the pair of terminals.

FIG. 5 is a conceptual diagram of the piezoelectric element member 2 according to the embodiment of the present invention.
The piezoelectric element member 114 is composed of a plurality of piezoelectric elements 114a.
A plurality of piezoelectric elements 114a are arranged along a horizontal plane inside a plate-shaped contour.
The piezoelectric element member 114 may be composed of a plurality of piezoelectric elements 114a, an upper partition plate 114b, and a lower partition plate 114c.
The plurality of piezoelectric elements 114a are sandwiched between the upper partition plate 114b and the lower partition plate 114c and arranged in the horizontal direction.
The upper partition plate 114b and the lower partition plate 114c may be supported so as to be relatively movable in the horizontal direction by a structure (not shown).
The upper surface of the upper partition plate 114b forms the upper surface of the plate-like contour of the piezoelectric element member 114.
The lower surface of the partition plate 114c forms the lower surface of the plate-like contour of the piezoelectric element member 114.
When a horizontal shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 114, expansion and contraction strain occurs in the plurality of piezoelectric elements 114a.
When the plurality of piezoelectric elements 114a are strained by expansion and contraction, a potential difference is generated between the pair of terminals.
FIG. 3A shows a state in which shear deformation occurs in the X-axis direction between the upper surface and the lower surface of the plate-shaped contour of one piezoelectric element member 114.
FIG. 3B shows a state in which shear deformation occurs in the Y-axis direction between the upper surface and the lower surface of the plate-shaped contour of the other piezoelectric element member 114.
FIG. 5 shows how the plurality of piezoelectric elements 114a are strained when shear deformation occurs in the X-axis direction or the Y-axis direction between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 114.
FIG. 5 shows how the plurality of piezoelectric elements 114a are subjected to expansion and contraction distortion in the horizontal direction when the line of sight is made horizontal.
The piezoelectric element 114a is a piezoelectric element that causes a potential difference between a pair of terminals due to expansion and contraction deformation.
In FIG. 1, a plurality of units are arranged in the horizontal direction.
The unit is a unit in which a plurality of piezoelectric elements 114a are laminated in the horizontal direction.
When the piezoelectric element 114a expands and contracts in the horizontal direction, a potential difference is generated between the pair of terminals.

FIG. 6 is a conceptual diagram of the piezoelectric element member 3 according to the embodiment of the present invention.
The piezoelectric element member 114 is composed of a plurality of piezoelectric elements 114a.
A plurality of piezoelectric elements 114a are arranged along a horizontal plane inside a plate-shaped contour.
The piezoelectric element member 114 may be composed of a plurality of piezoelectric elements 114a, an upper partition plate 114b, and a lower partition plate 114c.
The plurality of piezoelectric elements 114a are sandwiched between the upper partition plate 114b and the lower partition plate 114c and arranged in the horizontal direction.
The upper partition plate 114b and the lower partition plate 114c may be supported so as to be relatively movable in the horizontal direction by a structure (not shown).
The upper surface of the upper partition plate 114b forms the upper surface of the plate-like contour of the piezoelectric element member 114.
The lower surface of the partition plate 114c forms the lower surface of the plate-like contour of the piezoelectric element member 114.
When a horizontal shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 114, the plurality of piezoelectric elements 114a are distorted due to bending.
When the plurality of piezoelectric elements 114a are distorted due to bending, a potential difference is generated between the pair of terminals.
FIG. 3A shows a state in which shear deformation occurs in the X-axis direction between the upper surface and the lower surface of the plate-shaped contour of one piezoelectric element member 114.
FIG. 3B shows a state in which shear deformation occurs in the Y-axis direction between the upper surface and the lower surface of the plate-shaped contour of the other piezoelectric element member 114.
FIG. 6 shows how the plurality of piezoelectric elements 114a are distorted due to bending when shear deformation occurs in the X-axis direction or the Y-axis direction between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 114.
FIG. 6 shows how the plurality of piezoelectric elements 114a are distorted due to bending when the line of sight is made horizontal.
When the line of sight is made vertical, the plurality of piezoelectric elements 114a may be distorted due to bending.
The piezoelectric element 114a is a piezoelectric element that causes a potential difference between a pair of terminals due to distortion due to bending.
In FIG. 3, a plurality of units are arranged in the horizontal direction.
The unit is a unit in which a plurality of piezoelectric elements 114a are laminated in the horizontal direction.
When the piezoelectric element 114a is bent in the horizontal direction, a potential difference is generated between the pair of terminals.

