JP5309269B1 - Seismic isolation and control devices for structures and seismic isolation and control methods for structures. - Google Patents

Abstract

To control the displacement and speed of the lower structure and the upper structure due to the inertial force acting on the structure with a simple configuration, and to reduce the load on the upper structure and the lower structure due to the large inertial force during the earthquake. It aims to provide a seismic isolation and control device and a seismic isolation and control method for structures.
An elastic body 6 fixed to one of an upper structure 3 or a lower structure 2 of a structure such as a building or a bridge, and an inner input / output engagement portion 10a fixed integrally to the elastic body are formed. Inner input / output member 10, a plurality of support shafts 8 fixed to the outer side of the inner input / output member, and rotatably supported by the support shaft and moved to the inner input / output engagement portion 10a at one end. An inner input / output fulcrum 9a that can be engaged, an inertial force transmission means 9 comprising a link member having an outer input / output fulcrum 9b at the other end, and the outer input / output fulcrum fixed to the other of the upper structure or the lower structure. And an outer input / output member 11 that forms an outer input / output engaging portion 11a that is movably engaged, and the distance between the outer input / output fulcrum and the inner input / output fulcrum from the support shaft of the inertial force transmission means is different. It works at the time of earthquake by setting Displacement of the upper structure and lower structure by sex force, and controlling the velocity and acceleration.
[Selection] Figure 2

Description

  The present invention relates to a seismic control and seismic isolation device for a structure such as a building or a bridge and a seismic isolation and seismic control method for the structure, and a displacement amount of the lower structure or the upper structure due to an inertial force acting on the structure at the time of the earthquake. The present invention relates to a structure damping and seismic isolation device and a structure seismic isolation and damping method capable of controlling speed.

  After the Hyogoken-Nanbu Earthquake, seismic isolation structures that reduce seismic force and improve seismic resistance through longer periods and higher damping using high-damping rubber-based seismic isolation bearings and laminated rubber bearings with lead plugs are common Has been adopted.

  In addition, as a function-separated type support structure, a case in which a support structure combining a vertical load support bearing that handles a vertical load and a horizontal force distributed bearing that handles a horizontal force is increasing.

JP 2001-140976 A JP 2001-227197 A

  In the conventional bearing structure, an inertial force acts on a lower structure in a structure such as a building or a bridge during an earthquake, and the inertial force is transmitted to the upper structure 3 via a bearing device having laminated rubber. In that case, it elastically deforms in the same direction as the direction of the inertial force of the laminated rubber substructure. The seismic energy transmitted to the superstructure acts on the superstructure as a large earthquake inertia force with an acceleration component. The inertial force during earthquake acting on the superstructure is transmitted to the substructure via a bearing having laminated rubber. A large inertial force in the same direction as the earthquake inertial force of the superstructure acts on the substructure. Not only the bearing device is destroyed by a large inertial force acting on the superstructure, but also the substructure itself may be damaged by a large inertial force acting on the substructure such as a pier, abutment, and foundation structure. In addition, a large horizontal displacement occurs in the superstructure. For a large horizontal displacement of the superstructure, a damper, a displacement limiting device, a falling bridge prevention device, etc. are required to absorb the displacement. In order not to damage the lower structure due to a large inertial force applied to the lower structure, it is necessary to increase the design strength of the lower structure. In order to increase the design strength of the substructure, it is necessary to increase the number of foundation piles and various dimensions of the piers and abutments and the amount of reinforcement. For this reason, both the case of seismic reinforcement of existing bridges or existing buildings and the case of construction of new structures have the problem that many construction days and a large amount of cost are required.

  The present invention solves the above-mentioned conventional problems, and controls the displacement and speed of the lower structure and the upper structure due to the inertial force acting on the structure at the time of an earthquake with a simple configuration, so that the large inertial force at the time of the earthquake can be obtained. It is an object of the present invention to provide a structure seismic isolation and damping device and a structure seismic isolation and damping method capable of reducing the load on the upper and lower structures due to the action.

  In order to solve the above problems, the structure seismic isolation and vibration control device of the present invention includes an elastic body fixed to one of an upper structure or a lower structure of a structure such as a building or a bridge, and the elastic body. An inner input / output member having an inner input / output engaging portion fixed integrally, a plurality of support shafts fixed to the outside of the inner input / output member, and one end rotatably supported by the support shaft An inner input / output fulcrum that is movably engaged with the inner input / output engagement portion, an inertial force transmission means comprising a link member having an outer input / output fulcrum at the other end, and the other of the upper structure or the lower structure And an outer input / output member that forms an outer input / output engaging portion that is movably engaged with the outer input / output fulcrum, and is provided with an outer input / output fulcrum and an inner input / output from the support shaft of the inertial force transmission means. By setting different distances between the fulcrums during an earthquake Displacement of the upper structure and lower structure by inertial force that use, and controlling the velocity and acceleration.

  In the structure seismic isolation and damping device of the present invention, the inner input / output engaging portion is a ring-shaped or arc-shaped groove having substantially the same width as the outer diameter of the inner input / output fulcrum, and the outer input / output engagement The joint portion may be a member extending in parallel at substantially the same interval as the outer diameter of the outer input / output fulcrum or a linearly extending groove having the same width as the outer diameter of the outer input / output fulcrum.

  Moreover, the seismic isolation and damping device for a structure of the present invention is characterized in that the elastic body is a rubber or a spring member.

  Further, the seismic isolation and damping method for a structure of the present invention includes a plurality of link members that are pivotally supported by a support shaft on one of an upper structure or a lower structure of a structure such as a building or a bridge. Inertial force transmission means is provided, inner input / output fulcrum and outer input / output fulcrum are arranged at both ends of the inertial force transmission means, and the inner input / output fulcrum is integrated with an elastic body fixed to one of the upper structure or the lower structure. An outer input / output member that is movably engaged with an inner input / output engaging portion formed on the inner input / output member and is formed on the outer input / output member with the outer input / output fulcrum fixed to the other of the upper structure or the lower structure. Upper structure and lower part due to inertial force acting at the time of earthquake by setting the distance between the outer input / output fulcrum and the inner input / output fulcrum differently from the support shaft of the inertial force transmission means The displacement, velocity and acceleration of the structure Characterized in that the Gosuru.

  Further, in the seismic isolation and damping method for a structure of the present invention, the inner input / output engaging portion is a ring-shaped or arc-shaped groove having substantially the same width as the outer diameter of the inner input / output fulcrum, The joint portion may be a member extending in parallel at substantially the same interval as the outer diameter of the outer input / output fulcrum or a linearly extending groove having the same width as the outer diameter of the outer input / output fulcrum.

  Moreover, the seismic isolation and damping method for a structure according to the present invention is characterized in that the elastic body is a rubber or a spring member.

An elastic body fixed to one of an upper structure or a lower structure of a structure such as a building or a bridge; an inner input / output member formed with an inner input / output engaging portion fixed integrally to the elastic body; A plurality of support shafts fixed to the outside of the input / output member; an inner input / output fulcrum that is rotatably supported by the support shaft and is movably engaged with the inner input / output engagement portion at one end portion; Inertial force transmission means composed of a link member having an outer input / output fulcrum at the end of the upper part and an outer input / output engaging part fixed to the other of the upper structure or the lower structure and engaged with the outer input / output fulcrum movably An outer input / output member, and an upper structure and a lower part due to an inertial force acting during an earthquake by setting different distances between the outer input / output fulcrum and the inner input / output fulcrum from the support shaft of the inertial force transmission means The displacement, velocity and acceleration of the structure By controlling it, the apparent rigidity is increased with a simple structure to suppress the displacement due to the seismic force of the superstructure or the substructure, and the speed due to the seismic force is reduced, and the acceleration due to the seismic force is suppressed to suppress the superstructure or substructure. It is possible to greatly reduce the load caused by the seismic force.
The inner input / output engagement part is a ring-shaped or arcuate groove having the same width as the outer diameter of the inner input / output fulcrum, and the outer input / output engagement part extends in parallel at substantially the same interval as the outer diameter of the outer input / output fulcrum. Alternatively, the length of the inertial force transmission means composed of the link member can be shortened by using a groove extending linearly with the same width as the outer diameter of the outer input / output fulcrum. It becomes possible to reduce the size.
By making the elastic body a rubber or a spring member, it is easy to obtain and the production cost can be reduced.
A plurality of inertial force transmission means comprising link members pivotally supported by a support shaft is provided on one of the upper structure or the lower structure of a structure such as a building or a bridge, and inner sides are provided at both ends of the inertial force transmission means. An input / output fulcrum and an outer input / output fulcrum are arranged, and the inner input / output fulcrum is formed on an inner input / output engagement portion formed on an inner input / output member integrated with an elastic body fixed to one of the upper structure or the lower structure. The outer input / output fulcrum is fixed to the other of the upper structure or the lower structure and is movably engaged with an outer input / output engaging portion formed on the outer input / output member. By setting the distance between the outer input / output fulcrum and the inner input / output fulcrum to be different from the support shaft, the displacement, speed and acceleration of the superstructure and substructure due to the inertial force acting at the time of earthquake can be controlled, and the apparent Superstructure with increased rigidity Suppresses a displacement amount due to seismic forces of the lower structure and to reduce the rate by seismic forces, it is possible to remarkably reduce the load due to seismic forces of the superstructure or substructure by suppressing the acceleration due to seismic forces.
The inner input / output engagement part is a ring-shaped or arcuate groove having the same width as the outer diameter of the inner input / output fulcrum, and the outer input / output engagement part extends in parallel at substantially the same interval as the outer diameter of the outer input / output fulcrum. Or, by using a linearly extending groove having the same width as the outer diameter of the outer input / output fulcrum, it is possible to significantly reduce the load caused by the seismic force of the upper structure or lower structure using a downsized device. .
By making the elastic body a rubber or a spring member, it is possible to provide a seismic isolation and seismic control method for a structure that is easily available and low in cost.