A plurality of metal plate members 111, a plurality of elastic plate members 112, and a piezoelectric element member 114 are alternately laminated in the vertical direction.
A plurality of metal plate members 111, a plurality of elastic plate members 112, and a single or a plurality of piezoelectric element members 114 may be alternately laminated and adhered in the vertical direction.

The outer peripheral covering material 113 is a member that covers the outer periphery of a stack of a plurality of metal plate members 111, a plurality of elastic plate members 112, and a single or a plurality of piezoelectric element members 114.
The outer peripheral covering material 113 is made of an elastic body.

The pair of flanges 120 may be composed of an upper flange 120u and a lower flange 120d.

The upper flange 120u is a flange arranged on the upper portion of the laminated rubber member 110.
The upper flange 120u may be composed of a flange member 121 and a shearing key 122.
The flange member 121 forms an upwardly facing flange surface that abuts against the lower part of the superstructure.
The flange member 121 may be formed with bolt holes for fixing to the lower part of the superstructure.
The shearing key 122 is a mechanical element that transmits a shearing force between the flange member 121 and the laminated rubber member 10.
The shear key 122 may be a mechanical element that fits into the lower part of the flange member 121 and the upper part of the uppermost metal plate member 11a to transmit the shearing force.

The lower flange 120d is a flange arranged below the laminated rubber member 110.
The lower flange 120d may be composed of a flange member 121 and a shearing key 122.
The flange member 121 forms a downwardly facing flange surface that abuts on the top of the foundation.
The flange member 121 may be formed with bolt holes for fixing to the upper part of the foundation.
The shearing key 122 is a mechanical element that transmits a shearing force between the flange member 121 and the laminated rubber member 110.
The shear key 122 may be a mechanical element that fits into the lower part of the flange member 121 and the lower part of the lowermost metal plate member 111b to transmit the shearing force.

The control device 400 is a device that controls the piezoelectric element.
The control device 400 includes an electric circuit 410.
The electric circuit 410 is electrically connected between the pair of terminals of the piezoelectric element.
The electric circuit 410 may have a capacitor that is electrically connected between a pair of terminals of a plurality of piezoelectric elements.
The electric circuit 410 may have a capacitor capable of varying the capacitance electrically connected between a pair of terminals of a plurality of piezoelectric elements.
The control device 400 is an electric device including a CPU, a memory, an I / O, and a sensor.
The sensor can detect an earthquake.
The sensor can evaluate seismic waves.
Software for controlling the piezoelectric element is installed in the control device 400.
The software enables the control device 400 to realize a function of controlling the piezoelectric element.

The function of the control device 400 to control the piezoelectric element will be described below.
The impedance of the electric circuit 410 may be changed in response to a change in the maximum amplitude value of the acceleration that occurs on the foundation when it is determined that an earthquake has occurred.

When it is determined that an earthquake has occurred, the capacitance of the capacitor of the electric circuit 410 may be changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation.
When the capacitance of the capacitor is changed, the impedance of the electric circuit 410 changes.

The state of the electric circuit may be selectively set to an ON state in which a current can flow due to a potential difference generated between a pair of terminals and an OFF state in which a current cannot flow due to a potential difference generated between the pair of terminals.
When it is judged that an earthquake does not occur, the state of the electric circuit is set to the OFF state, and when it is judged that an earthquake has occurred, when the maximum amplitude value of the basic acceleration exceeds the preset setting, the state of the electric circuit May be set from the ON state to the OFF state when the earthquake stops after the is changed from the OFF state to the ON state. Here, the set value is the maximum amplitude value of the acceleration generated on the foundation when a relatively large earthquake occurs.

Next, the operation of the laminated rubber seismic isolation device 100 according to the embodiment of the present invention will be described with reference to the drawings.
When the target structure is shaken by wind or an earthquake, a horizontal reaction force acts on the laminated rubber seismic isolation device 100.
The reaction force due to vibration acts on the laminated rubber member.
As a result, shear deformation along the horizontal direction occurs in the elastic plate member and the piezoelectric element member.
When a shear displacement that repeats plus and minus along the direction of linear motion displacement occurs in the piezoelectric element member, plus and minus distortion occurs in the piezoelectric element.
When the piezoelectric element is distorted, an alternating potential difference occurs between the pair of terminals.
When the electric circuit is in the ON state, a current flows through the electric circuit corresponding to the impedance of the electric circuit, and vibration energy is converted into thermal energy by the resistance of the electric circuit.
The frequency characteristics of an electric circuit can be changed by changing the impedance of the electric circuit in response to a change in the maximum amplitude value of acceleration that occurs on the basis of the impedance of the electric circuit.
In addition, when it is determined that an earthquake has occurred, the vibration energy can be converted into heat energy at a desired timing by turning the state of the electric circuit on and then turning it from the ON state to the OFF state while the earthquake is continuing. ..
In addition, the current flowing through the electric circuit can be converted to direct current and stored in the secondary battery.

Next, the spring-loaded viscous mass damper according to the embodiment of the present invention will be described with reference to the drawings.
For convenience of explanation, a case where a viscous mass damper with a spring is attached to the target structure will be described as an example.

First, the spring-loaded viscous mass damper according to the embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a conceptual diagram of the spring-loaded viscous mass damper according to the embodiment of the present invention. FIG. 8 is a conceptual diagram of an elastic member according to an embodiment of the present invention. FIG. 9 is a mass model diagram of a viscous mass damper with a spring according to an embodiment of the present invention.

The spring-loaded viscous mass damper is a mechanical element that generates a reaction force in response to a linear displacement, and is a viscous mass damper 200 and an elastic member 300 connected in series.
The viscous mass damper 200 is a mechanical element that generates a reaction force in response to a linear motion displacement, and is composed of a linear motion shaft 210, a rotating body 220, a frame 230, and a viscous fluid 240.
For example, the spring-loaded viscous mass damper is connected to the target structure 30 using a connecting member 250.
The target structure 30 is a structure that is seismically isolated or vibration-damped by a viscous mass damper with a spring.
For seismic isolation, a spring-loaded viscous mass damper is installed on the foundation of the target structure 30.
For vibration damping, a spring-loaded viscous mass damper is installed between the main structural members of the structure.

The linear motion shaft 210 is a member provided with a male screw whose screw feed direction is directed along the displacement direction of the linear motion displacement.
For example, the linear motion shaft 210 is composed of a male screw member 211 and a longitudinal member 212.
FIG. 7 shows a male screw member 211 formed on the outer periphery of the male screw and a longitudinal member integrally connected to the male screw member 211.

The rotating body 220 is a member provided with a female screw that fits into the male screw.
The rotating body 220 is provided with a female screw that fits into the male screw, and includes a cylindrical rotating member 222.
For example, the rotating body 220 includes a female screw member 221 and a rotating member 222.
The female screw member 221 is a member provided with a female screw.
The rotating member 222 rotates around the central axis in response to the linear motion of the linear motion shaft 210.
The female screw member 221 and the rotating member 222 are arranged coaxially.
FIG. 7 shows a rotating body 220 having a structure composed of a female screw member 221 provided with a female screw and a rotating member 222.
The male screw of the male screw member 211 and the female screw of the female screw member 221 may be combined in a screw shape via a plurality of balls.
When the linear motion shaft 210 is constrained to rotate and moves linearly, the female screw member 221 is rotated via the ball, and the rotary member 222 coaxially fixed to the female screw member 221 is rotated.

The frame 230 is a structure that rotatably supports the rotating body 220.
The frame 230 may be capable of changing at least a part of the distance between the inner surface of the frame and the rotating body.
The bearing 235 is a mechanical element that rotatably supports the rotating body 220.

The viscous fluid 240 is a liquid sealed in the gap between the inner surface of the frame 230 and the rotating body 220.
When the rotating body 220 rotates relative to the frame 230, the viscous fluid 240 exerts a viscous force on the rotating body in the direction opposite to the rotation direction.
The viscous force gives the rotating body 220 a rotational torque reaction force.
The rotational torque reaction force is converted into a reaction force acting in the direction of linear displacement by the action of the male screw and the female screw.
This reaction force is substantially proportional to the velocity of the linear displacement of the linear axis.

The connecting member 250 is a member for connecting the spring-loaded viscous mass damper to the target structure.
The connecting member 250 is composed of a first connecting member 251 and a second connecting member 252.
The first connecting member 251 is a connecting member that can swing around one movable shaft that intersects in the direction of linear displacement.
The first connecting member 251 connects the target structure 30 and the frame 230.
The second connecting member 252 is a connecting member that can swing around one movable shaft that intersects in the direction of linear displacement.
The second connecting member 252 connects the linear motion shaft 210 and the elastic member 300.