It is a figure which shows embodiment of the structure seismic isolation method of this invention. It is a figure which shows embodiment of the structure seismic isolation method of this invention. (A) (b) It is a figure which shows embodiment of the structure seismic isolation method of this invention. (A) (b) It is a figure which shows embodiment of the structure seismic isolation method of this invention. (A) (b) It is a figure which shows embodiment of the structure seismic isolation method of this invention. It is a figure which shows embodiment of the structure seismic isolation method of this invention. It is a figure which shows embodiment of the structure seismic isolation method of this invention.

  Embodiments of the present invention will be described with reference to the drawings.

  The structural seismic isolation and seismic isolation device 1 of the present invention is disposed between a lower structure 2 and an upper structure 3 of a structure such as a building or a bridge. As shown in FIGS. 3A and 3B, an elastic body 6 is installed at the center of the base plate 4 that is fixed to the lower structure 2 with fixing bolts 5. The elastic body 6 is rubber or a spring. In this embodiment, a laminated rubber is used in which a plurality of rubbers and reinforcing steel plates are alternately laminated in the vertical direction and vulcanized and integrally formed. The inner input / output member 10 is integrally fixed on the elastic body 6.

  On the surface of the inner input / output member 10, an inner input / output engaging portion 10a made of a ring-shaped or arc-shaped groove is formed. When the elastic body 6 is rubber, the inner input / output member 10 may be integrated with rubber by vulcanization integral molding. A plurality of support members 7 are fixed to the outer position of the base plate 4 where the elastic body 6 and the inner input / output member 10 are installed by connecting bolts or welding. The support member 7 is formed with a support shaft female screw hole 7 a for screwing the support shaft 8.

  An inertial force transmission means 9 made of a link member is rotatably supported on a support shaft 8 screwed into a support shaft female screw hole 7a of the support member 7. As shown in FIGS. 5 (a) and 5 (b), the inertial force transmission means 9 made of a link member is formed with a through hole 9c for supporting the support shaft 8 and has a pin-shaped inner input / output at one end. A fulcrum 9a is disposed, and a pin-shaped outer input / output fulcrum 9b is disposed at the other end. The inner input / output fulcrum 9a and the outer input / output fulcrum 9b are arranged on the front surface side and the back surface side of the inertial force transmission means 9, respectively. The inertial force transmission means 9 shown in FIG. 4 is formed by a linear link member, but may be an arc-shaped link member as shown in FIG. 7, or a link member of another shape.

  As shown in FIGS. 4A and 4B, the outer input / output member 11 fixed to the upper structure 3 by the set bolt 12 has a plurality of female screw holes 11b for set bolts. The outer input / output member 11 is formed with a key groove 11 d that accommodates a shear key 13 installed between the outer input / output member 11 and the outer structure 3. On the back side of the outer input / output member 11, a plurality of outer input / output engaging portions 11a are arranged. The outer input / output engagement portion 11a is formed of a member that extends in parallel at substantially the same interval as the outer diameter of the outer input / output fulcrum 9b of the inertial force transmission means 9. When the outer input / output engaging portion 11a is formed of a member extending in parallel, a space can be formed between the rear surface of the outer input / output member 11 and the inertial force transmission means 9 including a link member. A link pressing portion 11c that abuts against the inside of the inertial force transmission means 9 is formed at the center portion of the.