The elastic member 300 is a member that generates an elastic reaction force in response to a linear displacement.
The elastic member 300 is composed of a pair of flanges 340 and a laminated rubber member.
The laminated rubber member is composed of a plurality of metal plate members 330, a plurality of elastic plate members 310, and a piezoelectric element member 320.
The metal plate member 330 is a metal plate-shaped member.
The elastic plate member 310 is a plate-shaped member made of an elastic body.
The piezoelectric element member 320 is a member having a plurality of piezoelectric elements and having a plate-like contour.

One of the pair of flanges 340 is fixed to one of the plurality of metal plate members 330.
The other one flange 340 of the pair is fixed to the other one metal plate member 330 of the plurality.
FIG. 8 shows how the first flange 341 is fixed to the first metal plate member 331, and the second flange 342 is fixed to the two second metal plate members 332 with fixing screws 343.
When shear deformation occurs along the linear motion direction between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 320, a potential difference is generated between the pair of terminals of the piezoelectric element 320a.
The electric circuit 410 is electrically connected between the pair of terminals of the piezoelectric element 320a.

At least a pair of metal plate members 330, one or more elastic plate members 310, and a piezoelectric element member 320 are laminated in a specific direction.
One first metal plate member 331, two second metal plate members 332, two elastic plate members 310, and two piezoelectric element members 320 may be laminated in a specific direction.
Here, the specific direction is a direction that intersects the displacement direction of the linear displacement.

The elastic plate member 310 is a member that is sheared and deformed in response to a linear displacement.
The elastic plate member 310 has a plate shape, and the pair of surfaces are sheared and deformed along the direction parallel to the surfaces in response to the linear displacement.
The elastic plate member 310 may be a member that has a surface facing in a direct specific direction and is sheared and deformed in response to a linear displacement.
For example, the elastic plate member 310 is a plate material made of an elastic material.
For example, the elastic plate member 310 is a rubber plate material.

Since the structure of the piezoelectric element member 320 is the same as that described in the description of the laminated rubber seismic isolation device 100 according to the embodiment of the present invention, the description thereof will be omitted.
In the explanation, the horizontal X-axis direction corresponds to the direction of linear displacement, and the vertical direction corresponds to a specific direction.

The control device 400 is a device that controls a viscous mass damper with a spring.
The control device 400 includes an electric circuit 410.
The electric circuit 410 is electrically connected between the pair of terminals of the piezoelectric element.
Since the structure of the electric circuit 410 is the same as that described in the description of the laminated rubber seismic isolation device 100 according to the embodiment of the present invention, the description thereof will be omitted.

The method of controlling the piezoelectric element member 320 by the control device 400 will be described below.

When it is determined that an earthquake has occurred, the impedance of the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation.
Here, the maximum amplitude value means the maximum value among the amplitude values of accelerations generated within a predetermined time.

An electrical circuit has a capacitor that is electrically connected between a pair of terminals of a plurality of piezoelectric elements.
When it is determined that an earthquake has occurred, the capacitance of the capacitor in the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation.

The state of the electric circuit can be selectively set to the ON state in which the current can flow due to the potential difference generated between the pair of terminals and the OFF state in which the current cannot flow due to the potential difference generated between the pair of terminals.
When it is determined that an earthquake has occurred, the state of the electric circuit is set to the ON state, and then the state is set from the ON state to the OFF state while the earthquake is continuing.

The motion characteristics and vibration characteristics of the spring-loaded viscous mass damper will be described below with reference to the drawings.
FIG. 9 is a model diagram of a vibration system according to an embodiment of the present invention.
FIG. 9 shows a system in which the inertial connection element 11 and the damper element 12 are connected in parallel (corresponding to a “viscous mass damper”) and a system in which the spring element 13 is directly connected (corresponding to a “spring-loaded viscous mass damper”). .) Indicates a model connected to the target structure.
The target structure 30 is modeled by a main mass 31 and a main elastic element 32.
The spring element 20 corresponds to the elastic member 300.

The viscous mass damper 10 is an apparent inertial mass mr which is a value obtained by dividing the reaction force acting when the linear motion shaft is linearly displaced by a predetermined relative acceleration by the relative acceleration of the linear motion displacement by the inertial connection element 11. have.
Further, the viscous mass damper has a damping coefficient c corresponding to a value obtained by dividing the reaction force acting when the linear motion shaft is linearly displaced at a constant relative velocity by the relative velocity by the damper element 12.

The viscous mass damper with a spring has an elastic coefficient kb, which is the value obtained by dividing the reaction force generated when the spring element 13 is displaced in the linear motion direction by a relative distance, and the linear motion axis of the viscous mass damper in the linear motion direction. It has a damper natural frequency ωr corresponding to the apparent inertial mass mr, which is the value obtained by dividing the reaction force acting in the linear motion direction when linearly moving at a predetermined relative acceleration.
Further, the viscous mass damper with a spring has a damping coefficient c corresponding to the value obtained by dividing the reaction force acting in the linear motion direction by the relative velocity when the linear motion axis of the viscous mass damper is linearly moved at a constant relative velocity. ..

The damping coefficient c changes in response to changing the separation distance of at least a part of the gap between the inner surface of the frame and the rotating body.

Next, the action of the spring-loaded viscous damper according to the embodiment of the present invention will be described with reference to the drawings.
The equivalent circuit of the piezoelectric element is shown in FIG.
When the target structure sways due to wind or earthquake, a reaction force in the direction of linear displacement acts on the spring-loaded viscous mass damper.
The reaction force due to vibration acts on the viscous mass damper and the elastic member.
A force due to vibration along the direction of linear displacement acts on the pair of flanges 340 of the elastic member.
As a result, shear deformation along the direction of linear displacement occurs in the elastic plate member and the piezoelectric element member.
When a shear displacement that repeats plus and minus along the direction of linear motion displacement occurs in the piezoelectric element member, plus and minus distortion occurs in the piezoelectric element.
When the piezoelectric element is distorted, an alternating potential difference occurs between the pair of terminals.
When the electric circuit is in the ON state, a current flows through the electric circuit corresponding to the impedance of the electric circuit, and vibration energy is converted into thermal energy by the resistance of the electric circuit.
The frequency characteristics of an electric circuit can be changed by changing the impedance of the electric circuit in response to a change in the maximum amplitude value of acceleration that occurs on the basis of the impedance of the electric circuit.
In addition, when it is determined that an earthquake has occurred, the state of the electric circuit is set to the ON state, and then the vibration energy is converted to thermal energy at a desired timing by setting the state from the ON state to the OFF state while the earthquake is continuing. Can be converted.
In addition, the current flowing through the electric circuit can be converted to direct current and stored in the secondary battery.

As described above, the laminated rubber seismic isolation device 100 according to the embodiment of the present invention has the following effects depending on its configuration.
A laminated rubber member 110 arranged between a pair of upper and lower flanges 120 is formed by laminating a plurality of metal plate members 111, a plurality of elastic plate members 112, and a piezoelectric element member 114 in the vertical direction, and the piezoelectric element member 114 has a plate shape. When a horizontal shear deformation occurs between the upper surface and the lower surface of the contour, a potential difference is generated between the pair of terminals of the piezoelectric element 114a, and the electric circuit 410 is electrically connected between the pair of terminals of the piezoelectric element 114a. Therefore, when the superstructure portion is shaken by a wind or an earthquake, the plurality of elastic plate members 112 and the piezoelectric element member 114 electrically connected to the electric circuit are subjected to shear deformation in the horizontal direction to cause the superstructure. It can affect the shaking.
Further, since the plurality of piezoelectric elements 114a are arranged along the horizontal plane inside the plate-shaped contour, a large number of the plurality of piezoelectric elements 114a can be arranged.
Further, since the plurality of piezoelectric elements 114a are sandwiched between the upper partition plate 114b and the lower partition plate 11c, which are a pair of upper and lower plate-shaped partition plates, and arranged in the horizontal direction, the electrical connection of the electric circuit 410 is made. Becomes easier.
Further, when a horizontal shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 114, shear distortion occurs in the plurality of piezoelectric elements 114a and a potential difference is generated between the pair of terminals. , The shear strain of the plurality of piezoelectric elements 114a electrically connected to the electric circuit 410 affects the shear deformation of the piezoelectric element member.
Further, when horizontal expansion and contraction deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 114, expansion and contraction distortion occurs in the plurality of piezoelectric elements 114a, and a potential difference is generated between the pair of terminals. , The expansion and contraction strain of the plurality of piezoelectric elements 114a electrically connected to the electric circuit 410 affects the shear deformation of the piezoelectric element member.
Further, when horizontal expansion and contraction deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 114, distortion due to bending occurs in the plurality of piezoelectric elements 114a, and a potential difference is generated between the pair of terminals. Therefore, the strain due to bending of the plurality of piezoelectric elements 114a electrically connected to the electric circuit 410 affects the shear deformation of the piezoelectric element member.
In addition, since the impedance of the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation when it is determined that an earthquake has occurred, multiple piezoelectric elements that are electrically connected to the electric circuit can be used. The effect of strain on the shear deformation of the piezoelectric element member can be changed according to the degree of the earthquake.
In addition, since the limited capacitance of the capacitor of the electric circuit is changed in response to the change of the maximum amplitude value of the acceleration that occurs in the foundation when it is judged that an earthquake has occurred, multiple electric circuits are electrically connected to the electric circuit. The effect of the strain of the piezoelectric element 114a on the shear deformation of the piezoelectric element member 114 can be changed according to the degree of the earthquake.
Further, when it is determined that an earthquake has occurred, the state of the electric circuit 410 is turned on, and then the state is changed from the ON state to the OFF state while the earthquake is continuing, so that the electric circuit 410 is electrically connected. The effect of the strain of the plurality of piezoelectric elements 114a on the shear deformation of the piezoelectric element member 114 can be changed according to the transition of the state after the occurrence of the earthquake.