  Further, the outer input / output engaging portion 11a may be a linear groove having a width substantially the same as the outer diameter of the outer input / output fulcrum 9b formed on the back surface of the outer input / output member 11, and in this case, it is made of a link member. Since no gap is generated between the inertia force transmission means 9 and the back surface of the outer input / output member 11, the link pressing portion 11c can be omitted. When the outer input / output member 11 is a sole plate that is fixed to the upper structure 3 by welding in advance, the female screw hole 11b for the set bolt and the key groove 11 can be omitted.

  1 and 2 show a state in which a plurality of inertial force transmission means 9 are installed between the lower structure 2 and the upper structure 3. The inner input / output fulcrum 9a of the inertial force transmission means 9 made of a link member pivotally supported by the support shaft 8 is movably engaged with the inner input / output engagement portion 10a made of a ring-shaped or arcuate groove. The outer diameter of the inner input / output fulcrum 9a and the groove width of the inner input / output engaging portion 10a are substantially the same. The outer input / output fulcrum 9b of the inertial force transmission means 9 is movably engaged with an outer input / output engaging portion 11a formed of a member extending in parallel with the outer input / output member 11. The inner part of the inertial force transmission means 9 made of a link member comes into contact with the link pressing part 11c formed on the back surface of the outer input / output member 11, and the rotation of the inertial force transmission means 9 about the support shaft 8 is stabilized. Can be implemented.

  The operation of the seismic isolation and damping device 1 of the present invention will be described with reference to FIG. The distance between the support shaft 8 and the inner input / output fulcrum 9a of the inertial force transmission means 9 is n, and the distance between the support shaft 8 and the outer input / output fulcrum 9b is m. n and m are different numbers. n and m are set according to various design requirements at the time of designing such as displacement restriction of the upper structure 3 and seismic strength of the lower structure 2. In this embodiment, n> m. Inertial force acting on the lower structure 2 during an earthquake is transmitted to the elastic body 6 and is elastically deformed to be transmitted to the inner input / output member 10. The inertial force transmitted to the inner input / output member 10 is transmitted to the inertial force transmission means 9 via the inner input / output fulcrum 9a that engages with the inner input / output engagement portion 10a formed of a ring-shaped or arcuate groove.

  The inertial force transmission means 9 to which the inertial force is transmitted rotates in the direction of the arrow from the dotted line position of FIG. 6 to the solid line position with the support shaft 8 as an axis. The inner input / output fulcrum 9a engaged with the inner input / output engaging portion 10a is displaced by the displacement amount δ1 at the speed V1. On the other hand, the outer input / output fulcrum 9b engaged with the outer input / output engaging portion 11a is displaced by the displacement amount δ2 at the speed V2.

  The inner input / output fulcrum 9a and the outer input / output fulcrum 9b rotate about the same support shaft 8. Therefore, the displacement amount δ2 = m / n × δ1 and the speed V2 = m / n × V1. In this embodiment, since n> m, δ2 <δ1 and V2 <V1.

  In this embodiment, the inner input / output fulcrum 9a engages with the inner input / output engaging portion 10a of the inner input / output member 10 integrated with the elastic body 6 fixed to the lower structure 2, and the outer input / output fulcrum 9b. Is engaged with the outer input / output engaging portion 11 a of the outer input / output member 11 fixed to the upper structure 3. As a result, the inertial force transmitted from the lower structure 2 during the earthquake is transmitted to the upper structure 3 via the outer input / output fulcrum 9b.

  Since the distance from the rotation axis of the inertial force transmission means 9 made of a link member is set as n> m, the displacement δ2 and the speed V2 of the outer input / output fulcrum 9b engaged with the upper structure 3 side are: Compared to the displacement amount δ1 and the velocity V1 of the inner input / output fulcrum 9a engaged with the lower structure 2 side, it becomes smaller by m / n.

  In general, an inertial force generated by a seismic force has a displacement amount and a speed determined by mass and rigidity. In order to suppress the amount of displacement, it is sufficient to increase the rigidity. However, if the rigidity is increased, the acceleration increases. When the acceleration increases, the inertial force during the earthquake of the upper structure 3 increases, the load of the lower structure 2 increases, and the seismic strength of the lower structure needs to be increased. In order to suppress the acceleration, it is effective to suppress the speed.

  In the embodiment shown in the figure, by setting n> m, the displacement amount δ2 = m / n × δ1 of the upper structure 3 is reduced and the velocity V2 = m / n × V1 is reduced. As the speed decreases, the acceleration of the superstructure 3 also decreases. When the displacement amount of the upper structure 3 is reduced, when the structure is a bridge, the space between the telescopic devices can be narrowed. Further, by reducing the speed of the upper structure 3, the acceleration of the upper structure 3 is also reduced, and the load on the lower structure 2 due to the inertial force during the earthquake of the upper structure 3 can be reduced.