As described above, the spring-loaded viscous mass damper according to the embodiment of the present invention has the following effects depending on its configuration.
A viscous mass damper 200 composed of a linear motion shaft 210, a rotating body 220 rotated by the linear motion shaft 210, a frame 230 rotatably supporting the rotating body 220, and a viscous fluid 240 enclosed in the frame 230, and an elastic reaction force. The elastic members 300 are connected in series, and the elastic members 300 are arranged between the pair of upper and lower flanges 340. When the piezoelectric element members 320 are laminated in a specific direction and a shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 320 in the direction of linear motion displacement, a potential difference is generated between the pair of terminals of the piezoelectric element 320a, and an electric circuit is used. Since the 410 is electrically connected between the pair of terminals of the piezoelectric element 320a, it is electrically connected to the plurality of elastic plate members 310 and the electric circuit when the upper structure is shaken by a wind or an earthquake. Horizontal shear deformation occurs in the piezoelectric element member 320, which can affect the shaking of the superstructure.
Further, since the plurality of piezoelectric elements 320a are arranged inside the plate-shaped contour along the plane orthogonal to the specific direction, a large number of the plurality of piezoelectric elements can be arranged.
Further, since the plurality of piezoelectric elements 320a are sandwiched between the first partition plate 320b and the second partition plate 320c, which are a pair of plate-shaped partition plates, and arranged in a specific direction, the electrical circuit 410 is electrically connected. Easy to connect.
Further, when shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 320 in the direction of linear motion displacement, shear distortion occurs in the plurality of piezoelectric elements 320a and a potential difference is generated between the pair of terminals. Therefore, the shear distortion of the plurality of piezoelectric elements 320a electrically connected to the electric circuit 410 affects the shear deformation of the piezoelectric element member 320.
Further, when shear deformation in the direction of linear motion displacement occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 320, expansion and contraction distortion occurs in the plurality of piezoelectric elements and a potential difference is generated between the pair of terminals. Therefore, the expansion and contraction strain of the plurality of piezoelectric elements 320a electrically connected to the electric circuit 410 affects the shear deformation of the piezoelectric element member 320.
Further, when shear deformation in the direction of linear motion displacement occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member 320, distortion due to bending occurs in the plurality of piezoelectric elements, and a potential difference is generated between the pair of terminals. Therefore, the strain due to bending of the plurality of piezoelectric elements 320a electrically connected to the electric circuit affects the shear deformation of the piezoelectric element member 320.
In addition, since the impedance of the electric circuit 410 is changed in response to the change in the maximum amplitude value of the acceleration that occurs in the foundation when it is determined that an earthquake has occurred, a plurality of piezoelectrics electrically connected to the electric circuit 410 are changed. The effect of the strain of the element on the shear deformation of the piezoelectric element member 320 can be changed according to the degree of the earthquake.
In addition, since the capacitance of the capacitor of the electric circuit 410 is changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation when it is determined that an earthquake has occurred, it is electrically connected to the electric circuit 410. The effect of the strain of the plurality of piezoelectric elements 320a on the shear deformation of the piezoelectric element member 420 can be changed according to the degree of the earthquake.
In addition, when it is determined that an earthquake has occurred, the state of the electric circuit is turned on, and then the state is changed from the ON state to the OFF state while the earthquake is continuing, so that it is electrically connected to the electric circuit 410. The influence of the strain of the plurality of piezoelectric elements on the shear deformation of the piezoelectric element member 320 can be changed according to the transition of the state after the occurrence of the earthquake.
As a result, it is possible to provide a seismic isolation device capable of responding to a small earthquake to a large earthquake with a simple structure as compared with the conventional structure.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the gist of the invention.

10 Viscous mass damper 11 Inertial connection element 12 Damper element 13 Spring element 30 Target structure 31 Main mass 32 Main elastic element 33 Mounting part 40 Support structure 100 Laminated rubber seismic isolation device 110 Laminated rubber member 111 Metal plate member 111a Top metal plate Member 111b Lowermost metal plate member 112 Elastic plate member 113 Outer peripheral covering material 114 piezoelectric element member 114a piezoelectric element 114b Upper partition plate 114c Lower partition plate 120 Flange 120u Upper flange 120d Lower flange 121 Flange member 122 Sheep key 200 Viscous mass damper 210 Straight Dynamic shaft 211 Male thread member 220 Rotating body 221 Female thread member 222 Rotating member 230 Frame 235 Bearing 240 Viscous fluid 250 Connecting member 251 First connecting member 252 Second connecting member 300 Elastic member 310 Elastic plate member 320 Piezoelectric element member 320a 1 partition plate 320c 2nd partition plate 330 metal plate member 331 1st metal plate member 332 2nd metal plate member 340 flange 341 1st flange 342 2nd flange 343 fixing screw 400 control device 410 electric circuit

Japanese Unexamined Patent Publication No. 2012-237413 Japanese Unexamined Patent Publication No. 2016-039686 JP-A-2010-101129 Japanese Patent Application Laid-Open No. 2008-259354 Japanese Patent Application Laid-Open No. 2008-190617 Japanese Patent Application Laid-Open No. 2006-207949 Japanese Patent Application Laid-Open No. 2000-120765 Japanese Patent Application Laid-Open No. 10-30680 JP 2001-0499894 Japanese Patent Application Laid-Open No. 9-329168 Japanese Patent Application Laid-Open No. 2012-37005

Claims (14)