  In the embodiment shown in the figure, the inner input / output member 10 is disposed on the lower structure 2 side and the outer input / output member 11 is disposed on the upper structure 3 side. However, the inner input / output member 10 is disposed on the upper structure 3 side. The outer input / output member 11 may be disposed on the lower structure 2 side. Further, in order to reduce the load on the lower structure 2, n <m may be set as the reverse of the embodiment shown in the figure.

  As described above, according to the seismic isolation and damping device 1 for a structure and the seismic isolation and damping method for a structure of the present invention, the support shaft 8 of the inertial force transmission means 9 made of a link member is connected to the lower structure side. By setting the distance between the input / output engagement portion and the upper structure side input / output engagement portion to be different, the apparent rigidity is increased, and the displacement amount due to the seismic force of the upper structure 3 or the lower structure 2 is suppressed. It is possible to reduce the load due to the seismic force of the upper structure 3 or the lower structure 2 by reducing the speed due to the force and suppressing the acceleration due to the seismic force.

  1: seismic isolation and vibration control device for structure, 2: lower structure, 3: upper structure, 4: base plate, 5: fixing bolt, 6: elastic body, 7: support member, 7a: female screw hole for support shaft, 8 : Support shaft, 9: Inertial force transmission means, 9a: Inner input / output fulcrum, 9b: Outer input / output fulcrum, 9c: Through hole, 10: Inner input / output member, 10a: Inner input / output engaging portion, 11: Outer input Output member, 11a: outer input / output engaging portion, 11b: female screw hole for set bolt, 11c: link pressing portion, 11d: key groove, 12: set bolt, 13: shear key

Claims (6)

An elastic body fixed to one of the upper structure or the lower structure of a structure such as a building or a bridge;
An inner input / output member integrally formed with the elastic body and forming an inner input / output engaging portion;
A plurality of support shafts fixed to the outside of the inner input / output member;
Inertia comprising a link member rotatably supported by the support shaft and having an inner input / output fulcrum at one end movably engaged with the inner input / output engaging portion and an outer input / output fulcrum at the other end. Force transmission means;
An outer input / output member that is fixed to the other of the upper structure or the lower structure and that forms an outer input / output engaging portion that the outer input / output fulcrum engages with movement;
With
By controlling the distance between the outer input / output fulcrum and the inner input / output fulcrum from the support shaft of the inertial force transmission means, the displacement, speed and acceleration of the superstructure and substructure due to the inertial force acting during an earthquake are controlled. A seismic isolation and damping device for a structure.   The inner input / output engagement portion is a ring-shaped or arc-shaped groove having the same width as the outer diameter of the inner input / output fulcrum, and the outer input / output engagement portion is substantially the same as the outer diameter of the outer input / output fulcrum. 2. The seismic isolation and damping device for a structure according to claim 1, wherein the structure is a member extending in parallel or a linearly extending groove having the same width as the outer diameter of the outer input / output fulcrum.   The seismic isolation and damping device for a structure according to claim 1 or 2, wherein the elastic body is a rubber or a spring member.   A plurality of inertial force transmission means comprising link members pivotally supported by a support shaft is provided on one of the upper structure or the lower structure of a structure such as a building or a bridge, and inner sides are provided at both ends of the inertial force transmission means. An input / output fulcrum and an outer input / output fulcrum are arranged, and the inner input / output fulcrum is formed on an inner input / output engagement portion formed on an inner input / output member integrated with an elastic body fixed to one of the upper structure or the lower structure. The outer input / output fulcrum is fixed to the other of the upper structure or the lower structure and is movably engaged with an outer input / output engaging portion formed on the outer input / output member. By setting the distance between the outer input / output fulcrum and the inner input / output fulcrum different from the support shaft, the displacement, speed and acceleration of the superstructure and substructure due to the inertial force acting at the time of earthquake are controlled. Seismic isolation and control for structures Law.   The inner input / output engagement portion is a ring-shaped or arcuate groove having the same width as the outer diameter of the inner input / output fulcrum, and the outer input / output engagement portion is spaced at substantially the same interval as the outer diameter of the outer input / output fulcrum. 5. The seismic isolation and seismic control method for a structure according to claim 4, wherein the member is a parallel extending member or a linearly extending groove having the same width as the outer diameter of the outer input / output fulcrum.   6. The seismic isolation and damping method for a structure according to claim 4, wherein the elastic body is a rubber or a spring member.

Images