A laminated rubber seismic isolation device installed on the foundation to support the superstructure.
A pair of upper and lower flanges, an upper flange and a lower flange,
A plurality of metal plate members which are a plurality of metal plate-shaped members, a plurality of elastic plate members which are a plurality of elastic plate-shaped members, and a plurality of members having a plurality of piezoelectric elements and having a plate-like contour. A laminated rubber member in which the piezoelectric element members of the above are laminated in multiple stages in the vertical direction, and
An electric circuit electrically connected between the pair of terminals of the piezoelectric element and
With
The upper flange is arranged on the upper part of the laminated rubber member, and the upper flange is arranged.
The lower flange is arranged below the laminated rubber member,
When the pair of horizontal directions that intersect when viewed from above are called the X-axis direction and the Y-axis direction,
When shear deformation occurs in the X-axis direction between the upper surface and the lower surface of the plate-like contour of one of the plurality of piezoelectric element members that overlap in multiple stages, the piezoelectric element is deformed in the X-axis direction. A potential difference is generated between the pair of terminals of the piezoelectric element.
When a shear deformation in the Y-axis direction occurs between the upper surface and the lower surface of the plate-like contour of the other one of the plurality of piezoelectric element members overlapping in multiple stages, the piezoelectric element is deformed in the Y-axis direction. Causes a potential difference between the pair of terminals of the piezoelectric element.
A laminated rubber seismic isolation device characterized by this. The state of the electric circuit is selected from the ON state in which the current flows due to the potential difference generated in the pair of the terminals to convert the vibration energy into thermal energy and the OFF state in which the current does not flow due to the potential difference generated between the pair of the terminals. Can be set as
When it is determined that an earthquake has occurred, the state of the electric circuit is changed to the ON state, and then the conversion of the vibration energy to the thermal energy is changed from the ON state to the OFF state at a desired timing.
The laminated rubber seismic isolation device according to claim 1. A viscous mass damper with a spring that is installed in a target structure supported by a foundation and generates a reaction force in response to linear displacement.
A linear motion shaft provided with a male screw whose screw feed direction is directed along the displacement direction of the linear motion displacement, a rotating body provided with a female screw that fits the male screw, a frame for rotatably supporting the rotating body, and the frame. A viscous mass damper having a viscous fluid enclosed in a gap between the inner surface of the rotating body and the rotating body.
An elastic member that generates an elastic reaction force in response to the linear displacement,
Electric circuit and
With
The specific direction is the direction orthogonal to the linear displacement.
The viscous mass damper and the elastic member are connected in series,
The elastic member has a pair of flanges, a plurality of metal plate members which are a plurality of metal plate-shaped members, a plurality of elastic plate members which are a plurality of elastic plate-shaped members, and a plurality of piezoelectric elements. A laminated rubber member in which a piezoelectric element member, which is a member having the contour of the above, is laminated in the specific direction, and a laminated rubber member.
Have,
One of the pair of flanges is fixed to one of the plurality of metal plate members,
The other one flange of the pair is fixed to the other one metal plate member of the plurality.
When shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member along the direction of the linear displacement, a potential difference is generated between the pair of terminals of the piezoelectric element.
The electric circuit is electrically connected between the pair of terminals of the piezoelectric element.
A viscous mass damper with a spring that is characterized by this. A plurality of piezoelectric elements are arranged inside the plate-shaped contour along a plane orthogonal to a specific direction.
The viscous mass damper with a spring according to claim 3. The piezoelectric element member has a pair of plate-shaped partition plates and a plurality of the piezoelectric elements.
The plurality of piezoelectric elements are sandwiched between the pair of partition plates and arranged along a plane orthogonal to a specific direction.
The viscous mass damper with a spring according to claim 4. When it is determined that an earthquake has occurred, the impedance of the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation.
The viscous mass damper with a spring according to claim 5. The electric circuit has a capacitor that is electrically connected between a pair of terminals of the plurality of piezoelectric elements.
When it is determined that an earthquake has occurred, the capacitance of the capacitor in the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation.
The viscous mass damper with a spring according to claim 6. The state of the electric circuit is selected from the ON state in which the current flows due to the potential difference generated in the pair of the terminals to convert the vibration energy into thermal energy and the OFF state in which the current does not flow due to the potential difference generated between the pair of the terminals. Can be set as
When it is determined that an earthquake has occurred, the state of the electric circuit is changed to the ON state, and then the conversion of the vibration energy to the thermal energy is changed from the ON state to the OFF state at a desired timing.
The viscous mass damper with a spring according to claim 7. When shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member in the direction of linear displacement, shear distortion occurs in a plurality of piezoelectric elements.
When the shear strain occurs in a plurality of piezoelectric elements, a potential difference is generated between the pair of terminals.
The viscous mass damper with a spring according to claim 3. When shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member in the direction of linear displacement, expansion and contraction strain occurs in the plurality of piezoelectric elements.
When the expansion and contraction strain occurs in a plurality of piezoelectric elements, a potential difference occurs between the pair of terminals.
The viscous mass damper with a spring according to claim 3. When shear deformation occurs between the upper surface and the lower surface of the plate-shaped contour of the piezoelectric element member in the direction of linear displacement, the plurality of piezoelectric elements are distorted due to bending.
When distortion occurs in a plurality of piezoelectric elements due to the bending, a potential difference occurs between the pair of terminals.
The viscous mass damper with a spring according to claim 3. When it is determined that an earthquake has occurred, the impedance of the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation.
The viscous mass damper with a spring according to claim 3. The electric circuit has a capacitor that is electrically connected between a pair of terminals of the plurality of piezoelectric elements.
When it is determined that an earthquake has occurred, the capacitance of the capacitor in the electric circuit is changed in response to the change in the maximum amplitude value of the acceleration that occurs on the foundation.
The viscous mass damper with a spring according to claim 3. The state of the electric circuit is selected from the ON state in which the current flows due to the potential difference generated in the pair of the terminals to convert the vibration energy into thermal energy and the OFF state in which the current does not flow due to the potential difference generated between the pair of the terminals. Can be set as
When it is determined that an earthquake has occurred, the state of the electric circuit is changed to the ON state, and then the conversion of the vibration energy to the thermal energy is changed from the ON state to the OFF state at a desired timing.
The viscous mass damper with a spring according to claim 3.

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